diff --git "a/NEC_url_slim.json" "b/NEC_url_slim.json" new file mode 100644--- /dev/null +++ "b/NEC_url_slim.json" @@ -0,0 +1,58197 @@ +{ + "Chapter 2 Wiring and Protection": [ + { + "displayTitle": "Chapter 2 Wiring and Protection", + "children": [ + { + "displayTitle": "Article 200 Use and Identification of Grounded Conductors", + "children": [ + { + "body": "This article provides requirements for the following: Identification of terminalsGrounded conductors in premises wiring systemsIdentification of grounded conductorsInformational Note: See Article 100 for definitions of Grounded Conductor, Equipment Grounding Conductor, and Grounding Electrode Conductor. [200.1](https://2023.antflix.net#200.1)", + "displayTitle": "200.1 Scope", + "children": [], + "url": "https://2023.antflix.net#200.1" + }, + { + "body": "Grounded conductors shall comply with 200.2(A) and (B). [200.2](https://2023.antflix.net#200.2)", + "displayTitle": "200.2 General", + "children": [ + { + "body": "The grounded conductor, if insulated, shall have insulation that complies with either one of the following: Is suitably rated, other than color, for any ungrounded conductor of the same circuit for systems of 1000 volts or less.Is rated not less than 600 volts for solidly grounded neutral systems of over 1000 volts in accordance with 250.184(A) [200.2_(A)](https://2023.antflix.net#200.2_(A))", + "displayTitle": "(A) Insulation", + "children": [], + "url": "https://2023.antflix.net#200.2_(A)" + }, + { + "body": "The continuity of a grounded conductor shall not depend on a connection to a metal enclosure, raceway, or cable armor. Informational Note: See 300.13(B) for the continuity of grounded conductors used in multiwire branch circuits. [200.2_(B)](https://2023.antflix.net#200.2_(B))", + "displayTitle": "(B) Continuity", + "children": [], + "url": "https://2023.antflix.net#200.2_(B)" + } + ], + "url": "https://2023.antflix.net#200.2" + }, + { + "body": "Grounded conductors of premises wiring systems shall be electrically connected to the supply system grounded conductor to ensure a common, continuous grounded system. For the purpose of this section, electrically connected shall mean making a direct electrical connection capable of carrying current, as distinguished from induced currents. Exception: Listed interactive inverters identified for use in distributed resource generation systems such as photovoltaic and fuel cell power systems shall be permitted to be connected to premises wiring without a grounded conductor if the connected premises wiring or utility system includes a grounded conductor. [200.3](https://2023.antflix.net#200.3)", + "displayTitle": "200.3 Connection to Grounded System", + "children": [], + "url": "https://2023.antflix.net#200.3" + }, + { + "body": "Neutral conductors shall be installed in accordance with 200.4(A) and (B). [200.4](https://2023.antflix.net#200.4)", + "displayTitle": "200.4 Neutral Conductors", + "children": [ + { + "body": "Neutral conductors shall not be used for more than one branch circuit, for more than one multiwire branch circuit, or for more than one set of ungrounded feeder conductors unless specifically permitted elsewhere in this Code. Informational Note: See 215.4 for information on common neutrals. [200.4_(A)](https://2023.antflix.net#200.4_(A))", + "displayTitle": "(A) Installation", + "children": [], + "url": "https://2023.antflix.net#200.4_(A)" + }, + { + "body": "Where more than one neutral conductor associated with different circuits is in an enclosure, grounded circuit conductors of each circuit shall be identified or grouped to correspond with the ungrounded circuit conductor(s) by wire markers, cable ties, or similar means in at least one location within the enclosure. Exception No. 1: The requirement for grouping or identifying shall not apply if the branch-circuit or feeder conductors enter from a cable or a raceway unique to the circuit that makes the grouping obvious. Exception No. 2: The requirement for grouping or identifying shall not apply where branch-circuit conductors pass through a box or conduit body without a loop as described in 314.16(B)(1) or without a splice or termination. [200.4_(B)](https://2023.antflix.net#200.4_(B))", + "displayTitle": "(B) Multiple Circuits", + "children": [], + "url": "https://2023.antflix.net#200.4_(B)" + } + ], + "url": "https://2023.antflix.net#200.4" + }, + { + "displayTitle": "200.6 Means of Identifying Grounded Conductors", + "children": [ + { + "body": "The insulation of grounded conductors of 6 AWG or smaller shall be identified by one of the following means: A continuous white outer finish.A continuous gray outer finish.Three continuous white or gray stripes along the conductor's entire length on other than green insulation.Conductors with white or gray insulation and colored tracer threads in the braid identifying the source of manufacture.A single-conductor, sunlight-resistant, outdoor-rated cable used as a solidly grounded conductor in photovoltaic power systems, as permitted by 690.31(C)(1), shall be identified at the time of installation by markings at terminations in accordance with 200.6(A)(1) through (A)(4).The grounded conductor of a mineral-insulated, metal-sheathed cable (Type MI) shall be identified at the time of installation by a distinctive white or gray marking at its terminations The marking shall encircle the conductor insulation.Fixture wire shall comply with the requirements for grounded conductor identification in accordance with 402.8.For aerial cable, the identification shall comply with one of the methods in 200.6(A)(1) through (A)(5), or by means of a ridge located on the exterior of the cable so as to identify it. [200.6_(A)](https://2023.antflix.net#200.6_(A))", + "displayTitle": "(A) Sizes 6 AWG or Smaller", + "children": [], + "url": "https://2023.antflix.net#200.6_(A)" + }, + { + "body": "An insulated grounded conductor 4 AWG or larger shall be identified by one of the following means: A continuous white outer finish.A continuous gray outer finish.Three continuous white or gray stripes along the entire length on other than green insulation.At the time of installation, be identified by a distinctive white or gray marking at its terminations. This marking shall encircle the conductor insulation. [200.6_(B)](https://2023.antflix.net#200.6_(B))", + "displayTitle": "(B) Sizes 4 AWG or Larger", + "children": [], + "url": "https://2023.antflix.net#200.6_(B)" + }, + { + "body": "An insulated conductor that is intended for use as a grounded conductor, where contained within a flexible cord, shall be identified by a white or gray outer finish or by methods permitted by 400.22. [200.6_(C)](https://2023.antflix.net#200.6_(C))", + "displayTitle": "(C) Flexible Cords", + "children": [], + "url": "https://2023.antflix.net#200.6_(C)" + }, + { + "body": "If grounded conductors of different nominal voltage systems are installed in the same raceway, cable, box, auxiliary gutter, or other type of enclosure, each grounded conductor shall be identified by nominal voltage system. Identification that distinguishes each nominal voltage system grounded conductor shall be permitted by one of the following means: One nominal voltage system grounded conductor shall have an outer covering conforming to 200.6(A) or (B).The grounded conductor(s) of other nominal voltage systems shall have a different outer covering conforming to 200.6(A) or (B) or by an outer covering of white or gray with a distinguishable colored stripe other than green running along the insulation.Other and different means of identification allowed by 200.6(A) or (B) shall distinguish each nominal voltage system grounded conductor.The means of identification shall be documented in a manner that is readily available or shall be permanently posted where the conductors of different nominal voltage systems originate. [200.6_(D)](https://2023.antflix.net#200.6_(D))", + "displayTitle": "(D) Grounded Conductors of Different Nominal Voltage Systems", + "children": [], + "url": "https://2023.antflix.net#200.6_(D)" + }, + { + "body": "The insulated grounded conductor(s) in a multiconductor cable shall be identified by a continuous white or gray outer finish or by three continuous white or gray stripes on other than green insulation along its entire length. For conductors that are 4 AWG or larger in cables, identification of the grounded conductor shall be permitted to comply with 200.6(B). For multiconductor flat cable with conductors that are 4 AWG or larger, an external ridge shall be permitted to identify the grounded conductor. Exception No. 1: Conductors within multiconductor cables shall be permitted to be re-identified at their terminations at the time of installation by a distinctive white or gray marking or other equally effective means. Exception No. 2: The grounded conductor of a multiconductor varnished-cloth-insulated cable shall be permitted to be identified at its terminations at the time of installation by a distinctive white marking or other equally effective means. Informational Note: The color gray may have been used in the past as an ungrounded conductor. Care should be taken when working on existing systems. [200.6_(E)](https://2023.antflix.net#200.6_(E))", + "displayTitle": "(E) Grounded Conductors of Multiconductor Cables", + "children": [], + "url": "https://2023.antflix.net#200.6_(E)" + } + ], + "url": "https://2023.antflix.net#200.6" + }, + { + "displayTitle": "200.7 Use of Insulation of a White or Gray Color or With Three Continuous White or Gray Stripes", + "children": [ + { + "body": "The following shall be used only for the grounded circuit conductor, unless otherwise permitted in 200.7(B) and (C): A conductor with continuous white or gray coveringA conductor with three continuous white or gray stripes on other than green insulationA marking of white or gray color at the termination [200.7_(A)](https://2023.antflix.net#200.7_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#200.7_(A)" + }, + { + "body": "A conductor with white or gray color insulation or three continuous white stripes or having a marking of white or gray at the termination for circuits of less than 50 volts shall be required to be grounded only in accordance with 250.20(A). [200.7_(B)](https://2023.antflix.net#200.7_(B))", + "displayTitle": "(B) Circuits of Less Than 50 Volts", + "children": [], + "url": "https://2023.antflix.net#200.7_(B)" + }, + { + "body": "The use of insulation that is white or gray or that has three continuous white or gray stripes for other than a grounded conductor for circuits of 50 volts or more shall be permitted only as in the following: If part of a cable assembly that has the insulation permanently reidentified to indicate its use as an ungrounded conductor by marking tape, painting, or other effective means at its termination and at each location where the conductor is visible and accessible. Identification shall encircle the insulation and shall be a color other than white, gray, or green. If used for single-pole, 3-way or 4-way switch loops, the reidentified conductor with white or gray insulation or three continuous white or gray stripes shall be used only for the supply to the switch, but not as a return conductor from the switch to the outlet.A flexible cord having one conductor identified by a white or gray outer finish or three continuous white or gray stripes, or by any other means in accordance with 400.22, that is used for connecting an appliance or equipment in accordance with 400.10. This shall apply to flexible cords connected to outlets whether or not the outlet is supplied by a circuit that has a grounded conductor.Informational Note: The color gray may have been used in the past as an ungrounded conductor. Care should be taken when working on existing systems. [200.7_(C)](https://2023.antflix.net#200.7_(C))", + "displayTitle": "(C) Circuits of 50 Volts or More", + "children": [], + "url": "https://2023.antflix.net#200.7_(C)" + } + ], + "url": "https://2023.antflix.net#200.7" + }, + { + "body": "In devices or utilization equipment with polarized connections, identification of terminals to which a grounded conductor is to be connected shall be white or silver in color. The identification of other terminals shall be of a distinguishable different color. Exception: If the conditions of maintenance and supervision ensure that only qualified persons service the installations, terminals for grounded conductors shall be permitted to be permanently identified at the time of installation by a distinctive white marking or other equally effective means. [200.9](https://2023.antflix.net#200.9)", + "displayTitle": "200.9 Means of Identification of Terminals", + "children": [], + "url": "https://2023.antflix.net#200.9" + }, + { + "displayTitle": "200.10 Identification of Terminals", + "children": [ + { + "body": "All devices, excluding panelboards, provided with terminals for the attachment of conductors and intended for connection to more than one side of the circuit shall have terminals marked for identification, unless the electrical connection of the terminal intended to be connected to the grounded conductor is clearly evident. Exception: Terminal identification shall not be required for devices that have a current rating of over 30 amperes, other than polarized attachment plugs and polarized receptacles for attachment plugs in accordance with 200.10(B). [200.10_(A)](https://2023.antflix.net#200.10_(A))", + "displayTitle": "(A) Device Terminals", + "children": [], + "url": "https://2023.antflix.net#200.10_(A)" + }, + { + "body": "Receptacles, polarized attachment plugs, and cord connectors for plugs and polarized plugs shall have the terminal intended for connection to the grounded conductor identified as follows: Identification shall be by a metal or metal coating that is white or silver in color or by the word \"white\" or the letter \"W\" located adjacent to the identified terminal.If the terminal is not visible, the conductor entrance hole for the connection shall be colored white or marked with the word \"white\" or the letter \"W.\"Informational Note: See 250.126 for identification of wiring device equipment grounding conductor terminals. [200.10_(B)](https://2023.antflix.net#200.10_(B))", + "displayTitle": "(B) Receptacles, Plugs, and Connectors", + "children": [], + "url": "https://2023.antflix.net#200.10_(B)" + }, + { + "body": "For devices with screw shells, the terminal for the grounded conductor shall be the one connected to the screw shell. [200.10_(C)](https://2023.antflix.net#200.10_(C))", + "displayTitle": "(C) Screw Shells", + "children": [], + "url": "https://2023.antflix.net#200.10_(C)" + }, + { + "body": "For screw shell devices with attached leads, the conductor attached to the screw shell shall have a white or gray finish. The outer finish of the other conductor shall be of a solid color that will not be confused with the white or gray finish used to identify the grounded conductor. Informational Note: The color gray may have been used in the past as an ungrounded conductor. Caution should be taken when working on existing systems. [200.10_(D)](https://2023.antflix.net#200.10_(D))", + "displayTitle": "(D) Screw Shell Devices With Leads", + "children": [], + "url": "https://2023.antflix.net#200.10_(D)" + }, + { + "body": "Appliances that have a single-pole switch or a single-pole overcurrent device in the line or any line-connected screw shell lampholders, and that are to be connected by (1) a permanent wiring method or (2) field-installed attachment plugs and cords with three or more wires (including the equipment grounding conductor), shall have means to identify the terminal for the grounded circuit conductor (if any). [200.10_(E)](https://2023.antflix.net#200.10_(E))", + "displayTitle": "(E) Appliances", + "children": [], + "url": "https://2023.antflix.net#200.10_(E)" + } + ], + "url": "https://2023.antflix.net#200.10" + }, + { + "body": "No grounded conductor shall be attached to any terminal or lead so as to reverse the designated polarity. [200.11](https://2023.antflix.net#200.11)", + "displayTitle": "200.11 Polarity of Connections", + "children": [], + "url": "https://2023.antflix.net#200.11" + } + ], + "url": "https://2023.antflix.net#200" + }, + { + "displayTitle": "Article 210 Branch Circuits Not Over 1000 Volts AC, 1500 Volts DC, Nominal", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_2_I" + }, + { + "body": "This article provides the general requirements for branch circuits not over 1000 volts ac, 1500 volts dc, nominal. Informational Note: See Part II of Article 235 for requirements for branch circuits over 1000 volts ac, 1500 volts dc, nominal. [210.1](https://2023.antflix.net#210.1)", + "displayTitle": "210.1 Scope", + "children": [], + "url": "https://2023.antflix.net#210.1" + }, + { + "body": "The following shall not be reconditioned: Equipment that provides ground-fault circuit-interrupter protection for personnelEquipment that provides arc-fault circuit-interrupter protection [210.2](https://2023.antflix.net#210.2)", + "displayTitle": "210.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#210.2" + }, + { + "body": "Table 210.3 lists references for specific equipment and applications not located in Chapters 5, 6, and 7 that amend or supplement the requirements of this article. Table 210.3 Specific-Purpose Branch Circuits Equipment Article Section Air-conditioning and refrigerating equipment 440.6, 440.31, and 440.32 Busways 368.17 Central heating equipment other than fixed electric space-heating equipment 422.12 Fixed electric heating-equipment for pipelines and vessels 427.4 Fixed electric space-heating equipment 424.4 Fixed outdoor electrical deicing and snow-melting equipment 426.4 Infrared lamp industrial heating equipment 422.48 and 424.3 Motors, motor circuits, and controllers 430 Switchboards and panelboards 408.52 [210.3](https://2023.antflix.net#210.3)", + "displayTitle": "210.3 Other Articles for Specific-Purpose Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.3" + }, + { + "displayTitle": "210.4 Multiwire Branch Circuits", + "children": [ + { + "body": "Branch circuits recognized by this article shall be permitted as multiwire circuits. A multiwire circuit shall be permitted to be considered as multiple circuits. Except as permitted in 300.3(B)(4), all conductors of a multiwire branch circuit shall originate from the equipment containing the branch-circuit overcurrent protective device or protective devices. Informational Note No. 1: A 3-phase, 4-wire, wye-connected power system used to supply power to nonlinear loads might necessitate that the power system design allow for the possibility of high harmonic currents on the neutral conductor. Informational Note No. 2: See 300.13(B) for continuity of grounded conductors on multiwire circuits. [210.4_(A)](https://2023.antflix.net#210.4_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#210.4_(A)" + }, + { + "body": "Each multiwire branch circuit shall be provided with a means that will simultaneously disconnect all ungrounded conductors at the point where the branch circuit originates. Informational Note: See 240.15(B) for information on the use of single-pole circuit breakers as the disconnecting means. [210.4_(B)](https://2023.antflix.net#210.4_(B))", + "displayTitle": "(B) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#210.4_(B)" + }, + { + "body": "Multiwire branch circuits shall supply only line-to-neutral loads. Exception No. 1: A multiwire branch circuit that supplies only one utilization equipment shall be permitted to supply line-to-line loads. Exception No. 2: A multiwire branch circuit shall be permitted to supply line-to-line loads if all ungrounded conductors of the multiwire branch circuit are opened simultaneously by the branch-circuit overcurrent device. [210.4_(C)](https://2023.antflix.net#210.4_(C))", + "displayTitle": "(C) Line-to-Neutral Loads", + "children": [], + "url": "https://2023.antflix.net#210.4_(C)" + }, + { + "body": "The ungrounded and grounded circuit conductors of each multiwire branch circuit shall be grouped in accordance with 200.4(B). [210.4_(D)](https://2023.antflix.net#210.4_(D))", + "displayTitle": "(D) Grouping", + "children": [], + "url": "https://2023.antflix.net#210.4_(D)" + } + ], + "url": "https://2023.antflix.net#210.4" + }, + { + "displayTitle": "210.5 Identification for Branch Circuits", + "children": [ + { + "body": "The grounded conductor of a branch circuit shall be identified in accordance with 200.6. [210.5_(A)](https://2023.antflix.net#210.5_(A))", + "displayTitle": "(A) Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#210.5_(A)" + }, + { + "body": "The equipment grounding conductor shall be identified in accordance with 250.119. [210.5_(B)](https://2023.antflix.net#210.5_(B))", + "displayTitle": "(B) Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#210.5_(B)" + }, + { + "body": "Ungrounded conductors shall be identified in accordance with 210.5(C)(1) or (2), as applicable. [210.5_(C)](https://2023.antflix.net#210.5_(C))", + "displayTitle": "(C) Identification of Ungrounded Conductors", + "children": [ + { + "body": "Where the premises wiring system has branch circuits supplied from more than one nominal voltage system, each ungrounded conductor of a branch circuit shall be identified by phase or line and by nominal voltage system at all termination, connection, and splice points in accordance with 210.5(C)(1)(a) and (C)(1)(b). Different systems within the same premises that have the same nominal voltage shall be permitted to use the same identification. Means of Identification. The means of identification shall be permitted to be by separate color coding, marking tape, tagging, or other approved means.Posting of Identification Means. The method used for conductors originating within each branch-circuit panelboard or similar branch-circuit distribution equipment shall be documented in a manner that is readily available or shall be permanently posted at each branch-circuit panelboard or similar branch-circuit distribution equipment. The label shall be of sufficient durability to withstand the environment involved and shall not be handwritten.Exception: In existing installations where a voltage system(s) already exists and a different voltage system is being added, it shall be permissible to mark only the new system voltage. Existing unidentified systems shall not be required to be identified at each termination, connection, and splice point in accordance with 210.5(C)(1)(a) and (C)(1)(b). Labeling shall be required at each voltage system distribution equipment to identify that only one voltage system has been marked for a new system(s). The new system label(s) shall include the words \"other unidentified systems exist on the premises.\" [210.5_(C)_(1)](https://2023.antflix.net#210.5_(C)_(1))", + "displayTitle": "(1) Branch Circuits Supplied From More Than One Nominal Voltage System", + "children": [], + "url": "https://2023.antflix.net#210.5_(C)_(1)" + }, + { + "body": "Where a branch circuit is supplied from a dc system operating at more than 60 volts, each ungrounded conductor of 4 AWG or larger shall be identified by polarity at all termination, connection, and splice points by marking tape, tagging, or other approved means; each ungrounded conductor of 6 AWG or smaller shall be identified by polarity at all termination, connection, and splice points in compliance with 210.5(C)(2)(a) and (b). The identification methods utilized for conductors originating within each branch-circuit panelboard or similar branch-circuit distribution equipment shall be documented in a manner that is readily available or shall be permanently posted at each branch-circuit panelboard or similar branch-circuit distribution equipment. Positive Polarity, Sizes 6 AWG or Smaller. Where the positive polarity of a dc system does not serve as the connection point for the grounded conductor, each positive ungrounded conductor shall be identified by one of the following means:A continuous red outer finishA continuous red stripe durably marked along the conductor's entire length on insulation of a color other than green, white, gray, or blackImprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray, or black and repeated at intervals not exceeding 610 mm (24 in.) in accordance with 310.8(B)An approved permanent marking means such as sleeving or shrink-tubing that is suitable for the conductor size, at all termination, connection, and splice points, with imprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray, or blackNegative Polarity, Sizes 6 AWG or Smaller. Where the negative polarity of a dc system does not serve as the connection point for the grounded conductor, each negative ungrounded conductor shall be identified by one of the following means:A continuous black outer finishA continuous black stripe durably marked along the conductor's entire length on insulation of a color other than green, white, gray, or redImprinted minus signs (\u2014) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red and repeated at intervals not exceeding 610 mm (24 in.) in accordance with 310.8(B)An approved permanent marking means such as sleeving or shrink-tubing that is suitable for the conductor size, at all termination, connection, and splice points, with imprinted minus signs (\u2014) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red [210.5_(C)_(2)](https://2023.antflix.net#210.5_(C)_(2))", + "displayTitle": "(2) Branch Circuits Supplied From Direct-Current Systems", + "children": [], + "url": "https://2023.antflix.net#210.5_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#210.5_(C)" + } + ], + "url": "https://2023.antflix.net#210.5" + }, + { + "body": "The nominal voltage of branch circuits shall not exceed the values permitted by 210.6(A) through (D). [210.6](https://2023.antflix.net#210.6)", + "displayTitle": "210.6 Branch-Circuit Voltage Limitations", + "children": [ + { + "body": "In dwelling units and guest rooms or guest suites of hotels, motels, and similar occupancies, the voltage shall not exceed 120 volts, nominal, between conductors that supply the terminals of the following: LuminairesCord-and-plug-connected loads 1440 volt-amperes, nominal, or less or less than 1/4 hp [210.6_(A)](https://2023.antflix.net#210.6_(A))", + "displayTitle": "(A) Occupancy Limitation", + "children": [], + "url": "https://2023.antflix.net#210.6_(A)" + }, + { + "body": "Circuits not exceeding 120 volts, nominal, between conductors shall be permitted to supply the following: The terminals of lampholders applied within their voltage ratingsAuxiliary equipment of electric-discharge lampsInformational Note: See 410.137 for auxiliary equipment limitations.Cord-and-plug-connected or permanently connected utilization equipment [210.6_(B)](https://2023.antflix.net#210.6_(B))", + "displayTitle": "(B) 120 Volts Between Conductors", + "children": [], + "url": "https://2023.antflix.net#210.6_(B)" + }, + { + "body": "Circuits exceeding 120 volts, nominal, between conductors and not exceeding 277 volts, nominal, to ground shall be permitted to supply cord-and-plug-connected or permanently connected utilization equipment, or the following types of listed luminaires: Electric-discharge luminaires with integral ballastsLED luminaires with LED drivers between the branch circuit and the lampholdersIncandescent or LED luminaires, equipped with medium-base or smaller screw shell lampholders, where the lampholders are supplied at 120 volts or less from the output of a stepdown autotransformer, LED driver, or other type of power supply that is an integral component of the luminaireInformational Note No. 1: See 410.90 for requirements regarding the connection of screw shell lampholders to grounded conductors.Luminaires equipped with mogul-base screw shell lampholdersLuminaires equipped with lampholders, other than the screw shell type, when used within the voltage ratings of their lampholdersLuminaires without lampholdersInformational Note No. 2: Luminaires with nonserviceable LEDs are examples of luminaires without lampholders.Auxiliary equipment of electric-discharge or LED-type lampsInformational Note No. 3: See 410.137 for auxiliary equipment limitations.Luminaires converted with listed retrofit kits incorporating integral LED light sources or accepting LED lamps that also conform with 210.6(C)(1), (C)(2), (C)(3), (C)(4), or (C)(5) [210.6_(C)](https://2023.antflix.net#210.6_(C))", + "displayTitle": "(C) 277 Volts to Ground", + "children": [], + "url": "https://2023.antflix.net#210.6_(C)" + }, + { + "body": "Circuits exceeding 277 volts, nominal, to ground and not exceeding 1000 volts ac or 1500 volts dc, nominal, between conductors shall be permitted to supply the following: The auxiliary equipment of electric-discharge lamps mounted in permanently installed luminaires where the luminaires are mounted in accordance with one of the following:Not less than a height of 6.7 m (22 ft) on poles or similar structures for the illumination of outdoor areas such as highways, roads, bridges, athletic fields, or parking lotsNot less than a height of 5.5 m (18 ft) on other structures such as tunnelsInformational Note: See 410.137 for auxiliary equipment limitations.Cord-and-plug-connected or permanently connected utilization equipment other than luminairesLuminaires powered from direct-current systems where either of the following apply:The luminaire contains a listed, dc-rated ballast that provides isolation between the dc power source and the lamp circuit and protection from electric shock when changing lamps.The luminaire contains a listed, dc-rated ballast and has no provision for changing lamps.Exception No. 1 to (B), (C), and (D): For lampholders of infrared industrial heating appliances as provided in 425.14.Exception No. 2 to (B), (C), and (D): For railway properties as described in 110.19. [210.6_(D)](https://2023.antflix.net#210.6_(D))", + "displayTitle": "(D) 1000 Volts AC or 1500 Volts DC Between Conductors", + "children": [], + "url": "https://2023.antflix.net#210.6_(D)" + } + ], + "url": "https://2023.antflix.net#210.6" + }, + { + "body": "If two or more branch circuits supply devices or equipment on the same yoke or mounting strap, a means to simultaneously disconnect the ungrounded supply conductors shall be provided at the point at which the branch circuits originate. [210.7](https://2023.antflix.net#210.7)", + "displayTitle": "210.7 Multiple Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.7" + }, + { + "body": "A listed Class A GFCI shall provide protection in accordance with 210.8(A) through (F). The GFCI shall be installed in a readily accessible location. Informational Note: See 215.9 for GFCI protection on feeders. For the purposes of this section, the distance from receptacles shall be measured as the shortest path the power supply cord connected to the receptacle would follow without piercing a floor, wall, ceiling, or fixed barrier. [210.8](https://2023.antflix.net#210.8)", + "displayTitle": "210.8 Ground-Fault Circuit-Interrupter Protection for Personnel", + "children": [ + { + "body": "All 125-volt through 250-volt receptacles installed in the following locations and supplied by single-phase branch circuits rated 150 volts or less to ground shall have ground-fault circuit-interrupter protection for personnel: BathroomsGarages and also accessory buildings that have a floor located at or below grade level not intended as habitable rooms and limited to storage areas, work areas, and areas of similar useOutdoorsCrawl spaces - at or below grade levelBasementsKitchensAreas with sinks and permanent provisions for food preparation, beverage preparation, or cookingSinks - where receptacles are installed within 1.8 m (6 ft) from the top inside edge of the bowl of the sinkBoathousesBathtubs or shower stalls - where receptacles are installed within 1.8 m (6 ft) of the outside edge of the bathtub or shower stallLaundry areasIndoor damp and wet locationsException No. 1: Receptacles that are not readily accessible and are supplied by a branch circuit dedicated to electric snow-melting, deicing, or pipeline and vessel healing equipment shall be permitted to be installed in accordance with 426.28 or 427.22, as applicable.Exception No. 2: A receptacle supplying only a permanently installed premises security system shall be permitted to omit ground-fault circuit-interrupter protection.Exception No. 3: Listed weight-supporting ceiling receptacles (WSCR) utilized in combination with compatible weight-supporting attachment fittings (WSAF) installed for the purpose of supporting a ceiling luminaire or ceiling-suspended fan shall be permitted to omit ground-fault circuit-interrupter protection. If a general-purpose convenience receptacle is integral to the ceiling luminaire or ceiling-suspended fan, GFCI protection shall be provided.Exception No. 4: Factory-installed receptacles that are not readily accessible and are mounted internally to bathroom exhaust fan assemblies shall not require GFCI protection unless required by the installation instructions or listing.Informational Note: See 760.41(B) and 760.121(B) for power supply requirements for fire alarm systems. [210.8_(A)](https://2023.antflix.net#210.8_(A))", + "displayTitle": "(A) Dwelling Units", + "children": [], + "url": "https://2023.antflix.net#210.8_(A)" + }, + { + "body": "All 125-volt through 250-volt receptacles supplied by single-phase branch circuits rated 150 volts or less to ground, 50 amperes or less, and all receptacles supplied by three-phase branch circuits rated 150 volts or less to ground, 100 amperes or less, installed in the following locations shall be provided with GFCI protection: BathroomsKitchensAreas with sinks and permanent provisions for food preparation, beverage preparation, or cookingBuffet serving areas with permanent provisions for food serving, beverage serving, or cookingRooftopsOutdoorsSinks where receptacles or cord-and-plug-connected fixed or stationary appliances are installed within 1.8 m (6 ft) from the top inside edge of the bowl of the sinkIndoor damp or wet locationsLocker rooms with associated showering facilitiesGarages, accessory buildings, service bays, and similar areas other than vehicle exhibition halls and showroomsCrawl spaces at or below grade levelUnfinished areas of basementsAquariums, bait wells, and similar open aquatic vessels or containers, such as tanks or bowls, where receptacles are installed within 1.8 m (6 ft.) from the top inside edge or rim or from the conductive support framing of the vessel or containerLaundry areasBathtubs and shower stalls where receptacles are installed within 1.8 m (6 ft) of the outside edge of the bathtub or shower stallException No. 1: Receptacles that are not readily accessible and are supplied by a branch circuit dedicated to electric snow-melting, deicing, or pipeline and vessel heating equipment shall be permitted to be installed in accordance with 426.28 or 427.22, as applicable.Exception No. 2: Receptacles on rooftops shall not be required to be readily accessible other than from the rooftop.Exception No. 3: Receptacles or cord-and-plug-connected fixed and stationary appliances installed within 1.8 m (6 ft) from the top inside edge of a bowl of a sink shall not be required to be GFCI protected in industrial establishments where the conditions of maintenance and supervision ensure that only qualified personnel are involved, an assured equipment grounding conductor program in accordance with 590.6(B)(2) shall be permitted for only those receptacle outlets used to supply equipment that would create a greater hazard if power is interrupted or that has a design not compatible with GFCI protection.Exception No. 4: Receptacles or cord-and-plug-connected fixed and stationary appliances installed within 1.8 m (6 ft) from the top inside edge of a bowl of a sink shall not be required to be GFCI protected in industrial laboratories where the receptacles are used to supply equipment if removal of power would introduce a greater hazard.Exception No. 5: Receptacles located in patient bed locations of Category 2 (general care) or Category 1 (critical care) spaces of health care facilities shall be permitted to comply with 517.21.Exception No. 6: Listed weight-supporting ceiling receptacles (WSCR) utilized in combination with compatible weight-supporting attachment fittings (WSAF) installed for the purpose of serving a ceiling luminaire or ceiling-suspended fan shall be permitted to omit GFCI protection. If a general-purpose convenience receptacle is integral to the ceiling luminaire or ceiling-suspended fan, GFCI protection shall be provided. [210.8_(B)](https://2023.antflix.net#210.8_(B))", + "displayTitle": "(B) Other Than Dwelling Units", + "children": [], + "url": "https://2023.antflix.net#210.8_(B)" + }, + { + "body": "GFCI protection shall be provided for lighting outlets not exceeding 120 volts installed in crawl spaces. [210.8_(C)](https://2023.antflix.net#210.8_(C))", + "displayTitle": "(C) Crawl Space Lighting Outlets", + "children": [], + "url": "https://2023.antflix.net#210.8_(C)" + }, + { + "body": "GFCI protection shall be provided for the branch circuit or outlet supplying the following appliances rated 150 volts or less to ground and 60 amperes or less, single- or 3-phase: Automotive vacuum machinesDrinking water coolers and bottle fill stationsHigh-pressure spray washing machinesTire inflation machinesVending machinesSump pumpsDishwashersElectric rangesWall-mounted ovensCounter-mounted cooking unitsClothes dryersMicrowave ovens [210.8_(D)](https://2023.antflix.net#210.8_(D))", + "displayTitle": "(D) Specific Appliances", + "children": [], + "url": "https://2023.antflix.net#210.8_(D)" + }, + { + "body": "GFCI protection shall be provided for the receptacles required by 210.63. [210.8_(E)](https://2023.antflix.net#210.8_(E))", + "displayTitle": "(E) Equipment Requiring Servicing", + "children": [], + "url": "https://2023.antflix.net#210.8_(E)" + }, + { + "body": "For dwellings, all outdoor outlets, other than those covered in 210.8(A), Exception No. 1, including outlets installed in the following locations, and supplied by single-phase branch circuits rated 150 volts or less to ground, 50 amperes or less, shall be provided with GFCI protection: Garages that have floors located at or below grade levelAccessory buildingsBoathousesIf equipment supplied by an outlet covered under the requirements of this section is replaced, the outlet shall be supplied with GFCI protection.Exception No. 1: GFCI protection shall not be required on lighting outlets other than those covered in 210.8(C).Exception No. 2: GFCI protection shall not be required for listed HVAC equipment. This exception shall expire September 1, 2026. [210.8_(F)](https://2023.antflix.net#210.8_(F))", + "displayTitle": "(F) Outdoor Outlets", + "children": [], + "url": "https://2023.antflix.net#210.8_(F)" + } + ], + "url": "https://2023.antflix.net#210.8" + }, + { + "body": "Branch circuits shall not be derived from autotransformers unless the circuit supplied has a grounded conductor that is electrically connected to a grounded conductor of the system supplying the autotransformer. Exception No. 1: An autotransformer shall be permitted without the connection to a grounded conductor where transforming from a nominal 208 volts to a nominal 240-volt supply or similarly from 240 volts to 208 volts. Exception No. 2: In industrial occupancies, where conditions of maintenance and supervision ensure that only qualified persons service the installation, autotransformers shall be permitted to supply nominal 600-volt loads from nominal 480-volt systems, and 480-volt loads from nominal 600-volt systems, without the connection to a similar grounded conductor. [210.9](https://2023.antflix.net#210.9)", + "displayTitle": "210.9 Circuits Derived From Autotransformers", + "children": [], + "url": "https://2023.antflix.net#210.9" + }, + { + "body": "Two-wire dc circuits and ac circuits of two or more ungrounded conductors shall be permitted to be tapped from the ungrounded conductors of circuits that have a grounded neutral conductor. Switching devices in each tapped circuit shall have a pole in each ungrounded conductor. All poles of multipole switching devices shall manually switch together where such switching devices also serve as a disconnecting means as required by the following: 410.93 for double-pole switched lampholders410.104(B) for electric-discharge lamp auxiliary equipment switching devices422.31 (B) for an appliance424.20 for a fixed electric space-heating unit426.51 for electric deicing and snow-melting equipment430.85 for a motor controller430.103 for a motor [210.10](https://2023.antflix.net#210.10)", + "displayTitle": "210.10 Ungrounded Conductors Tapped From Grounded Systems", + "children": [], + "url": "https://2023.antflix.net#210.10" + }, + { + "body": "Branch circuits for lighting and for appliances, including motor-operated appliances, shall be provided to supply the loads calculated in accordance with 220.10. In addition, branch circuits shall be provided for specific loads not covered by 220.10 where required elsewhere in this Code and for dwelling unit loads as specified in 210.11(C). [210.11](https://2023.antflix.net#210.11)", + "displayTitle": "210.11 Branch Circuits Required", + "children": [ + { + "body": "The minimum number of branch circuits shall be determined from the total calculated load and the size or rating of the circuits used. In all installations, the number of circuits shall be sufficient to supply the load served. In no case shall the load on any circuit exceed the maximum specified by 220.11. [210.11_(A)](https://2023.antflix.net#210.11_(A))", + "displayTitle": "(A) Number of Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.11_(A)" + }, + { + "body": "Where the load is calculated on the basis of volt-amperes per square meter or per square foot, the wiring system up to and including the branch-circuit panelboard(s) shall be provided to serve not less than the calculated load. This load shall be evenly proportioned among multioutlet branch circuits within the panelboard(s). Branch-circuit overcurrent devices and circuits shall be required to be installed only to serve the connected load. [210.11_(B)](https://2023.antflix.net#210.11_(B))", + "displayTitle": "(B) Load Evenly Proportioned Among Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.11_(B)" + }, + { + "displayTitle": "(C) Dwelling Units", + "children": [ + { + "body": "In addition to the number of branch circuits required by other parts of this section, two or more 20-ampere small-appliance branch circuits shall be provided for all receptacle outlets specified by 210.52(B). [210.11_(C)_(1)](https://2023.antflix.net#210.11_(C)_(1))", + "displayTitle": "(1) Small-Appliance Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.11_(C)_(1)" + }, + { + "body": "In addition to the number of branch circuits required by other parts of this section, at least one additional 20-ampere branch circuit shall be provided to supply the laundry receptacle outlet(s) required by 210.52(F). This circuit shall have no other outlets. [210.11_(C)_(2)](https://2023.antflix.net#210.11_(C)_(2))", + "displayTitle": "(2) Laundry Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.11_(C)_(2)" + }, + { + "body": "In addition to the number of branch circuits required by other parts of this section, one or more 120-volt, 20-ampere branch circuit shall be provided to supply bathroom(s) receptacle outlet(s) required by 210.52(D) and any countertop and similar work surface receptacle outlets. Such circuits shall have no other outlets.\nException: Where the 20-ampere circuit supplies a single bathroom, outlets for other equipment within the same bathroom shall be permitted to be supplied in accordance with 210.23(B)(1) and (B)(2). [210.11_(C)_(3)](https://2023.antflix.net#210.11_(C)_(3))", + "displayTitle": "(3) Bathroom Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.11_(C)_(3)" + }, + { + "body": "In addition to the number of branch circuits required by other parts of this section, at least one 120-volt, 20-ampere branch circuit shall be installed to supply receptacle outlets, including those required by 210.52(G)(1) for attached garages and in detached garages with electric power. This circuit shall have no other outlets.\nAdditional branch circuits rated 15 amperes or greater shall be permitted to serve receptacle outlets other than those required by 210.52(G)(1).\nException No. 1: This circuit shall be permitted to supply outdoor receptacle outlets.\nException No. 2: Where the 20-ampere circuit supplies a single vehicle bay garage, outlets for other equipment within the same garage shall be permitted to be supplied in accordance with 210.23(B)(1) and (B)(2). [210.11_(C)_(4)](https://2023.antflix.net#210.11_(C)_(4))", + "displayTitle": "(4) Garage Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.11_(C)_(4)" + } + ], + "url": "https://2023.antflix.net#210.11_(C)" + } + ], + "url": "https://2023.antflix.net#210.11" + }, + { + "body": "Arc-fault circuit-interrupter (AFCI) protection shall be installed in accordance with 210.12(B) through (E) by any of the means described in 210.12(A)(1) through (A)(6). The AFCI shall be listed and installed in a readily accessible location. [210.12](https://2023.antflix.net#210.12)", + "displayTitle": "210.12 Arc-Fault Circuit-Interrupter Protection", + "children": [ + { + "body": "AFCI protection shall be provided by any of the following means: A listed combination-type AFCI installed to provide protection of the entire branch circuit.A listed branch/feeder-type AFCI installed at the origin of the branch circuit in combination with a listed outlet branch-circuit-type AFCI installed on the branch circuit at the first outlet box, which shall be marked to indicate that it is the first outlet of the branch circuit.A listed supplemental arc protection circuit breaker installed at the origin of the branch circuit in combination with a listed outlet branch-circuit-type AFCI installed on the branch circuit at the first outlet box if all of the following conditions are met:The branch-circuit wiring shall be continuous from the branch-circuit overcurrent device to the outlet branch-circuit AFCI.The maximum length of the branch-circuit wiring from the branch-circuit overcurrent device to the first outlet shall not exceed 15.2 m (50 ft) for a 14 AWG conductor or 21.3 m (70 ft) for a 12 AWG conductor.The first outlet box shall be marked to indicate that it is the first outlet of the branch circuit.A listed outlet branch-circuit-type AFCI installed on the branch circuit at the first outlet in combination with a listed branch-circuit overcurrent protective device if all of the following conditions are met:The branch-circuit wiring shall be continuous from the branch-circuit overcurrent device to the outlet branch-circuit AFCI.The maximum length of the branch-circuit wiring from the branch-circuit overcurrent device to the first outlet shall not exceed 15.2 m (50 ft) for a 14 AWG conductor or 21.3 m (70 ft) for a 12 AWG conductor.The first outlet box shall be marked to indicate that it is the first outlet of the branch circuit.The combination of the branch-circuit overcurrent device and outlet branch-circuit AFCI shall be identified as meeting the requirements for a system combination-type AFCI and listed as such.If metal raceway, metal wireways, metal auxiliary gutters, or Type MC or Type AC cable meeting the applicable requirements of 250.118, with metal boxes, metal conduit bodies, and metal enclosures are installed for the portion of the branch circuit between the branch-circuit overcurrent device and the first outlet, it shall be permitted to install a listed outlet branch-circuit-type AFCI at the first outlet to provide protection for the remaining portion of the branch circuit.Where a listed metal or nonmetallic conduit or tubing or Type MC cable is encased in not less than 50 mm (2 in.) of concrete for the portion of the branch circuit between the branch-circuit overcurrent device and the first outlet, it shall be permitted to install a listed outlet branch-circuit-type AFCI at the first outlet to provide protection for the remaining portion of the branch circuit.Informational Note: See UL 1699-2011, Standard for Arc-Fault Circuit-Interrupters, for information on combination-type and branch/feeder-type AFCI devices. See UL Subject 1699A, Outline of Investigation for Outlet Branch Circuit Arc-Fault Circuit-Interrupters, for information on outlet branch-circuit type AFCI devices. See UL Subject 1699C, Outline of Investigation for System Combination Arc-Fault Circuit Interrupters, for information on system combination AFCIs. [210.12_(A)](https://2023.antflix.net#210.12_(A))", + "displayTitle": "(A) Means of Protection", + "children": [], + "url": "https://2023.antflix.net#210.12_(A)" + }, + { + "body": "All 120-volt, single-phase, 10-, 15-, and 20-ampere branch circuits supplying outlets or devices installed in the following locations shall be protected by any of the means described in 210.12(A)(1) through (A)(6): KitchensFamily roomsDining roomsLiving roomsParlorsLibrariesDensBedroomsSunroomsRecreation roomsClosetsHallwaysLaundry areasSimilar areasException No. 1: AFCI protection shall not be required for an individual branch circuit supplying a fire alarm system installed in accordance with 760.41(B) or 760.121(B). The branch circuit shall be installed in a metal raceway, metal auxiliary gutter, steel-armored cable, or Type MC or Type AC cable meeting the applicable requirements of 250.118, with metal boxes, conduit bodies, and enclosures.Exception No. 2: AFCI protection shall not be required for the individual branch circuit supplying an outlet for arc welding equipment in a dwelling unit until January 1, 2025.Informational Note No. 1: See NFPA 72-2022, National Fire Alarm and Signaling Code, 29.9.4(5), for information on secondary power source requirements for smoke alarms installed in dwelling units.Informational Note No. 2: See 760.41(B) and 760.121(B) for power source requirements for fire alarm systems. [210.12_(B)](https://2023.antflix.net#210.12_(B))", + "displayTitle": "(B) Dwelling Units", + "children": [], + "url": "https://2023.antflix.net#210.12_(B)" + }, + { + "body": "All 120-volt, single-phase, 10-, 15-, and 20-ampere branch circuits supplying outlets or devices installed in the following locations shall be protected by any of the means described in 210.12(A)(1) through (A)(6): BedroomsLiving roomsHallwaysClosetsBathroomsSimilar rooms [210.12_(C)](https://2023.antflix.net#210.12_(C))", + "displayTitle": "(C) Dormitory Units", + "children": [], + "url": "https://2023.antflix.net#210.12_(C)" + }, + { + "body": "All 120-volt, single-phase, 10-, 15-, and 20-ampere branch circuits supplying outlets or devices installed in the following locations shall be protected by any of the means described in 210.12(A)(1) through (A)(6): Guest rooms and guest suites of hotels and motelsAreas used exclusively as patient sleeping rooms in nursing homes and limited-care facilitiesAreas designed for use exclusively as sleeping quarters in fire stations, police stations, ambulance stations, rescue stations, ranger stations, and similar locations [210.12_(D)](https://2023.antflix.net#210.12_(D))", + "displayTitle": "(D) Other Occupancies", + "children": [], + "url": "https://2023.antflix.net#210.12_(D)" + }, + { + "body": "If branch-circuit wiring for any of the areas specified in 210.12(B), (C), or (D) is modified, replaced, or extended, the branch circuit shall be protected by one of the following: By any of the means described in 210.12(A)(1) through (A)(6)A listed outlet branch-circuit-type AFCI located at the first receptacle outlet of the existing branch circuitException: AFCI protection shall not be required where the extension of the existing branch-circuit conductors is not more than 1.8 m (6 ft) and does not include any additional outlets or devices, other than splicing devices. This measurement shall not include the conductors inside an enclosure, cabinet, or junction box. [210.12_(E)](https://2023.antflix.net#210.12_(E))", + "displayTitle": "(E) Branch Circuit Wiring Extensions, Modifications, or Replacements", + "children": [], + "url": "https://2023.antflix.net#210.12_(E)" + } + ], + "url": "https://2023.antflix.net#210.12" + }, + { + "body": "Each branch-circuit disconnecting means rated 1000 amperes or more and installed on solidly grounded wye electrical systems of more than 150 volts to ground, but not exceeding 1000 volts phase-to-phase, shall be provided with ground-fault protection of equipment in accordance with 230.95. Informational Note: See 517.17 for requirements on buildings that contain health care occupancies. Exception No. 1: This section shall not apply to a disconnecting means for a continuous industrial process where a nonorderly shutdown will introduce additional or increased hazards. Exception No. 2: This section shall not apply if ground-fault protection of equipment is provided on the supply side of the branch circuit and on the load side of any transformer supplying the branch circuit. [210.13](https://2023.antflix.net#210.13)", + "displayTitle": "210.13 Ground-Fault Protection of Equipment", + "children": [], + "url": "https://2023.antflix.net#210.13" + }, + { + "body": "Guest rooms and guest suites in the following occupancies that are provided with permanent provisions for cooking shall have branch circuits installed to meet the rules for dwelling units: HotelsMotelsAssisted living facilitiesInformational Note No. 1: See 210.11(C)(2) and 210.52(F), Exception No. 2, for information on laundry branch circuits and receptacle outlets.Informational Note No. 2: See NFPA 101-2021, Life Safety Code, 3.3.198.12 and A.3.3.198.12(5), for the definition of assisted living facilities. [210.17](https://2023.antflix.net#210.17)", + "displayTitle": "210.17 Guest Rooms and Guest Suites", + "children": [], + "url": "https://2023.antflix.net#210.17" + }, + { + "displayTitle": "Part II Branch-Circuit Ratings", + "children": [], + "url": "https://2023.antflix.net#divider_2_II" + }, + { + "body": "Branch circuits recognized by this article shall be rated in accordance with the maximum permitted ampere rating or setting of the overcurrent device. The rating for other than individual branch circuits shall be 10, 15, 20, 30, 40, and 50 amperes. Where conductors of higher ampacity are used for any reason, the ampere rating or setting of the specified overcurrent device shall determine the circuit rating. Exception No. 1: Multioutlet branch circuits greater than 50 amperes shall be permitted to supply nonlighting outlet loads in locations where conditions of maintenance and supervision ensure that only qualified persons service the equipment. Exception No. 2: Branch circuits rated 10 amperes shall not supply receptacle outlets. [210.18](https://2023.antflix.net#210.18)", + "displayTitle": "210.18 Rating", + "children": [], + "url": "https://2023.antflix.net#210.18" + }, + { + "body": "Branch-circuit conductors for circuits not exceeding 1000 volts ac or 1500 volts dc shall be sized in accordance with 210.19(A) through (D). Informational Note: Conductors for branch circuits as defined in Article 100, sized to prevent a voltage drop exceeding 3 percent at the farthest outlet of power, heating, and lighting loads, or combinations of such loads, and where the maximum total voltage drop on both feeders and branch circuits to the farthest outlet does not exceed 5 percent, provide reasonable efficiency of operation. See 215.21(A)(2). Informational. Note No. 2, for information on voltage drop on feeder conductors. [210.19](https://2023.antflix.net#210.19)", + "displayTitle": "210.19 Conductors - Minimum Ampacity and Size", + "children": [ + { + "body": "Branch-circuit conductors shall have an ampacity not less than the larger of the following and comply with 110.14(C) for equipment terminations: Where a branch circuit supplies continuous loads or any combination of continuous and noncontinuous loads, the minimum branch-circuit conductor size shall have an ampacity not less than the noncontinuous load plus 125 percent of the continuous load in accordance with 310.14.Exception to (1): If the assembly, including the overcurrent devices protecting the branch circuits, is listed for operation at 100 percent of its rating, the ampacity of the branch-circuit conductors shall be permitted to be not less than the sum of the continuous load plus the noncontinuous load in accordance with 110.14(C).The minimum branch-circuit conductor size shall have an ampacity not less than the maximum load to be served after the application of any adjustment or correction factors in accordance with 310.15.Exception to (1) and (2): Where a portion of a branch circuit is connected at both its supply and load ends to separately installed pressure connections as covered in 110.14(C)(2), an allowable ampacity in accordance with 310.15 not less than the sum of the continuous load plus the noncontinuous load shall be permitted. No portion of a branch circuit installed under this exception shall extend into an enclosure containing either the branch-circuit supply or the branch-circuit load terminations. [210.19_(A)](https://2023.antflix.net#210.19_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#210.19_(A)" + }, + { + "body": "Conductors of branch circuits supplying more than one receptacle for cord-and-plug-connected portable loads shall have an ampacity of not less than the rating of the branch circuit. [210.19_(B)](https://2023.antflix.net#210.19_(B))", + "displayTitle": "(B) Branch Circuits With More Than One Receptacle", + "children": [], + "url": "https://2023.antflix.net#210.19_(B)" + }, + { + "body": "Branch-circuit conductors supplying household ranges, wall-mounted ovens, counter-mounted cooking units, and other household cooking appliances shall have an ampacity not less than the rating of the branch circuit and not less than the maximum load to be served. For ranges of 83/4 kW or more rating, the minimum branch-circuit rating shall be 40 amperes. Exception No. 1: Conductors tapped from a branch circuit not exceeding 50 amperes supplying electric ranges, wall-mounted electric ovens, and counter-mounted electric cooking units shall have an ampacity of not less than 20 amperes and shall be sufficient for the load to be served. These tap conductors include any conductors that are a part of the leads supplied with the appliance that are smaller than the branch-circuit conductors. The taps shall not be longer than necessary for servicing the appliance. Exception No. 2: The neutral conductor of a 3-wire branch circuit supplying a household electric range, a wall-mounted oven, or a counter-mounted cooking unit shall be permitted to be smaller than the ungrounded conductors where the maximum demand of a range of 83/4 kW or more rating has been calculated according to Column C of Table 220.55, but such conductor shall have an ampacity of not less than 70 percent of the branch-circuit rating and shall not be smaller than 10 AWG. [210.19_(C)](https://2023.antflix.net#210.19_(C))", + "displayTitle": "(C) Household Ranges and Cooking Appliances", + "children": [], + "url": "https://2023.antflix.net#210.19_(C)" + }, + { + "body": "Branch-circuit conductors that supply loads other than those specified in 210.3 and other than cooking appliances as covered in 210.19(C) shall have an ampacity sufficient for the loads served and shall not be smaller than 14 AWG. Exception No. 1: Tap conductors shall have an ampacity sufficient for the load served. In addition, they shall have an ampacity of not less than 15 for circuits rated less than 40 amperes and not less than 20 for circuits rated at 40 or 50 amperes and only where these tap conductors supply any of the following loads: (1) Individual lampholders or luminaires with taps extending not longer than 450 mm (18 in.) beyond any portion of the lampholder or luminaire (2) A luminaire having tap conductors in accordance with 410.117 (3) Individual outlets, other than receptacle outlets, with taps not over 450 mm (18 in.) long (4) Infrared lamp industrial heating appliances (5) Nonheating leads of deicing and snow-melting cables and mats Exception No. 2: Fixture wires and flexible cords shall be permitted to be smaller than 14 AWG as permitted by 240.5. [210.19_(D)](https://2023.antflix.net#210.19_(D))", + "displayTitle": "(D) Other Loads", + "children": [], + "url": "https://2023.antflix.net#210.19_(D)" + } + ], + "url": "https://2023.antflix.net#210.19" + }, + { + "body": "Branch-circuit conductors and equipment for circuits not exceeding 1000 volts ac or 1500 volts dc shall be protected by overcurrent protective devices that have a rating or setting that complies with 210.20(A) through (D). [210.20](https://2023.antflix.net#210.20)", + "displayTitle": "210.20 Overcurrent Protection", + "children": [ + { + "body": "Where a branch circuit supplies continuous loads or any combination of continuous and noncontinuous loads, the rating of the overcurrent device shall not be less than the noncontinuous load plus 125 percent of the continuous load. Exception: Where the assembly, including the overcurrent devices protecting the branch circuit(s), is listed for operation at 100 percent of its rating, the ampere rating of the overcurrent device shall be permitted to be not less than the sum of the continuous load plus the noncontinuous load. [210.20_(A)](https://2023.antflix.net#210.20_(A))", + "displayTitle": "(A) Continuous and Noncontinuous Loads", + "children": [], + "url": "https://2023.antflix.net#210.20_(A)" + }, + { + "body": "Conductors shall be protected in accordance with 240.4. Flexible cords and fixture wires shall be protected in accordance with 240.5. [210.20_(B)](https://2023.antflix.net#210.20_(B))", + "displayTitle": "(B) Conductor Protection", + "children": [], + "url": "https://2023.antflix.net#210.20_(B)" + }, + { + "body": "The rating or setting of the overcurrent protective device shall not exceed that specified in the applicable articles referenced in Table 240.3 for equipment. [210.20_(C)](https://2023.antflix.net#210.20_(C))", + "displayTitle": "(C) Equipment", + "children": [], + "url": "https://2023.antflix.net#210.20_(C)" + }, + { + "body": "The rating or setting shall not exceed that specified in 210.21 for outlet devices. [210.20_(D)](https://2023.antflix.net#210.20_(D))", + "displayTitle": "(D) Outlet Devices", + "children": [], + "url": "https://2023.antflix.net#210.20_(D)" + } + ], + "url": "https://2023.antflix.net#210.20" + }, + { + "body": "Outlet devices shall have an ampere rating that is not less than the load to be served and shall comply with 210.21(A) and (B). [210.21](https://2023.antflix.net#210.21)", + "displayTitle": "210.21 Outlet Devices", + "children": [ + { + "body": "Where connected to a branch circuit having a rating in excess of 20 amperes, lampholders shall be of the heavy-duty type. A heavy-duty lampholder shall have a rating of not less than 660 watts if of the admedium type, or not less than 750 watts if of any other type. [210.21_(A)](https://2023.antflix.net#210.21_(A))", + "displayTitle": "(A) Lampholders", + "children": [], + "url": "https://2023.antflix.net#210.21_(A)" + }, + { + "displayTitle": "(B) Receptacles", + "children": [ + { + "body": "A single receptacle installed on an individual branch circuit shall have an ampere rating not less than that of the branch circuit. Exception No. 1: A receptacle installed in accordance with 430.81(B). Exception No. 2: A receptacle installed exclusively for the use of a cord-and-plug-connected arc welder shall be permitted to have an ampere rating not less than the minimum branch-circuit conductor ampacity determined by 630.11(A) for arc welders. Informational Note: See Article 100 for the definition of receptacle. [210.21_(B)_(1)](https://2023.antflix.net#210.21_(B)_(1))", + "displayTitle": "(1) Single Receptacle on an Individual Branch Circuit", + "children": [], + "url": "https://2023.antflix.net#210.21_(B)_(1)" + }, + { + "body": "Where connected to a branch circuit supplying two or more receptacles or outlets, a receptacle shall not supply a total cord-and-plug-connected load in excess of the maximum specified in Table 210.21(B)(2).\nTable 210.21(B)(2) Maximum Cord-and-Plug-Connected Load to Receptacle Circuit Rating (Amperes) Receptacle Rating (Amperes) Maximum Load (Amperes) 15 or 20 15 12 20 20 16 30 30 24 [210.21_(B)_(2)](https://2023.antflix.net#210.21_(B)_(2))", + "displayTitle": "(2) Total Cord-and-Plug-Connected Load", + "children": [], + "url": "https://2023.antflix.net#210.21_(B)_(2)" + }, + { + "body": "Where connected to a branch circuit supplying two or more receptacles or outlets, receptacle ratings shall not be less than the values listed in Table 210.21(B)(3), or, where rated higher than 50 amperes, the receptacle rating shall not be less than the branch-circuit rating. Exception No. 1: Receptacles installed exclusively for the use of cord-and-plug-connected arc welders shall be permitted to have ampere ratings not less than the minimum branch-circuit conductor ampacity determined by 630.11(A) or (B) for arc welders. Exception No. 2: The ampere rating of a receptacle installed for electric discharge lighting shall be permitted to be based on 410.62(C).Table 210.21(B)(3) Receptacle Ratings for Circuits Serving More Than One Receptacle or Receptacle Outlet Circuit Rating (Amperes) Receptacle Rating (Amperes) 15 15 20 15 or 20 30 30 40 40 or 50 50 50 [210.21_(B)_(3)](https://2023.antflix.net#210.21_(B)_(3))", + "displayTitle": "(3) Receptacle Ratings", + "children": [], + "url": "https://2023.antflix.net#210.21_(B)_(3)" + }, + { + "body": "The ampere rating of a range receptacle shall be permitted to be based on a single range demand load as specified in Table 220.55. [210.21_(B)_(4)](https://2023.antflix.net#210.21_(B)_(4))", + "displayTitle": "(4) Range Receptacle Rating", + "children": [], + "url": "https://2023.antflix.net#210.21_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#210.21_(B)" + } + ], + "url": "https://2023.antflix.net#210.21" + }, + { + "body": "An individual branch circuit shall be permitted to supply any load for which it is rated, but in no case shall the load exceed the branch-circuit ampere rating. [210.22](https://2023.antflix.net#210.22)", + "displayTitle": "210.22 Permissible Loads, Individual Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.22" + }, + { + "body": "In no case shall the load exceed the branch-circuit ampere rating. A branch circuit supplying two or more outlets or receptacles shall supply only the loads specified according to its size in accordance with 210.23(A) through (E) and as summarized in 210.24. [210.23](https://2023.antflix.net#210.23)", + "displayTitle": "210.23 Permissible Loads, Multiple-Outlet Branch Circuits", + "children": [ + { + "body": "A 10-ampere branch circuit shall comply with the requirements of 210.23(A)(1) and (A)(2). [210.23_(A)](https://2023.antflix.net#210.23_(A))", + "displayTitle": "(A) 10-Ampere Branch Circuits", + "children": [ + { + "body": "A 10-ampere branch circuit shall be permitted to supply one or more of the following: Lighting outletsDwelling unit exhaust fans on bathroom or laundry room lighting circuitsA gas fireplace unit supplied by an individual branch circuit [210.23_(A)_(1)](https://2023.antflix.net#210.23_(A)_(1))", + "displayTitle": "(1) Loads Permitted for 10-Ampere Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.23_(A)_(1)" + }, + { + "body": "A 10-ampere branch circuit shall not supply any of the following: Receptacle outletsFixed appliances, except as permitted for individual branch circuitsGarage door openersLaundry equipment [210.23_(A)_(2)](https://2023.antflix.net#210.23_(A)_(2))", + "displayTitle": "(2) Loads Not Permitted for 10-Ampere Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.23_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#210.23_(A)" + }, + { + "body": "A 15- or 20-ampere branch circuit shall be permitted to supply lighting outlets, lighting units, or other utilization equipment, or any combination of them, and shall comply with 210.23(B)(1) and (B)(2). Exception: The small-appliance branch circuits, laundry branch circuits, and bathroom branch circuits required in a dwelling unit(s) by 210.11(C)(1), (C)(2), and (C)(3) shall supply only the receptacle outlets specified in that section. [210.23_(B)](https://2023.antflix.net#210.23_(B))", + "displayTitle": "(B) 15- And 20-Ampere Branch Circuits", + "children": [ + { + "body": "The rating of any one cord-and-plug-connected utilization equipment not fastened in place shall not exceed 80 percent of the branch-circuit ampere rating. [210.23_(B)_(1)](https://2023.antflix.net#210.23_(B)_(1))", + "displayTitle": "(1) Cord-and-Plug-Connected Equipment Not Fastened in Place", + "children": [], + "url": "https://2023.antflix.net#210.23_(B)_(1)" + }, + { + "body": "The total rating of utilization equipment fastened in place, other than luminaires, shall not exceed 50 percent of the branch-circuit ampere rating where lighting units, cord-and-plug-connected utilization equipment not fastened in place, or both, are also supplied. [210.23_(B)_(2)](https://2023.antflix.net#210.23_(B)_(2))", + "displayTitle": "(2) Utilization Equipment Fastened in Place", + "children": [], + "url": "https://2023.antflix.net#210.23_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#210.23_(B)" + }, + { + "body": "A 30-ampere branch circuit shall be permitted to supply fixed lighting units with heavy-duty lampholders in other than a dwelling unit(s) or utilization equipment in any occupancy. The rating of any one cord-and-plug-connected utilization equipment shall not exceed 80 percent of the branch-circuit ampere rating. [210.23_(C)](https://2023.antflix.net#210.23_(C))", + "displayTitle": "(C) 30-Ampere Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.23_(C)" + }, + { + "body": "A 40- or 50-ampere branch circuit shall be permitted to supply cooking appliances that are fastened in place in any occupancy. In other than dwelling units, such circuits shall be permitted to supply fixed lighting units with heavy-duty lampholders, infrared heating units, or other utilization equipment. [210.23_(D)](https://2023.antflix.net#210.23_(D))", + "displayTitle": "(D) 40- And 50-Ampere Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.23_(D)" + }, + { + "body": "Branch circuits larger than 50 amperes shall supply only nonlighting outlet loads. [210.23_(E)](https://2023.antflix.net#210.23_(E))", + "displayTitle": "(E) Branch Circuits Larger Than 50 Amperes", + "children": [], + "url": "https://2023.antflix.net#210.23_(E)" + } + ], + "url": "https://2023.antflix.net#210.23" + }, + { + "body": "The requirements for circuits that have two or more outlets or receptacles, other than the receptacle circuits of 210.11(C)(1), (C)(2), and (C)(3), are summarized in Table 210.24(1) for copper conductors and Table 210.24(2) for aluminum and copper-clad aluminum conductors. Table 210.24(1) and Table 210.24(2) provide only a summary of minimum requirements. See 210.19, 210.20, and 210.21 for the specific requirements applying to branch circuits. Table 210.24(1) Summary of Branch-Circuit Requirements - Copper Conductors Circuit Rating 10 A 15 A 20 A 30 A 40 A 50 A Conductors (min. size): Circuit wires 14 14 12 10 8 6 Taps 14 14 14 14 12 12 Fixture wires and cords See 240.5. Overcurrent Protection 10 A 15 A 20 A 30 A 40 A 50 A Outlet devices: Lampholders permitted Any type Any type Any type Heavy duty Heavy duty Heavy duty Receptacle rating1 Not applicable2 15 max. A 15 A or 20 A 30 A 40 A or 50 A 50 A Maximum Load 10 A 15 A 20 A 30 A 40 A 50 A Permissible load See 210.23(A). See 210.23(B). See 210.23(B). See 210.23(C). See 210.23(D). See 210.23(D). 1For receptacle rating of cord-connected electric-discharge luminaires, see 410.62(C). 2Branch circuits rated 10-amperes shall not supply receptacle outlets. Table 210.24(2) Summary of Branch-Circuit Requirements - Aluminum and Copper-Clad Aluminum Conductors Circuit Rating 10 A 15 A 20 A 30 A 40 A 50 A Conductors (min. size): Circuit wires 12 12 10 8 6 4 Taps 12 12 12 12 10 10 Fixture wires and cords See 240.5. Overcurrent Protection 10 A 15 A 20 A 30 A 40 A 50 A Outlet devices: Lampholders permitted Any type Any type Any type Heavy duty Heavy duty Heavy duty Receptacle rating1 Not applicable2 15 max. A 15 A or 20 A 30 A 40 A or 50 A 50 A Maximum Load 10 A 15 A 20 A 30 A 40 A 50 A Permissible load See 210.23(A). See 210.23(B). See 210.23(B). See 210.23(C). See 210.23(D). See 210.23(D). 1For receptacle rating of cord-connected electric-discharge luminaires, see 410.62(C). 2Branch circuits rated 10-amperes shall not supply receptacle outlets. [210.24](https://2023.antflix.net#210.24)", + "displayTitle": "210.24 Branch-Circuit Requirements - Summary", + "children": [], + "url": "https://2023.antflix.net#210.24" + }, + { + "displayTitle": "210.25 Branch Circuits in Buildings With More Than One Occupancy", + "children": [ + { + "body": "Branch circuits in each dwelling unit shall supply only loads within that dwelling unit or loads associated only with that dwelling unit. [210.25_(A)](https://2023.antflix.net#210.25_(A))", + "displayTitle": "(A) Dwelling Unit Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.25_(A)" + }, + { + "body": "Branch circuits installed for lighting, central alarm, signal, communications, or other purposes for public or common areas of a two-family dwelling, a multifamily dwelling, or a multi-occupancy building shall not be supplied from equipment that supplies an individual dwelling unit or tenant space. Informational Note: Examples of public or common areas include, but are not limited to, lobbies, corridors, stairways, laundry rooms, roofs, elevators, washrooms, store rooms, driveways (parking), and mechanical rooms. [210.25_(B)](https://2023.antflix.net#210.25_(B))", + "displayTitle": "(B) Common Area Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#210.25_(B)" + } + ], + "url": "https://2023.antflix.net#210.25" + }, + { + "displayTitle": "Part III Required Outlets", + "children": [], + "url": "https://2023.antflix.net#divider_2_III" + }, + { + "body": "Receptacle outlets shall be installed as specified in 210.52 through 210.65. Informational Note: See Informative Annex J for information regarding ADA accessibility design. [210.50](https://2023.antflix.net#210.50)", + "displayTitle": "210.50 Receptacle Outlets", + "children": [ + { + "body": "A cord connector that is supplied by a permanently connected cord pendant shall be considered a receptacle outlet. [210.50_(A)](https://2023.antflix.net#210.50_(A))", + "displayTitle": "(A) Cord Pendants", + "children": [], + "url": "https://2023.antflix.net#210.50_(A)" + }, + { + "body": "A receptacle outlet shall be installed wherever flexible cords with attachment plugs are used. Where flexible cords are permitted to be permanently connected, receptacles shall be permitted to be omitted for such cords. [210.50_(B)](https://2023.antflix.net#210.50_(B))", + "displayTitle": "(B) Cord Connections", + "children": [], + "url": "https://2023.antflix.net#210.50_(B)" + }, + { + "body": "Appliance receptacle outlets installed in a dwelling unit for specific appliances, such as laundry equipment, shall be installed within 1.8 m (6 ft) of the intended location of the appliance. [210.50_(C)](https://2023.antflix.net#210.50_(C))", + "displayTitle": "(C) Appliance Receptacle Outlets", + "children": [], + "url": "https://2023.antflix.net#210.50_(C)" + } + ], + "url": "https://2023.antflix.net#210.50" + }, + { + "body": "This section provides requirements for 125-volt, 15- and 20-ampere receptacle outlets. The receptacles required by this section shall be in addition to any receptacle that is as follows: Part of a luminaire or appliance, orControlled by a listed wall-mounted control device in accordance with 210.70(A)(1), Exception No. 1, orLocated within cabinets or cupboards, orLocated more than 1.7 m (51/2 ft) above the floorPermanently installed electric baseboard heaters equipped with factory-installed receptacle outlets or outlets provided as a separate assembly by the manufacturer shall be permitted as the required outlet or outlets for the wall space utilized by such permanently installed heaters. Such receptacle outlets shall not be connected to the heater circuits.Informational Note: Listed baseboard heaters include instructions that may not permit their installation below receptacle outlets. [210.52](https://2023.antflix.net#210.52)", + "displayTitle": "210.52 Dwelling Unit Receptacle Outlets", + "children": [ + { + "body": "In every kitchen, family room, dining room, living room, parlor, library, den, sunroom, bedroom, recreation room, or similar room or area of dwelling units, receptacle outlets shall be installed in accordance with the general provisions specified in 210.52(A)(1) through (A)(4). [210.52_(A)](https://2023.antflix.net#210.52_(A))", + "displayTitle": "(A) General Provisions", + "children": [ + { + "body": "Receptacles shall be installed such that no point measured horizontally along the floor line of any wall space is more than 1.8 m (6 ft) from a receptacle outlet. [210.52_(A)_(1)](https://2023.antflix.net#210.52_(A)_(1))", + "displayTitle": "(1) Spacing", + "children": [], + "url": "https://2023.antflix.net#210.52_(A)_(1)" + }, + { + "body": "As used in this section, a wall space shall include the following: Any space 600 mm (2 ft) or more in width (including space measured around corners) and unbroken along the floor line by doorways and similar openings, fireplaces, stationary appliances, and fixed cabinets that do not have countertops or similar work surfacesThe space occupied by fixed panels in walls, excluding sliding panelsThe space afforded by fixed room dividers, such as freestanding bar-type counters or railings [210.52_(A)_(2)](https://2023.antflix.net#210.52_(A)_(2))", + "displayTitle": "(2) Wall Space", + "children": [], + "url": "https://2023.antflix.net#210.52_(A)_(2)" + }, + { + "body": "Receptacle outlets in or on floors shall not be counted as part of the required number of receptacle outlets unless located within 450 mm (18 in.) of the wall. [210.52_(A)_(3)](https://2023.antflix.net#210.52_(A)_(3))", + "displayTitle": "(3) Floor Receptacles", + "children": [], + "url": "https://2023.antflix.net#210.52_(A)_(3)" + }, + { + "body": "Receptacles installed for countertop and similar work surfaces as specified in 210.52(C) shall not be considered as the receptacle outlets required by 210.52(A). [210.52_(A)_(4)](https://2023.antflix.net#210.52_(A)_(4))", + "displayTitle": "(4) Countertop and Similar Work Surface Receptacle Outlets", + "children": [], + "url": "https://2023.antflix.net#210.52_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#210.52_(A)" + }, + { + "displayTitle": "(B) Small Appliances", + "children": [ + { + "body": "In the kitchen, pantry, breakfast room, dining room, or similar area of a dwelling unit, the two or more 20-ampere small-appliance branch circuits required by 210.11(C)(1) shall serve all wall and floor receptacle outlets covered by 210.52(A), all countertop outlets covered by 210.52(C), and receptacle outlets for refrigeration equipment. Exception No. 1: In addition to the required receptacles specified by 210.52, switched receptacles supplied from a general-purpose 15- or 20-ampere branch circuit shall be permitted in accordance with 210.70(A)(1), Exception No. 1. Exception No. 2: In addition to the required receptacles specified by 210.52, a receptacle outlet to serve a specific appliance shall be permitted to be supplied from an individual branch circuit rated 15 amperes or greater. [210.52_(B)_(1)](https://2023.antflix.net#210.52_(B)_(1))", + "displayTitle": "(1) Receptacle Outlets Served", + "children": [], + "url": "https://2023.antflix.net#210.52_(B)_(1)" + }, + { + "body": "The two or more small-appliance branch circuits specified in 210.52(B)(1) shall have no other outlets. Exception No. 1: A receptacle installed solely for the electrical supply to and support of an electric clock in any of the rooms specified in 210.52(B)(1) shall be permitted to be served by a small-appliance branch circuit. Exception No. 2: Receptacles installed to provide power for supplemental equipment and lighting on gas-fired ranges, ovens, or counter-mounted cooking units shall be permitted to be served by a small-appliance branch circuit. [210.52_(B)_(2)](https://2023.antflix.net#210.52_(B)_(2))", + "displayTitle": "(2) No Other Outlets", + "children": [], + "url": "https://2023.antflix.net#210.52_(B)_(2)" + }, + { + "body": "Receptacles installed in a kitchen to serve countertop surfaces shall be supplied by not fewer than two small-appliance branch circuits, either or both of which shall also be permitted to supply receptacle outlets in the same kitchen and in other rooms specified in 210.52(B)(1). Additional small-appliance branch circuits shall be permitted to supply receptacle outlets in the kitchen and other rooms specified in 210.52(B)(1). No small-appliance branch circuit shall serve more than one kitchen. [210.52_(B)_(3)](https://2023.antflix.net#210.52_(B)_(3))", + "displayTitle": "(3) Kitchen Receptacle Requirements", + "children": [], + "url": "https://2023.antflix.net#210.52_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#210.52_(B)" + }, + { + "body": "In kitchens, pantries, breakfast rooms, dining rooms, and similar areas of dwelling units, receptacle outlets for countertop and work surfaces that are 300 mm (12 in.) or wider shall be installed in accordance with 210.52(C)(1) through (C)(3) and shall not be considered as the receptacle outlets required by 210.52(A). For the purposes of this section, where using multioutlet assemblies, each 300 mm (12 in.) of multioutlet assembly containing two or more receptacles installed in individual or continuous lengths shall be considered to be one receptacle outlet. [210.52_(C)](https://2023.antflix.net#210.52_(C))", + "displayTitle": "(C) Countertops and Work Surfaces", + "children": [ + { + "body": "Receptacle outlets shall be installed so that no point along the wall line is more than 600 mm (24 in.) measured horizontally from a receptacle outlet in that space. The location of the receptacles shall be in accordance with 210.52(C)(3). Exception No. 1: Receptacle outlets shall not be required directly behind a range, counter-mounted cooking unit, or sink in the installation described in Figure 210.52(C)(1). Exception No. 2: Where a required receptacle outlet cannot be installed in the wall areas shown in Figure 210.52(C)(1), the receptacle outlet shall be permitted to be installed as close as practicable to the countertop area to be served. The total number of receptacle outlets serving the countertop shall not be less than the number needed to satisfy 210.52(C)(1). These outlets shall be located in accordance with 210.52(C)(3).FIGURE 210.52(C)(1) Determination of Area Behind a Range, Counter-Mounted Cooking Unit, or Sink. [210.52_(C)_(1)](https://2023.antflix.net#210.52_(C)_(1))", + "displayTitle": "(1) Wall Spaces", + "children": [], + "url": "https://2023.antflix.net#210.52_(C)_(1)" + }, + { + "body": "Receptacle outlets, if installed to serve an island or peninsular countertop or work surface, shall be installed in accordance with 210.52(C)(3). If a receptacle outlet is not provided to serve an island or peninsular countertop or work surface, provisions shall be provided at the island or peninsula for future addition of a receptacle outlet to serve the island or peninsular countertop or work surface. [210.52_(C)_(2)](https://2023.antflix.net#210.52_(C)_(2))", + "displayTitle": "(2) Island and Peninsular Countertops and Work Surfaces", + "children": [], + "url": "https://2023.antflix.net#210.52_(C)_(2)" + }, + { + "body": "Receptacle outlets shall be located in one or more of the following: On or above, but not more than 500 mm (20 in.) above, a countertop or work surfaceIn a countertop using receptacle outlet assemblies listed for use in countertopsIn a work surface using receptacle outlet assemblies listed for use in work surfaces or listed for use in countertopsReceptacle outlets rendered not readily accessible by appliances fastened in place, appliance garages, sinks, or rangetops as covered in 210.52(C)(1), Exception No. 1, or appliances occupying assigned spaces shall not be considered as these required outlets.Informational Note No. 1: See 406.5(E) for installation of receptacles in countertops and 406.5(F) for installation of receptacles in work surfaces. See 380.10 for installation of multioutlet assemblies.Informational Note No. 2: See Informative Annex J and ANSI/ICC A117.1-2009, Standard on Accessible and Usable Buildings and Facilities, for additional information. [210.52_(C)_(3)](https://2023.antflix.net#210.52_(C)_(3))", + "displayTitle": "(3) Receptacle Outlet Location", + "children": [], + "url": "https://2023.antflix.net#210.52_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#210.52_(C)" + }, + { + "body": "At least one receptacle outlet shall be installed in bathrooms within 900 mm (3 ft) of the outside edge of each sink. The receptacle outlet shall be located on a wall or partition that is adjacent to the sink or sink countertop, located on the countertop, or installed on the side or face of the sink cabinet. In no case shall the receptacle be located more than 300 mm (12 in.) below the top of the sink or sink countertop. Receptacle outlet assemblies listed for use in countertops shall be permitted to be installed in the countertop. Informational Note: See 406.5(E) and 406.5(G) for requirements on installation of receptacles in countertops. [210.52_(D)](https://2023.antflix.net#210.52_(D))", + "displayTitle": "(D) Bathrooms", + "children": [], + "url": "https://2023.antflix.net#210.52_(D)" + }, + { + "body": "Outdoor receptacle outlets shall be installed in accordance with 210.52(E)(1) through (E)(3). [210.52_(E)](https://2023.antflix.net#210.52_(E))", + "displayTitle": "(E) Outdoor Outlets", + "children": [ + { + "body": "For a one-family dwelling and each unit of a two-family dwelling that is at grade level, at least one receptacle outlet readily accessible from grade and not more than 2.0 m (61/2 ft) above grade level shall be installed at the front and back of the dwelling. [210.52_(E)_(1)](https://2023.antflix.net#210.52_(E)_(1))", + "displayTitle": "(1) One-Family and Two-Family Dwellings", + "children": [], + "url": "https://2023.antflix.net#210.52_(E)_(1)" + }, + { + "body": "For each dwelling unit of a multifamily dwelling where the dwelling unit is located at grade level and provided with individual exterior entrance/egress, at least one receptacle outlet readily accessible from grade and not more than 2.0 m (61/2 ft) above grade level shall be installed. [210.52_(E)_(2)](https://2023.antflix.net#210.52_(E)_(2))", + "displayTitle": "(2) Multifamily Dwellings", + "children": [], + "url": "https://2023.antflix.net#210.52_(E)_(2)" + }, + { + "body": "Balconies, decks, and porches that are within 102 mm (4 in.) horizontally of the dwelling unit shall have at least one receptacle outlet accessible from the balcony, deck, or porch. The receptacle outlet shall not be located more than 2.0 m (61/2 ft) above the balcony, deck, or porch walking surface. [210.52_(E)_(3)](https://2023.antflix.net#210.52_(E)_(3))", + "displayTitle": "(3) Balconies, Decks, and Porches", + "children": [], + "url": "https://2023.antflix.net#210.52_(E)_(3)" + } + ], + "url": "https://2023.antflix.net#210.52_(E)" + }, + { + "body": "In dwelling units, at least one receptacle outlet shall be installed in areas designated for the installation of laundry equipment. Exception No. 1: A receptacle for laundry equipment shall not be required in a dwelling unit of a multifamily building where laundry facilities are provided on the premises for use by all building occupants. Exception No. 2: A receptacle for laundry equipment shall not be required in other than one-family dwellings where laundry facilities are not to be installed or permitted. [210.52_(F)](https://2023.antflix.net#210.52_(F))", + "displayTitle": "(F) Laundry Areas", + "children": [], + "url": "https://2023.antflix.net#210.52_(F)" + }, + { + "body": "For one- and two-family dwellings, and multifamily dwellings, at least one receptacle outlet shall be installed in the areas specified in 210.52(G)(1) through (G)(3). These receptacles shall be in addition to receptacles required for specific equipment. Receptacles supplying only a permanently installed premises security system shall not be considered as meeting these requirements. [210.52_(G)](https://2023.antflix.net#210.52_(G))", + "displayTitle": "(G) Basements, Garages, and Accessory Buildings", + "children": [ + { + "body": "In each attached garage and in each detached garage with electric power, at least one receptacle outlet shall be installed in each vehicle bay and not more than 1.7 m (51/2 ft) above the floor. Exception: Garage spaces not attached to an individual dwelling unit of a multifamily dwelling shall not require a receptacle outlet in each vehicle bay. [210.52_(G)_(1)](https://2023.antflix.net#210.52_(G)_(1))", + "displayTitle": "(1) Garages", + "children": [], + "url": "https://2023.antflix.net#210.52_(G)_(1)" + }, + { + "body": "In each accessory building with electric power. [210.52_(G)_(2)](https://2023.antflix.net#210.52_(G)_(2))", + "displayTitle": "(2) Accessory Buildings", + "children": [], + "url": "https://2023.antflix.net#210.52_(G)_(2)" + }, + { + "body": "In each separate unfinished portion of a basement. [210.52_(G)_(3)](https://2023.antflix.net#210.52_(G)_(3))", + "displayTitle": "(3) Basements", + "children": [], + "url": "https://2023.antflix.net#210.52_(G)_(3)" + } + ], + "url": "https://2023.antflix.net#210.52_(G)" + }, + { + "body": "In dwelling units, hallways of 3.0 m (10 ft) or more in length shall have at least one receptacle outlet. As used in this subsection, the hallway length shall be considered the length along the centerline of the hallway without passing through a doorway. [210.52_(H)](https://2023.antflix.net#210.52_(H))", + "displayTitle": "(H) Hallways", + "children": [], + "url": "https://2023.antflix.net#210.52_(H)" + }, + { + "body": "Foyers that are not part of a hallway in accordance with 210.52(H) and that have an area that is greater than 5.6 m2 (60 ft2) shall have a receptacle(s) located in each wall space 900 mm (3 ft) or more in width. Doorways, door-side windows that extend to the floor, and similar openings shall not be considered wall space. [210.52_(I)](https://2023.antflix.net#210.52_(I))", + "displayTitle": "(I) Foyers", + "children": [], + "url": "https://2023.antflix.net#210.52_(I)" + } + ], + "url": "https://2023.antflix.net#210.52" + }, + { + "displayTitle": "210.60 Guest Rooms, Guest Suites, Dormitory Units, and Similar Occupancies", + "children": [ + { + "body": "Guest rooms or guest suites in hotels or motels, sleeping rooms in dormitory units, and similar occupancies shall have receptacle outlets installed in accordance with 210.52(A) and (D). Guest rooms or guest suites provided with permanent provisions for cooking shall have receptacle outlets installed in accordance with all of the applicable rules in 210.52. [210.60_(A)](https://2023.antflix.net#210.60_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#210.60_(A)" + }, + { + "body": "The total number of receptacle outlets shall not be less than required in 210.52(A). These receptacle outlets shall be permitted to be located conveniently for permanent furniture layout. At least two receptacle outlets shall be readily accessible. Where receptacles are installed behind the bed, the receptacle shall be located to prevent the bed from contacting any attachment plug that may be installed or the receptacle shall be provided with a suitable guard. [210.60_(B)](https://2023.antflix.net#210.60_(B))", + "displayTitle": "(B) Receptacle Placement", + "children": [], + "url": "https://2023.antflix.net#210.60_(B)" + } + ], + "url": "https://2023.antflix.net#210.60" + }, + { + "body": "At least one 125-volt, single-phase, 15- or 20-ampere-rated receptacle outlet shall be installed within 450 mm (18 in.) of the top of each show window. No point along the top of the window shall be farther than 1.8 m (6 ft) from a receptacle outlet. [210.62](https://2023.antflix.net#210.62)", + "displayTitle": "210.62 Show Windows", + "children": [], + "url": "https://2023.antflix.net#210.62" + }, + { + "body": "A 125-volt, single-phase, 15- or 20-ampere-rated receptacle outlet shall be installed at an accessible location within 7.5 m (25 ft) of the equipment as specified in 210.63(A) and (B). Informational Note: See 210.8(E) for requirements on GFCI protection. [210.63](https://2023.antflix.net#210.63)", + "displayTitle": "210.63 Equipment Requiring Servicing", + "children": [ + { + "body": "The required receptacle outlet shall be located on the same level as the heating, air-conditioning, and refrigeration equipment. The receptacle outlet shall not be connected to the load side of the equipment's branch-circuit disconnecting means. Exception: A receptacle outlet shall not be required at one- and two-family dwellings for the service of evaporative coolers. [210.63_(A)](https://2023.antflix.net#210.63_(A))", + "displayTitle": "(A) Heating, Air-Conditioning, and Refrigeration Equipment", + "children": [], + "url": "https://2023.antflix.net#210.63_(A)" + }, + { + "body": "In other than one- and two-family dwellings, a receptacle outlet shall be located as specified in 210.63(B)(1) and (B)(2). [210.63_(B)](https://2023.antflix.net#210.63_(B))", + "displayTitle": "(B) Other Electrical Equipment", + "children": [ + { + "body": "The required receptacle outlet shall be located within the same room or area as the service equipment. [210.63_(B)_(1)](https://2023.antflix.net#210.63_(B)_(1))", + "displayTitle": "(1) Indoor Service Equipment", + "children": [], + "url": "https://2023.antflix.net#210.63_(B)_(1)" + }, + { + "body": "Where equipment, other than service equipment, requires dedicated equipment space as specified in 110.26(E), the required receptacle outlet shall be located within the same room or area as the electrical equipment and shall not be connected to the load side of the equipment's disconnecting means. [210.63_(B)_(2)](https://2023.antflix.net#210.63_(B)_(2))", + "displayTitle": "(2) Indoor Equipment Requiring Dedicated Equipment Spaces", + "children": [], + "url": "https://2023.antflix.net#210.63_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#210.63_(B)" + } + ], + "url": "https://2023.antflix.net#210.63" + }, + { + "displayTitle": "210.65 Meeting Rooms", + "children": [ + { + "body": "Each meeting room of not more than 93 m2 (1000 ft2) in other than dwelling units shall have outlets for nonlocking-type, 125-volt, 15- or 20-ampere receptacles. The outlets shall be installed in accordance with 210.65(B). Where a room or space is provided with movable partition(s), each room size shall be determined with the partition in the position that results in the smallest size meeting room. Informational Note No. 1: For the purposes of this section, meeting rooms are typically designed or intended for the gathering of seated occupants for such purposes as conferences, deliberations, or similar purposes, where portable electronic equipment such as computers, projectors, or similar equipment is likely to be used. Informational Note No. 2: Examples of rooms that are not meeting rooms include auditoriums, schoolrooms, and coffee shops. [210.65_(A)](https://2023.antflix.net#210.65_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#210.65_(A)" + }, + { + "body": "The total number of receptacle outlets, including floor outlets and receptacle outlets in fixed furniture, shall not be less than as determined in 210.65(B)(1) and (B)(2). [210.65_(B)](https://2023.antflix.net#210.65_(B))", + "displayTitle": "(B) Receptacle Outlets Required", + "children": [ + { + "body": "The required number of receptacle outlets shall be determined in accordance with 210.52(A)(1) through (A)(4). These receptacle outlets shall be permitted to be located as determined by the installer, designer, or building owner. [210.65_(B)_(1)](https://2023.antflix.net#210.65_(B)_(1))", + "displayTitle": "(1) Receptacle Outlets in Fixed Walls", + "children": [], + "url": "https://2023.antflix.net#210.65_(B)_(1)" + }, + { + "body": "A meeting room with any floor dimension that is 3.7 m (12 ft) or greater in any direction and that has a floor area of at least 20 m2 (215 ft2) shall have at least one floor receptacle outlet, or at least one floor outlet to serve a receptacle(s), located at a distance not less than 1.8 m (6 ft) from any fixed wall for each 20 m2 (215 ft2) or fraction thereof. Informational Note No. 1: See 314.27(B) for requirements on floor boxes used for receptacles located in the floor. Informational Note No. 2: See 518.1 for requirements on assembly occupancies designed for 100 or more persons. [210.65_(B)_(2)](https://2023.antflix.net#210.65_(B)_(2))", + "displayTitle": "(2) Floor Outlets", + "children": [], + "url": "https://2023.antflix.net#210.65_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#210.65_(B)" + } + ], + "url": "https://2023.antflix.net#210.65" + }, + { + "body": "Lighting outlets shall be installed where specified in 210.70(A), (B), and (C). The switch or wall-mounted control device shall not rely exclusively on a battery unless a means is provided for automatically energizing the lighting outlets upon battery failure. [210.70](https://2023.antflix.net#210.70)", + "displayTitle": "210.70 Lighting Outlets Required", + "children": [ + { + "body": "In dwelling units, lighting outlets shall be installed in accordance with 210.70(A)(1) and (A)(2). [210.70_(A)](https://2023.antflix.net#210.70_(A))", + "displayTitle": "(A) Dwelling Units", + "children": [ + { + "body": "At least one lighting outlet controlled by a listed wall-mounted control device shall be installed in every habitable room, kitchen, laundry area, and bathroom. The wall-mounted control device shall be located near an entrance to the room on a wall. Exception No. 1: In other than kitchens, laundry areas, and bathrooms, one or more receptacles controlled by a listed wall-mounted control device shall be permitted in lieu of lighting outlets. Exception No. 2: Lighting outlets shall be permitted to be controlled by occupancy sensors that are (1) in addition to listed wall-mounted control devices or (2) located at a customary wall switch location and equipped with a manual override that will allow the sensor to function as a wall switch. [210.70_(A)_(1)](https://2023.antflix.net#210.70_(A)_(1))", + "displayTitle": "(1) Habitable Rooms, Kitchens, Laundry Areas, and Bathrooms", + "children": [], + "url": "https://2023.antflix.net#210.70_(A)_(1)" + }, + { + "body": "Additional lighting outlets shall be installed in accordance with the following: At least one lighting outlet controlled by a listed wall-mounted control device shall be installed in hallways, stairways, attached garages, detached garages, and accessory buildings with electric power.For dwelling units, attached garages, and detached garages with electric power, at least one exterior lighting outlet controlled by a listed wall-mounted control device shall be installed to provide illumination on the exterior side of outdoor entrances or exits with grade-level access. A vehicle door in a garage shall not be considered as an outdoor entrance or exit.Exception to (2): For an outdoor, grade-level bulkhead door with stairway access to a sub-grade-level basement, the required lighting outlet that provides illumination on the stairway steps shall be permitted to be located in the basement interior within 1.5 m (5 ft) horizontally of the bottommost stairway riser. This interior lighting outlet shall be permitted to be controlled by a listed wall-mounted control device or by a unit switch of the interior luminaire or interior lampholder.Where lighting outlets are installed for an interior stairway with six or more risers between floor levels, there shall be a listed wall-mounted control device at each floor level and at each landing level that includes a stairway entry to control the lighting outlets.Exception to (1), (2), and (3): Remote, central, or automatic control of lighting shall be permitted in hallways, in stairways, and at outdoor entrances.Dimmer control of lighting outlets installed in accordance with 210.70(A)(2)(3) shall not be permitted unless the listed control devices can provide dimming control to maximum brightness at each control location for the interior stairway illumination. [210.70_(A)_(2)](https://2023.antflix.net#210.70_(A)_(2))", + "displayTitle": "(2) Additional Locations", + "children": [], + "url": "https://2023.antflix.net#210.70_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#210.70_(A)" + }, + { + "body": "In hotels, motels, or similar occupancies, guest rooms or guest suites shall have at least one lighting outlet controlled by a listed wall-mounted control device installed in every habitable room and bathroom. Exception No. 1: In other than bathrooms and kitchens where provided, one or more receptacles controlled by a listed wall-mounted control device shall be permitted in lieu of lighting outlets. Exception No. 2: Lighting outlets shall be permitted to be controlled by occupancy sensors that are (1) in addition to listed wall-mounted control devices or (2) located at a customary wall switch location and equipped with a manual override that allows the sensor to function as a wall switch. [210.70_(B)](https://2023.antflix.net#210.70_(B))", + "displayTitle": "(B) Guest Rooms or Guest Suites", + "children": [], + "url": "https://2023.antflix.net#210.70_(B)" + }, + { + "body": "For attics and underfloor spaces, utility rooms, and basements, at least one lighting outlet containing a switch or controlled by a wall switch or listed wall-mounted control device shall be installed where these spaces are used for storage or contain equipment requiring servicing. A point of control shall be at each entry that permits access to the attic and underfloor space, utility room, or basement. Where a lighting outlet is installed for equipment requiring service, the lighting outlet shall be installed at or near the equipment. [210.70_(C)](https://2023.antflix.net#210.70_(C))", + "displayTitle": "(C) All Occupancies", + "children": [], + "url": "https://2023.antflix.net#210.70_(C)" + } + ], + "url": "https://2023.antflix.net#210.70" + } + ], + "url": "https://2023.antflix.net#210" + }, + { + "displayTitle": "Article 215 Feeders", + "children": [ + { + "body": "This article covers the installation requirements, overcurrent protection requirements, minimum size, and ampacity of conductors for feeders not over 1000 volts ac or 1500 volts dc, nominal. Informational Note: See Part III of Article 235 for feeders over 1000 volts ac or 1500 volts dc. [215.1](https://2023.antflix.net#215.1)", + "displayTitle": "215.1 Scope", + "children": [], + "url": "https://2023.antflix.net#215.1" + }, + { + "displayTitle": "215.2 Minimum Rating and Size", + "children": [ + { + "body": "Feeder conductors shall have an ampacity not less than the larger of 215.2(A)(1) or (A)(2) and shall comply with 110.14(C). [215.2_(A)](https://2023.antflix.net#215.2_(A))", + "displayTitle": "(A) General", + "children": [ + { + "body": "Where a feeder supplies continuous loads or any combination of continuous and noncontinuous loads, the minimum feeder conductor size shall have an ampacity not less than the noncontinuous load plus 125 percent of the continuous load. Exception No. 1: If the assembly, including the overcurrent devices protecting the feeder(s), is listed for operation at 100 percent of its rating, the ampacity of the feeder conductors shall be permitted to be not less than the sum of the continuous load plus the noncontinuous load. Exception No. 2: Where a portion of a feeder is connected at both its supply and load ends to separately installed pressure connections as covered in 110.14(C)(2), it shall be permitted to have an ampacity not less than the sum of the continuous load plus the noncontinuous load. No portion of a feeder installed under this exception shall extend into an enclosure containing either the feeder supply or the feeder load terminations, as covered in 110.14(C)(1). Exception No. 3: Grounded conductors that are not connected to an overcurrent device shall be permitted to be sized at 100 percent of the continuous and noncontinuous load. [215.2_(A)_(1)](https://2023.antflix.net#215.2_(A)_(1))", + "displayTitle": "(1) Continuous and Noncontinuous Loads", + "children": [], + "url": "https://2023.antflix.net#215.2_(A)_(1)" + }, + { + "body": "The minimum feeder conductor size shall have an ampacity not less than the maximum load to be served after the application of any adjustment or correction factors in accordance with 310.14. Informational Note No. 1: See Informative Annex D for Examples D1 through D11. Informational Note No. 2: Conductors for feeders, as defined in Article 100, sized to prevent a voltage drop exceeding 3 percent at the farthest outlet of power, heating, and lighting loads, or combinations of such loads, and where the maximum total voltage drop on both feeders and branch circuits to the farthest outlet does not exceed 5 percent, will provide reasonable efficiency of operation. Informational Note No. 3: See 210.19, Informational Note for voltage drop for branch circuits. [215.2_(A)_(2)](https://2023.antflix.net#215.2_(A)_(2))", + "displayTitle": "(2) Ampacity Adjustment or Correction Factors", + "children": [], + "url": "https://2023.antflix.net#215.2_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#215.2_(A)" + }, + { + "body": "The size of the feeder circuit grounded conductor shall not be smaller than the equipment grounding conductor size required by 250.122, except that 250.122(F) shall not apply where grounded conductors are run in parallel. Additional minimum sizes shall be as specified in 215.2(C) under the conditions stipulated. [215.2_(B)](https://2023.antflix.net#215.2_(B))", + "displayTitle": "(B) Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#215.2_(B)" + }, + { + "body": "The feeder conductor ampacity shall not be less than that of the service conductors where the feeder conductors carry the total load supplied by service conductors with an ampacity of 55 amperes or less. [215.2_(C)](https://2023.antflix.net#215.2_(C))", + "displayTitle": "(C) Ampacity Relative to Service Conductors", + "children": [], + "url": "https://2023.antflix.net#215.2_(C)" + } + ], + "url": "https://2023.antflix.net#215.2" + }, + { + "body": "Feeders shall be protected against overcurrent in accordance with Part I of Article 240. Where a feeder supplies continuous loads or any combination of continuous and noncontinuous loads, the rating of the overcurrent device shall not be less than the noncontinuous load plus 125 percent of the continuous load. Exception: Where the assembly, including the overcurrent devices protecting the feeder(s), is listed for operation at 100 percent of its rating, the ampere rating of the overcurrent device shall be permitted to be not less than the sum of the continuous load plus the noncontinuous load. [215.3](https://2023.antflix.net#215.3)", + "displayTitle": "215.3 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#215.3" + }, + { + "displayTitle": "215.4 Feeders With Common Neutral Conductor", + "children": [ + { + "body": "Up to three sets of 3-wire feeders or two sets of 4-wire or 5-wire feeders shall be permitted to utilize a common neutral. [215.4_(A)](https://2023.antflix.net#215.4_(A))", + "displayTitle": "(A) Feeders With Common Neutral", + "children": [], + "url": "https://2023.antflix.net#215.4_(A)" + }, + { + "body": "Where installed in a metal raceway or other metal enclosure, all conductors of all feeders using a common neutral conductor shall be enclosed within the same raceway or other enclosure as required in 300.20. [215.4_(B)](https://2023.antflix.net#215.4_(B))", + "displayTitle": "(B) In Metal Raceway or Enclosure", + "children": [], + "url": "https://2023.antflix.net#215.4_(B)" + } + ], + "url": "https://2023.antflix.net#215.4" + }, + { + "body": "If required by the authority having jurisdiction, a diagram showing feeder details shall be provided prior to the installation of the feeders. Such a diagram shall show the area in square feet of the building or other structure supplied by each feeder, the total calculated load before applying demand factors, the demand factors used, the calculated load after applying demand factors, and the size and type of conductors to be used. [215.5](https://2023.antflix.net#215.5)", + "displayTitle": "215.5 Diagrams of Feeders", + "children": [], + "url": "https://2023.antflix.net#215.5" + }, + { + "body": "Where a feeder supplies branch circuits in which equipment grounding conductors are required, the feeder shall include or provide an equipment grounding conductor, to which the equipment grounding conductors of the branch circuits shall be connected. Where the feeder supplies a separate building or structure, the requirements of 250.32 shall apply. [215.6](https://2023.antflix.net#215.6)", + "displayTitle": "215.6 Feeder Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#215.6" + }, + { + "body": "Two-wire dc circuits and ac circuits of two or more ungrounded conductors shall be permitted to be tapped from the ungrounded conductors of circuits having a grounded neutral conductor. Switching devices in each tapped circuit shall have a pole in each ungrounded conductor. [215.7](https://2023.antflix.net#215.7)", + "displayTitle": "215.7 Ungrounded Conductors Tapped From Grounded Systems", + "children": [], + "url": "https://2023.antflix.net#215.7" + }, + { + "body": "Feeders shall be permitted to be protected by a listed ground-fault circuit interrupter installed in a readily accessible location in lieu of the provisions for such interrupters as specified in 210.8 and 590.6(A). [215.9](https://2023.antflix.net#215.9)", + "displayTitle": "215.9 Ground-Fault Circuit-Interrupter Protection for Personnel", + "children": [], + "url": "https://2023.antflix.net#215.9" + }, + { + "body": "Each feeder disconnect rated 1000 amperes or more and installed on solidly grounded wye electrical systems of more than 150 volts to ground, but not exceeding 1000 volts phase-to-phase, shall be provided with ground-fault protection of equipment in accordance with 230.95. Informational Note: See 517.17 for buildings that contain health care occupancies. Exception No. 1: This section shall not apply to a disconnecting means for a continuous industrial process where a nonorderly shutdown will introduce additional or increased hazards. Exception No. 2: This section shall not apply if ground-fault protection of equipment is provided on the supply side of the feeder and on the load side of any transformer supplying the feeder. Exception No. 3: If temporary feeder conductors are used to connect a generator to a facility for repair, maintenance, or emergencies, ground-fault protection of equipment shall not be required. Temporary feeders without ground-fault protection shall be permitted for the time period necessary but shall not exceed 90 days. [215.10](https://2023.antflix.net#215.10)", + "displayTitle": "215.10 Ground-Fault Protection of Equipment", + "children": [], + "url": "https://2023.antflix.net#215.10" + }, + { + "body": "Feeders shall not be derived from autotransformers unless the system supplied has a grounded conductor that is electrically connected to a grounded conductor of the system supplying the autotransformer. Exception No. 1: An autotransformer shall be permitted without the connection to a grounded conductor where transforming from a nominal 208 volts to a nominal 240-volt supply or similarly from 240 volts to 208 volts. Exception No. 2: In industrial occupancies, where conditions of maintenance and supervision ensure that only qualified persons service the installation, autotransformers shall be permitted to supply nominal 600-volt loads from nominal 480-volt systems, and 480-volt loads from nominal 600-volt systems, without the connection to a similar grounded conductor. [215.11](https://2023.antflix.net#215.11)", + "displayTitle": "215.11 Circuits Derived From Autotransformers", + "children": [], + "url": "https://2023.antflix.net#215.11" + }, + { + "displayTitle": "215.12 Identification for Feeders", + "children": [ + { + "body": "The grounded conductor of a feeder, if insulated, shall be identified in accordance with 200.6. [215.12_(A)](https://2023.antflix.net#215.12_(A))", + "displayTitle": "(A) Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#215.12_(A)" + }, + { + "body": "The equipment grounding conductor shall be identified in accordance with 250.119. [215.12_(B)](https://2023.antflix.net#215.12_(B))", + "displayTitle": "(B) Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#215.12_(B)" + }, + { + "body": "Ungrounded conductors shall be identified in accordance with 215.12(C)(1) or (C)(2), as applicable. [215.12_(C)](https://2023.antflix.net#215.12_(C))", + "displayTitle": "(C) Identification of Ungrounded Conductors", + "children": [ + { + "body": "Where the premises wiring system has feeders supplied from more than one nominal voltage system, each ungrounded conductor of a feeder shall be identified by phase or line and system at all termination, connection, and splice points in compliance with 215.12(C)(1)(a) and (C)(1)(b). Means of Identification. The means of identification shall be permitted to be by separate color coding, marking tape, tagging, or other approved means.Posting of Identification Means. The method utilized for conductors originating within each feeder panelboard or similar feeder distribution equipment shall be documented in a manner that is readily available or shall be permanently posted at each feeder panelboard or similar feeder distribution equipment. [215.12_(C)_(1)](https://2023.antflix.net#215.12_(C)_(1))", + "displayTitle": "(1) Feeders Supplied From More Than One Nominal Voltage System", + "children": [], + "url": "https://2023.antflix.net#215.12_(C)_(1)" + }, + { + "body": "Where a feeder is supplied from a dc system operating at more than 60 volts, each ungrounded conductor of 4 AWG or larger shall be identified by polarity at all termination, connection, and splice points by marking tape, tagging, or other approved means; each ungrounded conductor of 6 AWG or smaller shall be identified by polarity at all termination, connection, and splice points in compliance with 215.12(C)(2)(a) and (C)(2)(b). The identification methods utilized for conductors originating within each feeder panelboard or similar feeder distribution equipment shall be documented in a manner that is readily available or shall be permanently posted at each feeder panelboard or similar feeder distribution equipment. Positive Polarity, Sizes 6 AWG or Smaller. Where the positive polarity of a dc system does not serve as the connection for the grounded conductor, each positive ungrounded conductor shall be identified by one of the following means:A continuous red outer finishA continuous red stripe durably marked along the conductor's entire length on insulation of a color other than green, white, gray, or blackImprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray, or black, and repeated at intervals not exceeding 610 mm (24 in.) in accordance with 310.8(B)An approved permanent marking means such as sleeving or shrink-tubing that is suitable for the conductor size, at all termination, connection, and splice points, with imprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray, or blackNegative Polarity, Sizes 6 AWG or Smaller. Where the negative polarity of a dc system does not serve as the connection for the grounded conductor, each negative ungrounded conductor shall be identified by one of the following means:A continuous black outer finishA continuous black stripe durably marked along the conductor's entire length on insulation of a color other than green, white, gray, or redImprinted minus signs (\u2014) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red, and repeated at intervals not exceeding 610 mm (24 in.) in accordance with 310.8(B)An approved permanent marking means such as sleeving or shrink-tubing that is suitable for the conductor size, at all termination, connection, and splice points, with imprinted minus signs (\u2014) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red [215.12_(C)_(2)](https://2023.antflix.net#215.12_(C)_(2))", + "displayTitle": "(2) Feeders Supplied From Direct-Current Systems", + "children": [], + "url": "https://2023.antflix.net#215.12_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#215.12_(C)" + } + ], + "url": "https://2023.antflix.net#215.12" + }, + { + "body": "Barriers shall be placed such that no energized, uninsulated, ungrounded busbar or terminal is exposed to inadvertent contact by persons or maintenance equipment while servicing load terminations in panelboards, switchboards, switchgear, or motor control centers supplied by feeder taps in 240.21(B) or transformer secondary conductors in 240.21(C) when the disconnecting device, to which the tap conductors are terminated, is in the open position. [215.15](https://2023.antflix.net#215.15)", + "displayTitle": "215.15 Barriers", + "children": [], + "url": "https://2023.antflix.net#215.15" + }, + { + "displayTitle": "215.18 Surge Protection", + "children": [ + { + "body": "Where a feeder supplies any of the following, a surge-protective device (SPD) shall be installed: Dwelling unitsDormitory unitsGuest rooms and guest suites of hotels and motelsAreas of nursing homes and limited-care facilities used exclusively as patient sleeping rooms [215.18_(A)](https://2023.antflix.net#215.18_(A))", + "displayTitle": "(A) Surge-Protective Device", + "children": [], + "url": "https://2023.antflix.net#215.18_(A)" + }, + { + "body": "The SPD shall be installed in or adjacent to distribution equipment, connected to the load side of the feeder, that contains branch circuit overcurrent protective device(s) that supply the locations specified in 215.18(A). Informational Note: Surge protection is most effective when closest to the branch circuit. Surges can be generated from multiple sources including, but not limited to, lightning, the electric utility, or utilization equipment. [215.18_(B)](https://2023.antflix.net#215.18_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#215.18_(B)" + }, + { + "body": "The SPD shall be a Type 1 or Type 2 SPD. [215.18_(C)](https://2023.antflix.net#215.18_(C))", + "displayTitle": "(C) Type", + "children": [], + "url": "https://2023.antflix.net#215.18_(C)" + }, + { + "body": "Where the distribution equipment supplied by the feeder is replaced, all of the requirements of this section shall apply. [215.18_(D)](https://2023.antflix.net#215.18_(D))", + "displayTitle": "(D) Replacement", + "children": [], + "url": "https://2023.antflix.net#215.18_(D)" + }, + { + "body": "SPDs shall have a nominal discharge current rating (In) of not less than 10kA. [215.18_(E)](https://2023.antflix.net#215.18_(E))", + "displayTitle": "(E) Ratings", + "children": [], + "url": "https://2023.antflix.net#215.18_(E)" + } + ], + "url": "https://2023.antflix.net#215.18" + } + ], + "url": "https://2023.antflix.net#215" + }, + { + "displayTitle": "Article 220 Branch-Circuit, Feeder, and Service Load Calculations", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_0_I" + }, + { + "body": "This article provides requirements for calculating branch-circuit, feeder, and service loads. Part I provides general requirements for calculation methods. Part II provides calculation methods for branch-circuit loads. Part III and Part IV provide calculation methods for feeder and service loads. Part V provides calculation methods for farm loads. Part VI provides calculation methods for health care facilities. Part VII provides calculation methods for marinas, boatyards, floating buildings, and commercial and noncommercial docking facilities. Informational Note No. 1: See Informative Annex D for examples. Informational Note No. 2: See Informational Note Figure 220.1 for information on the organization of this article. Informational Note Figure 220.1 Branch-Circuit, Feeder, and Service Load Calculation Methods. [220.1](https://2023.antflix.net#220.1)", + "displayTitle": "220.1 Scope", + "children": [], + "url": "https://2023.antflix.net#220.1" + }, + { + "body": "Table 220.3 shall provide references for specific-purpose calculation requirements not located in Chapters 5, 6, or 7 that amend or supplement the requirements of this article. Table 220.3 Specific-Purpose Calculation References Calculation Article Section (or Part) Air-conditioning and refrigerating equipment, branch-circuit conductor sizing 440 Part IV Capacitors 460 460.8 Fixed electric heating equipment for pipelines and vessels, branch-circuit sizing 427 427.4 Fixed electric space-heating equipment, branch-circuit sizing 424 424.3 Fixed outdoor electric deicing and snow-melting equipment, branch-circuit sizing 426 426.4 Fixed resistance and electrode industrial process heating equipment 425 425.4 Motors, feeder demand factor 430 430.26 Motors, multimotor and combination-load equipment 430 430.25 Motors, several motors or a motor(s) and other load(s) 430 430.24 Over 1000-volt ac and 1500-volt dc branch-circuit calculations 235 235.19 Over 1000-volt feeder calculations 215 215.2(B) Phase converters, conductors 455 455.6 Storage-type water heaters 422 422.11 [220.3](https://2023.antflix.net#220.3)", + "displayTitle": "220.3 Other Articles for Specific-Purpose Calculations", + "children": [], + "url": "https://2023.antflix.net#220.3" + }, + { + "displayTitle": "220.5 Calculations", + "children": [ + { + "body": "Unless other voltages are specified, for purposes of calculating branch-circuit and feeder loads, nominal system voltages of 120, 120/240, 208Y/120, 240, 347, 480Y/277, 480, 600Y/347, and 600 volts shall be used. [220.5_(A)](https://2023.antflix.net#220.5_(A))", + "displayTitle": "(A) Voltages", + "children": [], + "url": "https://2023.antflix.net#220.5_(A)" + }, + { + "body": "Calculations shall be permitted to be rounded to the nearest whole ampere, with decimal fractions smaller than 0.5 dropped. [220.5_(B)](https://2023.antflix.net#220.5_(B))", + "displayTitle": "(B) Fractions of an Ampere", + "children": [], + "url": "https://2023.antflix.net#220.5_(B)" + }, + { + "body": "The floor area for each floor shall be calculated from the outside dimensions of the building, dwelling unit, or other area involved. For dwelling units, the calculated floor area shall not include open porches or unfinished areas not adaptable for future use as a habitable room or occupiable space. [220.5_(C)](https://2023.antflix.net#220.5_(C))", + "displayTitle": "(C) Floor Area", + "children": [], + "url": "https://2023.antflix.net#220.5_(C)" + } + ], + "url": "https://2023.antflix.net#220.5" + }, + { + "displayTitle": "Part II Branch-Circuit Load Calculations", + "children": [], + "url": "https://2023.antflix.net#divider_0_II" + }, + { + "body": "Branch-circuit loads shall be calculated in accordance with the following sections: 220.14 for other loads - all occupancies220.16 for additions to existing installations220.41 for dwelling units220.42 for lighting loads for non-dwelling occupancies220.44 for hotel and motel occupancies [220.10](https://2023.antflix.net#220.10)", + "displayTitle": "220.10 General", + "children": [], + "url": "https://2023.antflix.net#220.10" + }, + { + "body": "The total load on a branch circuit shall not exceed the rating of the branch circuit nor the maximum loads specified in 220.11(A) through (C) under the conditions specified therein. [220.11](https://2023.antflix.net#220.11)", + "displayTitle": "220.11 Maximum Load", + "children": [ + { + "body": "Where a circuit supplies only motor-operated loads, the conductor sizing requirement specified in 430.22 shall apply. Where a circuit supplies only air-conditioning equipment, refrigerating equipment, or both, the requirements of 440.6 shall apply. For circuits supplying loads consisting of motor-operated utilization equipment that is fastened in place and has a motor larger than 1/8 hp in combination with other loads, the total calculated load shall be based on 125 percent of the largest motor load plus the sum of the other loads in accordance with 430.24. [220.11_(A)](https://2023.antflix.net#220.11_(A))", + "displayTitle": "(A) Motor-Operated and Combination Loads", + "children": [], + "url": "https://2023.antflix.net#220.11_(A)" + }, + { + "body": "For circuits supplying lighting units that have ballasts, transformers, autotransformers, or LED drivers, the calculated load shall be based on the total ampere ratings of such units and not on the total watts of the lamps. [220.11_(B)](https://2023.antflix.net#220.11_(B))", + "displayTitle": "(B) Inductive and LED Lighting Loads", + "children": [], + "url": "https://2023.antflix.net#220.11_(B)" + }, + { + "body": "Applying demand factors for ranges, wall-mounted ovens, counter-mounted cooking units, and other household cooking appliance loads in excess of 13/4 kW shall be permitted in accordance with Table 220.55, including Notes 4, 5, and 6. [220.11_(C)](https://2023.antflix.net#220.11_(C))", + "displayTitle": "(C) Electric Cooking Appliances", + "children": [], + "url": "https://2023.antflix.net#220.11_(C)" + } + ], + "url": "https://2023.antflix.net#220.11" + }, + { + "body": "Branch-circuit load calculations shall include calculation of a minimum load on each outlet as calculated in 220.14(A) through (K) and then summed to establish the load on the branch circuit. In all occupancies, the minimum load for each outlet for general-use receptacles and outlets not used for general illumination shall not be less than that calculated in 220.14(A) through (K), with the loads shown being based on nominal branch-circuit voltages. Exception: The loads of outlets serving switchboards and switching frames in telephone exchanges shall be waived from the calculations. [220.14](https://2023.antflix.net#220.14)", + "displayTitle": "220.14 Other Loads - All Occupancies", + "children": [ + { + "body": "An outlet for a specific appliance or other load not covered in 220.14(B) through (K) shall be calculated based on the ampere rating of the appliance or load served. [220.14_(A)](https://2023.antflix.net#220.14_(A))", + "displayTitle": "(A) Specific Appliances or Loads", + "children": [], + "url": "https://2023.antflix.net#220.14_(A)" + }, + { + "body": "Load calculations shall be permitted as specified in 220.54 for electric dryers and in 220.55 for electric ranges and other cooking appliances. [220.14_(B)](https://2023.antflix.net#220.14_(B))", + "displayTitle": "(B) Electric Dryers and Electric Cooking Appliances in Dwellings and Household Cooking Appliances Used in Instructional Programs", + "children": [], + "url": "https://2023.antflix.net#220.14_(B)" + }, + { + "body": "The conductor sizing requirements specified in 430.22, 430.24, and 440.6 shall be used to determine the loads for motor outlets. [220.14_(C)](https://2023.antflix.net#220.14_(C))", + "displayTitle": "(C) Motor Outlets", + "children": [], + "url": "https://2023.antflix.net#220.14_(C)" + }, + { + "body": "An outlet supplying a luminaire(s) shall be calculated based on the maximum volt-ampere rating of the equipment and lamps for which the luminaire(s) is rated. [220.14_(D)](https://2023.antflix.net#220.14_(D))", + "displayTitle": "(D) Luminaires", + "children": [], + "url": "https://2023.antflix.net#220.14_(D)" + }, + { + "body": "Outlets for heavy-duty lampholders shall be calculated at a minimum of 600 volt-amperes. [220.14_(E)](https://2023.antflix.net#220.14_(E))", + "displayTitle": "(E) Heavy-Duty Lampholders", + "children": [], + "url": "https://2023.antflix.net#220.14_(E)" + }, + { + "body": "Sign and outline lighting outlets shall be calculated at a minimum of 1200 volt-amperes for each required branch circuit specified in 600.5(A). [220.14_(F)](https://2023.antflix.net#220.14_(F))", + "displayTitle": "(F) Sign and Outline Lighting", + "children": [], + "url": "https://2023.antflix.net#220.14_(F)" + }, + { + "body": "Show windows shall be calculated in accordance with either of the following: The unit load per outlet as required in other provisions of this sectionAt 200 volt-amperes per linear 300 mm (1 ft) of show window [220.14_(G)](https://2023.antflix.net#220.14_(G))", + "displayTitle": "(G) Show Windows", + "children": [], + "url": "https://2023.antflix.net#220.14_(G)" + }, + { + "body": "Fixed multioutlet assemblies used in other than dwelling units or the guest rooms or guest suites of hotels or motels shall be calculated in accordance with the following: Where appliances are unlikely to be used simultaneously, each 1.5 m (5 ft) or fraction thereof of each separate and continuous length shall be considered as one outlet of not less than 180 volt-amperes.Where appliances are likely to be used simultaneously, each 300 mm (1 ft) or fraction thereof shall be considered as an outlet of not less than 180 volt-amperes.For the purposes of this section, the calculation shall be permitted to be based on the portion that contains receptacles. [220.14_(H)](https://2023.antflix.net#220.14_(H))", + "displayTitle": "(H) Fixed Multioutlet Assemblies", + "children": [], + "url": "https://2023.antflix.net#220.14_(H)" + }, + { + "body": "Except as covered in 220.41 and 220.14(J), receptacle outlets shall be calculated at not less than 180 volt-amperes for each single or for each multiple receptacle on one yoke. A single piece of equipment consisting of a multiple receptacle comprised of four or more receptacles shall be calculated at not less than 90 volt-amperes per receptacle. This provision shall not be applicable to the receptacle outlets specified in 210.11(C)(1) and (C)(2). [220.14_(I)](https://2023.antflix.net#220.14_(I))", + "displayTitle": "(I) Receptacle Outlets", + "children": [], + "url": "https://2023.antflix.net#220.14_(I)" + }, + { + "body": "In office buildings, the receptacle loads shall be calculated to be the larger of the following: The calculated load from 220.14(I)11 volt-amperes/m2 (1 volt-ampere/ft2) [220.14_(J)](https://2023.antflix.net#220.14_(J))", + "displayTitle": "(J) Receptacle Outlets in Office Buildings", + "children": [], + "url": "https://2023.antflix.net#220.14_(J)" + }, + { + "body": "Other outlets not covered in 220.14(A) through (J) shall be calculated based on 180 volt-amperes per outlet. [220.14_(K)](https://2023.antflix.net#220.14_(K))", + "displayTitle": "(K) Other Outlets", + "children": [], + "url": "https://2023.antflix.net#220.14_(K)" + } + ], + "url": "https://2023.antflix.net#220.14" + }, + { + "displayTitle": "220.16 Loads for Additions to Existing Installations", + "children": [ + { + "body": "Loads added to an existing dwelling unit(s) shall comply with the following as applicable: Loads for structural additions to an existing dwelling unit or for a previously unwired portion of an existing dwelling unit shall be calculated in accordance with 220.14.Loads for new circuits or extended circuits in previously wired dwelling units shall be calculated in accordance with 220.14. [220.16_(A)](https://2023.antflix.net#220.16_(A))", + "displayTitle": "(A) Dwelling Units", + "children": [], + "url": "https://2023.antflix.net#220.16_(A)" + }, + { + "body": "Loads for new circuits or extended circuits in other than dwelling units shall be calculated in accordance with either 220.42 or 220.14, as applicable. [220.16_(B)](https://2023.antflix.net#220.16_(B))", + "displayTitle": "(B) Other Than Dwelling Units", + "children": [], + "url": "https://2023.antflix.net#220.16_(B)" + } + ], + "url": "https://2023.antflix.net#220.16" + }, + { + "displayTitle": "Part III Feeder and Service Load Calculations", + "children": [], + "url": "https://2023.antflix.net#divider_0_III" + }, + { + "body": "The calculated load of a feeder or service shall not be less than the sum of the loads on the branch circuits supplied, as determined by Part II of this article, after any applicable demand factors permitted or required by Part III, IV, V, VI, or VII have been applied. Informational Note No. 1: See Informative Annex D, Examples D1(a) through D10, for examples of feeder and service load calculations. Informational Note No. 2: See 220.11(B) for the maximum load in amperes permitted for lighting units operating at less than 100 percent power factor. [220.40](https://2023.antflix.net#220.40)", + "displayTitle": "220.40 General", + "children": [], + "url": "https://2023.antflix.net#220.40" + }, + { + "body": "In one-family, two-family, and multifamily dwellings, the minimum unit load shall be not less than 33 volt-amperes/m2 (3 volt-amperes/ft2). Unit loads include the following lighting and receptacle outlets, and no additional load calculations shall be required:All general-use receptacle outlets of 20-ampere rating or less, including receptacles connected to the circuits specified in 210.11(C)(3) and (C)(4)The receptacle outlets specified in 210.52(E) and (G)The lighting outlets specified in 210.70The minimum lighting load shall be determined using the minimum unit load and the floor area as determined in 220.5(C) for dwelling occupancies. Motors rated less than 1/8 hp and connected to a lighting circuit shall be considered part of the minimum lighting load. [220.41](https://2023.antflix.net#220.41)", + "displayTitle": "220.41 Dwelling Units, Minimum Unit Load", + "children": [], + "url": "https://2023.antflix.net#220.41" + }, + { + "displayTitle": "220.42 Lighting Load for Non-Dwelling Occupancies", + "children": [ + { + "body": "A unit load of not less than that specified in Table 220.42(A) for non-dwelling occupancies and the floor area determined in 220.5(C) shall be used to calculate the minimum lighting load. Motors rated less than 1/8 HP and connected to a lighting circuit shall be considered general lighting load. Informational Note: The unit values of Table 220.42(A) are based on minimum load conditions and 80 percent power factor and might not provide sufficient capacity for the installation contemplated.\nTable 220.42(A) General Lighting Loads by Non-Dwelling Occupancy Type of Occupancy Unit Load Volt-amperes/m2 Volt-amperes/ft2 Automotive facility 16 1.5 Convention center 15 1.4 Courthouse 15 1.4 Dormitory 16 1.5 Exercise center 15 1.4 Fire station 14 1.3 Gymnasium1 18 1.7 Health care clinic 17 1.6 Hospital 17 1.6 Hotel or motel, or apartment house without provisions for cooking by tenants2 18 1.7 Library 16 1.5 Manufacturing facility3 24 2.2 Motion picture theater 17 1.6 Museum 17 1.6 Office4 14 1.3 Parking garage5 3 0.3 Penitentiary 13 1.2 Performing arts theater 16 1.5 Police station 14 1.3 Post office 17 1.6 Religious facility 24 2.2 Restaurant6 16 1.5 Retail7,8 20 1.9 School/university 16 1.5 Sports arena 16 1.5 Town hall 15 1.4 Transportation 13 1.2 Warehouse 13 1.2 Workshop 18 1.7 Note: The 125 percent multiplier for a continuous load as specified in 210.20(A) is included, therefore no additional multiplier shall be required when using the unit loads in this table for calculating the minimum lighting load for a specified occupancy.1Armories and auditoriums are considered gymnasium-type occupancies.2Lodge rooms are similar to hotels and motels.3Industrial commercial loft buildings are considered manufacturing-type occupancies.4Banks are office-type occupancies.5Commercial (storage) garages are considered parking garage occupancies.6Clubs are considered restaurant occupancies.7Barber shops and beauty parlors are considered retail occupancies.8Stores are considered retail occupancies. [220.42_(A)](https://2023.antflix.net#220.42_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#220.42_(A)" + }, + { + "body": "Where the building is designed and constructed to comply with an energy code adopted by the local authority, the lighting load shall be permitted to be calculated using the unit values specified in the energy code where the following conditions are met: A power monitoring system is installed that will provide continuous information regarding the total general lighting load of the building.The power monitoring system will be set with alarm values to alert the building owner or manager if the lighting load exceeds the values set by the energy code. Automatic means to take action to reduce the connected load shall be permitted.The demand factors specified in 220.45 are not applied to the general lighting load.The continuous load multiplier of 125 percent shall be applied. [220.42_(B)](https://2023.antflix.net#220.42_(B))", + "displayTitle": "(B) Energy Code", + "children": [], + "url": "https://2023.antflix.net#220.42_(B)" + } + ], + "url": "https://2023.antflix.net#220.42" + }, + { + "body": "In office buildings, the receptacle loads shall be calculated to be the larger of the following: The calculated load from 220.14(1) after Table 220.47 demand factors have been applied11 volt-amperes/m2 or 1 volt-ampere/ft2 [220.43](https://2023.antflix.net#220.43)", + "displayTitle": "220.43 Office Buildings", + "children": [], + "url": "https://2023.antflix.net#220.43" + }, + { + "body": "In guest rooms or guest suites of hotels and motels, the following lighting and receptacle outlets are included in the minimum unit load in Table 220.42(A), and no additional load calculations shall be required for such outlets: All general-use receptacle outlets of 20-ampere rating or less, including receptacles connected to the circuits in 210.11(C)(3) and (C)(4)The receptacle outlets specified in 210.52(E)(3)The lighting outlets specified in 210.70 [220.44](https://2023.antflix.net#220.44)", + "displayTitle": "220.44 Hotel and Motel Occupancies", + "children": [], + "url": "https://2023.antflix.net#220.44" + }, + { + "body": "The demand factors specified in Table 220.45 shall apply to that portion of the total branch-circuit load calculated for general illumination. They shall not be applied in determining the number of branch circuits for general illumination. Table 220.45 Lighting Load Demand Factors Type of Occupancy Portion of Lighting Load to Which Demand Factor Applies (Volt-Amperes) Demand Factor (%) Dwelling units First 3000 at 100 From 3001 to 120,000 at 35 Remainder over 120,000 at 25 Hotels and motels, including apartment houses without provision for cooking by tenants* First 20,000 or less at 60 From 20,001 to 100,000 at 50 Remainder over 100,000 at 35 Warehouses (storage) First 12,500 or less at 100 Remainder over 12,500 at 50 All others Total volt-amperes 100 *The demand factors of this table shall not apply to the calculated load of feeders or services supplying areas in hotels and motels where the entire lighting is likely to be used at one time, as in ballrooms or dining rooms. [220.45](https://2023.antflix.net#220.45)", + "displayTitle": "220.45 General Lighting", + "children": [], + "url": "https://2023.antflix.net#220.45" + }, + { + "displayTitle": "220.46 Show-Window and Track Lighting", + "children": [ + { + "body": "For show-window lighting, a load of not less than 660 volt-amperes/linear meter or 200 volt-amperes/linear foot shall be included for a show window, measured horizontally along its base. Informational Note: See 220.14(G) for branch circuits supplying show windows. [220.46_(A)](https://2023.antflix.net#220.46_(A))", + "displayTitle": "(A) Show Windows", + "children": [], + "url": "https://2023.antflix.net#220.46_(A)" + }, + { + "body": "For track lighting in other than dwelling units or guest rooms or guest suites of hotels or motels, an additional load of 150 volt-amperes shall be included for every 600 mm (2 ft) of lighting track or fraction thereof. Where multicircuit track is installed, the load shall be considered to be divided equally between the track circuits. Exception: If the track lighting is supplied through a device that limits the current to the track, the load shall be permitted to be calculated based on the rating of the device used to limit the current. [220.46_(B)](https://2023.antflix.net#220.46_(B))", + "displayTitle": "(B) Track Lighting", + "children": [], + "url": "https://2023.antflix.net#220.46_(B)" + } + ], + "url": "https://2023.antflix.net#220.46" + }, + { + "body": "Receptacle loads calculated in accordance with 220.14(H) and (I) shall be permitted to be made subject to the demand factors given in Table 220.45 or Table 220.47. Table 220.47 Demand Factors for Non-Dwelling Receptacle Loads Portion of Receptacle Load to Which Demand Factor Applies (Volt-Amperes) Demand Factor (%) First 10 kVA or less at 100 Remainder over 10 kVA at 50 [220.47](https://2023.antflix.net#220.47)", + "displayTitle": "220.47 Receptacle Loads - Other Than Dwelling Units", + "children": [], + "url": "https://2023.antflix.net#220.47" + }, + { + "displayTitle": "220.50 Motors and Air-Conditioning Equipment", + "children": [ + { + "body": "The conductor sizing requirements specified in 430.24 and 430.25 and the feeder demand factor calculation method specified in 430.26 shall be used to determine motor loads. [220.50_(A)](https://2023.antflix.net#220.50_(A))", + "displayTitle": "(A) Motors", + "children": [], + "url": "https://2023.antflix.net#220.50_(A)" + }, + { + "body": "The conductor sizing requirements specified in Part IV of Article 440 shall be used to determine air-conditioning loads for hermetic refrigerant motor-compressors. [220.50_(B)](https://2023.antflix.net#220.50_(B))", + "displayTitle": "(B) Air-Conditioning Equipment", + "children": [], + "url": "https://2023.antflix.net#220.50_(B)" + } + ], + "url": "https://2023.antflix.net#220.50" + }, + { + "body": "Fixed electric space-heating loads shall be calculated at 100 percent of the total connected load. However, in no case shall a feeder or service load current rating be less than the rating of the largest branch circuit supplied. Exception: If reduced loading of the conductors results from units operating on duty-cycle or intermittently, or from all units not operating at the same time, the authority having jurisdiction shall be permitted to grant permission for feeder and service conductors to have an ampacity less than 100 percent if the conductors have an ampacity for the load so determined. [220.51](https://2023.antflix.net#220.51)", + "displayTitle": "220.51 Fixed Electric Space Heating", + "children": [], + "url": "https://2023.antflix.net#220.51" + }, + { + "displayTitle": "220.52 Small-Appliance and Laundry Loads - Dwelling Unit", + "children": [ + { + "body": "In each dwelling unit, the load shall be calculated at 1500 volt-amperes for each 2-wire small-appliance branch circuit as covered by 210.11(C)(1). Where the load is subdivided through two or more feeders, the calculated load for each shall include not less than 1500 volt-amperes for each 2-wire small-appliance branch circuit. These loads shall be permitted to be included with the general lighting load and subjected to the demand factors provided in Table 220.45. Exception: The individual branch circuit permitted by 210.52(B)(1), Exception No. 2, shall be permitted to be excluded from the calculation required by 220.52. [220.52_(A)](https://2023.antflix.net#220.52_(A))", + "displayTitle": "(A) Small-Appliance Circuit Load", + "children": [], + "url": "https://2023.antflix.net#220.52_(A)" + }, + { + "body": "A load of not less than 1500 volt-amperes shall be included for each 2-wire laundry branch circuit installed as covered by 210.11(C)(2). This load shall be permitted to be included with the general lighting load and shall be subjected to the demand factors provided in Table 220.45. [220.52_(B)](https://2023.antflix.net#220.52_(B))", + "displayTitle": "(B) Laundry Circuit Load", + "children": [], + "url": "https://2023.antflix.net#220.52_(B)" + } + ], + "url": "https://2023.antflix.net#220.52" + }, + { + "body": "Applying a demand factor of 75 percent to the nameplate rating load of four or more appliances rated 1/4 hp or greater, or 500 watts or greater, that are fastened in place, and that are served by the same feeder or service in a one-family, two-family, or multifamily dwelling shall be permitted. This demand factor shall not apply to the following: Household electric cooking equipment that is fastened in placeClothes dryersSpace heating equipmentAir-conditioning equipmentElectric vehicle supply equipment (EVSE) [220.53](https://2023.antflix.net#220.53)", + "displayTitle": "220.53 Appliance Load - Dwelling Unit(s)", + "children": [], + "url": "https://2023.antflix.net#220.53" + }, + { + "body": "The load for household electric clothes dryers in a dwelling unit(s) shall be either 5000 watts (volt-amperes) or the nameplate rating, whichever is larger, for each dryer served. The use of the demand factors in Table 220.54 shall be permitted. Where two or more single-phase dryers are supplied by a 3-phase, 4-wire feeder or service, the total load shall be calculated on the basis of twice the maximum number connected between any two phases. Kilovolt-amperes (kVA) shall be considered equivalent to kilowatts (kW) for loads calculated in this section. Table 220.54 Demand Factors for Household Electric Clothes Dryers Number of Dryers Demand Factor (%) 1\u20144 100 5 85 6 75 7 65 8 60 9 55 10 50 11 47 12\u201423 47% minus 1% for each dryer exceeding 11 24\u201442 35% minus 0.5% for each dryer exceeding 23 43 and over 25% [220.54](https://2023.antflix.net#220.54)", + "displayTitle": "220.54 Electric Clothes Dryers - Dwelling Unit(s)", + "children": [], + "url": "https://2023.antflix.net#220.54" + }, + { + "body": "The load for household electric ranges, wall-mounted ovens, counter-mounted cooking units, and other household cooking appliances individually rated in excess of 13/4 kW shall be permitted to be calculated in accordance with Table 220.55. Kilovolt-amperes (kVA) shall be considered equivalent to kilowatts (kW) for loads calculated under this section. Where two or more single-phase ranges are supplied by a 3-phase, 4-wire feeder or service, the total load shall be calculated on the basis of twice the maximum number connected between any two phases. Informational Note No. 1: See Informative Annex D for examples. Informational Note No. 2: See Table 220.56 for demand factors for commercial cooking equipment. Table 220.55 Demand Factors and Loads for Household Electric Ranges, Wall-Mounted Ovens, Counter-Mounted Cooking Units, and Other Household Cooking Appliances over 13/4 kW Rating (Column C to be used in all cases except as otherwise permitted in Note 3.) Number of Appliances Demand Factor (%) (See Notes) Column C Maximum Demand (kW)(See Notes) (Not over 12 kW Rating) Column A (Less than 31/2 kW Rating) Column B (31/2 kW through 83/4 kW Rating) 1 80 80 8 2 75 65 11 3 70 55 14 4 66 50 17 5 62 45 20 6 59 43 21 7 56 40 22 8 53 36 23 9 51 35 24 10 49 34 25 11 47 32 26 12 45 32 27 13 43 32 28 14 41 32 29 15 40 32 30 16 39 28 31 17 38 28 32 18 37 28 33 19 36 28 34 20 35 28 35 21 34 26 36 22 33 26 37 23 32 26 38 24 31 26 39 25 30 26 40 26\u201430 30 24 15 kW + 1 kW for each range 31\u201440 30 22 41\u201450 30 20 25 kW + 3/4 kW for each range 51\u201460 30 18 61 and over 30 16 Notes:Over 12 kW through 27 kW ranges all of same rating. For ranges individually rated more than 12 kW but not more than 27 kW, the maximum demand in Column C shall be increased 5 percent for each additional kilowatt of rating or major fraction thereof by which the rating of individual ranges exceeds 12 kW.Over 83/4 kW through 27 kW ranges of unequal ratings. For ranges individually rated more than 83/4 kW and of different ratings, but none exceeding 27 kW, an average value of rating shall be calculated by adding together the ratings of all ranges to obtain the total connected load (using 12 kW for any range rated less than 12 kW) and dividing by the total number of ranges. Then the maximum demand in Column C shall be increased 5 percent for each kilowatt or major fraction thereof by which this average value exceeds 12 kW.Over 13/4 kW through 83/4 kW. In lieu of the method provided in Column C, adding the nameplate ratings of all household cooking appliances rated more than 13/4 kW but not more than 83/4 kW and multiplying the sum by the demand factors specified in Column A or Column B for the given number of appliances shall be permitted. Where the rating of cooking appliances falls under both Column A and Column B, the demand factors for each column shall be applied to the appliances for that column, and the results added together.Calculating the branch-circuit load for one range in accordance with Table 220.55 shall be permitted.The branch-circuit load for one wall-mounted oven or one counter-mounted cooking unit shall be the nameplate rating of the appliance.The branch-circuit load for a counter-mounted cooking unit and not more than two wall-mounted ovens, all supplied from a single branch circuit and located in the same room, shall be calculated by adding the nameplate rating of the individual appliances and treating this total as equivalent to one range.This table shall also apply to household cooking appliances rated over 13/4 kW and used in instructional programs. [220.55](https://2023.antflix.net#220.55)", + "displayTitle": "220.55 Electric Cooking Appliances in Dwelling Units and Household Cooking Appliances Used in Instructional Programs", + "children": [], + "url": "https://2023.antflix.net#220.55" + }, + { + "body": "Calculating the load for commercial electric cooking equipment, dishwasher booster heaters, water heaters, and other kitchen equipment in accordance with Table 220.56 shall be permitted. Other kitchen equipment shall include equipment that is fastened in place and rated 1/4 hp or greater, or 500 watts or greater. These demand factors shall be applied to all equipment that has either thermostatic control or intermittent use as kitchen equipment. These demand factors shall not apply to space-heating, ventilating, or air-conditioning equipment. However, in no case shall the feeder or service calculated load be less than the sum of the largest two kitchen equipment loads. Table 220.56 Demand Factors for Kitchen Equipment - Other Than Dwelling Unit(s) Number of Units of Equipment Demand Factor (%) 1 100 2 100 3 90 4 80 5 70 6 and over 65 [220.56](https://2023.antflix.net#220.56)", + "displayTitle": "220.56 Kitchen Equipment - Other Than Dwelling Unit(s)", + "children": [], + "url": "https://2023.antflix.net#220.56" + }, + { + "body": "The EVSE load shall be calculated at either 7200 watts (volt-amperes) or the nameplate rating of the equipment, whichever is larger. [220.57](https://2023.antflix.net#220.57)", + "displayTitle": "220.57 Electric Vehicle Supply Equipment (EVSE) Load", + "children": [], + "url": "https://2023.antflix.net#220.57" + }, + { + "body": "If it is unlikely that two or more noncoincident loads will be in use simultaneously, using only the largest load(s) that will be used at one time for calculating the total load of a feeder or service shall be permitted. If a motor or air-conditioning load is part of the noncoincident load and is not the largest of the noncoincident loads, 125 percent of either the motor load or air-conditioning load, whichever is larger, shall be used in the calculation. [220.60](https://2023.antflix.net#220.60)", + "displayTitle": "220.60 Noncoincident Loads", + "children": [], + "url": "https://2023.antflix.net#220.60" + }, + { + "displayTitle": "220.61 Feeder or Service Neutral Load", + "children": [ + { + "body": "The feeder or service neutral load shall be the maximum unbalance of the load determined by this article. The maximum unbalanced load shall be the maximum net calculated load between the neutral conductor and any one ungrounded conductor. Exception: For 3-wire, 2-phase or 5-wire, 2-phase systems, the maximum unbalanced load shall be the maximum net calculated load between the neutral conductor and any one ungrounded conductor multiplied by 140 percent. [220.61_(A)](https://2023.antflix.net#220.61_(A))", + "displayTitle": "(A) Basic Calculation", + "children": [], + "url": "https://2023.antflix.net#220.61_(A)" + }, + { + "body": "A service or feeder supplying the following loads shall be permitted to have an additional demand factor of 70 percent applied to the amount in 220.61(B)(1) and a portion of the amount in 220.61 (B)(2). [220.61_(B)](https://2023.antflix.net#220.61_(B))", + "displayTitle": "(B) Permitted Reductions", + "children": [ + { + "body": "A feeder or service supplying household electric ranges, wall-mounted ovens, counter-mounted cooking units, and electric dryers, where the maximum unbalanced load has been determined in accordance with Table 220.55 for ranges and Table 220.54 for dryers. [220.61_(B)_(1)](https://2023.antflix.net#220.61_(B)_(1))", + "displayTitle": "(1) Household Electric Ranges, Wall-Mounted Ovens, Counter-Mounted Cooking Units, and Dryers", + "children": [], + "url": "https://2023.antflix.net#220.61_(B)_(1)" + }, + { + "body": "That portion of the unbalanced load in excess of 200 amperes where the feeder or service is supplied from a 3-wire dc or single-phase ac system; a 4-wire, 3-phase system; a 3-wire, 2-phase system; or a 5-wire, 2-phase system. Informational Note: See Informative Annex D, Examples D1(a), D1(b), D2(b), D4(a), and D5(a) for examples of unbalanced feeder or service neutral loads. [220.61_(B)_(2)](https://2023.antflix.net#220.61_(B)_(2))", + "displayTitle": "(2) Unbalanced Load in Excess of 200 Amperes", + "children": [], + "url": "https://2023.antflix.net#220.61_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#220.61_(B)" + }, + { + "body": "There shall be no reduction of the neutral or grounded conductor capacity applied to the amount in 220.61 (C)(1), or portion of the amount in (C)(2), from that determined by the basic calculation: Any portion of a 3-wire circuit consisting of 2 ungrounded conductors and the neutral conductor of a 4-wire, 3-phase, wye-connected systemThat portion consisting of nonlinear loads supplied from a 4-wire, wye-connected, 3-phase systemInformational Note: A 3-phase, 4-wire, wye-connected power system used to supply power to nonlinear loads might necessitate that the power system design allows for the possibility of high harmonic neutral conductor currents. [220.61_(C)](https://2023.antflix.net#220.61_(C))", + "displayTitle": "(C) Prohibited Reductions", + "children": [], + "url": "https://2023.antflix.net#220.61_(C)" + } + ], + "url": "https://2023.antflix.net#220.61" + }, + { + "body": "If an energy management system (EMS) is used to limit the current to a feeder or service in accordance with 750.30, a single value equal to the maximum ampere setpoint of the EMS shall be permitted to be used in load calculations for the feeder or service. The setpoint value of the EMS shall be considered a continuous load for the purposes of load calculations. [220.70](https://2023.antflix.net#220.70)", + "displayTitle": "220.70 Energy Management Systems (EMSs)", + "children": [], + "url": "https://2023.antflix.net#220.70" + }, + { + "displayTitle": "Part IV Optional Feeder and Service Load Calculations", + "children": [], + "url": "https://2023.antflix.net#divider_2_IV" + }, + { + "body": "Optional feeder and service load calculations shall be permitted in accordance with Part IV. [220.80](https://2023.antflix.net#220.80)", + "displayTitle": "220.80 General", + "children": [], + "url": "https://2023.antflix.net#220.80" + }, + { + "displayTitle": "220.82 Dwelling Unit", + "children": [ + { + "body": "This section applies to a dwelling unit having the total connected load served by a single 120/240-volt or 208Y/120-volt set of 3-wire service or feeder conductors with an ampacity of 100 or greater. It shall be permissible to calculate the feeder and service loads in accordance with this section instead of the method specified in Part III of this article. The calculated load shall be the result of adding the loads from 220.82(B) and (C). Feeder and service-entrance conductors whose calculated load is determined by this optional calculation shall be permitted to have the neutral load determined by 220.61. [220.82_(A)](https://2023.antflix.net#220.82_(A))", + "displayTitle": "(A) Feeder and Service Load", + "children": [], + "url": "https://2023.antflix.net#220.82_(A)" + }, + { + "body": "The general calculated load shall be not less than 100 percent of the first 10 kVA plus 40 percent of the remainder of the following loads: 33 volt-amperes/m2 or 3 volt-amperes/ft2 for general lighting and general-use receptacles. The floor area for each floor shall be calculated from the outside dimensions of the dwelling unit. The calculated floor area shall not include open porches, garages, or unused or unfinished spaces not adaptable for future use.1500 volt-amperes for each 2-wire, 20-ampere small-appliance branch circuit and each laundry branch circuit covered in 210.11(C)(1) and (C)(2).The nameplate rating of the following:All appliances that are fastened in place, permanently connected, or located to be on a specific circuitRanges, wall-mounted ovens, counter-mounted cooking unitsClothes dryers that are not connected to the laundry branch circuit specified in 220.82(B)(2)Water heatersThe nameplate ampere or kVA rating of all permanently connected motors not included in 220.82(B)(3). [220.82_(B)](https://2023.antflix.net#220.82_(B))", + "displayTitle": "(B) General Loads", + "children": [], + "url": "https://2023.antflix.net#220.82_(B)" + }, + { + "body": "The largest of the following six selections (load in kVA) shall be included: 100 percent of the nameplate rating(s) of the air conditioning and cooling.100 percent of the nameplate rating(s) of the heat pump when the heat pump is used without any supplemental electric heating.100 percent of the nameplate rating(s) of the heat pump compressor and 65 percent of the supplemental electric heating for central electric space-heating systems. If the heat pump compressor is prevented from operating at the same time as the supplementary heat, it does not need to be added to the supplementary heat for the total central space heating load.65 percent of the nameplate rating(s) of electric space heating if less than four separately controlled units.40 percent of the nameplate rating(s) of electric space heating if four or more separately controlled units.100 percent of the nameplate ratings of electric thermal storage and other heating systems where the usual load is expected to be continuous at the full nameplate value. Systems qualifying under this selection shall not be calculated under any other selection in 220.82(C). [220.82_(C)](https://2023.antflix.net#220.82_(C))", + "displayTitle": "(C) Heating and Air-Conditioning Load", + "children": [], + "url": "https://2023.antflix.net#220.82_(C)" + } + ], + "url": "https://2023.antflix.net#220.82" + }, + { + "body": "This section shall be permitted to be used to determine if the existing service or feeder is of sufficient capacity to serve additional loads. Where the dwelling unit is served by a 120/240-volt or 208Y/120-volt, 3-wire service or feeder, calculating the total load in accordance with 220.83(A) or (B) shall be permitted. [220.83](https://2023.antflix.net#220.83)", + "displayTitle": "220.83 Existing Dwelling Unit", + "children": [ + { + "body": "The percentages listed in Table 220.83(A) shall be used for existing and additional new loads. Load calculations shall include the following:General lighting and general-use receptacles at 33 volt-amperes/m2 or 3 volt-amperes/ft2 as determined by 220.421500 volt-amperes for each 2-wire, 20-ampere small-appliance branch circuit and each laundry branch circuit covered in 210.11(C)(1) and (C)(2)The nameplate rating of the following:All appliances that are fastened in place, permanently connected, or located to be on a specific circuitRanges, wall-mounted ovens, counter-mounted cooking unitsClothes dryers that are not connected to the laundry branch circuit specified in item (2)Water heatersTable 220.83(A) Without Additional Air-Conditioning or Electric Space-Heating Equipment Load (kVA) Percent of Load First 8 kVA of load at 100 Remainder of load at 40 [220.83_(A)](https://2023.antflix.net#220.83_(A))", + "displayTitle": "(A) Where Additional Air-Conditioning Equipment or Electric Space-Heating Equipment Is Not to Be Installed", + "children": [], + "url": "https://2023.antflix.net#220.83_(A)" + }, + { + "body": "The percentages listed in Table 220.83(B) shall be used for existing and additional new loads. The larger connected load of air conditioning or space heating, but not both, shall be used. Other loads shall include the following:General lighting and general-use receptacles at 33 volt-amperes/m2 or 3 volt-amperes/ft2 as determined by 220.421500 volt-amperes for each 2-wire, 20-ampere small-appliance branch circuit and each laundry branch circuit covered in 210.11(C)(1) and (C)(2)The nameplate rating of the following:All appliances that are fastened in place, permanently connected, or located to be on a specific circuitRanges, wall-mounted ovens, counter-mounted cooking unitsClothes dryers that are not connected to the laundry branch circuit specified in item (2)Water heatersTable 220.83(B) With Additional Air-Conditioning or Electric Space-Heating Equipment Load Percent of Load Air-conditioning equipment 100 Central electric space heating 100 Less than four separately controlled space-heating units 100 First 8 kVA of all other loads 100 Remainder of all other loads 40 [220.83_(B)](https://2023.antflix.net#220.83_(B))", + "displayTitle": "(B) Where Additional Air-Conditioning Equipment or Electric Space-Heating Equipment Is to Be Installed", + "children": [], + "url": "https://2023.antflix.net#220.83_(B)" + } + ], + "url": "https://2023.antflix.net#220.83" + }, + { + "displayTitle": "220.84 Multifamily Dwelling", + "children": [ + { + "body": "It shall be permissible to calculate the load of a feeder or service that supplies three or more dwelling units of a multifamily dwelling in accordance with Table 220.84(B) instead of Part III of this article if all the following conditions are met: No dwelling unit is supplied by more than one feeder.Each dwelling unit is equipped with electric cooking equipment.Exception: When the calculated load for multifamily dwellings without electric cooking in Part III of this article exceeds that calculated under Part IV for the identical load plus electric cooking (based on 8 kW per unit), the lesser of the two loads shall be permitted to be used.Each dwelling unit is equipped with either electric space heating or air conditioning, or both. Feeders and service conductors whose calculated load is determined by this optional calculation shall be permitted to have the neutral load determined by 220.61. [220.84_(A)](https://2023.antflix.net#220.84_(A))", + "displayTitle": "(A) Feeder or Service Load", + "children": [], + "url": "https://2023.antflix.net#220.84_(A)" + }, + { + "body": "House loads shall be calculated in accordance with Part III of this article and shall be in addition to the dwelling unit loads calculated in accordance with Table 220.84(B).\nTable 220.84(B) Optional Calculations - Demand Factors for Three or More Multifamily Dwelling Units Number of Dwelling Units Demand Factor % 3\u20145 45 6\u20147 44 8\u201410 43 11 42 12\u201413 41 14\u201415 40 16\u201417 39 18\u201420 38 21 37 22\u201423 36 24\u201425 35 26\u201427 34 28\u201430 33 31 32 32\u201433 31 34\u201436 30 37\u201438 29 39\u201442 28 43\u201445 27 46\u201450 26 51\u201455 25 56\u201461 24 62 and over 23 [220.84_(B)](https://2023.antflix.net#220.84_(B))", + "displayTitle": "(B) House Loads", + "children": [], + "url": "https://2023.antflix.net#220.84_(B)" + }, + { + "body": "The calculated load to which the demand factors of Table 220.84(B) apply shall include the following: 33 volt-amperes/m2 or 3 volt-amperes/ft2 for general lighting and general-use receptacles1500 volt-amperes for each 2-wire, 20-ampere small-appliance branch circuit and each laundry branch circuit covered in 210.11(C)(1) and (C)(2)The nameplate rating of the following:All appliances that are fastened in place, permanently connected, or located to be on a specific circuitRanges, wall-mounted ovens, counter-mounted cooking unitsClothes dryers that are not connected to the laundry branch circuit specified in item (2)Water heatersThe nameplate ampere or kVA rating of all permanently connected motors not included in item (3)The larger of the air-conditioning load or the fixed electric space-heating load [220.84_(C)](https://2023.antflix.net#220.84_(C))", + "displayTitle": "(C) Calculated Loads", + "children": [], + "url": "https://2023.antflix.net#220.84_(C)" + } + ], + "url": "https://2023.antflix.net#220.84" + }, + { + "body": "Where two dwelling units are supplied by a single feeder or service and the calculated load under Part III of this article exceeds that for three identical units calculated under 220.84, the lesser of the two loads shall be permitted to be used. [220.85](https://2023.antflix.net#220.85)", + "displayTitle": "220.85 Two Dwelling Units", + "children": [], + "url": "https://2023.antflix.net#220.85" + }, + { + "body": "The calculation of a feeder or service load for schools shall be permitted in accordance with Table 220.86 in lieu of Part III of this article where equipped with electric space heating, air conditioning, or both. The connected load to which the demand factors of Table 220.86 apply shall include all of the interior and exterior lighting, power, water heating, cooking, other loads, and the larger of the air-conditioning load or space-heating load within the building or structure. Feeders and service conductors whose calculated load is determined by this optional calculation shall be permitted to have the neutral load determined by 220.61. Where the building or structure load is calculated by this optional method, feeders within the building or structure shall have ampacity as permitted in Part III of this article; however, the ampacity of an individual feeder shall not be required to be larger than the ampacity for the entire building. This section shall not apply to portable classroom buildings. Table 220.86 Optional Method - Demand Factors for Feeders and Service Conductors for Schools Connected Load Demand Factor (%) Calculated Loads (VA) Total VA/m2 Total VA/ft2 0\u201433 0\u20143 100 Amount \u00d7 100% Over 33\u2014220 Over 3\u201420 75 (Amount \u00d7 75%) + 3 Remainder over 220 Remainder over 20 25 (Amount \u00d7 25%) + 15.75 [220.86](https://2023.antflix.net#220.86)", + "displayTitle": "220.86 Schools", + "children": [], + "url": "https://2023.antflix.net#220.86" + }, + { + "body": "The calculation of a feeder or service load for existing installations shall be permitted to use actual maximum demand to determine the existing load under all of the following conditions: The maximum demand data is available for a 1-year period.Exception: If the maximum demand data for a 1-year period is not available, the calculated load shall be permitted to be based on the maximum demand (the highest average kilowatts reached and maintained for a 15-minute interval) continuously recorded over a minimum 30-day period using a recording ammeter or power meter connected to the highest loaded phase of the feeder or service, based on the initial loading at the start of the recording. The recording shall reflect the maximum demand of the feeder or service by being taken when the building or space is occupied and shall include by measurement or calculation the larger of the heating or cooling equipment load, and other loads that might be periodic in nature due to seasonal or similar conditions. This exception shall not be permitted if the feeder or service has a renewable energy system (i.e., solar photovoltaic or wind electric) or employs any form of peak load shaving.The maximum demand at 125 percent plus the new load does not exceed the ampacity of the feeder or rating of the service.The feeder has overcurrent protection in accordance with 240.4, and the service has overload protection in accordance with 230.90. [220.87](https://2023.antflix.net#220.87)", + "displayTitle": "220.87 Determining Existing Loads", + "children": [], + "url": "https://2023.antflix.net#220.87" + }, + { + "body": "Calculation of a service or feeder load, where the feeder serves the total load, for a new restaurant shall be permitted in accordance with Table 220.88 in lieu of Part III of this article. The overload protection of the service conductors shall be in accordance with 230.90 and 240.4. Feeder conductors shall not be required to be of greater ampacity than the service conductors. Service or feeder conductors whose calculated load is determined by this optional calculation shall be permitted to have the neutral load determined by 220.61. Table 220.88 Optional Method - Permitted Load Calculations for Service and Feeder Conductors for New Restaurants Total Connected Load (kVA) All Electric Restaurant Not All Electric Restaurant Calculated Loads (kVA) Calculated Loads (kVA) 0\u2014200 80% 100% 201\u2014325 10% (amount over 200) + 160.0 50% (amount over 200) + 200.0 326\u2014800 50% (amount over 325) + 172.5 45% (amount over 325) + 262.5 Over 800 50% (amount over 800) + 410.0 20% (amount over 800) + 476.3 Note: Add all electrical loads, including both heating and cooling loads, to calculate the total connected load. Select the one demand factor that applies from the table, then multiply the total connected load by this single demand factor. [220.88](https://2023.antflix.net#220.88)", + "displayTitle": "220.88 New Restaurants", + "children": [], + "url": "https://2023.antflix.net#220.88" + }, + { + "displayTitle": "Part V Farm Load Calculations", + "children": [], + "url": "https://2023.antflix.net#divider_2_V" + }, + { + "body": "Farm loads shall be calculated in accordance with Part V. [220.100](https://2023.antflix.net#220.100)", + "displayTitle": "220.100 General", + "children": [], + "url": "https://2023.antflix.net#220.100" + }, + { + "displayTitle": "220.102 Farm Loads - Buildings and Other Loads", + "children": [ + { + "body": "The feeder or service load of a farm dwelling unit shall be calculated in accordance with the provisions for dwellings in Part III or IV of this article. Where the dwelling has electric heat and the farm has electric grain-drying systems, Part IV of this article shall not be used to calculate the dwelling load where the dwelling and farm loads are supplied by a common service. [220.102_(A)](https://2023.antflix.net#220.102_(A))", + "displayTitle": "(A) Dwelling Unit", + "children": [], + "url": "https://2023.antflix.net#220.102_(A)" + }, + { + "body": "Where a feeder or service supplies a farm building or other load having two or more separate branch circuits, the load for feeders, service conductors, and service equipment shall be calculated in accordance with demand factors not less than indicated in Table 220.102(B). Table 220.102(B) Method for Calculating Farm Loads for Other Than Dwelling Unit Ampere Load at 240 Volts Maximum Demand Factor (%) The greater of the following: All loads that are expected to operate simultaneously, or 100 125 percent of the full load current of the largest motor, or First 60 amperes of the load Next 60 amperes of all other loads 50 Remainder of other loads 25 [220.102_(B)](https://2023.antflix.net#220.102_(B))", + "displayTitle": "(B) Other Than Dwelling Unit", + "children": [], + "url": "https://2023.antflix.net#220.102_(B)" + } + ], + "url": "https://2023.antflix.net#220.102" + }, + { + "body": "Where supplied by a common service, the total load of the farm for service conductors and service equipment shall be calculated in accordance with the farm dwelling unit load and demand factors specified in Table 220.103. Where there is equipment in two or more farm equipment buildings or for loads having the same function, such loads shall be calculated in accordance with Table 220.102(B) and shall be permitted to be combined as a single load in Table 220.103 for calculating the total load. Table 220.103 Method for Calculating Total Farm Load Individual Loads Calculated in Accordance with Table 220.102 Demand Factor (%) Largest load 100 Second largest load 75 Third largest load 65 Remaining loads 50 Note: To this total load, add the load of the farm dwelling unit calculated in accordance with Part III or IV of this article. Where the dwelling has electric heat and the farm has electric grain-drying systems, Part IV of this article shall not be used to calculate the dwelling load. [220.103](https://2023.antflix.net#220.103)", + "displayTitle": "220.103 Farm Loads - Total", + "children": [], + "url": "https://2023.antflix.net#220.103" + }, + { + "displayTitle": "Part VI Health Care Facilities", + "children": [], + "url": "https://2023.antflix.net#divider_2_VI" + }, + { + "body": "Receptacle loads calculated in accordance with 220.14(H) and (I) and supplied by branch circuits not exceeding 150 volts to ground shall be permitted to be subjected to the demand factors provided in Table 220.110(1) and Table 220.110(2) for health care facilities. Informational Note No. 1: See Article 100 for the definitions of patient care space categories. Informational Note No. 2: See 220.14(I) for the calculation of receptacle outlet loads. Table 220.110(1) Demand Factors for Receptacles Supplied by General-Purpose Branch Circuits in Category 1 and Category 2 Patient Care Spaces Portion of Receptacle Load to Which Demand Factor Applies (Volt-Amperes) Demand Factor (%) First 5000 or less 100 From 5001 to 10,000 50 Remainder over 10,000 25 Table 220.110(2) Demand Factors for Receptacles Supplied by General-Purpose Branch Circuits in Category 3 and Category 4 Patient Care Spaces Portion of Receptacle Load to Which Demand Factor Applies (Volt-Amperes) Demand Factor (%) First 10,000 or less 100 Remainder over 10,000 50 [220.110](https://2023.antflix.net#220.110)", + "displayTitle": "220.110 Receptacle Loads", + "children": [], + "url": "https://2023.antflix.net#220.110" + }, + { + "displayTitle": "Part VII Marinas, Boatyards, Floating Buildings, and Commercial and Noncommercial Docking Facilities", + "children": [], + "url": "https://2023.antflix.net#divider_2_VII" + }, + { + "body": "General lighting and other loads in marinas, boatyards, floating buildings, and commercial and noncommercial docking facilities shall be calculated in accordance with Part III of this article and, in addition, the demand factors set forth in Table 220.120 shall be permitted for each service or feeder circuit supplying receptacles that provide shore power for boats. These calculations shall be permitted to be modified as indicated in Notes (1) and (2) of Table 220.120. Where demand factors of Table 220.120 are applied, the demand factor specified in 220.61 (B) shall not be permitted. Informational Note: These demand factors could be inadequate in areas of extreme hot or cold temperatures with loaded circuits for heating, air-conditioning, or refrigerating equipment. Table 220.120 Demand Factors for Shore Power Receptacle Loads Number of Shore Power Receptacles Sum of the Rating of the Receptacles (%) 1\u20144 100 5\u20148 90 9\u201414 80 15\u201430 70 31\u201440 60 41\u201450 50 51\u201470 40 \u226571 30 Notes:Where shore power accommodations provide two receptacles specifically for an individual boat slip and these receptacles have different voltages (e.g., one 30-ampere, 125-volt and one 50-ampere, 125/250-volt), only the receptacle with the larger kilowatt demand shall be required to be calculated.For each shore powered pedestal being installed that includes an individual kilowatt-hour submeters for each slip and is being calculated using the criteria listed in Table 220.120, the total demand amperes shall be permitted to be multiplied by 0.9 to achieve the final demand amperes of the facility.If a circuit feeding a boat hoist and shore power for the same boat slip is shared, only the load with the larger kilowatt demand shall be required to be counted in the load calculation. [220.120](https://2023.antflix.net#220.120)", + "displayTitle": "220.120 Receptacle Loads", + "children": [], + "url": "https://2023.antflix.net#220.120" + } + ], + "url": "https://2023.antflix.net#220" + }, + { + "displayTitle": "Article 225 Outside Branch Circuits and Feeders", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_3_I" + }, + { + "body": "This article covers requirements for outside branch circuits and feeders not over 1000 volts ac or 1500 volts dc, nominal, run on or between buildings, structures, or poles on the premises; and electrical equipment and wiring for the supply of utilization equipment that is located on or attached to the outside of buildings, structures, or poles. Informational Note: See Part IV of Article 235 for outside branch circuits and feeders over 1000 volts ac or 1500 volts dc. [225.1](https://2023.antflix.net#225.1)", + "displayTitle": "225.1 Scope", + "children": [], + "url": "https://2023.antflix.net#225.1" + }, + { + "body": "Application of other articles, including additional requirements to specific cases of equipment and conductors, is shown in Table 225.3.\nTable 225.3 Other Articles\n\n\n\nEquipment/Conductors\nArticle\n\n\n\n\nBranch circuits\n210\n\n\nClass 1 power-limited circuits and Class 1 power-limited remote-control and signaling circuits\n724\n\n\nClass 2 and Class 3 remote-control, signaling, and power-limited circuits\n725\n\n\nConductors for general wiring\n310\n\n\nElectrically driven or controlled irrigation machines\n675\n\n\nElectric signs and outline lighting\n600\n\n\nFeeders\n215\n\n\nFire alarm systems\n760\n\n\nFixed outdoor electric deicing and snow-melting equipment\n426\n\n\nGrounding and bonding\n250\n\n\nHazardous (classified) locations\n500\n\n\nMarinas and boatyards\n555\n\n\nMedium-voltage conductors and cable\n311\n\n\nMessenger-supported wiring\n396\n\n\nMobile homes, manufactured homes, and mobile home parks\n550\n\n\nOpen wiring on insulators\n398\n\n\nOver 1000 volts, general\n495\n\n\nOvercurrent protection\n240\n\n\nOvercurrent protection for systems rated over 1000 volts ac, 1500 volts dc\n245\n\n\nServices\n230\n\n\nServices, feeders, and branch circuits over 1000 volts ac, 1500 volts dc\n235\n\n\nSolar photovoltaic systems\n690\n\n\nSwimming pools, fountains, and similar installations\n680\n\n\nUse and identification of grounded conductors\n200\n\n\n [225.3](https://2023.antflix.net#225.3)", + "displayTitle": "225.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#225.3" + }, + { + "body": "Where within 3.0 m (10 ft) of any building or structure other than supporting poles or towers, open individual (aerial) overhead conductors shall be insulated for the nominal voltage. The insulation of conductors in cables or raceways, except Type MI cable, shall be of thermoset or thermoplastic type and, in wet locations, shall comply with 310.10(C). The insulation of conductors for festoon lighting shall be of the thermoset or thermoplastic type. Exception: Equipment grounding conductors and grounded circuit conductors shall be permitted to be bare or covered as specifically permitted elsewhere in this Code. [225.4](https://2023.antflix.net#225.4)", + "displayTitle": "225.4 Conductor Insulation", + "children": [], + "url": "https://2023.antflix.net#225.4" + }, + { + "displayTitle": "225.6 Conductor Size and Support", + "children": [ + { + "body": "Open individual conductors shall not be smaller than 10 AWG copper or 8 AWG aluminum for spans up to 15 m (50 ft) in length, and 8 AWG copper or 6 AWG aluminum for a longer span unless supported by a messenger wire. [225.6_(A)](https://2023.antflix.net#225.6_(A))", + "displayTitle": "(A) Overhead Spans", + "children": [], + "url": "https://2023.antflix.net#225.6_(A)" + }, + { + "body": "Overhead conductors for festoon lighting shall not be smaller than 12 AWG unless the conductors are supported by messenger wires. In all spans exceeding 12 m (40 ft), the conductors shall be supported by messenger wire. The messenger wire shall be supported by strain insulators. Conductors or messenger wires shall not be attached to any fire escape, downspout, or plumbing equipment. [225.6_(B)](https://2023.antflix.net#225.6_(B))", + "displayTitle": "(B) Festoon Lighting", + "children": [], + "url": "https://2023.antflix.net#225.6_(B)" + } + ], + "url": "https://2023.antflix.net#225.6" + }, + { + "body": "The installation of outside wiring on surfaces of buildings (or other structures) shall be permitted for circuits not exceeding 1000 volts, nominal, as the following: Auxiliary guttersBuswaysCable traysCablebusElectrical metallic tubing (EMT)Flexible metal conduit (FMC)Intermediate metal conduit (IMC)Liquidtight flexible metal conduit (LFMC)Liquidtight flexible nonmetallic conduit (LFNC)Messenger-supported wiringOpen wiring on insulatorsReinforced thermosetting resin conduit (RTRC)Rigid metal conduit (RMC)Rigid polyvinyl chloride conduit (PVC)Type MC cableType MI cableType SE cableType TC-ER cableType UF cableWireways [225.10](https://2023.antflix.net#225.10)", + "displayTitle": "225.10 Wiring on Buildings (or Other Structures)", + "children": [], + "url": "https://2023.antflix.net#225.10" + }, + { + "body": "Feeder and branch-circuit conductors entering or exiting buildings or structures shall be installed in accordance with 230.52. Overhead branch circuits and feeders attached to buildings or structures shall be installed in accordance with 230.54. [225.11](https://2023.antflix.net#225.11)", + "displayTitle": "225.11 Feeder and Branch-Circuit Conductors Entering, Exiting, or Attached to Buildings or Structures", + "children": [], + "url": "https://2023.antflix.net#225.11" + }, + { + "body": "Open conductors shall be supported on knobs, racks, brackets, or strain insulators, that are made of glass, porcelain, or other approved materials. [225.12](https://2023.antflix.net#225.12)", + "displayTitle": "225.12 Open-Conductor Supports", + "children": [], + "url": "https://2023.antflix.net#225.12" + }, + { + "body": "Conductors shall comply with the spacings provided in Table 230.51 (C). [225.14](https://2023.antflix.net#225.14)", + "displayTitle": "225.14 Open-Conductor Spacings", + "children": [ + { + "body": "Open conductors shall be separated from open conductors of other circuits or systems by not less than 100 mm (4 in.). [225.14_(A)](https://2023.antflix.net#225.14_(A))", + "displayTitle": "(A) Separation From Other Circuits", + "children": [], + "url": "https://2023.antflix.net#225.14_(A)" + }, + { + "body": "Conductors on poles shall have a separation of not less than 300 mm (1 ft) where not placed on racks or brackets. Conductors supported on poles shall provide a horizontal climbing space not less than the following: Power conductors below communications conductors - 750 mm (30 in.)Power conductors alone or above communications conductors:300 volts or less - 600 mm (24 in.)Over 300 volts - 750 mm (30 in.)Communications conductors below power conductors - same as power conductorsCommunications conductors alone - no requirement [225.14_(B)](https://2023.antflix.net#225.14_(B))", + "displayTitle": "(B) Conductors on Poles", + "children": [], + "url": "https://2023.antflix.net#225.14_(B)" + } + ], + "url": "https://2023.antflix.net#225.14" + }, + { + "body": "Outside branch-circuit and feeder conductors passing over a building shall be securely supported. [225.15](https://2023.antflix.net#225.15)", + "displayTitle": "225.15 Supports Over Buildings", + "children": [], + "url": "https://2023.antflix.net#225.15" + }, + { + "displayTitle": "225.16 Attachment to Buildings", + "children": [ + { + "body": "The point of attachment to a building shall be in accordance with 230.26. [225.16_(A)](https://2023.antflix.net#225.16_(A))", + "displayTitle": "(A) Point of Attachment", + "children": [], + "url": "https://2023.antflix.net#225.16_(A)" + }, + { + "body": "The means of attachment to a building shall be in accordance with 230.27. [225.16_(B)](https://2023.antflix.net#225.16_(B))", + "displayTitle": "(B) Means of Attachment", + "children": [], + "url": "https://2023.antflix.net#225.16_(B)" + } + ], + "url": "https://2023.antflix.net#225.16" + }, + { + "body": "Only feeder or branch-circuit conductors specified within this section shall be permitted to be attached to the feeder and/or branch-circuit mast. Masts used for the support of final spans of feeders or branch circuits shall be installed in accordance with 225.17(A) and (B). [225.17](https://2023.antflix.net#225.17)", + "displayTitle": "225.17 Masts as Supports", + "children": [ + { + "body": "The mast shall have adequate strength or be supported by braces or guy wires to safely withstand the strain imposed by the overhead feeder or branch-circuit conductors. Hubs intended for use with a conduit serving as a mast for support of feeder or branch-circuit conductors shall be identified for use with a mast. [225.17_(A)](https://2023.antflix.net#225.17_(A))", + "displayTitle": "(A) Strength", + "children": [], + "url": "https://2023.antflix.net#225.17_(A)" + }, + { + "body": "Feeder and/or branch-circuit conductors shall not be attached to a mast where the connection is between a weatherhead or the end of the conduit and a coupling where the coupling is located above the last point of securement to the building or other structure, or where the coupling is located above the building or other structure. [225.17_(B)](https://2023.antflix.net#225.17_(B))", + "displayTitle": "(B) Attachment", + "children": [], + "url": "https://2023.antflix.net#225.17_(B)" + } + ], + "url": "https://2023.antflix.net#225.17" + }, + { + "body": "Overhead spans of open conductors and open multiconductor cables of not over 1000 volts, nominal, shall have a clearance of not less than the following: 3.0 m (10 ft) - above finished grade, sidewalks, or from any platform or projection that will permit personal contact where the voltage does not exceed 150 volts to ground and accessible to pedestrians only3.7 m (12 ft) - over residential property and driveways, and those commercial areas not subject to truck traffic where the voltage does not exceed 300 volts to ground4.5 m (15 ft) - for those areas listed in the 3.7 m (12 ft) classification where the voltage exceeds 300 volts to ground5.5 m (18 ft) - over public streets, alleys, roads, parking areas subject to truck traffic, driveways on other than residential property, and other land traversed by vehicles, such as cultivated, grazing, forest, and orchard7.5 m (241/2 ft) - over track rails of railroads [225.18](https://2023.antflix.net#225.18)", + "displayTitle": "225.18 Clearance for Overhead Conductors and Cables", + "children": [], + "url": "https://2023.antflix.net#225.18" + }, + { + "body": "Overhead spans of open conductors and open multiconductor cables shall comply with 225.19(A), (B), (C), and (D). [225.19](https://2023.antflix.net#225.19)", + "displayTitle": "225.19 Clearances From Buildings for Conductors of Not Over 1000 Volts, Nominal", + "children": [ + { + "body": "Overhead spans of open conductors and open multiconductor cables shall have a vertical clearance of not less than 2.6 m (8 ft 6 in.) above the roof surface. The vertical clearance above the roof level shall be maintained for a distance not less than 900 mm (3 ft) in all directions from the edge of the roof. Exception No. 1: The area above a roof surface subject to pedestrian or vehicular traffic shall have a vertical clearance from the roof surface in accordance with the clearance requirements of 225.18. Exception No. 2: Where the voltage between conductors does not exceed 300, and the roof has a slope of 100 mm in 300 mm (4 in. in 12 in.) or greater, a reduction in clearance to 900 mm (3 ft) shall be permitted. Exception No. 3: Where the voltage between conductors does not exceed 300, a reduction in clearance above only the overhanging portion of the roof to not less than 450 mm (18 in.) shall be permitted if (1) not more than 1.8 m (6 ft) of the conductors, 1.2 m (4 ft) horizontally, pass above the roof overhang, and (2) they are terminated at a through-the-roof raceway or approved support. Exception No. 4: The requirement for maintaining the vertical clearance 900 mm (3 ft) from the edge of the roof shall not apply to the final conductor span where the conductors are attached to the side of a building. [225.19_(A)](https://2023.antflix.net#225.19_(A))", + "displayTitle": "(A) Above Roofs", + "children": [], + "url": "https://2023.antflix.net#225.19_(A)" + }, + { + "body": "From signs, chimneys, radio and television antennas, tanks, and other nonbuilding or nonbridge structures, clearances - vertical, diagonal, and horizontal - shall not be less than 900 mm (3 ft). [225.19_(B)](https://2023.antflix.net#225.19_(B))", + "displayTitle": "(B) From Nonbuilding or Nonbridge Structures", + "children": [], + "url": "https://2023.antflix.net#225.19_(B)" + }, + { + "body": "Clearances shall not be less than 900 mm (3 ft). [225.19_(C)](https://2023.antflix.net#225.19_(C))", + "displayTitle": "(C) Horizontal Clearances", + "children": [], + "url": "https://2023.antflix.net#225.19_(C)" + }, + { + "body": "Final spans of feeders or branch circuits shall comply with 225.19(D)(1), (D)(2), and (D)(3). [225.19_(D)](https://2023.antflix.net#225.19_(D))", + "displayTitle": "(D) Final Spans", + "children": [ + { + "body": "Final spans to the building they supply, or from which they are fed, shall be permitted to be attached to the building, but they shall be kept not less than 900 mm (3 ft) from windows that are designed to be opened, and from doors, porches, balconies, ladders, stairs, fire escapes, or similar locations. Exception: Conductors run above the top level of a window shall be permitted to be less than the 900 mm (3 ft) requirement. [225.19_(D)_(1)](https://2023.antflix.net#225.19_(D)_(1))", + "displayTitle": "(1) Clearance From Windows", + "children": [], + "url": "https://2023.antflix.net#225.19_(D)_(1)" + }, + { + "body": "The vertical clearance of final spans above or within 900 mm (3 ft) measured horizontally of platforms, projections, or surfaces that will permit personal contact shall be maintained in accordance with 225.18. [225.19_(D)_(2)](https://2023.antflix.net#225.19_(D)_(2))", + "displayTitle": "(2) Vertical Clearance", + "children": [], + "url": "https://2023.antflix.net#225.19_(D)_(2)" + }, + { + "body": "The overhead branch-circuit and feeder conductors shall not be installed beneath openings through which materials may be moved, such as openings in farm and commercial buildings, and shall not be installed where they obstruct entrance to these openings. [225.19_(D)_(3)](https://2023.antflix.net#225.19_(D)_(3))", + "displayTitle": "(3) Building Openings", + "children": [], + "url": "https://2023.antflix.net#225.19_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#225.19_(D)" + }, + { + "body": "Where buildings exceed three stories or 15 m (50 ft) in height, overhead lines shall be arranged, where practicable, so that a clear space (or zone) at least 1.8 m (6 ft) wide will be left either adjacent to the buildings or beginning not over 2.5 m (8 ft) from them to facilitate the raising of ladders when necessary for fire fighting. [225.19_(E)](https://2023.antflix.net#225.19_(E))", + "displayTitle": "(E) Zone for Fire Ladders", + "children": [], + "url": "https://2023.antflix.net#225.19_(E)" + } + ], + "url": "https://2023.antflix.net#225.19" + }, + { + "body": "Conductors installed on buildings, structures, or poles shall be protected against physical damage as provided for services in 230.50. [225.20](https://2023.antflix.net#225.20)", + "displayTitle": "225.20 Protection Against Physical Damage", + "children": [], + "url": "https://2023.antflix.net#225.20" + }, + { + "body": "Supports for multiconductor cables on exterior surfaces of buildings (or other structures) shall be as provided in 230.51. [225.21](https://2023.antflix.net#225.21)", + "displayTitle": "225.21 Multiconductor Cables on Exterior Surfaces of Buildings (or Other Structures)", + "children": [], + "url": "https://2023.antflix.net#225.21" + }, + { + "body": "Raceways on exteriors of buildings or other structures shall be arranged to drain and shall be listed or approved for use in wet locations. [225.22](https://2023.antflix.net#225.22)", + "displayTitle": "225.22 Raceways on Exterior Surfaces of Buildings or Other Structures", + "children": [], + "url": "https://2023.antflix.net#225.22" + }, + { + "body": "Where outdoor lampholders are attached as pendants, the connections to the circuit wires shall be staggered. Where such lampholders have terminals of a type that puncture the insulation and make contact with the conductors, they shall be attached only to conductors of the stranded type. [225.24](https://2023.antflix.net#225.24)", + "displayTitle": "225.24 Outdoor Lampholders", + "children": [], + "url": "https://2023.antflix.net#225.24" + }, + { + "body": "Locations of lamps for outdoor lighting shall be below all energized conductors, transformers, or other electric utilization equipment, unless either of the following apply: Clearances or other safeguards are provided for relamping operations.Equipment is controlled by a disconnecting means that is lockable open in accordance with 110.25. [225.25](https://2023.antflix.net#225.25)", + "displayTitle": "225.25 Location of Outdoor Lamps", + "children": [], + "url": "https://2023.antflix.net#225.25" + }, + { + "body": "Vegetation such as trees shall not be used for support of overhead conductor spans. [225.26](https://2023.antflix.net#225.26)", + "displayTitle": "225.26 Vegetation as Support", + "children": [], + "url": "https://2023.antflix.net#225.26" + }, + { + "body": "Where a raceway enters a building or structure from outside, it shall be sealed in accordance with 300.5(G) and 300.7(A). Spare or unused raceways shall also be sealed. Sealants shall be identified for use with cable insulation, conductor insulation, bare conductor, shield, or other components. [225.27](https://2023.antflix.net#225.27)", + "displayTitle": "225.27 Raceway Seal", + "children": [], + "url": "https://2023.antflix.net#225.27" + }, + { + "displayTitle": "Part II Buildings or Other Structures Supplied by a Feeder(s) or Branch Circuit(s)", + "children": [], + "url": "https://2023.antflix.net#divider_3_II" + }, + { + "body": "A building or other structure that is served by a branch circuit or feeder on the load side of a service disconnecting means shall be supplied by only one feeder or branch circuit unless permitted in 225.30(A) through (F). For the purpose of this section, a multiwire branch circuit shall be considered a single circuit. Where a branch circuit or feeder originates in these additional buildings or other structures, only one feeder or branch circuit shall be permitted to supply power back to the original building or structure, unless permitted in 225.30(A) through (F). [225.30](https://2023.antflix.net#225.30)", + "displayTitle": "225.30 Number of Supplies", + "children": [ + { + "body": "Additional feeders or branch circuits shall be permitted to supply the following: Fire pumpsEmergency systemsLegally required standby systemsOptional standby systemsParallel power production systemsSystems designed for connection to multiple sources of supply for the purpose of enhanced reliabilityElectric vehicle power transfer systems listed, labeled, and identified for more than a single branch circuit or feederDocking facilities and piers [225.30_(A)](https://2023.antflix.net#225.30_(A))", + "displayTitle": "(A) Special Conditions", + "children": [], + "url": "https://2023.antflix.net#225.30_(A)" + }, + { + "body": "Where feeder conductors originate in the same panelboard, switchboard, or other distribution equipment, and each feeder terminates in a single disconnecting means, not more than six feeders shall be permitted. Where more than one feeder is installed in accordance with this section, all feeder disconnects supplying the building or structure shall be grouped in the same location, and the requirements of 225.33 shall not apply. Each disconnect shall be marked to indicate the load served. [225.30_(B)](https://2023.antflix.net#225.30_(B))", + "displayTitle": "(B) Common Supply Equipment", + "children": [], + "url": "https://2023.antflix.net#225.30_(B)" + }, + { + "body": "By special permission, additional feeders or branch circuits shall be permitted for either of the following: Multiple-occupancy buildings where there is no space available for supply equipment accessible to all occupantsA single building or other structure sufficiently large to make two or more supplies necessary [225.30_(C)](https://2023.antflix.net#225.30_(C))", + "displayTitle": "(C) Special Occupancies", + "children": [], + "url": "https://2023.antflix.net#225.30_(C)" + }, + { + "body": "Additional feeders or branch circuits shall be permitted where the capacity requirements are in excess of 2000 amperes at a supply voltage of 1000 volts or less. [225.30_(D)](https://2023.antflix.net#225.30_(D))", + "displayTitle": "(D) Capacity Requirements", + "children": [], + "url": "https://2023.antflix.net#225.30_(D)" + }, + { + "body": "Additional feeders or branch circuits shall be permitted for different voltages, frequencies, or phases, or for different uses such as control of outside lighting from multiple locations. [225.30_(E)](https://2023.antflix.net#225.30_(E))", + "displayTitle": "(E) Different Characteristics", + "children": [], + "url": "https://2023.antflix.net#225.30_(E)" + }, + { + "body": "Additional feeders or branch circuits shall be permitted to supply installations under single management where documented safe switching procedures are established and maintained. [225.30_(F)](https://2023.antflix.net#225.30_(F))", + "displayTitle": "(F) Documented Switching Procedures", + "children": [], + "url": "https://2023.antflix.net#225.30_(F)" + } + ], + "url": "https://2023.antflix.net#225.30" + }, + { + "displayTitle": "225.31 Disconnecting Means", + "children": [ + { + "body": "Means shall be provided for disconnecting all ungrounded conductors that supply or pass through the building or structure. [225.31_(A)](https://2023.antflix.net#225.31_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#225.31_(A)" + }, + { + "body": "The disconnecting means shall be installed either inside or outside of the building or structure served or where the conductors pass through the building or structure. The disconnecting means shall be at a readily accessible location nearest the point of entrance of the conductors. For the purposes of this section, the requirements in 230.6 shall apply. Exception No. 1: For installations under single management, where documented safe switching procedures are established and maintained, and where the installation is monitored by qualified individuals, the disconnecting means shall be permitted to be located elsewhere on the premises. Exception No. 2: For buildings or other structures qualifying under 685.1, the disconnecting means shall be permitted to be located elsewhere on the premises. Exception No. 3: For towers or poles used as lighting standards, the disconnecting means shall be permitted to be located elsewhere on the premises. Exception No. 4: For poles or similar structures used only for support of signs installed in accordance with 600.1, the disconnecting means shall be permitted to be located elsewhere on the premises. [225.31_(B)](https://2023.antflix.net#225.31_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#225.31_(B)" + } + ], + "url": "https://2023.antflix.net#225.31" + }, + { + "displayTitle": "225.33 Maximum Number of Disconnects", + "children": [ + { + "body": "The disconnecting means for each supply permitted by 225.30 shall consist of not more than six switches or six circuit breakers mounted in a single enclosure, in a group of separate enclosures, or in or on a switchboard or switchgear. There shall be no more than six disconnects per supply grouped in any one location. Exception: For the purposes of this section, disconnecting means used solely for the control circuit of the ground-fault protection system, or the control circuit of the power-operated supply disconnecting means, installed as part of the listed equipment, shall not be considered a supply disconnecting means. [225.33_(A)](https://2023.antflix.net#225.33_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#225.33_(A)" + }, + { + "body": "Two or three single-pole switches or breakers capable of individual operation shall be permitted on multiwire circuits, one pole for each ungrounded conductor, as one multipole disconnect, provided they are equipped with identified handle ties or a master handle to disconnect all ungrounded conductors with no more than six operations of the hand. [225.33_(B)](https://2023.antflix.net#225.33_(B))", + "displayTitle": "(B) Single-Pole Units", + "children": [], + "url": "https://2023.antflix.net#225.33_(B)" + } + ], + "url": "https://2023.antflix.net#225.33" + }, + { + "displayTitle": "225.34 Grouping of Disconnects", + "children": [ + { + "body": "The two to six disconnects as permitted in 225.33 shall be grouped. Each disconnect shall be marked to indicate the load served. Exception: One of the two to six disconnecting means permitted in 225.33, where used only for a water pump also intended to provide fire protection, shall be permitted to be located remote from the other disconnecting means. [225.34_(A)](https://2023.antflix.net#225.34_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#225.34_(A)" + }, + { + "body": "The one or more additional disconnecting means for fire pumps or for emergency, legally required standby or optional standby system permitted by 225.30 shall be installed sufficiently remote from the one to six disconnecting means for normal supply to minimize the possibility of simultaneous interruption of supply. [225.34_(B)](https://2023.antflix.net#225.34_(B))", + "displayTitle": "(B) Additional Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#225.34_(B)" + } + ], + "url": "https://2023.antflix.net#225.34" + }, + { + "body": "In a multiple-occupancy building, each occupant shall have access to the occupant's supply disconnecting means. Exception: In a multiple-occupancy building where electric supply and electrical maintenance are provided by the building management and where these are under continuous building management supervision, the supply disconnecting means supplying more than one occupancy shall be permitted to be accessible to authorized management personnel only. [225.35](https://2023.antflix.net#225.35)", + "displayTitle": "225.35 Access to Occupants", + "children": [], + "url": "https://2023.antflix.net#225.35" + }, + { + "body": "The disconnecting means specified in 225.31 shall be a circuit breaker, molded case switch, general-use switch, snap switch, or other approved means. Where applied in accordance with 250.32(B)(1), Exception No. 1, the disconnecting means shall be suitable for use as service equipment. [225.36](https://2023.antflix.net#225.36)", + "displayTitle": "225.36 Type of Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#225.36" + }, + { + "body": "Where a building or structure has any combination of feeders, branch circuits, or services passing through it or supplying it, a permanent plaque or directory shall be installed at each feeder and branch-circuit disconnect location denoting all other services, feeders, or branch circuits supplying that building or structure or passing through that building or structure and the area served by each. Exception No. 1: A plaque or directory shall not be required for large-capacity multibuilding industrial installations under single management, where it is ensured that disconnection can be accomplished by establishing and maintaining safe switching procedures. Exception No. 2: This identification shall not be required for branch circuits installed from a dwelling unit to a second building or structure. [225.37](https://2023.antflix.net#225.37)", + "displayTitle": "225.37 Identification", + "children": [], + "url": "https://2023.antflix.net#225.37" + }, + { + "body": "Disconnecting means shall meet the requirements of 225.38(A) through (D). [225.38](https://2023.antflix.net#225.38)", + "displayTitle": "225.38 Disconnect Construction", + "children": [ + { + "body": "The disconnecting means shall consist of either (1) a manually operable switch or a circuit breaker equipped with a handle or other suitable operating means or (2) a power-operable switch or circuit breaker, provided the switch or circuit breaker can be opened by hand in the event of a power failure. [225.38_(A)](https://2023.antflix.net#225.38_(A))", + "displayTitle": "(A) Manually or Power Operable", + "children": [], + "url": "https://2023.antflix.net#225.38_(A)" + }, + { + "body": "Each building or structure disconnecting means shall simultaneously disconnect all ungrounded supply conductors that it controls from the building or structure wiring system. [225.38_(B)](https://2023.antflix.net#225.38_(B))", + "displayTitle": "(B) Simultaneous Opening of Poles", + "children": [], + "url": "https://2023.antflix.net#225.38_(B)" + }, + { + "body": "Where the building or structure disconnecting means does not disconnect the grounded conductor from the grounded conductors in the building or structure wiring, other means shall be provided for this purpose at the location of the disconnecting means. A terminal or bus to which all grounded conductors can be attached by means of pressure connectors shall be permitted for this purpose. In a multisection switchboard or switchgear, disconnects for the grounded conductor shall be permitted to be in any section of the switchboard or switchgear, if the switchboard section or switchgear section is marked to indicate a grounded conductor disconnect is contained within the equipment. [225.38_(C)](https://2023.antflix.net#225.38_(C))", + "displayTitle": "(C) Disconnection of Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#225.38_(C)" + }, + { + "body": "The building or structure disconnecting means shall plainly indicate whether it is in the open or closed position. [225.38_(D)](https://2023.antflix.net#225.38_(D))", + "displayTitle": "(D) Indicating", + "children": [], + "url": "https://2023.antflix.net#225.38_(D)" + } + ], + "url": "https://2023.antflix.net#225.38" + }, + { + "body": "The feeder or branch-circuit disconnecting means shall have a rating of not less than the calculated load to be supplied, determined in accordance with Parts I and II of Article 220 for branch circuits, Part III or IV of Article 220 for feeders, or Part V of Article 220 for farm loads. Where the branch circuit or feeder disconnecting means consists of more than one switch or circuit breaker, as permitted by 225.33, combining the ratings of all the switches or circuit breakers for determining the rating of the disconnecting means shall be permitted. In no case shall the rating be lower than specified in 225.39(A), (B), (C), or (D). [225.39](https://2023.antflix.net#225.39)", + "displayTitle": "225.39 Rating of Disconnect", + "children": [ + { + "body": "For installations to supply only limited loads of a single branch circuit, the branch circuit disconnecting means shall have a rating of not less than 15 amperes. [225.39_(A)](https://2023.antflix.net#225.39_(A))", + "displayTitle": "(A) One-Circuit Installation", + "children": [], + "url": "https://2023.antflix.net#225.39_(A)" + }, + { + "body": "For installations consisting of not more than two 2-wire branch circuits, the feeder or branch-circuit disconnecting means shall have a rating of not less than 30 amperes. [225.39_(B)](https://2023.antflix.net#225.39_(B))", + "displayTitle": "(B) Two-Circuit Installations", + "children": [], + "url": "https://2023.antflix.net#225.39_(B)" + }, + { + "body": "For a one-family dwelling, the feeder disconnecting means shall have a rating of not less than 100 amperes, 3-wire. [225.39_(C)](https://2023.antflix.net#225.39_(C))", + "displayTitle": "(C) One-Family Dwelling", + "children": [], + "url": "https://2023.antflix.net#225.39_(C)" + }, + { + "body": "For all other installations, the feeder or branch-circuit disconnecting means shall have a rating of not less than 60 amperes. [225.39_(D)](https://2023.antflix.net#225.39_(D))", + "displayTitle": "(D) All Others", + "children": [], + "url": "https://2023.antflix.net#225.39_(D)" + } + ], + "url": "https://2023.antflix.net#225.39" + }, + { + "body": "Where a feeder overcurrent device is not readily accessible, branch-circuit overcurrent devices shall be installed on the load side, shall be mounted in a readily accessible location, and shall be of a lower ampere rating than the feeder overcurrent device. [225.40](https://2023.antflix.net#225.40)", + "displayTitle": "225.40 Access to Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#225.40" + }, + { + "body": "For one-and two-family dwelling units, an emergency disconnecting means shall be installed. [225.41](https://2023.antflix.net#225.41)", + "displayTitle": "225.41 Emergency Disconnects", + "children": [ + { + "displayTitle": "(A) General", + "children": [ + { + "body": "The disconnecting means shall be installed in a readily accessible outdoor location on or within sight of the dwelling unit. [225.41_(A)_(1)](https://2023.antflix.net#225.41_(A)_(1))", + "displayTitle": "(1) Location", + "children": [], + "url": "https://2023.antflix.net#225.41_(A)_(1)" + }, + { + "body": "The disconnecting means shall have a short-circuit current rating equal to or greater than the available fault current. [225.41_(A)_(2)](https://2023.antflix.net#225.41_(A)_(2))", + "displayTitle": "(2) Rating", + "children": [], + "url": "https://2023.antflix.net#225.41_(A)_(2)" + }, + { + "body": "If more than one disconnecting means is provided, they shall be grouped. [225.41_(A)_(3)](https://2023.antflix.net#225.41_(A)_(3))", + "displayTitle": "(3) Grouping", + "children": [], + "url": "https://2023.antflix.net#225.41_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#225.41_(A)" + }, + { + "body": "Where equipment for isolation of other energy source systems is not located adjacent to the emergency disconnect required by this section, a plaque or directory identifying the location of all equipment for isolation of other energy sources shall be located adjacent to the disconnecting means required by this section. Informational Note: See 445.18, 480.7, 705.20, and 706.15 for examples of other energy source system isolation means. [225.41_(B)](https://2023.antflix.net#225.41_(B))", + "displayTitle": "(B) Identification of Other Isolation Disconnects", + "children": [], + "url": "https://2023.antflix.net#225.41_(B)" + }, + { + "body": "The disconnecting means shall be marked as EMERGENCY DISCONNECT. Markings shall comply with 110.21(B) and all of the following:The marking or labels shall be located on the outside front of the disconnect enclosure with red background and white text.The letters shall be least 13 mm (1/2 in.) high. [225.41_(C)](https://2023.antflix.net#225.41_(C))", + "displayTitle": "(C) Marking", + "children": [], + "url": "https://2023.antflix.net#225.41_(C)" + } + ], + "url": "https://2023.antflix.net#225.41" + }, + { + "displayTitle": "225.42 Surge Protection", + "children": [ + { + "body": "Where a feeder supplies any of the following, a surge-protective device (SPD) shall be installed: Dwelling unitsDormitory unitsGuest rooms and guest suites of hotels and motelsAreas of nursing homes and limited-care facilities used exclusively as patient sleeping rooms [225.42_(A)](https://2023.antflix.net#225.42_(A))", + "displayTitle": "(A) Surge-Protective Device", + "children": [], + "url": "https://2023.antflix.net#225.42_(A)" + }, + { + "body": "The SPD shall be installed in or adjacent to the distribution equipment that is connected to the load side of the feeder and contains branch circuit overcurrent protective device(s) that supply the location specified in 225.42(A). Informational Note: Surge protection is most effective when closest to the branch circuit. Surges can be generated from multiple sources including, but not limited to, lightning, the electric utility, or utilization equipment. [225.42_(B)](https://2023.antflix.net#225.42_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#225.42_(B)" + }, + { + "body": "The SPD shall be a Type 1 or Type 2 SPD. [225.42_(C)](https://2023.antflix.net#225.42_(C))", + "displayTitle": "(C) Type", + "children": [], + "url": "https://2023.antflix.net#225.42_(C)" + }, + { + "body": "Where the distribution equipment supplied by the feeder is replaced, all of the requirements of this section shall apply. [225.42_(D)](https://2023.antflix.net#225.42_(D))", + "displayTitle": "(D) Replacement", + "children": [], + "url": "https://2023.antflix.net#225.42_(D)" + }, + { + "body": "SPDs shall have a nominal discharge current rating (In) of not less than 10kA. Informational Note: Lead lengths of conductors to the SPD should be kept as short as possible to reduce let-through voltages. [225.42_(E)](https://2023.antflix.net#225.42_(E))", + "displayTitle": "(E) Ratings", + "children": [], + "url": "https://2023.antflix.net#225.42_(E)" + } + ], + "url": "https://2023.antflix.net#225.42" + } + ], + "url": "https://2023.antflix.net#225" + }, + { + "displayTitle": "Article 230 Services", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_4_I" + }, + { + "body": "This article covers service conductors and equipment for control and protection of services not over 1000 volts ac or 1500 volts dc, nominal and their installation requirements. Informational Note No. 1: See Informational Note Figure 230.1. Informational Note No. 2: See Part V of Article 235 for services over 1000 volts ac or 1500 volts dc, nominal. Informational Note Figure 230.1 Services. [230.1](https://2023.antflix.net#230.1)", + "displayTitle": "230.1 Scope", + "children": [], + "url": "https://2023.antflix.net#230.1" + }, + { + "body": "A building or other structure served shall be supplied by only one service unless permitted in 230.2(A) through (D). For the purpose of 230.40, Exception No. 2 only, underground sets of conductors, 1/0 AWG and larger, running to the same location and connected together at their supply end but not connected together at their load end shall be considered to be supplying one service. [230.2](https://2023.antflix.net#230.2)", + "displayTitle": "230.2 Number of Services", + "children": [ + { + "body": "Additional services shall be permitted to supply the following: Fire pumpsEmergency systemsLegally required standby systemsOptional standby systemsInterconnected electric power production sourcesSystems designed for connection to multiple sources of supply for the purpose of enhanced reliability [230.2_(A)](https://2023.antflix.net#230.2_(A))", + "displayTitle": "(A) Special Conditions", + "children": [], + "url": "https://2023.antflix.net#230.2_(A)" + }, + { + "body": "By special permission, additional services shall be permitted for either of the following: Multiple-occupancy buildings where there is no available space for service equipment accessible to all occupantsA single building or other structure sufficiently large to make two or more services necessary [230.2_(B)](https://2023.antflix.net#230.2_(B))", + "displayTitle": "(B) Special Occupancies", + "children": [], + "url": "https://2023.antflix.net#230.2_(B)" + }, + { + "body": "Additional services shall be permitted under any of the following: Where the capacity requirements are in excess of 2000 amperes at a supply voltage of 1000 volts or lessWhere the load requirements of a single-phase installation are greater than the serving agency normally supplies through one serviceBy special permission [230.2_(C)](https://2023.antflix.net#230.2_(C))", + "displayTitle": "(C) Capacity Requirements", + "children": [], + "url": "https://2023.antflix.net#230.2_(C)" + }, + { + "body": "Additional services shall be permitted for different voltages, frequencies, or phases, or for different uses, such as for different rate schedules. [230.2_(D)](https://2023.antflix.net#230.2_(D))", + "displayTitle": "(D) Different Characteristics", + "children": [], + "url": "https://2023.antflix.net#230.2_(D)" + }, + { + "body": "Where a building or structure is supplied by more than one service, or any combination of branch circuits, feeders, and services, a permanent plaque or directory shall be installed at each service disconnect location denoting all other services, feeders, and branch circuits supplying that building or structure and the area served by each. See 225.37. [230.2_(E)](https://2023.antflix.net#230.2_(E))", + "displayTitle": "(E) Identification", + "children": [], + "url": "https://2023.antflix.net#230.2_(E)" + } + ], + "url": "https://2023.antflix.net#230.2" + }, + { + "body": "Service conductors supplying a building or other structure shall not pass through the interior of another building or other structure. [230.3](https://2023.antflix.net#230.3)", + "displayTitle": "230.3 One Building or Other Structure Not to Be Supplied Through Another", + "children": [], + "url": "https://2023.antflix.net#230.3" + }, + { + "body": "Conductors shall be considered outside of a building or other structure under any of the following conditions: Where installed under not less than 50 mm (2 in.) of concrete beneath a building or other structureWhere installed within a building or other structure in a raceway that is encased in concrete or brick not less than 50 mm (2 in.) thickWhere installed in any vault that meets the construction requirements of Part III of Article 450Where installed in conduit and under not less than 450 mm (18 in.) of earth beneath a building or other structureWhere installed within rigid metal conduit (RMC) or intermediate metal conduit (IMC) used to accommodate the clearance requirements in 230.24 and routed directly through an eave but not a wall of a building [230.6](https://2023.antflix.net#230.6)", + "displayTitle": "230.6 Conductors Considered Outside the Building", + "children": [], + "url": "https://2023.antflix.net#230.6" + }, + { + "body": "Circuit conductors other than service conductors, shall not be installed in the same raceway, cable, handhole enclosure, or underground box as the service conductors. Exception No. 1: Grounding electrode conductors or supply side bonding jumpers or conductors shall be permitted within service raceways. Exception No. 2: Load management control conductors having overcurrent protection shall be permitted within service raceways. [230.7](https://2023.antflix.net#230.7)", + "displayTitle": "230.7 Other Conductors", + "children": [], + "url": "https://2023.antflix.net#230.7" + }, + { + "body": "Where a service raceway enters a building or structure, it shall be sealed in accordance with 300.5(G) and 300.7(A). Spare or unused raceways shall also be sealed. Sealants shall be identified for use with the cable insulation, conductor insulation, bare conductor, shield, or other components. [230.8](https://2023.antflix.net#230.8)", + "displayTitle": "230.8 Raceway Seal", + "children": [], + "url": "https://2023.antflix.net#230.8" + }, + { + "body": "Service conductors and final spans shall comply with 230.9(A), (B), and (C). [230.9](https://2023.antflix.net#230.9)", + "displayTitle": "230.9 Clearances on Buildings", + "children": [ + { + "body": "Service conductors installed as open conductors or multiconductor cable without an overall outer jacket shall have a clearance of not less than 900 mm (3 ft) from windows that are designed to be opened, doors, porches, balconies, ladders, stairs, fire escapes, or similar locations. Exception: Conductors run above the top level of a window shall be permitted to be less than the 900 mm (3 ft) requirement. [230.9_(A)](https://2023.antflix.net#230.9_(A))", + "displayTitle": "(A) Clearances", + "children": [], + "url": "https://2023.antflix.net#230.9_(A)" + }, + { + "body": "The vertical clearance of final spans above, or within 900 mm (3 ft) measured horizontally of platforms, projections, or surfaces that will permit personal contact shall be maintained in accordance with 230.24(B). [230.9_(B)](https://2023.antflix.net#230.9_(B))", + "displayTitle": "(B) Vertical Clearance", + "children": [], + "url": "https://2023.antflix.net#230.9_(B)" + }, + { + "body": "Overhead service conductors shall not be installed beneath openings through which materials may be moved, such as openings in farm and commercial buildings, and shall not be installed where they obstruct entrance to these building openings. [230.9_(C)](https://2023.antflix.net#230.9_(C))", + "displayTitle": "(C) Building Openings", + "children": [], + "url": "https://2023.antflix.net#230.9_(C)" + } + ], + "url": "https://2023.antflix.net#230.9" + }, + { + "body": "Vegetation such as trees shall not be used for support of overhead service conductors or service equipment. [230.10](https://2023.antflix.net#230.10)", + "displayTitle": "230.10 Vegetation as Support", + "children": [], + "url": "https://2023.antflix.net#230.10" + }, + { + "displayTitle": "Part II Overhead Service Conductors", + "children": [], + "url": "https://2023.antflix.net#divider_4_II" + }, + { + "body": "Individual conductors shall be insulated or covered. Exception: The grounded conductor of a multiconductor cable shall be permitted to be bare. [230.22](https://2023.antflix.net#230.22)", + "displayTitle": "230.22 Insulation or Covering", + "children": [], + "url": "https://2023.antflix.net#230.22" + }, + { + "displayTitle": "230.23 Size and Ampacity", + "children": [ + { + "body": "Conductors shall have sufficient ampacity to carry the current for the load as calculated in accordance with Parts II through V of Article 220 and shall have adequate mechanical strength. [230.23_(A)](https://2023.antflix.net#230.23_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#230.23_(A)" + }, + { + "body": "The conductors shall not be smaller than 8 AWG copper or 6 AWG aluminum or copper-clad aluminum. Exception: Conductors supplying only limited loads of a single branch circuit - such as small polyphase power, controlled water healers, and similar loads - shall not be smaller than 12 AWG hard-drawn copper or equivalent. [230.23_(B)](https://2023.antflix.net#230.23_(B))", + "displayTitle": "(B) Minimum Size", + "children": [], + "url": "https://2023.antflix.net#230.23_(B)" + }, + { + "body": "The grounded conductor shall not be less than the minimum size as required by 250.24(D). [230.23_(C)](https://2023.antflix.net#230.23_(C))", + "displayTitle": "(C) Grounded Conductors", + "children": [], + "url": "https://2023.antflix.net#230.23_(C)" + } + ], + "url": "https://2023.antflix.net#230.23" + }, + { + "body": "Overhead service conductors shall not be readily accessible and shall comply with 230.24(A) through (E) for services not over 1000 volts, nominal. [230.24](https://2023.antflix.net#230.24)", + "displayTitle": "230.24 Clearances", + "children": [ + { + "body": "Conductors shall have a vertical clearance of not less than 2.6 m (8 ft 6 in.) above the roof surface. The vertical clearance above the roof level shall be maintained for a distance of not less than 900 mm (3 ft) in all directions from the edge of the roof. Exception No. 1: The area above a roof surface subject to pedestrian or vehicular traffic shall have a vertical clearance from the roof surface in accordance with the clearance requirements of 230.24(B). Exception No. 2: Where the voltage between conductors does not exceed 300 and the roof has a slope of 100 mm in 300 mm (4 in. in 12 in.) or greater, a reduction in clearance to 900 mm (3 ft) shall be permitted. Exception No. 3: Where the voltage between conductors does not exceed 300, a reduction in clearance above only the overhanging portion of the roof to not less than 450 mm (18 in.) shall be permitted if (1) not more than 1.8 m (6 ft) of overhead service conductors, 1.2 m (4 ft) horizontally, pass above the roof overhang, and (2) they are terminated at a through-the-roof raceway or approved support. Informational Note: Sec 230.28 for mast supports. Exception No. 4: The requirement for maintaining the vertical clearance 900 mm (3 ft) from the edge of the roof shall not apply to the final conductor span where the service drop or overhead service conductors are attached to the side of a building. Exception No. 5: Where the voltage between conductors does not exceed 300 and the roof area is guarded or isolated, a reduction in clearance to 900 mm (3 ft) shall be permitted. [230.24_(A)](https://2023.antflix.net#230.24_(A))", + "displayTitle": "(A) Above Roofs", + "children": [], + "url": "https://2023.antflix.net#230.24_(A)" + }, + { + "body": "Overhead service conductors, where not in excess of 1000 volts, nominal, shall have the following minimum clearance from final grade: 3.0 m (10 ft) - at the electrical service entrance to buildings, also at the lowest point of the drip loop of the building electrical entrance, and above areas or sidewalks accessible only to pedestrians, measured from final grade or other accessible surface only for overhead service conductors supported on and cabled together with a grounded bare messenger where the voltage does not exceed 150 volts to ground3.7 m (12 ft) - over residential property and driveways, and those commercial areas not subject to truck traffic where the voltage does not exceed 300 volts to ground4.5 m (15 ft) - for those areas listed in the 3.7 m (12 ft) classification where the voltage exceeds 300 volts to ground5.5 m (18 ft) - over public streets, alleys, roads, parking areas subject to truck traffic, driveways on other than residential property, and other land such as cultivated, grazing, forest, and orchard7.5 m (241/2 ft) over tracks of railroads [230.24_(B)](https://2023.antflix.net#230.24_(B))", + "displayTitle": "(B) Vertical Clearance for Overhead Service Conductors", + "children": [], + "url": "https://2023.antflix.net#230.24_(B)" + }, + { + "body": "Clearances from building openings shall comply with 230.9(C). [230.24_(C)](https://2023.antflix.net#230.24_(C))", + "displayTitle": "(C) Clearance From Building Openings", + "children": [], + "url": "https://2023.antflix.net#230.24_(C)" + }, + { + "body": "Clearances from swimming pools, fountains, and similar installations shall comply with 680.9. [230.24_(D)](https://2023.antflix.net#230.24_(D))", + "displayTitle": "(D) Clearance From Swimming Pools, Fountains, and Similar Installations", + "children": [], + "url": "https://2023.antflix.net#230.24_(D)" + }, + { + "body": "Clearance from communication wires and cables shall be in accordance with 800.44(A)(4). [230.24_(E)](https://2023.antflix.net#230.24_(E))", + "displayTitle": "(E) Clearance From Communication Wires and Cables", + "children": [], + "url": "https://2023.antflix.net#230.24_(E)" + } + ], + "url": "https://2023.antflix.net#230.24" + }, + { + "body": "The point of attachment of the overhead service conductors to a building or other structure shall provide the minimum clearances as specified in 230.9 and 230.24. In no case shall this point of attachment be less than 3.0 m (10 ft) above finished grade. [230.26](https://2023.antflix.net#230.26)", + "displayTitle": "230.26 Point of Attachment", + "children": [], + "url": "https://2023.antflix.net#230.26" + }, + { + "body": "Multiconductor cables used for overhead service conductors shall be attached to buildings or other structures by fittings identified for use with service conductors. Open conductors shall be attached to fittings identified for use with service conductors or to noncombustible, nonabsorbent insulators securely attached to the building or other structure. [230.27](https://2023.antflix.net#230.27)", + "displayTitle": "230.27 Means of Attachment", + "children": [], + "url": "https://2023.antflix.net#230.27" + }, + { + "body": "Only power service-drop or overhead service conductors shall be permitted to be attached to a service mast. Service masts used for the support of service-drop or overhead service conductors shall be installed in accordance with 230.28(A) and (B). [230.28](https://2023.antflix.net#230.28)", + "displayTitle": "230.28 Service Masts as Supports", + "children": [ + { + "body": "The service mast shall be of adequate strength or be supported by braces or guy wires to withstand safely the strain imposed by the service-drop or overhead service conductors. Hubs intended for use with a conduit that serves as a service mast shall be identified for use with service-entrance equipment. [230.28_(A)](https://2023.antflix.net#230.28_(A))", + "displayTitle": "(A) Strength", + "children": [], + "url": "https://2023.antflix.net#230.28_(A)" + }, + { + "body": "Service-drop or overhead service conductors shall not be attached to a service mast between a weatherhead or the end of the conduit and a coupling, where the coupling is located above the last point of securement to the building or other structure or is located above the building or other structure. [230.28_(B)](https://2023.antflix.net#230.28_(B))", + "displayTitle": "(B) Attachment", + "children": [], + "url": "https://2023.antflix.net#230.28_(B)" + } + ], + "url": "https://2023.antflix.net#230.28" + }, + { + "body": "Service conductors passing over a roof shall be securely supported by substantial structures. For a grounded system, where the substantial structure is metal, it shall be bonded by means of a bonding jumper and listed connector to the grounded overhead service conductor. Where practicable, such supports shall be independent of the building. [230.29](https://2023.antflix.net#230.29)", + "displayTitle": "230.29 Supports Over Buildings", + "children": [], + "url": "https://2023.antflix.net#230.29" + }, + { + "displayTitle": "Part III Underground Service Conductors", + "children": [], + "url": "https://2023.antflix.net#divider_3_III" + }, + { + "displayTitle": "230.30 Installation", + "children": [ + { + "body": "Underground service conductors shall be insulated for the applied voltage. Exception: A grounded conductor shall be permitted to be uninsulated as follows: (1) Bare copper used in a raceway (2) Bare copper for direct burial where bare copper is approved for the soil conditions (3) Bare copper for direct burial without regard to soil conditions where part of a cable assembly identified for underground use (4) Aluminum or copper-clad aluminum without individual insulation or covering where part of a cable assembly identified for underground use in a raceway or for direct burial [230.30_(A)](https://2023.antflix.net#230.30_(A))", + "displayTitle": "(A) Insulation", + "children": [], + "url": "https://2023.antflix.net#230.30_(A)" + }, + { + "body": "Underground service conductors shall be installed in accordance with the applicable requirements of this Code covering the type of wiring method used and shall be limited to the following methods: RMC conduitIMC conduitType NUCC conduitHDPE conduitPVC conduitRTRC conduitType IGS cableType USE conductors or cablesType MV or Type MC cable identified for direct burial applicationsType MI cable where suitably protected against physical damage and corrosive conditionsType TC-ER cable where identified for service entrance use and direct burial applications [230.30_(B)](https://2023.antflix.net#230.30_(B))", + "displayTitle": "(B) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#230.30_(B)" + } + ], + "url": "https://2023.antflix.net#230.30" + }, + { + "displayTitle": "230.31 Size and Ampacity", + "children": [ + { + "body": "Underground service conductors shall have sufficient ampacity to carry the current for the load as calculated in accordance with Parts II through V of Article 220. [230.31_(A)](https://2023.antflix.net#230.31_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#230.31_(A)" + }, + { + "body": "The conductors shall not be smaller than 8 AWG copper or 6 AWG aluminum or copper-clad aluminum. Exception: Conductors supplying only limited loads of a single branch circuit - such as small polyphase power, controlled water heaters, and similar loads - shall not be smaller than 12 AWG copper or 10 AWG aluminum or copper-clad aluminum. [230.31_(B)](https://2023.antflix.net#230.31_(B))", + "displayTitle": "(B) Minimum Size", + "children": [], + "url": "https://2023.antflix.net#230.31_(B)" + }, + { + "body": "The grounded conductor shall not be smaller than the minimum size required by 250.24(D). [230.31_(C)](https://2023.antflix.net#230.31_(C))", + "displayTitle": "(C) Grounded Conductors", + "children": [], + "url": "https://2023.antflix.net#230.31_(C)" + } + ], + "url": "https://2023.antflix.net#230.31" + }, + { + "body": "Underground service conductors shall be protected against damage in accordance with 300.5. Service conductors entering a building or other structure shall be installed in accordance with 230.6 or protected by a raceway wiring method identified in 230.43. [230.32](https://2023.antflix.net#230.32)", + "displayTitle": "230.32 Protection Against Damage", + "children": [], + "url": "https://2023.antflix.net#230.32" + }, + { + "body": "Service conductors shall be permitted to be spliced or tapped in accordance with 110.14, 230.46, 300.5(E), 300.13, and 300.15. [230.33](https://2023.antflix.net#230.33)", + "displayTitle": "230.33 Spliced Conductors", + "children": [], + "url": "https://2023.antflix.net#230.33" + }, + { + "displayTitle": "Part IV Service-Entrance Conductors", + "children": [], + "url": "https://2023.antflix.net#divider_0_IV" + }, + { + "body": "Each service drop, set of overhead service conductors, set of underground service conductors, or service lateral shall supply only one set of service-entrance conductors. Exception No. 1: A building with more than one occupancy shall be permitted to have one set of service-entrance conductors for each service, as permitted in 230.2, run to each occupancy or group of occupancies. If the number of service disconnect locations for any given classification of service does not exceed six, the requirements of 230.2(E) shall apply at each location. If the number of service disconnect locations exceeds six for any given supply classification, the following conditions shall apply: (1) All service disconnect locations for all supply characteristics, together with any branch circuit or feeder supply sources, shall be clearly described using graphics or text, or both, on one or more plaques (2) The plaques shall be located in an approved, readily accessible location(s) on the building or structure served and as near as practicable to the point(s) of attachment or entry(ies) for each service drop or service lateral and for each set of overhead or underground service conductors. Exception No. 2: Where two to six service disconnecting means in separate enclosures are grouped at one location and supply separate loads from one service drop, set of overhead service conductors, set of underground service conductors, or service lateral, one set of service-entrance conductors shall be permitted to supply each or several such service equipment enclosures. Exception No. 3: A one-family dwelling unit and its accessory structures shall be permitted to have one set of service-entrance conductors run to each from a single service drop, set of overhead service conductors, set of underground service conductors, or service lateral. Exception No. 4: Two-family dwellings, multifamily dwellings, and multiple occupancy buildings shall be permitted to have one set of service-entrance conductors installed to supply the circuits covered in 210.25. Exception No. 5: One set of service-entrance conductors connected to the supply side of the normal service disconnecting means shall be permitted to supply each or several systems covered by 230.82(5) or 230.82(6). [230.40](https://2023.antflix.net#230.40)", + "displayTitle": "230.40 Number of Service-Entrance Conductor Sets", + "children": [], + "url": "https://2023.antflix.net#230.40" + }, + { + "body": "Service-entrance conductors entering or on the exterior of buildings or other structures shall be insulated. Exception: A grounded conductor shall be permitted to be uninsulated as follows: (1) Bare copper used in a raceway or part of a service cable assembly (2) Bare copper for direct burial where bare copper is approved for the soil conditions (3) Bare copper for direct burial without regard to soil conditions where part of a cable assembly identified for underground use (4) Aluminum or copper-clad aluminum without individual insulation or covering where part of a cable assembly or identified for underground use in a raceway, or for direct burial (5) Bare conductors used in an auxiliary gutter [230.41](https://2023.antflix.net#230.41)", + "displayTitle": "230.41 Insulation of Service-Entrance Conductors", + "children": [], + "url": "https://2023.antflix.net#230.41" + }, + { + "displayTitle": "230.42 Minimum Size and Ampacity", + "children": [ + { + "body": "Service-entrance conductors shall have an ampacity of not less than the maximum load to be served. Conductors shall be sized not less than the largest of 230.42(A)(1) or (A)(2). Loads shall be determined in accordance with Part III, IV, or V of Article 220, as applicable. Ampacity shall be determined from 310.14 and shall comply with 110.14(C). The maximum current of busways shall be that value for which the busway has been listed or labeled. Informational Note: See UL 857, Standard for Safety for Busways, for information on busways. [230.42_(A)](https://2023.antflix.net#230.42_(A))", + "displayTitle": "(A) General", + "children": [ + { + "body": "Where the service-entrance conductors supply continuous loads or any combination of noncontinuous and continuous loads, the minimum service-entrance conductor size shall have an ampacity not less than the sum of the noncontinuous loads plus 125 percent of continuous loads. Exception No. 1: Grounded conductors that are not connected to an overcurrent device shall be permitted to be sized at 100 percent of the sum of the continuous and noncontinuous load. Exception No. 2: The sum of the noncontinuous load and the continuous load if the service-entrance conductors terminate in an overcurrent device where both the overcurrent device and its assembly are listed for operation at 100 percent of their rating shall be permitted. [230.42_(A)_(1)](https://2023.antflix.net#230.42_(A)_(1))", + "displayTitle": "(1) Continuous and Noncontinuous Loads", + "children": [], + "url": "https://2023.antflix.net#230.42_(A)_(1)" + }, + { + "body": "The minimum service-entrance conductor size shall have an ampacity not less than the maximum load to be served after the application of any adjustment or correction factors. [230.42_(A)_(2)](https://2023.antflix.net#230.42_(A)_(2))", + "displayTitle": "(2) Application of Adjustment or Correction Factors", + "children": [], + "url": "https://2023.antflix.net#230.42_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#230.42_(A)" + }, + { + "body": "In addition to the requirements of 230.42(A), the minimum ampacity for ungrounded conductors for specific installations shall not be less than the rating of the service disconnecting means specified in 230.79(A) through (D). [230.42_(B)](https://2023.antflix.net#230.42_(B))", + "displayTitle": "(B) Specific Installations", + "children": [], + "url": "https://2023.antflix.net#230.42_(B)" + }, + { + "body": "The grounded conductor shall not be smaller than the minimum size as required by 250.24(D). [230.42_(C)](https://2023.antflix.net#230.42_(C))", + "displayTitle": "(C) Grounded Conductors", + "children": [], + "url": "https://2023.antflix.net#230.42_(C)" + } + ], + "url": "https://2023.antflix.net#230.42" + }, + { + "body": "Service-entrance conductors shall be installed in accordance with the applicable requirements of this Code covering the type of wiring method used and shall be limited to the following methods: Open wiring on insulatorsType IGS cableRigid metal conduit (RMC)Intermediate metal conduit (IMC)Electrical metallic tubing (EMT)Electrical nonmetallic tubingService-entrance cablesWirewaysBuswaysAuxiliary guttersRigid polyvinyl chloride conduit (PVC)CablebusType MC cableMineral-insulated, metal-sheathed cable, Type MIFlexible metal conduit (FMC) not over 1.8 m (6 ft) long or liquidtight flexible metal conduit (LFMC) not over 1.8 m (6 ft) long between a raceway, or between a raceway and service equipment, with a supply-side bonding jumper routed with the flexible metal conduit (FMC) or the liquidtight flexible metal conduit (LFMC) according to 250.102(A), (B), (C), and (E)Liquidtight flexible nonmetallic conduit (LFNC)High density polyethylene conduit (HDPE)Nonmetallic underground conduit with conductors (NUCC)Reinforced thermosetting resin conduit (RTRC)Type TC-ER cable where identified for use as service entrance conductorsFlexible bus systems [230.43](https://2023.antflix.net#230.43)", + "displayTitle": "230.43 Wiring Methods for 1000 Volts, Nominal, or Less", + "children": [], + "url": "https://2023.antflix.net#230.43" + }, + { + "body": "Cable tray systems shall be permitted to support service-entrance conductors. Cable trays used to support service-entrance conductors shall contain only service-entrance conductors and shall be limited to the following methods: Type SE cableType MC cableType MI cableType IGS cableSingle conductors 1/0 and larger that are listed for use in cable trayType TC-ER cableSuch cable trays shall be identified with permanently affixed labels with the wording \"Service-Entrance Conductors.\" The labels shall be located so as to be visible after installation with a spacing not to exceed 3 m (10 ft) so that the service-entrance conductors are able to be readily traced through the entire length of the cable tray.Exception: Conductors, other than service-entrance conductors, shall be permitted to be installed in a cable tray with service-entrance conductors, provided a solid fixed barrier identified for use with the cable tray is installed to separate the service-entrance conductors from other conductors installed in the cable tray. [230.44](https://2023.antflix.net#230.44)", + "displayTitle": "230.44 Cable Trays", + "children": [], + "url": "https://2023.antflix.net#230.44" + }, + { + "body": "Service-entrance conductors shall be permitted to be spliced or tapped in accordance with 110.14, 300.5(E), 300.13, and 300.15. Power distribution blocks, pressure connectors, and devices for splices and taps shall be listed. Power distribution blocks installed on service conductors shall be marked \"suitable for use on the line side of the service equipment\" or equivalent. Pressure connectors and devices for splices and taps installed on service conductors shall be marked \"suitable for use on the line side of the service equipment\" or equivalent. [230.46](https://2023.antflix.net#230.46)", + "displayTitle": "230.46 Spliced and Tapped Conductors", + "children": [], + "url": "https://2023.antflix.net#230.46" + }, + { + "displayTitle": "230.50 Protection Against Physical Damage", + "children": [ + { + "body": "Underground service-entrance conductors shall be protected against physical damage in accordance with 300.5. [230.50_(A)](https://2023.antflix.net#230.50_(A))", + "displayTitle": "(A) Underground Service-Entrance Conductors", + "children": [], + "url": "https://2023.antflix.net#230.50_(A)" + }, + { + "body": "All other service-entrance conductors, other than underground service entrance conductors, shall be protected against physical damage as specified in 230.50(B)(1) or (B)(2). [230.50_(B)](https://2023.antflix.net#230.50_(B))", + "displayTitle": "(B) All Other Service-Entrance Conductors", + "children": [ + { + "body": "Service-entrance cables, where subject to physical damage, shall be protected by any of the following: Rigid metal conduit (RMC)Intermediate metal conduit (IMC)Schedule 80 PVC conduitElectrical metallic tubing (EMT)Reinforced thermosetting resin conduit (RTRC)Other approved means [230.50_(B)_(1)](https://2023.antflix.net#230.50_(B)_(1))", + "displayTitle": "(1) Service-Entrance Cables", + "children": [], + "url": "https://2023.antflix.net#230.50_(B)_(1)" + }, + { + "body": "Individual open conductors and cables, other than service-entrance cables, shall not be installed within 3.0 m (10 ft) of grade level or where exposed to physical damage. Exception: Type MI and Type MC cable shall be permitted within 3.0 m (10 ft) of grade level where not exposed to physical damage or where protected in accordance with 300.5(D). [230.50_(B)_(2)](https://2023.antflix.net#230.50_(B)_(2))", + "displayTitle": "(2) Other Than Service-Entrance Cables", + "children": [], + "url": "https://2023.antflix.net#230.50_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#230.50_(B)" + } + ], + "url": "https://2023.antflix.net#230.50" + }, + { + "body": "Service-entrance cables or individual open service-entrance conductors shall be supported as specified in 230.51 (A), (B), or (C). [230.51](https://2023.antflix.net#230.51)", + "displayTitle": "230.51 Mounting Supports", + "children": [ + { + "body": "Service-entrance cables shall be supported by straps or other approved means within 300 mm (12 in.) of every service head, gooseneck, or connection to a raceway or enclosure and at intervals not exceeding 750 mm (30 in.). [230.51_(A)](https://2023.antflix.net#230.51_(A))", + "displayTitle": "(A) Service-Entrance Cables", + "children": [], + "url": "https://2023.antflix.net#230.51_(A)" + }, + { + "body": "Cables that are not approved for mounting in contact with a building or other structure shall be mounted on insulating supports installed at intervals not exceeding 4.5 m (15 ft) and in a manner that maintains a clearance of not less than 50 mm (2 in.) from the surface over which they pass. [230.51_(B)](https://2023.antflix.net#230.51_(B))", + "displayTitle": "(B) Other Cables", + "children": [], + "url": "https://2023.antflix.net#230.51_(B)" + }, + { + "body": "Individual open conductors shall be installed in accordance with Table 230.51(C). Where exposed to the weather, the conductors shall be mounted on insulators or on insulating supports attached to racks, brackets, or other approved means. Where not exposed to the weather, the conductors shall be mounted on glass or porcelain knobs. Table 230.51 (C) Supports Maximum Volts Maximum Distance Between Supports Minimum Clearance Between Conductors From Surface m ft mm in. mm in. 1000 2.7 9 150 6 50 2 1000 4.5 15 300 12 50 2 300 1.4 41/2 75 3 50 2 1000* 1.4* 41/2* 65* 21/2* 25* 1* *Where not exposed to weather. [230.51_(C)](https://2023.antflix.net#230.51_(C))", + "displayTitle": "(C) Individual Open Conductors", + "children": [], + "url": "https://2023.antflix.net#230.51_(C)" + } + ], + "url": "https://2023.antflix.net#230.51" + }, + { + "body": "Where individual open conductors enter a building or other structure, they shall enter through roof bushings or through the wall in an upward slant through individual, noncombustible, nonabsorbent insulating tubes. Drip loops shall be formed on the conductors before they enter the tubes. [230.52](https://2023.antflix.net#230.52)", + "displayTitle": "230.52 Individual Conductors Entering Buildings or Other Structures", + "children": [], + "url": "https://2023.antflix.net#230.52" + }, + { + "body": "Where exposed to the weather, raceways enclosing service-entrance conductors shall be listed or approved for use in wet locations and arranged to drain. Where embedded in masonry, raceways shall be arranged to drain. [230.53](https://2023.antflix.net#230.53)", + "displayTitle": "230.53 Raceways to Drain", + "children": [], + "url": "https://2023.antflix.net#230.53" + }, + { + "displayTitle": "230.54 Overhead Service Locations", + "children": [ + { + "body": "Service raceways shall be equipped with a service head at the point of connection to service-drop or overhead service conductors. The service head shall be listed for use in wet locations. [230.54_(A)](https://2023.antflix.net#230.54_(A))", + "displayTitle": "(A) Service Head", + "children": [], + "url": "https://2023.antflix.net#230.54_(A)" + }, + { + "body": "Service-entrance cables shall be equipped with a service head. The service head shall be listed for use in wet locations. Exception: Type SE cable shall be permitted to be formed in a gooseneck and taped with a self-sealing weather-resistant thermoplastic. [230.54_(B)](https://2023.antflix.net#230.54_(B))", + "displayTitle": "(B) Service-Entrance Cables Equipped With Service Head or Gooseneck", + "children": [], + "url": "https://2023.antflix.net#230.54_(B)" + }, + { + "body": "Service heads on raceways or service-entrance cables and goosenecks in service-entrance cables shall be located above the point of attachment of the service-drop or overhead service conductors to the building or other structure. Exception: Where it is impracticable to locate the service head or gooseneck above the point of attachment, the service head or gooseneck location shall be permitted not farther than 600 mm (24 in.) from the point of attachment. [230.54_(C)](https://2023.antflix.net#230.54_(C))", + "displayTitle": "(C) Service Heads and Goosenecks Above Service-Drop or Overhead Service Attachment", + "children": [], + "url": "https://2023.antflix.net#230.54_(C)" + }, + { + "body": "Service-entrance cables shall be held securely in place. [230.54_(D)](https://2023.antflix.net#230.54_(D))", + "displayTitle": "(D) Secured", + "children": [], + "url": "https://2023.antflix.net#230.54_(D)" + }, + { + "body": "Service heads shall have conductors of different potential brought out through separately bushed openings. Exception: For jacketed multiconductor service-entrance cable without splice. [230.54_(E)](https://2023.antflix.net#230.54_(E))", + "displayTitle": "(E) Separately Bushed Openings", + "children": [], + "url": "https://2023.antflix.net#230.54_(E)" + }, + { + "body": "Drip loops shall be formed on individual conductors. To prevent the entrance of moisture, service-entrance conductors shall be connected to the service-drop or overhead service conductors either (1) below the level of the service head or (2) below the level of the termination of the service-entrance cable sheath. [230.54_(F)](https://2023.antflix.net#230.54_(F))", + "displayTitle": "(F) Drip Loops", + "children": [], + "url": "https://2023.antflix.net#230.54_(F)" + }, + { + "body": "Service-entrance and overhead service conductors shall be arranged so that water will not enter service raceway or equipment. [230.54_(G)](https://2023.antflix.net#230.54_(G))", + "displayTitle": "(G) Arranged That Water Will Not Enter Service Raceway or Equipment", + "children": [], + "url": "https://2023.antflix.net#230.54_(G)" + } + ], + "url": "https://2023.antflix.net#230.54" + }, + { + "body": "On a 4-wire, delta-connected service where the midpoint of one phase winding is grounded, the service conductor having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is orange in color, or by other effective means, at each termination or junction point. [230.56](https://2023.antflix.net#230.56)", + "displayTitle": "230.56 Service Conductor With the Higher Voltage to Ground", + "children": [], + "url": "https://2023.antflix.net#230.56" + }, + { + "displayTitle": "Part V Service Equipment - General", + "children": [], + "url": "https://2023.antflix.net#divider_0_V" + }, + { + "body": "Energized parts of service equipment shall be enclosed as specified in 230.62(A) or guarded as specified in 230.62(B). [230.62](https://2023.antflix.net#230.62)", + "displayTitle": "230.62 Service Equipment - Enclosed or Guarded", + "children": [ + { + "body": "Energized parts shall be enclosed so that they will not be exposed to accidental contact or shall be guarded as in 230.62(B). [230.62_(A)](https://2023.antflix.net#230.62_(A))", + "displayTitle": "(A) Enclosed", + "children": [], + "url": "https://2023.antflix.net#230.62_(A)" + }, + { + "body": "Energized parts that are not enclosed shall be installed on a switchboard, panelboard, or control board and guarded in accordance with 110.18 and 110.27. Where energized parts are guarded as provided in 110.27(A)(1) and (A)(2), a means for locking or sealing doors providing access to energized parts shall be provided. [230.62_(B)](https://2023.antflix.net#230.62_(B))", + "displayTitle": "(B) Guarded", + "children": [], + "url": "https://2023.antflix.net#230.62_(B)" + }, + { + "body": "Barriers shall be placed in service equipment such that no uninsulated, ungrounded service busbar or service terminal is exposed to inadvertent contact by persons or maintenance equipment while servicing load terminations with the service disconnect in the open position. [230.62_(C)](https://2023.antflix.net#230.62_(C))", + "displayTitle": "(C) Barriers", + "children": [], + "url": "https://2023.antflix.net#230.62_(C)" + } + ], + "url": "https://2023.antflix.net#230.62" + }, + { + "displayTitle": "230.66 Marking", + "children": [ + { + "body": "Service equipment rated at 1000 volts or less shall be marked to identify it as being suitable for use as service equipment. All service equipment shall be listed or field evaluated. [230.66_(A)](https://2023.antflix.net#230.66_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#230.66_(A)" + }, + { + "body": "Meter sockets shall not be considered service equipment but shall be listed and rated for the voltage and current rating of the service. Exception: Meter sockets supplied by and under the exclusive control of an electric utility shall not be required to be listed. [230.66_(B)](https://2023.antflix.net#230.66_(B))", + "displayTitle": "(B) Meter Sockets", + "children": [], + "url": "https://2023.antflix.net#230.66_(B)" + } + ], + "url": "https://2023.antflix.net#230.66" + }, + { + "displayTitle": "230.67 Surge Protection", + "children": [ + { + "body": "All services supplying the following occupancies shall be provided with a surge-protective device (SPD): Dwelling unitsDormitory unitsGuest rooms and guest suites of hotels and motelsAreas of nursing homes and limited-care facilities used exclusively as patient sleeping roomsInformational Note: See 517.10(B)(2). [230.67_(A)](https://2023.antflix.net#230.67_(A))", + "displayTitle": "(A) Surge-Protective Device", + "children": [], + "url": "https://2023.antflix.net#230.67_(A)" + }, + { + "body": "The SPD shall be an integral part of the service equipment or shall be located immediately adjacent thereto. Exception: The SPD shall not be required to be located at the service equipment as required in 230.67(B) if located at each next level distribution equipment downstream toward the load. [230.67_(B)](https://2023.antflix.net#230.67_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#230.67_(B)" + }, + { + "body": "The SPD shall be a Type 1 or Type 2 SPD. [230.67_(C)](https://2023.antflix.net#230.67_(C))", + "displayTitle": "(C) Type", + "children": [], + "url": "https://2023.antflix.net#230.67_(C)" + }, + { + "body": "Where service equipment is replaced, all of the requirements of this section shall apply. [230.67_(D)](https://2023.antflix.net#230.67_(D))", + "displayTitle": "(D) Replacement", + "children": [], + "url": "https://2023.antflix.net#230.67_(D)" + }, + { + "body": "SPDs shall have a nominal discharge current rating (In) of not less than 10kA. [230.67_(E)](https://2023.antflix.net#230.67_(E))", + "displayTitle": "(E) Ratings", + "children": [], + "url": "https://2023.antflix.net#230.67_(E)" + } + ], + "url": "https://2023.antflix.net#230.67" + }, + { + "displayTitle": "Part VI Service Equipment - Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#divider_0_VI" + }, + { + "body": "Means shall be provided to disconnect all ungrounded conductors in a building or other structure from the service conductors. [230.70](https://2023.antflix.net#230.70)", + "displayTitle": "230.70 General", + "children": [ + { + "body": "The service disconnecting means shall be installed in accordance with 230.70(A)(1), (A)(2), and (A)(3). [230.70_(A)](https://2023.antflix.net#230.70_(A))", + "displayTitle": "(A) Location", + "children": [ + { + "body": "The service disconnecting means shall be installed at a readily accessible location either outside of a building or structure or inside nearest the point of entrance of the service conductors. [230.70_(A)_(1)](https://2023.antflix.net#230.70_(A)_(1))", + "displayTitle": "(1) Readily Accessible Location", + "children": [], + "url": "https://2023.antflix.net#230.70_(A)_(1)" + }, + { + "body": "Service disconnecting means shall not be installed in bathrooms. [230.70_(A)_(2)](https://2023.antflix.net#230.70_(A)_(2))", + "displayTitle": "(2) Bathrooms", + "children": [], + "url": "https://2023.antflix.net#230.70_(A)_(2)" + }, + { + "body": "Where a remote control device(s) is used to actuate the service disconnecting means, the service disconnecting means shall be located in accordance with 230.70(A)(1). [230.70_(A)_(3)](https://2023.antflix.net#230.70_(A)_(3))", + "displayTitle": "(3) Remote Control", + "children": [], + "url": "https://2023.antflix.net#230.70_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#230.70_(A)" + }, + { + "body": "Each service disconnect shall be permanently marked to identify it as a service disconnect. [230.70_(B)](https://2023.antflix.net#230.70_(B))", + "displayTitle": "(B) Marking", + "children": [], + "url": "https://2023.antflix.net#230.70_(B)" + }, + { + "body": "Each service disconnecting means shall be suitable for the prevailing conditions. Service equipment installed in hazardous (classified) locations shall comply with the hazardous location requirements. [230.70_(C)](https://2023.antflix.net#230.70_(C))", + "displayTitle": "(C) Suitable for Use", + "children": [], + "url": "https://2023.antflix.net#230.70_(C)" + } + ], + "url": "https://2023.antflix.net#230.70" + }, + { + "body": "Each service shall have only one disconnecting means unless the requirements of 230.71 (B) are met. [230.71](https://2023.antflix.net#230.71)", + "displayTitle": "230.71 Maximum Number of Disconnects", + "children": [ + { + "body": "For the purpose of this section, disconnecting means installed as part of listed equipment and used solely for the following shall not be considered a service disconnecting means: Power monitoring equipmentSurge-protective device(s)Control circuit of the ground-fault protection systemPower-operable service disconnecting means [230.71_(A)](https://2023.antflix.net#230.71_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#230.71_(A)" + }, + { + "body": "Two to six service disconnects shall be permitted for each service permitted by 230.2 or for each set of service-entrance conductors permitted by 230.40, Exception No. 1, 3, 4, or 5. The two to six service disconnecting means shall be permitted to consist of a combination of any of the following: Separate enclosures with a main service disconnecting means in each enclosurePanelboards with a main service disconnecting means in each panelboard enclosureSwitchboard(s) where there is only one service disconnect in each separate vertical section with barriers provided between each vertical section to maintain the inadvertent contact protection required in 230.62 based on access from the adjacent section(s)Service disconnects in switchgear, transfer switches, or metering centers where each disconnect is located in a separate compartmentMetering centers with a main service disconnecting means in each metering centerMotor control center(s) where there is only one service disconnect in a motor control center unit and a maximum of two service disconnects provided in a single motor control center with barriers provided between each motor control center unit or compartment containing a service disconnect to maintain the inadvertent contact protection required in 230.62 based on access from adjacent motor control center unit(s) or compartment(s)Exception to (2), (3), (4), (5), and (6): Existing service equipment, installed in compliance with previous editions of this Code that permitted multiple service disconnecting means in a single enclosure, section, or compartment, shall be permitted to contain a maximum of six service disconnecting means.Informational Note No. 1: See UL 67, Standard for Panelboards, for information on metering centers.Informational Note No. 2: Examples of separate enclosures with a main service disconnecting means in each enclosure include but are not limited to motor control centers, fused disconnects, and circuit breaker enclosures.Informational Note No. 3: Transfer switches are provided with one service disconnect or multiple service disconnects in separate compartments. [230.71_(B)](https://2023.antflix.net#230.71_(B))", + "displayTitle": "(B) Two to Six Service Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#230.71_(B)" + } + ], + "url": "https://2023.antflix.net#230.71" + }, + { + "displayTitle": "230.72 Grouping of Disconnects", + "children": [ + { + "body": "The two to six disconnects, if permitted in 230.71, shall be grouped. Each disconnect shall be marked to indicate the load served. Exception: One of the two to six service disconnecting means permitted in 230.71, where used only for a water pump also intended to provide fire protection, shall be permitted to be located remote from the other disconnecting means. If remotely installed in accordance with this exception, a plaque shall be posted at the location of the remaining grouped disconnects denoting its location. [230.72_(A)](https://2023.antflix.net#230.72_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#230.72_(A)" + }, + { + "body": "The one or more additional service disconnecting means for fire pumps, emergency systems, legally required standby, or optional standby services permitted by 230.2 shall be installed remote from the one to six service disconnecting means for normal service to minimize the possibility of simultaneous interruption of supply. [230.72_(B)](https://2023.antflix.net#230.72_(B))", + "displayTitle": "(B) Additional Service Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#230.72_(B)" + }, + { + "body": "In a multiple-occupancy building, each occupant shall have access to the occupant's service disconnecting means. Exception: In a multiple-occupancy building where electric service and electrical maintenance are provided by the building management and where these are under continuous building management supervision, the service disconnecting means supplying more than one occupancy shall be permitted to be accessible to authorized management personnel only. [230.72_(C)](https://2023.antflix.net#230.72_(C))", + "displayTitle": "(C) Access to Occupants", + "children": [], + "url": "https://2023.antflix.net#230.72_(C)" + } + ], + "url": "https://2023.antflix.net#230.72" + }, + { + "body": "Each service disconnect shall simultaneously disconnect all ungrounded service conductors that it controls from the premises wiring system. [230.74](https://2023.antflix.net#230.74)", + "displayTitle": "230.74 Simultaneous Opening of Poles", + "children": [], + "url": "https://2023.antflix.net#230.74" + }, + { + "body": "Where the service disconnecting means does not disconnect the grounded conductor from the premises wiring, other means shall be provided for this purpose in the service equipment. A terminal or bus to which all grounded conductors can be attached by means of pressure connectors shall be permitted for this purpose. In a multisection switchboard or switchgear, disconnects for the grounded conductor shall be permitted to be in any section of the switchboard or switchgear, if the switchboard or switchgear section is marked to indicate a grounded conductor disconnect is located within. Informational Note: In switchgear or multisection switchboards, the disconnecting means provided for the grounded conductor is typically identified as a neutral disconnect link and is typically located in the bus to which the service grounded conductor is connected. [230.75](https://2023.antflix.net#230.75)", + "displayTitle": "230.75 Disconnection of Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#230.75" + }, + { + "body": "The service disconnecting means for ungrounded service conductors shall consist of one of the following: A manually operable switch or circuit breaker equipped with a handle or other suitable operating meansA power-operated switch or circuit breaker, provided the switch or circuit breaker can be opened by hand in the event of a power supply failure [230.76](https://2023.antflix.net#230.76)", + "displayTitle": "230.76 Manually or Power Operable", + "children": [], + "url": "https://2023.antflix.net#230.76" + }, + { + "body": "The service disconnecting means shall plainly indicate whether it is in the open (off) or closed (on) position. [230.77](https://2023.antflix.net#230.77)", + "displayTitle": "230.77 Indicating", + "children": [], + "url": "https://2023.antflix.net#230.77" + }, + { + "body": "The service disconnecting means shall have a rating not less than the calculated load to be carried, determined in accordance with Part III, IV, or V of Article 220, as applicable. In no case shall the rating be lower than specified in 230.79(A), (B), (C), or (D). [230.79](https://2023.antflix.net#230.79)", + "displayTitle": "230.79 Rating of Service Disconnecting Means", + "children": [ + { + "body": "For installations to supply only limited loads of a single branch circuit, the service disconnecting means shall have a rating of not less than 15 amperes. [230.79_(A)](https://2023.antflix.net#230.79_(A))", + "displayTitle": "(A) One-Circuit Installations", + "children": [], + "url": "https://2023.antflix.net#230.79_(A)" + }, + { + "body": "For installations consisting of not more than two 2-wire branch circuits, the service disconnecting means shall have a rating of not less than 30 amperes. [230.79_(B)](https://2023.antflix.net#230.79_(B))", + "displayTitle": "(B) Two-Circuit Installations", + "children": [], + "url": "https://2023.antflix.net#230.79_(B)" + }, + { + "body": "For a one-family dwelling, the service disconnecting means shall have a rating of not less than 100 amperes, 3-wire. [230.79_(C)](https://2023.antflix.net#230.79_(C))", + "displayTitle": "(C) One-Family Dwellings", + "children": [], + "url": "https://2023.antflix.net#230.79_(C)" + }, + { + "body": "For all other installations, the service disconnecting means shall have a rating of not less than 60 amperes. [230.79_(D)](https://2023.antflix.net#230.79_(D))", + "displayTitle": "(D) All Others", + "children": [], + "url": "https://2023.antflix.net#230.79_(D)" + } + ], + "url": "https://2023.antflix.net#230.79" + }, + { + "body": "Where the service disconnecting means consists of more than one switch or circuit breaker, as permitted by 230.71, the combined ratings of all the switches or circuit breakers used shall not be less than the rating required by 230.79. [230.80](https://2023.antflix.net#230.80)", + "displayTitle": "230.80 Combined Rating of Disconnects", + "children": [], + "url": "https://2023.antflix.net#230.80" + }, + { + "body": "The service conductors shall be connected to the service disconnecting means by pressure connectors, clamps, or other approved means. Connections that depend on solder shall not be used. [230.81](https://2023.antflix.net#230.81)", + "displayTitle": "230.81 Connection to Terminals", + "children": [], + "url": "https://2023.antflix.net#230.81" + }, + { + "body": "Only the following equipment shall be permitted to be connected to the supply side of the service disconnecting means: Cable limiters.Meters and meter sockets nominally rated not in excess of 1000 volts, if all metal housings and service enclosures are grounded in accordance with Part VII and bonded in accordance with Part V of Article 250.Meter disconnect switches nominally rated not in excess of 1000 volts that have a short-circuit current rating equal to or greater than the available fault current, if all metal housings and service enclosures are grounded in accordance with Part VII and bonded in accordance with Part V of Article 250. A meter disconnect switch shall be capable of interrupting the load served. A meter disconnect shall be legibly field marked on its exterior in a manner suitable for the environment as follows:METER DISCONNECT NOT SERVICE EQUIPMENTInstrument transformers (current and voltage), impedance shunts, load management devices, surge arresters, and Type 1 surge-protective devices.Conductors used to supply energy management systems, circuits for standby power systems, fire pump equipment, and fire and sprinkler alarms, if provided with service equipment and installed in accordance with requirements for service-entrance conductors.Solar photovoltaic systems, fuel cell systems, wind electric systems, energy storage systems, or interconnected electric power production sources, if provided with a disconnecting means listed as suitable for use as service equipment, and overcurrent protection as specified in Part VII of Article 230.Control circuits for power-operable service disconnecting means, if suitable overcurrent protection and disconnecting means are provided.Ground-fault protection systems or Type 2 surge-protective devices, where installed as part of listed equipment, if suitable overcurrent protection and disconnecting means are provided.Connections used only to supply listed communications equipment under the exclusive control of the serving electric utility, if suitable overcurrent protection and disconnecting means are provided. For installations of equipment by the serving electric utility, a disconnecting means is not required if the supply is installed as part of a meter socket, such that access can only be gained with the meter removed.Emergency disconnects in accordance with 230.85(B)(2) and (B)(3), if all metal housings and enclosures are grounded in accordance with Part VII and bonded in accordance with Part V of Article 250.Meter-mounted transfer switches nominally rated not in excess of 1000 volts that have a short-circuit current rating equal to or greater than the available fault current. A meter-mounted transfer switch shall be listed and be capable of transferring the load served. A meter-mounted transfer switch shall be marked on its exterior with both of the following:Meter-mounted transfer switchNot service equipmentControl power circuits for protective relays where installed as part of listed equipment, if overcurrent protection and disconnecting means are provided. [230.82](https://2023.antflix.net#230.82)", + "displayTitle": "230.82 Equipment Connected to the Supply Side of Service Disconnect", + "children": [], + "url": "https://2023.antflix.net#230.82" + }, + { + "body": "For one- and two-family dwelling units, an emergency disconnecting means shall be installed. [230.85](https://2023.antflix.net#230.85)", + "displayTitle": "230.85 Emergency Disconnects", + "children": [ + { + "displayTitle": "(A) General", + "children": [ + { + "body": "The disconnecting means shall be installed in a readily accessible outdoor location on or within sight of the dwelling unit. Exception: Where the requirements of 225.41 are met, this section shall not apply. [230.85_(A)_(1)](https://2023.antflix.net#230.85_(A)_(1))", + "displayTitle": "(1) Location", + "children": [], + "url": "https://2023.antflix.net#230.85_(A)_(1)" + }, + { + "body": "The disconnecting means shall have a short-circuit current rating equal to or greater than the available fault current. [230.85_(A)_(2)](https://2023.antflix.net#230.85_(A)_(2))", + "displayTitle": "(2) Rating", + "children": [], + "url": "https://2023.antflix.net#230.85_(A)_(2)" + }, + { + "body": "If more than one disconnecting means is provided, they shall be grouped. [230.85_(A)_(3)](https://2023.antflix.net#230.85_(A)_(3))", + "displayTitle": "(3) Grouping", + "children": [], + "url": "https://2023.antflix.net#230.85_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#230.85_(A)" + }, + { + "body": "Each disconnect shall be one of the following: Service disconnectA meter disconnect integral to the meter mounting equipment not marked as suitable only for use as service equipment installed in accordance with 230.82Other listed disconnect switch or circuit breaker that is marked suitable for use as service equipment, but not marked as suitable only for use as service equipment, installed on the supply side of each service disconnectInformational Note 1: Conductors between the emergency disconnect and the service disconnect in 230.85(2) and 230.85(3) are service conductors.Informational Note 2: Equipment marked \"Suitable only for use as service equipment\" includes the factory marking \"Service Disconnect\". [230.85_(B)](https://2023.antflix.net#230.85_(B))", + "displayTitle": "(B) Disconnects", + "children": [], + "url": "https://2023.antflix.net#230.85_(B)" + }, + { + "body": "Where service equipment is replaced, all of the requirements of this section shall apply. Exception: Where only meter sockets, service entrance conductors, or related raceways and fittings are replaced, the requirements of this section shall not apply. [230.85_(C)](https://2023.antflix.net#230.85_(C))", + "displayTitle": "(C) Replacement", + "children": [], + "url": "https://2023.antflix.net#230.85_(C)" + }, + { + "body": "Where equipment for isolation of other energy source systems is not located adjacent to the emergency disconnect required by this section, a plaque or directory identifying the location of all equipment for isolation of other energy sources shall be located adjacent to the disconnecting means required by this section. Informational Note: See 445.18, 480.7, 705.20, and 706.15 for examples of other energy source system isolation means. [230.85_(D)](https://2023.antflix.net#230.85_(D))", + "displayTitle": "(D) Identification of Other Isolation Disconnects", + "children": [], + "url": "https://2023.antflix.net#230.85_(D)" + }, + { + "displayTitle": "(E) Marking", + "children": [ + { + "body": "The disconnecting means shall marked as follows: Service disconnectEMERGENCY DISCONNECT, SERVICE DISCONNECTMeter disconnects installed in accordance with 230.82(3) and marked as follows:EMERGENCY DISCONNECT, METER DISCONNECT, NOT SERVICE EQUIPMENTOther listed disconnect switches or circuit breakers on the supply side of each service disconnect that are marked suitable for use as service equipment and marked as follows:EMERGENCY DISCONNECT, NOT SERVICE EQUIPMENT [230.85_(E)_(1)](https://2023.antflix.net#230.85_(E)_(1))", + "displayTitle": "(1) Marking Text", + "children": [], + "url": "https://2023.antflix.net#230.85_(E)_(1)" + }, + { + "body": "Markings shall comply with 110.21 (B) and both of the following: The marking or labels shall be located on the outside front of the disconnect enclosure with red background and white text.The letters shall be at least 13 mm (1/2 in.) high. [230.85_(E)_(2)](https://2023.antflix.net#230.85_(E)_(2))", + "displayTitle": "(2) Marking Location and Size", + "children": [], + "url": "https://2023.antflix.net#230.85_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#230.85_(E)" + } + ], + "url": "https://2023.antflix.net#230.85" + }, + { + "displayTitle": "Part VII Service Equipment - Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#divider_0_VII" + }, + { + "body": "Each ungrounded service conductor shall have overload protection. [230.90](https://2023.antflix.net#230.90)", + "displayTitle": "230.90 Where Required", + "children": [ + { + "body": "Such protection shall be provided by an overcurrent device in series with each ungrounded service conductor that has a rating or setting not higher than the ampacity of the conductor. A set of fuses shall be considered all the fuses required to protect all the ungrounded conductors of a circuit. Single-pole circuit breakers, grouped in accordance with 230.71(B), shall be considered as one protective device. Exception No. 1: For motor-starting currents, ratings that comply with 430.52, 430.62, and 430.63 shall be permitted. Exception No. 2: Fuses and circuit breakers with a rating or setting that complies with 240.4(B) or (C) and 240.6 shall be permitted. Exception No. 3: Two to six circuit breakers or sets of fuses shall be permitted as the overcurrent device to provide the overload protection. The sum of the ratings of the circuit breakers or fuses shall be permitted to exceed the ampacity of the service conductors, provided the calculated load does not exceed the ampacity of the service conductors. Exception No. 4: Overload protection for fire pump supply conductors shall comply with 695.4(B)(2)(a). Exception No. 5: Overload protection in accordance with the conductor ampacities of 310.12 shall be permitted for single-phase dwelling services. [230.90_(A)](https://2023.antflix.net#230.90_(A))", + "displayTitle": "(A) Ungrounded Conductor", + "children": [], + "url": "https://2023.antflix.net#230.90_(A)" + }, + { + "body": "No overcurrent device shall be inserted in a grounded service conductor except a circuit breaker that simultaneously opens all conductors of the circuit. [230.90_(B)](https://2023.antflix.net#230.90_(B))", + "displayTitle": "(B) Not in Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#230.90_(B)" + } + ], + "url": "https://2023.antflix.net#230.90" + }, + { + "body": "The service overcurrent device shall be an integral part of the service disconnecting means or shall be located immediately adjacent thereto. Where fuses are used as the service overcurrent device, the disconnecting means shall be located ahead of the supply side of the fuses. [230.91](https://2023.antflix.net#230.91)", + "displayTitle": "230.91 Location", + "children": [], + "url": "https://2023.antflix.net#230.91" + }, + { + "body": "Where the service overcurrent devices are locked or sealed or are not readily accessible to the occupant, branch-circuit or feeder overcurrent devices shall be installed on the load side, shall be mounted in a readily accessible location, and shall be of lower ampere rating than the service overcurrent device. [230.92](https://2023.antflix.net#230.92)", + "displayTitle": "230.92 Locked Service Overcurrent Devices", + "children": [], + "url": "https://2023.antflix.net#230.92" + }, + { + "body": "Where necessary to prevent tampering, an automatic overcurrent device that protects service conductors supplying only a specific load, such as a water heater, shall be permitted to be locked or sealed where located so as to be accessible. [230.93](https://2023.antflix.net#230.93)", + "displayTitle": "230.93 Protection of Specific Circuits", + "children": [], + "url": "https://2023.antflix.net#230.93" + }, + { + "body": "The overcurrent device shall protect all circuits and devices. Exception No. 1: The service switch shall be permitted on the supply side. Exception No. 2: High-impedance shunt circuits, surge arresters, Type 1 surge-protective devices, surge-protective capacitors, and instrument transformers (current and voltage) shall be permitted to be connected and installed on the supply side of the service disconnecting means as permitted by 230.82. Exception No. 3: Circuits for load management devices shall be permitted to be connected on the supply side of the service overcurrent device where separately provided with overcurrent protection. Exception No. 4: Circuits used only for the operation of fire alarm, other protective signaling systems, or the supply to fire pump equipment shall be permitted to be connected on the supply side of the service overcurrent device where separately provided with overcurrent protection. Exception No. 5: Meters nominally rated not in excess of 600 volts shall be permitted, provided all metal housings and service enclosures are grounded. Exception No. 6: Where service equipment is power operable, the control circuit shall be permitted to be connected ahead of the service equipment if suitable overcurrent protection and disconnecting means are provided. [230.94](https://2023.antflix.net#230.94)", + "displayTitle": "230.94 Relative Location of Overcurrent Device and Other Service Equipment", + "children": [], + "url": "https://2023.antflix.net#230.94" + }, + { + "body": "Ground-fault protection of equipment shall be provided for solidly grounded wye electric services of more than 150 volts to ground but not exceeding 1000 volts phase-to-phase for each service disconnect rated 1000 amperes or more. The grounded conductor for the solidly grounded wye system shall be connected directly to ground through a grounding electrode system, as specified in 250.50, without inserting any resistor or impedance device. The rating of the service disconnect shall be considered to be the rating of the largest fuse that can be installed or the highest continuous current trip setting for which the actual overcurrent device installed in a circuit breaker is rated or can be adjusted. Exception: The ground-fault protection provisions of this section shall not apply to a service disconnect for a continuous industrial process where a nonorderly shutdown will introduce additional or increased hazards. [230.95](https://2023.antflix.net#230.95)", + "displayTitle": "230.95 Ground-Fault Protection of Equipment", + "children": [ + { + "body": "The ground-fault protection system shall operate to cause the service disconnect to open all ungrounded conductors of the faulted circuit. The maximum setting of the ground-fault protection shall be 1200 amperes, and the maximum time delay shall be one second for ground-fault currents equal to or greater than 3000 amperes. [230.95_(A)](https://2023.antflix.net#230.95_(A))", + "displayTitle": "(A) Setting", + "children": [], + "url": "https://2023.antflix.net#230.95_(A)" + }, + { + "body": "If a switch and fuse combination is used, the fuses employed shall be capable of interrupting any current higher than the interrupting capacity of the switch during a time that the ground-fault protective system will not cause the switch to open. [230.95_(B)](https://2023.antflix.net#230.95_(B))", + "displayTitle": "(B) Fuses", + "children": [], + "url": "https://2023.antflix.net#230.95_(B)" + }, + { + "body": "The ground-fault protection system shall be performance tested when first installed on site. This testing shall be conducted by a qualified person(s) using a test process of primary current injection, in accordance with instructions that shall be provided with the equipment. A written record of this testing shall be made and shall be available to the authority having jurisdiction. Informational Note No. 1: Ground-fault protection that functions to open the service disconnect affords no protection from faults on the line side of the protective element. It serves only to limit damage to conductors and equipment on the load side in the event of an arcing ground fault on the load side of the protective element. Informational Note No. 2: This added protective equipment at the service equipment could make it necessary to review the overall wiring system for proper selective overcurrent protection coordination. Additional installations of ground-fault protective equipment might be needed on feeders and branch circuits where maximum continuity of electric service is necessary. Informational Note No. 3: Where ground-fault protection is provided for the service disconnect and interconnection is made with another supply system by a transfer device, means or devices could be needed to ensure proper ground-fault sensing by the ground-fault protection equipment. Informational Note No. 4: See 517.17(A) for information on where an additional step of ground-fault protection is required for hospitals and other buildings with critical areas or life support equipment. [230.95_(C)](https://2023.antflix.net#230.95_(C))", + "displayTitle": "(C) Performance Testing", + "children": [], + "url": "https://2023.antflix.net#230.95_(C)" + } + ], + "url": "https://2023.antflix.net#230.95" + } + ], + "url": "https://2023.antflix.net#230" + }, + { + "displayTitle": "Article 235 Branch Circuits, Feeders, and Services Over 1000 Volts AC, 1500 Volts DC, Nominal", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_5_I" + }, + { + "body": "This article provides the general requirements for branch circuits, feeders, and services over 1000 volts ac or 1500 volts dc, nominal. Informational Note: See ANSI/IEEE C2-2017, National Electrical Safety Code, for additional information on wiring over 1000 volts, nominal. [235.1](https://2023.antflix.net#235.1)", + "displayTitle": "235.1 Scope", + "children": [], + "url": "https://2023.antflix.net#235.1" + }, + { + "displayTitle": "Part II Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#divider_5_II" + }, + { + "body": "Table 235.3 lists references for specific equipment and applications not located in Chapters 5, 6, and 7 that amend or supplement the requirements of this article. Table 235.3 References for Specific Equipment and Applications Not Located in Chapters 5, 6, and 7 Equipment Article Section Air-conditioning and refrigerating equipment 440.6, 440.31, and 440.32 Busways 368.17 Central heating equipment other than fixed electric space-heating equipment 422.12 Fixed electric heating equipment for pipelines and vessels 427.4 Fixed electric space-heating equipment 424.4 Fixed outdoor electrical deicing and snow-melting equipment 426.4 Infrared lamp industrial heating equipment 422.48 and 424.3 Motors, motor circuits, and controllers 430 [235.3](https://2023.antflix.net#235.3)", + "displayTitle": "235.3 Other Articles for Specific-Purpose Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#235.3" + }, + { + "displayTitle": "235.5 Conductor Identification for Branch Circuits", + "children": [ + { + "body": "The grounded conductor of a branch circuit shall be identified in accordance with 200.6. [235.5_(A)](https://2023.antflix.net#235.5_(A))", + "displayTitle": "(A) Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#235.5_(A)" + }, + { + "body": "The equipment grounding conductor shall be identified in accordance with 250.119. [235.5_(B)](https://2023.antflix.net#235.5_(B))", + "displayTitle": "(B) Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#235.5_(B)" + }, + { + "body": "Ungrounded conductors shall be identified in accordance with 235.5(C)(1) or (C)(2), as applicable. [235.5_(C)](https://2023.antflix.net#235.5_(C))", + "displayTitle": "(C) Ungrounded Conductors", + "children": [ + { + "body": "Where the premises wiring system has branch circuits supplied from more than one nominal voltage system, each ungrounded conductor of a branch circuit shall be identified by phase or line and by nominal system voltage at all termination, connection, and splice points in accordance with 235.5(C)(1)(a) and (C)(1)(b). Different systems within the same premises that have the same nominal voltage shall be permitted to use the same identification. Means of Identification. The means of identification shall be permitted to be by separate color coding, marking tape, tagging, or other approved means.Posting of Identification Means. The method used for conductors originating within each branch-circuit panelboard or similar branch-circuit distribution equipment shall be documented in a manner that is readily available or shall be permanently posted at each branch-circuit panelboard or similar branch-circuit distribution equipment. The label shall be of sufficient durability to withstand the environment involved and shall not be handwritten.Exception: In existing installations where a voltage system(s) already exists and a different voltage system is being added, it shall be permissible to mark only the new system voltage. Existing unidentified systems shall not be required to be identified at each termination, connection, and splice point in accordance with 235.5(C)(1)(a) and (C)(1)(b). Labeling shall be required at each voltage system distribution equipment to identify that only one voltage system has been marked for a new system(s). The new system label(s) shall include the words \"other unidentified systems exist on the premises.\" [235.5_(C)_(1)](https://2023.antflix.net#235.5_(C)_(1))", + "displayTitle": "(1) Branch Circuits Supplied From More Than One Nominal Voltage System", + "children": [], + "url": "https://2023.antflix.net#235.5_(C)_(1)" + }, + { + "body": "Where a branch circuit is supplied from a dc system operating at more than 1500 volts, each ungrounded conductor of 4 AWG or larger shall be identified by polarity at all termination, connection, and splice points by marking tape, tagging, or other approved means and each ungrounded conductor of 6 AWG or smaller shall be identified by polarity at all termination, connection, and splice points in compliance with 235.5(C)(2)(a) and (C)(2)(b). The identification methods used for conductors originating within each branch-circuit panelboard or similar branch-circuit distribution equipment shall be documented in a manner that is readily available or be permanently posted at each branch-circuit panelboard or similar branch-circuit distribution equipment. Positive Polarity, Sizes 6 AWG or Smaller. Where the positive polarity of a dc system does not serve as the connection point for the grounded conductor, each positive ungrounded conductor shall be identified by one of the following means:A continuous red outer finishA continuous red stripe durably marked along the conductor's entire length on insulation of a color other than green, white, gray, or blackImprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray, or black and repeated at intervals not exceeding 610 mm (24 in.) in accordance with 310.8(B)An approved permanent marking means such as sleeving or shrink-tubing that is suitable for the conductor size, at all termination, connection, and splice points, with imprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray, or blackNegative Polarity, Sizes 6 AWG or Smaller. Where the negative polarity of a dc system does not serve as the connection point for the grounded conductor, each negative ungrounded conductor shall be identified by one of the following means:A continuous black outer finishA continuous black stripe durably marked along the conductor's entire length on insulation of a color other than green, white, gray, or redImprinted minus signs (\u2014) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red and repeated at intervals not exceeding 610 mm (24 in.) in accordance with 310.8(B)An approved permanent marking means such as sleeving or shrink-tubing that is suitable for the conductor size, at all termination, connection, and splice points, with imprinted minus signs (\u2014) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red [235.5_(C)_(2)](https://2023.antflix.net#235.5_(C)_(2))", + "displayTitle": "(2) Branch Circuits Supplied From Direct-Current Systems", + "children": [], + "url": "https://2023.antflix.net#235.5_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#235.5_(C)" + } + ], + "url": "https://2023.antflix.net#235.5" + }, + { + "body": "Circuits exceeding 1000 volts ac or 1500 volts dc, nominal, between conductors shall be permitted to supply utilization equipment in installations where conditions of maintenance and supervision ensure that only qualified persons service the installation. [235.6](https://2023.antflix.net#235.6)", + "displayTitle": "235.6 Branch-Circuit Voltage Limitations Over 1000 Volts AC or 1500 Volts DC, Nominal, Between Conductors", + "children": [], + "url": "https://2023.antflix.net#235.6" + }, + { + "body": "Branch circuits shall not be derived from autotransformers unless the circuit supplied has a grounded conductor that is electrically connected to a grounded conductor of the system supplying the autotransformer. [235.9](https://2023.antflix.net#235.9)", + "displayTitle": "235.9 Circuits Derived From Autotransformers", + "children": [], + "url": "https://2023.antflix.net#235.9" + }, + { + "body": "Two-wire dc circuits and ac circuits of two or more ungrounded conductors shall be permitted to be tapped from the ungrounded conductors of circuits that have a grounded neutral conductor. Switching devices in each tapped circuit shall have a pole in each ungrounded conductor. All poles of multipole switching devices shall manually switch together where such switching devices also serve as a disconnecting means as required by the following sections: 410.93 for double-pole switched lampholders410.104(B) for electric-discharge lamp auxiliary equipment switching devices422.31(B) for an appliance424.20 for a fixed electric space-heating unit426.51 for electric deicing and snow-melting equipment430.85 for a motor controller430.103 for a motor [235.10](https://2023.antflix.net#235.10)", + "displayTitle": "235.10 Ungrounded Conductors Tapped From Grounded Systems", + "children": [], + "url": "https://2023.antflix.net#235.10" + }, + { + "body": "The minimum number of branch circuits shall be determined from the total calculated load and the size or rating of the circuits used. In all installations, the number of circuits shall be sufficient to supply the load served. [235.11](https://2023.antflix.net#235.11)", + "displayTitle": "235.11 Branch Circuits Required", + "children": [], + "url": "https://2023.antflix.net#235.11" + }, + { + "body": "Branch circuits recognized by this article shall be rated in accordance with the maximum permitted ampere rating or setting of the overcurrent device. Where conductors of higher ampacity are used for any reason, the ampere rating or setting of the specified overcurrent device shall determine the circuit rating. [235.18](https://2023.antflix.net#235.18)", + "displayTitle": "235.18 Rating", + "children": [], + "url": "https://2023.antflix.net#235.18" + }, + { + "body": "The ampacity of conductors shall be in accordance with 310.14 and 315.60, as applicable. Branch-circuit conductors shall be sized in accordance with 235.19(A) or (B). [235.19](https://2023.antflix.net#235.19)", + "displayTitle": "235.19 Conductors - Minimum Ampacity and Size", + "children": [ + { + "body": "The ampacity of branch-circuit conductors shall not be less than 125 percent of the designed potential load of utilization equipment that will be operated simultaneously. [235.19_(A)](https://2023.antflix.net#235.19_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#235.19_(A)" + }, + { + "body": "For supervised installations, branch-circuit conductor sizing shall be permitted to be determined by qualified persons under engineering supervision. Supervised installations are defined as those portions of a facility where both of the following conditions are met: Conditions of design and installation are provided under engineering supervision.Qualified persons with documented training and experience in over 1000-volt ac or 1500-volt dc systems provide maintenance, monitoring, and servicing of the system. [235.19_(B)](https://2023.antflix.net#235.19_(B))", + "displayTitle": "(B) Supervised Installations", + "children": [], + "url": "https://2023.antflix.net#235.19_(B)" + } + ], + "url": "https://2023.antflix.net#235.19" + }, + { + "body": "Branch-circuit conductors and equipment shall be protected by overcurrent protective devices that have a rating or setting that complies with 235.20(A) through (C). [235.20](https://2023.antflix.net#235.20)", + "displayTitle": "235.20 Overcurrent Protection", + "children": [ + { + "body": "Where a branch circuit supplies continuous loads or any combination of continuous and noncontinuous loads, the rating of the overcurrent device shall not be less than the noncontinuous load plus 125 percent of the continuous load. Exception: Where the assembly, including the overcurrent devices protecting the branch circuit(s), is listed for operation at 100 percent of its rating, the ampere rating of the overcurrent device shall be permitted to be not less than the sum of the continuous load plus the noncontinuous load. [235.20_(A)](https://2023.antflix.net#235.20_(A))", + "displayTitle": "(A) Continuous and Noncontinuous Loads", + "children": [], + "url": "https://2023.antflix.net#235.20_(A)" + }, + { + "body": "Conductors shall be protected in accordance with the ampacities specified in 310.14 or 315.60, as applicable. [235.20_(B)](https://2023.antflix.net#235.20_(B))", + "displayTitle": "(B) Conductor Protection", + "children": [], + "url": "https://2023.antflix.net#235.20_(B)" + }, + { + "body": "The rating or setting of the overcurrent protective device shall not exceed that specified in the applicable articles referenced in Table 240.3 for equipment. [235.20_(C)](https://2023.antflix.net#235.20_(C))", + "displayTitle": "(C) Equipment", + "children": [], + "url": "https://2023.antflix.net#235.20_(C)" + } + ], + "url": "https://2023.antflix.net#235.20" + }, + { + "body": "An individual branch circuit shall be permitted to supply any load for which it is rated, but in no case shall the load exceed the branch-circuit ampere rating. [235.22](https://2023.antflix.net#235.22)", + "displayTitle": "235.22 Permissible Loads, Individual Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#235.22" + }, + { + "body": "A branch circuit supplying two or more outlets or receptacles shall supply only the loads specified according to its size in accordance with 210.23(A) through (E) and as summarized in 210.24, and in no case shall the load exceed the branch-circuit ampere rating. [235.23](https://2023.antflix.net#235.23)", + "displayTitle": "235.23 Permissible Loads, Multiple-Outlet Branch Circuits", + "children": [ + { + "body": "A 15- or 20-ampere branch circuit shall be permitted to supply lighting outlets, lighting units, or other utilization equipment, or any combination of them, and shall comply with 235.23(A)(1) and (A)(2). [235.23_(A)](https://2023.antflix.net#235.23_(A))", + "displayTitle": "(A) 15- And 20-Ampere Branch Circuits", + "children": [ + { + "body": "The rating of any one cord-and-plug-connected utilization equipment not fastened in place shall not exceed 80 percent of the branch-circuit ampere rating. [235.23_(A)_(1)](https://2023.antflix.net#235.23_(A)_(1))", + "displayTitle": "(1) Cord-and-Plug-Connected Equipment Not Fastened in Place", + "children": [], + "url": "https://2023.antflix.net#235.23_(A)_(1)" + }, + { + "body": "The total rating of utilization equipment fastened in place, other than luminaires, shall not exceed 50 percent of the branch-circuit ampere rating where lighting units, cord-and-plug-connected utilization equipment not fastened in place, or both, are also supplied. [235.23_(A)_(2)](https://2023.antflix.net#235.23_(A)_(2))", + "displayTitle": "(2) Utilization Equipment Fastened in Place", + "children": [], + "url": "https://2023.antflix.net#235.23_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#235.23_(A)" + }, + { + "body": "A 30-ampere branch circuit shall be permitted to supply fixed lighting units with heavy-duty lampholders in other than a dwelling unit(s) or utilization equipment in any occupancy. The rating of any one cord-and-plug-connected utilization equipment shall not exceed 80 percent of the branch-circuit ampere rating. [235.23_(B)](https://2023.antflix.net#235.23_(B))", + "displayTitle": "(B) 30-Ampere Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#235.23_(B)" + }, + { + "body": "A 40- or 50-ampere branch circuit shall be permitted to supply cooking appliances that are fastened in place in any occupancy. In other than dwelling units, such circuits shall be permitted to supply fixed lighting units with heavy-duty lampholders, infrared heating units, or other utilization equipment. [235.23_(C)](https://2023.antflix.net#235.23_(C))", + "displayTitle": "(C) 40- And 50-Ampere Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#235.23_(C)" + }, + { + "body": "Branch circuits larger than 50 amperes shall supply only nonlighting outlet loads. [235.23_(D)](https://2023.antflix.net#235.23_(D))", + "displayTitle": "(D) Branch Circuits Larger Than 50 Amperes", + "children": [], + "url": "https://2023.antflix.net#235.23_(D)" + } + ], + "url": "https://2023.antflix.net#235.23" + }, + { + "body": "A 125-volt, single-phase, 15- or 20-ampere-rated receptacle outlet shall be installed at an accessible location within 7.5 m (25 ft) of the equipment as specified in 210.63(A) and (B). Informational Note: See 210.8(E) for requirements on GFCI protection. [235.63](https://2023.antflix.net#235.63)", + "displayTitle": "235.63 Equipment Requiring Servicing", + "children": [ + { + "body": "The required receptacle outlet shall be located on the same level as the heating, air-conditioning, and refrigeration equipment. The receptacle outlet shall not be connected to the load side of the equipment's branch-circuit disconnecting means. Exception: A receptacle outlet shall not be required at one- and two-family dwellings for the service of evaporative coolers. [235.63_(A)](https://2023.antflix.net#235.63_(A))", + "displayTitle": "(A) Heating, Air-Conditioning, and Refrigeration Equipment", + "children": [], + "url": "https://2023.antflix.net#235.63_(A)" + }, + { + "body": "In other than one- and two-family dwellings, a receptacle outlet shall be located as specified in 210.63(B)(1) and (B)(2). [235.63_(B)](https://2023.antflix.net#235.63_(B))", + "displayTitle": "(B) Other Electrical Equipment", + "children": [ + { + "body": "The required receptacle outlet shall be located within the same room or area as the service equipment. [235.63_(B)_(1)](https://2023.antflix.net#235.63_(B)_(1))", + "displayTitle": "(1) Indoor Service Equipment", + "children": [], + "url": "https://2023.antflix.net#235.63_(B)_(1)" + }, + { + "body": "Where equipment, other than service equipment, requires dedicated equipment space as specified in 110.26(E), the required receptacle outlet shall be located within the same room or area as the electrical equipment and shall not be connected to the load side of the equipment's disconnecting means. [235.63_(B)_(2)](https://2023.antflix.net#235.63_(B)_(2))", + "displayTitle": "(2) Indoor Equipment Requiring Dedicated Equipment Spaces", + "children": [], + "url": "https://2023.antflix.net#235.63_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#235.63_(B)" + } + ], + "url": "https://2023.antflix.net#235.63" + }, + { + "displayTitle": "Part III Feeders", + "children": [], + "url": "https://2023.antflix.net#divider_4_III" + }, + { + "body": "Part III covers the installation requirements, overcurrent protection requirements, minimum size, and ampacity of conductors for feeders over 1000 volts ac or 1500 volts dc, nominal. [235.201](https://2023.antflix.net#235.201)", + "displayTitle": "235.201 General", + "children": [], + "url": "https://2023.antflix.net#235.201" + }, + { + "body": "The ampacity of conductors shall be in accordance with 310.14 and 315.60 as applicable. Where installed, the size of the feeder-circuit grounded conductor shall not be smaller than that required by 250.122, except that 250.122(F) shall not apply where grounded conductors are run in parallel. Feeder conductors over 1000 volts shall be sized in accordance with 235.202(A), (B), or (C). [235.202](https://2023.antflix.net#235.202)", + "displayTitle": "235.202 Minimum Rating and Size", + "children": [ + { + "body": "The ampacity of feeder conductors shall not be less than the sum of the nameplate ratings of the transformers supplied when only transformers are supplied. [235.202_(A)](https://2023.antflix.net#235.202_(A))", + "displayTitle": "(A) Feeders Supplying Transformers", + "children": [], + "url": "https://2023.antflix.net#235.202_(A)" + }, + { + "body": "The ampacity of feeders supplying a combination of transformers and utilization equipment shall not be less than the sum of the nameplate ratings of the transformers and 125 percent of the designed potential load of the utilization equipment that will be operated simultaneously. [235.202_(B)](https://2023.antflix.net#235.202_(B))", + "displayTitle": "(B) Feeders Supplying Transformers and Utilization Equipment", + "children": [], + "url": "https://2023.antflix.net#235.202_(B)" + }, + { + "body": "For supervised installations, feeder conductor sizing shall be permitted to be determined by qualified persons under engineering supervision in accordance with 310.14(B) or 315.60(B). Supervised installations are defined as those portions of a facility where all of the following conditions are met: Conditions of design and installation are provided under engineering supervision.Qualified persons with documented training and experience in over 1000-volt systems provide maintenance, monitoring, and servicing of the system. [235.202_(C)](https://2023.antflix.net#235.202_(C))", + "displayTitle": "(C) Supervised Installations", + "children": [], + "url": "https://2023.antflix.net#235.202_(C)" + } + ], + "url": "https://2023.antflix.net#235.202" + }, + { + "body": "Feeders shall be protected against overcurrent. [235.203](https://2023.antflix.net#235.203)", + "displayTitle": "235.203 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#235.203" + }, + { + "body": "If required by the authority having jurisdiction, a diagram showing feeder details shall be provided prior to the installation of the feeders. Such a diagram shall show the area in square feet of the building or other structure supplied by each feeder, the total calculated load before applying demand factors, the demand factors used, the calculated load after applying demand factors, and the size and type of conductors to be used. [235.205](https://2023.antflix.net#235.205)", + "displayTitle": "235.205 Diagrams of Feeders", + "children": [], + "url": "https://2023.antflix.net#235.205" + }, + { + "body": "Where a feeder supplies branch circuits in which equipment grounding conductors are required, the feeder shall include or provide an equipment grounding conductor, to which the equipment grounding conductors of the branch circuits shall be connected. Where the feeder supplies a separate building or structure, the requirements of 250.32 shall apply. [235.206](https://2023.antflix.net#235.206)", + "displayTitle": "235.206 Feeder Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#235.206" + }, + { + "displayTitle": "235.212 Identification for Feeders", + "children": [ + { + "body": "The grounded conductor of a feeder, if insulated, shall be identified in accordance with 200.6. [235.212_(A)](https://2023.antflix.net#235.212_(A))", + "displayTitle": "(A) Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#235.212_(A)" + }, + { + "body": "The equipment grounding conductor shall be identified in accordance with 250.119. [235.212_(B)](https://2023.antflix.net#235.212_(B))", + "displayTitle": "(B) Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#235.212_(B)" + }, + { + "body": "Ungrounded conductors shall be identified in accordance with 235.212(C)(1) or (C)(2), as applicable. [235.212_(C)](https://2023.antflix.net#235.212_(C))", + "displayTitle": "(C) Identification of Ungrounded Conductors", + "children": [ + { + "body": "Where the premises wiring system has feeders supplied from more than one nominal voltage system, each ungrounded conductor of a feeder shall be identified by phase or line and system at all termination, connection, and splice points in compliance with 235.212(C)(1)(a) and (C)(1)(b). Means of Identification. The means of identification shall be permitted to be by separate color coding, marking tape, tagging, or other approved means.Posting of Identification Means. The method utilized for conductors originating within each feeder panelboard or similar feeder distribution equipment shall be documented in a manner that is readily available or shall be permanently posted at each feeder panelboard or similar feeder distribution equipment. [235.212_(C)_(1)](https://2023.antflix.net#235.212_(C)_(1))", + "displayTitle": "(1) Feeders Supplied From More Than One Nominal Voltage System", + "children": [], + "url": "https://2023.antflix.net#235.212_(C)_(1)" + }, + { + "body": "Where a feeder is supplied from a dc system operating at more than 1500 volts, each ungrounded conductor of 4 AWG or larger shall be identified by polarity at all termination, connection, and splice points by marking tape, tagging, or other approved means; each ungrounded conductor of 6 AWG or smaller shall be identified by polarity at all termination, connection, and splice points in compliance with 235.212(C)(2)(a) and (C)(2)(b). The identification methods utilized for conductors originating within each feeder panelboard or similar feeder distribution equipment shall be documented in a manner that is readily available or shall be permanently posted at each feeder panelboard or similar feeder distribution equipment. Positive Polarity, Sizes 6 AWG or Smaller. Where the positive polarity of a dc system does not serve as the connection for the grounded conductor, each positive ungrounded conductor shall be identified by one of the following means:A continuous red outer finishA continuous red stripe durably marked along the conductor's entire length on insulation of a color other than green, white, gray, or blackImprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray, or black, and repeated at intervals not exceeding 610 mm (24 in.) in accordance with 310.8(B)An approved permanent marking means such as sleeving or shrink-tubing that is suitable for the conductor size, at all termination, connection, and splice points, with imprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray, or blackNegative Polarity, Sizes 6 AWG or Smaller. Where the negative polarity of a dc system does not serve as the connection for the grounded conductor, each negative ungrounded conductor shall be identified by one of the following means:A continuous black outer finishA continuous black stripe durably marked along the conductor's entire length on insulation of a color other than green, white, gray, or redImprinted minus signs (\u2014) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red, and repeated at intervals not exceeding 610 mm (24 in.) in accordance with 310.8(B)An approved permanent marking means such as sleeving or shrink-tubing that is suitable for the conductor size, at all termination, connection, and splice points, with imprinted minus signs (\u2014) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red [235.212_(C)_(2)](https://2023.antflix.net#235.212_(C)_(2))", + "displayTitle": "(2) Feeders Supplied From Direct-Current Systems", + "children": [], + "url": "https://2023.antflix.net#235.212_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#235.212_(C)" + } + ], + "url": "https://2023.antflix.net#235.212" + }, + { + "displayTitle": "Part IV Outside Branch Circuits and Feeders", + "children": [], + "url": "https://2023.antflix.net#divider_3_IV" + }, + { + "body": "Part IV covers requirements for outside branch circuits and feeders over 1000 volts ac or 1500 volts dc, nominal, that are run on or between buildings, structures, or poles on the premises; and electrical equipment and wiring for the supply of utilization equipment that is located on or attached to the outside of buildings, structures, or poles. Outside branch circuits and feeders over 1000 volts ac or 1500 volts dc, nominal, shall comply with the applicable requirements in Parts I and II of Article 225 and with Part IV of this article, which supplements or modifies those requirements. [235.301](https://2023.antflix.net#235.301)", + "displayTitle": "235.301 General", + "children": [], + "url": "https://2023.antflix.net#235.301" + }, + { + "body": "For overhead spans, open individual conductors shall not be smaller than 6 AWG copper or 4 AWG aluminum where open individual conductors and 8 AWG copper or 6 AWG aluminum where in cable. [235.306](https://2023.antflix.net#235.306)", + "displayTitle": "235.306 Conductor Size and Support", + "children": [], + "url": "https://2023.antflix.net#235.306" + }, + { + "body": "The installation of outside wiring on surfaces of buildings (or other structures) shall be installed as provided in 305.3. [235.310](https://2023.antflix.net#235.310)", + "displayTitle": "235.310 Wiring on Buildings (or Other Structures)", + "children": [], + "url": "https://2023.antflix.net#235.310" + }, + { + "body": "Conductors shall comply with the spacings provided in 110.36 and 495.24. [235.314](https://2023.antflix.net#235.314)", + "displayTitle": "235.314 Open-Conductor Spacings", + "children": [], + "url": "https://2023.antflix.net#235.314" + }, + { + "body": "The feeder or branch-circuit disconnecting means shall have a rating of not less than the calculated load to be supplied, determined in accordance with Parts I and II of Article 220 for branch circuits, Part III or IV of Article 220 for feeders, or Part V of Article 220 for farm loads. [235.339](https://2023.antflix.net#235.339)", + "displayTitle": "235.339 Rating of Disconnect", + "children": [], + "url": "https://2023.antflix.net#235.339" + }, + { + "body": "The sizing of conductors over 1000 volts shall be in accordance with 235.19(A) for branch circuits and 235.19(B) for feeders. [235.350](https://2023.antflix.net#235.350)", + "displayTitle": "235.350 Sizing of Conductors", + "children": [], + "url": "https://2023.antflix.net#235.350" + }, + { + "body": "Where oil switches or air, oil, vacuum, or sulfur hexafluoride circuit breakers constitute a building disconnecting means, an isolating switch with visible break contacts and meeting the requirements of 235.404(B), (C), and (D) shall be installed on the supply side of the disconnecting means and all associated equipment. Exception: The isolating switch shall not be required where the disconnecting means is mounted on removable truck panels or switchgear units that cannot be opened unless the circuit is disconnected and that, when removed from the normal operating position, automatically disconnect the circuit breaker or switch from all energized parts. [235.351](https://2023.antflix.net#235.351)", + "displayTitle": "235.351 Isolating Switches", + "children": [], + "url": "https://2023.antflix.net#235.351" + }, + { + "displayTitle": "235.352 Disconnecting Means", + "children": [ + { + "body": "A building or structure disconnecting means shall be located in accordance with 225.31 (B), or, if not readily accessible, it shall be operable by mechanical linkage from a readily accessible point. For multibuilding industrial installations under single management, it shall be permitted to be electrically operated by a readily accessible, remote-control device in a separate building or structure. [235.352_(A)](https://2023.antflix.net#235.352_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#235.352_(A)" + }, + { + "body": "Each building or structure disconnect shall simultaneously disconnect all ungrounded supply conductors it controls and shall have a fault-closing rating not less than the available fault current at its supply terminals. Exception: Where the individual disconnecting means consists of fused cutouts, the simultaneous disconnection of all ungrounded supply conductors shall not be required if there is a means to disconnect the load before opening the cutouts. A permanent legible sign shall be installed adjacent to the fused cutouts and shall read DISCONNECT LOAD BEFORE OPENING CUTOUTS. Where fused switches or separately mounted fuses are installed, the fuse characteristics shall be permitted to contribute to the fault-closing rating of the disconnecting means. [235.352_(B)](https://2023.antflix.net#235.352_(B))", + "displayTitle": "(B) Type", + "children": [], + "url": "https://2023.antflix.net#235.352_(B)" + }, + { + "body": "Disconnecting means shall be lockable open in accordance with 110.25. Exception: Where an individual disconnecting means consists of fused cutouts, a suitable enclosure capable of being locked and sized to contain all cutout fuse holders shall be installed at a convenient location to the fused cutouts. [235.352_(C)](https://2023.antflix.net#235.352_(C))", + "displayTitle": "(C) Locking", + "children": [], + "url": "https://2023.antflix.net#235.352_(C)" + }, + { + "body": "Disconnecting means shall clearly indicate whether they are in the open \"off\" or closed \"on\" position. [235.352_(D)](https://2023.antflix.net#235.352_(D))", + "displayTitle": "(D) Indicating", + "children": [], + "url": "https://2023.antflix.net#235.352_(D)" + }, + { + "body": "Where disconnecting means handles are operated vertically, the \"up\" position of the handle shall be the \"on\" position. Exception: A switching device having more than one \"on\" position, such as a double throw switch, shall not be required to comply with this requirement. [235.352_(E)](https://2023.antflix.net#235.352_(E))", + "displayTitle": "(E) Uniform Position", + "children": [], + "url": "https://2023.antflix.net#235.352_(E)" + }, + { + "body": "Where a building or structure has any combination of feeders, branch circuits, or services passing through or supplying it, a permanent plaque or directory shall be installed at each feeder and branch-circuit disconnect location that denotes all other services, feeders, or branch circuits supplying that building or structure or passing through that building or structure and the area served by each. [235.352_(F)](https://2023.antflix.net#235.352_(F))", + "displayTitle": "(F) Identification", + "children": [], + "url": "https://2023.antflix.net#235.352_(F)" + } + ], + "url": "https://2023.antflix.net#235.352" + }, + { + "displayTitle": "235.356 Inspections and Tests", + "children": [ + { + "body": "The complete electrical system design, including settings for protective, switching, and control circuits, shall be prepared in advance and made available on request to the authority having jurisdiction and shall be performance tested when first installed on-site. Each protective, switching, and control circuit shall be adjusted in accordance with the system design and tested by actual operation using current injection or equivalent methods as necessary to ensure that each and every such circuit operates correctly to the satisfaction of the authority having jurisdiction. [235.356_(A)](https://2023.antflix.net#235.356_(A))", + "displayTitle": "(A) Pre-Energization and Operating Tests", + "children": [ + { + "body": "All instrument transformers shall be tested to verify correct polarity and burden. [235.356_(A)_(1)](https://2023.antflix.net#235.356_(A)_(1))", + "displayTitle": "(1) Instrument Transformers", + "children": [], + "url": "https://2023.antflix.net#235.356_(A)_(1)" + }, + { + "body": "Each protective relay shall be demonstrated to operate by injecting current or voltage, or both, at the associated instrument transformer output terminal and observing that the associated switching and signaling functions occur correctly and in proper time and sequence to accomplish the protective function intended. [235.356_(A)_(2)](https://2023.antflix.net#235.356_(A)_(2))", + "displayTitle": "(2) Protective Relays", + "children": [], + "url": "https://2023.antflix.net#235.356_(A)_(2)" + }, + { + "body": "Each switching circuit shall be observed to operate the associated equipment being switched. [235.356_(A)_(3)](https://2023.antflix.net#235.356_(A)_(3))", + "displayTitle": "(3) Switching Circuits", + "children": [], + "url": "https://2023.antflix.net#235.356_(A)_(3)" + }, + { + "body": "Each control or signal circuit shall be observed to perform its proper control function or produce a correct signal output. [235.356_(A)_(4)](https://2023.antflix.net#235.356_(A)_(4))", + "displayTitle": "(4) Control and Signal Circuits", + "children": [], + "url": "https://2023.antflix.net#235.356_(A)_(4)" + }, + { + "body": "All metering circuits shall be verified to operate correctly from voltage and current sources in a similar manner to protective relay circuits. [235.356_(A)_(5)](https://2023.antflix.net#235.356_(A)_(5))", + "displayTitle": "(5) Metering Circuits", + "children": [], + "url": "https://2023.antflix.net#235.356_(A)_(5)" + }, + { + "body": "Complete acceptance tests shall be performed, after the substation installation is completed, on all assemblies, equipment, conductors, and control and protective systems, as applicable, to verify the integrity of all the systems. [235.356_(A)_(6)](https://2023.antflix.net#235.356_(A)_(6))", + "displayTitle": "(6) Acceptance Tests", + "children": [], + "url": "https://2023.antflix.net#235.356_(A)_(6)" + }, + { + "body": "All relays and metering that use phase differences for operation shall be verified by measuring phase angles at the relay under actual load conditions after operation commences. [235.356_(A)_(7)](https://2023.antflix.net#235.356_(A)_(7))", + "displayTitle": "(7) Relays and Metering Utilizing Phase Differences", + "children": [], + "url": "https://2023.antflix.net#235.356_(A)_(7)" + } + ], + "url": "https://2023.antflix.net#235.356_(A)" + }, + { + "body": "A test report covering the results of the tests required in 235.356(A) shall be delivered to the authority having jurisdiction prior to energization. Informational Note: See ANSI/NETA ATS, Acceptance Testing Specifications for Electrical Power Distribution Equipment and Systems, for an example of acceptance specifications. [235.356_(B)](https://2023.antflix.net#235.356_(B))", + "displayTitle": "(B) Test Report", + "children": [], + "url": "https://2023.antflix.net#235.356_(B)" + } + ], + "url": "https://2023.antflix.net#235.356" + }, + { + "displayTitle": "235.360 Clearances Over Roadways, Walkways. Rail, Water, and Open Land", + "children": [ + { + "body": "The clearances over roadways, walkways, rail, water, and open land for conductors and live parts up to 22 kV or less to ground shall be not less than the values shown in Table 235.360(A).Table 235.360(A) Clearances over Roadways, Walkways, Rail, Water, and Open Land Location Clearance m ft Open land subject to vehicles, cultivation, or grazing 5.6 18.5 Roadways, driveways, parking lots, and alleys 5.6 18.5 Walkways 4.1 13.5 Rails 8.1 26.5 Spaces and ways for pedestrians and restricted traffic 4.4 14.5 Water areas not suitable for boating 5.2 17.0 [235.360_(A)](https://2023.antflix.net#235.360_(A))", + "displayTitle": "(A) 22 kV or Less to Ground", + "children": [], + "url": "https://2023.antflix.net#235.360_(A)" + }, + { + "body": "Clearances for the categories shown in Table 235.360(A) shall be increased by 10 mm (0.4 in.) per kV, or major fraction thereof, more than 22 kV. [235.360_(B)](https://2023.antflix.net#235.360_(B))", + "displayTitle": "(B) More Than 22 kV to Ground", + "children": [], + "url": "https://2023.antflix.net#235.360_(B)" + }, + { + "body": "For special cases, such as where crossings will be made over lakes, rivers, or areas using large vehicles such as mining operations, specific designs shall be engineered considering the special circumstances and shall be approved by the authority having jurisdiction. Informational Note: See ANSI/IEEE C2-2017, National Electrical Safety Code, for additional information. [235.360_(C)](https://2023.antflix.net#235.360_(C))", + "displayTitle": "(C) Special Cases", + "children": [], + "url": "https://2023.antflix.net#235.360_(C)" + } + ], + "url": "https://2023.antflix.net#235.360" + }, + { + "displayTitle": "235.361 Clearances Over Buildings and Other Structures", + "children": [ + { + "body": "The clearances over buildings and other structures for conductors and live parts up to 22 kV or less to ground shall be not less than the values shown in Table 235.361 (A).Table 235.361(A) Clearances over Buildings and Other Structures Clearance from Conductors or Live Parts from: Horizontal Vertical m ft m ft Building walls, projections, and windows 2.3 7.5 - - Balconies, catwalks, and similar areas accessible to people 2.3 7.5 4.1 13.5 Over or under roofs or projections not readily accessible to people - - 3.8 12.5 \n\n\n Over roofs accessible to vehicles but not trucks \n\n- \n\n- 4.1 13.5 \n\n Over roofs accessible to trucks \n\n- - 5.6 18.5 \n\nOther structures 2.3 7.5 - - [235.361_(A)](https://2023.antflix.net#235.361_(A))", + "displayTitle": "(A) 22 kV or Less to Ground", + "children": [], + "url": "https://2023.antflix.net#235.361_(A)" + }, + { + "body": "Clearances for the categories shown in Table 235.361(A) shall be increased by 10 mm (0.4 in.) per kV, or major fraction thereof, more than 22 kV. Informational Note: See ANSI/IEEE C2-2017, National Electrical Safety Code, for additional information. [235.361_(B)](https://2023.antflix.net#235.361_(B))", + "displayTitle": "(B) More Than 22 kV to Ground", + "children": [], + "url": "https://2023.antflix.net#235.361_(B)" + } + ], + "url": "https://2023.antflix.net#235.361" + }, + { + "displayTitle": "Part V Services", + "children": [], + "url": "https://2023.antflix.net#divider_3_V" + }, + { + "body": "Part V covers requirements for service conductors and equipment used on circuits over 1000 volts ac and 1500 volts dc, nominal, shall comply with all of the applicable requirements in Parts I through VII of Article 230 and with Part V of this article, which supplements or modifies those requirements. In no case shall the provisions of Part V apply to equipment on the supply side of the service point. [235.401](https://2023.antflix.net#235.401)", + "displayTitle": "235.401 General", + "children": [], + "url": "https://2023.antflix.net#235.401" + }, + { + "body": "Service-entrance conductors to buildings or enclosures shall be installed to conform to 235.402(A) and (B). [235.402](https://2023.antflix.net#235.402)", + "displayTitle": "235.402 Service-Entrance Conductors", + "children": [ + { + "body": "Service-entrance conductors shall not be smaller than 6 AWG unless in multiconductor cable. Multiconductor cable shall not be smaller than 8 AWG. [235.402_(A)](https://2023.antflix.net#235.402_(A))", + "displayTitle": "(A) Conductor Size", + "children": [], + "url": "https://2023.antflix.net#235.402_(A)" + }, + { + "body": "Service-entrance conductors shall be installed by one of the wiring methods covered in 305.3 and 305.15. [235.402_(B)](https://2023.antflix.net#235.402_(B))", + "displayTitle": "(B) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#235.402_(B)" + } + ], + "url": "https://2023.antflix.net#235.402" + }, + { + "displayTitle": "235.404 Isolating Switches", + "children": [ + { + "body": "Where oil switches or air, oil, vacuum, or sulfur hexafluoride circuit breakers constitute the service disconnecting means, an isolating switch with visible break contacts shall be installed on the supply side of the disconnecting means and all associated service equipment. Exception: An isolating switch shall not be required where the circuit breaker or switch is mounted on removable truck panels or switchgear units where both of the following conditions apply: (1) Cannot be opened unless the circuit is disconnected (2) Where all energized parts are automatically disconnected when the circuit breaker or switch is removed from the normal operating position [235.404_(A)](https://2023.antflix.net#235.404_(A))", + "displayTitle": "(A) Where Required", + "children": [], + "url": "https://2023.antflix.net#235.404_(A)" + }, + { + "body": "Where fuses are of the type that can be operated as a disconnecting switch, a set of such fuses shall be permitted as the isolating switch. [235.404_(B)](https://2023.antflix.net#235.404_(B))", + "displayTitle": "(B) Fuses as Isolating Switch", + "children": [], + "url": "https://2023.antflix.net#235.404_(B)" + }, + { + "body": "The isolating switch shall be accessible to qualified persons only. [235.404_(C)](https://2023.antflix.net#235.404_(C))", + "displayTitle": "(C) Accessible to Qualified Persons Only", + "children": [], + "url": "https://2023.antflix.net#235.404_(C)" + }, + { + "body": "Isolating switches shall be provided with a means for readily connecting the load side conductors to a grounding electrode system, equipment ground busbar, or grounded steel structure when disconnected from the source of supply. A means for grounding the load side conductors to a grounding electrode system, equipment grounding busbar, or grounded structural steel shall not be required for any duplicate isolating switch installed and maintained by the electric supply company. [235.404_(D)](https://2023.antflix.net#235.404_(D))", + "displayTitle": "(D) Connection to Ground", + "children": [], + "url": "https://2023.antflix.net#235.404_(D)" + } + ], + "url": "https://2023.antflix.net#235.404" + }, + { + "displayTitle": "235.405 Disconnecting Means", + "children": [ + { + "body": "The service disconnecting means shall be located in accordance with 230.70. For either overhead or underground primary distribution systems on private property, the service disconnect shall be permitted to be located in a location that is not readily accessible, if the disconnecting means can be operated by mechanical linkage from a readily accessible point, or electronically in accordance with 235.405(C), where applicable. [235.405_(A)](https://2023.antflix.net#235.405_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#235.405_(A)" + }, + { + "body": "Each service disconnect shall simultaneously disconnect all ungrounded service conductors that it controls and shall have a fault-closing rating that is not less than the available fault current at its supply terminals. Where fused switches or separately mounted fuses are installed, the fuse characteristics shall be permitted to contribute to the fault-closing rating of the disconnecting means. [235.405_(B)](https://2023.antflix.net#235.405_(B))", + "displayTitle": "(B) Type", + "children": [], + "url": "https://2023.antflix.net#235.405_(B)" + }, + { + "body": "For multibuilding, industrial installations under single management, the service disconnecting means shall be permitted to be located at a separate building or structure. In such cases, the service disconnecting means shall be permitted to be electrically operated by a readily accessible, remote-control device. [235.405_(C)](https://2023.antflix.net#235.405_(C))", + "displayTitle": "(C) Remote Control", + "children": [], + "url": "https://2023.antflix.net#235.405_(C)" + } + ], + "url": "https://2023.antflix.net#235.405" + }, + { + "body": "Where the circuit breaker or alternative for it, as specified in 235.408 for service overcurrent devices, meets the requirements specified in 235.405, it shall constitute the service disconnecting means. [235.406](https://2023.antflix.net#235.406)", + "displayTitle": "235.406 Overcurrent Devices as Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#235.406" + }, + { + "body": "A short-circuit protective device shall be provided on the load side of, or as an integral part of, the service disconnect, and shall protect all ungrounded conductors that it supplies. The protective device shall be capable of detecting and interrupting all values of current, in excess of its trip setting or melting point, that can occur at its location. A fuse rated in continuous amperes not to exceed three times the ampacity of the conductor, or a circuit breaker with a trip setting of not more than six times the ampacity of the conductors, shall be considered as providing the required short-circuit protection. Informational Note: See Table 315.60(C)(1) through Table 315.60(C)(20) for ampacities of conductors rated 2001 volts to 35,000 volts. Overcurrent devices shall conform to 235.408(A) and (B). [235.408](https://2023.antflix.net#235.408)", + "displayTitle": "235.408 Protection Requirements", + "children": [ + { + "body": "Equipment used to protect service-entrance conductors shall meet the requirements of Article 495, Part II. [235.408_(A)](https://2023.antflix.net#235.408_(A))", + "displayTitle": "(A) Equipment Type", + "children": [], + "url": "https://2023.antflix.net#235.408_(A)" + }, + { + "body": "The restriction to 80 percent of the rating for an enclosed overcurrent device for continuous loads shall not apply to overcurrent devices installed in systems operating at over 1000 volts. [235.408_(B)](https://2023.antflix.net#235.408_(B))", + "displayTitle": "(B) Enclosed Overcurrent Devices", + "children": [], + "url": "https://2023.antflix.net#235.408_(B)" + } + ], + "url": "https://2023.antflix.net#235.408" + }, + { + "body": "Surge arresters installed in accordance with the requirements of Parts II and III of Article 242 shall be permitted on each ungrounded overhead service conductor. Informational Note: Surge arresters may be referred to as lightning arresters in older documents. [235.409](https://2023.antflix.net#235.409)", + "displayTitle": "235.409 Surge Arresters", + "children": [], + "url": "https://2023.antflix.net#235.409" + }, + { + "body": "Service equipment, including instrument transformers, shall conform to Part I of Article 495. [235.410](https://2023.antflix.net#235.410)", + "displayTitle": "235.410 Service Equipment - General", + "children": [], + "url": "https://2023.antflix.net#235.410" + }, + { + "body": "Switchgear shall consist of a substantial metal structure and a sheet metal enclosure. Where installed over a combustible floor, suitable protection thereto shall be provided. [235.411](https://2023.antflix.net#235.411)", + "displayTitle": "235.411 Switchgear", + "children": [], + "url": "https://2023.antflix.net#235.411" + }, + { + "body": "Where the voltage exceeds 35,000 volts between conductors that enter a building, they shall terminate in a switchgear compartment or a vault conforming to the requirements of 450.41 through 450.48. [235.412](https://2023.antflix.net#235.412)", + "displayTitle": "235.412 Over 35,000 Volts", + "children": [], + "url": "https://2023.antflix.net#235.412" + } + ], + "url": "https://2023.antflix.net#235" + }, + { + "displayTitle": "Article 240 Overcurrent Protection", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_6_I" + }, + { + "body": "Parts I through VII of this article provide the general requirements for overcurrent protection and overcurrent protective devices not more than 1000 volts, nominal. Part VIII covers overcurrent protection for those portions of supervised industrial installations operating at voltages of not more than 1000 volts, nominal. Informational Note No. 1: Overcurrent protection for conductors and equipment is provided to open the circuit if the current reaches a value that will cause an excessive or dangerous temperature in conductors or conductor insulation. Informational Note No. 2: See 110.9 for requirements for interrupting ratings and 110.10 for requirements for protection against fault currents. [240.1](https://2023.antflix.net#240.1)", + "displayTitle": "240.1 Scope", + "children": [], + "url": "https://2023.antflix.net#240.1" + }, + { + "displayTitle": "240.2 Reconditioned Equipment", + "children": [ + { + "body": "The following equipment shall not be reconditioned: Equipment providing ground-fault protection of equipmentGround-fault circuit interruptersLow-voltage fuseholders and low-voltage nonrenewable fusesMolded-case circuit breakersLow-voltage power circuit breaker electronic trip units. [240.2_(A)](https://2023.antflix.net#240.2_(A))", + "displayTitle": "(A) Reconditioning Not Permitted", + "children": [], + "url": "https://2023.antflix.net#240.2_(A)" + }, + { + "body": "The following equipment shall be permitted to be reconditioned: Low-voltage power circuit breakersElectromechanical protective relays and current transformersReconditioned equipment shall be listed as reconditioned and comply with 110.21(A)(2). [240.2_(B)](https://2023.antflix.net#240.2_(B))", + "displayTitle": "(B) Reconditioning Permitted", + "children": [], + "url": "https://2023.antflix.net#240.2_(B)" + } + ], + "url": "https://2023.antflix.net#240.2" + }, + { + "body": "Equipment shall be protected against overcurrent in accordance with the article in this Code that covers the type of equipment specified in Table 240.3. Table 240.3 Other Articles Equipment Article Air-conditioning and refrigerating equipment 440 Appliances 422 Assembly occupancies 518 Audio signal processing, amplification, and reproduction equipment 640 Branch circuits 210 Busways 368 Capacitors 460 Class 1 power-limited circuits and Class 1 power-limited remote-control and signaling circuits 724 Class 2 and Class 3 remote-control, signaling, and power-limited circuits 725 Cranes and hoists 610 Electric signs and outline lighting 600 Electric welders 630 Electrolytic cells 668 Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chairlifts 620 Emergency systems 700 Fire alarm systems 760 Fire pumps 695 Fixed electric heating equipment for pipelines and vessels 427 Fixed electric space-heating equipment 424 Fixed outdoor electric deicing and snow-melting equipment 426 Generators 445 Health care facilities 517 Induction and dielectric heating equipment 665 Industrial machinery 670 Luminaires, lampholders, and lamps 410 Motion picture and television studios and similar locations 530 Motors, motor circuits, and controllers 430 Phase converters 455 Pipe organs 650 Receptacles 406 Services 230 Solar photovoltaic systems 690 Switchboards, switchgear, and panelboards 408 Theaters, audience areas of motion picture and television studios, and similar locations 520 Transformers and transformer vaults 450 X-ray equipment 660 [240.3](https://2023.antflix.net#240.3)", + "displayTitle": "240.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#240.3" + }, + { + "body": "Conductors, other than flexible cords, flexible cables, and fixture wires, shall be protected against overcurrent in accordance with their ampacities specified in 310.14, unless otherwise permitted or required in 240.4(A) through (H). Informational Note: See ICEA P-32-382-2018, Short Circuit Characteristics of Insulated Cables, for information on allowable short-circuit currents for insulated copper and aluminum conductors. [240.4](https://2023.antflix.net#240.4)", + "displayTitle": "240.4 Protection of Conductors", + "children": [ + { + "body": "Conductor overload protection shall not be required where the interruption of the circuit would create a hazard, such as in a material-handling magnet circuit or fire pump circuit. Short-circuit protection shall be provided. Informational Note: See NFPA 20-2019, Standard for the Installation of Stationary Pumps for Fire Protection. [240.4_(A)](https://2023.antflix.net#240.4_(A))", + "displayTitle": "(A) Power Loss Hazard", + "children": [], + "url": "https://2023.antflix.net#240.4_(A)" + }, + { + "body": "The next higher standard overcurrent device rating (above the ampacity of the conductors being protected) shall be permitted to be used, provided all of the following conditions are met: The conductors being protected are not part of a branch circuit supplying more than one receptacle for cord-and-plug-connected portable loads.The ampacity of the conductors does not correspond with the standard ampere rating of a fuse or a circuit breaker without overload trip adjustments above its rating (but that shall be permitted to have other trip or rating adjustments).The next higher standard rating selected does not exceed 800 amperes.If the overcurrent protective device is an adjustable trip device installed in accordance with 240.4(B)(1), (B)(2), and (B)(3), it shall be permitted to be set to a value that does not exceed the next higher standard value above the ampacity of the conductors being protected as shown in Table 240.6(A) where restricted access in accordance with 240.6(C) is provided. [240.4_(B)](https://2023.antflix.net#240.4_(B))", + "displayTitle": "(B) Overcurrent Devices Rated 800 Amperes or Less", + "children": [], + "url": "https://2023.antflix.net#240.4_(B)" + }, + { + "body": "Where the overcurrent device is rated over 800 amperes, the ampacity of the conductors it protects shall be equal to or greater than the rating of the overcurrent device defined in 240.6. [240.4_(C)](https://2023.antflix.net#240.4_(C))", + "displayTitle": "(C) Overcurrent Devices Rated Over 800 Amperes", + "children": [], + "url": "https://2023.antflix.net#240.4_(C)" + }, + { + "body": "Unless specifically permitted in 240.4(E) or (G), the overcurrent protection shall not exceed that required by 240.4(D)(1) through (D)(8) after any correction factors for ambient temperature and number of conductors have been applied. [240.4_(D)](https://2023.antflix.net#240.4_(D))", + "displayTitle": "(D) Small Conductors", + "children": [ + { + "body": "7 amperes, provided all the following conditions are met: Continuous loads do not exceed 5.6 amperes.Overcurrent protection is provided by one of the following:Branch-circuit-rated circuit breakers listed and marked for use with 18 AWG copper conductorBranch-circuit-rated fuses listed and marked for use with 18 AWG copper conductorClass CC, Class CF, Class J, or Class T fuses [240.4_(D)_(1)](https://2023.antflix.net#240.4_(D)_(1))", + "displayTitle": "(1) 18 AWG Copper", + "children": [], + "url": "https://2023.antflix.net#240.4_(D)_(1)" + }, + { + "body": "10 amperes, provided all the following conditions are met: Continuous loads do not exceed 8 amperes.Overcurrent protection is provided by one of the following:Branch-circuit-rated circuit breakers listed and marked for use with 16 AWG copper conductorBranch-circuit-rated fuses listed and marked for use with 16 AWG copper conductorClass CC, Class CF, Class J, or Class T fuses [240.4_(D)_(2)](https://2023.antflix.net#240.4_(D)_(2))", + "displayTitle": "(2) 16 AWG Copper", + "children": [], + "url": "https://2023.antflix.net#240.4_(D)_(2)" + }, + { + "body": "10 amperes, provided all the following conditions are met: Continuous loads do not exceed 8 amperesOvercurrent protection is provided by one of the following:Branch-circuit-rated circuit breakers are listed and marked for use with 14 AWG copper-clad aluminum conductor.Branch-circuit-rated fuses are listed and marked for use with 14 AWG copper-clad aluminum conductor. [240.4_(D)_(3)](https://2023.antflix.net#240.4_(D)_(3))", + "displayTitle": "(3) 14 AWG Copper-Clad Aluminum", + "children": [], + "url": "https://2023.antflix.net#240.4_(D)_(3)" + }, + { + "body": "15 amperes [240.4_(D)_(4)](https://2023.antflix.net#240.4_(D)_(4))", + "displayTitle": "(4) 14 AWG Copper", + "children": [], + "url": "https://2023.antflix.net#240.4_(D)_(4)" + }, + { + "body": "15 amperes [240.4_(D)_(5)](https://2023.antflix.net#240.4_(D)_(5))", + "displayTitle": "(5) 12 AWG Aluminum and Copper-Clad Aluminum", + "children": [], + "url": "https://2023.antflix.net#240.4_(D)_(5)" + }, + { + "body": "20 amperes [240.4_(D)_(6)](https://2023.antflix.net#240.4_(D)_(6))", + "displayTitle": "(6) 12 AWG Copper", + "children": [], + "url": "https://2023.antflix.net#240.4_(D)_(6)" + }, + { + "body": "25 amperes [240.4_(D)_(7)](https://2023.antflix.net#240.4_(D)_(7))", + "displayTitle": "(7) 10 AWG Aluminum and Copper-Clad Aluminum", + "children": [], + "url": "https://2023.antflix.net#240.4_(D)_(7)" + }, + { + "body": "30 amperes [240.4_(D)_(8)](https://2023.antflix.net#240.4_(D)_(8))", + "displayTitle": "(8) 10 AWG Copper", + "children": [], + "url": "https://2023.antflix.net#240.4_(D)_(8)" + } + ], + "url": "https://2023.antflix.net#240.4_(D)" + }, + { + "body": "Tap conductors shall be permitted to be protected against overcurrent in accordance with the following: 210.19(C) and (D), Household Ranges and Cooking Appliances and Other Loads240.5(B)(2), Fixture Wire240.21, Location in Circuit368.17(B), Reduction in Ampacity Size of Busway368.17(C), Feeder or Branch Circuits (busway taps)430.53(D), Single Motor Taps [240.4_(E)](https://2023.antflix.net#240.4_(E))", + "displayTitle": "(E) Tap Conductors", + "children": [], + "url": "https://2023.antflix.net#240.4_(E)" + }, + { + "body": "Single-phase (other than 2-wire) and multiphase (other than delta-delta, 3-wire) transformer secondary conductors shall not be considered to be protected by the primary overcurrent protective device. Conductors supplied by the secondary side of a single-phase transformer having a 2-wire (single-voltage) secondary, or a three-phase, delta-delta connected transformer having a 3-wire (single-voltage) secondary, shall be permitted to be protected by overcurrent protection provided on the primary (supply) side of the transformer, provided this protection is in accordance with 450.3 and does not exceed the value determined by multiplying the secondary conductor ampacity by the secondary-to-primary transformer voltage ratio. [240.4_(F)](https://2023.antflix.net#240.4_(F))", + "displayTitle": "(F) Transformer Secondary Conductors", + "children": [], + "url": "https://2023.antflix.net#240.4_(F)" + }, + { + "body": "Overcurrent protection for the specific conductors shall be permitted to be provided as referenced in Table 240.4(G).Table 240.4(G) Specific Conductor Applications Conductor Article Section Air-conditioning and refrigeration equipment circuit conductors 440, Parts III, IV, VI Capacitor circuit conductors 460 460.8(B) and 460.25 Control and instrumentation circuit conductors (Type ITC) 335 335.9 Electric welder circuit conductors 630 630.12 and 630.32 Fire alarm system circuit conductors 760 760.43, 760.45, 760.121, and Chapter 9, Tables 12(A) and 12(B) Motor-operated appliance circuit conductors 422, Part II Motor and motor-control circuit conductors 430, Parts II, III, IV, V, VI, VII Phase converter supply conductors 455 455.7 \n\n\nRemote-control, signaling, and power-limited circuit conductors 725 724.43, 724.45, 725.60, and Chapter 9, Tables 11 (A) and 11(B) Secondary tie conductors 450 450.6 [240.4_(G)](https://2023.antflix.net#240.4_(G))", + "displayTitle": "(G) Overcurrent Protection for Specific Conductor Applications", + "children": [], + "url": "https://2023.antflix.net#240.4_(G)" + }, + { + "body": "Dwelling unit service and feeder conductors shall be permitted to be protected against overcurrent at the ampacity values in 310.12. [240.4_(H)](https://2023.antflix.net#240.4_(H))", + "displayTitle": "(H) Dwelling Unit Service and Feeder Conductors", + "children": [], + "url": "https://2023.antflix.net#240.4_(H)" + } + ], + "url": "https://2023.antflix.net#240.4" + }, + { + "body": "Flexible cord and flexible cable, including tinsel cord and extension cords, and fixture wires shall be protected against overcurrent by either 240.5(A) or (B). [240.5](https://2023.antflix.net#240.5)", + "displayTitle": "240.5 Protection of Flexible Cords, Flexible Cables, and Fixture Wires", + "children": [ + { + "body": "Flexible cord and flexible cable shall be protected by an overcurrent device in accordance with their ampacity as specified in Table 400.5(A)(1) and Table 400.5(A)(2). Fixture wire shall be protected against overcurrent in accordance with its ampacity as specified in Table 402.5. Supplementary overcurrent protection, as covered in 240.10, shall be permitted to be an acceptable means for providing this protection. [240.5_(A)](https://2023.antflix.net#240.5_(A))", + "displayTitle": "(A) Ampacities", + "children": [], + "url": "https://2023.antflix.net#240.5_(A)" + }, + { + "body": "Flexible cord shall be protected, where supplied by a branch circuit, in accordance with one of the methods described in 240.5(B)(1), (B)(3), or (B)(4). Fixture wire shall be protected, where supplied by a branch circuit, in accordance with 240.5(B)(2). [240.5_(B)](https://2023.antflix.net#240.5_(B))", + "displayTitle": "(B) Branch-Circuit Overcurrent Device", + "children": [ + { + "body": "Where flexible cord or tinsel cord is approved for and used with a specific listed appliance or luminaire, it shall be considered to be protected when applied within the appliance or luminaire listing requirements. For the purposes of this section, a luminaire may be either portable or permanent. [240.5_(B)_(1)](https://2023.antflix.net#240.5_(B)_(1))", + "displayTitle": "(1) Supply Cord of Listed Appliance or Luminaire", + "children": [], + "url": "https://2023.antflix.net#240.5_(B)_(1)" + }, + { + "body": "Fixture wire shall be permitted to be tapped to the branch-circuit conductor of a branch circuit in accordance with the following: 15- or 20-ampere circuits - 18 AWG, up to 15 m (50 ft) of run length15- or 20-ampere circuits - 16 AWG, up to 30 m (100 ft) of run length20-ampere circuits - 14 AWG and larger30-ampere circuits - 14 AWG and larger40-ampere circuits - 12 AWG and larger50-ampere circuits - 12 AWG and larger [240.5_(B)_(2)](https://2023.antflix.net#240.5_(B)_(2))", + "displayTitle": "(2) Fixture Wire", + "children": [], + "url": "https://2023.antflix.net#240.5_(B)_(2)" + }, + { + "body": "Flexible cord used in listed extension cord sets shall be considered to be protected when applied within the extension cord listing requirements. [240.5_(B)_(3)](https://2023.antflix.net#240.5_(B)_(3))", + "displayTitle": "(3) Extension Cord Sets", + "children": [], + "url": "https://2023.antflix.net#240.5_(B)_(3)" + }, + { + "body": "Flexible cord used in extension cords made with separately listed and installed components shall be permitted to be supplied by a branch circuit in accordance with the following: 20-ampere circuits - 16 AWG and larger [240.5_(B)_(4)](https://2023.antflix.net#240.5_(B)_(4))", + "displayTitle": "(4) Field Assembled Extension Cord Sets", + "children": [], + "url": "https://2023.antflix.net#240.5_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#240.5_(B)" + } + ], + "url": "https://2023.antflix.net#240.5" + }, + { + "displayTitle": "240.6 Standard Ampere Ratings", + "children": [ + { + "body": "The standard ampere ratings for fuses and inverse time circuit breakers shall be considered as shown in Table 240.6(A). Additional standard ampere ratings for fuses shall be 1, 3, 6, and 601. The use of fuses and inverse time circuit breakers with nonstandard ampere ratings shall be permitted.Table 240.6(A) Standard Ampere Ratings for Fuses and Inverse Time Circuit Breakers Standard Ampere Ratings 10 15 20 25 30 35 40 45 50 60 70 80 90 100 110 125 150 175 200 225 250 300 350 400 450 500 600 700 800 1000 1200 1600 2000 2500 3000 4000 5000 6000 - - [240.6_(A)](https://2023.antflix.net#240.6_(A))", + "displayTitle": "(A) Fuses and Fixed-Trip Circuit Breakers", + "children": [], + "url": "https://2023.antflix.net#240.6_(A)" + }, + { + "body": "The rating of adjustable-trip circuit breakers having external means for adjusting the current setting (long-time pickup setting), not meeting the requirements of 240.6(C), shall be the maximum setting possible. [240.6_(B)](https://2023.antflix.net#240.6_(B))", + "displayTitle": "(B) Adjustable-Trip Circuit Breakers", + "children": [], + "url": "https://2023.antflix.net#240.6_(B)" + }, + { + "body": "A circuit breaker(s) that has restricted access to the adjusting means shall be permitted to have an ampere rating(s) that is equal to the adjusted current setting (long-time pickup setting). Restricted access shall be achieved by one of the following methods: Located behind removable and sealable covers over the adjusting meansLocated behind bolted equipment enclosure doorsLocated behind locked doors accessible only to qualified personnelPassword protected, with password accessible only to qualified personnelInformational Note: See NFPA 730, Guide for Premises Security, and ANSI/TIA-5017, Telecommunications Physical Network Security Standard, for information regarding physical security. [240.6_(C)](https://2023.antflix.net#240.6_(C))", + "displayTitle": "(C) Local Restricted Access Adjustable-Trip Circuit Breakers", + "children": [], + "url": "https://2023.antflix.net#240.6_(C)" + }, + { + "body": "A circuit breaker(s) that can be adjusted remotely to modify the adjusting means shall be permitted to have an ampere rating(s) that is equal to the adjusted current setting (long-time pickup setting). Remote access shall be achieved by one of the following methods: Connected directly through a local non-networked interface.Connected through a networked interface complying with one of the following methods:The circuit breaker and associated software for adjusting the settings are identified as being evaluated for cybersecurity.A cybersecurity assessment of the network is completed. Documentation of the assessment and certification shall be made available to those authorized to inspect, operate, and maintain the system.Informational Note No. 1: See ANSI/ISA 62443, Cybersecurity Standards series, UL 2900 Cybersecurity Standard series, or the NIST Framework for Improving Critical Infrastructure Cybersecurity, Version 1.1 for assessment requirements.Informational Note No. 2: Examples of the commissioning certification used to demonstrate the system has been investigated for cybersecurity vulnerabilities could be one of the following:The ISA Security Compliance Institute (ISCI) conformity assessment programCertification of compliance by a nationally recognized test laboratoryManufacturer certification for the specific type and brand of system providedInformational Note No. 3: Cybersecurity is a specialized field requiring constant, vigilant attention to security vulnerabilities that could arise due to software defects, system configuration changes, or user interactions. Installation of devices that can be secured is an important first step but not sufficient to guarantee a secure system. [240.6_(D)](https://2023.antflix.net#240.6_(D))", + "displayTitle": "(D) Remotely Accessible Adjustable-Trip Circuit Breakers", + "children": [], + "url": "https://2023.antflix.net#240.6_(D)" + } + ], + "url": "https://2023.antflix.net#240.6" + }, + { + "body": "The following shall be listed: Branch-circuit overcurrent protective devicesRelays and circuit breakers providing ground-fault protection of equipmentGround-fault circuit interrupter devices [240.7](https://2023.antflix.net#240.7)", + "displayTitle": "240.7 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#240.7" + }, + { + "body": "Fuses and circuit breakers shall be permitted to be connected in parallel where they are factory assembled in parallel and listed as a unit. Individual fuses, circuit breakers, or combinations thereof shall not otherwise be connected in parallel. [240.8](https://2023.antflix.net#240.8)", + "displayTitle": "240.8 Fuses or Circuit Breakers in Parallel", + "children": [], + "url": "https://2023.antflix.net#240.8" + }, + { + "body": "Thermal relays and other devices not designed to open short circuits or ground faults shall not be used for the protection of conductors against overcurrent due to short circuits or ground faults, but the use of such devices shall be permitted to protect motor branch-circuit conductors from overload if protected in accordance with 430.40. [240.9](https://2023.antflix.net#240.9)", + "displayTitle": "240.9 Thermal Devices", + "children": [], + "url": "https://2023.antflix.net#240.9" + }, + { + "body": "Where supplementary overcurrent protection is used for luminaires, appliances, and other equipment or for internal circuits and components of equipment, it shall not be used as a substitute for required branch-circuit overcurrent devices or in place of the required branch-circuit protection. Supplementary overcurrent devices shall not be required to be readily accessible. [240.10](https://2023.antflix.net#240.10)", + "displayTitle": "240.10 Supplementary Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#240.10" + }, + { + "body": "If one or more feeder overcurrent protective devices are required to be selectively coordinated with a service overcurrent protective device by other requirements in this Code, all feeder overcurrent protective devices supplied directly by the service overcurrent protective device shall be selectively coordinated with the service overcurrent protective device. [240.11](https://2023.antflix.net#240.11)", + "displayTitle": "240.11 Selective Coordination", + "children": [], + "url": "https://2023.antflix.net#240.11" + }, + { + "body": "Where an orderly shutdown is required to minimize the hazard(s) to personnel or equipment, a system of coordination based on the following two conditions shall be permitted: Coordinated short-circuit protectionOverload indication based on monitoring systems or devicesInformational Note: The monitoring system may cause the condition to go to alarm, allowing corrective action or an orderly shutdown, thereby minimizing personnel hazard and equipment damage. [240.12](https://2023.antflix.net#240.12)", + "displayTitle": "240.12 Orderly Shutdown", + "children": [], + "url": "https://2023.antflix.net#240.12" + }, + { + "body": "Ground-fault protection of equipment shall be provided in accordance with 230.95 for solidly grounded wye electrical systems of more than 150 volts to ground but not exceeding 1000 volts phase-to-phase for each individual device used as a building or structure main disconnecting means rated 1000 amperes or more. This section shall not apply to the disconnecting means for the following:Continuous industrial processes where a nonorderly shutdown will introduce additional or increased hazardsInstallations where ground-fault protection is provided by other requirements for services or feedersFire pumps [240.13](https://2023.antflix.net#240.13)", + "displayTitle": "240.13 Ground-Fault Protection of Equipment", + "children": [], + "url": "https://2023.antflix.net#240.13" + }, + { + "displayTitle": "240.15 Ungrounded Conductors", + "children": [ + { + "body": "A fuse or an overcurrent trip unit of a circuit breaker shall be connected in series with each ungrounded conductor. A combination of a current transformer and overcurrent relay shall be considered equivalent to an overcurrent trip unit. Informational Note: See Parts III, IV, V, and XI of Article 430 for motor circuits. [240.15_(A)](https://2023.antflix.net#240.15_(A))", + "displayTitle": "(A) Overcurrent Device Required", + "children": [], + "url": "https://2023.antflix.net#240.15_(A)" + }, + { + "body": "Circuit breakers shall open all ungrounded conductors of the circuit both manually and automatically unless otherwise permitted in 240.15(B)(1), (B)(2), (B)(3), and (B)(4). [240.15_(B)](https://2023.antflix.net#240.15_(B))", + "displayTitle": "(B) Circuit Breaker as Overcurrent Device", + "children": [ + { + "body": "Individual single-pole circuit breakers, with identified handle ties, shall be permitted as the protection for each ungrounded conductor of multiwire branch circuits that serve only single-phase line-to-neutral loads. [240.15_(B)_(1)](https://2023.antflix.net#240.15_(B)_(1))", + "displayTitle": "(1) Multiwire Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#240.15_(B)_(1)" + }, + { + "body": "In grounded systems, individual single-pole circuit breakers rated 120/240 volts ac, with identified handle ties, shall be permitted as the protection for each ungrounded conductor for line-to-line connected loads for single-phase circuits. [240.15_(B)_(2)](https://2023.antflix.net#240.15_(B)_(2))", + "displayTitle": "(2) Grounded Single-Phase Alternating-Current Circuits", + "children": [], + "url": "https://2023.antflix.net#240.15_(B)_(2)" + }, + { + "body": "For line-to-line loads in 4-wire, 3-phase systems or 5-wire, 2-phase systems, individual single-pole circuit breakers rated 120/240 volts ac with identified handle ties shall be permitted as the protection for each ungrounded conductor, if the systems have a grounded neutral point and the voltage to ground does not exceed 120 volts. [240.15_(B)_(3)](https://2023.antflix.net#240.15_(B)_(3))", + "displayTitle": "(3) 3-Phase and 2-Phase Systems", + "children": [], + "url": "https://2023.antflix.net#240.15_(B)_(3)" + }, + { + "body": "Individual single-pole circuit breakers rated 125/250 volts dc with identified handle ties shall be permitted as the protection for each ungrounded conductor for line-to-line connected loads for 3-wire, direct-current circuits supplied from a system with a grounded neutral where the voltage to ground does not exceed 125 volts. [240.15_(B)_(4)](https://2023.antflix.net#240.15_(B)_(4))", + "displayTitle": "(4) 3-Wire Direct-Current Circuits", + "children": [], + "url": "https://2023.antflix.net#240.15_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#240.15_(B)" + } + ], + "url": "https://2023.antflix.net#240.15" + }, + { + "body": "Branch-circuit overcurrent protective devices shall have an interrupting rating no less than 5000 amperes. [240.16](https://2023.antflix.net#240.16)", + "displayTitle": "240.16 Interrupting Ratings", + "children": [], + "url": "https://2023.antflix.net#240.16" + }, + { + "displayTitle": "Part II Location", + "children": [], + "url": "https://2023.antflix.net#divider_6_II" + }, + { + "body": "Overcurrent protection shall be provided in each ungrounded circuit conductor and shall be located at the point where the conductors receive their supply except as specified in 240.21(A) through (H). Conductors supplied under 240.21(A) through (H) shall not supply another conductor except through an overcurrent protective device meeting the requirements of 240.4. [240.21](https://2023.antflix.net#240.21)", + "displayTitle": "240.21 Location in Circuit", + "children": [ + { + "body": "Branch-circuit tap conductors meeting the requirements specified in 210.19 shall be permitted to have overcurrent protection as specified in 210.20. [240.21_(A)](https://2023.antflix.net#240.21_(A))", + "displayTitle": "(A) Branch-Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#240.21_(A)" + }, + { + "body": "Conductors shall be permitted to be tapped, without overcurrent protection at the tap, to a feeder as specified in 240.21(B)(1) through (B)(5). The tap shall be permitted at any point on the load side of the feeder overcurrent protective device. Section 240.4(B) shall not be permitted for tap conductors. [240.21_(B)](https://2023.antflix.net#240.21_(B))", + "displayTitle": "(B) Feeder Taps", + "children": [ + { + "body": "If the length of the tap conductors does not exceed 3 m (10 ft) and the tap conductors comply with all of the following: The ampacity of the tap conductors is as follows:Not less than the combined calculated loads on the circuits supplied by the tap conductorsNot less than the rating of the equipment containing an overcurrent device(s) supplied by the tap conductors or not less than the rating of the overcurrent protective device at the termination of the tap conductorsException to b: Where listed equipment, such as a surge-protective. device(s) [SPD(s)], is provided with specific instructions on minimum conductor sizing, the ampacity of the tap conductors supplying that equipment shall be permitted to be determined based on the manufacturer's instructions.The tap conductors do not extend beyond the switchboard, switchgear, panelboard, disconnecting means, or control devices they supply.Except at the point of connection to the feeder, the tap conductors are enclosed in a raceway, which extends from the tap to the enclosure of an enclosed switchboard, switchgear, a panelboard, or control devices, or to the back of an open switchboard.For field installations, if the tap conductors leave the enclosure or vault in which the tap is made, the ampacity of the tap conductors is not less than one-tenth of the rating of the overcurrent device protecting the feeder conductors.Informational Note: See 408.36 for overcurrent protection requirements for panelboards. [240.21_(B)_(1)](https://2023.antflix.net#240.21_(B)_(1))", + "displayTitle": "(1) Taps Not Over 3 m (10 ft) Long", + "children": [], + "url": "https://2023.antflix.net#240.21_(B)_(1)" + }, + { + "body": "Where the length of the tap conductors does not exceed 7.5 m (25 ft) and the tap conductors comply with all the following: The ampacity of the tap conductors is not less than one-third of the rating of the overcurrent device protecting the feeder conductors.The tap conductors terminate in a single circuit breaker or a single set of fuses that limit the load to the ampacity of the tap conductors. This device shall be permitted to supply any number of additional overcurrent devices on its load side.The tap conductors are protected from physical damage by being enclosed in an approved raceway or by other approved means. [240.21_(B)_(2)](https://2023.antflix.net#240.21_(B)_(2))", + "displayTitle": "(2) Taps Not Over 7.5 m (25 ft) Long", + "children": [], + "url": "https://2023.antflix.net#240.21_(B)_(2)" + }, + { + "body": "Where the tap conductors supply a transformer and comply with all the following conditions: The conductors supplying the primary of a transformer have an ampacity at least one-third the rating of the overcurrent device protecting the feeder conductors.The conductors supplied by the secondary of the transformer shall have an ampacity that is not less than the value of the primary-to-secondary voltage ratio multiplied by one-third of the rating of the overcurrent device protecting the feeder conductors.The total length of one primary plus one secondary conductor, excluding any portion of the primary conductor that is protected at its ampacity, is not over 7.5 m (25 ft).The primary and secondary conductors are protected from physical damage by being enclosed in an approved raceway or by other approved means.The secondary conductors terminate in a single circuit breaker or set of fuses that limit the load current to not more than the conductor ampacity that is permitted by 310.14. [240.21_(B)_(3)](https://2023.antflix.net#240.21_(B)_(3))", + "displayTitle": "(3) Taps Supplying a Transformer [Primary Plus Secondary Not Over 7.5 m (25 ft) Long)", + "children": [], + "url": "https://2023.antflix.net#240.21_(B)_(3)" + }, + { + "body": "Where the feeder is in a high bay manufacturing building over 11 m (35 ft) high at walls and the installation complies with all the following conditions: Conditions of maintenance and supervision ensure that only qualified persons service the systems.The tap conductors are not over 7.5 m (25 ft) long horizontally and not over 30 m (100 ft) total length.The ampacity of the tap conductors is not less than one-third the rating of the overcurrent device protecting the feeder conductors.The tap conductors terminate at a single circuit breaker or a single set of fuses that limit the load to the ampacity of the tap conductors. This single overcurrent device shall be permitted to supply any number of additional overcurrent devices on its load side.The tap conductors are protected from physical damage by being enclosed in an approved raceway or by other approved means.The tap conductors are continuous from end-to-end and contain no splices.The tap conductors are sized 6 AWG copper or 4 AWG aluminum or larger.The tap conductors do not penetrate walls, floors, or ceilings.The tap is made no less than 9 m (30 ft) from the floor. [240.21_(B)_(4)](https://2023.antflix.net#240.21_(B)_(4))", + "displayTitle": "(4) Taps Over 7.5 m (25 ft) Long", + "children": [], + "url": "https://2023.antflix.net#240.21_(B)_(4)" + }, + { + "body": "Where the conductors are located outside of a building or structure, except at the point of load termination, and comply with all of the following conditions: The tap conductors are protected from physical damage in an approved manner.The tap conductors terminate at a single circuit breaker or a single set of fuses that limits the load to the ampacity of the tap conductors. This single overcurrent device shall be permitted to supply any number of additional overcurrent devices on its load side.The overcurrent device for the tap conductors is an integral part of a disconnecting means or shall be located immediately adjacent thereto.The disconnecting means for the tap conductors is installed at a readily accessible location complying with one of the following:Outside of a building or structureInside, nearest the point of entrance of the tap conductorsWhere installed in accordance with 230.6, nearest the point of entrance of the tap conductors [240.21_(B)_(5)](https://2023.antflix.net#240.21_(B)_(5))", + "displayTitle": "(5) Outside Taps of Unlimited Length", + "children": [], + "url": "https://2023.antflix.net#240.21_(B)_(5)" + } + ], + "url": "https://2023.antflix.net#240.21_(B)" + }, + { + "body": "A set of conductors feeding a single load, or each set of conductors feeding separate loads, shall be permitted to be connected to a transformer secondary, without overcurrent protection at the secondary, as specified in 240.21(C)(1) through (C)(6). Section 240.4(B) shall not be permitted for transformer secondary conductors. Informational Note: See 450.3 for overcurrent protection requirements for transformers. [240.21_(C)](https://2023.antflix.net#240.21_(C))", + "displayTitle": "(C) Transformer Secondary Conductors", + "children": [ + { + "body": "Conductors supplied by the secondary side of a single-phase transformer having a 2-wire (single-voltage) secondary, or a three-phase, delta-delta connected transformer having a 3-wire (single-voltage) secondary, shall be permitted to be protected by overcurrent protection provided on the primary (supply) side of the transformer, provided this protection is in accordance with 450.3 and does not exceed the value determined by multiplying the secondary conductor ampacity by the secondary-to-primary transformer voltage ratio. Single-phase (other than 2-wire) and multiphase (other than delta-delta, 3-wire) transformer secondary conductors are not considered to be protected by the primary overcurrent protective device. [240.21_(C)_(1)](https://2023.antflix.net#240.21_(C)_(1))", + "displayTitle": "(1) Protection by Primary Overcurrent Device", + "children": [], + "url": "https://2023.antflix.net#240.21_(C)_(1)" + }, + { + "body": "If the length of secondary conductor does not exceed 3 m (10 ft) and complies with all of the following: The ampacity of the secondary conductors is as follows:Not less than the combined calculated loads on the circuits supplied by the secondary conductorsNot less than the rating of the equipment containing an overcurrent device(s) supplied by the secondary conductors or not less than the rating of the overcurrent protective device at the termination of the secondary conductorsException: Where listed equipment, such as a surge protective device(s) [SPD(s)], is provided with specific instructions on minimum conductor sizing, the ampacity of the lap conductors supplying that equipment shall be permitted to be determined based on the manufacturer's instructions.The secondary conductors do not extend beyond the switchboard, switchgear, panelboard, disconnecting means, or control devices they supply.The secondary conductors are enclosed in a raceway, which shall extend from the transformer to the enclosure of an enclosed switchboard, switchgear, a panelboard, or control devices or to the back of an open switchboard.For field installations where the secondary conductors leave the enclosure or vault in which the supply connection is made, the secondary conductors shall have an ampacity that is not less than the value of the primary-to-secondary voltage ratio multiplied by one-tenth of the rating of the overcurrent device protecting the primary of the transformer.Informational Note: See 408.36 for overcurrent protection requirements for panelboards. [240.21_(C)_(2)](https://2023.antflix.net#240.21_(C)_(2))", + "displayTitle": "(2) Transformer Secondary Conductors Not Over 3 m (10 ft) Long", + "children": [], + "url": "https://2023.antflix.net#240.21_(C)_(2)" + }, + { + "body": "For the supply of switchgear or switchboards in industrial installations only, where the length of the secondary conductors does not exceed 7.5 m (25 ft) and complies with all of the following: Conditions of maintenance and supervision ensure that only qualified persons service the systems.The ampacity of the secondary conductors is not less than the secondary current rating of the transformer, and the sum of the ratings of the overcurrent devices does not exceed the ampacity of the secondary conductors.All overcurrent devices are grouped.The secondary conductors are protected from physical damage by being enclosed in an approved raceway or by other approved means. [240.21_(C)_(3)](https://2023.antflix.net#240.21_(C)_(3))", + "displayTitle": "(3) Industrial Installation Secondary Conductors Not Over 7.5 m (25 ft) Long", + "children": [], + "url": "https://2023.antflix.net#240.21_(C)_(3)" + }, + { + "body": "Where the conductors are located outside of a building or structure, except at the point of load termination, and comply with all of the following conditions: The conductors are protected from physical damage in an approved manner.The conductors terminate at a single circuit breaker or a single set of fuses that limit the load to the ampacity of the conductors. This single overcurrent device shall be permitted to supply any number of additional overcurrent devices on its load side.The overcurrent device for the conductors is an integral part of a disconnecting means or shall be located immediately adjacent thereto.The disconnecting means for the conductors is installed at a readily accessible location complying with one of the following:Outside of a building or structureInside, nearest the point of entrance of the conductorsWhere installed in accordance with 230.6, nearest the point of entrance of the conductors [240.21_(C)_(4)](https://2023.antflix.net#240.21_(C)_(4))", + "displayTitle": "(4) Outside Secondary Conductors", + "children": [], + "url": "https://2023.antflix.net#240.21_(C)_(4)" + }, + { + "body": "Transformer secondary conductors installed in accordance with 240.21(B)(3) shall be permitted to have overcurrent protection as specified in that section. [240.21_(C)_(5)](https://2023.antflix.net#240.21_(C)_(5))", + "displayTitle": "(5) Secondary Conductors From a Feeder Tapped Transformer", + "children": [], + "url": "https://2023.antflix.net#240.21_(C)_(5)" + }, + { + "body": "Where the length of secondary conductor does not exceed 7.5 m (25 ft) and complies with all of the following: The secondary conductors shall have an ampacity that is not less than the value of the primary-to-secondary voltage ratio multiplied by one-third of the rating of the overcurrent device protecting the primary of the transformer.The secondary conductors terminate in a single circuit breaker or set of fuses that limit the load current to not more than the conductor ampacity that is permitted by 310.14.The secondary conductors are protected from physical damage by being enclosed in an approved raceway or by other approved means. [240.21_(C)_(6)](https://2023.antflix.net#240.21_(C)_(6))", + "displayTitle": "(6) Secondary Conductors Not Over 7.5 m (25 ft) Long", + "children": [], + "url": "https://2023.antflix.net#240.21_(C)_(6)" + } + ], + "url": "https://2023.antflix.net#240.21_(C)" + }, + { + "body": "Service conductors shall be permitted to be protected by overcurrent devices in accordance with 230.91. [240.21_(D)](https://2023.antflix.net#240.21_(D))", + "displayTitle": "(D) Service Conductors", + "children": [], + "url": "https://2023.antflix.net#240.21_(D)" + }, + { + "body": "Busways and busway taps shall be permitted to be protected against overcurrent in accordance with 368.17. [240.21_(E)](https://2023.antflix.net#240.21_(E))", + "displayTitle": "(E) Busway Taps", + "children": [], + "url": "https://2023.antflix.net#240.21_(E)" + }, + { + "body": "Motor-feeder and branch-circuit conductors shall be permitted to be protected against overcurrent in accordance with 430.28 and 430.53, respectively. [240.21_(F)](https://2023.antflix.net#240.21_(F))", + "displayTitle": "(F) Motor Circuit Taps", + "children": [], + "url": "https://2023.antflix.net#240.21_(F)" + }, + { + "body": "Conductors from generator terminals that meet the size requirement in 445.13 shall be permitted to be protected against overload by the generator overload protective device(s) required by 445.12. [240.21_(G)](https://2023.antflix.net#240.21_(G))", + "displayTitle": "(G) Conductors From Generator Terminals", + "children": [], + "url": "https://2023.antflix.net#240.21_(G)" + }, + { + "body": "Overcurrent protection shall be permitted to be installed as close as practicable to the storage battery terminals in an unclassified location. Installation of the overcurrent protection within a hazardous (classified) location shall also be permitted. [240.21_(H)](https://2023.antflix.net#240.21_(H))", + "displayTitle": "(H) Battery Conductors", + "children": [], + "url": "https://2023.antflix.net#240.21_(H)" + } + ], + "url": "https://2023.antflix.net#240.21" + }, + { + "body": "No overcurrent device shall be connected in series with any conductor that is intentionally grounded, unless one of the following two conditions is met: The overcurrent device opens all conductors of the circuit, including the grounded conductor, and is designed so that no pole can operate independently.Where required by 430.36 or 430.37 for motor overload protection. [240.22](https://2023.antflix.net#240.22)", + "displayTitle": "240.22 Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#240.22" + }, + { + "displayTitle": "240.24 Location in or on Premises", + "children": [ + { + "body": "Circuit breakers and switches containing fuses shall be readily accessible and installed so that the center of the grip of the operating handle of the switch or circuit breaker, when in its highest position, is not more than 2.0 m (6 ft 7 in.) above the floor or working platform, unless one of the following applies: For busways, as provided in 368.17(C).For supplementary overcurrent protection, as described in 240.10.For overcurrent protective devices, as described in 225.40 and 230.92.For overcurrent protective devices adjacent to utilization equipment that they supply, access shall be permitted to be by portable means.Exception: The use of a tool shall be permitted to access overcurrent protective devices located within listed industrial control panels, within enclosures designed for hazardous (classified) locations or enclosures to protect against environmental conditions. An enclosure within the scope of this exception, and all overcurrent protective device(s) within such enclosures as judged with the enclosure open, shall comply with the accessibility provisions of 240.24(A). [240.24_(A)](https://2023.antflix.net#240.24_(A))", + "displayTitle": "(A) Accessibility", + "children": [], + "url": "https://2023.antflix.net#240.24_(A)" + }, + { + "body": "Each occupant shall have ready access to all overcurrent devices protecting the conductors supplying that occupancy, unless otherwise permitted in 240.24(B)(1) and (B)(2). [240.24_(B)](https://2023.antflix.net#240.24_(B))", + "displayTitle": "(B) Occupancy", + "children": [ + { + "body": "Where electric service and electrical maintenance are provided by the building management and where these are under continuous building management supervision, the service overcurrent protective devices and feeder overcurrent protective devices supplying more than one occupancy shall be permitted to be accessible only to authorized management personnel in the following: Multiple-occupancy buildingsGuest rooms or guest suites [240.24_(B)_(1)](https://2023.antflix.net#240.24_(B)_(1))", + "displayTitle": "(1) Service and Feeder Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#240.24_(B)_(1)" + }, + { + "body": "Where electric service and electrical maintenance are provided by the building management and where these are under continuous building management supervision, the branch-circuit overcurrent protective devices supplying any guest rooms, guest suites, or sleeping rooms in dormitory units without permanent provisions for cooking shall be permitted to be accessible only to authorized management personnel. [240.24_(B)_(2)](https://2023.antflix.net#240.24_(B)_(2))", + "displayTitle": "(2) Branch-Circuit Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#240.24_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#240.24_(B)" + }, + { + "body": "Overcurrent protective devices shall be located where they will not be exposed to physical damage. Informational Note: See 110.11 for information on deteriorating agents that could cause physical damage. [240.24_(C)](https://2023.antflix.net#240.24_(C))", + "displayTitle": "(C) Not Exposed to Physical Damage", + "children": [], + "url": "https://2023.antflix.net#240.24_(C)" + }, + { + "body": "Overcurrent protective devices shall not be located in the vicinity of easily ignitible material, such as in clothes closets. [240.24_(D)](https://2023.antflix.net#240.24_(D))", + "displayTitle": "(D) Not in Vicinity of Easily Ignitible Material", + "children": [], + "url": "https://2023.antflix.net#240.24_(D)" + }, + { + "body": "Overcurrent protective devices, other than supplementary overcurrent protection, shall not be located in bathrooms, showering facilities, or locker rooms with showering facilities. [240.24_(E)](https://2023.antflix.net#240.24_(E))", + "displayTitle": "(E) Not Located in Bathrooms", + "children": [], + "url": "https://2023.antflix.net#240.24_(E)" + }, + { + "body": "Overcurrent protective devices shall not be located over steps of a stairway. [240.24_(F)](https://2023.antflix.net#240.24_(F))", + "displayTitle": "(F) Not Located Over Steps", + "children": [], + "url": "https://2023.antflix.net#240.24_(F)" + } + ], + "url": "https://2023.antflix.net#240.24" + }, + { + "displayTitle": "Part III Enclosures", + "children": [], + "url": "https://2023.antflix.net#divider_5_III" + }, + { + "displayTitle": "240.30 General", + "children": [ + { + "body": "Overcurrent devices shall be protected from physical damage by one of the following: Installation in enclosures, cabinets, cutout boxes, or equipment assembliesMounting on open-type switchboards, panelboards, or control boards that are in rooms or enclosures free from dampness and easily ignitible material and are accessible only to qualified personnel [240.30_(A)](https://2023.antflix.net#240.30_(A))", + "displayTitle": "(A) Protection From Physical Damage", + "children": [], + "url": "https://2023.antflix.net#240.30_(A)" + }, + { + "body": "The operating handle of a circuit breaker shall be permitted to be accessible without opening a door or cover. [240.30_(B)](https://2023.antflix.net#240.30_(B))", + "displayTitle": "(B) Operating Handle", + "children": [], + "url": "https://2023.antflix.net#240.30_(B)" + } + ], + "url": "https://2023.antflix.net#240.30" + }, + { + "body": "Enclosures for overcurrent devices in damp or wet locations shall comply with 312.2. [240.32](https://2023.antflix.net#240.32)", + "displayTitle": "240.32 Damp or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#240.32" + }, + { + "body": "Enclosures for overcurrent devices shall be mounted in a vertical position. Circuit breaker enclosures shall be permitted to be installed horizontally where the circuit breaker is installed in accordance with 240.81. Listed busway plug-in units shall be permitted to be mounted in orientations corresponding to the busway mounting position. [240.33](https://2023.antflix.net#240.33)", + "displayTitle": "240.33 Vertical Position", + "children": [], + "url": "https://2023.antflix.net#240.33" + }, + { + "displayTitle": "Part IV Disconnecting and Guarding", + "children": [], + "url": "https://2023.antflix.net#divider_4_IV" + }, + { + "body": "Cartridge fuses in circuits of any voltage, and all fuses in circuits over 150 volts to ground, shall be provided with a disconnecting means on their supply side so that each circuit containing fuses can be independently disconnected from the source of power. A cable limiter without a disconnecting means shall be permitted on the supply side of the service disconnecting means as permitted by 230.82. A single disconnecting means shall be permitted on the supply side of more than one set of fuses as permitted by 430.112, Exception, for group operation of motors, 424.22(C) for fixed electric space-heating equipment, and 425.22(C) for fixed resistance and electrode industrial process heating equipment, or where specifically permitted elsewhere in this Code. [240.40](https://2023.antflix.net#240.40)", + "displayTitle": "240.40 Disconnecting Means for Fuses", + "children": [], + "url": "https://2023.antflix.net#240.40" + }, + { + "body": "Arcing or suddenly moving parts shall comply with 240.41(A) and (B). [240.41](https://2023.antflix.net#240.41)", + "displayTitle": "240.41 Arcing or Suddenly Moving Parts", + "children": [ + { + "body": "Fuses and circuit breakers shall be located or shielded so that persons will not be burned or otherwise injured by their operation. [240.41_(A)](https://2023.antflix.net#240.41_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#240.41_(A)" + }, + { + "body": "Handles or levers of circuit breakers, and similar parts that may move suddenly in such a way that persons in the vicinity are likely to be injured by being struck by them, shall be guarded or isolated. [240.41_(B)](https://2023.antflix.net#240.41_(B))", + "displayTitle": "(B) Suddenly Moving Parts", + "children": [], + "url": "https://2023.antflix.net#240.41_(B)" + } + ], + "url": "https://2023.antflix.net#240.41" + }, + { + "displayTitle": "Part V Plug Fuses, Fuseholders, and Adapters", + "children": [], + "url": "https://2023.antflix.net#divider_4_V" + }, + { + "displayTitle": "240.50 General", + "children": [ + { + "body": "Plug fuses shall be permitted to be used in the following circuits: Circuits not exceeding 125 volts between conductorsCircuits supplied by a system having a grounded neutral point where the line-to-neutral voltage does not exceed 150 volts [240.50_(A)](https://2023.antflix.net#240.50_(A))", + "displayTitle": "(A) Maximum Voltage", + "children": [], + "url": "https://2023.antflix.net#240.50_(A)" + }, + { + "body": "Each fuse, fuseholder, and adapter shall be marked with its ampere rating. [240.50_(B)](https://2023.antflix.net#240.50_(B))", + "displayTitle": "(B) Marking", + "children": [], + "url": "https://2023.antflix.net#240.50_(B)" + }, + { + "body": "Plug fuses of 15-ampere and lower rating shall be identified by a hexagonal configuration of the window, cap, or other prominent part to distinguish them from fuses of higher ampere ratings. [240.50_(C)](https://2023.antflix.net#240.50_(C))", + "displayTitle": "(C) Hexagonal Configuration", + "children": [], + "url": "https://2023.antflix.net#240.50_(C)" + }, + { + "body": "Plug fuses, fuseholders, and adapters shall have no exposed energized parts after fuses or fuses and adapters have been installed. [240.50_(D)](https://2023.antflix.net#240.50_(D))", + "displayTitle": "(D) No Energized Parts", + "children": [], + "url": "https://2023.antflix.net#240.50_(D)" + }, + { + "body": "The screw shell of a plug-type fuseholder shall be connected to the load side of the circuit. [240.50_(E)](https://2023.antflix.net#240.50_(E))", + "displayTitle": "(E) Screw Shell", + "children": [], + "url": "https://2023.antflix.net#240.50_(E)" + } + ], + "url": "https://2023.antflix.net#240.50" + }, + { + "displayTitle": "240.51 Edison-Base Fuses", + "children": [ + { + "body": "Plug fuses of the Edison-base type shall be classified at not over 125 volts and 30 amperes and below. [240.51_(A)](https://2023.antflix.net#240.51_(A))", + "displayTitle": "(A) Classification", + "children": [], + "url": "https://2023.antflix.net#240.51_(A)" + }, + { + "body": "Plug fuses of the Edison-base type shall be used only for replacements in existing installations where there is no evidence of overfusing or tampering. [240.51_(B)](https://2023.antflix.net#240.51_(B))", + "displayTitle": "(B) Replacement Only", + "children": [], + "url": "https://2023.antflix.net#240.51_(B)" + } + ], + "url": "https://2023.antflix.net#240.51" + }, + { + "body": "Fuseholders of the Edison-base type shall be installed only where they are made to accept Type S fuses by the use of adapters. [240.52](https://2023.antflix.net#240.52)", + "displayTitle": "240.52 Edison-Base Fuseholders", + "children": [], + "url": "https://2023.antflix.net#240.52" + }, + { + "body": "Type S fuses shall be of the plug type and shall comply with 240.53(A) and (B). [240.53](https://2023.antflix.net#240.53)", + "displayTitle": "240.53 Type S Fuses", + "children": [ + { + "body": "Type S fuses shall be classified at not over 125 volts and 0 to 15 amperes, 16 to 20 amperes, and 21 to 30 amperes. [240.53_(A)](https://2023.antflix.net#240.53_(A))", + "displayTitle": "(A) Classification", + "children": [], + "url": "https://2023.antflix.net#240.53_(A)" + }, + { + "body": "Type S fuses of an ampere classification as specified in 240.53(A) shall not be interchangeable with a lower ampere classification. They shall be designed so that they cannot be used in any fuseholder other than a Type S fuseholder or a fuseholder with a Type S adapter inserted. [240.53_(B)](https://2023.antflix.net#240.53_(B))", + "displayTitle": "(B) Noninterchangeable", + "children": [], + "url": "https://2023.antflix.net#240.53_(B)" + } + ], + "url": "https://2023.antflix.net#240.53" + }, + { + "displayTitle": "240.54 Type S Fuses, Adapters, and Fuseholders", + "children": [ + { + "body": "Type S adapters shall fit Edison-base fuseholders. [240.54_(A)](https://2023.antflix.net#240.54_(A))", + "displayTitle": "(A) To Fit Edison-Base Fuseholders", + "children": [], + "url": "https://2023.antflix.net#240.54_(A)" + }, + { + "body": "Type S fuseholders and adapters shall be designed so that either the fuseholder itself or the fuseholder with a Type S adapter inserted cannot be used for any fuse other than a Type S fuse. [240.54_(B)](https://2023.antflix.net#240.54_(B))", + "displayTitle": "(B) To Fit Type S Fuses Only", + "children": [], + "url": "https://2023.antflix.net#240.54_(B)" + }, + { + "body": "Type S adapters shall be designed so that once inserted in a fuseholder, they cannot be removed. [240.54_(C)](https://2023.antflix.net#240.54_(C))", + "displayTitle": "(C) Nonremovable", + "children": [], + "url": "https://2023.antflix.net#240.54_(C)" + }, + { + "body": "Type S fuses, fuseholders, and adapters shall be designed so that tampering or shunting (bridging) would be difficult. [240.54_(D)](https://2023.antflix.net#240.54_(D))", + "displayTitle": "(D) Nontamperable", + "children": [], + "url": "https://2023.antflix.net#240.54_(D)" + }, + { + "body": "Dimensions of Type S fuses, fuseholders, and adapters shall be standardized to permit interchangeability regardless of the manufacturer. [240.54_(E)](https://2023.antflix.net#240.54_(E))", + "displayTitle": "(E) Interchangeability", + "children": [], + "url": "https://2023.antflix.net#240.54_(E)" + } + ], + "url": "https://2023.antflix.net#240.54" + }, + { + "displayTitle": "Part VI Cartridge Fuses and Fuseholders", + "children": [], + "url": "https://2023.antflix.net#divider_1_VI" + }, + { + "displayTitle": "240.60 General", + "children": [ + { + "body": "Cartridge fuses and fuseholders of the 300-volt type shall be permitted to be used in the following circuits: Circuits not exceeding 300 volts between conductorsSingle-phase line-to-neutral circuits supplied from a 3-phase, 4-wire, solidly grounded neutral source where the line-to-neutral voltage does not exceed 300 volts [240.60_(A)](https://2023.antflix.net#240.60_(A))", + "displayTitle": "(A) Maximum Voltage - 300-Volt Type", + "children": [], + "url": "https://2023.antflix.net#240.60_(A)" + }, + { + "body": "Fuseholders shall be designed so that it will be difficult to put a fuse of any given class into a fuseholder that is designed for a current lower, or voltage higher, than that of the class to which the fuse belongs. Fuseholders for current-limiting fuses shall not permit insertion of fuses that are not current-limiting. [240.60_(B)](https://2023.antflix.net#240.60_(B))", + "displayTitle": "(B) Noninterchangeable - 0\u20146000-Ampere Cartridge Fuseholders", + "children": [], + "url": "https://2023.antflix.net#240.60_(B)" + }, + { + "body": "Fuses shall be plainly marked, either by printing on the fuse barrel or by a label attached to the barrel showing the following: Ampere ratingVoltage ratingInterrupting rating where other than 10,000 amperesCurrent limiting where applicableThe name or trademark of the manufacturerThe interrupting rating shall not be required to be marked on fuses used for supplementary protection. [240.60_(C)](https://2023.antflix.net#240.60_(C))", + "displayTitle": "(C) Marking", + "children": [], + "url": "https://2023.antflix.net#240.60_(C)" + }, + { + "body": "Class H cartridge fuses of the renewable type shall be permitted to be used only for replacement in existing installations where there is no evidence of overfusing or tampering. [240.60_(D)](https://2023.antflix.net#240.60_(D))", + "displayTitle": "(D) Renewable Fuses", + "children": [], + "url": "https://2023.antflix.net#240.60_(D)" + }, + { + "body": "Fuse reducers shall be listed. [240.60_(E)](https://2023.antflix.net#240.60_(E))", + "displayTitle": "(E) Fuse Reducers", + "children": [], + "url": "https://2023.antflix.net#240.60_(E)" + } + ], + "url": "https://2023.antflix.net#240.60" + }, + { + "body": "Cartridge fuses and fuseholders shall be classified according to voltage and amperage ranges. Fuses rated 1000 volts, nominal, or less shall be permitted to be used for voltages at or below their ratings. [240.61](https://2023.antflix.net#240.61)", + "displayTitle": "240.61 Classification", + "children": [], + "url": "https://2023.antflix.net#240.61" + }, + { + "body": "Where fuses rated 1200 amperes or higher are installed, 240.67(A), (B), and (C) shall apply. [240.67](https://2023.antflix.net#240.67)", + "displayTitle": "240.67 Arc Energy Reduction", + "children": [ + { + "body": "Documentation shall be available to those authorized to design, install, operate, or inspect the installation as to the location of the fuses. Documentation shall also be provided to demonstrate that the method chosen to reduce clearing time is set to operate at a value below the available arcing current. [240.67_(A)](https://2023.antflix.net#240.67_(A))", + "displayTitle": "(A) Documentation", + "children": [], + "url": "https://2023.antflix.net#240.67_(A)" + }, + { + "body": "A fuse shall have a clearing time of 0.07 seconds or less at the available arcing current, or one of the following means shall be provided and shall be set to operate at less than the available arcing current: Differential relayingEnergy-reducing maintenance switching with local status indicatorEnergy-reducing active arc-flash mitigation systemCurrent-limiting, electronically actuated fusesAn approved equivalent meansInformational Note No. 1: An energy-reducing maintenance switch allows a worker to set a disconnect switch to reduce the clearing time while the worker is working within an arc-flash boundary as defined in NFPA 70E-2021, Standard for Electrical Safety in the Workplace, and then to set the disconnect switch back to a normal setting after the potentially hazardous work is complete.Informational Note No. 2: An energy-reducing active arc-flash mitigation system helps in reducing arcing duration in the electrical distribution system. No change in the disconnect switch or the settings of other devices is required during maintenance when a worker is working within an arc-flash boundary as defined in NFPA 70E-2021, Standard for Electrical Safety in the Workplace.Informational Note No. 3: IEEE 1584-2018, IEEE Guide for Performing Arc Flash Hazard Calculations, provides guidance in determining arcing current. [240.67_(B)](https://2023.antflix.net#240.67_(B))", + "displayTitle": "(B) Method to Reduce Clearing Time", + "children": [], + "url": "https://2023.antflix.net#240.67_(B)" + }, + { + "body": "The arc energy reduction protection system shall be performance tested by primary current injection testing or another approved method when first installed on site. This testing shall be conducted by a qualified person(s) in accordance with the manufacturer's instructions. A written record of this testing shall be made and shall be available to the authority having jurisdiction. Informational Note: Some energy reduction protection systems cannot be tested using a test process of primary current injection due to either the protection method being damaged such as with the use of fuse technology or because current is not the primary method of arc detection. [240.67_(C)](https://2023.antflix.net#240.67_(C))", + "displayTitle": "(C) Performance Testing", + "children": [], + "url": "https://2023.antflix.net#240.67_(C)" + } + ], + "url": "https://2023.antflix.net#240.67" + }, + { + "displayTitle": "Part VII Circuit Breakers", + "children": [], + "url": "https://2023.antflix.net#divider_1_VII" + }, + { + "body": "Circuit breakers shall be trip free and capable of being closed and opened by manual operation. Their normal method of operation by other than manual means, such as electrical or pneumatic, shall be permitted if means for manual operation are also provided. [240.80](https://2023.antflix.net#240.80)", + "displayTitle": "240.80 Method of Operation", + "children": [], + "url": "https://2023.antflix.net#240.80" + }, + { + "body": "Circuit breakers shall clearly indicate whether they are in the open \"off\" or closed \"on\" position. Where circuit breaker handles are operated vertically rather than rotationally or horizontally, the \"up\" position of the handle shall be the \"on\" position. [240.81](https://2023.antflix.net#240.81)", + "displayTitle": "240.81 Indicating", + "children": [], + "url": "https://2023.antflix.net#240.81" + }, + { + "body": "A circuit breaker shall be of such design that any alteration of its trip point (calibration) or the time required for its operation requires dismantling of the device or breaking of a seal for other than intended adjustments. [240.82](https://2023.antflix.net#240.82)", + "displayTitle": "240.82 Nontamperable", + "children": [], + "url": "https://2023.antflix.net#240.82" + }, + { + "displayTitle": "240.83 Marking", + "children": [ + { + "body": "Circuit breakers shall be marked with their ampere rating in a manner that will be durable and visible after installation. Such marking shall be permitted to be made visible by removal of a trim or cover. [240.83_(A)](https://2023.antflix.net#240.83_(A))", + "displayTitle": "(A) Durable and Visible", + "children": [], + "url": "https://2023.antflix.net#240.83_(A)" + }, + { + "body": "Circuit breakers rated at 100 amperes or less and 1000 volts or less shall have the ampere rating molded, stamped, etched, or similarly marked into their handles or escutcheon areas. [240.83_(B)](https://2023.antflix.net#240.83_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#240.83_(B)" + }, + { + "body": "Every circuit breaker having an interrupting rating other than 5000 amperes shall have its interrupting rating shown on the circuit breaker. The interrupting rating shall not be required to be marked on circuit breakers used for supplementary protection. [240.83_(C)](https://2023.antflix.net#240.83_(C))", + "displayTitle": "(C) Interrupting Rating", + "children": [], + "url": "https://2023.antflix.net#240.83_(C)" + }, + { + "body": "Circuit breakers used as switches in 120-volt and 277-volt fluorescent lighting circuits shall be listed and shall be marked SWD or HID. Circuit breakers used as switches in high-intensity discharge lighting circuits shall be listed and shall be marked as HID. [240.83_(D)](https://2023.antflix.net#240.83_(D))", + "displayTitle": "(D) Used as Switches", + "children": [], + "url": "https://2023.antflix.net#240.83_(D)" + }, + { + "body": "Circuit breakers shall be marked with a voltage rating not less than the nominal system voltage that is indicative of their capability to interrupt fault currents between phases or phase to ground. [240.83_(E)](https://2023.antflix.net#240.83_(E))", + "displayTitle": "(E) Voltage Marking", + "children": [], + "url": "https://2023.antflix.net#240.83_(E)" + } + ], + "url": "https://2023.antflix.net#240.83" + }, + { + "body": "A circuit breaker with a straight voltage rating, such as 240V or 480V, shall be permitted to be applied in a circuit in which the nominal voltage between any two conductors does not exceed the circuit breaker's voltage rating. A two-pole circuit breaker shall not be used for protecting a 3-phase, corner-grounded delta circuit unless the circuit breaker is marked 1\u03d5\u20143\u03d5 to indicate such suitability. A circuit breaker with a slash rating, such as 120/240V or 480Y/277V, shall be permitted to be applied in a solidly grounded circuit where the nominal voltage of any conductor to ground does not exceed the lower of the two values of the circuit breaker's voltage rating and the nominal voltage between any two conductors does not exceed the higher value of the circuit breaker's voltage rating. Informational Note: Proper application of molded case circuit breakers on 3-phase systems, other than solidly grounded wye, particularly on corner grounded delta systems, considers the circuit breakers' individual pole-interrupting capability. [240.85](https://2023.antflix.net#240.85)", + "displayTitle": "240.85 Applications", + "children": [], + "url": "https://2023.antflix.net#240.85" + }, + { + "body": "Where a circuit breaker is used on a circuit having an available fault current higher than the marked interrupting rating by being connected on the load side of an approved overcurrent protective device having a higher rating, the circuit breaker shall meet the requirements specified in 240.86(A) or (B), and (C). [240.86](https://2023.antflix.net#240.86)", + "displayTitle": "240.86 Series Ratings", + "children": [ + { + "body": "The series rated combination devices shall be selected by a licensed professional engineer engaged primarily in the design or maintenance of electrical installations. The selection shall be documented and stamped by the professional engineer. This documentation shall be available to those authorized to design, install, inspect, maintain, and operate the system. This series combination rating, including identification of the upstream device, shall be field marked on the end use equipment. For calculated applications, the engineer shall ensure that the downstream circuit breaker(s) that are part of the series combination remain passive during the interruption period of the line side fully rated, current-limiting device. Informational Note: See 110.22 for marking of series combination systems. [240.86_(A)](https://2023.antflix.net#240.86_(A))", + "displayTitle": "(A) Selected Under Engineering Supervision in Existing Installations", + "children": [], + "url": "https://2023.antflix.net#240.86_(A)" + }, + { + "body": "The combination of line-side overcurrent device and load-side circuit breaker(s) is tested and marked on the end use equipment, such as switchboards and panelboards. Informational Note: See 110.22 for marking of series combination systems. [240.86_(B)](https://2023.antflix.net#240.86_(B))", + "displayTitle": "(B) Tested Combinations", + "children": [], + "url": "https://2023.antflix.net#240.86_(B)" + }, + { + "body": "Series ratings shall not be used in the following situations: Where motor circuits are connected between the higher-rated overcurrent device of a series-rated combination and on the lower-rated circuit breakerWhere the sum of these motor full-load currents exceeds 1 percent of the interrupting rating of the lower-rated circuit breaker [240.86_(C)](https://2023.antflix.net#240.86_(C))", + "displayTitle": "(C) Motor Contribution", + "children": [], + "url": "https://2023.antflix.net#240.86_(C)" + } + ], + "url": "https://2023.antflix.net#240.86" + }, + { + "body": "Where the highest continuous current trip setting for which the actual overcurrent device installed in a circuit breaker is rated or can be adjusted is 1200 amperes or higher, 240.87(A), (B), and (C) shall apply. [240.87](https://2023.antflix.net#240.87)", + "displayTitle": "240.87 Arc Energy Reduction", + "children": [ + { + "body": "Documentation shall be available to those authorized to design, install, operate, or inspect the installation as to the location of the circuit breaker(s). Documentation shall also be provided to demonstrate that the method chosen to reduce clearing time is set to operate at a value below the available arcing current. [240.87_(A)](https://2023.antflix.net#240.87_(A))", + "displayTitle": "(A) Documentation", + "children": [], + "url": "https://2023.antflix.net#240.87_(A)" + }, + { + "body": "One of the following means shall be provided and shall be set to operate at less than the available arcing current: Zone-selective interlockingDifferential relayingEnergy-reducing maintenance switching with local status indicatorEnergy-reducing active arc flash mitigation systemAn instantaneous trip setting. Temporary adjustment of the instantaneous trip setting to achieve arc energy reduction shall not be permitted.An instantaneous overrideAn approved equivalent meansInformational Note No. 1: An energy-reducing maintenance switch allows a worker to set a circuit breaker trip unit to \"no intentional delay\" to reduce the clearing time while the worker is working within an arc-flash boundary as defined in NFPA 70E-2021, Standard for Electrical Safety in the Workplace, and then to set the trip unit back to a normal setting after the potentially hazardous work is complete.Informational Note No. 2: An energy-reducing active arc-flash mitigation system helps in reducing arcing duration in the electrical distribution system. No change in the circuit breaker or the settings of other devices is required during maintenance when a worker is working within an arc-flash boundary as defined in NFPA 70E-2021, Standard for Electrical Safety in the Workplace.Informational Note No. 3: An instantaneous trip is a function that causes a circuit breaker to trip with no intentional delay when currents exceed the instantaneous trip setting or current level. If arcing currents are above the instantaneous trip level, the circuit breaker will trip in the minimum possible time.Informational Note No. 4: See IEEE 1584-2018, IEEE Guide for Performing Arc Flash Hazard Calculations, for guidance in determining arcing current. [240.87_(B)](https://2023.antflix.net#240.87_(B))", + "displayTitle": "(B) Method to Reduce Clearing Time", + "children": [], + "url": "https://2023.antflix.net#240.87_(B)" + }, + { + "body": "The arc energy reduction protection system shall be performance tested by primary current injection testing or another approved method when first installed on site. This testing shall be conducted by a qualified person(s) in accordance with the manufacturer's instructions. A written record of this testing shall be made and shall be available to the authority having jurisdiction. Informational Note: Some energy reduction protection systems cannot be tested using a test process of primary current injection due to either the protection method being damaged such as with the use of fuse technology or because current is not the primary method of arc detection. [240.87_(C)](https://2023.antflix.net#240.87_(C))", + "displayTitle": "(C) Performance Testing", + "children": [], + "url": "https://2023.antflix.net#240.87_(C)" + } + ], + "url": "https://2023.antflix.net#240.87" + }, + { + "body": "Replacement trip units shall be listed for use with the circuit breaker type in which it is installed. Informational Note: The replacement trip unit can be a listed unit identical to the original or a different trip unit listed for use with the specific circuit breaker. [240.89](https://2023.antflix.net#240.89)", + "displayTitle": "240.89 Replacement Trip Units", + "children": [], + "url": "https://2023.antflix.net#240.89" + }, + { + "displayTitle": "Part VIII Supervised Industrial Installations", + "children": [], + "url": "https://2023.antflix.net#divider_2_VIII" + }, + { + "body": "Overcurrent protection in areas of supervised industrial installations shall comply with all of the other applicable provisions of this article, except as provided in Part VIII. Part VIII shall be permitted to apply only to those portions of the electrical system in the supervised industrial installation used exclusively for manufacturing or process control activities. [240.90](https://2023.antflix.net#240.90)", + "displayTitle": "240.90 General", + "children": [], + "url": "https://2023.antflix.net#240.90" + }, + { + "body": "Conductors shall be protected in accordance with 240.91 (A) or 240.91 (B). [240.91](https://2023.antflix.net#240.91)", + "displayTitle": "240.91 Protection of Conductors", + "children": [ + { + "body": "Conductors shall be protected in accordance with 240.4. [240.91_(A)](https://2023.antflix.net#240.91_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#240.91_(A)" + }, + { + "body": "Where the overcurrent device is rated over 800 amperes, the ampacity of the conductors it protects shall be equal to or greater than 95 percent of the rating of the overcurrent device in accordance with the following: The conductors are protected within recognized time vs. current limits for short-circuit currentsInformational Note: Table 240.92(B) provides time vs. short-circuit current formulas to determine limits for copper and aluminum conductors.All equipment in which the conductors terminate is listed and marked for the application. [240.91_(B)](https://2023.antflix.net#240.91_(B))", + "displayTitle": "(B) Devices Rated Over 800 Amperes", + "children": [], + "url": "https://2023.antflix.net#240.91_(B)" + } + ], + "url": "https://2023.antflix.net#240.91" + }, + { + "body": "An overcurrent device shall be connected in each ungrounded circuit conductor as required in 240.92(A) through (E). [240.92](https://2023.antflix.net#240.92)", + "displayTitle": "240.92 Location in Circuit", + "children": [ + { + "body": "Feeder and branch-circuit conductors shall be protected at the point the conductors receive their supply as permitted in 240.21 or as otherwise permitted in 240.92(B), (C), (D), or (E). [240.92_(A)](https://2023.antflix.net#240.92_(A))", + "displayTitle": "(A) Feeder and Branch-Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#240.92_(A)" + }, + { + "body": "For feeder taps specified in 240.21(B)(2), (B)(3), and (B)(4), the tap conductors shall be permitted to be sized in accordance with Table 240.92(B).Table 240.92(B) Tap Conductor Short-Circuit Current Ratings Tap conductors are considered to be protected under short-circuit conditions when their short-circuit temperature limit is not exceeded. Conductor heating under short-circuit conditions is determined by (1) or (2): (1) Short-Circuit Formula for Copper Conductors (I2/A2) t = 0.0297 log10 [(T2 + 234)/(T1 + 234)] (2) Short-Circuit Formula for Aluminum Conductors (I2/A2) t = 0.0125 log10 [(T2 + 228)/(T1 + 228)] where: I = short-circuit current in amperes A = conductor area in circular mils t = time of short circuit in seconds (for times less than or equal to 10 seconds) T1 = initial conductor temperature in degrees Celsius T2 = final conductor temperature in degrees Celsius Copper conductor with paper, rubber, varnished cloth insulation, T2 = 200 Copper conductor with thermoplastic insulation, T2 = 150 Copper conductor with cross-linked polyethylene insulation, T2 = 250 Copper conductor with ethylene propylene rubber insulation, T2 = 250 Aluminum conductor with paper, rubber, varnished cloth insulation, T2 = 200 Aluminum conductor with thermoplastic insulation, T2 = 150 Aluminum conductor with cross-linked polyethylene insulation, T2 = 250 Aluminum conductor with ethylene propylene rubber insulation, T2 = 250 [240.92_(B)](https://2023.antflix.net#240.92_(B))", + "displayTitle": "(B) Feeder Taps", + "children": [], + "url": "https://2023.antflix.net#240.92_(B)" + }, + { + "body": "Conductors shall be permitted to be connected to a transformer secondary of a separately derived system, without overcurrent protection at the connection, where the conditions of 240.92(C)(1), (C)(2), and (C)(3) are met. [240.92_(C)](https://2023.antflix.net#240.92_(C))", + "displayTitle": "(C) Transformer Secondary Conductors of Separately Derived Systems", + "children": [ + { + "body": "The conductors shall be protected from short-circuit and ground-fault conditions by complying with one of the following conditions: The length of the secondary conductors does not exceed 30 m (100 ft), and the transformer primary overcurrent device has a rating or setting that does not exceed 150 percent of the value determined by multiplying the secondary conductor ampacity by the secondary-to-primary transformer voltage ratio.The conductors are protected by a differential relay with a trip setting equal to or less than the conductor ampacity.Informational Note: A differential relay is connected to be sensitive only to short-circuit or fault currents within the protected zone and is normally set much lower than the conductor ampacity. The differential relay is connected to trip protective devices that de-energize the protected conductors if a short-circuit condition occurs.The conductors shall be considered to be protected if calculations, made under engineering supervision, determine that the system overcurrent devices will protect the conductors within recognized time vs. current limits for all short-circuit and ground-fault conditions. [240.92_(C)_(1)](https://2023.antflix.net#240.92_(C)_(1))", + "displayTitle": "(1) Short-Circuit and Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#240.92_(C)_(1)" + }, + { + "body": "The conductors shall be protected against overload conditions by complying with one of the following: The conductors terminate in a single overcurrent device that will limit the load to the conductor ampacity.The sum of the overcurrent devices at the conductor termination limits the load to the conductor ampacity. The overcurrent devices shall consist of not more than six circuit breakers or sets of fuses mounted in a single enclosure, in a group of separate enclosures, or in or on a switchboard or switchgear. There shall be no more than six overcurrent devices grouped in any one location.Overcurrent relaying is connected [with a current transformer(s), if needed] to sense all of the secondary conductor current and limit the load to the conductor ampacity by opening upstream or downstream devices.Conductors shall be considered to be protected if calculations, made under engineering supervision, determine that the system overcurrent devices will protect the conductors from overload conditions. [240.92_(C)_(2)](https://2023.antflix.net#240.92_(C)_(2))", + "displayTitle": "(2) Overload Protection", + "children": [], + "url": "https://2023.antflix.net#240.92_(C)_(2)" + }, + { + "body": "The secondary conductors are protected from physical damage by being enclosed in an approved raceway or by other approved means. [240.92_(C)_(3)](https://2023.antflix.net#240.92_(C)_(3))", + "displayTitle": "(3) Physical Protection", + "children": [], + "url": "https://2023.antflix.net#240.92_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#240.92_(C)" + }, + { + "body": "Outside conductors shall be permitted to be tapped to a feeder or to be connected at a transformer secondary, without overcurrent protection at the tap or connection, where all the following conditions are met: The conductors are protected from physical damage in an approved manner.The sum of the overcurrent devices at the conductor termination limits the load to the conductor ampacity. The overcurrent devices shall consist of not more than six circuit breakers or sets of fuses mounted in a single enclosure, in a group of separate enclosures, or in or on a switchboard or switchgear. There shall be no more than six overcurrent devices grouped in any one location.The tap conductors are installed outdoors of a building or structure except at the point of load termination.The overcurrent device for the conductors is an integral part of a disconnecting means or is located immediately adjacent thereto.The disconnecting means for the conductors are installed at a readily accessible location complying with one of the following:Outside of a building or structureInside, nearest the point of entrance of the conductorsWhere installed in accordance with 230.6, nearest the point of entrance of the conductors [240.92_(D)](https://2023.antflix.net#240.92_(D))", + "displayTitle": "(D) Outside Feeder Taps", + "children": [], + "url": "https://2023.antflix.net#240.92_(D)" + }, + { + "body": "Conductors supplied by the secondary side of a transformer shall be permitted to be protected by overcurrent protection provided on the primary (supply) side of the transformer, provided the primary device time\u2014current protection characteristic, multiplied by the maximum effective primary-to-secondary transformer voltage ratio, effectively protects the secondary conductors. [240.92_(E)](https://2023.antflix.net#240.92_(E))", + "displayTitle": "(E) Protection by Primary Overcurrent Device", + "children": [], + "url": "https://2023.antflix.net#240.92_(E)" + } + ], + "url": "https://2023.antflix.net#240.92" + } + ], + "url": "https://2023.antflix.net#240" + }, + { + "displayTitle": "Article 242 Overvoltage Protection", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_7_I" + }, + { + "body": "This article provides the general requirements, installation requirements, and connection requirements for overvoltage protection and overvoltage protective devices. Part II covers surge-protective devices (SPDs) permanently installed on premises wiring systems of not more than 1000 volts, nominal, while Part III covers surge arresters permanently installed on premises wiring systems over 1000 volts, nominal. [242.1](https://2023.antflix.net#242.1)", + "displayTitle": "242.1 Scope", + "children": [], + "url": "https://2023.antflix.net#242.1" + }, + { + "body": "SPDs and surge arresters shall not be reconditioned. [242.2](https://2023.antflix.net#242.2)", + "displayTitle": "242.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#242.2" + }, + { + "body": "Equipment shall be protected against overvoltage in accordance with the article in this Code that covers the type of equipment or location specified in Table 242.3. Table 242.3 Other Articles Equipment Article Class I locations 501 Class II locations 502 Community antenna television and radio distribution systems 820 Critical operations power systems 708 Elevators, dumbwaiters, escalators, moving walks, platform lifts, and stairway chairlifts 620 Emergency systems 700 Equipment over 1000 volts, nominal 495 Fire pumps 695 Industrial machinery 670 Information technology equipment 645 Modular data centers 646 Outdoor overhead conductors over 1000 volts 395 Radio and television equipment 810 Receptacles, cord connectors, and attachment plugs (caps) 406 Wind electric systems 694 [242.3](https://2023.antflix.net#242.3)", + "displayTitle": "242.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#242.3" + }, + { + "displayTitle": "Part II Surge-Protective Devices (SPDs), 1000 Volts or Less", + "children": [], + "url": "https://2023.antflix.net#divider_7_II" + }, + { + "body": "An SPD shall be a listed device. [242.6](https://2023.antflix.net#242.6)", + "displayTitle": "242.6 Listing", + "children": [], + "url": "https://2023.antflix.net#242.6" + }, + { + "body": "The SPD shall be marked with a short-circuit current rating and shall not be installed at a point on the system where the available fault current is in excess of that rating. This marking requirement shall not apply to receptacles. [242.8](https://2023.antflix.net#242.8)", + "displayTitle": "242.8 Short-Circuit Current Rating", + "children": [], + "url": "https://2023.antflix.net#242.8" + }, + { + "body": "An SPD shall provide indication that it is functioning properly. [242.9](https://2023.antflix.net#242.9)", + "displayTitle": "242.9 Indicating", + "children": [], + "url": "https://2023.antflix.net#242.9" + }, + { + "body": "An SPD device shall not be installed in the following: Circuits over 1000 voltsOn ungrounded systems, impedance grounded systems, or corner grounded delta systems unless listed specifically for use on these systemsWhere the rating of the SPD is less than the maximum continuous phase-to-ground voltage at the power frequency available at the point of application [242.12](https://2023.antflix.net#242.12)", + "displayTitle": "242.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#242.12" + }, + { + "body": "Type 1 SPDs shall be installed in accordance with 242.13(A) and (B). [242.13](https://2023.antflix.net#242.13)", + "displayTitle": "242.13 Type 1 SPDs", + "children": [ + { + "body": "Type 1 SPDs shall be permitted to be connected in accordance with one of the following: To the supply side of the service disconnect as permitted in 230.82(4)As specified in 242.14 [242.13_(A)](https://2023.antflix.net#242.13_(A))", + "displayTitle": "(A) Installation", + "children": [], + "url": "https://2023.antflix.net#242.13_(A)" + }, + { + "body": "When installed at services, Type 1 SPDs shall be connected to one of the following: Grounded service conductorGrounding electrode conductorGrounding electrode for the serviceEquipment grounding terminal in the service equipment [242.13_(B)](https://2023.antflix.net#242.13_(B))", + "displayTitle": "(B) At the Service", + "children": [], + "url": "https://2023.antflix.net#242.13_(B)" + } + ], + "url": "https://2023.antflix.net#242.13" + }, + { + "body": "Type 2 SPDs shall be installed in accordance with 242.14(A) through (C). [242.14](https://2023.antflix.net#242.14)", + "displayTitle": "242.14 Type 2 SPDs", + "children": [ + { + "body": "Type 2 SPDs shall be connected anywhere on the load side of a service disconnect overcurrent device required in 230.91 unless installed in accordance with 230.82(8). [242.14_(A)](https://2023.antflix.net#242.14_(A))", + "displayTitle": "(A) Service-Supplied Building or Structure", + "children": [], + "url": "https://2023.antflix.net#242.14_(A)" + }, + { + "body": "Type 2 SPDs shall be connected at the building or structure anywhere on the load side of the first overcurrent device at the building or structure. [242.14_(B)](https://2023.antflix.net#242.14_(B))", + "displayTitle": "(B) Feeder-Supplied Building or Structure", + "children": [], + "url": "https://2023.antflix.net#242.14_(B)" + }, + { + "body": "The SPD shall be connected on the load side of the first overcurrent device in a separately derived system. [242.14_(C)](https://2023.antflix.net#242.14_(C))", + "displayTitle": "(C) Separately Derived System", + "children": [], + "url": "https://2023.antflix.net#242.14_(C)" + } + ], + "url": "https://2023.antflix.net#242.14" + }, + { + "body": "Type 3 SPDs shall be permitted to be installed on the load side of branch-circuit overcurrent protection up to the equipment served. If included in the manufacturer's instructions, the Type 3 SPD connection shall be a minimum 10 m (30 ft) of conductor distance from the service or separately derived system disconnect. [242.16](https://2023.antflix.net#242.16)", + "displayTitle": "242.16 Type 3 SPDs", + "children": [], + "url": "https://2023.antflix.net#242.16" + }, + { + "body": "Type 4 component assemblies and other component type SPDs shall only be installed by the equipment manufacturer. [242.18](https://2023.antflix.net#242.18)", + "displayTitle": "242.18 Type 4 and Other Component Type SPDs", + "children": [], + "url": "https://2023.antflix.net#242.18" + }, + { + "body": "Where used at a point on a circuit, the SPD shall be connected to each ungrounded conductor. [242.20](https://2023.antflix.net#242.20)", + "displayTitle": "242.20 Number Required", + "children": [], + "url": "https://2023.antflix.net#242.20" + }, + { + "body": "SPDs shall be permitted to be located indoors or outdoors and shall be made inaccessible to unqualified persons unless listed for installation in accessible locations. [242.22](https://2023.antflix.net#242.22)", + "displayTitle": "242.22 Location", + "children": [], + "url": "https://2023.antflix.net#242.22" + }, + { + "body": "The conductors used to connect the SPD to the line or bus and to ground shall not be any longer than necessary and shall avoid unnecessary bends. [242.24](https://2023.antflix.net#242.24)", + "displayTitle": "242.24 Routing of Conductors", + "children": [], + "url": "https://2023.antflix.net#242.24" + }, + { + "body": "SPD line conductors and conductors to ground shall not be smaller than 14 AWG copper or 12 AWG aluminum. [242.28](https://2023.antflix.net#242.28)", + "displayTitle": "242.28 Conductor Size", + "children": [], + "url": "https://2023.antflix.net#242.28" + }, + { + "body": "An SPD shall be permitted to be connected between any two conductors - ungrounded conductor(s), grounded conductor, equipment grounding conductor, or grounding electrode conductor. The grounded conductor and the equipment grounding conductor shall be interconnected only by the normal operation of the SPD during a surge. [242.30](https://2023.antflix.net#242.30)", + "displayTitle": "242.30 Connection Between Conductors", + "children": [], + "url": "https://2023.antflix.net#242.30" + }, + { + "body": "Except as indicated in this article, SPD grounding connections shall be made as specified in Article 250, Part III. Grounding electrode conductors installed in metal enclosures shall comply with 250.64(E). [242.32](https://2023.antflix.net#242.32)", + "displayTitle": "242.32 Grounding Electrode Conductor Connections and Enclosures", + "children": [], + "url": "https://2023.antflix.net#242.32" + }, + { + "displayTitle": "Part III Surge Arresters, Over 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#divider_6_III" + }, + { + "body": "A surge arrester shall not be installed where the rating of the surge arrester is less than the maximum continuous phase-to-ground voltage at the power frequency available at the point of application. [242.40](https://2023.antflix.net#242.40)", + "displayTitle": "242.40 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#242.40" + }, + { + "body": "The duty cycle rating of a surge arrester shall be not less than 125 percent of the maximum continuous operating voltage available at the point of application. For solidly grounded systems, the maximum continuous operating voltage shall be the phase-to-ground voltage of the system. For impedance or ungrounded systems, the maximum continuous operating voltage shall be the phase-to-phase voltage of the system. Informational Note No. 1: See IEEE C62.11-2020. Standard for Metal-Oxide Surge Arresters for Alternating-Current Power Circuits (>1 kV), and IEEE C62.22-2009, Guide for the Application of Metal-Oxide Surge Arresters for Alternating-Current Systems, for further information on surge arresters. Informational Note No. 2: The selection of a properly rated metal oxide arrester is based on considerations of maximum continuous operating voltage and the magnitude and duration of overvoltages at the arrester location as affected by phase-to-ground faults, system grounding techniques, switching surges, and other causes. See the manufacturer's application rules for selection of the specific arrester to be used at a particular location. [242.42](https://2023.antflix.net#242.42)", + "displayTitle": "242.42 Surge Arrester Rating", + "children": [], + "url": "https://2023.antflix.net#242.42" + }, + { + "body": "Where used at a point on a circuit, a surge arrester shall be connected to each ungrounded conductor. A single installation of such surge arresters shall be permitted to protect a number of interconnected circuits if no circuit is exposed to surges while disconnected from the surge arresters. [242.44](https://2023.antflix.net#242.44)", + "displayTitle": "242.44 Number Required", + "children": [], + "url": "https://2023.antflix.net#242.44" + }, + { + "body": "Surge arresters shall be permitted to be located indoors or outdoors. Surge arresters shall be made inaccessible to unqualified persons unless listed for installation in accessible locations. [242.46](https://2023.antflix.net#242.46)", + "displayTitle": "242.46 Location", + "children": [], + "url": "https://2023.antflix.net#242.46" + }, + { + "body": "The conductor used to connect the surge arrester to line, bus, or equipment and to an equipment grounding conductor or grounding electrode connection point as provided in 242.50 shall not be any longer than necessary and shall avoid unnecessary bends. [242.48](https://2023.antflix.net#242.48)", + "displayTitle": "242.48 Routing of Surge Arrester Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#242.48" + }, + { + "body": "The arrester shall be connected to one of the following: Grounded service conductorGrounding electrode conductorGrounding electrode for the serviceEquipment grounding terminal in the service equipment [242.50](https://2023.antflix.net#242.50)", + "displayTitle": "242.50 Connection", + "children": [], + "url": "https://2023.antflix.net#242.50" + }, + { + "body": "The conductor between the surge arrester and the line, and the surge arrester and the grounding connection, shall not be smaller than 6 AWG copper or aluminum. [242.52](https://2023.antflix.net#242.52)", + "displayTitle": "242.52 Surge-Arrester Conductors", + "children": [], + "url": "https://2023.antflix.net#242.52" + }, + { + "body": "The surge arrester protecting a transformer that supplies a secondary distribution system shall be interconnected as specified in 242.54(A), (B), or (C). [242.54](https://2023.antflix.net#242.54)", + "displayTitle": "242.54 Interconnections", + "children": [ + { + "body": "A metal interconnection shall be made to the secondary grounded circuit conductor or the secondary circuit grounding electrode conductor, if, in addition to the direct grounding connection at the surge arrester, the connection complies with 242.54(A)(1) or (A)(2). [242.54_(A)](https://2023.antflix.net#242.54_(A))", + "displayTitle": "(A) Metal Interconnections", + "children": [ + { + "body": "The grounded conductor of the secondary has a grounding connection elsewhere to a continuous metal underground water piping system. In urban water-pipe areas where there are at least four water-pipe connections on the neutral conductor and not fewer than four such connections in each mile of neutral conductor, the metal interconnection shall be permitted to be made to the secondary neutral conductor with omission of the direct grounding connection at the surge arrester. [242.54_(A)_(1)](https://2023.antflix.net#242.54_(A)_(1))", + "displayTitle": "(1) Additional Grounding Connection", + "children": [], + "url": "https://2023.antflix.net#242.54_(A)_(1)" + }, + { + "body": "The grounded conductor of the secondary system is part of a multigrounded neutral system or static wire of which the primary neutral conductor or static wire has at least four grounding connections in each 1.6 km (1 mile) of line in addition to a grounding connection at each service. [242.54_(A)_(2)](https://2023.antflix.net#242.54_(A)_(2))", + "displayTitle": "(2) Multigrounded Neutral System Connection", + "children": [], + "url": "https://2023.antflix.net#242.54_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#242.54_(A)" + }, + { + "body": "Where the surge arrester grounding electrode conductor is not connected as in 242.54(A), or where the secondary is not grounded as in 242.54(A) but is otherwise grounded as in 250.52, an interconnection shall be made through a spark gap or listed device as required by 242.54(B)(1) or (B)(2). [242.54_(B)](https://2023.antflix.net#242.54_(B))", + "displayTitle": "(B) Through Spark Gap or Device", + "children": [ + { + "body": "For ungrounded or unigrounded primary systems, the spark gap or a listed device shall have a 60-Hz breakdown voltage of at least twice the primary circuit voltage but not necessarily more than 10 kV, and there shall be at least one other ground on the grounded conductor of the secondary that is not less than 6.0 m (20 ft) distant from the surge-arrester grounding electrode. [242.54_(B)_(1)](https://2023.antflix.net#242.54_(B)_(1))", + "displayTitle": "(1) Ungrounded or Unigrounded Primary System", + "children": [], + "url": "https://2023.antflix.net#242.54_(B)_(1)" + }, + { + "body": "For multigrounded neutral primary systems, the spark gap or listed device shall have a 60-Hz breakdown of not more than 3 kV, and there shall be at least one other ground on the grounded conductor of the secondary that is not less than 6.0 m (20 ft) distant from the surge-arrester grounding electrode. [242.54_(B)_(2)](https://2023.antflix.net#242.54_(B)_(2))", + "displayTitle": "(2) Multigrounded Neutral Primary System", + "children": [], + "url": "https://2023.antflix.net#242.54_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#242.54_(B)" + }, + { + "body": "An interconnection of the surge-arrester ground and the secondary neutral conductor, other than as provided in 242.54(A) or (B), shall be permitted to be made only by special permission. [242.54_(C)](https://2023.antflix.net#242.54_(C))", + "displayTitle": "(C) By Special Permission", + "children": [], + "url": "https://2023.antflix.net#242.54_(C)" + } + ], + "url": "https://2023.antflix.net#242.54" + }, + { + "body": "Except as indicated in this article, surge-arrester grounding electrode conductor connections shall be made as specified in Article 250, Parts III and X. Grounding electrode conductors installed in metal enclosures shall comply with 250.64(E). [242.56](https://2023.antflix.net#242.56)", + "displayTitle": "242.56 Grounding Electrode Conductor Connections and Enclosures", + "children": [], + "url": "https://2023.antflix.net#242.56" + } + ], + "url": "https://2023.antflix.net#242" + }, + { + "displayTitle": "Article 245 Overcurrent Protection for Systems Rated Over 1000 Volts AC, 1500 Volts DC", + "children": [ + { + "body": "This article covers overcurrent protection requirements for systems over 1000 volts ac, 1500 volts dc, nominal. [245.1](https://2023.antflix.net#245.1)", + "displayTitle": "245.1 Scope", + "children": [], + "url": "https://2023.antflix.net#245.1" + }, + { + "displayTitle": "245.2 Reconditioned Equipment", + "children": [ + { + "body": "The following reconditioned equipment shall be permitted: Medium- and high-voltage circuit breakersElectromechanical protective relays and current transformers [245.2_(A)](https://2023.antflix.net#245.2_(A))", + "displayTitle": "(A) Reconditioned Equipment Permitted", + "children": [], + "url": "https://2023.antflix.net#245.2_(A)" + }, + { + "body": "Medium-voltage fuseholders and medium-voltage nonrenewable fuses shall not be permitted. [245.2_(B)](https://2023.antflix.net#245.2_(B))", + "displayTitle": "(B) Reconditioned Equipment Not Permitted", + "children": [], + "url": "https://2023.antflix.net#245.2_(B)" + } + ], + "url": "https://2023.antflix.net#245.2" + }, + { + "displayTitle": "245.21 Circuit-Interrupting Devices", + "children": [ + { + "displayTitle": "(A) Circuit Breakers", + "children": [ + { + "body": "Circuit breakers installed indoors shall be mounted either in metal-enclosed units or fire-resistant cell-mounted units, or they shall be permitted to be open-mounted in locations accessible to qualified persons only.Circuit breakers used to control oil-filled transformers in a vault shall either be located outside the transformer vault or be capable of operation from outside the vault.Oil circuit breakers shall be arranged or located so that adjacent readily combustible structures or materials are safeguarded in an approved manner. [245.21_(A)_(1)](https://2023.antflix.net#245.21_(A)_(1))", + "displayTitle": "(1) Location", + "children": [], + "url": "https://2023.antflix.net#245.21_(A)_(1)" + }, + { + "body": "Circuit breakers shall have the following equipment or operating characteristics: An accessible mechanical or other identified means for manual tripping, independent of control powerBe release free (trip free)If capable of being opened or closed manually while energized, main contacts that operate independently of the speed of the manual operationA mechanical position indicator at the circuit breaker to show the open or closed position of the main contactsA means of indicating the open and closed position of the breaker at the point(s) from which they may be operated [245.21_(A)_(2)](https://2023.antflix.net#245.21_(A)_(2))", + "displayTitle": "(2) Operating Characteristics", + "children": [], + "url": "https://2023.antflix.net#245.21_(A)_(2)" + }, + { + "body": "A circuit breaker shall have a permanent and legible nameplate showing the manufacturer's name or trademark, manufacturer's type or identification number, continuous current rating, interrupting rating in megavolt-amperes (MVA) or amperes, and maximum voltage rating. Modification of a circuit breaker affecting its rating(s) shall be accompanied by an appropriate change of nameplate information. [245.21_(A)_(3)](https://2023.antflix.net#245.21_(A)_(3))", + "displayTitle": "(3) Nameplate", + "children": [], + "url": "https://2023.antflix.net#245.21_(A)_(3)" + }, + { + "body": "Circuit breakers shall have the following ratings: The continuous current rating of a circuit breaker shall not be less than the maximum continuous current through the circuit breaker.The interrupting rating of a circuit breaker shall not be less than the available fault current the circuit breaker will be required to interrupt, including contributions from all connected sources of energy.The closing rating of a circuit breaker shall not be less than the maximum asymmetrical fault current into which the circuit breaker can be closed.The momentary rating of a circuit breaker shall not be less than the maximum asymmetrical fault current at the point of installation.The rated maximum voltage of a circuit breaker shall not be less than the maximum circuit voltage. [245.21_(A)_(4)](https://2023.antflix.net#245.21_(A)_(4))", + "displayTitle": "(4) Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(A)_(4)" + }, + { + "body": "Retrofit trip units shall be listed for use with the specific circuit breaker with which it is installed. [245.21_(A)_(5)](https://2023.antflix.net#245.21_(A)_(5))", + "displayTitle": "(5) Retrofit Trip Units", + "children": [], + "url": "https://2023.antflix.net#245.21_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#245.21_(A)" + }, + { + "displayTitle": "(B) Power Fuses and Fuseholders", + "children": [ + { + "body": "Where fuses are used to protect conductors and equipment, a fuse shall be placed in each ungrounded conductor. Two power fuses shall be permitted to be used in parallel to protect the same load if both fuses have identical ratings and both fuses are installed in an identified common mounting with electrical connections that divide the current equally. Power fuses of the vented type shall not be used indoors, underground, or in metal enclosures unless identified for the use. [245.21_(B)_(1)](https://2023.antflix.net#245.21_(B)_(1))", + "displayTitle": "(1) Use", + "children": [], + "url": "https://2023.antflix.net#245.21_(B)_(1)" + }, + { + "body": "The interrupting rating of power fuses shall not be less than the available fault current the fuse is required to interrupt, including contributions from all connected sources of energy. [245.21_(B)_(2)](https://2023.antflix.net#245.21_(B)_(2))", + "displayTitle": "(2) Interrupting Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(B)_(2)" + }, + { + "body": "The maximum voltage rating of power fuses shall not be less than the maximum circuit voltage. Fuses having a minimum recommended operating voltage shall not be applied below this voltage. [245.21_(B)_(3)](https://2023.antflix.net#245.21_(B)_(3))", + "displayTitle": "(3) Voltage Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(B)_(3)" + }, + { + "body": "Fuse mountings and fuse units shall have permanent and legible nameplates showing the manufacturer's type or designation, continuous current rating, interrupting current rating, and maximum voltage rating. [245.21_(B)_(4)](https://2023.antflix.net#245.21_(B)_(4))", + "displayTitle": "(4) Identification of Fuse Mountings and Fuse Units", + "children": [], + "url": "https://2023.antflix.net#245.21_(B)_(4)" + }, + { + "body": "Fuses that expel flame in opening the circuit shall be designed or arranged so that they function properly without hazard to persons or property. [245.21_(B)_(5)](https://2023.antflix.net#245.21_(B)_(5))", + "displayTitle": "(5) Fuses", + "children": [], + "url": "https://2023.antflix.net#245.21_(B)_(5)" + }, + { + "body": "Fuseholders shall be designed or installed so that they are de-energized while a fuse is being replaced. A field-applied permanent and legible sign, in accordance with 110.21(B), shall be installed immediately adjacent to the fuseholders and shall be worded as follows: DANGER - DISCONNECT CIRCUIT BEFORE REPLACING FUSES. Exception: Fuses and fuseholders designed to permit fuse replacement by qualified persons using identified equipment without de-energizing the fuseholder shall be permitted. [245.21_(B)_(6)](https://2023.antflix.net#245.21_(B)_(6))", + "displayTitle": "(6) Fuseholders,", + "children": [], + "url": "https://2023.antflix.net#245.21_(B)_(6)" + }, + { + "body": "Switchgear and substations that use high-voltage fuses shall be provided with a gang-operated disconnecting switch. Isolation of the fuses from the circuit shall be provided by either connecting a switch between the source and the fuses or providing roll-out switch and fuse-type construction. The switch shall be of the load-interrupter type, unless mechanically or electrically interlocked with a load-interrupting device arranged to reduce the load to the interrupting capability of the switch. Exception: More than one switch shall be permitted as the disconnecting means for one set of fuses where the switches are installed to provide connection to more than one set of supply conductors. The switches shall be mechanically or electrically interlocked to permit access to the fuses only when all switches are open. A conspicuous sign shall be placed at the fuses identifying the presence of more than one source. [245.21_(B)_(7)](https://2023.antflix.net#245.21_(B)_(7))", + "displayTitle": "(7) High-Voltage Fuses", + "children": [], + "url": "https://2023.antflix.net#245.21_(B)_(7)" + } + ], + "url": "https://2023.antflix.net#245.21_(B)" + }, + { + "displayTitle": "(C) Distribution Cutouts and Fuse Links - Expulsion Type", + "children": [ + { + "body": "Cutouts shall be located so that they may be readily and safely operated and re-fused, and so that the exhaust of the fuses does not endanger persons. Distribution cutouts shall not be used indoors, underground, or in metal enclosures. [245.21_(C)_(1)](https://2023.antflix.net#245.21_(C)_(1))", + "displayTitle": "(1) Installation", + "children": [], + "url": "https://2023.antflix.net#245.21_(C)_(1)" + }, + { + "body": "Where fused cutouts are not suitable to interrupt the circuit manually while carrying full load, an approved means shall be installed to interrupt the entire load. Unless the fused cutouts are interlocked with the switch to prevent opening of the cutouts under load, a conspicuous sign shall be placed at such cutouts identifying that they shall not be operated under load. [245.21_(C)_(2)](https://2023.antflix.net#245.21_(C)_(2))", + "displayTitle": "(2) Operation", + "children": [], + "url": "https://2023.antflix.net#245.21_(C)_(2)" + }, + { + "body": "The interrupting rating of distribution cutouts shall not be less than the available fault current the cutout is required to interrupt, including contributions from all connected sources of energy. [245.21_(C)_(3)](https://2023.antflix.net#245.21_(C)_(3))", + "displayTitle": "(3) Interrupting Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(C)_(3)" + }, + { + "body": "The maximum voltage rating of cutouts shall not be less than the maximum circuit voltage. [245.21_(C)_(4)](https://2023.antflix.net#245.21_(C)_(4))", + "displayTitle": "(4) Voltage Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(C)_(4)" + }, + { + "body": "Distribution cutouts shall have on their body, door, or fuse tube a permanent and legible nameplate or identification showing the manufacturer's type or designation, continuous current rating, maximum voltage rating, and interrupting rating. [245.21_(C)_(5)](https://2023.antflix.net#245.21_(C)_(5))", + "displayTitle": "(5) Identification", + "children": [], + "url": "https://2023.antflix.net#245.21_(C)_(5)" + }, + { + "body": "Fuse links shall have a permanent and legible identification showing continuous current rating and type. [245.21_(C)_(6)](https://2023.antflix.net#245.21_(C)_(6))", + "displayTitle": "(6) Fuse Links", + "children": [], + "url": "https://2023.antflix.net#245.21_(C)_(6)" + }, + { + "body": "The height of cutouts mounted outdoors on structures shall provide safe clearance between lowest energized parts (open or closed position) and standing surfaces, in accordance with 110.34(E). [245.21_(C)_(7)](https://2023.antflix.net#245.21_(C)_(7))", + "displayTitle": "(7) Structure Mounted Outdoors", + "children": [], + "url": "https://2023.antflix.net#245.21_(C)_(7)" + } + ], + "url": "https://2023.antflix.net#245.21_(C)" + }, + { + "displayTitle": "(D) Oil-Filled Cutouts", + "children": [ + { + "body": "The continuous current rating of oil-filled cutouts shall not be less than the maximum continuous current through the cutout. [245.21_(D)_(1)](https://2023.antflix.net#245.21_(D)_(1))", + "displayTitle": "(1) Continuous Current Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(D)_(1)" + }, + { + "body": "The interrupting rating of oil-filled cutouts shall not be less than the available fault current the oil-filled cutout is required to interrupt, including contributions from all connected sources of energy. [245.21_(D)_(2)](https://2023.antflix.net#245.21_(D)_(2))", + "displayTitle": "(2) Interrupting Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(D)_(2)" + }, + { + "body": "The maximum voltage rating of oil-filled cutouts shall not be less than the maximum circuit voltage. [245.21_(D)_(3)](https://2023.antflix.net#245.21_(D)_(3))", + "displayTitle": "(3) Voltage Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(D)_(3)" + }, + { + "body": "Oil-filled cutouts shall have a fault closing rating not less than the maximum asymmetrical fault current that can occur at the cutout location, unless suitable interlocks or operating procedures preclude the possibility of closing into a fault. [245.21_(D)_(4)](https://2023.antflix.net#245.21_(D)_(4))", + "displayTitle": "(4) Fault Closing Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(D)_(4)" + }, + { + "body": "Oil-filled cutouts shall have a permanent and legible nameplate showing the rated continuous current, rated maximum voltage, and rated interrupting current. [245.21_(D)_(5)](https://2023.antflix.net#245.21_(D)_(5))", + "displayTitle": "(5) Identification", + "children": [], + "url": "https://2023.antflix.net#245.21_(D)_(5)" + }, + { + "body": "Fuse links shall have a permanent and legible identification showing the rated continuous current. [245.21_(D)_(6)](https://2023.antflix.net#245.21_(D)_(6))", + "displayTitle": "(6) Fuse Links", + "children": [], + "url": "https://2023.antflix.net#245.21_(D)_(6)" + }, + { + "body": "Cutouts shall be located so that they are readily and safely accessible for re-fusing, with the top of the cutout not over 1.5 m (5 ft) above the floor or platform. [245.21_(D)_(7)](https://2023.antflix.net#245.21_(D)_(7))", + "displayTitle": "(7) Location", + "children": [], + "url": "https://2023.antflix.net#245.21_(D)_(7)" + }, + { + "body": "Suitable barriers or enclosures shall be provided to prevent contact with nonshielded cables or energized parts of oil-filled cutouts. [245.21_(D)_(8)](https://2023.antflix.net#245.21_(D)_(8))", + "displayTitle": "(8) Enclosure", + "children": [], + "url": "https://2023.antflix.net#245.21_(D)_(8)" + } + ], + "url": "https://2023.antflix.net#245.21_(D)" + }, + { + "body": "Load-interrupter switches shall be permitted if suitable fuses or circuit breakers are used in conjunction with these devices to interrupt available fault currents. Where these devices are used in combination, they shall be coordinated electrically so that they will safely withstand the effects of closing, carrying, or interrupting all possible currents up to the assigned maximum short-circuit rating. Where more than one switch is installed with interconnected load terminals to provide for alternate connection to different supply conductors, each switch shall be provided with a warning sign identifying the presence of more than one source. Each warning sign or label shall comply with 110.21. [245.21_(E)](https://2023.antflix.net#245.21_(E))", + "displayTitle": "(E) Load Interrupters", + "children": [ + { + "body": "The continuous current rating of interrupter switches shall equal or exceed the maximum continuous current at the point of installation. [245.21_(E)_(1)](https://2023.antflix.net#245.21_(E)_(1))", + "displayTitle": "(1) Continuous Current Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(E)_(1)" + }, + { + "body": "The maximum voltage rating of interrupter switches shall equal or exceed the maximum circuit voltage. [245.21_(E)_(2)](https://2023.antflix.net#245.21_(E)_(2))", + "displayTitle": "(2) Voltage Rating", + "children": [], + "url": "https://2023.antflix.net#245.21_(E)_(2)" + }, + { + "body": "Interrupter switches shall have a permanent and legible nameplate, including the following information: manufacturer's type or designation, continuous current rating, interrupting current rating, fault closing rating, maximum voltage rating. [245.21_(E)_(3)](https://2023.antflix.net#245.21_(E)_(3))", + "displayTitle": "(3) Identification", + "children": [], + "url": "https://2023.antflix.net#245.21_(E)_(3)" + }, + { + "body": "The switching mechanism shall be arranged to be operated from a location where the operator is not exposed to energized parts and shall be arranged to open all ungrounded conductors of the circuit simultaneously with one operation. Switches shall be arranged to be locked in the open position. Metal-enclosed switches shall be operable from outside the enclosure. [245.21_(E)_(4)](https://2023.antflix.net#245.21_(E)_(4))", + "displayTitle": "(4) Switching of Conductors", + "children": [], + "url": "https://2023.antflix.net#245.21_(E)_(4)" + }, + { + "body": "The stored-energy operator shall be permitted to be left in the uncharged position after the switch has been closed if a single movement of the operating handle charges the operator and opens the switch. [245.21_(E)_(5)](https://2023.antflix.net#245.21_(E)_(5))", + "displayTitle": "(5) Stored Energy for Opening", + "children": [], + "url": "https://2023.antflix.net#245.21_(E)_(5)" + }, + { + "body": "The supply terminals of fused interrupter switches shall be installed at the top of the switch enclosure, or, if the terminals are located elsewhere, the equipment shall have barriers installed to prevent persons from accidentally contacting energized parts or dropping tools or fuses into energized parts. [245.21_(E)_(6)](https://2023.antflix.net#245.21_(E)_(6))", + "displayTitle": "(6) Supply Terminals", + "children": [], + "url": "https://2023.antflix.net#245.21_(E)_(6)" + } + ], + "url": "https://2023.antflix.net#245.21_(E)" + } + ], + "url": "https://2023.antflix.net#245.21" + }, + { + "displayTitle": "245.26 Feeders and Branch Circuits", + "children": [ + { + "body": "Feeder and branch-circuit conductors shall have overcurrent protection in each ungrounded conductor located at the point where the conductor receives its supply or at an alternative location in the circuit when designed under engineering supervision that includes but is not limited to considering the appropriate fault studies and time-current coordination analysis of the protective devices and the conductor damage curves. The overcurrent protection shall be permitted to be provided by either 250.184(B) or (A)(2). [245.26_(A)](https://2023.antflix.net#245.26_(A))", + "displayTitle": "(A) Location and Type of Protection", + "children": [ + { + "body": "Circuit breakers used for overcurrent protection of 3-phase circuits shall have a minimum of three overcurrent relay elements operated from three current transformers. The separate overcurrent relay elements (or protective functions) shall be permitted to be part of a single electronic protective relay unit. On 3-phase, 3-wire circuits, an overcurrent relay element in the residual circuit of the current transformers shall be permitted to replace one of the phase relay elements. An overcurrent relay element, operated from a current transformer that links all phases of a 3-phase, 3-wire circuit, shall be permitted to replace the residual relay element and one of the phase-conductor current transformers. Where the neutral conductor is not regrounded on the load side of the circuit as permitted in 250.184(B), the current transformer shall be permitted to link all 3-phase conductors and the grounded circuit conductor (neutral). [245.26_(A)_(1)](https://2023.antflix.net#245.26_(A)_(1))", + "displayTitle": "(1) Overcurrent Relays and Current Transformers", + "children": [], + "url": "https://2023.antflix.net#245.26_(A)_(1)" + }, + { + "body": "A fuse shall be connected in series with each ungrounded conductor. [245.26_(A)_(2)](https://2023.antflix.net#245.26_(A)_(2))", + "displayTitle": "(2) Fuses", + "children": [], + "url": "https://2023.antflix.net#245.26_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#245.26_(A)" + }, + { + "body": "The protective device(s) shall be capable of detecting and interrupting all values of current that can occur at their location in excess of their trip-setting or melting point. [245.26_(B)](https://2023.antflix.net#245.26_(B))", + "displayTitle": "(B) Protective Devices", + "children": [], + "url": "https://2023.antflix.net#245.26_(B)" + }, + { + "body": "The operating time of the protective device, the available short-circuit current, and the conductor used shall be coordinated to prevent damaging or dangerous temperatures in conductors or conductor insulation under short-circuit conditions. [245.26_(C)](https://2023.antflix.net#245.26_(C))", + "displayTitle": "(C) Conductor Protection", + "children": [], + "url": "https://2023.antflix.net#245.26_(C)" + } + ], + "url": "https://2023.antflix.net#245.26" + }, + { + "displayTitle": "245.27 Additional Requirements for Feeders", + "children": [ + { + "body": "The continuous ampere rating of a fuse shall not exceed three times the ampacity of the conductors. The long-time trip element setting of a breaker or the minimum trip setting of an electronically actuated fuse shall not exceed six times the ampacity of the conductor. For fire pumps, conductors shall be permitted to be protected for overcurrent in accordance with 695.4(B)(2). [245.27_(A)](https://2023.antflix.net#245.27_(A))", + "displayTitle": "(A) Rating or Setting of Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#245.27_(A)" + }, + { + "body": "Conductors tapped to a feeder shall be permitted to be protected by the feeder overcurrent device where that overcurrent device also protects the tap conductor. [245.27_(B)](https://2023.antflix.net#245.27_(B))", + "displayTitle": "(B) Feeder Taps", + "children": [], + "url": "https://2023.antflix.net#245.27_(B)" + } + ], + "url": "https://2023.antflix.net#245.27" + } + ], + "url": "https://2023.antflix.net#245" + }, + { + "displayTitle": "Article 250 Grounding and Bonding", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_8_I" + }, + { + "body": "This article covers general requirements for grounding and bonding of electrical installations and the following specific requirements: Systems, circuits, and equipment required, permitted, or not permitted to be groundedCircuit conductor to be grounded on grounded systemsLocation of grounding connectionsTypes and sizes of grounding and bonding conductors and electrodesMethods of grounding and bondingConditions under which isolation, insulation, or guards are permitted to be substituted for groundingInformational Note: See Informational Note Figure 250.1 for information on the organization of this article covering grounding and bonding requirements.Informational Note Figure 250.1 Grounding and Bonding. [250.1](https://2023.antflix.net#250.1)", + "displayTitle": "250.1 Scope", + "children": [], + "url": "https://2023.antflix.net#250.1" + }, + { + "body": "The following general requirements identify what grounding and bonding of electrical systems are required to accomplish. The prescriptive methods contained in this article shall be followed to comply with the performance requirements of this section. [250.4](https://2023.antflix.net#250.4)", + "displayTitle": "250.4 General Requirements for Grounding and Bonding", + "children": [ + { + "displayTitle": "(A) Grounded Systems", + "children": [ + { + "body": "Electrical systems that are grounded shall be connected to earth in a manner that will limit the voltage imposed by lightning, line surges, or unintentional contact with higher-voltage lines and that will stabilize the voltage to earth during normal operation. Informational Note No. 1: An important consideration for limiting the imposed voltage is the routing of bonding and grounding electrode conductors so that they are not any longer than necessary to complete the connection without disturbing the permanent parts of the installation and so that unnecessary bends and loops are avoided. Informational Note No. 2: See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, for information on installation of grounding and bonding for lightning protection systems. [250.4_(A)_(1)](https://2023.antflix.net#250.4_(A)_(1))", + "displayTitle": "(1) Electrical System Grounding", + "children": [], + "url": "https://2023.antflix.net#250.4_(A)_(1)" + }, + { + "body": "Normally noncurrent-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected to earth so as to limit the voltage to ground on these materials. [250.4_(A)_(2)](https://2023.antflix.net#250.4_(A)_(2))", + "displayTitle": "(2) Grounding of Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#250.4_(A)_(2)" + }, + { + "body": "Normally non-current-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected together and to the electrical supply source in a manner that establishes an effective ground-fault current path. [250.4_(A)_(3)](https://2023.antflix.net#250.4_(A)_(3))", + "displayTitle": "(3) Bonding of Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#250.4_(A)_(3)" + }, + { + "body": "Normally non-current-carrying electrically conductive materials that are likely to become energized shall be connected together and to the electrical supply source in a manner that establishes an effective ground-fault current path. [250.4_(A)_(4)](https://2023.antflix.net#250.4_(A)_(4))", + "displayTitle": "(4) Bonding of Electrically Conductive Materials and Other Equipment", + "children": [], + "url": "https://2023.antflix.net#250.4_(A)_(4)" + }, + { + "body": "Electrical equipment and wiring and other electrically conductive material likely to become energized shall be installed in a manner that creates a low-impedance circuit facilitating the operation of the overcurrent device or ground detector for impedance grounded systems. It shall be capable of safely carrying the maximum ground-fault current likely to be imposed on it from any point on the wiring system where a ground fault occurs to the electrical supply source. The earth shall not be considered as an effective ground-fault current path. [250.4_(A)_(5)](https://2023.antflix.net#250.4_(A)_(5))", + "displayTitle": "(5) Effective Ground-Fault Current Path", + "children": [], + "url": "https://2023.antflix.net#250.4_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#250.4_(A)" + }, + { + "displayTitle": "(B) Ungrounded Systems", + "children": [ + { + "body": "Non-current-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected to earth in a manner that will limit the voltage imposed by lightning or unintentional contact with higher-voltage lines and limit the voltage to ground on these materials. Informational Note: See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, for information on installation of grounding and bonding for lightning protection systems. [250.4_(B)_(1)](https://2023.antflix.net#250.4_(B)_(1))", + "displayTitle": "(1) Grounding Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#250.4_(B)_(1)" + }, + { + "body": "Non-current-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected together and to the supply system grounded equipment in a manner that creates a low-impedance path for ground-fault current that is capable of carrying the maximum fault current likely to be imposed on it. [250.4_(B)_(2)](https://2023.antflix.net#250.4_(B)_(2))", + "displayTitle": "(2) Bonding of Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#250.4_(B)_(2)" + }, + { + "body": "Electrically conductive materials that are likely to become energized shall be connected together and to the supply system grounded equipment in a manner that creates a low-impedance path for ground-fault current that is capable of carrying the maximum fault current likely to be imposed on it. [250.4_(B)_(3)](https://2023.antflix.net#250.4_(B)_(3))", + "displayTitle": "(3) Bonding of Electrically Conductive Materials and Other Equipment", + "children": [], + "url": "https://2023.antflix.net#250.4_(B)_(3)" + }, + { + "body": "Electrical equipment, wiring, and other electrically conductive material likely to become energized shall be installed in a manner that creates a low-impedance circuit from any point on the wiring system to the electrical supply source to facilitate the operation of overcurrent devices should a second ground fault from a different phase occur on the wiring system. The earth shall not be considered as an effective fault-current path. [250.4_(B)_(4)](https://2023.antflix.net#250.4_(B)_(4))", + "displayTitle": "(4) Path for Fault Current", + "children": [], + "url": "https://2023.antflix.net#250.4_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#250.4_(B)" + } + ], + "url": "https://2023.antflix.net#250.4" + }, + { + "displayTitle": "250.6 Objectionable Current", + "children": [ + { + "body": "The grounding and bonding of electrical systems, circuit conductors, surge arresters, surge-protective devices, and conductive normally non-current-carrying metal parts of equipment shall be installed and arranged in a manner that will prevent objectionable current. [250.6_(A)](https://2023.antflix.net#250.6_(A))", + "displayTitle": "(A) Arrangement to Prevent Objectionable Current", + "children": [], + "url": "https://2023.antflix.net#250.6_(A)" + }, + { + "body": "If the use of multiple grounding or bonding connections results in objectionable current and the requirements of 250.4(A)(5) or (B)(4) are met, one or more of the following alterations shall be permitted: Discontinue one or more but not all of such grounding or bonding connections.Change the locations of the grounding or bonding connections.Interrupt the continuity of the conductor or conductive path causing the objectionable current.Take other remedial and approved action. [250.6_(B)](https://2023.antflix.net#250.6_(B))", + "displayTitle": "(B) Alterations to Stop Objectionable Current", + "children": [], + "url": "https://2023.antflix.net#250.6_(B)" + }, + { + "body": "Currents resulting from abnormal conditions such as ground faults, and from currents resulting from required grounding and bonding connections shall not be classified as objectionable current for the purposes specified in 250.6(A) and (B). [250.6_(C)](https://2023.antflix.net#250.6_(C))", + "displayTitle": "(C) Currents Not Classified as Objectionable Currents", + "children": [], + "url": "https://2023.antflix.net#250.6_(C)" + }, + { + "body": "This section shall not be considered as permitting electronic equipment to be operated on ac systems or branch circuits that are not connected to an equipment grounding conductor as required by this article. Currents that introduce electromagnetic interference or data errors in electronic equipment shall not be considered the objectionable currents addressed in this section. [250.6_(D)](https://2023.antflix.net#250.6_(D))", + "displayTitle": "(D) Limitations to Permissible Alterations", + "children": [], + "url": "https://2023.antflix.net#250.6_(D)" + }, + { + "body": "If isolation of objectionable direct currents from a cathodic protection system is required, a listed isolator device shall be permitted in the equipment grounding conductor path to provide an effective return path for ac ground-fault current while blocking the flow of direct currents. [250.6_(E)](https://2023.antflix.net#250.6_(E))", + "displayTitle": "(E) Isolation of Objectionable Direct-Current From Cathodic Protection Systems", + "children": [], + "url": "https://2023.antflix.net#250.6_(E)" + } + ], + "url": "https://2023.antflix.net#250.6" + }, + { + "displayTitle": "250.8 Connection of Grounding and Bonding Equipment", + "children": [ + { + "body": "Equipment grounding conductors, grounding electrode conductors, and bonding jumpers shall be connected by one or more of the following means: Listed pressure connectorsTerminal barsPressure connectors listed as grounding and bonding equipmentExothermic welding processMachine screw-type fasteners that engage not less than two threads or are secured with a nutThread-forming machine screws that engage not less than two threads in the enclosureConnections that are part of a listed assemblyOther listed means [250.8_(A)](https://2023.antflix.net#250.8_(A))", + "displayTitle": "(A) Permitted Methods", + "children": [], + "url": "https://2023.antflix.net#250.8_(A)" + }, + { + "body": "Connection devices or fittings that depend solely on solder shall not be used. [250.8_(B)](https://2023.antflix.net#250.8_(B))", + "displayTitle": "(B) Methods Not Permitted", + "children": [], + "url": "https://2023.antflix.net#250.8_(B)" + } + ], + "url": "https://2023.antflix.net#250.8" + }, + { + "body": "Ground clamps or other fittings exposed to physical damage shall be enclosed in metal, wood, or equivalent protective covering. [250.10](https://2023.antflix.net#250.10)", + "displayTitle": "250.10 Protection of Ground Clamps and Fittings", + "children": [], + "url": "https://2023.antflix.net#250.10" + }, + { + "body": "Nonconductive coatings (such as paint, lacquer, and enamel) on equipment to be grounded or bonded shall be removed from threads and other contact surfaces to ensure electrical continuity or shall be connected by means of fittings designed to make such removal unnecessary. [250.12](https://2023.antflix.net#250.12)", + "displayTitle": "250.12 Clean Surfaces", + "children": [], + "url": "https://2023.antflix.net#250.12" + }, + { + "displayTitle": "Part II System Grounding", + "children": [], + "url": "https://2023.antflix.net#divider_8_II" + }, + { + "body": "Alternating-current systems shall be grounded in accordance with 250.20(A), (B), (C), or (D), unless prohibited elsewhere in this Code. Other systems shall be permitted to be grounded. If such systems are grounded, they shall comply with the applicable provisions of this article. Informational Note No. 1: An example of a system permitted to be grounded is a corner-grounded delta transformer connection. Informational Note No. 2: See 503.155, 517.61, 517.160, 668.10, and 680.23(A)(2) for examples of circuits prohibited to be grounded. [250.20](https://2023.antflix.net#250.20)", + "displayTitle": "250.20 Alternating-Current Systems to Be Grounded", + "children": [ + { + "body": "Alternating-current systems of less than 50 volts shall be grounded under any of the following conditions: If supplied by transformers, if the transformer supply system exceeds 150 volts to groundIf supplied by transformers, if the transformer supply system is ungroundedIf installed outside as overhead conductors [250.20_(A)](https://2023.antflix.net#250.20_(A))", + "displayTitle": "(A) Alternating-Current Systems of Less Than 50 Volts", + "children": [], + "url": "https://2023.antflix.net#250.20_(A)" + }, + { + "body": "Alternating-current systems of 50 volts to 1000 volts that supply premises wiring and premises wiring systems shall be grounded under any of the following conditions: If the system can be grounded so that the maximum voltage to ground on the ungrounded conductors does not exceed 150 voltsIf the system is 3-phase, 4-wire, wye connected in which the neutral conductor is used as a circuit conductorIf the system is 3-phase, 4-wire, delta connected in which the midpoint of one phase winding is used as a circuit conductorInformational Note: See NFPA 70E-2021. Standard for Electrical Safety in the Workplace, Annex O, for information on impedance grounding to reduce arc-flash hazards. [250.20_(B)](https://2023.antflix.net#250.20_(B))", + "displayTitle": "(B) Alternating-Current Systems of 50 Volts to 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#250.20_(B)" + }, + { + "body": "Alternating-current systems supplying mobile or portable equipment shall be grounded in accordance with 250.188. If supplying other than mobile or portable equipment, such systems shall be permitted to be grounded. [250.20_(C)](https://2023.antflix.net#250.20_(C))", + "displayTitle": "(C) Alternating-Current Systems of Over 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#250.20_(C)" + }, + { + "body": "Impedance grounded systems shall be grounded in accordance with 250.36 or 250.187, as applicable. [250.20_(D)](https://2023.antflix.net#250.20_(D))", + "displayTitle": "(D) Impedance Grounded Systems", + "children": [], + "url": "https://2023.antflix.net#250.20_(D)" + } + ], + "url": "https://2023.antflix.net#250.20" + }, + { + "displayTitle": "250.21 Alternating-Current Systems of 50 Volts to 1000 Volts Not Required to Be Grounded", + "children": [ + { + "body": "The following ac systems of 50 volts to 1000 volts shall be permitted to be grounded but shall not be required to be grounded: Electrical systems used exclusively to supply industrial electric furnaces used for applications such as melting, refining, or temperingSeparately derived systems used exclusively for rectifiers that supply only adjustable-speed industrial drivesSeparately derived systems supplied by transformers that have a primary voltage rating of 1000 volts or less if all the following conditions are met:The system is used exclusively for control circuits.The conditions of maintenance and supervision ensure that only qualified persons service the installation.Continuity of control power is required.Other systems that are not required to be grounded in accordance with 250.20(B) [250.21_(A)](https://2023.antflix.net#250.21_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#250.21_(A)" + }, + { + "body": "Ground detectors shall be installed in accordance with the following: Ungrounded ac systems as permitted in 250.21(A)(1) through (A)(4) operating at not less than 120 volts and at 1000 volts or less shall have ground detectors installed on the system.The ground detection sensing equipment shall be connected as close as practicable to where the system receives its supply. [250.21_(B)](https://2023.antflix.net#250.21_(B))", + "displayTitle": "(B) Ground Detectors", + "children": [], + "url": "https://2023.antflix.net#250.21_(B)" + }, + { + "body": "Ungrounded systems shall be legibly marked \"Caution: Ungrounded System Operating - ____ Volts Between Conductors\" at the source or first disconnecting means of the system. The marking shall be of sufficient durability to withstand the environment involved. [250.21_(C)](https://2023.antflix.net#250.21_(C))", + "displayTitle": "(C) Marking", + "children": [], + "url": "https://2023.antflix.net#250.21_(C)" + } + ], + "url": "https://2023.antflix.net#250.21" + }, + { + "displayTitle": "250.24 Grounding of Service-Supplied Alternating-Current Systems", + "children": [ + { + "body": "A premises wiring system supplied by a grounded ac service shall have a grounding electrode conductor connected to the grounded service conductor, at each service, in accordance with 250.24(A)(1) through (A)(4). [250.24_(A)](https://2023.antflix.net#250.24_(A))", + "displayTitle": "(A) System Grounding Connections", + "children": [ + { + "body": "The grounding electrode conductor connection shall be made at any accessible point from the load end of the overhead service conductors, service drop, underground service conductors, or service lateral to the terminal or bus to which the grounded service conductor is connected at the service disconnecting means. Informational Note: See Article 100 for definitions of Service Conductors, Overhead; Service Conductors, Underground; Service Drop; and Service Lateral. [250.24_(A)_(1)](https://2023.antflix.net#250.24_(A)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#250.24_(A)_(1)" + }, + { + "body": "If the transformer supplying the service is located outside the building, at least one additional grounding connection shall be made from the grounded service conductor to a grounding electrode, either at the transformer or elsewhere outside the building. Exception: The additional grounding electrode conductor connection shall not be made on impedance grounded systems. Impedance grounded systems shall meet the requirements of 250.36 or 250.187, as applicable. [250.24_(A)_(2)](https://2023.antflix.net#250.24_(A)_(2))", + "displayTitle": "(2) Outdoor Transformer", + "children": [], + "url": "https://2023.antflix.net#250.24_(A)_(2)" + }, + { + "body": "For services that are dual fed (double ended) in a common enclosure or grouped together in separate enclosures and employing a secondary tie, a single grounding electrode conductor connection to the tie point of the grounded conductor(s) from each power source shall be permitted. [250.24_(A)_(3)](https://2023.antflix.net#250.24_(A)_(3))", + "displayTitle": "(3) Dual-Fed Services", + "children": [], + "url": "https://2023.antflix.net#250.24_(A)_(3)" + }, + { + "body": "If the main bonding jumper specified in 250.28 is a wire or busbar and is installed from the grounded conductor terminal bar or bus to the equipment grounding terminal bar or bus in the service equipment, the grounding electrode conductor shall be permitted to be connected to the equipment grounding terminal, bar, or bus to which the main bonding jumper is connected. [250.24_(A)_(4)](https://2023.antflix.net#250.24_(A)_(4))", + "displayTitle": "(4) Main Bonding Jumper as Wire or Busbar", + "children": [], + "url": "https://2023.antflix.net#250.24_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#250.24_(A)" + }, + { + "body": "A grounded conductor shall not be connected to normally non-current-carrying metal parts of equipment, to equipment grounding conductor(s), or be reconnected to ground on the load side of the service disconnecting means except as otherwise permitted in this article. Informational Note: See 250.30 for separately derived systems, 250.32 for connections at separate buildings or structures, and 250.142 for use of the grounded circuit conductor for grounding equipment. [250.24_(B)](https://2023.antflix.net#250.24_(B))", + "displayTitle": "(B) Load-Side Grounding Connections", + "children": [], + "url": "https://2023.antflix.net#250.24_(B)" + }, + { + "body": "For a grounded system, an unspliced main bonding jumper shall be used to connect the equipment grounding conductor(s) and the service-disconnect enclosure to the grounded conductor within the enclosure for each service disconnect in accordance with 250.28. Exception No. 1: If more than one service disconnecting means is located in an assembly listed for use as service equipment, an unspliced main bonding jumper shall bond the grounded conductor(s) to the assembly enclosure. Exception No. 2: Impedance grounded systems shall be permitted to be connected in accordance with 250.36 and 250.187. [250.24_(C)](https://2023.antflix.net#250.24_(C))", + "displayTitle": "(C) Main Bonding Jumper", + "children": [], + "url": "https://2023.antflix.net#250.24_(C)" + }, + { + "body": "If an ac system operating at 1000 volts or less is grounded at any point, the grounded conductor(s) shall be routed with the ungrounded conductors to each service disconnecting means and shall be connected to each disconnecting means grounded conductor(s) terminal or bus. A main bonding jumper shall connect the grounded conductor(s) to each service disconnecting means enclosure. The grounded conductor(s) shall be installed in accordance with 250.24(D)(1) through (D)(4).\nException: If two or more service disconnecting means are located in a single assembly listed for use as service equipment, it shall be permitted to connect the grounded conductor(s) to the assembly common grounded conductor(s) terminal or bus. The assembly shall include a main bonding jumper for connecting the grounded conductor(s) to the assembly enclosure. [250.24_(D)](https://2023.antflix.net#250.24_(D))", + "displayTitle": "(D) Grounded Conductor Brought to Service Equipment", + "children": [ + { + "body": "The grounded conductor shall not be smaller than specified in Table 250.102(C)(1). [250.24_(D)_(1)](https://2023.antflix.net#250.24_(D)_(1))", + "displayTitle": "(1) Sizing for a Single Raceway or Cable", + "children": [], + "url": "https://2023.antflix.net#250.24_(D)_(1)" + }, + { + "body": "If the ungrounded service-entrance conductors are connected in parallel in two or more raceways or cables, the grounded conductors shall also be installed in each raceway or cable and shall be connected in parallel. The size of each grounded conductor(s) in each raceway or cable shall not be smaller than 1/0 AWG and shall be sized in accordance with 250.24(D)(2)(a) or (D)(2)(b) in accordance with 250.24(D)(1). Shall be based on the largest ungrounded conductor in each raceway or cable.Shall be based on the sum of the circular mil areas of the largest ungrounded conductors from each set connected in parallel in each raceway or cable.Informational Note: See 310.10(G) for grounded conductors connected in parallel. [250.24_(D)_(2)](https://2023.antflix.net#250.24_(D)_(2))", + "displayTitle": "(2) Conductors Connected in Parallel in Two or More Raceways or Cables", + "children": [], + "url": "https://2023.antflix.net#250.24_(D)_(2)" + }, + { + "body": "The grounded conductor of a 3-phase, 3-wire delta service shall have an ampacity not less than that of the ungrounded conductors. [250.24_(D)_(3)](https://2023.antflix.net#250.24_(D)_(3))", + "displayTitle": "(3) Delta-Connected Service", + "children": [], + "url": "https://2023.antflix.net#250.24_(D)_(3)" + }, + { + "body": "The impedance grounding conductor on an impedance grounded system shall be connected in accordance with 250.36 or 250.187, as applicable. [250.24_(D)_(4)](https://2023.antflix.net#250.24_(D)_(4))", + "displayTitle": "(4) Impedance Grounded Service", + "children": [], + "url": "https://2023.antflix.net#250.24_(D)_(4)" + } + ], + "url": "https://2023.antflix.net#250.24_(D)" + }, + { + "body": "A grounding electrode conductor shall be used to connect the equipment grounding conductors, the service-equipment enclosures, and, if the system is grounded, the grounded service conductor to the grounding electrode(s) required by Part III of this article. This conductor shall be sized in accordance with 250.66. Impedance grounded system connections shall be made in accordance with 250.36 or 250.187, as applicable. [250.24_(E)](https://2023.antflix.net#250.24_(E))", + "displayTitle": "(E) Grounding Electrode Conductor", + "children": [], + "url": "https://2023.antflix.net#250.24_(E)" + }, + { + "body": "A premises wiring system that is supplied by an ac service that is ungrounded shall have, at each service, a grounding electrode conductor connected to the grounding electrode(s) required by Part III of this article. The grounding electrode conductor shall be connected to a metal enclosure of the service conductors at any accessible point from the load end of the overhead service conductors, service drop, underground service conductors, or service lateral to the service disconnecting means. [250.24_(F)](https://2023.antflix.net#250.24_(F))", + "displayTitle": "(F) Ungrounded System Grounding Connections", + "children": [], + "url": "https://2023.antflix.net#250.24_(F)" + } + ], + "url": "https://2023.antflix.net#250.24" + }, + { + "body": "The grounding of systems connected on the supply side of the service disconnect, in accordance with 230.82, that are in enclosures separate from the service equipment enclosure shall comply with 250.25(A) or (B). [250.25](https://2023.antflix.net#250.25)", + "displayTitle": "250.25 Grounding of Systems Permitted to Be Connected on the Supply Side of the Service Disconnect", + "children": [ + { + "body": "If the utility supply system is grounded, the grounding of systems permitted to be connected on the supply side of the service disconnect and are installed in one or more separate enclosures from the service equipment enclosure shall comply with the requirements of 250.24(A) through (D). [250.25_(A)](https://2023.antflix.net#250.25_(A))", + "displayTitle": "(A) Grounded System", + "children": [], + "url": "https://2023.antflix.net#250.25_(A)" + }, + { + "body": "If the utility supply system is ungrounded, the grounding of systems permitted to be connected on the supply side of the service disconnect and are installed in one or more separate enclosures from the service equipment enclosure shall comply with the requirements of 250.24(F). [250.25_(B)](https://2023.antflix.net#250.25_(B))", + "displayTitle": "(B) Ungrounded Systems", + "children": [], + "url": "https://2023.antflix.net#250.25_(B)" + } + ], + "url": "https://2023.antflix.net#250.25" + }, + { + "body": "If an ac premises wiring system is grounded, the conductor to be grounded shall be one of the following: Single-phase, 2-wire - one conductorSingle-phase, 3-wire - the neutral conductorMultiphase systems having one wire common to all phases - the neutral conductorMultiphase systems if one phase is grounded - that phase conductorMultiphase systems in which one phase is used as in (2) - the neutral conductor [250.26](https://2023.antflix.net#250.26)", + "displayTitle": "250.26 Conductor to Be Grounded - Alternating-Current Systems", + "children": [], + "url": "https://2023.antflix.net#250.26" + }, + { + "body": "For a grounded system, main bonding jumpers and system bonding jumpers shall be installed as follows: [250.28](https://2023.antflix.net#250.28)", + "displayTitle": "250.28 Main Bonding Jumper and System Bonding Jumper", + "children": [ + { + "body": "Main bonding jumpers and system bonding jumpers shall be of copper, aluminum, copper-clad aluminum, or other corrosion-resistant material. A main bonding jumper and a system bonding jumper shall be a wire, bus, screw, or similar suitable conductor. [250.28_(A)](https://2023.antflix.net#250.28_(A))", + "displayTitle": "(A) Material", + "children": [], + "url": "https://2023.antflix.net#250.28_(A)" + }, + { + "body": "If a main bonding jumper or a system bonding jumper is a screw only, the screw shall be identified with a green finish that shall be visible with the screw installed. [250.28_(B)](https://2023.antflix.net#250.28_(B))", + "displayTitle": "(B) Construction", + "children": [], + "url": "https://2023.antflix.net#250.28_(B)" + }, + { + "body": "Main bonding jumpers and system bonding jumpers shall be connected by one or more of the methods in 250.8 that is suitable for the material of the bonding jumper and enclosure. [250.28_(C)](https://2023.antflix.net#250.28_(C))", + "displayTitle": "(C) Attachment", + "children": [], + "url": "https://2023.antflix.net#250.28_(C)" + }, + { + "body": "Main bonding jumpers and system bonding jumpers shall be sized in accordance with 250.28(D)(1) through (D)(3). [250.28_(D)](https://2023.antflix.net#250.28_(D))", + "displayTitle": "(D) Size", + "children": [ + { + "body": "Main bonding jumpers and system bonding jumpers shall not be smaller than specified in Table 250.102(C)(1). [250.28_(D)_(1)](https://2023.antflix.net#250.28_(D)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#250.28_(D)_(1)" + }, + { + "body": "If a service consists of more than a single enclosure as permitted in 230.71(B), the main bonding jumper for each enclosure shall be sized in accordance with 250.28(D)(1) based on the largest ungrounded service conductor serving that enclosure. [250.28_(D)_(2)](https://2023.antflix.net#250.28_(D)_(2))", + "displayTitle": "(2) Main Bonding Jumper for Service With More Than One Enclosure", + "children": [], + "url": "https://2023.antflix.net#250.28_(D)_(2)" + }, + { + "body": "If a separately derived system supplies more than a single enclosure, the system bonding jumper for each enclosure shall be sized in accordance with 250.28(D)(1) based on the largest ungrounded feeder conductor serving that enclosure, or a single system bonding jumper shall be installed at the source and sized in accordance with 250.28(D)(1) based on the equivalent size of the largest supply conductor determined by the largest sum of the areas of the corresponding conductors of each set. [250.28_(D)_(3)](https://2023.antflix.net#250.28_(D)_(3))", + "displayTitle": "(3) Separately Derived System With More Than One Enclosure", + "children": [], + "url": "https://2023.antflix.net#250.28_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#250.28_(D)" + } + ], + "url": "https://2023.antflix.net#250.28" + }, + { + "body": "In addition to complying with 250.30(A) for grounded systems, or as provided in 250.30(B) for ungrounded systems, separately derived systems shall comply with 250.20, 250.21, or 250.26, as applicable. Multiple power sources of the same type that are connected in parallel to form one system that supplies premises wiring shall be treated as a single separately derived system and shall be installed in accordance with 250.30. Informational Note No. 1: An alternate ac power source, such as an on-site generator, is not a separately derived system if the grounded conductor is solidly interconnected to a service-supplied system grounded conductor. An example of such a situation is if the alternate source transfer equipment does not include a switching action in the grounded conductor and allows it to remain solidly connected to the service-supplied grounded conductor when the alternate source is operational and supplying the load served. Informational Note No. 2: See 445.13 for the minimum size of conductors that carry fault current. [250.30](https://2023.antflix.net#250.30)", + "displayTitle": "250.30 Grounding Separately Derived Alternating-Current Systems", + "children": [ + { + "body": "A separately derived ac system that is grounded shall comply with 250.30(A)(1) through (A)(8). Except as otherwise permitted in this article, a grounded conductor shall not be connected to normally non-current-carrying metal parts of equipment, be connected to equipment grounding conductors, or be reconnected to ground on the load side of the system bonding jumper. Informational Note: See 250.32 for connections at separate buildings or structures and 250.142 for use of the grounded circuit conductor for grounding equipment. Exception: Impedance grounded system grounding connections shall be made in accordance with 250.36 or 250.187, as applicable. [250.30_(A)](https://2023.antflix.net#250.30_(A))", + "displayTitle": "(A) Grounded Systems", + "children": [ + { + "body": "An unspliced system bonding jumper shall comply with 250.28(A) through (D). This connection shall be made at any single point on the separately derived system from the source to the first system disconnecting means or overcurrent device, or it shall be made at the source of a separately derived system that has no disconnecting means or overcurrent devices, in accordance with 250.30(A)(1)(a) or (A)(1)(b). The system bonding jumper shall remain within the enclosure where it originates. If the source is located outside the building or structure supplied, a system bonding jumper shall be installed at the grounding electrode connection in compliance with 250.30(C). Exception No. 1: For systems installed in accordance with 450.6, a single system bonding jumper connection to the tie point of the grounded circuit conductors from each power source shall be permitted. Exception No. 2: If a building or structure is supplied by a feeder from an outdoor separately derived system, a system bonding jumper at both the source and the first disconnecting means shall be permitted if doing so does not establish a parallel path for the grounded conductor. If a grounded conductor is used in this manner, it shall not be smaller than the size specified for the system bonding jumper but shall not be required to be larger than the ungrounded conductor(s). For the purposes of this exception, connection through the earth shall not be considered as providing a parallel path. Exception No. 3: The size of the system bonding jumper for a system that supplies a Class 1, Class 2, or Class 3 circuit, and is derived from a transformer rated not more than 1000 volt-amperes, shall not be smaller than the derived ungrounded conductors and shall not be smaller than 14 AWG copper or 12 AWG aluminum.Installed at the Source. The system bonding jumper shall connect the grounded conductor to the supply-side bonding jumper and the normally non-current-carrying metal enclosure.Installed at the First Disconnecting Means. The system bonding jumper shall connect the grounded conductor to the supply-side bonding jumper, the disconnecting means enclosure, and the equipment grounding conductor(s).Exception: Separately derived systems consisting of multiple sources of the same type that are connected in parallel shall be permitted to have the system bonding jumper installed at the paralleling switchgear, switchboard, or other paralleling connection point instead of at the disconnecting means located at each separate source. [250.30_(A)_(1)](https://2023.antflix.net#250.30_(A)_(1))", + "displayTitle": "(1) System Bonding Jumper", + "children": [], + "url": "https://2023.antflix.net#250.30_(A)_(1)" + }, + { + "body": "If the source of a separately derived system and the first disconnecting means are located in separate enclosures, a supply-side bonding jumper shall be installed with the circuit conductors from the source enclosure to the first disconnecting means enclosure. A supply-side bonding jumper shall not be required to be larger than the derived ungrounded conductors. The supply-side bonding jumper shall be permitted to be of nonflexible metal raceway type or of the wire or bus type as follows: A supply-side bonding jumper of the wire type shall comply with 250.102(C), based on the size of the derived ungrounded conductors.A supply-side bonding jumper of the bus type shall have a cross-sectional area not smaller than a supply-side bonding jumper of the wire type as determined in 250.102(C).Exception: A supply-side bonding jumper shall not be required between enclosures for installations made in compliance with 250.30(A)(1), Exception No. 2. [250.30_(A)_(2)](https://2023.antflix.net#250.30_(A)_(2))", + "displayTitle": "(2) Supply-Side Bonding Jumper", + "children": [], + "url": "https://2023.antflix.net#250.30_(A)_(2)" + }, + { + "body": "If a grounded conductor is installed and the system bonding jumper connection is not located at the source, 250.30(A)(3)(a) through (A)(3)(d) shall apply. The grounded conductor shall not be required to be larger than the derived ungrounded conductors. Sizing for a Single Raceway. The grounded conductor shall not be smaller than specified in Table 250.102(C)(1).Conductors Connected in Parallel in Two or More Raceways or Cables. If the ungrounded conductors are connected in parallel in two or more raceways or cables, the grounded conductors shall also be installed in each raceway or cable and shall be connected in parallel. The size of the grounded conductor(s) in each raceway or cable shall be based on the largest derived ungrounded conductor in each raceway or cable, or the sum of the circular mil areas of the largest derived ungrounded conductors from each set connected in parallel in each raceway or cable, in accordance with 250.30(A)(3)(a), but not smaller than 1/0 AWG.Informational Note: See 310.10(G) for grounded conductors connected in parallel.Delta-Connected System. The grounded conductor of a 3-phase, 3-wire delta system shall have an ampacity not less than that of the ungrounded conductors.Impedance Grounded System. The impedance grounding conductor of an impedance grounded system shall be installed in accordance with 250.36 or 250.187, as applicable. [250.30_(A)_(3)](https://2023.antflix.net#250.30_(A)_(3))", + "displayTitle": "(3) Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#250.30_(A)_(3)" + }, + { + "body": "The building or structure grounding electrode system shall be used as the grounding electrode for the separately derived system. If located outdoors, the grounding electrode shall be in accordance with 250.30(C). Exception: If a separately derived system originates in equipment that is listed and identified as suitable for use as service equipment, the grounding electrode used for the service or feeder equipment shall be permitted to be used as the grounding electrode for the separately derived system. Informational Note No. 1: See 250.104(D) for bonding requirements for interior metal water piping in the area served by separately derived systems. Informational Note No. 2: See 250.50 and 250.58 for requirements for bonding all electrodes together if located at the same building or structure. [250.30_(A)_(4)](https://2023.antflix.net#250.30_(A)_(4))", + "displayTitle": "(4) Grounding Electrode", + "children": [], + "url": "https://2023.antflix.net#250.30_(A)_(4)" + }, + { + "body": "A grounding electrode conductor for a single separately derived system shall be sized in accordance with 250.66 for the derived ungrounded conductors. It shall be used to connect the grounded conductor of the derived system to the grounding electrode in accordance with 250.30(A)(4), or as permitted in 250.68(C)(1) and (C)(2). This connection shall be made at the same point on the separately derived system where the system bonding jumper is connected. Exception No. 1: If the system bonding jumper specified in 250.30(A)(1) is a wire or busbar, it shall be permitted to connect the grounding electrode conductor to the equipment grounding terminal, bar, or bus if the equipment grounding terminal, bar, or bus is of sufficient size for the separately derived system. Exception No. 2: If the source of a separately derived system is located within equipment listed and identified as suitable for use as service equipment, the grounding electrode conductor from the service or feeder equipment to the grounding electrode shall be permitted as the grounding electrode conductor for the separately derived system, if the grounding electrode conductor is of sufficient size for the separately derived system. If the equipment grounding bus internal to the equipment is not smaller than the required grounding electrode conductor for the separately derived system, the grounding electrode connection for the separately derived system shall be permitted to be made to the bus. Exception No. 3: A grounding electrode conductor shall not be required for a system that supplies a Class 1, Class 2, or Class 3 circuit and is derived from a transformer rated not more than 1000 volt-amperes, provided the grounded conductor is bonded to the transformer frame or enclosure by a jumper sized in accordance with 250.30(A)(1), Exception No. 3, and the transformer frame or enclosure is grounded by one of the means specified in 250.134. [250.30_(A)_(5)](https://2023.antflix.net#250.30_(A)_(5))", + "displayTitle": "(5) Grounding Electrode Conductor, Single Separately Derived System", + "children": [], + "url": "https://2023.antflix.net#250.30_(A)_(5)" + }, + { + "body": "A common grounding electrode conductor for multiple separately derived systems shall be permitted. If installed, the common grounding electrode conductor shall be used to connect the grounded conductor of each separately derived system to the grounding electrode as specified in 250.30(A)(4). A grounding electrode conductor tap shall then be installed from each separately derived system to the common grounding electrode conductor. Each tap conductor shall connect the grounded conductor of the separately derived system to the common grounding electrode conductor. This connection shall be made at the same point on the separately derived system where the system bonding jumper is connected. Exception No. 1: If the system bonding jumper specified in 250.30(A)(1) is a wire or busbar, it shall be permitted to connect the grounding electrode conductor tap to the equipment grounding terminal, bar, or bus, provided the equipment grounding terminal, bar, or bus is of sufficient size for the separately derived system. Exception No. 2: A grounding electrode conductor shall not be required for a system that supplies a Class 1, Class 2, or Class 3 circuit and is derived from a transformer rated not more than 1000 volt-amperes, provided the system grounded conductor is bonded to the transformer frame or enclosure by a jumper sized in accordance with 250.30(A)(1), Exception No. 3, and the transformer frame or enclosure is grounded by one of the means specified in 250.134. Exception No. 3: If the source of a separately derived system is located within equipment listed and identified as suitable for use as service equipment, the grounding electrode conductor from the service or feeder equipment to the grounding electrode shall be permitted as the grounding electrode conductor for the separately derived system, if the grounding electrode conductor is of sufficient size for the separately derived system. If the equipment grounding bus internal to the equipment is not smaller than the required grounding electrode conductor for the separately derived system, the grounding electrode connection for the separately derived system shall be permitted to be made to the bus.Common Grounding Electrode Conductor. The common grounding electrode conductor shall be permitted to be one of the following:A conductor of the wire type not smaller than 3/0 AWG copper or 250 kcmil aluminumA metal water pipe in accordance with 250.68(C)(1)The metal structural frame of the building or structure in accordance with 250.68(C)(2) or is connected to the grounding electrode system by a conductor not smaller than 3/0 AWG copper or 250 kcmil aluminumTap Conductor Size. Each tap conductor shall be sized in accordance with 250.66 based on the derived ungrounded conductors of the separately derived system it serves.Exception to (a)(1) and (b): If the only electrodes that are present are of the types in 250.66(A), (B), or (C), the size of the common grounding electrode conductor shall not be required to be larger than the largest conductor required by 250.66(A), (B), or (C) for the type of electrode that is present.Connections. All tap connections to the common grounding electrode conductor shall be made at an accessible location by one of the following methods:A connector listed as grounding and bonding equipment.Listed connections to aluminum or copper busbars not smaller than 6 mm thick \u00d7 50 mm wide (1/4 in. thick \u00d7 2 in. wide) and of a length to accommodate the number of terminations necessary for the installation. If aluminum busbars are used, the installation shall also be in accordance with 250.64(A).The exothermic welding process.Tap conductors shall be connected to the common grounding electrode conductor in such a manner that the common grounding electrode conductor remains without a splice or joint. [250.30_(A)_(6)](https://2023.antflix.net#250.30_(A)_(6))", + "displayTitle": "(6) Grounding Electrode Conductor, Multiple Separately Derived Systems", + "children": [], + "url": "https://2023.antflix.net#250.30_(A)_(6)" + }, + { + "body": "The installation of all grounding electrode conductors shall comply with 250.64(A), (B), (C), and (E). [250.30_(A)_(7)](https://2023.antflix.net#250.30_(A)_(7))", + "displayTitle": "(7) Installation", + "children": [], + "url": "https://2023.antflix.net#250.30_(A)_(7)" + }, + { + "body": "Structural steel and metal piping shall be connected to the grounded conductor of a separately derived system in accordance with 250.104(D). [250.30_(A)_(8)](https://2023.antflix.net#250.30_(A)_(8))", + "displayTitle": "(8) Bonding", + "children": [], + "url": "https://2023.antflix.net#250.30_(A)_(8)" + } + ], + "url": "https://2023.antflix.net#250.30_(A)" + }, + { + "body": "The equipment of an ungrounded separately derived system shall be grounded and bonded as specified in 250.30(B)(1) through (B)(3). [250.30_(B)](https://2023.antflix.net#250.30_(B))", + "displayTitle": "(B) Ungrounded Systems", + "children": [ + { + "body": "A grounding electrode conductor, sized in accordance with 250.66 for the largest derived ungrounded conductor(s) or set of derived ungrounded conductors, shall be used to connect the metal enclosures of the derived system to the grounding electrode as specified in 250.30(A)(5) or (A)(6), as applicable. This connection shall be made at any point on the separately derived system from the source to the first system disconnecting means. If the source is located outside the building or structure supplied, a grounding electrode connection shall be made in compliance with 250.30(C). [250.30_(B)_(1)](https://2023.antflix.net#250.30_(B)_(1))", + "displayTitle": "(1) Grounding Electrode Conductor", + "children": [], + "url": "https://2023.antflix.net#250.30_(B)_(1)" + }, + { + "body": "Except as permitted by 250.34 for portable and vehicle-mounted generators, the grounding electrode shall comply with 250.30(A)(4). [250.30_(B)_(2)](https://2023.antflix.net#250.30_(B)_(2))", + "displayTitle": "(2) Grounding Electrode", + "children": [], + "url": "https://2023.antflix.net#250.30_(B)_(2)" + }, + { + "body": "A supply-side bonding jumper shall be installed from the source of a separately derived system to the first disconnecting means in compliance with 250.30(A)(2). [250.30_(B)_(3)](https://2023.antflix.net#250.30_(B)_(3))", + "displayTitle": "(3) Bonding Path and Conductor", + "children": [], + "url": "https://2023.antflix.net#250.30_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#250.30_(B)" + }, + { + "body": "If the source of the separately derived system is located outside the building or structure supplied, a grounding electrode connection shall be made at the source location to one or more grounding electrodes in accordance with 250.50. In addition, the installation shall be in accordance with 250.30(A) for grounded systems or with 250.30(B) for ungrounded systems. Exception: The grounding electrode conductor connection for impedance grounded systems shall be in accordance with 250.36 or 250.187, as applicable. [250.30_(C)](https://2023.antflix.net#250.30_(C))", + "displayTitle": "(C) Outdoor Source", + "children": [], + "url": "https://2023.antflix.net#250.30_(C)" + } + ], + "url": "https://2023.antflix.net#250.30" + }, + { + "displayTitle": "250.32 Buildings or Structures Supplied by a Feeder(s) or Branch Circuit(s)", + "children": [ + { + "body": "A building(s) or structure(s) supplied by a feeder(s) or branch circuit(s) shall have a grounding electrode system and grounding electrode conductor installed in accordance with Part III of Article 250. Exception: A grounding electrode system and grounding electrode conductor shall not be required if only a single branch circuit, including a multiwire branch circuit, supplies the building or structure and the branch circuit includes an equipment grounding conductor for grounding the normally non-current-carrying metal parts of equipment. [250.32_(A)](https://2023.antflix.net#250.32_(A))", + "displayTitle": "(A) Grounding Electrode System and Grounding Electrode Conductor", + "children": [], + "url": "https://2023.antflix.net#250.32_(A)" + }, + { + "displayTitle": "(B) Grounded Systems", + "children": [ + { + "body": "An equipment grounding conductor, as described in 250.118, shall be run with the supply conductors and be connected to the building or structure disconnecting means and to the grounding electrode(s). The equipment grounding conductor shall be used for grounding or bonding of equipment, structures, or frames required to be grounded or bonded. The equipment grounding conductor shall be sized in accordance with 250.122. Any installed grounded conductor shall not be connected to the equipment grounding conductor or to the grounding electrode(s). Exception No. 1: For installations made in compliance with previous editions of this Code that permitted such connection, the grounded conductor run with the supply to the building or structure shall be permitted to serve as the ground-fault return path if all of the following requirements continue to be met: (1) An equipment grounding conductor is not run with the supply to the building or structure. (2) There are no continuous metallic paths bonded to the grounding system in each building or structure involved. (3) Ground-fault protection of equipment has not been installed on the supply side of the feeder(s). If the grounded conductor is used for grounding in accordance with the provision of this exception, the size of the grounded conductor shall not be smaller than the larger of either of the following: (1) The calculated neutral load in accordance with 220.61 (2) The minimum equipment grounding conductor sized in accordance with 250.122 Exception No. 2: If system bonding jumpers are installed in accordance with 250.30(A)(1), Exception No. 2, the feeder grounded circuit conductor at the building or structure served shall be connected to the equipment grounding conductors, grounding electrode conductor, and the enclosure for the first disconnecting means. [250.32_(B)_(1)](https://2023.antflix.net#250.32_(B)_(1))", + "displayTitle": "(1) Supplied by a Feeder or Branch Circuit", + "children": [], + "url": "https://2023.antflix.net#250.32_(B)_(1)" + }, + { + "body": "With Overcurrent Protection. If overcurrent protection is provided where the conductors originate, the installation shall comply with 250.32(B)(1).Without Overcurrent Protection. If overcurrent protection is not provided where the conductors originate, the installation shall comply with 250.30(A). If installed, the supply-side bonding jumper shall be connected to the building or structure disconnecting means and to the grounding electrode(s). [250.32_(B)_(2)](https://2023.antflix.net#250.32_(B)_(2))", + "displayTitle": "(2) Supplied by Separately Derived System", + "children": [], + "url": "https://2023.antflix.net#250.32_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#250.32_(B)" + }, + { + "displayTitle": "(C) Ungrounded Systems", + "children": [ + { + "body": "An equipment grounding conductor, as described in 250.118, shall be installed with the supply conductors and be connected to the building or structure disconnecting means and to the grounding electrode(s). The grounding electrode(s) shall also be connected to the building or structure disconnecting means. [250.32_(C)_(1)](https://2023.antflix.net#250.32_(C)_(1))", + "displayTitle": "(1) Supplied by a Feeder or Branch Circuit", + "children": [], + "url": "https://2023.antflix.net#250.32_(C)_(1)" + }, + { + "body": "With Overcurrent Protection. If overcurrent protection is provided where the conductors originate, the installation shall comply with 250.32(C)(1).Without Overcurrent Protection. If overcurrent protection is not provided where the conductors originate, the installation shall comply with 250.30(B). If installed, the supply-side bonding jumper shall be connected to the building or structure disconnecting means and to the grounding electrode(s). [250.32_(C)_(2)](https://2023.antflix.net#250.32_(C)_(2))", + "displayTitle": "(2) Supplied by a Separately Derived System", + "children": [], + "url": "https://2023.antflix.net#250.32_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#250.32_(C)" + }, + { + "body": "If one or more disconnecting means supply one or more additional buildings or structures under single management, and where these disconnecting means are located remote from those buildings or structures in accordance with 225.31(B), Exception No. 1 and No. 2, 700.12(D)(4), 701.12(D)(3), or 702.12, all of the following conditions shall be met: The connection of the grounded conductor to the grounding electrode, to normally non-current-carrying metal parts of equipment, or to the equipment grounding conductor at a separate building or structure shall not be made.An equipment grounding conductor for grounding and bonding any normally non-current-carrying metal parts of equipment, interior metal piping systems, and building or structural metal frames is run with the circuit conductors to a separate building or structure and connected to existing grounding electrode(s) required in Part III of this article, or, if there are no existing electrodes, the grounding electrode(s) required in Part III of this article shall be installed if a separate building or structure is supplied by more than one branch circuit.The connection between the equipment grounding conductor and the grounding electrode at a separate building or structure shall be made in a junction box, panelboard, or similar enclosure located immediately inside or outside the separate building or structure. [250.32_(D)](https://2023.antflix.net#250.32_(D))", + "displayTitle": "(D) Disconnecting Means Located in Separate Building or Structure on the Same Premises", + "children": [], + "url": "https://2023.antflix.net#250.32_(D)" + }, + { + "body": "The size of the grounding electrode conductor to the grounding electrode(s) shall not be smaller than given in 250.66, based on the largest ungrounded supply conductor. The installation shall comply with Part III of this article. [250.32_(E)](https://2023.antflix.net#250.32_(E))", + "displayTitle": "(E) Grounding Electrode Conductor", + "children": [], + "url": "https://2023.antflix.net#250.32_(E)" + } + ], + "url": "https://2023.antflix.net#250.32" + }, + { + "displayTitle": "250.34 Portable, Vehicle-Mounted, and Trailer-Mounted Generators", + "children": [ + { + "body": "The frame of a portable generator shall not be required to be connected to a grounding electrode as defined in 250.52 for a system supplied by the generator under both of the following conditions: The generator supplies only equipment mounted on the generator, cord-and-plug-connected equipment through receptacles mounted on the generator, or both.The normally non-current-carrying metal parts of equipment and the equipment grounding conductor terminals of the receptacles are connected to the generator frame. [250.34_(A)](https://2023.antflix.net#250.34_(A))", + "displayTitle": "(A) Portable Generators", + "children": [], + "url": "https://2023.antflix.net#250.34_(A)" + }, + { + "body": "The frame of a vehicle or trailer shall not be required to be connected to a grounding electrode as defined in 250.52 for a system supplied by a generator located on this vehicle or trailer under all of the following conditions: The frame of the generator is bonded to the vehicle or trailer frame.The generator supplies only equipment located on the vehicle or trailer; cord-and-plug-connected equipment through receptacles mounted on the vehicle; or both equipment located on the vehicle or trailer and cord-and-plug-connected equipment through receptacles mounted on the vehicle, trailer, or on the generator.The normally non-current-carrying metal parts of equipment and the equipment grounding conductor terminals of the receptacles are connected to the generator frame. [250.34_(B)](https://2023.antflix.net#250.34_(B))", + "displayTitle": "(B) Vehicle-Mounted and Trailer-Mounted Generators", + "children": [], + "url": "https://2023.antflix.net#250.34_(B)" + }, + { + "body": "A conductor that is required to be grounded by 250.26 shall be connected to the generator frame if the generator is a component of a separately derived system. Informational Note: See 250.30 for grounding portable generators supplying fixed wiring systems. [250.34_(C)](https://2023.antflix.net#250.34_(C))", + "displayTitle": "(C) Grounded Conductor Bonding", + "children": [], + "url": "https://2023.antflix.net#250.34_(C)" + } + ], + "url": "https://2023.antflix.net#250.34" + }, + { + "body": "A conductor that provides an effective ground-fault current path shall be installed with the supply conductors from a permanently installed generator(s) to the first disconnecting mean(s) in accordance with 250.35(A) or (B). [250.35](https://2023.antflix.net#250.35)", + "displayTitle": "250.35 Permanently Installed Generators", + "children": [ + { + "body": "If the generator is installed as a separately derived system, the requirements in 250.30 shall apply. [250.35_(A)](https://2023.antflix.net#250.35_(A))", + "displayTitle": "(A) Separately Derived System", + "children": [], + "url": "https://2023.antflix.net#250.35_(A)" + }, + { + "body": "If the generator is installed as a nonseparately derived system, and overcurrent protection is not integral with the generator assembly, a supply-side bonding jumper shall be installed between the generator equipment grounding terminal and the equipment grounding terminal, bar, or bus of the disconnecting mean(s). It shall be sized in accordance with 250.102(C) based on the size of the conductors supplied by the generator. [250.35_(B)](https://2023.antflix.net#250.35_(B))", + "displayTitle": "(B) Nonseparately Derived System", + "children": [], + "url": "https://2023.antflix.net#250.35_(B)" + } + ], + "url": "https://2023.antflix.net#250.35" + }, + { + "body": "Impedance grounded systems in which a grounding impedance device, typically a resistor, limits the ground-fault current shall be permitted for 3-phase ac systems of 480 volts to 1000 volts if all the following conditions are met: The conditions of maintenance and supervision ensure that only qualified persons service the installation.Ground detectors are installed on the system.Line-to-neutral loads are not served.Impedance grounded systems shall comply with 250.36(A) through (G).Informational Note: See NFPA 70E-2021, Standard for Electrical Safety in the Workplace, Annex O, for information on impedance grounding to reduce arc-flash hazards. [250.36](https://2023.antflix.net#250.36)", + "displayTitle": "250.36 Impedance Grounded Systems - 480 Volts to 1000 Volts", + "children": [ + { + "body": "The grounding impedance device shall be installed between the grounding electrode conductor and the impedance grounding conductor connected to the system neutral point. If a neutral point is not available, the grounding impedance shall be installed between the grounding electrode conductor and the impedance grounding conductor connected to the neutral point derived from a grounding transformer. [250.36_(A)](https://2023.antflix.net#250.36_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#250.36_(A)" + }, + { + "body": "The impedance grounding conductor from the neutral point of the transformer or generator to its connection point to the grounding impedance shall be fully insulated. The impedance grounding conductor shall have an ampacity of not less than the maximum current rating of the grounding impedance but in no case shall the impedance grounding conductor be smaller than 8 AWG copper or 6 AWG aluminum or copper-clad aluminum. [250.36_(B)](https://2023.antflix.net#250.36_(B))", + "displayTitle": "(B) Impedance Grounding Conductor Insulation and Ampacity", + "children": [], + "url": "https://2023.antflix.net#250.36_(B)" + }, + { + "body": "The system shall not be connected to ground except through the grounding impedance device. Informational Note: The impedance is normally selected to limit the ground-fault current to a value slightly greater than or equal to the capacitive charging current of the system. This value of impedance will also limit transient overvoltages to safe values. For guidance, refer to criteria for limiting transient overvoltages in IEEE 3003.1-2019, Recommended Practice for System Grounding of Industrial and Commercial Power Systems. [250.36_(C)](https://2023.antflix.net#250.36_(C))", + "displayTitle": "(C) System Grounding Connection", + "children": [], + "url": "https://2023.antflix.net#250.36_(C)" + }, + { + "body": "The impedance grounding conductor shall be permitted to be installed in a separate raceway from the ungrounded conductors. It shall not be required to run this conductor with the phase conductors to the first system disconnecting means or overcurrent device. [250.36_(D)](https://2023.antflix.net#250.36_(D))", + "displayTitle": "(D) Impedance Grounding Conductor Routing", + "children": [], + "url": "https://2023.antflix.net#250.36_(D)" + }, + { + "body": "The impedance bonding jumper (the connection between the equipment grounding conductors and the grounding impedance device) shall be an unspliced conductor run from the first system disconnecting means or overcurrent device to the grounded side of the grounding impedance device. [250.36_(E)](https://2023.antflix.net#250.36_(E))", + "displayTitle": "(E) Impedance Bonding Jumper", + "children": [], + "url": "https://2023.antflix.net#250.36_(E)" + }, + { + "body": "For services or separately derived systems, the grounding electrode conductor shall be connected at any point from the grounded side of the grounding impedance device to the equipment grounding connection at the service equipment or the first system disconnecting means of a separately derived system. [250.36_(F)](https://2023.antflix.net#250.36_(F))", + "displayTitle": "(F) Grounding Electrode Conductor Connection Location", + "children": [], + "url": "https://2023.antflix.net#250.36_(F)" + }, + { + "body": "The impedance bonding jumper shall be sized in accordance with either of the following: If the grounding electrode conductor connection is made at the grounding impedance device, the equipment bonding jumper shall be sized in accordance with 250.66, based on the size of the service entrance conductors for a service or the derived phase conductors for a separately derived system.If the grounding electrode conductor is connected at the first system disconnecting means or overcurrent device, the impedance bonding jumper shall be sized the same as the impedance grounding conductor in 250.36(B). [250.36_(G)](https://2023.antflix.net#250.36_(G))", + "displayTitle": "(G) Impedance Bonding Jumper Size", + "children": [], + "url": "https://2023.antflix.net#250.36_(G)" + } + ], + "url": "https://2023.antflix.net#250.36" + }, + { + "displayTitle": "Part III Grounding Electrode System and Grounding Electrode Conductor", + "children": [], + "url": "https://2023.antflix.net#divider_7_III" + }, + { + "body": "All grounding electrodes as described in 250.52(A)(1) through (A)(7) that are present at each building or structure served shall be bonded together to form the grounding electrode system. If none of these grounding electrodes exist, one or more of the grounding electrodes specified in 250.52(A)(4) through (A)(8) shall be installed and used. Exception: Concrete-encased electrodes of existing buildings or structures shall not be required to be part of the grounding electrode system if the rebar is not accessible for use without disturbing the concrete. [250.50](https://2023.antflix.net#250.50)", + "displayTitle": "250.50 Grounding Electrode System", + "children": [], + "url": "https://2023.antflix.net#250.50" + }, + { + "displayTitle": "250.52 Grounding Electrodes", + "children": [ + { + "displayTitle": "(A) Electrodes Permitted for Grounding", + "children": [ + { + "body": "A metal underground water pipe in direct contact with the earth for 3.0 m (10 ft) or more (including any metal well casing bonded to the pipe) and electrically continuous (or made electrically continuous by bonding around insulating joints or insulating pipe) to the points of connection of the grounding electrode conductor and the bonding conductor(s) or jumper(s), if installed. [250.52_(A)_(1)](https://2023.antflix.net#250.52_(A)_(1))", + "displayTitle": "(1) Metal Underground Water Pipe", + "children": [], + "url": "https://2023.antflix.net#250.52_(A)_(1)" + }, + { + "body": "One or more metal in-ground support structure(s) in direct contact with the earth vertically for 3.0 m (10 ft) or more, with or without concrete encasement. If multiple metal in-ground support structures are present at a building or a structure, it shall be permissible to bond only one into the grounding electrode system. Informational Note: Metal in-ground support structures include, but are not limited to, pilings, casings, and other structural metal. [250.52_(A)_(2)](https://2023.antflix.net#250.52_(A)_(2))", + "displayTitle": "(2) Metal In-Ground Support Structure(s)", + "children": [], + "url": "https://2023.antflix.net#250.52_(A)_(2)" + }, + { + "body": "A concrete-encased electrode shall consist of at least 6.0 m (20 ft) of either of the following: One or more bare or zinc galvanized or other electrically conductive coated rebar of not less than 13 mm (1/2 in.) in diameter, installed in one continuous 6.0 m (20 ft) length, or if in multiple pieces, the rebar shall be connected together by steel tie wires, exothermic welding, welding, or other effective means to create a 6.0 m (20 ft) or greater lengthBare copper conductor not smaller than 4 AWGMetal components shall be encased by at least 50 mm (2 in.) of concrete and shall be located horizontally within that portion of a concrete foundation or footing that is in direct contact with the earth or within vertical foundations or structural components or members that are in direct contact with the earth. If multiple concrete-encased electrodes are present at a building or structure, it shall be permissible to bond only one into the grounding electrode system.Informational Note: Concrete installed with insulation, vapor barriers, films, or similar items separating the concrete from the earth is not considered to be in \"direct contact\" with the earth. [250.52_(A)_(3)](https://2023.antflix.net#250.52_(A)_(3))", + "displayTitle": "(3) Concrete-Encased Electrode", + "children": [], + "url": "https://2023.antflix.net#250.52_(A)_(3)" + }, + { + "body": "A ground ring encircling the building or structure, in direct contact with the earth, consisting of at least 6.0 m (20 ft) of bare copper conductor not smaller than 2 AWG. [250.52_(A)_(4)](https://2023.antflix.net#250.52_(A)_(4))", + "displayTitle": "(4) Ground Ring", + "children": [], + "url": "https://2023.antflix.net#250.52_(A)_(4)" + }, + { + "body": "Rod and pipe electrodes shall not be less than 2.44 m (8 ft) in length and consist of the following materials. Grounding electrodes of pipe or conduit shall not be smaller than metric designator 21 (trade size 3/4) and, where of steel, shall have the outer surface galvanized or otherwise metal-coated for corrosion protection.Rod-type grounding electrodes of stainless steel and copper or zinc-coated steel shall be at least 15.87 mm (5/8 in.) in diameter, unless listed. [250.52_(A)_(5)](https://2023.antflix.net#250.52_(A)_(5))", + "displayTitle": "(5) Rod and Pipe Electrodes", + "children": [], + "url": "https://2023.antflix.net#250.52_(A)_(5)" + }, + { + "body": "Other listed grounding electrodes shall be permitted. [250.52_(A)_(6)](https://2023.antflix.net#250.52_(A)_(6))", + "displayTitle": "(6) Other Listed Electrodes", + "children": [], + "url": "https://2023.antflix.net#250.52_(A)_(6)" + }, + { + "body": "Each plate electrode shall expose not less than 0.186 m2 (2 ft2) of surface to exterior soil. Electrodes of bare or electrically conductive coated iron or steel plates shall be at least 6.4 mm (1/4 in.) in thickness. Solid, uncoated electrodes of nonferrous metal shall be at least 1.5 mm (0.06 in.) in thickness. [250.52_(A)_(7)](https://2023.antflix.net#250.52_(A)_(7))", + "displayTitle": "(7) Plate Electrodes", + "children": [], + "url": "https://2023.antflix.net#250.52_(A)_(7)" + }, + { + "body": "Other local metal underground systems or structures such as piping systems, underground tanks, and underground metal well casings that are not bonded to a metal water pipe. [250.52_(A)_(8)](https://2023.antflix.net#250.52_(A)_(8))", + "displayTitle": "(8) Other Local Metal Underground Systems or Structures", + "children": [], + "url": "https://2023.antflix.net#250.52_(A)_(8)" + } + ], + "url": "https://2023.antflix.net#250.52_(A)" + }, + { + "body": "The following systems and materials shall not be used as grounding electrodes: Metal underground gas piping systemsAluminumThe structures and structural rebar described in 680.26(B)(1) and (B)(2)Informational Note: See 250.104(B) for bonding requirements of gas piping. [250.52_(B)](https://2023.antflix.net#250.52_(B))", + "displayTitle": "(B) Not Permitted for Use as Grounding Electrodes", + "children": [], + "url": "https://2023.antflix.net#250.52_(B)" + } + ], + "url": "https://2023.antflix.net#250.52" + }, + { + "displayTitle": "250.53 Grounding Electrode System Installation", + "children": [ + { + "body": "Rod, pipe, and plate electrodes shall be free from nonconductive coatings such as paint or enamel. Rod, pipe, and plate electrodes shall meet the requirements of 250.53(A)(1) through (A)(3). [250.53_(A)](https://2023.antflix.net#250.53_(A))", + "displayTitle": "(A) Rod, Pipe, and Plate Electrodes", + "children": [ + { + "body": "If practicable, rod, pipe, and plate electrodes shall be embedded below permanent moisture level. [250.53_(A)_(1)](https://2023.antflix.net#250.53_(A)_(1))", + "displayTitle": "(1) Below Permanent Moisture Level", + "children": [], + "url": "https://2023.antflix.net#250.53_(A)_(1)" + }, + { + "body": "A single rod, pipe, or plate electrode shall be supplemented by an additional electrode of a type specified in 250.52(A)(2) through (A)(8). The supplemental electrode shall be permitted to be bonded to one of the following: Rod, pipe, or plate electrodeGrounding electrode conductorGrounded service-entrance conductorNonflexible grounded service racewayAny grounded service enclosureException: If a single rod, pipe, or plate grounding electrode has a resistance to earth of 25 ohms or less, the supplemental electrode shall not be required. [250.53_(A)_(2)](https://2023.antflix.net#250.53_(A)_(2))", + "displayTitle": "(2) Supplemental Electrode Required", + "children": [], + "url": "https://2023.antflix.net#250.53_(A)_(2)" + }, + { + "body": "If multiple rod, pipe, or plate electrodes are installed to meet the requirements of this section, they shall not be less than 1.8 m (6 ft) apart. Informational Note: The paralleling efficiency of rods is increased by spacing them twice the length of the longest rod. [250.53_(A)_(3)](https://2023.antflix.net#250.53_(A)_(3))", + "displayTitle": "(3) Supplemental Electrode", + "children": [], + "url": "https://2023.antflix.net#250.53_(A)_(3)" + }, + { + "body": "The electrode shall be installed such that at least 2.44 m (8 ft) of length is in contact with the soil. It shall be driven to a depth of not less than 2.44 m (8 ft) except that, where rock bottom is encountered, the electrode shall be driven at an oblique angle not to exceed 45 degrees from the vertical or, where rock bottom is encountered at an angle up to 45 degrees, the electrode shall be permitted to be buried in a trench that is at least 750 mm (30 in.) deep. The upper end of the electrode shall be flush with or below ground level unless the aboveground end and the grounding electrode conductor attachment are protected against physical damage as specified in 250.10. [250.53_(A)_(4)](https://2023.antflix.net#250.53_(A)_(4))", + "displayTitle": "(4) Rod and Pipe Electrodes", + "children": [], + "url": "https://2023.antflix.net#250.53_(A)_(4)" + }, + { + "body": "Plate electrodes shall be installed not less than 750 mm (30 in.) below the surface of the earth. [250.53_(A)_(5)](https://2023.antflix.net#250.53_(A)_(5))", + "displayTitle": "(5) Plate Electrode", + "children": [], + "url": "https://2023.antflix.net#250.53_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#250.53_(A)" + }, + { + "body": "If more than one of the electrodes of the type specified in 250.52(A)(5) or (A)(7) are used, each electrode of one grounding system (including that used for strike termination devices) shall not be less than 1.83 m (6 ft) from any other electrode of another grounding system. [250.53_(B)](https://2023.antflix.net#250.53_(B))", + "displayTitle": "(B) Electrode Spacing", + "children": [], + "url": "https://2023.antflix.net#250.53_(B)" + }, + { + "body": "The bonding jumper(s) used to connect the grounding electrodes together to form the grounding electrode system shall be installed in accordance with 250.64(A), (B), and (E), shall be sized in accordance with 250.66, and shall be connected in the manner specified in 250.70. Rebar shall not be used as a conductor to interconnect the electrodes of grounding electrode systems. [250.53_(C)](https://2023.antflix.net#250.53_(C))", + "displayTitle": "(C) Bonding Jumper", + "children": [], + "url": "https://2023.antflix.net#250.53_(C)" + }, + { + "body": "If used as a grounding electrode, metal underground water pipe shall meet the requirements of 250.53(D)(1) and (D)(2). [250.53_(D)](https://2023.antflix.net#250.53_(D))", + "displayTitle": "(D) Metal Underground Water Pipe", + "children": [ + { + "body": "Continuity of the grounding path or the bonding connection to interior piping shall not rely on water meters or filtering devices and similar equipment. [250.53_(D)_(1)](https://2023.antflix.net#250.53_(D)_(1))", + "displayTitle": "(1) Continuity", + "children": [], + "url": "https://2023.antflix.net#250.53_(D)_(1)" + }, + { + "body": "A metal underground water pipe shall be supplemented by an additional electrode of a type specified in 250.52(A)(2) through (A)(8). If the supplemental electrode is of the rod, pipe, or plate type, it shall comply with 250.53(A). The supplemental electrode shall be bonded to one of the following: Grounding electrode conductorGrounded service-entrance conductorNonflexible grounded service racewayAny grounded service enclosureAs provided by 250.32(B)Exception: The supplemental electrode shall be permitted to be bonded to the interior metal water piping as specified in 250.68(C)(1). [250.53_(D)_(2)](https://2023.antflix.net#250.53_(D)_(2))", + "displayTitle": "(2) Supplemental Electrode Required", + "children": [], + "url": "https://2023.antflix.net#250.53_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#250.53_(D)" + }, + { + "body": "If the supplemental electrode is a rod, pipe, or plate electrode, that portion of the bonding jumper that is the sole connection to the supplemental grounding electrode shall not be required to be larger than 6 AWG copper wire or 4 AWG aluminum or copper-clad aluminum wire. [250.53_(E)](https://2023.antflix.net#250.53_(E))", + "displayTitle": "(E) Supplemental Grounding Electrode Bonding Jumper Size", + "children": [], + "url": "https://2023.antflix.net#250.53_(E)" + }, + { + "body": "The ground ring shall be installed not less than 750 mm (30 in.) below the surface of the earth. [250.53_(F)](https://2023.antflix.net#250.53_(F))", + "displayTitle": "(F) Ground Ring", + "children": [], + "url": "https://2023.antflix.net#250.53_(F)" + } + ], + "url": "https://2023.antflix.net#250.53" + }, + { + "body": "One or more grounding electrodes shall be permitted to be connected to the equipment grounding conductors specified in 250.118 and shall not be required to comply with the electrode bonding requirements of 250.50 or 250.53(C) or the resistance requirements of 250.53(A)(2) Exception, but the earth shall not be used as an effective ground-fault current path as specified in 250.4(A)(5) and (B)(4). [250.54](https://2023.antflix.net#250.54)", + "displayTitle": "250.54 Auxiliary Grounding Electrodes", + "children": [], + "url": "https://2023.antflix.net#250.54" + }, + { + "body": "If an ac system is connected to a grounding electrode in or at a building or structure, the same electrode shall be used to ground conductor enclosures and equipment in or on that building or structure. If separate services, feeders, or branch circuits supply a building and are required to be connected to a grounding electrode(s) the same grounding electrode(s) shall be used. [250.58](https://2023.antflix.net#250.58)", + "displayTitle": "250.58 Common Grounding Electrode", + "children": [], + "url": "https://2023.antflix.net#250.58" + }, + { + "body": "Conductors and driven pipes, rods, or plate electrodes used for grounding strike termination devices shall not be used in lieu of the grounding electrodes required by 250.50 for grounding wiring systems and equipment. This provision shall not prohibit the required bonding together of grounding electrodes of different systems. Informational Note No. 1: See 250.106 for the bonding requirement of the lightning protection system components to the building or structure grounding electrode system. Informational Note No. 2: Bonding together of all separate grounding electrodes will limit voltage differences between them and between their associated wiring systems. [250.60](https://2023.antflix.net#250.60)", + "displayTitle": "250.60 Use of Strike Termination Devices", + "children": [], + "url": "https://2023.antflix.net#250.60" + }, + { + "body": "The grounding electrode conductor shall be of copper, aluminum, copper-clad aluminum, or the items as permitted in 250.68(C). The material selected shall be resistant to any corrosive condition existing at the installation or shall be protected against corrosion. Conductors of the wire type shall be solid or stranded, insulated, covered, or bare. [250.62](https://2023.antflix.net#250.62)", + "displayTitle": "250.62 Grounding Electrode Conductor Material", + "children": [], + "url": "https://2023.antflix.net#250.62" + }, + { + "body": "Grounding electrode conductors at the service, at each building or structure where supplied by a feeder(s) or branch circuit(s), or at a separately derived system shall be installed as specified in 250.64(A) through (G). [250.64](https://2023.antflix.net#250.64)", + "displayTitle": "250.64 Grounding Electrode Conductor Installation", + "children": [ + { + "body": "Grounding electrode conductors of bare, covered, or insulated aluminum or copper-clad aluminum shall comply with the following: Bare or covered conductors without an extruded polymeric covering shall not be installed where subject to corrosive conditions or be installed in direct contact with concrete.Terminations made within outdoor enclosures that are listed and identified for the environment shall be permitted within 450 mm (18 in.) of the bottom of the enclosure.Aluminum or copper-clad aluminum conductors external to buildings or equipment enclosures shall not be terminated within 450 mm (18 in.) of the earth. [250.64_(A)](https://2023.antflix.net#250.64_(A))", + "displayTitle": "(A) Aluminum or Copper-Clad Aluminum Conductors", + "children": [], + "url": "https://2023.antflix.net#250.64_(A)" + }, + { + "body": "If exposed, a grounding electrode conductor or its enclosure shall be securely fastened to the surface on which it is carried. Grounding electrode conductors shall be permitted to be installed on or through framing members. [250.64_(B)](https://2023.antflix.net#250.64_(B))", + "displayTitle": "(B) Securing and Protection Against Physical Damage", + "children": [ + { + "body": "A 6 AWG or larger copper, copper-clad aluminum, or aluminum grounding electrode conductor not exposed to physical damage shall be permitted to be run along the surface of the building construction without metal covering or protection. [250.64_(B)_(1)](https://2023.antflix.net#250.64_(B)_(1))", + "displayTitle": "(1) Not Exposed to Physical Damage", + "children": [], + "url": "https://2023.antflix.net#250.64_(B)_(1)" + }, + { + "body": "A 6 AWG or larger copper, copper-clad aluminum, or aluminum grounding electrode conductor exposed to physical damage shall be protected in rigid metal conduit (RMC), intermediate metal conduit (IMG), Schedule 80 rigid polyvinyl chloride conduit (PVC), reinforced thermosetting resin conduit Type XW (RTRC-XW), electrical metallic tubing (EMT), or cable armor. [250.64_(B)_(2)](https://2023.antflix.net#250.64_(B)_(2))", + "displayTitle": "(2) Exposed to Physical Damage", + "children": [], + "url": "https://2023.antflix.net#250.64_(B)_(2)" + }, + { + "body": "Grounding electrode conductors smaller than 6 AWG shall be protected in RMC, IMC, Schedule 80 PVC, RTRC-XW, EMT, or cable armor. [250.64_(B)_(3)](https://2023.antflix.net#250.64_(B)_(3))", + "displayTitle": "(3) Smaller Than 6 AWG", + "children": [], + "url": "https://2023.antflix.net#250.64_(B)_(3)" + }, + { + "body": "Grounding electrode conductors and grounding electrode bonding jumpers in contact with the earth shall not be required to comply with 300.5 or 305.15, but shall be buried or otherwise protected if subject to physical damage. [250.64_(B)_(4)](https://2023.antflix.net#250.64_(B)_(4))", + "displayTitle": "(4) In Contact With the Earth", + "children": [], + "url": "https://2023.antflix.net#250.64_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#250.64_(B)" + }, + { + "body": "Except as provided in 250.30(A)(5) and (A)(6), 250.30(B)(1), and 250.68(C), grounding electrode conductor(s) shall be installed in one continuous length without a splice or joint. If necessary, splices or connections shall be made as permitted in the following: Splicing of the wire-type grounding electrode conductor shall be permitted only by irreversible compression-type connectors listed as grounding and bonding equipment or by the exothermic welding process.Sections of busbars shall be permitted to be connected together to form a grounding electrode conductor.Bolted, riveted, or welded connections of structural metal frames of buildings or structures.Threaded, welded, brazed, soldered or bolted-flange connections of metal water piping. [250.64_(C)](https://2023.antflix.net#250.64_(C))", + "displayTitle": "(C) Continuous", + "children": [], + "url": "https://2023.antflix.net#250.64_(C)" + }, + { + "body": "If a building or structure is supplied by a service or feeder with two or more disconnecting means in separate enclosures, the grounding electrode connections shall be made in accordance with 250.64(D)(1), (D)(2), or (D)(3). [250.64_(D)](https://2023.antflix.net#250.64_(D))", + "displayTitle": "(D) Building or Structure With Multiple Disconnecting Means in Separate Enclosures", + "children": [ + { + "body": "A common grounding electrode conductor and grounding electrode conductor taps shall be installed. The common grounding electrode conductor shall be sized in accordance with 250.66, based on the sum of the circular mil area of the largest ungrounded conductor(s) of each set of conductors that supplies the disconnecting means. If the service-entrance conductors connect directly to the overhead service conductors, service drop, underground service conductors, or service lateral, the common grounding electrode conductor shall be sized in accordance with Table 250.66, note 1. A grounding electrode conductor tap shall extend to the inside of each disconnecting means enclosure. The grounding electrode conductor taps shall be sized in accordance with 250.66 for the largest service-entrance or feeder conductor serving the individual enclosure. The tap conductors shall be connected to the common grounding electrode conductor by one of the following methods in such a manner that the common grounding electrode conductor remains without a splice or joint:Exothermic welding.Connectors listed as grounding and bonding equipment.Connections to an aluminum or copper busbar not less than 6 mm thick \u00d7 50 mm wide (1/4 in. thick \u00d7 2 in. wide) and of a length to accommodate the number of terminations necessary for the installation. The busbar shall be securely fastened and shall be installed in an accessible location. Connections shall be made by a listed connector or by the exothermic welding process. If aluminum busbars are used, the installation shall comply with 250.64(A). [250.64_(D)_(1)](https://2023.antflix.net#250.64_(D)_(1))", + "displayTitle": "(1) Common Grounding Electrode Conductor and Taps", + "children": [], + "url": "https://2023.antflix.net#250.64_(D)_(1)" + }, + { + "body": "A grounding electrode conductor shall be connected between the grounding electrode system and one or more of the following, as applicable: Grounded conductor in each service equipment disconnecting means enclosureEquipment grounding conductor installed with the feeder(s) or branch circuit(s) for other than servicesSupply-side bonding jumperEach grounding electrode conductor shall be sized in accordance with 250.66 based on the service-entrance or feeder conductor(s) supplying the individual disconnecting means. [250.64_(D)_(2)](https://2023.antflix.net#250.64_(D)_(2))", + "displayTitle": "(2) Individual Grounding Electrode Conductors", + "children": [], + "url": "https://2023.antflix.net#250.64_(D)_(2)" + }, + { + "body": "A grounding electrode conductor shall be connected in a wireway or other accessible enclosure on the supply side of the disconnecting means to one or more of the following, as applicable: Grounded service conductor(s)Equipment grounding conductor installed with the feederSupply-side bonding jumperThe connection shall be made with exothermic welding or a connector listed as grounding and bonding equipment. The grounding electrode conductor shall be sized in accordance with 250.66 based on the service-entrance or feeder conductor(s) at the common location where the connection is made. [250.64_(D)_(3)](https://2023.antflix.net#250.64_(D)_(3))", + "displayTitle": "(3) Common Location", + "children": [], + "url": "https://2023.antflix.net#250.64_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#250.64_(D)" + }, + { + "displayTitle": "(E) Raceways, Cable Armor, and Enclosures for Grounding Electrode Conductors", + "children": [ + { + "body": "Ferrous metal raceways, enclosures, and cable armor for grounding electrode conductors shall be electrically continuous from the point of attachment to cabinets or equipment to the grounding electrode and shall be securely fastened to the ground clamp or fitting. Ferrous metal raceways, enclosures, and cable armor shall be bonded at each end of the raceway or enclosure to the grounding electrode or grounding electrode conductor to create an electrically parallel path. Nonferrous metal raceways, enclosures, and cable armor shall not be required to be electrically continuous. [250.64_(E)_(1)](https://2023.antflix.net#250.64_(E)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#250.64_(E)_(1)" + }, + { + "body": "Bonding shall be in compliance with 250.92(B) and ensured by one of the methods in 250.92(B)(2) through (B)(4). [250.64_(E)_(2)](https://2023.antflix.net#250.64_(E)_(2))", + "displayTitle": "(2) Methods", + "children": [], + "url": "https://2023.antflix.net#250.64_(E)_(2)" + }, + { + "body": "The bonding jumper for a grounding electrode conductor(s), raceway(s), enclosure(s), or cable armor shall be the same size as, or larger than, the largest enclosed grounding electrode conductor. [250.64_(E)_(3)](https://2023.antflix.net#250.64_(E)_(3))", + "displayTitle": "(3) Size", + "children": [], + "url": "https://2023.antflix.net#250.64_(E)_(3)" + }, + { + "body": "If a raceway is used as protection for a grounding electrode conductor, the installation shall comply with the requirements of the applicable raceway article. [250.64_(E)_(4)](https://2023.antflix.net#250.64_(E)_(4))", + "displayTitle": "(4) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#250.64_(E)_(4)" + } + ], + "url": "https://2023.antflix.net#250.64_(E)" + }, + { + "body": "Grounding electrode conductor(s) and bonding jumpers interconnecting grounding electrodes shall be installed in accordance with one of the following. The grounding electrode conductor shall be sized for the largest grounding electrode conductor required among all the electrodes connected to it. The grounding electrode conductor shall be permitted to be run to any convenient grounding electrode available in the grounding electrode system where the other electrode(s), if any, is connected by bonding jumpers that are installed in accordance with 250.53(C).Grounding electrode conductor(s) shall be permitted to be run to one or more grounding electrode(s) individually.Bonding jumper(s) from grounding electrode(s) shall be permitted to be connected to an aluminum or copper busbar not less than 6 mm thick \u00d7 50 mm wide (1/4 in. thick \u00d7 2 in wide.) and of sufficient length to accommodate the number of terminations necessary for the installation. The busbar shall be securely fastened and shall be installed in an accessible location. Connections shall be made by a listed connector or by the exothermic welding process. The grounding electrode conductor shall be permitted to be run to the busbar. Where aluminum busbars are used, the installation shall comply with 250.64(A). [250.64_(F)](https://2023.antflix.net#250.64_(F))", + "displayTitle": "(F) Installation to Electrode(s)", + "children": [], + "url": "https://2023.antflix.net#250.64_(F)" + }, + { + "body": "Grounding electrode conductors shall not be installed through a ventilation opening of an enclosure. [250.64_(G)](https://2023.antflix.net#250.64_(G))", + "displayTitle": "(G) Enclosures With Ventilation Openings", + "children": [], + "url": "https://2023.antflix.net#250.64_(G)" + } + ], + "url": "https://2023.antflix.net#250.64" + }, + { + "body": "The size of the grounding electrode conductor and bonding jumper(s) for connection of grounding electrodes shall not be smaller than given in Table 250.66, except as permitted in 250.66(A) through (C).Table 250.66 Grounding Electrode Conductor for Alternating-Current Systems Size of Largest Ungrounded Conductor or Equivalent Area for Parallel Conductors (AWG/kcmil) Size of Grounding Electrode Conductor (AWG/kcmil) Copper Aluminum or Copper-Clad Aluminum Copper Aluminum or Copper-Clad Aluminum 2 or smaller 1/0 or smaller 8 6 1 or 1/0 2/0 or 3/0 6 4 2/0 or 3/0 4/0 or 250 4 2 Over 3/0 through 350 Over 250 through 500 2 1/0 Over 350 through 600 Over 500 through 900 1/0 3/0 Over 600 through 1100 Over 900 through 1750 2/0 4/0 Over 1100 Over 1750 3/0 250 Notes:If multiple sets of service-entrance conductors connect directly to a service drop, set of overhead service conductors, set of underground service conductors, or service lateral, the equivalent size of the largest service-entrance conductor shall be determined by the largest sum of the areas of the corresponding conductors of each set.If there are no service-entrance conductors, the grounding electrode conductor size shall be determined by the equivalent size of the largest service-entrance conductor required for the load to be served.See installation restrictions in 250.64. [250.66](https://2023.antflix.net#250.66)", + "displayTitle": "250.66 Size of Alternating-Current Grounding Electrode Conductor", + "children": [ + { + "body": "If the grounding electrode conductor or bonding jumper connected to a single or multiple rod, pipe, or plate electrode(s), or any combination thereof, as described in 250.52(A)(5) or (A)(7), does not extend on to other types of electrodes that require a larger size conductor, the grounding electrode conductor shall not be required to be larger than 6 AWG copper wire or 4 AWG aluminum or copper-clad aluminum wire. [250.66_(A)](https://2023.antflix.net#250.66_(A))", + "displayTitle": "(A) Connections to a Rod, Pipe, or Plate Electrode(s)", + "children": [], + "url": "https://2023.antflix.net#250.66_(A)" + }, + { + "body": "If the grounding electrode conductor or bonding jumper connected to a single or multiple concrete-encased electrode(s), as described in 250.52(A)(3), does not extend on to other types of electrodes that require a larger size of conductor, the grounding electrode conductor shall not be required to be larger than 4 AWG copper wire. [250.66_(B)](https://2023.antflix.net#250.66_(B))", + "displayTitle": "(B) Connections to Concrete-Encased Electrodes", + "children": [], + "url": "https://2023.antflix.net#250.66_(B)" + }, + { + "body": "If the grounding electrode conductor or bonding jumper connected to a ground ring, as described in 250.52(A)(4), does not extend on to other types of electrodes that require a larger size of conductor, the grounding electrode conductor shall not be required to be larger than the conductor used for the ground ring. [250.66_(C)](https://2023.antflix.net#250.66_(C))", + "displayTitle": "(C) Connections to Ground Rings", + "children": [], + "url": "https://2023.antflix.net#250.66_(C)" + } + ], + "url": "https://2023.antflix.net#250.66" + }, + { + "body": "The connection of a grounding electrode conductor at the service, at each building or structure where supplied by a feeder(s) or branch circuit(s), or at a separately derived system and associated bonding jumper(s) shall be made as specified 250.68(A) through (C). [250.68](https://2023.antflix.net#250.68)", + "displayTitle": "250.68 Grounding Electrode Conductor and Bonding Jumper Connection to Grounding Electrodes", + "children": [ + { + "body": "All mechanical elements used to terminate a grounding electrode conductor or bonding jumper to a grounding electrode shall be accessible. Exception No. 1: An encased or buried connection to a concrete-encased, driven, or buried grounding electrode shall not be required to be accessible. Exception No. 2: Exothermic or irreversible compression connections used at terminations, together with the mechanical means used to attach such terminations to fireproofed structural metal whether or not the mechanical means is reversible, shall not be required to be accessible. [250.68_(A)](https://2023.antflix.net#250.68_(A))", + "displayTitle": "(A) Accessibility", + "children": [], + "url": "https://2023.antflix.net#250.68_(A)" + }, + { + "body": "The connection of a grounding electrode conductor or bonding jumper to a grounding electrode shall be made in a manner that will ensure an effective grounding path. Where necessary to ensure the grounding path for a metal piping system used as a grounding electrode, bonding shall be provided around insulated joints and around any equipment likely to be disconnected for repairs or replacement. Bonding jumpers shall be of sufficient length to permit removal of such equipment while retaining the integrity of the grounding path. [250.68_(B)](https://2023.antflix.net#250.68_(B))", + "displayTitle": "(B) Effective Grounding Path", + "children": [], + "url": "https://2023.antflix.net#250.68_(B)" + }, + { + "body": "Grounding electrode conductors and bonding jumpers shall be permitted to be connected at the following locations and used to extend the connection to an electrode(s): Interior metal water piping that is electrically continuous with a metal underground water pipe electrode and is located not more than 1.52 m (5 ft) from the point of entrance to the building, as measured along the water piping, shall be permitted to extend the connection to an electrode(s). Interior metal water piping located more than 1.52 m (5 ft) from the point of entrance to the building, as measured along the water piping, shall not be used as a conductor to interconnect electrodes of the grounding electrode system.Exception: In industrial, commercial, and institutional buildings or structures, if conditions of maintenance and supervision ensure that only qualified persons service the installation, interior metal water piping located more than 1.52 m (5 ft) from the point of entrance to the building, as measured along the water piping, shall be permitted as a bonding conductor to interconnect electrodes that are part of the grounding electrode system, or as a grounding electrode conductor, if the entire length, other than short sections passing perpendicularly through walls, floors, or ceilings, of the interior metal water pipe that is being used for the conductor is exposed.The metal structural frame of a building shall be permitted to be used as a conductor to interconnect electrodes that are part of the grounding electrode system, or as a grounding electrode conductor. Hold-down bolts securing the structural steel column that are connected to a concrete-encased electrode complying with 250.52(A)(3) and located in the support footing or foundation shall be permitted to connect the metal structural frame of a building or structure to the concrete-encased grounding electrode. The hold-down bolts shall be connected to the concrete-encased electrode by welding, exothermic welding, steel tie wires, or other approved means.A rebar-type concrete-encased electrode installed in accordance with 250.52(A)(3) with an additional rebar section extended from its location within the concrete foundation or footing to an accessible location that is not subject to corrosion shall be permitted for connection of grounding electrode conductors and bonding jumpers in accordance with the following:The additional rebar section shall be continuous with the grounding electrode rebar or shall be connected to the grounding electrode rebar and connected together by steel tie wires, exothermic welding, welding, or other effective means.The rebar extension shall not be exposed to contact with the earth without corrosion protection.Rebar shall not be used as a conductor to interconnect the electrodes of grounding electrode systems. [250.68_(C)](https://2023.antflix.net#250.68_(C))", + "displayTitle": "(C) Grounding Electrode Conductor Connections", + "children": [], + "url": "https://2023.antflix.net#250.68_(C)" + } + ], + "url": "https://2023.antflix.net#250.68" + }, + { + "displayTitle": "250.70 Methods of Grounding and Bonding Conductor Connection to Electrodes", + "children": [ + { + "body": "The grounding or bonding conductor shall be connected to the grounding electrode by exothermic welding, listed lugs, listed pressure connectors, listed clamps, or other listed means. Connections depending on solder shall not be used. Ground clamps shall be listed for the materials of the grounding electrode and the grounding electrode conductor and, if used on pipe, rod, or other buried electrodes, shall also be listed for direct soil burial or concrete encasement. Not more than one conductor shall be connected to the grounding electrode by a single clamp or fitting unless the clamp or fitting is listed for multiple conductors. [250.70_(A)](https://2023.antflix.net#250.70_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#250.70_(A)" + }, + { + "body": "For indoor communications purposes only, a listed sheet metal strap-type ground clamp having a rigid metal base that seats on the electrode and having a strap of such material and dimensions that it is not likely to stretch during or after installation shall be permitted. Informational Note: Listed ground clamps that are identified for direct burial are also suitable for concrete encasement. [250.70_(B)](https://2023.antflix.net#250.70_(B))", + "displayTitle": "(B) Indoor Communications Systems", + "children": [], + "url": "https://2023.antflix.net#250.70_(B)" + } + ], + "url": "https://2023.antflix.net#250.70" + }, + { + "displayTitle": "Part IV Enclosure, Raceway, and Service Cable Connections", + "children": [], + "url": "https://2023.antflix.net#divider_5_IV" + }, + { + "body": "Metal enclosures and raceways for service conductors and equipment shall be connected to the grounded conductor if the electrical system is grounded or to the grounding electrode conductor for electrical systems that are not grounded. Exception: Metal components that are installed in a run of underground nonmetallic raceway(s) and are isolated from possible contact by a minimum cover of 450 mm (18 in.) to all parts of the metal components shall not be required to be connected to the grounded conductor, supply-side bonding jumper, or grounding electrode conductor. [250.80](https://2023.antflix.net#250.80)", + "displayTitle": "250.80 Service Raceways and Enclosures", + "children": [], + "url": "https://2023.antflix.net#250.80" + }, + { + "displayTitle": "250.84 Underground Service Cable or Raceway", + "children": [ + { + "body": "The sheath or armor of a continuous underground metal-sheathed or armored service cable system that is connected to the grounded conductor on the supply side shall not be required to be connected to the grounded conductor at the building or structure. The sheath or armor shall be permitted to be insulated from the interior metal raceway or piping. [250.84_(A)](https://2023.antflix.net#250.84_(A))", + "displayTitle": "(A) Underground Service Cable", + "children": [], + "url": "https://2023.antflix.net#250.84_(A)" + }, + { + "body": "An underground metal service raceway that contains a metal-sheathed or armored cable connected to the grounded conductor shall not be required to be connected to the grounded conductor at the building or structure. The sheath or armor shall be permitted to be insulated from the interior metal raceway or piping. [250.84_(B)](https://2023.antflix.net#250.84_(B))", + "displayTitle": "(B) Underground Service Raceway Containing Cable", + "children": [], + "url": "https://2023.antflix.net#250.84_(B)" + } + ], + "url": "https://2023.antflix.net#250.84" + }, + { + "body": "Except as permitted by 250.112(1), metal enclosures and raceways for other than service conductors shall be connected to the equipment grounding conductor. Exception No. 1: Metal enclosures and raceways for conductors added to existing installations of open wire, knob-and-tube wiring, and nonmetallic-sheathed cable shall not be required to be connected to the equipment grounding conductor if these enclosures or wiring methods comply with all the following: (1) Do not provide an equipment ground (2) Are in runs of less than 7.5 m (25 ft) (3) Are free from probable contact with ground, grounded metal, metal lath, or other conductive material (4) Are guarded against contact by persons Exception No. 2: Short sections of metal enclosures or raceways used to provide support or protection of cable assemblies from physical damage shall not be required to be connected to the equipment grounding conductor. Exception No. 3: Metal components shall not be required to be connected to the equipment grounding conductor or supply-side bonding jumper if either of the following conditions exist: (1) The metal components are installed in a run of nonmetallic raceway(s) and isolated from possible contact by a minimum cover of 450 mm (18 in.) to any part of the metal components. (2) The metal components are part of an installation of nonmetallic raceway(s) and are isolated from possible contact to any part of the metal components by being encased in not less than 50 mm (2 in.) of concrete. [250.86](https://2023.antflix.net#250.86)", + "displayTitle": "250.86 Other Conductor Enclosures and Raceways", + "children": [], + "url": "https://2023.antflix.net#250.86" + }, + { + "displayTitle": "Part V Bonding", + "children": [], + "url": "https://2023.antflix.net#divider_5_V" + }, + { + "body": "Bonding shall be provided if necessary to ensure electrical continuity and the capacity to conduct safely any fault current likely to be imposed. [250.90](https://2023.antflix.net#250.90)", + "displayTitle": "250.90 General", + "children": [], + "url": "https://2023.antflix.net#250.90" + }, + { + "displayTitle": "250.92 Services", + "children": [ + { + "body": "The normally noncurrent-carrying metal parts of equipment indicated in the following shall be bonded together: All raceways, cable trays, cablebus framework, auxiliary gutters, or service cable armor or sheath that enclose, contain, or support service conductors, except as permitted in 250.80All enclosures containing service conductors, including meter fittings, boxes, or the like, interposed in the service raceway or armor [250.92_(A)](https://2023.antflix.net#250.92_(A))", + "displayTitle": "(A) Bonding of Equipment for Services", + "children": [], + "url": "https://2023.antflix.net#250.92_(A)" + }, + { + "body": "Bonding jumpers meeting the requirements of this article shall be used around impaired connections, such as reducing washers or oversized, concentric, or eccentric knockouts. Standard locknuts or bushings shall not be the only means for the bonding required by this section but shall be permitted to be installed to make a mechanical connection of the raceway(s). Electrical continuity at service equipment, service raceways, and service conductor enclosures shall be ensured by one or more of the following methods:Bonding equipment to the grounded service conductor by an applicable method in 250.8(A)Connections made up wrenchtight using threaded couplings, threaded entries, or listed threaded hubs on enclosuresThreadless couplings and connectors if made up tight for metal raceways and metal-clad cablesOther listed devices, such as bonding-type locknuts, bushings, or bushings with bonding jumpers [250.92_(B)](https://2023.antflix.net#250.92_(B))", + "displayTitle": "(B) Method of Bonding at the Service", + "children": [], + "url": "https://2023.antflix.net#250.92_(B)" + } + ], + "url": "https://2023.antflix.net#250.92" + }, + { + "body": "Communications system bonding conductor terminations shall be connected in accordance with 250.94(A) or (B). [250.94](https://2023.antflix.net#250.94)", + "displayTitle": "250.94 Bonding for Communications Systems", + "children": [ + { + "body": "An intersystem bonding termination (IBT) for connecting intersystem bonding conductors shall be provided external to enclosures at the service equipment or metering equipment enclosure and at the disconnecting means for any buildings or structures that are supplied by a feeder or branch circuit. If an IBT is used, it shall comply with the following: Be accessible for connection and inspectionConsist of a set of terminals with the capacity for connection of not less than three intersystem bonding conductorsNot interfere with opening the enclosure for a service, building or structure disconnecting means, or metering equipmentBe securely mounted as follows:At the service equipment, to a metal enclosure for the service equipment, to a metal meter enclosure, or to an exposed nonflexible metal service raceway, or be connected to the metal enclosure for the grounding electrode conductor with a minimum 6 AWG copper conductorAt the disconnecting means for a building or structure that is supplied by a feeder or branch circuit, be electrically connected to the metal enclosure for the building or structure disconnecting means, or be connected to the metal enclosure for the grounding electrode conductor with a minimum 6 AWG copper conductorBe listed as grounding and bonding equipmentException: In existing buildings or structures, if any of the intersystem bonding and grounding electrode conductors required by 770.100(B)(2), 800.100(B)(2), 810.21(F)(2), and 820.100 exist, installation of an IBT shall not be required. An accessible means external to enclosures for connecting intersystem bonding and grounding electrode conductors shall be permitted at the service equipment and at the disconnecting means for any buildings or structures that are supplied by a feeder or branch circuit by at least one of the following means:Exposed nonflexible metal racewaysAn exposed grounding electrode conductorApproved means for the external connection of a copper or other corrosion-resistant bonding or grounding electrode conductor to the grounded raceway or equipmentInformational Note: See 770.100, 800.100, 810.21, and 820.100 for intersystem bonding and grounding requirements for conductive optical fiber cables, communications circuits, radio and television equipment, CATV circuits, and network-powered broadband communications systems, respectively. [250.94_(A)](https://2023.antflix.net#250.94_(A))", + "displayTitle": "(A) The Intersystem Bonding Termination Device", + "children": [], + "url": "https://2023.antflix.net#250.94_(A)" + }, + { + "body": "Connections to an aluminum or copper busbar not less than 6 mm thick \u00d7 50 mm wide (1/4 in. thick \u00d7 2 in. wide) and of a length to accommodate at least three terminations for communication systems in addition to other connections. The busbar shall be securely fastened and shall be installed in an accessible location. Connections shall be made by a listed connector. If aluminum busbars are used, the installation shall also comply with 250.64(A). The busbar shall be connected to the grounding electrode system by a conductor that is the larger of the following: The largest grounding electrode conductor that is connected to the busbarAs required or permitted in 250.94(A)Exception to (A) and (B): Means for connecting intersystem bonding conductors are not required if communications systems are not likely to be used in or on the building or structure.Informational Note: The use of an IBT can reduce electrical noise on communication systems. [250.94_(B)](https://2023.antflix.net#250.94_(B))", + "displayTitle": "(B) Other Means", + "children": [], + "url": "https://2023.antflix.net#250.94_(B)" + } + ], + "url": "https://2023.antflix.net#250.94" + }, + { + "displayTitle": "250.96 Bonding Other Enclosures", + "children": [ + { + "body": "Metal raceways, cable trays, cable armor, cable sheath, enclosures, frames, fittings, and other metal noncurrent-carrying parts that are to serve as equipment grounding conductors, with or without the use of wire-type supplementary equipment grounding conductors, shall be bonded if necessary to ensure electrical continuity and the capacity to conduct fault current likely to be imposed on them. Any nonconductive paint, enamel, or similar coating shall be removed at threads, contact points, and contact surfaces or shall be connected by means of fittings designed so as to make such removal unnecessary. [250.96_(A)](https://2023.antflix.net#250.96_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#250.96_(A)" + }, + { + "body": "If installed for the reduction of electromagnetic interference on the grounding circuit, an equipment enclosure supplied by a branch circuit shall be permitted to be isolated from a raceway containing circuits supplying only that equipment by one or more listed nonmetallic raceway fittings located at the point of attachment of the raceway to the equipment enclosure. The metal raceway shall comply with this article and shall be supplemented by an internal insulated equipment grounding conductor installed in accordance with 250.146(D) to ground the equipment enclosure. Informational Note: Use of an isolated equipment grounding conductor does not relieve the requirement for grounding the raceway system. [250.96_(B)](https://2023.antflix.net#250.96_(B))", + "displayTitle": "(B) Isolated Grounding Circuits", + "children": [], + "url": "https://2023.antflix.net#250.96_(B)" + } + ], + "url": "https://2023.antflix.net#250.96" + }, + { + "body": "For circuits of over 250 volts to ground, the electrical continuity of metal raceways and cables with metal sheaths that contain any conductor other than service conductors shall be ensured by one or more of the methods specified for services in 250.92(B), except for (B)(1). Exception: If oversized, concentric, or eccentric knockouts are not encountered, or if a box or enclosure with concentric or eccentric knockouts is listed to provide a reliable bonding connection, the following methods shall be permitted: (1) Threadless couplings and connectors for cables with metal sheaths (2) Two locknuts, on rigid metal conduit or intermediate metal conduit, one inside and one outside of boxes and cabinets (3) Fittings with shoulders that seal tightly against the box or cabinet, such as electrical metallic tubing connectors, flexible metal conduit connectors, and cable connectors, with one locknut on the inside of boxes and cabinets (4) Listed fittings [250.97](https://2023.antflix.net#250.97)", + "displayTitle": "250.97 Bonding for Over 250 Volts to Ground", + "children": [], + "url": "https://2023.antflix.net#250.97" + }, + { + "body": "Expansion, expansion-deflection, or deflection fittings and telescoping sections of metal raceways shall be made electrically continuous by equipment bonding jumpers or other means. [250.98](https://2023.antflix.net#250.98)", + "displayTitle": "250.98 Bonding Loosely Jointed Metal Raceways", + "children": [], + "url": "https://2023.antflix.net#250.98" + }, + { + "body": "Regardless of the voltage of the electrical system, the electrical continuity of normally non-current-carrying metal parts of electrical equipment, raceways, metal-clad cable, and metal enclosures containing electrical equipment in any hazardous (classified) location, as defined in 500.5, 505.5, and 506.5, shall be ensured by any of the bonding methods specified in 250.92(B)(2) through (B)(4). One or more of these bonding methods shall be used whether or not equipment grounding conductors of the wire type are installed in the raceway or in a multiconductor cable assembly. Informational Note: See 501.30, 502.30, 503.30, 505.30, or 506.30 for specific bonding requirements. [250.100](https://2023.antflix.net#250.100)", + "displayTitle": "250.100 Bonding in Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#250.100" + }, + { + "displayTitle": "250.102 Grounded Conductor, Bonding Conductors, and Jumpers", + "children": [ + { + "body": "Bonding jumpers shall be of copper, aluminum, copper-clad aluminum, or other corrosion-resistant material. A bonding jumper shall be a wire, bus, screw, or similar suitable conductor. [250.102_(A)](https://2023.antflix.net#250.102_(A))", + "displayTitle": "(A) Material", + "children": [], + "url": "https://2023.antflix.net#250.102_(A)" + }, + { + "body": "Bonding jumpers shall be attached in the manner specified in 250.8 for circuits and equipment and in 250.70 for grounding electrodes. [250.102_(B)](https://2023.antflix.net#250.102_(B))", + "displayTitle": "(B) Attachment", + "children": [], + "url": "https://2023.antflix.net#250.102_(B)" + }, + { + "displayTitle": "(C) Size - Supply-Side Bonding Jumper", + "children": [ + { + "body": "The supply-side bonding jumper shall not be smaller than specified in Table 250.102(C)(1).Table 250.102(C)(1) Grounded Conductor, Main Bonding Jumper, System Bonding Jumper, and Supply-Side Bonding Jumper for Alternating-Current Systems Size of Largest Ungrounded Conductor or Equivalent Area for Parallel Conductors (AWG/kcmil) Size of Grounded Conductor or Bonding Jumper (AWG/kcmil) Copper Aluminum or Copper-Clad Aluminum Copper Aluminum or Copper-Clad Aluminum 2 or smaller 1/0 or smaller 8 6 1 or 1/0 2/0 or 3/0 6 4 2/0 or 3/0 4/0 or 250 4 2 Over 3/0 through 350 Over 250 through 500 2 1/0 Over 350 through 600 Over 500 through 900 1/0 3/0 Over 600 through 1100 Over 900 through 1750 2/0 4/0 Over 1100 Over 1750 See Notes 1 and 2. Notes:If the circular mil area of ungrounded supply conductors that are connected in parallel is larger than 1100 kcmil copper or 1750 kcmil aluminum, the grounded conductor or bonding jumper shall have an area not less than 121/2 percent of the area of the largest ungrounded supply conductor or equivalent area for parallel supply conductors. The grounded conductor or bonding jumper shall not be required to be larger than the largest ungrounded conductor or set of ungrounded conductors.If the circular mil area of ungrounded supply conductors that are connected in parallel is larger than 1100 kcmil copper or 1750 kcmil aluminum and if the ungrounded supply conductors and the bonding jumper are of different materials (copper, aluminum, or copper-clad aluminum), the minimum size of the grounded conductor or bonding jumper shall be based on the assumed use of ungrounded supply conductors of the same material as the grounded conductor or bonding jumper that has an ampacity equivalent to that of the installed ungrounded supply conductors.If there are no service-entrance conductors, the supply conductor size shall be determined by the equivalent size of the largest service-entrance conductor required for the load to be served. [250.102_(C)_(1)](https://2023.antflix.net#250.102_(C)_(1))", + "displayTitle": "(1) Size for Supply Conductors in a Single Raceway or Cable", + "children": [], + "url": "https://2023.antflix.net#250.102_(C)_(1)" + }, + { + "body": "If the ungrounded supply conductors are connected in parallel in two or more raceways or cables, the supply-side bonding jumper shall be sized in accordance with either of the following: An individual bonding jumper for each raceway or cable shall be selected from Table 250.102(C)(1) based on the size of the largest ungrounded supply conductor in each raceway or cable.A single bonding jumper installed for bonding two or more raceways or cables shall be sized in accordance with Table 250.102(C)(1) based on the sum of the circular mil areas of the largest ungrounded conductors from each set connected in parallel in each raceway or cable. The size of the grounded conductor(s) in each raceway or cable shall be based on the largest ungrounded conductor in each raceway or cable, or the sum of the circular mil areas of the largest ungrounded conductors from each set connected in parallel in each raceway or cable.Informational Note No. 1: The term supply conductors includes ungrounded conductors that do not have overcurrent protection on their supply side and terminate at service equipment or the first disconnecting means of a separately derived system.Informational Note No. 2: See Chapter 9, Table 8, for the circular mil area of conductors 18 AWG through 4/0 AWG. [250.102_(C)_(2)](https://2023.antflix.net#250.102_(C)_(2))", + "displayTitle": "(2) Size for Parallel Conductor Installations in Two or More Raceways or Cables", + "children": [], + "url": "https://2023.antflix.net#250.102_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#250.102_(C)" + }, + { + "body": "The equipment bonding jumper on the load side of an overcurrent device(s) shall be sized in accordance with 250.122. A single common continuous equipment bonding jumper shall be permitted to connect two or more raceways or cables if the bonding jumper is sized in accordance with 250.122 for the largest overcurrent device supplying circuits therein. [250.102_(D)](https://2023.antflix.net#250.102_(D))", + "displayTitle": "(D) Size - Equipment Bonding Jumper on Load Side of an Overcurrent Device", + "children": [], + "url": "https://2023.antflix.net#250.102_(D)" + }, + { + "body": "Bonding jumpers or conductors and equipment bonding jumpers shall be permitted to be installed inside or outside of a raceway or an enclosure. [250.102_(E)](https://2023.antflix.net#250.102_(E))", + "displayTitle": "(E) Installation", + "children": [ + { + "body": "If installed inside a raceway, equipment bonding jumpers and bonding jumpers or conductors shall comply with the requirements of 250.119 and 250.148. [250.102_(E)_(1)](https://2023.antflix.net#250.102_(E)_(1))", + "displayTitle": "(1) Inside a Raceway or an Enclosure", + "children": [], + "url": "https://2023.antflix.net#250.102_(E)_(1)" + }, + { + "body": "If installed on the outside, the length of the bonding jumper or conductor or equipment bonding jumper shall not exceed 1.8 m (6 ft) and shall be routed with the raceway or enclosure. Exception: An equipment bonding jumper or supply-side bonding jumper longer than 1.8 m (6 ft) shall be permitted at outside pole locations for the purpose of bonding or grounding isolated sections of metal raceways or elbows installed in exposed risers of metal conduit or other metal raceway, and for bonding grounding electrodes, and shall not be required to be routed with a raceway or enclosure. [250.102_(E)_(2)](https://2023.antflix.net#250.102_(E)_(2))", + "displayTitle": "(2) Outside a Raceway or an Enclosure", + "children": [], + "url": "https://2023.antflix.net#250.102_(E)_(2)" + }, + { + "body": "Bonding jumpers or conductors and equipment bonding jumpers shall be installed in accordance with 250.64(A) and (B). [250.102_(E)_(3)](https://2023.antflix.net#250.102_(E)_(3))", + "displayTitle": "(3) Protection", + "children": [], + "url": "https://2023.antflix.net#250.102_(E)_(3)" + } + ], + "url": "https://2023.antflix.net#250.102_(E)" + } + ], + "url": "https://2023.antflix.net#250.102" + }, + { + "displayTitle": "250.104 Bonding of Piping Systems and Exposed Structural Metal", + "children": [ + { + "body": "The metal water piping system shall be bonded as required in 250.104(A)(1), (A)(2), or (A)(3). [250.104_(A)](https://2023.antflix.net#250.104_(A))", + "displayTitle": "(A) Metal Water Piping", + "children": [ + { + "body": "Metal water piping system(s) installed in or attached to a building or structure shall be bonded to any of the following: Service equipment enclosureGrounded conductor at the serviceGrounding electrode conductor, if of sufficient sizeOne or more grounding electrodes used, if the grounding electrode conductor or bonding jumper to the grounding electrode is of sufficient sizeThe bonding jumper(s) shall be installed in accordance with 250.64(A), (B), and (E). The points of attachment of the bonding jumper(s) shall be accessible. The bonding jumper(s) shall be sized in accordance with Table 250.102(C)(1) except that it shall not be required to be larger than 3/0 copper or 250 kcmil aluminum or copper-clad aluminum and except as permitted in 250.104(A)(2) and (A)(3). [250.104_(A)_(1)](https://2023.antflix.net#250.104_(A)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#250.104_(A)_(1)" + }, + { + "body": "In buildings of multiple occupancy where the metal water piping system(s) installed in or attached to a building or structure for the individual occupancies is metallically isolated from all other occupancies by use of nonmetallic water piping, the metal water piping system(s) for each occupancy shall be permitted to be bonded to the equipment grounding terminal of the switchgear, switchboard, or panelboard enclosure (other than service equipment) supplying that occupancy. The bonding jumper shall be sized in accordance with 250.102(D). [250.104_(A)_(2)](https://2023.antflix.net#250.104_(A)_(2))", + "displayTitle": "(2) Buildings of Multiple Occupancy", + "children": [], + "url": "https://2023.antflix.net#250.104_(A)_(2)" + }, + { + "body": "The metal water piping system(s) installed in or attached to a building or structure shall be bonded to any of the following: Building or structure disconnecting means enclosure where located at the building or structureEquipment grounding conductor run with the supply conductorsOne or more grounding electrodes usedThe bonding jumper(s) shall be sized in accordance with 250.102(D). The bonding jumper shall not be required to be larger than the largest ungrounded feeder or branch-circuit conductor supplying the building or structure. [250.104_(A)_(3)](https://2023.antflix.net#250.104_(A)_(3))", + "displayTitle": "(3) Buildings or Structures Supplied by a Feeder(s) or Branch Circuit(s)", + "children": [], + "url": "https://2023.antflix.net#250.104_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#250.104_(A)" + }, + { + "body": "If installed in or attached to a building or structure, a metal piping system(s), including gas piping, that is likely to become energized shall be bonded to any of the following: Equipment grounding conductor for the circuit that is likely to energize the piping systemService equipment enclosureGrounded conductor at the serviceGrounding electrode conductor, if of sufficient sizeOne or more grounding electrodes used, if the grounding electrode conductor or bonding jumper to the grounding electrode is of sufficient sizeThe bonding conductor(s) or jumper(s) shall be sized in accordance with Table 250.122, and equipment grounding conductors shall be sized in accordance with Table 250.122 using the rating of the circuit that is likely to energize the piping system(s). The points of attachment of the bonding jumper(s) shall be accessible.Informational Note No. 1: Bonding all piping and metal air ducts within the premises will provide additional safety.Informational Note No. 2: See NFPA 54, National Fuel Gas Code, and NFPA 780, Standard for the Installation of Lightning Protection Systems, for information on gas piping systems. [250.104_(B)](https://2023.antflix.net#250.104_(B))", + "displayTitle": "(B) Other Metal Piping", + "children": [], + "url": "https://2023.antflix.net#250.104_(B)" + }, + { + "body": "Exposed structural metal that is interconnected to form a metal building frame, is not intentionally grounded or bonded, and is likely to become energized shall be bonded to any of the following: Service equipment enclosureGrounded conductor at the serviceDisconnecting means for buildings or structures supplied by a feeder or branch circuitGrounding electrode conductor, if not smaller than a conductor sized in accordance with Table 250.102(C)(1)One or more grounding electrodes used, if the grounding electrode conductor or bonding jumper to the grounding electrode is not smaller than a conductor sized in accordance with Table 250.102(C)(1)The bonding conductor(s) or jumper(s) shall be sized in accordance with Table 250.102(C)(1), except that it shall not be required to be larger than 3/0 AWG copper or 250 kcmil aluminum or copper-clad aluminum, and installed in accordance with 250.64(A), (B), and (E). The points of attachment of the bonding jumper(s) shall be accessible unless installed in compliance with 250.68(A), Exception No. 2. [250.104_(C)](https://2023.antflix.net#250.104_(C))", + "displayTitle": "(C) Structural Metal", + "children": [], + "url": "https://2023.antflix.net#250.104_(C)" + }, + { + "body": "Metal water piping systems and structural metal that is interconnected to form a building frame shall be bonded to separately derived systems in accordance with 250.104(D)(1) through (D)(3). [250.104_(D)](https://2023.antflix.net#250.104_(D))", + "displayTitle": "(D) Separately Derived Systems", + "children": [ + { + "body": "The grounded conductor of each separately derived system shall be bonded to the nearest accessible point of the metal water piping system(s) in the area served by each separately derived system. This connection shall be made at the same point on the separately derived system where the grounding electrode conductor is connected. Each bonding jumper shall be sized in accordance with Table 250.102(C)(1) based on the largest ungrounded conductor of the separately derived system except that it shall not be required to be larger than 3/0 AWG copper or 250 kcmil aluminum or copper-clad aluminum. Exception No. 1: A separate bonding jumper to the metal water piping system shall not be required if the metal water piping system is used as the grounding electrode or grounding electrode conductor for the separately derived system and the connection to the water piping system is in the area served by the separately derived system. Exception No. 2: A separate bonding jumper to the metal water piping system shall not be required if the metal in-ground support structure is used as a grounding electrode or the metal frame of a building or structure is used as the grounding electrode conductor for a separately derived system and is bonded to the metal water piping system in the area served by the separately derived system. [250.104_(D)_(1)](https://2023.antflix.net#250.104_(D)_(1))", + "displayTitle": "(1) Metal Water Piping System(s)", + "children": [], + "url": "https://2023.antflix.net#250.104_(D)_(1)" + }, + { + "body": "If exposed structural metal that is interconnected to form the building frame exists in the area served by the separately derived system, it shall be bonded to the grounded conductor of each separately derived system. This connection shall be made at the same point on the separately derived system where the grounding electrode conductor is connected. Each bonding jumper shall be sized in accordance with Table 250.102(C)(1) based on the largest ungrounded conductor of the separately derived system except that it shall not be required to be larger than 3/0 AWG copper or 250 kcmil aluminum or copper-clad aluminum. Exception No. 1: A separate bonding jumper to the building structural metal shall not be required if the metal in-ground support structure is used as a grounding electrode or the metal frame of a building or structure is used as the grounding electrode conductor for the separately derived system. Exception No. 2: A separate bonding jumper to the building structural metal shall not be required if the water piping system of a building or structure is used as the grounding electrode or grounding electrode conductor for a separately derived system and is bonded to the building structural metal in the area served by the separately derived system. [250.104_(D)_(2)](https://2023.antflix.net#250.104_(D)_(2))", + "displayTitle": "(2) Structural Metal", + "children": [], + "url": "https://2023.antflix.net#250.104_(D)_(2)" + }, + { + "body": "If a common grounding electrode conductor is installed for multiple separately derived systems as permitted by 250.30(A)(6), and exposed structural metal that is interconnected to form the building frame or interior metal water piping exists in the area served by the separately derived system, the metal water piping and the structural metal member shall be bonded to the common grounding electrode conductor in the area served by the separately derived system. Exception: A separate bonding jumper from each derived system to metal water piping and to structural metal members shall not be required if the metal water piping and the structural metal members in the area served by the separately derived system are bonded to the common grounding electrode conductor. [250.104_(D)_(3)](https://2023.antflix.net#250.104_(D)_(3))", + "displayTitle": "(3) Common Grounding Electrode Conductor", + "children": [], + "url": "https://2023.antflix.net#250.104_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#250.104_(D)" + } + ], + "url": "https://2023.antflix.net#250.104" + }, + { + "body": "The lightning protection system ground terminals shall be bonded to the building or structure grounding electrode system. Informational Note No. 1: See 250.60 for use of strike termination devices. Informational Note No. 2: See NFPA 780, Standard for the Installation of Lightning Protection Systems, which contains detailed information on grounding, bonding, and side-flash distance from lightning protection systems. [250.106](https://2023.antflix.net#250.106)", + "displayTitle": "250.106 Lightning Protection Systems", + "children": [], + "url": "https://2023.antflix.net#250.106" + }, + { + "displayTitle": "Part VI Equipment Grounding and Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#divider_3_VI" + }, + { + "body": "Metal enclosures shall be permitted to be used to connect bonding jumpers or equipment grounding conductors, or both, together to become a part of an effective ground-fault current path. If installed, metal covers, plaster rings, extension rings, and metal fittings shall be attached to these metal enclosures to ensure an effective ground-fault current path or shall be connected with bonding jumpers or equipment grounding conductors, or both. Informational Note: See 250.97 for bonding requirements for over 250 volts to ground. [250.109](https://2023.antflix.net#250.109)", + "displayTitle": "250.109 Metal Enclosures", + "children": [], + "url": "https://2023.antflix.net#250.109" + }, + { + "body": "Exposed, normally non-current-carrying metal parts of fixed equipment supplied by or enclosing conductors or components that are likely to become energized shall be connected to an equipment grounding conductor under any of the following conditions: If within 2.5 m (8 ft) vertically or 1.5 m (5 ft) horizontally of ground or grounded metal objects and subject to contact by personsIf located in a wet or damp location and not isolatedIf in electrical contact with metalIf in a hazardous (classified) locationIf supplied by a wiring method that provides an equipment grounding conductor, except as permitted by 250.86, Exception No. 2, for short sections of metal enclosuresIf equipment operates with any terminal at over 150 volts to groundException No. 1: If exempted by special permission, the metal frame of electrically heated appliances that have the frame permanently and effectively insulated from ground shall not be required to be grounded.Exception No. 2: Distribution apparatus, such as transformer and capacitor cases, mounted on wooden poles at a height exceeding 2.5 m (8 ft) above ground or grade level shall not be required to be grounded.Exception No. 3: Listed equipment protected by a system of double insulation, or its equivalent, shall not be required to be connected to the equipment grounding conductor. If such a system is employed, the equipment shall be distinctively marked. [250.110](https://2023.antflix.net#250.110)", + "displayTitle": "250.110 Equipment Fastened in Place (Fixed) or Connected by Permanent Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#250.110" + }, + { + "body": "Except as permitted in 250.112(F) and (I), exposed, normally non-current-carrying metal parts of equipment described in 250.112(A) through (K), and normally non-current-carrying metal parts of equipment and enclosures described in 250.112(L) and (M), shall be connected to an equipment grounding conductor, regardless of voltage. [250.112](https://2023.antflix.net#250.112)", + "displayTitle": "250.112 Specific Equipment Fastened in Place (Fixed) or Connected by Permanent Wiring Methods", + "children": [ + { + "body": "Switchgear or switchboard frames and structures supporting switching equipment, except frames of 2-wire dc switchgear or switchboards if effectively insulated from ground. [250.112_(A)](https://2023.antflix.net#250.112_(A))", + "displayTitle": "(A) Switchgear and Switchboard Frames and Structures", + "children": [], + "url": "https://2023.antflix.net#250.112_(A)" + }, + { + "body": "Generator and motor frames in an electrically operated pipe organ, unless effectively insulated from ground and the motor driving it. [250.112_(B)](https://2023.antflix.net#250.112_(B))", + "displayTitle": "(B) Pipe Organs", + "children": [], + "url": "https://2023.antflix.net#250.112_(B)" + }, + { + "body": "Motor frames, as provided by 430.242. [250.112_(C)](https://2023.antflix.net#250.112_(C))", + "displayTitle": "(C) Motor Frames", + "children": [], + "url": "https://2023.antflix.net#250.112_(C)" + }, + { + "body": "Enclosures for motor controllers unless attached to ungrounded portable equipment. [250.112_(D)](https://2023.antflix.net#250.112_(D))", + "displayTitle": "(D) Enclosures for Motor Controllers", + "children": [], + "url": "https://2023.antflix.net#250.112_(D)" + }, + { + "body": "Electrical equipment for elevators and cranes. [250.112_(E)](https://2023.antflix.net#250.112_(E))", + "displayTitle": "(E) Elevators and Cranes", + "children": [], + "url": "https://2023.antflix.net#250.112_(E)" + }, + { + "body": "Electrical equipment in commercial garages, theaters, and motion picture studios, except pendant lampholders supplied by circuits not over 150 volts to ground. [250.112_(F)](https://2023.antflix.net#250.112_(F))", + "displayTitle": "(F) Garages, Theaters, and Motion Picture Studios", + "children": [], + "url": "https://2023.antflix.net#250.112_(F)" + }, + { + "body": "Electric signs, outline lighting, and associated equipment as provided in 600.7. [250.112_(G)](https://2023.antflix.net#250.112_(G))", + "displayTitle": "(G) Electric Signs", + "children": [], + "url": "https://2023.antflix.net#250.112_(G)" + }, + { + "body": "Motion picture projection equipment. [250.112_(H)](https://2023.antflix.net#250.112_(H))", + "displayTitle": "(H) Motion Picture Projection Equipment", + "children": [], + "url": "https://2023.antflix.net#250.112_(H)" + }, + { + "body": "Equipment supplied by Class 1 circuits shall be grounded unless operating at less than 50 volts. Equipment supplied by Class 1 power-limited circuits, by Class 2 and Class 3 remote-control and signaling circuits, and by fire alarm circuits shall be grounded if system grounding is required by Part II or Part VIII of this article. [250.112_(I)](https://2023.antflix.net#250.112_(I))", + "displayTitle": "(I) Remote-Control, Signaling, and Fire Alarm Circuits", + "children": [], + "url": "https://2023.antflix.net#250.112_(I)" + }, + { + "body": "Luminaires as provided in Part V of Article 410. [250.112_(J)](https://2023.antflix.net#250.112_(J))", + "displayTitle": "(J) Luminaires", + "children": [], + "url": "https://2023.antflix.net#250.112_(J)" + }, + { + "body": "Permanently mounted electrical equipment and skids shall be connected to the equipment grounding conductor. Wire-type equipment grounding conductors shall be sized as required by 250.122. [250.112_(K)](https://2023.antflix.net#250.112_(K))", + "displayTitle": "(K) Skid-Mounted Equipment", + "children": [], + "url": "https://2023.antflix.net#250.112_(K)" + }, + { + "body": "Motor-operated water pumps, including the submersible type. [250.112_(L)](https://2023.antflix.net#250.112_(L))", + "displayTitle": "(L) Motor-Operated Water Pumps", + "children": [], + "url": "https://2023.antflix.net#250.112_(L)" + }, + { + "body": "If a submersible pump is used in a metal well casing, the well casing shall be connected to the pump circuit equipment grounding conductor. [250.112_(M)](https://2023.antflix.net#250.112_(M))", + "displayTitle": "(M) Metal Well Casings", + "children": [], + "url": "https://2023.antflix.net#250.112_(M)" + } + ], + "url": "https://2023.antflix.net#250.112" + }, + { + "body": "Exposed, normally non-current-carrying metal parts of cord-and-plug-connected equipment shall be connected to the equipment grounding conductor under any of the following conditions: Exception: Listed tools, listed appliances, and listed equipment covered in 250.114, list items 2 through 4, shall not be required to be connected to an equipment grounding conductor if protected by a system of double insulation or its equivalent. Double-insulated equipment shall be distinctively marked.In hazardous (classified) locationsIf operated at over 150 volts to groundException No. 1 to (2): Motors, if guarded, shall not be required to be connected to an equipment grounding conductor.Exception No. 2 to (2): Metal frames of electrically healed appliances, exempted by special permission, shall not be required to be connected to an equipment grounding conductor, in which case the frames shall be permanently and effectively insulated from ground.In residential occupancies:Refrigerators, freezers, icemakers, and air conditionersClothes-washing, clothes-drying, and dish-washing machines; ranges; kitchen waste disposers; information technology equipment; sump pumps; and electrical aquarium equipmentHand-held motor-operated tools, stationary and fixed motor-operated tools, and light industrial motor-operated toolsMotor-operated appliances of the following types: hedge clippers, lawn mowers, snow blowers, and wet scrubbersPortable handlampsIn other than residential occupancies:Refrigerators, freezers, icemakers, and air conditionersClothes-washing, clothes-drying, and dish-washing machines; information technology equipment; sump pumps; and electrical aquarium equipmentHand-held motor-operated tools, stationary and fixed motor-operated tools, and light industrial motor-operated toolsMotor-operated appliances of the following types: hedge clippers, lawn mowers, snow blowers, and wet scrubbersPortable handlampsCord-and-plug-connected appliances used in damp or wet locations or by persons standing on the ground, standing on metal floors, or working inside of metal tanks or boilersTools likely to be used in wet or conductive locationsException: Tools and portable handlamps and portable luminaires likely to be used in wet or conductive locations shall not be required to be connected to an equipment grounding conductor if supplied through an isolating transformer with an ungrounded secondary of not over 50 volts. [250.114](https://2023.antflix.net#250.114)", + "displayTitle": "250.114 Equipment Connected by Cord and Plug", + "children": [], + "url": "https://2023.antflix.net#250.114" + }, + { + "body": "The metal parts of the following nonelectrical equipment described in this section shall be connected to the equipment grounding conductor: Frames and tracks of electrically operated cranes and hoistsFrames of nonelectrically driven elevator cars to which electrical conductors are attachedHand-operated metal shifting ropes or cables of electric elevatorsInformational Note: If extensive metal in or on buildings or structures may become energized and is subject to personal contact, adequate bonding and grounding will provide additional safety. [250.116](https://2023.antflix.net#250.116)", + "displayTitle": "250.116 Nonelectrical Equipment", + "children": [], + "url": "https://2023.antflix.net#250.116" + }, + { + "displayTitle": "250.118 Types of Equipment Grounding Conductors", + "children": [ + { + "body": "Each equipment grounding conductor run with or enclosing the circuit conductors shall be one or more or a combination of the following: A copper, aluminum, or copper-clad aluminum conductor. This conductor shall be solid or stranded; insulated, covered, or bare; and in the form of a wire or a busbar of any shape.Rigid metal conduit.Intermediate metal conduit.Electrical metallic tubing.Listed flexible metal conduit meeting all the following conditions:The conduit is terminated in listed fittings.The circuit conductors contained in the conduit are protected by overcurrent devices rated at 20 amperes or less.The size of the conduit does not exceed metric designator 35 (trade size 11/4).The combined length of flexible metal conduit, flexible metallic tubing, and liquidtight flexible metal conduit in the same effective ground-fault current path does not exceed 1.8 m (6 ft).If flexibility is necessary to minimize the transmission of vibration from equipment or to provide flexibility for equipment that requires movement after installation, a wire-type equipment grounding conductor or a bonding jumper in accordance with 250.102(E)(2) shall be installed.If flexible metal conduit is constructed of stainless steel, a wire-type equipment grounding conductor or bonding jumper in accordance with 250.102(E)(2) shall be installed.Listed liquidtight flexible metal conduit meeting all the following conditions:The conduit is terminated in listed fittings.For metric designators 12 through 16 (trade sizes 3/8 through 1/2), the circuit conductors contained in the conduit are protected by overcurrent devices rated at 20 amperes or less.For metric designators 21 through 35 (trade sizes 3/4 through 11/4), the circuit conductors contained in the conduit are protected by overcurrent devices rated not more than 60 amperes and there is no flexible metal conduit, flexible metallic tubing, or liquidtight flexible metal conduit in metric designators 12 through 16 (trade sizes 3/8 through 1/2) in the effective ground-fault current path.The combined length of flexible metal conduit, flexible metallic tubing, and liquidtight flexible metal conduit in the same effective ground-fault current path does not exceed 1.8 m (6 ft).If flexibility is necessary to minimize the transmission of vibration from equipment or to provide flexibility for equipment that requires movement after installation, a wire-type equipment grounding conductor or a bonding jumper in accordance with 250.102(E)(2) shall be installed.If liquidtight flexible metal conduit contains a stainless steel core, a wire-type equipment grounding conductor or a bonding jumper in accordance with 250.102(E)(2) shall be installed.Flexible metallic tubing if the tubing is terminated in listed fittings and meeting the following conditions:The circuit conductors contained in the tubing are protected by overcurrent devices rated at 20 amperes or less.The combined length of flexible metal conduit, flexible metallic tubing, and liquidtight flexible metal conduit in the same effective ground-fault current path does not exceed 1.8 m (6 ft).Armor of Type AC cable as provided in 320.108.The copper sheath of mineral-insulated, metal-sheathed cable Type MI.Type MC cable that provides an effective ground-fault current path in accordance with one or more of the following:It contains an insulated or uninsulated equipment grounding conductor in compliance with 250.118(1).The combined metallic sheath and uninsulated equipment grounding/bonding conductor of interlocked metal tape-type MC cable that is listed and identified as an equipment grounding conductorThe metallic sheath or the combined metallic sheath and equipment grounding conductors of the smooth or corrugated tube-type MC cable that is listed and identified as an equipment grounding conductorCable trays as permitted in 392.10 and 392.60.Cablebus framework as permitted in 370.60(1).Other listed electrically continuous metal raceways and listed auxiliary gutters.Surface metal raceways listed for grounding.Informational Note: See Article 100 for a definition of effective ground-fault current path. [250.118_(A)](https://2023.antflix.net#250.118_(A))", + "displayTitle": "(A) Permitted", + "children": [], + "url": "https://2023.antflix.net#250.118_(A)" + }, + { + "body": "The following shall not be used as equipment grounding conductors. Grounding electrode conductorsException: A wire-type equipment grounding conductor installed in compliance with 250.6(A) and the applicable requirements for both the equipment grounding conductor and the grounding electrode conductor in Parts II. III, and VI of this article shall be permitted to serve as both an equipment grounding conductor and a grounding electrode conductor.Structural metal frame of a building or structure [250.118_(B)](https://2023.antflix.net#250.118_(B))", + "displayTitle": "(B) Not Permitted", + "children": [], + "url": "https://2023.antflix.net#250.118_(B)" + } + ], + "url": "https://2023.antflix.net#250.118" + }, + { + "displayTitle": "250.119 Identification of Wire-Type Equipment Grounding Conductors", + "children": [ + { + "body": "Unless required elsewhere in this Code, equipment grounding conductors shall be permitted to be bare, covered, or insulated. Individually covered or insulated equipment grounding conductors of the wire type shall have a continuous outer finish that is either green or green with one or more yellow stripes except as permitted in this section. Conductors with insulation or individual covering that is green, green with one or more yellow stripes, or otherwise identified as permitted by this section shall not be used for ungrounded or grounded circuit conductors. Exception No. 1: Power-limited Class 2 or Class 3 cables, power-limited fire alarm cables, or communications cables containing only circuits operating at less than 50 volts ac or 60 volts dc if connected to equipment not required to be grounded shall be permitted to use a conductor with green insulation or green with one or more yellow stripes for other than equipment grounding purposes. Exception No. 2: Flexible cords having an integral insulation and jacket without an equipment grounding conductor shall be permitted to have a continuous outer finish that is green. Informational Note: An example of a flexible cord with integral-type insulation is Type SPT-2, 2 conductor. Exception No. 3: Conductors with green insulation shall be permitted to be used as ungrounded signal conductors where installed between the output terminations of traffic signal control and traffic signal indicating heads. Signaling circuits installed in accordance with this exception shall include an equipment grounding conductor in accordance with 250.118. Wire-type equipment grounding conductors shall be bare or have insulation or covering that is green with one or more yellow stripes. [250.119_(A)](https://2023.antflix.net#250.119_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#250.119_(A)" + }, + { + "body": "Equipment grounding conductors 4 AWG and larger shall comply with the following: At the time of installation, if the insulation does not comply with 250.119(A), it shall be permanently identified as an equipment grounding conductor at each end and at every point where the conductor is accessible.Exception: Conductors 4 AWG and larger shall not be required to be marked in conduit bodies that contain no splices or unused hubs.Identification shall encircle the conductor and shall be accomplished by one of the following:Stripping the insulation or covering from the entire exposed lengthColoring the insulation or covering green at the terminationMarking the insulation or covering with green tape or green adhesive labels at the termination [250.119_(B)](https://2023.antflix.net#250.119_(B))", + "displayTitle": "(B) Conductors 4 AWG and Larger", + "children": [], + "url": "https://2023.antflix.net#250.119_(B)" + }, + { + "body": "One or more insulated conductors in a multiconductor cable, at the time of installation, shall be permitted to be permanently identified as equipment grounding conductors at each end and at every point where the conductors are accessible by one of the following means: Stripping the insulation from the entire exposed length.Coloring the exposed insulation green.Marking the exposed insulation with green tape or green adhesive labels. Identification shall encircle the conductor. [250.119_(C)](https://2023.antflix.net#250.119_(C))", + "displayTitle": "(C) Multiconductor Cable", + "children": [], + "url": "https://2023.antflix.net#250.119_(C)" + }, + { + "body": "Equipment grounding conductors in flexible cords shall be insulated and shall have a continuous outer finish that is either green or green with one or more yellow stripes. [250.119_(D)](https://2023.antflix.net#250.119_(D))", + "displayTitle": "(D) Flexible Cord", + "children": [], + "url": "https://2023.antflix.net#250.119_(D)" + } + ], + "url": "https://2023.antflix.net#250.119" + }, + { + "body": "An equipment grounding conductor shall be installed in accordance with 250.120(A), (B), and (C). [250.120](https://2023.antflix.net#250.120)", + "displayTitle": "250.120 Equipment Grounding Conductor Installation", + "children": [ + { + "body": "If it consists of a raceway, cable tray, cable armor, cablebus framework, or cable sheath or if it is a wire within a raceway or cable, it shall be installed in accordance with the applicable provisions in this Code using fittings for joints and terminations approved for use with the type of raceway or cable used. All connections, joints, and fittings shall be made tight using suitable tools. Informational Note: See the UL Guide Information for Electrical Circuit Integrity Systems (FHIT) for equipment grounding conductors installed in a raceway that are part of a listed electrical circuit protective system or a listed fire-resistive cable system. [250.120_(A)](https://2023.antflix.net#250.120_(A))", + "displayTitle": "(A) Raceway. Cable Trays, Cable Armor, Cablebus, or Cable Sheaths", + "children": [], + "url": "https://2023.antflix.net#250.120_(A)" + }, + { + "body": "Equipment grounding conductors of bare, covered, or insulated aluminum or copper-clad aluminum shall comply with the following: Unless part of an applicable cable wiring method, bare or covered conductors shall not be installed if subject to corrosive conditions or be installed in direct contact with concrete, masonry, or the earth.Terminations made within outdoor enclosures that are listed and identified for the environment shall be permitted within 450 mm (18 in.) of the bottom of the enclosure.Aluminum or copper-clad aluminum conductors external to buildings or enclosures shall not be terminated within 450 mm (18 in.) of the earth, unless terminated within a listed wire connector system. [250.120_(B)](https://2023.antflix.net#250.120_(B))", + "displayTitle": "(B) Aluminum and Copper-Clad Aluminum Conductors", + "children": [], + "url": "https://2023.antflix.net#250.120_(B)" + }, + { + "body": "If not routed with circuit conductors as permitted in 250.130(C) and 250.134, Exception No. 2, equipment grounding conductors smaller than 6 AWG shall be protected from physical damage by an identified raceway or cable armor unless installed within hollow spaces of the framing members of buildings or structures and if not subject to physical damage. [250.120_(C)](https://2023.antflix.net#250.120_(C))", + "displayTitle": "(C) Equipment Grounding Conductors Smaller Than 6 AWG", + "children": [], + "url": "https://2023.antflix.net#250.120_(C)" + } + ], + "url": "https://2023.antflix.net#250.120" + }, + { + "body": "Table 250.122 Minimum Size Equipment Grounding Conductors for Grounding Raceway and Equipment Rating or Setting of Automatic Overcurrent Device in Circuit Ahead of Equipment, Conduit, etc., Not Exceeding (Amperes) Size (AWG or kcmil) Copper Aluminum or Copper-Clad Aluminum* 15 14 12 20 12 10 60 10 8 100 8 6 200 6 4 300 4 2 400 3 1 500 2 1/0 600 1 2/0 800 1/0 3/0 1000 2/0 4/0 1200 3/0 250 1600 4/0 350 2000 250 400 2500 350 600 3000 400 600 4000 500 750 5000 700 1250 6000 800 1250 Note: Where necessary to comply with 250.4(A)(5) or (B)(4), the equipment grounding conductor shall be sized larger than given in this table. *See installation restrictions in 250.120. [250.122](https://2023.antflix.net#250.122)", + "displayTitle": "250.122 Size of Equipment Grounding Conductors", + "children": [ + { + "body": "Copper, aluminum, or copper-clad aluminum equipment grounding conductors of the wire type shall not be smaller than shown in Table 250.122. The equipment grounding conductor shall not be required to be larger than the circuit conductors supplying the equipment. If a cable tray, a raceway, or a cable armor or sheath is used as the equipment grounding conductor, as provided in 250.118 and 250.134(1), it shall comply with 250.4(A)(5) or (B)(4). Equipment grounding conductors shall be permitted to be sectioned within a multiconductor cable, provided the combined circular mil area complies with. Table 250.122. [250.122_(A)](https://2023.antflix.net#250.122_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#250.122_(A)" + }, + { + "body": "If ungrounded conductors are increased in size for any reason other than as required in 310.15(B) or 310.15(C), wire-type equipment grounding conductors, if installed, shall be increased in size proportionately to the increase in circular mil area of the ungrounded conductors. Exception: Equipment grounding conductors shall be permitted to be sized by a qualified person to provide an effective ground fault current path in accordance with 250.4(A)(5) or (B)(4) [250.122_(B)](https://2023.antflix.net#250.122_(B))", + "displayTitle": "(B) Increased in Size", + "children": [], + "url": "https://2023.antflix.net#250.122_(B)" + }, + { + "body": "A single equipment grounding conductor shall be permitted to be installed for multiple circuits that are installed in the same raceway, cable, trench, or cable tray. It shall be sized from Table 250.122 for the largest overcurrent device protecting circuit conductors in the raceway, cable, trench, or cable tray. Equipment grounding conductors installed in cable trays shall meet the minimum requirements of 392.10(B)(1)(c). [250.122_(C)](https://2023.antflix.net#250.122_(C))", + "displayTitle": "(C) Multiple Circuits", + "children": [], + "url": "https://2023.antflix.net#250.122_(C)" + }, + { + "body": "Equipment grounding conductors for motor circuits shall be sized in accordance with 250.122(D)(1) or (D)(2). [250.122_(D)](https://2023.antflix.net#250.122_(D))", + "displayTitle": "(D) Motor Circuits", + "children": [ + { + "body": "The equipment grounding conductor size shall not be smaller than determined by 250.122(A) based on the rating of the branch-circuit short-circuit and ground-fault protective device. [250.122_(D)_(1)](https://2023.antflix.net#250.122_(D)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#250.122_(D)_(1)" + }, + { + "body": "If the overcurrent device is an instantaneous-trip circuit breaker or a motor short-circuit protector, the equipment grounding conductor shall be sized not smaller than that given by 250.122(A) using the maximum permitted rating of a dual element time-delay fuse selected for branch-circuit short-circuit and ground-fault protection in accordance with 430.52(C)(1)(a). [250.122_(D)_(2)](https://2023.antflix.net#250.122_(D)_(2))", + "displayTitle": "(2) Instantaneous-Trip Circuit Breaker and Motor Short-Circuit Protector", + "children": [], + "url": "https://2023.antflix.net#250.122_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#250.122_(D)" + }, + { + "body": "The equipment grounding conductor in a flexible cord with the largest circuit conductor 10 AWG or smaller, and the equipment grounding conductor used with fixture wires of any size in accordance with 240.5, shall not be smaller than 18 AWG copper and shall not be smaller than the circuit conductors. The equipment grounding conductor in a flexible cord with a circuit conductor larger than 10 AWG shall be sized in accordance with Table 250.122. [250.122_(E)](https://2023.antflix.net#250.122_(E))", + "displayTitle": "(E) Flexible Cord and Fixture Wire", + "children": [], + "url": "https://2023.antflix.net#250.122_(E)" + }, + { + "body": "For circuits of parallel conductors as permitted in 310.10(G), the equipment grounding conductor shall be installed in accordance with 250.122(F)(1) or (F)(2). [250.122_(F)](https://2023.antflix.net#250.122_(F))", + "displayTitle": "(F) Conductors in Parallel", + "children": [ + { + "body": "Single Raceway or Cable Tray, Auxiliary Gutter, or Cable Tray. If circuit conductors are connected in parallel in the same raceway, auxiliary gutter, or cable tray, a single wire-type conductor shall be permitted as the equipment grounding conductor. The wire-type equipment grounding conductor shall be sized in accordance with 250.122 based on the overcurrent protective device for the feeder or branch circuit.Multiple Raceways. If conductors are installed in multiple raceways and are connected in parallel, a wire-type equipment grounding conductor, if used, shall be installed in each raceway and shall be connected in parallel. The equipment grounding conductor installed in each raceway shall be sized in accordance with 250.122 based on the rating of the overcurrent protective device for the feeder or branch circuit.Wire-Type Equipment Grounding Conductors in Cable Trays. Wire-type equipment grounding conductors installed in cable trays shall meet the minimum requirements of 392.10(B)(1)(c).Metal Raceways, Auxiliary Gutters, or Cable Trays. Metal raceways or auxiliary gutters in accordance with 250.118 or cable trays complying with 392.60(B) shall be permitted as the equipment grounding conductor. [250.122_(F)_(1)](https://2023.antflix.net#250.122_(F)_(1))", + "displayTitle": "(1) Conductor Installations in Raceways, Auxiliary Gutters, or Cable Trays", + "children": [], + "url": "https://2023.antflix.net#250.122_(F)_(1)" + }, + { + "body": "Except as provided in 250.122(F)(2)(c) for raceway or cable tray installations, the equipment grounding conductor in each multiconductor cable shall be sized in accordance with 250.122 based on the overcurrent protective device for the feeder or branch circuit.If circuit conductors of multiconductor cables are connected in parallel, the equipment grounding conductor(s) in each cable shall be connected in parallel.If multiconductor cables are paralleled in the same raceway, auxiliary gutter, or cable tray, a single equipment grounding conductor that is sized in accordance with 250.122 shall be permitted in combination with the equipment grounding conductors provided within the multiconductor cables and shall all be connected together.Equipment grounding conductors installed in cable trays shall meet the minimum requirements of 392.10(B)(1)(c). Cable trays complying with 392.60(B), metal raceways in accordance with 250.118, or auxiliary gutters shall be permitted as the equipment grounding conductor. [250.122_(F)_(2)](https://2023.antflix.net#250.122_(F)_(2))", + "displayTitle": "(2) Multiconductor Cables", + "children": [], + "url": "https://2023.antflix.net#250.122_(F)_(2)" + } + ], + "url": "https://2023.antflix.net#250.122_(F)" + }, + { + "body": "Equipment grounding conductors installed with feeder taps shall not be smaller than shown in Table 250.122 based on the rating of the overcurrent device ahead of the feeder on the supply side ahead of the tap but shall not be required to be larger than the tap conductors. [250.122_(G)](https://2023.antflix.net#250.122_(G))", + "displayTitle": "(G) Feeder Taps", + "children": [], + "url": "https://2023.antflix.net#250.122_(G)" + } + ], + "url": "https://2023.antflix.net#250.122" + }, + { + "displayTitle": "250.124 Equipment Grounding Conductor Continuity", + "children": [ + { + "body": "Separable connections such as those provided in drawout equipment or attachment plugs and mating connectors and receptacles shall provide for first-make, last-break of the equipment grounding conductor. First-make, last-break shall not be required if interlocked equipment, plugs, receptacles, and connectors preclude energization without grounding continuity. [250.124_(A)](https://2023.antflix.net#250.124_(A))", + "displayTitle": "(A) Separable Connections", + "children": [], + "url": "https://2023.antflix.net#250.124_(A)" + }, + { + "body": "No automatic cutout or switch shall be placed in the equipment grounding conductor of a premises wiring system unless the opening of the cutout or switch disconnects all sources of energy. [250.124_(B)](https://2023.antflix.net#250.124_(B))", + "displayTitle": "(B) Switches", + "children": [], + "url": "https://2023.antflix.net#250.124_(B)" + } + ], + "url": "https://2023.antflix.net#250.124" + }, + { + "body": "The terminal for the connection of the equipment grounding conductor shall be identified by one of the following: A green, not readily removable terminal screw with a hexagonal head.A green, hexagonal, not readily removable terminal nut.A green pressure wire connector. If the terminal for the equipment grounding conductor is not visible, the conductor entrance hole shall be marked with the word green or ground, the letters G or GR, a grounding symbol, or otherwise identified by a distinctive green color. If the terminal for the equipment grounding conductor is readily removable, the area adjacent to the terminal shall be similarly marked.Informational Note: See Informational Note Figure 250.126.Informational Note Figure 250.126 One Example of a Symbol Used to Identify the Grounding Termination Point for an Equipment Grounding Conductor. [250.126](https://2023.antflix.net#250.126)", + "displayTitle": "250.126 Identification of Wiring Device Terminals", + "children": [], + "url": "https://2023.antflix.net#250.126" + }, + { + "displayTitle": "Part VII Methods of Equipment Grounding Conductor Connections", + "children": [], + "url": "https://2023.antflix.net#divider_3_VII" + }, + { + "body": "Equipment grounding conductor connections at the source of separately derived systems shall be made in accordance with 250.30(A)(1). Equipment grounding conductor connections at service equipment shall be made as indicated in 250.130(A) or (B). For replacement of non-grounding-type receptacles with grounding-type receptacles, or snap switches without an equipment grounding terminal with snap switches with an equipment grounding terminal, and for branch-circuit extensions only in existing installations that do not have an equipment grounding conductor in the branch circuit, connections shall be permitted as indicated in 250.130(C). [250.130](https://2023.antflix.net#250.130)", + "displayTitle": "250.130 Equipment Grounding Conductor Connections", + "children": [ + { + "body": "The connection shall be made by bonding the equipment grounding conductor to the grounded service conductor and the grounding electrode conductor. [250.130_(A)](https://2023.antflix.net#250.130_(A))", + "displayTitle": "(A) For Grounded Systems", + "children": [], + "url": "https://2023.antflix.net#250.130_(A)" + }, + { + "body": "The connection shall be made by bonding the equipment grounding conductor to the grounding electrode conductor. [250.130_(B)](https://2023.antflix.net#250.130_(B))", + "displayTitle": "(B) For Ungrounded Systems", + "children": [], + "url": "https://2023.antflix.net#250.130_(B)" + }, + { + "body": "The equipment grounding conductor that is connected to a grounding-type receptacle, a snap switch with an equipment grounding terminal, or a branch-circuit extension shall be permitted to be connected to any of the following: Any accessible point on the grounding electrode system as described in 250.50Any accessible point on the grounding electrode conductorThe equipment grounding terminal bar within the enclosure where the branch circuit for the receptacle or branch circuit originatesAn equipment grounding conductor that is part of another branch circuit that originates from the enclosure where the branch circuit for the receptacle, snap switch, or branch circuit originatesFor grounded systems, the grounded service conductor within the service equipment enclosureFor ungrounded systems, the grounding terminal bar within the service equipment enclosureInformational Note No. 1: See 406.4(D) for the use of a ground-fault circuit-interrupting type of receptacle.Informational Note No. 2: See 404.9(B) for requirements regarding grounding of snap switches. [250.130_(C)](https://2023.antflix.net#250.130_(C))", + "displayTitle": "(C) Replacement of Nongrounding Receptacle or Snap Switch and Branch Circuit Extensions", + "children": [], + "url": "https://2023.antflix.net#250.130_(C)" + } + ], + "url": "https://2023.antflix.net#250.130" + }, + { + "body": "Isolated sections of metal raceway or cable armor, if required to be connected to an equipment grounding conductor, shall be connected in accordance with 250.134. [250.132](https://2023.antflix.net#250.132)", + "displayTitle": "250.132 Short Sections of Raceway or Cable Armor", + "children": [], + "url": "https://2023.antflix.net#250.132" + }, + { + "body": "Unless connected to the grounded circuit conductor as permitted by 250.32, 250.140, and 250.142, non-current-carrying metal parts of equipment, raceways, and other enclosures, if grounded, shall be connected to an equipment grounding conductor by one of the following methods: By connecting to any of the equipment grounding conductors permitted by 250.118(2) through (14)By connecting to an equipment grounding conductor of the wire type that is contained within the same raceway, contained within the same cable, or otherwise run with the circuit conductorsException No. 1: As provided in 250.130(C), the equipment grounding conductor shall be permitted to be run separately from the circuit conductors.Exception No. 2: For dc circuits, the equipment grounding conductor shall be permitted to be run separately from the circuit conductorsInformational Note No. 1: See 250.102 and 250.168 for equipment bonding jumper requirements.Informational Note No. 2: See 400.10 for use of flexible cords and flexible cables for fixed equipment. [250.134](https://2023.antflix.net#250.134)", + "displayTitle": "250.134 Equipment Fastened in Place or Connected by Permanent Wiring Methods (Fixed)", + "children": [], + "url": "https://2023.antflix.net#250.134" + }, + { + "body": "If a metal rack or structure is connected to an equipment grounding conductor in accordance with 250.134, it shall be permitted to serve as the equipment grounding conductor for electrical equipment secured to and in electrical contact with the metal rack or structure. [250.136](https://2023.antflix.net#250.136)", + "displayTitle": "250.136 Equipment Secured to a Metal Rack or Structure", + "children": [], + "url": "https://2023.antflix.net#250.136" + }, + { + "body": "Non-current-carrying metal parts of cord-and-plug-connected equipment, if required to be connected to an equipment grounding conductor, shall be connected by one of the methods in 250.138(A) or (B). [250.138](https://2023.antflix.net#250.138)", + "displayTitle": "250.138 Cord-and-Plug-Connected Equipment", + "children": [ + { + "body": "By means of an equipment grounding conductor run with the power supply conductors in a cable assembly or flexible cord properly terminated in a grounding-type attachment plug with one fixed grounding contact. Exception: The grounding contacting pole of grounding-type plug-in ground-fault circuit interrupters shall be permitted to be of the movable, self-restoring type, on circuits operating at not over 150 volts between any two conductors or over 150 volts between any conductor and ground. [250.138_(A)](https://2023.antflix.net#250.138_(A))", + "displayTitle": "(A) By Means of an Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#250.138_(A)" + }, + { + "body": "By means of a separate flexible wire or strap, insulated or bare, connected to an equipment grounding conductor, and protected as well as practicable against physical damage, if part of equipment. [250.138_(B)](https://2023.antflix.net#250.138_(B))", + "displayTitle": "(B) By Means of a Separate Flexible Wire or Strap", + "children": [], + "url": "https://2023.antflix.net#250.138_(B)" + } + ], + "url": "https://2023.antflix.net#250.138" + }, + { + "body": "Frames of electric ranges, wall-mounted ovens, counter-mounted cooking units, clothes dryers, and outlet or junction boxes that are part of the circuit shall be connected to the equipment grounding conductor in accordance with 250.140(A) or the grounded conductor in accordance with 250.140(B). [250.140](https://2023.antflix.net#250.140)", + "displayTitle": "250.140 Frames of Ranges and Clothes Dryers", + "children": [ + { + "body": "The circuit supplying the appliance shall include an equipment grounding conductor. The frame of the appliance shall be connected to the equipment grounding conductor in the manner specified by 250.134 or 250.138. [250.140_(A)](https://2023.antflix.net#250.140_(A))", + "displayTitle": "(A) Equipment Grounding Conductor Connections", + "children": [], + "url": "https://2023.antflix.net#250.140_(A)" + }, + { + "body": "For existing branch-circuit installations only, if an equipment grounding conductor is not present in the outlet or junction box the frame of the appliance shall be permitted to be connected to the grounded conductor if all the conditions in the following list items (1), (2), and (3) are met and the grounded conductor complies with either list item (4) or (5): The supply circuit is 120/240-volt, single-phase, 3-wire; or 208Y/120-volt derived from a 3-phase, 4-wire, wye connected system.The grounded conductor is not smaller than 10 AWG copper or 8 AWG aluminum or copper-clad aluminum.Grounding contacts of receptacles furnished as part of the equipment are bonded to the equipment.The grounded conductor is insulated, or the grounded conductor is uninsulated and part of a Type SE service-entrance cable and the branch circuit originates at the service equipment.The grounded conductor is part of a Type SE service-entrance cable that originates in equipment other than a service. The grounded conductor shall be insulated or field covered within the supply enclosure with listed insulating material, such as tape or sleeving to prevent contact of the uninsulated conductor with any normally noncurrent-carrying metal parts. [250.140_(B)](https://2023.antflix.net#250.140_(B))", + "displayTitle": "(B) Grounded Conductor Connections", + "children": [], + "url": "https://2023.antflix.net#250.140_(B)" + } + ], + "url": "https://2023.antflix.net#250.140" + }, + { + "displayTitle": "250.142 Use of Grounded Circuit Conductor for Grounding Equipment", + "children": [ + { + "body": "A grounded circuit conductor shall be permitted to be connected to non-current-carrying metal parts of equipment, raceways, and other enclosures at any of the following locations: On the supply side or within the enclosure of the ac service disconnecting meansOn the supply side or within the enclosure of the main disconnecting means for separate buildings as provided in 250.32(B)(1) Exception No. 1On the supply side or within the enclosure of the main disconnecting means or overcurrent devices of a separately derived system where permitted by 250.30(A)(1) [250.142_(A)](https://2023.antflix.net#250.142_(A))", + "displayTitle": "(A) Supply-Side Equipment", + "children": [], + "url": "https://2023.antflix.net#250.142_(A)" + }, + { + "body": "Except as permitted in 250.30(A)(1), 250.32(B)(1), Exception No. 1, and Part X of Article 250, a grounded circuit conductor shall not be connected to noncurrent-carrying metal parts of equipment on the load side of the service disconnecting means or on the load side of a separately derived system disconnecting means or the overcurrent devices for a separately derived system not having a main disconnecting means. Exception No. 1: The frames of ranges, wall-mounted ovens, counter-mounted cooking units, and clothes dryers under the conditions permitted for existing installations by 250.140 shall be permitted to be connected to the grounded circuit conductor. Exception No. 2: It shall be permissible to connect meter enclosures to the grounded circuit conductor on the load side of the service disconnect if all of the following conditions apply: (1) Ground-fault protection of equipment is not installed. (2) All meter enclosures are located immediately adjacent to the service disconnecting means. (3) The size of the grounded circuit conductor is not smaller than the size specified in Table 250.122 for equipment grounding conductors. Exception No. 3: Electrode-type boilers operating at over 1000 volts shall be grounded as required in 495.72(E)(1) and 495.74. [250.142_(B)](https://2023.antflix.net#250.142_(B))", + "displayTitle": "(B) Load-Side Equipment", + "children": [], + "url": "https://2023.antflix.net#250.142_(B)" + } + ], + "url": "https://2023.antflix.net#250.142" + }, + { + "body": "If equipment is required to be grounded and is supplied by more than one circuit containing an equipment grounding conductor, a means to terminate each equipment grounding conductor meeting the requirements of 250.8 shall be provided as specified in 250.134 and 250.138. [250.144](https://2023.antflix.net#250.144)", + "displayTitle": "250.144 Multiple Circuit Connections", + "children": [], + "url": "https://2023.antflix.net#250.144" + }, + { + "body": "An equipment bonding jumper shall be used to connect the grounding terminal of a grounding-type receptacle to a metal box that is connected to an equipment grounding conductor, except as permitted in 250.146(A) through (D). The equipment bonding jumper shall be sized in accordance with Table 250.122. [250.146](https://2023.antflix.net#250.146)", + "displayTitle": "250.146 Connecting Receptacle Grounding Terminal to an Equipment Grounding Conductor", + "children": [ + { + "body": "If a metal box is mounted on the surface, the direct metal-to-metal contact between the device yoke or strap to the box shall be permitted to provide the required effective ground-fault current path. At least one of the insulating washers shall be removed from receptacles that do not have a contact yoke or device to ensure direct metal-to-metal contact. Direct metal-to-metal contact for providing continuity applies to cover-mounted receptacles if the box and cover combination are listed as providing continuity between the box and the receptacle. A listed exposed work cover shall be permitted to be the grounding and bonding means under both of the following conditions: The device is attached to the cover with at least two fasteners that are permanent (such as a rivet) or have a thread-locking or screw- or nut-locking means.The cover mounting holes are located on a flat nonraised portion of the cover. [250.146_(A)](https://2023.antflix.net#250.146_(A))", + "displayTitle": "(A) Surface-Mounted Box", + "children": [], + "url": "https://2023.antflix.net#250.146_(A)" + }, + { + "body": "Contact devices or yokes designed and listed as self-grounding shall be permitted in conjunction with the supporting screws to establish equipment bonding between the device yoke and flush-type boxes. [250.146_(B)](https://2023.antflix.net#250.146_(B))", + "displayTitle": "(B) Contact Devices or Yokes", + "children": [], + "url": "https://2023.antflix.net#250.146_(B)" + }, + { + "body": "Floor boxes designed for and listed as providing continuity between the box and the device shall be permitted. [250.146_(C)](https://2023.antflix.net#250.146_(C))", + "displayTitle": "(C) Floor Boxes", + "children": [], + "url": "https://2023.antflix.net#250.146_(C)" + }, + { + "body": "If installed for the reduction of electromagnetic interference on the equipment grounding conductor, a receptacle in which the grounding terminal is purposely insulated from the receptacle mounting means shall be permitted. The receptacle grounding terminal shall be connected to an insulated equipment grounding conductor run with the circuit conductors. This equipment grounding conductor shall be permitted to pass through one or more panelboards without a connection to the panelboard grounding terminal bar as permitted in 408.40, Exception, so as to terminate within the same building or structure directly at an equipment grounding conductor terminal of the applicable derived system or service. If installed in accordance with this section, this equipment grounding conductor shall also be permitted to pass through boxes, wireways, or other enclosures without being connected to such enclosures. Informational Note: Use of an isolated equipment grounding conductor does not relieve the requirement for connecting the raceway system and outlet box to an equipment grounding conductor. [250.146_(D)](https://2023.antflix.net#250.146_(D))", + "displayTitle": "(D) Isolated Ground Receptacles", + "children": [], + "url": "https://2023.antflix.net#250.146_(D)" + } + ], + "url": "https://2023.antflix.net#250.146" + }, + { + "body": "If circuit conductors are spliced within a box or terminated on equipment within or supported by a box, the installation shall comply with 250.148(A) through (D). Exception: The equipment grounding conductor permitted in 250.146(D) shall not be required to be connected to the other equipment grounding conductors or to the box. [250.148](https://2023.antflix.net#250.148)", + "displayTitle": "250.148 Continuity of Equipment Grounding Conductors and Attachment in Boxes", + "children": [ + { + "body": "All equipment grounding conductors that are spliced or terminated within the box shall be connected together. Connections and splices shall be made in accordance with 110.14(B) and 250.8 except that insulation shall not be required. [250.148_(A)](https://2023.antflix.net#250.148_(A))", + "displayTitle": "(A) Connections and Splices", + "children": [], + "url": "https://2023.antflix.net#250.148_(A)" + }, + { + "body": "The arrangement of grounding connections shall be such that the disconnection or the removal of a luminaire, receptacle, or other device fed from the box does not interrupt the electrical continuity of the equipment grounding conductor(s) providing an effective ground-fault current path. [250.148_(B)](https://2023.antflix.net#250.148_(B))", + "displayTitle": "(B) Equipment Grounding Conductor Continuity", + "children": [], + "url": "https://2023.antflix.net#250.148_(B)" + }, + { + "body": "A connection used for no other purpose shall be made between the metal box and the equipment grounding conductor(s). The equipment bonding jumper or equipment grounding conductor shall be sized from Table 250.122 based on the largest overcurrent device protecting circuit conductors in the box. [250.148_(C)](https://2023.antflix.net#250.148_(C))", + "displayTitle": "(C) Metal Boxes", + "children": [], + "url": "https://2023.antflix.net#250.148_(C)" + }, + { + "body": "One or more equipment grounding conductors brought into a nonmetallic outlet box shall be arranged to provide a connection to any fitting or device in that box requiring connection to an equipment grounding conductor. [250.148_(D)](https://2023.antflix.net#250.148_(D))", + "displayTitle": "(D) Nonmetallic Boxes", + "children": [], + "url": "https://2023.antflix.net#250.148_(D)" + } + ], + "url": "https://2023.antflix.net#250.148" + }, + { + "displayTitle": "Part VIII Direct-Current Systems", + "children": [], + "url": "https://2023.antflix.net#divider_0_VIII" + }, + { + "body": "Direct-current systems shall comply with Part VIII and other sections of Article 250 not specifically intended for ac systems. [250.160](https://2023.antflix.net#250.160)", + "displayTitle": "250.160 General", + "children": [], + "url": "https://2023.antflix.net#250.160" + }, + { + "body": "Direct-current circuits and systems shall be grounded as provided for in 250.162(A) and (B). [250.162](https://2023.antflix.net#250.162)", + "displayTitle": "250.162 Direct-Current Circuits and Systems to Be Grounded", + "children": [ + { + "body": "A 2-wire, dc system supplying premises wiring and operating at greater than 60 volts but not greater than 300 volts shall be grounded. Exception No. 1: A system equipped with a ground detector and supplying only industrial equipment in limited areas shall not be required to be grounded if installed immediately adjacent to, or integral with, the source of supply. Exception No. 2: A rectifier-derived dc system supplied from an ac system complying with 250.20 shall not be required to be grounded. Exception No. 3: Direct-current fire alarm circuits having a maximum current of 0.030 ampere as specified in Article 760, Part III, shall not be required to be grounded. [250.162_(A)](https://2023.antflix.net#250.162_(A))", + "displayTitle": "(A) Two-Wire, Direct-Current Systems", + "children": [], + "url": "https://2023.antflix.net#250.162_(A)" + }, + { + "body": "The neutral conductor of all 3-wire, dc systems supplying premises wiring shall be grounded. [250.162_(B)](https://2023.antflix.net#250.162_(B))", + "displayTitle": "(B) Three-Wire, Direct-Current Systems", + "children": [], + "url": "https://2023.antflix.net#250.162_(B)" + } + ], + "url": "https://2023.antflix.net#250.162" + }, + { + "displayTitle": "250.164 Point of Connection for Direct-Current Systems", + "children": [ + { + "body": "Direct-current systems to be grounded and supplied from an off-premises source shall have the grounding connection made at one or more supply stations. A grounding connection shall not be made at individual services or at any point on the premises wiring. [250.164_(A)](https://2023.antflix.net#250.164_(A))", + "displayTitle": "(A) Off-Premises Source", + "children": [], + "url": "https://2023.antflix.net#250.164_(A)" + }, + { + "body": "If the dc system source is located on the premises, a grounding connection shall be made at one of the following: The sourceThe first system disconnection means or overcurrent deviceBy other means that accomplish system protection and that use equipment listed and identified for the use [250.164_(B)](https://2023.antflix.net#250.164_(B))", + "displayTitle": "(B) On-Premises Source", + "children": [], + "url": "https://2023.antflix.net#250.164_(B)" + } + ], + "url": "https://2023.antflix.net#250.164" + }, + { + "body": "The size of the grounding electrode conductor for a dc system shall be as specified in 250.166(A) and (B), except as permitted by 250.166(C) through (E). The grounding electrode conductor for a dc system shall meet the sizing requirements in this section but shall not be required to be larger than 3/0 copper or 250 kcmil aluminum or copper-clad aluminum. [250.166](https://2023.antflix.net#250.166)", + "displayTitle": "250.166 Size of the Direct-Current Grounding Electrode Conductor", + "children": [ + { + "body": "If the dc system consists of a 3-wire balancer set or a balancer winding with overcurrent protection as provided in 445.12(D), the grounding electrode conductor shall not be smaller than the neutral conductor and not smaller than 8 AWG copper or 6 AWG aluminum or copper-clad aluminum. [250.166_(A)](https://2023.antflix.net#250.166_(A))", + "displayTitle": "(A) Not Smaller Than the Neutral Conductor", + "children": [], + "url": "https://2023.antflix.net#250.166_(A)" + }, + { + "body": "If the dc system is other than as in 250.166(A), the grounding electrode conductor shall not be smaller than the largest conductor supplied by the system and not smaller than 8 AWG copper or 6 AWG aluminum or copper-clad aluminum. [250.166_(B)](https://2023.antflix.net#250.166_(B))", + "displayTitle": "(B) Not Smaller Than the Largest Conductor", + "children": [], + "url": "https://2023.antflix.net#250.166_(B)" + }, + { + "body": "If connected to rod, pipe, or plate electrodes as in 250.52(A)(5) or (A)(7), that portion of the grounding electrode conductor that is the sole connection to the grounding electrode shall not be required to be larger than 6 AWG copper wire or 4 AWG aluminum or copper-clad aluminum wire. [250.166_(C)](https://2023.antflix.net#250.166_(C))", + "displayTitle": "(C) Connected to Rod, Pipe, or Plate Electrodes", + "children": [], + "url": "https://2023.antflix.net#250.166_(C)" + }, + { + "body": "If connected to a concrete-encased electrode as in 250.52(A)(3), that portion of the grounding electrode conductor that is the sole connection to the grounding electrode shall not be required to be larger than 4 AWG copper wire. [250.166_(D)](https://2023.antflix.net#250.166_(D))", + "displayTitle": "(D) Connected to a Concrete-Encased Electrode", + "children": [], + "url": "https://2023.antflix.net#250.166_(D)" + }, + { + "body": "If connected to a ground ring as in 250.52(A)(4), that portion of the grounding electrode conductor that is the sole connection to the grounding electrode shall not be required to be larger than the conductor used for the ground ring. [250.166_(E)](https://2023.antflix.net#250.166_(E))", + "displayTitle": "(E) Connected to a Ground Ring", + "children": [], + "url": "https://2023.antflix.net#250.166_(E)" + } + ], + "url": "https://2023.antflix.net#250.166" + }, + { + "displayTitle": "250.167 Direct-Current Ground-Fault Detection", + "children": [ + { + "body": "Ground-fault detection systems shall be required for ungrounded systems. [250.167_(A)](https://2023.antflix.net#250.167_(A))", + "displayTitle": "(A) Ungrounded Systems", + "children": [], + "url": "https://2023.antflix.net#250.167_(A)" + }, + { + "body": "Ground-fault detection shall be permitted for grounded systems. [250.167_(B)](https://2023.antflix.net#250.167_(B))", + "displayTitle": "(B) Grounded Systems", + "children": [], + "url": "https://2023.antflix.net#250.167_(B)" + }, + { + "body": "Direct-current systems shall be legibly marked to indicate the grounding type at the dc source or the first disconnecting means of the system. The marking shall be of sufficient durability to withstand the environment involved. Informational Note: See NFPA 70E-2018, Standard for Electrical Safety in the Workplace, which identifies four dc grounding types in detail. [250.167_(C)](https://2023.antflix.net#250.167_(C))", + "displayTitle": "(C) Marking", + "children": [], + "url": "https://2023.antflix.net#250.167_(C)" + } + ], + "url": "https://2023.antflix.net#250.167" + }, + { + "body": "For direct-current systems that are to be grounded, an unspliced bonding jumper shall be used to connect the equipment grounding conductor(s) to the grounded conductor at the source or to the first system disconnecting means where the system is grounded. The size of the bonding jumper shall not be smaller than the system grounding electrode conductor specified in 250.166 and shall comply with 250.28(A), (B), and (C). [250.168](https://2023.antflix.net#250.168)", + "displayTitle": "250.168 Direct-Current System Bonding Jumper", + "children": [], + "url": "https://2023.antflix.net#250.168" + }, + { + "body": "Except as otherwise permitted in 250.34 for portable and vehicle-mounted generators, an ungrounded dc separately derived system supplied from a stand-alone power source (such as an engine-generator set) shall have a grounding electrode conductor connected to an electrode that complies with Part III of this article to provide for grounding of metal enclosures, raceways, cables, and exposed non-current-carrying metal parts of equipment. The grounding electrode conductor connection shall be to the metal enclosure at any point on the separately derived system from the source to the first system disconnecting means or overcurrent device, or it shall be made at the source of a separately derived system that has no disconnecting means or overcurrent devices. The size of the grounding electrode conductor shall be in accordance with 250.166. [250.169](https://2023.antflix.net#250.169)", + "displayTitle": "250.169 Ungrounded Direct-Current Separately Derived Systems", + "children": [], + "url": "https://2023.antflix.net#250.169" + }, + { + "displayTitle": "Part IX Instruments, Meters, and Relays", + "children": [], + "url": "https://2023.antflix.net#divider_2_IX" + }, + { + "body": "Secondary circuits of current and potential instrument transformers shall be grounded if the primary windings are connected to circuits of 300 volts or more to ground and, if installed on or in switchgear and on switchboards, shall be grounded irrespective of voltage. Exception No. 1: Circuits where the primary windings are connected to circuits of 1000 volts or less with no live parts or wiring exposed or accessible to other than qualified persons. Exception No. 2: Current transformer secondaries connected in a three-phase delta configuration shall not be required to be grounded. [250.170](https://2023.antflix.net#250.170)", + "displayTitle": "250.170 Instrument Transformer Circuits", + "children": [], + "url": "https://2023.antflix.net#250.170" + }, + { + "body": "Cases or frames of instrument transformers shall be connected to the equipment grounding conductor if accessible to other than qualified persons. Exception: Cases or frames of current transformers, the primaries of which are not over 150 volts to ground and that are used exclusively to supply current to meters. [250.172](https://2023.antflix.net#250.172)", + "displayTitle": "250.172 Instrument Transformer Cases", + "children": [], + "url": "https://2023.antflix.net#250.172" + }, + { + "body": "Instruments, meters, and relays operating with windings or working parts at 1000 volts or less shall be connected to the equipment grounding conductor as specified in 250.174(A), (B), or (C). [250.174](https://2023.antflix.net#250.174)", + "displayTitle": "250.174 Cases of Instruments, Meters, and Relays Operating at 1000 Volts or Less", + "children": [ + { + "body": "Instruments, meters, and relays not located on switchgear or switchboards operating with windings or working parts at 300 volts or more to ground, and accessible to other than qualified persons, shall have the cases and other exposed metal parts connected to the equipment grounding conductor. [250.174_(A)](https://2023.antflix.net#250.174_(A))", + "displayTitle": "(A) Not on Switchgear or Switchboards", + "children": [], + "url": "https://2023.antflix.net#250.174_(A)" + }, + { + "body": "Instruments, meters, and relays (whether operated from current and potential transformers or connected directly in the circuit) on switchgear or switchboards having no live parts on the front of the panels shall have the cases connected to the equipment grounding conductor. [250.174_(B)](https://2023.antflix.net#250.174_(B))", + "displayTitle": "(B) On Switchgear or Dead-Front Switchboards", + "children": [], + "url": "https://2023.antflix.net#250.174_(B)" + }, + { + "body": "Instruments, meters, and relays (whether operated from current and potential transformers or connected directly in the circuit) on switchboards having exposed live parts on the front of panels shall not have their cases connected to the equipment grounding conductor. Mats of insulating rubber or other approved means of floor insulation shall be provided for the operator where the voltage to ground exceeds 150 volts. [250.174_(C)](https://2023.antflix.net#250.174_(C))", + "displayTitle": "(C) On Live-Front Switchboards", + "children": [], + "url": "https://2023.antflix.net#250.174_(C)" + } + ], + "url": "https://2023.antflix.net#250.174" + }, + { + "body": "If instruments, meters, and relays have current-carrying parts of over 1000 volts to ground, they shall be isolated by elevation or protected by a barrier(s), grounded metal, or insulating covers or guards. Their cases shall not be connected to the equipment grounding conductor. Exception: Cases of electrostatic ground detectors shall be permitted to be connected to an equipment grounding conductor if the internal ground segments of the instrument are connected to the instrument case and grounded and the ground detector is isolated by elevation. [250.176](https://2023.antflix.net#250.176)", + "displayTitle": "250.176 Cases of Instruments, Meters, and Relays - Operating at Over 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#250.176" + }, + { + "body": "The equipment grounding conductor for secondary circuits of instrument transformers and for instrument cases shall not be smaller than 12 AWG copper or 10 AWG aluminum or copper-clad aluminum. Cases of instrument transformers, instruments, meters, and relays that are mounted directly on grounded metal surfaces of enclosures or grounded metal of switchgear or switchboard panels shall not be required to be connected to an additional equipment grounding conductor. [250.178](https://2023.antflix.net#250.178)", + "displayTitle": "250.178 Instrument Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#250.178" + }, + { + "displayTitle": "Part X Grounding of Systems and Circuits of Over 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#divider_2_X" + }, + { + "body": "If systems over 1000 volts are grounded, they shall comply with all applicable requirements of 250.1 through 250.178 and with 250.182 through 250.194, which supplement and modify the preceding sections. [250.180](https://2023.antflix.net#250.180)", + "displayTitle": "250.180 General", + "children": [], + "url": "https://2023.antflix.net#250.180" + }, + { + "body": "A system neutral point derived from a grounding transformer shall be permitted to be used for grounding systems over 1 kV. [250.182](https://2023.antflix.net#250.182)", + "displayTitle": "250.182 Derived Neutral Systems", + "children": [], + "url": "https://2023.antflix.net#250.182" + }, + { + "body": "Solidly grounded neutral systems shall be permitted to be either single point grounded or multigrounded neutral. [250.184](https://2023.antflix.net#250.184)", + "displayTitle": "250.184 Solidly Grounded Neutral Systems", + "children": [ + { + "displayTitle": "(A) Neutral Conductor", + "children": [ + { + "body": "The minimum insulation level for neutral conductors of solidly grounded systems shall be 600 volts. Exception No. 1: For multigrounded neutral systems as permitted in 250.184(C), bare copper conductors shall be permitted to be used for the neutral conductor of the following: (1) Service-entrance conductors (2) Service laterals or underground service conductors (3) Direct-buried portions of feeders Exception No. 2: Bare conductors shall be permitted for the neutral conductor of overhead portions installed outdoors. Exception No. 3: The grounded neutral conductor shall be permitted to be a bare conductor if isolated from phase conductors and protected from physical damage. Informational Note: See 225.4 for conductor covering where within 3.0 m (10 ft) of any building or other structure. [250.184_(A)_(1)](https://2023.antflix.net#250.184_(A)_(1))", + "displayTitle": "(1) Insulation Level", + "children": [], + "url": "https://2023.antflix.net#250.184_(A)_(1)" + }, + { + "body": "The neutral conductor shall have an ampacity that is not less than the load imposed and be not less than 331/3 percent of the ampacity of the phase conductors. Exception: In industrial and commercial premises under engineering supervision, it shall be permissible to size the ampacity of the neutral conductor to not less than 20 percent of the ampacity of the phase conductor. [250.184_(A)_(2)](https://2023.antflix.net#250.184_(A)_(2))", + "displayTitle": "(2) Ampacity", + "children": [], + "url": "https://2023.antflix.net#250.184_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#250.184_(A)" + }, + { + "body": "If a single-point grounded neutral system is used, the following shall apply: A single-point grounded neutral system shall be permitted to be supplied from one of the following:A separately derived systemA multigrounded neutral system with an equipment grounding conductor connected to the multigrounded neutral conductor at the source of the single-point grounded neutral systemA grounding electrode shall be provided for the system.A grounding electrode conductor shall connect the grounding electrode to the system neutral conductor.A bonding jumper shall connect the equipment grounding conductor to the grounding electrode conductor.An equipment grounding conductor shall be provided to each building, structure, and equipment enclosure.A neutral conductor shall only be required if phase-to-neutral loads are supplied.The neutral conductor, if provided, shall be insulated and isolated from earth except at one location.An equipment grounding conductor shall be run with the phase conductors and shall comply with all of the following:Shall not carry continuous loadShall be bare, covered, or insulatedShall have ampacity for fault current duty [250.184_(B)](https://2023.antflix.net#250.184_(B))", + "displayTitle": "(B) Single-Point Grounded Neutral System", + "children": [], + "url": "https://2023.antflix.net#250.184_(B)" + }, + { + "body": "If a multigrounded neutral system is used, the following shall apply: The neutral conductor of a solidly grounded neutral system shall be permitted to be grounded at more than one point. Grounding shall be permitted at one or more of the following locations:Transformers supplying conductors to a building or other structureUnderground circuits if the neutral conductor is exposedOverhead circuits installed outdoorsThe multigrounded neutral conductor shall be grounded at each transformer and at other additional locations by connection to a grounding electrode.At least one grounding electrode shall be installed and connected to the multigrounded neutral conductor every 400 m (1300 ft).The maximum distance between any two adjacent electrodes shall not be more than 400 m (1300 ft).In a multigrounded shielded cable system, the shielding shall be grounded at each cable joint that is exposed to personnel contact.Exception: In a multipoint grounded system, a grounding electrode shall not be required to bond the neutral conductor in an uninterrupted conductor exceeding 400 m (1300 ft) if the only purpose for removing the cable jacket is for bonding the neutral conductor to a grounding electrode. [250.184_(C)](https://2023.antflix.net#250.184_(C))", + "displayTitle": "(C) Multigrounded Neutral Systems", + "children": [], + "url": "https://2023.antflix.net#250.184_(C)" + } + ], + "url": "https://2023.antflix.net#250.184" + }, + { + "displayTitle": "250.186 Grounding Service-Supplied Alternating-Current Systems", + "children": [ + { + "body": "If an ac system is grounded at any point and is provided with a grounded conductor at the service point, a grounded conductor(s) shall be installed and routed with the ungrounded conductors to each service disconnecting means and shall be connected to each disconnecting means grounded conductor(s) terminal or bus. A main bonding jumper shall connect the grounded conductor(s) to each service disconnecting means enclosure. The grounded conductor(s) shall be installed in accordance with 250.186(A)(1) through (A)(4). The size of the solidly grounded circuit conductor(s) shall be the larger of that determined by 250.184 or 250.186(A)(1) or (A)(2). Exception: If two or more service disconnecting means are located in a single assembly listed for use as service equipment, it shall be permitted to connect the grounded, conductor(s) to the assembly common grounded conductor(s) terminal or bus. The assembly shall include a main bonding jumper for connecting the grounded conductor(s) to the assembly enclosure. [250.186_(A)](https://2023.antflix.net#250.186_(A))", + "displayTitle": "(A) Systems With a Grounded Conductor at the Service Point", + "children": [ + { + "body": "The grounded conductor shall not be smaller than the required grounding electrode conductor specified in Table 250.102(C)(1) but shall not be required to be larger than the largest ungrounded service-entrance conductor(s). [250.186_(A)_(1)](https://2023.antflix.net#250.186_(A)_(1))", + "displayTitle": "(1) Sizing for a Single Raceway or Overhead Conductor", + "children": [], + "url": "https://2023.antflix.net#250.186_(A)_(1)" + }, + { + "body": "If the ungrounded service-entrance conductors are installed in parallel in two or more raceways or as overhead parallel conductors, the grounded conductors shall also be installed in parallel. The size of the grounded conductor in each raceway or overhead shall be based on the total circular mil area of the parallel ungrounded conductors in the raceway or overhead, as indicated in 250.186(A)(1), but not smaller than 1/0 AWG. Informational Note: See 310.10(G) for grounded conductors connected in parallel. [250.186_(A)_(2)](https://2023.antflix.net#250.186_(A)_(2))", + "displayTitle": "(2) Parallel Conductors in Two or More Raceways or Overhead Conductors", + "children": [], + "url": "https://2023.antflix.net#250.186_(A)_(2)" + }, + { + "body": "The grounded conductor of a 3-phase, 3-wire delta service shall have an ampacity not less than that of the ungrounded conductors. [250.186_(A)_(3)](https://2023.antflix.net#250.186_(A)_(3))", + "displayTitle": "(3) Delta-Connected Service", + "children": [], + "url": "https://2023.antflix.net#250.186_(A)_(3)" + }, + { + "body": "Impedance grounded systems shall be installed in accordance with 250.187. [250.186_(A)_(4)](https://2023.antflix.net#250.186_(A)_(4))", + "displayTitle": "(4) Impedance Grounded Systems", + "children": [], + "url": "https://2023.antflix.net#250.186_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#250.186_(A)" + }, + { + "body": "If an ac system is grounded at any point and is not provided with a grounded conductor at the service point, a supply-side bonding jumper shall be installed and routed with the ungrounded conductors to each service disconnecting means and shall be connected to each disconnecting means equipment grounding conductor terminal or bus. The supply-side bonding jumper shall be installed in accordance with 250.186(B)(1) through (B)(3). Exception: If two or more service disconnecting means are located in a single assembly listed for use as service equipment, it shall be permitted to connect the supply-side bonding jumper to the assembly common equipment grounding terminal or bus. [250.186_(B)](https://2023.antflix.net#250.186_(B))", + "displayTitle": "(B) Systems Without a Grounded Conductor at the Service Point", + "children": [ + { + "body": "The supply-side bonding jumper shall not be smaller than the required grounding electrode conductor specified in Table 250.102(C)(1) but shall not be required to be larger than the largest ungrounded service-entrance conductor(s). [250.186_(B)_(1)](https://2023.antflix.net#250.186_(B)_(1))", + "displayTitle": "(1) Sizing for a Single Raceway or Overhead Conductor", + "children": [], + "url": "https://2023.antflix.net#250.186_(B)_(1)" + }, + { + "body": "If the ungrounded service-entrance conductors are installed in parallel in two or more raceways or overhead conductors, the supply-side bonding jumper shall also be installed in parallel. The size of the supply-side bonding jumper in each raceway or overhead shall be based on the total circular mil area of the parallel ungrounded conductors in the raceway or overhead, as indicated in 250.186(A)(1), but not smaller than 1/0 AWG. [250.186_(B)_(2)](https://2023.antflix.net#250.186_(B)_(2))", + "displayTitle": "(2) Parallel Conductors in Two or More Raceways or Overhead Conductors", + "children": [], + "url": "https://2023.antflix.net#250.186_(B)_(2)" + }, + { + "body": "Impedance grounded systems shall be installed in accordance with 250.187. [250.186_(B)_(3)](https://2023.antflix.net#250.186_(B)_(3))", + "displayTitle": "(3) Impedance Grounded Systems", + "children": [], + "url": "https://2023.antflix.net#250.186_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#250.186_(B)" + } + ], + "url": "https://2023.antflix.net#250.186" + }, + { + "body": "Impedance grounded systems in which a grounding impedance device, typically a resistor, limits the ground-fault current shall be permitted if all of the following conditions are met: The conditions of maintenance and supervision ensure that only qualified persons service the installation.Ground detectors are installed on the system.Line-to-neutral loads are not served.Impedance grounded systems shall comply with 250.187(A) through (D). [250.187](https://2023.antflix.net#250.187)", + "displayTitle": "250.187 Impedance Grounded Systems", + "children": [ + { + "body": "The grounding impedance device shall be installed between the grounding electrode conductor and the impedance grounding conductor connected to the system neutral point. [250.187_(A)](https://2023.antflix.net#250.187_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#250.187_(A)" + }, + { + "body": "The impedance grounding conductor shall be insulated for the maximum neutral voltage. Exception: A bare impedance grounding conductor shall be permitted if the bare portion of the grounding impedance device and conductor are not in a readily accessible location and securely separated from the ungrounded conductors. Informational Note: The maximum neutral voltage in a 3-phase wye system is 57.7 percent of the phase-to-phase voltage. [250.187_(B)](https://2023.antflix.net#250.187_(B))", + "displayTitle": "(B) Insulated", + "children": [], + "url": "https://2023.antflix.net#250.187_(B)" + }, + { + "body": "The system neutral point shall not be connected to ground, except through the grounding impedance device. [250.187_(C)](https://2023.antflix.net#250.187_(C))", + "displayTitle": "(C) System Neutral Point Connection", + "children": [], + "url": "https://2023.antflix.net#250.187_(C)" + }, + { + "body": "Equipment grounding conductors shall be permitted to be bare and shall be electrically connected to the ground bus and grounding electrode conductor. [250.187_(D)](https://2023.antflix.net#250.187_(D))", + "displayTitle": "(D) Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#250.187_(D)" + } + ], + "url": "https://2023.antflix.net#250.187" + }, + { + "body": "Systems supplying portable or mobile equipment over 1000 volts, other than substations installed on a temporary basis, shall comply with 250.188(A) through (F). [250.188](https://2023.antflix.net#250.188)", + "displayTitle": "250.188 Grounding of Systems Supplying Portable or Mobile Equipment", + "children": [ + { + "body": "Portable or mobile equipment over 1000 volts shall be supplied from a system having its neutral conductor grounded through an impedance. If a delta-connected system over 1000 volts is used to supply portable or mobile equipment, a system neutral point and associated neutral conductor shall be derived. [250.188_(A)](https://2023.antflix.net#250.188_(A))", + "displayTitle": "(A) Portable or Mobile Equipment", + "children": [], + "url": "https://2023.antflix.net#250.188_(A)" + }, + { + "body": "Exposed noncurrent-carrying metal parts of portable or mobile equipment shall be connected by an equipment grounding conductor to the point at which the system neutral impedance is grounded. [250.188_(B)](https://2023.antflix.net#250.188_(B))", + "displayTitle": "(B) Exposed Non-Current-Carrying Metal Parts", + "children": [], + "url": "https://2023.antflix.net#250.188_(B)" + }, + { + "body": "The voltage developed between the portable or mobile equipment frame and ground by the flow of maximum ground-fault current shall not exceed 100 volts. [250.188_(C)](https://2023.antflix.net#250.188_(C))", + "displayTitle": "(C) Ground-Fault Current", + "children": [], + "url": "https://2023.antflix.net#250.188_(C)" + }, + { + "body": "Ground-fault detection and relaying shall be provided to automatically de-energize any component of a system over 1000 volts that has developed a ground fault. The continuity of the equipment grounding conductor shall be continuously monitored so as to automatically de-energize the circuit of the system over 1000 volts to the portable or mobile equipment upon loss of continuity of the equipment grounding conductor. [250.188_(D)](https://2023.antflix.net#250.188_(D))", + "displayTitle": "(D) Ground-Fault Detection and Relaying", + "children": [], + "url": "https://2023.antflix.net#250.188_(D)" + }, + { + "body": "The grounding electrode to which the portable or mobile equipment system neutral impedance is connected shall be isolated from and separated in the ground by at least 6.0 m (20 ft) from any other system or equipment grounding electrode, and there shall be no direct connection between the grounding electrodes, such as buried pipe and fence, and so forth. [250.188_(E)](https://2023.antflix.net#250.188_(E))", + "displayTitle": "(E) Isolation", + "children": [], + "url": "https://2023.antflix.net#250.188_(E)" + }, + { + "body": "Trailing cable and couplers of systems over 1000 volts for interconnection of portable or mobile equipment shall meet the requirements of Part III of Article 400 for cables and 495.65 for couplers. [250.188_(F)](https://2023.antflix.net#250.188_(F))", + "displayTitle": "(F) Trailing Cable and Couplers", + "children": [], + "url": "https://2023.antflix.net#250.188_(F)" + } + ], + "url": "https://2023.antflix.net#250.188" + }, + { + "displayTitle": "250.190 Grounding of Equipment", + "children": [ + { + "body": "All non-current-carrying metal parts of fixed, portable, and mobile equipment and associated fences, housings, enclosures, and supporting structures shall be grounded. Exception: If isolated from ground and located such that any person in contact with ground cannot contact such metal parts when the equipment is energized, the metal parts shall not be required to be grounded. Informational Note: See 250.110, Exception No. 2, for pole-mounted distribution apparatus. [250.190_(A)](https://2023.antflix.net#250.190_(A))", + "displayTitle": "(A) Equipment Grounding", + "children": [], + "url": "https://2023.antflix.net#250.190_(A)" + }, + { + "body": "If a grounding electrode conductor connects non-current-carrying metal parts to ground, the grounding electrode conductor shall be sized in accordance with Table 250.66, based on the size of the largest ungrounded service, feeder, or branch-circuit conductors supplying the equipment. The grounding electrode conductor shall not be smaller than 6 AWG copper or 4 AWG aluminum or copper-clad aluminum. [250.190_(B)](https://2023.antflix.net#250.190_(B))", + "displayTitle": "(B) Grounding Electrode Conductor", + "children": [], + "url": "https://2023.antflix.net#250.190_(B)" + }, + { + "body": "Equipment grounding conductors shall comply with 250.190(C)(1) through (C)(3). [250.190_(C)](https://2023.antflix.net#250.190_(C))", + "displayTitle": "(C) Equipment Grounding Conductor", + "children": [ + { + "body": "Equipment grounding conductors that are not an integral part of a cable assembly shall not be smaller than 6 AWG copper or 4 AWG aluminum or copper-clad aluminum. [250.190_(C)_(1)](https://2023.antflix.net#250.190_(C)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#250.190_(C)_(1)" + }, + { + "body": "The metallic insulation shield encircling the current-carrying conductors shall be permitted to be used as an equipment grounding conductor, if it is rated for clearing time of ground-fault current protective device operation without damaging the metallic shield. The metallic tape insulation shield and drain wire insulation shield shall not be used as an equipment grounding conductor for solidly grounded systems. [250.190_(C)_(2)](https://2023.antflix.net#250.190_(C)_(2))", + "displayTitle": "(2) Shielded Cables", + "children": [], + "url": "https://2023.antflix.net#250.190_(C)_(2)" + }, + { + "body": "Equipment grounding conductors shall be sized in accordance with Table 250.122 based on the current rating of the fuse or the overcurrent setting of the protective relay. Informational Note: The overcurrent rating for a circuit breaker is the combination of the current transformer ratio and the current pickup setting of the protective relay. [250.190_(C)_(3)](https://2023.antflix.net#250.190_(C)_(3))", + "displayTitle": "(3) Sizing", + "children": [], + "url": "https://2023.antflix.net#250.190_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#250.190_(C)" + } + ], + "url": "https://2023.antflix.net#250.190" + }, + { + "body": "For ac substations, the grounding system shall be in accordance with Part III of this article. Informational Note: See IEEE 80, IEEE Guide for Safety in AC Substation Grounding, for further information on outdoor ac substation grounding. [250.191](https://2023.antflix.net#250.191)", + "displayTitle": "250.191 Grounding System at Alternating-Current Substations", + "children": [], + "url": "https://2023.antflix.net#250.191" + }, + { + "body": "Metal fences enclosing, and other metal structures in or surrounding, a substation with exposed electrical conductors and equipment shall be grounded and bonded to limit step, touch, and transfer voltages. [250.194](https://2023.antflix.net#250.194)", + "displayTitle": "250.194 Grounding and Bonding of Fences and Other Metal Structures", + "children": [ + { + "body": "If metal fences are located within 5 m (16 ft) of the exposed electrical conductors or equipment, the fence shall be bonded to the grounding electrode system with wire-type bonding jumpers as follows: Bonding jumpers shall be installed at each fence corner and at maximum 50 m (160 ft) intervals along the fence.If bare overhead conductors cross the fence, bonding jumpers shall be installed on each side of the crossing.Gates shall be bonded to the gate support post, and each gate support post shall be bonded to the grounding electrode system.Any gate or other opening in the fence shall be bonded across the opening by a buried bonding jumper.The grounding grid or grounding electrode systems shall be extended to cover the swing of all gates.The barbed wire strands above the fence shall be bonded to the grounding electrode system.Alternate designs performed under engineering supervision shall be permitted for grounding or bonding of metal fences.Informational Note No. 1: A nonconducting fence or section may provide isolation for transfer of voltage to other areas.Informational Note No. 2: See IEEE 80, IEEE Guide for Safety In AC Substation Grounding, for design and installation of fence grounding. [250.194_(A)](https://2023.antflix.net#250.194_(A))", + "displayTitle": "(A) Metal Fences", + "children": [], + "url": "https://2023.antflix.net#250.194_(A)" + }, + { + "body": "All exposed conductive metal structures, including guy wires within 2.5 m (8 ft) vertically or 5 m (16 ft) horizontally of exposed conductors or equipment and subject to contact by persons, shall be bonded to the grounding electrode systems in the area. [250.194_(B)](https://2023.antflix.net#250.194_(B))", + "displayTitle": "(B) Metal Structures", + "children": [], + "url": "https://2023.antflix.net#250.194_(B)" + } + ], + "url": "https://2023.antflix.net#250.194" + } + ], + "url": "https://2023.antflix.net#250" + } + ], + "url": "https://2023.antflix.net#2" + } + ], + "Chapter 3 Wiring Methods and Materials": [ + { + "displayTitle": "Chapter 3 Wiring Methods and Materials", + "children": [ + { + "displayTitle": "Article 300 General Requirements for Wiring Methods and Materials", + "children": [ + { + "displayTitle": "300.1 Scope", + "children": [ + { + "body": "This article covers general requirements for wiring methods and materials for all wiring installations unless modified by other articles in Chapter 3. [300.1_(A)](https://2023.antflix.net#300.1_(A))", + "displayTitle": "(A) All Wiring Installations", + "children": [], + "url": "https://2023.antflix.net#300.1_(A)" + }, + { + "body": "The requirements of this article are not intended to apply to the conductors that form an integral part of equipment, such as motors, controllers, motor control centers, or factory-assembled control equipment or listed utilization equipment. [300.1_(B)](https://2023.antflix.net#300.1_(B))", + "displayTitle": "(B) Integral Parts of Equipment", + "children": [], + "url": "https://2023.antflix.net#300.1_(B)" + }, + { + "body": "Metric designators and trade sizes for conduit, tubing, and associated fittings and accessories shall be in accordance with Table 300.1(C). Table 300.1(C) Metric Designators and Trade Sizes Metric Designator Trade Size 12 3/8 16 1/2 21 3/4 27 1 35 l1/4 41 11/2 53 2 63 21/2 78 3 91 31/2 103 4 129 5 155 6 Note: The metric designators and trade sizes are for identification purposes only and are not actual dimensions. [300.1_(C)](https://2023.antflix.net#300.1_(C))", + "displayTitle": "(C) Metric Designators and Trade Sizes", + "children": [], + "url": "https://2023.antflix.net#300.1_(C)" + } + ], + "url": "https://2023.antflix.net#300.1" + }, + { + "displayTitle": "300.2 Limitations", + "children": [ + { + "body": "Wiring methods specified in Chapter 3 shall be used for 1000 volts ac, 1500 volts dc, nominal, or less where not specifically limited elsewhere in Chapter 3. They shall be permitted for over 1000 volts ac, 1500 volts dc, nominal, where specifically permitted elsewhere in this Code. [300.2_(A)](https://2023.antflix.net#300.2_(A))", + "displayTitle": "(A) Voltage", + "children": [], + "url": "https://2023.antflix.net#300.2_(A)" + }, + { + "body": "Temperature limitation of conductors shall be in accordance with 310.14(A)(3). [300.2_(B)](https://2023.antflix.net#300.2_(B))", + "displayTitle": "(B) Temperature", + "children": [], + "url": "https://2023.antflix.net#300.2_(B)" + } + ], + "url": "https://2023.antflix.net#300.2" + }, + { + "displayTitle": "300.3 Conductors", + "children": [ + { + "body": "Single conductors specified in Table 310.4(1) shall only be permitted where installed as part of a recognized wiring method specified in Chapter 3. Exception: Individual conductors shall be permitted where installed as separate overhead conductors in accordance with 225.6. [300.3_(A)](https://2023.antflix.net#300.3_(A))", + "displayTitle": "(A) Single Conductors", + "children": [], + "url": "https://2023.antflix.net#300.3_(A)" + }, + { + "body": "All conductors of the same circuit and, where used, the grounded conductor and all equipment grounding conductors and bonding conductors shall be contained within the same raceway, conduit body, auxiliary gutter, cable tray, cablebus assembly, trench, cable, or cord unless otherwise permitted in accordance with 300.3(B)(1) through (B)(4). [300.3_(B)](https://2023.antflix.net#300.3_(B))", + "displayTitle": "(B) Conductors of the Same Circuit", + "children": [ + { + "body": "Conductors shall be permitted to be run in parallel in accordance with 310.10(G). The requirement to run all circuit conductors within the same raceway, auxiliary gutter, cable tray, trench, cable, or cord shall apply separately to each portion of the paralleled installation, and the equipment grounding conductors shall comply with 250.122. Connections, taps, or extensions made from paralleled conductors shall connect to all conductors of the paralleled set, grounded and ungrounded, as applicable. Parallel runs in cable trays shall comply with 392.20(C). Exception: Conductors installed in nonmetallic raceways run underground shall be permitted to be arranged as isolated phase, neutral, and grounded conductor installations. The raceways shall be installed in close proximity, and the isolated phase, neutral, and grounded conductors shall comply with 300.20(B). [300.3_(B)_(1)](https://2023.antflix.net#300.3_(B)_(1))", + "displayTitle": "(1) Paralleled Installations", + "children": [], + "url": "https://2023.antflix.net#300.3_(B)_(1)" + }, + { + "body": "Equipment grounding conductors shall be permitted to be installed outside a raceway or cable assembly in accordance with 250.130(C) for certain existing installations or in accordance with 250.134, Exception No. 2, for dc circuits. Equipment bonding conductors shall be permitted to be installed on the outside of raceways in accordance with 250.102(E). [300.3_(B)_(2)](https://2023.antflix.net#300.3_(B)_(2))", + "displayTitle": "(2) Grounding and Bonding Conductors", + "children": [], + "url": "https://2023.antflix.net#300.3_(B)_(2)" + }, + { + "body": "Conductors in wiring methods with a nonmetallic or other nonmagnetic sheath, where run in different raceways, auxiliary gutters, cable trays, trenches, cables, or cords, shall comply with 300.20(B). Conductors in single-conductor Type MI cable with a nonmagnetic sheath shall comply with 332.31. Conductors of single-conductor Type MC cable with a nonmagnetic sheath shall comply with 330.31, 330.116, and 300.20(B). [300.3_(B)_(3)](https://2023.antflix.net#300.3_(B)_(3))", + "displayTitle": "(3) Nonferrous Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#300.3_(B)_(3)" + }, + { + "body": "Where an auxiliary gutter runs between a column-width panelboard and a pull box, and the pull box includes neutral terminations, the neutral conductors of circuits supplied from the panelboard shall be permitted to originate in the pull box. [300.3_(B)_(4)](https://2023.antflix.net#300.3_(B)_(4))", + "displayTitle": "(4) Column-Width Panelboard Enclosures", + "children": [], + "url": "https://2023.antflix.net#300.3_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#300.3_(B)" + }, + { + "displayTitle": "(C) Conductors of Different Systems", + "children": [ + { + "body": "Conductors of ac and dc circuits rated 1000 volts ac, 1500 volts dc, nominal, or less shall be permitted to occupy the same equipment wiring enclosure, cable, or raceway. All conductors shall have an insulation rating equal to at least the maximum circuit voltage applied to any conductor within the enclosure, cable, or raceway. Secondary wiring to electric-discharge lamps of 1000 volts ac, 1500 volts dc, or less, if insulated for the secondary voltage involved, shall be permitted to occupy the same luminaire, sign, or outline lighting enclosure as the branch-circuit conductors. Informational Note No. 1: See 725.136(A) for Class 2 and Class 3 circuit conductors. Informational Note No. 2: See 690.31(B) for photovoltaic source and output circuits. [300.3_(C)_(1)](https://2023.antflix.net#300.3_(C)_(1))", + "displayTitle": "(1) 1000 Volts AC, 1500 Volts DC, Nominal, or Less", + "children": [], + "url": "https://2023.antflix.net#300.3_(C)_(1)" + }, + { + "body": "Conductors of circuits rated over 1000 volts ac, 1500 volts dc, nominal, shall not occupy the same equipment wiring enclosure, cable, or raceway with conductors of circuits rated 1000 volts ac, 1500 volts dc, nominal, or less unless permitted in accordance with 305.4. [300.3_(C)_(2)](https://2023.antflix.net#300.3_(C)_(2))", + "displayTitle": "(2) Over 1000 Volts AC, 1500 Volts DC, Nominal", + "children": [], + "url": "https://2023.antflix.net#300.3_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#300.3_(C)" + } + ], + "url": "https://2023.antflix.net#300.3" + }, + { + "body": "Where subject to physical damage, conductors, raceways, and cables shall be protected. [300.4](https://2023.antflix.net#300.4)", + "displayTitle": "300.4 Protection Against Physical Damage", + "children": [ + { + "displayTitle": "(A) Cables and Raceways Through Wood Members", + "children": [ + { + "body": "In both exposed and concealed locations, where a cable- or raceway-type wiring method is installed through bored holes in joists, rafters, or wood members, holes shall be bored so that the edge of the hole is not less than 32 mm (11/4 in.) from the edges of the wood member. Where this distance cannot be maintained, the cable or raceway shall be protected from penetration by screws or nails by a steel plate(s) or bushing(s) at least 1.6 mm (1/16 in.) thick, and of appropriate length and width, installed to cover the area of the wiring. Exception No. 1: Steel plates shall not be required to protect rigid metal conduit, intermediate metal conduit, rigid PVC conduit, RTRC, or electrical metallic tubing. Exception No. 2: A listed and marked steel plate less than 1.6 mm (1/16 in.) thick that provides equal or better protection against nail or screw penetration shall be permitted. [300.4_(A)_(1)](https://2023.antflix.net#300.4_(A)_(1))", + "displayTitle": "(1) Bored Holes", + "children": [], + "url": "https://2023.antflix.net#300.4_(A)_(1)" + }, + { + "body": "Where there is no objection because of weakening the building structure, in both exposed and concealed locations, cables or raceways shall be permitted to be laid in notches in wood studs, joists, rafters, or other wood members where the cable or raceway at those points is protected from penetration by nails or screws by a steel plate at least 1.6 mm (1/16 in.) thick, and of appropriate length and width, installed to cover the area of the wiring. The steel plate shall be installed before the building finish is applied. Exception No. 1: Steel plates shall not be required to protect rigid metal conduit, intermediate metal conduit, rigid nonmetallic conduit, or electrical metallic tubing. Exception No. 2: A listed and marked steel plate less than 1.6 mm (1/16 in.) thick that provides equal or better protection against nail or screw penetration shall be permitted. [300.4_(A)_(2)](https://2023.antflix.net#300.4_(A)_(2))", + "displayTitle": "(2) Notches in Wood", + "children": [], + "url": "https://2023.antflix.net#300.4_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#300.4_(A)" + }, + { + "displayTitle": "(B) Nonmetallic-Sheathed Cables and Electrical Nonmetallic Tubing Through Metal Framing Members", + "children": [ + { + "body": "In both exposed and concealed locations where nonmetallic-sheathed cables pass through either factory- or field-punched, cut, or drilled slots or holes in metal members, the cable shall be protected by listed bushings or listed grommets covering all metal edges that are securely fastened in the opening prior to installation of the cable. [300.4_(B)_(1)](https://2023.antflix.net#300.4_(B)_(1))", + "displayTitle": "(1) Nonmetallic-Sheathed Cable", + "children": [], + "url": "https://2023.antflix.net#300.4_(B)_(1)" + }, + { + "body": "Where nails or screws are likely to penetrate nonmetallic-sheathed cable or electrical nonmetallic tubing, a steel sleeve, steel plate, or steel clip not less than 1.6 mm (1/16 in.) in thickness shall be used to protect the cable or tubing. Exception: A listed and marked steel plate less than 1.6 mm (1/16 in.) thick that provides equal or better protection against nail or screw penetration shall be permitted. [300.4_(B)_(2)](https://2023.antflix.net#300.4_(B)_(2))", + "displayTitle": "(2) Nonmetallic-Sheathed Cable and Electrical Nonmetallic Tubing", + "children": [], + "url": "https://2023.antflix.net#300.4_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#300.4_(B)" + }, + { + "body": "Cables or raceway-type wiring methods, installed behind panels designed to allow access shall be supported according to their applicable articles. [300.4_(C)](https://2023.antflix.net#300.4_(C))", + "displayTitle": "(C) Cables Through Spaces Behind Panels Designed to Allow Access", + "children": [], + "url": "https://2023.antflix.net#300.4_(C)" + }, + { + "body": "In both exposed and concealed locations, where a cable- or raceway-type wiring method is installed parallel to framing members, such as joists, rafters, or studs, or is installed parallel to furring strips, the cable or raceway shall be installed and supported so that the nearest outside surface of the cable or raceway is not less than 32 mm (11/4 in.) from the nearest edge of the framing member or furring strips where nails or screws are likely to penetrate. Where this distance cannot be maintained, the cable or raceway shall be protected from penetration by nails or screws by a steel plate, sleeve, or equivalent at least 1.6 mm (1/16 in.) thick. Exception No. 1: Steel plates, sleeves, or the equivalent shall not be required to protect rigid metal conduit, intermediate metal conduit, rigid nonmetallic conduit, or electrical metallic tubing. Exception No. 2: For concealed work in finished buildings, or finished panels for prefabricated buildings where such supporting is impracticable, it shall be permissible to fish the cables between access points. Exception No. 3: A listed and marked steel plate less than 1.6 mm (1/16 in.) thick that provides equal or better protection against nail or screw penetration shall be permitted. [300.4_(D)](https://2023.antflix.net#300.4_(D))", + "displayTitle": "(D) Cables and Raceways Parallel to Framing Members and Furring Strips", + "children": [], + "url": "https://2023.antflix.net#300.4_(D)" + }, + { + "body": "A cable, raceway, or box, installed in exposed or concealed locations under metal-corrugated sheet roof decking, shall be installed and supported so there is not less than 38 mm (l1/2 in.) measured from the lowest surface of the roof decking to the top of the cable, raceway, or box. A cable, raceway, or box shall not be installed in concealed locations in metal-corrugated, sheet decking\u2014type roof. Informational Note: Roof decking material is often repaired or replaced after the initial raceway or cabling and roofing installation and might be penetrated by screws or other mechanical devices designed to provide \"hold down\" strength of the waterproof membrane or roof insulating material. Exception No. 1: Rigid metal conduit and intermediate metal conduit, with listed steel or malleable iron fittings and boxes, shall not be required to comply with 300.4(E). Exception No. 2: The 38 mm (11/2 in.) spacing is not required where metal-corrugated sheet roof decking is covered with a minimum thickness 50 mm (2 in.) concrete slab, measured from the top of the corrugated roofing. [300.4_(E)](https://2023.antflix.net#300.4_(E))", + "displayTitle": "(E) Cables, Raceways, or Boxes Installed in or Under Metal-Corrugated Roof Decking", + "children": [], + "url": "https://2023.antflix.net#300.4_(E)" + }, + { + "body": "Cable- or raceway-type wiring methods installed in a groove, to be covered by wallboard, siding, paneling, carpeting, or similar finish, shall be protected by 1.6 mm (1/16 in.) thick steel plate, sleeve, or equivalent or by not less than 32-mm (l1/4-in.) free space for the full length of the groove in which the cable or raceway is installed. Exception No. 1: Steel plates, sleeves, or the equivalent shall not be required to protect rigid metal conduit, intermediate metal conduit, rigid PVC conduit, RTRC, or electrical metallic tubing. Exception No. 2: A listed and marked steel plate less than 1.6 mm (1/16 in.) thick that provides equal or better protection against nail or screw penetration shall be permitted. [300.4_(F)](https://2023.antflix.net#300.4_(F))", + "displayTitle": "(F) Cables and Raceways Installed in Shallow Grooves", + "children": [], + "url": "https://2023.antflix.net#300.4_(F)" + }, + { + "body": "Where raceways contain 4 AWG or larger insulated circuit conductors, and these conductors enter a cabinet, a box, an enclosure, or a raceway, prior to the installation of conductors, the conductors shall be protected in accordance with any of the following: An identified fitting providing a smoothly rounded insulating surfaceA listed metal fitting that has smoothly rounded edgesSeparation from the fitting or raceway using an identified insulating material that is securely fastened in placeThreaded hubs or bosses that are an integral part of a cabinet, box, enclosure, or raceway providing a smoothly rounded or flared entry for conductorsConduit bushings constructed wholly of insulating material shall not be used to secure a fitting or raceway. The insulating fitting or insulating material shall have a temperature rating not less than the insulation temperature rating of the installed conductors. [300.4_(G)](https://2023.antflix.net#300.4_(G))", + "displayTitle": "(G) Fittings", + "children": [], + "url": "https://2023.antflix.net#300.4_(G)" + }, + { + "body": "A listed expansion/deflection fitting or other approved means shall be used where a raceway crosses a structural joint intended for expansion, contraction, or deflection, used in buildings, bridges, parking garages, or other structures. [300.4_(H)](https://2023.antflix.net#300.4_(H))", + "displayTitle": "(H) Structural Joints", + "children": [], + "url": "https://2023.antflix.net#300.4_(H)" + } + ], + "url": "https://2023.antflix.net#300.4" + }, + { + "displayTitle": "300.5 Underground Installations", + "children": [ + { + "body": "Direct-buried cable, conduit, or other raceways shall be installed to meet the minimum cover requirements of Table 300.5(A).Table 300.5(A) Minimum Cover Requirements, 0 to 1000 Volts ac, 1500 Volts dc, Nominal, Burial in Millimeters (Inches) Location of Wiring Method or Circuit Type of Wiring Method or Circuit Column 1 Direct Burial Cables or Conductors Column 2 Rigid Metal Conduit or Intermediate Metal Conduit Column 3 Electrical Metallic Tubing, Nonmetallic Raceways Listed for Direct Burial Without Concrete Encasement, or Other Approved Raceways Column 4 Residential Branch Circuits Rated 120 Volts or Less with GFCI Protection and Maximum Overcurrent Protection of 20 Amperes Column 5 Circuits for Control of Irrigation and Landscape Lighting Limited to Not More Than 30 Volts and Installed with Type UF or in Other Identified Cable or Raceway mm in. mm in. mm in. mm in. mm in. All locations not specified below 600 24 150 6 450 18 300 12 1501,2 61,2 In trench below 50 mm (2 in.) thick concrete or equivalent 450 18 150 6 300 12 150 6 150 6 Under a building 0 0 0 0 0 0 0 0 0 0 (in raceway or Type MC or Type MI cable identified for direct burial) (in raceway or Type MC or Type MI cable identified for direct burial) (in raceway or Type MC or Type MI cable identified for direct burial) Under minimum of 102 mm (4 in.) thick concrete exterior slab with no vehicular traffic and the slab extending not less than 152 mm (6 in.) beyond the underground installation 450 18 100 4 100 4 150 (direct burial) 6 150(direct burial) 6 100(in raceway) 4 100(in raceway) 4 Under streets, highways, roads, alleys, driveways, and parking lots 600 24 600 24 600 24 600 24 600 24 One- and two-family dwelling driveways and outdoor parking areas, and used only for dwelling-related purposes 450 18 450 18 450 18 300 12 450 18 In or under airport runways, including adjacent areas where trespassing is prohibited 450 18 450 18 450 18 450 18 450 18 1A lesser depth shall be permitted where specified in the installation instructions of a listed low-voltage lighting system. 2A depth of 150 mm (6 in.) shall be permitted for pool, spa, and fountain lighting, installed in a nonmetallic raceway, limited to not more than 30 volts where part of a listed low-voltage lighting system. Notes:Cover shall be defined as the shortest distance in mm (in.) measured between a point on the top surface of any direct-buried conductor, cable, conduit, or other raceway and the top surface of finished grade, concrete, or similar cover.Raceways approved for burial only where concrete encased shall require a concrete envelope not less than 50 mm (2 in.) thick.Lesser depths shall be permitted where cables and conductors rise for terminations or splices or where access is otherwise required.Where one of the wiring method types listed in Columns 1 through 3 is used for one of the circuit types in Columns 4 and 5, the shallowest depth of burial shall be permitted.Where solid rock prevents compliance with the cover depths specified in this table, the wiring shall be installed in a metal raceway, or a nonmetallic raceway permitted for direct burial. The raceways shall be covered by a minimum of 50 mm (2 in.) of concrete extending down to rock.Directly buried electrical metallic tubing (EMT) shall comply with 358.10. [300.5_(A)](https://2023.antflix.net#300.5_(A))", + "displayTitle": "(A) Minimum Cover Requirements", + "children": [], + "url": "https://2023.antflix.net#300.5_(A)" + }, + { + "body": "The interior of enclosures or raceways installed underground shall be considered to be a wet location. Insulated conductors and cables installed in these enclosures or raceways in underground installations shall comply with 310.10(C). [300.5_(B)](https://2023.antflix.net#300.5_(B))", + "displayTitle": "(B) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#300.5_(B)" + }, + { + "body": "Underground cable and conductors installed under a building shall be in a raceway. Exception No. 1: Type MI cable shall be permitted under a building without installation in a raceway where embedded in concrete, fill, or other masonry in accordance with 332.10(6) or in underground runs where suitably protected against physical damage and corrosive conditions in accordance with 332.10(10). Exception No. 2: Type MC cable listed for direct burial or concrete encasement shall be permitted under a building without installation in a raceway in accordance with 330.10(A)(5) and in wet locations in accordance with 330.10(A)(11). [300.5_(C)](https://2023.antflix.net#300.5_(C))", + "displayTitle": "(C) Underground Cables and Conductors Under Buildings", + "children": [], + "url": "https://2023.antflix.net#300.5_(C)" + }, + { + "body": "Conductors and cables shall be protected from damage in accordance with 300.5(D)(1) through (D)(4). [300.5_(D)](https://2023.antflix.net#300.5_(D))", + "displayTitle": "(D) Protection From Damage", + "children": [ + { + "body": "Direct-buried conductors and cables emerging from grade and specified in Columns 1 and 4 of Table 300.5(A) shall be protected by enclosures or raceways extending from the minimum cover distance below grade required by 300.5(A) to a point at least 2.5 m (8 ft) above finished grade. In no case shall the protection be required to exceed 450 mm (18 in.) below finished grade. [300.5_(D)_(1)](https://2023.antflix.net#300.5_(D)_(1))", + "displayTitle": "(1) Emerging From Grade", + "children": [], + "url": "https://2023.antflix.net#300.5_(D)_(1)" + }, + { + "body": "Conductors entering a building shall be protected to the point of entrance. [300.5_(D)_(2)](https://2023.antflix.net#300.5_(D)_(2))", + "displayTitle": "(2) Conductors Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#300.5_(D)_(2)" + }, + { + "body": "Underground service conductors that are not encased in concrete and that are buried 450 mm (18 in.) or more below grade shall have their location identified by a warning ribbon that is placed in the trench at least 300 mm (12 in.) above the underground installation. [300.5_(D)_(3)](https://2023.antflix.net#300.5_(D)_(3))", + "displayTitle": "(3) Service Conductors", + "children": [], + "url": "https://2023.antflix.net#300.5_(D)_(3)" + }, + { + "body": "Where the enclosure or raceway is subject to physical damage, the conductors shall be installed in electrical metallic tubing, rigid metal conduit, intermediate metal conduit, RTRC-XW, Schedule 80 PVC conduit, or equivalent. [300.5_(D)_(4)](https://2023.antflix.net#300.5_(D)_(4))", + "displayTitle": "(4) Enclosure or Raceway Damage", + "children": [], + "url": "https://2023.antflix.net#300.5_(D)_(4)" + } + ], + "url": "https://2023.antflix.net#300.5_(D)" + }, + { + "body": "Direct-buried conductors or cables shall be permitted to be spliced or tapped without the use of splice boxes. The splices or taps shall be made in accordance with 110.14(B). [300.5_(E)](https://2023.antflix.net#300.5_(E))", + "displayTitle": "(E) Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#300.5_(E)" + }, + { + "body": "Backfill that contains large rocks, paving materials, cinders, large or sharply angular substances, or corrosive material shall not be placed in an excavation where materials might damage raceways, cables, conductors, or other substructures or prevent adequate compaction of fill or contribute to corrosion of raceways, cables, or other substructures. Where necessary to prevent physical damage to the raceway, cable, or conductor, protection shall be provided in the form of granular or selected material, suitable running boards, suitable sleeves, or other approved means. [300.5_(F)](https://2023.antflix.net#300.5_(F))", + "displayTitle": "(F) Backfill", + "children": [], + "url": "https://2023.antflix.net#300.5_(F)" + }, + { + "body": "Conduits or raceways through which moisture might contact live parts shall be sealed or plugged at either or both ends. Spare or unused raceways shall also be sealed. Sealants shall be identified for use with the cable insulation, conductor insulation, bare conductor, shield, or other components. Informational Note: Presence of hazardous gases or vapors might also necessitate the sealing of underground conduits or raceways entering buildings. [300.5_(G)](https://2023.antflix.net#300.5_(G))", + "displayTitle": "(G) Raceway Seals", + "children": [], + "url": "https://2023.antflix.net#300.5_(G)" + }, + { + "body": "A bushing, or terminal fitting, with an integral bushed opening shall be used at the end of a conduit or other raceway that terminates underground where the conductors or cables emerge as a direct burial wiring method. A seal incorporating the physical protection characteristics of a bushing shall be permitted to be used in lieu of a bushing. [300.5_(H)](https://2023.antflix.net#300.5_(H))", + "displayTitle": "(H) Bushing", + "children": [], + "url": "https://2023.antflix.net#300.5_(H)" + }, + { + "body": "All conductors of the same circuit and, where used, the grounded conductor and all equipment grounding conductors shall be installed in the same raceway or cable or shall be installed in close proximity in the same trench. Exception No. 1: Conductors shall be permitted to be installed in parallel in raceways, multiconductor cables, or direct-buried single conductor cables. Each raceway or multiconductor cable shall contain all conductors of the same circuit, including equipment grounding conductors. Each direct-buried single conductor cable shall be located in close proximity in the trench to the other single conductor cables in the same parallel set of conductors in the circuit, including equipment grounding conductors. Exception No. 2: Isolated phase, polarity, grounded conductor, and equipment grounding and bonding conductor installations shall be permitted in nonmetallic raceways or cables with a nonmetallic covering or nonmagnetic sheath in close proximity where conductors are paralleled as permitted in 310.10(G), and where the conditions of 300.20(B) are met. [300.5_(I)](https://2023.antflix.net#300.5_(I))", + "displayTitle": "(I) Conductors of the Same Circuit", + "children": [], + "url": "https://2023.antflix.net#300.5_(I)" + }, + { + "body": "Where direct-buried conductors, raceways, or cables are subject to movement by settlement or frost, direct-buried conductors, raceways, or cables shall be arranged so as to prevent damage to the enclosed conductors or to equipment connected to the raceways. Informational Note: This section recognizes \"S\" loops in underground direct burial cables and conductors to raceway transitions, expansion fittings in raceway risers to fixed equipment, and, generally, the provision of flexible connections to equipment subject to settlement or frost heaves. [300.5_(J)](https://2023.antflix.net#300.5_(J))", + "displayTitle": "(J) Earth Movement", + "children": [], + "url": "https://2023.antflix.net#300.5_(J)" + }, + { + "body": "Cables or raceways installed using directional boring equipment shall be approved for the purpose. [300.5_(K)](https://2023.antflix.net#300.5_(K))", + "displayTitle": "(K) Directional Boring", + "children": [], + "url": "https://2023.antflix.net#300.5_(K)" + } + ], + "url": "https://2023.antflix.net#300.5" + }, + { + "body": "Raceways, cable trays, cablebus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, enclosures (other than surrounding fences and walls), elbows, couplings, fittings, supports, and support hardware shall be of materials suitable for the environment in which they are to be installed. [300.6](https://2023.antflix.net#300.6)", + "displayTitle": "300.6 Protection Against Corrosion and Deterioration", + "children": [ + { + "body": "Ferrous metal raceways, cable trays, cablebus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, enclosures (other than surrounding fences and walls), elbows, couplings, nipples, fittings, supports, and support hardware shall be suitably protected against corrosion inside and outside (except threads at joints) by a coating of approved corrosion-resistant material. Where corrosion protection is necessary and the conduit is threaded anywhere other than at the factory where the product is listed, the threads shall be coated with an approved electrically conductive, corrosion-resistant compound. Exception: Stainless steel shall not be required to have protective coatings. [300.6_(A)](https://2023.antflix.net#300.6_(A))", + "displayTitle": "(A) Ferrous Metal Equipment", + "children": [ + { + "body": "Where protected from corrosion solely by enamel, ferrous metal raceways, cable trays, cablebus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, enclosures (other than surrounding fences and walls), elbows, couplings, nipples, fittings, supports, and support hardware shall not be used outdoors or in wet locations as described in 300.6(D). [300.6_(A)_(1)](https://2023.antflix.net#300.6_(A)_(1))", + "displayTitle": "(1) Protected From Corrosion Solely by Enamel", + "children": [], + "url": "https://2023.antflix.net#300.6_(A)_(1)" + }, + { + "body": "Where boxes, cabinets, or enclosures (other than surrounding fences and walls) have an approved system of organic coatings and are marked \"Raintight,\" \"Rainproof,\" or \"Outdoor Type,\" they shall be permitted outdoors. [300.6_(A)_(2)](https://2023.antflix.net#300.6_(A)_(2))", + "displayTitle": "(2) Organic Coatings on Boxes or Cabinets", + "children": [], + "url": "https://2023.antflix.net#300.6_(A)_(2)" + }, + { + "body": "Ferrous metal raceways, cable armor, boxes, cable sheathing, cabinets, enclosures (other than surrounding fences and walls), elbows, couplings, nipples, fittings, supports, and support hardware shall be permitted to be installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influences where made of material approved for the condition or where provided with corrosion protection approved for the condition. [300.6_(A)_(3)](https://2023.antflix.net#300.6_(A)_(3))", + "displayTitle": "(3) In Concrete or in Direct Contact With the Earth", + "children": [], + "url": "https://2023.antflix.net#300.6_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#300.6_(A)" + }, + { + "body": "Aluminum raceways, cable trays, cablebus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, enclosures (other than surrounding fences and walls), elbows, couplings, nipples, fittings, supports, and support hardware embedded or encased in concrete or in direct contact with the earth shall be provided with supplementary corrosion protection. [300.6_(B)](https://2023.antflix.net#300.6_(B))", + "displayTitle": "(B) Aluminum Metal Equipment", + "children": [], + "url": "https://2023.antflix.net#300.6_(B)" + }, + { + "body": "Nonmetallic raceways, cable trays, cablebus, auxiliary gutters, boxes, cables with a nonmetallic outer jacket and internal metal armor or jacket, cable sheathing, cabinets, enclosures (other than surrounding fences and walls), elbows, couplings, nipples, fittings, supports, and support hardware shall be made of material approved for the condition and shall comply with 300.6(C)(1) and (C)(2) as applicable to the specific installation. [300.6_(C)](https://2023.antflix.net#300.6_(C))", + "displayTitle": "(C) Nonmetallic Equipment", + "children": [ + { + "body": "Where exposed to sunlight, the materials shall be listed as sunlight resistant or shall be identified as sunlight resistant. [300.6_(C)_(1)](https://2023.antflix.net#300.6_(C)_(1))", + "displayTitle": "(1) Exposed to Sunlight", + "children": [], + "url": "https://2023.antflix.net#300.6_(C)_(1)" + }, + { + "body": "Where subject to exposure to chemical solvents, vapors, splashing, or immersion, materials or coatings shall either be inherently resistant to chemicals based on their listing or be identified for the specific chemical reagent. [300.6_(C)_(2)](https://2023.antflix.net#300.6_(C)_(2))", + "displayTitle": "(2) Chemical Exposure", + "children": [], + "url": "https://2023.antflix.net#300.6_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#300.6_(C)" + }, + { + "body": "In portions of dairy processing facilities, laundries, canneries, and other indoor wet locations, and in locations where walls are frequently washed or where there are surfaces of absorbent materials, such as damp paper or wood, the entire wiring system, where installed exposed, including all boxes, cabinets, enclosures (other than surrounding fences and walls), fittings, raceways, and cable used therewith, shall be mounted so that there is at least a 6 mm (1/4 in.) airspace between it and the wall or supporting surface. Exception: Nonmetallic raceways, boxes, and fittings shall be permitted to be installed without the airspace on a concrete, masonry, tile, or similar surface. Informational Note: In general, areas where acids and alkali chemicals are handled and stored might present such corrosive conditions, particularly when wet or damp. Severe corrosive conditions might also be present in portions of meatpacking plants, tanneries, glue houses, and some stables; in installations immediately adjacent to a seashore and swimming pool areas; in areas where chemical deicers are used; and in storage cellars or rooms for hides, casings, fertilizer, salt, and bulk chemicals. [300.6_(D)](https://2023.antflix.net#300.6_(D))", + "displayTitle": "(D) Indoor Wet Locations", + "children": [], + "url": "https://2023.antflix.net#300.6_(D)" + } + ], + "url": "https://2023.antflix.net#300.6" + }, + { + "displayTitle": "300.7 Raceways Exposed to Different Temperatures", + "children": [ + { + "body": "Where portions of a raceway or sleeve are known to be subjected to different temperatures, and where condensation is known to be a problem, as in cold storage areas of buildings or where passing from the interior to the exterior of a building, the raceway or sleeve shall be sealed to prevent the circulation of warm air to a colder section of the raceway or sleeve. Sealants shall be identified for use with cable insulation, conductor insulation, a bare conductor, a shield, or other components. An explosionproof seal shall not be required for this purpose. [300.7_(A)](https://2023.antflix.net#300.7_(A))", + "displayTitle": "(A) Sealing", + "children": [], + "url": "https://2023.antflix.net#300.7_(A)" + }, + { + "body": "Raceways shall be provided with expansion, expansion-deflection, or deflection fittings where necessary to compensate for thermal expansion, deflection, and contraction. Informational Note No. 1: Table 352.44(A) and Table 355.44 provide the expansion information for polyvinyl chloride (PVC) and for reinforced thermosetting resin conduit (RTRC), respectively. A nominal number for steel conduit can be determined by multiplying the expansion length in Table 352.44(A) by 0.20. The coefficient of expansion for steel electrical metallic tubing, intermediate metal conduit, and rigid metal conduit is 1.170 \u00d7 10-5 (0.0000117) mm per mm of conduit for each \u00b0C in temperature change) [0.650 \u00d7 10-5 (0.0000065 in. per in. of conduit for each \u00b0F in temperature change)]. A nominal number for aluminum conduit and aluminum electrical metallic tubing can be determined by multiplying the expansion length in Table 352.44(A) by 0.40. The coefficient of expansion for aluminum electrical metallic tubing and aluminum rigid metal conduit is 2.34 \u00d7 10-5 (0.0000234 mm per mm of conduit for each \u00b0C in temperature change) [1.30 \u00d7 10-5 (0.000013 in. per in. of conduit for each \u00b0F in temperature change)]. Informational Note No. 2: See NEMA FB 2.40-2019, Installation Guidelines for Expansion and Expansion/Deflection Fittings, for further information on expansion and expansion deflection fittings. [300.7_(B)](https://2023.antflix.net#300.7_(B))", + "displayTitle": "(B) Expansion, Expansion-Deflection, and Deflection Fittings", + "children": [], + "url": "https://2023.antflix.net#300.7_(B)" + } + ], + "url": "https://2023.antflix.net#300.7" + }, + { + "body": "Raceways or cable trays containing electrical conductors shall not contain any pipe, tube, or equal for steam, water, air, gas, drainage, or any service other than electrical. [300.8](https://2023.antflix.net#300.8)", + "displayTitle": "300.8 Installation of Conductors With Other Systems", + "children": [], + "url": "https://2023.antflix.net#300.8" + }, + { + "body": "Where raceways are installed in wet locations above grade, the interior of these raceways shall be considered to be a wet location. Insulated conductors and cables installed in raceways in wet locations above grade shall comply with 310.10(C). [300.9](https://2023.antflix.net#300.9)", + "displayTitle": "300.9 Raceways in Wet Locations Above Grade", + "children": [], + "url": "https://2023.antflix.net#300.9" + }, + { + "body": "Metal raceways, cable armor, and other metal enclosures for conductors shall be metallically joined together into a continuous electrical conductor and shall be connected to all boxes, fittings, and cabinets to provide effective electrical continuity. Unless specifically permitted elsewhere in this Code, raceways and cable assemblies shall be mechanically secured to boxes, fittings, cabinets, and other enclosures. Exception No. 1: Short sections of raceways used to provide support or protection of cable assemblies from physical damage shall not be required to be made electrically continuous. Exception No. 2: Equipment enclosures to be isolated, as permitted by 250.96(B), shall not be required to be metallically joined to the metal raceway. [300.10](https://2023.antflix.net#300.10)", + "displayTitle": "300.10 Electrical Continuity of Metal Raceways, Cable Armor, and Enclosures", + "children": [], + "url": "https://2023.antflix.net#300.10" + }, + { + "displayTitle": "300.11 Securing and Supporting", + "children": [ + { + "body": "Raceways, cable assemblies, boxes, cabinets, and fittings shall be securely fastened in place. [300.11_(A)](https://2023.antflix.net#300.11_(A))", + "displayTitle": "(A) Secured in Place", + "children": [], + "url": "https://2023.antflix.net#300.11_(A)" + }, + { + "body": "Support wires that do not provide secure support shall not be the sole support. Support wires and associated fittings that provide secure support and that are installed in addition to the ceiling grid support wires shall be permitted as the sole support. Where independent support wires are used, they shall be secured at both ends. Cables and raceways shall not be supported by ceiling grids. [300.11_(B)](https://2023.antflix.net#300.11_(B))", + "displayTitle": "(B) Wiring Systems Installed Above Suspended Ceilings", + "children": [ + { + "body": "Wiring located within the cavity of a fire-rated floor-ceiling or roof-ceiling assembly shall not be secured to, or supported by, the ceiling assembly, including the ceiling support wires. An independent means of secure support shall be provided and shall be permitted to be attached to the assembly. Where independent support wires are used, they shall be distinguishable by color, tagging, or other effective means from those that are part of the fire-rated design. Exception: The ceiling support system shall be permitted to support wiring and equipment that have been tested as part of the fire-rated assembly. Informational Note: See ASTM E119, Standard Test Methods for Fire Tests of Building Construction and Materials, for one method of testing to determine fire rating. [300.11_(B)_(1)](https://2023.antflix.net#300.11_(B)_(1))", + "displayTitle": "(1) Fire-Rated Assemblies", + "children": [], + "url": "https://2023.antflix.net#300.11_(B)_(1)" + }, + { + "body": "Wiring located within the cavity of a non-fire-rated floor-ceiling or roof-ceiling assembly shall not be secured to, or supported by, the ceiling assembly, including the ceiling support wires. An independent means of secure support shall be provided and shall be permitted to be attached to the assembly. Where independent support wires are used, they shall be distinguishable by color, tagging, or other effective means. Exception: The ceiling support system shall be permitted to support branch-circuit wiring and associated equipment where installed in accordance with the ceiling system manufacturer's instructions. [300.11_(B)_(2)](https://2023.antflix.net#300.11_(B)_(2))", + "displayTitle": "(2) Non-Fire-Rated Assemblies", + "children": [], + "url": "https://2023.antflix.net#300.11_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#300.11_(B)" + }, + { + "body": "Raceways shall be used only as a means of support for other raceways, cables, or nonelectrical equipment under any of the following conditions: Where the raceway or means of support is identified as a means of supportWhere the raceway contains power supply conductors for electrically controlled equipment and is used to support Class 2 or Class 3 circuit conductors or cables that are solely for the purpose of connection to the equipment control circuitsWhere the raceway is used to support boxes or conduit bodies in accordance with 314.23 or to support luminaires in accordance with 410.36(E) [300.11_(C)](https://2023.antflix.net#300.11_(C))", + "displayTitle": "(C) Raceways Used as Means of Support", + "children": [], + "url": "https://2023.antflix.net#300.11_(C)" + }, + { + "body": "Cable wiring methods shall not be used as a means of support for other cables, raceways, or nonelectrical equipment. [300.11_(D)](https://2023.antflix.net#300.11_(D))", + "displayTitle": "(D) Cables Not Used as Means of Support", + "children": [], + "url": "https://2023.antflix.net#300.11_(D)" + } + ], + "url": "https://2023.antflix.net#300.11" + }, + { + "body": "Raceways, cable armors, and cable sheaths shall be continuous between cabinets, boxes, conduit bodies, fittings, or other enclosures or outlets. Exception No. 1: Short sections of raceways used to provide support or protection of cable assemblies from physical damage shall not be required to be mechanically continuous. Exception No. 2: Raceways and cables installed into the bottom of open bottom equipment, such as switchboards, motor control centers, and floor or pad-mounted transformers, shall not be required to be mechanically secured to the equipment. [300.12](https://2023.antflix.net#300.12)", + "displayTitle": "300.12 Mechanical Continuity - Raceways and Cables", + "children": [], + "url": "https://2023.antflix.net#300.12" + }, + { + "displayTitle": "300.13 Mechanical and Electrical Continuity - Conductors", + "children": [ + { + "body": "Conductors in raceways shall be continuous between outlets, boxes, devices, and so forth. There shall be no splice or tap within a raceway unless permitted by 300.15, 368.56(A), 376.56, 378.56, 384.56, 386.56, 388.56, or 390.56. [300.13_(A)](https://2023.antflix.net#300.13_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#300.13_(A)" + }, + { + "body": "In multiwire branch circuits, the continuity of a grounded conductor shall not depend on device connections such as lampholders, receptacles, and so forth where the removal of such devices would interrupt the continuity. [300.13_(B)](https://2023.antflix.net#300.13_(B))", + "displayTitle": "(B) Device Removal", + "children": [], + "url": "https://2023.antflix.net#300.13_(B)" + } + ], + "url": "https://2023.antflix.net#300.13" + }, + { + "body": "At least 150 mm (6 in.) of free conductor, measured from the point in the box where it emerges from its raceway or cable sheath, shall be left at each outlet, junction, and switch point for splices or the connection of luminaires or devices. The 150 mm (6 in.) free conductor shall be permitted to be spliced or unspliced. Where the opening to an outlet, junction, or switch point is less than 200 mm (8 in.) in any dimension, each conductor shall be long enough to extend at least 75 mm (3 in.) outside the opening. Exception: Conductors that are not spliced or terminated at the outlet, junction, or switch point shall not be required to comply with 300.14. [300.14](https://2023.antflix.net#300.14)", + "displayTitle": "300.14 Length of Free Conductors at Outlets, Junctions, and Switch Points", + "children": [], + "url": "https://2023.antflix.net#300.14" + }, + { + "body": "A box shall be installed at each outlet and switch point for concealed knob-and-tube wiring. Fittings and connectors shall be used only with the specific wiring methods for which they are designed and listed. Where the wiring method is conduit, tubing, Type AC cable, Type MC cable, Type MI cable, nonmetallic-sheathed cable, or other cables, a box or conduit body shall be installed at each outlet point, switch point, conductor splice point, conductor junction point, conductor termination point, wiring method transition point, or conductor pull point, unless otherwise permitted in 300.15(A) through (L). [300.15](https://2023.antflix.net#300.15)", + "displayTitle": "300.15 Boxes, Conduit Bodies, or Fittings - Where Required", + "children": [ + { + "body": "A box or conduit body shall not be required for each splice, junction, switch, pull, termination, or outlet points in wiring methods with removable covers, such as wireways, multioutlet assemblies, auxiliary gutters, and surface raceways. The covers shall be accessible after installation. [300.15_(A)](https://2023.antflix.net#300.15_(A))", + "displayTitle": "(A) Wiring Methods With Interior Access", + "children": [], + "url": "https://2023.antflix.net#300.15_(A)" + }, + { + "body": "An integral junction box or wiring compartment as part of approved equipment shall be permitted in lieu of a box. [300.15_(B)](https://2023.antflix.net#300.15_(B))", + "displayTitle": "(B) Equipment", + "children": [], + "url": "https://2023.antflix.net#300.15_(B)" + }, + { + "body": "A box or conduit body shall not be required where cables enter or exit from conduit or tubing that is used to provide cable support or protection against physical damage. A fitting shall be provided on the end(s) of the conduit or tubing to protect the cable from abrasion. [300.15_(C)](https://2023.antflix.net#300.15_(C))", + "displayTitle": "(C) Protection", + "children": [], + "url": "https://2023.antflix.net#300.15_(C)" + }, + { + "body": "A box or conduit body shall not be required where accessible fittings are used for straight-through splices in mineral-insulated metal-sheathed cable. [300.15_(D)](https://2023.antflix.net#300.15_(D))", + "displayTitle": "(D) Type MI Cable", + "children": [], + "url": "https://2023.antflix.net#300.15_(D)" + }, + { + "body": "A wiring device with integral enclosure identified for the use, having brackets that securely fasten the device to walls or ceilings of conventional on-site frame construction, for use with nonmetallic-sheathed cable, shall be permitted in lieu of a box or conduit body. Informational Note: See 334.30(C); 545.10; 550.15(I); 551.47(E), Exception No. 1; and 552.48(E), Exception No. 1. [300.15_(E)](https://2023.antflix.net#300.15_(E))", + "displayTitle": "(E) Integral Enclosure", + "children": [], + "url": "https://2023.antflix.net#300.15_(E)" + }, + { + "body": "A fitting identified for the use shall be permitted in lieu of a box or conduit body where conductors are not spliced or terminated within the fitting. The fitting shall be accessible after installation, unless listed for concealed installation. [300.15_(F)](https://2023.antflix.net#300.15_(F))", + "displayTitle": "(F) Fitting", + "children": [], + "url": "https://2023.antflix.net#300.15_(F)" + }, + { + "body": "As permitted in 300.5(E), a box or conduit body shall not be required for splices and taps in direct-buried conductors and cables. [300.15_(G)](https://2023.antflix.net#300.15_(G))", + "displayTitle": "(G) Direct-Buried Conductors and Cables", + "children": [], + "url": "https://2023.antflix.net#300.15_(G)" + }, + { + "body": "As permitted in 334.40(B), a box or conduit body shall not be required for insulated devices supplied by nonmetallic-sheathed cable. [300.15_(H)](https://2023.antflix.net#300.15_(H))", + "displayTitle": "(H) Insulated Devices", + "children": [], + "url": "https://2023.antflix.net#300.15_(H)" + }, + { + "body": "A box or conduit body shall not be required where a splice, switch, terminal, or pull point is in a cabinet or cutout box, in an enclosure for a switch or overcurrent device as permitted in 312.8, in a motor controller as permitted in 430.10(A), or in a motor control center. [300.15_(I)](https://2023.antflix.net#300.15_(I))", + "displayTitle": "(I) Enclosures", + "children": [], + "url": "https://2023.antflix.net#300.15_(I)" + }, + { + "body": "A box or conduit body shall not be required where a luminaire is used as a raceway as permitted in 410.64. [300.15_(J)](https://2023.antflix.net#300.15_(J))", + "displayTitle": "(J) Luminaires", + "children": [], + "url": "https://2023.antflix.net#300.15_(J)" + }, + { + "body": "A box or conduit body shall not be required for splices where conductors are embedded as permitted in 424.40, 424.41 (D), 426.22(C), 426.24(A), and 427.19(A). [300.15_(K)](https://2023.antflix.net#300.15_(K))", + "displayTitle": "(K) Embedded", + "children": [], + "url": "https://2023.antflix.net#300.15_(K)" + }, + { + "body": "A box or conduit body shall not be required for conductors in manholes or handhole enclosures, except where connecting to electrical equipment. The installation shall comply with Part V of Article 110 for manholes, and 314.30 for handhole enclosures. [300.15_(L)](https://2023.antflix.net#300.15_(L))", + "displayTitle": "(L) Manholes and Handhole Enclosures", + "children": [], + "url": "https://2023.antflix.net#300.15_(L)" + } + ], + "url": "https://2023.antflix.net#300.15" + }, + { + "displayTitle": "300.16 Raceway or Cable to Open or Concealed Wiring", + "children": [ + { + "body": "A box, conduit body, or terminal fitting having a separately bushed hole for each conductor shall be used wherever a change is made from conduit, electrical metallic tubing, electrical nonmetallic tubing, nonmetallic-sheathed cable, Type AC cable, Type MC cable, or mineral-insulated, metal-sheathed cable and surface raceway wiring to open wiring or to concealed knob-and-tube wiring. A fitting used for this purpose shall contain no taps or splices and shall not be used at luminaire outlets. A conduit body used for this purpose shall contain no taps or splices unless it complies with 314.16(C)(2). [300.16_(A)](https://2023.antflix.net#300.16_(A))", + "displayTitle": "(A) Box, Conduit Body, or Fitting", + "children": [], + "url": "https://2023.antflix.net#300.16_(A)" + }, + { + "body": "A bushing shall be permitted in lieu of a box or terminal where the conductors emerge from a raceway and enter or terminate at equipment, such as open switchboards, unenclosed control equipment, or similar equipment. The bushing shall be of the insulating type for other than lead-sheathed conductors. [300.16_(B)](https://2023.antflix.net#300.16_(B))", + "displayTitle": "(B) Bushing", + "children": [], + "url": "https://2023.antflix.net#300.16_(B)" + } + ], + "url": "https://2023.antflix.net#300.16" + }, + { + "body": "The number and size of conductors and cables in any raceway shall not be more than will permit dissipation of the heat and ready installation or withdrawal of the conductors or cables without damage to the conductors or cables, or to their insulation. Informational Note: See the following sections of this Code. intermediate metal conduit, 342.22; rigid metal conduit, 344.22: flexible metal conduit, 348.22; liquidtight flexible metal conduit, 350.22; PVC conduit, 352.22; HDPE conduit, 353.22; RTRC, 355.22; liquidtight nonmetallic flexible conduit, 356.22; electrical metallic tubing, 358.22; flexible metallic tubing, 360.22; electrical nonmetallic tubing, 362.22; cellular concrete floor raceways, 372.22; cellular metal floor raceways, 374.22: metal wireways, 376.22; nonmetallic wireways, 378.22; surface metal raceways, 386.22; surface nonmetallic raceways, 388.22; underfloor raceways, 390.22; fixture wire, 402.7; theaters, 520.6; signs, 600.31(C); elevators, 620.33; audio signal processing, amplification, and reproduction equipment, 640.23(A) and 640.24; Class 1 circuits, 724.3(A); Class 2, Class 3, Class 4, and power-limited fire alarm (PLFA) circuits, 722.3(A); non-power-limited fire alarm (NPLFA) circuits, 760.3(H); and optical fiber cables and raceways, 770.110(B). [300.17](https://2023.antflix.net#300.17)", + "displayTitle": "300.17 Number and Size of Conductors and Cables in Raceway", + "children": [], + "url": "https://2023.antflix.net#300.17" + }, + { + "displayTitle": "300.18 Raceway Installations", + "children": [ + { + "body": "Raceways other than busways, listed manufactured assemblies in accordance with 604.100, or exposed raceways having hinged or removable covers shall be installed complete between outlet, junction, or splicing points prior to the installation of conductors or cables. Where required to facilitate the installation of utilization equipment, the raceway shall be permitted to be initially installed without a terminating connection at the equipment. Prewired raceway assemblies shall be permitted only where specifically permitted in this Code for the applicable wiring method. Exception: Short sections of raceways used to contain conductors or cable assemblies for protection from physical damage shall not be required to be installed complete between outlet, junction, or splicing points. [300.18_(A)](https://2023.antflix.net#300.18_(A))", + "displayTitle": "(A) Complete Runs", + "children": [], + "url": "https://2023.antflix.net#300.18_(A)" + }, + { + "body": "Metal raceways shall not be supported, terminated, or connected by welding to the raceway unless specifically designed to be or otherwise specifically permitted to be in this Code. [300.18_(B)](https://2023.antflix.net#300.18_(B))", + "displayTitle": "(B) Welding", + "children": [], + "url": "https://2023.antflix.net#300.18_(B)" + } + ], + "url": "https://2023.antflix.net#300.18" + }, + { + "displayTitle": "300.19 Supporting Conductors in Vertical Raceways", + "children": [ + { + "body": "Conductors in vertical raceways shall be supported if the vertical rise exceeds the values in Table 300.19(A). At least one support method shall be provided for each conductor at the top of the vertical raceway or as close to the top as practical. Intermediate supports shall be provided as necessary to limit supported conductor lengths to not greater than those values specified in Table 300.19(A). Exception: Steel wire armor cable shall be supported at the top of the riser with a cable support that clamps the steel wire armor. A safety device shall be permitted at the lower end of the riser to hold the cable in the event there is slippage of the cable in the wire-armored cable support. Additional wedge-type supports shall be permitted to relieve the strain on the equipment terminals caused by expansion of the cable under load.\nTable 300.19(A) Spacings for Conductor Supports Conductor Size Support of Conductors in Vertical Raceways Conductors Aluminum or Copper-Clad Aluminum Copper m ft m ft 18 AWG through 8 AWG Not greater than 30 100 30 100 6AWG through 1/0 AWG Not greater than 60 200 30 100 2/0 AWG through 4/0 AWG Not greater than 55 180 25 80 Over 4/0 AWG through 350 kcmil Not greater than 41 135 18 60 Over 350 kcmil through 500 kcmil Not greater than 36 120 15 50 Over 500 kcmil through 750 kcmil Not greater than 28 95 12 40 Over 750 kcmil Not greater than 26 85 11 35 [300.19_(A)](https://2023.antflix.net#300.19_(A))", + "displayTitle": "(A) Spacing Intervals - Maximum", + "children": [], + "url": "https://2023.antflix.net#300.19_(A)" + }, + { + "body": "Support methods and spacing intervals for fire-resistive cables and conductors shall comply with any restrictions provided in the listing of the electrical circuit protective system or fire-resistive cable system used and in no case shall exceed the values in Table 300.19(A). [300.19_(B)](https://2023.antflix.net#300.19_(B))", + "displayTitle": "(B) Fire-Resistive Cables and Conductors", + "children": [], + "url": "https://2023.antflix.net#300.19_(B)" + }, + { + "body": "One of the following methods of support shall be used: Clamping devices constructed of or employing insulating wedges inserted in the ends of the raceways. Where clamping of insulation does not adequately support the cable, the conductor also shall be clamped.Inserting boxes at the required intervals in which insulating supports are installed and secured in an approved manner to withstand the weight of the conductors attached thereto, the boxes being provided with covers.In junction boxes, deflecting the cables not less than 90 degrees and carrying them horizontally to a distance not less than twice the diameter of the cable, with the cables being carried on two or more insulating supports and additionally secured thereto by tie wires, if desired. Where this method is used, cables shall be supported at intervals not greater than 20 percent of the support spacing in Table 300.19(A).Other approved means. [300.19_(C)](https://2023.antflix.net#300.19_(C))", + "displayTitle": "(C) Support Methods", + "children": [], + "url": "https://2023.antflix.net#300.19_(C)" + } + ], + "url": "https://2023.antflix.net#300.19" + }, + { + "displayTitle": "300.20 Induced Currents in Ferrous Metal Enclosures or Ferrous Metal Raceways", + "children": [ + { + "body": "Where conductors carrying alternating current are installed in ferrous metal enclosures or ferrous metal raceways, they shall be arranged so as to avoid heating the surrounding ferrous metal by induction. To accomplish this, all phase conductors and, where used, the grounded conductor and all equipment grounding conductors shall be grouped together. Exception No. 1: Equipment grounding conductors for certain existing installations shall be permitted to be installed separate from their associated circuit conductors where run in accordance with 250.130(C). Exception No. 2: A single conductor shall be permitted to be installed in a ferromagnetic enclosure and used for skin-effect heating in accordance with 426.42 and 427.47. [300.20_(A)](https://2023.antflix.net#300.20_(A))", + "displayTitle": "(A) Conductors Grouped Together", + "children": [], + "url": "https://2023.antflix.net#300.20_(A)" + }, + { + "body": "Where a single conductor carrying alternating current passes through metal with magnetic properties, the inductive effect shall be minimized by either cutting slots in the metal between the individual holes through which the individual conductors pass or passing all the conductors in the circuit through an insulating wall sufficiently large for all of the conductors of the circuit. Exception: In the case of circuits supplying vacuum or electric-discharge lighting systems or signs or X-ray apparatus, the currents carried by the conductors are so small that the inductive heating effect can be ignored where these conductors are placed in metal enclosures or pass through metal. Informational Note: Because aluminum is not a magnetic metal, there will be no heating due to hysteresis; however, induced currents will be present. They will not be of sufficient magnitude to require grouping of conductors or special treatment in passing conductors through aluminum wall sections. [300.20_(B)](https://2023.antflix.net#300.20_(B))", + "displayTitle": "(B) Individual Conductors", + "children": [], + "url": "https://2023.antflix.net#300.20_(B)" + } + ], + "url": "https://2023.antflix.net#300.20" + }, + { + "body": "Electrical installations in hollow spaces, vertical shafts, and ventilation or air-handling ducts shall be made so that the possible spread of fire or products of combustion will not be substantially increased. Openings around electrical penetrations into or through fire-resistant-rated walls, partitions, floors, or ceilings shall be firestopped using approved methods to maintain the fire resistance rating. Informational Note: Directories of electrical construction materials published by qualified testing laboratories contain many listing installation restrictions necessary to maintain the fire-resistive rating of assemblies where penetrations or openings are made. Building codes also contain restrictions on membrane penetrations on opposite sides of a fire-resistance-rated wall assembly. An example is the 600-mm (24-in.) minimum horizontal separation that usually applies between boxes installed on opposite sides of the wall. Assistance in complying with the requirements of 300.21 can be found in building codes, fire resistance directories, and product listings. [300.21](https://2023.antflix.net#300.21)", + "displayTitle": "300.21 Spread of Fire or Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#300.21" + }, + { + "body": "The requirements of this section shall apply to the installation and uses of electrical wiring and equipment in ducts used for dust, loose stock, or vapor removal; ducts specifically fabricated for environmental air; and other spaces used for environmental air (plenums). Informational Note: See Part VI of Article 424 for requirements on duct heaters. [300.22](https://2023.antflix.net#300.22)", + "displayTitle": "300.22 Wiring in Ducts Not Used for Air Handling, Fabricated Ducts for Environmental Air, and Other Spaces for Environmental Air (Plenums)", + "children": [ + { + "body": "No wiring systems of any type shall be installed in ducts used to transport dust, loose stock, or flammable vapors. No wiring system of any type shall be installed in any duct, or shaft containing only such ducts, used for vapor removal or for ventilation of commercial-type cooking equipment. [300.22_(A)](https://2023.antflix.net#300.22_(A))", + "displayTitle": "(A) Ducts for Dust, Loose Stock, or Vapor Removal", + "children": [], + "url": "https://2023.antflix.net#300.22_(A)" + }, + { + "body": "Equipment, devices, and the wiring methods specified in this section shall be permitted within such ducts only if necessary for the direct action upon, or sensing of, the contained air. Where equipment or devices are installed and illumination is necessary to facilitate maintenance and repair, enclosed gasketed-type luminaires shall be permitted. Only wiring methods consisting of Type MI cable without an overall nonmetallic covering, Type MC cable employing a smooth or corrugated impervious metal sheath without an overall nonmetallic covering, electrical metallic tubing, flexible metallic tubing, intermediate metal conduit, or rigid metal conduit without an overall nonmetallic covering shall be installed in ducts specifically fabricated to transport environmental air. Flexible metal conduit shall be permitted, in lengths not to exceed 1.2 m (4 ft), to connect physically adjustable equipment and devices permitted to be in these fabricated ducts. The connectors used with flexible metal conduit shall effectively close any openings in the connection. Exception: Wiring methods and cabling systems, listed for use in other spaces used for environmental air (plenums), shall be permitted to be installed in ducts specifically fabricated for environmental air-handling purposes under both of the following conditions: (1) The wiring methods or cabling systems shall be permitted only if necessary to connect to equipment or devices associated with the direct action upon or sensing of the contained air. (2) The total length of such wiring methods or cabling systems shall not exceed 1.2 m (4 ft). [300.22_(B)](https://2023.antflix.net#300.22_(B))", + "displayTitle": "(B) Ducts Specifically Fabricated for Environmental Air", + "children": [], + "url": "https://2023.antflix.net#300.22_(B)" + }, + { + "body": "This section shall apply to spaces not specifically fabricated for environmental air-handling purposes but used for air-handling purposes as a plenum. This section shall not apply to habitable rooms or areas of buildings, the prime purpose of which is not air handling. Informational Note No. 1: The space over a hung ceiling used for environmental air-handling purposes is an example of the type of other space to which this section applies. Informational Note No. 2: See NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems, and other mechanical codes for information on how the term other spaces used for environmental air (plenum), as used in this section, correlates with the use of the term plenum where the plenum is used for return air purposes, as well as some other air-handling spaces. Exception: This section shall not apply to the joist or stud spaces of dwelling units where the wiring passes through such spaces perpendicular to the long dimension of such spaces. [300.22_(C)](https://2023.antflix.net#300.22_(C))", + "displayTitle": "(C) Other Spaces Used for Environmental Air (Plenums)", + "children": [ + { + "body": "The wiring methods for other spaces used for environmental air shall be limited to totally enclosed, nonventilated, insulated busway having no provisions for plugin connections, Type MI cable without an overall nonmetallic covering, Type MC cable without an overall nonmetallic covering, Type AC cable, or other factory-assembled multiconductor control or power cable that is specifically listed for use within an air-handling space, or listed prefabricated cable assemblies of metallic manufactured wiring systems without nonmetallic sheath. Other types of cables, conductors, and raceways shall be permitted to be installed in electrical metallic tubing, flexible metallic tubing, intermediate metal conduit, rigid metal conduit without an overall nonmetallic covering, flexible metal conduit, or, where accessible, surface metal raceway or metal wireway with metal covers. Nonmetallic cable ties and other nonmetallic cable accessories used to secure and support cables shall be listed as having low smoke and heat release properties. Informational Note: See UL 2043, Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces, for one method of testing low smoke and heat release properties for nonmetallic cable ties and other nonmetallic cable accessories to determine a maximum peak optical density of 0.50 or less, an average optical density of 0.15 or less, and a peak heat release rate of 100 kW or less. [300.22_(C)_(1)](https://2023.antflix.net#300.22_(C)_(1))", + "displayTitle": "(1) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#300.22_(C)_(1)" + }, + { + "body": "The requirements in 300.22(C)(2)(a) or (C)(2)(b) shall apply to the use of metallic cable tray systems in other spaces used for environmental air (plenums), where accessible. Metal Cable Tray Systems. Metal cable tray systems shall be permitted to support the wiring methods specified in 300.22(C)(1).Solid Side and Bottom Metal Cable. Tray Systems. Solid side and bottom metal cable tray systems with solid metal covers shall be permitted to enclose wiring methods and cables not already covered in 300.22(C)(1) in accordance with 392.10(A) and (B). [300.22_(C)_(2)](https://2023.antflix.net#300.22_(C)_(2))", + "displayTitle": "(2) Cable Tray Systems", + "children": [], + "url": "https://2023.antflix.net#300.22_(C)_(2)" + }, + { + "body": "Electrical equipment with a metal enclosure, or electrical equipment with a nonmetallic enclosure listed for use within an air-handling space and having low smoke and heat release properties, and associated wiring material suitable for the ambient temperature shall be permitted to be installed in such other spaces unless prohibited elsewhere in this Code. Informational Note: See UL 2043, Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces, for one method of testing low smoke and heat release properties to determine that the equipment exhibits a maximum peak optical density of 0.50 or less, an average optical density of 0.15 or less, and a peak heat release rate of 100 kW or less. Exception: Integral fan systems shall be permitted where specifically identified for use within an air-handling space. [300.22_(C)_(3)](https://2023.antflix.net#300.22_(C)_(3))", + "displayTitle": "(3) Equipment", + "children": [], + "url": "https://2023.antflix.net#300.22_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#300.22_(C)" + }, + { + "body": "Where the installation complies with the special requirements specified in 645.4, electrical wiring in air-handling areas beneath raised floors for information technology equipment shall be permitted in accordance with 645.5(E). [300.22_(D)](https://2023.antflix.net#300.22_(D))", + "displayTitle": "(D) Information Technology Equipment", + "children": [], + "url": "https://2023.antflix.net#300.22_(D)" + } + ], + "url": "https://2023.antflix.net#300.22" + }, + { + "body": "Cables, raceways, and equipment installed behind panels designed to allow access, including suspended ceiling panels, shall be arranged and secured to allow the removal of panels and access to the equipment. [300.23](https://2023.antflix.net#300.23)", + "displayTitle": "300.23 Panels Designed to Allow Access", + "children": [], + "url": "https://2023.antflix.net#300.23" + }, + { + "body": "Where an exit enclosure is required to have a fire resistance rating, only electrical wiring methods serving equipment permitted by the authority having jurisdiction in the exit enclosure shall be installed within the exit enclosure. Exception: Where egress lighting is required on outside exterior doorways from the exit enclosure, luminaires shall be permitted to be supplied from the inside of the exit enclosure. Informational Note: See NFPA 101-2021, Life Safety Code, 7.1.3.2.1 (10)(b), for more information. [300.25](https://2023.antflix.net#300.25)", + "displayTitle": "300.25 Exit Enclosures (Stair Towers)", + "children": [], + "url": "https://2023.antflix.net#300.25" + }, + { + "body": "Remote-control and signaling circuits shall be classified as either power-limited or non-power-limited and comply with the following:Class 1 power-limited remote-control and signaling circuits shall comply with 724.3.Class 2 and Class 3 power-limited remote-control and signaling circuits shall comply with 725.3.Non-power-limited remote-control and signaling circuits shall be installed in accordance with 300.2 through 300.25. [300.26](https://2023.antflix.net#300.26)", + "displayTitle": "300.26 Remote-Control and Signaling Circuits Classification", + "children": [], + "url": "https://2023.antflix.net#300.26" + } + ], + "url": "https://2023.antflix.net#300" + }, + { + "displayTitle": "Article 305 General Requirements for Wiring Methods and Materials for Systems Rated Over 1000 Volts AC, 1500 Volts DC, Nominal", + "children": [ + { + "body": "This article covers wiring methods and materials for systems rated over 1000 volts ac, 1500 volts dc, nominal. [305.1](https://2023.antflix.net#305.1)", + "displayTitle": "305.1 Scope", + "children": [], + "url": "https://2023.antflix.net#305.1" + }, + { + "body": "Conductors shall be permitted to be installed in accordance with any of the wiring methods identified in Table 305.3. Exposed runs of Type MV cables, bare conductors, and bare busbars shall be permitted in locations accessible only to qualified persons. Busbars shall be permitted to be either copper or aluminum. Exception: Airfield lighting cable used in series circuits that are powered by regulators and installed in restricted airport lighting vaults shall be permitted as exposed cable installations. Informational Note: An example of a common application is FAA L-824 cables installed as exposed runs within a restricted vault area. Table 305.3 Wiring Methods Permitted for Use in Systems Rated Over 1000 Volts ac, 1500 Volts dc, Nominal Wiring Methods Permitted for Use Above 1000 Volts ac, 1500 Volts dc Voltage Levels Reference Pull and junction boxes, conduit bodies, and handhole enclosures Over 1000 Article 314, Part IV Metal-clad cable (Type MC) 1000\u201435,000 Article 330 Type P cable 1000\u20142000 Article 337 Intermediate metal conduit (IMC) Over 1000 Article 342 Rigid metal conduit (RMC) Over 1000 Article 344 Rigid polyvinyl chloride conduit (PVC) Over 1000 Article 352 Reinforced thermosetting resin conduit (RTRC) Over 1000 Article 355 Electrical metallic tubing (EMT) Over 1000 Article 358 Auxiliary gutters Over 1000 Article 366 Busway Over 1000 Article 368, Part IV Cablebus 1000\u201435,000 Article 370 Cable trays 1000\u201435,000 Article 392 Messenger-supported wiring 1000\u201435,000 Article 396 Outdoor overhead conductors Over 1000 Article 395 Insulated bus pipe (IBP) 1000\u201435,000 ac Article 369 [305.3](https://2023.antflix.net#305.3)", + "displayTitle": "305.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#305.3" + }, + { + "body": "Conductors of circuits rated over 1000 volts ac, 1500 volts dc, nominal, shall not occupy the same equipment wiring enclosure, cable, or raceway with conductors of circuits rated 1000 volts ac, 1500 volts dc, nominal, or less unless otherwise permitted as follows: Where contained within the individual wiring enclosure, primary leads of electric-discharge lamp ballasts insulated for the primary voltage of the ballast shall be permitted to occupy the same luminaire, sign, or outline lighting enclosure as the branch-circuit conductors.Excitation, control, relay, and ammeter conductors used in connection with any individual motor or starter shall be permitted to occupy the same enclosure as the motor-circuit conductors.Conductors of different voltage ratings shall be permitted in motors, transformers, switchgear, switchboards, control assemblies, and similar equipment.If the conductors of each system in a manhole are permanently and effectively separated from the conductors of the other systems and securely fastened to racks, insulators, or other approved supports, conductors of different voltage ratings shall be permitted.Conductors having nonshielded insulation and operating at different voltage levels shall not occupy the same enclosure, cable, or raceway. [305.4](https://2023.antflix.net#305.4)", + "displayTitle": "305.4 Conductors of Different Systems", + "children": [], + "url": "https://2023.antflix.net#305.4" + }, + { + "body": "The conductor shall not be bent to a radius less than 8 times the overall diameter for nonshielded conductors or 12 times the overall diameter for shielded or lead-covered conductors during or after installation. For multiconductor or multiplexed single-conductor cables having individually shielded conductors, the minimum bending radius shall be 12 times the diameter of the individually shielded conductors or 7 times the overall diameter, whichever is greater. [305.5](https://2023.antflix.net#305.5)", + "displayTitle": "305.5 Conductor Bending Radius", + "children": [], + "url": "https://2023.antflix.net#305.5" + }, + { + "body": "Metallic raceways and associated conductors shall be arranged to avoid heating of the raceway in accordance with 300.20. [305.6](https://2023.antflix.net#305.6)", + "displayTitle": "305.6 Protection Against Induction Heating", + "children": [], + "url": "https://2023.antflix.net#305.6" + }, + { + "body": "Suitable covers shall be installed on all boxes, fittings, and similar enclosures to prevent accidental contact with energized parts or physical damage to parts or insulation. [305.7](https://2023.antflix.net#305.7)", + "displayTitle": "305.7 Covers Required", + "children": [], + "url": "https://2023.antflix.net#305.7" + }, + { + "body": "Where raceways are installed in wet locations above grade, the interior of these raceways shall be considered to be a wet location. Insulated conductors and cables installed in raceways in wet locations above grade shall be either moisture-impervious metal-sheathed or of a type listed for use in wet locations. [305.8](https://2023.antflix.net#305.8)", + "displayTitle": "305.8 Raceways in Wet Locations Above Grade", + "children": [], + "url": "https://2023.antflix.net#305.8" + }, + { + "body": "Exposed runs of braid-covered insulated conductors shall have a flame-retardant braid. If the conductors used do not have this protection, a flame-retardant saturant shall be applied to the braid covering after installation. This treated braid covering shall be stripped back a safe distance at conductor terminals, according to the operating voltage. Where practicable, this distance shall not be less than 25 mm (1 in.) for each kilovolt of the conductor-to-ground voltage of the circuit. [305.9](https://2023.antflix.net#305.9)", + "displayTitle": "305.9 Braid-Covered Insulated Conductors - Exposed Installation", + "children": [], + "url": "https://2023.antflix.net#305.9" + }, + { + "body": "Metallic and semiconducting insulation shielding components of shielded cables shall be removed for a distance dependent on the circuit voltage and insulation. Stress reduction means shall be provided at all terminations of factory-applied shielding. Metallic shielding components such as tapes, wires, or braids, or combinations of them, shall be connected to an equipment grounding conductor, an equipment grounding busbar, or a grounding electrode. [305.10](https://2023.antflix.net#305.10)", + "displayTitle": "305.10 Insulation Shielding", + "children": [], + "url": "https://2023.antflix.net#305.10" + }, + { + "body": "Where cable conductors emerge from a metal sheath and where protection against moisture or physical damage is necessary, the insulation of the conductors shall be protected by a cable sheath terminating device. [305.11](https://2023.antflix.net#305.11)", + "displayTitle": "305.11 Moisture or Mechanical Protection for Metal-Sheathed Cables", + "children": [], + "url": "https://2023.antflix.net#305.11" + }, + { + "body": "Danger signs shall be conspicuously posted at points of access to conductors in all raceway systems and cable systems. The sign(s) shall meet the requirements in 110.21(B), shall be readily visible, and shall state the following: DANGER-HIGH VOLTAGE-KEEP OUT [305.12](https://2023.antflix.net#305.12)", + "displayTitle": "305.12 Danger Signs", + "children": [], + "url": "https://2023.antflix.net#305.12" + }, + { + "displayTitle": "305.15 Underground Installations", + "children": [ + { + "body": "Underground conductors shall be identified for the voltage and conditions under which they are installed. Conductors used for direct-burial applications shall be of a type identified for such use. Underground cables shall be installed in accordance with 305.15(A)(1), (A)(2), or (A)(3), and the installation shall meet the depth requirements of Table 305.15(A).\n\nTable 305.15(A) Minimum Cover Requirements Circuit Voltage General Conditions (not otherwise specified) Special Conditions (use if applicable) Column 1 Column 2 Column 3 Column 4 Column 5 Column 6 Direct-Buried Cables1 Electrical Metallic Tubing, RTRC, PVC, and HDPE Conduit2 Rigid Metal Conduit and Intermediate Metal Conduit Raceways Under Buildings or Exterior Concrete Slabs, 100 mm (4 in.) Minimum Thickness3 Cables in Airport Runways or Adjacent Areas Where Trespass Is Prohibited Areas Subject to Vehicular Traffic, Such as Thoroughfares and Commercial Parking Areas mm in. mm in. mm in. mm in. mm in. mm in. Over 1000 V ac, 1500 V dc, through 22 kV 750 30 450 18 150 6 100 4 450 18 600 24 Over 22 kV through 40 kV 900 36 600 24 150 6 100 4 450 18 600 24 Over 40 kV 1000 42 750 30 150 6 100 4 450 18 600 24 Notes:Cover shall be defined as the shortest distance in millimeters (inches) measured between a point on the top surface of any direct-buried conductor, cable, conduit, or other raceway and the top surface of finished grade, concrete, or similar cover.Lesser depths shall be permitted where cables and conductors rise for terminations or splices or where access is otherwise required.Where solid rock prevents compliance with the cover depths specified in this table, the wiring shall be installed in a metal or nonmetallic raceway permitted for direct burial. The raceways shall be covered by a minimum of 50 mm (2 in.) of concrete extending down to rock.In industrial establishments, where conditions of maintenance and supervision ensure that qualified persons will service the installation, the minimum cover requirements for other than rigid metal conduit and intermediate metal conduit shall be permitted to be reduced 150 mm (6 in.) for each 50 mm (2 in.) of concrete or equivalent placed entirely within the trench over the underground installation.1Underground direct-buried cables that are not encased or protected by concrete and are buried 750 mm (30 in.) or more below grade shall have their location identified by a warning ribbon that is placed in the trench at least 300 mm (12 in.) above the cables.2Listed by a qualified testing agency as suitable for direct burial without encasement. All other nonmetallic systems shall require 50 mm (2 in.) of concrete or equivalent above conduit in addition to the table depth.3The slab shall extend a minimum of 150 mm (6 in.) beyond the underground installation, and a warning ribbon or other effective means suitable for the conditions shall be placed above the underground installation. [305.15_(A)](https://2023.antflix.net#305.15_(A))", + "displayTitle": "(A) General", + "children": [ + { + "body": "Underground cables, including nonshielded, Type MC and moisture-impervious metal sheath cables, shall have those sheaths grounded through an effective grounding path meeting the requirements of 250.4(A)(5) or 250.4(B)(4). They shall be direct buried or installed in raceways identified for the use. [305.15_(A)_(1)](https://2023.antflix.net#305.15_(A)_(1))", + "displayTitle": "(1) Shielded Cables and Nonshielded Cables in Metal-Sheathed Cable Assemblies", + "children": [], + "url": "https://2023.antflix.net#305.15_(A)_(1)" + }, + { + "body": "In industrial establishments, where conditions of maintenance and supervision ensure that only qualified persons service the installed cable, nonshielded single-conductor cables with insulation types up to 2000 volts that are listed for direct burial shall be permitted to be directly buried. [305.15_(A)_(2)](https://2023.antflix.net#305.15_(A)_(2))", + "displayTitle": "(2) Industrial Establishments", + "children": [], + "url": "https://2023.antflix.net#305.15_(A)_(2)" + }, + { + "body": "Other nonshielded cables not covered in 305.15(A)(1) or (A)(2) shall be installed in rigid metal conduit, intermediate metal conduit, or rigid nonmetallic conduit encased in not less than 75 mm (3 in.) of concrete. [305.15_(A)_(3)](https://2023.antflix.net#305.15_(A)_(3))", + "displayTitle": "(3) Other Nonshielded Cables", + "children": [], + "url": "https://2023.antflix.net#305.15_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#305.15_(A)" + }, + { + "body": "The interior of enclosures or raceways installed underground shall be considered to be a wet location. Insulated conductors and cables installed in these enclosures or raceways in underground installations shall be listed for use in wet locations and shall be either moisture-impervious metal-sheathed or of a type listed for use in wet locations. Any connections or splices in an underground installation shall be approved for wet locations. [305.15_(B)](https://2023.antflix.net#305.15_(B))", + "displayTitle": "(B) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#305.15_(B)" + }, + { + "body": "Conductors emerging from the ground shall be enclosed in listed raceways. Raceways installed on poles shall be of rigid metal conduit, intermediate metal conduit, RTRC-XW, Schedule 80 PVC conduit, or equivalent, extending from the minimum cover depth specified in Table 305.15(A) to a point 2.5 m (8 ft) above finished grade. Conductors entering a building shall be protected by an approved enclosure or raceway from the minimum cover depth to the point of entrance. Where direct-buried conductors, raceways, or cables are subject to movement by settlement or frost, they shall be installed to prevent damage to the enclosed conductors or to the equipment connected to the raceways. Metallic enclosures shall be grounded. [305.15_(C)](https://2023.antflix.net#305.15_(C))", + "displayTitle": "(C) Protection From Damage", + "children": [], + "url": "https://2023.antflix.net#305.15_(C)" + }, + { + "body": "Direct burial cables shall be permitted to be spliced or tapped without the use of splice boxes if they are installed using materials suitable for the application. The taps and splices shall be watertight and protected from mechanical damage. Where cables are shielded, the shielding shall be continuous across the splice or tap. Exception: At splices of an engineered cabling system, metallic shields of direct-buried single-conductor cables with maintained spacing between phases shall be permitted to be interrupted and overlapped. Where shields are interrupted and overlapped, each shield section shall be grounded at one point. [305.15_(D)](https://2023.antflix.net#305.15_(D))", + "displayTitle": "(D) Splices", + "children": [], + "url": "https://2023.antflix.net#305.15_(D)" + }, + { + "body": "Backfill containing large rocks, paving materials, cinders, large or sharply angular substances, or corrosive materials shall not be placed in an excavation where materials can damage or contribute to the corrosion of raceways, cables, or other substructures or where it might prevent adequate compaction of fill. Protection in the form of granular or selected material or suitable sleeves shall be provided to prevent physical damage to the raceway or cable. [305.15_(E)](https://2023.antflix.net#305.15_(E))", + "displayTitle": "(E) Backfill", + "children": [], + "url": "https://2023.antflix.net#305.15_(E)" + }, + { + "body": "Where a raceway enters from an underground system, the end within the building shall be sealed with an identified compound to prevent the entrance of moisture. Informational Note: Presence of hazardous gases or vapors might also necessitate sealing of underground conduits or raceways entering buildings. [305.15_(F)](https://2023.antflix.net#305.15_(F))", + "displayTitle": "(F) Raceway Seal", + "children": [], + "url": "https://2023.antflix.net#305.15_(F)" + } + ], + "url": "https://2023.antflix.net#305.15" + } + ], + "url": "https://2023.antflix.net#305" + }, + { + "displayTitle": "Article 310 Conductors for General Wiring", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_9_I" + }, + { + "body": "This article covers general requirements for conductors rated up to and including 2000 volts and their type designations, insulations, markings, mechanical strengths, ampacity ratings, and uses. These requirements do not apply to conductors that form an integral part of equipment, such as motors, motor controllers, and similar equipment, or to conductors specifically provided for elsewhere in this Code. [310.1](https://2023.antflix.net#310.1)", + "displayTitle": "310.1 Scope", + "children": [], + "url": "https://2023.antflix.net#310.1" + }, + { + "displayTitle": "310.3 Conductors", + "children": [ + { + "body": "The minimum size of conductors for voltage ratings up to and including 2000 volts shall be 14 AWG copper or 12 AWG aluminum or copper-clad aluminum, except as permitted elsewhere in this Code. [310.3_(A)](https://2023.antflix.net#310.3_(A))", + "displayTitle": "(A) Minimum Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#310.3_(A)" + }, + { + "body": "Conductors in this article shall be of copper, aluminum, or copper-clad aluminum, unless otherwise specified. Aluminum and copper-clad aluminum shall comply with the following: Solid aluminum conductors 8, 10, and 12 AWG shall be made of an AA-8000 series electrical grade aluminum alloy conductor material.Stranded aluminum conductors 8 AWG through 1000 kcmil marked as Type RHH. RHW, XHHW, XHHN, XHWN, THW, THHW, THWN, THHN, service-entrance Type SE Style U, and SE Style R shall be made of an AA-8000 series electrical grade aluminum alloy conductor material.For copper-clad aluminum conductors, the copper shall form a minimum 10 percent of the cross-sectional area of a solid conductor or each strand of a stranded conductor. The aluminum core of a copper-clad aluminum conductor shall be made of an AA-8000 series electrical grade aluminum alloy conductor material.Copper-clad aluminum conductor material shall be listed. [310.3_(B)](https://2023.antflix.net#310.3_(B))", + "displayTitle": "(B) Conductor Material", + "children": [], + "url": "https://2023.antflix.net#310.3_(B)" + }, + { + "body": "Where installed in raceways, conductors 8 AWG and larger shall be stranded, unless specifically permitted or required elsewhere in this Code to be solid. [310.3_(C)](https://2023.antflix.net#310.3_(C))", + "displayTitle": "(C) Stranded Conductors", + "children": [], + "url": "https://2023.antflix.net#310.3_(C)" + }, + { + "body": "Conductors not specifically permitted elsewhere in this Code to be covered or bare shall be insulated. Informational Note: See 250.184 for insulation of neutral conductors of a solidly grounded high-voltage system. [310.3_(D)](https://2023.antflix.net#310.3_(D))", + "displayTitle": "(D) Insulated", + "children": [], + "url": "https://2023.antflix.net#310.3_(D)" + } + ], + "url": "https://2023.antflix.net#310.3" + }, + { + "displayTitle": "Part II Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_9_II" + }, + { + "body": "Insulated conductors shall comply with Table 310.4(1) and Table 310.4(2). Informational Note: Thermoplastic insulation may stiffen at temperatures lower than \u201410\u00b0C (+14\u00b0F). Thermoplastic insulation may also be deformed at normal temperatures where subjected to pressure, such as at points of support. Table 310.4(1) Conductor Applications and Insulations Rated 600 Volts Trade Name Type Letter Maximum Operating Temperature Application Provisions Insulation Thickness of Insulation Outer Covering1 AWG or kcmil mm mils Fluorinated ethylene propylene FEP or FEPB 90\u00b0C(194\u00b0F) Dry and damp locations Fluorinated ethylene propylene 14\u201410 0.51 20 None 8\u20142 0.76 30 200\u00b0C(392\u00b0F) Dry locations - special applications2 Fluorinated ethylene propylene 14\u20148 0.36 14 Glass braid 6\u20142 0.36 14 Glass or other suitable braid material Mineral insulation (metal sheathed) MI 90\u00b0C(194\u00b0F) Dry and wet locations Magnesium oxide 18\u2014163 0.58 23 Copper or alloy steel 16\u201410 0.91 36 250\u00b0C(482\u00b0F) For special applications2 9\u20144 1.27 50 3\u2014500 1.40 55 Moisture-, heat-, and oil-resistant thermoplastic MTW 60\u00b0C(140\u00b0F) Machine tool wiring in wet locations Flame-retardant, moisture-, heat-, and oil-resistant thermoplastic (A) (B) (A) (B) (A) None (B) Nylon jacket or equivalent 90\u00b0C(194\u00b0F) Machine tool wiring in dry locations. 22\u201412 0.76 0.38 30 15 10 0.76 0.51 30 20 8 1.14 0.76 45 30 Informational Note: See NFPA 79-2021.Electrical Standard for Industrial Machinery. 6 1.52 0.76 60 30 4\u20142 1.52 1.02 60 40 1\u20144/0 2.03 1.27 80 50 213\u2014500 2.41 1.52 95 60 501\u20141000 2.79 1.78 110 70 Paper 85\u00b0C(185\u00b0F) For underground service conductors, or by special permission Paper Lead sheath Perfluoro-alkoxy PFA 90\u00b0C(194\u00b0F) Dry and damp locations Perfluoro-alkoxy 14\u201410 0.51 20 None 8\u20142 0.76 30 200\u00b0C(392\u00b0F) Dry locations - special applications2 1\u20144/0 1.14 45 Perfluoro-alkoxy PFAH 250\u00b0C(482\u00b0F) Dry locations only. Only for leads within apparatus or within raceways connected to apparatus (nickel or nickel-coated copper only) Perfluoro-alkoxy 14\u201410 0.51 20 None 8\u20142 0.76 30 1\u20144/0 1.14 45 Thermoset RHH 90\u00b0C(194\u00b0F) Dry and damp locations 14\u201410 1.14 45 Moisture-resistant, flame-retardant, nonmetallic covering1 8\u20142 1.52 60 1\u20144/0 2.03 80 213\u2014500 2.41 95 501\u20141000 2.79 110 1001\u20142000 3.18 125 Moisture-resistant thermoset RHW 75\u00b0C(167\u00b0F) Dry and wet locations Flame-retardant, moisture-resistant thermoset 14\u201410 1.14 45 Moisture-resistant, flame-retardant, nonmetallic covering 8\u20142 1.52 60 1\u20144/0 2.03 80 RHW-2 90\u00b0C(194\u00b0F) 213\u2014500 2.41 95 501\u20141000 2.79 110 1001\u20142000 3.18 125 Silicone SA 90\u00b0C(194\u00b0F) Dry and damp locations Silicone rubber 14\u201410 1.14 45 Glass or other suitable braid material 8\u20142 1.52 60 1\u20144/0 2.03 80 200\u00b0C(392\u00b0F) For special application2 213\u2014500 2.41 95 501\u20141000 2.79 110 1001\u20142000 3.18 125 Thermoset SIS 90\u00b0C (194\u00b0F) Switchboard and switchgear wiring only Flame-retardant thermoset 14\u201410 0.76 30 None 8\u20142 1.14 45 1\u20144/0 1.40 55 Thermoplastic and fibrous outer braid TBS 90\u00b0C (194\u00b0F) Switchboard and switchgear wiring only Thermoplastic 14\u201410 0.76 30 Flame-retardant, nonmetallic covering 8 1.14 45 6\u20142 1.52 60 1\u20144/0 2.03 80 Extended polytetra-fluoro-ethylene TFE 250\u00b0C (482\u00b0F) Dry locations only. Only for leads within apparatus or within raceways connected to apparatus, or as open wiring (nickel or nickel-coated copper only) Extruded polytetra-fluoroethylene 14\u201410 0.51 20 None 8\u20142 0.76 30 1\u20144/0 1.14 45 Heat-resistant thermoplastic THHN 90\u00b0C (194\u00b0F) Dry and damp locations Flame-retardant, heat-resistant thermoplastic 14\u201412 0.38 15 Nylon jacket or equivalent 10 0.51 20 8\u20146 0.76 30 4\u20142 1.02 40 1\u20144/0 1.27 50 250\u2014500 1.52 60 501\u20141000 1.78 70 Moisture- and heat-resistant thermoplastic THHW 75\u00b0C (167\u00b0F) Wet location Flame-retardant, moisture- and heat-resistant thermoplastic 14\u201410 0.76 30 None 8 1.14 45 6\u20142 1.52 60 90\u00b0C (194\u00b0F) Dry location 1\u20144/0 2.03 80 213\u2014500 2.41 95 501\u20141000 2.79 110 1001\u20142000 3.18 125 Moisture- and heat-resistant thermoplastic THW 75\u00b0C (167\u00b0F) Dry and wet locations Flame-retardant, moisture- and heat-resistant thermoplastic 14\u201410 0.76 30 None 8 1.14 45 90\u00b0C (194\u00b0F) Special applications within electric discharge lighting equipment. Limited to 1000 open-circuit volts or less. (Size 14\u20148 only as permitted in 410.68.) 6\u20142 1.52 60 1\u20144/0 2.03 80 213\u2014500 2.41 95 501\u20141000 2.79 110 1001\u20142000 3.18 125 THW-2 90\u00b0C (194\u00b0F) Dry and wet locations Moisture- and heat-resistant thermoplastic THWN 75\u00b0C (167\u00b0F) Dry and wet locations Flame-retardant, moisture- and heat-resistant thermoplastic 14\u201412 0.38 15 Nylon jacket or equivalent 10 0.51 20 8\u20146 0.76 30 4\u20142 1.02 40 THWN-2 90\u00b0C (194\u00b0F) 1\u20144/0 1.27 50 250\u2014500 1.52 60 501\u20141000 1.78 70 Moisture-resistant thermoplastic TW 60\u00b0C (140\u00b0F) Dry and wet locations Flame-retardant, moisture-resistant thermoplastic 14\u201410 0.76 30 None 8 1.14 45 6\u20142 1.52 60 1\u20144/0 2.03 80 213\u2014500 2.41 95 501\u20141000 2.79 110 1001\u20142000 3.18 125 Underground feeder and branch-circuit cable - single conductor (for Type UF cable employing more than one conductor, see Part II of Article 340). UF 60\u00b0C 140\u00b0C See Part II of Article 340. Moisture-resistant 14\u201410 1.52 605 Integral with insulation 8\u20142 2.03 805 75\u00b0C (167\u00b0F)4 Moisture- and heat-resistant 1\u20144/0 2.41 955 Underground service-entrance cable - single conductor (for Type USE cable employing more than one conductor, see Part II of Article 338). USE 75\u00b0C(167\u00b0F)4 See Part II of Article 338. Heat- and moisture-resistant 14\u201410 1.14 45 Moisture-resistant nonmetallic covering (See 338.2.) 8\u20142 1.52 60 USE-2 90\u00b0C(194\u00b0F) Dry and wet locations 1\u20144/0 2.03 80 213\u2014500 2.41 956 501\u20141000 2.79 110 1001\u20142000 3.18 125 Thermoset XHH 90\u00b0C(194\u00b0F) Dry and damp locations Flame-retardant thermoset 14\u201410 0.76 30 None 8\u20142 1.14 45 1\u20144/0 1.40 55 213\u2014500 1.65 65 501\u20141000 2.03 80 1001\u20142000 2.41 95 Thermoset XHHN 90\u00b0C(194\u00b0F) Dry and damp locations Flame-retardant thermoset 14\u201412 0.38 15 Nylon jacket or equivalent 10 0.51 20 8\u20146 0.76 30 4\u20142 1.02 40 1\u20144/0 1.27 50 250\u2014500 1.52 60 501\u20141000 1.78 70 Moisture-resistant thermoset XHHW 90\u00b0C(194\u00b0F) Dry and damp locations Flame-retardant, moisture-resistant thermoset 14\u201410 0.76 30 None 8\u20142 1.14 45 75\u00b0C(167\u00b0F) Wet locations 1\u20144/0 1.40 55 213\u2014500 1.65 65 501\u20141000 2.03 80 1001\u20142000 2.41 95 Moisture-resistant thermoset XHHW-2 90\u00b0C(194\u00b0F) Dry and wet locations Flame-retardant, moisture-resistant thermoset 14\u201410 0.76 30 None 8\u20142 1.14 45 1\u20144/0 1.40 55 213\u2014500 1.65 65 501\u20141000 2.03 80 1001\u20142000 2.41 95 Moisture-resistant thermoset XHWN 75\u00b0C(167\u00b0F) Dry and wet locations Flame-retardant, moisture-resistant thermoset 14\u201412 0.38 15 Nylon jacket or equivalent 10 0.51 20 8\u20146 0.76 30 XHWN-2 90\u00b0C(194\u00b0F) 4\u20142 1.02 40 1\u20144/0 1.27 50 250\u2014500 1.52 60 501\u20141000 1.78 70 Modified ethylene tetrafluoro-ethylene Z 90\u00b0C(194\u00b0F) Dry and damp locations Modified ethylene tetrafluoro-ethylene 14\u201412 0.38 15 None 10 0.51 20 150\u00b0C(302\u00b0F) Dry locations - special applications2 8\u20144 0.64 25 3\u20141 0.89 35 1/0\u20144/0 1.14 45 Modified ethylene tetrafluoro-ethylene ZW 75\u00b0C(167\u00b0F) Wet locations Modified ethylene tetrafluoro-ethylene 14\u201410 0.76 30 None 8\u20142 1.14 45 90\u00b0C(194\u00b0F) Dry and damp locations 150\u00b0C(302\u00b0F) Dry locations - special applications2 ZW-2 90\u00b0C(194\u00b0F) Dry and wet locations Note: Conductors in Table 310.4(1) shall be permitted to be rated up to 1000 volts if listed and marked. 1Outer coverings shall not be required where listed without a covering. 2Higher temperature rated constructions shall be permitted where design conditions require maximum conductor operating temperatures above 90\u00b0C (194\u00b0F). 3Conductor sizes shall be permitted for signaling circuits permitting 300-volt insulation. 4The ampacity of Type UF cable shall be limited in accordance with 340.80. 5Type UF insulation thickness shall include the integral jacket. 6Insulation thickness shall be permitted to be 2.03 mm (80 mils) for listed Type USE conductors that have been subjected to special investigations. The nonmetallic covering over individual rubber-covered conductors of aluminum-sheathed cable and of lead-sheathed or multiconductor cable shall not be required to be flame retardant. Table 310.4(2) Thickness of Insulation for Nonshielded Types RHH and RHW Solid Dielectric Insulated Conductors Rated 2000 Volts Conductor Size(AWG or kcmil) Column A1 Column B2 mm mils mm mils 14\u201410 2.03 80 1.52 60 8 2.03 80 1.78 70 6\u20142 2.41 95 1.78 70 1\u20142/0 2.79 110 2.29 90 3/0\u20144/0 2.79 110 2.29 90 213\u2014500 3.18 125 2.67 105 501\u20141000 3.56 140 3.05 120 1001\u20142000 3.56 140 3.56 140 1Column A insulations shall be limited to natural, SBR, and butyl rubbers. 2Column B insulations shall be materials such as cross-linked polyethylene, ethylene propylene rubber, and composites thereof. [310.4](https://2023.antflix.net#310.4)", + "displayTitle": "310.4 Conductor Constructions and Applications", + "children": [], + "url": "https://2023.antflix.net#310.4" + }, + { + "displayTitle": "310.6 Conductor Identification", + "children": [ + { + "body": "Insulated or covered grounded conductors shall be identified in accordance with 200.6. [310.6_(A)](https://2023.antflix.net#310.6_(A))", + "displayTitle": "(A) Grounded Conductors", + "children": [], + "url": "https://2023.antflix.net#310.6_(A)" + }, + { + "body": "Equipment grounding conductors shall be identified in accordance with 250.119. [310.6_(B)](https://2023.antflix.net#310.6_(B))", + "displayTitle": "(B) Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#310.6_(B)" + }, + { + "body": "Conductors that are intended for use as ungrounded conductors, whether used as a single conductor or in multiconductor cables, shall be finished to be clearly distinguishable from grounded conductors and equipment grounding conductors. Distinguishing markings shall not conflict in any manner with the surface markings required by 310.8(B)(1). Branch-circuit ungrounded conductors shall be identified in accordance with 210.5(C). Feeders shall be identified in accordance with 215.12(C) Exception: Conductor identification shall be permitted in accordance with 200.7. [310.6_(C)](https://2023.antflix.net#310.6_(C))", + "displayTitle": "(C) Ungrounded Conductors", + "children": [], + "url": "https://2023.antflix.net#310.6_(C)" + } + ], + "url": "https://2023.antflix.net#310.6" + }, + { + "displayTitle": "310.8 Marking", + "children": [ + { + "body": "All conductors and cables shall be marked to indicate the following information, using the applicable method described in 310.8(B): The maximum rated voltage.The proper type letter or letters for the type of wire or cable as specified elsewhere in this Code.The manufacturer's name, trademark, or other distinctive marking by which the organization responsible for the product can be readily identified.The AWG size or circular mil area.Informational Note: See Chapter 9, Table 8, Conductor Properties, for conductor area expressed in SI units for conductor sizes specified in AWG or circular mil area.Cable assemblies where the neutral conductor is smaller than the ungrounded conductors shall be so marked. [310.8_(A)](https://2023.antflix.net#310.8_(A))", + "displayTitle": "(A) Required Information", + "children": [], + "url": "https://2023.antflix.net#310.8_(A)" + }, + { + "displayTitle": "(B) Method of Marking", + "children": [ + { + "body": "The following conductors and cables shall be durably marked on the surface: Single-conductor and multiconductor thermoset and thermoplastic-insulated wire and cableNonmetallic-sheathed cableService-entrance cableUnderground feeder and branch-circuit cableTray cableIrrigation cablePower-limited tray cableInstrumentation tray cableThe AWG size or circular mil area shall be repeated at intervals not exceeding 610 mm (24 in.). All other markings shall be repeated at intervals not exceeding 1.0 m (40 in.). [310.8_(B)_(1)](https://2023.antflix.net#310.8_(B)_(1))", + "displayTitle": "(1) Surface Marking", + "children": [], + "url": "https://2023.antflix.net#310.8_(B)_(1)" + }, + { + "body": "Metal-covered multiconductor cables shall employ a marker tape located within the cable and running for its complete length. Exception No. 1: Type MI cable shall not require a marker tape. Exception No. 2: Type AC cable shall not require a marker tape. Exception No. 3: The information required in 310.8(A) shall be permitted to be durably marked on the outer nonmetallic covering of Type MC, Type ITC, or Type PLTC cables at intervals not exceeding 1.0 m (40 in.). Exception No. 4: The information required in 310.8(A) shall be permitted to be durably marked on a nonmetallic covering under the metallic sheath of Type EEC or Type PLTC cable at intervals not exceeding 1.0 m (40 in.). Informational Note: Included in the group of metal-covered cables are Type AC cable, Type MC cable, and lead-sheathed cable. [310.8_(B)_(2)](https://2023.antflix.net#310.8_(B)_(2))", + "displayTitle": "(2) Marker Tape", + "children": [], + "url": "https://2023.antflix.net#310.8_(B)_(2)" + }, + { + "body": "The following conductors and cables shall be marked by means of a printed tag attached to the coil, reel, or carton: Type MI cableSwitchboard wiresMetal-covered, single-conductor cablesType AC cable [310.8_(B)_(3)](https://2023.antflix.net#310.8_(B)_(3))", + "displayTitle": "(3) Tag Marking", + "children": [], + "url": "https://2023.antflix.net#310.8_(B)_(3)" + }, + { + "body": "The information required in 310.8(A)(4) shall be permitted to be marked on the surface of the individual insulated conductors for the following multiconductor cables: Type MC cableTray cableIrrigation cablePower-limited tray cablePower-limited fire alarm cableInstrumentation tray cable [310.8_(B)_(4)](https://2023.antflix.net#310.8_(B)_(4))", + "displayTitle": "(4) Optional Marking of Wire Size", + "children": [], + "url": "https://2023.antflix.net#310.8_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#310.8_(B)" + }, + { + "body": "A type letter or letters used alone shall indicate a single insulated conductor. The letter suffixes shall be indicated as follows: D - For two insulated conductors laid parallel within an outer nonmetallic coveringM - For an assembly of two or more insulated conductors twisted spirally within an outer nonmetallic covering [310.8_(C)](https://2023.antflix.net#310.8_(C))", + "displayTitle": "(C) Suffixes to Designate Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#310.8_(C)" + }, + { + "body": "All conductors and cables contained in Chapter 3 shall be permitted to be surface marked to indicate special characteristics of the cable materials. These markings include, but are not limited to, markings for limited smoke, sunlight resistant, and so forth. [310.8_(D)](https://2023.antflix.net#310.8_(D))", + "displayTitle": "(D) Optional Markings", + "children": [], + "url": "https://2023.antflix.net#310.8_(D)" + } + ], + "url": "https://2023.antflix.net#310.8" + }, + { + "displayTitle": "Part III Installation", + "children": [], + "url": "https://2023.antflix.net#divider_8_III" + }, + { + "body": "The conductors described in 310.4 shall be permitted for use in any of the wiring methods covered in Chapter 3 and as specified in their respective tables or as permitted elsewhere in this Code. [310.10](https://2023.antflix.net#310.10)", + "displayTitle": "310.10 Uses Permitted", + "children": [ + { + "body": "Insulated conductors and cables used in dry locations shall be any of the types identified in this Code. [310.10_(A)](https://2023.antflix.net#310.10_(A))", + "displayTitle": "(A) Dry Locations", + "children": [], + "url": "https://2023.antflix.net#310.10_(A)" + }, + { + "body": "Insulated conductors and cables used in dry and damp locations shall be Types FEP, FEPB, MTW, PFA, RHH, RHW, RHW-2, SA, THHN, THW, THW-2, THHW, THWN, THWN-2, TW, XHH, XHHW, XHHW-2, XHHN, XHWN, XHWN-2, Z, or ZW. [310.10_(B)](https://2023.antflix.net#310.10_(B))", + "displayTitle": "(B) Dry and Damp Locations", + "children": [], + "url": "https://2023.antflix.net#310.10_(B)" + }, + { + "body": "Insulated conductors and cables used in wet locations shall comply with one of the following: Be moisture-impervious metal-sheathedBe types MTW, RHW, RHW-2, TW, THW, THW-2, THHW, THWN, THWN-2, XHHW, XHHW-2, XHWN, XHWN-2 or ZWBe of a type listed for use in wet locations [310.10_(C)](https://2023.antflix.net#310.10_(C))", + "displayTitle": "(C) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#310.10_(C)" + }, + { + "body": "Insulated conductors or cables used where exposed to direct rays of the sun shall comply with one of the following: Conductors and cables shall be listed being sunlight resistant.Conductors and cables shall be covered with insulating material, such as tape or sleeving, that is listed as being sunlight resistant. [310.10_(D)](https://2023.antflix.net#310.10_(D))", + "displayTitle": "(D) Locations Exposed to Direct Sunlight", + "children": [], + "url": "https://2023.antflix.net#310.10_(D)" + }, + { + "body": "Conductors used for direct-burial applications shall be of a type identified for such use. [310.10_(E)](https://2023.antflix.net#310.10_(E))", + "displayTitle": "(E) Direct-Burial Conductors", + "children": [], + "url": "https://2023.antflix.net#310.10_(E)" + }, + { + "body": "Conductors exposed to oils, greases, vapors, gases, fumes, liquids, or other substances having a deleterious effect on the conductor or insulation shall be of a type suitable for the application. [310.10_(F)](https://2023.antflix.net#310.10_(F))", + "displayTitle": "(F) Corrosive Conditions", + "children": [], + "url": "https://2023.antflix.net#310.10_(F)" + }, + { + "displayTitle": "(G) Conductors in Parallel", + "children": [ + { + "body": "Aluminum, copper-clad aluminum, or copper circuit conductors for each ungrounded conductor, grounded conductor, or neutral conductor shall be permitted to be connected in parallel (electrically joined at both ends) only in sizes 1/0 AWG and larger and shall be installed in accordance with 310.10(G)(2) through (G)(4). Exception No. 1: Conductors in sizes smaller than 1/0 AWG shall be permitted to be run in parallel to supply control power to indicating instruments, contactors, relays, solenoids, and similar control devices, or for frequencies of 360 Hz and higher, provided all of the following apply: (1) They are contained within the same raceway or cable. (2) The ampacity of each individual conductor is sufficient to carry the entire load current shared by the parallel conductors. (3) The overcurrent protection is such that the ampacity of each individual conductor will not be exceeded if one or more of the parallel conductors become inadvertently disconnected. Exception No. 2: Under engineering supervision, 2 AWG and 1 AWG grounded neutral conductors shall be permitted to be installed in parallel for existing installations. Informational Note: Exception No. 2 can be used to alleviate overheating of neutral conductors in existing installations due to high content of triplen harmonic currents. [310.10_(G)_(1)](https://2023.antflix.net#310.10_(G)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#310.10_(G)_(1)" + }, + { + "body": "The paralleled conductors that comprise each ungrounded conductor, grounded conductor, neutral conductor, equipment grounding conductor, equipment bonding jumper, or supply-side bonding jumper shall comply with all of the following: Be the same lengthConsist of the same conductor materialBe the same size in circular mil areaHave the same insulation typeBe terminated in the same manner [310.10_(G)_(2)](https://2023.antflix.net#310.10_(G)_(2))", + "displayTitle": "(2) Conductor and Installation Characteristics", + "children": [], + "url": "https://2023.antflix.net#310.10_(G)_(2)" + }, + { + "body": "Where run in separate cables or raceways, the cables or raceways with conductors shall have the same number of conductors and shall have the same electrical characteristics. Conductors composing one paralleled set shall not be required to have the same physical characteristics as those of another paralleled set. [310.10_(G)_(3)](https://2023.antflix.net#310.10_(G)_(3))", + "displayTitle": "(3) Separate Cables or Raceways", + "children": [], + "url": "https://2023.antflix.net#310.10_(G)_(3)" + }, + { + "body": "Conductors installed in parallel shall comply with 310.15(B) and (C). [310.10_(G)_(4)](https://2023.antflix.net#310.10_(G)_(4))", + "displayTitle": "(4) Ampacity Correction or Adjustment", + "children": [], + "url": "https://2023.antflix.net#310.10_(G)_(4)" + }, + { + "body": "Where parallel equipment grounding conductors are used, they shall be sized in accordance with 250.122. Sectioned equipment grounding conductors smaller than 1/0 AWG shall be permitted in multiconductor cables, if the combined circular mil area of the sectioned equipment grounding conductors in each cable complies with 250.122. [310.10_(G)_(5)](https://2023.antflix.net#310.10_(G)_(5))", + "displayTitle": "(5) Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#310.10_(G)_(5)" + }, + { + "body": "Where parallel equipment bonding jumpers or supply-side bonding jumpers are installed in raceways, they shall be sized and installed in accordance with 250.102. [310.10_(G)_(6)](https://2023.antflix.net#310.10_(G)_(6))", + "displayTitle": "(6) Bonding Jumpers", + "children": [], + "url": "https://2023.antflix.net#310.10_(G)_(6)" + } + ], + "url": "https://2023.antflix.net#310.10_(G)" + } + ], + "url": "https://2023.antflix.net#310.10" + }, + { + "body": "For one-family dwellings and the individual dwelling units of two-family and multifamily dwellings, service and feeder conductors supplied by a single-phase, 120/240-volt system shall be permitted to be sized in accordance with 310.12(A) through (D). For one-family dwellings and the individual dwelling units of two-family and multifamily dwellings, single-phase feeder conductors consisting of two ungrounded conductors and the neutral conductor from a 208Y/120 volt system shall be permitted to be sized in accordance with 310.12(A) through (C). [310.12](https://2023.antflix.net#310.12)", + "displayTitle": "310.12 Single-Phase Dwelling Services and Feeders", + "children": [ + { + "body": "For a service rated 100 amperes through 400 amperes, the service conductors supplying the entire load associated with a one-family dwelling, or the service conductors supplying the entire load associated with an individual dwelling unit in a two-family or multifamily dwelling, shall be permitted to have an ampacity not less than 83 percent of the service rating. If no adjustment or correction factors are required, Table 310.12(A) shall be permitted to be applied.Table 310.12(A) Single-Phase Dwelling Services and Feeders Service or Feeder Rating (Amperes) Conductor (AWG or kcmil) Copper Aluminum or Copper-Clad Aluminum 100 4 2 110 3 1 125 2 1/0 150 1 2/0 175 1/0 3/0 200 2/0 4/0 225 3/0 250 250 4/0 300 300 250 350 350 350 500 400 400 600 Note: If no adjustment or correction factors are required, this table shall be permitted to be applied. [310.12_(A)](https://2023.antflix.net#310.12_(A))", + "displayTitle": "(A) Services", + "children": [], + "url": "https://2023.antflix.net#310.12_(A)" + }, + { + "body": "For a feeder rated 100 amperes through 400 amperes, the feeder conductors supplying the entire load associated with a one-family dwelling, or the feeder conductors supplying the entire load associated with an individual dwelling unit in a two-family or multifamily dwelling, shall be permitted to have an ampacity not less than 83 percent of the feeder rating. If no adjustment or correction factors are required, Table 310.12(A) shall be permitted to be applied. [310.12_(B)](https://2023.antflix.net#310.12_(B))", + "displayTitle": "(B) Feeders", + "children": [], + "url": "https://2023.antflix.net#310.12_(B)" + }, + { + "body": "In no case shall a feeder for an individual dwelling unit be required to have an ampacity greater than that specified in 310.12(A) or (B). [310.12_(C)](https://2023.antflix.net#310.12_(C))", + "displayTitle": "(C) Feeder Ampacities", + "children": [], + "url": "https://2023.antflix.net#310.12_(C)" + }, + { + "body": "Grounded conductors shall be permitted to be sized smaller than the ungrounded conductors, if the requirements of 220.61 and 230.42 for service conductors or the requirements of 215.2 and 220.61 for feeder conductors are met. Where correction or adjustment factors are required by 310.15(B) or (C), they shall be permitted to be applied to the ampacity associated with the temperature rating of the conductor. Informational Note No. 1: See 240.6(A) for standard ampere ratings for fuses and inverse time circuit breakers. Informational Note No. 2: See Informative Annex D, Example D7. [310.12_(D)](https://2023.antflix.net#310.12_(D))", + "displayTitle": "(D) Grounded Conductors", + "children": [], + "url": "https://2023.antflix.net#310.12_(D)" + } + ], + "url": "https://2023.antflix.net#310.12" + }, + { + "displayTitle": "310.14 Ampacities for Conductors Rated 0 Volts \u2014 2000 Volts", + "children": [ + { + "displayTitle": "(A) General", + "children": [ + { + "body": "Ampacities for conductors shall be permitted to be determined by tables as provided in 310.15 or under engineering supervision as provided in 310.14(B). Informational Note No. 1: See 210.19, Informational Note, for voltage drop on branch circuits that this section does not take into consideration. See 215.2(A)(2), Informational Note No. 2, for voltage drop on feeders that this section does not take into consideration. Informational Note No. 2: See NFPA 79-2021, Electrical Standard for Industrial Machinery, Table 12.5.1, for the allowable ampacities of Type MTW wire. [310.14_(A)_(1)](https://2023.antflix.net#310.14_(A)_(1))", + "displayTitle": "(1) Tables or Engineering Supervision", + "children": [], + "url": "https://2023.antflix.net#310.14_(A)_(1)" + }, + { + "body": "Where more than one ampacity applies for a given circuit length, the lowest value shall be used. Exception: Where different ampacities apply to portions of a circuit, the higher ampacity shall be permitted to be used if the total portion(s) of the circuit with lower ampacity does not exceed the lesser of 3.0 m (10 ft) or 10 percent of the total circuit. Informational Note: See 110.14(C) for conductor temperature limitations due to termination provisions. [310.14_(A)_(2)](https://2023.antflix.net#310.14_(A)_(2))", + "displayTitle": "(2) Selection of Ampacity", + "children": [], + "url": "https://2023.antflix.net#310.14_(A)_(2)" + }, + { + "body": "No conductor shall be used in such a manner that its operating temperature exceeds that designated for the type of insulated conductor involved. In no case shall conductors be associated together in such a way, with respect to type of circuit, the wiring method employed, or the number of conductors, that the limiting temperature of any conductor is exceeded. Informational Note No. 1: See Table 310.4(1) and Table 315.10(A) for the temperature rating of a conductor that is the maximum temperature, at any location along its length, that the conductor can withstand over a prolonged time period without serious degradation. The ampacity tables of Article 310 and the ampacity tables of Informative Annex B, the ambient temperature correction factors in 310.15(B), and the notes to the tables provide guidance for coordinating conductor sizes, types, ampacities, ambient temperatures, and number of associated conductors. The principal determinants of operating temperature are as follows:Ambient temperature - ambient temperature may vary along the conductor length as well as from time to time.Heat generated internally in the conductor as the result of load current flow, including fundamental and harmonic currents.The rate at which generated heat dissipates into the ambient medium. Thermal insulation that covers or surrounds conductors affects the rate of heat dissipation.Adjacent load-carrying conductors - adjacent conductors have the dual effect of raising the ambient temperature and impeding heat dissipation.Informational Note No. 2: Refer to 110.14(C) for the temperature limitation of terminations. [310.14_(A)_(3)](https://2023.antflix.net#310.14_(A)_(3))", + "displayTitle": "(3) Temperature Limitation of Conductors", + "children": [], + "url": "https://2023.antflix.net#310.14_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#310.14_(A)" + }, + { + "body": "Under engineering supervision, conductor ampacities shall be permitted to be calculated by means of Equation 310.14(B). [310.14(B)] where: Tc = conductor temperature in degrees Celsius (\u00b0C) Ta = ambient temperature in degrees Celsius (\u00b0C) Rdc = dc resistance of 305 mm (1 ft) of conductor in microohms at temperature, Tc Yc = component ac resistance resulting from skin effect and proximity effect Rca = effective thermal resistance between conductor and surrounding ambient [310.14_(B)](https://2023.antflix.net#310.14_(B))", + "displayTitle": "(B) Engineering Supervision", + "children": [], + "url": "https://2023.antflix.net#310.14_(B)" + } + ], + "url": "https://2023.antflix.net#310.14" + }, + { + "displayTitle": "310.15 Ampacity Tables", + "children": [ + { + "body": "Ampacities for conductors rated 0 volts to 2000 volts shall be as specified in the Ampacity Table 310.16 through Table 310.21, as modified by 310.15(A) through (F) and 310.12. Under engineering supervision, ampacities of sizes not shown in ampacity tables for conductors meeting the general wiring requirements shall be permitted to be determined by interpolation of the adjacent conductors based on the conductor's circular-mil area. The temperature correction and adjustment factors shall be permitted to be applied to the ampacity for the temperature rating of the conductor, if the corrected and adjusted ampacity does not exceed the ampacity for the temperature rating of the termination in accordance with 110.14(C). Informational Note No. 1: Table 310.16 through Table 310.19 are application tables for use in determining conductor sizes on loads calculated in accordance with Part II, Part III, Part IV, or Part V of Article 220. Ampacities result from consideration of one or more of the following:Temperature compatibility with connected equipment, especially the connection pointsCoordination with circuit and system overcurrent protectionCompliance with the requirements of product listings or certifications.Preservation of the safety benefits of established industry practices and standardized proceduresInformational Note No. 2: See Chapter 9, Table 8, Conductor Properties, for conductor area. Interpolation is based on the conductor circular-mil area and not the conductor overall area.Informational Note No. 3: See 400.5 for the ampacities of flexible cords and cables. See 402.5 for the ampacities of fixture wires.Informational Note No. 4: See Table 310.4(1) and Table 310.4(2) for explanation of type letters used in tables and for recognized sizes of conductors for the various conductor insulations. See 310.1 through 310.14 and the various articles of this Code for installation requirements. See Table 400.4, Table 400.5(A)(1), and Table 400.5(A)(2) for flexible cords. [310.15_(A)](https://2023.antflix.net#310.15_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#310.15_(A)" + }, + { + "displayTitle": "(B) Ambient Temperature Correction Factors", + "children": [ + { + "body": "Ampacities for ambient temperatures other than those shown in the ampacity tables shall be corrected in accordance with Table 310.15(B)(1)(1) or Table 310.15(B)(1)(2), or shall be permitted to be calculated using Equation 310.15(B)(1). [310.15(B)(1)] where: I' = ampacity corrected for ambient temperature I = ampacity shown in the tables Tc = temperature rating of conductor (\u00b0C) Ta' = new ambient temperature (\u00b0C) Ta = ambient temperature used in the table (\u00b0C) \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nTable 310.15(B)(1)(1) Ambient Temperature Correction Factors Based on 30\u00b0C (86\u00b0F) For ambient temperatures other than 30\u00b0C (86\u00b0F), multiply the ampacities specified in the ampacity tables by the appropriate correction factor shown below. Ambient Temperature (\u00b0C) Temperature Rating of Conductor Ambient Temperature (\u00b0F) 60\u00b0C 75\u00b0C 90\u00b0C 10 or less 1.29 1.20 1.15 50 or less 11\u201415 1.22 1.15 1.12 51\u201459 16\u201420 1.15 1.11 1.08 60\u201468 21\u201425 1.08 1.05 1.04 69\u201477 26\u201430 1.00 1.00 1.00 78\u201486 31\u201435 0.91 0.94 0.96 87\u201495 36\u201440 0.82 0.88 0.91 96\u2014104 41\u201445 0.71 0.82 0.87 105\u2014113 46\u201450 0.58 0.75 0.82 114\u2014122 51\u201455 0.41 0.67 0.76 123\u2014131 56\u201460 - 0.58 0.71 132\u2014140 61\u201465 - 0.47 0.65 141\u2014149 66\u201470 - 0.33 0.58 150\u2014158 71\u201475 - - 0.50 159\u2014167 76\u201480 - - 0.41 168\u2014176 81\u201485 - - 0.29 177\u2014185 Note: Table 310.15(B)(1)(1) shall be used with Table 310.16 and Table 310.17 as required. Table 310.15(B)(1)(2) Ambient Temperature Correction Factors Based on 40\u00b0C (104\u00b0F) For ambient temperatures other than 40\u00b0C (104\u00b0F), multiply the ampacities specified in the ampacity tables by the appropriate correction factor shown below. Ambient Temperature (\u00b0C) Temperature Rating of Conductor Ambient Temperature (\u00b0F) 60\u00b0C 75\u00b0C 90\u00b0C 150\u00b0C 200\u00b0C 250\u00b0C 10 or less 1.58 1.36 1.26 1.13 1.09 1.07 50 or less 11\u201415 1.50 1.31 1.22 1.11 1.08 1.06 51\u201459 16\u201420 1.41 1.25 1.18 1.09 1.06 1.05 60\u201468 21\u201425 1.32 1.2 1.14 1.07 1.05 1.04 69\u201477 26\u201430 1.22 1.13 1.10 1.04 1.03 1.02 78\u201486 31\u201435 1.12 1.07 1.05 1.02 1.02 1.01 87\u201495 36\u201440 1.00 1.00 1.00 1.00 1.00 1.00 96\u2014104 41\u201445 0.87 0.93 0.95 0.98 0.98 0.99 105\u2014113 46\u201450 0.71 0.85 0.89 0.95 0.97 0.98 114\u2014122 51\u201455 0.50 0.76 0.84 0.93 0.95 0.96 123\u2014131 56\u201460 - 0.65 0.77 0.90 0.94 0.95 132\u2014140 61\u201465 - 0.53 0.71 0.88 0.92 0.94 141\u2014149 66\u201470 - 0.38 0.63 0.85 0.90 0.93 150\u2014158 71\u201475 - - 0.55 0.83 0.88 0.91 159\u2014167 76\u201480 - - 0.45 0.80 0.87 0.90 168\u2014176 81\u201490 - - - 0.74 0.83 0.87 177\u2014194 91\u2014100 - - - 0.67 0.79 0.85 195\u2014212 101\u2014110 - - - 0.60 0.75 0.82 213\u2014230 111\u2014120 - - - 0.52 0.71 0.79 231\u2014248 121\u2014130 - - - 0.43 0.66 0.76 249\u2014266 131\u2014140 - - - 0.30 0.61 0.72 267\u2014284 141\u2014160 - - - - 0.50 0.65 285\u2014320 161\u2014180 - - - - 0.35 0.58 321\u2014356 181\u2014200 - - - - - 0.49 357\u2014392 201\u2014225 - - \u2014 - - 0.35 393\u2014437 Note: Table 310.15(B)(1)(2) shall be used with Table 310.18, Table 310.19, Table 310.20, and Table. [310.15_(B)_(1)](https://2023.antflix.net#310.15_(B)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#310.15_(B)_(1)" + }, + { + "body": "For raceways or cables exposed to direct sunlight on or above rooftops where the distance above the roof to the bottom of the raceway or cable is less than 19 mm (3/4 in.), a temperature adder of 33\u00b0C (60\u00b0F) shall be added to the outdoor temperature to determine the applicable ambient temperature for application of the correction factors in Table 310.15(B)(1)(1) or Table 310.15(B)(1)(2). Exception: Type XHHW-2 insulated conductors shall not be subject to this ampacity adjustment. Informational Note: The ASHRAE Handbook - Fundamentals is one source for the ambient temperatures in various locations. [310.15_(B)_(2)](https://2023.antflix.net#310.15_(B)_(2))", + "displayTitle": "(2) Rooftop", + "children": [], + "url": "https://2023.antflix.net#310.15_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#310.15_(B)" + }, + { + "displayTitle": "(C) Adjustment Factors", + "children": [ + { + "body": "The ampacity of each conductor shall be reduced as shown in Table 310.15(C)(1) where the number of current-carrying conductors in a raceway or cable exceeds three, or where single conductors or multiconductor cables not installed in raceways are installed without maintaining spacing for a continuous length longer than 600 mm (24 in.). Each current-carrying conductor of a paralleled set of conductors shall be counted as a current-carrying conductor.\nWhere conductors of different systems, as provided in 300.3, are installed in a common raceway or cable, the adjustment factors shown in Table 310.15(C)(1) shall apply only to the number of power and lighting conductors.\nInformational Note No. 1: See Informative Annex B for adjustment factors for more than three current-carrying conductors in a raceway or cable with load diversity.\nInformational Note No. 2: See 366.23 for adjustment factors for conductors and ampacity for bare copper and aluminum bars in auxiliary gutters and 376.22(B) for adjustment factors for conductors in metal wireways.\n\nWhere conductors are installed in cable trays, 392.80 shall apply.\nAdjustment factors shall not apply to conductors in raceways having a length not exceeding 600 mm (24 in.).\nAdjustment factors shall not apply to underground conductors entering or leaving an outdoor trench if those conductors have physical protection in the form of rigid metal conduit, intermediate metal conduit, rigid polyvinyl chloride conduit (PVC), or reinforced thermosetting resin conduit (RTRC) having a length not exceeding 3.05 m (10 ft), and if the number of conductors does not exceed four.\n\nAdjustment factors shall not apply to Type AC cable or to Type MC cable under the following conditions:\n\nThe cables do not have an overall outer jacket.\nEach cable has not more than three current-carrying conductors.\nThe conductors are 12 AWG copper.\nNot more than 20 current-carrying conductors are installed without maintaining spacing, are stacked, or are supported on \"bridle rings.\"\n\n\n\nException to (4): If cables meeting the requirements in 310.15(C)(1)(d)(1) through (C)(1)(d)(3) with more than 20 current-carrying conductors are installed longer than 600 mm (24 in.) without maintaining spacing, are stacked, or are supported on bridle rings, a 60 percent adjustment factor shall be applied.\ne 310.21 as required.\nTable 310.15(C)(1) Adjustment Factors for More Than Three Current-Carrying Conductors\n\n\n\nNumber of Conductors*\nPercent of Values inTable 310.16 Through Table 310.19as Adjusted for Ambient Temperature if Necessary\n\n\n\n\n4\u20146\n80\n\n\n7\u20149\n70\n\n\n10\u201420\n50\n\n\n21\u201430\n45\n\n\n31\u201440\n40\n\n\n41 and above\n35\n\n\n\n*Number of conductors is the total number of conductors in the raceway or cable, including spare conductors. The count shall be adjusted in accordance with 310.15(E) and (F). The count shall not include conductors that are connected to electrical components that cannot be simultaneously energized. [310.15_(C)_(1)](https://2023.antflix.net#310.15_(C)_(1))", + "displayTitle": "(1) More Than Three Current-Carrying Conductors", + "children": [], + "url": "https://2023.antflix.net#310.15_(C)_(1)" + }, + { + "body": "Spacing between raceways shall be maintained. [310.15_(C)_(2)](https://2023.antflix.net#310.15_(C)_(2))", + "displayTitle": "(2) Raceway Spacing", + "children": [], + "url": "https://2023.antflix.net#310.15_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#310.15_(C)" + }, + { + "body": "Where bare or covered conductors are installed with insulated conductors, the temperature rating of the bare or covered conductor shall be equal to the lowest temperature rating of the insulated conductors for the purpose of determining ampacity. [310.15_(D)](https://2023.antflix.net#310.15_(D))", + "displayTitle": "(D) Bare or Covered Conductors", + "children": [], + "url": "https://2023.antflix.net#310.15_(D)" + }, + { + "body": "Neutral conductors shall be considered current carrying in accordance with any of the following: A neutral conductor that carries only the unbalanced current from other conductors of the same circuit shall not be required to be counted when applying the provisions of 310.15(C)(1).In a 3-wire circuit consisting of two phase conductors and the neutral conductor of a 4-wire, 3-phase, wye-connected system, the neutral conductor carries approximately the same current as the line-to-neutral load currents of the other conductors and shall be counted when applying 310.15(C)(1).On a 4-wire, 3-phase wye circuit where the major portion of the load consists of nonlinear loads, harmonic currents are present in the neutral conductor; the neutral conductor shall therefore be considered a current-carrying conductor. [310.15_(E)](https://2023.antflix.net#310.15_(E))", + "displayTitle": "(E) Neutral Conductor", + "children": [], + "url": "https://2023.antflix.net#310.15_(E)" + }, + { + "body": "A grounding or bonding conductor shall not be counted when applying the provisions of 310.15(C)(1). [310.15_(F)](https://2023.antflix.net#310.15_(F))", + "displayTitle": "(F) Grounding or Bonding Conductor", + "children": [], + "url": "https://2023.antflix.net#310.15_(F)" + } + ], + "url": "https://2023.antflix.net#310.15" + }, + { + "body": "The ampacities shall be as specified in Table 310.16 where all of the following conditions apply: (1) Conductors are rated 0 volts through 2000 volts. (2) Conductors are rated 60\u00b0C (140\u00b0F), 75\u00b0C (167\u00b0F), or 90\u00b0C (194\u00b0F). (3) Wiring is installed in a 30\u00b0C (86\u00b0F) ambient temperature. (4) There are not more than three current-carrying conductors. Table 310.16 Ampacities of Insulated Conductors with Not More Than Three Current-Carrying Conductors in Raceway, Cable, or Earth (Directly Buried) Size AWG or kcmil Temperature Rating of Conductor [See Table 310.4(1)] Size AWG or kcmil 60\u00b0C (140\u00b0F) 75\u00b0C (167\u00b0F) 90\u00b0C (194\u00b0F) 60\u00b0C (140\u00b0F) 75\u00b0C (167\u00b0F) 90\u00b0C (194\u00b0F) Types TW, UF Types RHW, THHW, THW, THWN, XHHW, XHWN, USE, ZW Types TBS, SA, SIS, FEP, FEPB, MI, PFA, RHH, RHW-2, THHN, THHW, THW-2, THWN-2, USE-2, XHH, XHHW, XHHW-2, XHWN, XHWN-2, XHHN, Z, ZW-2 Types TW, UF Types RHW, THHW, THW, THWN, XHHW, XHWN, USE Types TBS, SA, SIS, THHN, THHW, THW-2, THWN-2, RHH, RHW-2, USE-2, XHH, XHHW, XHHW-2, XHWN, XHWN-2, XHHN COPPER ALUMINUM OR COPPER-CLAD ALUMINUM 18* - - 14 - - - - 16* - - 18 - - - - 14* 15 20 25 - - - - 12* 20 25 30 15 20 25 12* 10* 30 35 40 25 30 35 10* 8 40 50 55 35 40 45 8 6 55 65 75 40 50 55 6 4 70 85 95 55 65 75 4 3 85 100 115 65 75 85 3 2 95 115 130 75 90 100 2 1 110 130 145 85 100 115 1 1/0 125 150 170 100 120 135 1/0 2/0 145 175 195 115 135 150 2/0 3/0 165 200 225 130 155 175 3/0 4/0 195 230 260 150 180 205 4/0 250 215 255 290 170 205 230 250 300 240 285 320 195 230 260 300 350 260 310 350 210 250 280 350 400 280 335 380 225 270 305 400 500 320 380 430 260 310 350 500 600 350 420 475 285 340 385 600 700 385 460 520 315 375 425 700 750 400 475 535 320 385 435 750 800 410 490 555 330 395 445 800 900 435 520 585 355 425 480 900 1000 455 545 615 375 445 500 1000 1250 495 590 665 405 485 545 1250 1500 525 625 705 435 520 585 1500 1750 545 650 735 455 545 615 1750 2000 555 665 750 470 560 630 2000 Notes: 1. Section 310.15(B) shall be referenced for ampacity correction factors where the ambient temperature is other than 30\u00b0C (86\u00b0F). 2. Section 310.15(C)(1) shall be referenced for more than three current-carrying conductors. 3. Section 310.16 shall be referenced for conditions of use. *Section 240.4(D) shall be referenced for conductor overcurrent protection limitations, except as modified elsewhere in the Code. [310.16](https://2023.antflix.net#310.16)", + "displayTitle": "310.16 Ampacities of Insulated Conductors in Raceway, Cable, or Earth (Directly Buried)", + "children": [], + "url": "https://2023.antflix.net#310.16" + }, + { + "body": "The ampacities shall be as specified in Table 310.17 where all of the following conditions apply: (1) Conductors are rated 0 volts through 2000 volts. (2) Conductors are rated 60\u00b0C (140\u00b0F), 75\u00b0C (167\u00b0F), or 90\u00b0C (194\u00b0F). (3) Wiring is installed in a 30\u00b0C (86\u00b0F) ambient temperature. Table 310.17 Ampacities of Single-Insulated Conductors in Free Air Size AWG or kcmil Temperature Rating of Conductor [See Table 310.4(1)] Size AWG or kcmil 60\u00b0C (140\u00b0F) 75\u00b0C (167\u00b0F) 90\u00b0C (194\u00b0F) 60\u00b0C (140\u00b0F) 75\u00b0C (167\u00b0F) 90\u00b0C (194\u00b0F) Types TW, UF Types RHW, THHW, THW. THWN, XHHW, XHWN, ZW Types TBS, SA, SIS, FEP, FEPB, MI, PFA, RHH, RHW-2. THHN, THHW. THW-2, THWN-2, USE-2, XHH, XHHW, XHHW-2, XHWN, XHWN-2, XHHN, Z, ZW-2 Types TW, UF Types RHW, THHW, THW, THWN, XHHW, XHWN Types TBS, SA, SIS, THHN, THHW, THW-2, THWN-2, RHH, RHW-2, USE-2, XHH, XHHW, XHHW-2, XHWN, XHWN-2, XHHN COPPER ALUMINUM OR COPPER-CLAD ALUMINUM 18 - - 18 - - - - 16 - - 24 - - - - 14* 25 30 35 - - - - 12* 30 35 40 25 30 35 12* 10* 40 50 55 35 40 45 10* 8 60 70 80 45 55 60 8 6 80 95 105 60 75 85 6 4 105 125 140 80 100 115 4 3 120 145 165 95 115 130 3 2 140 170 190 110 135 150 2 1 165 195 220 130 155 175 1 1/0 195 230 260 150 180 205 1/0 2/0 225 265 300 175 210 235 2/0 3/0 260 310 350 200 240 270 3/0 4/0 300 360 405 235 280 315 4/0 250 340 405 455 265 315 355 250 300 375 445 500 290 350 395 300 350 420 505 570 330 395 445 350 400 455 545 615 355 425 480 400 500 515 620 700 405 485 545 500 600 575 690 780 455 545 615 600 700 630 755 850 500 595 670 700 750 655 785 885 515 620 700 750 800 680 815 920 535 645 725 800 900 730 870 980 580 700 790 900 1000 780 935 1055 625 750 845 1000 1250 890 1065 1200 710 855 965 1250 1500 980 1175 1325 795 950 1070 1500 1750 1070 1280 1445 875 1050 1185 1750 2000 1155 1385 1560 960 1150 1295 2000 Notes: 1. Section 310.15(B) shall be referenced for ampacity correction factors where the ambient temperature is other than 30\u00b0C (86\u00b0F). 2. Section 310.17 shall be referenced for conditions of use. *Section 240.4(D) shall be referenced for conductor overcurrent protection limitations, except as modified elsewhere in the Code. [310.17](https://2023.antflix.net#310.17)", + "displayTitle": "310.17 Ampacities of Single-Insulated Conductors in Free Air", + "children": [], + "url": "https://2023.antflix.net#310.17" + }, + { + "body": "The ampacities shall be as specified in Table 310.18 where all of the following conditions apply: (1) Conductors are rated 0 volts through 2000 volts. (2) Conductors are rated 150\u00b0C (302\u00b0F), 200\u00b0C (392\u00b0F), or 250\u00b0C (482\u00b0F). (3) Wiring is installed in a 40\u00b0C (104\u00b0F) ambient temperature. (4) There are not more than three current-carrying conductors. Table 310.18 Ampacities of Insulated Conductors with Not More Than Three Current-Carrying Conductors in Raceway or Cable Size AWG or kcmil Temperature Rating of Conductor [See Table 310.4(1)] Size AWG or kcmil 150\u00b0C (302\u00b0F) 200\u00b0C (392\u00b0F) 250\u00b0C (482\u00b0F) 150\u00b0C (302\u00b0F) Type Z Types FEP, FEPB, PFA, SA Types PFAH, TFE Type Z COPPER NICKEL OR NICKEL-COATED COPPER ALUMINUM OR COPPER-CLAD ALUMINUM 14 34 36 39 - 14 12 43 45 54 30 12 10 55 60 73 44 10 8 76 83 93 57 8 6 96 110 117 75 6 4 120 125 148 94 4 3 143 152 166 109 3 2 160 171 191 124 2 1 186 197 215 145 1 1/0 215 229 244 169 1/0 2/0 251 260 273 198 2/0 3/0 288 297 308 227 3/0 4/0 332 346 361 260 4/0 Notes: 1. Section 310.15(B) shall be referenced for ampacity correction factors where the ambient temperature is other than 40\u00b0C (104\u00b0F). 2. Section 310.15(C)(1) shall be referenced for more than three current-carrying conductors. 3. Section 310.18 shall be referenced for conditions of use. [310.18](https://2023.antflix.net#310.18)", + "displayTitle": "310.18 Ampacities of Insulated Conductors in Raceway or Cable", + "children": [], + "url": "https://2023.antflix.net#310.18" + }, + { + "body": "The ampacities shall be as specified in Fable 310.19 where all of the following conditions apply: (1) Conductors are rated 0 volts through 2000 volts. (2) Conductors are rated up to 250\u00b0C (482\u00b0F). (3) Wiring is installed in a 40\u00b0C (104\u00b0F) ambient temperature. Table 310.19 Ampacities of Single-Insulated Conductors in Free Air Size AWG or kcmil Temperature Rating of Conductor [See Table 310.4(1)] Size AWG or kcmil 150\u00b0C (302\u00b0F) 200\u00b0C (392\u00b0F) 250\u00b0C (482\u00b0F) 150\u00b0C (302\u00b0F) Type Z Types FEP, FEPB, PFA, SA Types PFAH, TFE Type Z COPPER NICKEL OR NICKEL-COATED COPPER ALUMINUM OR COPPER-CLAD ALUMINUM 14 46 54 59 - 14 12 60 68 78 47 12 10 80 90 107 63 10 8 106 124 142 83 8 6 155 165 205 112 6 4 190 220 278 148 4 3 214 252 327 170 3 2 255 293 381 198 2 1 293 344 440 228 1 1/0 339 399 532 263 1/0 2/0 390 467 591 305 2/0 3/0 451 546 708 351 3/0 4/0 529 629 830 411 4/0 Notes: 1. Section 310.15(B) shall be referenced for ampacity correction factors where the ambient temperature is other than 40\u00b0C (104\u00b0F). 2. Section 310.19 shall be referenced for conditions of use. [310.19](https://2023.antflix.net#310.19)", + "displayTitle": "310.19 Ampacities of Single-Insulated Conductors in Free Air", + "children": [], + "url": "https://2023.antflix.net#310.19" + }, + { + "body": "The ampacities shall be as specified in Table 310.20 where all of the following conditions apply: (1) Conductors are rated 0 volts through 2000 volts. (2) Conductors are rated 75\u00b0C (167\u00b0F) or 90\u00b0C (194\u00b0F). (3) Wiring is installed in a 40\u00b0C (104\u00b0F) ambient temperature. (4) There are not more than three single-insulated conductors. Table 310.20 Ampacities of Conductors on a Messenger Size AWG or kcmil Temperature Rating of Conductor [See Table 310.4(1)] Size AWG or kcmil 75\u00b0C (167\u00b0F) 90\u00b0C (194\u00b0F) 75\u00b0C (167\u00b0F) 90\u00b0C (194\u00b0F) Types RHW, THHW, THW, THWN, XHHW, XHWN, ZW Types MI, THHN, THHW, THW-2, THWN-2, RHH, RHW-2, USE-2, XHHW, XHHW-2, XHWN-2, ZW-2 Types RHW, THW, THWN, THHW, XHHW, XHWN Types THHN, THHW, RHH, XHHW, RHW-2, XHHW-2, THW-2, THWN 2, XHWN-2, USE-2, ZW-2 COPPER ALUMINUM OR COPPER-CLAD ALUMINUM 8 57 66 44 51 8 6 76 89 59 69 6 4 101 117 78 91 4 3 118 138 92 107 3 2 135 158 106 123 2 1 158 185 123 144 1 1/0 183 214 143 167 1/0 2/0 212 247 165 193 2/0 3/0 245 287 192 224 3/0 4/0 287 335 224 262 4/0 250 320 374 251 292 250 300 359 419 282 328 300 350 397 464 312 364 350 400 430 503 339 395 400 500 496 580 392 458 500 600 553 647 440 514 600 700 610 714 488 570 700 750 638 747 512 598 750 800 660 773 532 622 800 900 704 826 572 669 900 1000 748 879 612 716 1000 Notes: 1. Section 310.15(B) shall be referenced for ampacity correction factors where the ambient temperature is other than 40\u00b0C (104\u00b0F). 2. Section 310.15(C)(1) shall be referenced for more than three current-carrying conductors. 3. Section 310.20 shall be referenced for conditions of use. [310.20](https://2023.antflix.net#310.20)", + "displayTitle": "310.20 Ampacities of Conductors Supported on a Messenger", + "children": [], + "url": "https://2023.antflix.net#310.20" + }, + { + "body": "The ampacities shall be as specified in Table 310.21 where all of the following conditions apply: Wind velocity is 610 mm/sec (2 ft/sec).Conductors are 80\u00b0C (176\u00b0F) total conductor temperature.Wiring is installed in a 40\u00b0C (104\u00b0F) ambient temperature.Table 310.21 Ampacities of Bare or Covered Conductors in Free Air Copper Conductors AAC Aluminum Conductors Bare Covered Bare Covered AWG or kcmil Amperes AWG or kcmil Amperes AWG or kcmil Amperes AWG or kcmil Amperes 8 98 8 103 8 76 8 80 6 124 6 130 6 96 6 101 4 155 4 163 4 121 4 127 2 209 2 219 2 163 2 171 1/0 282 1/0 297 1/0 220 1/0 231 2/0 329 2/0 344 2/0 255 2/0 268 3/0 382 3/0 401 3/0 297 3/0 312 4/0 444 4/0 466 4/0 346 4/0 364 250 494 250 519 266.8 403 266.8 423 300 556 300 584 336.4 468 336.4 492 500 773 500 812 397.5 522 397.5 548 750 1000 750 1050 477.0 588 477.0 617 1000 1193 1000 1253 556.5 650 556.5 682 - - - - 636.0 709 636.0 744 - - - - 795.0 819 795.0 860 - - - - 954.0 920 - - - - - - 1033.5 968 1033.5 1017 - - - - 1272 1103 1272 1201 - - - - 1590 1267 1590 1381 - - - - 2000 1454 2000 1527 Note: Section 310.21 shall be referenced for conditions of use. [310.21](https://2023.antflix.net#310.21)", + "displayTitle": "310.21 Ampacities of Bare or Covered Conductors in Free Air", + "children": [], + "url": "https://2023.antflix.net#310.21" + } + ], + "url": "https://2023.antflix.net#310" + }, + { + "displayTitle": "Article 312 Cabinets, Cutout Boxes, and Meter Socket Enclosures", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_10_I" + }, + { + "body": "This article covers the installation and construction specifications of cabinets, cutout boxes, and meter socket enclosures. It does not apply to equipment operating at over 1000 volts, except as specifically referenced elsewhere in the Code. [312.1](https://2023.antflix.net#312.1)", + "displayTitle": "312.1 Scope", + "children": [], + "url": "https://2023.antflix.net#312.1" + }, + { + "body": "In damp or wet locations, surface-type enclosures within the scope of this article shall be placed or equipped so as to prevent moisture or water from entering and accumulating within the cabinet or cutout box, and shall be mounted so there is at least 6-mm (1/4-in.) airspace between the enclosure and the wall or other supporting surface. Enclosures installed in wet locations shall be weatherproof. For enclosures in wet locations, raceways or cables entering above the level of uninsulated live parts shall use fittings listed for wet locations. Exception: Nonmetallic enclosures shall be permitted to be installed without the airspace on a concrete, masonry, tile, or similar surface. Informational Note: See 300.6 for protection against corrosion. [312.2](https://2023.antflix.net#312.2)", + "displayTitle": "312.2 Damp or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#312.2" + }, + { + "body": "In walls of concrete, tile, or other noncombustible material, cabinets shall be installed so that the front edge of the cabinet is not set back of the finished surface more than 6 mm (1/4 in.). In walls constructed of wood or other combustible material, cabinets shall be flush with the finished surface or project therefrom. [312.3](https://2023.antflix.net#312.3)", + "displayTitle": "312.3 Position in Wall", + "children": [], + "url": "https://2023.antflix.net#312.3" + }, + { + "body": "Noncombustible surfaces that are broken or incomplete shall be repaired so there will be no gaps or open spaces greater than 3 mm (1/8 in.) at the edge of the cabinet or cutout box employing a flush-type cover. [312.4](https://2023.antflix.net#312.4)", + "displayTitle": "312.4 Repairing Noncombustible Surfaces", + "children": [], + "url": "https://2023.antflix.net#312.4" + }, + { + "body": "Cable assemblies and insulated conductors entering enclosures within the scope of this article shall be protected from abrasion and shall comply with 312.5(A) through (C). [312.5](https://2023.antflix.net#312.5)", + "displayTitle": "312.5 Cabinets, Cutout Boxes, and Meter Socket Enclosures", + "children": [ + { + "body": "Openings through which conductors enter shall be closed in an approved manner. [312.5_(A)](https://2023.antflix.net#312.5_(A))", + "displayTitle": "(A) Openings to Be Closed", + "children": [], + "url": "https://2023.antflix.net#312.5_(A)" + }, + { + "body": "Where metal enclosures within the scope of this article are installed with messenger-supported wiring, open wiring on insulators, or concealed knob-and-tube wiring, conductors shall enter through insulating bushings or, in dry locations, through flexible tubing extending from the last insulating support and firmly secured to the enclosure. [312.5_(B)](https://2023.antflix.net#312.5_(B))", + "displayTitle": "(B) Metal Cabinets, Cutout Boxes, and Meter Socket Enclosures", + "children": [], + "url": "https://2023.antflix.net#312.5_(B)" + }, + { + "body": "Where cable is used, each cable shall be secured to the cabinet, cutout box, or meter socket enclosure. Exception No. 1: Cables with entirely nonmetallic sheaths shall be permitted to enter the top of a surface-mounted enclosure through one or more nonflexible raceways not less than 450 mm (18 in.) and not more than 3.0 m (10 ft) in length, provided all of the following conditions are met: (1) Each cable is fastened within 300 mm (12 in.), measured along the sheath, of the outer end of the raceway. (2) The raceway extends directly above the enclosure and does not penetrate a structural ceiling. (3) A fitting is provided on each end of the raceway to protect the cable(s) from abrasion and the fittings remain accessible after installation. (4) The raceway is sealed or plugged at the outer end using approved means so as to prevent access to the enclosure through the raceway. (5) The cable sheath is continuous through the raceway and extends into the enclosure beyond the fitting not less than 6 mm (1/4 in.). (6) The raceway is fastened at its outer end and at other points in accordance with the applicable article. (7) Where installed as conduit or tubing, the cable fill does not exceed the amount that would be permitted for complete conduit or tubing systems by Table 1 of Chapter 9 of this Code and all applicable notes thereto. Note 2 to the tables in Chapter 9 does not apply to this condition. Informational Note: See Chapter 9, Table 1, including Note 9, for allowable cable fill in circular raceways. See 310.15(C)(1) for required ampacity reductions for multiple cables installed in a common raceway. Exception No. 2: Single conductors and multiconductor cables shall be permitted to enter enclosures in accordance with 392.46(A) or (B). [312.5_(C)](https://2023.antflix.net#312.5_(C))", + "displayTitle": "(C) Cables", + "children": [], + "url": "https://2023.antflix.net#312.5_(C)" + } + ], + "url": "https://2023.antflix.net#312.5" + }, + { + "body": "Conductors at terminals or conductors entering or leaving cabinets, cutout boxes, and meter socket enclosures shall comply with 312.6(A) through (C). Exception: Wire-bending space in enclosures for motor controllers with provisions for one or two wires per terminal shall comply with 430.10(B). [312.6](https://2023.antflix.net#312.6)", + "displayTitle": "312.6 Deflection of Conductors", + "children": [ + { + "body": "Conductors shall not be deflected within a cabinet or cutout box unless a gutter having a width in accordance with Table 312.6(A) is provided. Conductors in parallel in accordance with 310.10(G) shall be judged on the basis of the number of conductors in parallel.\nTable 312.6(A) Minimum Wire-Bending Space at Terminals and Minimum Width of Wiring Gutters\n\n\n\nWire Size (AWG or kcmil)\nWires per Terminal\n\n\nAll Other Conductors\nCompact Stranded AA-8000 AluminumAlloy Conductors (See Note 2)\n1\n2\n3\n4\n5\n\n\nmm\nin.\nmm\nin.\nmm\nin.\nmm\nin.\nmm\nin.\n\n\n\n\n14\u201410\n12\u20148\nNot specified\n-\n-\n-\n-\n-\n-\n-\n-\n\n\n8\u20146\n6\u20144\n38.1\n11/2\n-\n-\n-\n-\n-\n-\n-\n-\n\n\n4\u20143\n2\u20141\n50.8\n2\n-\n-\n-\n-\n-\n-\n-\n-\n\n\n2\n1/0\n63.5\n21/2\n-\n-\n-\n-\n-\n-\n-\n-\n\n\n1\n2/0\n76.2\n3\n-\n-\n-\n-\n-\n-\n-\n-\n\n\n1/0\u20142/0\n3/0\u20144/0\n88.9\n31/2\n127\n5\n178\n7\n-\n-\n-\n-\n\n\n3/0\u20144/0\n250\u2014300\n102\n4\n152\n6\n203\n8\n-\n-\n-\n-\n\n\n250\n350\n114\n41/2\n152\n6\n203\n8\n254\n10\n-\n-\n\n\n300\u2014350\n400\u2014500\n127\n5\n203\n8\n254\n10\n305\n12\n-\n-\n\n\n400\u2014500\n600\u2014750\n152\n6\n203\n8\n254\n10\n305\n12\n356\n14\n\n\n600\u2014700\n800\u20141000\n203\n8\n254\n10\n305\n12\n356\n14\n406\n16\n\n\n750\u2014900\n-\n203\n8\n305\n12\n356\n14\n406\n16\n457\n18\n\n\n1000\u20141250\n-\n254\n10\n-\n-\n-\n-\n-\n-\n-\n-\n\n\n1500\u20142000\n-\n305\n12\n-\n-\n-\n-\n-\n-\n-\n-\n\n\n\nNotes:\n1. Bending space at terminals shall be measured in a straight line from the end of the lug or wire connector (in the direction that the wire leaves the terminal) to the wall, barrier, or obstruction.\n2. This column shall be permitted to be used to determine the minimum wire-bending space for compact stranded aluminum conductors in sizes up to 1000 kcmil and manufactured using AA-8000 series electrical grade aluminum alloy conductor material in accordance with 310.3(B). The minimum width of the wire gutter space shall be determined using the all other conductors value in this table.\n  [312.6_(A)](https://2023.antflix.net#312.6_(A))", + "displayTitle": "(A) Width of Wiring Gutters", + "children": [], + "url": "https://2023.antflix.net#312.6_(A)" + }, + { + "body": "Wire-bending space at each terminal shall be provided in accordance with 312.6(B)(1) or (B)(2). [312.6_(B)](https://2023.antflix.net#312.6_(B))", + "displayTitle": "(B) Wire-Bending Space at Terminals", + "children": [ + { + "body": "Table 312.6(A) shall apply where the conductor does not enter or leave the enclosure through the wall opposite its terminal. [312.6_(B)_(1)](https://2023.antflix.net#312.6_(B)_(1))", + "displayTitle": "(1) Conductors Not Entering or Leaving Opposite Wall", + "children": [], + "url": "https://2023.antflix.net#312.6_(B)_(1)" + }, + { + "body": "Table 312.6(B)(2) shall apply where the conductor does enter or leave the enclosure through the wall opposite its terminal.\nException No. 1: Where the distance between the wall and its terminal is in accordance with Table 312.6(A), a conductor shall be permitted to enter or leave an enclosure through the wall opposite its terminal, provided the conductor enters or leaves the enclosure where the gutter joins an adjacent gutter that has a width that conforms to Table 312.6(B)(2) for the conductor.\nException No. 2: A conductor not larger than 350 kcmil shall be permitted to enter or leave an enclosure containing only a meter socket(s) through the wall opposite its terminal, provided the distance between the terminal and the opposite wall is not less than that specified in Table 312.6(A) and the terminal is a lay-in type or removable lug with integral mounting tang, where the terminal is either of the following:\n(1) Directed toward the opening in the enclosure and within a 45-degree angle of directly facing the enclosure wall\n(2) Directly facing the enclosure wall and offset not greater than 50 percent of the bending space specified in Table 312.6(A)\nInformational Note: Offset is the distance measured along the enclosure wall from the axis of the centerline of the terminal to a line passing through the center of the opening in the enclosure.\nTable 312.6(B)(2) Minimum Wire-Bending Space at Terminals\n\n\n\nWire Size (AWG or kcmil)\nWires per Terminal\n\n\nAll Other Conductors\nCompact StrandedAA-8000 Aluminum Alloy Conductors(See Note 3)\n1\n2\n3\n4 or more\n\n\nmm\nin.\nmm\nin.\nmm\nin.\nmm\nin.\n\n\n\n\n14\u201410\n12\u20148\nNot specified\n-\n-\n-\n \n-\n-\n\n\n8\n6\n38.1\n11/2\n-\n-\n-\n \n-\n-\n\n\n6\n4\n50.8\n2\n-\n-\n-\n \n-\n-\n\n\n4\n2\n76.2\n3\n-\n-\n-\n \n-\n-\n\n\n3\n1\n76.2\n3\n-\n-\n-\n \n-\n-\n\n\n2\n1/0\n88.9\n31/2\n-\n-\n-\n \n-\n-\n\n\n1\n2/0\n114\n41/2\n-\n-\n-\n \n-\n-\n\n\n1/0\n3/0\n140\n51/2\n140\n51/2\n178\n7\n-\n-\n\n\n2/0\n4/0\n152\n6\n152\n6\n190\n71/2\n-\n-\n\n\n3/0\n250\n165a\n61/2a\n165a\n61/2a\n203\n8\n-\n-\n\n\n4/0\n300\n178b\n7b\n190c\n71/2c\n216a\n81/2a\n-\n-\n\n\n250\n350\n216d\n81/2d\n216d\n81/2d\n229b\n9b\n254\n10\n\n\n300\n400\n254e\n10e\n254d\n10d\n279b\n11b\n305\n12\n\n\n350\n500\n305e\n12e\n305e\n12e\n330e\n13e\n356d\n14d\n\n\n400\n600\n330e\n13e\n330e\n13e\n356e\n14e\n381e\n15e\n\n\n500\n700\u2014750\n356e\n14e\n356e\n14e\n381e\n15e\n406e\n16e\n\n\n600\n800\u2014900\n381e\n15e\n406e\n16e\n457e\n18e\n483e\n19e\n\n\n700\n1000\n406e\n16e\n457e\n18e\n508e\n20e\n559e\n22e\n\n\n750\n-\n432e\n17e\n483e\n19e\n559e\n22e\n610e\n24e\n\n\n800\n-\n457\n18\n508\n20\n559\n22\n610\n24\n\n\n900\n-\n483\n19\n559\n22\n610\n24\n610\n24\n\n\n1000\n-\n508\n20\n-\n-\n-\n \n-\n \n\n\n1250\n-\n559\n22\n-\n-\n-\n \n-\n \n\n\n1500\n-\n610\n24\n-\n-\n-\n \n-\n \n\n\n1750\n-\n610\n24\n-\n-\n-\n \n-\n \n\n\n2000\n\u2014\n610\n24\n-\n-\n-\n \n-\n \n\n\n\nNotes:\n1. Bending space at terminals shall be measured in a straight line from the end of the lug or wire connector in a direction perpendicular to the enclosure wall.\n2. For removable and lay-in wire terminals intended for only one wire, bending space shall be permitted to be reduced by the following number of millimeters (inches):\na12.7 mm (1/2 in.)\nb25.4 mm (1 in.)\nc38.1 mm (11/2 in.)\nd50.8 mm (2 in.)\ne76.2 mm (3 in.)\n3. This column shall be permitted to determine the required wire-bending space for compact stranded aluminum conductors in sizes up to 1000 kcmil and manufactured using AA-8000 series electrical grade aluminum alloy conductor material in accordance with 310.3(B). [312.6_(B)_(2)](https://2023.antflix.net#312.6_(B)_(2))", + "displayTitle": "(2) Conductors Entering or Leaving Opposite Wall", + "children": [], + "url": "https://2023.antflix.net#312.6_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#312.6_(B)" + }, + { + "body": "Installation shall comply with 300.4(G). [312.6_(C)](https://2023.antflix.net#312.6_(C))", + "displayTitle": "(C) Conductors 4 AWG or Larger", + "children": [], + "url": "https://2023.antflix.net#312.6_(C)" + } + ], + "url": "https://2023.antflix.net#312.6" + }, + { + "body": "Cabinets and cutout boxes shall have approved space to accommodate all conductors installed in them without crowding. [312.7](https://2023.antflix.net#312.7)", + "displayTitle": "312.7 Space in Enclosures", + "children": [], + "url": "https://2023.antflix.net#312.7" + }, + { + "body": "The wiring space within enclosures for switches and overcurrent devices shall be permitted for other wiring and equipment subject to limitations for specific equipment as provided in 312.8(A) and (B). [312.8](https://2023.antflix.net#312.8)", + "displayTitle": "312.8 Switch and Overcurrent Device Enclosures", + "children": [ + { + "body": "The wiring space of enclosures for switches or overcurrent devices shall be permitted for conductors feeding through, spliced, or tapping off to other enclosures, switches, or overcurrent devices where all of the following conditions are met: The total of all conductors installed at any cross section of the wiring space does not exceed 40 percent of the cross-sectional area of that space.The total area of all conductors, splices, and taps installed at any cross section of the wiring space does not exceed 75 percent of the cross-sectional area of that space.The bending space for conductors 4 AWG and larger complies with 314.28(A)(2).A warning label complying with 110.21(B) is applied to the enclosure that identifies the closest disconnecting means for any feed-through conductors. [312.8_(A)](https://2023.antflix.net#312.8_(A))", + "displayTitle": "(A) Splices, Taps, and Feed-Through Conductors", + "children": [], + "url": "https://2023.antflix.net#312.8_(A)" + }, + { + "body": "The wiring space of enclosures for switches or overcurrent devices shall be permitted to contain power monitoring or energy management equipment in accordance with 312.8(B)(1) through (B)(3). [312.8_(B)](https://2023.antflix.net#312.8_(B))", + "displayTitle": "(B) Power Monitoring or Energy Management Equipment", + "children": [ + { + "body": "Power monitoring or energy management equipment shall either be identified as a field installable accessory as part of the listed equipment or be a listed kit evaluated for field installation in switch or overcurrent device enclosures. [312.8_(B)_(1)](https://2023.antflix.net#312.8_(B)_(1))", + "displayTitle": "(1) Identification", + "children": [], + "url": "https://2023.antflix.net#312.8_(B)_(1)" + }, + { + "body": "The total area of all conductors, splices, taps, and equipment at any cross section of the wiring space shall not exceed 75 percent of the cross-sectional area of that space. [312.8_(B)_(2)](https://2023.antflix.net#312.8_(B)_(2))", + "displayTitle": "(2) Area", + "children": [], + "url": "https://2023.antflix.net#312.8_(B)_(2)" + }, + { + "body": "Conductors used exclusively for control or instrumentation circuits shall comply with either 312.8(B)(3)(a) or (B)(3)(b). Conductors shall comply with 724.49.Conductors smaller than 18 AWG, but not smaller than 22 AWG for a single conductor and 26 AWG for a multiconductor cable, shall be permitted to be used where the conductors and cable assemblies meet all of the following conditions:Are enclosed within raceways or routed along one or more walls of the enclosure and secured at intervals that do not exceed 250 mm (10 in.)Are secured within 250 mm (10 in.) of terminationsAre secured to prevent contact with current carrying components within the enclosureAre rated for the system voltage and not less than 600 voltsHave a minimum insulation temperature rating of 90\u00b0C [312.8_(B)_(3)](https://2023.antflix.net#312.8_(B)_(3))", + "displayTitle": "(3) Conductors", + "children": [], + "url": "https://2023.antflix.net#312.8_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#312.8_(B)" + } + ], + "url": "https://2023.antflix.net#312.8" + }, + { + "body": "Cabinets and cutout boxes shall be provided with back-wiring spaces, gutters, or wiring compartments as required by 312.101(C) and (D). [312.9](https://2023.antflix.net#312.9)", + "displayTitle": "312.9 Side or Back Wiring Spaces or Gutters", + "children": [], + "url": "https://2023.antflix.net#312.9" + }, + { + "body": "Screws or other fasteners installed in the field that enter wiring spaces shall be as provided by or specified by the manufacturer or shall comply with the following as applicable: Screws shall be machine type with blunt ends.Other fasteners shall have blunt ends.Screws or other fasteners shall extend into the enclosure no more than 6 mm (1/4 in.) unless the end is protected with an approved means.Exception to (3): Screws or other fasteners shall be permitted to extend into the enclosure not more than 11 mm (7/16 in.) if located within 10 mm (3/8 in.) of an enclosure wall. [312.10](https://2023.antflix.net#312.10)", + "displayTitle": "312.10 Screws or Other Fasteners", + "children": [], + "url": "https://2023.antflix.net#312.10" + }, + { + "displayTitle": "Part II Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_10_II" + }, + { + "body": "Cabinets, cutout boxes, and meter socket enclosures shall comply with 312.100(A) through (C). [312.100](https://2023.antflix.net#312.100)", + "displayTitle": "312.100 Material", + "children": [ + { + "body": "Metal enclosures within the scope of this article shall be protected both inside and outside against corrosion. [312.100_(A)](https://2023.antflix.net#312.100_(A))", + "displayTitle": "(A) Metal Cabinets and Cutout Boxes", + "children": [], + "url": "https://2023.antflix.net#312.100_(A)" + }, + { + "body": "The design and construction of enclosures within the scope of this article shall be such as to secure ample strength and rigidity. If constructed of sheet steel, the metal thickness shall not be less than 1.35 mm (0.053 in.) uncoated. [312.100_(B)](https://2023.antflix.net#312.100_(B))", + "displayTitle": "(B) Strength", + "children": [], + "url": "https://2023.antflix.net#312.100_(B)" + }, + { + "body": "Nonmetallic cabinets shall be listed, or they shall be submitted for approval prior to installation. [312.100_(C)](https://2023.antflix.net#312.100_(C))", + "displayTitle": "(C) Nonmetallic Cabinets", + "children": [], + "url": "https://2023.antflix.net#312.100_(C)" + } + ], + "url": "https://2023.antflix.net#312.100" + }, + { + "body": "The spacing within cabinets and cutout boxes shall comply with 312.101(A) through (D). [312.101](https://2023.antflix.net#312.101)", + "displayTitle": "312.101 Spacing", + "children": [ + { + "body": "Spacing within cabinets and cutout boxes shall provide approved spacing for the distribution of wires and cables placed in them and for a separation between metal parts of devices and apparatus mounted within them in accordance with 312.101(A)(1), (A)(2), and (A)(3). [312.101_(A)](https://2023.antflix.net#312.101_(A))", + "displayTitle": "(A) General", + "children": [ + { + "body": "Other than at points of support, there shall be an airspace of at least 1.59 mm (0.0625 in.) between the base of the device and the wall of any metal cabinet or cutout box in which the device is mounted. [312.101_(A)_(1)](https://2023.antflix.net#312.101_(A)_(1))", + "displayTitle": "(1) Base", + "children": [], + "url": "https://2023.antflix.net#312.101_(A)_(1)" + }, + { + "body": "There shall be an airspace of at least 25.4 mm (1.00 in.) between any live metal part, including live metal parts of enclosed fuses, and the door. Exception: Where the door is lined with an approved insulating material or is of a thickness of metal not less than 2.36 mm (0.093 in.) uncoated, the airspace shall not be less than 12.7 mm (0.500 in.). [312.101_(A)_(2)](https://2023.antflix.net#312.101_(A)_(2))", + "displayTitle": "(2) Doors", + "children": [], + "url": "https://2023.antflix.net#312.101_(A)_(2)" + }, + { + "body": "There shall be an airspace of at least 12.7 mm (0.500 in.) between the walls, back, gutter partition, if of metal, or door of any cabinet or cutout box and the nearest exposed current-carrying part of devices mounted within the cabinet where the voltage does not exceed 250. This spacing shall be increased to at least 25.4 mm (1.00 in.) for voltages of 251 to 1000, nominal. Exception: Where the conditions in 312.101(A)(2), Exception, are met, the airspace for nominal voltages from 251 to 600 shall be permitted to be not less than 12.7 mm (0.500 in.). [312.101_(A)_(3)](https://2023.antflix.net#312.101_(A)_(3))", + "displayTitle": "(3) Live Parts", + "children": [], + "url": "https://2023.antflix.net#312.101_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#312.101_(A)" + }, + { + "body": "Cabinets and cutout boxes shall be deep enough to allow the closing of the doors when 30-ampere branch-circuit panelboard switches are in any position, when combination cutout switches are in any position, or when other single-throw switches are opened as far as their construction permits. [312.101_(B)](https://2023.antflix.net#312.101_(B))", + "displayTitle": "(B) Switch Clearance", + "children": [], + "url": "https://2023.antflix.net#312.101_(B)" + }, + { + "body": "Cabinets and cutout boxes that contain devices or apparatus connected within the cabinet or box to more than eight conductors, including those of branch circuits, meter loops, feeder circuits, power circuits, and similar circuits, but not including the supply circuit or a continuation thereof, shall have back-wiring spaces or one or more side-wiring spaces, side gutters, or wiring compartments. [312.101_(C)](https://2023.antflix.net#312.101_(C))", + "displayTitle": "(C) Wiring Space", + "children": [], + "url": "https://2023.antflix.net#312.101_(C)" + }, + { + "body": "Side-wiring spaces, side gutters, or side-wiring compartments of cabinets and cutout boxes shall be made tight enclosures by means of covers, barriers, or partitions extending from the bases of the devices contained in the cabinet, to the door, frame, or sides of the cabinet. Exception: Side-wiring spaces, side gutters, and side-wiring compartments of cabinets shall not be required to be made tight enclosures where those side spaces contain only conductors that enter the cabinet directly opposite to the devices where they terminate. Partially enclosed back-wiring spaces shall be provided with covers to complete the enclosure. Wiring spaces that are required by 312.101(C) and are exposed when doors are open shall be provided with covers to complete the enclosure. Where space is provided for feed-through conductors and for splices as required in 312.8, additional barriers shall not be required. [312.101_(D)](https://2023.antflix.net#312.101_(D))", + "displayTitle": "(D) Wiring Space - Enclosure", + "children": [], + "url": "https://2023.antflix.net#312.101_(D)" + } + ], + "url": "https://2023.antflix.net#312.101" + }, + { + "body": "Cabinets, cutout boxes, and meter socket enclosures shall be equipped with doors or covers. [312.102](https://2023.antflix.net#312.102)", + "displayTitle": "312.102 Doors or Covers", + "children": [], + "url": "https://2023.antflix.net#312.102" + } + ], + "url": "https://2023.antflix.net#312" + }, + { + "displayTitle": "Article 314 Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; And Handhole Enclosures", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_11_I" + }, + { + "body": "This article covers the installation and use of all boxes and conduit bodies used as outlet, device, junction, or pull boxes, depending on their use, and handhole enclosures. Cast metal, sheet metal, nonmetallic, and other boxes such as FS, FD, and larger boxes are not classified as conduit bodies. This article also includes installation requirements for fittings used to join raceways and to connect raceways and cables to boxes and conduit bodies. [314.1](https://2023.antflix.net#314.1)", + "displayTitle": "314.1 Scope", + "children": [], + "url": "https://2023.antflix.net#314.1" + }, + { + "body": "Round boxes shall not be used where conduits or connectors requiring the use of locknuts or bushings are to be connected to the side of the box. [314.2](https://2023.antflix.net#314.2)", + "displayTitle": "314.2 Round Boxes", + "children": [], + "url": "https://2023.antflix.net#314.2" + }, + { + "body": "Nonmetallic boxes shall be permitted only with open wiring on insulators, concealed knob-and-tube wiring, cabled wiring methods with entirely nonmetallic sheaths, flexible cords, and nonmetallic raceways. Exception No. 1: Where internal bonding means are provided between all entries, nonmetallic boxes shall be permitted to be used with metal raceways or metal-armored cables. Exception No. 2: Where integral bonding means with a provision for attaching an equipment bonding jumper inside the box are provided between all threaded entries in nonmetallic boxes listed for the purpose, nonmetallic boxes shall be permitted to be used with metal raceways or metal-armored cables. [314.3](https://2023.antflix.net#314.3)", + "displayTitle": "314.3 Nonmetallic Boxes", + "children": [], + "url": "https://2023.antflix.net#314.3" + }, + { + "body": "Metal boxes shall be grounded and bonded in accordance with Parts I, IV, V, VI, VII, and X of Article 250 as applicable, except as permitted in 250.112(I). [314.4](https://2023.antflix.net#314.4)", + "displayTitle": "314.4 Metal Boxes", + "children": [], + "url": "https://2023.antflix.net#314.4" + }, + { + "body": "Screws or other fasteners installed in the field that enter wiring spaces shall be as provided by or specified by the manufacturer or shall comply with the following as applicable: Screws shall be machine type with blunt ends.Other fasteners shall have blunt ends.Screws attaching a cover shall extend no more than 10 mm (3/8 in.).Screws or other fasteners, other than in (3), penetrating a cover shall extend no more than 8 mm (5/16 in.).Screws or other fasteners penetrating a wall of a box exceeding 1650 cm3 (100 in.3) shall extend no more than 6 mm (1/4 in.), or more than 11 mm (7/16 in.) if located within 10 mm (3/8 in.) of an adjacent box wall.Screws or other fasteners penetrating the wall of a box not exceeding 1650 cm3 (100 in.3) and not covered in 314.23(B)(1) shall be made flush with the box interior.Screws or other fasteners penetrating the wall of a conduit body shall be made flush with the conduit body interior.Exception to (3) through (6): A screw shall be permitted to be longer if the end of the screw is protected with an approved means. [314.5](https://2023.antflix.net#314.5)", + "displayTitle": "314.5 Screws or Other Fasteners", + "children": [], + "url": "https://2023.antflix.net#314.5" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_11_II" + }, + { + "body": "In damp or wet locations, boxes, conduit bodies, outlet box hoods, and fittings shall be placed or equipped so as to prevent moisture from entering or accumulating within the box, conduit body, or fitting. Boxes, conduit bodies, outlet box hoods, and fittings installed in wet locations shall be listed for use in wet locations. Approved drainage openings not smaller than 3 mm (1/8 in.) and not larger than 6 mm (1/4 in.) in diameter shall be permitted to be installed in the field in boxes or conduit bodies listed for use in damp or wet locations. For installation of listed drain fittings, larger openings are permitted to be installed in the field in accordance with manufacturer's instructions. Informational Note No. 1: See 314.27(B) for boxes in floors. Informational Note No. 2: See 300.6 for protection against corrosion. [314.15](https://2023.antflix.net#314.15)", + "displayTitle": "314.15 Damp or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#314.15" + }, + { + "body": "Boxes and conduit bodies shall be of an approved size to provide free space for all enclosed conductors. In no case shall the volume of the box, as calculated in 314.16(A), be less than the fill calculation as calculated in 314.16(B). The minimum volume for conduit bodies shall be as calculated in 314.16(C). This section shall not apply to terminal housings supplied with motors or generators. Informational Note: See 430.12 for volume requirements of motor or generator terminal housings. Boxes and conduit bodies enclosing conductors 4 AWG or larger shall also comply with 314.28. Outlet and device boxes shall also comply with 314.24. [314.16](https://2023.antflix.net#314.16)", + "displayTitle": "314.16 Number of Conductors in Outlet, Device, and Junction Boxes, and Conduit Bodies", + "children": [ + { + "body": "The volume of a wiring enclosure (box) shall be the total volume of the assembled sections and, where used, the space provided by plaster rings, domed covers, extension rings, and so forth, that are marked with their volume or are made from boxes the dimensions of which are listed in Table 314.16(A). Where a box is provided with one or more securely installed barriers, the volume shall be apportioned to each of the resulting spaces. Each barrier, if not marked with its volume, shall be considered to take up 8.2 cm3 (1/2 in.3) if metal, and 16.4 cm3 (1.0 in.3) if nonmetallic.\nTable 314.16(A) Metal Boxes\n\n\n\nBox Trade Size\nMinimum Volume\nMaximum Number of Conductors* (arranged by AWG size)\n\n\nmm\nin.\n \ncm3\nin.3\n18\n16\n14\n12\n10\n8\n6\n\n\n\n\n100 \u00d7 32\n(4 \u00d7 11/4)\nround/octagonal\n205\n12.5\n8\n7\n6\n5\n5\n4\n2\n\n\n100 \u00d7 38\n(4 \u00d7 11/2)\nround/octagonal\n254\n15.5\n10\n8\n7\n6\n6\n5\n3\n\n\n100 \u00d7 54\n(4 \u00d7 21/8)\nround/octagonal\n353\n21.5\n14\n12\n10\n9\n8\n7\n4\n\n\n100 \u00d7 32\n(4 \u00d7 11/4)\nsquare\n295\n18.0\n12\n10\n9\n8\n7\n6\n3\n\n\n100 \u00d7 38\n(4 \u00d7 11/2)\nsquare\n344\n21.0\n14\n12\n10\n9\n8\n7\n4\n\n\n100 \u00d7 54\n(4 \u00d7 21/8)\nsquare\n497\n30.3\n20\n17\n15\n13\n12\n10\n6\n\n\n120 \u00d7 32\n(411/16\u00d7 11/4)\nsquare\n418\n25.5\n17\n14\n12\n11\n10\n8\n5\n\n\n120 \u00d7 38\n(411/16\u00d7 11/2)\nsquare\n484\n29.5\n19\n16\n14\n13\n11\n9\n5\n\n\n120 \u00d7 54\n(411/16\u00d7 21/8)\nsquare\n689\n42.0\n28\n24\n21\n18\n16\n14\n8\n\n\n75 \u00d7 50 \u00d7 38\n(3 \u00d7 2 \u00d7 11/2)\ndevice\n123\n7.5\n5\n4\n3\n3\n3\n2\n1\n\n\n75 \u00d7 50 \u00d7 50\n(3 \u00d7 2 \u00d7 2)\ndevice\n164\n10.0\n6\n5\n5\n4\n4\n3\n2\n\n\n75 \u00d7 50 \u00d7 57\n(3 \u00d7 2 \u00d7 21/4)\ndevice\n172\n10.5\n7\n6\n5\n4\n4\n3\n2\n\n\n75 \u00d7 50 \u00d7 65\n(3 \u00d7 2 \u00d7 21/4)\ndevice\n205\n12.5\n8\n7\n6\n5\n5\n4\n2\n\n\n75 \u00d7 50 \u00d7 70\n(3 \u00d7 2 \u00d7 23/4)\ndevice\n230\n14.0\n9\n8\n7\n6\n5\n4\n2\n\n\n75 \u00d7 50 \u00d7 90\n(3 \u00d7 2 \u00d7 31/2)\ndevice\n295\n18.0\n12\n10\n9\n8\n7\n6\n3\n\n\n100 \u00d7 54 \u00d7 38\n(4 \u00d7 21/8 \u00d7 11/2)\ndevice\n169\n10.3\n6\n5\n5\n4\n4\n3\n2\n\n\n100 \u00d7 54 \u00d7 48\n(4 \u00d7 21/8 \u00d7 17/8)\ndevice\n213\n13.0\n8\n7\n6\n5\n5\n4\n2\n\n\n100 \u00d7 54 \u00d7 54\n(4 \u00d7 21/8 \u00d7 21/8)\ndevice\n238\n14.5\n9\n8\n7\n6\n5\n4\n2\n\n\n95 \u00d7 50 \u00d7 65\n(33/4 \u00d7 2 \u00d7 21/2)\nmasonry box/gang\n230\n14.0\n9\n8\n7\n6\n5\n4\n2\n\n\n95 \u00d7 50 \u00d7 90\n(33/4 \u00d7 2 \u00d7 31/2)\nmasonry box/gang\n344\n21.0\n14\n12\n10\n9\n8\n7\n4\n\n\nmin. 44.5 depth\nFS - single cover/gang (13/4)\n221\n13.5\n9\n7\n6\n6\n5\n4\n2\n\n\nmin. 60.3 depth\nFD - single cover/gang (23/8)\n295\n18.0\n12\n10\n9\n8\n7\n6\n3\n\n\nmin. 44.5 depth\nFS - multiple cover/gang (13/4)\n295\n18.0\n12\n10\n9\n8\n7\n6\n3\n\n\nmin. 60.3 depth\nFD - multiple cover/gang (23/8)\n395\n24.0\n16\n13\n12\n10\n9\n8\n4\n\n\n\n*Where no volume allowances are required by 314.16(B)(2) through (B)(6). [314.16_(A)](https://2023.antflix.net#314.16_(A))", + "displayTitle": "(A) Box Volume Calculations", + "children": [ + { + "body": "The volumes of standard boxes that are not marked with their volume shall be as given in Table 314.16(A). [314.16_(A)_(1)](https://2023.antflix.net#314.16_(A)_(1))", + "displayTitle": "(1) Standard Boxes", + "children": [], + "url": "https://2023.antflix.net#314.16_(A)_(1)" + }, + { + "body": "Boxes 1650 cm3 (100 in.3) or less, other than those described in Table 314.16(A), and nonmetallic boxes shall be durably and legibly marked by the manufacturer with their volume(s). Boxes described in Table 314.16(A) that have a volume larger than is designated in the table shall be permitted to have their volume marked as required by this section. [314.16_(A)_(2)](https://2023.antflix.net#314.16_(A)_(2))", + "displayTitle": "(2) Other Boxes", + "children": [], + "url": "https://2023.antflix.net#314.16_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#314.16_(A)" + }, + { + "body": "The volumes in 314.16(B)(1) through (B)(6), as applicable, shall be added together. No allowance shall be required for small fittings such as locknuts and bushings. Each space within a box installed with a barrier shall be calculated separately. [314.16_(B)](https://2023.antflix.net#314.16_(B))", + "displayTitle": "(B) Box Fill Calculations", + "children": [ + { + "body": "Each conductor that originates outside the box and terminates or is spliced within the box shall be counted once, and each conductor that passes through the box without splice or termination shall be counted once. Each loop or coil of unbroken conductor not less than twice the minimum length required for free conductors in 300.14 shall be counted twice. The conductor fill shall be calculated using Table 314.16(B)(1). A conductor, no part of which leaves the box, shall not be counted.\nException: An equipment grounding conductor or conductors or not over four fixture wires smaller than 14 AWG, or both, shall be permitted to be omitted from the calculations where they enter a box from a domed luminaire or similar canopy and terminate within that box.\nTable 314.16(B)(1) Volume Allowance Required per Conductor\n\n\n\nSize of Conductor (AWG)\nFree Space Within Box for Each Conductor\n\n\ncm3\nin.3\n\n\n\n\n18\n24.6\n1.50\n\n\n16\n28.7\n1.75\n\n\n14\n32.8\n2.00\n\n\n12\n36.9\n2.25\n\n\n10\n41.0\n2.50\n\n\n8\n49.2\n3.00\n\n\n6\n81.9\n5.00\n\n\n [314.16_(B)_(1)](https://2023.antflix.net#314.16_(B)_(1))", + "displayTitle": "(1) Conductor Fill", + "children": [], + "url": "https://2023.antflix.net#314.16_(B)_(1)" + }, + { + "body": "Where one or more internal cable clamps, whether factory or field supplied, are present in the box, a single volume allowance in accordance with Table 314.16(B)(1) shall be made based on the largest conductor present in the box. No allowance shall be required for a cable connector with its clamping mechanism outside the box. [314.16_(B)_(2)](https://2023.antflix.net#314.16_(B)_(2))", + "displayTitle": "(2) Clamp Fill", + "children": [], + "url": "https://2023.antflix.net#314.16_(B)_(2)" + }, + { + "body": "Where one or more luminaire studs or hickeys are present in the box, a single volume allowance in accordance with Table 314.16(B)(1) shall be made for each type of fitting based on the largest conductor present in the box. [314.16_(B)_(3)](https://2023.antflix.net#314.16_(B)_(3))", + "displayTitle": "(3) Support Fittings Fill", + "children": [], + "url": "https://2023.antflix.net#314.16_(B)_(3)" + }, + { + "body": "For each yoke or strap containing one or more devices or equipment, a double volume allowance in accordance with Table 314.16(B)(1) shall be made for each yoke or strap based on the largest conductor connected to a device(s) or equipment supported by that yoke or strap. A device or utilization equipment wider than a single 50 mm (2 in.) device box as described in Table 314.16(A) shall have double volume allowances provided for each gang required for mounting. [314.16_(B)_(4)](https://2023.antflix.net#314.16_(B)_(4))", + "displayTitle": "(4) Device or Equipment Fill", + "children": [], + "url": "https://2023.antflix.net#314.16_(B)_(4)" + }, + { + "body": "Where up to four equipment grounding conductors enter a box, a single volume allowance in accordance with Table 314.16(B)(1) shall be made based on the largest equipment grounding conductor entering the box. A 1/4 volume allowance shall be made for each additional equipment grounding conductor that enters the box, based on the largest equipment grounding conductor entering the box. [314.16_(B)_(5)](https://2023.antflix.net#314.16_(B)_(5))", + "displayTitle": "(5) Equipment Grounding Conductor Fill", + "children": [], + "url": "https://2023.antflix.net#314.16_(B)_(5)" + }, + { + "body": "Where a terminal block is present in a box, a single volume allowance in accordance with Table 314.16(B)(1) shall be made for each terminal block assembly based on the largest conductor(s) terminated to the assembly. [314.16_(B)_(6)](https://2023.antflix.net#314.16_(B)_(6))", + "displayTitle": "(6) Terminal Block Fill", + "children": [], + "url": "https://2023.antflix.net#314.16_(B)_(6)" + } + ], + "url": "https://2023.antflix.net#314.16_(B)" + }, + { + "displayTitle": "(C) Conduit Bodies", + "children": [ + { + "body": "Conduit bodies enclosing 6 AWG conductors or smaller, other than short-radius conduit bodies as described in 314.16(C)(3). shall have a cross-sectional area not less than twice the cross-sectional area of the largest conduit or tubing to which they can be attached. The maximum number of conductors permitted shall be the maximum number permitted by Table 1 of Chapter 9 for the conduit or tubing to which it is attached. [314.16_(C)_(1)](https://2023.antflix.net#314.16_(C)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#314.16_(C)_(1)" + }, + { + "body": "Only those conduit bodies that are durably and legibly marked by the manufacturer with their volume shall be permitted to contain splices, taps, or devices. The maximum number of conductors shall be calculated in accordance with 314.16(B). Conduit bodies shall be supported in a rigid and secure manner. [314.16_(C)_(2)](https://2023.antflix.net#314.16_(C)_(2))", + "displayTitle": "(2) With Splices, Taps, or Devices", + "children": [], + "url": "https://2023.antflix.net#314.16_(C)_(2)" + }, + { + "body": "Conduit bodies such as capped elbows and service-entrance elbows that enclose conductors 6 AWG or smaller, and are only intended to enable the installation of the raceway and the contained conductors, shall not contain splices, taps, or devices and shall be of an approved size to provide free space for all conductors enclosed in the conduit body. [314.16_(C)_(3)](https://2023.antflix.net#314.16_(C)_(3))", + "displayTitle": "(3) Short Radius Conduit Bodies", + "children": [], + "url": "https://2023.antflix.net#314.16_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#314.16_(C)" + } + ], + "url": "https://2023.antflix.net#314.16" + }, + { + "body": "Conductors entering boxes, conduit bodies, or fittings shall be protected from abrasion. Conductors and cables shall comply with 314.17(A) through (C). [314.17](https://2023.antflix.net#314.17)", + "displayTitle": "314.17 Conductors and Cables Entering Boxes, Conduit Bodies, or Fittings", + "children": [ + { + "body": "Openings through which conductors enter shall be closed in an approved manner. [314.17_(A)](https://2023.antflix.net#314.17_(A))", + "displayTitle": "(A) Openings to Be Closed", + "children": [], + "url": "https://2023.antflix.net#314.17_(A)" + }, + { + "body": "The installation of the conductors and cables in boxes and conduit bodies shall comply with 314.17(B)(1) through (B)(4). [314.17_(B)](https://2023.antflix.net#314.17_(B))", + "displayTitle": "(B) Boxes and Conduit Bodies", + "children": [ + { + "body": "For messenger-supported wiring, open wiring on insulators, or concealed knob-and-tube wiring, the conductors shall enter the box through individual holes. In installations where metal boxes or conduit bodies are used with conductors unprotected by flexible tubing, the individual openings shall be provided with insulating bushings. Where flexible tubing is used to enclose the conductors, the tubing shall extend from the last insulating support to not less than 6 mm (1/4 in.) inside the box or conduit body and 6 mm (1/4 in.) beyond the end of any cable clamp. The wiring method shall be secured to the box or conduit body. [314.17_(B)_(1)](https://2023.antflix.net#314.17_(B)_(1))", + "displayTitle": "(1) Conductors Entering Through Individual Holes or Through Flexible Tubing", + "children": [], + "url": "https://2023.antflix.net#314.17_(B)_(1)" + }, + { + "body": "Where cable assemblies with nonmetallic sheaths are used, the sheath shall extend not less than 6 mm (1/4 in.) inside the box and 6 mm (1/4 in.) beyond the end of any cable clamp. Except as covered in 300.15(C), the wiring method shall be secured to the box or conduit body. Exception: Where nonmetallic-sheathed cable is used with single gang nonmetallic boxes not larger than a nominal size 57 mm \u00d7 100 mm (21/4 in. \u00d7 4 in.) mounted in walls or ceilings, and where the cable is fastened within 200 mm (8 in.) of the box measured along the sheath and where the sheath extends through a cable knockout not less than 6 mm (1/4 in.), securing the cable to the box shall not be required. Multiple cable entries shall be permitted in a single cable knockout opening. [314.17_(B)_(2)](https://2023.antflix.net#314.17_(B)_(2))", + "displayTitle": "(2) Cables Entering Through Cable Clamps", + "children": [], + "url": "https://2023.antflix.net#314.17_(B)_(2)" + }, + { + "body": "Where the raceway is complete between boxes, conduit bodies, or both and encloses individual conductors or nonmetallic cable assemblies or both, the conductors or cable assemblies shall not be required to be additionally secured. Where raceways enclose cable assemblies as covered in 300.15(C), the cable assembly shall not be required to be additionally secured within the box or conduit body. [314.17_(B)_(3)](https://2023.antflix.net#314.17_(B)_(3))", + "displayTitle": "(3) Conductors and Cables Entering Through Raceways", + "children": [], + "url": "https://2023.antflix.net#314.17_(B)_(3)" + }, + { + "body": "Nonmetallic boxes and conduit bodies shall be suitable for the lowest temperature-rated conductor entering the box or conduit body. [314.17_(B)_(4)](https://2023.antflix.net#314.17_(B)_(4))", + "displayTitle": "(4) Temperature Limitation", + "children": [], + "url": "https://2023.antflix.net#314.17_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#314.17_(B)" + }, + { + "body": "Installation shall comply with 300.4(G). Informational Note: See 110.12(A) for requirements on closing unused cable and raceway knockout openings. [314.17_(C)](https://2023.antflix.net#314.17_(C))", + "displayTitle": "(C) Conductors 4 AWG or Larger", + "children": [], + "url": "https://2023.antflix.net#314.17_(C)" + } + ], + "url": "https://2023.antflix.net#314.17" + }, + { + "body": "Boxes used to enclose flush devices or flush equipment shall be of such design that the devices or equipment will be completely enclosed on the back and sides, and substantial support for the devices or equipment will be provided. Screws for supporting the box shall not also be used to attach a device or equipment. [314.19](https://2023.antflix.net#314.19)", + "displayTitle": "314.19 Boxes Enclosing Flush Devices or Flush Equipment", + "children": [], + "url": "https://2023.antflix.net#314.19" + }, + { + "body": "Installations within or behind a surface of concrete, tile, gypsum, plaster, or other noncombustible material, including boxes employing a flush-type cover or faceplate, shall be made so that the front edge of the box, plaster ring, extension ring, or listed extender will not be set back of the finished surface more than 6 mm (1/4 in.). Installations within a surface of wood or other combustible surface material, boxes, plaster rings, extension rings, or listed extenders shall extend to the finished surface or project therefrom. [314.20](https://2023.antflix.net#314.20)", + "displayTitle": "314.20 Flush-Mounted Installations", + "children": [], + "url": "https://2023.antflix.net#314.20" + }, + { + "body": "Noncombustible surfaces that are broken or incomplete around boxes employing a flush-type cover or faceplate shall be repaired so there will be no gaps or open spaces greater than 3 mm (1/8 in.) at the edge of the box. [314.21](https://2023.antflix.net#314.21)", + "displayTitle": "314.21 Repairing Noncombustible Surfaces", + "children": [], + "url": "https://2023.antflix.net#314.21" + }, + { + "body": "Surface extensions shall be made by mounting and mechanically securing an extension ring over the box. Equipment grounding shall be in accordance with Part VI of Article 250. Exception: A surface extension shall be permitted to be made from the cover of a box where the cover is designed so it is unlikely to fall off or be removed if its securing means becomes loose. The wiring method shall be flexible for an approved length that permits removal of the cover and provides access to the box interior and shall be arranged so that any grounding continuity is independent of the connection between the box and cover. [314.22](https://2023.antflix.net#314.22)", + "displayTitle": "314.22 Surface Extensions", + "children": [], + "url": "https://2023.antflix.net#314.22" + }, + { + "body": "Enclosures within the scope of this article shall be supported in accordance with 314.23(A) through (H) as applicable. [314.23](https://2023.antflix.net#314.23)", + "displayTitle": "314.23 Supports", + "children": [ + { + "body": "An enclosure mounted on a building or other surface shall be rigidly and securely fastened in place. If the surface does not provide rigid and secure support, additional support in accordance with this section shall be provided. [314.23_(A)](https://2023.antflix.net#314.23_(A))", + "displayTitle": "(A) Surface Mounting", + "children": [], + "url": "https://2023.antflix.net#314.23_(A)" + }, + { + "body": "An enclosure supported from a structural member or from grade shall be rigidly supported either directly or by using a metal, polymeric, or wood brace. [314.23_(B)](https://2023.antflix.net#314.23_(B))", + "displayTitle": "(B) Structural Mounting", + "children": [ + { + "body": "Nails and screws, where used as a fastening means, shall secure boxes by using brackets on the outside of the enclosure, or by using mounting holes in the back or in one or more sides of the enclosure, or they shall pass through the interior within 6 mm (1/4 in.) of the back or ends of the enclosure. Screws shall not be permitted to pass through the box unless exposed threads in the box are protected using approved means to avoid abrasion of conductor insulation. Mounting holes made in the field shall be approved. [314.23_(B)_(1)](https://2023.antflix.net#314.23_(B)_(1))", + "displayTitle": "(1) Nails and Screws", + "children": [], + "url": "https://2023.antflix.net#314.23_(B)_(1)" + }, + { + "body": "Metal braces shall be protected against corrosion and formed from metal that is not less than 0.51 mm (0.020 in.) thick uncoated. Wood braces shall have a cross section not less than nominal 25 mm \u00d7 50 mm (1 in. \u00d7 2 in.). Wood braces in wet locations shall be treated for the conditions. Polymeric braces shall be identified as being suitable for the use. [314.23_(B)_(2)](https://2023.antflix.net#314.23_(B)_(2))", + "displayTitle": "(2) Braces", + "children": [], + "url": "https://2023.antflix.net#314.23_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#314.23_(B)" + }, + { + "body": "An enclosure mounted in a finished surface shall be rigidly secured thereto by clamps, anchors, or fittings identified for the application. [314.23_(C)](https://2023.antflix.net#314.23_(C))", + "displayTitle": "(C) Mounting in Finished Surfaces", + "children": [], + "url": "https://2023.antflix.net#314.23_(C)" + }, + { + "body": "An enclosure mounted to structural or supporting elements of a suspended ceiling shall be not more than 1650 cm3 (100 in.3) in size and shall be securely fastened in place in accordance with either 314.23(D)(1) or (D)(2). [314.23_(D)](https://2023.antflix.net#314.23_(D))", + "displayTitle": "(D) Suspended Ceilings", + "children": [ + { + "body": "An enclosure shall be fastened to the framing members by mechanical means such as bolts, screws, or rivets, or by the use of clips or other securing means identified for use with the type of ceiling framing member(s) and enclosure(s) employed. The framing members shall be supported in an approved manner and securely fastened to each other and to the building structure. [314.23_(D)_(1)](https://2023.antflix.net#314.23_(D)_(1))", + "displayTitle": "(1) Framing Members", + "children": [], + "url": "https://2023.antflix.net#314.23_(D)_(1)" + }, + { + "body": "The installation shall comply with 300.11(B). The enclosure shall be secured, using identified methods, to ceiling support wire(s), including any additional support wire(s) installed for ceiling support. Support wire(s) used for enclosure support shall be fastened at each end so as to be taut within the ceiling cavity. [314.23_(D)_(2)](https://2023.antflix.net#314.23_(D)_(2))", + "displayTitle": "(2) Support Wires", + "children": [], + "url": "https://2023.antflix.net#314.23_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#314.23_(D)" + }, + { + "body": "An enclosure that does not contain a device(s), other than splicing devices, or supports a luminaire(s), a lampholder, or other equipment and is supported by entering raceways shall not exceed 1650 cm3 (100 in.3) in size. It shall have threaded entries or identified hubs. It shall be supported by two or more conduits threaded wrenchtight into the enclosure or hubs. Each conduit shall be secured within 900 mm (3 ft) of the enclosure, or within 450 mm (18 in.) of the enclosure if all conduit entries are on the same side. Exception: The following wiring methods shall be permitted to support a conduit body of any size, including a conduit body constructed with only one conduit entry, provided that the trade size of the conduit body is not larger than the largest trade size of the conduit or tubing: (1) Intermediate metal conduit, IMC (2) Rigid metal conduit, RMC (3) Rigid polyvinyl chloride conduit, PVC (4) Reinforced thermosetting resin conduit, RTRC (5) Electrical metallic tubing, EMT [314.23_(E)](https://2023.antflix.net#314.23_(E))", + "displayTitle": "(E) Raceway-Supported Enclosure, Without Devices, Luminaires, or Lampholders", + "children": [], + "url": "https://2023.antflix.net#314.23_(E)" + }, + { + "body": "An enclosure that contains a device(s), other than splicing devices, or supports a luminaire(s), a lampholder, or other equipment and is supported by entering raceways shall not exceed 1650 cm3 (100 in.3) in size. It shall have threaded entries or identified hubs. It shall be supported by two or more conduits threaded wrenchtight into the enclosure or hubs. Each conduit shall be secured within 450 mm (18 in.) of the enclosure. Exception No. 1: Rigid metal or intermediate metal conduit shall be permitted to support a conduit body of any size, including a conduit body constructed with only one conduit entry, provided the trade size of the conduit body is not larger than the largest trade size of the conduit. Exception No. 2: An unbroken length(s) of rigid or intermediate metal conduit shall be permitted to support a box used for luminaire or lampholder support, or to support a wiring enclosure that is an integral part of a luminaire and used in lieu of a box in accordance with 300.15(B), where all of the following conditions are met: (1) The conduit is securely fastened at a point so that the length of conduit beyond the last point of conduit support does not exceed 900 mm (3 ft). (2) The unbroken conduit length before the last point of conduit support is 300 mm (12 in.) or greater, and that portion of the conduit is securely fastened at some point not less than 300 mm (12 in.) from its last point of support. (3) Where accessible to unqualified persons, the luminaire or lampholder, measured to its lowest point, is at least 2.5 m (8 ft) above grade or standing area and at least 900 mm (3 ft) measured horizontally to the 2.5 m (8 ft) elevation from windows, doors, porches, fire escapes, or similar locations. (4) A luminaire supported by a single conduit does not exceed 300 mm (12 in.) in any direction from the point of conduit entry. (5) The weight supported by any single conduit does not exceed 9 kg (20 lb). (6) At the luminaire or lampholder end, the conduit(s) is threaded wrenchtight into the box, conduit body, integral wiring enclosure, or identified hubs. Where, a box or conduit body is used for support, the luminaire shall be secured directly to the box or conduit body, or through a threaded conduit nipple not over 75 mm (3 in.) long. [314.23_(F)](https://2023.antflix.net#314.23_(F))", + "displayTitle": "(F) Raceway-Supported Enclosures, With Devices, Luminaires, or Lampholders", + "children": [], + "url": "https://2023.antflix.net#314.23_(F)" + }, + { + "body": "An enclosure supported by embedment shall be identified as suitably protected from corrosion and securely embedded in concrete or masonry. [314.23_(G)](https://2023.antflix.net#314.23_(G))", + "displayTitle": "(G) Enclosures in Concrete or Masonry", + "children": [], + "url": "https://2023.antflix.net#314.23_(G)" + }, + { + "body": "An enclosure supported by a pendant shall comply with 314.23(H)(1) or (H)(2). [314.23_(H)](https://2023.antflix.net#314.23_(H))", + "displayTitle": "(H) Pendant Boxes", + "children": [ + { + "body": "A box shall be supported from a multiconductor cord or cable in an approved manner that protects the conductors against strain. A connection to a box equipped with a hub shall be made with a listed cord grip attachment fitting marked for use with a threaded hub. [314.23_(H)_(1)](https://2023.antflix.net#314.23_(H)_(1))", + "displayTitle": "(1) Flexible Cord", + "children": [], + "url": "https://2023.antflix.net#314.23_(H)_(1)" + }, + { + "body": "A box supporting lampholders or luminaires, or wiring enclosures within luminaires used in lieu of boxes in accordance with 300.15(B), shall be supported by rigid or intermediate metal conduit stems. For stems longer than 450 mm (18 in.), the stems shall be connected to the wiring system with listed swivel hangers suitable for the location. At the luminaire end, the conduit(s) shall be threaded wrenchtight into the box, wiring enclosure, or identified hubs. Where supported by only a single conduit, the threaded joints shall be prevented from loosening by the use of setscrews or other effective means, or the luminaire, at any point, shall be at least 2.5 m (8 ft) above grade or standing area and at least 900 mm (3 ft) measured horizontally to the 2.5 m (8 ft) elevation from windows, doors, porches, fire escapes, or similar locations. A luminaire supported by a single conduit shall not exceed 300 mm (12 in.) in any horizontal direction from the point of conduit entry. [314.23_(H)_(2)](https://2023.antflix.net#314.23_(H)_(2))", + "displayTitle": "(2) Conduit", + "children": [], + "url": "https://2023.antflix.net#314.23_(H)_(2)" + } + ], + "url": "https://2023.antflix.net#314.23_(H)" + } + ], + "url": "https://2023.antflix.net#314.23" + }, + { + "body": "Outlet and device boxes shall have approved dimensions to allow equipment installed within them to be mounted properly and without likelihood of damage to conductors within the box. [314.24](https://2023.antflix.net#314.24)", + "displayTitle": "314.24 Dimensions of Boxes", + "children": [ + { + "body": "Outlet boxes that do not enclose devices or utilization equipment shall have a minimum internal depth of 12.7 mm (1/2 in.). [314.24_(A)](https://2023.antflix.net#314.24_(A))", + "displayTitle": "(A) Depth of Outlet Boxes Without Enclosed Devices or Utilization Equipment", + "children": [], + "url": "https://2023.antflix.net#314.24_(A)" + }, + { + "body": "Outlet and device boxes that enclose devices or utilization equipment shall have a minimum internal depth that accommodates the rearward projection of the equipment and the size of the conductors that supply the equipment. The internal depth shall include, where used, that of any extension boxes, plaster rings, or raised covers. The internal depth shall comply with 314.24(B)(1) through (B)(5) as applicable. [314.24_(B)](https://2023.antflix.net#314.24_(B))", + "displayTitle": "(B) Depth of Outlet and Device Boxes With Enclosed Devices or Utilization Equipment", + "children": [ + { + "body": "Boxes that enclose devices or utilization equipment that projects more than 48 mm (17/8 in.) rearward from the mounting plane of the box shall have a depth that is not less than the depth of the equipment plus 6 mm (1/4 in.). [314.24_(B)_(1)](https://2023.antflix.net#314.24_(B)_(1))", + "displayTitle": "(1) Large Equipment", + "children": [], + "url": "https://2023.antflix.net#314.24_(B)_(1)" + }, + { + "body": "Boxes that enclose devices or utilization equipment supplied by conductors larger than 4 AWG shall be identified for their specific function. Exception: Devices or utilization equipment supplied by conductors larger than 4 AWG shall be permitted to be mounted on or in junction and pull boxes larger than 1650 cm3 (100 in.3) if the spacing at the terminals meets the requirements of 312.6. [314.24_(B)_(2)](https://2023.antflix.net#314.24_(B)_(2))", + "displayTitle": "(2) Conductors Larger Than 4 AWG", + "children": [], + "url": "https://2023.antflix.net#314.24_(B)_(2)" + }, + { + "body": "Boxes that enclose devices or utilization equipment supplied by 8, 6, or 4 AWG conductors shall have an internal depth that is not less than 52.4 mm (21/16 in.). [314.24_(B)_(3)](https://2023.antflix.net#314.24_(B)_(3))", + "displayTitle": "(3) Conductors 8, 6, or 4 AWG", + "children": [], + "url": "https://2023.antflix.net#314.24_(B)_(3)" + }, + { + "body": "Boxes that enclose devices or utilization equipment supplied by 12 or 10 AWG conductors shall have an internal depth that is not less than 30.2 mm (13/16 in.). Where the equipment projects rearward from the mounting plane of the box by more than 25 mm (1 in.), the box shall have a depth not less than that of the equipment plus 6 mm (1/4 in.). Where wiring enters the center portion of the rear of a box opposite to the equipment, the minimum clearance shall be increased to 13 mm (1/2 in.) [314.24_(B)_(4)](https://2023.antflix.net#314.24_(B)_(4))", + "displayTitle": "(4) Conductors 12 or 10 AWG", + "children": [], + "url": "https://2023.antflix.net#314.24_(B)_(4)" + }, + { + "body": "Boxes that enclose devices or utilization equipment supplied by 14 AWG or smaller conductors shall have a depth that is not less than 23.8 mm (15/16 in.). Exception: Under any of the conditions specified in 314.24(B)(1) through (B)(5), devices or utilization equipment that is listed to be installed with specified boxes shall be permitted. [314.24_(B)_(5)](https://2023.antflix.net#314.24_(B)_(5))", + "displayTitle": "(5) Conductors 14 AWG and Smaller", + "children": [], + "url": "https://2023.antflix.net#314.24_(B)_(5)" + } + ], + "url": "https://2023.antflix.net#314.24_(B)" + }, + { + "body": "Where devices or equipment are mounted in boxes having side-wiring entries, the conductors entering from the side shall be protected as covered in (1) or (2), as follows. The term side applies to any wall of a box other than the one opposite to the opening. The rearward projection of the device or equipment shall not extend beyond the centerline of the wiring knockout or other entry.The clearance from the box wall to the installed device or equipment shall be not less than 13 mm (1/2 in.). [314.24_(C)](https://2023.antflix.net#314.24_(C))", + "displayTitle": "(C) Clearances for Side-Wiring Entrances", + "children": [], + "url": "https://2023.antflix.net#314.24_(C)" + } + ], + "url": "https://2023.antflix.net#314.24" + }, + { + "body": "In completed installations, each box shall have a cover, faceplate, lampholder, or luminaire canopy, except where the installation complies with 410.24(B). Conduit body enclosures shall be installed with a cover, lampholder, or device. Screws used for the purpose of attaching covers, or other equipment, to the box shall be either machine screws matching the thread gauge and size that is integral to the box or shall be in accordance with the manufacturer's instructions. [314.25](https://2023.antflix.net#314.25)", + "displayTitle": "314.25 Covers and Canopies", + "children": [ + { + "body": "Nonmetallic or metal covers and plates shall be permitted. Where metal covers or plates are used, they shall be connected to the equipment grounding conductor in accordance with 250.110. Informational Note: See 410.42 for metal luminaire canopies and 404.12 and 406.6(B) for metal faceplates for additional grounding requirements. [314.25_(A)](https://2023.antflix.net#314.25_(A))", + "displayTitle": "(A) Nonmetallic or Metal Covers and Plates", + "children": [], + "url": "https://2023.antflix.net#314.25_(A)" + }, + { + "body": "Where a luminaire canopy or pan is used, any combustible wall or ceiling finish exposed between the edge of the canopy or pan and the outlet box shall be covered with noncombustible material if required by 410.23. [314.25_(B)](https://2023.antflix.net#314.25_(B))", + "displayTitle": "(B) Exposed Combustible Wall or Ceiling Finish", + "children": [], + "url": "https://2023.antflix.net#314.25_(B)" + }, + { + "body": "Covers of outlet boxes and conduit bodies having holes through which flexible cord pendants pass shall be provided with identified bushings or shall have smooth, well-rounded surfaces on which the cords can bear. So-called hard rubber or composition bushings shall not be used. [314.25_(C)](https://2023.antflix.net#314.25_(C))", + "displayTitle": "(C) Flexible Cord Pendants", + "children": [], + "url": "https://2023.antflix.net#314.25_(C)" + } + ], + "url": "https://2023.antflix.net#314.25" + }, + { + "displayTitle": "314.27 Outlet Boxes", + "children": [ + { + "body": "Outlet boxes or fittings designed for the support of luminaires and lampholders, and installed as required by 314.23, shall be permitted to support a luminaire or lampholder. [314.27_(A)](https://2023.antflix.net#314.27_(A))", + "displayTitle": "(A) Boxes at Luminaire or Lampholder Outlets", + "children": [ + { + "body": "Boxes used at luminaire or lampholder outlets in or on a vertical surface shall be identified and marked on the interior of the box to indicate the maximum weight of the luminaire that is permitted to be supported by the box if other than 23 kg (50 lb). Exception: A vertically mounted luminaire or lampholder weighing not more than 3 kg (6 lb) shall be permitted to be supported on other boxes or plaster rings that are secured to other boxes, provided that the luminaire or its supporting yoke, or the lampholder, is secured to the box with no fewer than two No. 6 or larger screws. [314.27_(A)_(1)](https://2023.antflix.net#314.27_(A)_(1))", + "displayTitle": "(1) Vertical Surface Outlets", + "children": [], + "url": "https://2023.antflix.net#314.27_(A)_(1)" + }, + { + "body": "At every outlet used exclusively for lighting, the box shall be designed or installed so that a luminaire or lampholder can be attached. Boxes shall be required to support a luminaire weighing a minimum of 23 kg (50 lb). A luminaire that weighs more than 23 kg (50 lb) shall be supported independently of the outlet box, unless the outlet box is listed for not less than the weight to be supported. The interior of the box shall be marked by the manufacturer to indicate the maximum weight the box shall be permitted to support. [314.27_(A)_(2)](https://2023.antflix.net#314.27_(A)_(2))", + "displayTitle": "(2) Ceiling Outlets", + "children": [], + "url": "https://2023.antflix.net#314.27_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#314.27_(A)" + }, + { + "body": "Boxes listed specifically for this application shall be used for receptacles located in the floor. Exception: Where the authority having jurisdiction judges them free from likely exposure to physical damage, moisture, and dirt, boxes located in elevated floors of show windows and similar locations shall be permitted to be other than those listed for floor applications. Receptacles and covers shall be listed as an assembly for this type of location. [314.27_(B)](https://2023.antflix.net#314.27_(B))", + "displayTitle": "(B) Floor Boxes", + "children": [], + "url": "https://2023.antflix.net#314.27_(B)" + }, + { + "body": "Outlet boxes or outlet box systems used as the sole support of a ceiling-suspended (paddle) fan shall be listed, shall be marked by their manufacturer on the interior of the box as suitable for this purpose, and shall not support ceiling-suspended (paddle) fans that weigh more than 32 kg (70 lb). For outlet boxes or outlet box systems designed to support ceiling-suspended (paddle) fans that weigh more than 16 kg (35 lb), the required marking shall include the maximum weight to be supported. Outlet boxes mounted in the ceilings of habitable rooms of dwelling occupancies in a location acceptable for the installation of a ceiling-suspended (paddle) fan shall comply with one of the following:Listed for the sole support of ceiling-suspended (paddle) fansInstalled so as to allow direct access through the box to structural framing capable of supporting a ceiling-suspended (paddle) fan without removing the box [314.27_(C)](https://2023.antflix.net#314.27_(C))", + "displayTitle": "(C) Boxes at Ceiling-Suspended (Paddle) Fan Outlets", + "children": [], + "url": "https://2023.antflix.net#314.27_(C)" + }, + { + "body": "Boxes used for the support of utilization equipment other than ceiling-suspended (paddle) fans shall meet the requirements of 314.27(A) for the support of a luminaire that is the same size and weight. Exception: Utilization equipment weighing not more than 3 kg (6 lb) shall be permitted to be supported on other boxes or plaster rings that are secured to other boxes, provided the equipment or its supporting yoke is secured to the box with no fewer than two No. 6 or larger screws. [314.27_(D)](https://2023.antflix.net#314.27_(D))", + "displayTitle": "(D) Utilization Equipment", + "children": [], + "url": "https://2023.antflix.net#314.27_(D)" + }, + { + "body": "Outlet boxes required in 314.27 shall be permitted to support listed weight-supporting ceiling receptacles (WSCR). A WSCR shall be used in combination with compatible weight-supporting attachment fittings (WSAF) that are identified for the support of equipment within the weight and mounting orientation limits of the listing. Where the WSCR is installed, it shall be included in the box fill calculation covered in 314.16(B)(4). Listed WSCR used in combination with compatible WSAF shall be permitted to be installed in outlet boxes for the sole support of ceiling-suspended (paddle) fans, in accordance with 314.27(C). Informational Note: See ANSI/NEMA WD-6, American National Standard for Wiring Devices\u2014Dimensional Specifications, for standard configurations of weight-supporting ceiling receptacles and weight-supporting attachment fittings. [314.27_(E)](https://2023.antflix.net#314.27_(E))", + "displayTitle": "(E) Weight-Supporting Ceiling Receptacles (WSCR) and Weight-Supporting Attachment Fittings (WSAF)", + "children": [], + "url": "https://2023.antflix.net#314.27_(E)" + } + ], + "url": "https://2023.antflix.net#314.27" + }, + { + "body": "Boxes and conduit bodies used as pull or junction boxes shall comply with 314.28(A) through (E). Exception: Terminal housings supplied with motors shall comply with the provisions of 430.12. [314.28](https://2023.antflix.net#314.28)", + "displayTitle": "314.28 Pull and Junction Boxes and Conduit Bodies", + "children": [ + { + "body": "For raceways containing conductors of 4 AWG or larger that are required to be insulated, and for cables containing conductors of 4 AWG or larger, the minimum dimensions of pull or junction boxes installed in a raceway or cable run shall comply with 314.28(A)(1) through (A)(3). Where an enclosure dimension is to be calculated based on the diameter of entering raceways, the diameter shall be the metric designator (trade size) expressed in the units of measurement employed. [314.28_(A)](https://2023.antflix.net#314.28_(A))", + "displayTitle": "(A) Minimum Size", + "children": [ + { + "body": "In straight pulls, the length of the box or conduit body shall not be less than eight times the metric designator (trade size) of the largest raceway. [314.28_(A)_(1)](https://2023.antflix.net#314.28_(A)_(1))", + "displayTitle": "(1) Straight Pulls", + "children": [], + "url": "https://2023.antflix.net#314.28_(A)_(1)" + }, + { + "body": "Where splices or where angle or U pulls are made, the distance between each raceway entry inside the box or conduit body and the opposite wall of the box or conduit body shall not be less than six times the metric designator (trade size) of the largest raceway in a row. This distance shall be increased for additional entries by the amount of the sum of the diameters of all other raceway entries in the same row on the same wall of the box. Each row shall be calculated individually, and the single row that provides the maximum distance shall be used. Exception: Where a raceway or cable entry is in the wall of a box or conduit body opposite a removable cover, the distance from that wall to the cover shall be permitted to comply with the distance required for one wire per terminal in Table 312.6(A). The distance between raceway entries enclosing the same conductor shall not be less than six times the metric designator (trade size) of the larger raceway. When transposing cable size into raceway size in 314.28(A)(1) and (A)(2), the minimum metric designator (trade size) raceway required for the number and size of conductors in the cable shall be used. [314.28_(A)_(2)](https://2023.antflix.net#314.28_(A)_(2))", + "displayTitle": "(2) Angle or U Pulls, or Splices", + "children": [], + "url": "https://2023.antflix.net#314.28_(A)_(2)" + }, + { + "body": "Listed boxes or listed conduit bodies of dimensions less than those required in 314.28(A)(1) and (A)(2) shall be permitted for installations of combinations of conductors that are less than the maximum conduit or tubing fill (of conduits or tubing being used) permitted by Table 1 of Chapter 9. Listed conduit bodies of dimensions less than those required in 314.28(A)(2), and having a radius of the curve to the centerline not less than that indicated in Table 2 of Chapter 9 for one-shot and full-shoe benders, shall be permitted for installations of combinations of conductors permitted by Table 1 of Chapter 9. These conduit bodies shall be marked to show they have been specifically evaluated in accordance with this provision. Where the permitted combinations of conductors for which the box or conduit body has been listed are less than the maximum conduit or tubing fill permitted by Table 1 of Chapter 9, the box or conduit body shall be permanently marked with the maximum number and maximum size of conductors permitted. For other conductor sizes and combinations, the total cross-sectional area of the fill shall not exceed the cross-sectional area of the conductors specified in the marking, based on the type of conductor identified as part of the product listing. Informational Note: Unless otherwise specified, the applicable product standards evaluate the fill markings covered here based on conductors with Type XHHW insulation. [314.28_(A)_(3)](https://2023.antflix.net#314.28_(A)_(3))", + "displayTitle": "(3) Smaller Dimensions", + "children": [], + "url": "https://2023.antflix.net#314.28_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#314.28_(A)" + }, + { + "body": "In pull boxes or junction boxes having any dimension over 1.8 m (6 ft), all conductors shall be cabled or racked up in an approved manner. [314.28_(B)](https://2023.antflix.net#314.28_(B))", + "displayTitle": "(B) Conductors in Pull or Junction Boxes", + "children": [], + "url": "https://2023.antflix.net#314.28_(B)" + }, + { + "body": "All pull boxes, junction boxes, and conduit bodies shall be provided with covers compatible with the box or conduit body construction and suitable for the conditions of use. Where used, metal covers shall comply with the grounding requirements of 250.110. [314.28_(C)](https://2023.antflix.net#314.28_(C))", + "displayTitle": "(C) Covers", + "children": [], + "url": "https://2023.antflix.net#314.28_(C)" + }, + { + "body": "Where permanent barriers are installed in a box, each section shall be considered as a separate box. [314.28_(D)](https://2023.antflix.net#314.28_(D))", + "displayTitle": "(D) Permanent Barriers", + "children": [], + "url": "https://2023.antflix.net#314.28_(D)" + }, + { + "body": "Power distribution blocks shall be permitted in pull and junction boxes over 1650 cm3 (100 in.3) for connections of conductors where installed in boxes and where the installation complies with 314.28(E)(1) through (E)(5). Exception: Equipment grounding terminal bars shall be permitted in smaller enclosures. [314.28_(E)](https://2023.antflix.net#314.28_(E))", + "displayTitle": "(E) Power Distribution Blocks", + "children": [ + { + "body": "Power distribution blocks installed in boxes shall be listed. [314.28_(E)_(1)](https://2023.antflix.net#314.28_(E)_(1))", + "displayTitle": "(1) Installation", + "children": [], + "url": "https://2023.antflix.net#314.28_(E)_(1)" + }, + { + "body": "In addition to the overall size requirement in the first sentence of 314.28(A)(2), the power distribution block shall be installed in a box with dimensions not smaller than specified in the installation instructions of the power distribution block. [314.28_(E)_(2)](https://2023.antflix.net#314.28_(E)_(2))", + "displayTitle": "(2) Size", + "children": [], + "url": "https://2023.antflix.net#314.28_(E)_(2)" + }, + { + "body": "Wire bending space at the terminals of power distribution blocks shall comply with 312.6. [314.28_(E)_(3)](https://2023.antflix.net#314.28_(E)_(3))", + "displayTitle": "(3) Wire Bending Space", + "children": [], + "url": "https://2023.antflix.net#314.28_(E)_(3)" + }, + { + "body": "Power distribution blocks shall not have uninsulated live parts exposed within a box, whether or not the box cover is installed. [314.28_(E)_(4)](https://2023.antflix.net#314.28_(E)_(4))", + "displayTitle": "(4) Live Parts", + "children": [], + "url": "https://2023.antflix.net#314.28_(E)_(4)" + }, + { + "body": "Where the pull or junction boxes are used for conductors that do not terminate on the power distribution block(s), the through conductors shall be arranged so the power distribution block terminals are unobstructed following installation. [314.28_(E)_(5)](https://2023.antflix.net#314.28_(E)_(5))", + "displayTitle": "(5) Through Conductors", + "children": [], + "url": "https://2023.antflix.net#314.28_(E)_(5)" + } + ], + "url": "https://2023.antflix.net#314.28_(E)" + } + ], + "url": "https://2023.antflix.net#314.28" + }, + { + "body": "Boxes, conduit bodies, and handhole enclosures shall be installed so that wiring and devices contained in the boxes, conduit bodies, or handhole enclosures can be rendered accessible in accordance with 314.29(A) and (B). [314.29](https://2023.antflix.net#314.29)", + "displayTitle": "314.29 Boxes, Conduit Bodies, and Handhole Enclosures to Be Accessible", + "children": [ + { + "body": "Boxes and conduit bodies shall be installed so the contained wiring and devices are accessible. [314.29_(A)](https://2023.antflix.net#314.29_(A))", + "displayTitle": "(A) In Buildings and Other Structures", + "children": [], + "url": "https://2023.antflix.net#314.29_(A)" + }, + { + "body": "Underground boxes and handhole enclosures shall be installed so they are accessible without excavating sidewalks, paving, earth, or other substance that is to be used to establish the finished grade. Exception: Listed boxes and handhole enclosures shall be permitted where covered by gravel, light aggregate, or noncohesive granulated soil if their location is effectively described and accessible for excavation. The location description shall be available to those authorized to access, maintain, or inspect the wiring. [314.29_(B)](https://2023.antflix.net#314.29_(B))", + "displayTitle": "(B) Underground", + "children": [], + "url": "https://2023.antflix.net#314.29_(B)" + } + ], + "url": "https://2023.antflix.net#314.29" + }, + { + "body": "Handhole enclosures shall be designed and installed to withstand all loads likely to be imposed on them. They shall be identified for use in underground systems. Informational Note: See ANSI/SCTE 77-2013, Specification for Underground Enclosure Integrity, for additional information on deliberate and nondeliberate traffic loading that can be expected to bear on underground enclosures. [314.30](https://2023.antflix.net#314.30)", + "displayTitle": "314.30 Handhole Enclosures", + "children": [ + { + "body": "Handhole enclosures shall be sized in accordance with 314.28(A) for conductors operating at 1000 volts or below, and in accordance with 314.71 for conductors operating at over 1000 volts. For handhole enclosures without bottoms where the provisions of 314.28(A)(2), Exception, or 314.71(B)(1), Exception No. 1, apply, the measurement to the removable cover shall be taken from the end of the conduit or cable assembly. [314.30_(A)](https://2023.antflix.net#314.30_(A))", + "displayTitle": "(A) Size", + "children": [], + "url": "https://2023.antflix.net#314.30_(A)" + }, + { + "body": "Underground raceways and cable assemblies entering a handhole enclosure shall extend into the enclosure, but they shall not be required to be mechanically connected to the enclosure. [314.30_(B)](https://2023.antflix.net#314.30_(B))", + "displayTitle": "(B) Wiring Entries", + "children": [], + "url": "https://2023.antflix.net#314.30_(B)" + }, + { + "body": "All enclosed conductors and any splices or terminations, if present, shall be listed as suitable for wet locations. [314.30_(C)](https://2023.antflix.net#314.30_(C))", + "displayTitle": "(C) Enclosed Wiring", + "children": [], + "url": "https://2023.antflix.net#314.30_(C)" + }, + { + "body": "Handhole enclosure covers shall have an identifying mark or logo that prominently identifies the function of the enclosure, such as \"electric.\" Handhole enclosure covers shall require the use of tools to open, or they shall weigh over 45 kg (100 lb). Metal covers and other exposed conductive surfaces shall be bonded in accordance with 250.92 if the conductors in the handhole are service conductors, or in accordance with 250.96(A) if the conductors in the handhole are feeder or branch-circuit conductors. [314.30_(D)](https://2023.antflix.net#314.30_(D))", + "displayTitle": "(D) Covers", + "children": [], + "url": "https://2023.antflix.net#314.30_(D)" + } + ], + "url": "https://2023.antflix.net#314.30" + }, + { + "displayTitle": "Part III Pull and Junction Boxes, Conduit Bodies, and Handhole Enclosures for Use on Systems Over 1000 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#divider_9_III" + }, + { + "displayTitle": "314.70 General", + "children": [ + { + "body": "Where pull and junction boxes are used on systems over 1000 volts, the installation shall comply with Part III and with the following general provisions of this article: Part I, 314.2, 314.3, 314.4, and 314.5Part II, 314.15; 314.17; 314.20; 314.23(A), (B), or (G); 314.28(B); and 314.29Part III, 314.100(A) and (C); and 314.101 [314.70_(A)](https://2023.antflix.net#314.70_(A))", + "displayTitle": "(A) Pull and Junction Boxes", + "children": [], + "url": "https://2023.antflix.net#314.70_(A)" + }, + { + "body": "Where conduit bodies are used on systems over 1000 volts, the installation shall comply with Part III and with the following general provisions of this article: Part I, 314.4, and 314.5Part II, 314.15; 314.17; 314.23(A), (E), or (G); 314.28(A)(3); and 314.29Part III, 314.100(A) and 314.101 [314.70_(B)](https://2023.antflix.net#314.70_(B))", + "displayTitle": "(B) Conduit Bodies", + "children": [], + "url": "https://2023.antflix.net#314.70_(B)" + }, + { + "body": "Where handhole enclosures are used on systems over 1000 volts, the installation shall comply with Part III and with the following general provisions of this article: Part I, 314.3, 314.4, and 314.5Part II, 314.15, 314.17, 314.23(G), 314.28(B), 314.29, and 314.30 [314.70_(C)](https://2023.antflix.net#314.70_(C))", + "displayTitle": "(C) Handhole Enclosures", + "children": [], + "url": "https://2023.antflix.net#314.70_(C)" + } + ], + "url": "https://2023.antflix.net#314.70" + }, + { + "body": "Pull and junction boxes and handhole enclosures shall provide approved space and dimensions for the installation of conductors, and they shall comply with the specific requirements of this section. Conduit bodies shall be permitted if they meet the dimensional requirements for boxes. [314.71](https://2023.antflix.net#314.71)", + "displayTitle": "314.71 Size of Pull and Junction Boxes, Conduit Bodies, and Handhole Enclosures", + "children": [ + { + "body": "The length of the box shall not be less than 48 times the outside diameter, over sheath, of the largest shielded or lead-covered conductor or cable entering the box. The length shall not be less than 32 times the outside diameter of the largest nonshielded conductor or cable. [314.71_(A)](https://2023.antflix.net#314.71_(A))", + "displayTitle": "(A) For Straight Pulls", + "children": [], + "url": "https://2023.antflix.net#314.71_(A)" + }, + { + "displayTitle": "(B) For Angle or U Pulls", + "children": [ + { + "body": "The distance between each cable or conductor entry inside the box and the opposite wall of the box shall not be less than 36 times the outside diameter, over sheath, of the largest cable or conductor. This distance shall be increased for additional entries by the amount of the sum of the outside diameters, over sheath, of all other cables or conductor entries through the same wall of the box. Exception No. 1: Where a conductor or cable entry is in the wall of a box opposite a removable cover, the distance from that wall to the cover shall be permitted to be not less than the bending radius for the conductors as provided in 305.5. Exception No. 2: Where cables are nonshielded and not lead covered, the distance of 36 times the outside diameter shall be permitted to be reduced to 24 times the outside diameter. [314.71_(B)_(1)](https://2023.antflix.net#314.71_(B)_(1))", + "displayTitle": "(1) Distance to Opposite Wall", + "children": [], + "url": "https://2023.antflix.net#314.71_(B)_(1)" + }, + { + "body": "The distance between a cable or conductor entry and its exit from the box shall not be less than 36 times the outside diameter, over sheath, of that cable or conductor. Exception: Where cables are nonshielded and not lead covered, the distance of 36 times the outside diameter shall be permitted to be reduced to 24 times the outside diameter. [314.71_(B)_(2)](https://2023.antflix.net#314.71_(B)_(2))", + "displayTitle": "(2) Distance Between Entry and Exit", + "children": [], + "url": "https://2023.antflix.net#314.71_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#314.71_(B)" + }, + { + "body": "One or more sides of any pull box shall be removable. [314.71_(C)](https://2023.antflix.net#314.71_(C))", + "displayTitle": "(C) Removable Sides", + "children": [], + "url": "https://2023.antflix.net#314.71_(C)" + } + ], + "url": "https://2023.antflix.net#314.71" + }, + { + "displayTitle": "314.72 Construction and Installation Requirements", + "children": [ + { + "body": "Boxes shall be made of material inherently resistant to corrosion or shall be suitably protected, both internally and externally, by enameling, galvanizing, plating, or other means. [314.72_(A)](https://2023.antflix.net#314.72_(A))", + "displayTitle": "(A) Corrosion Protection", + "children": [], + "url": "https://2023.antflix.net#314.72_(A)" + }, + { + "body": "Suitable bushings, shields, or fittings having smooth, rounded edges shall be provided where conductors or cables pass through partitions and at other locations where necessary. [314.72_(B)](https://2023.antflix.net#314.72_(B))", + "displayTitle": "(B) Passing Through Partitions", + "children": [], + "url": "https://2023.antflix.net#314.72_(B)" + }, + { + "body": "Boxes shall provide a complete enclosure for the contained conductors or cables. [314.72_(C)](https://2023.antflix.net#314.72_(C))", + "displayTitle": "(C) Complete Enclosure", + "children": [], + "url": "https://2023.antflix.net#314.72_(C)" + }, + { + "body": "Boxes and conduit bodies shall be installed so that the conductors are accessible without removing any fixed part of the building or structure. Working space shall be provided in accordance with 110.34. [314.72_(D)](https://2023.antflix.net#314.72_(D))", + "displayTitle": "(D) Wiring Is Accessible", + "children": [], + "url": "https://2023.antflix.net#314.72_(D)" + }, + { + "body": "Boxes shall be closed by suitable covers securely fastened in place. Underground box covers that weigh over 45 kg (100 lb) shall be considered meeting this requirement. Covers for boxes shall be permanently marked \"DANGER - HIGH VOLTAGE - KEEP OUT.\" The marking shall be on the outside of the box cover and shall be readily visible. Letters shall be block type and at least 13 mm (1/2 in.) in height. [314.72_(E)](https://2023.antflix.net#314.72_(E))", + "displayTitle": "(E) Suitable Covers", + "children": [], + "url": "https://2023.antflix.net#314.72_(E)" + }, + { + "body": "Boxes and their covers shall be capable of withstanding the handling to which they are likely to be subjected. [314.72_(F)](https://2023.antflix.net#314.72_(F))", + "displayTitle": "(F) Suitable for Expected Handling", + "children": [], + "url": "https://2023.antflix.net#314.72_(F)" + } + ], + "url": "https://2023.antflix.net#314.72" + }, + { + "displayTitle": "Part IV Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_6_IV" + }, + { + "displayTitle": "314.100 Metal Boxes, Conduit Bodies, and Fittings", + "children": [ + { + "body": "Metal boxes, conduit bodies, and fittings shall be corrosion resistant or shall be well-galvanized, enameled, or otherwise properly coated inside and out to prevent corrosion. Informational Note: See 300.6 for limitation in the use of boxes and fittings protected from corrosion solely by enamel. [314.100_(A)](https://2023.antflix.net#314.100_(A))", + "displayTitle": "(A) Corrosion Resistant", + "children": [], + "url": "https://2023.antflix.net#314.100_(A)" + }, + { + "body": "Sheet steel boxes not over 1650 cm3 (100 in.3) in size shall be made from steel not less than 1.59 mm (0.0625 in.) thick. The wall of a malleable iron box or conduit body and a die-cast or permanent-mold cast aluminum, brass, bronze, or zinc box or conduit body shall not be less than 2.38 mm (3/32 in.) thick. Other cast metal boxes or conduit bodies shall have a wall thickness not less than 3.17 mm (1/8 in.). Exception No. 1: Listed boxes and conduit bodies shown to have equivalent strength and characteristics shall be permitted to be made of thinner or other metals. Exception No. 2: The walls of listed short radius conduit bodies, as covered in 314.16(C)(2), shall be permitted to be made of thinner metal. [314.100_(B)](https://2023.antflix.net#314.100_(B))", + "displayTitle": "(B) Thickness of Metal", + "children": [], + "url": "https://2023.antflix.net#314.100_(B)" + }, + { + "body": "Metal boxes over 1650 cm3 (100 in.3) in size shall be constructed so as to be of ample strength and rigidity. If of sheet steel, the metal thickness shall not be less than 1.35 mm (0.053 in.) uncoated. [314.100_(C)](https://2023.antflix.net#314.100_(C))", + "displayTitle": "(C) Metal Boxes Over 1650 cm3 (100 in.3)", + "children": [], + "url": "https://2023.antflix.net#314.100_(C)" + }, + { + "body": "A means shall be provided in each metal box for the connection of an equipment grounding conductor. The means shall be permitted to be a tapped hole or equivalent. [314.100_(D)](https://2023.antflix.net#314.100_(D))", + "displayTitle": "(D) Equipment Grounding Conductor Provisions", + "children": [], + "url": "https://2023.antflix.net#314.100_(D)" + } + ], + "url": "https://2023.antflix.net#314.100" + }, + { + "body": "Metal covers shall be of the same material as the box or conduit body with which they are used, or they shall be lined with firmly attached insulating material that is not less than 0.79 mm (1/32 in.) thick, or they shall be listed for the purpose. Metal covers shall be the same thickness as the boxes or conduit body for which they are used, or they shall be listed for the purpose. Covers of porcelain or other approved insulating materials shall be permitted if of such form and thickness as to afford the required protection and strength. [314.101](https://2023.antflix.net#314.101)", + "displayTitle": "314.101 Covers", + "children": [], + "url": "https://2023.antflix.net#314.101" + }, + { + "body": "Covers of outlet boxes and conduit bodies having holes through which flexible cord pendants pass shall be provided with approved bushings or shall have smooth, well-rounded surfaces on which the cord will bear. Where individual conductors pass through a metal cover, a separate hole equipped with a bushing of suitable insulating material shall be provided for each conductor. Such separate holes shall be connected by a slot as required by 300.20. [314.102](https://2023.antflix.net#314.102)", + "displayTitle": "314.102 Bushings", + "children": [], + "url": "https://2023.antflix.net#314.102" + }, + { + "body": "Provisions for supports or other mounting means for nonmetallic boxes shall be outside of the box, or the box shall be constructed so as to prevent contact between the conductors in the box and the supporting screws. [314.103](https://2023.antflix.net#314.103)", + "displayTitle": "314.103 Nonmetallic Boxes", + "children": [], + "url": "https://2023.antflix.net#314.103" + }, + { + "body": "All boxes and conduit bodies, covers, extension rings, plaster rings, and the like shall be durably and legibly marked with the manufacturer's name or trademark. [314.104](https://2023.antflix.net#314.104)", + "displayTitle": "314.104 Marking", + "children": [], + "url": "https://2023.antflix.net#314.104" + } + ], + "url": "https://2023.antflix.net#314" + }, + { + "displayTitle": "Article 315 Medium Voltage Conductors, Cable, Cable Joints, and Cable Terminations", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_12_I" + }, + { + "body": "This article covers the use, installation, construction specifications, and ampacities for Type MV medium voltage conductors, cable, cable joints, and cable terminations. This article includes voltages from 2001 volts to 35,000 volts ac, nominal and 2001 volts to 2500 volts dc, nominal. [315.1](https://2023.antflix.net#315.1)", + "displayTitle": "315.1 Scope", + "children": [], + "url": "https://2023.antflix.net#315.1" + }, + { + "body": "Type MV cables, type MV cable joints, type MV cable terminations, connectors, and associated fittings shall be listed. The listing requirement for Type MV cable joints, cable terminations, and connectors shall be effective January 1, 2026. [315.6](https://2023.antflix.net#315.6)", + "displayTitle": "315.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#315.6" + }, + { + "displayTitle": "Part II Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_12_II" + }, + { + "body": "Type MV cables shall comply with the applicable provisions in 315.10(A) through (C). [315.10](https://2023.antflix.net#315.10)", + "displayTitle": "315.10 Constructions and Applications", + "children": [ + { + "body": "Conductor application and insulation shall comply with Table 315.10(A).\nTable 315.10(A) Conductor Application and Insulation Rated 2001 Volts and Higher\n\n\n\nTrade Name\nType Letter\nMaximum Operating Temperature\nApplication Provision\nInsulation\nOuter Covering\n\n\n\n\nMedium voltage solid dielectric\nMV-90 MV-105*\n90\u00b0C 105\u00b0C\nDry or wet locations\nThermoplastic or thermosetting\nJacket, sheath, or armor\n\n\n\n*Where design conditions require maximum conductor temperatures above 90\u00b0C. [315.10_(A)](https://2023.antflix.net#315.10_(A))", + "displayTitle": "(A) Conductor Application and Insulation", + "children": [], + "url": "https://2023.antflix.net#315.10_(A)" + }, + { + "body": "Thickness of insulation and jacket for nonshielded solid dielectric insulated conductors rated 2001 volts to 5000 volts shall comply with Table 315.10(B).Table 315.10(B) Thickness of Insulation and Jacket for Nonshielded Solid Dielectric Insulated Conductors Rated 2001 Volts to 5000 Volts\n\n\n\nConductor Size (AWG or kcmil)\nDry Locations, Single Conductor\nWet or Dry Locations\n\n\nWithout Jacket Insulation\nWith Jacket\nSingle Conductor\nMulticonductor Insulation*\n\n\nInsulation\nJacket\nInsulation\nJacket\n\n\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\n\n\n\n\n8\n2.79\n110\n2.29\n90\n0.76\n30\n3.18\n125\n2.03\n80\n2.29\n90\n\n\n6\n2.79\n110\n2.29\n90\n0.76\n30\n3.18\n125\n2.03\n80\n2.29\n90\n\n\n4\u20142\n2.79\n110\n2.29\n90\n1.14\n45\n3.18\n125\n2.03\n80\n2.29\n90\n\n\n1\u20142/0\n2.79\n110\n2.29\n90\n1.14\n45\n3.18\n125\n2.03\n80\n2.29\n90\n\n\n3/0\u20144/0\n2.79\n110\n2.29\n90\n1.65\n65\n3.18\n125\n2.41\n95\n2.29\n90\n\n\n213\u2014500\n3.05\n120\n2.29\n90\n1.65\n65\n3.56\n140\n2.79\n110\n2.29\n90\n\n\n501\u2014750\n3.30\n130\n2.29\n90\n1.65\n65\n3.94\n155\n3.18\n125\n2.29\n90\n\n\n751\u20141000\n3.30\n130\n2.29\n90\n1.65\n65\n3.94\n155\n3.18\n125\n2.29\n90\n\n\n1001\u20141250\n3.56\n140\n2.92\n115\n1.65\n65\n4.32\n170\n3.56\n140\n2.92\n115\n\n\n1251\u20141500\n3.56\n140\n2.92\n115\n2.03\n80\n4.32\n170\n3.56\n140\n2.92\n115\n\n\n1501\u20142000\n3.56\n140\n2.92\n115\n2.03\n80\n4.32\n170\n3.94\n155\n3.56\n140\n\n\n\n*Under a common overall covering such as a jacket, sheath, or armor. [315.10_(B)](https://2023.antflix.net#315.10_(B))", + "displayTitle": "(B) Thickness of Insulation and Jacket for Nonshielded Insulated Conductors", + "children": [], + "url": "https://2023.antflix.net#315.10_(B)" + }, + { + "body": "Thickness of insulation for shielded solid dielectric insulated conductors rated 2001 volts to 35,000 volts shall comply with Table 315.10(C) and 315.10(C)(1) through (C)(3).Table 315.10(C) Thickness of Insulation for Shielded Solid Dielectric Insulated Conductors Rated 2001 Volts to 35,000 Volts\n\n\n\nConductor Size (AWG or kcmil)\n2001\u20145000 Volts\n5001\u20148000 Volts\n8001\u201415,000 Volts\n15,001\u201425,000 Volts\n\n\n100 Percent Insulation Level\n100 Percent Insulation Level\n133 Percent Insulation Level\n173 Percent Insulation Level\n100 Percent Insulation Level\n133 Percent Insulation Level\n173 Percent Insulation Level\n100 Percent Insulation Level\n133 Percent Insulation Level\n173 Percent Insulation Level\n\n\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\n\n\n\n\n8\n2.29\n90\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n\n\n6\u20144\n2.29\n90\n2.92\n115\n3.56\n140\n4.45\n175\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n-\n\n\n2\n2.29\n90\n2.92\n115\n3.56\n140\n4.45\n175\n445\n175\n5.59\n220\n6.60\n260\n-\n-\n-\n-\n-\n-\n\n\n1\n2.29\n90\n2.92\n115\n3.56\n140\n4.45\n175\n4.45\n175\n5.59\n220\n6.60\n260\n6.60\n260\n8.13\n320\n10.67\n420\n\n\n1/0\u20142000\n2.29\n90\n2.92\n115\n3.56\n140\n4.45\n175\n4.45\n175\n5.59\n220\n6.60\n260\n6.60\n260\n8.13\n320\n10.67\n420\n\n\n\n\n\n\nConductor Size (AWG or kcmil)\n25,001\u201428,000 Volts\n28,001\u201435,000 Volts\n\n\n100 Percent Insulation Level\n133 Percent Insulation Level\n173 Percent Insulation Level\n100 Percent Insulation Level\n133 Percent Insulation Level\n173 Percent Insulation Level\n\n\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\nmm\nmils\n\n\n\n\n1\n7.11\n280\n8.76\n345\n11.30\n445\n-\n-\n-\n-\n-\n-\n\n\n1/0\u20142000\n7.11\n280\n8.76\n345\n11.30\n445\n8.76\n345\n10.67\n420\n14.73\n580\n\n\n [315.10_(C)](https://2023.antflix.net#315.10_(C))", + "displayTitle": "(C) Thickness of Insulation for Shielded Insulated Conductors", + "children": [ + { + "body": "Cables shall be permitted to be applied where the system is provided with relay protection such that ground faults will be cleared as rapidly as possible but, in any case, within 1 minute. These cables are applicable to cable installations that are on grounded systems and shall be permitted to be used on other systems provided the above clearing requirements are met in completely de-energizing the faulted section. [315.10_(C)_(1)](https://2023.antflix.net#315.10_(C)_(1))", + "displayTitle": "(1) 100 Percent Insulation Level", + "children": [], + "url": "https://2023.antflix.net#315.10_(C)_(1)" + }, + { + "body": "Cables shall be permitted to be applied in situations where the clearing time requirements of the 100 percent level category cannot be met and the faulted section will be de-energized in a time not exceeding 1 hour. Cable shall be permitted to be used in 100 percent insulation level applications where the installation requires additional insulation. [315.10_(C)_(2)](https://2023.antflix.net#315.10_(C)_(2))", + "displayTitle": "(2) 133 Percent Insulation Level", + "children": [], + "url": "https://2023.antflix.net#315.10_(C)_(2)" + }, + { + "body": "Cables shall be permitted to be applied under all of the following conditions: In industrial establishments where the conditions of maintenance and supervision ensure only qualified persons service the installationWhere the fault clearing time requirements of the 133 percent level category cannot be metWhere an orderly shutdown is required to protect equipment and personnelWhere the faulted section will be de-energized in an orderly shutdownCables shall be permitted to be used in 100 percent or 133 percent insulation level applications where the installation requires additional insulation.Informational Note: See UL 1072, Medium-Voltage Power Cable, ANSI/ICEA S-93-639, American National Standard for 5-46kV Shielded Power Cable for Use in the Transmission and Distribution of Electric Energy, and ICEA S-94-649 2013, Standard for Concentric Neutral Cables Rated 5 through 46 kV for Medium Voltage Cables. [315.10_(C)_(3)](https://2023.antflix.net#315.10_(C)_(3))", + "displayTitle": "(3) 173 Percent Insulation Level", + "children": [], + "url": "https://2023.antflix.net#315.10_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#315.10_(C)" + } + ], + "url": "https://2023.antflix.net#315.10" + }, + { + "displayTitle": "315.12 Conductors", + "children": [ + { + "body": "The minimum size of conductors shall be as shown in Table 315.12(A), except as permitted elsewhere in this Code.\nTable 315.12(A) Minimum Size of Conductors\n\n\n\nConductor Voltage Rating (Volts)\nMinimum Conductor Size (AWG)\n\n\nCopper, Aluminum, or Copper-Clad Aluminum\n\n\n\n\n2001-5000\n8\n\n\n5001\u20148000\n6\n\n\n8001\u201415,000\n2\n\n\n15,001\u201428,000\n1\n\n\n28,001\u201435,000\n1/0\n\n\n [315.12_(A)](https://2023.antflix.net#315.12_(A))", + "displayTitle": "(A) Minimum Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#315.12_(A)" + }, + { + "body": "Conductors shall be of aluminum, copper-clad aluminum, or copper unless otherwise specified. [315.12_(B)](https://2023.antflix.net#315.12_(B))", + "displayTitle": "(B) Conductor Material", + "children": [], + "url": "https://2023.antflix.net#315.12_(B)" + }, + { + "body": "Where installed in raceways, conductors not specifically permitted or required elsewhere in this Code to be solid shall be stranded. [315.12_(C)](https://2023.antflix.net#315.12_(C))", + "displayTitle": "(C) Stranded Conductors", + "children": [], + "url": "https://2023.antflix.net#315.12_(C)" + } + ], + "url": "https://2023.antflix.net#315.12" + }, + { + "body": "Conductors that are intended for use as ungrounded conductors, whether used as a single conductor or in multiconductor cables, shall be finished to be clearly distinguishable from grounded and grounding conductors. Distinguishing markings shall not conflict in any manner with the surface markings required by 315.16(B)(1). Branch-circuit ungrounded conductors shall be identified in accordance with 210.5(C). Feeders shall be identified in accordance with 215.12. [315.14](https://2023.antflix.net#315.14)", + "displayTitle": "315.14 Conductor Identification", + "children": [], + "url": "https://2023.antflix.net#315.14" + }, + { + "displayTitle": "315.16 Marking for Type MV Cables and Conductors", + "children": [ + { + "body": "All conductors and cables shall be marked to indicate the following information, using the applicable method described in 315.16(B): The maximum rated voltageThe proper type letter or letters for the type of wire or cable as specified elsewhere in this CodeThe manufacturer's name, trademark, or other distinctive marking by which the organization responsible for the product can be readily identifiedThe AWG size or circular mil areaInformational Note: See Chapter 9, Table 8, Conductor Properties, for conductor area expressed in SI units for conductor sizes specified in AWG or circular mil area. [315.16_(A)](https://2023.antflix.net#315.16_(A))", + "displayTitle": "(A) Required Information for Type MV Cables and Conductors", + "children": [], + "url": "https://2023.antflix.net#315.16_(A)" + }, + { + "body": "One or more of the methods in 315.16(B)(1) through (B)(4) shall be used for marking of cable. [315.16_(B)](https://2023.antflix.net#315.16_(B))", + "displayTitle": "(B) Method of Marking for Type MV Cables and Conductors", + "children": [ + { + "body": "Cables shall be durably marked on the surface. The AWG size or circular mil area shall be repeated at intervals not exceeding 610 mm (24 in.). All other markings shall be repeated at intervals not exceeding 1.0 m (40 in.). [315.16_(B)_(1)](https://2023.antflix.net#315.16_(B)_(1))", + "displayTitle": "(1) Surface Marking", + "children": [], + "url": "https://2023.antflix.net#315.16_(B)_(1)" + }, + { + "body": "Metal-covered multiconductor cables shall employ a marker tape located within the cable and along its complete length. [315.16_(B)_(2)](https://2023.antflix.net#315.16_(B)_(2))", + "displayTitle": "(2) Marker Tape", + "children": [], + "url": "https://2023.antflix.net#315.16_(B)_(2)" + }, + { + "body": "Metal-covered, single-conductor cables shall be marked by means of a printed tag attached to the reel. [315.16_(B)_(3)](https://2023.antflix.net#315.16_(B)_(3))", + "displayTitle": "(3) Tag Marking", + "children": [], + "url": "https://2023.antflix.net#315.16_(B)_(3)" + }, + { + "body": "The information required in 315.16(A)(4) shall be permitted to be marked on the surface of the individual insulated conductors for multiconductor Type MC cable. [315.16_(B)_(4)](https://2023.antflix.net#315.16_(B)_(4))", + "displayTitle": "(4) Optional Marking of Wire Size", + "children": [], + "url": "https://2023.antflix.net#315.16_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#315.16_(B)" + }, + { + "body": "Cables shall be permitted to be marked to indicate special characteristics of the cable materials, such as limited smoke and sunlight resistance. [315.16_(C)](https://2023.antflix.net#315.16_(C))", + "displayTitle": "(C) Optional Markings", + "children": [], + "url": "https://2023.antflix.net#315.16_(C)" + } + ], + "url": "https://2023.antflix.net#315.16" + }, + { + "displayTitle": "315.17 Marking for Type MV Cable Joints and Terminations", + "children": [ + { + "body": "All Type MV cable joints, cable terminations, and connectors shall be marked to indicate the following information, using one or more of the methods described in 315.17(B)(l) or (B)(2), and shall be permitted to be optionally marked as described in 315.17(C): The maximum rated voltage.The proper type letter or letters for the type of wire or cable as specified elsewhere in this Code that the cable joint or cable terminations is listed for use with.The manufacturer's name, trademark, or other distinctive marking by which the organizations responsible for the product can be readily identified.The conductor AWG size or circular mil area size, or range of sizes, that the cable joint or cable terminations is listed for use with.The cable outer diameter size, or size range, that the cable joint or cable termination is listed for use with.Connectors shall be marked with the following information; the marking shall also be on the unit container (the smallest container in which the connector is packaged):The manufacturer's name, trademark, or other distinctive marking by which the organization responsible for the product can be readily identifiedThe manufacturer's catalog numberThe conductor AWG size or circular mil use range, and die number if applicableThe type of conductor material(s) the connector is for use with [315.17_(A)](https://2023.antflix.net#315.17_(A))", + "displayTitle": "(A) Required Information for Type MV Cable Joints, Terminations, and Connectors", + "children": [], + "url": "https://2023.antflix.net#315.17_(A)" + }, + { + "body": "One or both of the methods in 315.17(B)(1) or (B)(2) shall be used for the marking of cable joints, terminations, or connectors. [315.17_(B)](https://2023.antflix.net#315.17_(B))", + "displayTitle": "(B) Method of Marking for Type MV Cable Joints, Terminations, and Connectors", + "children": [ + { + "body": "Type MV cable joints, terminations, or connectors shall be durably marked on the surface. [315.17_(B)_(1)](https://2023.antflix.net#315.17_(B)_(1))", + "displayTitle": "(1) Surface Marking", + "children": [], + "url": "https://2023.antflix.net#315.17_(B)_(1)" + }, + { + "body": "Type MV cable joints, terminations, or connectors shall be marked by means of a durably printed tag or label attached to joint or termination. [315.17_(B)_(2)](https://2023.antflix.net#315.17_(B)_(2))", + "displayTitle": "(2) Tag Marking", + "children": [], + "url": "https://2023.antflix.net#315.17_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#315.17_(B)" + }, + { + "body": "Type MV cable joints and cable terminations shall be permitted to be marked to indicate special characteristics, such as limited smoke and sunlight resistance. [315.17_(C)](https://2023.antflix.net#315.17_(C))", + "displayTitle": "(C) Optional Markings", + "children": [], + "url": "https://2023.antflix.net#315.17_(C)" + } + ], + "url": "https://2023.antflix.net#315.17" + }, + { + "displayTitle": "Part III Installation", + "children": [], + "url": "https://2023.antflix.net#divider_10_III" + }, + { + "body": "A qualified person(s) with documented training and experience shall perform the installation and testing of Type MV cable. A qualified person(s) with documented training and experience in the installation of Type MV cable joints shall perform the installation of Type MV cable joints. A qualified person(s) with documented training and experience in the installation of Type MV cable terminations shall perform the installation of Type MV cable terminations. Informational Note No. 1: See ANSI/NECA/NCSCB 600-2020, Standard for Installing and Maintaining Medium-Voltage Cable, and IEEE 576, Recommended Practice for Installation, Termination, and Testing of Insulated Power Cables as Used in Industrial and Commercial Applications, for information about accepted industry practices and installation procedures for medium-voltage cable. Informational Note No. 2: Where medium-voltage cable is used for dc circuits, low frequency polarization can create hazardous voltages. When handling the cable these voltages could be present or could develop on dc stressed cable while the circuit is energized. Solidly grounding the cable prior to contacting, cutting or disconnecting cables in dc circuits is a method to discharge these voltages. [315.30](https://2023.antflix.net#315.30)", + "displayTitle": "315.30 Installation", + "children": [], + "url": "https://2023.antflix.net#315.30" + }, + { + "displayTitle": "315.32 Uses Permitted", + "children": [ + { + "body": "Type MV cable shall be permitted for use on power systems rated up to and including 35,000 volts, nominal, as follows: In wet or dry locations.In raceways.In cable trays, where identified for the use, in accordance with 392.10, 392.20(B), (C), and (D), 392.22(C), 392.30(B)(1), 392.46, 392.56, and 392.60. Type MV cable that has an overall metallic sheath or armor, complies with the requirements for Type MC cable, and is identified as \"MV or MC\" shall be permitted to be installed in cable trays in accordance with 392.10(B)(2).In messenger-supported wiring in accordance with Part II of Article 396.As exposed runs in accordance with 305.3. Type MV cable that has an overall metallic sheath or armor, complies with the requirements for Type MC cable, and is identified as \"MV or MC\" shall be permitted to be installed as exposed runs of metal-clad cable in accordance with 305.3.Corrosive conditions where exposed to oils, greases, vapors, gases, fumes, liquids, or other substances having a deleterious effect on the conductor or insulation shall be of a type suitable for the application.Conductors in parallel in accordance with 310.10(G).Type MV cable used where exposed to direct sunlight shall be identified for the use.Direct buried in accordance with 315.36. [315.32_(A)](https://2023.antflix.net#315.32_(A))", + "displayTitle": "(A) Type MV Cable", + "children": [], + "url": "https://2023.antflix.net#315.32_(A)" + }, + { + "body": "Type MV cable joints and terminations shall be permitted for use on power systems rated up to and including 35,000 volts, nominal, as follows:\n\nType MV cable joints and terminations, used where exposed to direct sunlight, shall be identified for the use.\nDirect buried.\nWhere used intermittently or continuously submerged in water at a depth not exceeding 7 m (23 ft) type MV cable joints and terminations shall be identified for the use.\nThe environmental operating temperature range shall be identified.\n\nWhere used in one or more of the following conditions Type MV cable joints and terminations shall be identified for the use:\n\nUnderground chambers\nTunnels\nConduits\nManholes\nVaults\n\n\nCorrosive conditions where exposed to oils, greases, vapors, gases, fumes, liquids, or other substances having a deleterious effect on the joint or termination shall be of a type suitable for the application.\nIn cable trays, where identified for use, in accordance with 392.10, 392.20(B), (C) and (D), 392.22(C), 392.30(B)(1), 392.46, 392.56, and 392.60.\n\nInformational Note No. 1: The \"uses permitted\" is not an all-inclusive list.\nInformational Note No. 2: See IEEE-404, IEEE Standard for Extruded and Laminated Dielectric Shielded Cable Joints Rated 2.5kV to 500kV, for more information on cable joints. Cable joints are often referred to as splices. However, the term splice includes many other applications not included in the definition of a cable joint.\nInformational Note No. 3: See IEEE-48, IEEE Standard for Test Procedures and Requirements for Alternating-Current Cable Terminations Used on Shielded Cables Having Laminated insulation Rated 2.5 kV through 765 kV or Extruded Insulation Rated 2.5 kV through 500 kV, for information on terminations. Type MV cable terminations include terminations used to connect directly to equipment or insulators.\nInformational Note No. 4: See IEEE-386, IEEE Standard for Separable Insulated Connector Systems for Power Distribution Systems Rated 2.5kV through 35 kV, and IEEE-1215, IEEE Guide for the Application of Separable Insulated Connectors, for more information on separable insulated connectors. Type MV cable terminations also include separable insulated connectors, which are a type of pluggable cable termination and can be used for connection to equipment, such as switchgear or transformers. A separable connector has a matching interface that the separable connector plugs into on the equipment, such as switchgear or transformers. Separable connectors can also be ganged together to form a distribution junction using specialized junction brackets. [315.32_(B)](https://2023.antflix.net#315.32_(B))", + "displayTitle": "(B) Type MV Cable Joints and Terminations", + "children": [], + "url": "https://2023.antflix.net#315.32_(B)" + } + ], + "url": "https://2023.antflix.net#315.32" + }, + { + "body": "Type MV conductors and cables used for direct burial applications shall be shielded, identified for such use, and installed in accordance with 305.15. Exception No. 1: Nonshielded multiconductor cables rated 2001 volts to 2400 volts shall be permitted if the cable has an overall metallic sheath or armor. The metallic shield, sheath, or armor shall be connected to a grounding electrode conductor, a grounding busbar, or a grounding electrode. Exception No. 2: Airfield lighting cable used in series circuits that are rated up to 5000 volts and are powered by regulators shall be permitted to be nonshielded. Informational Note to Exception No. 2: Federal Aviation Administration (FAA) Advisory Circulars (ACs) provide additional practices and methods for airport lighting. [315.36](https://2023.antflix.net#315.36)", + "displayTitle": "315.36 Direct-Burial Conductors", + "children": [], + "url": "https://2023.antflix.net#315.36" + }, + { + "body": "Type MV cable terminated in equipment or installed in pull boxes or vaults shall be secured and supported by metallic or nonmetallic supports suitable to withstand the weight by cable ties listed and identified for securement and support, or other approved means, at intervals not exceeding 1.5 m (5 ft) from terminations or a maximum of 1.8 m (6 ft) between supports. [315.40](https://2023.antflix.net#315.40)", + "displayTitle": "315.40 Support", + "children": [], + "url": "https://2023.antflix.net#315.40" + }, + { + "body": "Nonshielded, ozone-resistant insulated conductors with a maximum phase-to-phase voltage of 5000 volts shall be permitted in Type MC cables in industrial establishments where the conditions of maintenance and supervision ensure that only qualified persons service the installation. For other establishments, solid dielectric insulated conductors operated above 2000 volts in permanent installations shall have ozone-resistant insulation and shall be shielded. All metallic insulation shields shall be connected to a grounding electrode conductor, a grounding busbar, an equipment grounding conductor, or a grounding electrode. Equipment grounding conductors installed with circuits using medium voltage cables shall be sized according to 250.190(C). Informational Note: The primary purposes of shielding are to confine the voltage stresses to the insulation, dissipate insulation leakage current, and drain off the capacitive charging current. Exception No. 1: Nonshielded insulated conductors listed by a qualified testing laboratory shall be permitted for use up to 2400 volts under the following conditions: (1) Conductors shall have insulation resistant to electric discharge and surface tracking, or the insulated conductor(s) shall be covered with a material resistant to ozone, electric discharge, and surface tracking. (2) Where used in wet locations, the insulated conductor(s) shall have an overall nonmetallic jacket or a continuous metallic sheath. (3) Insulation and jacket thicknesses shall be in accordance with Table 315.10(B). Exception No. 2: Nonshielded insulated conductors listed by a qualified testing laboratory shall be permitted for use up to 5000 volts to replace existing nonshielded conductors, on existing equipment in industrial establishments only, under the following conditions: (1) Where the condition of maintenance and supervision ensures that only qualified personnel install and service the installation. (2) Conductors shall have insulation resistant to electric discharge and surface tracking, or the insulated conductor(s) shall be covered with a material resistant to ozone, electric discharge, and surface tracking. (3) Where used in wet locations, the insulated conductor(s) shall have an overall nonmetallic jacket or a continuous metallic sheath, (4) Insulation and jacket thicknesses shall be in accordance with Table 315.10(B). Informational Note: Relocation or replacement of equipment may not comply with the term existing as related to this exception. Exception No. 3: Where permitted in 315.36, Exception No. 2. [315.44](https://2023.antflix.net#315.44)", + "displayTitle": "315.44 Shielding", + "children": [], + "url": "https://2023.antflix.net#315.44" + }, + { + "body": "Type MV cable joints and terminations shall be provided with means to connect the metallic insulation shield to ground if required. [315.45](https://2023.antflix.net#315.45)", + "displayTitle": "315.45 Shielding at Type MV Cable Joints and Terminations", + "children": [], + "url": "https://2023.antflix.net#315.45" + }, + { + "displayTitle": "Part IV Ampacities", + "children": [], + "url": "https://2023.antflix.net#divider_7_IV" + }, + { + "displayTitle": "315.60 Ampacities of Conductors", + "children": [ + { + "displayTitle": "(A) General", + "children": [ + { + "body": "Ampacities for solid dielectric-insulated conductors shall be permitted to be determined by tables or under engineering supervision, as provided in 315.60(B) and (C). The ampacity of Type MV cable installed in cable tray shall be determined in accordance with 392.80(B). [315.60_(A)_(1)](https://2023.antflix.net#315.60_(A)_(1))", + "displayTitle": "(1) Tables or Engineering Supervision", + "children": [], + "url": "https://2023.antflix.net#315.60_(A)_(1)" + }, + { + "body": "Where more than one calculated or tabulated ampacity could apply for a given circuit length, the lowest value shall be used. Exception: Where different ampacities apply to portions of a circuit, the higher ampacity shall be permitted to be used if the total portion(s) of the circuit with the lower ampacity does not exceed the lesser of 3.0 m (10 ft) or 10 percent of the total circuit. Informational Note: See 110.40 for conductor temperature limitations due to termination provisions. [315.60_(A)_(2)](https://2023.antflix.net#315.60_(A)_(2))", + "displayTitle": "(2) Selection of Ampacity", + "children": [], + "url": "https://2023.antflix.net#315.60_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#315.60_(A)" + }, + { + "body": "Under engineering supervision, conductor ampacities shall be permitted to be calculated by using the following general equation: [315.60(B)] where: Tc = conductor temperature (\u00b0C) Ta = ambient temperature (\u00b0C) \u0394Td = dielectric loss temperature rise Rdc = dc resistance of conductor at temperature, Tc Yc = component ac resistance resulting from skin effect and proximity effect Rca = effective thermal resistance between conductor and surrounding ambient Informational Note: The dielectric loss temperature rise (\u0394Td) is negligible for single circuit extruded dielectric cables rated below 46 kV. [315.60_(B)](https://2023.antflix.net#315.60_(B))", + "displayTitle": "(B) Engineering Supervision", + "children": [], + "url": "https://2023.antflix.net#315.60_(B)" + }, + { + "body": "Ampacities for conductors rated 2001 volts to 35,000 volts shall be as specified in Table 315.60(C)(1) through Table 315.60(C)(20). Ampacities for ambient temperatures other than those specified in the ampacity tables shall be corrected in accordance with 315.60(D)(4).\nInformational Note No. 1: See IEEE 835, Standard Power Cable Ampacity Tables, and the references therein for availability of all factors and constants for ampacities calculated in accordance with 315.60(A).\nInformational Note No. 2: See 210.19, Informational Note, for voltage drop on branch circuits that this section does not take into consideration. See 215.2(A)(2), Informational Note No. 2, for voltage drop on feeders that this section does not take into consideration.\nTable 315.60(C)(1) Ampacities of Insulated Single Copper Conductor Cables Triplexed in Air\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\n8\n65\n74\n-\n-\n\n\n6\n90\n99\n100\n110\n\n\n4\n120\n130\n130\n140\n\n\n2\n160\n175\n170\n195\n\n\n1\n185\n205\n195\n225\n\n\n1/0\n215\n240\n225\n255\n\n\n2/0\n250\n275\n260\n295\n\n\n3/0\n290\n320\n300\n340\n\n\n4/0\n335\n375\n345\n390\n\n\n250\n375\n415\n380\n430\n\n\n350\n465\n515\n470\n525\n\n\n500\n580\n645\n580\n650\n\n\n750\n750\n835\n730\n820\n\n\n1000\n880\n980\n850\n950\n\n\n\nNote: Refer to 315.60(E) for the basis of ampacities, 315.10(A) for conductor maximum operating temperature and application, and 315.60(D)(4) for the ampacity correction factors where the ambient air temperature is other than 40\u00b0C (104\u00b0F).\nTable 315.60(C)(2) Ampacities of Insulated Single Aluminum Conductor Cables Triplexed in Air\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\n8\n50\n57\n-\n-\n\n\n6\n70\n77\n75\n84\n\n\n4\n90\n100\n100\n110\n\n\n2\n125\n135\n130\n150\n\n\n1\n145\n160\n150\n175\n\n\n1/0\n170\n185\n175\n200\n\n\n2/0\n195\n215\n200\n230\n\n\n3/0\n225\n250\n230\n265\n\n\n4/0\n265\n290\n270\n305\n\n\n250\n295\n325\n300\n335\n\n\n350\n365\n405\n370\n415\n\n\n500\n460\n510\n460\n515\n\n\n750\n600\n665\n590\n660\n\n\n1000\n715\n800\n700\n780\n\n\n\nNote: Refer to 315.60(E) for basis of ampacities, 315.10(A) for conductor maximum operating temperature and application, and 315.60(D)(4) for the ampacity correction factors where the ambient air temperature is other than 40\u00b0C (104\u00b0F).\nTable 315.60(C)(3) Ampacities of Insulated Single Copper Conductor Isolated in Air\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201415,000 Volts Ampacity\n15,001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\n8\n83\n93\n-\n-\n-\n-\n\n\n6\n110\n120\n110\n125\n-\n-\n\n\n4\n145\n160\n150\n165\n-\n-\n\n\n2\n190\n215\n195\n215\n-\n-\n\n\n1\n225\n250\n225\n250\n225\n250\n\n\n1/0\n260\n290\n260\n290\n260\n290\n\n\n2/0\n300\n330\n300\n335\n300\n330\n\n\n3/0\n345\n385\n345\n385\n345\n380\n\n\n4/0\n400\n445\n400\n445\n395\n445\n\n\n250\n445\n495\n445\n495\n440\n490\n\n\n350\n550\n615\n550\n610\n545\n605\n\n\n500\n695\n775\n685\n765\n680\n755\n\n\n750\n900\n1000\n885\n990\n870\n970\n\n\n1000\n1075\n1200\n1060\n1185\n1040\n1160\n\n\n1250\n1230\n1370\n1210\n1350\n1185\n1320\n\n\n1500\n1365\n1525\n1345\n1500\n1315\n1465\n\n\n1750\n1495\n1665\n1470\n1640\n1430\n1595\n\n\n2000\n1605\n1790\n1575\n1755\n1535\n1710\n\n\n\nNote: Refer to 315.60(E) for the basis of ampacities, 315.10(A) for conductor maximum operating temperature and application, and 315.60(D)(4) for the ampacity correction factors where the ambient air temperature is other than 40\u00b0C (104\u00b0F).\nTable 315.60(C)(4) Ampacities of Insulated Single Aluminum Conductor Isolated in Air\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201415,000 Volts Ampacity\n15,001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\n8\n64\n71\n-\n-\n-\n-\n\n\n6\n85\n95\n87\n97\n-\n-\n\n\n4\n115\n125\n115\n130\n-\n-\n\n\n2\n150\n165\n150\n170\n-\n-\n\n\n1\n175\n195\n175\n195\n175\n195\n\n\n1/0\n200\n225\n200\n225\n200\n225\n\n\n2/0\n230\n260\n235\n260\n230\n260\n\n\n3/0\n270\n300\n270\n300\n270\n300\n\n\n4/0\n310\n350\n310\n350\n310\n345\n\n\n250\n345\n385\n345\n385\n345\n380\n\n\n350\n430\n480\n430\n480\n430\n475\n\n\n500\n545\n605\n535\n600\n530\n590\n\n\n750\n710\n790\n700\n780\n685\n765\n\n\n1000\n855\n950\n840\n940\n825\n920\n\n\n1250\n980\n1095\n970\n1080\n950\n1055\n\n\n1500\n1105\n1230\n1085\n1215\n1060\n1180\n\n\n1750\n1215\n1355\n1195\n1335\n1165\n1300\n\n\n2000\n1320\n1475\n1295\n1445\n1265\n1410\n\n\n\nNote: Refer to 315.60(E) for the basis of ampacities, 315.10(A) for conductor maximum operating temperature and application, and 315.60(D)(4) for the ampacity correction factors where the ambient air temperature is other than 40\u00b0C (104\u00b0F).\nTable 315.60(C)(5) Ampacities of an Insulated Three-Conductor Copper Cable Isolated in Air\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\n8\n59\n66\n-\n-\n\n\n6\n79\n88\n93\n105\n\n\n4\n105\n115\n120\n135\n\n\n2\n140\n154\n165\n185\n\n\n1\n160\n180\n185\n210\n\n\n1/0\n185\n205\n215\n240\n\n\n2/0\n215\n240\n245\n275\n\n\n3/0\n250\n280\n285\n315\n\n\n4/0\n285\n320\n325\n360\n\n\n250\n320\n355\n360\n400\n\n\n350\n395\n440\n435\n490\n\n\n500\n485\n545\n535\n600\n\n\n750\n615\n685\n670\n745\n\n\n1000\n705\n790\n770\n860\n\n\n\nNote: Refer to 315.60(E) for the basis of ampacities, 315.10(A) for conductor maximum operating temperature and application, and 315.60(D)(4) for the ampacity correction factors where the ambient air temperature is other than 40\u00b0C (104\u00b0F).\nTable 315.60(C)(6) Ampacities of an Insulated Three-Conductor Aluminum Cable Isolated in Air\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\n8\n46\n51\n-\n-\n\n\n6\n61\n68\n72\n80\n\n\n4\n81\n90\n95\n105\n\n\n2\n110\n120\n125\n145\n\n\n1\n125\n140\n145\n165\n\n\n1/0\n145\n160\n170\n185\n\n\n2/0\n170\n185\n190\n215\n\n\n3/0\n195\n215\n220\n245\n\n\n4/0\n225\n250\n255\n285\n\n\n250\n250\n280\n280\n315\n\n\n350\n310\n345\n345\n385\n\n\n500\n385\n430\n425\n475\n\n\n750\n495\n550\n540\n600\n\n\n1000\n585\n650\n635\n705\n\n\n\nNote: Refer to 315.60(E) for the basis of ampacities, 315.10(A) for conductor maximum operating temperature and application, and 315.60(D)(4) for the ampacity correction factors where the ambient air temperature is other than 40\u00b0C (104\u00b0F).\nTable 315.60(C)(7) Ampacities of an Insulated Triplexed or Three Single-Conductor Copper Cables in Isolated Conduit in Air\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\n8\n55\n61\n-\n-\n\n\n6\n75\n84\n83\n93\n\n\n4\n97\n110\n110\n120\n\n\n2\n130\n145\n150\n165\n\n\n1\n155\n175\n170\n190\n\n\n1/0\n180\n200\n195\n215\n\n\n2/0\n205\n225\n225\n255\n\n\n3/0\n240\n270\n260\n290\n\n\n4/0\n280\n305\n295\n330\n\n\n250\n315\n355\n330\n365\n\n\n350\n385\n430\n395\n440\n\n\n500\n475\n530\n480\n535\n\n\n750\n600\n665\n585\n655\n\n\n1000\n690\n770\n675\n755\n\n\n\nNote: Refer to 315.60(E) for the basis of ampacities, 315.10(A) for conductor maximum operating temperature and application, and 315.60(D)(4) for the ampacity correction factors where the ambient air temperature is other than 40\u00b0C (104\u00b0F).\nTable 315.60(C)(8) Ampacities of an Insulated Triplexed or Three Single-Conductor Aluminum Cables in Isolated Conduit in Air\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\n8\n43\n48\n-\n-\n\n\n6\n58\n65\n65\n72\n\n\n4\n76\n85\n84\n94\n\n\n2\n100\n115\n115\n130\n\n\n1\n120\n135\n130\n150\n\n\n1/0\n140\n155\n150\n170\n\n\n2/0\n160\n175\n175\n200\n\n\n3/0\n190\n210\n200\n225\n\n\n4/0\n215\n240\n230\n260\n\n\n250\n250\n280\n255\n290\n\n\n350\n305\n340\n310\n350\n\n\n500\n380\n425\n385\n430\n\n\n750\n490\n545\n485\n540\n\n\n1000\n580\n645\n565\n640\n\n\n\nNote: Refer to 315.60(E) for the basis of ampacities, 315.10(A) for conductor maximum operating temperature and application, and 315.60(D)(4) for the ampacity correction factors where the ambient air temperature is other than 40\u00b0C (104\u00b0F).\nTable 315.60(C)(9) Ampacities of an Insulated Three-Conductor Copper Cable in Isolated Conduit in Air\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\n8\n52\n58\n-\n-\n\n\n6\n69\n77\n83\n92\n\n\n4\n91\n100\n105\n120\n\n\n2\n125\n135\n145\n165\n\n\n1\n140\n155\n165\n185\n\n\n1/0\n165\n185\n195\n215\n\n\n2/0\n190\n210\n220\n245\n\n\n3/0\n220\n245\n250\n280\n\n\n4/0\n255\n285\n290\n320\n\n\n250\n280\n315\n315\n350\n\n\n350\n350\n390\n385\n430\n\n\n500\n425\n475\n470\n525\n\n\n750\n525\n585\n570\n635\n\n\n1000\n590\n660\n650\n725\n\n\n\nNote: Refer to 315.60(E) for the basis of ampacities, 315.10(A) for conductor maximum operating temperature and application, and 315.60(D)(4) for the ampacity correction factors where the ambient air temperature is other than 40\u00b0C (104\u00b0F).\nTable 315.60(C)(10) Ampacities of an Insulated Three-Conductor Aluminum Cable in Isolated Conduit in Air\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\n8\n41\n46\n-\n-\n\n\n6\n53\n59\n64\n71\n\n\n4\n71\n79\n84\n94\n\n\n2\n96\n105\n115\n125\n\n\n1\n110\n125\n130\n145\n\n\n1/0\n130\n145\n150\n170\n\n\n2/0\n150\n165\n170\n190\n\n\n3/0\n170\n190\n195\n220\n\n\n4/0\n200\n225\n225\n255\n\n\n250\n220\n245\n250\n280\n\n\n350\n275\n305\n305\n340\n\n\n500\n340\n380\n380\n425\n\n\n750\n430\n480\n470\n520\n\n\n1000\n505\n560\n550\n615\n\n\n\nNote: Refer to 315.60(E) for the basis of ampacities, 315.10(A) for conductor maximum operating temperature and application, and 315.60(D)(4) for the ampacity correction factors where the ambient air temperature is other than 40\u00b0C (104\u00b0F).\nTable 315.60(C)(11) Ampacities of Three Single-Insulated Copper Conductors in Underground Electrical Ducts (Three Conductors per Electrical Duct)\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\nOne Circuit [See Figure 315.60(D)(3), Detail 1.]\n\n\n8\n64\n69\n-\n-\n\n\n6\n85\n92\n90\n97\n\n\n4\n110\n120\n115\n125\n\n\n2\n145\n155\n155\n165\n\n\n1\n170\n180\n175\n185\n\n\n1/0\n195\n210\n200\n215\n\n\n2/0\n220\n235\n230\n245\n\n\n3/0\n250\n270\n260\n275\n\n\n4/0\n290\n310\n295\n315\n\n\n250\n320\n345\n325\n345\n\n\n350\n385\n415\n390\n415\n\n\n500\n470\n505\n465\n500\n\n\n750\n585\n630\n565\n610\n\n\n1000\n670\n720\n640\n690\n\n\nThree Circuits [See Figure 315.60(D)(3), Detail 2.]\n\n\n8\n56\n60\n-\n-\n\n\n6\n73\n79\n77\n83\n\n\n4\n95\n100\n99\n105\n\n\n2\n125\n130\n130\n135\n\n\n1\n140\n150\n145\n155\n\n\n1/0\n160\n175\n165\n175\n\n\n2/0\n185\n195\n185\n200\n\n\n3/0\n210\n225\n210\n225\n\n\n4/0\n235\n255\n240\n255\n\n\n250\n260\n280\n260\n280\n\n\n350\n315\n335\n310\n330\n\n\n500\n375\n405\n370\n395\n\n\n750\n460\n495\n440\n475\n\n\n1000\n525\n565\n495\n535\n\n\nSix Circuits [See Figure 315.60(D)(3), Detail 3.]\n\n\n8\n48\n52\n-\n-\n\n\n6\n62\n67\n64\n68\n\n\n4\n80\n86\n82\n88\n\n\n2\n105\n110\n105\n115\n\n\n1\n115\n125\n120\n125\n\n\n1/0\n135\n145\n135\n145\n\n\n2/0\n150\n160\n150\n165\n\n\n3/0\n170\n185\n170\n185\n\n\n4/0\n195\n210\n190\n205\n\n\n250\n210\n225\n210\n225\n\n\n350\n250\n270\n245\n265\n\n\n500\n300\n325\n290\n310\n\n\n750\n365\n395\n350\n375\n\n\n1000\n410\n445\n390\n415\n\n\n\nNote: Refer to 315.60(F) for basis of ampacities and Table 315.10(A) for the temperature rating of the conductor.\nTable 315.60(C)(12) Ampacities of Three Single-Insulated Aluminum Conductors in Underground Electrical Ducts (Three Conductors per Electrical Duct)\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\nOne Circuit [See Figure 315.60(D)(3), Detail 1.]\n\n\n8\n50\n54\n-\n-\n\n\n6\n66\n71\n70\n75\n\n\n4\n86\n93\n91\n98\n\n\n2\n115\n125\n120\n130\n\n\n1\n130\n140\n135\n145\n\n\n1/0\n150\n160\n155\n165\n\n\n2/0\n170\n185\n175\n190\n\n\n3/0\n195\n210\n200\n215\n\n\n4/0\n225\n245\n230\n245\n\n\n250\n250\n270\n250\n270\n\n\n350\n305\n325\n305\n330\n\n\n500\n370\n400\n370\n400\n\n\n750\n470\n505\n455\n490\n\n\n1000\n545\n590\n525\n565\n\n\nThree Circuits [See Figure 315.60(D)(3), Detail 2.]\n\n\n8\n44\n47\n-\n-\n\n\n6\n57\n61\n60\n65\n\n\n4\n74\n80\n77\n83\n\n\n2\n96\n105\n100\n105\n\n\n1\n110\n120\n110\n120\n\n\n1/0\n125\n135\n125\n140\n\n\n2/0\n145\n155\n145\n155\n\n\n3/0\n160\n175\n165\n175\n\n\n4/0\n185\n200\n185\n200\n\n\n250\n205\n220\n200\n220\n\n\n350\n245\n265\n245\n260\n\n\n500\n295\n320\n290\n315\n\n\n750\n370\n395\n355\n385\n\n\n1000\n425\n460\n405\n440\n\n\nSix Circuits [See Figure 315.60(D)(3), Detail 3.]\n\n\n8\n38\n41\n-\n-\n\n\n6\n48\n52\n50\n54\n\n\n4\n62\n67\n64\n69\n\n\n2\n80\n86\n80\n88\n\n\n1\n91\n98\n90\n99\n\n\n1/0\n105\n110\n105\n110\n\n\n2/0\n115\n125\n115\n125\n\n\n3/0\n135\n145\n130\n145\n\n\n4/0\n150\n165\n150\n160\n\n\n250\n165\n180\n165\n175\n\n\n350\n195\n210\n195\n210\n\n\n500\n240\n255\n230\n250\n\n\n750\n290\n315\n280\n305\n\n\n1000\n335\n360\n320\n345\n\n\n\nNote: Refer to 315.60(F) for basis of ampacities and Table 315.10(A) for the temperature rating of the conductor.\nTable 315.60(C)(13) Ampacities of Three Insulated Copper Conductors Cabled Within an Overall Covering (Three-Conductor Cable) in Underground Electrical Ducts (One Cable per Electrical Duct)\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\nOne Circuit [See Figure 315.60(D)(3), Detail 1.]\n\n\n8\n59\n64\n-\n-\n\n\n6\n78\n84\n88\n95\n\n\n4\n100\n110\n115\n125\n\n\n2\n135\n145\n150\n160\n\n\n1\n155\n165\n170\n185\n\n\n1/0\n175\n190\n195\n210\n\n\n2/0\n200\n220\n220\n235\n\n\n3/0\n230\n250\n250\n270\n\n\n4/0\n265\n285\n285\n305\n\n\n250\n290\n315\n310\n335\n\n\n350\n355\n380\n375\n400\n\n\n500\n430\n460\n450\n485\n\n\n750\n530\n570\n545\n585\n\n\n1000\n600\n645\n615\n660\n\n\nThree Circuits [See Figure 315.60(D)(3), Detail 2.]\n\n\n8\n53\n57\n-\n-\n\n\n6\n69\n74\n75\n81\n\n\n4\n89\n96\n97\n105\n\n\n2\n115\n125\n125\n135\n\n\n1\n135\n145\n140\n155\n\n\n1/0\n150\n165\n160\n175\n\n\n2/0\n170\n185\n185\n195\n\n\n3/0\n195\n210\n205\n220\n\n\n4/0\n225\n240\n230\n250\n\n\n250\n245\n265\n255\n270\n\n\n350\n295\n315\n305\n325\n\n\n500\n355\n380\n360\n385\n\n\n750\n430\n465\n430\n465\n\n\n1000\n485\n520\n485\n515\n\n\nSix Circuits [See Figure 315.60(D)(3), Detail 3.]\n\n\n8\n46\n50\n-\n-\n\n\n6\n60\n65\n63\n68\n\n\n4\n77\n83\n81\n87\n\n\n2\n98\n105\n105\n110\n\n\n1\n110\n120\n115\n125\n\n\n1/0\n125\n135\n130\n145\n\n\n2/0\n145\n155\n150\n160\n\n\n3/0\n165\n175\n170\n180\n\n\n4/0\n185\n200\n190\n200\n\n\n250\n200\n220\n205\n220\n\n\n350\n240\n270\n245\n275\n\n\n500\n290\n310\n290\n305\n\n\n750\n350\n375\n340\n365\n\n\n1000\n390\n420\n380\n405\n\n\n\nNote: Refer to 315.60(F) for basis of ampacities and Table 315.10(A) for the temperature rating of the conductor.\nTable 315.60(C)(14) Ampacities of Three Insulated Aluminum Conductors Cabled Within an Overall Covering (Three-Conductor Cable) in Underground Electrical Ducts (One Cable per Electrical Duct)\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\nOne Circuit [See Figure 315.60(D)(3), Detail 1.]\n\n\n8\n46\n50\n-\n-\n\n\n6\n61\n66\n69\n74\n\n\n4\n80\n86\n89\n96\n\n\n2\n105\n110\n115\n125\n\n\n1\n120\n130\n135\n145\n\n\n1/0\n140\n150\n150\n165\n\n\n2/0\n160\n170\n170\n185\n\n\n3/0\n180\n195\n195\n210\n\n\n4/0\n205\n220\n220\n240\n\n\n250\n230\n245\n245\n265\n\n\n350\n280\n310\n295\n315\n\n\n500\n340\n365\n355\n385\n\n\n750\n425\n460\n440\n475\n\n\n1000\n495\n535\n510\n545\n\n\nThree Circuits [See Figure 315.60(D)(3), Detail 2.]\n\n\n8\n41\n44\n-\n-\n\n\n6\n54\n58\n59\n64\n\n\n4\n70\n75\n75\n81\n\n\n2\n90\n97\n100\n105\n\n\n1\n105\n110\n110\n120\n\n\n1/0\n120\n125\n125\n135\n\n\n2/0\n135\n145\n140\n155\n\n\n3/0\n155\n165\n160\n175\n\n\n4/0\n175\n185\n180\n195\n\n\n250\n190\n205\n200\n215\n\n\n350\n230\n250\n240\n255\n\n\n500\n280\n300\n285\n305\n\n\n750\n345\n375\n350\n375\n\n\n1000\n400\n430\n400\n430\n\n\nSix Circuits [See Figure 315.60(D)(3), Detail 3.]\n\n\n8\n36\n39\n-\n-\n\n\n6\n46\n50\n49\n53\n\n\n4\n60\n65\n63\n68\n\n\n2\n77\n83\n80\n86\n\n\n1\n87\n94\n90\n98\n\n\n1/0\n99\n105\n105\n110\n\n\n2/0\n110\n120\n115\n125\n\n\n3/0\n130\n140\n130\n140\n\n\n4/0\n145\n155\n150\n160\n\n\n250\n160\n170\n160\n170\n\n\n350\n190\n205\n190\n205\n\n\n500\n230\n245\n230\n245\n\n\n750\n280\n305\n275\n295\n\n\n1000\n320\n345\n315\n335\n\n\n\nNote: Refer to 315.60(F) for basis of ampacities and Table 315.10(A) for the temperature rating of the conductor.\nTable 315.60(C)(15) Ampacities of Single Insulated Copper Conductors Directly Buried in Earth\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\nOne Circuit, Three Conductors [See Figure 315.60(D)(3), Detail 9.]\n\n\n8\n110\n115\n-\n-\n\n\n6\n140\n150\n130\n140\n\n\n4\n180\n195\n170\n180\n\n\n2\n230\n250\n210\n225\n\n\n1\n260\n280\n240\n260\n\n\n1/0\n295\n320\n275\n295\n\n\n2/0\n335\n365\n310\n335\n\n\n3/0\n385\n415\n355\n380\n\n\n4/0\n435\n465\n405\n435\n\n\n250\n470\n510\n440\n475\n\n\n350\n570\n615\n535\n575\n\n\n500\n690\n745\n650\n700\n\n\n750\n845\n910\n805\n865\n\n\n1000\n980\n1055\n930\n1005\n\n\nTwo Circuits, Six Conductors [See Figure 315.60(D)(3), Detail 10.]\n\n\n8\n100\n110\n-\n-\n\n\n6\n130\n140\n120\n130\n\n\n4\n165\n180\n160\n170\n\n\n2\n215\n230\n195\n210\n\n\n1\n240\n260\n225\n240\n\n\n1/0\n275\n295\n255\n275\n\n\n2/0\n310\n335\n290\n315\n\n\n3/0\n355\n380\n330\n355\n\n\n4/0\n400\n430\n375\n405\n\n\n250\n435\n470\n410\n440\n\n\n350\n520\n560\n495\n530\n\n\n500\n630\n680\n600\n645\n\n\n750\n775\n835\n740\n795\n\n\n1000\n890\n960\n855\n920\n\n\n\nNote: Refer to 315.60(F) for basis of ampacities and Table 315.10(A) for the temperature rating of the conductor.\nTable 315.60(C)(16) Ampacities of Single Insulated Aluminum Conductors Directly Buried in Earth\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\nOne Circuit, Three Conductors [See Figure 315.60(D)(3), Detail 9.]\n\n\n8\n85\n90\n-\n-\n\n\n6\n110\n115\n100\n110\n\n\n4\n140\n150\n130\n140\n\n\n2\n180\n195\n165\n175\n\n\n1\n205\n220\n185\n200\n\n\n1/0\n230\n250\n215\n230\n\n\n2/0\n265\n285\n245\n260\n\n\n3/0\n300\n320\n275\n295\n\n\n4/0\n340\n365\n315\n340\n\n\n250\n370\n395\n345\n370\n\n\n350\n445\n480\n415\n450\n\n\n500\n540\n580\n510\n545\n\n\n750\n665\n720\n635\n680\n\n\n1000\n780\n840\n740\n795\n\n\nTwo Circuits, Six Conductors [See Figure 315.60(D)(3), Detail 10.]\n\n\n8\n80\n85\n-\n-\n\n\n6\n100\n110\n95\n100\n\n\n4\n130\n140\n125\n130\n\n\n2\n165\n180\n155\n165\n\n\n1\n190\n200\n175\n190\n\n\n1/0\n215\n230\n200\n215\n\n\n2/0\n245\n260\n225\n245\n\n\n3/0\n275\n295\n255\n275\n\n\n4/0\n310\n335\n290\n315\n\n\n250\n340\n365\n320\n345\n\n\n350\n410\n440\n385\n415\n\n\n500\n495\n530\n470\n505\n\n\n750\n610\n655\n580\n625\n\n\n1000\n710\n765\n680\n730\n\n\n\nNote: Refer to 315.60(F) for basis of ampacities and Table 315.10(A) for the temperature rating of the conductor.\nTable 315.60(C)(17) Ampacities of Three Insulated Copper Conductors Cabled Within an Overall Covering (Three-Conductor Cable), Directly Buried in Earth\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\nOne Circuit [See Figure 315.60(D)(3), Detail 5.]\n\n\n8\n85\n89\n-\n-\n\n\n6\n105\n115\n115\n120\n\n\n4\n135\n150\n145\n155\n\n\n2\n180\n190\n185\n200\n\n\n1\n200\n215\n210\n225\n\n\n1/0\n230\n245\n240\n255\n\n\n2/0\n260\n280\n270\n290\n\n\n3/0\n295\n320\n305\n330\n\n\n4/0\n335\n360\n350\n375\n\n\n250\n365\n395\n380\n410\n\n\n350\n440\n475\n460\n495\n\n\n500\n530\n570\n550\n590\n\n\n750\n650\n700\n665\n720\n\n\n1000\n730\n785\n750\n810\n\n\nTwo Circuits [See Figure 315.60(D)(3), Detail 6.]\n\n\n8\n80\n84\n-\n-\n\n\n6\n100\n105\n105\n115\n\n\n4\n130\n140\n135\n145\n\n\n2\n165\n180\n170\n185\n\n\n1\n185\n200\n195\n210\n\n\n1/0\n215\n230\n220\n235\n\n\n2/0\n240\n260\n250\n270\n\n\n3/0\n275\n295\n280\n305\n\n\n4/0\n310\n335\n320\n345\n\n\n250\n340\n365\n350\n375\n\n\n350\n410\n440\n420\n450\n\n\n500\n490\n525\n500\n535\n\n\n750\n595\n640\n605\n650\n\n\n1000\n665\n715\n675\n730\n\n\n\nNote: Refer to 315.60(F) for basis of ampacities and Table 315.10(A) for the temperature rating of the conductor.\nTable 315.60(C)(18) Ampacities of Three Insulated Aluminum Conductors Cabled Within an Overall Covering (Three-Conductor Cable), Directly Buried in Earth\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\nOne Circuit [See Figure 315.60(D)(3), Detail 5.]\n\n\n8\n65\n70\n-\n-\n\n\n6\n80\n88\n90\n95\n\n\n4\n105\n115\n115\n125\n\n\n2\n140\n150\n145\n155\n\n\n1\n155\n170\n165\n175\n\n\n1/0\n180\n190\n185\n200\n\n\n2/0\n205\n220\n210\n225\n\n\n3/0\n230\n250\n240\n260\n\n\n4/0\n260\n280\n270\n295\n\n\n250\n285\n310\n300\n320\n\n\n350\n345\n375\n360\n390\n\n\n500\n420\n450\n435\n470\n\n\n750\n520\n560\n540\n580\n\n\n1000\n600\n650\n620\n665\n\n\nTwo Circuits [See Figure 315.60(D)(3), Detail 6.]\n\n\n8\n60\n66\n-\n-\n\n\n6\n75\n83\n80\n95\n\n\n4\n100\n110\n105\n115\n\n\n2\n130\n140\n135\n145\n\n\n1\n145\n155\n150\n165\n\n\n1/0\n165\n180\n170\n185\n\n\n2/0\n190\n205\n195\n210\n\n\n3/0\n215\n230\n220\n240\n\n\n4/0\n245\n260\n250\n270\n\n\n250\n265\n285\n275\n295\n\n\n350\n320\n345\n330\n355\n\n\n500\n385\n415\n395\n425\n\n\n750\n480\n515\n485\n525\n\n\n1000\n550\n590\n560\n600\n\n\n\nNote: Refer to 315.60(F) for basis of ampacities and Table 315.10(A) for the temperature rating of the conductor.\nTable 315.60(C)(19) Ampacities of Three Triplexed Single Insulated Copper Conductors Directly Buried in Earth\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\nOne Circuit, Three Conductors [See Figure 315.60(D)(3), Detail 7.]\n\n\n8\n90\n95\n-\n-\n\n\n6\n120\n130\n115\n120\n\n\n4\n150\n165\n150\n160\n\n\n2\n195\n205\n190\n205\n\n\n1\n225\n240\n215\n230\n\n\n1/0\n255\n270\n245\n260\n\n\n2/0\n290\n310\n275\n295\n\n\n3/0\n330\n360\n315\n340\n\n\n4/0\n375\n405\n360\n385\n\n\n250\n410\n445\n390\n410\n\n\n350\n490\n580\n470\n505\n\n\n500\n590\n635\n565\n605\n\n\n750\n725\n780\n685\n740\n\n\n1000\n825\n885\n770\n830\n\n\nTwo Circuits, Six Conductors [See Figure 315.60(D)(3), Detail 8.]\n\n\n8\n85\n90\n-\n-\n\n\n6\n110\n115\n105\n115\n\n\n4\n140\n150\n140\n150\n\n\n2\n180\n195\n175\n190\n\n\n1\n205\n220\n200\n215\n\n\n1/0\n235\n250\n225\n240\n\n\n2/0\n265\n285\n255\n275\n\n\n3/0\n300\n320\n290\n315\n\n\n4/0\n340\n365\n325\n350\n\n\n250\n370\n395\n355\n380\n\n\n350\n445\n480\n425\n455\n\n\n500\n535\n575\n510\n545\n\n\n750\n650\n700\n615\n660\n\n\n1000\n740\n795\n690\n745\n\n\n\nNote: Refer to 315.60(F) for basis of ampacities and Table 315.10(A) for the temperature rating of the conductor.\nTable 315.60(C)(20) Ampacities of Three Triplexed Single Insulated Aluminum Conductors Directly Buried in Earth\n\n\n\nConductor Size (AWG or kcmil)\nTemperature Rating of Conductor\n\n\n2001\u20145000 Volts Ampacity\n5001\u201435,000 Volts Ampacity\n\n\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n90\u00b0C (194\u00b0F) Type MV-90\n105\u00b0C (221\u00b0F) Type MV-105\n\n\n\n\nOne Circuit, Three Conductors [See Figure 315.60(D)(3), Detail 7.]\n\n\n8\n70\n75\n-\n-\n\n\n6\n90\n100\n90\n95\n\n\n4\n120\n130\n115\n125\n\n\n2\n155\n165\n145\n155\n\n\n1\n175\n190\n165\n175\n\n\n1/0\n200\n210\n190\n205\n\n\n2/0\n225\n240\n215\n230\n\n\n3/0\n255\n275\n245\n265\n\n\n4/0\n290\n310\n280\n305\n\n\n250\n320\n350\n305\n325\n\n\n350\n385\n420\n370\n400\n\n\n500\n465\n500\n445\n480\n\n\n750\n580\n625\n550\n590\n\n\n1000\n670\n725\n635\n680\n\n\nTwo Circuits, Six Conductors [See Figure 315.60(D)(3), Detail 8.]\n\n\n8\n65\n70\n-\n-\n\n\n6\n85\n95\n85\n90\n\n\n4\n110\n120\n105\n115\n\n\n2\n140\n150\n135\n145\n\n\n1\n160\n170\n155\n170\n\n\n1/0\n180\n195\n175\n190\n\n\n2/0\n205\n220\n200\n215\n\n\n3/0\n235\n250\n225\n245\n\n\n4/0\n265\n285\n255\n275\n\n\n250\n290\n310\n280\n300\n\n\n350\n350\n375\n335\n360\n\n\n500\n420\n455\n405\n435\n\n\n750\n520\n560\n485\n525\n\n\n1000\n600\n645\n565\n605\n\n\n\nNote: Refer to 315.60(F) for basis of ampacities and Table 315.10(A) for the temperature rating of the conductor. [315.60_(C)](https://2023.antflix.net#315.60_(C))", + "displayTitle": "(C) Tables", + "children": [], + "url": "https://2023.antflix.net#315.60_(C)" + }, + { + "displayTitle": "(D) Ampacity Adjustment", + "children": [ + { + "body": "Ampacities shown in Table 315.60(C)(3), Table 315.60(C)(4), Table 315.60(C)(15), and Table 315.60(C)(16) shall apply for cables with shields grounded at one point only. Where shields for these cables are grounded at more than one point, ampacities shall be adjusted to take into consideration the heating due to shield currents. Informational Note: Tables other than those listed contain the ampacity of cables with shields grounded at multiple points. [315.60_(D)_(1)](https://2023.antflix.net#315.60_(D)_(1))", + "displayTitle": "(1) Grounded Shields", + "children": [], + "url": "https://2023.antflix.net#315.60_(D)_(1)" + }, + { + "body": "Where the burial depth of direct burial or electrical duct bank circuits is modified from the values shown in a figure or table, ampacities shall be permitted to be modified as indicated in 315.60(D)(2)(a) and (D)(2)(b). No ampacity adjustments shall be required where the burial depth is decreased. Where burial depths are increased in part(s) of an electrical duct run, a decrease in ampacity of the conductors shall not be required, provided the total length of parts of the duct run increased in depth is less than 25 percent of the total run length.Where burial depths are deeper than shown in a specific underground ampacity table or figure, an ampacity derating factor of 6 percent per 300 mm (1 ft) increase in depth for all values of rho shall be permitted. [315.60_(D)_(2)](https://2023.antflix.net#315.60_(D)_(2))", + "displayTitle": "(2) Burial Depth", + "children": [], + "url": "https://2023.antflix.net#315.60_(D)_(2)" + }, + { + "body": "At locations where electrical ducts enter equipment enclosures from underground, spacing between such ducts, as shown in Figure 315.60(D)(3), shall be permitted to be reduced without requiring the ampacity of conductors therein to be reduced.\nFIGURE 315.60(D)(3) Cable Installation Dimensions for Use with Table 315.60(C)(11) Through Table 315.60(C)(20). [315.60_(D)_(3)](https://2023.antflix.net#315.60_(D)_(3))", + "displayTitle": "(3) Electrical Ducts Entering Equipment Enclosures", + "children": [], + "url": "https://2023.antflix.net#315.60_(D)_(3)" + }, + { + "body": "Ampacities for ambient temperatures other than those specified in the ampacity tables shall be corrected in accordance with Table 315.60(D)(4) or shall be permitted to be calculated using the following equation:\n\n\n\n[315.60(D)(4)]\n\n\n\n\n\n\nwhere:\n\n\n\nI'\n=\nampacity corrected for ambient temperature\n\n\nI\n=\nampacity shown in the table for Tc and Ta\n\n\nTc\n=\ntemperature rating of conductor (\u00b0C)\n\n\nTa'\n=\nnew ambient temperature (\u00b0C)\n\n\nTa\n=\nambient temperature used in the table (\u00b0C)\n\n\n\nInformational Note: See 110.40 for ambient temperature adjustments for terminals.\nTable 315.60(D)(4) Ambient Temperature Correction Factors\n\n\n\nFor ambient temperatures other than 40\u00b0C (104\u00b0F), multiply the allowable ampacities specified in the ampacity tables by the appropriate factor shown below.\n\n\nAmbient Temperature (\u00b0C)\nTemperature Rating of Conductor\nAmbient Temperature (\u00b0F)\n\n\n90\u00b0C\n105\u00b0C\n\n\n\n\n10 or less\n1.26\n1.21\n50 or less\n\n\n11\u201415\n1.22\n1.18\n51\u201459\n\n\n16\u201420\n1.18\n1.14\n60\u201468\n\n\n21\u201425\n1.14\n1.11\n69\u201477\n\n\n26\u201430\n1.10\n1.07\n78\u201486\n\n\n31\u201435\n1.05\n1.04\n87\u201495\n\n\n36\u201440\n1.00\n1.00\n96\u2014104\n\n\n41\u201445\n0.95\n0.96\n105\u2014113\n\n\n46\u201450\n0.89\n0.92\n114\u2014122\n\n\n51\u201455\n0.84\n0.88\n123\u2014131\n\n\n56\u201460\n0.77\n0.83\n132\u2014140\n\n\n61\u201465\n0.71\n0.78\n141\u2014149\n\n\n66\u201470\n0.63\n0.73\n150\u2014158\n\n\n71\u201475\n0.55\n0.68\n159\u2014167\n\n\n76\u201480\n0.45\n0.62\n168\u2014176\n\n\n81\u201485\n0.32\n0.55\n177\u2014185\n\n\n86\u201490\n-\n0.48\n186\u2014194\n\n\n91\u201495\n-\n0.39\n195\u2014203\n\n\n96\u2014100\n-\n0.28\n204\u2014212\n\n\n [315.60_(D)_(4)](https://2023.antflix.net#315.60_(D)_(4))", + "displayTitle": "(4) Ambient Temperature Correction", + "children": [], + "url": "https://2023.antflix.net#315.60_(D)_(4)" + } + ], + "url": "https://2023.antflix.net#315.60_(D)" + }, + { + "body": "Ampacities for conductors and cables in air shall be as specified in Table 315.60(C)(1) through Table 315.60(C)(10). Ampacities shall be based on the following: Conductor temperatures of 90\u00b0C (194\u00b0F) and 105\u00b0C (221\u00b0F)Ambient air temperature of 40\u00b0C (104\u00b0F)Informational Note: See 315.60(D)(4) where the ambient air temperature is other than 40\u00b0C (104\u00b0F). [315.60_(E)](https://2023.antflix.net#315.60_(E))", + "displayTitle": "(E) Ampacity in Air", + "children": [], + "url": "https://2023.antflix.net#315.60_(E)" + }, + { + "body": "Ampacities for conductors and cables in underground electrical ducts and direct buried in earth shall be as specified in Table 315.60(C)(11) through Table 315.60(C)(20). Ampacities shall be based on the following: Ambient earth temperature of 20\u00b0C (68\u00b0F)Arrangement in accordance with Figure 315.60(D)(3)100 percent load factorThermal resistance (Rho) of 90Conductor temperatures 90\u00b0C (194\u00b0F) and 105\u00b0C (221\u00b0F)Minimum burial depths to the top electrical ducts or cables shall be in accordance with 305.15.Maximum depth to the top of electrical duct banks shall be 750 mm (30 in.), and maximum depth to the top of direct-buried cables shall be 900 mm (36 in.). [315.60_(F)](https://2023.antflix.net#315.60_(F))", + "displayTitle": "(F) Ampacity in Underground Electrical Ducts and Direct Buried in Earth", + "children": [], + "url": "https://2023.antflix.net#315.60_(F)" + } + ], + "url": "https://2023.antflix.net#315.60" + } + ], + "url": "https://2023.antflix.net#315" + }, + { + "displayTitle": "Article 320 Armored Cable: Type AC", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_13_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for armored cable, Type AC. [320.1](https://2023.antflix.net#320.1)", + "displayTitle": "320.1 Scope", + "children": [], + "url": "https://2023.antflix.net#320.1" + }, + { + "body": "Type AC cable and associated fittings shall be listed. [320.6](https://2023.antflix.net#320.6)", + "displayTitle": "320.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#320.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_13_II" + }, + { + "body": "Type AC cable shall be permitted as follows: For feeders and branch circuits in both exposed and concealed installationsIn cable traysIn dry locationsEmbedded in plaster finish on brick or other masonry, except in damp or wet locationsTo be run or fished in the air voids of masonry block or tile walls where such walls are not exposed or subject to excessive moisture or dampnessInformational Note: The \"Uses Permitted\" is not an all-inclusive list. [320.10](https://2023.antflix.net#320.10)", + "displayTitle": "320.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#320.10" + }, + { + "body": "Type AC cable shall not be used as follows: Where subject to physical damageIn damp or wet locationsIn air voids of masonry block or tile walls where such walls are exposed or subject to excessive moisture or dampnessWhere exposed to corrosive conditionsEmbedded in plaster finish on brick or other masonry in damp or wet locations [320.12](https://2023.antflix.net#320.12)", + "displayTitle": "320.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#320.12" + }, + { + "body": "Exposed runs of cable, except as provided in 300.11(B), shall closely follow the surface of the building finish or of running boards. Exposed runs shall also be permitted to be installed on the underside of joists where supported at each joist and located so as not to be subject to physical damage. [320.15](https://2023.antflix.net#320.15)", + "displayTitle": "320.15 Exposed Work", + "children": [], + "url": "https://2023.antflix.net#320.15" + }, + { + "body": "Type AC cable shall be protected in accordance with 300.4(A), (C), and (D) where installed through or parallel to framing members. [320.17](https://2023.antflix.net#320.17)", + "displayTitle": "320.17 Through or Parallel to Framing Members", + "children": [], + "url": "https://2023.antflix.net#320.17" + }, + { + "body": "Type AC cables in accessible attics or roof spaces shall be installed as specified in 320.23(A) and (B). [320.23](https://2023.antflix.net#320.23)", + "displayTitle": "320.23 In Accessible Attics", + "children": [ + { + "body": "Where run across the top of framing members, or across the face of rafters or studding within 2.1 m (7 ft) of the floor or horizontal surface, the cable shall be protected by guard strips that are at least as high as the cable. Where this space is not accessible by permanently installed stairs or ladders, protection shall only be required within 1.8 m (6 ft) of the nearest edge of the scuttle hole or attic entrance. [320.23_(A)](https://2023.antflix.net#320.23_(A))", + "displayTitle": "(A) Cables Run Across the Top of Framing Members", + "children": [], + "url": "https://2023.antflix.net#320.23_(A)" + }, + { + "body": "Where the cable is installed parallel to the sides of rafters, studs, or ceiling or floor joists, neither guard strips nor running boards shall be required, and the installation shall also comply with 300.4(D). [320.23_(B)](https://2023.antflix.net#320.23_(B))", + "displayTitle": "(B) Cable Installed Parallel to Framing Members", + "children": [], + "url": "https://2023.antflix.net#320.23_(B)" + } + ], + "url": "https://2023.antflix.net#320.23" + }, + { + "body": "Bends in Type AC cable shall be made such that the cable is not damaged. The radius of the curve of the inner edge of any bend shall not be less than five times the diameter of the Type AC cable. [320.24](https://2023.antflix.net#320.24)", + "displayTitle": "320.24 Bending Radius", + "children": [], + "url": "https://2023.antflix.net#320.24" + }, + { + "displayTitle": "320.30 Securing and Supporting", + "children": [ + { + "body": "Type AC cable shall be supported and secured by staples; cable ties listed and identified for securement and support; straps, hangers, or similar fittings; or other approved means designed and installed so as not to damage the cable. Type AC cable fittings shall be permitted as a means of cable support. [320.30_(A)](https://2023.antflix.net#320.30_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#320.30_(A)" + }, + { + "body": "Unless otherwise permitted, Type AC cable shall be secured within 300 mm (12 in.) of every outlet box, junction box, cabinet, or fitting and at intervals not exceeding 1.4 m (41/2 ft). [320.30_(B)](https://2023.antflix.net#320.30_(B))", + "displayTitle": "(B) Securing", + "children": [], + "url": "https://2023.antflix.net#320.30_(B)" + }, + { + "body": "Unless otherwise permitted, Type AC cable shall be supported at intervals not exceeding 1.4 m (41/2 ft). Horizontal runs of Type AC cable installed in wooden or metal framing members or similar supporting means shall be considered supported and secured where such support does not exceed 1.4 m (41/2 ft) intervals. [320.30_(C)](https://2023.antflix.net#320.30_(C))", + "displayTitle": "(C) Supporting", + "children": [], + "url": "https://2023.antflix.net#320.30_(C)" + }, + { + "body": "Type AC cable shall be permitted to be unsupported and unsecured where the cable complies with any of the following: Is fished between access points through concealed spaces in finished buildings or structures and supporting is impracticableIs not more than 600 mm (2 ft) in length at terminals where flexibility is necessaryIs not more than 1.8 m (6 ft) in length from the last point of cable support to the point of connection to a luminaire(s) or other electrical equipment and the cable and point of connection are within an accessible ceiling [320.30_(D)](https://2023.antflix.net#320.30_(D))", + "displayTitle": "(D) Unsupported Cables", + "children": [], + "url": "https://2023.antflix.net#320.30_(D)" + } + ], + "url": "https://2023.antflix.net#320.30" + }, + { + "body": "At all points where the armor of AC cable terminates, a fitting shall be provided to protect wires from abrasion, unless the design of the outlet boxes or fittings is such as to afford equivalent protection, and, in addition, an insulating bushing or its equivalent protection shall be provided between the conductors and the armor. The connector or clamp by which the Type AC cable is fastened to boxes or cabinets shall be of such design that the insulating bushing or its equivalent will be visible for inspection. Where change is made from Type AC cable to other cable or raceway wiring methods, a box, fitting, or conduit body shall be installed at junction points as required in 300.15. [320.40](https://2023.antflix.net#320.40)", + "displayTitle": "320.40 Boxes and Fittings", + "children": [], + "url": "https://2023.antflix.net#320.40" + }, + { + "body": "The ampacity shall be determined in accordance with 310.14. [320.80](https://2023.antflix.net#320.80)", + "displayTitle": "320.80 Ampacity", + "children": [ + { + "body": "Armored cable installed in thermal insulation shall have conductors rated at 90\u00b0C (194\u00b0F). The ampacity of cable installed in these applications shall not exceed that of a 60\u00b0C (140\u00b0F) rated conductor. The 90\u00b0C (194\u00b0F) rating shall be permitted to be used for ampacity adjustment and correction calculations; however, the ampacity shall not exceed that of a 60\u00b0C (140\u00b0F) rated conductor. Where more than two Type AC cables containing two or more current-carrying conductors in each cable are installed in contact with thermal insulation, caulk, or sealing foam without maintaining spacing between cables, the ampacity of each conductor shall be adjusted in accordance with Table 310.15(C)(1). [320.80_(A)](https://2023.antflix.net#320.80_(A))", + "displayTitle": "(A) Thermal Insulation", + "children": [], + "url": "https://2023.antflix.net#320.80_(A)" + }, + { + "body": "The ampacity of Type AC cable installed in cable tray shall be determined in accordance with 392.80(A). [320.80_(B)](https://2023.antflix.net#320.80_(B))", + "displayTitle": "(B) Cable Tray", + "children": [], + "url": "https://2023.antflix.net#320.80_(B)" + } + ], + "url": "https://2023.antflix.net#320.80" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_11_III" + }, + { + "body": "Type AC cable shall have an armor of flexible metal tape and shall have an internal bonding strip of copper or aluminum in intimate contact with the armor for its entire length. [320.100](https://2023.antflix.net#320.100)", + "displayTitle": "320.100 Construction", + "children": [], + "url": "https://2023.antflix.net#320.100" + }, + { + "body": "Insulated conductors shall be of a type listed in Table 310.4(1) or those identified for use in this cable. In addition, the conductors shall have an overall moisture-resistant and fire-retardant fibrous covering. For Type ACT, a moisture-resistant fibrous covering shall be required only on the individual conductors. [320.104](https://2023.antflix.net#320.104)", + "displayTitle": "320.104 Conductors", + "children": [], + "url": "https://2023.antflix.net#320.104" + }, + { + "body": "Type AC cable shall provide an adequate path for fault current as required by 250.4(A)(5) or (B)(4) to act as an equipment grounding conductor. [320.108](https://2023.antflix.net#320.108)", + "displayTitle": "320.108 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#320.108" + }, + { + "body": "The cable shall be marked in accordance with 310.8, except that Type AC shall have ready identification of the manufacturer by distinctive external markings on the cable armor throughout its entire length. [320.120](https://2023.antflix.net#320.120)", + "displayTitle": "320.120 Marking", + "children": [], + "url": "https://2023.antflix.net#320.120" + } + ], + "url": "https://2023.antflix.net#320" + }, + { + "displayTitle": "Article 322 Flat Cable Assemblies: Type FC", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_14_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for flat cable assemblies, Type FC. [322.1](https://2023.antflix.net#322.1)", + "displayTitle": "322.1 Scope", + "children": [], + "url": "https://2023.antflix.net#322.1" + }, + { + "body": "Type FC and associated fittings shall be listed. [322.6](https://2023.antflix.net#322.6)", + "displayTitle": "322.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#322.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_14_II" + }, + { + "body": "Flat cable assemblies shall be permitted only as follows: As branch circuits to supply suitable tap devices for lighting, small appliances, or small power loads. The rating of the branch circuit shall not exceed 30 amperes.Where installed for exposed work.In locations where they will not be subjected to physical damage. Where a flat cable assembly is installed less than 2.5 m (8 ft) above the floor or fixed working platform, it shall be protected by a cover identified for the use.In surface metal raceways identified for the use. The channel portion of the surface metal raceway systems shall be installed as complete systems before the flat cable assemblies are pulled into the raceways. [322.10](https://2023.antflix.net#322.10)", + "displayTitle": "322.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#322.10" + }, + { + "body": "Flat cable assemblies shall not be used as follows: Where exposed to corrosive conditions, unless suitable for the applicationIn hoistways or on elevators or escalatorsIn any hazardous (classified) location, except as specifically permitted by other articles in this Code.Outdoors or in wet or damp locations unless identified for the use [322.12](https://2023.antflix.net#322.12)", + "displayTitle": "322.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#322.12" + }, + { + "body": "The flat cable assemblies shall be supported by means of their special design features, within the surface metal raceways. The surface metal raceways shall be supported as required for the specific raceway to be installed. [322.30](https://2023.antflix.net#322.30)", + "displayTitle": "322.30 Securing and Supporting", + "children": [], + "url": "https://2023.antflix.net#322.30" + }, + { + "displayTitle": "322.40 Boxes and Fittings", + "children": [ + { + "body": "Each flat cable assembly dead end shall be terminated in an end-cap device identified for the use. The dead-end fitting for the enclosing surface metal raceway shall be identified for the use. [322.40_(A)](https://2023.antflix.net#322.40_(A))", + "displayTitle": "(A) Dead Ends", + "children": [], + "url": "https://2023.antflix.net#322.40_(A)" + }, + { + "body": "Luminaire hangers installed with the flat cable assemblies shall be identified for the use. [322.40_(B)](https://2023.antflix.net#322.40_(B))", + "displayTitle": "(B) Luminaire Hangers", + "children": [], + "url": "https://2023.antflix.net#322.40_(B)" + }, + { + "body": "Fittings to be installed with flat cable assemblies shall be designed and installed to prevent physical damage to the cable assemblies. [322.40_(C)](https://2023.antflix.net#322.40_(C))", + "displayTitle": "(C) Fittings", + "children": [], + "url": "https://2023.antflix.net#322.40_(C)" + }, + { + "body": "All extensions from flat cable assemblies shall be made by approved wiring methods, within the junction boxes, installed at either end of the flat cable assembly runs. [322.40_(D)](https://2023.antflix.net#322.40_(D))", + "displayTitle": "(D) Extensions", + "children": [], + "url": "https://2023.antflix.net#322.40_(D)" + } + ], + "url": "https://2023.antflix.net#322.40" + }, + { + "displayTitle": "322.56 Splices and Taps", + "children": [ + { + "body": "Splices shall be made in listed junction boxes. [322.56_(A)](https://2023.antflix.net#322.56_(A))", + "displayTitle": "(A) Splices", + "children": [], + "url": "https://2023.antflix.net#322.56_(A)" + }, + { + "body": "Taps shall be made between any phase conductor and the grounded conductor or any other phase conductor by means of devices and fittings identified for the use. Tap devices shall be rated at not less than 15 amperes, or more than 300 volts to ground, and shall be marked in accordance with 322.120(C). [322.56_(B)](https://2023.antflix.net#322.56_(B))", + "displayTitle": "(B) Taps", + "children": [], + "url": "https://2023.antflix.net#322.56_(B)" + } + ], + "url": "https://2023.antflix.net#322.56" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_12_III" + }, + { + "body": "Flat cable assemblies shall consist of two, three, four, or five conductors. [322.100](https://2023.antflix.net#322.100)", + "displayTitle": "322.100 Construction", + "children": [], + "url": "https://2023.antflix.net#322.100" + }, + { + "body": "Flat cable assemblies shall have conductors of 10 AWG special stranded copper wires. [322.104](https://2023.antflix.net#322.104)", + "displayTitle": "322.104 Conductors", + "children": [], + "url": "https://2023.antflix.net#322.104" + }, + { + "body": "The entire flat cable assembly shall be formed to provide a suitable insulation covering all the conductors and using one of the materials recognized in Table 310.4(1) for general branch-circuit wiring. [322.112](https://2023.antflix.net#322.112)", + "displayTitle": "322.112 Insulation", + "children": [], + "url": "https://2023.antflix.net#322.112" + }, + { + "displayTitle": "322.120 Marking", + "children": [ + { + "body": "In addition to the provisions of 310.8, Type FC cable shall have the temperature rating durably marked on the surface at intervals not exceeding 600 mm (24 in.). [322.120_(A)](https://2023.antflix.net#322.120_(A))", + "displayTitle": "(A) Temperature Rating", + "children": [], + "url": "https://2023.antflix.net#322.120_(A)" + }, + { + "body": "The grounded conductor shall be identified throughout its length by means of a distinctive and durable white or gray marking. Informational Note: The color gray may have been used in the past as an ungrounded conductor. Care should be taken when working on existing systems. [322.120_(B)](https://2023.antflix.net#322.120_(B))", + "displayTitle": "(B) Identification of Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#322.120_(B)" + }, + { + "body": "Terminal blocks identified for the use shall have distinctive and durable markings for color or word coding. The grounded conductor section shall have a white marking or other suitable designation. The next adjacent section of the terminal block shall have a black marking or other suitable designation. The next section shall have a red marking or other suitable designation. The final or outer section, opposite the grounded conductor section of the terminal block, shall have a blue marking or other suitable designation. [322.120_(C)](https://2023.antflix.net#322.120_(C))", + "displayTitle": "(C) Terminal Block Identification", + "children": [], + "url": "https://2023.antflix.net#322.120_(C)" + } + ], + "url": "https://2023.antflix.net#322.120" + } + ], + "url": "https://2023.antflix.net#322" + }, + { + "displayTitle": "Article 324 Flat Conductor Cable: Type FCC", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_15_I" + }, + { + "body": "This article covers a field-installed wiring system for branch circuits incorporating Type FCC cable and associated accessories as defined by the article. The wiring system is designed for installation under carpet squares. [324.1](https://2023.antflix.net#324.1)", + "displayTitle": "324.1 Scope", + "children": [], + "url": "https://2023.antflix.net#324.1" + }, + { + "body": "Type FCC cable and associated fittings shall be listed. [324.6](https://2023.antflix.net#324.6)", + "displayTitle": "324.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#324.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_15_II" + }, + { + "displayTitle": "324.10 Uses Permitted", + "children": [ + { + "body": "Use of FCC systems shall be permitted both for general-purpose and appliance branch circuits and for individual branch circuits. [324.10_(A)](https://2023.antflix.net#324.10_(A))", + "displayTitle": "(A) Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#324.10_(A)" + }, + { + "displayTitle": "(B) Branch-Circuit Ratings", + "children": [ + { + "body": "Voltage between ungrounded conductors shall not exceed 300 volts. Voltage between ungrounded conductors and the grounded conductor shall not exceed 150 volts. [324.10_(B)_(1)](https://2023.antflix.net#324.10_(B)_(1))", + "displayTitle": "(1) Voltage", + "children": [], + "url": "https://2023.antflix.net#324.10_(B)_(1)" + }, + { + "body": "General-purpose and appliance branch circuits shall have ratings not exceeding 20 amperes. Individual branch circuits shall have ratings not exceeding 30 amperes. [324.10_(B)_(2)](https://2023.antflix.net#324.10_(B)_(2))", + "displayTitle": "(2) Current", + "children": [], + "url": "https://2023.antflix.net#324.10_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#324.10_(B)" + }, + { + "body": "Use of FCC systems shall be permitted on hard, sound, smooth, continuous floor surfaces made of concrete, ceramic, or composition flooring, wood, and similar materials. [324.10_(C)](https://2023.antflix.net#324.10_(C))", + "displayTitle": "(C) Floors", + "children": [], + "url": "https://2023.antflix.net#324.10_(C)" + }, + { + "body": "Use of FCC systems shall be permitted on wall surfaces in surface metal raceways. [324.10_(D)](https://2023.antflix.net#324.10_(D))", + "displayTitle": "(D) Walls", + "children": [], + "url": "https://2023.antflix.net#324.10_(D)" + }, + { + "body": "Use of FCC systems in damp locations shall be permitted. [324.10_(E)](https://2023.antflix.net#324.10_(E))", + "displayTitle": "(E) Damp Locations", + "children": [], + "url": "https://2023.antflix.net#324.10_(E)" + }, + { + "body": "Materials used for floors heated in excess of 30\u00b0C (86\u00b0F) shall be identified as suitable for use at these temperatures. [324.10_(F)](https://2023.antflix.net#324.10_(F))", + "displayTitle": "(F) Heated Floors", + "children": [], + "url": "https://2023.antflix.net#324.10_(F)" + }, + { + "body": "Any portion of an FCC system with a height above floor level exceeding 2.3 mm (0.090 in.) shall be tapered or feathered at the edges to floor level. [324.10_(G)](https://2023.antflix.net#324.10_(G))", + "displayTitle": "(G) System Height", + "children": [], + "url": "https://2023.antflix.net#324.10_(G)" + } + ], + "url": "https://2023.antflix.net#324.10" + }, + { + "body": "FCC systems shall not be used in the following locations: Outdoors or in wet locationsWhere subject to corrosive vaporsIn any hazardous (classified) locationIn residential buildingsIn school and hospital buildings, other than administrative office areas [324.12](https://2023.antflix.net#324.12)", + "displayTitle": "324.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#324.12" + }, + { + "body": "Crossings of more than two Type FCC cable runs shall not be permitted at any one point. Crossings of a Type FCC cable over or under a flat communications or signal cable shall be permitted. In each case, a grounded layer of metal shielding shall separate the two cables, and crossings of more than two flat cables shall not be permitted at any one point. [324.18](https://2023.antflix.net#324.18)", + "displayTitle": "324.18 Crossings", + "children": [], + "url": "https://2023.antflix.net#324.18" + }, + { + "body": "All FCC system components shall be firmly anchored to the floor or wall using an adhesive or mechanical anchoring system identified for this use. Floors shall be prepared to ensure adherence of the FCC system to the floor until the carpet squares are placed. [324.30](https://2023.antflix.net#324.30)", + "displayTitle": "324.30 Securing and Supporting", + "children": [], + "url": "https://2023.antflix.net#324.30" + }, + { + "displayTitle": "324.40 Boxes and Fittings", + "children": [ + { + "body": "All Type FCC cable connections shall use connectors identified for their use, installed such that electrical continuity, insulation, and sealing against dampness and liquid spillage are provided. All bare cable ends shall be insulated and sealed against dampness and liquid spillage using listed insulating ends. [324.40_(A)](https://2023.antflix.net#324.40_(A))", + "displayTitle": "(A) Cable Connections and Insulating Ends", + "children": [], + "url": "https://2023.antflix.net#324.40_(A)" + }, + { + "body": "All receptacles and connections shall be constructed and installed so as to maintain proper polarization of the system. [324.40_(B)](https://2023.antflix.net#324.40_(B))", + "displayTitle": "(B) Polarization of Connections", + "children": [], + "url": "https://2023.antflix.net#324.40_(B)" + }, + { + "displayTitle": "(C) Shields", + "children": [ + { + "body": "A metal top shield shall be installed over all floor-mounted Type FCC cable, connectors, and insulating ends. The top shield shall completely cover all cable runs, corners, connectors, and ends. [324.40_(C)_(1)](https://2023.antflix.net#324.40_(C)_(1))", + "displayTitle": "(1) Top Shield", + "children": [], + "url": "https://2023.antflix.net#324.40_(C)_(1)" + }, + { + "body": "A bottom shield shall be installed beneath all Type FCC cable, connectors, and insulating ends. [324.40_(C)_(2)](https://2023.antflix.net#324.40_(C)_(2))", + "displayTitle": "(2) Bottom Shield", + "children": [], + "url": "https://2023.antflix.net#324.40_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#324.40_(C)" + }, + { + "body": "Power feed, grounding connection, and shield system connection between the FCC system and other wiring systems shall be accomplished in a transition assembly identified for this use. [324.40_(D)](https://2023.antflix.net#324.40_(D))", + "displayTitle": "(D) Connection to Other Systems", + "children": [], + "url": "https://2023.antflix.net#324.40_(D)" + }, + { + "body": "Metal shields shall be connected to each other and to boxes, receptacle housings, self-contained devices, and transition assemblies using metal-shield connectors. [324.40_(E)](https://2023.antflix.net#324.40_(E))", + "displayTitle": "(E) Metal-Shield Connectors", + "children": [], + "url": "https://2023.antflix.net#324.40_(E)" + } + ], + "url": "https://2023.antflix.net#324.40" + }, + { + "body": "Floor-mounted Type FCC cable, cable connectors, and insulating ends shall be covered with carpet squares not larger than 1.0 m (39.37 in.) square. Carpet squares that are adhered to the floor shall be attached with release-type adhesives. [324.41](https://2023.antflix.net#324.41)", + "displayTitle": "324.41 Floor Coverings", + "children": [], + "url": "https://2023.antflix.net#324.41" + }, + { + "displayTitle": "324.42 Devices", + "children": [ + { + "body": "All receptacles, receptacle housings, and self-contained devices used with the FCC system shall be identified for this use and shall be connected to the Type FCC cable and metal shields. Connection from any equipment grounding conductor of the Type FCC cable shall be made to the shield system at each receptacle. [324.42_(A)](https://2023.antflix.net#324.42_(A))", + "displayTitle": "(A) Receptacles", + "children": [], + "url": "https://2023.antflix.net#324.42_(A)" + }, + { + "body": "Receptacle housings and self-contained devices designed either for floor mounting or for in-wall or on-wall mounting shall be permitted for use with the FCC system. Receptacle housings and self-contained devices shall incorporate means for facilitating entry and termination of Type FCC cable and for electrically connecting the housing or device with the metal shield. Receptacles and self-contained devices shall comply with 406.4. Power and communications outlets installed together in common housing shall be permitted in accordance with 800.133(A)(3), Exception No. 2. [324.42_(B)](https://2023.antflix.net#324.42_(B))", + "displayTitle": "(B) Receptacles and Housings", + "children": [], + "url": "https://2023.antflix.net#324.42_(B)" + } + ], + "url": "https://2023.antflix.net#324.42" + }, + { + "displayTitle": "324.56 Splices and Taps", + "children": [ + { + "body": "Alterations to FCC systems shall be permitted. New cable connectors shall be used at new connection points to make alterations. It shall be permitted to leave unused cable runs and associated cable connectors in place and energized. All cable ends shall be covered with insulating ends. [324.56_(A)](https://2023.antflix.net#324.56_(A))", + "displayTitle": "(A) FCC Systems Alterations", + "children": [], + "url": "https://2023.antflix.net#324.56_(A)" + }, + { + "body": "All transition assemblies shall be identified for their use. Each assembly shall incorporate means for facilitating entry of the Type FCC cable into the assembly, for connecting the Type FCC cable to grounded conductors, and for electrically connecting the assembly to the metal cable shields and to equipment grounding conductors. [324.56_(B)](https://2023.antflix.net#324.56_(B))", + "displayTitle": "(B) Transition Assemblies", + "children": [], + "url": "https://2023.antflix.net#324.56_(B)" + } + ], + "url": "https://2023.antflix.net#324.56" + }, + { + "body": "All metal shields, boxes, receptacle housings, and self-contained devices shall be electrically continuous to the equipment grounding conductor of the supplying branch circuit. All such electrical connections shall be made with connectors identified for this use. The electrical resistivity of such shield system shall not be more than that of one conductor of the Type FCC cable used in the installation. [324.60](https://2023.antflix.net#324.60)", + "displayTitle": "324.60 Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#324.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_13_III" + }, + { + "displayTitle": "324.100 Construction", + "children": [ + { + "body": "Type FCC cable shall be listed for use with the FCC system and shall consist of three, four, or five flat copper conductors, one of which shall be an equipment grounding conductor. [324.100_(A)](https://2023.antflix.net#324.100_(A))", + "displayTitle": "(A) Type FCC Cable", + "children": [], + "url": "https://2023.antflix.net#324.100_(A)" + }, + { + "displayTitle": "(B) Shields", + "children": [ + { + "body": "All top and bottom shields shall be of designs and materials identified for their use. Top shields shall be metal. Both metallic and nonmetallic materials shall be permitted for bottom shields. [324.100_(B)_(1)](https://2023.antflix.net#324.100_(B)_(1))", + "displayTitle": "(1) Materials and Dimensions", + "children": [], + "url": "https://2023.antflix.net#324.100_(B)_(1)" + }, + { + "body": "Metal shields shall have cross-sectional areas that provide for electrical resistivity of not more than that of one conductor of the Type FCC cable used in the installation. [324.100_(B)_(2)](https://2023.antflix.net#324.100_(B)_(2))", + "displayTitle": "(2) Resistivity", + "children": [], + "url": "https://2023.antflix.net#324.100_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#324.100_(B)" + } + ], + "url": "https://2023.antflix.net#324.100" + }, + { + "body": "Metal components of the system shall be either corrosion resistant, coated with corrosion-resistant materials, or insulated from contact with corrosive substances. [324.101](https://2023.antflix.net#324.101)", + "displayTitle": "324.101 Corrosion Resistance", + "children": [], + "url": "https://2023.antflix.net#324.101" + }, + { + "body": "The insulating material of the cable shall be moisture resistant and flame retardant. All insulating materials in the FCC systems shall be identified for their use. [324.112](https://2023.antflix.net#324.112)", + "displayTitle": "324.112 Insulation", + "children": [], + "url": "https://2023.antflix.net#324.112" + }, + { + "displayTitle": "324.120 Markings", + "children": [ + { + "body": "Type FCC cable shall be clearly and durably marked on both sides at intervals of not more than 610 mm (24 in.) with the information required by 310.8(A) and with the following additional information: Material of conductorsMaximum temperature ratingAmpacity [324.120_(A)](https://2023.antflix.net#324.120_(A))", + "displayTitle": "(A) Cable Marking", + "children": [], + "url": "https://2023.antflix.net#324.120_(A)" + }, + { + "body": "Conductors shall be clearly and durably identified on both sides throughout their length as specified in 310.6. [324.120_(B)](https://2023.antflix.net#324.120_(B))", + "displayTitle": "(B) Conductor Identification", + "children": [], + "url": "https://2023.antflix.net#324.120_(B)" + } + ], + "url": "https://2023.antflix.net#324.120" + } + ], + "url": "https://2023.antflix.net#324" + }, + { + "displayTitle": "Article 326 Integrated Gas Spacer Cable: Type IGS", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_16_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for integrated gas spacer cable, Type IGS. [326.1](https://2023.antflix.net#326.1)", + "displayTitle": "326.1 Scope", + "children": [], + "url": "https://2023.antflix.net#326.1" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_16_II" + }, + { + "body": "Type IGS cable shall be permitted for use underground, including direct burial in the earth, as the following: Service-entrance conductorsFeeder or branch-circuit conductorsService conductors, underground [326.10](https://2023.antflix.net#326.10)", + "displayTitle": "326.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#326.10" + }, + { + "body": "Type IGS cable shall not be used as interior wiring or be exposed in contact with buildings. [326.12](https://2023.antflix.net#326.12)", + "displayTitle": "326.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#326.12" + }, + { + "body": "Where the coilable nonmetallic conduit and cable are bent for installation purposes or are flexed or bent during shipment or installation, the radius of the curve of the inner edge measured to the inside of the bend shall not be less than specified in Table 326.24. Table 326.24 Minimum Radii of Bends Conduit Size Minimum Radii Metric Designator Trade Size mm in. 53 2 600 24 78 3 900 35 103 4 1150 45 [326.24](https://2023.antflix.net#326.24)", + "displayTitle": "326.24 Bending Radius", + "children": [], + "url": "https://2023.antflix.net#326.24" + }, + { + "body": "A run of Type IGS cable between pull boxes or terminations shall not contain more than the equivalent of four quarter bends (360 degrees total), including those bends located immediately at the pull box or terminations. [326.26](https://2023.antflix.net#326.26)", + "displayTitle": "326.26 Bends", + "children": [], + "url": "https://2023.antflix.net#326.26" + }, + { + "body": "Terminations and splices for Type IGS cable shall be identified as a type that is suitable for maintaining the gas pressure within the conduit. A valve and cap shall be provided for each length of the cable and conduit to check the gas pressure or to inject gas into the conduit. [326.40](https://2023.antflix.net#326.40)", + "displayTitle": "326.40 Fittings", + "children": [], + "url": "https://2023.antflix.net#326.40" + }, + { + "body": "The ampacity of Type IGS cable shall not exceed the values shown in Table 326.80. Table 326.80 Ampacity of Type IGS Cable Size (kcmil) Amperes Size (kcmil) Amperes 250 119 2500 376 500 168 3000 412 750 206 3250 429 1000 238 3500 445 1250 266 3750 461 1500 292 4000 476 1750 315 4250 491 2000 336 4500 505 2250 357 4750 519 [326.80](https://2023.antflix.net#326.80)", + "displayTitle": "326.80 Ampacity", + "children": [], + "url": "https://2023.antflix.net#326.80" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_14_III" + }, + { + "body": "The conductors shall be solid aluminum rods, laid parallel, consisting of one to nineteen 12.7 mm (1/2 in.) diameter rods. The minimum conductor size shall be 250 kcmil, and the maximum size shall be 4750 kcmil. [326.104](https://2023.antflix.net#326.104)", + "displayTitle": "326.104 Conductors", + "children": [], + "url": "https://2023.antflix.net#326.104" + }, + { + "body": "The insulation shall be dry kraft paper tapes and a pressurized sulfur hexafluoride gas (SF6), both approved for electrical use. The nominal gas pressure shall be 138 kPa gauge (20 lb/in.2 gauge). The thickness of the paper spacer shall be as specified in Table 326.112. Table 326.112 Paper Spacer Thickness Size (kcmil) Thickness mm in. 250\u20141000 1.02 0.040 1250\u20144750 1.52 0.060 [326.112](https://2023.antflix.net#326.112)", + "displayTitle": "326.112 Insulation", + "children": [], + "url": "https://2023.antflix.net#326.112" + }, + { + "body": "The conduit shall be a medium density polyethylene identified as suitable for use with natural gas rated pipe in metric designator 53, 78, or 103 (trade size 2, 3, or 4). The percent fill dimensions for the conduit are shown in Table 326.116. The size of the conduit permitted for each conductor size shall be calculated for a percent fill not to exceed those found in Table 1, Chapter 9. Table 326.116 Conduit Dimensions Conduit Size Actual Outside Diameter Actual Inside Diameter Metric Designator Trade Size mm in. mm in. 53 2 60 2.375 49.46 1.947 78 3 89 3.500 73.30 2.886 103 4 114 4.500 94.23 3.710 [326.116](https://2023.antflix.net#326.116)", + "displayTitle": "326.116 Conduit", + "children": [], + "url": "https://2023.antflix.net#326.116" + }, + { + "body": "The cable shall be marked in accordance with 310.8(A), (B)(1), and (D). [326.120](https://2023.antflix.net#326.120)", + "displayTitle": "326.120 Marking", + "children": [], + "url": "https://2023.antflix.net#326.120" + } + ], + "url": "https://2023.antflix.net#326" + }, + { + "displayTitle": "Article 330 Metal-Clad Cable: Type MC", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_17_I" + }, + { + "body": "This article covers the use, installation, and construction specifications of metal-clad cable, Type MC. [330.1](https://2023.antflix.net#330.1)", + "displayTitle": "330.1 Scope", + "children": [], + "url": "https://2023.antflix.net#330.1" + }, + { + "body": "Type MC cable shall be listed. Fittings used for connecting Type MC cable to boxes, cabinets, or other equipment shall be listed and identified for such use. [330.6](https://2023.antflix.net#330.6)", + "displayTitle": "330.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#330.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_17_II" + }, + { + "displayTitle": "330.10 Uses Permitted", + "children": [ + { + "body": "Type MC cable shall be permitted as follows: For services, feeders, and branch circuits.For power, lighting, control, and signal circuits.Indoors or outdoors.Exposed or concealed.To be direct buried where identified for such use.In cable tray where identified for such use.In any raceway.As aerial cable on a messenger.In hazardous (classified) locations where specifically permitted by other articles in this Code.In dry locations and embedded in plaster finish on brick or other masonry except in damp or wet locations.In damp or wet locations where a corrosion-resistant jacket is provided over the metallic covering and any of the following conditions are met:The metallic covering is impervious to moisture.A jacket resistant to moisture is provided under the metal covering.The insulated conductors under the metallic covering are listed for use in wet locations.Where single-conductor cables are used, all phase conductors and, where used, the grounded conductor shall be grouped together to minimize induced voltage on the sheath. [330.10_(A)](https://2023.antflix.net#330.10_(A))", + "displayTitle": "(A) General Uses", + "children": [], + "url": "https://2023.antflix.net#330.10_(A)" + }, + { + "body": "Type MC cable shall be permitted to be installed in compliance with Parts II and III of Article 725 and 770.133 as applicable and in accordance with 330.10(B)(1) through (B)(4). Informational Note: The \"Uses Permitted\" is not an all-inclusive list. [330.10_(B)](https://2023.antflix.net#330.10_(B))", + "displayTitle": "(B) Specific Uses", + "children": [ + { + "body": "Type MC cable installed in cable tray shall comply with 392.10, 392.12, 392.18, 392.20, 392.22, 392.30, 392.46, 392.56, 392.60(C), and 392.80. [330.10_(B)_(1)](https://2023.antflix.net#330.10_(B)_(1))", + "displayTitle": "(1) Cable Tray", + "children": [], + "url": "https://2023.antflix.net#330.10_(B)_(1)" + }, + { + "body": "Direct-buried cable shall comply with 300.5 or 305.15, as appropriate. [330.10_(B)_(2)](https://2023.antflix.net#330.10_(B)_(2))", + "displayTitle": "(2) Direct Buried", + "children": [], + "url": "https://2023.antflix.net#330.10_(B)_(2)" + }, + { + "body": "Type MC cable installed as service-entrance cable shall be permitted in accordance with 230.43. [330.10_(B)_(3)](https://2023.antflix.net#330.10_(B)_(3))", + "displayTitle": "(3) Installed as Service-Entrance Cable", + "children": [], + "url": "https://2023.antflix.net#330.10_(B)_(3)" + }, + { + "body": "Type MC cable installed outside of buildings or structures or as aerial cable shall comply with 225.10, 396.10, and 396.12. [330.10_(B)_(4)](https://2023.antflix.net#330.10_(B)_(4))", + "displayTitle": "(4) Installed Outside of Buildings or Structures or as Aerial Cable", + "children": [], + "url": "https://2023.antflix.net#330.10_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#330.10_(B)" + } + ], + "url": "https://2023.antflix.net#330.10" + }, + { + "body": "Type MC cable shall not be used under either of the following conditions: Where subject to physical damageWhere exposed to any of the destructive corrosive conditions in (a) or (b), unless the metallic sheath or armor is resistant to the conditions or is protected by material resistant to the conditions:Direct buried in the earth or embedded in concrete unless identified for direct burialExposed to cinder fills, strong chlorides, caustic alkalis, or vapors of chlorine or of hydrochloric acids [330.12](https://2023.antflix.net#330.12)", + "displayTitle": "330.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#330.12" + }, + { + "body": "Exposed runs of cable, except as provided in 300.11(B), shall closely follow the surface of the building finish or of running boards. Exposed runs shall also be permitted to be installed on the underside of joists where supported at each joist and located so as not to be subject to physical damage. [330.15](https://2023.antflix.net#330.15)", + "displayTitle": "330.15 Exposed Work", + "children": [], + "url": "https://2023.antflix.net#330.15" + }, + { + "body": "Type MC cable shall be protected in accordance with 300.4(A), (C), and (D) where installed through or parallel to framing members. [330.17](https://2023.antflix.net#330.17)", + "displayTitle": "330.17 Through or Parallel to Framing Members", + "children": [], + "url": "https://2023.antflix.net#330.17" + }, + { + "body": "The installation of Type MC cable in accessible attics or roof spaces shall also comply with 320.23. [330.23](https://2023.antflix.net#330.23)", + "displayTitle": "330.23 In Accessible Attics", + "children": [], + "url": "https://2023.antflix.net#330.23" + }, + { + "body": "Bends in Type MC cable shall be so made that the cable will not be damaged. The radius of the curve of the inner edge of any bend shall not be less than required in 330.24(A) through (C). [330.24](https://2023.antflix.net#330.24)", + "displayTitle": "330.24 Bending Radius", + "children": [ + { + "body": "Ten times the external diameter of the metallic sheath for cable not more than 19 mm (3/4 in.) in external diameterTwelve times the external diameter of the metallic sheath for cable more than 19 mm (3/4 in.) but not more than 38 mm (11/2 in.) in external diameterFifteen times the external diameter of the metallic sheath for cable more than 38 mm (11/2 in.) in external diameter [330.24_(A)](https://2023.antflix.net#330.24_(A))", + "displayTitle": "(A) Smooth Sheath", + "children": [], + "url": "https://2023.antflix.net#330.24_(A)" + }, + { + "body": "Seven times the external diameter of the metallic sheath. [330.24_(B)](https://2023.antflix.net#330.24_(B))", + "displayTitle": "(B) Interlocked-Type Armor or Corrugated Sheath", + "children": [], + "url": "https://2023.antflix.net#330.24_(B)" + }, + { + "body": "Twelve times the overall diameter of one of the individual conductors or seven times the overall diameter of the multiconductor cable, whichever is greater. [330.24_(C)](https://2023.antflix.net#330.24_(C))", + "displayTitle": "(C) Shielded Conductors", + "children": [], + "url": "https://2023.antflix.net#330.24_(C)" + } + ], + "url": "https://2023.antflix.net#330.24" + }, + { + "displayTitle": "330.30 Securing and Supporting", + "children": [ + { + "body": "Type MC cable shall be supported and secured by staples; cable ties listed and identified for securement and support; straps, hangers, or similar fittings; or other approved means designed and installed so as not to damage the cable. Type MC cable fittings shall be permitted as a means of cable support. [330.30_(A)](https://2023.antflix.net#330.30_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#330.30_(A)" + }, + { + "body": "Unless otherwise permitted in this Code, cables shall be secured at intervals not exceeding 1.8 m (6 ft). Cables containing four or fewer conductors sized no larger than 10 AWG shall be secured within 300 mm (12 in.) of every box, cabinet, fitting, or other cable termination. In vertical installations, listed cables with ungrounded conductors 250 kcmil and larger shall be permitted to be secured at intervals not exceeding 3 m (10 ft). [330.30_(B)](https://2023.antflix.net#330.30_(B))", + "displayTitle": "(B) Securing", + "children": [], + "url": "https://2023.antflix.net#330.30_(B)" + }, + { + "body": "Unless otherwise permitted in this Code, cables shall be supported at intervals not exceeding 1.8 m (6 ft). Horizontal runs of Type MC cable installed in wooden or metal framing members or similar supporting means shall be considered supported and secured where such support does not exceed 1.8 m (6 ft) intervals. [330.30_(C)](https://2023.antflix.net#330.30_(C))", + "displayTitle": "(C) Supporting", + "children": [], + "url": "https://2023.antflix.net#330.30_(C)" + }, + { + "body": "Type MC cable shall be permitted to be unsupported and unsecured where the cable complies with any of the following: Is fished between access points through concealed spaces in finished buildings or structures and supporting is impracticalIs not more than 1.8 m (6 ft) in length from the last point of cable support to the point of connection to luminaires or other electrical equipment and the cable and point of connection are within an accessible ceilingIs Type MC of the interlocked armor type in lengths not exceeding 900 mm (3 ft) from the last point where it is securely fastened and is used to connect equipment where flexibility is necessary to minimize the transmission of vibration from equipment or to provide flexibility for equipment that requires movement after installation [330.30_(D)](https://2023.antflix.net#330.30_(D))", + "displayTitle": "(D) Unsupported Cables", + "children": [], + "url": "https://2023.antflix.net#330.30_(D)" + } + ], + "url": "https://2023.antflix.net#330.30" + }, + { + "body": "Where single-conductor cables with a nonferrous armor or sheath are used, the installation shall comply with 300.20. [330.31](https://2023.antflix.net#330.31)", + "displayTitle": "330.31 Single Conductors", + "children": [], + "url": "https://2023.antflix.net#330.31" + }, + { + "body": "The ampacity of Type MC cable shall be determined in accordance with 310.14 or 315.60 for 14 AWG and larger conductors and in accordance with Table 402.5 for 18 AWG and 16 AWG conductors. The installation shall not exceed the temperature ratings of terminations and equipment. [330.80](https://2023.antflix.net#330.80)", + "displayTitle": "330.80 Ampacity", + "children": [ + { + "body": "The ampacities for Type MC cable installed in cable tray shall be determined in accordance with 392.80. [330.80_(A)](https://2023.antflix.net#330.80_(A))", + "displayTitle": "(A) Type MC Cable Installed in Cable Tray", + "children": [], + "url": "https://2023.antflix.net#330.80_(A)" + }, + { + "body": "Where single Type MC conductors are grouped together in a triangular or square configuration and installed on a messenger or exposed with a maintained free airspace of not less than 2.15 times one conductor diameter (2.15 \u00d7 O.D.) of the largest conductor contained within the configuration and adjacent conductor configurations or cables, the ampacity of the conductors shall not exceed the allowable ampacities in the following tables: Table 310.20 for conductors rated 0 volts through 2000 voltsTable 315.60(C)(1) and Table 315.60(C)(2) for conductors rated over 2000 volts [330.80_(B)](https://2023.antflix.net#330.80_(B))", + "displayTitle": "(B) Single Type MC Conductors Grouped Together", + "children": [], + "url": "https://2023.antflix.net#330.80_(B)" + }, + { + "body": "Where more than two Type MC cables containing two or more current-carrying conductors in each cable are installed in contact with thermal insulation, caulk, or sealing foam without maintaining spacing between cables, the ampacity of each conductor shall be adjusted in accordance with Table 310.15(C)(1). [330.80_(C)](https://2023.antflix.net#330.80_(C))", + "displayTitle": "(C) Thermal Insulation", + "children": [], + "url": "https://2023.antflix.net#330.80_(C)" + } + ], + "url": "https://2023.antflix.net#330.80" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_15_III" + }, + { + "body": "For ungrounded, grounded, and equipment grounding conductors, the minimum conductor sizes shall be 14 AWG copper, nickel, or nickel-coated copper and 12 AWG aluminum or copper-clad aluminum. For control and signal conductors, minimum conductor sizes shall be 18 AWG copper, nickel, or nickel-coated copper, 14 AWG copper-clad aluminum, and 12 AWG aluminum. [330.104](https://2023.antflix.net#330.104)", + "displayTitle": "330.104 Conductors", + "children": [], + "url": "https://2023.antflix.net#330.104" + }, + { + "body": "Where Type MC cable is used to provide an equipment grounding conductor, it shall comply with 250.118(A)(10) and 250.122. [330.108](https://2023.antflix.net#330.108)", + "displayTitle": "330.108 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#330.108" + }, + { + "body": "Insulated conductors shall comply with 330.112(A) or (B). [330.112](https://2023.antflix.net#330.112)", + "displayTitle": "330.112 Insulation", + "children": [ + { + "body": "Insulated control and signal conductors in sizes 18 AWG and 16 AWG shall be of a type listed in Table 402.3, with a maximum operating temperature not less than 90\u00b0C (194\u00b0F) and as permitted by 724.49. Ungrounded, grounded, and equipment grounding conductors 16 AWG and larger shall be of a type listed in Table 310.4(1) or of a type identified for use in Type MC cable. [330.112_(A)](https://2023.antflix.net#330.112_(A))", + "displayTitle": "(A) 1000 Volts or Less", + "children": [], + "url": "https://2023.antflix.net#330.112_(A)" + }, + { + "body": "Insulated conductors shall be of a type listed in Table 310.4(2) and Table 315.10(A). [330.112_(B)](https://2023.antflix.net#330.112_(B))", + "displayTitle": "(B) Over 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#330.112_(B)" + } + ], + "url": "https://2023.antflix.net#330.112" + }, + { + "body": "Metallic covering shall be one of the following types: smooth metallic sheath, corrugated metallic sheath, or interlocking metal tape armor. The metallic sheath shall be continuous and close fitting. A nonmagnetic sheath or armor shall be used on single conductor Type MC. Supplemental protection of an outer covering of corrosion-resistant material shall be permitted and shall be required where such protection is needed. The sheath shall not be used as a current-carrying conductor. Informational Note: See 300.6 for protection against corrosion. [330.116](https://2023.antflix.net#330.116)", + "displayTitle": "330.116 Sheath", + "children": [], + "url": "https://2023.antflix.net#330.116" + }, + { + "body": "Where required to be marked MC-HL, the cable shall be listed and shall have a gas/vapor tight continuous corrugated metallic sheath, an overall jacket of suitable polymeric material, and a separate equipment grounding conductor. [330.130](https://2023.antflix.net#330.130)", + "displayTitle": "330.130 Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#330.130" + } + ], + "url": "https://2023.antflix.net#330" + }, + { + "displayTitle": "Article 332 Mineral-Insulated, Metal-Sheathed Cable: Type MI", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_18_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for mineral-insulated, metal-sheathed cable, Type MI. [332.1](https://2023.antflix.net#332.1)", + "displayTitle": "332.1 Scope", + "children": [], + "url": "https://2023.antflix.net#332.1" + }, + { + "body": "Type MI cable and associated fittings shall be listed. [332.6](https://2023.antflix.net#332.6)", + "displayTitle": "332.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#332.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_18_II" + }, + { + "body": "Type MI cable shall be permitted as follows: For services, feeders, and branch circuitsFor power, lighting, control, and signal circuitsIn dry, wet, or continuously moist locationsIndoors or outdoorsWhere exposed or concealedWhere embedded in plaster, concrete, fill, or other masonry, whether above or below gradeIn hazardous (classified) locations where specifically permitted by other articles in this CodeWhere exposed to oil and gasolineWhere exposed to corrosive conditions not deteriorating to its sheathIn underground runs where suitably protected against physical damage and corrosive conditionsIn or attached to cable trayInformational Note: The \"Uses Permitted\" is not an all-inclusive list. [332.10](https://2023.antflix.net#332.10)", + "displayTitle": "332.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#332.10" + }, + { + "body": "Type MI cable shall not be used under the following conditions or in the following locations: In underground runs unless protected from physical damage, where necessaryWhere exposed to conditions that are destructive and corrosive to the metallic sheath, unless additional protection is provided [332.12](https://2023.antflix.net#332.12)", + "displayTitle": "332.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#332.12" + }, + { + "body": "Type MI cable shall be protected in accordance with 300.4 where installed through or parallel to framing members. [332.17](https://2023.antflix.net#332.17)", + "displayTitle": "332.17 Through or Parallel to Framing Members", + "children": [], + "url": "https://2023.antflix.net#332.17" + }, + { + "body": "Bends in Type MI cable shall be so made that the cable will not be damaged. The radius of the inner edge of any bend shall not be less than required as follows: Five times the external diameter of the metallic sheath for cable not more than 19 mm (3/4 in.) in external diameterTen times the external diameter of the metallic sheath for cable greater than 19 mm (3/4 in.) but not more than 25 mm (1 in.) in external diameter [332.24](https://2023.antflix.net#332.24)", + "displayTitle": "332.24 Bending Radius", + "children": [], + "url": "https://2023.antflix.net#332.24" + }, + { + "body": "Type MI cable shall be supported and secured by staples, straps, hangers, or similar fittings, designed and installed so as not to damage the cable, at intervals not exceeding 1.8 m (6 ft). [332.30](https://2023.antflix.net#332.30)", + "displayTitle": "332.30 Securing and Supporting", + "children": [ + { + "body": "In other than vertical runs, cables installed in accordance with 300.4 shall be considered supported and secured where such support does not exceed 1.8 m (6 ft) intervals. [332.30_(A)](https://2023.antflix.net#332.30_(A))", + "displayTitle": "(A) Horizontal Runs Through Holes and Notches", + "children": [], + "url": "https://2023.antflix.net#332.30_(A)" + }, + { + "body": "Type MI cable shall be permitted to be unsupported where the cable is fished between access points through concealed spaces in finished buildings or structures and supporting is impracticable. [332.30_(B)](https://2023.antflix.net#332.30_(B))", + "displayTitle": "(B) Unsupported Cable", + "children": [], + "url": "https://2023.antflix.net#332.30_(B)" + }, + { + "body": "All MI cable installed in cable trays shall comply with 392.30(A). [332.30_(C)](https://2023.antflix.net#332.30_(C))", + "displayTitle": "(C) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#332.30_(C)" + } + ], + "url": "https://2023.antflix.net#332.30" + }, + { + "body": "Where single-conductor cables are used, all phase conductors and, where used, the neutral conductor shall be grouped together to minimize induced voltage on the sheath. [332.31](https://2023.antflix.net#332.31)", + "displayTitle": "332.31 Single Conductors", + "children": [], + "url": "https://2023.antflix.net#332.31" + }, + { + "displayTitle": "332.40 Boxes and Fittings", + "children": [ + { + "body": "Fittings used for connecting Type MI cable to boxes, cabinets, or other equipment shall be identified for such use. [332.40_(A)](https://2023.antflix.net#332.40_(A))", + "displayTitle": "(A) Fittings", + "children": [], + "url": "https://2023.antflix.net#332.40_(A)" + }, + { + "body": "Where Type MI cable terminates, an end seal fitting shall be installed immediately after stripping to prevent the entrance of moisture into the insulation. The conductors extending beyond the sheath shall be individually provided with an insulating material. [332.40_(B)](https://2023.antflix.net#332.40_(B))", + "displayTitle": "(B) Terminal Seals", + "children": [], + "url": "https://2023.antflix.net#332.40_(B)" + } + ], + "url": "https://2023.antflix.net#332.40" + }, + { + "body": "The ampacity of Type MI cable shall be determined in accordance with 310.14. The conductor temperature at the end seal fitting shall not exceed the temperature rating of the listed end seal fitting, and the installation shall not exceed the temperature ratings of terminations or equipment. [332.80](https://2023.antflix.net#332.80)", + "displayTitle": "332.80 Ampacity", + "children": [ + { + "body": "The ampacities for Type MI cable installed in cable tray shall be determined in accordance with 392.80(A). [332.80_(A)](https://2023.antflix.net#332.80_(A))", + "displayTitle": "(A) Type MI Cable Installed in Cable Tray", + "children": [], + "url": "https://2023.antflix.net#332.80_(A)" + }, + { + "body": "Where single Type MI conductors are grouped together in a triangular or square configuration, as required by 332.31, and installed on a messenger or exposed with a maintained free air space of not less than 2.15 times one conductor diameter (2.15 \u00d7 O.D.) of the largest conductor contained within the configuration and adjacent conductor configurations or cables, the ampacity of the conductors shall not exceed the allowable ampacities of Table 310.17. [332.80_(B)](https://2023.antflix.net#332.80_(B))", + "displayTitle": "(B) Single Type MI Conductors Grouped Together", + "children": [], + "url": "https://2023.antflix.net#332.80_(B)" + } + ], + "url": "https://2023.antflix.net#332.80" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_16_III" + }, + { + "body": "Type Ml cable conductors shall be of solid copper, nickel, or nickel-coated copper with a resistance corresponding to standard AWG and kcmil sizes. [332.104](https://2023.antflix.net#332.104)", + "displayTitle": "332.104 Conductors", + "children": [], + "url": "https://2023.antflix.net#332.104" + }, + { + "body": "Where the outer sheath is made of copper, it shall provide an adequate path to serve as an equipment grounding conductor. Where the outer sheath is made of steel, a separate equipment grounding conductor shall be provided. [332.108](https://2023.antflix.net#332.108)", + "displayTitle": "332.108 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#332.108" + }, + { + "body": "The conductor insulation in Type MI cable shall be a highly compressed refractory mineral that provides proper spacing for all conductors. [332.112](https://2023.antflix.net#332.112)", + "displayTitle": "332.112 Insulation", + "children": [], + "url": "https://2023.antflix.net#332.112" + }, + { + "body": "The outer sheath shall be of a continuous construction to provide mechanical protection and moisture seal. [332.116](https://2023.antflix.net#332.116)", + "displayTitle": "332.116 Sheath", + "children": [], + "url": "https://2023.antflix.net#332.116" + } + ], + "url": "https://2023.antflix.net#332" + }, + { + "displayTitle": "Article 334 Nonmetallic-Sheathed Cable: Types NM and NMC", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_19_I" + }, + { + "body": "This article covers the use, installation, and construction specifications of nonmetallic-sheathed cable. [334.1](https://2023.antflix.net#334.1)", + "displayTitle": "334.1 Scope", + "children": [], + "url": "https://2023.antflix.net#334.1" + }, + { + "body": "Type NM and Type NMC cables and associated fittings shall be listed. [334.6](https://2023.antflix.net#334.6)", + "displayTitle": "334.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#334.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_19_II" + }, + { + "body": "Type NM and Type NMC cables shall be permitted to be used in the following, except as prohibited in 334.12: One- and two-family dwellings and their attached or detached garages, and their storage buildings.Multi-family dwellings and their detached garages permitted to be of Types III, IV, and V construction.Other structures permitted to be of Types III, IV, and V construction. Cables shall be concealed within walls, floors, or ceilings that provide a thermal barrier of material that has at least a 15-minute finish rating as identified in listings of fire-rated assemblies.Informational Note No. 1: See NFPA 220-2021, Standard on Types of Building Construction, or the applicable building code, or both for types of building construction and occupancy classification definitions.Informational Note No. 2: See Informative Annex E for determination of building types.Cable trays in structures permitted to be Types III, IV, or V where the cables are identified for the use.Informational Note No. 3: See 310.14(A)(3) for temperature limitation of conductors.Types I and II construction where installed within raceways permitted to be installed in Types I and II construction. [334.10](https://2023.antflix.net#334.10)", + "displayTitle": "334.10 Uses Permitted", + "children": [ + { + "body": "Type NM cable shall be permitted as follows: For both exposed and concealed work in normally dry locations except as prohibited in 334.10(3)To be installed or fished in air voids in masonry block or tile walls [334.10_(A)](https://2023.antflix.net#334.10_(A))", + "displayTitle": "(A) Type NM", + "children": [], + "url": "https://2023.antflix.net#334.10_(A)" + }, + { + "body": "Type NMC cable shall be permitted as follows: For both exposed and concealed work in dry, wet, damp, or corrosive locations, except as prohibited by 334.10(3)In outside and inside walls of masonry block or tileIn a shallow chase in masonry, concrete, or adobe protected against nails or screws by a steel plate at least 1.59 mm (1/16 in.) thick and covered with plaster, adobe, or similar finish [334.10_(B)](https://2023.antflix.net#334.10_(B))", + "displayTitle": "(B) Type NMC", + "children": [], + "url": "https://2023.antflix.net#334.10_(B)" + } + ], + "url": "https://2023.antflix.net#334.10" + }, + { + "displayTitle": "334.12 Uses Not Permitted", + "children": [ + { + "body": "Types NM and NMC cables shall not be permitted as follows: In any dwelling or structure not specifically permitted in 334.10(1), (2), (3), and (5)Exposed within a dropped or suspended ceiling cavity in other than one- and two-family and multifamily dwellingsAs service-entrance cableIn commercial garages having hazardous (classified) locations as defined in 511.3In theaters and similar locations, except where permitted in 518.4(C)In motion picture studiosIn storage battery roomsIn hoistways or on elevators or escalatorsEmbedded in poured cement, concrete, or aggregateIn hazardous (classified) locations, except where specifically permitted by other articles in this Code [334.12_(A)](https://2023.antflix.net#334.12_(A))", + "displayTitle": "(A) Types NM and NMC", + "children": [], + "url": "https://2023.antflix.net#334.12_(A)" + }, + { + "body": "Type NM cables shall not be used under the following conditions or in the following locations: Where exposed to corrosive fumes or vaporsWhere embedded in masonry, concrete, adobe, fill, or plasterIn a shallow chase in masonry, concrete, or adobe and covered with plaster, adobe, or similar finishIn wet or damp locations [334.12_(B)](https://2023.antflix.net#334.12_(B))", + "displayTitle": "(B) Type NM", + "children": [], + "url": "https://2023.antflix.net#334.12_(B)" + } + ], + "url": "https://2023.antflix.net#334.12" + }, + { + "body": "In exposed work, except as provided in 300.11(B), cable shall be installed as specified in 334.15(A) through (C). [334.15](https://2023.antflix.net#334.15)", + "displayTitle": "334.15 Exposed Work", + "children": [ + { + "body": "Cable shall closely follow the surface of the building finish or of running boards. [334.15_(A)](https://2023.antflix.net#334.15_(A))", + "displayTitle": "(A) To Follow Surface", + "children": [], + "url": "https://2023.antflix.net#334.15_(A)" + }, + { + "body": "Cable shall be protected from physical damage where necessary by rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, RTRC marked with the suffix -XW, or other approved means. Where passing through a floor, the cable shall be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, RTRC marked with the suffix -XW, or other approved means extending at least 150 mm (6 in.) above the floor. Conduit or tubing shall be provided with a bushing or adapter that provides protection from abrasion at the point the cable enters and exits the raceway. Type NMC cable installed in shallow chases or grooves in masonry, concrete, or adobe shall be protected in accordance with the requirements in 300.4(F) and covered with plaster, adobe, or similar finish. [334.15_(B)](https://2023.antflix.net#334.15_(B))", + "displayTitle": "(B) Protection From Physical Damage", + "children": [], + "url": "https://2023.antflix.net#334.15_(B)" + }, + { + "body": "Where cable is run at angles with joists in unfinished basements and crawl spaces, it shall be permissible to secure cables not smaller than two 6 AWG or three 8 AWG conductors directly to the lower edges of the joists. Smaller cables shall be run either through bored holes in joists or on running boards. Nonmetallic-sheathed cable installed on the wall of an unfinished basement shall be permitted to be installed in a listed conduit or tubing or shall be protected in accordance with 300.4. Conduit or tubing shall be provided with a bushing or adapter that provides protection from abrasion at the point the cable enters and exits the raceway. The sheath of the nonmetallic-sheathed cable shall extend through the conduit or tubing and into the outlet, device, or junction box not less than 6 mm (1/4 in.). The cable shall be secured within 300 mm (12 in.) of the point where the cable enters the conduit or tubing. Metal conduit, tubing, and metal outlet boxes shall be connected to an equipment grounding conductor complying with 250.86 and 250.148. [334.15_(C)](https://2023.antflix.net#334.15_(C))", + "displayTitle": "(C) In Unfinished Basements and Crawl Spaces", + "children": [], + "url": "https://2023.antflix.net#334.15_(C)" + } + ], + "url": "https://2023.antflix.net#334.15" + }, + { + "body": "Types NM and NMC cable shall be protected in accordance with 300.4 where installed through or parallel to framing members. Grommets used as required in 300.4(B)(1) shall remain in place and be listed for the purpose of cable protection. [334.17](https://2023.antflix.net#334.17)", + "displayTitle": "334.17 Through or Parallel to Framing Members", + "children": [], + "url": "https://2023.antflix.net#334.17" + }, + { + "body": "The sheath on nonmetallic-sheathed cable shall extend not less than 6 mm (1/4 in.) beyond any cable clamp or cable entry. [334.19](https://2023.antflix.net#334.19)", + "displayTitle": "334.19 Cable Entries", + "children": [], + "url": "https://2023.antflix.net#334.19" + }, + { + "body": "The installation of cable in accessible attics or roof spaces shall also comply with 320.23. [334.23](https://2023.antflix.net#334.23)", + "displayTitle": "334.23 In Accessible Attics", + "children": [], + "url": "https://2023.antflix.net#334.23" + }, + { + "body": "Bends in Types NM and NMC cable shall be so made that the cable will not be damaged. The radius of the curve of the inner edge of any bend during or after installation shall not be less than five times the diameter of the cable. For flat cables, the major diameter dimension of the cable shall be used to determine the bending radius. [334.24](https://2023.antflix.net#334.24)", + "displayTitle": "334.24 Bending Radius", + "children": [], + "url": "https://2023.antflix.net#334.24" + }, + { + "body": "Nonmetallic-sheathed cable shall be supported and secured by staples, cable ties listed and identified for securement and support, or straps, hangers, or similar fittings designed and installed so as not to damage the cable, at intervals not exceeding 1.4 m (41/2 ft) and within 300 mm (12 in.) of every cable entry into enclosures such as outlet boxes, junction boxes, cabinets, or fittings. The cable length between the cable entry and the closest cable support shall not exceed 450 mm (18 in.). Flat cables shall not be stapled on edge. Sections of cable protected from physical damage by raceway shall not be required to be secured within the raceway. [334.30](https://2023.antflix.net#334.30)", + "displayTitle": "334.30 Securing and Supporting", + "children": [ + { + "body": "In other than vertical runs, cables installed in accordance with 300.4 shall be considered to be supported and secured where such support does not exceed 1.4-m (41/2-ft) intervals and the nonmetallic-sheathed cable is securely fastened in place by an approved means within 300 mm (12 in.) of each box, cabinet, conduit body, or other nonmetallic-sheathed cable termination. Informational Note: See 314.17(B)(1) for support where nonmetallic boxes are used. [334.30_(A)](https://2023.antflix.net#334.30_(A))", + "displayTitle": "(A) Horizontal Runs Through Holes and Notches", + "children": [], + "url": "https://2023.antflix.net#334.30_(A)" + }, + { + "body": "Nonmetallic-sheathed cable shall be permitted to be unsupported where the cable: Is fished between access points through concealed spaces in finished buildings or structures and supporting is impracticable.Is not more than 1.4 m (41/2 ft) from the last point of cable support to the point of connection to a luminaire or other piece of electrical equipment and the cable and point of connection are within an accessible ceiling in one-, two-, or multifamily dwellings. [334.30_(B)](https://2023.antflix.net#334.30_(B))", + "displayTitle": "(B) Unsupported Cables", + "children": [], + "url": "https://2023.antflix.net#334.30_(B)" + }, + { + "body": "A wiring device identified for the use, without a separate outlet box, and incorporating an integral cable clamp shall be permitted where the cable is secured in place at intervals not exceeding 1.4 m (41/2 ft) and within 300 mm (12 in.) from the wiring device wall opening, and there shall be at least a 300 mm (12 in.) loop of unbroken cable or 150 mm (6 in.) of a cable end available on the interior side of the finished wall to permit replacement. [334.30_(C)](https://2023.antflix.net#334.30_(C))", + "displayTitle": "(C) Wiring Device Without a Separate Outlet Box", + "children": [], + "url": "https://2023.antflix.net#334.30_(C)" + } + ], + "url": "https://2023.antflix.net#334.30" + }, + { + "displayTitle": "334.40 Boxes and Fittings", + "children": [ + { + "body": "Nonmetallic outlet boxes shall be permitted as provided by 314.3. [334.40_(A)](https://2023.antflix.net#334.40_(A))", + "displayTitle": "(A) Boxes of Insulating Material", + "children": [], + "url": "https://2023.antflix.net#334.40_(A)" + }, + { + "body": "Self-contained switches, self-contained receptacles, and listed nonmetallic-sheathed cable interconnector devices of insulating material that are listed for use without a box shall be permitted to be used without boxes in exposed or concealed installations. Openings in such devices shall form a close fit around the outer covering of the cable, and the device shall fully enclose the part of the cable from which any part of the covering has been removed. Where connections to conductors are by binding-screw terminals, there shall be available as many terminals as conductors. [334.40_(B)](https://2023.antflix.net#334.40_(B))", + "displayTitle": "(B) Devices of Insulating Material", + "children": [], + "url": "https://2023.antflix.net#334.40_(B)" + }, + { + "body": "Wiring devices with integral enclosures identified for such use shall be permitted as provided by 300.15(E). [334.40_(C)](https://2023.antflix.net#334.40_(C))", + "displayTitle": "(C) Devices With Integral Enclosures", + "children": [], + "url": "https://2023.antflix.net#334.40_(C)" + } + ], + "url": "https://2023.antflix.net#334.40" + }, + { + "body": "The ampacity of Types NM and NMC cable shall be determined in accordance with 310.14. The ampacity shall not exceed that of a 60\u00b0C (140\u00b0F) rated conductor. The 90\u00b0C (194\u00b0F) rating shall be permitted to be used for ampacity adjustment and correction calculations, provided the final calculated ampacity does not exceed that of a 60\u00b0C (140\u00b0F) rated conductor. The ampacity of Types NM and NMC cable installed in cable trays shall be determined in accordance with 392.80(A). Where more than two NM cables containing two or more current-carrying conductors are installed, without maintaining spacing between the cables, through the same opening in wood framing that is to be sealed with thermal insulation, caulk, or sealing foam, the ampacity of each conductor shall be adjusted in accordance with Table 310.15(C)(1) and 310.14(A)(2), Exception, shall not apply. Where more than two NM cables containing two or more current-carrying conductors are installed in contact with thermal insulation without maintaining spacing between cables, the ampacity of each conductor shall be adjusted in accordance with Table 310.15(C)(1) and 310.14(A)(2), Exception shall not apply. [334.80](https://2023.antflix.net#334.80)", + "displayTitle": "334.80 Ampacity", + "children": [], + "url": "https://2023.antflix.net#334.80" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_17_III" + }, + { + "body": "The outer cable sheath of nonmetallic-sheathed cable shall be a nonmetallic material. [334.100](https://2023.antflix.net#334.100)", + "displayTitle": "334.100 Construction", + "children": [], + "url": "https://2023.antflix.net#334.100" + }, + { + "body": "The 600-volt insulated power conductors shall be sizes 14 AWG through 2 AWG copper conductors or sizes 12 AWG through 2 AWG aluminum or copper-clad aluminum conductors. Control and signaling conductors shall be no smaller than 18 AWG copper. [334.104](https://2023.antflix.net#334.104)", + "displayTitle": "334.104 Conductors", + "children": [], + "url": "https://2023.antflix.net#334.104" + }, + { + "body": "In addition to the insulated conductors, the cable shall have an insulated, covered, or bare equipment grounding conductor. [334.108](https://2023.antflix.net#334.108)", + "displayTitle": "334.108 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#334.108" + }, + { + "body": "The insulated power conductors shall be one of the types listed in Table 310.4(1) that are suitable for branch-circuit wiring or one that is identified for use in these cables. Conductor insulation shall be rated at 90\u00b0C (194\u00b0F). Informational Note: Types NM and NMC cable identified by the markings NM-B and NMC-B meet this requirement. [334.112](https://2023.antflix.net#334.112)", + "displayTitle": "334.112 Insulation", + "children": [], + "url": "https://2023.antflix.net#334.112" + }, + { + "body": "The outer sheath of nonmetallic-sheathed cable shall comply with 334.116(A) and (B). [334.116](https://2023.antflix.net#334.116)", + "displayTitle": "334.116 Sheath", + "children": [ + { + "body": "The overall covering shall be flame retardant and moisture resistant. [334.116_(A)](https://2023.antflix.net#334.116_(A))", + "displayTitle": "(A) Type NM", + "children": [], + "url": "https://2023.antflix.net#334.116_(A)" + }, + { + "body": "The overall covering shall be flame retardant, moisture resistant, fungus resistant, and corrosion resistant. [334.116_(B)](https://2023.antflix.net#334.116_(B))", + "displayTitle": "(B) Type NMC", + "children": [], + "url": "https://2023.antflix.net#334.116_(B)" + } + ], + "url": "https://2023.antflix.net#334.116" + } + ], + "url": "https://2023.antflix.net#334" + }, + { + "displayTitle": "Article 335 Instrumentation Tray Cable: Type ITC", + "children": [ + { + "body": "This article covers the use, installation, and construction specifications of instrumentation tray cable (Type ITC) for application to instrumentation and control circuits operating at 150 volts or less and 5 amperes or less. [335.1](https://2023.antflix.net#335.1)", + "displayTitle": "335.1 Scope", + "children": [], + "url": "https://2023.antflix.net#335.1" + }, + { + "body": "In addition to the provisions of this article, installation of Type ITC cable shall comply with other applicable articles of this Code. [335.3](https://2023.antflix.net#335.3)", + "displayTitle": "335.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#335.3" + }, + { + "body": "Type ITC cable shall be permitted to be used as follows in industrial establishments where the conditions of maintenance and supervision ensure that only qualified persons service the installation: In cable trays.In raceways.In hazardous locations as permitted in 501.10, 502.10, 503.10, 504.20, 504.30, 504.80, and 505.15.Enclosed in a smooth metallic sheath, continuous corrugated metallic sheath, or interlocking tape armor applied over the nonmetallic sheath in accordance with 335.6. The cable shall be supported and secured at intervals not exceeding 1.8 m (6 ft).Cable, without a metallic sheath or armor, that complies with the crush and impact requirements of Type MC cable and is identified for such use with the marking ITC-ER shall be permitted to be installed exposed. The cable shall be continuously supported and protected against physical damage using mechanical protection such as dedicated struts, angles, or channels. The cable shall be secured at intervals not exceeding 1.8 m (6 ft).Exception to (5): Where not subject to physical damage, Type ITC-ER shall be permitted to transition between cable trays and between cable trays and utilization equipment or devices for a distance not to exceed 1.8 m (6 ft) without continuous support. The cable shall be mechanically supported where exiting the cable tray to ensure that the minimum bending radius is not exceeded.As aerial cable on a messenger.Direct buried where identified for the use.Under raised floors in rooms containing industrial process control equipment and rack rooms where arranged to prevent damage to the cable.Under raised floors in information technology equipment rooms in accordance with 645.5(E)(2). [335.4](https://2023.antflix.net#335.4)", + "displayTitle": "335.4 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#335.4" + }, + { + "body": "Type ITC cable shall not be installed on circuits operating at more than 150 volts or more than 5 amperes. Installation of Type ITC cable with other cables shall be subject to the stated requirements of the specific articles for the other cables. Where the governing articles do not contain stated requirements for installation with Type ITC cable, the installation of Type ITC cable with the other cables shall not be permitted. Type ITC cable shall not be installed with power, lighting, Class 1 circuits that are not power limited, or non-power-limited circuits. Exception No. 1: Where terminated within equipment or junction boxes and separations are maintained by insulating barriers or other means. Exception No. 2: Where a metallic sheath or armor is applied over the nonmetallic sheath of the Type ITC cable. [335.5](https://2023.antflix.net#335.5)", + "displayTitle": "335.5 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#335.5" + }, + { + "body": "The insulated conductors of Type ITC cable shall be in sizes 22 AWG through 12 AWG. The conductor material shall be copper or thermocouple alloy. Insulation on the conductors shall be rated for 300 volts. Shielding shall be permitted. The cable shall be listed as being resistant to the spread of fire. The outer jacket shall be sunlight and moisture resistant. Where a smooth metallic sheath, continuous corrugated metallic sheath, or interlocking tape armor is applied over the nonmetallic sheath, an overall nonmetallic jacket shall not be required. Informational Note: One method of defining resistant to the spread of fire is that the cables do not spread fire to the top of the tray in the UL flame exposure, vertical tray flame test in ANSI/UL 1685-2010, Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables. The smoke measurements in the test method are not applicable. Another method of defining resistant to the spread of fire is for the damage (char length) not to exceed 1.5 m (4 ft 11 in.) when performing the CSA vertical flame test - cables in cable trays, as described in CSA C22.2 No. 0.3-M-2001, Test Methods for Electrical Wires and Cables. [335.6](https://2023.antflix.net#335.6)", + "displayTitle": "335.6 Construction", + "children": [], + "url": "https://2023.antflix.net#335.6" + }, + { + "body": "The cable shall be marked in accordance with 310.8(A)(2) through (A)(5). Voltage ratings shall not be marked on the cable. [335.7](https://2023.antflix.net#335.7)", + "displayTitle": "335.7 Marking", + "children": [], + "url": "https://2023.antflix.net#335.7" + }, + { + "body": "The ampacity of the conductors shall be 5 amperes, except for 22 AWG conductors, which shall have an ampacity of 3 amperes. [335.8](https://2023.antflix.net#335.8)", + "displayTitle": "335.8 Ampacity", + "children": [], + "url": "https://2023.antflix.net#335.8" + }, + { + "body": "Overcurrent protection shall not exceed 5 amperes for 20 AWG and larger conductors, and 3 amperes for 22 AWG conductors. [335.9](https://2023.antflix.net#335.9)", + "displayTitle": "335.9 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#335.9" + }, + { + "body": "Bends in Type ITC cables shall be made so as not to damage the cable. [335.10](https://2023.antflix.net#335.10)", + "displayTitle": "335.10 Bends", + "children": [], + "url": "https://2023.antflix.net#335.10" + } + ], + "url": "https://2023.antflix.net#335" + }, + { + "displayTitle": "Article 336 Power and Control Tray Cable: Type TC", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_20_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for power and control tray cable, Type TC. [336.1](https://2023.antflix.net#336.1)", + "displayTitle": "336.1 Scope", + "children": [], + "url": "https://2023.antflix.net#336.1" + }, + { + "body": "Type TC cables and associated fittings shall be listed. [336.6](https://2023.antflix.net#336.6)", + "displayTitle": "336.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#336.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_20_II" + }, + { + "body": "Type TC cable shall be permitted to be used as follows: For power, lighting, control, and signal circuits.In cable trays, including those with mechanically discontinuous segments up to 300 mm (1 ft).In raceways.In outdoor locations supported by a messenger wire.For Class 1 circuits as permitted in Parts II and III of Article 725.For non-power-limited fire alarm circuits if conductors comply with the requirements of 760.49.Between a cable tray and the utilization equipment or device(s), provided all of the following apply:The cable is Type TC-ER.The cable is installed in industrial establishments where the conditions of maintenance and supervision ensure that only qualified persons service the installation.The cable is continuously supported and protected against physical damage using mechanical protection such as struts, angles, or channels.The cable complies with the crush and impact requirements of Type MC cable and is identified with the marking \"TC-ER.\"The cable is secured at intervals not exceeding 1.8 m (6 ft).Equipment grounding for the utilization equipment is provided by an equipment grounding conductor within the cable. In cables containing conductors sized 6 AWG or smaller, the equipment grounding conductor shall be provided within the cable or, at the time of installation, one or more insulated conductors shall be permanently identified as an equipment grounding conductor in accordance with 250.119(C).Exception to (7): Where not subject to physical damage, Type TC-ER shall be permitted to transition between cable trays and between cable trays and equipment or devices for a distance not to exceed 1.8 m (6 ft) without continuous support. The cable shall be mechanically supported where exiting the cable tray to ensure that the minimum bending radius is not exceeded.Type TC cable shall be resistant to moisture and corrosive agents where installed in wet locations.For one- and two-family dwelling units, Type TC-ER-JP cable containing conductors for both power and control circuits shall be permitted for branch circuits and feeders. Type TC-ER-JP cable used as interior wiring shall be installed per the requirements of Part II of Article 334 and where installed as exterior wiring shall be installed per the requirements of Part II of Article 340.Exception: Where used to connect a generator and associated equipment having terminals rated 75\u00b0C (140\u00b0F) or higher, the cable shall not be limited in ampacity by 334.80 or 340.80.Informational Note No. 1: See 725.136 for limitations on Class 2 or 3 circuits contained within the same cable with conductors of electric light, power, or Class 1 circuits.Direct buried, where identified for such use.In hazardous (classified) locations where specifically permitted by other articles in this Code.For service-entrance conductors where identified for such use and marked Type TC-ER.Informational Note No. 2: See 310.14(A)(3) for temperature limitation of conductors. [336.10](https://2023.antflix.net#336.10)", + "displayTitle": "336.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#336.10" + }, + { + "body": "Type TC tray cable shall not be installed or used as follows: Installed where it will be exposed to physical damageInstalled outside a raceway or cable tray system, except as permitted in 336.10(4), 336.10(7), 336.10(9), and 336.10(10)Used where exposed to direct rays of the sun, unless identified as sunlight resistant [336.12](https://2023.antflix.net#336.12)", + "displayTitle": "336.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#336.12" + }, + { + "body": "Bends in Type TC cable shall be made so as not to damage the cable. For Type TC cable without metal shielding, the minimum bending radius shall be as follows: Four times the overall diameter for cables 25 mm (1 in.) or less in diameterFive times the overall diameter for cables larger than 25 mm (1 in.) but not more than 50 mm (2 in.) in diameterSix times the overall diameter for cables larger than 50 mm (2 in.) in diameterType TC cables with metallic shielding shall have a minimum bending radius of not less than 12 times the cable overall diameter. [336.24](https://2023.antflix.net#336.24)", + "displayTitle": "336.24 Bending Radius", + "children": [], + "url": "https://2023.antflix.net#336.24" + }, + { + "body": "The ampacity of Type TC tray cable shall be determined in accordance with 392.80(A) for 14 AWG and larger conductors, in accordance with 402.5 for 18 AWG through 16 AWG conductors where installed in cable trays, and in accordance with 310.14 where installed outside of cable trays, where permitted. [336.80](https://2023.antflix.net#336.80)", + "displayTitle": "336.80 Ampacity", + "children": [], + "url": "https://2023.antflix.net#336.80" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_18_III" + }, + { + "body": "A metallic sheath or armor as defined in 330.116 shall not be permitted either under or over the nonmetallic jacket. Metallic shield(s) shall be permitted over groups of conductors, under the outer jacket, or both. [336.100](https://2023.antflix.net#336.100)", + "displayTitle": "336.100 Construction", + "children": [], + "url": "https://2023.antflix.net#336.100" + }, + { + "body": "For ungrounded, grounded, and equipment grounding conductors, the conductor sizes shall be 14 AWG through 1000 kcmil copper, nickel, or nickel-coated copper and 12 AWG through 1000 kcmil aluminum or copper-clad aluminum. Insulation types shall be one of the types listed in Table 310.4(1) or Table 310.4(2) that is suitable for branch circuit and feeder circuits or one that is identified for such use. For control and signal conductors, the minimum conductor sizes shall be 18 AWG copper, nickel, or nickel-coated copper, 14 AWG copper-clad aluminum, and 12 AWG aluminum. [336.104](https://2023.antflix.net#336.104)", + "displayTitle": "336.104 Conductors", + "children": [ + { + "body": "Where used for fire alarm systems, conductors shall also be in accordance with 760.49. [336.104_(A)](https://2023.antflix.net#336.104_(A))", + "displayTitle": "(A) Fire Alarm Systems", + "children": [], + "url": "https://2023.antflix.net#336.104_(A)" + }, + { + "body": "Conductors in Type TC cable used for thermocouple circuits in accordance with Part III of Article 724 shall also be permitted to be any of the materials used for thermocouple extension wire. [336.104_(B)](https://2023.antflix.net#336.104_(B))", + "displayTitle": "(B) Thermocouple Circuits", + "children": [], + "url": "https://2023.antflix.net#336.104_(B)" + }, + { + "body": "Insulated conductors of 18 AWG and 16 AWG copper shall also be in accordance with 724.49. [336.104_(C)](https://2023.antflix.net#336.104_(C))", + "displayTitle": "(C) Class 1 Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#336.104_(C)" + } + ], + "url": "https://2023.antflix.net#336.104" + }, + { + "body": "The outer jacket shall be a flame-retardant, nonmetallic material. [336.116](https://2023.antflix.net#336.116)", + "displayTitle": "336.116 Jacket", + "children": [], + "url": "https://2023.antflix.net#336.116" + }, + { + "body": "There shall be no voltage marking on a Type TC cable employing thermocouple extension wire. [336.120](https://2023.antflix.net#336.120)", + "displayTitle": "336.120 Marking", + "children": [], + "url": "https://2023.antflix.net#336.120" + }, + { + "body": "Cable listed and marked Type TC-ER-HL shall comply with the following: The overall nonmetallic jacket shall be suitable for the environment.The overall cable construction shall be essentially circular in cross-section.The overall nonmetallic jacket shall be continuous and gas/vapor tight.For construction greater than 25.4 mm (1 in.) in diameter, the following shall apply:The equipment grounding conductor shall be bare.A metallic shield shall be included over all conductors under the outer jacket. [336.130](https://2023.antflix.net#336.130)", + "displayTitle": "336.130 Hazardous (Classified) Location Cable", + "children": [], + "url": "https://2023.antflix.net#336.130" + } + ], + "url": "https://2023.antflix.net#336" + }, + { + "displayTitle": "Article 337 Type P Cable", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_21_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for up through 2000 volt Type P cable (armored and unarmored). [337.1](https://2023.antflix.net#337.1)", + "displayTitle": "337.1 Scope", + "children": [], + "url": "https://2023.antflix.net#337.1" + }, + { + "body": "Type P cables and associated fittings shall be listed. [337.6](https://2023.antflix.net#337.6)", + "displayTitle": "337.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#337.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_21_II" + }, + { + "body": "Type P cable shall be permitted to be used: Under engineering supervision in industrial installations where conditions of maintenance and supervision ensure that only qualified persons monitor and service the system.In hazardous (classified) locations where specifically permitted by other articles in this Code. [337.10](https://2023.antflix.net#337.10)", + "displayTitle": "337.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#337.10" + }, + { + "body": "Type P cable shall not be installed or used: Where it will be exposed to physical damageWhere not specifically permitted by other articles in the Code [337.12](https://2023.antflix.net#337.12)", + "displayTitle": "337.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#337.12" + }, + { + "body": "The minimum bending radii during installations and handling in service shall be adequate to prevent damage to the cable. [337.24](https://2023.antflix.net#337.24)", + "displayTitle": "337.24 Bending Radius", + "children": [], + "url": "https://2023.antflix.net#337.24" + }, + { + "body": "Type P cable shall be supported and secured by cable ties listed and identified for securement and support; straps, hangers, or similar fittings; or other approved means designed and installed so as not to damage the cable. [337.30](https://2023.antflix.net#337.30)", + "displayTitle": "337.30 Securing and Supporting", + "children": [], + "url": "https://2023.antflix.net#337.30" + }, + { + "body": "Where single-conductor cables are used, the installation shall comply with 300.20. [337.31](https://2023.antflix.net#337.31)", + "displayTitle": "337.31 Single Conductors", + "children": [], + "url": "https://2023.antflix.net#337.31" + }, + { + "body": "The ampacity of Type P cable shall be determined in accordance with 310.14(A) or (B) for 14 AWG and larger conductors. For 18 AWG and 16 AWG conductors, the ampacities shall be determined in accordance with Table 402.5 or 310.14(B). When installed in cable tray, the ampacities shall be permitted to be determined in accordance with 392.80. The installation shall not exceed the temperature ratings of terminations and equipment. [337.80](https://2023.antflix.net#337.80)", + "displayTitle": "337.80 Ampacity", + "children": [], + "url": "https://2023.antflix.net#337.80" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_19_III" + }, + { + "body": "Conductors shall be of tinned copper. Conductors shall employ flexible stranding. The minimum conductor size shall be 18 AWG. [337.104](https://2023.antflix.net#337.104)", + "displayTitle": "337.104 Conductors", + "children": [], + "url": "https://2023.antflix.net#337.104" + }, + { + "body": "An equipment grounding conductor complying with 250.122 shall be provided within multiconductor Type P cable. [337.108](https://2023.antflix.net#337.108)", + "displayTitle": "337.108 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#337.108" + }, + { + "body": "Insulated conductors shall be a thermoset type identified for use in Type P cable. All conductors shall be suitable for wet locations. The minimum wall thickness shall be 0.76 mm (30 mils). [337.112](https://2023.antflix.net#337.112)", + "displayTitle": "337.112 Insulation", + "children": [], + "url": "https://2023.antflix.net#337.112" + }, + { + "body": "Metallic shield(s) shall be permitted over a single conductor or groups of conductors. [337.114](https://2023.antflix.net#337.114)", + "displayTitle": "337.114 Shield", + "children": [], + "url": "https://2023.antflix.net#337.114" + }, + { + "body": "Multiconductor cables shall have an overall nonmetallic jacket that is impervious to moisture, corrosion resistant, and sunlight resistant. When installed external to an enclosure or industrial machinery, single conductor cables shall have an overall nonmetallic jacket that is impervious to moisture, corrosion resistant, and sunlight resistant. Single conductor cables rated 2000 volts with conductor sizes equal to or larger than 4/0 AWG shall be permitted to use an increased insulation thickness in lieu of using a separate cable jacket. When the increased insulation thickness is used, the insulation material shall be sunlight resistant. [337.115](https://2023.antflix.net#337.115)", + "displayTitle": "337.115 Jacket", + "children": [], + "url": "https://2023.antflix.net#337.115" + }, + { + "body": "Armor shall be permitted over the jacket. If provided, the armor or metallic covering shall be a braided basket weave type consisting of wire laid closely together, flat and parallel, and forming a basket weave that shall firmly grip the cable. The wire shall be commercial bronze, tinned copper, stainless steel, or aluminum. The armor shall not be used as a current-carrying conductor or as an equipment grounding conductor. A nonmetallic jacket that conforms to 337.115 shall be provided over the armor. [337.116](https://2023.antflix.net#337.116)", + "displayTitle": "337.116 Armor", + "children": [], + "url": "https://2023.antflix.net#337.116" + }, + { + "body": "Type P cable shall be marked in accordance with 310.8. When an armor is provided, the cable shall be marked accordingly. [337.120](https://2023.antflix.net#337.120)", + "displayTitle": "337.120 Marking", + "children": [], + "url": "https://2023.antflix.net#337.120" + } + ], + "url": "https://2023.antflix.net#337" + }, + { + "displayTitle": "Article 338 Service-Entrance Cable: Types SE and USE", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_22_I" + }, + { + "body": "This article covers the use, installation, and construction specifications of service-entrance cable. [338.1](https://2023.antflix.net#338.1)", + "displayTitle": "338.1 Scope", + "children": [], + "url": "https://2023.antflix.net#338.1" + }, + { + "body": "Type SE and USE cables and associated fittings shall be listed. [338.6](https://2023.antflix.net#338.6)", + "displayTitle": "338.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#338.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_22_II" + }, + { + "displayTitle": "338.10 Uses Permitted", + "children": [ + { + "body": "Service-entrance cable shall be permitted to be used as service-entrance conductors and shall be installed in accordance with 230.6, 230.7, and Parts II, III, and IV of Article 230. [338.10_(A)](https://2023.antflix.net#338.10_(A))", + "displayTitle": "(A) Service-Entrance Conductors", + "children": [], + "url": "https://2023.antflix.net#338.10_(A)" + }, + { + "displayTitle": "(B) Branch Circuits or Feeders", + "children": [ + { + "body": "Type SE service-entrance cables shall be permitted in wiring systems where all of the circuit conductors of the cable are of the thermoset or thermoplastic type. [338.10_(B)_(1)](https://2023.antflix.net#338.10_(B)_(1))", + "displayTitle": "(1) Grounded Conductor Insulated", + "children": [], + "url": "https://2023.antflix.net#338.10_(B)_(1)" + }, + { + "body": "Type SE service-entrance cable shall be permitted for use where the insulated conductors are used for circuit wiring and the uninsulated conductor is used only for equipment grounding purposes. Exception: In existing installations, uninsulated conductors shall be permitted as a grounded conductor in accordance with 250.32 and 250.140, where the uninsulated grounded conductor of the cable originates in service equipment, and with 225.30 through 225.40. [338.10_(B)_(2)](https://2023.antflix.net#338.10_(B)_(2))", + "displayTitle": "(2) Use of Uninsulated Conductor", + "children": [], + "url": "https://2023.antflix.net#338.10_(B)_(2)" + }, + { + "body": "Type SE service-entrance cable used to supply appliances shall not be subject to conductor temperatures in excess of the temperature specified for the type of insulation involved. [338.10_(B)_(3)](https://2023.antflix.net#338.10_(B)_(3))", + "displayTitle": "(3) Temperature Limitations", + "children": [], + "url": "https://2023.antflix.net#338.10_(B)_(3)" + }, + { + "body": "Interior Installations. Interior installations shall comply with the following:In addition to the provisions of this article, Type SE service-entrance cable used for interior wiring shall comply with the installation requirements of Part II of Article 334, excluding 334.80.Where more than two Type SE cables containing two or more current-carrying conductors in each cable are installed in contact with thermal insulation, caulk, or sealing foam without maintaining spacing between cables, the ampacity of each conductor shall be adjusted in accordance with Table 310.15(C)(1).For Type SE cable with ungrounded conductor sizes 10 AWG and smaller, where installed in contact with thermal insulation, the ampacity shall be in accordance with 60\u00b0C (140\u00b0F) conductor temperature rating. The maximum conductor temperature rating shall be permitted to be used for ampacity adjustment and correction purposes, if the final ampacity does not exceed that for a 60\u00b0C (140\u00b0F) rated conductor.Exterior Installations. Exterior installations shall comply with the following:In addition to the provisions of this article, service-entrance cable used for feeders or branch circuits, where installed as exterior wiring, shall be installed in accordance with Part I of Article 225. The cable shall be supported in accordance with 334.30.Type USE cable installed as underground feeder and branch circuit cable shall comply with Part II of Article 340.Exception: Single-conductor Type USE and multi-rated USE conductors shall not be subject to the ampacity limitations of Part II of Article 340. [338.10_(B)_(4)](https://2023.antflix.net#338.10_(B)_(4))", + "displayTitle": "(4) Installation Methods for Branch Circuits and Feeders", + "children": [], + "url": "https://2023.antflix.net#338.10_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#338.10_(B)" + } + ], + "url": "https://2023.antflix.net#338.10" + }, + { + "displayTitle": "338.12 Uses Not Permitted", + "children": [ + { + "body": "Type SE cable shall not be used under the following conditions or in the following locations: Where subject to physical damage unless protected in accordance with 230.50(B)Underground with or without a racewayFor exterior branch circuits and feeder wiring unless the installation complies with Part I of Article 225 and is supported in accordance with 334.30 or is used as messenger-supported wiring as permitted in Part II of Article 396 [338.12_(A)](https://2023.antflix.net#338.12_(A))", + "displayTitle": "(A) Service-Entrance Cable", + "children": [], + "url": "https://2023.antflix.net#338.12_(A)" + }, + { + "body": "Type USE cable shall not be used under the following conditions or in the following locations: For interior wiringFor aboveground installations except where USE cable emerges from the ground and is terminated in an enclosure at an outdoor location and the cable is protected in accordance with 300.5(D)As aerial cable unless it is a multiconductor cable identified for use aboveground and installed as messenger-supported wiring in accordance with 225.10 and Part II of Article 396 [338.12_(B)](https://2023.antflix.net#338.12_(B))", + "displayTitle": "(B) Underground Service-Entrance Cable", + "children": [], + "url": "https://2023.antflix.net#338.12_(B)" + } + ], + "url": "https://2023.antflix.net#338.12" + }, + { + "body": "Bends in Types USE and SE cable shall be so made that the cable will not be damaged. The radius of the curve of the inner edge of any bend, during or after installation, shall not be less than five times the diameter of the cable. For flat cables, the major diameter dimension of the cable shall be used to determine the bending radius. [338.24](https://2023.antflix.net#338.24)", + "displayTitle": "338.24 Bending Radius", + "children": [], + "url": "https://2023.antflix.net#338.24" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_20_III" + }, + { + "displayTitle": "338.100 Construction", + "children": [ + { + "body": "Cabled assemblies of multiple single-conductor Type USE conductors shall be permitted for direct burial. All conductors shall be insulated. Informational Note: The term \"cabled\" refers to a manufacturing process of twisting single conductors together and may also be referred to as \"plexed.\" [338.100_(A)](https://2023.antflix.net#338.100_(A))", + "displayTitle": "(A) Assemblies", + "children": [], + "url": "https://2023.antflix.net#338.100_(A)" + }, + { + "body": "Type SE or USE cable with an overall covering containing two or more conductors shall be permitted to have one conductor uninsulated. [338.100_(B)](https://2023.antflix.net#338.100_(B))", + "displayTitle": "(B) Uninsulated Conductor", + "children": [], + "url": "https://2023.antflix.net#338.100_(B)" + } + ], + "url": "https://2023.antflix.net#338.100" + }, + { + "body": "Service-entrance cable shall be marked as required in 310.8. Cable with the neutral conductor smaller than the ungrounded conductors shall be so marked. [338.120](https://2023.antflix.net#338.120)", + "displayTitle": "338.120 Marking", + "children": [], + "url": "https://2023.antflix.net#338.120" + } + ], + "url": "https://2023.antflix.net#338" + }, + { + "displayTitle": "Article 340 Underground Feeder and Branch-Circuit Cable: Type UF", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_23_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for underground feeder and branch-circuit cable. Type UF. [340.1](https://2023.antflix.net#340.1)", + "displayTitle": "340.1 Scope", + "children": [], + "url": "https://2023.antflix.net#340.1" + }, + { + "body": "Type UF cable and associated fittings shall be listed. [340.6](https://2023.antflix.net#340.6)", + "displayTitle": "340.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#340.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_23_II" + }, + { + "body": "Type UF cable shall be permitted as follows: For use underground, including direct burial in the earth.As single-conductor cables. Where installed as single-conductor cables, all conductors of the feeder or branch circuit, including the grounded conductor and equipment grounding conductor, if any, shall be installed in accordance with 300.3.For wiring in wet, dry, or corrosive locations.Installed as nonmetallic-sheathed cable. Where so installed, the installation and conductor requirements shall comply with Parts II and III of Article 334, except for 334.12(B), and shall be of the multiconductor type.As single-conductor cables as the nonheating leads for heating cables as provided in 424.43.Supported by cable trays. Type UF cable supported by cable trays shall be of the multiconductor type.Informational Note: See 310.14(A)(3) for temperature limitation of conductors. [340.10](https://2023.antflix.net#340.10)", + "displayTitle": "340.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#340.10" + }, + { + "body": "Type UF cable shall not be used as follows: As service-entrance cableIn commercial garagesIn theaters and similar locationsIn motion picture studiosIn storage battery roomsIn hoistways or on elevators or escalatorsIn hazardous (classified) locations, except as specifically permitted by other articles in this CodeEmbedded in poured cement, concrete, or aggregate, except where embedded in plaster as nonheating leads where permitted in 424.43Where exposed to direct rays of the sun, unless identified as sunlight resistantInformational Note: The sunlight-resistant marking on the jacket does not apply to the individual conductors.Where subject to physical damageAs overhead cable, except where installed as messenger-supported wiring in accordance with Part II of Article 396 [340.12](https://2023.antflix.net#340.12)", + "displayTitle": "340.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#340.12" + }, + { + "body": "Bends in Type UF cable shall be so made that the cable is not damaged. The radius of the curve of the inner edge of any bend shall not be less than five times the diameter of the cable. For flat cables, the major diameter dimension of the cable shall be used to determine the bending radius. [340.24](https://2023.antflix.net#340.24)", + "displayTitle": "340.24 Bending Radius", + "children": [], + "url": "https://2023.antflix.net#340.24" + }, + { + "body": "The ampacity of Type UF cable shall be that of 60\u00b0C (140\u00b0F) conductors in accordance with 310.14. [340.80](https://2023.antflix.net#340.80)", + "displayTitle": "340.80 Ampacity", + "children": [], + "url": "https://2023.antflix.net#340.80" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_21_III" + }, + { + "body": "The conductors shall be sizes 14 AWG copper or 12 AWG aluminum or copper-clad aluminum through 4/0 AWG. [340.104](https://2023.antflix.net#340.104)", + "displayTitle": "340.104 Conductors", + "children": [], + "url": "https://2023.antflix.net#340.104" + }, + { + "body": "In addition to the insulated conductors, the cable shall be permitted to have an insulated or bare equipment grounding conductor. [340.108](https://2023.antflix.net#340.108)", + "displayTitle": "340.108 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#340.108" + }, + { + "body": "The conductors of Type UF shall be one of the moisture-resistant types listed in Table 310.4(1) that is suitable for branch-circuit wiring or one that is identified for such use. Where installed as a substitute wiring method for NM cable, the conductor insulation shall be rated 90\u00b0C (194\u00b0F). [340.112](https://2023.antflix.net#340.112)", + "displayTitle": "340.112 Insulation", + "children": [], + "url": "https://2023.antflix.net#340.112" + }, + { + "body": "The overall covering shall be flame retardant; moisture, fungus, and corrosion resistant; and suitable for direct burial in the earth. [340.116](https://2023.antflix.net#340.116)", + "displayTitle": "340.116 Sheath", + "children": [], + "url": "https://2023.antflix.net#340.116" + } + ], + "url": "https://2023.antflix.net#340" + }, + { + "displayTitle": "Article 342 Intermediate Metal Conduit (IMC)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_24_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for intermediate metal conduit (IMC) and associated fittings. [342.1](https://2023.antflix.net#342.1)", + "displayTitle": "342.1 Scope", + "children": [], + "url": "https://2023.antflix.net#342.1" + }, + { + "body": "IMC, factory elbows and couplings, and associated fittings shall be listed. [342.6](https://2023.antflix.net#342.6)", + "displayTitle": "342.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#342.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_24_II" + }, + { + "displayTitle": "342.10 Uses Permitted", + "children": [ + { + "body": "Use of IMC shall be permitted under all atmospheric conditions and occupancies. [342.10_(A)](https://2023.antflix.net#342.10_(A))", + "displayTitle": "(A) All Atmospheric Conditions and Occupancies", + "children": [], + "url": "https://2023.antflix.net#342.10_(A)" + }, + { + "body": "IMC, elbows, couplings, and fittings shall be permitted to be installed in concrete, in direct contact with the earth, in direct burial applications, or in areas subject to severe corrosive influences where protected by corrosion protection approved for the condition. [342.10_(B)](https://2023.antflix.net#342.10_(B))", + "displayTitle": "(B) Corrosion Environments", + "children": [], + "url": "https://2023.antflix.net#342.10_(B)" + }, + { + "body": "IMC shall be permitted to be installed in or under cinder fill where subject to permanent moisture where protected on all sides by a layer of noncinder concrete not less than 50 mm (2 in.) thick; where the conduit is not less than 450 mm (18 in.) under the fill; or where protected by corrosion protection approved for the condition. [342.10_(C)](https://2023.antflix.net#342.10_(C))", + "displayTitle": "(C) Cinder Fill", + "children": [], + "url": "https://2023.antflix.net#342.10_(C)" + }, + { + "body": "All supports, bolts, straps, screws, and so forth, shall be of corrosion-resistant materials or protected against corrosion by corrosion-resistant materials. Informational Note: See 300.6 for protection against corrosion. [342.10_(D)](https://2023.antflix.net#342.10_(D))", + "displayTitle": "(D) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#342.10_(D)" + }, + { + "body": "IMC shall be permitted to be installed where subject to severe physical damage. [342.10_(E)](https://2023.antflix.net#342.10_(E))", + "displayTitle": "(E) Severe Physical Damage", + "children": [], + "url": "https://2023.antflix.net#342.10_(E)" + } + ], + "url": "https://2023.antflix.net#342.10" + }, + { + "body": "Where practicable, dissimilar metals in contact anywhere in the system shall be avoided to eliminate the possibility of galvanic action. Stainless steel and aluminum fittings and enclosures shall be permitted to be used with galvanized steel IMC where not subject to severe corrosive influences. Stainless steel IMC shall only be used with the following:Stainless steel fittingsStainless steel boxes and enclosuresSteel (galvanized, painted, powder or PVC coated, and so forth) boxes and enclosures when not subject to severe corrosive influencesStainless steel, nonmetallic, or approved accessories [342.14](https://2023.antflix.net#342.14)", + "displayTitle": "342.14 Dissimilar Metals", + "children": [], + "url": "https://2023.antflix.net#342.14" + }, + { + "displayTitle": "342.20 Size", + "children": [ + { + "body": "IMC smaller than metric designator 16 (trade size 1/2) shall not be used. [342.20_(A)](https://2023.antflix.net#342.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#342.20_(A)" + }, + { + "body": "IMC larger than metric designator 155 (trade size 6) shall not be used. Informational Note: See 300.1(C) for the metric designators and trade sizes. These are for identification purposes only and do not relate to actual dimensions. [342.20_(B)](https://2023.antflix.net#342.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#342.20_(B)" + } + ], + "url": "https://2023.antflix.net#342.20" + }, + { + "body": "The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. [342.22](https://2023.antflix.net#342.22)", + "displayTitle": "342.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#342.22" + }, + { + "displayTitle": "342.24 Bends", + "children": [ + { + "body": "Bends of IMC shall be so made that the conduit will not be damaged and the internal diameter of the conduit will not be effectively reduced. The radius of the curve of any field bend to the centerline of the conduit shall not be less than indicated in Table 2, Chapter 9. [342.24_(A)](https://2023.antflix.net#342.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#342.24_(A)" + }, + { + "body": "The total degrees of bends in a conduit run shall not exceed 360 degrees between pull points. [342.24_(B)](https://2023.antflix.net#342.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#342.24_(B)" + } + ], + "url": "https://2023.antflix.net#342.24" + }, + { + "body": "All cut ends shall be reamed or otherwise finished to remove rough edges. Where conduit is threaded in the field, a standard cutting die with a taper of 1 in 16 (3/4 in. taper per foot) shall be used. Informational Note: See ANSI/ASME B1.20.1-2013, Standard for Pipe Threads, General Purpose (Inch). [342.28](https://2023.antflix.net#342.28)", + "displayTitle": "342.28 Reaming and Threading", + "children": [], + "url": "https://2023.antflix.net#342.28" + }, + { + "body": "IMC shall be installed as a complete system in accordance with 300.18 and shall be securely fastened in place and supported in accordance with 342.30(A) and (B). [342.30](https://2023.antflix.net#342.30)", + "displayTitle": "342.30 Securing and Supporting", + "children": [ + { + "body": "IMC shall be secured in accordance with one of the following: IMC shall be securely fastened within 900 mm (3 ft) of each outlet box, junction box, device box, cabinet, conduit body, or other conduit termination.Where structural members do not readily permit fastening within 900 mm (3 ft), fastening shall be permitted to be increased to a distance of 1.5 m (5 ft).Where approved, conduit shall not be required to be securely fastened within 900 nun (3 ft) of the service head for above-the-roof termination of a mast.Exception: For concealed work in finished buildings or prefinished wall panels where such securing is impracticable, unbroken lengths (without coupling) of IMC shall be permitted to be fished. [342.30_(A)](https://2023.antflix.net#342.30_(A))", + "displayTitle": "(A) Securely Fastened", + "children": [], + "url": "https://2023.antflix.net#342.30_(A)" + }, + { + "body": "IMC shall be supported in accordance with one of the following: Conduit shall be supported at intervals not exceeding 3 m (10 ft).The distance between supports for straight runs of conduit shall be permitted in accordance with Table 344.30(B), provided the conduit is made up with threaded couplings and supports that prevent transmission of stresses to termination where conduit is deflected between supports.Exposed vertical risers from industrial machinery or fixed equipment shall be permitted to be supported at intervals not exceeding 6 m (20 ft) if the conduit is made up with threaded couplings, the conduit is supported and securely fastened at the top and bottom of the riser, and no other means of intermediate support is readily available.Horizontal runs of IMC supported by openings through framing members at intervals not exceeding 3 m (10 ft) and securely fastened within 900 mm (3 ft) of termination points shall be permitted. [342.30_(B)](https://2023.antflix.net#342.30_(B))", + "displayTitle": "(B) Supports", + "children": [], + "url": "https://2023.antflix.net#342.30_(B)" + } + ], + "url": "https://2023.antflix.net#342.30" + }, + { + "displayTitle": "342.42 Couplings and Connectors", + "children": [ + { + "body": "Threadless couplings and connectors used with conduit shall be made tight. Where buried in masonry or concrete, they shall be the concretetight type. Where installed in wet locations, they shall comply with 314.15. Threadless couplings and connectors shall not be used on threaded conduit ends unless listed for the purpose. [342.42_(A)](https://2023.antflix.net#342.42_(A))", + "displayTitle": "(A) Threadless", + "children": [], + "url": "https://2023.antflix.net#342.42_(A)" + }, + { + "body": "Running threads shall not be used on conduit for connection at couplings. [342.42_(B)](https://2023.antflix.net#342.42_(B))", + "displayTitle": "(B) Running Threads", + "children": [], + "url": "https://2023.antflix.net#342.42_(B)" + } + ], + "url": "https://2023.antflix.net#342.42" + }, + { + "body": "Where a conduit enters a box, fitting, or other enclosure, a bushing shall be provided to protect the wires from abrasion unless the box, fitting, or enclosure is designed to provide such protection. Informational Note: See 300.4(G) for the protection of conductors 4 AWG and larger at bushings. [342.46](https://2023.antflix.net#342.46)", + "displayTitle": "342.46 Bushings", + "children": [], + "url": "https://2023.antflix.net#342.46" + }, + { + "body": "Splices and taps shall be made in accordance with 300.15. [342.56](https://2023.antflix.net#342.56)", + "displayTitle": "342.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#342.56" + }, + { + "body": "IMC shall be permitted as an equipment grounding conductor. [342.60](https://2023.antflix.net#342.60)", + "displayTitle": "342.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#342.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_22_III" + }, + { + "body": "IMC shall be made of one of the following: Steel, with protective coatingsStainless steel [342.100](https://2023.antflix.net#342.100)", + "displayTitle": "342.100 Construction", + "children": [], + "url": "https://2023.antflix.net#342.100" + }, + { + "body": "Each length shall be clearly and durably marked at least every 1.5 m (5 ft) with the letters IMC. Each length shall be marked as required in the first sentence of 110.21(A). [342.120](https://2023.antflix.net#342.120)", + "displayTitle": "342.120 Marking", + "children": [], + "url": "https://2023.antflix.net#342.120" + } + ], + "url": "https://2023.antflix.net#342" + }, + { + "displayTitle": "Article 344 Rigid Metal Conduit (RMC)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_25_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for rigid metal conduit (RMC) and associated fittings. [344.1](https://2023.antflix.net#344.1)", + "displayTitle": "344.1 Scope", + "children": [], + "url": "https://2023.antflix.net#344.1" + }, + { + "body": "RMC, factory elbows and couplings, and associated fittings shall be listed. [344.6](https://2023.antflix.net#344.6)", + "displayTitle": "344.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#344.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_25_II" + }, + { + "displayTitle": "344.10 Uses Permitted", + "children": [ + { + "displayTitle": "(A) Atmospheric Conditions and Occupancies", + "children": [ + { + "body": "Galvanized steel, stainless steel, and red brass RMC shall be permitted under all atmospheric conditions and occupancies. [344.10_(A)_(1)](https://2023.antflix.net#344.10_(A)_(1))", + "displayTitle": "(1) Galvanized Steel, Stainless Steel, and Red Brass RMC", + "children": [], + "url": "https://2023.antflix.net#344.10_(A)_(1)" + }, + { + "body": "Aluminum RMC shall be permitted to be installed where approved for the environment. [344.10_(A)_(2)](https://2023.antflix.net#344.10_(A)_(2))", + "displayTitle": "(2) Aluminum RMC", + "children": [], + "url": "https://2023.antflix.net#344.10_(A)_(2)" + }, + { + "body": "Ferrous raceways and fittings protected from corrosion solely by enamel shall be permitted only indoors and in occupancies not subject to severe corrosive influences. [344.10_(A)_(3)](https://2023.antflix.net#344.10_(A)_(3))", + "displayTitle": "(3) Ferrous Raceways and Fittings", + "children": [], + "url": "https://2023.antflix.net#344.10_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#344.10_(A)" + }, + { + "displayTitle": "(B) Corrosive Environments", + "children": [ + { + "body": "Galvanized steel, stainless steel, and red brass RMC, elbows, couplings, and fittings shall be permitted to be installed in concrete, in direct contact with the earth, in direct burial applications, or in areas subject to severe corrosive influences where protected by corrosion protection approved for the condition. [344.10_(B)_(1)](https://2023.antflix.net#344.10_(B)_(1))", + "displayTitle": "(1) Galvanized Steel, Stainless Steel, and Red Brass RMC, Elbows, Couplings, and Fittings", + "children": [], + "url": "https://2023.antflix.net#344.10_(B)_(1)" + }, + { + "body": "Aluminum RMC shall be provided with approved supplementary corrosion protection where encased in concrete or in direct contact with the earth, or in direct burial applications where identified for the application. [344.10_(B)_(2)](https://2023.antflix.net#344.10_(B)_(2))", + "displayTitle": "(2) Supplementary Protection of Aluminum RMC", + "children": [], + "url": "https://2023.antflix.net#344.10_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#344.10_(B)" + }, + { + "body": "Galvanized steel, stainless steel, and red brass RMC shall be permitted to be installed in or under cinder fill where subject to permanent moisture where protected on all sides by a layer of noncinder concrete not less than 50 mm (2 in.) thick; where the conduit is not less than 450 mm (18 in.) under the fill; or where protected by corrosion protection approved for the condition. [344.10_(C)](https://2023.antflix.net#344.10_(C))", + "displayTitle": "(C) Cinder Fill", + "children": [], + "url": "https://2023.antflix.net#344.10_(C)" + }, + { + "body": "All supports, bolts, straps, screws, and so forth, shall be of corrosion-resistant materials or protected against corrosion by corrosion-resistant materials. Informational Note: See 300.6 for protection against corrosion. [344.10_(D)](https://2023.antflix.net#344.10_(D))", + "displayTitle": "(D) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#344.10_(D)" + }, + { + "body": "RMC shall be permitted to be installed where subject to severe physical damage. [344.10_(E)](https://2023.antflix.net#344.10_(E))", + "displayTitle": "(E) Severe Physical Damage", + "children": [], + "url": "https://2023.antflix.net#344.10_(E)" + } + ], + "url": "https://2023.antflix.net#344.10" + }, + { + "body": "Where practicable, dissimilar metals in contact anywhere in the system shall be avoided to eliminate the possibility of galvanic action. Stainless steel and aluminum fittings and enclosures shall be permitted to be used with galvanized steel RMC, and galvanized steel fittings and enclosures shall be permitted to be used with aluminum RMC where not subject to severe corrosive influences. Stainless steel rigid conduit shall only be used with the following: Stainless steel fittingsStainless steel boxes and enclosuresSteel (galvanized, painted, powder or PVC coated, and so forth) boxes and enclosures when not subject to severe corrosive influencesStainless steel, nonmetallic, or approved accessories [344.14](https://2023.antflix.net#344.14)", + "displayTitle": "344.14 Dissimilar Metals", + "children": [], + "url": "https://2023.antflix.net#344.14" + }, + { + "displayTitle": "344.20 Size", + "children": [ + { + "body": "RMC smaller than metric designator 16 (trade size 1/2) shall not be used. Exception: Metric designator 12 (trade size 3/8) shall be permitted for enclosing the leads of motors as permitted in 430.245(B). [344.20_(A)](https://2023.antflix.net#344.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#344.20_(A)" + }, + { + "body": "RMC larger than metric designator 155 (trade size 6) shall not be used. Informational Note: See 300.1(C) for the metric designators and trade sizes. These are for identification purposes only and do not relate to actual dimensions. [344.20_(B)](https://2023.antflix.net#344.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#344.20_(B)" + } + ], + "url": "https://2023.antflix.net#344.20" + }, + { + "body": "The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. [344.22](https://2023.antflix.net#344.22)", + "displayTitle": "344.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#344.22" + }, + { + "displayTitle": "344.24 Bends", + "children": [ + { + "body": "Bends of RMC shall be so made that the conduit will not be damaged and so that the internal diameter of the conduit will not be effectively reduced. The radius of the curve of any field bend to the centerline of the conduit shall not be less than indicated in Table 2, Chapter 9 [344.24_(A)](https://2023.antflix.net#344.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#344.24_(A)" + }, + { + "body": "The total degrees of bends in a conduit run shall not exceed 360 degrees between pull points. [344.24_(B)](https://2023.antflix.net#344.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#344.24_(B)" + } + ], + "url": "https://2023.antflix.net#344.24" + }, + { + "body": "All cut ends shall be reamed or otherwise finished to remove rough edges. Where conduit is threaded in the field, a standard cutting die with a 1 in 16 taper (3/4 in. taper per foot) shall be used. PVC-coated RMC shall be threaded in accordance with manufacturer's instructions to prevent damage to the exterior coating. Informational Note No. 1: See ANSI/ASME B1.20.1-2013, Standard for Pipe Threads, General Purpose (Inch). Informational Note No. 2: See NECA 101-2013, Standard for Installing Steel Conduits (RMC, IMC, EMT), for information on threading and clamping methods for RMC and PVC-coated RMC. [344.28](https://2023.antflix.net#344.28)", + "displayTitle": "344.28 Reaming and Threading", + "children": [], + "url": "https://2023.antflix.net#344.28" + }, + { + "body": "RMC shall be installed as a complete system in accordance with 300.18 and shall be securely fastened in place and supported in accordance with 344.30(A) and (B). [344.30](https://2023.antflix.net#344.30)", + "displayTitle": "344.30 Securing and Supporting", + "children": [ + { + "body": "RMC shall be secured in accordance with one of the following: RMC shall be securely fastened within 900 mm (3 ft) of each outlet box, junction box, device box, cabinet, conduit body, or other conduit termination.Fastening shall be permitted to be increased to a distance of 1.5 m (5 ft) where structural members do not readily permit fastening within 900 mm (3 ft).Where approved, conduit shall not be required to be securely fastened within 900 mm (3 ft) of the service head for above-the-roof termination of a mast.Exception: For concealed work in finished buildings or prefinished wall panels where such securing is impracticable, unbroken lengths (without coupling) of RMC shall be permitted to be fished, [344.30_(A)](https://2023.antflix.net#344.30_(A))", + "displayTitle": "(A) Securely Fastened", + "children": [], + "url": "https://2023.antflix.net#344.30_(A)" + }, + { + "body": "RMC shall be supported in accordance with one of the following: Conduit shall be supported at intervals not exceeding 3 m (10 ft).The distance between supports for straight runs of conduit shall be permitted in accordance with Table 344.30(B), provided the conduit is made up with threaded couplings and supports that prevent transmission of stresses to termination where conduit is deflected between supports.Exposed vertical risers from industrial machinery or fixed equipment shall be permitted to be supported at intervals not exceeding 6 m (20 ft) if the conduit is made up with threaded couplings, the conduit is supported and securely fastened at the top and bottom of the riser, and no other means of intermediate support is readily available.Horizontal runs of RMC supported by openings through framing members at intervals not exceeding 3 m (10 ft) and securely fastened within 900 mm (3 ft) of termination points shall be permitted.Table 344.30(B) Supports for Rigid Metal Conduit Conduit Size Maximum Distance Between Rigid Metal Conduit Supports Metric Designator Trade Size m ft 16\u201421 1/2\u20143/4 3.0 10 27 1 3.7 12 35\u201441 11/4\u201411/2 4.3 14 53\u201463 2\u201421/2 4.9 16 78 and larger 3 and larger 6.1 20 [344.30_(B)](https://2023.antflix.net#344.30_(B))", + "displayTitle": "(B) Supports", + "children": [], + "url": "https://2023.antflix.net#344.30_(B)" + } + ], + "url": "https://2023.antflix.net#344.30" + }, + { + "displayTitle": "344.42 Couplings and Connectors", + "children": [ + { + "body": "Threadless couplings and connectors used with conduit shall be made tight. Where buried in masonry or concrete, they shall be the concrete tight type. Where installed in wet locations, they shall comply with 314.15. Threadless couplings and connectors shall not be used on threaded conduit ends unless listed for the purpose. [344.42_(A)](https://2023.antflix.net#344.42_(A))", + "displayTitle": "(A) Threadless", + "children": [], + "url": "https://2023.antflix.net#344.42_(A)" + }, + { + "body": "Running threads shall not be used on conduit for connection at couplings. [344.42_(B)](https://2023.antflix.net#344.42_(B))", + "displayTitle": "(B) Running Threads", + "children": [], + "url": "https://2023.antflix.net#344.42_(B)" + } + ], + "url": "https://2023.antflix.net#344.42" + }, + { + "body": "Where a conduit enters a box, fitting, or other enclosure, a bushing shall be provided to protect the wires from abrasion unless the box, fitting, or enclosure is designed to provide such protection. Informational Note: See 300.4(G) for the protection of conductors sizes 4 AWG and larger at bushings. [344.46](https://2023.antflix.net#344.46)", + "displayTitle": "344.46 Bushings", + "children": [], + "url": "https://2023.antflix.net#344.46" + }, + { + "body": "Splices and taps shall be made in accordance with 300.15. [344.56](https://2023.antflix.net#344.56)", + "displayTitle": "344.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#344.56" + }, + { + "body": "RMC shall be permitted as an equipment grounding conductor. [344.60](https://2023.antflix.net#344.60)", + "displayTitle": "344.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#344.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_23_III" + }, + { + "body": "RMC shall be made of one of the following: Steel with protective coatingsAluminumRed brassStainless steel [344.100](https://2023.antflix.net#344.100)", + "displayTitle": "344.100 Construction", + "children": [], + "url": "https://2023.antflix.net#344.100" + }, + { + "body": "Each length shall be clearly and durably identified in every 3 m (10 ft) as required in the first sentence of 110.21(A). Nonferrous conduit of corrosion-resistant material shall have suitable markings. [344.120](https://2023.antflix.net#344.120)", + "displayTitle": "344.120 Marking", + "children": [], + "url": "https://2023.antflix.net#344.120" + } + ], + "url": "https://2023.antflix.net#344" + }, + { + "displayTitle": "Article 348 Flexible Metal Conduit (FMC)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_26_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for flexible metal conduit (FMC) and associated fittings. [348.1](https://2023.antflix.net#348.1)", + "displayTitle": "348.1 Scope", + "children": [], + "url": "https://2023.antflix.net#348.1" + }, + { + "body": "FMC shall not be reconditioned. [348.2](https://2023.antflix.net#348.2)", + "displayTitle": "348.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#348.2" + }, + { + "body": "FMC and associated fittings shall be listed. [348.6](https://2023.antflix.net#348.6)", + "displayTitle": "348.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#348.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_26_II" + }, + { + "body": "FMC shall be permitted to be used in exposed and concealed locations. [348.10](https://2023.antflix.net#348.10)", + "displayTitle": "348.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#348.10" + }, + { + "body": "FMC shall not be used in the following: In wet locationsIn hoistways, other than as permitted in 620.21 (A)(1)In storage battery roomsIn any hazardous (classified) location except as permitted by other articles in this CodeWhere exposed to materials having a deteriorating effect on the installed conductors, such as oil or gasolineUnderground or embedded in poured concrete or aggregateWhere subject to physical damage [348.12](https://2023.antflix.net#348.12)", + "displayTitle": "348.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#348.12" + }, + { + "displayTitle": "348.20 Size", + "children": [ + { + "body": "FMC less than metric designator 16 (trade size 1/2) shall not be used unless permitted in 348.20(A)(1) through (A)(5) for metric designator 12 (trade size 3/8). For enclosing the leads of motors as permitted in 430.245(B)In lengths not in excess of 1.8 m (6 ft) for any of the following uses:For utilization equipmentAs part of a listed assemblyFor tap connections to luminaires as permitted in 410.117(C)For manufactured wiring systems as permitted in 604.100(A)In hoistways as permitted in 620.21(A)(1)As part of a listed assembly to connect wired luminaire sections as permitted in 410.137(C) [348.20_(A)](https://2023.antflix.net#348.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#348.20_(A)" + }, + { + "body": "FMC larger than metric designator 103 (trade size 4) shall not be used. Informational Note: See 300.1(C) for the metric designators and trade sizes. These are for identification purposes only and do not relate to actual dimensions. [348.20_(B)](https://2023.antflix.net#348.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#348.20_(B)" + } + ], + "url": "https://2023.antflix.net#348.20" + }, + { + "body": "The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9, or as permitted in Table 348.22, or for metric designator 12 (trade size 3/8). Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. Table 348.22 Maximum Number of Insulated Conductors in Metric Designator 12 (Trade Size 3/8) Flexible Metal Conduit (FMC)* Size (AWG) Types RFH-2, SF-2 Types TF, XHHW, TW Types TFN, THHN, THWN Types FEP, FEBP, PF, PGF Fittings Inside Conduit Fittings Outside Conduit Fittings Inside Conduit Fittings Outside Conduit Fittings Inside Conduit Fittings Outside Conduit Fittings Inside Conduit Fittings Outside Conduit 18 2 3 3 5 5 8 5 8 16 1 2 3 4 4 6 4 6 14 1 2 2 3 3 4 3 4 12 - - 1 2 2 3 2 3 10 - - 1 1 1 1 1 2 *In addition, one insulated, covered, or bare equipment grounding conductor of the same size shall be permitted. [348.22](https://2023.antflix.net#348.22)", + "displayTitle": "348.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#348.22" + }, + { + "displayTitle": "348.24 Bends", + "children": [ + { + "body": "Bends in conduit shall be made so that the conduit is not damaged and the internal diameter of the conduit is not effectively reduced. Bends shall be permitted to be made manually without auxiliary equipment. The radius of the curve to the centerline of any bend shall not be less than shown in Table 2, Chapter 9 using the column \"Other Bends.\" [348.24_(A)](https://2023.antflix.net#348.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#348.24_(A)" + }, + { + "body": "The total degrees of bends in a conduit run shall not exceed 360 degrees between pull points. [348.24_(B)](https://2023.antflix.net#348.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#348.24_(B)" + } + ], + "url": "https://2023.antflix.net#348.24" + }, + { + "body": "All cut ends shall be trimmed or otherwise finished to remove rough edges, except where fittings that thread into the convolutions are used. [348.28](https://2023.antflix.net#348.28)", + "displayTitle": "348.28 Trimming", + "children": [], + "url": "https://2023.antflix.net#348.28" + }, + { + "body": "FMC shall be securely fastened in place and supported in accordance with 348.30(A) and (B). [348.30](https://2023.antflix.net#348.30)", + "displayTitle": "348.30 Securing and Supporting", + "children": [ + { + "body": "FMC shall be securely fastened in place by an approved means within 300 mm (12 in.) of each box, cabinet, conduit body, or other conduit termination and shall be supported and secured at intervals not to exceed 1.4 m (41/2 ft). Where used, cable ties shall be listed and be identified for securement and support. Exception No. 1: Where FMC is fished between access points through concealed spaces in finished buildings or structures and supporting is impracticable. Exception No. 2: Where flexibility is necessary after installation, lengths from the last point where the raceway is securely fastened shall not exceed the following: (1) 900 mm (3 ft) for metric designators 16 through 35 (trade sizes 1/2 through 11/4) (2) 1200 mm (4 ft) for metric designators 41 through 53 (trade sizes 11/2 through 2) (3) 1500 mm (5 ft) for metric designators 63 (trade size 21/2) and larger Exception No. 3: Lengths not exceeding 1.8 m (6 ft) from a luminaire terminal connection for tap connections to luminaires as permitted in 410.117(C). Exception No. 4: Lengths not exceeding 1.8 m (6 ft) from the last point where the raceway is securely fastened for connections within an accessible ceiling to a luminaire(s) or other equipment. For the purposes of the exceptions, listed FMC fittings shall be permitted as a means of securement and support. [348.30_(A)](https://2023.antflix.net#348.30_(A))", + "displayTitle": "(A) Securely Fastened", + "children": [], + "url": "https://2023.antflix.net#348.30_(A)" + }, + { + "body": "Horizontal runs of FMC supported by openings through framing members at intervals not greater than 1.4 m (41/2 ft) and securely fastened within 300 mm (12 in.) of termination points shall be permitted. [348.30_(B)](https://2023.antflix.net#348.30_(B))", + "displayTitle": "(B) Supports", + "children": [], + "url": "https://2023.antflix.net#348.30_(B)" + } + ], + "url": "https://2023.antflix.net#348.30" + }, + { + "body": "Angle connectors shall not be concealed. [348.42](https://2023.antflix.net#348.42)", + "displayTitle": "348.42 Couplings and Connectors", + "children": [], + "url": "https://2023.antflix.net#348.42" + }, + { + "body": "Splices and taps shall be made in accordance with 300.15. [348.56](https://2023.antflix.net#348.56)", + "displayTitle": "348.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#348.56" + }, + { + "displayTitle": "348.60 Grounding and Bonding", + "children": [ + { + "body": "FMC shall be permitted to be used as an equipment grounding conductor when installed in accordance with 250.118(A)(5) where flexibility is not required after installation. [348.60_(A)](https://2023.antflix.net#348.60_(A))", + "displayTitle": "(A) Fixed Installation", + "children": [], + "url": "https://2023.antflix.net#348.60_(A)" + }, + { + "body": "An equipment grounding conductor shall be installed where flexibility is necessary to minimize the transmission of vibration from equipment or to provide flexibility for equipment that requires movement after installation. [348.60_(B)](https://2023.antflix.net#348.60_(B))", + "displayTitle": "(B) Flexible Installation", + "children": [], + "url": "https://2023.antflix.net#348.60_(B)" + }, + { + "body": "Where required or installed, equipment grounding conductors shall be installed in accordance with 250.134. [348.60_(C)](https://2023.antflix.net#348.60_(C))", + "displayTitle": "(C) Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#348.60_(C)" + }, + { + "body": "Where required or installed, equipment bonding jumpers shall be installed in accordance with 250.102. [348.60_(D)](https://2023.antflix.net#348.60_(D))", + "displayTitle": "(D) Equipment Bonding Jumpers", + "children": [], + "url": "https://2023.antflix.net#348.60_(D)" + } + ], + "url": "https://2023.antflix.net#348.60" + } + ], + "url": "https://2023.antflix.net#348" + }, + { + "displayTitle": "Article 350 Liquidtight Flexible Metal Conduit (LFMC)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_27_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for liquidtight flexible metal conduit (LFMC) and associated fittings. [350.1](https://2023.antflix.net#350.1)", + "displayTitle": "350.1 Scope", + "children": [], + "url": "https://2023.antflix.net#350.1" + }, + { + "body": "LFMC shall not be reconditioned. [350.2](https://2023.antflix.net#350.2)", + "displayTitle": "350.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#350.2" + }, + { + "body": "LFMC and associated fittings shall be listed. [350.6](https://2023.antflix.net#350.6)", + "displayTitle": "350.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#350.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_27_II" + }, + { + "body": "LFMC shall be permitted to be used in exposed or concealed locations as follows: Where conditions of installation, operation, or maintenance require flexibility or protection from machine oils, liquids, vapors, or solids.In hazardous (classified) locations where specifically permitted by Chapter 5.For direct burial where listed and marked for the purpose.Conductors or cables rated at a temperature higher than the listed temperature rating of LFMC shall be permitted to be installed in LFMC, provided the conductors or cables are not operated at a temperature higher than the listed temperature rating of the LFMC. [350.10](https://2023.antflix.net#350.10)", + "displayTitle": "350.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#350.10" + }, + { + "body": "LFMC shall not be used where subject to physical damage. [350.12](https://2023.antflix.net#350.12)", + "displayTitle": "350.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#350.12" + }, + { + "displayTitle": "350.20 Size", + "children": [ + { + "body": "LFMC smaller than metric designator 16 (trade size 1/2) shall not be used. Exception: LFMC of metric designator 12 (trade size 3/8) shall be permitted as covered in 348.20(A). [350.20_(A)](https://2023.antflix.net#350.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#350.20_(A)" + }, + { + "body": "The maximum size of LFMC shall be metric designator 103 (trade size 4). Informational Note: See 300.1(C) for the metric designators and trade sizes. These are for identification purposes only and do not relate to actual dimensions. [350.20_(B)](https://2023.antflix.net#350.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#350.20_(B)" + } + ], + "url": "https://2023.antflix.net#350.20" + }, + { + "displayTitle": "350.22 Number of Conductors or Cables", + "children": [ + { + "body": "The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. [350.22_(A)](https://2023.antflix.net#350.22_(A))", + "displayTitle": "(A) Metric Designators 16 through 103 (Trade Sizes 1/2 through 4)", + "children": [], + "url": "https://2023.antflix.net#350.22_(A)" + }, + { + "body": "The number of conductors shall not exceed that permitted in Table 348.22, \"Fittings Outside Conduit\" columns. [350.22_(B)](https://2023.antflix.net#350.22_(B))", + "displayTitle": "(B) Metric Designator 12 (Trade Size 3/8)", + "children": [], + "url": "https://2023.antflix.net#350.22_(B)" + } + ], + "url": "https://2023.antflix.net#350.22" + }, + { + "displayTitle": "350.24 Bends", + "children": [ + { + "body": "Bends in conduit shall be so made that the conduit will not be damaged and the internal diameter of the conduit will not be effectively reduced. Bends shall be permitted to be made manually without auxiliary equipment. The radius of the curve to the centerline of any bend shall not be less than required in Table 2, Chapter 9 using the column \"Other Bends.\" [350.24_(A)](https://2023.antflix.net#350.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#350.24_(A)" + }, + { + "body": "The total degrees of bends in a conduit run shall not exceed 360 degrees between pull points. [350.24_(B)](https://2023.antflix.net#350.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#350.24_(B)" + } + ], + "url": "https://2023.antflix.net#350.24" + }, + { + "body": "All cut ends of conduit shall be trimmed inside and outside to remove rough edges. [350.28](https://2023.antflix.net#350.28)", + "displayTitle": "350.28 Trimming", + "children": [], + "url": "https://2023.antflix.net#350.28" + }, + { + "body": "LFMC shall be securely fastened in place and supported in accordance with 350.30(A) and (B). [350.30](https://2023.antflix.net#350.30)", + "displayTitle": "350.30 Securing and Supporting", + "children": [ + { + "body": "LFMC shall be securely fastened in place by an approved means within 300 mm (12 in.) of each box, cabinet, conduit body, or other conduit termination and shall be supported and secured at intervals not to exceed 1.4 m (41/2 ft). Where used, cable ties shall be listed and be identified for securement and support. Exception No. 1: Where LFMC is fished between access points through concealed spaces in finished buildings or structures and supporting is impractical. Exception No. 2: Where flexibility is necessary after installation, lengths from the last point where the raceway is securely fastened shall not exceed the following: (1) 900 mm (3 ft) for metric designators 16 through 35 (trade sizes 1/2 through 11/4) (2) 1200 mm (4 ft) for metric designators 41 through 53 (trade sizes 11/2 through 2) (3) 1500 mm (5 ft) for metric designators 63 (trade size 21/2) and larger Exception No. 3: Lengths not exceeding 1.8 m (6 ft) from a luminaire terminal connection for tap conductors to luminaires, as permitted in 410.117(C). Exception No. 4: Lengths not exceeding 1.8 m (6 ft) from the last point where the raceway is securely fastened for connections within an accessible ceiling to luminaire(s) or other equipment. For the purposes of the exceptions, listed LFMC fittings shall be permitted as a means of securement and support. [350.30_(A)](https://2023.antflix.net#350.30_(A))", + "displayTitle": "(A) Securely Fastened", + "children": [], + "url": "https://2023.antflix.net#350.30_(A)" + }, + { + "body": "Horizontal runs of LFMC supported by openings through framing members at intervals not greater than 1.4 m (41/2 ft) and securely fastened within 300 mm (12 in.) of termination points shall be permitted. [350.30_(B)](https://2023.antflix.net#350.30_(B))", + "displayTitle": "(B) Supports", + "children": [], + "url": "https://2023.antflix.net#350.30_(B)" + } + ], + "url": "https://2023.antflix.net#350.30" + }, + { + "body": "Only fittings listed for use with LFMC shall be used. Angle connectors shall not be concealed. Straight LFMC fittings shall be permitted for direct burial where marked. [350.42](https://2023.antflix.net#350.42)", + "displayTitle": "350.42 Couplings and Connectors", + "children": [], + "url": "https://2023.antflix.net#350.42" + }, + { + "body": "Splices and taps shall be made in accordance with 300.15. [350.56](https://2023.antflix.net#350.56)", + "displayTitle": "350.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#350.56" + }, + { + "displayTitle": "350.60 Grounding and Bonding", + "children": [ + { + "body": "LFMC shall be permitted to be used as an equipment grounding conductor when installed in accordance with 250.118(A)(6) where flexibility is not required after installation. [350.60_(A)](https://2023.antflix.net#350.60_(A))", + "displayTitle": "(A) Fixed Installation", + "children": [], + "url": "https://2023.antflix.net#350.60_(A)" + }, + { + "body": "An equipment grounding conductor shall be installed where flexibility is necessary to minimize the transmission of vibration from equipment or to provide flexibility for equipment that requires movement after installation. [350.60_(B)](https://2023.antflix.net#350.60_(B))", + "displayTitle": "(B) Flexible Installation", + "children": [], + "url": "https://2023.antflix.net#350.60_(B)" + }, + { + "body": "Where required or installed, equipment grounding conductors shall be installed in accordance with 250.134. [350.60_(C)](https://2023.antflix.net#350.60_(C))", + "displayTitle": "(C) Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#350.60_(C)" + }, + { + "body": "Where required or installed, equipment bonding jumpers shall be installed in accordance with 250.102. Informational Note: See 501.30(B)(2), 502.30(B)(2), 503.30(B)(2), 505.30(B)(2), and 506.30(B)(2) for types of equipment grounding conductors. [350.60_(D)](https://2023.antflix.net#350.60_(D))", + "displayTitle": "(D) Equipment Bonding Jumpers", + "children": [], + "url": "https://2023.antflix.net#350.60_(D)" + } + ], + "url": "https://2023.antflix.net#350.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_24_III" + }, + { + "body": "LFMC shall be marked according to 110.21. The trade size and other information required by the listing shall also be marked on the conduit. Conduit suitable for direct burial shall be so marked. [350.120](https://2023.antflix.net#350.120)", + "displayTitle": "350.120 Marking", + "children": [], + "url": "https://2023.antflix.net#350.120" + } + ], + "url": "https://2023.antflix.net#350" + }, + { + "displayTitle": "Article 352 Rigid Polyvinyl Chloride Conduit (PVC)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_28_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for rigid polyvinyl chloride conduit (PVC) and associated fittings. [352.1](https://2023.antflix.net#352.1)", + "displayTitle": "352.1 Scope", + "children": [], + "url": "https://2023.antflix.net#352.1" + }, + { + "body": "PVC conduit, factory elbows, and associated fittings shall be listed. [352.6](https://2023.antflix.net#352.6)", + "displayTitle": "352.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#352.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_28_II" + }, + { + "body": "The use of PVC conduit shall be permitted in accordance with 352.10(A) through (K). Informational Note: Extreme cold may cause some nonmetallic conduits to become brittle and, therefore, more susceptible to damage from physical contact. [352.10](https://2023.antflix.net#352.10)", + "displayTitle": "352.10 Uses Permitted", + "children": [ + { + "body": "PVC conduit shall be permitted in walls, floors, and ceilings. [352.10_(A)](https://2023.antflix.net#352.10_(A))", + "displayTitle": "(A) Concealed", + "children": [], + "url": "https://2023.antflix.net#352.10_(A)" + }, + { + "body": "PVC conduit shall be permitted to be encased in concrete. [352.10_(B)](https://2023.antflix.net#352.10_(B))", + "displayTitle": "(B) Encased in Concrete", + "children": [], + "url": "https://2023.antflix.net#352.10_(B)" + }, + { + "body": "PVC conduit shall be permitted in locations subject to severe corrosive influences as covered in 300.6 and where subject to chemicals for which the materials are specifically approved. [352.10_(C)](https://2023.antflix.net#352.10_(C))", + "displayTitle": "(C) Corrosive Influences", + "children": [], + "url": "https://2023.antflix.net#352.10_(C)" + }, + { + "body": "PVC conduit shall be permitted in cinder fill. [352.10_(D)](https://2023.antflix.net#352.10_(D))", + "displayTitle": "(D) Cinders", + "children": [], + "url": "https://2023.antflix.net#352.10_(D)" + }, + { + "body": "PVC conduit shall be permitted in portions of dairies, laundries, canneries, or other wet locations, and in locations where walls are frequently washed, the entire conduit system, including boxes and fittings used therewith, shall be installed and equipped so as to prevent water from entering the conduit. All supports, bolts, straps, screws, and so forth, shall be of corrosion-resistant materials or be protected against corrosion by approved corrosion-resistant materials. [352.10_(E)](https://2023.antflix.net#352.10_(E))", + "displayTitle": "(E) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#352.10_(E)" + }, + { + "body": "PVC conduit shall be permitted for use in dry and damp locations not prohibited by 352.12. [352.10_(F)](https://2023.antflix.net#352.10_(F))", + "displayTitle": "(F) Dry and Damp Locations", + "children": [], + "url": "https://2023.antflix.net#352.10_(F)" + }, + { + "body": "PVC conduit shall be permitted for exposed work. [352.10_(G)](https://2023.antflix.net#352.10_(G))", + "displayTitle": "(G) Exposed", + "children": [], + "url": "https://2023.antflix.net#352.10_(G)" + }, + { + "body": "For underground installations, PVC shall be permitted for direct burial and underground encased in concrete. See 300.5 and 305.15. [352.10_(H)](https://2023.antflix.net#352.10_(H))", + "displayTitle": "(H) Underground Installations", + "children": [], + "url": "https://2023.antflix.net#352.10_(H)" + }, + { + "body": "PVC conduit shall be permitted to support nonmetallic conduit bodies not larger than the largest trade size of an entering raceway. These conduit bodies shall not support luminaires or other equipment and shall not contain devices other than splicing devices as permitted by 110.14(B) and 314.16(C)(2). [352.10_(I)](https://2023.antflix.net#352.10_(I))", + "displayTitle": "(I) Support of Conduit Bodies", + "children": [], + "url": "https://2023.antflix.net#352.10_(I)" + }, + { + "body": "Conductors or cables rated at a temperature higher than the listed temperature rating of PVC conduit shall be permitted to be installed in PVC conduit, provided the conductors or cables are not operated at a temperature higher than the listed temperature rating of the PVC conduit. [352.10_(J)](https://2023.antflix.net#352.10_(J))", + "displayTitle": "(J) Insulation Temperature Limitations", + "children": [], + "url": "https://2023.antflix.net#352.10_(J)" + }, + { + "body": "Where subject to physical damage, Schedule 80 PVC conduit, Schedule 80 PVC elbows, and listed fittings for PVC conduit shall be used. Informational Note: All listed PVC conduit fittings are suitable for connection to both Schedule 40 and Schedule 80 PVC conduit. [352.10_(K)](https://2023.antflix.net#352.10_(K))", + "displayTitle": "(K) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#352.10_(K)" + } + ], + "url": "https://2023.antflix.net#352.10" + }, + { + "body": "PVC conduit shall not be used under the conditions specified in 352.12(A) through (E). [352.12](https://2023.antflix.net#352.12)", + "displayTitle": "352.12 Uses Not Permitted", + "children": [ + { + "body": "In any hazardous (classified) location, except as permitted by other articles of this Code. [352.12_(A)](https://2023.antflix.net#352.12_(A))", + "displayTitle": "(A) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#352.12_(A)" + }, + { + "body": "For the support of luminaires or other equipment not described in 352.10(1). [352.12_(B)](https://2023.antflix.net#352.12_(B))", + "displayTitle": "(B) Support of Luminaires", + "children": [], + "url": "https://2023.antflix.net#352.12_(B)" + }, + { + "body": "Where subject to physical damage, except as permitted in 352.10(K). [352.12_(C)](https://2023.antflix.net#352.12_(C))", + "displayTitle": "(C) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#352.12_(C)" + }, + { + "body": "Where subject to ambient temperatures in excess of 50\u00b0C (122\u00b0F) unless listed otherwise. [352.12_(D)](https://2023.antflix.net#352.12_(D))", + "displayTitle": "(D) Ambient Temperatures", + "children": [], + "url": "https://2023.antflix.net#352.12_(D)" + }, + { + "body": "In theaters and similar locations, except as provided in 518.4 and 520.5. [352.12_(E)](https://2023.antflix.net#352.12_(E))", + "displayTitle": "(E) Theaters and Similar Locations", + "children": [], + "url": "https://2023.antflix.net#352.12_(E)" + } + ], + "url": "https://2023.antflix.net#352.12" + }, + { + "displayTitle": "352.20 Size", + "children": [ + { + "body": "PVC conduit smaller than metric designator 16 (trade size 1/2) shall not be used. [352.20_(A)](https://2023.antflix.net#352.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#352.20_(A)" + }, + { + "body": "PVC conduit larger than metric designator 155 (trade size 6) shall not be used. Informational Note: See 300.1(C) for the trade sizes and metric designators that are for identification purposes only and do not relate to actual dimensions. [352.20_(B)](https://2023.antflix.net#352.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#352.20_(B)" + } + ], + "url": "https://2023.antflix.net#352.20" + }, + { + "body": "The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. [352.22](https://2023.antflix.net#352.22)", + "displayTitle": "352.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#352.22" + }, + { + "displayTitle": "352.24 Bends", + "children": [ + { + "body": "Bends shall be so made that the conduit will not be damaged and the internal diameter of the conduit will not be effectively reduced. Field bends shall be made only with identified bending equipment. The radius of the curve to the centerline of such bends shall not be less than shown in Table 2, Chapter 9. [352.24_(A)](https://2023.antflix.net#352.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#352.24_(A)" + }, + { + "body": "The total degrees of bends in a conduit run shall not exceed 360 degrees between pull points. [352.24_(B)](https://2023.antflix.net#352.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#352.24_(B)" + } + ], + "url": "https://2023.antflix.net#352.24" + }, + { + "body": "All cut ends shall be trimmed inside and outside to remove rough edges. [352.28](https://2023.antflix.net#352.28)", + "displayTitle": "352.28 Trimming", + "children": [], + "url": "https://2023.antflix.net#352.28" + }, + { + "body": "PVC conduit shall be installed as a complete system as provided in 300.18 and shall be fastened so that movement from thermal expansion or contraction is permitted. PVC conduit shall be securely fastened and supported in accordance with 352.30(A) and (B). [352.30](https://2023.antflix.net#352.30)", + "displayTitle": "352.30 Securing and Supporting", + "children": [ + { + "body": "PVC conduit shall be securely fastened within 900 mm (3 ft) of each outlet box, junction box, device box, conduit body, or other conduit termination. Conduit listed for securing at other than 900 mm (3 ft) shall be permitted to be installed in accordance with the listing. [352.30_(A)](https://2023.antflix.net#352.30_(A))", + "displayTitle": "(A) Securely Fastened", + "children": [], + "url": "https://2023.antflix.net#352.30_(A)" + }, + { + "body": "PVC conduit shall be supported as required in Table 352.30(B). Conduit listed for support at spacings other than as shown in Table 352.30(B) shall be permitted to be installed in accordance with the listing. Horizontal runs of PVC conduit supported by openings through framing members at intervals not exceeding those in Table 352.30(B) and securely fastened within 900 mm (3 ft) of termination points shall be permitted. Table 352.30(B) Support of Rigid Polyvinyl Chloride Conduit (PVC) Conduit Size Maximum Spacing Between Supports Metric Designator Trade Size mm or m ft 16\u201427 1/2\u20141 900 mm 3 35\u201453 11/4\u20142 1.5 m 5 63\u201478 21/2\u20143 1.8 m 6 91\u2014129 31/2\u20145 2.1 m 7 155 6 2.5 m 8 [352.30_(B)](https://2023.antflix.net#352.30_(B))", + "displayTitle": "(B) Supports", + "children": [], + "url": "https://2023.antflix.net#352.30_(B)" + } + ], + "url": "https://2023.antflix.net#352.30" + }, + { + "displayTitle": "352.44 Expansion Fittings", + "children": [ + { + "body": "Expansion fittings for PVC conduit shall be provided to compensate for thermal expansion and contraction where the length change, in accordance with Table 352.44(A), is expected to be 6 mm (1/4 in.) or greater in a straight run between securely mounted items such as boxes, cabinets, elbows, or other conduit terminations.Table 352.44(A) Expansion Characteristics of PVC Rigid Nonmetallic Conduit Coefficient of Thermal Expansion = 6.084 \u00d7 10\u20145 mm/mm/\u00b0C (3.38 \u00d7 10\u20145 in./in./\u00b0F) Temperature Change (\u00b0C) Length Change of PVC Conduit (mm/m) Temperature Change (\u00b0F) Length Change of PVC Conduit (in./100 ft) Temperature Change (\u00b0F) Length Change of PVC Conduit (in./100 ft) 5 0.30 5 0.20 105 4.26 10 0.61 10 0.41 110 4.46 15 0.91 15 0.61 115 4.66 20 1.22 20 0.81 120 4.87 25 1.52 25 1.01 125 5.07 30 1.83 30 1.22 130 5.27 35 2.13 35 1.42 135 5.48 40 2.43 40 1.62 140 5.68 45 2.74 45 1.83 145 5.88 50 3.04 50 2.03 150 6.08 55 3.35 55 2.23 155 6.29 60 3.65 60 2.43 160 6.49 65 3.95 65 2.64 165 6.69 70 4.26 70 2.84 170 6.90 75 4.56 75 3.04 175 7.10 80 4.87 80 3.24 180 7.30 85 5.17 85 3.45 185 7.50 90 5.48 90 3.65 190 7.71 95 5.78 95 3.85 195 7.91 100 6.08 100 4.06 200 8.1 1 [352.44_(A)](https://2023.antflix.net#352.44_(A))", + "displayTitle": "(A) Thermal Expansion and Contraction", + "children": [], + "url": "https://2023.antflix.net#352.44_(A)" + }, + { + "body": "Expansion fittings for underground runs of direct buried PVC conduit emerging from the ground shall be provided above grade when required to compensate for earth settling or movement, including frost heave. Informational Note: See 300.5(J). [352.44_(B)](https://2023.antflix.net#352.44_(B))", + "displayTitle": "(B) Earth Movement", + "children": [], + "url": "https://2023.antflix.net#352.44_(B)" + } + ], + "url": "https://2023.antflix.net#352.44" + }, + { + "body": "Where a conduit enters a box, fitting, or other enclosure, a bushing or adapter shall be provided to protect the wire from abrasion unless the box, fitting, or enclosure design provides equivalent protection. Informational Note: See 300.4(G) for the protection of conductors 4 AWG and larger at bushings. [352.46](https://2023.antflix.net#352.46)", + "displayTitle": "352.46 Bushings", + "children": [], + "url": "https://2023.antflix.net#352.46" + }, + { + "body": "All joints between lengths of conduit, and between conduit and couplings, fittings, and boxes, shall be made by an approved method. [352.48](https://2023.antflix.net#352.48)", + "displayTitle": "352.48 Joints", + "children": [], + "url": "https://2023.antflix.net#352.48" + }, + { + "body": "Splices and taps shall be made in accordance with 300.15. [352.56](https://2023.antflix.net#352.56)", + "displayTitle": "352.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#352.56" + }, + { + "body": "Where equipment grounding is required, separate grounding conductor shall be installed in the conduit.\nException No. 1: The equipment grounding conductor shall be permitted to be run separately from the circuit conductors as permitted in 250.134, Exception No. 2, for dc circuits and 250.134, Exception No. 1, for separately run equipment grounding conductors.\nException No. 2: The equipment grounding conductor shall not be required where the grounded conductor is used to ground equipment as permitted in 250.142. [352.60](https://2023.antflix.net#352.60)", + "displayTitle": "352.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#352.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_25_III" + }, + { + "body": "PVC conduit shall be made of rigid (nonplasticized) polyvinyl chloride (PVC). PVC conduit and fittings shall be composed of suitable nonmetallic material that is resistant to moisture and chemical atmospheres. For use aboveground, it shall also be flame retardant, resistant to impact and crushing, resistant to distortion from heat under conditions likely to be encountered in service, and resistant to low temperature and sunlight effects. For use underground, the material shall be acceptably resistant to moisture and corrosive agents and shall be of sufficient strength to withstand abuse, such as by impact and crushing, in handling and during installation. Where intended for direct burial, without encasement in concrete, the material shall also be capable of withstanding continued loading that is likely to be encountered after installation. [352.100](https://2023.antflix.net#352.100)", + "displayTitle": "352.100 Construction", + "children": [], + "url": "https://2023.antflix.net#352.100" + }, + { + "body": "Each length of PVC conduit shall be clearly and durably marked at least every 3 m (10 ft) as required in the first sentence of 110.21(A). The type of material shall also be included in the marking unless it is visually identifiable. For conduit recognized for use aboveground, these markings shall be permanent. For conduit limited to underground use only, these markings shall be sufficiently durable to remain legible until the material is installed. Conduit shall be permitted to be surface marked to indicate special characteristics of the material. Informational Note: Examples of these markings include but are not limited to \"limited smoke\" and \"sunlight resistant.\" [352.120](https://2023.antflix.net#352.120)", + "displayTitle": "352.120 Marking", + "children": [], + "url": "https://2023.antflix.net#352.120" + } + ], + "url": "https://2023.antflix.net#352" + }, + { + "displayTitle": "Article 353 High Density Polyethylene Conduit (HDPE Conduit)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_29_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for high density polyethylene (HDPE) conduit and associated fittings. [353.1](https://2023.antflix.net#353.1)", + "displayTitle": "353.1 Scope", + "children": [], + "url": "https://2023.antflix.net#353.1" + }, + { + "body": "HDPE conduit and associated fittings shall be listed. [353.6](https://2023.antflix.net#353.6)", + "displayTitle": "353.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#353.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_29_II" + }, + { + "body": "The use of HDPE conduit shall be permitted under the following conditions: In discrete lengths or in continuous lengths from a reelIn locations subject to severe corrosive influences as covered in 300.6 and where subject to chemicals for which the conduit is listedIn cinder fillIn direct burial installations in earth or concreteInformational Note to (4): See 300.5 and 305.15 for underground installations.Above ground, except as prohibited in 353.12, where encased in not less than 50 mm (2 in.) of concrete.Conductors or cables rated at a temperature higher than the listed temperature rating of HDPE conduit shall be permitted to be installed in HDPE conduit, provided the conductors or cables are not operated at a temperature higher than the listed temperature rating of the HDPE conduit. [353.10](https://2023.antflix.net#353.10)", + "displayTitle": "353.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#353.10" + }, + { + "body": "HDPE conduit shall not be used under the following conditions: Where exposedWithin a buildingIn any hazardous (classified) location, except as permitted by other articles in this CodeWhere subject to ambient temperatures in excess of 50\u00b0C (122\u00b0F) unless listed otherwise [353.12](https://2023.antflix.net#353.12)", + "displayTitle": "353.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#353.12" + }, + { + "displayTitle": "353.20 Size", + "children": [ + { + "body": "HDPE conduit smaller than metric designator 16 (trade size 1/2) shall not be used. [353.20_(A)](https://2023.antflix.net#353.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#353.20_(A)" + }, + { + "body": "HDPE conduit larger than metric designator 155 (trade size 6) shall not be used. Informational Note: See 300.1(C) for the trade sizes and metric designators that are for identification purposes only and do not relate to actual dimensions. [353.20_(B)](https://2023.antflix.net#353.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#353.20_(B)" + } + ], + "url": "https://2023.antflix.net#353.20" + }, + { + "body": "The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. [353.22](https://2023.antflix.net#353.22)", + "displayTitle": "353.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#353.22" + }, + { + "displayTitle": "353.24 Bends", + "children": [ + { + "body": "Bends shall be so made that the conduit will not be damaged and the internal diameter of the conduit will not be effectively reduced. Bends shall be permitted to be made manually without auxiliary equipment, and the radius of the curve to the centerline of such bends shall not be less than shown in Table 354.24(A). For conduits of metric designators 129 and 155 (trade sizes 5 and 6), the allowable radii of bends shall be in accordance with specifications provided by the manufacturer. [353.24_(A)](https://2023.antflix.net#353.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#353.24_(A)" + }, + { + "body": "The total degrees of bends in a conduit run shall not exceed 360 degrees between pull points. [353.24_(B)](https://2023.antflix.net#353.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#353.24_(B)" + } + ], + "url": "https://2023.antflix.net#353.24" + }, + { + "body": "All cut ends shall be trimmed inside and outside to remove rough edges. [353.28](https://2023.antflix.net#353.28)", + "displayTitle": "353.28 Trimming", + "children": [], + "url": "https://2023.antflix.net#353.28" + }, + { + "body": "Where a conduit enters a box, fitting, or other enclosure, a bushing or adapter shall be provided to protect the wire from abrasion unless the box, fitting, or enclosure design provides equivalent protection. Informational Note: See 300.4(G) for the protection of conductors 4 AWG and larger at bushings. [353.46](https://2023.antflix.net#353.46)", + "displayTitle": "353.46 Bushings", + "children": [], + "url": "https://2023.antflix.net#353.46" + }, + { + "body": "All joints between lengths of conduit and between conduit and couplings, fittings, and boxes shall be made by an approved method. Informational Note: HDPE conduit can be joined using either heat fusion, electrofusion, or mechanical fittings. [353.48](https://2023.antflix.net#353.48)", + "displayTitle": "353.48 Joints", + "children": [], + "url": "https://2023.antflix.net#353.48" + }, + { + "body": "Splices and taps shall be made in accordance with 300.15. [353.56](https://2023.antflix.net#353.56)", + "displayTitle": "353.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#353.56" + }, + { + "body": "Where equipment grounding is required, a separate grounding conductor shall be installed in the conduit. Exception No. 1: The equipment grounding conductor shall be permitted to be run separately from the conduit where used for grounding dc circuits as permitted in 250.134, Exception No. 2. Exception No. 2: The equipment grounding conductor shall not be required where the grounded conductor is used to ground equipment as permitted in 250.142. [353.60](https://2023.antflix.net#353.60)", + "displayTitle": "353.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#353.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_26_III" + }, + { + "body": "HDPE conduit shall be composed of high density polyethylene that is resistant to moisture and chemical atmospheres. The material shall be resistant to moisture and corrosive agents and shall be of sufficient strength to withstand abuse, such as by impact and crushing, in handling and during installation. Where intended for direct burial, without encasement in concrete, the material shall also be capable of withstanding continued loading that is likely to be encountered after installation. [353.100](https://2023.antflix.net#353.100)", + "displayTitle": "353.100 Construction", + "children": [], + "url": "https://2023.antflix.net#353.100" + }, + { + "body": "Each length of HDPE shall be clearly and durably marked at least every 3 m (10 ft) as required in 110.21. The type of material shall also be included in the marking. [353.120](https://2023.antflix.net#353.120)", + "displayTitle": "353.120 Marking", + "children": [], + "url": "https://2023.antflix.net#353.120" + } + ], + "url": "https://2023.antflix.net#353" + }, + { + "displayTitle": "Article 354 Nonmetallic Underground Conduit With Conductors (NUCC)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_30_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for nonmetallic underground conduit with conductors (NUCC). [354.1](https://2023.antflix.net#354.1)", + "displayTitle": "354.1 Scope", + "children": [], + "url": "https://2023.antflix.net#354.1" + }, + { + "body": "NUCC and associated fittings shall be listed. [354.6](https://2023.antflix.net#354.6)", + "displayTitle": "354.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#354.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_30_II" + }, + { + "body": "The use of NUCC and fittings shall be permitted in the following: For direct burial underground installation (For minimum cover requirements, see Table 300.5(A) and Table 305.15(A).)Encased or embedded in concreteIn cinder fillIn underground locations subject to severe corrosive influences as covered in 300.6 and where subject to chemicals for which the assembly is specifically approvedAbove ground, except as prohibited in 354.12, where encased in not less than 50 mm (2 in.) of concrete [354.10](https://2023.antflix.net#354.10)", + "displayTitle": "354.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#354.10" + }, + { + "body": "NUCC shall not be used in the following: In exposed locationsInside buildingsException: The conductor or the cable portion of the assembly, where suitable, shall be permitted to extend within the building for termination purposes in accordance with 300.3.In any hazardous (classified) location, except as permitted by other articles of this Code [354.12](https://2023.antflix.net#354.12)", + "displayTitle": "354.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#354.12" + }, + { + "displayTitle": "354.20 Size", + "children": [ + { + "body": "NUCC smaller than metric designator 16 (trade size 1/2) shall not be used. [354.20_(A)](https://2023.antflix.net#354.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#354.20_(A)" + }, + { + "body": "NUCC larger than metric designator 103 (trade size 4) shall not be used. Informational Note: See 300.1(C) for the metric designators and trade sizes. These are for identification purposes only and do not relate to actual dimensions. [354.20_(B)](https://2023.antflix.net#354.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#354.20_(B)" + } + ], + "url": "https://2023.antflix.net#354.20" + }, + { + "body": "The number of conductors or cables shall not exceed that permitted by the percentage fill in Table 1, Chapter 9. [354.22](https://2023.antflix.net#354.22)", + "displayTitle": "354.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#354.22" + }, + { + "displayTitle": "354.24 Bends", + "children": [ + { + "body": "Bends shall be manually made so that the conduit will not be damaged and the internal diameter of the conduit will not be effectively reduced. The radius of the curve of the centerline of such bends shall not be less than shown in Table 354.24(A).\nTable 354.24(A) Minimum Bending Radius for Nonmetallic Underground Conduit with Conductors (NUCC)\n\n\n\nConduit Size\nMinimum Bending Radius\n\n\nMetric Designator\nTrade Size\nmm\nft\n\n\n\n\n16\n1/2\n250\n10\n\n\n21\n3/4\n300\n12\n\n\n27\n1\n350\n14\n\n\n35\n11/4\n450\n18\n\n\n41\n11/2\n500\n20\n\n\n53\n2\n650\n26\n\n\n63\n21/2\n900\n36\n\n\n78\n3\n1200\n48\n\n\n103\n4\n1500\n60\n\n\n [354.24_(A)](https://2023.antflix.net#354.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#354.24_(A)" + }, + { + "body": "The total degrees of bends in a conduit run shall not exceed 360 degrees between pull points. [354.24_(B)](https://2023.antflix.net#354.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#354.24_(B)" + } + ], + "url": "https://2023.antflix.net#354.24" + }, + { + "body": "For termination, the conduit shall be trimmed away from the conductors or cables using an approved method that will not damage the conductor or cable insulation or jacket. All conduit ends shall be trimmed inside and out to remove rough edges. [354.28](https://2023.antflix.net#354.28)", + "displayTitle": "354.28 Trimming", + "children": [], + "url": "https://2023.antflix.net#354.28" + }, + { + "body": "Where the NUCC enters a box, fitting, or other enclosure, a bushing or adapter shall be provided to protect the conductor or cable from abrasion unless the design of the box, fitting, or enclosure provides equivalent protection. Informational Note: See 300.4(G) for the protection of conductors size 4 AWG or larger. [354.46](https://2023.antflix.net#354.46)", + "displayTitle": "354.46 Bushings", + "children": [], + "url": "https://2023.antflix.net#354.46" + }, + { + "body": "All joints between conduit, fittings, and boxes shall be made by an approved method. [354.48](https://2023.antflix.net#354.48)", + "displayTitle": "354.48 Joints", + "children": [], + "url": "https://2023.antflix.net#354.48" + }, + { + "body": "All terminations between the conductors or cables and equipment shall be made by an approved method for that type of conductor or cable. [354.50](https://2023.antflix.net#354.50)", + "displayTitle": "354.50 Conductor Terminations", + "children": [], + "url": "https://2023.antflix.net#354.50" + }, + { + "body": "Splices and taps shall be made in junction boxes or other enclosures. [354.56](https://2023.antflix.net#354.56)", + "displayTitle": "354.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#354.56" + }, + { + "body": "Where equipment grounding is required, an assembly containing a separate grounding conductor shall be used. Exception No. 1: The equipment grounding conductor shall be permitted to be run separately from the conduit where used for grounding dc circuits as permitted in 250.134, Exception No. 2. Exception No. 2: The equipment grounding conductor shall not be required where the grounded conductor is used to ground equipment as permitted in 250.142. [354.60](https://2023.antflix.net#354.60)", + "displayTitle": "354.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#354.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_27_III" + }, + { + "displayTitle": "354.100 Construction", + "children": [ + { + "body": "NUCC is an assembly that is provided in continuous lengths shipped in a coil, reel, or carton. [354.100_(A)](https://2023.antflix.net#354.100_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#354.100_(A)" + }, + { + "body": "The nonmetallic underground conduit shall be listed and composed of a material that is resistant to moisture and corrosive agents. It shall also be capable of being supplied on reels without damage or distortion and shall be of sufficient strength to withstand abuse, such as impact or crushing, in handling and during installation without damage to conduit or conductors. [354.100_(B)](https://2023.antflix.net#354.100_(B))", + "displayTitle": "(B) Nonmetallic Underground Conduit", + "children": [], + "url": "https://2023.antflix.net#354.100_(B)" + }, + { + "body": "Conductors and cables used in NUCC shall be listed and shall comply with 310.10(C). Conductors of different systems shall be installed in accordance with 300.3(C). [354.100_(C)](https://2023.antflix.net#354.100_(C))", + "displayTitle": "(C) Conductors and Cables", + "children": [], + "url": "https://2023.antflix.net#354.100_(C)" + }, + { + "body": "The maximum number of conductors or cables in NUCC shall not exceed that permitted by the percentage fill in Table 1, Chapter 9. [354.100_(D)](https://2023.antflix.net#354.100_(D))", + "displayTitle": "(D) Conductor Fill", + "children": [], + "url": "https://2023.antflix.net#354.100_(D)" + } + ], + "url": "https://2023.antflix.net#354.100" + }, + { + "body": "NUCC shall be clearly and durably marked at least every 3.05 m (10 ft) as required by 110.21. The type of conduit material shall also be included in the marking. Identification of conductors or cables used in the assembly shall be provided on a tag attached to each end of the assembly or to the side of a reel. Enclosed conductors or cables shall be marked in accordance with 310.8. [354.120](https://2023.antflix.net#354.120)", + "displayTitle": "354.120 Marking", + "children": [], + "url": "https://2023.antflix.net#354.120" + } + ], + "url": "https://2023.antflix.net#354" + }, + { + "displayTitle": "Article 355 Reinforced Thermosetting Resin Conduit (RTRC)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_31_I" + }, + { + "body": "This article covers the use, installation, and construction specification for reinforced thermosetting resin conduit (RTRC) and associated fittings. [355.1](https://2023.antflix.net#355.1)", + "displayTitle": "355.1 Scope", + "children": [], + "url": "https://2023.antflix.net#355.1" + }, + { + "body": "RTRC, factory elbows, and associated fittings shall be listed. [355.6](https://2023.antflix.net#355.6)", + "displayTitle": "355.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#355.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_31_II" + }, + { + "body": "The use of RTRC shall be permitted in accordance with 355.10(A) through (I). [355.10](https://2023.antflix.net#355.10)", + "displayTitle": "355.10 Uses Permitted", + "children": [ + { + "body": "RTRC shall be permitted in walls, floors, and ceilings. [355.10_(A)](https://2023.antflix.net#355.10_(A))", + "displayTitle": "(A) Concealed", + "children": [], + "url": "https://2023.antflix.net#355.10_(A)" + }, + { + "body": "RTRC shall be permitted in locations subject to severe corrosive influences as covered in 300.6 and where subject to chemicals for which the materials are specifically approved. [355.10_(B)](https://2023.antflix.net#355.10_(B))", + "displayTitle": "(B) Corrosive Influences", + "children": [], + "url": "https://2023.antflix.net#355.10_(B)" + }, + { + "body": "RTRC shall be permitted in cinder fill. [355.10_(C)](https://2023.antflix.net#355.10_(C))", + "displayTitle": "(C) Cinders", + "children": [], + "url": "https://2023.antflix.net#355.10_(C)" + }, + { + "body": "RTRC shall be permitted in portions of dairies, laundries, canneries, or other wet locations, and in locations where walls are frequently washed, the entire conduit system, including boxes and fittings used therewith, shall be installed and equipped so as to prevent water from entering the conduit. All supports, bolts, straps, screws, and so forth, shall be of corrosion-resistant materials or be protected against corrosion by approved corrosion-resistant materials. [355.10_(D)](https://2023.antflix.net#355.10_(D))", + "displayTitle": "(D) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#355.10_(D)" + }, + { + "body": "RTRC shall be permitted for use in dry and damp locations not prohibited by 355.12. [355.10_(E)](https://2023.antflix.net#355.10_(E))", + "displayTitle": "(E) Dry and Damp Locations", + "children": [], + "url": "https://2023.antflix.net#355.10_(E)" + }, + { + "body": "RTRC shall be permitted for exposed work if identified for such use. Informational Note: RTRC, Type XW, is identified for areas of physical damage. [355.10_(F)](https://2023.antflix.net#355.10_(F))", + "displayTitle": "(F) Exposed", + "children": [], + "url": "https://2023.antflix.net#355.10_(F)" + }, + { + "body": "For underground installations, see 300.5 and 305.15. [355.10_(G)](https://2023.antflix.net#355.10_(G))", + "displayTitle": "(G) Underground Installations", + "children": [], + "url": "https://2023.antflix.net#355.10_(G)" + }, + { + "body": "RTRC shall be permitted to support nonmetallic conduit bodies not larger than the largest trade size of an entering raceway. These conduit bodies shall not support luminaires or other equipment and shall not contain devices other than splicing devices as permitted by 110.14(B) and 314.16(C)(2). [355.10_(H)](https://2023.antflix.net#355.10_(H))", + "displayTitle": "(H) Support of Conduit Bodies", + "children": [], + "url": "https://2023.antflix.net#355.10_(H)" + }, + { + "body": "Conductors or cables rated at a temperature higher than the listed temperature rating of RTRC conduit shall be permitted to be installed in RTRC conduit, if the conductors or cables are not operated at a temperature higher than the listed temperature rating of the RTRC conduit. [355.10_(I)](https://2023.antflix.net#355.10_(I))", + "displayTitle": "(I) Insulation Temperature Limitations", + "children": [], + "url": "https://2023.antflix.net#355.10_(I)" + } + ], + "url": "https://2023.antflix.net#355.10" + }, + { + "body": "RTRC shall not be used under the following conditions. [355.12](https://2023.antflix.net#355.12)", + "displayTitle": "355.12 Uses Not Permitted", + "children": [ + { + "body": "In any hazardous (classified) location, except as permitted by other articles in this CodeIn Class I, Division 2 locations, except as permitted in 501.10(B)(1)(6) [355.12_(A)](https://2023.antflix.net#355.12_(A))", + "displayTitle": "(A) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#355.12_(A)" + }, + { + "body": "For the support of luminaires or other equipment not described in 355.10(H). [355.12_(B)](https://2023.antflix.net#355.12_(B))", + "displayTitle": "(B) Support of Luminaires", + "children": [], + "url": "https://2023.antflix.net#355.12_(B)" + }, + { + "body": "Where subject to physical damage unless identified for such use. [355.12_(C)](https://2023.antflix.net#355.12_(C))", + "displayTitle": "(C) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#355.12_(C)" + }, + { + "body": "Where subject to ambient temperatures in excess of 50\u00b0C (122\u00b0F) unless listed otherwise. [355.12_(D)](https://2023.antflix.net#355.12_(D))", + "displayTitle": "(D) Ambient Temperatures", + "children": [], + "url": "https://2023.antflix.net#355.12_(D)" + }, + { + "body": "In theaters and similar locations, except as provided in 518.4 and 520.5. [355.12_(E)](https://2023.antflix.net#355.12_(E))", + "displayTitle": "(E) Theaters and Similar Locations", + "children": [], + "url": "https://2023.antflix.net#355.12_(E)" + } + ], + "url": "https://2023.antflix.net#355.12" + }, + { + "displayTitle": "355.20 Size", + "children": [ + { + "body": "RTRC smaller than metric designator 16 (trade size 1/2) shall not be used. [355.20_(A)](https://2023.antflix.net#355.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#355.20_(A)" + }, + { + "body": "RTRC larger than metric designator 155 (trade size 6) shall not be used. Informational Note: See 300.1(C) for the trade sizes and metric designators that are for identification purposes only and do not relate to actual dimensions. [355.20_(B)](https://2023.antflix.net#355.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#355.20_(B)" + } + ], + "url": "https://2023.antflix.net#355.20" + }, + { + "body": "The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. [355.22](https://2023.antflix.net#355.22)", + "displayTitle": "355.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#355.22" + }, + { + "displayTitle": "355.24 Bends", + "children": [ + { + "body": "Bends shall be so made that the conduit will not be damaged and the internal diameter of the conduit will not be effectively reduced. Field bends shall be made only with identified bending equipment. The radius of the curve to the centerline of such bends shall not be less than shown in Table 2, Chapter 9. [355.24_(A)](https://2023.antflix.net#355.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#355.24_(A)" + }, + { + "body": "The total degrees of bends in a conduit run shall not exceed 360 degrees between pull points. [355.24_(B)](https://2023.antflix.net#355.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#355.24_(B)" + } + ], + "url": "https://2023.antflix.net#355.24" + }, + { + "body": "All cut ends shall be trimmed inside and outside to remove rough edges. [355.28](https://2023.antflix.net#355.28)", + "displayTitle": "355.28 Trimming", + "children": [], + "url": "https://2023.antflix.net#355.28" + }, + { + "body": "RTRC shall be installed as a complete system in accordance with 300.18 and shall be securely fastened in place and supported in accordance with 355.30(A) and (B). [355.30](https://2023.antflix.net#355.30)", + "displayTitle": "355.30 Securing and Supporting", + "children": [ + { + "body": "RTRC shall be securely fastened within 900 mm (3 ft) of each outlet box, junction box, device box, conduit body, or other conduit termination. Conduit listed for securing at other than 900 mm (3 ft) shall be permitted to be installed in accordance with the listing. [355.30_(A)](https://2023.antflix.net#355.30_(A))", + "displayTitle": "(A) Securely Fastened", + "children": [], + "url": "https://2023.antflix.net#355.30_(A)" + }, + { + "body": "RTRC shall be supported as required in Table 355.30(B). Conduit listed for support at spacing other than as shown in Table 355.30(B) shall be permitted to be installed in accordance with the listing. Horizontal runs of RTRC supported by openings through framing members at intervals not exceeding those in Table 355.30(B) and securely fastened within 900 mm (3 ft) of termination points shall be permitted. Table 355.30(B) Support of Reinforced Thermosetting Resin Conduit (RTRC) Conduit Size Maximum Spacing Between Supports Metric Designator Trade Size mm or m ft 16\u201427 1/2\u20141 900 mm 3 35-53 11/4\u20142 1.5 m 5 63-78 21/2\u20143 1.8 m 6 91-129 31/2\u20145 2.1 m 7 155 6 2.5 m 8 [355.30_(B)](https://2023.antflix.net#355.30_(B))", + "displayTitle": "(B) Supports", + "children": [], + "url": "https://2023.antflix.net#355.30_(B)" + } + ], + "url": "https://2023.antflix.net#355.30" + }, + { + "body": "Expansion fittings for RTRC shall be provided to compensate for thermal expansion and contraction where the length change, in accordance with Table 355.44, is expected to be 6 mm (1/4 in.) or greater in a straight run between securely mounted items such as boxes, cabinets, elbows, or other conduit terminations. Table 355.44 Expansion Characteristics of Reinforced Thermosetting Resin Conduit (RTRC) Coefficient of Thermal Expansion = 2.7 \u00d7 10-5 mm/mm/\u00b0C (1.5 \u00d7 10-5 in./in./\u00b0F) Temperature Change (\u00b0C) Length Change of RTRC Conduit (mm/m) Temperature Change (\u00b0F) Length Change of RTRC Conduit (in./100 ft) Temperature Change (\u00b0F) Length Change of RTRC Conduit (in./100 ft) 5 0.14 5 0.09 105 1.89 10 0.27 10 0.18 110 1.98 15 0.41 15 0.27 115 2.07 20 0.54 20 0.36 120 2.16 25 0.68 25 0.45 125 2.25 30 0.81 30 0.54 130 2.34 35 0.95 35 0.63 135 2.43 40 1.08 40 0.72 140 2.52 45 1.22 45 0.81 145 2.61 50 1.35 50 0.90 150 2.70 55 1.49 55 0.99 155 2.79 60 1.62 60 1.08 160 2.88 65 1.76 65 1.17 165 2.97 70 1.89 70 1.26 170 3.06 75 2.03 75 1.35 175 3.15 80 2.16 80 1.44 180 3.24 85 2.30 85 1.53 185 3.33 90 2.43 90 1.62 190 3.42 95 2.57 95 1.71 195 3.51 100 2.70 100 1.80 200 3.60 [355.44](https://2023.antflix.net#355.44)", + "displayTitle": "355.44 Expansion Fittings", + "children": [], + "url": "https://2023.antflix.net#355.44" + }, + { + "body": "Where a conduit enters a box, fitting, or other enclosure, a bushing or adapter shall be provided to protect the wire from abrasion unless the box, fitting, or enclosure design provides equivalent protection. Informational Note: See 300.4(G) for the protection of conductors 4 AWG and larger at bushings. [355.46](https://2023.antflix.net#355.46)", + "displayTitle": "355.46 Bushings", + "children": [], + "url": "https://2023.antflix.net#355.46" + }, + { + "body": "All joints between lengths of conduit, and between conduit and couplings, fitting, and boxes, shall be made by an approved method. [355.48](https://2023.antflix.net#355.48)", + "displayTitle": "355.48 Joints", + "children": [], + "url": "https://2023.antflix.net#355.48" + }, + { + "body": "Splices and taps shall be made in accordance with 300.15. [355.56](https://2023.antflix.net#355.56)", + "displayTitle": "355.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#355.56" + }, + { + "body": "Where equipment grounding is required, a separate grounding conductor shall be installed in the conduit. Exception No. 1: The equipment grounding conductor shall be permitted to be run separately from the circuit conductors as permitted in 250.134, Exception No. 2, for dc circuits and 250.134, Exception No. 1, for separately run equipment grounding conductors. Exception No. 2: An equipment grounding conductor shall not be required where the grounded conductor is used to ground equipment as in 250.142(A). [355.60](https://2023.antflix.net#355.60)", + "displayTitle": "355.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#355.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_28_III" + }, + { + "body": "RTRC and fittings shall be composed of suitable nonmetallic material that is resistant to moisture and chemical atmospheres. For use aboveground, it shall also be flame retardant, resistant to impact and crushing, resistant to distortion from heat under conditions likely to be encountered in service, and resistant to low temperature and sunlight effects. For use underground, the material shall be acceptably resistant to moisture and corrosive agents and shall be of sufficient strength to withstand abuse, such as by impact and crushing, in handling and during installation. Where intended for direct burial, without encasement in concrete, the material shall also be capable of withstanding continued loading that is likely to be encountered after installation. [355.100](https://2023.antflix.net#355.100)", + "displayTitle": "355.100 Construction", + "children": [], + "url": "https://2023.antflix.net#355.100" + }, + { + "body": "Each length of RTRC shall be clearly and durably marked at least every 3 m (10 ft) as required in the first sentence of 110.21(A). The type of material shall also be included in the marking unless it is visually identifiable. For conduit recognized for use aboveground, these markings shall be permanent. For conduit limited to underground use only, these markings shall be sufficiently durable to remain legible until the material is installed. Conduit shall be permitted to be surface marked to indicate special characteristics of the material. Informational Note: Examples of these markings include but are not limited to \"limited smoke\" and \"sunlight resistant.\" [355.120](https://2023.antflix.net#355.120)", + "displayTitle": "355.120 Marking", + "children": [], + "url": "https://2023.antflix.net#355.120" + } + ], + "url": "https://2023.antflix.net#355" + }, + { + "displayTitle": "Article 356 Liquidtight Flexible Nonmetallic Conduit (LFNC)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_32_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for liquidtight flexible nonmetallic conduit (LFNC) and associated fittings. [356.1](https://2023.antflix.net#356.1)", + "displayTitle": "356.1 Scope", + "children": [], + "url": "https://2023.antflix.net#356.1" + }, + { + "body": "LFNC and associated fittings shall be listed. [356.6](https://2023.antflix.net#356.6)", + "displayTitle": "356.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#356.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_32_II" + }, + { + "body": "LFNC shall be permitted to be used in exposed or concealed locations for the following purposes: Where flexibility is required for installation, operation, or maintenance.Where protection of the contained conductors is required from vapors, machine oils, liquids, or solids.For outdoor locations where listed and marked as suitable for the purpose.For direct burial where listed and marked for the purpose.Installed in lengths longer than 1.8 m (6 ft) where secured in accordance with 356.30.LFNC-B as a listed manufactured prewired assembly, metric designator 16 through 27 (trade size 1/2 through 1) conduit.For encasement in concrete where listed for direct burial and installed in compliance with 356.42.In locations subject to severe corrosive influences as covered in 300.6 and where subject to chemicals for which the materials are specifically approved.Conductors or cables rated at a temperature higher than the listed temperature rating of LFNC shall be permitted to be installed in LFNC, provided the conductors or cables are not operated at a temperature higher than the listed temperature rating of the LFNC.Informational Note: Extreme cold can cause some types of nonmetallic conduits to become brittle and therefore more susceptible to damage from physical contact. [356.10](https://2023.antflix.net#356.10)", + "displayTitle": "356.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#356.10" + }, + { + "body": "LFNC shall not be used as follows: Where subject to physical damageWhere any combination of ambient and conductor temperatures is in excess of that for which it is listedIn lengths longer than 1.8 m (6 ft), except as permitted by 356.10(5) or where a longer length is approved as essential for a required degree of flexibilityIn any hazardous (classified) location, except as permitted by other articles in this Code [356.12](https://2023.antflix.net#356.12)", + "displayTitle": "356.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#356.12" + }, + { + "displayTitle": "356.20 Size", + "children": [ + { + "body": "LFNC smaller than metric designator 16 (trade size 1/2) shall not be used unless permitted for metric designator 12 (trade size 3/8) as follows: For enclosing the leads of motors as permitted in 430.245(B)In lengths not exceeding 1.8 m (6 ft) as part of a listed assembly for tap connections to luminaires as required in 410.117(C), or for utilization equipment [356.20_(A)](https://2023.antflix.net#356.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#356.20_(A)" + }, + { + "body": "LFNC larger than metric designator 103 (trade size 4) shall not be used. Informational Note: See 300.1(C) for the metric designators and trade sizes. These are for identification purposes only and do not relate to actual dimensions. [356.20_(B)](https://2023.antflix.net#356.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#356.20_(B)" + } + ], + "url": "https://2023.antflix.net#356.20" + }, + { + "body": "The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. [356.22](https://2023.antflix.net#356.22)", + "displayTitle": "356.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#356.22" + }, + { + "displayTitle": "356.24 Bends", + "children": [ + { + "body": "Bends in conduit shall be so made that the conduit is not damaged and the internal diameter of the conduit is not effectively reduced. Bends shall be permitted to be made manually without auxiliary equipment. The radius of the curve to the centerline of any bend shall not be less than shown in Table 2, Chapter 9 using the column \"Other Bends.\" [356.24_(A)](https://2023.antflix.net#356.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#356.24_(A)" + }, + { + "body": "The total degrees of bends in a conduit run shall not exceed 360 degrees between pull points. [356.24_(B)](https://2023.antflix.net#356.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#356.24_(B)" + } + ], + "url": "https://2023.antflix.net#356.24" + }, + { + "body": "All cut ends of conduit shall be trimmed inside and outside to remove rough edges. [356.28](https://2023.antflix.net#356.28)", + "displayTitle": "356.28 Trimming", + "children": [], + "url": "https://2023.antflix.net#356.28" + }, + { + "body": "LFNC shall be securely fastened and supported in accordance with one of the following: Where installed in lengths exceeding 1.8 m (6 ft), the conduit shall be securely fastened at intervals not exceeding 900 mm (3 ft) and within 300 mm (12 in.) on each side of every outlet box, junction box, cabinet, or fitting. Where used, cable ties shall be listed for the application and for securing and supporting.Securing or supporting of the conduit shall not be required where it is fished, installed in lengths not exceeding 900 mm (3 ft) at terminals where flexibility is required, or installed in lengths not exceeding 1.8 m (6 ft) from a luminaire terminal connection for tap conductors to luminaires permitted in 410.117(C).Horizontal runs of LFNC supported by openings through framing members at intervals not exceeding 900 mm (3 ft) and securely fastened within 300 mm (12 in.) of termination points shall be permitted.Securing or supporting of LFNC shall not be required where installed in lengths not exceeding 1.8 m (6 ft) from the last point where the raceway is securely fastened for connections within an accessible ceiling to a luminaire(s) or other equipment. For the purpose of 356.30, listed liquidtight flexible nonmetallic conduit fittings shall be permitted as a means of support. [356.30](https://2023.antflix.net#356.30)", + "displayTitle": "356.30 Securing and Supporting", + "children": [], + "url": "https://2023.antflix.net#356.30" + }, + { + "body": "Only fittings listed for use with LFNC shall be used. Angle connectors shall not be used for concealed raceway installations. Straight LFNC fittings are permitted for direct burial or encasement in concrete. [356.42](https://2023.antflix.net#356.42)", + "displayTitle": "356.42 Couplings and Connectors", + "children": [], + "url": "https://2023.antflix.net#356.42" + }, + { + "body": "Splices and taps shall be made in accordance with 300.15. [356.56](https://2023.antflix.net#356.56)", + "displayTitle": "356.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#356.56" + }, + { + "body": "Where equipment grounding is required, a separate grounding conductor shall be installed in the conduit. Exception No. 1: The equipment grounding conductor shall be permitted to be run separately from the circuit conductors as permitted in 250.134, Exception No. 2, for dc circuits and 250.134, Exception No. 1, for separately run equipment grounding conductors. Exception No. 2: The equipment grounding conductor shall not be required where the grounded conductor is used to ground equipment as permitted in 250.142. [356.60](https://2023.antflix.net#356.60)", + "displayTitle": "356.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#356.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_29_III" + }, + { + "body": "LFNC-B as a prewired manufactured assembly shall be provided in continuous lengths capable of being shipped in a coil, reel, or carton without damage. [356.100](https://2023.antflix.net#356.100)", + "displayTitle": "356.100 Construction", + "children": [], + "url": "https://2023.antflix.net#356.100" + }, + { + "body": "LFNC shall be marked at least every 600 mm (2 ft) in accordance with 110.21. The marking shall include a type designation in accordance with the definition of Conduit, Liquidtight Flexible Nonmetallic (LFNC) in Article 100 and the trade size. Conduit that is intended for outdoor use or direct burial shall be marked. The type, size, and quantity of conductors used in prewired manufactured assemblies shall be identified by means of a printed tag or label attached to each end of the manufactured assembly and either the carton, coil, or reel. The enclosed conductors shall be marked in accordance with 310.8. [356.120](https://2023.antflix.net#356.120)", + "displayTitle": "356.120 Marking", + "children": [], + "url": "https://2023.antflix.net#356.120" + } + ], + "url": "https://2023.antflix.net#356" + }, + { + "displayTitle": "Article 358 Electrical Metallic Tubing (EMT)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_33_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for electrical metallic tubing (EMT) and associated fittings. [358.1](https://2023.antflix.net#358.1)", + "displayTitle": "358.1 Scope", + "children": [], + "url": "https://2023.antflix.net#358.1" + }, + { + "body": "EMT, factory elbows, and associated fittings shall be listed. [358.6](https://2023.antflix.net#358.6)", + "displayTitle": "358.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#358.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_33_II" + }, + { + "displayTitle": "358.10 Uses Permitted", + "children": [ + { + "body": "The use of EMT shall be permitted for both exposed and concealed work for the following: In concrete, in direct contact with the earth, in direct burial applications with fittings identified for direct burial, or in areas subject to severe corrosive influences where installed in accordance with 358.10(B)In dry, damp, and wet locationsIn any hazardous (classified) location as permitted by other articles in this CodeFor manufactured wiring systems as permitted in 604.100(A)(2) [358.10_(A)](https://2023.antflix.net#358.10_(A))", + "displayTitle": "(A) Exposed and Concealed", + "children": [], + "url": "https://2023.antflix.net#358.10_(A)" + }, + { + "displayTitle": "(B) Corrosive Environments", + "children": [ + { + "body": "Galvanized steel and stainless steel EMT, elbows, and fittings shall be permitted to be installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influences where protected by corrosion protection and approved as suitable for the condition. [358.10_(B)_(1)](https://2023.antflix.net#358.10_(B)_(1))", + "displayTitle": "(1) Galvanized Steel and Stainless Steel EMT, Elbows, and Fittings", + "children": [], + "url": "https://2023.antflix.net#358.10_(B)_(1)" + }, + { + "body": "Aluminum EMT shall be provided with approved supplementary corrosion protection where encased in concrete or in direct contact with the earth. [358.10_(B)_(2)](https://2023.antflix.net#358.10_(B)_(2))", + "displayTitle": "(2) Supplementary Protection of Aluminum EMT", + "children": [], + "url": "https://2023.antflix.net#358.10_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#358.10_(B)" + }, + { + "body": "Galvanized steel and stainless steel EMT shall be permitted to be installed in cinder concrete or cinder fill where subject to permanent moisture when protected on all sides by a layer of noncinder concrete at least 50 mm (2 in.) thick or when the tubing is installed at least 450 mm (18 in.) under the fill. [358.10_(C)](https://2023.antflix.net#358.10_(C))", + "displayTitle": "(C) Cinder Fill", + "children": [], + "url": "https://2023.antflix.net#358.10_(C)" + }, + { + "body": "All supports, bolts, straps, screws, and so forth shall be of corrosion-resistant materials or protected against corrosion by corrosion-resistant materials. Informational Note: See 300.6 for protection against corrosion. [358.10_(D)](https://2023.antflix.net#358.10_(D))", + "displayTitle": "(D) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#358.10_(D)" + }, + { + "body": "Steel and stainless steel EMT shall be permitted to be installed where subject to physical damage. [358.10_(E)](https://2023.antflix.net#358.10_(E))", + "displayTitle": "(E) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#358.10_(E)" + } + ], + "url": "https://2023.antflix.net#358.10" + }, + { + "body": "EMT shall not be used under the following conditions: Where subject to severe physical damageFor the support of luminaires or other equipment except conduit bodies no larger than the largest trade size of the tubing [358.12](https://2023.antflix.net#358.12)", + "displayTitle": "358.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#358.12" + }, + { + "body": "Where practicable, dissimilar metals in contact anywhere in the system shall be avoided to eliminate the possibility of galvanic action. Stainless steel and aluminum fittings and enclosures shall be permitted to be used with galvanized steel EMT, and galvanized steel fittings and enclosures shall be permitted to be used with aluminum EMT where not subject to severe corrosive influences. Stainless steel EMT shall only be used with the following:Stainless steel fittingsStainless steel boxes and enclosuresSteel (galvanized, painted, powder or PVC coated, and so forth) boxes and enclosures when not subject to severe corrosive influencesStainless steel, nonmetallic, or approved accessories [358.14](https://2023.antflix.net#358.14)", + "displayTitle": "358.14 Dissimilar Metals", + "children": [], + "url": "https://2023.antflix.net#358.14" + }, + { + "displayTitle": "358.20 Size", + "children": [ + { + "body": "EMT smaller than metric designator 16 (trade size 1/2) shall not be used. Exception: Metric designator 12 (trade size 3/8) shall be permitted for enclosing the leads of motors as permitted in 430.245(B). [358.20_(A)](https://2023.antflix.net#358.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#358.20_(A)" + }, + { + "body": "The maximum size of EMT shall be metric designator 155 (trade size 6). Informational Note: See 300.1(C) for the metric designators and trade sizes. These are for identification purposes only and do not relate to actual dimensions. [358.20_(B)](https://2023.antflix.net#358.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#358.20_(B)" + } + ], + "url": "https://2023.antflix.net#358.20" + }, + { + "body": "The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. [358.22](https://2023.antflix.net#358.22)", + "displayTitle": "358.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#358.22" + }, + { + "displayTitle": "358.24 Bends", + "children": [ + { + "body": "Bends shall be made so that the tubing is not damaged and the internal diameter of the tubing is not effectively reduced. The radius of the curve of any field bend to the centerline of the tubing shall not be less than shown in Table 2, Chapter 9 for one-shot and full shoe benders. [358.24_(A)](https://2023.antflix.net#358.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#358.24_(A)" + }, + { + "body": "The total degrees of bends in a tubing run shall not exceed 360 degrees between pull points. [358.24_(B)](https://2023.antflix.net#358.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#358.24_(B)" + } + ], + "url": "https://2023.antflix.net#358.24" + }, + { + "displayTitle": "358.28 Reaming and Threading", + "children": [ + { + "body": "All cut ends of EMT shall be reamed or otherwise finished to remove rough edges. [358.28_(A)](https://2023.antflix.net#358.28_(A))", + "displayTitle": "(A) Reaming", + "children": [], + "url": "https://2023.antflix.net#358.28_(A)" + }, + { + "body": "EMT shall not be threaded. Exception: EMT with factory threaded integral couplings complying with 358.100 shall be permitted. [358.28_(B)](https://2023.antflix.net#358.28_(B))", + "displayTitle": "(B) Threading", + "children": [], + "url": "https://2023.antflix.net#358.28_(B)" + } + ], + "url": "https://2023.antflix.net#358.28" + }, + { + "body": "EMT shall be installed as a complete system in accordance with 300.18 and shall be securely fastened in place and supported in accordance with 358.30(A) and (B). [358.30](https://2023.antflix.net#358.30)", + "displayTitle": "358.30 Securing and Supporting", + "children": [ + { + "body": "EMT shall be securely fastened in place in accordance with the following: At intervals not to exceed 3 m (10 ft)Within 900 mm (3 ft) of each outlet box, junction box, device box, cabinet, conduit body, or other tubing terminationException No. 1: Fastening of unbroken lengths shall be permitted to be increased to a distance of 1.5 m (5 ft) where structural members do not readily permit fastening within 900 mm (3 ft).Exception No. 2: For concealed work in finished buildings or prefinished wall panels where such securing is impracticable, unbroken lengths (without coupling) of EMT shall be permitted to be fished. [358.30_(A)](https://2023.antflix.net#358.30_(A))", + "displayTitle": "(A) Securely Fastened", + "children": [], + "url": "https://2023.antflix.net#358.30_(A)" + }, + { + "body": "Horizontal runs of EMT supported by openings through framing members at intervals not greater than 3 m (10 ft) and securely fastened within 900 mm (3 ft) of termination points shall be permitted. [358.30_(B)](https://2023.antflix.net#358.30_(B))", + "displayTitle": "(B) Supports", + "children": [], + "url": "https://2023.antflix.net#358.30_(B)" + } + ], + "url": "https://2023.antflix.net#358.30" + }, + { + "body": "Couplings and connectors used with EMT shall be made up tight. Where buried in masonry or concrete, they shall be concretetight type. Where installed in wet locations, they shall comply with 314.15. [358.42](https://2023.antflix.net#358.42)", + "displayTitle": "358.42 Couplings and Connectors", + "children": [], + "url": "https://2023.antflix.net#358.42" + }, + { + "body": "Splices and taps shall be made in accordance with 300.15. [358.56](https://2023.antflix.net#358.56)", + "displayTitle": "358.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#358.56" + }, + { + "body": "EMT shall be permitted as an equipment grounding conductor. [358.60](https://2023.antflix.net#358.60)", + "displayTitle": "358.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#358.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_30_III" + }, + { + "body": "EMT shall be made of one of the following: Steel with protective coatingsAluminumStainless steel [358.100](https://2023.antflix.net#358.100)", + "displayTitle": "358.100 Construction", + "children": [], + "url": "https://2023.antflix.net#358.100" + }, + { + "body": "EMT shall be clearly and durably marked at least every 3 m (10 ft) as required in the first sentence of 110.21 (A). [358.120](https://2023.antflix.net#358.120)", + "displayTitle": "358.120 Marking", + "children": [], + "url": "https://2023.antflix.net#358.120" + } + ], + "url": "https://2023.antflix.net#358" + }, + { + "displayTitle": "Article 360 Flexible Metallic Tubing (FMT)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_34_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for flexible metallic tubing (FMT) and associated fittings. [360.1](https://2023.antflix.net#360.1)", + "displayTitle": "360.1 Scope", + "children": [], + "url": "https://2023.antflix.net#360.1" + }, + { + "body": "FMT and associated fittings shall be listed. [360.6](https://2023.antflix.net#360.6)", + "displayTitle": "360.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#360.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_34_II" + }, + { + "body": "FMT shall be permitted to be used for branch circuits as follows: In dry locationsWhere concealedIn accessible locationsFor system voltages of 1000 volts maximum [360.10](https://2023.antflix.net#360.10)", + "displayTitle": "360.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#360.10" + }, + { + "body": "FMT shall not be used as follows: In hoistwaysIn storage battery roomsIn hazardous (classified) locations unless otherwise permitted under other articles in this CodeUnderground for direct earth burial, or embedded in poured concrete or aggregateWhere subject to physical damageIn lengths over 1.8 m (6 ft) [360.12](https://2023.antflix.net#360.12)", + "displayTitle": "360.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#360.12" + }, + { + "displayTitle": "360.20 Size", + "children": [ + { + "body": "FMT smaller than metric designator 16 (trade size 1/2) shall not be used. Exception No. 1: FMT of metric designator 12 (trade size 3/8) shall be permitted to be installed in accordance with 300.22(B) and (C). Exception No. 2: FMT of metric designator 12 (trade size 3/8) shall be permitted in lengths not in excess of 1.8 m (6 ft) as part of a listed assembly or for luminaires. See 410.117(C). [360.20_(A)](https://2023.antflix.net#360.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#360.20_(A)" + }, + { + "body": "The maximum size of FMT shall be metric designator 21 (trade size 3/4). Informational Note: See 300.1(C) for the metric designators and trade sizes. These are for identification purposes only and do not relate to actual dimensions. [360.20_(B)](https://2023.antflix.net#360.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#360.20_(B)" + } + ], + "url": "https://2023.antflix.net#360.20" + }, + { + "displayTitle": "360.22 Number of Conductors", + "children": [ + { + "body": "The number of conductors in metric designators 16 (trade size 1/2) and 21 (trade size 3/4) shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. [360.22_(A)](https://2023.antflix.net#360.22_(A))", + "displayTitle": "(A) FMT - Metric Designators 16 and 21 (Trade Sizes 1/2 and 3/4)", + "children": [], + "url": "https://2023.antflix.net#360.22_(A)" + }, + { + "body": "The number of conductors in metric designator 12 (trade size 3/8) shall not exceed that permitted in Table 348.22. [360.22_(B)](https://2023.antflix.net#360.22_(B))", + "displayTitle": "(B) FMT - Metric Designator 12 (Trade Size 3/8)", + "children": [], + "url": "https://2023.antflix.net#360.22_(B)" + } + ], + "url": "https://2023.antflix.net#360.22" + }, + { + "displayTitle": "360.24 Bends", + "children": [ + { + "body": "When FMT is infrequently flexed in service after installation, the radii of bends measured to the inside of the bend shall not be less than specified in Table 360.24(A).Table 360.24(A) Minimum Radii for Flexing Use\n\n\n\nMetric Designator\nTrade Size\nMinimum Radii for Flexing Use\n\n\nmm\nin.\n\n\n\n\n12\n3/8\n254.0\n10\n\n\n16\n1/2\n317.5\n121/2\n\n\n21\n3/4\n444.5\n171/2\n\n\n [360.24_(A)](https://2023.antflix.net#360.24_(A))", + "displayTitle": "(A) Infrequent Flexing Use", + "children": [], + "url": "https://2023.antflix.net#360.24_(A)" + }, + { + "body": "Where FMT is bent for installation purposes and is not flexed or bent as required by use after installation, the radii of bends measured to the inside of the bend shall not be less than specified in Table 360.24(B). \nTable 360.24(B) Minimum Radii for Fixed Bends\n\n\n\nMetric Designator\nTrade Size\nMinimum Radii for Flexing Use\n\n\nmm\nin.\n\n\n\n\n12\n3/8\n88.9\n31/2\n\n\n16\n1/2\n101.6\n4\n\n\n21\n3/4\n127.0\n5\n\n\n [360.24_(B)](https://2023.antflix.net#360.24_(B))", + "displayTitle": "(B) Fixed Bends", + "children": [], + "url": "https://2023.antflix.net#360.24_(B)" + } + ], + "url": "https://2023.antflix.net#360.24" + }, + { + "body": "Splices and taps shall be made in accordance with 300.15. [360.56](https://2023.antflix.net#360.56)", + "displayTitle": "360.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#360.56" + }, + { + "body": "FMT shall be permitted as an equipment grounding conductor where installed in accordance with 250.118(A)(7). [360.60](https://2023.antflix.net#360.60)", + "displayTitle": "360.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#360.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_31_III" + }, + { + "body": "FMT shall be marked according to 110.21. [360.120](https://2023.antflix.net#360.120)", + "displayTitle": "360.120 Marking", + "children": [], + "url": "https://2023.antflix.net#360.120" + } + ], + "url": "https://2023.antflix.net#360" + }, + { + "displayTitle": "Article 362 Electrical Nonmetallic Tubing (ENT)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_35_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for electrical nonmetallic tubing (ENT) and associated fittings. [362.1](https://2023.antflix.net#362.1)", + "displayTitle": "362.1 Scope", + "children": [], + "url": "https://2023.antflix.net#362.1" + }, + { + "body": "ENT shall not be reconditioned. [362.2](https://2023.antflix.net#362.2)", + "displayTitle": "362.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#362.2" + }, + { + "body": "ENT and associated fittings shall be listed. [362.6](https://2023.antflix.net#362.6)", + "displayTitle": "362.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#362.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_35_II" + }, + { + "body": "For the purpose of this article, the first floor of a building shall be that floor that has 50 percent or more of the exterior wall surface area level with or above finished grade. One additional level that is the first level and not designed for human habitation and used only for vehicle parking, storage, or similar use shall be permitted. The use of ENT and fittings shall be permitted in the following: In any building not exceeding three floors above grade as follows:For exposed work, where not prohibited by 362.12Concealed within walls, floors, and ceilingsIn any building exceeding three floors above grade concealed within combustible or noncombustible walls, floors, and ceilings where the walls, floors, and ceilings provide a thermal barrier of material that has at least a 15-minute finish rating as identified in listings of fire-rated assemblies.Exception to (2): Where an approved automatic fire protective system(s) is installed on all floors, ENT shall be permitted to be used within walls, floors, and ceilings, exposed or concealed, in buildings exceeding three floors above grade.Informational Note No. 1: A finish rating is established for assemblies containing combustible (wood) supports. The finish rating is defined as the time at which the wood stud or wood joist reaches an average temperature rise of 121\u00b0C (250\u00b0F) or an individual temperature of 163\u00b0C (325\u00b0F) as measured on the plane of the wood nearest the fire. A finish rating is not intended to represent a rating for a membrane ceiling.Informational Note No. 2: See NFPA 13-2022, Standard for the Installation of Sprinkler Systems, a recognized fire sprinkler system(s) standard.In locations subject to severe corrosive influences as covered in 300.6 and where subject to chemicals for which the materials are specifically approved.In concealed, dry, and damp locations not prohibited by 362.12.Above suspended ceilings where the suspended ceilings provide a thermal barrier of material that has at least a 15-minute finish rating as identified in listings of fire-rated assemblies, except as permitted in 362.10(1)a.Exception to (5): ENT shall be permitted to be used above suspended ceilings in buildings exceeding three floors above grade where the building is protected throughout by an approved automatic fire protective system.Informational Note No. 3: See NFPA 13-2022, Standard for the Installation of Sprinkler Systems, a recognized fire sprinkler system(s) standard.Encased in poured concrete floors, ceilings, walls, and slabs.Embedded in a concrete slab on grade where ENT is placed on sand or approved screenings, provided fittings identified for this purpose are used for connections.For wet locations as permitted in this section or in a concrete slab on or belowgrade, with fittings listed for the purpose.Metric designator 16 through 27 (trade size 1/2 through 1) as listed manufactured prewired assembly.With conductors or cables rated at a temperature higher than the listed temperature rating of ENT if the conductors or cables are not operated at a temperature higher than the listed temperature rating of the ENT. [362.10](https://2023.antflix.net#362.10)", + "displayTitle": "362.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#362.10" + }, + { + "body": "ENT shall not be used in the following: In any hazardous (classified) location, except as permitted by other articles in this CodeFor the support of luminaires and other equipmentWhere subject to ambient temperatures in excess of 50\u00b0C (122\u00b0F) unless listed otherwiseFor direct earth burialIn exposed locations, except as permitted by 362.10(1), 362.10(5), and 362.10(8)In theaters and similar locations, except as provided in 518.4 and 520.5Where exposed to the direct rays of the sun, unless identified as sunlight resistantWhere subject to physical damageInformational Note: Extreme cold may cause some types of nonmetallic conduits to become brittle and therefore more susceptible to damage from physical contact. [362.12](https://2023.antflix.net#362.12)", + "displayTitle": "362.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#362.12" + }, + { + "displayTitle": "362.20 Size", + "children": [ + { + "body": "ENT smaller than metric designator 16 (trade size 1/2) shall not be used. [362.20_(A)](https://2023.antflix.net#362.20_(A))", + "displayTitle": "(A) Minimum", + "children": [], + "url": "https://2023.antflix.net#362.20_(A)" + }, + { + "body": "ENT larger than metric designator 63 (trade size 21/2) shall not be used. Informational Note: See 300.1(C) for the metric designators and trade sizes. These are for identification purposes only and do not relate to actual dimensions. [362.20_(B)](https://2023.antflix.net#362.20_(B))", + "displayTitle": "(B) Maximum", + "children": [], + "url": "https://2023.antflix.net#362.20_(B)" + } + ], + "url": "https://2023.antflix.net#362.20" + }, + { + "body": "The number of conductors shall not exceed that permitted by the percentage fill in Table 1, Chapter 9. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9. [362.22](https://2023.antflix.net#362.22)", + "displayTitle": "362.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#362.22" + }, + { + "displayTitle": "362.24 Bends", + "children": [ + { + "body": "Bends shall be so made that the tubing will not be damaged and the internal diameter of the tubing will not be effectively reduced. Bends shall be permitted to be made manually without auxiliary equipment, and the radius of the curve to the centerline of such bends shall not be less than shown in Table 2, Chapter 9 using the column \"Other Bends.\" [362.24_(A)](https://2023.antflix.net#362.24_(A))", + "displayTitle": "(A) How Made", + "children": [], + "url": "https://2023.antflix.net#362.24_(A)" + }, + { + "body": "The total degrees of bends in a tubing run shall not exceed 360 degrees between pull points. [362.24_(B)](https://2023.antflix.net#362.24_(B))", + "displayTitle": "(B) Number in One Run", + "children": [], + "url": "https://2023.antflix.net#362.24_(B)" + } + ], + "url": "https://2023.antflix.net#362.24" + }, + { + "body": "All cut ends shall be trimmed inside and outside to remove rough edges. [362.28](https://2023.antflix.net#362.28)", + "displayTitle": "362.28 Trimming", + "children": [], + "url": "https://2023.antflix.net#362.28" + }, + { + "body": "ENT shall be installed as a complete system in accordance with 300.18 and shall be securely fastened in place by an approved means and supported in accordance with 362.30(A) and (B). [362.30](https://2023.antflix.net#362.30)", + "displayTitle": "362.30 Securing and Supporting", + "children": [ + { + "body": "ENT shall be securely fastened at intervals not exceeding 900 mm (3 ft). In addition, ENT shall be securely fastened in place within 900 mm (3 ft) of each outlet box, device box, junction box, cabinet, or fitting where it terminates. Where used, cable ties shall be listed for the application and for securing and supporting. Exception No. 1: Lengths not exceeding a distance of 1.8 m (6 ft) from a luminaire, terminal connection for tap connections to lighting luminaires shall be permitted without being secured. Exception No. 2: Lengths not exceeding 1.8 m (6 ft) from the last point where the raceway is securely fastened for connections within an accessible ceiling to luminaire(s) or other equipment. Exception No. 3: For concealed work in finished buildings or prefinished wall panels where such securing is impracticable, unbroken lengths (without coupling) of ENT shall be permitted to be fished. [362.30_(A)](https://2023.antflix.net#362.30_(A))", + "displayTitle": "(A) Securely Fastened", + "children": [], + "url": "https://2023.antflix.net#362.30_(A)" + }, + { + "body": "Horizontal runs of ENT supported by openings in framing members at intervals not exceeding 900 mm (3 ft) and securely fastened within 900 mm (3 ft) of termination points shall be permitted. [362.30_(B)](https://2023.antflix.net#362.30_(B))", + "displayTitle": "(B) Supports", + "children": [], + "url": "https://2023.antflix.net#362.30_(B)" + } + ], + "url": "https://2023.antflix.net#362.30" + }, + { + "body": "Where a tubing enters a box, fitting, or other enclosure, a bushing or adapter shall be provided to protect the wire from abrasion unless the box, fitting, or enclosure design provides equivalent protection. Informational Note: See 300.4(G) for the protection of conductors size 4 AWG or larger. [362.46](https://2023.antflix.net#362.46)", + "displayTitle": "362.46 Bushings", + "children": [], + "url": "https://2023.antflix.net#362.46" + }, + { + "body": "All joints between lengths of tubing and between tubing and couplings, fittings, and boxes shall be by an approved method. [362.48](https://2023.antflix.net#362.48)", + "displayTitle": "362.48 Joints", + "children": [], + "url": "https://2023.antflix.net#362.48" + }, + { + "body": "Splices and taps shall be made only in accordance with 300.15. [362.56](https://2023.antflix.net#362.56)", + "displayTitle": "362.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#362.56" + }, + { + "body": "Where equipment grounding is required, a separate grounding conductor shall be installed in the raceway in compliance with Article 250, Part VI. Exception No. 1: The equipment grounding conductor shall be permitted to be run separately from the raceway where used for grounding dc circuits as permitted in 250.134, Exception No. 2. Exception No. 2: The equipment grounding conductor shall not be required where the grounded conductor is used as part of the effective ground-fault path as permitted in 250.142. [362.60](https://2023.antflix.net#362.60)", + "displayTitle": "362.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#362.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_32_III" + }, + { + "body": "ENT shall be made of material that does not exceed the ignitibility, flammability, smoke generation, and toxicity characteristics of rigid (nonplasticized) polyvinyl chloride. ENT, as a prewired manufactured assembly, shall be provided in continuous lengths capable of being shipped in a coil, reel, or carton without damage. [362.100](https://2023.antflix.net#362.100)", + "displayTitle": "362.100 Construction", + "children": [], + "url": "https://2023.antflix.net#362.100" + }, + { + "body": "ENT shall be clearly and durably marked at least every 3 m (10 ft) as required in the first sentence of 110.21(A). The type of material shall also be included in the marking. Marking for limited smoke shall be permitted on the tubing that has limited smoke-producing characteristics. The type, size, and quantity of conductors used in prewired manufactured assemblies shall be identified by means of a printed tag or label attached to each end of the manufactured assembly and either the carton, coil, or reel. The enclosed conductors shall be marked in accordance with 310.8. [362.120](https://2023.antflix.net#362.120)", + "displayTitle": "362.120 Marking", + "children": [], + "url": "https://2023.antflix.net#362.120" + } + ], + "url": "https://2023.antflix.net#362" + }, + { + "displayTitle": "Article 366 Auxiliary Gutters", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_36_I" + }, + { + "body": "This article covers the use, installation, and construction requirements of metal auxiliary gutters and nonmetallic auxiliary gutters and associated fittings. [366.1](https://2023.antflix.net#366.1)", + "displayTitle": "366.1 Scope", + "children": [], + "url": "https://2023.antflix.net#366.1" + }, + { + "displayTitle": "366.6 Listing Requirements", + "children": [ + { + "body": "Nonmetallic auxiliary gutters installed outdoors shall be listed for all of the following conditions: Exposure to sunlightUse in wet locationsMaximum ambient temperature of the installation [366.6_(A)](https://2023.antflix.net#366.6_(A))", + "displayTitle": "(A) Outdoors", + "children": [], + "url": "https://2023.antflix.net#366.6_(A)" + }, + { + "body": "Nonmetallic auxiliary gutters installed indoors shall be listed for the maximum ambient temperature of the installation. [366.6_(B)](https://2023.antflix.net#366.6_(B))", + "displayTitle": "(B) Indoors", + "children": [], + "url": "https://2023.antflix.net#366.6_(B)" + } + ], + "url": "https://2023.antflix.net#366.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_36_II" + }, + { + "displayTitle": "366.10 Uses Permitted", + "children": [ + { + "displayTitle": "(A) Sheet Metal Auxiliary Gutters", + "children": [ + { + "body": "Sheet metal auxiliary gutters shall be permitted for indoor and outdoor use. [366.10_(A)_(1)](https://2023.antflix.net#366.10_(A)_(1))", + "displayTitle": "(1) Indoor and Outdoor Use", + "children": [], + "url": "https://2023.antflix.net#366.10_(A)_(1)" + }, + { + "body": "Sheet metal auxiliary gutters installed in wet locations shall be suitable for such locations. [366.10_(A)_(2)](https://2023.antflix.net#366.10_(A)_(2))", + "displayTitle": "(2) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#366.10_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#366.10_(A)" + }, + { + "body": "Nonmetallic auxiliary gutters shall be listed for the maximum ambient temperature of the installation and marked for the installed conductor insulation temperature rating. Informational Note: Extreme cold may cause nonmetallic auxiliary gutters to become brittle and therefore more susceptible to damage from physical contact. [366.10_(B)](https://2023.antflix.net#366.10_(B))", + "displayTitle": "(B) Nonmetallic Auxiliary Gutters", + "children": [ + { + "body": "Nonmetallic auxiliary gutters shall be permitted to be installed outdoors where listed and marked as suitable for the purpose. [366.10_(B)_(1)](https://2023.antflix.net#366.10_(B)_(1))", + "displayTitle": "(1) Outdoors", + "children": [], + "url": "https://2023.antflix.net#366.10_(B)_(1)" + }, + { + "body": "Nonmetallic auxiliary gutters shall be permitted to be installed indoors. [366.10_(B)_(2)](https://2023.antflix.net#366.10_(B)_(2))", + "displayTitle": "(2) Indoors", + "children": [], + "url": "https://2023.antflix.net#366.10_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#366.10_(B)" + }, + { + "body": "Auxiliary gutters shall be permitted to extend a distance not greater than 9 m (30 ft) beyond the equipment that it supplements. Exception: Where used in accordance with 620.35 for elevators, an auxiliary gutter shall be permitted to extend a distance greater than 9 m (30 ft) beyond the equipment it supplements. [366.10_(C)](https://2023.antflix.net#366.10_(C))", + "displayTitle": "(C) Extended Distance of Auxiliary Gutters", + "children": [], + "url": "https://2023.antflix.net#366.10_(C)" + } + ], + "url": "https://2023.antflix.net#366.10" + }, + { + "body": "Auxiliary gutters shall not be used to enclose switches, overcurrent devices, appliances, or other similar equipment. [366.12](https://2023.antflix.net#366.12)", + "displayTitle": "366.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#366.12" + }, + { + "body": "Where single conductor cables comprising each phase, neutral, or grounded conductor of an alternating-current circuit are connected in parallel as permitted in 310.10(G), the conductors shall be installed in groups consisting of not more than one conductor per phase, neutral, or grounded conductor to prevent current imbalance in the paralleled conductors due to inductive reactance. [366.20](https://2023.antflix.net#366.20)", + "displayTitle": "366.20 Conductors Connected in Parallel", + "children": [], + "url": "https://2023.antflix.net#366.20" + }, + { + "displayTitle": "366.22 Number of Conductors", + "children": [ + { + "body": "The sum of the cross-sectional areas of all contained conductors and cables at any cross section of a sheet metal auxiliary gutter shall not exceed 20 percent of the interior cross-sectional area of the sheet metal auxiliary gutter. [366.22_(A)](https://2023.antflix.net#366.22_(A))", + "displayTitle": "(A) Sheet Metal Auxiliary Gutters", + "children": [], + "url": "https://2023.antflix.net#366.22_(A)" + }, + { + "body": "The sum of cross-sectional areas of all contained conductors and cables at any cross section of the nonmetallic auxiliary gutter shall not exceed 20 percent of the interior cross-sectional area of the nonmetallic auxiliary gutter. [366.22_(B)](https://2023.antflix.net#366.22_(B))", + "displayTitle": "(B) Nonmetallic Auxiliary Gutters", + "children": [], + "url": "https://2023.antflix.net#366.22_(B)" + } + ], + "url": "https://2023.antflix.net#366.22" + }, + { + "displayTitle": "366.23 Ampacity of Conductors", + "children": [ + { + "body": "The adjustment factors in 310.15(C)(1) shall be applied only where the number of current-carrying conductors, including neutral conductors classified as current-carrying under 310.15(E), exceeds 30 at any cross section of the sheet metal auxiliary gutter. Conductors for signaling circuits or controller conductors between a motor and its starter and used only for starting duty shall not be considered as current-carrying conductors. The current carried continuously in bare copper bars in sheet metal auxiliary gutters shall not exceed 1.55 amperes/mm2 (1000 amperes/in.2) of cross section of the conductor. For aluminum bars, the current carried continuously shall not exceed 1.09 amperes/mm2 (700 amperes/in.2) of cross section of the conductor. [366.23_(A)](https://2023.antflix.net#366.23_(A))", + "displayTitle": "(A) Sheet Metal Auxiliary Gutters", + "children": [], + "url": "https://2023.antflix.net#366.23_(A)" + }, + { + "body": "The adjustment factors specified in 310.15(C)(1) shall be applicable to the current-carrying conductors up to and including the 20 percent fill specified in 366.22(B). [366.23_(B)](https://2023.antflix.net#366.23_(B))", + "displayTitle": "(B) Nonmetallic Auxiliary Gutters", + "children": [], + "url": "https://2023.antflix.net#366.23_(B)" + } + ], + "url": "https://2023.antflix.net#366.23" + }, + { + "displayTitle": "366.30 Securing and Supporting", + "children": [ + { + "body": "Sheet metal auxiliary gutters shall be supported and secured throughout their entire length at intervals not exceeding 1.5 m (5 ft). [366.30_(A)](https://2023.antflix.net#366.30_(A))", + "displayTitle": "(A) Sheet Metal Auxiliary Gutters", + "children": [], + "url": "https://2023.antflix.net#366.30_(A)" + }, + { + "body": "Nonmetallic auxiliary gutters shall be supported and secured at intervals not to exceed 900 mm (3 ft) and at each end or joint, unless listed for other support intervals. In no case shall the distance between supports exceed 3 m (10 ft). [366.30_(B)](https://2023.antflix.net#366.30_(B))", + "displayTitle": "(B) Nonmetallic Auxiliary Gutters", + "children": [], + "url": "https://2023.antflix.net#366.30_(B)" + } + ], + "url": "https://2023.antflix.net#366.30" + }, + { + "body": "Expansion fittings shall be installed where expected length change, due to expansion and contraction due to temperature change, is more than 6 mm (0.25 in.). [366.44](https://2023.antflix.net#366.44)", + "displayTitle": "366.44 Expansion Fittings", + "children": [], + "url": "https://2023.antflix.net#366.44" + }, + { + "body": "Splices and taps shall comply with 366.56(A) through (D). [366.56](https://2023.antflix.net#366.56)", + "displayTitle": "366.56 Splices and Taps", + "children": [ + { + "body": "Splices or taps shall be permitted within gutters where they are accessible by means of removable covers or doors. The conductors, including splices and taps, shall not fill the gutter to more than 75 percent of its area. [366.56_(A)](https://2023.antflix.net#366.56_(A))", + "displayTitle": "(A) Within Gutters", + "children": [], + "url": "https://2023.antflix.net#366.56_(A)" + }, + { + "body": "Taps from bare conductors shall leave the gutter opposite their terminal connections, and conductors shall not be brought in contact with uninsulated current-carrying parts of different voltages. [366.56_(B)](https://2023.antflix.net#366.56_(B))", + "displayTitle": "(B) Bare Conductors", + "children": [], + "url": "https://2023.antflix.net#366.56_(B)" + }, + { + "body": "All taps shall be suitably identified at the gutter as to the circuit or equipment that they supply. [366.56_(C)](https://2023.antflix.net#366.56_(C))", + "displayTitle": "(C) Suitably Identified", + "children": [], + "url": "https://2023.antflix.net#366.56_(C)" + }, + { + "body": "Tap connections from conductors in auxiliary gutters shall be provided with overcurrent protection as required in 240.21. [366.56_(D)](https://2023.antflix.net#366.56_(D))", + "displayTitle": "(D) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#366.56_(D)" + } + ], + "url": "https://2023.antflix.net#366.56" + }, + { + "displayTitle": "366.58 Insulated Conductors", + "children": [ + { + "body": "Where insulated conductors are deflected within an auxiliary gutter, either at the ends or where conduits, fittings, or other raceways or cables enter or leave the gutter, or where the direction of the gutter is deflected greater than 30 degrees, dimensions corresponding to one wire per terminal in Table 312.6(A) shall apply. [366.58_(A)](https://2023.antflix.net#366.58_(A))", + "displayTitle": "(A) Deflected Insulated Conductors", + "children": [], + "url": "https://2023.antflix.net#366.58_(A)" + }, + { + "body": "Where insulated conductors 4 AWG or larger are pulled through an auxiliary gutter, the distance between raceway and cable entries enclosing the same conductor shall not be less than that required in 314.28(A)(1) for straight pulls and 314.28(A)(2) for angle pulls. [366.58_(B)](https://2023.antflix.net#366.58_(B))", + "displayTitle": "(B) Auxiliary Gutters Used as Pull Boxes", + "children": [], + "url": "https://2023.antflix.net#366.58_(B)" + } + ], + "url": "https://2023.antflix.net#366.58" + }, + { + "body": "Metal auxiliary gutters shall be connected to an equipment grounding conductor(s), to an equipment bonding jumper, or to the grounded conductor where permitted or required by 250.92(B)(1) or 250.142. [366.60](https://2023.antflix.net#366.60)", + "displayTitle": "366.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#366.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_33_III" + }, + { + "displayTitle": "366.100 Construction", + "children": [ + { + "body": "Gutters shall be constructed and installed so that adequate electrical and mechanical continuity of the complete system is secured. [366.100_(A)](https://2023.antflix.net#366.100_(A))", + "displayTitle": "(A) Electrical and Mechanical Continuity", + "children": [], + "url": "https://2023.antflix.net#366.100_(A)" + }, + { + "body": "Gutters shall be of substantial construction and shall provide a complete enclosure for the contained conductors. All surfaces, both interior and exterior, shall be suitably protected from corrosion. Corner joints shall be made tight, and where the assembly is held together by rivets, bolts, or screws, such fasteners shall be spaced not more than 300 mm (12 in.) apart. [366.100_(B)](https://2023.antflix.net#366.100_(B))", + "displayTitle": "(B) Substantial Construction", + "children": [], + "url": "https://2023.antflix.net#366.100_(B)" + }, + { + "body": "Suitable bushings, shields, or fittings having smooth, rounded edges shall be provided where conductors pass between gutters, through partitions, around bends, between gutters and cabinets or junction boxes, and at other locations where necessary to prevent abrasion of the insulation of the conductors. [366.100_(C)](https://2023.antflix.net#366.100_(C))", + "displayTitle": "(C) Smooth Rounded Edges", + "children": [], + "url": "https://2023.antflix.net#366.100_(C)" + }, + { + "body": "Covers shall be securely fastened to the gutter. [366.100_(D)](https://2023.antflix.net#366.100_(D))", + "displayTitle": "(D) Covers", + "children": [], + "url": "https://2023.antflix.net#366.100_(D)" + }, + { + "body": "Bare conductors shall be securely and rigidly supported so that the minimum clearance between bare current-carrying metal parts of different voltages mounted on the same surface will not be less than 50 mm (2 in.), nor less than 25 mm (1 in.) for parts that are held free in the air. A clearance not less than 25 mm (1 in.) shall be secured between bare current-carrying metal parts and any metal surface. Adequate provisions shall be made for the expansion and contraction of busbars. [366.100_(E)](https://2023.antflix.net#366.100_(E))", + "displayTitle": "(E) Clearance of Bare Live Parts", + "children": [], + "url": "https://2023.antflix.net#366.100_(E)" + } + ], + "url": "https://2023.antflix.net#366.100" + }, + { + "displayTitle": "366.120 Marking", + "children": [ + { + "body": "Nonmetallic auxiliary gutters installed outdoors shall have the following markings: Suitable for exposure to sunlightSuitable for use in wet locationsInstalled conductor insulation temperature rating [366.120_(A)](https://2023.antflix.net#366.120_(A))", + "displayTitle": "(A) Outdoors", + "children": [], + "url": "https://2023.antflix.net#366.120_(A)" + }, + { + "body": "Nonmetallic auxiliary gutters installed indoors shall be marked with the installed conductor insulation temperature rating. [366.120_(B)](https://2023.antflix.net#366.120_(B))", + "displayTitle": "(B) Indoors", + "children": [], + "url": "https://2023.antflix.net#366.120_(B)" + } + ], + "url": "https://2023.antflix.net#366.120" + } + ], + "url": "https://2023.antflix.net#366" + }, + { + "displayTitle": "Article 368 Busways", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_37_I" + }, + { + "body": "This article covers service-entrance, feeder, and branch-circuit busways and associated fittings. [368.1](https://2023.antflix.net#368.1)", + "displayTitle": "368.1 Scope", + "children": [], + "url": "https://2023.antflix.net#368.1" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_37_II" + }, + { + "body": "Busways shall be permitted to be installed where they are located in accordance with 368.10(A) through (C). Informational Note: See 300.21 for information concerning the spread of fire or products of combustion. [368.10](https://2023.antflix.net#368.10)", + "displayTitle": "368.10 Uses Permitted", + "children": [ + { + "body": "Busways shall be permitted to be located in the open where visible, except as permitted in 368.10(C). [368.10_(A)](https://2023.antflix.net#368.10_(A))", + "displayTitle": "(A) Exposed", + "children": [], + "url": "https://2023.antflix.net#368.10_(A)" + }, + { + "body": "Busways shall be permitted to be installed behind access panels, provided the busways are totally enclosed, of nonventilating-type construction, and installed so that the joints between sections and at fittings are accessible for maintenance purposes. Where installed behind access panels, means of access shall be provided, and either of the following conditions shall be met: The space behind the access panels shall not be used for air-handling purposes.Where the space behind the access panels is used for environmental air, other than ducts and plenums, there shall be no provisions for plug-in connections, and the conductors shall be insulated. [368.10_(B)](https://2023.antflix.net#368.10_(B))", + "displayTitle": "(B) Behind Access Panels", + "children": [], + "url": "https://2023.antflix.net#368.10_(B)" + }, + { + "body": "Busways shall be permitted to be installed through walls or floors in accordance with 368.10(C)(1) and (C)(2). [368.10_(C)](https://2023.antflix.net#368.10_(C))", + "displayTitle": "(C) Through Walls and Floors", + "children": [ + { + "body": "Unbroken lengths of busway shall be permitted to be extended through dry walls. [368.10_(C)_(1)](https://2023.antflix.net#368.10_(C)_(1))", + "displayTitle": "(1) Walls", + "children": [], + "url": "https://2023.antflix.net#368.10_(C)_(1)" + }, + { + "body": "Floor penetrations shall comply with 368.10(C)(2)(a) and (C)(2)(b). Busways shall be permitted to be extended vertically through dry floors if totally enclosed (unventilated) where passing through and for a minimum distance of 1.8 m (6 ft) above the floor to provide adequate protection from physical damage.In other than industrial establishments, where a vertical riser penetrates two or more dry floors, a minimum 100-mm (4-in.) high curb shall be installed around all floor openings for riser busways to prevent liquids from entering the opening. The curb shall be installed within 300 mm (12 in.) of the floor opening. Electrical equipment shall be located so that it will not be damaged by liquids that are retained by the curb. [368.10_(C)_(2)](https://2023.antflix.net#368.10_(C)_(2))", + "displayTitle": "(2) Floors", + "children": [], + "url": "https://2023.antflix.net#368.10_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#368.10_(C)" + } + ], + "url": "https://2023.antflix.net#368.10" + }, + { + "displayTitle": "368.12 Uses Not Permitted", + "children": [ + { + "body": "Busways shall not be installed where subject to severe physical damage or corrosive vapors. [368.12_(A)](https://2023.antflix.net#368.12_(A))", + "displayTitle": "(A) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#368.12_(A)" + }, + { + "body": "Busways shall not be installed in hoistways. [368.12_(B)](https://2023.antflix.net#368.12_(B))", + "displayTitle": "(B) Hoistways", + "children": [], + "url": "https://2023.antflix.net#368.12_(B)" + }, + { + "body": "Busways shall not be installed in any hazardous (classified) location, unless specifically approved for such use. Informational Note: See 501.10(B). [368.12_(C)](https://2023.antflix.net#368.12_(C))", + "displayTitle": "(C) Hazardous Locations", + "children": [], + "url": "https://2023.antflix.net#368.12_(C)" + }, + { + "body": "Busways shall not be installed outdoors or in wet or damp locations unless identified for such use. [368.12_(D)](https://2023.antflix.net#368.12_(D))", + "displayTitle": "(D) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#368.12_(D)" + }, + { + "body": "Lighting busway and trolley busway shall not be installed less than 2.5 m (8 ft) above the floor or working platform unless provided with an identified cover. [368.12_(E)](https://2023.antflix.net#368.12_(E))", + "displayTitle": "(E) Working Platform", + "children": [], + "url": "https://2023.antflix.net#368.12_(E)" + } + ], + "url": "https://2023.antflix.net#368.12" + }, + { + "body": "Overcurrent protection shall be provided in accordance with 368.17(A) through (D). [368.17](https://2023.antflix.net#368.17)", + "displayTitle": "368.17 Overcurrent Protection", + "children": [ + { + "body": "A busway shall be protected against overcurrent in accordance with the current rating of the busway. Exception No. 1: The applicable provisions of 240.4 shall be permitted. Exception No. 2: Where used as transformer secondary ties, 450.6(A)(3) shall be permitted. [368.17_(A)](https://2023.antflix.net#368.17_(A))", + "displayTitle": "(A) Rating of Overcurrent Protection - Feeders", + "children": [], + "url": "https://2023.antflix.net#368.17_(A)" + }, + { + "body": "Overcurrent protection shall be required where busways are reduced in ampacity. Exception: For industrial establishments only, omission of overcurrent protection shall be permitted at points where busways are reduced in ampacity, provided that the length of the busway having the smaller ampacity does not exceed 15 m (50 ft) and has an ampacity at least equal to one-third the rating or setting of the overcurrent device next back on the line, and provided that such busway is free from contact with combustible material. [368.17_(B)](https://2023.antflix.net#368.17_(B))", + "displayTitle": "(B) Reduction in Ampacity Size of Busway", + "children": [], + "url": "https://2023.antflix.net#368.17_(B)" + }, + { + "body": "Where a busway is used as a feeder, devices or plug-in connections for tapping off feeder or branch circuits from the busway shall contain the overcurrent devices required for the protection of the feeder or branch circuits. The plug-in device shall consist of an externally operable circuit breaker or an externally operable fusible switch. Where such devices are mounted out of reach and contain disconnecting means, suitable means such as ropes, chains, or sticks shall be provided for operating the disconnecting means from the floor. Exception No. 1: As permitted in 240.21. Exception No. 2: For fixed or semifixed luminaires, where the branch-circuit overcurrent device is part of the luminaire cord plug on cord-connected luminaires. Exception No. 3: Where luminaires without cords are plugged directly into the busway and the overcurrent device is mounted on the luminaire. Exception No. 4: Where the branch-circuit overcurrent plug-in device is directly supplying a readily accessible disconnect, a method of floor operation shall not be required. [368.17_(C)](https://2023.antflix.net#368.17_(C))", + "displayTitle": "(C) Feeder or Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#368.17_(C)" + }, + { + "body": "A busway used as a branch circuit shall be protected against overcurrent in accordance with 210.20. [368.17_(D)](https://2023.antflix.net#368.17_(D))", + "displayTitle": "(D) Rating of Overcurrent Protection - Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#368.17_(D)" + } + ], + "url": "https://2023.antflix.net#368.17" + }, + { + "body": "Busways shall be securely supported at intervals not exceeding 1.5 m (5 ft) unless otherwise designed and marked. [368.30](https://2023.antflix.net#368.30)", + "displayTitle": "368.30 Support", + "children": [], + "url": "https://2023.antflix.net#368.30" + }, + { + "body": "Branches from busways shall be permitted to be made in accordance with 368.56(A), (B), and (C). [368.56](https://2023.antflix.net#368.56)", + "displayTitle": "368.56 Branches From Busways", + "children": [ + { + "body": "Branches from busways shall be permitted to use any of the following wiring methods: Type AC armored cableType MC metal-clad cableType MI mineral-insulated, metal-sheathed cableIMC intermediate metal conduitRMC rigid metal conduitFMC flexible metal conduitLFMC liquidtight flexible metal conduitPVC rigid polyvinyl chloride conduitRTRC reinforced thermosetting resin conduitLFNC liquidtight flexible nonmetallic conduitEMT electrical metallic tubingENT electrical nonmetallic tubingBuswaysStrut-type channel racewaySurface metal racewaySurface nonmetallic racewayWhere a separate equipment grounding conductor is used, connection of the equipment grounding conductor to the busway shall comply with 250.8 and 250.12. [368.56_(A)](https://2023.antflix.net#368.56_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#368.56_(A)" + }, + { + "body": "Suitable cord and cable assemblies identified for extra-hard usage or hard usage and listed bus drop cable shall be permitted as branches from busways for the connection of portable equipment or the connection of stationary equipment to facilitate their interchange in accordance with 400.10 and 400.12 and the following conditions: The cord or cable shall be attached to the building by an approved means.The length of the cord or cable from a busway plug-in device to a suitable tension take-up support device shall not exceed 1.8 m (6 ft).The cord and cable shall be installed as a vertical riser from the tension take-up support device to the equipment served.Strain relief cable grips shall be provided for the cord or cable at the busway plug-in device and equipment terminations.Exception to (B)(2): In industrial establishments only, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, lengths exceeding 1.8 m (6 ft) shall be permitted between the busway plug-in device and the tension take-up support device where the cord or cable is supported at intervals not exceeding 2.5 m (8 ft). [368.56_(B)](https://2023.antflix.net#368.56_(B))", + "displayTitle": "(B) Cord and Cable Assemblies", + "children": [], + "url": "https://2023.antflix.net#368.56_(B)" + }, + { + "body": "Suitable cord and cable assemblies identified for extra-hard usage or hard usage and listed bus drop cable shall be permitted as branches from trolley-type busways for the connection of movable equipment in accordance with 400.10 and 400.12. [368.56_(C)](https://2023.antflix.net#368.56_(C))", + "displayTitle": "(C) Branches From Trolley-Type Busways", + "children": [], + "url": "https://2023.antflix.net#368.56_(C)" + } + ], + "url": "https://2023.antflix.net#368.56" + }, + { + "body": "A dead end of a busway shall be closed. [368.58](https://2023.antflix.net#368.58)", + "displayTitle": "368.58 Dead Ends", + "children": [], + "url": "https://2023.antflix.net#368.58" + }, + { + "body": "Busway shall be connected to an equipment grounding conductor(s), to an equipment bonding jumper, or to the grounded conductor where permitted or required by 250.92(B)(1) or 250.142. [368.60](https://2023.antflix.net#368.60)", + "displayTitle": "368.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#368.60" + }, + { + "displayTitle": "Part III Construction", + "children": [], + "url": "https://2023.antflix.net#divider_34_III" + }, + { + "body": "Busways shall be marked with the voltage and current rating for which they are designed, and with the manufacturer's name or trademark in such a manner as to be visible after installation. [368.120](https://2023.antflix.net#368.120)", + "displayTitle": "368.120 Marking", + "children": [], + "url": "https://2023.antflix.net#368.120" + }, + { + "displayTitle": "Part IV Requirements for Over 1000 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#divider_8_IV" + }, + { + "body": "Metal-enclosed busways shall be installed so that temperature rise from induced circulating currents in adjacent ferrous metal parts will not be hazardous to personnel or constitute a fire hazard. [368.214](https://2023.antflix.net#368.214)", + "displayTitle": "368.214 Adjacent and Supporting Structures", + "children": [], + "url": "https://2023.antflix.net#368.214" + }, + { + "displayTitle": "368.234 Barriers and Seals", + "children": [ + { + "body": "Busway runs that have sections located both inside and outside of buildings shall have a vapor seal at the building wall to prevent interchange of air between indoor and outdoor sections. Exception: Vapor seals shall not be required in forced-cooled bus. [368.234_(A)](https://2023.antflix.net#368.234_(A))", + "displayTitle": "(A) Vapor Seals", + "children": [], + "url": "https://2023.antflix.net#368.234_(A)" + }, + { + "body": "Fire barriers shall be provided where fire walls, floors, or ceilings are penetrated. Informational Note: See 300.21 for information concerning the spread of fire or products of combustion. [368.234_(B)](https://2023.antflix.net#368.234_(B))", + "displayTitle": "(B) Fire Barriers", + "children": [], + "url": "https://2023.antflix.net#368.234_(B)" + } + ], + "url": "https://2023.antflix.net#368.234" + }, + { + "body": "Drain plugs, filter drains, or similar methods shall be provided to remove condensed moisture from low points in busway run. [368.236](https://2023.antflix.net#368.236)", + "displayTitle": "368.236 Drain Facilities", + "children": [], + "url": "https://2023.antflix.net#368.236" + }, + { + "body": "Ventilated busway enclosures shall be installed in accordance with Article 110, Part III, and 495.24. [368.237](https://2023.antflix.net#368.237)", + "displayTitle": "368.237 Ventilated Bus Enclosures", + "children": [], + "url": "https://2023.antflix.net#368.237" + }, + { + "body": "Where bus enclosures terminate at machines cooled by flammable gas, seal-off bushings, baffles, or other means shall be provided to prevent accumulation of flammable gas in the busway enclosures. All conductor termination and connection hardware shall be accessible for installation, connection, and maintenance. [368.238](https://2023.antflix.net#368.238)", + "displayTitle": "368.238 Terminations and Connections", + "children": [], + "url": "https://2023.antflix.net#368.238" + }, + { + "body": "Switching devices or disconnecting links provided in the busway run shall have the same momentary rating as the busway. Disconnecting links shall be plainly marked to be removable only when bus is de-energized. Switching devices that are not load-break shall be interlocked to prevent operation under load, and disconnecting link enclosures shall be interlocked to prevent access to energized parts. [368.239](https://2023.antflix.net#368.239)", + "displayTitle": "368.239 Switches", + "children": [], + "url": "https://2023.antflix.net#368.239" + }, + { + "body": "Secondary control devices and wiring that are provided as part of the metal-enclosed bus run shall be insulated by fire-retardant barriers from all primary circuit elements with the exception of short lengths of wire, such as at instrument transformer terminals. [368.240](https://2023.antflix.net#368.240)", + "displayTitle": "368.240 Wiring 1000 Volts or Less, Nominal", + "children": [], + "url": "https://2023.antflix.net#368.240" + }, + { + "body": "Flexible or expansion connections shall be provided in long, straight runs of bus to allow for temperature expansion or contraction, or where the busway run crosses building vibration insulation joints. [368.244](https://2023.antflix.net#368.244)", + "displayTitle": "368.244 Expansion Fittings", + "children": [], + "url": "https://2023.antflix.net#368.244" + }, + { + "body": "Neutral bus, where required, shall be sized to carry all neutral load current, including harmonic currents, and shall have adequate momentary and short-circuit current rating consistent with system requirements. [368.258](https://2023.antflix.net#368.258)", + "displayTitle": "368.258 Neutral Conductor", + "children": [], + "url": "https://2023.antflix.net#368.258" + }, + { + "body": "Metal-enclosed busway shall be grounded. [368.260](https://2023.antflix.net#368.260)", + "displayTitle": "368.260 Grounding", + "children": [], + "url": "https://2023.antflix.net#368.260" + }, + { + "body": "Each busway run shall be provided with a permanent nameplate on which the following information shall be provided: Rated voltage.Rated continuous current; if bus is forced-cooled, both the normal forced-cooled rating and the self-cooled (not forced-cooled) rating for the same temperature rise shall be given.Rated frequency.Rated impulse withstand voltage.Rated 60-Hz withstand voltage (dry).Rated momentary current.Manufacturer's name or trademark.Informational Note: See IEEE C37.23-2015, IEEE Standard for Metal-Enclosed Bus, for construction and testing requirements for metal-enclosed bus assemblies. [368.320](https://2023.antflix.net#368.320)", + "displayTitle": "368.320 Marking", + "children": [], + "url": "https://2023.antflix.net#368.320" + } + ], + "url": "https://2023.antflix.net#368" + }, + { + "displayTitle": "Article 369 Insulated Bus Pipe (IBP)/Tubular Covered Conductors (TCC) Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_38_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for insulated bus pipe (IBP) systems. [369.1](https://2023.antflix.net#369.1)", + "displayTitle": "369.1 Scope", + "children": [], + "url": "https://2023.antflix.net#369.1" + }, + { + "body": "IBP and IBP systems shall not be reconditioned. [369.2](https://2023.antflix.net#369.2)", + "displayTitle": "369.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#369.2" + }, + { + "body": "IBP and IBP systems shall be listed. [369.6](https://2023.antflix.net#369.6)", + "displayTitle": "369.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#369.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_38_II" + }, + { + "body": "IBP systems shall be permitted for use on power systems in accordance with the following: As exposed runs in accordance with 305.3.In wet or damp locations only when listed for such use.Installed through walls, in unbroken lengths. Where IBP penetrates an exterior wall, the entire length that penetrates the wall shall be listed for outdoor use, and the opening in the wall shall be sealed by an approved method.Extended vertically through dry floors if totally enclosed in metal where passing through the floor and for a minimum distance of 1.8 m (6 ft) above the floor to provide protection from physical damage.For voltages up to and including 35,000 volts ac nominal. [369.10](https://2023.antflix.net#369.10)", + "displayTitle": "369.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#369.10" + }, + { + "body": "IBP systems shall not be used under the following conditions: In any hazardous (classified) location except as permitted by other articles in this CodeFor the support of luminaires or other equipmentWhere concealed by the building structureWhere accessible to other than qualified person(s) [369.12](https://2023.antflix.net#369.12)", + "displayTitle": "369.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#369.12" + }, + { + "body": "IBP systems shall be installed by qualified persons. All documentation shall be available to the authority having jurisdiction. [369.14](https://2023.antflix.net#369.14)", + "displayTitle": "369.14 Installation", + "children": [], + "url": "https://2023.antflix.net#369.14" + }, + { + "body": "Manufacturer's supplied terminating means shall be used for IBP system connections or terminations. Connections employing dissimilar metals shall be avoided to eliminate the possibility of galvanic action. Informational Note No. 1: See 110.14(C) for conductor temperature limitations due to termination provisions for installations up to and including 2000 volts. Informational Note No. 2: See 110.40 for conductor temperature limitations due to termination provisions for installations 2001 volts to 35,000 volts. [369.20](https://2023.antflix.net#369.20)", + "displayTitle": "369.20 Termination or Connections", + "children": [], + "url": "https://2023.antflix.net#369.20" + }, + { + "body": "IBP systems shall be used within the marked ampacity of the IBP. [369.80](https://2023.antflix.net#369.80)", + "displayTitle": "369.80 Ampacity", + "children": [], + "url": "https://2023.antflix.net#369.80" + }, + { + "body": "IBP systems shall be used within the maximum rated conductor temperature. [369.90](https://2023.antflix.net#369.90)", + "displayTitle": "369.90 Temperature Rating", + "children": [], + "url": "https://2023.antflix.net#369.90" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_35_III" + }, + { + "body": "The IBP conductor shall be aluminum or copper. The bus pipe shall be permitted to be solid or hollow. [369.100](https://2023.antflix.net#369.100)", + "displayTitle": "369.100 Construction", + "children": [], + "url": "https://2023.antflix.net#369.100" + }, + { + "body": "Fire barriers shall be provided where fire walls, floors, or ceilings are penetrated. Informational Note: See 300.21 for information concerning the spread of fire or products of combustion. [369.110](https://2023.antflix.net#369.110)", + "displayTitle": "369.110 Barriers", + "children": [], + "url": "https://2023.antflix.net#369.110" + }, + { + "body": "All IBP shall be marked to indicate the following information: The maximum rated voltage phase-to-phase or phase-to-groundThe maximum rated ampacityThe manufacturer's name, trademark, or other distinctive marking by which the organization responsible for the product can be readily identifiedThe equivalent AWG size or circular mil area of the conductorThe maximum rated conductor temperatureThe rated peak withstand current rating in rms symmetrical amperes or kAEnclosure type designation, if other than Type 1Rated short-time withstand current and duration if greater than 2 seconds [369.120](https://2023.antflix.net#369.120)", + "displayTitle": "369.120 Marking", + "children": [], + "url": "https://2023.antflix.net#369.120" + } + ], + "url": "https://2023.antflix.net#369" + }, + { + "displayTitle": "Article 370 Cablebus", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_39_I" + }, + { + "body": "This article covers the use and installation requirements of cablebus and associated fittings. [370.1](https://2023.antflix.net#370.1)", + "displayTitle": "370.1 Scope", + "children": [], + "url": "https://2023.antflix.net#370.1" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_39_II" + }, + { + "body": "Cablebus shall be permitted as follows: At any voltage or current for which spaced conductors are rated and where installed only for exposed work, except as permitted in 370.18For branch circuits, feeders, and servicesTo be installed indoors, outdoors, or in corrosive, wet, or damp locations where identified for the use [370.10](https://2023.antflix.net#370.10)", + "displayTitle": "370.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#370.10" + }, + { + "body": "Cablebus shall not be permitted to be installed in the following: HoistwaysHazardous (classified) locations, unless specifically permitted in Chapter 5 [370.12](https://2023.antflix.net#370.12)", + "displayTitle": "370.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#370.12" + }, + { + "body": "Cablebus shall be permitted to extend transversely through partitions and walls or vertically through platforms and floors in wet or dry locations where the installation, complete with the installed cables, is made in accordance with 300.21. [370.18](https://2023.antflix.net#370.18)", + "displayTitle": "370.18 Cablebus Installation", + "children": [], + "url": "https://2023.antflix.net#370.18" + }, + { + "displayTitle": "370.20 Conductor Size and Termination", + "children": [ + { + "body": "The current-carrying conductors in cablebus shall comply with the following: Have an insulation rating of 75\u00b0C (167\u00b0F) or higher and be of an approved type suitable for the applicationBe sized in accordance with the design of the cablebus but in no case be smaller than 1/0 [370.20_(A)](https://2023.antflix.net#370.20_(A))", + "displayTitle": "(A) Conductors", + "children": [], + "url": "https://2023.antflix.net#370.20_(A)" + }, + { + "body": "Approved terminating means shall be used for connections to cablebus conductors. Informational Note No. 1: See 110.14(C) for conductor temperature limitations due to termination provisions for installations up to and including 2000 volts. Informational Note No. 2: See 110.40 for conductor temperature limitations due to termination provisions for installations 2001 volts to 35,000 volts. [370.20_(B)](https://2023.antflix.net#370.20_(B))", + "displayTitle": "(B) Termination", + "children": [], + "url": "https://2023.antflix.net#370.20_(B)" + } + ], + "url": "https://2023.antflix.net#370.20" + }, + { + "body": "The number of conductors shall be that for which the cablebus is designed. [370.22](https://2023.antflix.net#370.22)", + "displayTitle": "370.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#370.22" + }, + { + "body": "Cablebus shall be protected against overcurrent in accordance with the ampacity of the cablebus conductors in accordance with 240.4. Exception: Overcurrent protection shall be permitted in accordance with 245.26 and 245.27. [370.23](https://2023.antflix.net#370.23)", + "displayTitle": "370.23 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#370.23" + }, + { + "displayTitle": "370.30 Securing and Supporting", + "children": [ + { + "body": "Cablebus shall be securely supported at intervals not exceeding 3.7 m (12 ft). Where spans longer than 3.7 m (12 ft) are required, the structure shall be specifically designed for the required span length. [370.30_(A)](https://2023.antflix.net#370.30_(A))", + "displayTitle": "(A) Cablebus Supports", + "children": [], + "url": "https://2023.antflix.net#370.30_(A)" + }, + { + "body": "The insulated conductors shall be supported on blocks or other identified mounting means. The individual conductors in a cablebus shall be supported at intervals not greater than 900 mm (3 ft) for horizontal runs and 450 mm (11/2 ft) for vertical runs. Vertical and horizontal spacing between supported conductors shall be not less than one conductor diameter at the points of support. [370.30_(B)](https://2023.antflix.net#370.30_(B))", + "displayTitle": "(B) Conductor Supports", + "children": [], + "url": "https://2023.antflix.net#370.30_(B)" + } + ], + "url": "https://2023.antflix.net#370.30" + }, + { + "body": "A cablebus system shall include fittings for the following: Changes in horizontal or vertical direction of the runTerminations in or on connected apparatus or equipment or the enclosures for such equipmentAdditional physical protection where required, such as guards where subject to severe physical damage [370.42](https://2023.antflix.net#370.42)", + "displayTitle": "370.42 Fittings", + "children": [], + "url": "https://2023.antflix.net#370.42" + }, + { + "body": "A cablebus system shall be grounded and/or bonded as applicable: Cablebus framework, where bonded, shall be permitted to be used as the equipment grounding conductor for branch circuits and feeders.A cablebus installation shall be grounded and bonded in accordance with Part V and Part VI of Article 250, excluding 250.86. Exception No. 2. [370.60](https://2023.antflix.net#370.60)", + "displayTitle": "370.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#370.60" + }, + { + "body": "The ampacity of conductors in cablebus shall be in accordance with 310.17 and 310.19 for installations up to and including 2000 volts, or with Table 315.60(C)(3) and Table 315.60(C)(4) for installations 2001 volts to 35,000 volts. [370.80](https://2023.antflix.net#370.80)", + "displayTitle": "370.80 Ampacity of Conductors", + "children": [], + "url": "https://2023.antflix.net#370.80" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_36_III" + }, + { + "displayTitle": "370.120 Marking", + "children": [ + { + "body": "Each cablebus system shall include a nameplate at each terminating end of the system with the manufacturer's name or trade designation and the maximum diameter, number, voltage rating, and ampacity of the conductors to be installed. Nameplates shall be visible after installation. [370.120_(A)](https://2023.antflix.net#370.120_(A))", + "displayTitle": "(A) Nameplates", + "children": [], + "url": "https://2023.antflix.net#370.120_(A)" + }, + { + "body": "Each section and fitting of a cablebus system shall be identified with a marking that corresponds to the manufacturer's installation instructions. [370.120_(B)](https://2023.antflix.net#370.120_(B))", + "displayTitle": "(B) Identification", + "children": [], + "url": "https://2023.antflix.net#370.120_(B)" + } + ], + "url": "https://2023.antflix.net#370.120" + } + ], + "url": "https://2023.antflix.net#370" + }, + { + "displayTitle": "Article 371 Flexible Bus Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_40_I" + }, + { + "body": "This article covers the use and installation requirements of flexible bus systems and associated fittings. [371.1](https://2023.antflix.net#371.1)", + "displayTitle": "371.1 Scope", + "children": [], + "url": "https://2023.antflix.net#371.1" + }, + { + "body": "Flexible bus systems shall be listed. [371.6](https://2023.antflix.net#371.6)", + "displayTitle": "371.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#371.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_40_II" + }, + { + "body": "Flexible bus systems shall be permitted for the following: Services, feeders, and branch circuitsIndoorsOutdoors where identified for outdoor useInstalled in corrosive, wet, or damp locations where identified for useExposedBehind access panels where the space behind the access panel is not used for air-handling purposesTo penetrate through walls and floors in accordance with 371.18 [371.10](https://2023.antflix.net#371.10)", + "displayTitle": "371.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#371.10" + }, + { + "body": "Flexible bus systems shall not be permitted to be installed in the following: HoistwaysWhere exposed to severe physical damageHazardous (classified) locations, unless specifically permitted in Chapter 5Air-handling spaces [371.12](https://2023.antflix.net#371.12)", + "displayTitle": "371.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#371.12" + }, + { + "body": "Flexible bus systems shall be designed and specified for specific installation site applications by a qualified engineer within the limits of the listing and manufacturer's installation instructions. All documentation shall be available to the authority having jurisdiction. [371.14](https://2023.antflix.net#371.14)", + "displayTitle": "371.14 Installation Design", + "children": [], + "url": "https://2023.antflix.net#371.14" + }, + { + "body": "Overcurrent protection shall be provided in accordance with 371.17(A) through (G). [371.17](https://2023.antflix.net#371.17)", + "displayTitle": "371.17 Overcurrent Protection", + "children": [ + { + "body": "Flexible bus systems installed for services shall be protected against overcurrent in accordance with 230.90. [371.17_(A)](https://2023.antflix.net#371.17_(A))", + "displayTitle": "(A) Rating of Overcurrent Protection - Services", + "children": [], + "url": "https://2023.antflix.net#371.17_(A)" + }, + { + "body": "Flexible bus systems installed as feeders shall be protected against overcurrent in accordance with 215.3. Exception: The applicable requirements of 240.4 shall be permitted. [371.17_(B)](https://2023.antflix.net#371.17_(B))", + "displayTitle": "(B) Rating of Overcurrent Protection - Feeders", + "children": [], + "url": "https://2023.antflix.net#371.17_(B)" + }, + { + "body": "Flexible bus systems installed as branch circuits shall be protected against overcurrent in accordance with 210.20. Exception: The applicable requirements of 240.4 shall be permitted. [371.17_(C)](https://2023.antflix.net#371.17_(C))", + "displayTitle": "(C) Rating of Overcurrent Protection - Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#371.17_(C)" + }, + { + "body": "Flexible bus systems installed on a transformer secondary to the disconnect and overcurrent protection device shall be protected from overcurrent in accordance with 240.21 (C). [371.17_(D)](https://2023.antflix.net#371.17_(D))", + "displayTitle": "(D) Transformer Secondary Flexible Bus Systems", + "children": [], + "url": "https://2023.antflix.net#371.17_(D)" + }, + { + "body": "Flexible bus systems installed from generator terminals that meet the size requirement in 445.13 shall be permitted to be protected against overload by the generator overload protective device(s) required by 445.12. [371.17_(E)](https://2023.antflix.net#371.17_(E))", + "displayTitle": "(E) Flexible Bus Systems From Generator Terminals", + "children": [], + "url": "https://2023.antflix.net#371.17_(E)" + }, + { + "body": "Flexible bus systems installed for battery systems shall be protected from overcurrent in accordance with 240.21 (H). [371.17_(F)](https://2023.antflix.net#371.17_(F))", + "displayTitle": "(F) Flexible Bus Systems From Battery Terminals", + "children": [], + "url": "https://2023.antflix.net#371.17_(F)" + }, + { + "body": "Overcurrent protection shall be required at the point where flexible bus systems are reduced in size. Exception: For industrial establishments only, omission of overcurrent protection shall be permitted at points where a flexible bus system is reduced in size, provided that the length of the flexible bus system having a reduced size does not exceed 15 m (50 ft) and has a current rating at least equal to one-third the rating or setting of the overcurrent device ahead of the point of connection and provided that such a flexible bus system is free from contact with combustible material. [371.17_(G)](https://2023.antflix.net#371.17_(G))", + "displayTitle": "(G) Reduction in Size of Flexible Bus Systems", + "children": [], + "url": "https://2023.antflix.net#371.17_(G)" + } + ], + "url": "https://2023.antflix.net#371.17" + }, + { + "body": "Installation of flexible bus systems shall comply with 371.18(A) through (E). [371.18](https://2023.antflix.net#371.18)", + "displayTitle": "371.18 Flexible Bus Systems Installation", + "children": [ + { + "body": "Flexible bus systems shall be installed under design engineering supervision and in accordance with the manufacturer's instructions, including supporting and securing. All documentation shall be available to the authority having jurisdiction. [371.18_(A)](https://2023.antflix.net#371.18_(A))", + "displayTitle": "(A) Manufacturer's Installation Instructions", + "children": [], + "url": "https://2023.antflix.net#371.18_(A)" + }, + { + "body": "Flexible bus systems subject to physical damage shall have approved protective means installed. Informational Note: Typical methods of protecting flexible bus systems from physical damage include suitable barriers, guards, or elevation. [371.18_(B)](https://2023.antflix.net#371.18_(B))", + "displayTitle": "(B) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#371.18_(B)" + }, + { + "body": "Flexible bus systems shall be permitted to extend transversely through partitions or walls if the section within the wall is continuous and protected against physical damage. Where the flexible bus systems penetrate a fire-resistant-rated wall or partition, the installation shall be made in accordance with 300.21. [371.18_(C)](https://2023.antflix.net#371.18_(C))", + "displayTitle": "(C) Transversely Routed", + "children": [], + "url": "https://2023.antflix.net#371.18_(C)" + }, + { + "body": "Flexible bus systems shall be permitted to extend vertically through dry floors and platforms. Where the flexible bus systems penetrate a fire-resistant-rated floor or ceiling, the installation shall be made in accordance with 300.21. [371.18_(D)](https://2023.antflix.net#371.18_(D))", + "displayTitle": "(D) Through Dry Floors and Platforms", + "children": [], + "url": "https://2023.antflix.net#371.18_(D)" + }, + { + "body": "Flexible bus systems shall be permitted to extend vertically through floors and platforms in wet locations as follows: Where there are curbs or other suitable means to prevent waterflow through the floor or platform openingWhere the flexible bus system provides a means to seal the floor penetrationWhere the flexible bus systems penetrate a fire-resistant-rated floor or ceiling, the installation shall be made in accordance with 300.21. [371.18_(E)](https://2023.antflix.net#371.18_(E))", + "displayTitle": "(E) Through Floors and Platforms in Wet Locations", + "children": [], + "url": "https://2023.antflix.net#371.18_(E)" + } + ], + "url": "https://2023.antflix.net#371.18" + }, + { + "body": "Flexible bus system terminations shall comply with 371.20(A) and (B). [371.20](https://2023.antflix.net#371.20)", + "displayTitle": "371.20 Terminations", + "children": [ + { + "body": "Flexible bus systems shall be terminated with fittings or connectors listed for flexible bus systems. Informational Note: See 110.14(C) for conductor temperature limitations due to termination provisions. [371.20_(A)](https://2023.antflix.net#371.20_(A))", + "displayTitle": "(A) Termination Fittings or Connectors", + "children": [], + "url": "https://2023.antflix.net#371.20_(A)" + }, + { + "body": "The connection of a flexible bus system to the distribution equipment shall comply with one of the following: Be listed and marked by the specific distribution equipment as an acceptable means of terminationBe listed and identified for the specific distribution equipment as an acceptable means of terminationIncorporate, as part of the listed flexible bus system, a transition box to interface between the flexible bus system and the distribution equipment [371.20_(B)](https://2023.antflix.net#371.20_(B))", + "displayTitle": "(B) Connection to Equipment", + "children": [], + "url": "https://2023.antflix.net#371.20_(B)" + } + ], + "url": "https://2023.antflix.net#371.20" + }, + { + "body": "Flexible insulated bus conductors shall be supported on identified mounting means at intervals not greater than 900 mm (3 ft) for horizontal runs and 450 mm (11/2 ft) for vertical runs unless otherwise permitted by the product listing. Flexible bus systems shall be secured and supported by listed associated fittings in accordance with 371.30(A) through (C). [371.30](https://2023.antflix.net#371.30)", + "displayTitle": "371.30 Securing and Supporting", + "children": [ + { + "body": "Associated fittings shall be part of a listed flexible bus system. [371.30_(A)](https://2023.antflix.net#371.30_(A))", + "displayTitle": "(A) Associated Fittings", + "children": [], + "url": "https://2023.antflix.net#371.30_(A)" + }, + { + "body": "The support brackets for flexible bus systems shall be secured to the building structure or to other associated fittings that are secured to the building structure. [371.30_(B)](https://2023.antflix.net#371.30_(B))", + "displayTitle": "(B) Support Brackets", + "children": [], + "url": "https://2023.antflix.net#371.30_(B)" + }, + { + "body": "Flexible bus systems shall be permitted to be installed in support trays supplied as associated fittings for the listed flexible bus system. Support trays shall not be required to be continuous. [371.30_(C)](https://2023.antflix.net#371.30_(C))", + "displayTitle": "(C) Support Tray", + "children": [], + "url": "https://2023.antflix.net#371.30_(C)" + } + ], + "url": "https://2023.antflix.net#371.30" + }, + { + "body": "Flexible bus systems shall have a short circuit current rating sufficient for the available fault current. [371.40](https://2023.antflix.net#371.40)", + "displayTitle": "371.40 Short Circuit Current Rating", + "children": [], + "url": "https://2023.antflix.net#371.40" + }, + { + "body": "Conductive associated fitting supports for flexible bus systems shall be bonded together and grounded. [371.60](https://2023.antflix.net#371.60)", + "displayTitle": "371.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#371.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_37_III" + }, + { + "body": "Each section of flexible bus systems shall be marked with the manufacturer's name or trade designation, voltage rating, and current rating. Markings shall be located so as to be visible after installation. [371.120](https://2023.antflix.net#371.120)", + "displayTitle": "371.120 Marking", + "children": [ + { + "body": "A system nameplate shall contain the manufacturer's name or trademark and the flexible bus system ratings. The ratings shall include the voltage, phase, current rating, short circuit current rating, and applicable environmental ratings. The nameplate shall be installed at each end of the flexible bus system. The nameplate shall be visible after installation. [371.120_(A)](https://2023.antflix.net#371.120_(A))", + "displayTitle": "(A) System Nameplate", + "children": [], + "url": "https://2023.antflix.net#371.120_(A)" + }, + { + "body": "Associated fittings shall be marked as suitable for flexible bus systems. [371.120_(B)](https://2023.antflix.net#371.120_(B))", + "displayTitle": "(B) Associated Fittings", + "children": [], + "url": "https://2023.antflix.net#371.120_(B)" + }, + { + "body": "The flexible insulated bus shall be marked along the insulation with the manufacturer's name or trademark, voltage, manufacturer's part identification, and insulation temperature ratings. [371.120_(C)](https://2023.antflix.net#371.120_(C))", + "displayTitle": "(C) Flexible Insulated Bus", + "children": [], + "url": "https://2023.antflix.net#371.120_(C)" + } + ], + "url": "https://2023.antflix.net#371.120" + } + ], + "url": "https://2023.antflix.net#371" + }, + { + "displayTitle": "Article 372 Cellular Concrete Floor Raceways", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_41_I" + }, + { + "body": "This article covers cellular concrete floor raceways, the hollow spaces in floors constructed of precast cellular concrete slabs, together with suitable metal fittings designed to provide access to the floor cells. [372.1](https://2023.antflix.net#372.1)", + "displayTitle": "372.1 Scope", + "children": [], + "url": "https://2023.antflix.net#372.1" + }, + { + "displayTitle": "Part II Installations", + "children": [], + "url": "https://2023.antflix.net#divider_41_II" + }, + { + "body": "Conductors shall not be installed in precast cellular concrete floor raceways as follows: Where subject to corrosive vaporIn any hazardous (classified) location, except as permitted by other articles in this CodeIn commercial garages, other than for supplying ceiling outlets or extensions to the area below the floor but not aboveInformational Note: See 300.8 for installation of conductors with other systems. [372.12](https://2023.antflix.net#372.12)", + "displayTitle": "372.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#372.12" + }, + { + "body": "Installation of cellular concrete floor raceways shall comply with 372.18(A) through (E). [372.18](https://2023.antflix.net#372.18)", + "displayTitle": "372.18 Cellular Concrete Floor Raceways Installation", + "children": [ + { + "body": "The header shall be installed in a straight line at right angles to the cells. The header shall be mechanically secured to the top of the precast cellular concrete floor. The end joints shall be closed by a metal closure fitting and sealed against the entrance of concrete. The header shall be electrically continuous throughout its entire length and shall be electrically bonded to the enclosure of the distribution center. [372.18_(A)](https://2023.antflix.net#372.18_(A))", + "displayTitle": "(A) Header", + "children": [], + "url": "https://2023.antflix.net#372.18_(A)" + }, + { + "body": "Connections from headers to cabinets and other enclosures shall be made by means of listed metal raceways and listed fittings. [372.18_(B)](https://2023.antflix.net#372.18_(B))", + "displayTitle": "(B) Connection to Cabinets and Other Enclosures", + "children": [], + "url": "https://2023.antflix.net#372.18_(B)" + }, + { + "body": "Junction boxes shall be leveled to the floor grade and sealed against the free entrance of water or concrete. Junction boxes shall be of metal and shall be mechanically and electrically continuous with the header. [372.18_(C)](https://2023.antflix.net#372.18_(C))", + "displayTitle": "(C) Junction Boxes", + "children": [], + "url": "https://2023.antflix.net#372.18_(C)" + }, + { + "body": "Inserts shall be leveled and sealed against the entrance of concrete. Inserts shall be of metal and shall be fitted with grounded-type receptacles. An equipment grounding conductor or bonding jumper shall connect the insert receptacles to a positive ground connection provided on the header. Where cutting through the cell wall for setting inserts or other purposes (such as providing access openings between header and cells), chips and other dirt shall not be allowed to remain in the raceway, and the tool used shall be designed so as to prevent the tool from entering the cell and damaging the conductors. [372.18_(D)](https://2023.antflix.net#372.18_(D))", + "displayTitle": "(D) Inserts", + "children": [], + "url": "https://2023.antflix.net#372.18_(D)" + }, + { + "body": "A suitable number of markers shall be installed for the future location of cells. [372.18_(E)](https://2023.antflix.net#372.18_(E))", + "displayTitle": "(E) Markers", + "children": [], + "url": "https://2023.antflix.net#372.18_(E)" + } + ], + "url": "https://2023.antflix.net#372.18" + }, + { + "body": "No conductor larger than 1/0 AWG shall be installed, except by special permission. [372.20](https://2023.antflix.net#372.20)", + "displayTitle": "372.20 Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#372.20" + }, + { + "body": "The combined cross-sectional area of all conductors or cables shall not exceed 40 percent of the cross-sectional area of the cell or header. [372.22](https://2023.antflix.net#372.22)", + "displayTitle": "372.22 Maximum Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#372.22" + }, + { + "body": "The ampacity adjustment factors as provided in 310.15(C) shall apply to conductors installed in cellular concrete floor raceways. [372.23](https://2023.antflix.net#372.23)", + "displayTitle": "372.23 Ampacity of Conductors", + "children": [], + "url": "https://2023.antflix.net#372.23" + }, + { + "body": "Splices and taps shall be made only in header access units or junction boxes. A continuous unbroken conductor connecting the individual outlets is not a splice or tap. [372.56](https://2023.antflix.net#372.56)", + "displayTitle": "372.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#372.56" + }, + { + "body": "When an outlet is abandoned, discontinued, or removed, the sections of circuit conductors supplying the outlet shall be removed from the raceway. No splices or reinsulated conductors, such as would be the case of abandoned outlets on loop wiring, shall be allowed in raceways. [372.58](https://2023.antflix.net#372.58)", + "displayTitle": "372.58 Discontinued Outlets", + "children": [], + "url": "https://2023.antflix.net#372.58" + } + ], + "url": "https://2023.antflix.net#372" + }, + { + "displayTitle": "Article 374 Cellular Metal Floor Raceways", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_42_I" + }, + { + "body": "This article covers the use and installation requirements for cellular metal floor raceways. [374.1](https://2023.antflix.net#374.1)", + "displayTitle": "374.1 Scope", + "children": [], + "url": "https://2023.antflix.net#374.1" + }, + { + "body": "Cellular metal floor raceways and associated fittings shall be listed. [374.6](https://2023.antflix.net#374.6)", + "displayTitle": "374.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#374.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_42_II" + }, + { + "body": "Conductors shall not be installed in cellular metal floor raceways as follows: Where subject to corrosive vaporIn any hazardous (classified) location, except as permitted by other articles in this CodeIn commercial garages, other than for supplying ceiling outlets or extensions to the area below the floor but not aboveInformational Note: See 300.8 for installation of conductors with other systems. [374.12](https://2023.antflix.net#374.12)", + "displayTitle": "374.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#374.12" + }, + { + "body": "Installation of cellular metal floor raceways shall comply with 374.18(A) through (D). [374.18](https://2023.antflix.net#374.18)", + "displayTitle": "374.18 Cellular Metal Floor Raceways Installations", + "children": [ + { + "body": "Connections between raceways and distribution centers and wall outlets shall be made by means of liquidtight flexible metal conduit, flexible metal conduit where not installed in concrete, rigid metal conduit, intermediate metal conduit, electrical metallic tubing, or approved fittings. Where there are provisions for the termination of an equipment grounding conductor, rigid polyvinyl chloride conduit, reinforced thermosetting resin conduit, electrical nonmetallic tubing, or liquidtight flexible nonmetallic conduit shall be permitted. Where installed in concrete, liquidtight flexible metal conduit and liquidtight flexible nonmetallic conduit shall be listed and marked for direct burial. [374.18_(A)](https://2023.antflix.net#374.18_(A))", + "displayTitle": "(A) Connection to Cabinets and Extensions From Cells", + "children": [], + "url": "https://2023.antflix.net#374.18_(A)" + }, + { + "body": "Junction boxes shall be leveled to the floor grade and sealed against the free entrance of water or concrete. Junction boxes used with these raceways shall be of metal and shall be electrically continuous with the raceway. [374.18_(B)](https://2023.antflix.net#374.18_(B))", + "displayTitle": "(B) Junction Boxes", + "children": [], + "url": "https://2023.antflix.net#374.18_(B)" + }, + { + "body": "Inserts shall be leveled to the floor grade and sealed against the entrance of concrete. Inserts shall be of metal and shall be electrically continuous with the raceway. In cutting through the cell wall and setting inserts, chips and other dirt shall not be allowed to remain in the raceway, and tools shall be used that are designed to prevent the tool from entering the cell and damaging the conductors. [374.18_(C)](https://2023.antflix.net#374.18_(C))", + "displayTitle": "(C) Inserts", + "children": [], + "url": "https://2023.antflix.net#374.18_(C)" + }, + { + "body": "A suitable number of markers shall be installed for locating cells in the future. [374.18_(D)](https://2023.antflix.net#374.18_(D))", + "displayTitle": "(D) Markers", + "children": [], + "url": "https://2023.antflix.net#374.18_(D)" + } + ], + "url": "https://2023.antflix.net#374.18" + }, + { + "body": "No conductor larger than 1/0 AWG shall be installed, except by special permission. [374.20](https://2023.antflix.net#374.20)", + "displayTitle": "374.20 Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#374.20" + }, + { + "body": "The combined cross-sectional area of all conductors or cables shall not exceed 40 percent of the interior cross-sectional area of the cell or header. [374.22](https://2023.antflix.net#374.22)", + "displayTitle": "374.22 Maximum Number of Conductors in Raceway", + "children": [], + "url": "https://2023.antflix.net#374.22" + }, + { + "body": "The ampacity adjustment factors in 310.15(C) shall apply to conductors installed in cellular metal floor raceways. [374.23](https://2023.antflix.net#374.23)", + "displayTitle": "374.23 Ampacity of Conductors", + "children": [], + "url": "https://2023.antflix.net#374.23" + }, + { + "body": "Splices and taps shall be made only in header access units or junction boxes. For the purposes of this section, so-called loop wiring (continuous unbroken conductor connecting the individual outlets) shall not be considered to be a splice or tap. [374.56](https://2023.antflix.net#374.56)", + "displayTitle": "374.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#374.56" + }, + { + "body": "When an outlet is abandoned, discontinued, or removed, the sections of circuit conductors supplying the outlet shall be removed from the raceway. No splices or reinsulated conductors, such as would be the case with abandoned outlets on loop wiring, shall be allowed in raceways. [374.58](https://2023.antflix.net#374.58)", + "displayTitle": "374.58 Discontinued Outlets", + "children": [], + "url": "https://2023.antflix.net#374.58" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_38_III" + }, + { + "body": "Cellular metal floor raceways shall be constructed so that adequate electrical and mechanical continuity of the complete system will be secured. They shall provide a complete enclosure for the conductors. The interior surfaces shall be free from burrs and sharp edges, and surfaces over which conductors are drawn shall be smooth. Suitable bushings or fittings having smooth rounded edges shall be provided where conductors pass. [374.100](https://2023.antflix.net#374.100)", + "displayTitle": "374.100 General", + "children": [], + "url": "https://2023.antflix.net#374.100" + } + ], + "url": "https://2023.antflix.net#374" + }, + { + "displayTitle": "Article 376 Metal Wireways", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_43_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for metal wireways and associated fittings. [376.1](https://2023.antflix.net#376.1)", + "displayTitle": "376.1 Scope", + "children": [], + "url": "https://2023.antflix.net#376.1" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_43_II" + }, + { + "body": "The use of metal wireways shall be permitted as follows: For exposed work.In any hazardous (classified) location, as permitted by other articles in this Code.In wet locations where wireways are listed for the purpose.In concealed spaces as an extension that passes transversely through walls, if the length passing through the wall is unbroken. Access to the conductors shall be maintained on both sides of the wall. [376.10](https://2023.antflix.net#376.10)", + "displayTitle": "376.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#376.10" + }, + { + "body": "Metal wireways shall not be used in the following: Where subject to severe physical damageWhere subject to severe corrosive environments [376.12](https://2023.antflix.net#376.12)", + "displayTitle": "376.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#376.12" + }, + { + "body": "Where single conductor cables comprising each phase, neutral, or grounded conductor of an alternating-current circuit are connected in parallel as permitted in 310.10(G), the conductors shall be installed in groups consisting of not more than one conductor per phase, neutral, or grounded conductor. Informational Note: The purpose of having all parallel conductor sets within the same group is to prevent current imbalance in the paralleled conductors due to inductive reactance. [376.20](https://2023.antflix.net#376.20)", + "displayTitle": "376.20 Conductors Connected in Parallel", + "children": [], + "url": "https://2023.antflix.net#376.20" + }, + { + "body": "No conductor larger than that for which the wireway is designed shall be installed in any wireway. [376.21](https://2023.antflix.net#376.21)", + "displayTitle": "376.21 Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#376.21" + }, + { + "body": "The number of conductors or cables and their ampacity shall comply with 376.22(A) and (B). [376.22](https://2023.antflix.net#376.22)", + "displayTitle": "376.22 Number of Conductors and Ampacity", + "children": [ + { + "body": "The sum of the cross-sectional areas of all contained conductors and cables at any cross section of a wireway shall not exceed 20 percent of the interior cross-sectional area of the wireway. [376.22_(A)](https://2023.antflix.net#376.22_(A))", + "displayTitle": "(A) Cross-Sectional Areas of Wireway", + "children": [], + "url": "https://2023.antflix.net#376.22_(A)" + }, + { + "body": "The adjustment factors in 310.15(C)(1) shall be applied only where the number of current-carrying conductors, including neutral conductors classified as current-carrying under 310.15(E), exceeds 30 at any cross section of the wireway. Conductors for signaling circuits or controller conductors between a motor and its starter and used only for starting duty shall not be considered as current-carrying conductors. [376.22_(B)](https://2023.antflix.net#376.22_(B))", + "displayTitle": "(B) Adjustment Factors", + "children": [], + "url": "https://2023.antflix.net#376.22_(B)" + } + ], + "url": "https://2023.antflix.net#376.22" + }, + { + "body": "Insulated conductors installed in a metal wireway shall comply with 376.23(A) and (B). [376.23](https://2023.antflix.net#376.23)", + "displayTitle": "376.23 Insulated Conductors", + "children": [ + { + "body": "Where insulated conductors are deflected within a metal wireway, either at the ends or where conduits, fittings, or other raceways or cables enter or leave the metal wireway, or where the direction of the metal wireway is deflected greater than 30 degrees, dimensions corresponding to one wire per terminal in Table 312.6(A) shall apply. [376.23_(A)](https://2023.antflix.net#376.23_(A))", + "displayTitle": "(A) Deflected Insulated Conductors", + "children": [], + "url": "https://2023.antflix.net#376.23_(A)" + }, + { + "body": "Where insulated conductors 4 AWG or larger are pulled through a wireway, the distance between raceway and cable entries enclosing the same conductor shall not be less than that required by 314.28(A)(1) for straight pulls and 314.28(A)(2) for angle pulls. When transposing cable size into raceway size, the minimum metric designator (trade size) raceway required for the number and size of conductors in the cable shall be used. [376.23_(B)](https://2023.antflix.net#376.23_(B))", + "displayTitle": "(B) Metal Wireways Used as Pull Boxes", + "children": [], + "url": "https://2023.antflix.net#376.23_(B)" + } + ], + "url": "https://2023.antflix.net#376.23" + }, + { + "body": "Metal wireways shall be supported in accordance with 376.30(A) and (B). [376.30](https://2023.antflix.net#376.30)", + "displayTitle": "376.30 Securing and Supporting", + "children": [ + { + "body": "Wireways shall be supported where run horizontally at each end and at intervals not to exceed 1.5 m (5 ft) or for individual lengths longer than 1.5 m (5 ft) at each end or joint, unless listed for other support intervals. The distance between supports shall not exceed 3 m (10 ft). [376.30_(A)](https://2023.antflix.net#376.30_(A))", + "displayTitle": "(A) Horizontal Support", + "children": [], + "url": "https://2023.antflix.net#376.30_(A)" + }, + { + "body": "Vertical runs of wireways shall be securely supported at intervals not exceeding 4.5 m (15 ft) and shall not have more than one joint between supports. Adjoining wireway sections shall be securely fastened together to provide a rigid joint. [376.30_(B)](https://2023.antflix.net#376.30_(B))", + "displayTitle": "(B) Vertical Support", + "children": [], + "url": "https://2023.antflix.net#376.30_(B)" + } + ], + "url": "https://2023.antflix.net#376.30" + }, + { + "displayTitle": "376.56 Splices, Taps, and Power Distribution Blocks", + "children": [ + { + "body": "Splices and taps shall be permitted within a wireway, provided they are accessible. The conductors, including splices and taps, shall not fill the wireway to more than 75 percent of its area at that point. [376.56_(A)](https://2023.antflix.net#376.56_(A))", + "displayTitle": "(A) Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#376.56_(A)" + }, + { + "displayTitle": "(B) Power Distribution Blocks", + "children": [ + { + "body": "Power distribution blocks installed in metal wireways shall be listed. Power distribution blocks installed on the line side of the service equipment shall be marked \"suitable for use on the line side of service equipment\" or equivalent. [376.56_(B)_(1)](https://2023.antflix.net#376.56_(B)_(1))", + "displayTitle": "(1) Installation", + "children": [], + "url": "https://2023.antflix.net#376.56_(B)_(1)" + }, + { + "body": "In addition to the wiring space requirement in 376.56(A), the power distribution block shall be installed in a wireway with dimensions not smaller than specified in the installation instructions of the power distribution block. [376.56_(B)_(2)](https://2023.antflix.net#376.56_(B)_(2))", + "displayTitle": "(2) Size of Enclosure", + "children": [], + "url": "https://2023.antflix.net#376.56_(B)_(2)" + }, + { + "body": "Wire bending space at the terminals of power distribution blocks shall comply with 312.6(B). [376.56_(B)_(3)](https://2023.antflix.net#376.56_(B)_(3))", + "displayTitle": "(3) Wire Bending Space", + "children": [], + "url": "https://2023.antflix.net#376.56_(B)_(3)" + }, + { + "body": "Power distribution blocks shall not have uninsulated live parts exposed within a wireway, whether or not the wireway cover is installed. [376.56_(B)_(4)](https://2023.antflix.net#376.56_(B)_(4))", + "displayTitle": "(4) Live Parts", + "children": [], + "url": "https://2023.antflix.net#376.56_(B)_(4)" + }, + { + "body": "Conductors shall be arranged so the power distribution block terminals are unobstructed following installation. [376.56_(B)_(5)](https://2023.antflix.net#376.56_(B)_(5))", + "displayTitle": "(5) Conductors", + "children": [], + "url": "https://2023.antflix.net#376.56_(B)_(5)" + } + ], + "url": "https://2023.antflix.net#376.56_(B)" + } + ], + "url": "https://2023.antflix.net#376.56" + }, + { + "body": "Dead ends of metal wireways shall be closed. [376.58](https://2023.antflix.net#376.58)", + "displayTitle": "376.58 Dead Ends", + "children": [], + "url": "https://2023.antflix.net#376.58" + }, + { + "body": "Listed metal wireway shall be permitted as an equipment grounding conductor in accordance with 250.118(A)(13). [376.60](https://2023.antflix.net#376.60)", + "displayTitle": "376.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#376.60" + }, + { + "body": "Extensions from wireways shall be made with cord pendants installed in accordance with 400.14 or with any wiring method in Chapter 3 that includes a means for equipment grounding. Where a separate equipment grounding conductor is employed, connection of the equipment grounding conductors in the wiring method to the wireway shall comply with 250.8 and 250.12. [376.70](https://2023.antflix.net#376.70)", + "displayTitle": "376.70 Extensions From Metal Wireways", + "children": [], + "url": "https://2023.antflix.net#376.70" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_39_III" + }, + { + "displayTitle": "376.100 Construction", + "children": [ + { + "body": "Wireways shall be constructed and installed so that electrical and mechanical continuity of the complete system are assured. [376.100_(A)](https://2023.antflix.net#376.100_(A))", + "displayTitle": "(A) Electrical and Mechanical Continuity", + "children": [], + "url": "https://2023.antflix.net#376.100_(A)" + }, + { + "body": "Wireways shall be of substantial construction and shall provide a complete enclosure for the contained conductors. All surfaces, both interior and exterior, shall be suitably protected from corrosion. Corner joints shall be made tight, and where the assembly is held together by rivets, bolts, or screws, such fasteners shall be spaced not more than 300 mm (12 in.) apart. [376.100_(B)](https://2023.antflix.net#376.100_(B))", + "displayTitle": "(B) Substantial Construction", + "children": [], + "url": "https://2023.antflix.net#376.100_(B)" + }, + { + "body": "Suitable bushings, shields, or fittings having smooth, rounded edges shall be provided where conductors pass between wireways, through partitions, around bends, between wireways and cabinets or junction boxes, and at other locations where necessary to prevent abrasion of the insulation of the conductors. [376.100_(C)](https://2023.antflix.net#376.100_(C))", + "displayTitle": "(C) Smooth Rounded Edges", + "children": [], + "url": "https://2023.antflix.net#376.100_(C)" + }, + { + "body": "Covers shall be securely fastened to the wireway. [376.100_(D)](https://2023.antflix.net#376.100_(D))", + "displayTitle": "(D) Covers", + "children": [], + "url": "https://2023.antflix.net#376.100_(D)" + } + ], + "url": "https://2023.antflix.net#376.100" + }, + { + "body": "Metal wireways shall be so marked that their manufacturer's name or trademark will be visible after installation. [376.120](https://2023.antflix.net#376.120)", + "displayTitle": "376.120 Marking", + "children": [], + "url": "https://2023.antflix.net#376.120" + } + ], + "url": "https://2023.antflix.net#376" + }, + { + "displayTitle": "Article 378 Nonmetallic Wireways", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_44_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for nonmetallic wireways and associated fittings. [378.1](https://2023.antflix.net#378.1)", + "displayTitle": "378.1 Scope", + "children": [], + "url": "https://2023.antflix.net#378.1" + }, + { + "body": "Nonmetallic wireways and associated fittings shall be listed. [378.6](https://2023.antflix.net#378.6)", + "displayTitle": "378.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#378.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_44_II" + }, + { + "body": "The use of nonmetallic wireways shall be permitted in the following:\n\nOnly for exposed work, except as permitted in 378.10(4).\nWhere subject to corrosive environments where identified for the use.\n\nIn wet locations where listed for the purpose.\nInformational Note: Extreme cold may cause nonmetallic wireways to become brittle and therefore more susceptible to damage from physical contact.\n\nAs extensions to pass transversely through walls if the length passing through the wall is unbroken. Access to the conductors shall be maintained on both sides of the wall.\n [378.10](https://2023.antflix.net#378.10)", + "displayTitle": "378.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#378.10" + }, + { + "body": "Nonmetallic wireways shall not be used in the following: Where subject to physical damageIn any hazardous (classified) location, except as permitted by other articles in this CodeWhere exposed to sunlight unless listed and marked as suitable for the purposeWhere subject to ambient temperatures other than those for which nonmetallic wireway is listedFor conductors whose insulation temperature limitations would exceed those for which the nonmetallic wireway is listed [378.12](https://2023.antflix.net#378.12)", + "displayTitle": "378.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#378.12" + }, + { + "body": "Where single conductor cables comprising each phase, neutral, or grounded conductor of an alternating-current circuit are connected in parallel as permitted in 310.10(G), the conductors shall be installed in groups consisting of not more than one conductor per phase, neutral, or grounded conductor to prevent current imbalance in the paralleled conductors due to inductive reactance. [378.20](https://2023.antflix.net#378.20)", + "displayTitle": "378.20 Conductors Connected in Parallel", + "children": [], + "url": "https://2023.antflix.net#378.20" + }, + { + "body": "No conductor larger than that for which the nonmetallic wireway is designed shall be installed in any nonmetallic wireway. [378.21](https://2023.antflix.net#378.21)", + "displayTitle": "378.21 Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#378.21" + }, + { + "body": "The sum of cross-sectional areas of all contained conductors or cables at any cross section of the nonmetallic wireway shall not exceed 20 percent of the interior cross-sectional area of the nonmetallic wireway. Conductors for signaling circuits or controller conductors between a motor and its starter and used only for starting duty shall not be considered as current-carrying conductors. The adjustment factors specified in 310.15(C)(1) shall be applicable to the current-carrying conductors up to and including the 20 percent fill specified in the first paragraph of this section. [378.22](https://2023.antflix.net#378.22)", + "displayTitle": "378.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#378.22" + }, + { + "body": "Insulated conductors installed in a nonmetallic wireway shall comply with 378.23(A) and (B). [378.23](https://2023.antflix.net#378.23)", + "displayTitle": "378.23 Insulated Conductors", + "children": [ + { + "body": "Where insulated conductors are deflected within a nonmetallic wireway, either at the ends or where conduits, fittings, or other raceways or cables enter or leave the nonmetallic wireway, or where the direction of the nonmetallic wireway is deflected greater than 30 degrees, dimensions corresponding to one wire per terminal in Table 312.6(A) shall apply. [378.23_(A)](https://2023.antflix.net#378.23_(A))", + "displayTitle": "(A) Deflected Insulated Conductors", + "children": [], + "url": "https://2023.antflix.net#378.23_(A)" + }, + { + "body": "Where insulated conductors 4 AWG or larger are pulled through a wireway, the distance between raceway and cable entries enclosing the same conductor shall not be less than that required in 314.28(A)(1) for straight pulls and in 314.28(A)(2) for angle pulls. When transposing cable size into raceway size, the minimum metric designator (trade size) raceway required for the number and size of conductors in the cable shall be used. [378.23_(B)](https://2023.antflix.net#378.23_(B))", + "displayTitle": "(B) Nonmetallic Wireways Used as Pull Boxes", + "children": [], + "url": "https://2023.antflix.net#378.23_(B)" + } + ], + "url": "https://2023.antflix.net#378.23" + }, + { + "body": "Nonmetallic wireway shall be supported in accordance with 378.30(A) and (B). [378.30](https://2023.antflix.net#378.30)", + "displayTitle": "378.30 Securing and Supporting", + "children": [ + { + "body": "Nonmetallic wireways shall be supported where run horizontally at intervals not to exceed 900 mm (3 ft), and at each end or joint, unless listed for other support intervals. In no case shall the distance between supports exceed 3 m (10 ft). [378.30_(A)](https://2023.antflix.net#378.30_(A))", + "displayTitle": "(A) Horizontal Support", + "children": [], + "url": "https://2023.antflix.net#378.30_(A)" + }, + { + "body": "Vertical runs of nonmetallic wireway shall be securely supported at intervals not exceeding 1.2 m (4 ft), unless listed for other support intervals, and shall not have more than one joint between supports. Adjoining nonmetallic wireway sections shall be securely fastened together to provide a rigid joint. [378.30_(B)](https://2023.antflix.net#378.30_(B))", + "displayTitle": "(B) Vertical Support", + "children": [], + "url": "https://2023.antflix.net#378.30_(B)" + } + ], + "url": "https://2023.antflix.net#378.30" + }, + { + "body": "Expansion fittings for nonmetallic wireway shall be provided to compensate for thermal expansion and contraction where the length change is expected to be 6 mm (0.25 in.) or greater in a straight run. Informational Note: See Table 352.44(A) for expansion characteristics of PVC conduit. The expansion characteristics of PVC nonmetallic wireway are identical. [378.44](https://2023.antflix.net#378.44)", + "displayTitle": "378.44 Expansion Fittings", + "children": [], + "url": "https://2023.antflix.net#378.44" + }, + { + "body": "Splices and taps shall be permitted within a nonmetallic wireway, provided they are accessible. The conductors, including splices and taps, shall not fill the nonmetallic wireway to more than 75 percent of its area at that point. [378.56](https://2023.antflix.net#378.56)", + "displayTitle": "378.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#378.56" + }, + { + "body": "Dead ends of nonmetallic wireway shall be closed using listed fittings. [378.58](https://2023.antflix.net#378.58)", + "displayTitle": "378.58 Dead Ends", + "children": [], + "url": "https://2023.antflix.net#378.58" + }, + { + "body": "Where equipment grounding is required, a separate grounding conductor shall be installed in the nonmetallic wireway. A separate equipment grounding conductor shall not be required where the grounded conductor is used to ground equipment as permitted in 250.142. [378.60](https://2023.antflix.net#378.60)", + "displayTitle": "378.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#378.60" + }, + { + "body": "Extensions from nonmetallic wireway shall be made with cord pendants or any wiring method of Chapter 3. A separate equipment grounding conductor shall be installed in, or an equipment grounding connection shall be made to, any of the wiring methods used for the extension. [378.70](https://2023.antflix.net#378.70)", + "displayTitle": "378.70 Extensions From Nonmetallic Wireways", + "children": [], + "url": "https://2023.antflix.net#378.70" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_40_III" + }, + { + "body": "Nonmetallic wireways shall be marked so that the manufacturer's name or trademark and interior cross-sectional area in square inches shall be visible after installation. Marking for limited smoke shall be permitted on the nonmetallic wireways that have limited smoke-producing characteristics. [378.120](https://2023.antflix.net#378.120)", + "displayTitle": "378.120 Marking", + "children": [], + "url": "https://2023.antflix.net#378.120" + } + ], + "url": "https://2023.antflix.net#378" + }, + { + "displayTitle": "Article 380 Multioutlet Assembly", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_45_I" + }, + { + "body": "This article covers the use and installation requirements for multioutlet assemblies. Informational Note: See Article 100 for the definition of multioutlet assembly. [380.1](https://2023.antflix.net#380.1)", + "displayTitle": "380.1 Scope", + "children": [], + "url": "https://2023.antflix.net#380.1" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_45_II" + }, + { + "body": "The use of a multioutlet assembly shall be permitted in dry locations. [380.10](https://2023.antflix.net#380.10)", + "displayTitle": "380.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#380.10" + }, + { + "body": "A multioutlet assembly shall not be installed as follows: Where concealed, except that it shall be permissible to surround the back and sides of a metal multioutlet assembly by the building finish or recess a nonmetallic multioutlet assembly in a baseboardWhere subject to severe physical damageWhere the voltage is 300 volts or more between conductors unless the assembly is of metal having a thickness of not less than 1.02 mm (0.040 in.)Where subject to corrosive vaporsIn hoistwaysIn any hazardous (classified) location, except as permitted by other articles in this CodeWhere cord and plug connected [380.12](https://2023.antflix.net#380.12)", + "displayTitle": "380.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#380.12" + }, + { + "body": "For field-assembled multioutlet assemblies, insulated conductors shall comply with 380.23(A) and (B), as applicable. [380.23](https://2023.antflix.net#380.23)", + "displayTitle": "380.23 Insulated Conductors", + "children": [ + { + "body": "Where insulated conductors are deflected within a multioutlet assembly, either at the ends or where conduits, fittings, or other raceways or cables enter or leave the multioutlet assembly, or where the direction of the multioutlet assembly is deflected greater than 30 degrees, dimensions corresponding to one wire per terminal in Table 312.6(A) shall apply. [380.23_(A)](https://2023.antflix.net#380.23_(A))", + "displayTitle": "(A) Deflected Insulated Conductors", + "children": [], + "url": "https://2023.antflix.net#380.23_(A)" + }, + { + "body": "Where insulated conductors 4 AWG or larger are pulled through a multioutlet assembly, the distance between raceway and cable entries enclosing the same conductor shall not be less than that required by 314.28(A)(1) for straight pulls and 314.28(A)(2) for angle pulls. When transposing cable size into raceway size, the minimum metric designator (trade size) raceway required for the number and size of conductors in the cable shall be used. [380.23_(B)](https://2023.antflix.net#380.23_(B))", + "displayTitle": "(B) Multioutlet Assemblies Used as Pull Boxes", + "children": [], + "url": "https://2023.antflix.net#380.23_(B)" + } + ], + "url": "https://2023.antflix.net#380.23" + }, + { + "body": "It shall be permissible to extend a metal multioutlet assembly through (not run within) dry partitions if arrangements are made for removing the cap or cover on all exposed portions and no outlet is located within the partitions. [380.76](https://2023.antflix.net#380.76)", + "displayTitle": "380.76 Metal Multioutlet Assembly Through Dry Partitions", + "children": [], + "url": "https://2023.antflix.net#380.76" + } + ], + "url": "https://2023.antflix.net#380" + }, + { + "displayTitle": "Article 382 Nonmetallic Extensions", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_46_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for nonmetallic extensions. [382.1](https://2023.antflix.net#382.1)", + "displayTitle": "382.1 Scope", + "children": [], + "url": "https://2023.antflix.net#382.1" + }, + { + "body": "Concealable nonmetallic extensions and associated fittings and devices shall be listed. The starting/source tap device for the extension shall contain and provide the following protection for all load-side extensions and devices: Supplementary overcurrent protectionLevel of protection equivalent to a Class A GFCILevel of protection equivalent to a portable GFCILine and load-side miswire protectionProvide protection from the effects of arc faults [382.6](https://2023.antflix.net#382.6)", + "displayTitle": "382.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#382.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_46_II" + }, + { + "body": "Nonmetallic extensions shall be permitted only in accordance with 382.10(A), (B), and (C). [382.10](https://2023.antflix.net#382.10)", + "displayTitle": "382.10 Uses Permitted", + "children": [ + { + "body": "The extension shall be from an existing outlet on a 15- or 20-ampere branch circuit. Where a concealable nonmetallic extension originates from a nongrounding-type receptacle, the installation shall comply with 250.130(C), 406.4(D)(2)(b), or 406.4(D)(2)(c). [382.10_(A)](https://2023.antflix.net#382.10_(A))", + "displayTitle": "(A) From an Existing Outlet", + "children": [], + "url": "https://2023.antflix.net#382.10_(A)" + }, + { + "body": "The extension shall be run exposed, or concealed as permitted in 382.15, and in a dry location. [382.10_(B)](https://2023.antflix.net#382.10_(B))", + "displayTitle": "(B) Exposed and in a Dry Location", + "children": [], + "url": "https://2023.antflix.net#382.10_(B)" + }, + { + "body": "For nonmetallic surface extensions mounted directly on the surface of walls or ceilings, the building shall be occupied for residential or office purposes and shall not exceed three floors above grade. Where identified for the use, concealable nonmetallic extensions shall be permitted more than three floors above grade. Informational Note No. 1: See 310.14(A)(3) for temperature limitation of conductors. Informational Note No. 2: See 362.10 for definition of First Floor. [382.10_(C)](https://2023.antflix.net#382.10_(C))", + "displayTitle": "(C) Residential or Offices", + "children": [], + "url": "https://2023.antflix.net#382.10_(C)" + } + ], + "url": "https://2023.antflix.net#382.10" + }, + { + "body": "Nonmetallic extensions shall not be used as follows: In unfinished basements, attics, or roof spacesWhere the voltage between conductors exceeds 150 volts for nonmetallic surface extensions and 300 volts for aerial cableWhere subject to corrosive vaporsWhere run through a floor or partition, or outside the room in which it originates [382.12](https://2023.antflix.net#382.12)", + "displayTitle": "382.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#382.12" + }, + { + "displayTitle": "382.15 Exposed", + "children": [ + { + "body": "One or more extensions shall be permitted to be run in any direction from an existing outlet, but not on the floor or within 50 mm (2 in.) from the floor. [382.15_(A)](https://2023.antflix.net#382.15_(A))", + "displayTitle": "(A) Nonmetallic Extensions", + "children": [], + "url": "https://2023.antflix.net#382.15_(A)" + }, + { + "body": "Where identified for the use, nonmetallic extensions shall be permitted to be concealed with paint, texture, concealing compound, plaster, wallpaper, tile, wall paneling, or other similar materials and installed in accordance with 382.15(A). [382.15_(B)](https://2023.antflix.net#382.15_(B))", + "displayTitle": "(B) Concealable Nonmetallic Extensions", + "children": [], + "url": "https://2023.antflix.net#382.15_(B)" + } + ], + "url": "https://2023.antflix.net#382.15" + }, + { + "displayTitle": "382.24 Bends", + "children": [ + { + "body": "A bend that reduces the normal spacing between the conductors shall be covered with a cap to protect the assembly from physical damage. [382.24_(A)](https://2023.antflix.net#382.24_(A))", + "displayTitle": "(A) Nonmetallic Extensions", + "children": [], + "url": "https://2023.antflix.net#382.24_(A)" + }, + { + "body": "Concealable extensions shall be permitted to be folded back over themselves and flattened as required for installation. [382.24_(B)](https://2023.antflix.net#382.24_(B))", + "displayTitle": "(B) Concealable Nonmetallic Extensions", + "children": [], + "url": "https://2023.antflix.net#382.24_(B)" + } + ], + "url": "https://2023.antflix.net#382.24" + }, + { + "displayTitle": "382.30 Securing and Supporting", + "children": [ + { + "body": "Nonmetallic surface extensions shall be secured in place by approved means at intervals not exceeding 200 mm (8 in.), with an allowance for 300 mm (12 in.) to the first fastening where the connection to the supplying outlet is by means of an attachment plug. There shall be at least one fastening between each two adjacent outlets supplied. An extension shall be attached to only woodwork or plaster finish and shall not be in contact with any metal work or other conductive material other than with metal plates on receptacles. [382.30_(A)](https://2023.antflix.net#382.30_(A))", + "displayTitle": "(A) Nonmetallic Extensions", + "children": [], + "url": "https://2023.antflix.net#382.30_(A)" + }, + { + "body": "All surface-mounted concealable nonmetallic extension components shall be firmly anchored to the wall or ceiling using an adhesive or mechanical anchoring system identified for this use. [382.30_(B)](https://2023.antflix.net#382.30_(B))", + "displayTitle": "(B) Concealable Nonmetallic Extensions", + "children": [], + "url": "https://2023.antflix.net#382.30_(B)" + } + ], + "url": "https://2023.antflix.net#382.30" + }, + { + "body": "Each run shall terminate in a fitting, connector, or box that covers the end of the assembly. All fittings, connectors, and devices shall be of a type identified for the use. [382.40](https://2023.antflix.net#382.40)", + "displayTitle": "382.40 Boxes and Fittings", + "children": [], + "url": "https://2023.antflix.net#382.40" + }, + { + "displayTitle": "382.42 Devices", + "children": [ + { + "body": "All receptacles, receptacle housings, and self-contained devices used with concealable nonmetallic extensions shall be identified for this use. [382.42_(A)](https://2023.antflix.net#382.42_(A))", + "displayTitle": "(A) Receptacles", + "children": [], + "url": "https://2023.antflix.net#382.42_(A)" + }, + { + "body": "Receptacle housings and self-contained devices designed either for surface or for recessed mounting shall be permitted for use with concealable nonmetallic extensions. Receptacle housings and self-contained devices shall incorporate means for facilitating entry and termination of concealable nonmetallic extensions and for electrically connecting the housing or device. Receptacle and self-contained devices shall comply with 406.4. Power and communications outlets installed together in common housing shall be permitted in accordance with 800.133(A)(3), Exception No. 2. [382.42_(B)](https://2023.antflix.net#382.42_(B))", + "displayTitle": "(B) Receptacles and Housings", + "children": [], + "url": "https://2023.antflix.net#382.42_(B)" + } + ], + "url": "https://2023.antflix.net#382.42" + }, + { + "body": "Extensions shall consist of a continuous unbroken length of the assembly, without splices, and without exposed conductors between fittings, connectors, or devices. Taps shall be permitted where approved fittings completely covering the tap connections are used. Aerial cable and its tap connectors shall be provided with an approved means for polarization. Receptacle-type tap connectors shall be of the locking type. [382.56](https://2023.antflix.net#382.56)", + "displayTitle": "382.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#382.56" + }, + { + "displayTitle": "Part III Construction Specifications (Concealable Nonmetallic Extensions Only)", + "children": [], + "url": "https://2023.antflix.net#divider_41_III" + }, + { + "body": "Concealable nonmetallic extensions shall be of a multilayer flat conductor design consisting of a center ungrounded conductor enclosed by a sectioned grounded conductor and an overall sectioned equipment grounding conductor. [382.100](https://2023.antflix.net#382.100)", + "displayTitle": "382.100 Construction", + "children": [], + "url": "https://2023.antflix.net#382.100" + }, + { + "body": "Concealable nonmetallic extensions shall be constructed, using flat copper conductors equivalent to 14 AWG or 12 AWG conductor sizes, and constructed per 382.104(A), (B), and (C). [382.104](https://2023.antflix.net#382.104)", + "displayTitle": "382.104 Flat Conductors", + "children": [ + { + "body": "The ungrounded conductor shall consist of one or more ungrounded flat conductor(s) enclosed in accordance with 382.104(B) and (C) and identified in accordance with 310.6(C). [382.104_(A)](https://2023.antflix.net#382.104_(A))", + "displayTitle": "(A) Ungrounded Conductor (Center Layer)", + "children": [], + "url": "https://2023.antflix.net#382.104_(A)" + }, + { + "body": "The grounded conductor shall consist of two sectioned inner flat conductors that enclose the center ungrounded conductor(s). The sectioned grounded conductor shall be enclosed by the sectioned equipment grounding conductor and identified in accordance with 200.6. [382.104_(B)](https://2023.antflix.net#382.104_(B))", + "displayTitle": "(B) Grounded Conductor (Inner Sectioned Layers)", + "children": [], + "url": "https://2023.antflix.net#382.104_(B)" + }, + { + "body": "The equipment grounding conductor shall consist of two overall sectioned conductors that enclose the grounded conductor and ungrounded conductor(s) and shall comply with 250.4(A)(5). The equipment grounding conductor layers shall be identified by any one of the following methods: As permitted in 250.119A clear coveringOne or more continuous green stripes or hash marksThe term \"Equipment Grounding Conductor\" printed at regular intervals throughout the cable [382.104_(C)](https://2023.antflix.net#382.104_(C))", + "displayTitle": "(C) Equipment Grounding Conductor (Outer Sectioned Layers)", + "children": [], + "url": "https://2023.antflix.net#382.104_(C)" + } + ], + "url": "https://2023.antflix.net#382.104" + }, + { + "body": "The ungrounded and grounded flat conductor layers shall be individually insulated and comply with 310.14(A)(3). The equipment grounding conductor shall be covered or insulated. [382.112](https://2023.antflix.net#382.112)", + "displayTitle": "382.112 Insulation", + "children": [], + "url": "https://2023.antflix.net#382.112" + }, + { + "displayTitle": "382.120 Marking", + "children": [ + { + "body": "Concealable nonmetallic extensions shall be clearly and durably marked on both sides at intervals of not more than 610 mm (24 in.) with the information required by 310.8(A) and with the following additional information: Material of conductorsMaximum temperature ratingAmpacity [382.120_(A)](https://2023.antflix.net#382.120_(A))", + "displayTitle": "(A) Cable", + "children": [], + "url": "https://2023.antflix.net#382.120_(A)" + }, + { + "body": "Conductors shall be clearly and durably identified on both sides throughout their length as specified in 382.104. [382.120_(B)](https://2023.antflix.net#382.120_(B))", + "displayTitle": "(B) Conductor Identification", + "children": [], + "url": "https://2023.antflix.net#382.120_(B)" + } + ], + "url": "https://2023.antflix.net#382.120" + } + ], + "url": "https://2023.antflix.net#382" + }, + { + "displayTitle": "Article 384 Strut-Type Channel Raceway", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_47_I" + }, + { + "body": "This article covers the use, installation, and construction specifications of strut-type channel raceway. [384.1](https://2023.antflix.net#384.1)", + "displayTitle": "384.1 Scope", + "children": [], + "url": "https://2023.antflix.net#384.1" + }, + { + "body": "Strut-type channel raceways and accessories shall be listed and identified for such use. [384.6](https://2023.antflix.net#384.6)", + "displayTitle": "384.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#384.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_47_II" + }, + { + "body": "The use of strut-type channel raceways shall be permitted in the following: Where exposed.In dry locations.In locations subject to corrosive vapors where protected by finishes approved for the condition.As power poles.In hazardous (classified) locations as permitted in Chapter 5.As extensions of unbroken lengths through walls, partitions, and floors where closure strips are removable from either side and the portion within the wall, partition, or floor remains covered.Ferrous channel raceways and fittings protected from corrosion solely by enamel shall be permitted only indoors. [384.10](https://2023.antflix.net#384.10)", + "displayTitle": "384.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#384.10" + }, + { + "body": "Strut-type channel raceways shall not be used as follows: Where concealed.Ferrous channel raceways and fittings protected from corrosion solely by enamel shall not be permitted where subject to severe corrosive influences. [384.12](https://2023.antflix.net#384.12)", + "displayTitle": "384.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#384.12" + }, + { + "body": "No conductor larger than that for which the raceway is listed shall be installed in strut-type channel raceways. [384.21](https://2023.antflix.net#384.21)", + "displayTitle": "384.21 Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#384.21" + }, + { + "body": "The number of conductors or cables permitted in strut-type channel raceways shall not exceed the percentage fill using Table 384.22 and applicable cross-sectional area of specific types and sizes of wire given in the tables in Chapter 9. The adjustment factors of 310.15(C)(1) shall not apply to conductors installed in strut-type channel raceways where all of the following conditions are met:The cross-sectional area of the raceway exceeds 2500 mm2 (4 in.2).The current-carrying conductors do not exceed 30 in number.The sum of the cross-sectional areas of all contained conductors does not exceed 20 percent of the interior cross-sectional area of the strut-type channel raceways.Table 384.22 Channel Size and Inside Cross-Sectional Area Size Channel Area 40% Area* 25% Area\u2020 in.2 mm2 in.2 mm2 in.2 mm2 15/8 \u00d7 15/16 0.887 572 0.355 229 0.222 143 15/8 \u00d7 1 1.151 743 0.460 297 0.288 186 15/8 \u00d7 13/8 1.677 1076 0.671 433 0.419 270 15/8 \u00d7 15/8 2.028 1308 0.811 523 0.507 327 15/8 \u00d7 27/16 3.169 2045 1.267 817 0.792 511 15/8 \u00d7 31/4 4.308 2780 1.723 1112 1.077 695 11/2 \u00d7 3/4 0.849 548 0.340 219 0.212 137 11/2 \u00d7 11/2 1.828 1179 0.731 472 0.457 295 11/2 \u00d7 17/8 2.301 1485 0.920 594 0.575 371 11/2 \u00d7 3 3.854 2487 1.542 995 0.964 622 *Raceways with external joiners shall use a 40 percent wire fill calculation to determine the number of conductors permitted.\u2020Raceways with internal joiners shall use a 25 percent wire fill calculation to determine the number of conductors permitted. [384.22](https://2023.antflix.net#384.22)", + "displayTitle": "384.22 Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#384.22" + }, + { + "displayTitle": "384.30 Securing and Supporting", + "children": [ + { + "body": "A surface mount strut-type channel raceway shall be secured to the mounting surface with retention straps external to the channel at intervals not exceeding 3 m (10 ft) and within 900 mm (3 ft) of each outlet box, cabinet, junction box, or other channel raceway termination. [384.30_(A)](https://2023.antflix.net#384.30_(A))", + "displayTitle": "(A) Surface Mount", + "children": [], + "url": "https://2023.antflix.net#384.30_(A)" + }, + { + "body": "Strut-type channel raceways shall be permitted to be suspension mounted in air with identified methods at intervals not to exceed 3 m (10 ft) and within 900 mm (3 ft) of channel raceway terminations and ends. [384.30_(B)](https://2023.antflix.net#384.30_(B))", + "displayTitle": "(B) Suspension Mount", + "children": [], + "url": "https://2023.antflix.net#384.30_(B)" + } + ], + "url": "https://2023.antflix.net#384.30" + }, + { + "body": "Splices and taps shall be permitted in raceways that are accessible after installation by having a removable cover. The conductors, including splices and taps, shall not fill the raceway to more than 75 percent of its area at that point. All splices and taps shall be made by approved methods. [384.56](https://2023.antflix.net#384.56)", + "displayTitle": "384.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#384.56" + }, + { + "body": "Strut-type channel raceway enclosures providing a transition to or from other wiring methods shall have a means for connecting an equipment grounding conductor. Strut-type channel raceways shall be permitted as an equipment grounding conductor in accordance with 250.118(A)(13). Where a snap-fit metal cover for strut-type channel raceways is used to achieve electrical continuity in accordance with the listing, this cover shall not be permitted as the means for providing electrical continuity for a receptacle mounted in the cover. [384.60](https://2023.antflix.net#384.60)", + "displayTitle": "384.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#384.60" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_42_III" + }, + { + "body": "Strut-type channel raceways and their accessories shall be of a construction that distinguishes them from other raceways. Raceways and their elbows, couplings, and other fittings shall be designed such that the sections can be electrically and mechanically coupled together and installed without subjecting the wires to abrasion. They shall comply with 384.100(A), (B), and (C). [384.100](https://2023.antflix.net#384.100)", + "displayTitle": "384.100 Construction", + "children": [ + { + "body": "Raceways and accessories shall be formed of steel, stainless steel, or aluminum. [384.100_(A)](https://2023.antflix.net#384.100_(A))", + "displayTitle": "(A) Material", + "children": [], + "url": "https://2023.antflix.net#384.100_(A)" + }, + { + "body": "Steel raceways and accessories shall be protected against corrosion by galvanizing or by an organic coating. Informational Note: Enamel and PVC coatings are examples of organic coatings that provide corrosion protection. [384.100_(B)](https://2023.antflix.net#384.100_(B))", + "displayTitle": "(B) Corrosion Protection", + "children": [], + "url": "https://2023.antflix.net#384.100_(B)" + }, + { + "body": "Covers of strut-type channel raceways shall be either metal or nonmetallic. [384.100_(C)](https://2023.antflix.net#384.100_(C))", + "displayTitle": "(C) Cover", + "children": [], + "url": "https://2023.antflix.net#384.100_(C)" + } + ], + "url": "https://2023.antflix.net#384.100" + }, + { + "body": "Each length of strut-type channel raceway shall be clearly and durably identified as required in the first sentence of 110.21 (A). [384.120](https://2023.antflix.net#384.120)", + "displayTitle": "384.120 Marking", + "children": [], + "url": "https://2023.antflix.net#384.120" + } + ], + "url": "https://2023.antflix.net#384" + }, + { + "displayTitle": "Article 386 Surface Metal Raceways", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_48_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for surface metal raceways and associated fittings. [386.1](https://2023.antflix.net#386.1)", + "displayTitle": "386.1 Scope", + "children": [], + "url": "https://2023.antflix.net#386.1" + }, + { + "body": "Surface metal raceway and associated fittings shall be listed. [386.6](https://2023.antflix.net#386.6)", + "displayTitle": "386.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#386.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_48_II" + }, + { + "body": "The use of surface metal raceways shall be permitted in the following: In dry locations.In Class I, Division 2 hazardous (classified) locations as permitted in 501.10(B)(3).Under raised floors, as permitted in 645.5(E)(2).Extension through walls and floors. Surface metal raceway shall be permitted to pass transversely through dry walls, dry partitions, and dry floors if the length passing through is unbroken. Access to the conductors shall be maintained on both sides of the wall, partition, or floor. [386.10](https://2023.antflix.net#386.10)", + "displayTitle": "386.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#386.10" + }, + { + "body": "Surface metal raceways shall not be used in the following: Where subject to severe physical damage, unless otherwise approvedWhere the voltage is 300 volts or more between conductors, unless the metal has a thickness of not less than 1.02 mm (0.040 in.) nominalWhere subject to corrosive vaporsIn hoistwaysWhere concealed, except as permitted in 386.10 [386.12](https://2023.antflix.net#386.12)", + "displayTitle": "386.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#386.12" + }, + { + "body": "No conductor larger than that for which the raceway is designed shall be installed in surface metal raceway. [386.21](https://2023.antflix.net#386.21)", + "displayTitle": "386.21 Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#386.21" + }, + { + "body": "The number of conductors or cables installed in surface metal raceway shall not be greater than the number for which the raceway is designed. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The adjustment factors of 310.15(C)(1) shall not apply to conductors installed in surface metal raceways where all of the following conditions are met:The cross-sectional area of the raceway exceeds 2500 mm2 (4 in.2).The current-carrying conductors do not exceed 30 in number.The sum of the cross-sectional areas of all contained conductors does not exceed 20 percent of the interior cross-sectional area of the surface metal raceway. [386.22](https://2023.antflix.net#386.22)", + "displayTitle": "386.22 Number of Conductors or Cables", + "children": [], + "url": "https://2023.antflix.net#386.22" + }, + { + "body": "Surface metal raceways and associated fittings shall be supported in accordance with the manufacturer's installation instructions. [386.30](https://2023.antflix.net#386.30)", + "displayTitle": "386.30 Securing and Supporting", + "children": [], + "url": "https://2023.antflix.net#386.30" + }, + { + "body": "Splices and taps shall be permitted in surface metal raceways having a removable cover that is accessible after installation. The conductors, including splices and taps, shall not fill the raceway to more than 75 percent of its area at that point. Splices and taps in surface metal raceways without removable covers shall be made only in boxes. All splices and taps shall be made by approved methods. Taps of Type FC cable installed in surface metal raceway shall be made in accordance with 322.56(B). [386.56](https://2023.antflix.net#386.56)", + "displayTitle": "386.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#386.56" + }, + { + "body": "Surface metal raceway enclosures providing a transition from other wiring methods shall have a means for connecting an equipment grounding conductor. [386.60](https://2023.antflix.net#386.60)", + "displayTitle": "386.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#386.60" + }, + { + "body": "When combination surface metal raceways are used for both signaling and for lighting and power circuits, the different systems shall be run in separate compartments identified by stamping, imprinting, or color coding of the interior finish. [386.70](https://2023.antflix.net#386.70)", + "displayTitle": "386.70 Combination Raceways", + "children": [], + "url": "https://2023.antflix.net#386.70" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_43_III" + }, + { + "body": "Surface metal raceways shall be of such construction as will distinguish them from other raceways. Surface metal raceways and their elbows, couplings, and similar fittings shall be designed so that the sections can be electrically and mechanically coupled together and installed without subjecting the wires to abrasion. Where covers and accessories of nonmetallic materials are used on surface metal raceways, they shall be identified for such use. [386.100](https://2023.antflix.net#386.100)", + "displayTitle": "386.100 Construction", + "children": [], + "url": "https://2023.antflix.net#386.100" + }, + { + "body": "Each length of surface metal raceway shall be clearly and durably identified as required in the first sentence of 110.21(A). [386.120](https://2023.antflix.net#386.120)", + "displayTitle": "386.120 Marking", + "children": [], + "url": "https://2023.antflix.net#386.120" + } + ], + "url": "https://2023.antflix.net#386" + }, + { + "displayTitle": "Article 388 Surface Nonmetallic Raceways", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_49_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for surface nonmetallic raceways and associated fittings. [388.1](https://2023.antflix.net#388.1)", + "displayTitle": "388.1 Scope", + "children": [], + "url": "https://2023.antflix.net#388.1" + }, + { + "body": "Surface nonmetallic raceway and associated fittings shall be listed. [388.6](https://2023.antflix.net#388.6)", + "displayTitle": "388.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#388.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_49_II" + }, + { + "body": "Surface nonmetallic raceways shall be permitted as follows: The use of surface nonmetallic raceways shall be permitted in dry locations.Extension through walls and floors shall be permitted. Surface nonmetallic raceway shall be permitted to pass transversely through dry walls, dry partitions, and dry floors if the length passing through is unbroken. Access to the conductors shall be maintained on both sides of the wall, partition, or floor. [388.10](https://2023.antflix.net#388.10)", + "displayTitle": "388.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#388.10" + }, + { + "body": "Surface nonmetallic raceways shall not be used in the following: Where concealed, except as permitted in 388.10(2)Where subject to severe physical damageWhere the voltage is 300 volts or more between conductors, unless listed for higher voltageIn hoistwaysIn any hazardous (classified) location, except as permitted by other articles in this CodeWhere subject to ambient temperatures exceeding those for which the nonmetallic raceway is listedFor conductors whose insulation temperature limitations would exceed those for which the nonmetallic raceway is listed [388.12](https://2023.antflix.net#388.12)", + "displayTitle": "388.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#388.12" + }, + { + "body": "No conductor larger than that for which the raceway is designed shall be installed in surface nonmetallic raceway. [388.21](https://2023.antflix.net#388.21)", + "displayTitle": "388.21 Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#388.21" + }, + { + "body": "The number of conductors or cables installed in surface nonmetallic raceway shall not be greater than the number for which the raceway is designed. Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. [388.22](https://2023.antflix.net#388.22)", + "displayTitle": "388.22 Number of Conductors or Cables", + "children": [], + "url": "https://2023.antflix.net#388.22" + }, + { + "body": "Surface nonmetallic raceways and associated fittings shall be supported in accordance with the manufacturer's installation instructions. [388.30](https://2023.antflix.net#388.30)", + "displayTitle": "388.30 Securing and Supporting", + "children": [], + "url": "https://2023.antflix.net#388.30" + }, + { + "body": "Splices and taps shall be permitted in surface nonmetallic raceways having a cover capable of being opened in place that is accessible after installation. The conductors, including splices and taps, shall not fill the raceway to more than 75 percent of its area at that point. Splices and taps in surface nonmetallic raceways without covers capable of being opened in place shall be made only in boxes. All splices and taps shall be made by approved methods. [388.56](https://2023.antflix.net#388.56)", + "displayTitle": "388.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#388.56" + }, + { + "body": "Where equipment grounding is required, a separate grounding conductor shall be installed in the raceway. [388.60](https://2023.antflix.net#388.60)", + "displayTitle": "388.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#388.60" + }, + { + "body": "When combination surface nonmetallic raceways are used both for signaling and for lighting and power circuits, the different systems shall be run in separate compartments identified by stamping, imprinting, or color coding of the interior finish. [388.70](https://2023.antflix.net#388.70)", + "displayTitle": "388.70 Combination Raceways", + "children": [], + "url": "https://2023.antflix.net#388.70" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_44_III" + }, + { + "body": "Surface nonmetallic raceways shall be of such construction as will distinguish them from other raceways. Surface nonmetallic raceways and their elbows, couplings, and similar fittings shall be designed so that the sections can be mechanically coupled together and installed without subjecting the wires to abrasion. Surface nonmetallic raceways and fittings are made of suitable nonmetallic material that is resistant to moisture and chemical atmospheres. It shall also be flame retardant, resistant to impact and crushing, resistant to distortion from heat under conditions likely to be encountered in service, and resistant to low-temperature effects. [388.100](https://2023.antflix.net#388.100)", + "displayTitle": "388.100 Construction", + "children": [], + "url": "https://2023.antflix.net#388.100" + }, + { + "body": "Surface nonmetallic raceways that have limited smoke-producing characteristics shall be permitted to be so identified. Each length of surface nonmetallic raceway shall be clearly and durably identified as required in the first sentence of 110.21(A). [388.120](https://2023.antflix.net#388.120)", + "displayTitle": "388.120 Marking", + "children": [], + "url": "https://2023.antflix.net#388.120" + } + ], + "url": "https://2023.antflix.net#388" + }, + { + "displayTitle": "Article 390 Underfloor Raceways", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_50_I" + }, + { + "body": "This article covers the use and installation requirements for underfloor raceways. [390.1](https://2023.antflix.net#390.1)", + "displayTitle": "390.1 Scope", + "children": [], + "url": "https://2023.antflix.net#390.1" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_50_II" + }, + { + "body": "The installation of underfloor raceways shall be permitted beneath the surface of concrete or other flooring material or in office occupancies where laid flush with the concrete floor and covered with linoleum or equivalent floor covering. [390.10](https://2023.antflix.net#390.10)", + "displayTitle": "390.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#390.10" + }, + { + "body": "Underfloor raceways shall not be installed (1) where subject to corrosive vapors or (2) in any hazardous (classified) locations, except as permitted by 504.20 and in Class I, Division 2 locations as permitted in 501.10(B)(3). Unless made of a material approved for the condition or unless corrosion protection approved for the condition is provided, metal underfloor raceways, junction boxes, and fittings shall not be installed in concrete or in areas subject to severe corrosive influences. [390.12](https://2023.antflix.net#390.12)", + "displayTitle": "390.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#390.12" + }, + { + "body": "Raceway coverings shall comply with 390.15(A) through (D). [390.15](https://2023.antflix.net#390.15)", + "displayTitle": "390.15 Covering", + "children": [ + { + "body": "Half-round and flat-top raceways not over 100 mm (4 in.) in width shall have not less than 20 mm (3/4 in.) of concrete or wood above the raceway. Exception: As permitted in 390.15(C) and (D) for flat-top raceways. [390.15_(A)](https://2023.antflix.net#390.15_(A))", + "displayTitle": "(A) Raceways Not Over 100 mm (4 in.) Wide", + "children": [], + "url": "https://2023.antflix.net#390.15_(A)" + }, + { + "body": "Flat-top raceways over 100 mm (4 in.) but not over 200 mm (8 in.) wide with a minimum of 25 mm (1 in.) spacing between raceways shall be covered with concrete to a depth of not less than 25 mm (1 in.). Raceways spaced less than 25 mm (1 in.) apart shall be covered with concrete to a depth of 38 mm (11/2 in.). [390.15_(B)](https://2023.antflix.net#390.15_(B))", + "displayTitle": "(B) Raceways Over 100 mm (4 in.) Wide but Not Over 200 mm (8 in.) Wide", + "children": [], + "url": "https://2023.antflix.net#390.15_(B)" + }, + { + "body": "Trench-type flush raceways with removable covers shall be permitted to be laid flush with the floor surface. Such approved raceways shall be designed so that the cover plates provide adequate mechanical protection and rigidity equivalent to junction box covers. [390.15_(C)](https://2023.antflix.net#390.15_(C))", + "displayTitle": "(C) Trench-Type Raceways Flush With Concrete", + "children": [], + "url": "https://2023.antflix.net#390.15_(C)" + }, + { + "body": "In office occupancies, approved metal flat-top raceways, if not over 100 mm (4 in.) in width, shall be permitted to be laid flush with the concrete floor surface, provided they are covered with substantial linoleum that is not less than 1.6 mm (1/16 in.) thick or with equivalent floor covering. Where more than one and not more than three single raceways are each installed flush with the concrete, they shall be contiguous with each other and joined to form a rigid assembly. [390.15_(D)](https://2023.antflix.net#390.15_(D))", + "displayTitle": "(D) Other Raceways Flush With Concrete", + "children": [], + "url": "https://2023.antflix.net#390.15_(D)" + } + ], + "url": "https://2023.antflix.net#390.15" + }, + { + "body": "No conductor larger than that for which the raceway is designed shall be installed in underfloor raceways. [390.20](https://2023.antflix.net#390.20)", + "displayTitle": "390.20 Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#390.20" + }, + { + "body": "The combined cross-sectional area of all conductors or cables shall not exceed 40 percent of the interior cross-sectional area of the raceway. [390.22](https://2023.antflix.net#390.22)", + "displayTitle": "390.22 Maximum Number of Conductors in Raceway", + "children": [], + "url": "https://2023.antflix.net#390.22" + }, + { + "body": "The ampacity adjustment factors in 310.15(C) shall apply to conductors installed in underfloor raceways. [390.23](https://2023.antflix.net#390.23)", + "displayTitle": "390.23 Ampacity of Conductors", + "children": [], + "url": "https://2023.antflix.net#390.23" + }, + { + "body": "Splices and taps shall be made only in junction boxes. For the purposes of this section, so-called loop wiring (continuous, unbroken conductor connecting the individual outlets) shall not be considered to be a splice or tap. Exception: Splices and taps shall be permitted in trench-type flush raceway having a removable cover that is accessible after installation. The conductors, including splices and taps, shall not fill more than 75 percent of the raceway area at that point. [390.56](https://2023.antflix.net#390.56)", + "displayTitle": "390.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#390.56" + }, + { + "body": "When an outlet is abandoned, discontinued, or removed, the sections of circuit conductors supplying the outlet shall be removed from the raceway. No splices or reinsulated conductors, such as would be the case with abandoned outlets on loop wiring, shall be allowed in raceways. [390.57](https://2023.antflix.net#390.57)", + "displayTitle": "390.57 Discontinued Outlets", + "children": [], + "url": "https://2023.antflix.net#390.57" + }, + { + "body": "Underfloor raceways shall be laid so that a straight line from the center of one junction box to the center of the next junction box coincides with the centerline of the raceway system. Raceways shall be firmly held in place to prevent disturbing this alignment during construction. [390.70](https://2023.antflix.net#390.70)", + "displayTitle": "390.70 Laid in Straight Lines", + "children": [], + "url": "https://2023.antflix.net#390.70" + }, + { + "body": "A suitable marker shall be installed at or near each end of each straight run of raceways to locate the last insert. [390.71](https://2023.antflix.net#390.71)", + "displayTitle": "390.71 Markers at Ends", + "children": [], + "url": "https://2023.antflix.net#390.71" + }, + { + "body": "Dead ends of raceways shall be closed. [390.73](https://2023.antflix.net#390.73)", + "displayTitle": "390.73 Dead Ends", + "children": [], + "url": "https://2023.antflix.net#390.73" + }, + { + "body": "Junction boxes shall be leveled to the floor grade and sealed to prevent the free entrance of water or concrete. Junction boxes used with metal raceways shall be metal and shall be electrically continuous with the raceways. [390.74](https://2023.antflix.net#390.74)", + "displayTitle": "390.74 Junction Boxes", + "children": [], + "url": "https://2023.antflix.net#390.74" + }, + { + "body": "Inserts shall be leveled and sealed to prevent the entrance of concrete. Inserts used with metal raceways shall be metal and shall be electrically continuous with the raceway. Inserts set in or on fiber raceways before the floor is laid shall be mechanically secured to the raceway. Inserts set in fiber raceways after the floor is laid shall be screwed into the raceway. When cutting through the raceway wall and setting inserts, chips and other dirt shall not be allowed to remain in the raceway, and tools shall be used that are designed so as to prevent the tool from entering the raceway and damaging conductors that may be in place. [390.75](https://2023.antflix.net#390.75)", + "displayTitle": "390.75 Inserts", + "children": [], + "url": "https://2023.antflix.net#390.75" + }, + { + "body": "Connections from underfloor raceways to distribution centers and wall outlets shall be made by approved fittings or by any of the wiring methods in Chapter 3, where installed in accordance with the respective articles. [390.76](https://2023.antflix.net#390.76)", + "displayTitle": "390.76 Connections to Cabinets and Wall Outlets", + "children": [], + "url": "https://2023.antflix.net#390.76" + } + ], + "url": "https://2023.antflix.net#390" + }, + { + "displayTitle": "Article 392 Cable Trays", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_51_I" + }, + { + "body": "This article covers cable tray systems, including ladder, ventilated trough, ventilated channel, solid bottom, and other similar structures. Informational Note: See ANSI/NEMA-VE 1-2017, Metal Cable Tray Systems, and NECA/NEMA 105-2015, Standard for Installing Metal Cable Tray Systems, for further information on cable trays. [392.1](https://2023.antflix.net#392.1)", + "displayTitle": "392.1 Scope", + "children": [], + "url": "https://2023.antflix.net#392.1" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_51_II" + }, + { + "body": "Cable tray shall be permitted to be used as a support system for wiring methods containing service conductors, feeders, branch circuits, communications circuits, control circuits, and signaling circuits. Single insulated cables and single insulated conductors shall be permitted in cable tray only when installed in accordance with 392.10(B)(1). Cable tray installations shall not be limited to industrial establishments. Where exposed to direct rays of the sun, insulated conductors and jacketed cables shall be identified as being sunlight resistant. Cable trays and their associated fittings shall be identified for the intended use. [392.10](https://2023.antflix.net#392.10)", + "displayTitle": "392.10 Uses Permitted", + "children": [ + { + "body": "The wiring methods in Table 392.10(A) shall be permitted to be installed in cable tray systems under the conditions described in their respective articles and sections.\nTable 392.10(A) Wiring Methods\n\n\n\nWiring Method\nArticle\n\n\n\n\nArmored cable: Type AC\n320\n\n\nCATV cables\n800 and 820\n\n\nClass 2 and Class 3 cables\n722 and 725\n\n\nCommunications cables\n800 and 805\n\n\nCommunications raceways\n800\n\n\nElectrical metallic tubing: EMT\n358\n\n\nElectrical nonmetallic tubing: ENT\n362\n\n\nFire alarm cables\n722 and 760\n\n\nFlexible metal conduit: FMC\n348\n\n\nFlexible metallic tubing: FMT\n360\n\n\nInstrumentation tray cable: Type ITC\n341\n\n\nIntermediate metal conduit: IMC\n342\n\n\nLiquidtight flexible metal conduit: LFMC\n350\n\n\nLiquidtight flexible nonmetallic conduit: LFNC\n356\n\n\nMetal-clad cable: Type MC\n330\n\n\nMineral-insulated, metal-sheathed cable: Type MI\n332\n\n\nNetwork-powered broadband communications cables\n800 and 830\n\n\nNonmetallic-sheathed cable: Types NM, NMC, and NMS\n334\n\n\nNon-power-limited fire alarm cable\n722 and 760\n\n\nOptical fiber cables\n722 and 770\n\n\nOther factory-assembled, multiconductor control, signal, or power cables that are specifically approved for installation in cable trays\n \n\n\nPower and control tray cable: Type TC\n336\n\n\nPower-limited fire alarm cable\n722 and 760\n\n\nPower-limited tray cable\n725\n\n\nRigid metal conduit: RMC\n344\n\n\nRigid polyvinyl chloride conduit: PVC\n352\n\n\nReinforced thermosetting resin conduit: RTRC\n355\n\n\nService-entrance cable: Types SE and USE\n338\n\n\nUnderground feeder and branch-circuit cable: Type UF\n340\n\n\n [392.10_(A)](https://2023.antflix.net#392.10_(A))", + "displayTitle": "(A) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#392.10_(A)" + }, + { + "body": "The wiring methods in Table 392.10(A) shall be permitted to be used in any industrial establishment under the conditions described in their respective articles. In industrial establishments only, where conditions of maintenance and supervision ensure that only qualified persons service the installed cable tray system, any of the cables in 392.10(B)(1) and (B)(2) shall be permitted to be installed in ladder, ventilated trough, solid bottom, or ventilated channel cable trays. [392.10_(B)](https://2023.antflix.net#392.10_(B))", + "displayTitle": "(B) In Industrial Establishments", + "children": [ + { + "body": "Single-conductor cables and single insulated conductors shall be permitted to be installed in accordance with 392.10(B)(1)(a) through (B)(1)(c).Single-conductor cables and single insulated conductors shall be 1/0 AWG or larger and shall be of a type listed and marked on the surface for use in cable trays. Where 1/0 AWG through 4/0 AWG single-conductor cables and single insulated conductors are installed in ladder cable tray, the maximum allowable rung spacing for the ladder cable tray shall be 225 mm (9 in.).Welding cables shall comply with Article 630, Part IV.Single conductors used as equipment grounding conductors shall be insulated, covered, or bare, and they shall be 4 AWG or larger. [392.10_(B)_(1)](https://2023.antflix.net#392.10_(B)_(1))", + "displayTitle": "(1) Single-Conductor Cables and Single Insulated Conductors", + "children": [], + "url": "https://2023.antflix.net#392.10_(B)_(1)" + }, + { + "body": "Single- and multiconductor medium voltage cables shall be Type MV cable. Single conductors shall be installed in accordance with 392.10(B)(1). [392.10_(B)_(2)](https://2023.antflix.net#392.10_(B)_(2))", + "displayTitle": "(2) Single- And Multiconductor Medium Voltage Cables", + "children": [], + "url": "https://2023.antflix.net#392.10_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#392.10_(B)" + }, + { + "body": "Cable trays in hazardous (classified) locations shall contain only the cable types and raceways permitted by other articles in this Code. [392.10_(C)](https://2023.antflix.net#392.10_(C))", + "displayTitle": "(C) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#392.10_(C)" + }, + { + "body": "In addition to the uses permitted elsewhere in 392.10, nonmetallic cable tray shall be permitted in corrosive areas and in areas requiring voltage isolation. [392.10_(D)](https://2023.antflix.net#392.10_(D))", + "displayTitle": "(D) Nonmetallic Cable Tray", + "children": [], + "url": "https://2023.antflix.net#392.10_(D)" + }, + { + "body": "In airports where maintenance and supervision conditions ensure that only qualified persons can access, install, or service the cable, airfield lighting cable used in series circuits that are rated up to 5000 volts and are powered by constant current regulators shall be permitted to be installed in cable trays. Informational Note: Federal Aviation Administration (FAA) Advisory Circulars (ACs) provide additional practices and methods for airport lighting. [392.10_(E)](https://2023.antflix.net#392.10_(E))", + "displayTitle": "(E) Airfield Lighting Cable Tray", + "children": [], + "url": "https://2023.antflix.net#392.10_(E)" + } + ], + "url": "https://2023.antflix.net#392.10" + }, + { + "body": "Cable tray systems shall not be used in hoistways or where subject to severe physical damage. [392.12](https://2023.antflix.net#392.12)", + "displayTitle": "392.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#392.12" + }, + { + "displayTitle": "392.18 Cable Tray Installation", + "children": [ + { + "body": "Cable trays shall be installed as a complete system. Field bends or modifications shall be so made that the electrical continuity of the cable tray system and support for the cables is maintained. Cable tray systems shall be permitted to have mechanically discontinuous segments between cable tray runs or between cable tray runs and equipment. [392.18_(A)](https://2023.antflix.net#392.18_(A))", + "displayTitle": "(A) Complete System", + "children": [], + "url": "https://2023.antflix.net#392.18_(A)" + }, + { + "body": "Each run of cable tray shall be completed before the installation of cables. [392.18_(B)](https://2023.antflix.net#392.18_(B))", + "displayTitle": "(B) Completed Before Installation", + "children": [], + "url": "https://2023.antflix.net#392.18_(B)" + }, + { + "body": "In portions of runs where additional protection is required, covers or enclosures providing the required protection shall be of a material that is compatible with the cable tray. [392.18_(C)](https://2023.antflix.net#392.18_(C))", + "displayTitle": "(C) Covers", + "children": [], + "url": "https://2023.antflix.net#392.18_(C)" + }, + { + "body": "Cable trays shall be permitted to extend transversely through partitions and walls or vertically through platforms and floors in wet or dry locations where the installations, complete with installed cables, are made in accordance with 300.21. [392.18_(D)](https://2023.antflix.net#392.18_(D))", + "displayTitle": "(D) Through Partitions and Walls", + "children": [], + "url": "https://2023.antflix.net#392.18_(D)" + }, + { + "body": "Cable trays shall be exposed and accessible, except as permitted by 392.18(D). [392.18_(E)](https://2023.antflix.net#392.18_(E))", + "displayTitle": "(E) Exposed and Accessible", + "children": [], + "url": "https://2023.antflix.net#392.18_(E)" + }, + { + "body": "Sufficient space shall be provided and maintained about cable trays to permit adequate access for installing and maintaining the cables. [392.18_(F)](https://2023.antflix.net#392.18_(F))", + "displayTitle": "(F) Adequate Access", + "children": [], + "url": "https://2023.antflix.net#392.18_(F)" + }, + { + "body": "In industrial facilities where conditions of maintenance and supervision ensure that only qualified persons service the installation and where the cable tray systems are designed and installed to support the load, such systems shall be permitted to support raceways and cables, and boxes and conduit bodies covered in 314.1. For raceways terminating at the tray, a listed cable tray clamp or adapter shall be used to securely fasten the raceway to the cable tray system. Additional supporting and securing of the raceway shall be in accordance with the appropriate raceway article. For raceways or cables running parallel to and attached to the bottom or side of a cable tray system, fastening and supporting shall be in accordance with the appropriate raceway or cable article. For boxes and conduit bodies attached to the bottom or side of a cable tray system, fastening and supporting shall be in accordance with 314.23. [392.18_(G)](https://2023.antflix.net#392.18_(G))", + "displayTitle": "(G) Raceways, Cables, Boxes, and Conduit Bodies Supported From Cable Tray Systems", + "children": [], + "url": "https://2023.antflix.net#392.18_(G)" + }, + { + "body": "Cable trays containing conductors operating over 600 volts shall have a permanent, legible warning notice carrying the wording \"DANGER - HIGH VOLTAGE - KEEP AWAY\" placed in a readily visible position on all cable trays, with the spacing of warning notices not to exceed 3 m (10 ft). The danger marking(s) or labels shall comply with 110.21 (B). Exception: Where not accessible (as applied to equipment), in industrial establishments where the conditions of maintenance and supervision ensure that only qualified persons service the installation, cable tray system warning notices shall be located where necessary for the installation to ensure safe maintenance and operation. [392.18_(H)](https://2023.antflix.net#392.18_(H))", + "displayTitle": "(H) Marking", + "children": [], + "url": "https://2023.antflix.net#392.18_(H)" + } + ], + "url": "https://2023.antflix.net#392.18" + }, + { + "displayTitle": "392.20 Cable and Conductor Installation", + "children": [ + { + "body": "Multiconductor cables operating at 1000 volts or less shall be permitted to be installed in the same tray. [392.20_(A)](https://2023.antflix.net#392.20_(A))", + "displayTitle": "(A) Multiconductor Cables Operating at 1000 Volts or Less", + "children": [], + "url": "https://2023.antflix.net#392.20_(A)" + }, + { + "body": "Cables operating at over 1000 volts and those operating at 1000 volts or less installed in the same cable tray shall comply with either of the following: The cables operating at over 1000 volts are Type MC.The cables operating at over 1000 volts are separated from the cables operating at 1000 volts or less by a solid fixed barrier of a material compatible with the cable tray. [392.20_(B)](https://2023.antflix.net#392.20_(B))", + "displayTitle": "(B) Cables Operating at Over 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#392.20_(B)" + }, + { + "body": "Where single conductor cables comprising each phase, neutral, or grounded conductor of an alternating-current circuit are connected in parallel as permitted in 310.10(G), the conductors shall be installed in groups consisting of not more than one conductor per phase, neutral, or grounded conductor to prevent current imbalance in the paralleled conductors due to inductive reactance. Single conductors shall be securely bound in circuit groups to prevent excessive movement due to fault-current magnetic forces unless single conductors are cabled together, such as triplexed assemblies. [392.20_(C)](https://2023.antflix.net#392.20_(C))", + "displayTitle": "(C) Connected in Parallel", + "children": [], + "url": "https://2023.antflix.net#392.20_(C)" + }, + { + "body": "Where any of the single conductors installed in ladder or ventilated trough cable trays are 1/0 through 4/0 AWG, all single conductors shall be installed in a single layer. Conductors that are bound together to comprise each circuit group shall be permitted to be installed in other than a single layer. [392.20_(D)](https://2023.antflix.net#392.20_(D))", + "displayTitle": "(D) Single Conductors", + "children": [], + "url": "https://2023.antflix.net#392.20_(D)" + } + ], + "url": "https://2023.antflix.net#392.20" + }, + { + "displayTitle": "392.22 Number of Conductors or Cables", + "children": [ + { + "body": "The number of multiconductor cables, rated 2000 volts or less, permitted in a single cable tray shall not exceed the requirements of this section. The conductor sizes shall apply to both aluminum and copper conductors. Where dividers are used, fill calculations shall apply to each divided section of the cable tray. [392.22_(A)](https://2023.antflix.net#392.22_(A))", + "displayTitle": "(A) Number of Multiconductor Cables, Rated 2000 Volts or Less, in Cable Trays", + "children": [ + { + "body": "Where ladder or ventilated trough cable trays contain multiconductor power or lighting cables, or any mixture of multiconductor power, lighting, control, and signal cables, the maximum number of cables shall conform to 392.22(A)(1)(a) through (A)(1)(c).\n\nWhere all of the cables are 4/0 AWG or larger, the sum of the diameters of all cables shall not exceed the cable tray width, and the cables shall be installed in a single layer. Where the cable ampacity is determined according to 392.80(A)(1)(c), the cable tray width shall not be less than the sum of the diameters of the cables and the sum of the required spacing widths between the cables.\nWhere all of the cables are smaller than 4/0 AWG, the sum of the cross-sectional areas of all cables shall not exceed the maximum allowable cable fill area in Column 1 of Table 392.22(A)(1) for the appropriate cable tray width.\nWhere 4/0 AWG or larger cables are installed in the same cable tray with cables smaller than 4/0 AWG, the sum of the cross-sectional areas of all cables smaller than 4/0 AWG shall not exceed the maximum allowable fill area resulting from the calculation in Column 2 of Table 392.22(A)(1) for the appropriate cable tray width. The 4/0 AWG and larger cables shall be installed in a single layer, and no other cables shall be placed on them. \n\nTable 392.22(A)(1) Allowable Cable Fill Area for Multiconductor Cables in Ladder, Ventilated Trough, or Solid Bottom Cable Trays for Cables Rated 2000 Volts or Less\n\n\n\nInside Width of Cable Tray\nMaximum Allowable Fill Area for Multiconductor Cables\n\n\nLadder or Ventilated Trough or Wire Mesh Cable Trays, 392.22(A)(1)\nSolid Bottom Cable Trays, 392.22(A)(3)\n\n\nColumn 1 Applicable for 392.22(A)(1)(b) Only\nColumn 2a Applicable for 392.22(A)(1)(c) Only\nColumn 3 Applicable for 392.22(A)(3)(b) Only\nColumn 4a Applicable for 392.22(A)(3)(c) Only\n\n\nmm\nin.\nmm2\nin.2\nmm2\nin.2\nmm2\nin.2\nmm2\nin.2\n\n\n\n\n50\n2.0\n1,500\n2.5\n1,500\u2014(30 Sd)b\n2.5\u2014(1.2 Sd)b\n1,200\n2.0\n1,200\u2014(25 Sd)b\n2.0 \u2014 Sdb\n\n\n100\n4.0\n3,000\n4.5\n3,000 \u2014 (30 Sd)b\n4.5 \u2014 (1.2 Sd)\n2,300\n3.5\n2,300 \u2014 (25 Sd)\n3.5 \u2014 Sd\n\n\n150\n6.0\n4,500\n7.0\n4,500 \u2014 (30 Sd)b\n7 \u2014 (1.2 Sd)\n3,500\n5.5\n3,500 \u2014 (25 Sd)b\n5.5 \u2014 Sd\n\n\n200\n8.0\n6,000\n9.5\n6,000 \u2014 (30 Sd)b\n9.5 \u2014 (1.2 Sd)\n4,500\n7.0\n4,500 \u2014 (25 Sd)\n7.0 \u2014 Sd\n\n\n225\n9.0\n6,800\n10.5\n6,800 \u2014 (30 Sd)\n10.5 \u2014 (1.2 Sd)\n5,100\n8.0\n5,100 \u2014 (25 Sd)\n8.0 \u2014 Sd\n\n\n300\n12.0\n9,000\n14.0\n9,000 \u2014 (30 Sd)\n14 \u2014 (1.2 Sd)\n7,100\n11.0\n7,100 \u2014 (25 Sd)\n11.0 \u2014 Sd\n\n\n400\n16.0\n12,000\n18.5\n12,000 \u2014 (30 Sd)\n18.5 \u2014 (1.2 Sd)\n9,400\n14.5\n9,400 \u2014 (25 Sd)\n14.5 \u2014 Sd\n\n\n450\n18.0\n13,500\n21.0\n13,500 \u2014 (30 Sd)\n21 \u2014 (1.2 Sd)\n10,600\n16.5\n10,600 \u2014 (25 Sd)\n16.5 \u2014 Sd\n\n\n500\n20.0\n15,000\n23.5\n15,000 \u2014 (30 Sd)\n23.5 \u2014 (1.2 Sd)\n11,800\n18.5\n11,800 \u2014 (25 Sd)\n18.5 \u2014 Sd\n\n\n600\n24.0\n18,000\n28.0\n18,000 \u2014 (30 Sd)\n28 \u2014 (1.2 Sd)\n14,200\n22.0\n14,200 \u2014 (25 Sd)\n22.0 \u2014 Sd\n\n\n750\n30.0\n22,500\n35.0\n22,500 \u2014 (30 Sd)\n35 \u2014 (1.2 Sd)\n17,700\n27.5\n17,700 \u2014 (25 Sd)\n27.5 \u2014 Sd\n\n\n900\n36.0\n27,000\n42.0\n27,000 \u2014 (30 Sd)\n42 \u2014 (1.2 Sd)\n21,300\n33.0\n21,300 \u2014 (25 Sd)\n33.0 \u2014 Sd\n\n\n\naThe maximum allowable fill areas in Columns 2 and 4 shall be calculated. For example, the maximum allowable fill in mm2 for a 150-mm wide cable tray in Column 2 shall be 4500 minus (30 multiplied by Sd) [the maximum allowable fill, in square inches, for a 6-in. wide cable tray in Column 2 shall be 7 minus (1.2 multiplied by Sd)].\nbThe term Sd in Columns 2 and 4 is equal to the sum of the diameters, in mm, of all cables 107.2 mm (in inches, of all 4/0 AWG) and larger multiconductor cables in the same cable tray with smaller cables. [392.22_(A)_(1)](https://2023.antflix.net#392.22_(A)_(1))", + "displayTitle": "(1) Ladder or Ventilated Trough Cable Trays Containing Any Mixture of Cables", + "children": [], + "url": "https://2023.antflix.net#392.22_(A)_(1)" + }, + { + "body": "Where a ladder or ventilated trough cable tray having a usable inside depth of 150 mm (6 in.) or less contains multiconductor control and/or signal cables only, the sum of the cross-sectional areas of all cables at any cross section shall not exceed 50 percent of the interior cross-sectional area of the cable tray. A depth of 150 mm (6 in.) shall be used to calculate the allowable interior cross-sectional area of any cable tray that has a usable inside depth of more than 150 mm (6 in.). [392.22_(A)_(2)](https://2023.antflix.net#392.22_(A)_(2))", + "displayTitle": "(2) Ladder or Ventilated Trough Cable Trays Containing Multiconductor Control and/or Signal Cables Only", + "children": [], + "url": "https://2023.antflix.net#392.22_(A)_(2)" + }, + { + "body": "Where solid bottom cable trays contain multiconductor power or lighting cables, or any mixture of multiconductor power, lighting, control, and signal cables, the maximum number of cables shall conform to 392.22(A)(3)(a) through (A)(3)(c). Where all of the cables are 4/0 AWG or larger, the sum of the diameters of all cables shall not exceed 90 percent of the cable tray width, and the cables shall be installed in a single layer.Where all of the cables are smaller than 4/0 AWG, the sum of the cross-sectional areas of all cables shall not exceed the maximum allowable cable fill area in Column 3 of Table 392.22(A)(1) for the appropriate cable tray width.Where 4/0 AWG or larger cables are installed in the same cable tray with cables smaller than 4/0 AWG, the sum of the cross-sectional areas of all cables smaller than 4/0 AWG shall not exceed the maximum allowable fill area resulting from the computation in Column 4 of Table 392.22(A)(1) for the appropriate cable tray width. The 4/0 AWG and larger cables shall be installed in a single layer, and no other cables shall be placed on them. [392.22_(A)_(3)](https://2023.antflix.net#392.22_(A)_(3))", + "displayTitle": "(3) Solid Bottom Cable Trays Containing Any Mixture of Cables", + "children": [], + "url": "https://2023.antflix.net#392.22_(A)_(3)" + }, + { + "body": "Where a solid bottom cable tray having a usable inside depth of 150 mm (6 in.) or less contains multiconductor control and/or signal cables only, the sum of the cross sectional areas of all cables at any cross-section shall not exceed 40 percent of the interior cross-sectional area of the cable tray. A depth of 150 mm (6 in.) shall be used to calculate the allowable interior cross-sectional area of any cable tray that has a usable inside depth of more than 150 mm (6 in.). [392.22_(A)_(4)](https://2023.antflix.net#392.22_(A)_(4))", + "displayTitle": "(4) Solid Bottom Cable Tray Containing Multiconductor Control and/or Signal Cables Only", + "children": [], + "url": "https://2023.antflix.net#392.22_(A)_(4)" + }, + { + "body": "Where ventilated channel cable trays contain multiconductor cables of any type, 392.22(A)(5)(a) and (A)(5)(b) shall apply. Where only one multiconductor cable is installed, the cross-sectional area shall not exceed the value specified in Column 1 of Table 392.22(A)(5).Where more than one multiconductor cable is installed, the sum of the cross-sectional area of all cables shall not exceed the value specified in Column 2 of Table 392.22(A)(5).Table 392.22(A)(5) Allowable Cable Fill Area for Multiconductor Cables in Ventilated Channel Cable Trays for Cables Rated 2000 Volts or Less\n\n\n\nInside Width of Cable Tray\nMaximum Allowable Fill Area for Multiconductor Cables\n\n\nColumn 1 One Cable\nColumn 2 More Than One Cable\n\n\nmm\nin.\nmm2\nin.2\nmm\nin.\n\n\n\n\n75\n3\n1500\n2.3\n850\n1.3\n\n\n100\n4\n2900\n4.5\n1600\n2.5\n\n\n150\n6\n4500\n7.0\n2450\n3.8\n\n\n [392.22_(A)_(5)](https://2023.antflix.net#392.22_(A)_(5))", + "displayTitle": "(5) Ventilated Channel Cable Trays Containing Multiconductor Cables of Any Type", + "children": [], + "url": "https://2023.antflix.net#392.22_(A)_(5)" + }, + { + "body": "Where solid channel cable trays contain multiconductor cables of any type, 392.22(A)(6)(a) and (A)(6)(b) shall apply. Where only one multiconductor cable is installed, the cross-sectional area of the cable shall not exceed the value specified in Column 1 of Table 392.22(A)(6).Where more than one multiconductor cable is installed, the sum of the cross-sectional area of all cable shall not exceed the value specified in Column 2 of Table 392.22(A)(6).Table 392.22(A)(6) Allowable Cable Fill Area for Multiconductor Cables in Solid Channel Cable Trays for Cables Rated 2000 Volts or Less\n\n\n\nInside Width of Cable Tray\nColumn 1 One Cable\nColumn 2 More Than One Cable\n\n\nmm\nin.\nmm2\nin.2\nmm2\nin.2\n\n\n\n\n50\n2\n850\n1.3\n500\n0.8\n\n\n75\n3\n1300\n2.0\n700\n1.1\n\n\n100\n4\n2400\n3.7\n1400\n2.1\n\n\n150\n6\n3600\n5.5\n2100\n3.2\n\n\n [392.22_(A)_(6)](https://2023.antflix.net#392.22_(A)_(6))", + "displayTitle": "(6) Solid Channel Cable Trays Containing Multiconductor Cables of Any Type", + "children": [], + "url": "https://2023.antflix.net#392.22_(A)_(6)" + } + ], + "url": "https://2023.antflix.net#392.22_(A)" + }, + { + "body": "The number of single conductor cables, rated 2000 volts or less, permitted in a single cable tray section shall not exceed the requirements of this section. The single conductors, or conductor assemblies, shall be evenly distributed across the cable tray. The conductor sizes shall apply to both aluminum and copper conductors. [392.22_(B)](https://2023.antflix.net#392.22_(B))", + "displayTitle": "(B) Number of Single-Conductor Cables, Rated 2000 Volts or Less, in Cable Trays", + "children": [ + { + "body": "Where ladder or ventilated trough cable trays contain single-conductor cables, the maximum number of single conductors shall conform to 392.22(B)(1)(a) through (B)(1)(d). Where all of the cables are 1000 kcmil or larger, the sum of the diameters of all single-conductor cables shall not exceed the cable tray width, and the cables shall be installed in a single layer. Conductors that are bound together to comprise each circuit group shall be permitted to be installed in other than a single layer.Where all of the cables are from 250 kcmil through 900 kcmil. the sum of the cross-sectional areas of all single-conductor cables shall not exceed the maximum allowable cable (ill area in Column 1 of Table 392.22(B)(1) for the appropriate cable tray width.Where 1000 kcmil or larger single-conductor cables are installed in the same cable tray with single-conductor cables smaller than 1000 kcmil, the sum of the cross sectional areas of all cables smaller than 1000 kcmil shall not exceed the maximum allowable fill area resulting from the computation in Column 2 of Table 392.22(B)(1) for the appropriate cable tray width.Where any of the single conductor cables are 1/0 through 4/0 AWG, the sum of the diameters of all single conductor cables shall not exceed the cable tray width.\n\n\nTable 392.22(B)(1) Allowable Cable Fill Area for Single-Conductor Cables in Ladder, Ventilated Trough, or Wire Mesh Cable Trays for Cables Rated 2000 Volts or Less\n\n\n\nInside Width of Cable Tray\nMaximum Allowable Fill Area for Single-Conductor Cables in Ladder, Ventilated Trough, or Wire Mesh Cable Trays\n\n\nColumn 1 Applicable for 392.22(B)(1)(b) Only\nColumn 2a Applicable for 392.22(B)(1)(c) Only\n\n\nmm\nin.\nmm2\nin.2\nmm2\nin.2\n\n\n\n\n50\n2\n1,400\n2.0\n1.400 \u2014 (28 Sd)b\n2.0 \u2014 (1.1 Sd)b\n\n\n100\n4\n2,800\n4.5\n2,800 \u2014 (28 Sd)\n4.5 \u2014 (1.1 Sd)\n\n\n150\n6\n4,200\n6.5\n4,200 \u2014 (28 Sd)b\n6.5 \u2014 (1.1 Sd)b\n\n\n200\n8\n5,600\n8.5\n5,600 \u2014 (28 Sd)\n8.5 \u2014 (1.1 Sd)\n\n\n225\n9\n6,100\n9.5\n6,100 \u2014 (28 Sd)\n9.5 \u2014 (1.1 Sd)\n\n\n300\n12\n8,400\n13.0\n8,400 \u2014 (28 Sd)\n13.0 \u2014 (1.1 Sd)\n\n\n400\n16\n11,200\n17.5\n11,200 \u2014 (28 Sd)\n17.5 \u2014 (1.1 Sd)\n\n\n450\n18\n12,600\n19.5\n12,600 \u2014 (28 Sd)\n19.5 \u2014 (1.1 Sd)\n\n\n500\n20\n14,000\n21.5\n14,000 \u2014 (28 Sd)\n21.5 \u2014 (1.1 Sd)\n\n\n600\n24\n16,800\n26.0\n16,800 \u2014 (28 Sd)\n26.0 \u2014 (1.1 Sd)\n\n\n750\n30\n21,000\n32.5\n21,000 \u2014 (28 Sd)\n32.5 \u2014 (1.1 Sd)\n\n\n900\n36\n25,200\n39.0\n25,200 \u2014 (28 Sd)\n39.0 \u2014 (1.1 Sd)\n\n\n\naThe maximum allowable fill areas in Column 2 shall be calculated. For example, the maximum allowable fill, in mm2, for a 150-mm wide cable tray in Column 2 shall be 4200 minus (28 multiplied by Sd) [the maximum allowable fill, in square inches, for a 6-in. wide cable tray in Column 2 shall be 6.5 minus (1.1 multiplied by Sd)].\nbThe term Sd in Column 2 is equal to the sum of the diameters, in mm, of all cables 507 mm2 (in inches, of all 1000 kcmil) and larger single-conductor cables in the same cable tray with small cables. [392.22_(B)_(1)](https://2023.antflix.net#392.22_(B)_(1))", + "displayTitle": "(1) Ladder or Ventilated Trough Cable Trays", + "children": [], + "url": "https://2023.antflix.net#392.22_(B)_(1)" + }, + { + "body": "Where 50 mm (2 in.), 75 mm (3 in.), 100 mm (4 in.), or 150 mm (6 in.) wide ventilated channel cable trays contain single-conductor cables, the sum of the diameters of all single conductors shall not exceed the inside width of the channel. [392.22_(B)_(2)](https://2023.antflix.net#392.22_(B)_(2))", + "displayTitle": "(2) Ventilated Channel Cable Trays", + "children": [], + "url": "https://2023.antflix.net#392.22_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#392.22_(B)" + }, + { + "body": "The number of cables rated 2001 volts or over permitted in a single cable tray shall not exceed the requirements of this section.\nThe sum of the diameters of single-conductor and multiconductor cables shall not exceed the cable tray width, and the cables shall be installed in a single layer. Where single conductor cables are triplexed, quadruplexed, or bound together in circuit groups, the sum of the diameters of the single conductors shall not exceed the cable tray width, and these groups shall be installed in single layer arrangement. [392.22_(C)](https://2023.antflix.net#392.22_(C))", + "displayTitle": "(C) Number of Type MV and Type MC Cables (2001 Volts or Over) in Cable Trays", + "children": [], + "url": "https://2023.antflix.net#392.22_(C)" + } + ], + "url": "https://2023.antflix.net#392.22" + }, + { + "displayTitle": "392.30 Securing and Supporting", + "children": [ + { + "body": "Cable trays shall be supported at intervals in accordance with the installation instructions. [392.30_(A)](https://2023.antflix.net#392.30_(A))", + "displayTitle": "(A) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#392.30_(A)" + }, + { + "body": "Cables and conductors shall be secured to and supported by the cable tray system in accordance with the following, as applicable: In other than horizontal runs, the cables shall be fastened securely to transverse members of the cable tray.Supports shall be provided to prevent stress on cables where they enter raceways from cable tray systems.The system shall provide for the support of cables and raceway wiring methods in accordance with their corresponding articles. Where cable trays support individual conductors or multiconductor cables and where the conductors or multiconductor cables pass from one cable tray to another, or from a cable tray to raceway(s) or from a cable tray to equipment where the conductors are terminated, the distance between the cable trays or between the cable tray and the raceway(s) or the equipment shall not exceed 1.8 m (6 ft). The conductors shall be secured to the cable tray(s) at the transition, and they shall be protected, by guarding or by location, from physical damage.Cable ties shall be listed and identified for the application and for securement and support. [392.30_(B)](https://2023.antflix.net#392.30_(B))", + "displayTitle": "(B) Cables and Conductors", + "children": [], + "url": "https://2023.antflix.net#392.30_(B)" + } + ], + "url": "https://2023.antflix.net#392.30" + }, + { + "body": "Expansion splice plates for cable trays shall be provided where necessary to compensate for thermal expansion and contraction. [392.44](https://2023.antflix.net#392.44)", + "displayTitle": "392.44 Expansion Splice Plates", + "children": [], + "url": "https://2023.antflix.net#392.44" + }, + { + "body": "A box shall not be required where cables or conductors are installed in bushed conduit and tubing used for support or for protection against physical damage or where conductors or cables transition to a raceway wiring method from the cable tray. Conductors shall be permitted to enter equipment in accordance with 392.46(A) or (B). [392.46](https://2023.antflix.net#392.46)", + "displayTitle": "392.46 Bushed Conduit and Tubing", + "children": [ + { + "body": "Individual conductors or multiconductor cables with entirely nonmetallic sheaths shall be permitted to enter enclosures where they are terminated through nonflexible bushed conduit or tubing installed for their protection provided they are secured at the point of transition from the cable tray and the conduit or tubing is sealed at the outer end using an approved means so as to prevent debris from entering the equipment through the conduit or tubing. [392.46_(A)](https://2023.antflix.net#392.46_(A))", + "displayTitle": "(A) Through Bushed Conduit or Tubing", + "children": [], + "url": "https://2023.antflix.net#392.46_(A)" + }, + { + "body": "Individual conductors or multiconductor cables with entirely nonmetallic sheaths shall be permitted to enter enclosures through openings associated with flanges from cable trays where the cable tray is attached to the flange and the flange is mounted directly to the equipment. The openings shall be made such that the conductors are protected from abrasion and the opening shall be sealed or covered to prevent debris from entering the enclosure through the opening. Informational Note: One method of preventing debris from entering the enclosure is to seal the outer end of the raceway or the opening with duct seal. [392.46_(B)](https://2023.antflix.net#392.46_(B))", + "displayTitle": "(B) Flanged Connections", + "children": [], + "url": "https://2023.antflix.net#392.46_(B)" + } + ], + "url": "https://2023.antflix.net#392.46" + }, + { + "body": "Cable splices and Type MV cable joints made and insulated by approved methods shall be permitted to be located within a cable tray, provided they are accessible. Splices and Type MV cable joints shall be permitted to project above the side rails where not subject to physical damage. [392.56](https://2023.antflix.net#392.56)", + "displayTitle": "392.56 Cable Splices and Type MV Cable Joints", + "children": [], + "url": "https://2023.antflix.net#392.56" + }, + { + "displayTitle": "392.60 Grounding and Bonding", + "children": [ + { + "body": "Metal cable trays shall be permitted to be used as equipment grounding conductors where continuous maintenance and supervision ensure that qualified persons service the installed cable tray system and the cable tray complies with this section. Metal cable trays that support electrical conductors shall be grounded as required for conductor enclosures in accordance with 250.96 and Part IV of Article 250. Metal cable trays containing only non-power conductors shall be electrically continuous through approved connections or the use of a bonding jumper. Informational Note: Examples of non-power conductors include nonconductive optical fiber cables and Class 2 and Class 3 remote-control, signaling, and power-limited circuits. [392.60_(A)](https://2023.antflix.net#392.60_(A))", + "displayTitle": "(A) Metal Cable Trays", + "children": [], + "url": "https://2023.antflix.net#392.60_(A)" + }, + { + "body": "Steel or aluminum cable tray systems shall be permitted to be used as equipment grounding conductors, provided all the following requirements are met:\n\nThe cable tray sections and fittings are identified as an equipment grounding conductor.\nThe minimum cross-sectional area of cable trays conform to the requirements in Table 392.60(B).\nAll cable tray sections and fittings are legibly and durably marked to show the cross-sectional area of metal in channel cable trays, or cable trays of one-piece construction, and the total cross-sectional area of both side rails for ladder or trough cable trays.\nCable tray sections, fittings, and connected raceways are bonded in accordance with 250.96, using bolted mechanical connectors or bonding jumpers sized and installed in accordance with 250.102./li>\n\nTable 392.60(B) Metal Area Requirements for Cable Trays Used as Equipment Grounding Conductor\n\n\n\nMaximum Fuse Ampere Rating, Circuit Breaker Ampere Trip Setting, or Circuit Breaker Protective Relay Ampere Trip Setting for Ground-Fault Protection of Any Cable Circuit in the Cable Tray System\nMinimum Cross-Sectional Area of Metal*\n\n\nSteel Cable Trays\nAluminum Cable Trays\n\n\nmm2\nin.2\nmm2\nin.2\n\n\n\n\n60\n129\n0.20\n129\n0.20\n\n\n100\n258\n0.40\n129\n0.20\n\n\n200\n451.5\n0.70\n129\n0.20\n\n\n400\n645\n1.00\n258\n0.40\n\n\n600\n967.5\n1.50\u2020\n258\n0.40\n\n\n1000\n-\n-\n387\n0.60\n\n\n1200\n-\n-\n645\n1.00\n\n\n1600\n-\n-\n967.5\n1.50\n\n\n2000\n-\n-\n1290\n2.00\u2020\n\n\n\n*Total cross-sectional area of both side rails for ladder or trough cable trays; or the minimum cross-sectional area of metal in channel cable trays or cable trays of one-piece construction.\n\u2020Steel cable trays shall not be used as equipment grounding conductors for circuits with ground-fault protection above 600 amperes. Aluminum cable trays shall not be used as equipment grounding conductors for circuits with ground-fault protection above 2000 amperes. [392.60_(B)](https://2023.antflix.net#392.60_(B))", + "displayTitle": "(B) Steel or Aluminum Cable Tray Systems", + "children": [], + "url": "https://2023.antflix.net#392.60_(B)" + }, + { + "body": "Where metal cable tray systems are mechanically discontinuous, as permitted in 392.18(A), a bonding jumper sized in accordance with 250.102 shall connect the two sections of the cable tray, or the cable tray and the raceway or equipment. Bonding shall be in accordance with 250.96. [392.60_(C)](https://2023.antflix.net#392.60_(C))", + "displayTitle": "(C) Transitions", + "children": [], + "url": "https://2023.antflix.net#392.60_(C)" + } + ], + "url": "https://2023.antflix.net#392.60" + }, + { + "displayTitle": "392.80 Ampacity of Conductors", + "children": [ + { + "body": "Informational Note: See 110.14(C) for conductor temperature limitations due to termination provisions. [392.80_(A)](https://2023.antflix.net#392.80_(A))", + "displayTitle": "(A) Ampacity of Cables, Rated 2000 Volts or Less, in Cable Trays", + "children": [ + { + "body": "The ampacity of multiconductor cables, nominally rated 2000 volts or less, installed according to the requirements of 392.22(A) shall be as given in Table 310.16 and Table 310.18, subject to 392.80(A)(1)(a), (A)(1)(b), (A)(1)(c), and 310.14(A)(2). The adjustment factors of 310.15(C)(1) shall apply only to multiconductor cables with more than three current-carrying conductors. Adjustment factors shall be limited to the number of current-carrying conductors in the cable and not to the number of conductors in the cable tray.Where cable trays are continuously covered for more than 1.8 m (6 ft) with solid unventilated covers, not over 95 percent of the ampacities of Table 310.16 and Table 310.18 shall be permitted for multiconductor cables.Where multiconductor cables are installed in a single layer in uncovered trays, with a maintained spacing of not less than one cable diameter between cables, the ampacity shall not exceed the ambient temperature-corrected ampacities of multiconductor cables, with not more than three insulated conductors rated 0 through 2000 volts in free air, in accordance with 310.14(B).Informational Note: See Informative Annex B, Table B.2(3). [392.80_(A)_(1)](https://2023.antflix.net#392.80_(A)_(1))", + "displayTitle": "(1) Multiconductor Cables", + "children": [], + "url": "https://2023.antflix.net#392.80_(A)_(1)" + }, + { + "body": "The ampacity of single-conductor cables shall be as permitted by 310.14(A)(2). The adjustment factors of 310.15(C)(1) shall not apply to the ampacity of cables in cable trays. The ampacity of single-conductor cables, or single conductors cabled together (triplexed, quadruplexed, and so forth), nominally rated 2000 volts or less, shall comply with 392.80(A)(2)(a) through (A)(2)(d). Where installed according to the requirements of 392.22(B), the ampacities for 600 kcmil and larger single-conductor cables in uncovered cable trays shall not exceed 75 percent of the ampacities in Table 310.17 and Table 310.19. Where cable trays are continuously covered for more than 1.8 m (6 ft) with solid unventilated covers, the ampacities for 600 kcmil and larger cables shall not exceed 70 percent of the ampacities in Table 310.17 and Table 310.19.Where installed according to the requirements of 392.22(B), the ampacities for 1/0 AWG through 500 kcmil single-conductor cables in uncovered cable trays shall not exceed 65 percent of the ampacities in Table 310.17 and Table 310.19. Where cable trays are continuously covered for more than 1.8 m (6 ft) with solid unventilated covers, the ampacities for 1/0 AWG through 500 kcmil cables shall not exceed 60 percent of the ampacities in Table 310.17 and Table 310.19.Where single conductors are installed in a single layer in uncovered cable trays, with a maintained space of not less than one cable diameter between individual conductors, the ampacity of 1/0 AWG and larger cables shall not exceed the ampacities in Table 310.17 and Table 310.19.Exception to (c): For solid bottom cable trays, the ampacity of single conductor cables shall be determined by 310.14(B).Where single conductors are installed in a triangular or square configuration in uncovered cable trays, with a maintained free airspace of not less than 2.15 times one conductor diameter (2.15 x O.D.) of the largest conductor contained within the configuration and adjacent conductor configurations or cables, the ampacity of 1/0 AWG and larger cables shall not exceed the ampacities of two or three single insulated conductors rated 0 through 2000 volts supported on a messenger in accordance with 310.15.Informational Note: See Table 310.20. [392.80_(A)_(2)](https://2023.antflix.net#392.80_(A)_(2))", + "displayTitle": "(2) Single-Conductor Cables", + "children": [], + "url": "https://2023.antflix.net#392.80_(A)_(2)" + }, + { + "body": "Where a cable tray contains a combination of multiconductor and single-conductor cables, the ampacities shall be as given in 392.80(A)(1) for multiconductor cables and 392.80(A)(2) for single-conductor cables, provided that the following conditions apply: The sum of the multiconductor cable fill area as a percentage of the allowable fill area for the tray calculated in accordance with 392.22(A), and the single-conductor cable fill area as a percentage of the allowable fill area for the tray calculated in accordance with 392.22(B), totals not more than 100 percent.Multiconductor cables are installed according to 392.22(A), and single-conductor cables are installed according to 392.22(B) and 392.22(C). [392.80_(A)_(3)](https://2023.antflix.net#392.80_(A)_(3))", + "displayTitle": "(3) Combinations of Multiconductor and Single-Conductor Cables", + "children": [], + "url": "https://2023.antflix.net#392.80_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#392.80_(A)" + }, + { + "body": "The ampacity of cables, rated 2001 volts, nominal, or over, installed according to 392.22(C) shall not exceed the requirements of this section. Informational Note: See 110.40 for conductor temperature limitations due to termination provisions. [392.80_(B)](https://2023.antflix.net#392.80_(B))", + "displayTitle": "(B) Ampacity of Type MV and Type MC Cables (2001 Volts or Over) in Cable Trays", + "children": [ + { + "body": "The ampacity of multiconductor cables shall be as given in Table 315.60(C)(9) and Table 315.60(C)(10), subject to the following: Where cable trays are continuously covered for more than 1.8 m (6 ft) with solid unventilated covers, not more than 95 percent of the ampacities of Table 315.60(C)(9) and Table 315.60(C)(10) shall be permitted for multiconductor cables.Where multiconductor cables are installed in a single layer in uncovered cable trays, with maintained spacing of not less than one cable diameter between cables, the ampacity shall not exceed the allowable ampacities of Table 315.60(C)(5) and Table 315.60(C)(6). [392.80_(B)_(1)](https://2023.antflix.net#392.80_(B)_(1))", + "displayTitle": "(1) Multiconductor Cables (2001 Volts or Over)", + "children": [], + "url": "https://2023.antflix.net#392.80_(B)_(1)" + }, + { + "body": "The ampacity of single-conductor cables, or single conductors cabled together (triplexed, quadruplexed, and so forth), shall comply with the following: The ampacities for 1/0 AWG and larger single-conductor cables in uncovered cable trays shall not exceed 75 percent of the ampacities in Table 315.60(C)(3) and Table 315.60(C)(4). Where the cable trays are covered for more than 1.8 m (6 ft) with solid unventilated covers, the ampacities for 1/0 AWG and larger single-conductor cables shall not exceed 70 percent of the ampacities in Table 315.60(C)(3) and Table 315.60(C)(4).Where single-conductor cables are installed in a single layer in uncovered cable trays, with a maintained space of not less than one cable diameter between individual conductors, the ampacity of 1/0 AWG and larger cables shall not exceed the ampacities in Table 315.60(C)(3) and Table 315.60(C)(4).Where single conductors are installed in a triangular or square configuration in uncovered cable trays, with a maintained free air space of not less than 2.15 times the diameter (2.15 x O.D.) of the largest conductor contained within the configuration and adjacent conductor configurations or cables, the ampacity of 1/0 AWG and larger cables shall not exceed the ampacities in Table 315.60(C)(1) and Table 315.60(C)(2). [392.80_(B)_(2)](https://2023.antflix.net#392.80_(B)_(2))", + "displayTitle": "(2) Single-Conductor Cables (2001 Volts or Over)", + "children": [], + "url": "https://2023.antflix.net#392.80_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#392.80_(B)" + } + ], + "url": "https://2023.antflix.net#392.80" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_45_III" + }, + { + "displayTitle": "392.100 Construction", + "children": [ + { + "body": "Cable trays shall have suitable strength and rigidity to provide adequate support for all contained wiring. [392.100_(A)](https://2023.antflix.net#392.100_(A))", + "displayTitle": "(A) Strength and Rigidity", + "children": [], + "url": "https://2023.antflix.net#392.100_(A)" + }, + { + "body": "Cable trays shall not have sharp edges, burrs, or projections that could damage the insulation or jackets of the wiring. [392.100_(B)](https://2023.antflix.net#392.100_(B))", + "displayTitle": "(B) Smooth Edges", + "children": [], + "url": "https://2023.antflix.net#392.100_(B)" + }, + { + "body": "Cable tray systems shall be corrosion resistant. If made of ferrous material, the system shall be protected from corrosion as required by 300.6. [392.100_(C)](https://2023.antflix.net#392.100_(C))", + "displayTitle": "(C) Corrosion Protection", + "children": [], + "url": "https://2023.antflix.net#392.100_(C)" + }, + { + "body": "Cable trays shall have side rails or equivalent structural members. [392.100_(D)](https://2023.antflix.net#392.100_(D))", + "displayTitle": "(D) Side Rails", + "children": [], + "url": "https://2023.antflix.net#392.100_(D)" + }, + { + "body": "Cable trays shall include fittings or other suitable means for changes in direction and elevation of runs. [392.100_(E)](https://2023.antflix.net#392.100_(E))", + "displayTitle": "(E) Fittings", + "children": [], + "url": "https://2023.antflix.net#392.100_(E)" + }, + { + "body": "Nonmetallic cable trays shall be made of flame-retardant material. [392.100_(F)](https://2023.antflix.net#392.100_(F))", + "displayTitle": "(F) Nonmetallic Cable Tray", + "children": [], + "url": "https://2023.antflix.net#392.100_(F)" + } + ], + "url": "https://2023.antflix.net#392.100" + } + ], + "url": "https://2023.antflix.net#392" + }, + { + "displayTitle": "Article 393 Low-Voltage Suspended Ceiling Power Distribution Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_52_I" + }, + { + "body": "This article covers the installation of low-voltage suspended ceiling power distribution systems. [393.1](https://2023.antflix.net#393.1)", + "displayTitle": "393.1 Scope", + "children": [], + "url": "https://2023.antflix.net#393.1" + }, + { + "body": "Suspended ceiling power distribution systems and associated fittings shall be listed as in 393.6(A) or (B). [393.6](https://2023.antflix.net#393.6)", + "displayTitle": "393.6 Listing Requirements", + "children": [ + { + "body": "Low-voltage suspended ceiling distribution systems operating at 30 volts ac or less or 60 volts dc or less shall be listed as a complete system, with the utilization equipment, power supply, and fittings as part of the same identified system. [393.6_(A)](https://2023.antflix.net#393.6_(A))", + "displayTitle": "(A) Listed System", + "children": [], + "url": "https://2023.antflix.net#393.6_(A)" + }, + { + "body": "A low-voltage suspended ceiling power distribution system assembled from the following parts, listed according to the appropriate function, shall be permitted: Listed low-voltage utilization equipmentListed Class 2 power supplyListed or identified fittings, including connectors and grid rails with bare conductorsListed low-voltage cables in accordance with 722.179, conductors in raceways, or other fixed wiring methods for the secondary circuit [393.6_(B)](https://2023.antflix.net#393.6_(B))", + "displayTitle": "(B) Assembly of Listed Parts", + "children": [], + "url": "https://2023.antflix.net#393.6_(B)" + } + ], + "url": "https://2023.antflix.net#393.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_52_II" + }, + { + "body": "Low-voltage suspended ceiling power distribution systems shall be permanently connected and shall be permitted as follows: For listed utilization equipment capable of operation at a maximum of 30 volts ac (42.4 volts peak) or 60 volts dc (24.8 volts peak for dc interrupted at a rate of 10 Hz to 200 Hz) and limited to Class 2 power levels in Chapter 9, Table 11(A) and Table 11(B) for lighting, control, and signaling circuits.In indoor dry locations.For residential, commercial, and industrial installations.In other spaces used for environmental air in accordance with 300.22(C), electrical equipment having a metal enclosure, or with a nonmetallic enclosure and fittings, shall be listed for use within an air-handling space and shall have adequate fire-resistant and low-smoke-producing characteristics and associated wiring material suitable for the ambient temperature.Informational Note: See ANSI/UL 2043-2018, Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces, for one method of defining adequate fire-resistant and low-smoke-producing characteristics for electrical equipment with a nonmetallic enclosure. [393.10](https://2023.antflix.net#393.10)", + "displayTitle": "393.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#393.10" + }, + { + "body": "Suspended ceiling power distribution systems shall not be installed in the following: In damp or wet locationsWhere subject to corrosive fumes or vapors, such as storage battery roomsWhere subject to physical damageIn concealed locationsIn hazardous (classified) locationsAs part of a fire-rated floor-ceiling or roof-ceiling assembly, unless specifically listed as part of the assemblyFor lighting in general or critical patient care areas [393.12](https://2023.antflix.net#393.12)", + "displayTitle": "393.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#393.12" + }, + { + "displayTitle": "393.14 Installation", + "children": [ + { + "body": "Support wiring shall be installed in a neat and workmanlike manner. Cables and conductors installed exposed on the surface of ceilings and sidewalls shall be supported by the building structure in such a manner that the cable is not damaged by normal building use. Such cables shall be supported by straps, staples, hangers, cable ties listed and identified for securement and support, or similar fittings designed and installed so as not to damage the cable. Informational Note: Suspended ceiling low-voltage power grid distribution systems should be installed by qualified persons in accordance with the manufacturer's installation instructions. [393.14_(A)](https://2023.antflix.net#393.14_(A))", + "displayTitle": "(A) General Requirements", + "children": [], + "url": "https://2023.antflix.net#393.14_(A)" + }, + { + "body": "Exposed insulated secondary circuit conductors shall be listed, of the type, and installed as described as follows: Class 2 cable supplied by a listed Class 2 power source and installed in accordance with Part I of Article 722 and Parts I and II of Article 725Wiring methods described in Chapter 3 [393.14_(B)](https://2023.antflix.net#393.14_(B))", + "displayTitle": "(B) Insulated Conductors", + "children": [], + "url": "https://2023.antflix.net#393.14_(B)" + } + ], + "url": "https://2023.antflix.net#393.14" + }, + { + "displayTitle": "393.21 Disconnecting Means", + "children": [ + { + "body": "A disconnecting means for the Class 2 supply to the power grid system shall be located so as to be accessible and within sight of the Class 2 power source for servicing or maintenance of the grid system. [393.21_(A)](https://2023.antflix.net#393.21_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#393.21_(A)" + }, + { + "body": "Where connected to a multiwire branch circuit, the disconnecting means shall simultaneously disconnect all the supply conductors, including the grounded conductors. [393.21_(B)](https://2023.antflix.net#393.21_(B))", + "displayTitle": "(B) Multiwire Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#393.21_(B)" + } + ], + "url": "https://2023.antflix.net#393.21" + }, + { + "displayTitle": "393.30 Securing and Supporting", + "children": [ + { + "body": "A suspended ceiling low-voltage power distribution system shall be secured to the mounting surface of the building structure by hanging wires, screws, or bolts in accordance with the installation and operation instructions. Mounting hardware, such as screws or bolts, shall be either packaged with the suspended ceiling low-voltage lighting power distribution system, or the installation instructions shall specify the types of mounting fasteners to be used. [393.30_(A)](https://2023.antflix.net#393.30_(A))", + "displayTitle": "(A) Attached to Building Structure", + "children": [], + "url": "https://2023.antflix.net#393.30_(A)" + }, + { + "body": "The individual power grid rails shall be mechanically secured to the overall ceiling grid assembly. [393.30_(B)](https://2023.antflix.net#393.30_(B))", + "displayTitle": "(B) Attachment of Power Grid Rails", + "children": [], + "url": "https://2023.antflix.net#393.30_(B)" + } + ], + "url": "https://2023.antflix.net#393.30" + }, + { + "displayTitle": "393.40 Connectors and Enclosures", + "children": [ + { + "body": "Connections to busbar grid rails, cables, and conductors shall be made with listed insulating devices, and these connections shall be accessible after installation. A soldered connection shall be made mechanically secure before being soldered. Other means of securing leads, such as push-on terminals and spade-type connectors, shall provide a secure mechanical connection. The following connectors shall be permitted to be used as connection or interconnection devices: Load connectors shall be used for power from the busbar to listed utilization equipment.A pendant connector shall be permitted to suspend low-voltage luminaires or utilization equipment below the grid rail and to supply power from the busbar to the utilization equipment.A power feed connector shall be permitted to connect the power supply directly to a power distribution cable and to the busbar.Rail-to-rail connectors shall be permitted to interconnect busbars from one ceiling grid rail to another grid rail.Informational Note: See UL 310, Standard for Electrical Quick-Connect Terminals, for quick-connect terminals. See UL 486A-486B, Standard for Wire Connectors, for mechanical splicing devices. [393.40_(A)](https://2023.antflix.net#393.40_(A))", + "displayTitle": "(A) Connectors", + "children": [], + "url": "https://2023.antflix.net#393.40_(A)" + }, + { + "body": "Where made in a wall, connections shall be installed in an enclosure in accordance with Parts I, II, and III of Article 314. [393.40_(B)](https://2023.antflix.net#393.40_(B))", + "displayTitle": "(B) Enclosures", + "children": [], + "url": "https://2023.antflix.net#393.40_(B)" + } + ], + "url": "https://2023.antflix.net#393.40" + }, + { + "displayTitle": "393.45 Overcurrent and Reverse Polarity (Backfeed) Protection", + "children": [ + { + "body": "The listed Class 2 power supply or transformer primary shall be protected at not greater than 20 amperes. [393.45_(A)](https://2023.antflix.net#393.45_(A))", + "displayTitle": "(A) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#393.45_(A)" + }, + { + "body": "Listed Class 2 sources shall not have the output connections paralleled or otherwise interconnected unless listed for such interconnection. [393.45_(B)](https://2023.antflix.net#393.45_(B))", + "displayTitle": "(B) Interconnection of Power Sources", + "children": [], + "url": "https://2023.antflix.net#393.45_(B)" + }, + { + "body": "A suspended ceiling low-voltage power distribution system shall be permitted to have reverse polarity (backfeed) protection of dc circuits by one of the following means: If the power supply is provided as part of the system, the power supply is provided with reverse polarity (backfeed) protection; orIf the power supply is not provided as part of the system, reverse polarity or backfeed protection can be provided as part of the grid rail busbar or as a part of the power feed connector. [393.45_(C)](https://2023.antflix.net#393.45_(C))", + "displayTitle": "(C) Reverse Polarity (Backfeed) Protection of Direct-Current Systems", + "children": [], + "url": "https://2023.antflix.net#393.45_(C)" + } + ], + "url": "https://2023.antflix.net#393.45" + }, + { + "body": "A busbar splice shall be provided with insulation and mechanical protection equivalent to that of the grid rail busbars involved. [393.56](https://2023.antflix.net#393.56)", + "displayTitle": "393.56 Splices", + "children": [], + "url": "https://2023.antflix.net#393.56" + }, + { + "body": "Connections in busbar grid rails, cables, and conductors shall be made with listed insulating devices and be accessible after installation. Where made in a wall, connections shall be installed in an enclosure in accordance with Parts I, II, and III of Article 314, as applicable. [393.57](https://2023.antflix.net#393.57)", + "displayTitle": "393.57 Connections", + "children": [], + "url": "https://2023.antflix.net#393.57" + }, + { + "body": "The supply side of the Class 2 power source shall be connected to an equipment grounding conductor in accordance with the applicable requirements in Part IV of Article 250. [393.60](https://2023.antflix.net#393.60)", + "displayTitle": "393.60 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#393.60" + }, + { + "body": "Class 2 load side circuits for suspended ceiling low-voltage power grid distribution systems shall be permitted to be grounded. [393.61](https://2023.antflix.net#393.61)", + "displayTitle": "393.61 Grounding of Load Side of Class 2 Power Source", + "children": [], + "url": "https://2023.antflix.net#393.61" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_46_III" + }, + { + "displayTitle": "393.100 Sizes and Types of Conductors", + "children": [ + { + "body": "Current-carrying conductors for load side utilization equipment shall be copper and shall be 18 AWG minimum. Exception: Conductors of a size smaller than 18 AWG, but not smaller than 24 AWG, shall be permitted to be used for Class 2 circuits. Where used, these conductors shall be installed using a Chapter 3 wiring method, shall be totally enclosed, shall not be subject to movement or strain, and shall comply with the ampacity requirements in Table 522.22. [393.100_(A)](https://2023.antflix.net#393.100_(A))", + "displayTitle": "(A) Load Side Utilization Conductor Size", + "children": [], + "url": "https://2023.antflix.net#393.100_(A)" + }, + { + "body": "The power feed bus rail shall be 16 AWG minimum or equivalent. For a busbar with a circular cross section, the diameter shall be 1.29 mm (0.051 in.) minimum, and, for other than circular busbars, the area shall be 1.32 mm2 (0.002 in.2) minimum. [393.100_(B)](https://2023.antflix.net#393.100_(B))", + "displayTitle": "(B) Power Feed Bus Rail Conductor Size", + "children": [], + "url": "https://2023.antflix.net#393.100_(B)" + } + ], + "url": "https://2023.antflix.net#393.100" + } + ], + "url": "https://2023.antflix.net#393" + }, + { + "displayTitle": "Article 394 Concealed Knob-and-Tube Wiring", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_53_I" + }, + { + "body": "This article covers the use, installation, and construction specifications of concealed knob-and-tube wiring. [394.1](https://2023.antflix.net#394.1)", + "displayTitle": "394.1 Scope", + "children": [], + "url": "https://2023.antflix.net#394.1" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_53_II" + }, + { + "body": "Concealed knob-and-tube wiring shall be permitted to be installed in the hollow spaces of walls and ceilings, or in unfinished attics and roof spaces as provided by 394.23, only as follows: For extensions of existing installationsElsewhere by special permission [394.10](https://2023.antflix.net#394.10)", + "displayTitle": "394.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#394.10" + }, + { + "body": "Concealed knob-and-tube wiring shall not be used in the following: Commercial garagesTheaters and similar locationsMotion picture studiosHazardous (classified) locationsHollow spaces of walls, ceilings, and attics where such spaces are insulated by loose, rolled, or foamed-in-place insulating material that envelops the conductors [394.12](https://2023.antflix.net#394.12)", + "displayTitle": "394.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#394.12" + }, + { + "body": "Conductors shall comply with 398.17 where passing through holes in structural members. Where passing through wood cross members in plastered partitions, conductors shall be protected by noncombustible, nonabsorbent, insulating tubes extending not less than 75 mm (3 in.) beyond the wood member. [394.17](https://2023.antflix.net#394.17)", + "displayTitle": "394.17 Through or Parallel to Framing Members", + "children": [], + "url": "https://2023.antflix.net#394.17" + }, + { + "displayTitle": "394.19 Clearances", + "children": [ + { + "body": "A clearance of not less than 75 mm (3 in.) shall be maintained between conductors and a clearance of not less than 25 mm (1 in.) between the conductor and the surface over which it passes. [394.19_(A)](https://2023.antflix.net#394.19_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#394.19_(A)" + }, + { + "body": "Where space is too limited to provide these minimum clearances, such as at meters, panelboards, outlets, and switch points, the individual conductors shall be enclosed in flexible nonmetallic tubing, which shall be continuous in length between the last support and the enclosure or terminal point. [394.19_(B)](https://2023.antflix.net#394.19_(B))", + "displayTitle": "(B) Limited Conductor Space", + "children": [], + "url": "https://2023.antflix.net#394.19_(B)" + }, + { + "body": "Conductors shall comply with 398.19 for clearances from other exposed conductors, piping, and so forth. [394.19_(C)](https://2023.antflix.net#394.19_(C))", + "displayTitle": "(C) Clearance From Piping, Exposed Conductors, and So Forth", + "children": [], + "url": "https://2023.antflix.net#394.19_(C)" + } + ], + "url": "https://2023.antflix.net#394.19" + }, + { + "body": "Conductors in unfinished attics and roof spaces shall comply with 394.23(A) or (B). Informational Note: See 310.14(A)(3) for temperature limitation of conductors. [394.23](https://2023.antflix.net#394.23)", + "displayTitle": "394.23 In Accessible Attics", + "children": [ + { + "body": "Conductors shall be installed along the side of or through bored holes in floor joists, studs, or rafters. Where run through bored holes, conductors in the joists and in studs or rafters to a height of not less than 2.1 m (7 ft) above the floor or floor joists shall be protected by substantial running boards extending not less than 25 mm (1 in.) on each side of the conductors. Running boards shall be securely fastened in place. Running boards and guard strips shall not be required where conductors are installed along the sides of joists, studs, or rafters. [394.23_(A)](https://2023.antflix.net#394.23_(A))", + "displayTitle": "(A) Accessible by Stairway or Permanent Ladder", + "children": [], + "url": "https://2023.antflix.net#394.23_(A)" + }, + { + "body": "Conductors shall be installed along the sides of or through bored holes in floor joists, studs, or rafters. Exception: In buildings completed before the wiring is installed, attic and roof spaces that are not accessible by stairway or permanent ladder and have headroom at all points less than 900 mm (3 ft), the wiring shall be permitted to be installed on the edges of rafters or joists facing the attic or roof space. [394.23_(B)](https://2023.antflix.net#394.23_(B))", + "displayTitle": "(B) Not Accessible by Stairway or Permanent Ladder", + "children": [], + "url": "https://2023.antflix.net#394.23_(B)" + } + ], + "url": "https://2023.antflix.net#394.23" + }, + { + "displayTitle": "394.30 Securing and Supporting", + "children": [ + { + "body": "Conductors shall be rigidly supported on noncombustible, nonabsorbent insulating materials and shall not contact any other objects. Supports shall be installed as follows: Within 150 mm (6 in.) of each side of each tap or splice, andAt intervals not exceeding 1.4 m (41/2 ft).Where it is impracticable to provide supports, conductors shall be permitted to be fished through hollow spaces in dry locations, provided each conductor is individually enclosed in flexible nonmetallic tubing that is in continuous lengths between supports, between boxes, or between a support and a box. [394.30_(A)](https://2023.antflix.net#394.30_(A))", + "displayTitle": "(A) Supporting", + "children": [], + "url": "https://2023.antflix.net#394.30_(A)" + }, + { + "body": "Where solid knobs are used, conductors shall be securely tied thereto by tie wires having insulation equivalent to that of the conductor. [394.30_(B)](https://2023.antflix.net#394.30_(B))", + "displayTitle": "(B) Securing", + "children": [], + "url": "https://2023.antflix.net#394.30_(B)" + } + ], + "url": "https://2023.antflix.net#394.30" + }, + { + "body": "Switches shall comply with 404.4 and 404.10(B). [394.42](https://2023.antflix.net#394.42)", + "displayTitle": "394.42 Devices", + "children": [], + "url": "https://2023.antflix.net#394.42" + }, + { + "body": "Splices shall be soldered unless approved splicing devices are used. In-line or strain splices shall not be used. [394.56](https://2023.antflix.net#394.56)", + "displayTitle": "394.56 Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#394.56" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_47_III" + }, + { + "body": "Conductors shall be of a type identified in Table 310.4(1). [394.104](https://2023.antflix.net#394.104)", + "displayTitle": "394.104 Conductors", + "children": [], + "url": "https://2023.antflix.net#394.104" + } + ], + "url": "https://2023.antflix.net#394" + }, + { + "displayTitle": "Article 395 Outdoor Overhead Conductors Over 1000 Volts", + "children": [ + { + "body": "This article covers the use and installation for outdoor overhead conductors over 1000 volts, nominal. [395.1](https://2023.antflix.net#395.1)", + "displayTitle": "395.1 Scope", + "children": [], + "url": "https://2023.antflix.net#395.1" + }, + { + "body": "Outdoor overhead conductors over 1000 volts, nominal, shall be permitted only for systems rated over 1000 volts, nominal, as follows: Outdoors in free airFor service conductors, feeders, or branch circuitsInformational Note: See IEEE C2, National Electrical Safety Code, and ANSI/IEEE 3001.2, Recommended Practice for Evaluating the Electrical Service Requirements of Industrial and Commercial Power Systems, for additional information on outdoor overhead conductors over 1000 volts. [395.10](https://2023.antflix.net#395.10)", + "displayTitle": "395.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#395.10" + }, + { + "displayTitle": "395.30 Support", + "children": [ + { + "body": "Documentation of the engineered design by a licensed professional engineer engaged primarily in the design of such systems for the spacing between conductors shall be available upon request of the authority having jurisdiction and shall include consideration of the following: Applied voltageConductor sizeDistance between support structuresType of structureWind/ice loadingSurge protection [395.30_(A)](https://2023.antflix.net#395.30_(A))", + "displayTitle": "(A) Conductors", + "children": [], + "url": "https://2023.antflix.net#395.30_(A)" + }, + { + "body": "Structures of wood, metal, or concrete, or combinations of those materials, shall be provided for support of overhead conductors over 1000 volts, nominal. Documentation of the engineered design by a licensed professional engineer engaged primarily in the design of such systems and the installation of each support structure shall be available upon request of the authority having jurisdiction and shall include consideration of the following: Soil conditionsFoundations and structure settingsWeight of all supported conductors and equipmentWeather loading and other conditions such as, but not limited to, ice, wind, temperature, and lightningAngle where change of direction occursSpans between adjacent structuresEffect of dead-end structuresStrength of guy wires and guy anchorsStructure size and material(s)Hardware [395.30_(B)](https://2023.antflix.net#395.30_(B))", + "displayTitle": "(B) Structures", + "children": [], + "url": "https://2023.antflix.net#395.30_(B)" + }, + { + "body": "Insulators used to support conductors shall be rated for all of the following:\n\nApplied phase-to-phase voltage\nMechanical strength required for each individual installation\nImpulse withstand BIL in accordance with Table 495.24\n\nInformational Note: See 395.30(A), (B), and (C), which are not all-inclusive lists. [395.30_(C)](https://2023.antflix.net#395.30_(C))", + "displayTitle": "(C) Insulators", + "children": [], + "url": "https://2023.antflix.net#395.30_(C)" + } + ], + "url": "https://2023.antflix.net#395.30" + } + ], + "url": "https://2023.antflix.net#395" + }, + { + "displayTitle": "Article 396 Messenger-Supported Wiring", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_54_I" + }, + { + "body": "This article covers the use, installation, and construction specifications for messenger-supported wiring. [396.1](https://2023.antflix.net#396.1)", + "displayTitle": "396.1 Scope", + "children": [], + "url": "https://2023.antflix.net#396.1" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_54_II" + }, + { + "displayTitle": "396.10 Uses Permitted", + "children": [ + { + "body": "The cable types in Table 396.10(A) shall be permitted to be installed in messenger-supported wiring under the conditions described in the article or section referenced for each.Table 396.10(A) Cable Types Cable Type Section Article Medium-voltage cable 315 Metal-clad cable 330 Mineral-insulated, metal-sheathed cable 332 Multiconductor service-entrance cable 338 Multiconductor underground feeder and branch-circuit cable 340 Other factory-assembled, multiconductor control, signal, or power cables that are identified for the use Power and control tray cable 336 Power-limited tray cable Table 722.135(B), 722.135(C), and 722.179(A)(6) [396.10_(A)](https://2023.antflix.net#396.10_(A))", + "displayTitle": "(A) Cable Types", + "children": [], + "url": "https://2023.antflix.net#396.10_(A)" + }, + { + "body": "In industrial establishments only, where conditions of maintenance and supervision ensure that only qualified persons service the installed messenger-supported wiring, the following shall be permitted: Any of the conductor types shown in Table 310.4(1) or Table 310.4(2)MV cableWhere exposed to weather, conductors shall be listed for use in wet locations. Where exposed to direct rays of the sun, conductors or cables shall be sunlight resistant. [396.10_(B)](https://2023.antflix.net#396.10_(B))", + "displayTitle": "(B) In Industrial Establishments", + "children": [], + "url": "https://2023.antflix.net#396.10_(B)" + }, + { + "body": "Messenger-supported wiring shall be permitted to be used in hazardous (classified) locations where the contained cables and messenger-supported wiring are specifically permitted by other articles in this Code. [396.10_(C)](https://2023.antflix.net#396.10_(C))", + "displayTitle": "(C) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#396.10_(C)" + } + ], + "url": "https://2023.antflix.net#396.10" + }, + { + "body": "Messenger-supported wiring shall not be used in hoistways or where subject to physical damage. [396.12](https://2023.antflix.net#396.12)", + "displayTitle": "396.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#396.12" + }, + { + "displayTitle": "396.30 Messenger", + "children": [ + { + "body": "The messenger shall be supported at dead ends and at intermediate locations so as to eliminate tension on the conductors. The conductors shall not be permitted to come into contact with the messenger supports or any structural members, walls, or pipes. [396.30_(A)](https://2023.antflix.net#396.30_(A))", + "displayTitle": "(A) Support", + "children": [], + "url": "https://2023.antflix.net#396.30_(A)" + }, + { + "body": "Where the messenger is used as a neutral conductor, it shall comply with the requirements of 225.4, 250.184(A), 250.184(B)(7), and 250.187(B). [396.30_(B)](https://2023.antflix.net#396.30_(B))", + "displayTitle": "(B) Neutral Conductor", + "children": [], + "url": "https://2023.antflix.net#396.30_(B)" + }, + { + "body": "Where the messenger is used as an equipment grounding conductor, it shall comply with the requirements of 250.32(B), 250.118, 250.184(B)(8), and 250.187(D). [396.30_(C)](https://2023.antflix.net#396.30_(C))", + "displayTitle": "(C) Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#396.30_(C)" + } + ], + "url": "https://2023.antflix.net#396.30" + }, + { + "body": "Conductor splices and taps made and insulated by approved methods shall be permitted in messenger-supported wiring. [396.56](https://2023.antflix.net#396.56)", + "displayTitle": "396.56 Conductor Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#396.56" + }, + { + "body": "The messenger shall be grounded as required by 250.80 and 250.86 for enclosure grounding. [396.60](https://2023.antflix.net#396.60)", + "displayTitle": "396.60 Grounding", + "children": [], + "url": "https://2023.antflix.net#396.60" + } + ], + "url": "https://2023.antflix.net#396" + }, + { + "displayTitle": "Article 398 Open Wiring on Insulators", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_55_I" + }, + { + "body": "This article covers the use, installation, and construction specifications of open wiring on insulators. [398.1](https://2023.antflix.net#398.1)", + "displayTitle": "398.1 Scope", + "children": [], + "url": "https://2023.antflix.net#398.1" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_55_II" + }, + { + "body": "Open wiring on insulators shall be permitted only for industrial or agricultural establishments on systems of 1000 volts, nominal, or less, as follows: Indoors or outdoorsIn wet or dry locationsWhere subject to corrosive vaporsFor services [398.10](https://2023.antflix.net#398.10)", + "displayTitle": "398.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#398.10" + }, + { + "body": "Open wiring on insulators shall not be installed where concealed by the building structure. [398.12](https://2023.antflix.net#398.12)", + "displayTitle": "398.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#398.12" + }, + { + "displayTitle": "398.15 Exposed Work", + "children": [ + { + "body": "In dry locations, where not exposed to physical damage, conductors shall be permitted to be separately enclosed in flexible nonmetallic tubing. The tubing shall be in continuous lengths not exceeding 4.5 m (15 ft) and secured to the surface by straps at intervals not exceeding 1.4 m (41/2 ft). [398.15_(A)](https://2023.antflix.net#398.15_(A))", + "displayTitle": "(A) Dry Locations", + "children": [], + "url": "https://2023.antflix.net#398.15_(A)" + }, + { + "body": "Conductors entering or leaving locations subject to dampness, wetness, or corrosive vapors shall have drip loops formed on them and shall then pass upward and inward from the outside of the buildings, or from the damp, wet, or corrosive location, through noncombustible, nonabsorbent insulating tubes. Informational Note: See 230.52 for individual conductors entering buildings or other structures. [398.15_(B)](https://2023.antflix.net#398.15_(B))", + "displayTitle": "(B) Entering Spaces Subject to Dampness, Wetness, or Corrosive Vapors", + "children": [], + "url": "https://2023.antflix.net#398.15_(B)" + }, + { + "body": "Conductors within 2.1 m (7 ft) from the floor shall be considered exposed to physical damage. Where open conductors cross ceiling joists and wall studs and are exposed to physical damage, they shall be protected by one of the following methods: Guard strips shall not be less than 25 mm (1 in.) nominal in thickness and at least as high as the insulating supports, placed on each side of and close to the wiring.A substantial running board at least 13 mm (1/2 in.) thick in back of the conductors with side protections. Running boards shall extend at least 25 mm (1 in.) outside the conductors, but not more than 50 mm (2 in.), and the protecting sides shall be at least 50 mm (2 in.) high and at least 25 mm (1 in.), nominal, in thickness.Boxing made in accordance with 398.15(C)(1) or (C)(2) and furnished with a cover kept at least 25 mm (1 in.) away from the conductors within. Where protecting vertical conductors on side walls, the boxing shall be closed at the top and the holes through which the conductors pass shall be bushed.Rigid metal conduit (RMC), intermediate metal conduit (IMC), rigid polyvinyl chloride conduit (PVC), reinforced thermosetting resin conduit (RTRC), or electrical metallic tubing (EMT). When installed in metal piping, the conductors shall be encased in continuous lengths of approved flexible tubing. [398.15_(C)](https://2023.antflix.net#398.15_(C))", + "displayTitle": "(C) Exposed to Physical Damage", + "children": [], + "url": "https://2023.antflix.net#398.15_(C)" + } + ], + "url": "https://2023.antflix.net#398.15" + }, + { + "body": "Open conductors shall be separated from contact with walls, floors, wood cross members, or partitions through which they pass by tubes or bushings of noncombustible, nonabsorbent insulating material. Where the bushing is shorter than the hole, a waterproof sleeve of noninductive material shall be inserted in the hole and an insulating bushing slipped into the sleeve at each end in such a manner as to keep the conductors absolutely out of contact with the sleeve. Each conductor shall be carried through a separate tube or sleeve. Informational Note: See 310.14(A)(3) for temperature limitation of conductors. [398.17](https://2023.antflix.net#398.17)", + "displayTitle": "398.17 Through or Parallel to Framing Members", + "children": [], + "url": "https://2023.antflix.net#398.17" + }, + { + "body": "Open conductors shall be separated at least 50 mm (2 in.) from metal raceways, piping, or other conducting material, and from any exposed lighting, power, or signaling conductor, or shall be separated therefrom by a continuous and firmly fixed nonconductor in addition to the insulation of the conductor. Where any insulating tube is used, it shall be secured at the ends. Where practicable, conductors shall pass over rather than under any piping subject to leakage or accumulations of moisture. [398.19](https://2023.antflix.net#398.19)", + "displayTitle": "398.19 Clearances", + "children": [], + "url": "https://2023.antflix.net#398.19" + }, + { + "body": "Conductors in unfinished attics and roof spaces shall comply with 398.23(A) or (B). [398.23](https://2023.antflix.net#398.23)", + "displayTitle": "398.23 In Accessible Attics", + "children": [ + { + "body": "Conductors shall be installed along the side of or through bored holes in floor joists, studs, or rafters. Where run through bored holes, conductors in the joists and in studs or rafters to a height of not less than 2.1 m (7 ft) above the floor or floor joists shall be protected by substantial running boards extending not less than 25 mm (1 in.) on each side of the conductors. Running boards shall be securely fastened in place. Running boards and guard strips shall not be required for conductors installed along the sides of joists, studs, or rafters. [398.23_(A)](https://2023.antflix.net#398.23_(A))", + "displayTitle": "(A) Accessible by Stairway or Permanent Ladder", + "children": [], + "url": "https://2023.antflix.net#398.23_(A)" + }, + { + "body": "Conductors shall be installed along the sides of or through bored holes in floor joists, studs, or rafters. Exception: In buildings completed before the wiring is installed, in attic and roof spaces that are not accessible by stairway or permanent ladder and have headroom at all points less than 900 mm (3 ft), the wiring shall be permitted to be installed on the edges of rafters or joists facing the attic or roof space. [398.23_(B)](https://2023.antflix.net#398.23_(B))", + "displayTitle": "(B) Not Accessible by Stairway or Permanent Ladder", + "children": [], + "url": "https://2023.antflix.net#398.23_(B)" + } + ], + "url": "https://2023.antflix.net#398.23" + }, + { + "displayTitle": "398.30 Securing and Supporting", + "children": [ + { + "body": "Conductors smaller than 8 AWG shall be rigidly supported on noncombustible, nonabsorbent insulating materials and shall not contact any other objects. Supports shall be installed as follows: Within 150 mm (6 in.) from a tap or spliceWithin 300 mm (12 in.) of a dead-end connection to a lampholder or receptacleAt intervals not exceeding 1.4 m (41/2 ft) and at closer intervals sufficient to provide adequate support where likely to be disturbed [398.30_(A)](https://2023.antflix.net#398.30_(A))", + "displayTitle": "(A) Conductor Sizes Smaller Than 8 AWG", + "children": [], + "url": "https://2023.antflix.net#398.30_(A)" + }, + { + "body": "Supports for conductors 8 AWG or larger installed across open spaces shall be permitted up to 4.5 m (15 ft) apart if noncombustible, nonabsorbent insulating spacers are used at least every 1.4 m (41/2 ft) to maintain at least 65 mm (21/2 in.) between conductors. Where not likely to be disturbed in buildings of mill construction, 8 AWG and larger conductors shall be permitted to be run across open spaces if supported from each wood cross member on approved insulators maintaining 150 mm (6 in.) between conductors. [398.30_(B)](https://2023.antflix.net#398.30_(B))", + "displayTitle": "(B) Conductor Sizes 8 AWG and Larger", + "children": [], + "url": "https://2023.antflix.net#398.30_(B)" + }, + { + "body": "In industrial establishments only, where conditions of maintenance and supervision ensure that only qualified persons service the system, conductors of sizes 250 kcmil and larger shall be permitted to be run across open spaces where supported at intervals up to 9.0 m (30 ft) apart. [398.30_(C)](https://2023.antflix.net#398.30_(C))", + "displayTitle": "(C) Industrial Establishments", + "children": [], + "url": "https://2023.antflix.net#398.30_(C)" + }, + { + "body": "Where nails are used to mount knobs, they shall not be smaller than tenpenny. Where screws are used to mount knobs, or where nails or screws are used to mount cleats, they shall be of a length sufficient to penetrate the wood to a depth equal to at least one-half the height of the knob and the full thickness of the cleat. Cushion washers shall be used with nails. [398.30_(D)](https://2023.antflix.net#398.30_(D))", + "displayTitle": "(D) Mounting of Conductor Supports", + "children": [], + "url": "https://2023.antflix.net#398.30_(D)" + }, + { + "body": "Conductors 8 AWG or larger and supported on solid knobs shall be securely tied thereto by tie wires having an insulation equivalent to that of the conductor. [398.30_(E)](https://2023.antflix.net#398.30_(E))", + "displayTitle": "(E) Tie Wires", + "children": [], + "url": "https://2023.antflix.net#398.30_(E)" + } + ], + "url": "https://2023.antflix.net#398.30" + }, + { + "body": "Surface-type snap switches shall be mounted in accordance with 404.10(A), and boxes shall not be required. Other type switches shall be installed in accordance with 404.4. [398.42](https://2023.antflix.net#398.42)", + "displayTitle": "398.42 Devices", + "children": [], + "url": "https://2023.antflix.net#398.42" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_48_III" + }, + { + "body": "Conductors shall be of a type identified in Table 310.4(1). [398.104](https://2023.antflix.net#398.104)", + "displayTitle": "398.104 Conductors", + "children": [], + "url": "https://2023.antflix.net#398.104" + } + ], + "url": "https://2023.antflix.net#398" + } + ], + "url": "https://2023.antflix.net#3" + } + ], + "Chapter 4 Equipment for General Use": [ + { + "displayTitle": "Chapter 4 Equipment for General Use", + "children": [ + { + "displayTitle": "Article 400 Flexible Cords and Flexible Cables", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_56_I" + }, + { + "body": "This article covers general requirements, applications, and construction specifications for flexible cords and flexible cables. [400.1](https://2023.antflix.net#400.1)", + "displayTitle": "400.1 Scope", + "children": [], + "url": "https://2023.antflix.net#400.1" + }, + { + "body": "Flexible cords and flexible cables shall comply with this article and with the applicable provisions of other articles of this Code. [400.2](https://2023.antflix.net#400.2)", + "displayTitle": "400.2 Other Articles", + "children": [], + "url": "https://2023.antflix.net#400.2" + }, + { + "body": "Flexible cords and flexible cables and their associated fittings shall be suitable for the conditions of use and location. [400.3](https://2023.antflix.net#400.3)", + "displayTitle": "400.3 Suitability", + "children": [], + "url": "https://2023.antflix.net#400.3" + }, + { + "body": "Flexible cords and flexible cables shall conform to the description in Table 400.4. The use of flexible cords and flexible cables other than those in Table 400.4 shall require permission by the authority having jurisdiction.\nTable 400.4 Flexible Cords and Flexible Cables\n\n\n\nTrade Name\nType Letter\nVoltage\nAWG or kcmil\nNumber of Conductors\nInsulation\nAWG or kcmil\nNominal Insulation Thickness\nBraid on Each Conductor\nOuter Covering\nUse\n\n\nmm\nmils\n\n\n\n\nLamp cord\nC\n300600\n18\u20141615\u201410\n2 or more\nThermoset or thermoplastic\n18\u20141615\u201410\n0.761.14\n3045\nCotton\nNone\nPendant or portable\nDry locations\nNot hard usage\n\n\nElevator cable\nE 1,2,3,4\n300 or 600\n20\u20142\n2 or more\nThermoset\n20\u20141615\u20141212\u2014108\u20142\n0.510.761.141.52\n20304560\nCotton\nThree cotton; outer one flame-retardant and moisture-resistant\nElevator lighting and control\nUnclassified locations\n\n\n20\u20141615\u20141212\u2014108\u20142\n0.510.761.141.52\n20304560\nFlexible nylon jacket\n\n\nElevator cable\nEO 1,2,4\n300 or 600\n20\u20142\n2 or more\nThermoset\n20\u20141615\u20141212\u2014108\u20142\n0.510.761.141.52\n20304560\nCotton\nThree cotton; outer one flame-retardant and moisture-resistant\nElevator lighting and control\nUnclassified locations\n\n\nOne cotton and a neoprene jacket\nHazardous (classified) locations\n\n\nElevator cable\nETP 2,4\n300 or 600\n \n \n \n \n \n \nRayon\nThermoplastic\nHazardous (classified) locations\n\n\nETT 2,4\n300 or 600\nNone\nOne cotton or equivalent and a thermoplastic jacket\n\n\nElectric vehicle cable\nEV 5,6\n1000\n18\u2014500\n2 or more plus equipment grounding conductor(s), plus optional hybrid data, signal communications, and optical fiber cables\nThermoset with optional nylon\n18\u201415\n0.76(0.51)\n30(20)\nOptional\nOil-resistant thermoset\nElectric vehicle charging\nWet locations\nExtra hard usage\n\n\n14\u201410\n1.14(0.76)\n45(30)\n\n\n8\u20142\n1.52(1.14)\n60(45)\n\n\n1\u20144/0\n2.03(1.52)\n80(60)\n\n\n250\u2014500\n2.41(1.90)\n95(75)\n\n\nEVJ5,6\n300\n18\u201412\n18\u201412\n0.76(0.51)\n30(20)\nHard usage\n\n\nEVE 5,6\n1000\n18\u2014500\n2 or more plus equipment grounding conductor(s), plus optional hybrid data, signal communications, and optical fiber cables\nThermoplastic elastomer with optional nylon\n18\u201415\n0.76(0.51)\n30(20)\nOil-resistant thermoplastic elastomer\nExtra-hard usage\n\n\n14\u201410\n1.14(0.76)\n45(30)\n\n\n8\u20142\n1.52(1.14)\n60(45)\n\n\n1\u20144/0\n2.03(1.52)\n80(60)\n\n\n250\u2014500\n2.41(1.90)\n95(75)\n\n\nEVJE 5,6\n300\n18\u201412\n18\u201412\n0.76(0.51)\n30(20)\nHard usage\n\n\nEVT 5,6\n1000\n18\u2014500\n2 or more plus equipment grounding conductor(s), plus optional hybrid data, signal communications, and optical fiber cables\nThermoplastic with optional nylon\n18\u201415\n0.76(0.51)\n30(20)\nOptional\nOil-resistant thermoplastic\nElectric vehicle charging\nWet Locations\nExtra-hard usage\n\n\n14\u201410\n1.14(0.76)\n45(30)\n\n\n8\u20142\n1.52(1.14)\n60(45)\n\n\n1\u20144/0\n2.03(1.52)\n80(60)\n\n\n250\u2014500\n2.41(1.90)\n95(75)\n\n\nEVJT 5,6\n300\n18\u201412\n18\u201412\n0.76(0.51)\n30(20)\nHard usage\n\n\nPortable power cable\nG\n2000\n12\u2014500\n2\u20146 plus equipment grounding conductor(s)\nThermoset\n12\u201421\u20144/0250\u2014500\n1.522.032.41\n608095\n \nOil-resistant thermoset\nPortable and extra-hard usage\n\n\nG-GC7\n2000\n12\u2014500\n3\u20146 plus equipment grounding conductors and 1 ground check conductor\nThermoset\n12\u201421\u20144/0250\u2014500\n1.522.032.41\n608095\n \nOil-resistant thermoset\n\n\nHeater cord\nHPD\n300\n18\u201412\n2, 3, or 4\nThermoset\n18\u20141615\u201412\n0.380.76\n1530\nNone\nCotton or rayon\nPortable heaters\nDry locations\nNot hard usage\n\n\nParallel heater cord\nHPN8\n300\n18\u201412\n2 or 3\nOil-resistant thermoset\n18\u201416151412\n1.141.522.41\n456095\nNone\nOil-resistant thermoset\nPortable\nDamp locations\nNot hard usage\n\n\nThermoset jacketed heater cords\nHSJ\n300\n18\u201412\n2, 3, or 4\nThermoset\n18\u20141615\u201412\n0.761.14\n3045\nNone\nCotton and thermoset\nPortable or portable heater\nDamp locations\nHard usage\n\n\nHSJW\n300\n18\u201412\nThermoset\nCotton and thermoset\nDamp locations\n\n\nHSJO\n300\n18\u201412\nOil-resistant thermoset\nCotton and oil-resistant thermoset\nDamp and wet locations\n\n\nHSJOW9\n300\n18\u201412\nDamp locations\n\n\nHSJOO\n300\n18\u201412\n\n\nHSJOOW9\n300\n18\u201412\nDamp and wet locations\n\n\nNon-integral parallel cords\nNISP-1\n300\n20\u201418\n2 or 3\nThermoset\n20\u201418\n0.38\n15\nNone\nThermoset\nPendant or portable\nDamp locations\nNot hard usage\n\n\nNISP-2\n300\n18\u201416\n18\u201416\n0.76\n30\n\n\nNISPE-18\n300\n20\u201418\nThermoplastic elastomer\n20\u201418\n0.38\n15\nThermoplastic elastomer\n\n\nNISPE-28\n300\n18\u201416\n18\u201416\n0.76\n30\n\n\nNISPT-18\n300\n20\u201418\nThermoplastic\n20\u201418\n0.38\n15\nThermoplastic\n\n\nNISPT-28\n300\n18\u201416\n18\u201416\n0.76\n30\n\n\nTwisted portable cord\nPD\n300600\n18\u20141614\u201410\n2 or more\nThermoset or thermoplastic\n18\u20141615\u201410\n0.761.14\n3045\nCotton\nCotton or rayon\nPendant or portable\nDry locations\nNot hard usage\n\n\nPortable power cable\nPPE7\n2000\n12\u2014500\n1\u20146 plus optional equipment grounding conductor(s)\nThermoplastic elastomer\n12\u201421\u20144/0250\u2014500\n1.522.032.41\n608095\n \nOil-resistant thermoplastic elastomer\nPortable, extra-hard usage\n\n\nHard service cord\nS7\n600\n18\u20142\n2 or more\nThermoset\n18\u20141514\u2014108\u20142\n0.761.141.52\n304560\nNone\nThermoset\nPendant or portable\nDamp locations\nExtra-hard usage\n\n\nFlexible stage and lighting power cable\nSC7,10\n600\n8\u2014250\n1 or more\nThermoset\n8\u201421\u20144/0250\n1.522.032.41\n608095\n \nThermoset\nPortable, extra-hard usage\n\n\nSCE7,10\n600\nThermoplastic elastomer\nThermoplastic elastomer\n\n\nSCT7,10\n600\nThermoplastic\nThermoplastic\n\n\nHard service cord\nSE7\n600\n18\u20142\n2 or more\nThermoplastic elastomer\n18\u20141514\u201498\u20142\n0.761.141.52\n304560\nNone\nThermoplastic elastomer\nPendant or portable\nDamp locations\nExtra-hard usage\n\n\nSEW7,9\n600\nDamp and wet locations\n\n\nSEO7\n600\nOil-resistant thermoplastic elastomer\nDamp locations\n\n\nSEOW7,9\n600\nDamp and wet locations\n\n\nSEOO7\n600\nOil-resistant thermoplastic elastomer\nDamp locations\n\n\nSEOOW7,9\n600\nDamp and wet locations\n\n\nJunior hard service cord\nSJ\n300\n18\u201410\n2\u20146\nThermoset\n18\u20141110\n0.761.14\n3045\nNone\nThermoset\nPendant or portable\nDamp locations\nHard usage\n\n\nSJE\n300\nThermoplastic elastomer\nThermoplastic elastomer\n\n\nSJEW9\n300\nDamp and wet locations\n\n\nSJEO\n300\nOil-resistant thermoplastic elastomer\nDamp locations\n\n\nSJEOW9\n300\nDamp and wet locations\n\n\nSJEOO\n300\nOil-resistant thermoplastic elastomer\nDamp locations\n\n\nSJEOOW9\n300\nDamp and wet locations\n\n\nSJO\n300\nThermoset\nOil-resistant thermoset\nDamp locations\n\n\nSJOW9\n300\n \n \n \n18\u201412 10\n0.761.14\n3045\n \n \n \nDamp and wet locations\n \n\n\nSJOO\n300\nOil-resistant thermoset\nDamp locations\n\n\nSJOOW9\n300\nDamp and wet locations\n\n\nSJT\n300\nThermoplastic\nThermoplastic\nDamp locations\n\n\nSJTW9\n300\nDamp and wet locations\n\n\nSJTO\n300\nOil-resistant thermoplastic\nDamp locations\n\n\nSJTOW9\n300\nDamp and wet locations\n\n\nSJTOO\n300\nOil-resistant thermoplastic\nDamp locations\n\n\nSJTOOW9\n300\nDamp and wet locations\n\n\nHard service cord\nSO7\n600\n18\u20142\n2 or more\nThermoset\n18\u201415\n0.76\n30\nNone\nOil-resistant thermoset\nPendant or portable\nDamp locations\nExtra-hard usage\n\n\nSOW7,9\n600\nDamp and wet locations\n\n\nSOO7\n600\nOil-resistant thermoset\n14\u201498\u20142\n1.141.52\n4560\nDamp locations\n\n\nSOOW7,9\n600\nDamp and wet locations\n\n\nAll thermoset parallel cord\nSP-1\n300\n20\u201418\n2 or 3\nThermoset\n20\u201418\n0.76\n30\nNone\nNone\nPendant or portable\nDamp locations\nNot hard usage\n\n\nSP-2\n300\n18\u201416\n18\u201416\n1.14\n45\n\n\nSP-3\n300\n18\u201410\n18\u20141615\u2014141210\n1.522.032.412.80\n608095110\nRefrigerators, room air conditioners, and as permitted in 422.16(B)\n\n\nAll elastomer (thermoplastic) parallel cord\nSPE-18\n300\n20\u201418\n2 or 3\nThermoplastic elastomer\n20\u201418\n0.76\n30\nNone\nNone\nPendant or portable\nDamp locations\nNot hard usage\n\n\nSPE-28\n300\n18\u201416\n18\u201416\n1.14\n45\n\n\nSPE-38\n300\n18\u201410\n18\u20141615\u2014141210\n1.522.032.412.80\n608095110\nRefrigerators, room air conditioners, and as permitted in 422.16(B)\n\n\nAll thermoplastic parallel cord\nSPT-1\n300\n20\u201418\n2 or 3\nThermoplastic\n20\u201418\n0.76\n30\nNone\nNone\nPendant or portable\nDamp locations\nNot hard usage\n\n\nSPT-1W9\n300\n2\nDamp and wet locations\n\n\nSPT-2\n300\n18\u201416\n2 or 3\n18\u201416\n1.14\n45\nDamp locations\n\n\nSPT-2W9\n300\n2\nDamp and wet locations\n\n\nSPT-3\n300\n18\u201410\n2 or 3\n18\u20141615\u2014141210\n1.522.032.412.80\n608095110\nRefrigerators, room air conditioners, and as permitted in 422.16(B)\nDamp locations\nNot hard usage\n\n\nRange, dryer cable\nSRD\n300\n10\u20144\n3 or 4\nThermoset\n10\u20144\n1.14\n45\nNone\nThermoset\nPortable\nDamp locations\nRanges, dryers\n\n\nSRDE\n300\n10\u20144\n3 or 4\nThermoplastic elastomer\nNone\nThermoplastic elastomer\n\n\nSRDT\n300\n10\u20144\n3 or 4\nThermoplastic\nNone\nThermoplastic\n\n\nHard service cord\nST7\n600\n18\u20142\n2 or more\nThermoplastic\n18\u20141514\u201498\u20142\n0.761.141.52\n304560\nNone\nThermoplastic\nPendant or portable\nDamp locations\nExtra-hard usage\n\n\nSTW7,9\n600\nDamp and wet locations\n\n\nSTO7\n600\nOil-resistant thermoplastic\nDamp locations\n\n\nSTOW7,9\n600\nDamp and wet locations\n\n\nSTOO7\n600\nOil-resistant thermoplastic\nDamp locations\n\n\nSTOOW7\n600\nDamp and wet locations\n\n\nVacuum cleaner cord\nSV\n300\n18\u201416\n2 or 3\nThermoset\n18\u201416\n0.38\n15\nNone\nThermoset\nPendant or portable\nDamp locations\nNot hard usage\n\n\nSVE\n300\nThermoplastic elastomer\nThermoplastic elastomer\n\n\nSVEO\n300\nOil-resistant thermoplastic elastomer\n\n\nSVEOO\n300\nOil-resistant thermoplastic elastomer\n\n\nSVO\n300\nThermoset\nOil-resistant thermoset\n\n\nSVOO\n300\nOil-resistant thermoset\nOil-resistant thermoset\n\n\nSVT\n300\nThermoplastic\nThermoplastic\n\n\nSVTO\n300\nThermoplastic\nOil-resistant thermoplastic\n\n\nSVTOO\n300\nOil-resistant thermoplastic\n\n\nParallel tinsel cord\nTPT11\n300\n27\n2\nThermoplastic\n27\n0.76\n30\nNone\nThermoplastic\nAttached to an appliance\nDamp locations\nNot hard usage\n\n\nJacketed tinsel cord\nTST11\n300\n27\n2\nThermoplastic\n27\n0.38\n15\nNone\nThermoplastic\nAttached to an appliance\nDamp locations\nNot hard usage\n\n\nPortable power cable\nW7\n2000\n12\u2014500501\u20141000\n1\u201461\nThermoset\n12\u201421\u20144/0250\u2014500501\u20141000\n1.522.032.412.80\n608095110\n \nOil-resistant thermoset\nPortable, extra-hard usage\n\n\n\nNotes:\nAll types listed in Table 400.4 shall have individual conductors twisted together, except for Types HPN, SP-1, SP-2, SP-3, SPE-1, SPE-2, SPE-3, SPT-1, SPT-2, SPT-3, SPT-1W, SPT-2W, TPT, NISP-1, NISP-2, NISPT-1, NISPT-2, NISPE-1, NISPE-2, and three-conductor parallel versions of SRD, SRDE, and SRDT.\nThe individual conductors of all cords, except those of heat-resistant cords, shall have a thermoset or thermoplastic insulation, except that the equipment grounding conductor, where used, shall be in accordance with 400.23(B).\n1Rubber-filled or varnished cambric tapes shall be permitted as a substitute for the inner braids.\n2Elevator traveling cables for operating control and signal circuits shall contain nonmetallic fillers as necessary to maintain concentricity. Cables shall have steel supporting members as required for suspension by 620.41. In locations subject to excessive moisture or corrosive vapors or gases, supporting members of other materials shall be permitted. Where steel supporting members are used, they shall run straight through the center of the cable assembly and shall not be cabled with the copper strands of any conductor.\nIn addition to conductors used for control and signaling circuits, Types E, EO, ETP, and ETT elevator cables shall be permitted to incorporate in the construction one or more of the following: optical fibers; 24 AWG or larger telephone conductor pairs, coaxial cables, or communications cables. The 24 AWG or larger conductor pairs shall be permitted to be covered with suitable shielding for telephone, audio, data transfer, or higher frequency communications circuits; the coaxial cables shall consist of a center conductor, insulation, and a shield for use in video or other radio frequency communications circuits. The optical fiber shall be suitably covered with flame-retardant thermoplastic. The insulation of the conductors shall be rubber or thermoplastic of a thickness not less than specified for the other conductors of the particular type of cable. Metallic shields shall have their own protective covering. Where used, these components shall be permitted to be incorporated in any layer of the cable assembly but shall not run straight through the center.\n3Insulations and outer coverings that meet the requirements as flame retardant, limited smoke, and are so listed, shall be permitted to be marked for limited smoke after the Code type designation.\n4Elevator cables in sizes 20 AWG through 14 AWG are rated 300 volts, and sizes 10 AWG through 2 AWG are rated 600 volts. 12 AWG is rated 300 volts with a 0.76 mm (30 mil) insulation thickness and 600 volts with a 1.14 mm (45 mil) insulation thickness.\n5Conductor size for Types EV, EVJ, EVE, EVJE, EVT, and EVJT cables apply to non\u2014power-limited circuits only. Conductors of power-limited (data, signal, or communications) circuits may extend beyond the stated AWG size range. All conductors shall be insulated for the same cable voltage rating.\n6Insulation thickness for Types EV, EVJ, EVEJE, EVT, and EVJT cables of nylon construction is indicated in parentheses.\n7Types G, G-GC, S, SC, SCE, SCT, SE, SEO, SEOO, SEW, SEOW, SEOOW, SO, SOO, SOW, SOOW, ST, STO, STOO, STW, STOW, STOOW, PPE, and W shall be permitted for use on theater stages, in garages, and elsewhere where flexible cords are permitted by this Code.\n8The third conductor in Type HPN shall be used as an equipment grounding conductor only. The insulation of the equipment grounding conductor for Types SPE-1, SPE-2, SPE-3, SPT-1, SPT-2, SPT-3, NISPT-1, NISPT-2, NISPE-1, and NISPE-2 shall be permitted to be thermoset polymer.\n9Cords that comply with the requirements for outdoor cords and are so listed shall be permitted to be designated as weather and water resistant with the suffix \"W\" after the Code type designation. Cords with the \"W\" suffix are suitable for use in wet locations and are sunlight resistant.\n10The required outer covering on some single-conductor cables may be integral with the insulation.\n11Types TPT and TST shall be permitted in lengths not exceeding 2.5 m (8 ft) where attached directly, or by means of a special type of plug, to a portable appliance rated at 50 watts or less and of such nature that extreme flexibility of the cord is essential.\n  [400.4](https://2023.antflix.net#400.4)", + "displayTitle": "400.4 Types", + "children": [], + "url": "https://2023.antflix.net#400.4" + }, + { + "displayTitle": "400.5 Ampacities for Flexible Cords and Flexible Cables", + "children": [ + { + "body": "Table 400.5(A)(1) provides the ampacities for flexible cords and flexible cables, and Table 400.5(A)(2) provides the ampacities for flexible cords and flexible cables with not more than three current-carrying conductors. These tables shall be used in conjunction with applicable enduse product standards to ensure selection of the proper size and type. Where cords and cables are used in ambient temperatures other than 30\u00b0C (86\u00b0F), the temperature correction factors from Table 310.15(B)(1)(1) that correspond to the temperature rating of the cord or cable shall be applied to the ampacity in Table 400.5(A)(1) and Table 400.5(A)(2). Cords and cables rated 105\u00b0C shall use correction factors in the 90\u00b0C column of Table 310.15(B)(1)(1) for temperature correction. Where the number of current-carrying conductors exceeds three, the ampacity of each conductor shall be reduced from the three-conductor rating as shown in Table 400.5(A)(3).\nInformational Note: See Informative Annex B, Table B.2 (11), for adjustment factors for more than three current-carrying conductors in a raceway or cable with load diversity.\nA neutral conductor that carries only the unbalanced current from other conductors of the same circuit shall not be required to meet the requirements of a current-carrying conductor.\nIn a 3-wire circuit consisting of two phase conductors and the neutral conductor of a 4-wire, 3-phase, wye-connected system, a common conductor carries approximately the same current as the line-to-neutral currents of the other conductors and shall be considered to be a current-carrying conductor.\nOn a 4-wire, 3-phase, wye circuit where more than 50 percent of the load consists of nonlinear loads, there are harmonic currents present in the neutral conductor and the neutral conductor shall be considered to be a current-carrying conductor.\nAn equipment grounding conductor shall not be considered a current-carrying conductor.\nWhere a single conductor is used for both equipment grounding and to carry unbalanced current from other conductors, as provided for in 250.140 for electric ranges and electric clothes dryers, it shall not be considered as a current-carrying conductor.\nTable 400.5(A)(1) Ampacity for Flexible Cords and Flexible Cables [Based on Ambient Temperature of 30\u00b0C (86\u00b0F). See 400.13 and Table 400.4.]\n\n\n\nCopper Conductor Size (AWG)\nThermoplastic Types TPT, TST\nThermoset Types C, E, EO, PD, S, SJ, SJO, SJOW, SJOO, SJOOW, SO, SOW, SOO, SOOW, SP-1, SP-2, SP-3, SRD, SV, SVO, SVOO, NISP-1, NISP-2\nTypes HPD, HPN, HSJ, HSJO, HSJOW, HSJOO, HSJOOW\n\n\nThermoplastic Types ETP, ETT, NISPE-1, NISPE-2, NISPT-1, NISPT-2, SE, SEW, SEO, SEOO, SEOW, SEOOW, SJE, SJEW, SJEO, SJEOO, SJEOW, SJEOOW, SJT, SJTW, SJTO, SJTOW, SJTOO, SJTOOW, SPE-1, SPE-2, SPE-3, SPT-1, SPT-1W, SPT-2, SPT-2W, SPT-3, ST, STW, SRDE, SRDT, STO, STOW, STOO, STOOW, SVE, SVEO, SVEOO, SVT, SVTO, SVTOO\n\n\n\n\n \n \nColumn A1\nColumn B2\n \n\n\n273\n0.5\n-\n-\n-\n\n\n20\n-\n54\n5\n-\n\n\n18\n-\n7\n10\n10\n\n\n17\n-\n9\n12\n13\n\n\n16\n-\n10\n13\n15\n\n\n15\n-\n12\n16\n17\n\n\n14\n-\n15\n18\n20\n\n\n13\n-\n17\n21\n-\n\n\n12\n-\n20\n25\n30\n\n\n11\n-\n23\n27\n-\n\n\n10\n-\n25\n30\n35\n\n\n9\n-\n29\n34\n-\n\n\n8\n-\n35\n40\n-\n\n\n7\n-\n40\n47\n-\n\n\n6\n-\n45\n55\n-\n\n\n5\n-\n52\n62\n-\n\n\n4\n-\n60\n70\n-\n\n\n3\n-\n70\n82\n-\n\n\n2\n-\n80\n95\n-\n\n\n\n1The currents under Column A apply to three-conductor cords and other multiconductor cords connected to utilization equipment so that only three conductors are current-carrying.\n2The currents under Column B apply to two-conductor cords and other multiconductor cords connected to utilization equipment so that only two conductors are current-carrying.\n3Tinsel cord.\n4Elevator cables only.\n57 amperes for elevator cables only; 2 amperes for other types.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nTable 400.5(A)(2) Ampacity of Cable Types SC, SCE, SCT, PPE, G, G-GC, and W [Based on Ambient Temperature of 30\u00b0C (86\u00b0F). See Table 400.4.]\n\n\n\nCopper Conductor Size (AWG or kcmil)\nTemperature Rating of Cable\n\n\n60\u00b0C (140\u00b0F)\n75\u00b0C (167\u00b0F)\n90\u00b0C (194\u00b0F)\n\n\nD1\nE2\nF3\nD1\nE2\nF3\nD1\nE2\nF3\n\n\n\n\n12\n-\n31\n26\n-\n37\n31\n-\n42\n35\n\n\n10\n-\n44\n37\n-\n52\n43\n-\n59\n49\n\n\n8\n60\n55\n48\n70\n65\n57\n80\n74\n65\n\n\n6\n80\n72\n63\n95\n88\n77\n105\n99\n87\n\n\n4\n105\n96\n84\n125\n115\n101\n140\n130\n114\n\n\n3\n120\n113\n99\n145\n135\n118\n165\n152\n133\n\n\n2\n140\n128\n112\n170\n152\n133\n190\n174\n152\n\n\n1\n165\n150\n131\n195\n178\n156\n220\n202\n177\n\n\n1/0\n195\n173\n151\n230\n207\n181\n260\n234\n205\n\n\n2/0\n225\n199\n174\n265\n238\n208\n300\n271\n237\n\n\n3/0\n260\n230\n201\n310\n275\n241\n350\n313\n274\n\n\n4/0\n300\n265\n232\n360\n317\n277\n405\n361\n316\n\n\n250\n340\n296\n259\n405\n354\n310\n455\n402\n352\n\n\n300\n375\n330\n289\n445\n395\n346\n505\n449\n393\n\n\n350\n420\n363\n318\n505\n435\n381\n570\n495\n433\n\n\n400\n455\n392\n343\n545\n469\n410\n615\n535\n468\n\n\n500\n515\n448\n392\n620\n537\n470\n700\n613\n536\n\n\n600\n575\n-\n-\n690\n-\n-\n780\n-\n-\n\n\n700\n630\n-\n-\n755\n-\n-\n855\n-\n-\n\n\n750\n655\n-\n-\n785\n-\n-\n885\n-\n-\n\n\n800\n680\n-\n-\n815\n-\n-\n920\n-\n-\n\n\n900\n730\n-\n-\n870\n-\n-\n985\n-\n-\n\n\n1000\n780\n-\n-\n935\n-\n-\n1055\n-\n-\n\n\n\n1The ampacities under subheading D shall be permitted for single-conductor Types SC, SCE, SCT, PPE, and W cable only where the individual conductors are not installed in raceways and are not in physical contact with each other except in lengths not to exceed 600 mm (24 in.) where passing through the wall of an enclosure.\n2The ampacities under subheading E apply to two-conductor cables and other multiconductor cables connected to utilization equipment so that only two conductors are current-carrying.\n3The ampacities under subheading F apply to three-conductor cables and other multiconductor cables connected to utilization equipment so that only three conductors are current-carrying.\nTable 400.5(A)(3) Adjustment Factors for More Than Three Current-Carrying Conductors in a Flexible Cord or Flexible Cable\n\n\n\nNumber of Conductors\nPercent of Value in Table 400.5(A)(1) and Table 400.5(A)(2)\n\n\n\n\n4\u20146\n80\n\n\n7\u20149\n70\n\n\n10\u201420\n50\n\n\n21\u201430\n45\n\n\n31\u201440\n40\n\n\n41 and above\n35\n\n\n [400.5_(A)](https://2023.antflix.net#400.5_(A))", + "displayTitle": "(A) Ampacity Tables", + "children": [], + "url": "https://2023.antflix.net#400.5_(A)" + }, + { + "body": "In no case shall conductors be associated together in such a way with respect to the kind of circuit, the wiring method used, or the number of conductors such that the limiting temperature of the conductors is exceeded. [400.5_(B)](https://2023.antflix.net#400.5_(B))", + "displayTitle": "(B) Ultimate Insulation Temperature", + "children": [], + "url": "https://2023.antflix.net#400.5_(B)" + }, + { + "body": "Under engineering supervision, conductor ampacities shall be permitted to be calculated in accordance with 310.14(B). [400.5_(C)](https://2023.antflix.net#400.5_(C))", + "displayTitle": "(C) Engineering Supervision", + "children": [], + "url": "https://2023.antflix.net#400.5_(C)" + } + ], + "url": "https://2023.antflix.net#400.5" + }, + { + "displayTitle": "400.6 Markings", + "children": [ + { + "body": "Flexible cords and flexible cables shall be marked by means of a printed tag attached to the coil reel or carton. The tag shall contain the information required in 310.8(A). Types S, SC, SCE, SCT, SE, SEO, SEOO, SJ, SJE, SJEO, SJEOO, SJO, SJT, SJTO, SJTOO, SO, SOO, ST, STO, STOO, SEW, SEOW, SEOOW, SJEW, SJEOW, SJEOOW, SJOW, SJTW, SJTOW, SJTOOW, SOW, SOOW, STW, STOW, and STOOW flexible cords and G, G-GC, PPE, and W flexible cables shall be durably marked on the surface at intervals not exceeding 610 mm (24 in.) with the type designation, size, and number of conductors. Required markings on tags, cords, and cables shall also include the maximum operating temperature of the flexible cord or flexible cable. [400.6_(A)](https://2023.antflix.net#400.6_(A))", + "displayTitle": "(A) Standard Markings", + "children": [], + "url": "https://2023.antflix.net#400.6_(A)" + }, + { + "body": "Flexible cords and cable types listed in Table 400.4 shall be permitted to be surface marked to indicate special characteristics of the cable materials. These markings include, but are not limited to, markings for limited smoke, sunlight resistance, and so forth. [400.6_(B)](https://2023.antflix.net#400.6_(B))", + "displayTitle": "(B) Optional Markings", + "children": [], + "url": "https://2023.antflix.net#400.6_(B)" + } + ], + "url": "https://2023.antflix.net#400.6" + }, + { + "displayTitle": "400.10 Uses Permitted", + "children": [ + { + "body": "Flexible cords and flexible cables shall be used only for the following: Pendants.Wiring of luminaires.Connection of portable luminaires, portable and mobile signs, or appliances.Elevator cables.Wiring of cranes and hoists.Connection of utilization equipment to facilitate frequent interchange.Prevention of the transmission of noise or vibration.Appliances where the fastening means and mechanical connections are specifically designed to permit ready removal for maintenance and repair, and the appliance is intended or identified for flexible cord connection.Connection of moving parts.Where specifically permitted elsewhere in this Code.Between an existing receptacle outlet and an inlet, where the inlet provides power to an additional single receptacle outlet. The wiring interconnecting the inlet to the single receptacle outlet shall be a Chapter 3 wiring method. The inlet, receptacle outlet, and Chapter 3 wiring method, including the flexible cord and fittings, shall be a listed assembly specific for this application. [400.10_(A)](https://2023.antflix.net#400.10_(A))", + "displayTitle": "(A) Uses", + "children": [], + "url": "https://2023.antflix.net#400.10_(A)" + }, + { + "body": "Where used as permitted in 400.10(A)(3), (A)(6), and (A)(8), each flexible cord shall be equipped with an attachment plug and shall be energized from a receptacle outlet or cord connector body.\nException: As permitted in 368.56. [400.10_(B)](https://2023.antflix.net#400.10_(B))", + "displayTitle": "(B) Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#400.10_(B)" + } + ], + "url": "https://2023.antflix.net#400.10" + }, + { + "body": "Unless specifically permitted in 400.10, flexible cords, flexible cables, cord sets, and power supply cords shall not be used for the following: As a substitute for the fixed wiring of a structureWhere run through holes in walls, structural ceilings, suspended ceilings, dropped ceilings, or floorsWhere run through doorways, windows, or similar openingsWhere attached to building surfacesException to (4): Flexible cord and flexible cable shall be permitted to be attached to building surfaces in accordance with 368.56(B) and 590.4.Where concealed by walls, floors, or ceilings or located above suspended or dropped ceilingsException to (5): Flexible cords, flexible cables, and power supply cords shall be permitted if contained within an enclosure, for use in other spaces used for environmental air as permitted by 300.22(C)(3).Where installed in raceways, except as otherwise permitted in this CodeWhere subject to physical damageInformational Note: See UL 817, Cord Sets and Power-Supply Cords, and UL 62, Flexible Cords and Cables, for proper application. [400.12](https://2023.antflix.net#400.12)", + "displayTitle": "400.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#400.12" + }, + { + "body": "Flexible cord shall be used only in continuous lengths without splice or tap where initially installed in applications permitted by 400.10(A). The repair of hard-service cord and junior hard-service cord (see Trade Name column in Table 400.4) 14 AWG and larger shall be permitted if conductors are spliced in accordance with 110.14(B) and the completed splice retains the insulation, outer sheath properties, and usage characteristics of the cord being spliced. [400.13](https://2023.antflix.net#400.13)", + "displayTitle": "400.13 Splices", + "children": [], + "url": "https://2023.antflix.net#400.13" + }, + { + "body": "Flexible cords and flexible cables shall be connected to devices and to fittings so that tension is not transmitted to joints or terminals. Exception: Listed portable single-pole devices that are intended to accommodate such tension at their terminals shall be permitted to be used with single-conductor flexible cable. Informational Note: Some methods of preventing pull on a cord from being transmitted to joints or terminals include knotting the cord, winding with tape, and using support or strain-relief fittings. [400.14](https://2023.antflix.net#400.14)", + "displayTitle": "400.14 Pull at Joints and Terminals", + "children": [], + "url": "https://2023.antflix.net#400.14" + }, + { + "body": "Flexible cords used in show windows and showcases shall be Types S, SE, SEO, SEOO, SJ, SJE, SJEO, SJEOO, SJO, SJOO, SJT, SJTO, SJTOO, SO, SOO, ST, STO, STOO, SEW, SEOW, SEOOW, SJEW, SJEOW, SJEOOW, SJOW, SJOOW, SJTW, SJTOW, SJTOOW, SOW, SOOW, STW, STOW, or STOOW. Exception No. 1 : For the wiring of chain-supported luminaires. Exception No. 2: As supply cords for portable luminaires and other merchandise being displayed or exhibited. [400.15](https://2023.antflix.net#400.15)", + "displayTitle": "400.15 In Show Windows and Showcases", + "children": [], + "url": "https://2023.antflix.net#400.15" + }, + { + "body": "Flexible cords not smaller than 18 AWG, and tinsel cords or cords having equivalent characteristics of smaller size approved for use with specific appliances, shall be considered as protected against overcurrent in accordance with 240.5. [400.16](https://2023.antflix.net#400.16)", + "displayTitle": "400.16 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#400.16" + }, + { + "body": "Flexible cords and flexible cables shall be protected by bushings or fittings where passing through holes in covers, outlet boxes, or similar enclosures. In industrial establishments where the conditions of maintenance and supervision ensure that only qualified persons service the installation, flexible cords and flexible cables shall be permitted to be installed in aboveground raceways that are no longer than 15 m (50 ft) to protect the flexible cord or flexible cable from physical damage. Where more than three current-carrying conductors are installed within the raceway, the ampacity shall be adjusted in accordance with Table 400.5(A)(3). [400.17](https://2023.antflix.net#400.17)", + "displayTitle": "400.17 Protection From Damage", + "children": [], + "url": "https://2023.antflix.net#400.17" + }, + { + "displayTitle": "Part II Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_56_II" + }, + { + "body": "Flexible cords shall be examined and tested at the factory and labeled before shipment. [400.20](https://2023.antflix.net#400.20)", + "displayTitle": "400.20 Labels", + "children": [], + "url": "https://2023.antflix.net#400.20" + }, + { + "displayTitle": "400.21 Construction", + "children": [ + { + "body": "The individual conductors of a flexible cord or flexible cable shall have copper flexible stranding and shall not be smaller than the sizes specified in Table 400.4. [400.21_(A)](https://2023.antflix.net#400.21_(A))", + "displayTitle": "(A) Conductors", + "children": [], + "url": "https://2023.antflix.net#400.21_(A)" + }, + { + "body": "The nominal thickness of insulation for conductors of flexible cords and flexible cables shall not be less than specified in Table 400.4. [400.21_(B)](https://2023.antflix.net#400.21_(B))", + "displayTitle": "(B) Nominal Insulation Thickness", + "children": [], + "url": "https://2023.antflix.net#400.21_(B)" + } + ], + "url": "https://2023.antflix.net#400.21" + }, + { + "body": "One conductor of flexible cords that is intended to be used as a grounded circuit conductor shall have a continuous marker that readily distinguishes it from the other conductor or conductors. The identification shall consist of one of the methods indicated in 400.22(A) through (F). [400.22](https://2023.antflix.net#400.22)", + "displayTitle": "400.22 Grounded-Conductor Identification", + "children": [ + { + "body": "A braid finished to show a white or gray color and the braid on the other conductor or conductors finished to show a readily distinguishable solid color or colors. [400.22_(A)](https://2023.antflix.net#400.22_(A))", + "displayTitle": "(A) Colored Braid", + "children": [], + "url": "https://2023.antflix.net#400.22_(A)" + }, + { + "body": "A tracer in a braid of any color contrasting with that of the braid and no tracer in the braid of the other conductor or conductors. No tracer shall be used in the braid of any conductor of a flexible cord that contains a conductor having a braid finished to show white or gray. Exception: In the case of Types C and PD and cords having the braids on the individual conductors finished to show white or gray. In such cords, the identifying marker shall be permitted to consist of the solid white or gray finish on one conductor, provided there is a colored tracer in the braid of each other conductor. [400.22_(B)](https://2023.antflix.net#400.22_(B))", + "displayTitle": "(B) Tracer in Braid", + "children": [], + "url": "https://2023.antflix.net#400.22_(B)" + }, + { + "body": "A white or gray insulation on one conductor and insulation of a readily distinguishable color or colors on the other conductor or conductors for cords having no braids on the individual conductors. For jacketed cords furnished with appliances, one conductor having its insulation colored light blue, with the other conductors having their insulation of a readily distinguishable color other than white or gray. Exception: Cords that have insulation on the individual conductors integral with the jacket. The insulation shall be permitted to be covered with an outer finish to provide the desired color. [400.22_(C)](https://2023.antflix.net#400.22_(C))", + "displayTitle": "(C) Colored Insulation", + "children": [], + "url": "https://2023.antflix.net#400.22_(C)" + }, + { + "body": "A white or gray separator on one conductor and a separator of a readily distinguishable solid color on the other conductor or conductors of cords having insulation on the individual conductors integral with the jacket. [400.22_(D)](https://2023.antflix.net#400.22_(D))", + "displayTitle": "(D) Colored Separator", + "children": [], + "url": "https://2023.antflix.net#400.22_(D)" + }, + { + "body": "One conductor having the individual strands tinned and the other conductor or conductors having the individual strands untinned for cords having insulation on the individual conductors integral with the jacket. [400.22_(E)](https://2023.antflix.net#400.22_(E))", + "displayTitle": "(E) Tinned Conductors", + "children": [], + "url": "https://2023.antflix.net#400.22_(E)" + }, + { + "body": "One or more ridges, grooves, or white stripes located on the exterior of the cord so as to identify one conductor for cords having insulation on the individual conductors integral with the jacket. [400.22_(F)](https://2023.antflix.net#400.22_(F))", + "displayTitle": "(F) Surface Marking", + "children": [], + "url": "https://2023.antflix.net#400.22_(F)" + } + ], + "url": "https://2023.antflix.net#400.22" + }, + { + "body": "A conductor intended to be used as an equipment grounding conductor shall have a continuous identifying marker readily distinguishing it from the other conductor or conductors. Conductors having a continuous green color or a continuous green color with one or more yellow stripes shall not be used for other than equipment grounding conductors. Cords or cables consisting of integral insulation and a jacket without a nonintegral equipment grounding conductor shall be permitted to be green. The identifying marker shall consist of one of the methods in 400.23(A) or (B). [400.23](https://2023.antflix.net#400.23)", + "displayTitle": "400.23 Equipment Grounding Conductor Identification", + "children": [ + { + "body": "A braid finished to show a continuous green color or a continuous green color with one or more yellow stripes. [400.23_(A)](https://2023.antflix.net#400.23_(A))", + "displayTitle": "(A) Colored Braid", + "children": [], + "url": "https://2023.antflix.net#400.23_(A)" + }, + { + "body": "For cords having no braids on the individual conductors, an insulation of a continuous green color or a continuous green color with one or more yellow stripes. [400.23_(B)](https://2023.antflix.net#400.23_(B))", + "displayTitle": "(B) Colored Insulation or Covering", + "children": [], + "url": "https://2023.antflix.net#400.23_(B)" + } + ], + "url": "https://2023.antflix.net#400.23" + }, + { + "body": "Where a flexible cord is provided with an equipment grounding conductor and equipped with an attachment plug, the attachment plug shall comply with 250.138(A) and (B). [400.24](https://2023.antflix.net#400.24)", + "displayTitle": "400.24 Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#400.24" + }, + { + "displayTitle": "Part III Portable Cables Over 600 Volts, Up to 2000 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#divider_49_III" + }, + { + "body": "Part III applies to single and multiconductor portable cables used to connect mobile equipment and machinery. [400.30](https://2023.antflix.net#400.30)", + "displayTitle": "400.30 General", + "children": [], + "url": "https://2023.antflix.net#400.30" + }, + { + "displayTitle": "400.31 Construction", + "children": [ + { + "body": "The conductors shall be 12 AWG copper or larger and shall employ flexible stranding. [400.31_(A)](https://2023.antflix.net#400.31_(A))", + "displayTitle": "(A) Conductors", + "children": [], + "url": "https://2023.antflix.net#400.31_(A)" + }, + { + "body": "An equipment grounding conductor(s) shall be provided in cables with three or more conductors. The total area shall not be less than that of the size of the equipment grounding conductor required in 250.122. [400.31_(B)](https://2023.antflix.net#400.31_(B))", + "displayTitle": "(B) Equipment Grounding Conductor(s)", + "children": [], + "url": "https://2023.antflix.net#400.31_(B)" + } + ], + "url": "https://2023.antflix.net#400.31" + }, + { + "body": "All shields shall be connected to an equipment grounding conductor. [400.32](https://2023.antflix.net#400.32)", + "displayTitle": "400.32 Shielding", + "children": [], + "url": "https://2023.antflix.net#400.32" + }, + { + "body": "Equipment grounding conductors shall be connected in accordance with Parts VI and VII of Article 250. [400.33](https://2023.antflix.net#400.33)", + "displayTitle": "400.33 Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#400.33" + }, + { + "body": "The minimum bending radii for portable cables during installation and handling in service shall be adequate to prevent damage to the cable. [400.34](https://2023.antflix.net#400.34)", + "displayTitle": "400.34 Minimum Bending Radii", + "children": [], + "url": "https://2023.antflix.net#400.34" + }, + { + "body": "Connectors used to connect lengths of cable in a run shall be of a type that locks or latches firmly together. Provisions shall be made to prevent opening or closing these connectors while energized. Suitable means shall be used to eliminate tension at connectors and terminations. [400.35](https://2023.antflix.net#400.35)", + "displayTitle": "400.35 Fittings", + "children": [], + "url": "https://2023.antflix.net#400.35" + }, + { + "body": "Portable cables shall not contain splices unless the splices are of the permanent molded, vulcanized types in accordance with 110.14(B). Terminations on portable cables rated over 600 volts, nominal, shall be accessible only to authorized and qualified personnel. [400.36](https://2023.antflix.net#400.36)", + "displayTitle": "400.36 Splices and Terminations", + "children": [], + "url": "https://2023.antflix.net#400.36" + }, + { + "displayTitle": "Part IV Portable Power Feeder Cables Over 2000 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#divider_9_IV" + }, + { + "body": "Part IV applies to single and multiconductor portable power feeder cables over 2000 volts nominal used to connect portable equipment and machinery. [400.40](https://2023.antflix.net#400.40)", + "displayTitle": "400.40 General", + "children": [], + "url": "https://2023.antflix.net#400.40" + }, + { + "body": "Portable power feeder cables rated greater than 2000 volts shall comply with 400.14, 400.17, and 400.23 and with the following sections. Informational Note: See ANSI/NEMA WC 58/ ICEA S-75-381, Portable and Power Feeder Cables for Use in Mines and Similar Applications, for information on construction, testing, and marking of portable power feeder cables. [400.41](https://2023.antflix.net#400.41)", + "displayTitle": "400.41 Portable Power Feeder Cables", + "children": [], + "url": "https://2023.antflix.net#400.41" + }, + { + "body": "Portable power feeder cables over 2000 volts shall be used for the following: Connection of portable equipment and machinery or for wiring of cranes and hoistsTemporary services and installations [400.42](https://2023.antflix.net#400.42)", + "displayTitle": "400.42 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#400.42" + }, + { + "body": "Portable power feeder cables over 2000 volts shall not be used for the following: As a substitute for the fixed wiring of a structureWhere run through holes in walls, ceilings, or floorsWhere run through doorways, windows, or similar openingsWhere attached to building surfacesWhere concealed by walls, floors, or ceilingsWhere installed in raceways, except as otherwise permitted in this CodeWhere subject to physical damage [400.43](https://2023.antflix.net#400.43)", + "displayTitle": "400.43 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#400.43" + }, + { + "displayTitle": "400.44 Construction", + "children": [ + { + "body": "The conductors shall be 6 AWG copper or larger and shall employ flexible stranding. [400.44_(A)](https://2023.antflix.net#400.44_(A))", + "displayTitle": "(A) Conductors", + "children": [], + "url": "https://2023.antflix.net#400.44_(A)" + }, + { + "body": "The nominal thickness of insulation for portable power feeder cables shall not be less than specified in Table 400.44(B)(1) through Table 400.44(B)(4).Table 400.44(B)(1) Thickness of Insulation for Three-Conductor Type G Portable Power Feeder Cables Rated 2000 Volts to 5000 Volts and Equipment Grounding Conductor Size Copper Conductor Size (AWG) or kcmil Nominal Insulation Thickness of Power Conductors Equipment Grounding Conductor mils mm Size AWG 6 110 2.79 10 4\u20142 110 2.79 8 1 110 2.79 7 1/0 110 2.79 6 2/0 110 2.79 5 3/0 110 2.79 4 4/0 110 2.79 3 Table 400.44(B)(2) Thickness of Insulation for Single Conductor Type SH Portable Power Feeder Cables Rated 2000 Volts to 25,000 Volts for 100 Percent Insulation Level Copper Conductor Size (AWG) or kcmil Nominal Insulation Thickness of Power Conductors mils mm 2001 to 5000 volts 6\u20144/0 110 2.79 250\u2014500 120 3.05 5001 to 8000 volts 4\u2014500 150 3.81 8001 to 15,000 volts 2\u2014500 210 5.33 15,001 to 25,000 volts 1\u2014500 295 7.49 Table 400.44(B)(3) Thickness of Insulation for Three-Conductor Type SHD and SHD-GC Portable Power Feeder Cables Rated 2000 Volts to 25,000 Volts for 100 Percent Insulation Level and Grounding Conductor Size Copper Conductor Size (AWG) or kcmil Nominal Insulation Thickness of Power Conductors Grounding Conductor mils mm Size AWG 2000 to 5000 volts 6\u20144/0 110 2.79 8 250\u2014500 120 3.05 8 5001 to 8000 volts 4\u2014500 150 3.81 8 8001 to 15,000 volts 2\u20144/0 210 5.33 8 15.001 to 25,000 volts 1\u20144/0 295 7.49 8 Table 400.44(B)(4) Thickness of Insulation for Three-Conductor Type SHD-CGC Portable Power Feeder Cables Rated 2000 Volts to 5000 Volts for 100 Percent Insulation Level and Grounding Conductor Size Copper Conductor Size (AWG) or kcmil Nominal Insulation Thickness of Power Conductors Equipment Grounding Conductor mils mm Size AWG 6 110 2.79 10 4\u20142 110 2.79 8 1 110 2.79 7 1/0 110 2.79 6 2/0 110 2.79 5 3/0 110 2.79 4 4/0 110 2.79 3 250 120 3.05 2 300\u2014350 120 3.05 1 500 120 3.05 2/0 [400.44_(B)](https://2023.antflix.net#400.44_(B))", + "displayTitle": "(B) Nominal Insulation Thickness", + "children": [], + "url": "https://2023.antflix.net#400.44_(B)" + }, + { + "body": "An equipment grounding conductor(s) shall be provided in cables with three or more conductors. The total area shall not be less than that of the size of the equipment grounding conductor required in 250.122. [400.44_(C)](https://2023.antflix.net#400.44_(C))", + "displayTitle": "(C) Equipment Grounding Conductor(s)", + "children": [], + "url": "https://2023.antflix.net#400.44_(C)" + } + ], + "url": "https://2023.antflix.net#400.44" + }, + { + "body": "All shields shall be grounded at least at one end. [400.45](https://2023.antflix.net#400.45)", + "displayTitle": "400.45 Shielding", + "children": [], + "url": "https://2023.antflix.net#400.45" + }, + { + "body": "Equipment grounding conductors shall be connected in accordance with Parts VI and VII of Article 250. [400.46](https://2023.antflix.net#400.46)", + "displayTitle": "400.46 Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#400.46" + }, + { + "body": "The minimum bending radii for portable power feeder cables from 2000 volts to 5000 volts shall not exceed six times the overall cable outer diameter. The minimum bending radii for portable cables from 5001 volts to 25,000 volts shall not exceed eight times the overall cable outer diameter. [400.47](https://2023.antflix.net#400.47)", + "displayTitle": "400.47 Minimum Bending Radii", + "children": [], + "url": "https://2023.antflix.net#400.47" + }, + { + "body": "The use of connectors and couplers to connect lengths of cable together in a run shall not be permitted. [400.48](https://2023.antflix.net#400.48)", + "displayTitle": "400.48 Fittings", + "children": [], + "url": "https://2023.antflix.net#400.48" + }, + { + "body": "Portable power feeder cables shall not contain splices. Connectors, couplers, lugs, elbows, and terminations for portable power feeder cables rated over 2000 volts, nominal, shall be accessible only to authorized and qualified personnel. Suitable means shall be used to eliminate tension at connectors, couplers, lugs, elbows, and terminations. [400.49](https://2023.antflix.net#400.49)", + "displayTitle": "400.49 Splices and Terminations", + "children": [], + "url": "https://2023.antflix.net#400.49" + }, + { + "body": "Portable power feeder cables rated greater than 2000 volts shall conform to the description in Table 400.50. Types G, SHD-PCG, and SHD-CGC shall be used only from 2000 volts to 5000 volts. Types SH, SHD, and SHD-GC shall be used from 2000 volts to 25,000 volts. Where a Type designation for portable power feeder cables over 2000 volts conflicts with a designation description in Table 400.4, the description in Table 400.50 shall apply. The use of portable power feeder cables other than those in Table 400.50 shall require permission by the authority having jurisdiction.Table 400.50 Portable Power Feeder Cables\n\n\n\nTrade Name\nType Letter\nVoltage\nAWG or kcmil\nInsulation\nOuter Covering\nGround Check Conductor\nGrounding Conductor\nShielded\nMulticonductor Configuration\n\n\n\n\nPortable Power Feeder Cables\nG\n2001\u20145000\n8\u20144/0\nThermoset\nHeavy duty or extra heavy duty Thermoset\nNo\nYes\nYes\nTwo parallel power conductors with a single grounding conductor\n\n\nSHD-PCG\n2001\u20145000\n3\u20144/0\nThermoset\nHeavy duty or extra heavy duty Thermoset\nNo\nYes\nIndividually shielded power conductors\nRound three power conductors that are separately covered with insulation, a tape, and a metallic shield, grounding conductor, and one or more control conductors under a unit jacket.\n\n\n \nSH\n2001\u201425,000\n6\u2014500\nThermoset\nHeavy duty or extra heavy duty Thermoset\nNo\nNo\nYes\nN/A\n\n\n \nSHD\n2001\u201425,000\n6\u2014500\nThermoset\nHeavy duty or extra heavy duty Thermoset\nNo\nYes\nIndividually shielded power conductors and grounding conductors\nRound three power conductors that are separately covered with insulation, a tape, and a shield, and three grounding conductors, one in each interstice.\n\n\n \nSHD-GC\n2001\u201425,000\n6\u2014500\nThermoset\nHeavy duty or extra heavy duty Thermoset\nYes\nYes\nIndividually shielded power and grounding conductors\nRound three power conductors that are separately covered with insulation, a tape, and a shield, and two grounding conductors and one ground-check conductor\n\n\n \nSHD-CGC\n2001\u20145000\n8\u2014500\nThermoset\nHeavy duty or extra heavy duty Thermoset\nYes\nYes\nIndividually shielded power conductors, grounding conductors, and one ground-check conductor in center\nRound three power conductors that are separately covered with insulation, a tape, and metal shield, three grounding conductors, and one center ground-check conductor.\n\n\n\nTable 400.51(A)(1) Ampacity for Portable Power Feeder Cables Over 2000 Volts [Based on Ambient Temperature of 30\u00b0C (86\u00b0F)]\n\n\n\nCopper Conductor Size (AWG) or kcmil\nSingle Conductor*\nThree Conductor\nCopper Conductor Size (AWG) or kcmil\n\n\n2001\u20148000 Volts Shielded\n8001\u201415,000 Volts Shielded\n15,001\u201425,000 Volts Shielded\n2001\u20148000 Volts Shielded\n8001\u201415,000 Volts Shielded\n8001\u201415,000 Volts Shielded\n\n\n\n\n6\n123\n-\n-\n102\n-\n-\n6\n\n\n4\n163\n-\n-\n134\n-\n-\n4\n\n\n3\n188\n-\n-\n154\n-\n-\n3\n\n\n2\n214\n214\n-\n175\n180\n196\n2\n\n\n1\n247\n247\n244\n202\n205\n210\n1\n\n\n1/0\n286\n285\n280\n232\n236\n240\n1/0\n\n\n2/0\n329\n328\n322\n267\n270\n274\n2/0\n\n\n3/0\n379\n377\n371\n307\n311\n315\n3/0\n\n\n4/0\n440\n437\n428\n353\n357\n360\n4/0\n\n\n250\n488\n484\n473\n390\n395\n396\n250\n\n\n300\n545\n540\n528\n438\n-\n-\n300\n\n\n350\n604\n597\n582\n478\n-\n-\n350\n\n\n400\n656\n649\n629\n470\n-\n-\n400\n\n\n450\n704\n696\n676\n503\n-\n-\n450\n\n\n500\n757\n746\n725\n536\n-\n-\n500\n\n\n\nNote: Ampacities are based on a conductor temperature of 90\u00b0C (194\u00b0F) and an ambient air temperature of 30\u00b0C (86\u00b0F).\n*Ampacities are based on single isolated cable in air operated with open-circuited shield.\nTable 400.51(A)(2) Adjustment Factors for Different Ambient Temperatures\n\n\n\nAmbient Temperature, Degrees\nMultiplying Correction Factor\n\n\n\u00b0C\n\u00b0F\n\n\n\n\n10\n50\n1.26\n\n\n20\n68\n1.18\n\n\n30\n86\n1.10\n\n\n40\n104\n1.00\n\n\n50\n122\n0.90\n\n\n\nTable 400.51(A)(3) Adjustment Factors for Number of Layers of Cable Wound on a Reel\n\n\n\nNumber of Layers\nMultiplying Correction Factor\n\n\n\n\n1\n0.85\n\n\n2\n0.65\n\n\n3\n0.45\n\n\n4*\n0.35\n\n\n\n*If more than four layers of cable are wound on the reel, ampacity derating should be calculated using engineering supervision. [400.50](https://2023.antflix.net#400.50)", + "displayTitle": "400.50 Types", + "children": [], + "url": "https://2023.antflix.net#400.50" + }, + { + "displayTitle": "400.51 Ampacities for Portable Power Feeder Cables Rated Greater Than 2000 Volts", + "children": [ + { + "body": "Table 400.51(A)(1) provides the ampacities for single and three-conductor portable power feeder cables rated greater than 2000 volts. Where portable power feeder cables are used in ambient temperatures other than 30\u00b0C (86\u00b0F), the temperature correction factors from Table 400.51(A)(2) that correspond to the differing ambient temperature shall be applied to the ampacity in Table 400.51(A)(1). Where the cable will not be completely unwound from the cord reel, the ampacity correction factor based on the number of layers remaining wound on a reel shall be applied as shown in Table 400.51(A)(3). [400.51_(A)](https://2023.antflix.net#400.51_(A))", + "displayTitle": "(A) Ampacity Tables", + "children": [], + "url": "https://2023.antflix.net#400.51_(A)" + }, + { + "body": "Under engineering supervision, conductor ampacities shall be permitted to be calculated in accordance with 310.14(B). [400.51_(B)](https://2023.antflix.net#400.51_(B))", + "displayTitle": "(B) Engineering Supervision", + "children": [], + "url": "https://2023.antflix.net#400.51_(B)" + } + ], + "url": "https://2023.antflix.net#400.51" + }, + { + "displayTitle": "400.52 Markings", + "children": [ + { + "body": "Portable power feeder cables shall be marked by means of a printed tag attached to the coil reel or carton. The tag shall contain the information required in 310.8(A). Types G, SHD-PCG, SH, SHD, SHD-GC, and SHD-CGC portable power feeder cables shall be durably marked on the surface at intervals not exceeding 610 mm (24 in.) with the following: The maximum rated voltageThe proper type letter or letters for the type of portable power feeder cable as specified elsewhere in this CodeThe manufacturer's name, trademark, or other distinctive marking by which the organization responsible for the product can be readily identifiedThe AWG size or circular mil areaMaximum operating temperature [400.52_(A)](https://2023.antflix.net#400.52_(A))", + "displayTitle": "(A) Required Markings", + "children": [], + "url": "https://2023.antflix.net#400.52_(A)" + }, + { + "body": "Portable power feeder cables listed in Table 400.50 shall be permitted to be surface marked to indicate special characteristics of the cable materials. These markings shall be permitted to include, but are not limited to, markings for limited smoke, sunlight resistance, and so forth. [400.52_(B)](https://2023.antflix.net#400.52_(B))", + "displayTitle": "(B) Optional Markings", + "children": [], + "url": "https://2023.antflix.net#400.52_(B)" + } + ], + "url": "https://2023.antflix.net#400.52" + } + ], + "url": "https://2023.antflix.net#400" + }, + { + "displayTitle": "Article 402 Fixture Wires", + "children": [ + { + "body": "This article covers general requirements and construction specifications for fixture wires. [402.1](https://2023.antflix.net#402.1)", + "displayTitle": "402.1 Scope", + "children": [], + "url": "https://2023.antflix.net#402.1" + }, + { + "body": "Fixture wires shall comply with this article and also with the applicable provisions of other articles of this Code. Informational Note: See Part VI of Article 410 for application in luminaires. [402.2](https://2023.antflix.net#402.2)", + "displayTitle": "402.2 Other Articles", + "children": [], + "url": "https://2023.antflix.net#402.2" + }, + { + "body": "Fixture wires shall be of a type listed in Table 402.3, and they shall comply with all requirements of that table. The fixture wires listed in Table 402.3 are all suitable for service at 600 volts, nominal, unless otherwise specified. Informational Note: Thermoplastic insulation may stiffen at temperatures lower than -10\u00b0C (+14\u00b0F). Thermoplastic insulation may also be deformed at normal temperatures where subjected to pressure, such as at points of support.Table 402.3 Fixture Wires\n\n\n\nName\nType Letter\nInsulation\nAWG\nThickness of Insulation\nOuter Covering\nMaximum Operating Temperature\nApplication Provisions\n\n\nmm\nmils\n\n\n\n\nHeat-resistant rubber-covered fixture wire - flexible stranding\nFFH-2\nHeat-resistant rubber or cross-linked synthetic polymer\n18\u201416\n0.76\n30\nNonmetallic covering\n75\u00b0C(167\u00b0F)\nFixture wiring\n\n\nFFHH-2\n90\u00b0C(194\u00b0F)\n\n\nECTFE - solid or 7-strand\nHF\nEthylene chlorotrifluoroethylene\n18\u201414\n0.38\n15\nNone\n150\u00b0C(302\u00b0F)\nFixture wiring\n\n\nECTFE - flexible stranding\nHFF\nEthylene chlorotrifluoroethylene\n18\u201414\n0.38\n15\nNone\n150\u00b0C(302\u00b0F)\nFixture wiring\n\n\nTape insulated fixture wire - solid or 7-strand\nKF-1\nAromatic polyimide tape\n18\u201410\n0.14\n5.5\nNone\n200\u00b0C(392\u00b0F)\nFixture wiring - limited to 300 volts\n\n\nKF-2\nAromatic polyimide tape\n18\u201410\n0.21\n8.4\nNone\n200\u00b0C(392\u00b0F)\nFixture wiring\n\n\nTape insulated fixture wire - flexible stranding\nKFF-1\nAromatic polyimide tape\n18\u201410\n0.14\n5.5\nNone\n200\u00b0C(392\u00b0F)\nFixture wiring - limited to 300 volts\n\n\nKFF-2\nAromatic polyimide tape\n18\u201410\n0.21\n8.4\nNone\n200\u00b0C(392\u00b0F)\nFixture wiring\n\n\nPerfluoro-alkoxy - solid or 7-strand (nickel or nickel-coated copper)\nPAF\nPerfluoro-alkoxy\n18\u201414\n0.51\n20\nNone\n250\u00b0C(482\u00b0F)\nFixture wiring (nickel or nickel-coated copper)\n\n\nPerfluoro-alkoxy - flexible stranding\nPAFF\nPerfluoro-alkoxy\n18\u201414\n0.51\n20\nNone\n150\u00b0C(302\u00b0F)\nFixture wiring\n\n\nFluorinated ethylene propylene fixture wire - solid or 7-strand\nPF\nFluorinated ethylene propylene\n18\u201414\n0.51\n20\nNone\n200\u00b0C(392\u00b0F)\nFixture wiring\n\n\nFluorinated ethylene propylene fixture wire - flexible stranding\nPFF\nFluorinated ethylene propylene\n18\u201414\n0.51\n20\nNone\n150\u00b0C(302\u00b0F)\nFixture wiring\n\n\nFluorinated ethylene propylene fixture wire - solid or 7-strand\nPGF\nFluorinated ethylene propylene\n18\u201414\n0.36\n14\nGlass braid\n200\u00b0C(392\u00b0F)\nFixture wiring\n\n\nFluorinated ethylene propylene fixture wire - flexible stranding\nPGFF\nFluorinated ethylene propylene\n18\u201414\n0.36\n14\nGlass braid\n150\u00b0C(302\u00b0F)\nFixture wiring\n\n\nExtruded polytetrafluoroethylene - solid or 7-strand (nickel or nickel-coated copper)\nPTF\nExtruded polytetrafluoroethylene\n18\u201414\n0.51\n20\nNone\n250\u00b0C(482\u00b0F)\nFixture wiring (nickel or nickel-coated copper)\n\n\nExtruded polytetrafluoroethylene - flexible stranding 26-36 (AWG silver or nickel-coated copper)\nPTFF\nExtruded polytetrafluoroethylene\n18\u201414\n0.51\n20\nNone\n150\u00b0C(302\u00b0F)\nFixture wiring (silver or nickel-coated copper)\n\n\nHeat-resistant rubber-covered fixture wire - solid or 7-strand\nRFH-1\nHeat-resistant rubber\n18\n0.38\n15\nNonmetallic covering\n75\u00b0C(167\u00b0F)\nFixture wiring - limited to 300 volts\n\n\nRFH-2\nHeat-resistant rubber Cross-linked synthetic polymer\n18\u201416\n0.76\n30\nNone or nonmetallic covering\n75\u00b0C(167\u00b0F)\nFixture wiring\n\n\nHeat-resistant cross-linked synthetic polymer-insulated fixture wire - solid or 7-strand\nRFHH-2*RFHH-3*\nCross-linked synthetic polymer\n18\u20141618\u201416\n0.761.14\n3045\nNone or nonmetallic covering\n90\u00b0C(194\u00b0F)\nFixture wiring\n\n\nSilicone insulated fixture wire - solid or 7-strand\nSF-1\nSilicone rubber\n18\n0.38\n15\nNonmetallic covering\n200\u00b0C(392\u00b0F)\nFixture wiring - limited to 300 volts\n\n\nSF-2\nSilicone rubber\n18\u20141210\n0.761.14\n3045\nNonmetallic covering\n200\u00b0C(392\u00b0F)\nFixture wiring\n\n\nSilicone insulated fixture wire - flexible stranding\nSFF-1\nSilicone rubber\n18\n0.38\n15\nNonmetallic covering\n150\u00b0C(302\u00b0F)\nFixture wiring - limited to 300 volts\n\n\nSFF-2\nSilicone rubber\n18\u20141210\n0.761.14\n3045\nNonmetallic covering\n150\u00b0C(302\u00b0F)\nFixture wiring\n\n\nThermoplastic covered fixture wire - solid or 7-strand\nTF*\nThermoplastic\n18\u201416\n0.76\n30\nNone\n60\u00b0C(140\u00b0F)\nFixture wiring\n\n\nThermoplastic covered fixture wire - flexible stranding\nTFF*\nThermoplastic\n18\u201416\n0.76\n30\nNone\n60\u00b0C(140\u00b0F)\nFixture wiring\n\n\nHeat-resistant thermoplastic covered fixture wire - solid or 7-strand\nTFN*\nThermoplastic\n18\u201416\n0.38\n15\nNylon-jacketed or equivalent\n90\u00b0C(194\u00b0F)\nFixture wiring\n\n\nHeat-resistant thermoplastic covered fixture wire - flexible stranded\nTFFN*\nThermoplastic\n18\u201416\n0.38\n15\nNylon-jacketed or equivalent\n90\u00b0C(194\u00b0F)\nFixture wiring\n\n\nCross-linked polyolefin insulated fixture wire - solid or 7-strand\nXF*\nCross-linked polyolefin\n18\u20141412\u201410\n0.761.14\n3045\nNone\n150\u00b0C(302\u00b0F)\nFixture wiring - limited to 300 volts\n\n\nCross-linked polyolefin insulated fixture wire - flexible stranded\nXFF*\nCross-linked polyolefin\n18\u20141412\u201410\n0.761.14\n3045\nNone\n150\u00b0C(302\u00b0F)\nFixture wiring - limited to 300 volts\n\n\nModified ETFE - solid or 7-strand\nZF\nModified ethylene tetrafluoroethylene\n18\u201414\n0.38\n15\nNone\n150\u00b0C(302\u00b0F)\nFixture wiring\n\n\nModified ETFE - flexible stranding\nZFF\nModified ethylene tetrafluoroethylene\n18\u201414\n0.38\n15\nNone\n150\u00b0C(302\u00b0F)\nFixture wiring\n\n\nHigh temp. modified ETFE- solid or 7-strand\nZHF\nModified ethylene tetrafluoroethylene\n18\u201414\n0.38\n15\nNone\n200\u00b0C(392\u00b0F)\nFixture wiring\n\n\n\n*Insulations and outer coverings that meet the requirements of flame retardant, limited smoke, and are so listed, shall be permitted to be marked for limited smoke after the Code type designation. [402.3](https://2023.antflix.net#402.3)", + "displayTitle": "402.3 Types", + "children": [], + "url": "https://2023.antflix.net#402.3" + }, + { + "body": "The ampacity of fixture wire shall be as specified in Table 402.5. No conductor shall be used under such conditions that its operating temperature exceeds the temperature specified in Table 402.3 for the type of insulation involved. Informational Note: See 310.14(A)(3) for temperature limitation of conductors.Table 402.5 Ampacity for Fixture Wires\n\n\n\nSize (AWG)\nAmpacity\n\n\n\n\n18\n6\n\n\n16\n8\n\n\n14\n17\n\n\n12\n23\n\n\n10\n28\n\n\n [402.5](https://2023.antflix.net#402.5)", + "displayTitle": "402.5 Ampacities for Fixture Wires", + "children": [], + "url": "https://2023.antflix.net#402.5" + }, + { + "body": "Fixture wires shall not be smaller than 18 AWG. [402.6](https://2023.antflix.net#402.6)", + "displayTitle": "402.6 Minimum Size", + "children": [], + "url": "https://2023.antflix.net#402.6" + }, + { + "body": "The number of fixture wires permitted in a single conduit or tubing shall not exceed the percentage fill specified in Table 1, Chapter 9. [402.7](https://2023.antflix.net#402.7)", + "displayTitle": "402.7 Number of Conductors in Conduit or Tubing", + "children": [], + "url": "https://2023.antflix.net#402.7" + }, + { + "body": "Fixture wires that are intended to be used as grounded conductors shall be identified by one or more continuous white stripes on other than green insulation or by the means described in 400.22(A) through (E). [402.8](https://2023.antflix.net#402.8)", + "displayTitle": "402.8 Grounded Conductor Identification", + "children": [], + "url": "https://2023.antflix.net#402.8" + }, + { + "displayTitle": "402.9 Marking", + "children": [ + { + "body": "Thermoplastic insulated fixture wire shall be durably marked on the surface at intervals not exceeding 610 mm (24 in.). All other fixture wire shall be marked by means of a printed tag attached to the coil, reel, or carton. [402.9_(A)](https://2023.antflix.net#402.9_(A))", + "displayTitle": "(A) Method of Marking", + "children": [], + "url": "https://2023.antflix.net#402.9_(A)" + }, + { + "body": "Fixture wire types listed in Table 402.3 shall be permitted to be surface marked to indicate special characteristics of the cable materials. These markings include, but are not limited to, markings for limited smoke, sunlight resistance, and so forth. [402.9_(B)](https://2023.antflix.net#402.9_(B))", + "displayTitle": "(B) Optional Marking", + "children": [], + "url": "https://2023.antflix.net#402.9_(B)" + } + ], + "url": "https://2023.antflix.net#402.9" + }, + { + "body": "Fixture wires shall be permitted (1) for installation in luminaires and in similar equipment where enclosed or protected and not subject to bending or twisting in use, or (2) for connecting luminaires to the branch-circuit conductors supplying the luminaires. [402.10](https://2023.antflix.net#402.10)", + "displayTitle": "402.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#402.10" + }, + { + "body": "Fixture wires shall not be used as branch-circuit conductors except as permitted elsewhere in this Code. [402.12](https://2023.antflix.net#402.12)", + "displayTitle": "402.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#402.12" + }, + { + "body": "Overcurrent protection for fixture wires shall be as specified in 240.5. [402.14](https://2023.antflix.net#402.14)", + "displayTitle": "402.14 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#402.14" + } + ], + "url": "https://2023.antflix.net#402" + }, + { + "displayTitle": "Article 404 Switches", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_57_I" + }, + { + "body": "This article covers all switches, switching devices, and circuit breakers used as switches operating at 1000 volts and below, unless specifically referenced elsewhere in this Code for higher voltages. This article does not cover wireless control equipment to which circuit conductors are not connected. Informational Note: See 210.70 for additional information related to branch circuits that include switches or listed wall-mounted control devices. [404.1](https://2023.antflix.net#404.1)", + "displayTitle": "404.1 Scope", + "children": [], + "url": "https://2023.antflix.net#404.1" + }, + { + "displayTitle": "404.2 Switch Connections", + "children": [ + { + "body": "Three-way and four-way switches shall be wired so that all switching is done only in the ungrounded circuit conductor. Where in metal raceways or metal-armored cables, wiring between switches and outlets shall be in accordance with 300.20(A). Exception: Switch loops shall not require a grounded conductor. [404.2_(A)](https://2023.antflix.net#404.2_(A))", + "displayTitle": "(A) Three-Way and Four-Way Switches", + "children": [], + "url": "https://2023.antflix.net#404.2_(A)" + }, + { + "body": "Switches or circuit breakers shall not disconnect the grounded conductor of a circuit.\nException: A switch or circuit breaker shall be permitted to disconnect a grounded circuit conductor where all circuit conductors are disconnected simultaneously, or where the device is arranged so that the grounded conductor cannot be disconnected until all the ungrounded conductors of the circuit have been disconnected. [404.2_(B)](https://2023.antflix.net#404.2_(B))", + "displayTitle": "(B) Grounded Conductors", + "children": [], + "url": "https://2023.antflix.net#404.2_(B)" + }, + { + "body": "The grounded circuit conductor for the controlled lighting circuit shall be installed at the location where switches control lighting loads that are supplied by a grounded general-purpose branch circuit serving bathrooms, hallways, stairways, and habitable rooms or occupiable spaces as defined in the applicable building code. Where multiple switch locations control the same lighting load such that the entire floor area of the room or space is visible from the single or combined switch locations, the grounded circuit conductor shall only be required at one location. A grounded conductor shall not be required to be installed at lighting switch locations under any of the following conditions: Where conductors enter the box enclosing the switch through a raceway, provided that the raceway is large enough for all contained conductors, including a grounded conductorWhere snap switches with integral enclosures comply with 300.15(E)Where lighting in the area is controlled by automatic meansWhere a switch controls a receptacle loadThe grounded conductor shall be extended to any switch location as necessary and shall be connected to switching devices that require line-to-neutral voltage to operate the electronics of the switch in the standby mode and shall meet the requirements of 404.22.Exception: The connection requirement shall not apply to replacement or retrofit switches installed in locations prior to local adoption of 404.2(C) and where the grounded conductor cannot be extended without removing finish materials. The number of electronic control switches on a branch circuit shall not exceed five, and the number connected to any feeder on the load side of a system or main bonding jumper shall not exceed 25. For the purpose of this exception, a neutral busbar, in compliance with 200.2(B) and to which a main or system bonding jumper is connected shall not be limited as to the number of electronic lighting control switches connected.Informational Note: The provision for a grounded conductor is to complete a circuit path for electronic lighting control devices. [404.2_(C)](https://2023.antflix.net#404.2_(C))", + "displayTitle": "(C) Switches Controlling Lighting Loads", + "children": [], + "url": "https://2023.antflix.net#404.2_(C)" + } + ], + "url": "https://2023.antflix.net#404.2" + }, + { + "displayTitle": "404.3 Enclosure", + "children": [ + { + "body": "Switches and circuit breakers shall be of the externally operable type mounted in an enclosure listed for the intended use. The minimum wire-bending space at terminals and minimum gutter space provided in switch enclosures shall be as required in 312.6. Exception No. 1: Pendant- and surface-type snap switches and knife switches mounted on an open-face switchboard or panelboard shall be permitted without enclosures. Exception No. 2: Switches and circuit breakers installed in accordance with 110.27(A)(1), (A)(2), (A)(3), or (A)(4) shall be permitted without enclosures. [404.3_(A)](https://2023.antflix.net#404.3_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#404.3_(A)" + }, + { + "body": "Enclosures shall not be used as junction boxes, auxiliary gutters, or raceways for conductors feeding through or tapping off to other switches or overcurrent devices, unless the enclosure complies with 312.8. [404.3_(B)](https://2023.antflix.net#404.3_(B))", + "displayTitle": "(B) Used as a Raceway", + "children": [], + "url": "https://2023.antflix.net#404.3_(B)" + } + ], + "url": "https://2023.antflix.net#404.3" + }, + { + "displayTitle": "404.4 Damp or Wet Locations", + "children": [ + { + "body": "A surface-mounted switch or circuit breaker shall be enclosed in a weatherproof enclosure or cabinet that complies with 312.2. [404.4_(A)](https://2023.antflix.net#404.4_(A))", + "displayTitle": "(A) Surface-Mounted Switch or Circuit Breaker", + "children": [], + "url": "https://2023.antflix.net#404.4_(A)" + }, + { + "body": "A flush-mounted switch or circuit breaker shall be equipped with a weatherproof cover. [404.4_(B)](https://2023.antflix.net#404.4_(B))", + "displayTitle": "(B) Flush-Mounted Switch or Circuit Breaker", + "children": [], + "url": "https://2023.antflix.net#404.4_(B)" + }, + { + "body": "Switches shall not be installed within tub or shower spaces unless installed as part of a listed tub or shower assembly. [404.4_(C)](https://2023.antflix.net#404.4_(C))", + "displayTitle": "(C) Switches in Tub or Shower Spaces", + "children": [], + "url": "https://2023.antflix.net#404.4_(C)" + } + ], + "url": "https://2023.antflix.net#404.4" + }, + { + "body": "Time switches, flashers, and similar devices shall be of the enclosed type or shall be mounted in cabinets or boxes or equipment enclosures. Energized parts shall be barriered to prevent operator exposure when making manual adjustments or switching. Exception: Devices mounted so they are accessible only to qualified persons shall be permitted, without barriers, provided they are located within an enclosure such that any energized parts within 152 mm (6.0 in.) of the manual adjustment or switch are. covered by suitable barriers. [404.5](https://2023.antflix.net#404.5)", + "displayTitle": "404.5 Time Switches, Flashers, and Similar Devices", + "children": [], + "url": "https://2023.antflix.net#404.5" + }, + { + "displayTitle": "404.6 Position and Connection of Switches", + "children": [ + { + "body": "Single-throw knife switches shall be placed so that gravity will not tend to close them. Single-throw knife switches, approved for use in the inverted position, shall be provided with an integral mechanical means that ensures that the blades remain in the open position when so set. [404.6_(A)](https://2023.antflix.net#404.6_(A))", + "displayTitle": "(A) Single-Throw Knife Switches", + "children": [], + "url": "https://2023.antflix.net#404.6_(A)" + }, + { + "body": "Double-throw knife switches shall be permitted to be mounted so that the throw is either vertical or horizontal. Where the throw is vertical, integral mechanical means shall be provided to hold the blades in the open position when so set. [404.6_(B)](https://2023.antflix.net#404.6_(B))", + "displayTitle": "(B) Double-Throw Knife Switches", + "children": [], + "url": "https://2023.antflix.net#404.6_(B)" + }, + { + "body": "Single-throw knife switches and switches with butt contacts shall be connected such that their blades are de-energized when the switch is in the open position. Bolted pressure contact switches shall have barriers that prevent inadvertent contact with energized blades. Single-throw knife switches, bolted pressure contact switches, molded case switches, switches with butt contacts, and circuit breakers used as switches shall be connected so that the terminals supplying the load are de-energized when the switch is in the open position. Exception: The blades and terminals supplying the load of a switch shall be permitted to be energized when the switch is in the open position where the switch is connected to circuits or equipment inherently capable of providing a backfeed source of power. For such installations, a permanent sign shall be installed on the switch enclosure or immediately adjacent to open switches with the following words or equivalent: WARNING - LOAD SIDE TERMINALS MAY BE ENERGIZED BY BACKFEED. The warning sign or label shall comply with 110.21(B). [404.6_(C)](https://2023.antflix.net#404.6_(C))", + "displayTitle": "(C) Connection of Switches", + "children": [], + "url": "https://2023.antflix.net#404.6_(C)" + } + ], + "url": "https://2023.antflix.net#404.6" + }, + { + "body": "General-use and motor-circuit switches, circuit breakers, and molded case switches, where mounted in an enclosure as described in 404.3, shall indicate, in a location that is visible when accessing the external operating means, whether they are in the open (off) or closed (on) position. Where these switch or circuit breaker handles are operated vertically rather than rotationally or horizontally, the up position of the handle shall be the closed (on) position. Exception No. 1: Vertically operated double-throw switches shall be permitted to be in the closed (on) position with the handle in either the up or down position. Exception No. 2: On busway installations, lap switches employing a center-pivoting handle shall be permitted to be open or closed with either end of the handle in the up or down position. The switch position shall be clearly indicating and shall be visible from the floor or from the usual point of operation. [404.7](https://2023.antflix.net#404.7)", + "displayTitle": "404.7 Indicating", + "children": [], + "url": "https://2023.antflix.net#404.7" + }, + { + "displayTitle": "404.8 Accessibility and Grouping", + "children": [ + { + "body": "All switches and circuit breakers used as switches shall be located so that they can be operated from a readily accessible place. They shall be installed such that the center of the grip of the operating handle of the switch or circuit breaker, when in its highest position, is not more than 2.0 m (6 ft 7 in.) above the floor or working platform, except as follows: On busway installations, fused switches and circuit breakers shall be permitted to be located at the same level as the busway. Suitable means shall be provided to operate the handle of the device from the floor.Switches and circuit breakers installed adjacent to motors, appliances, or other equipment that they supply shall be permitted to be located higher than 2.0 m (6 ft 7 in.) and to be accessible by portable means.Hookstick operable isolating switches shall be permitted at greater heights. [404.8_(A)](https://2023.antflix.net#404.8_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#404.8_(A)" + }, + { + "body": "A snap switch shall not be grouped or ganged in enclosures with other snap switches, receptacles, or similar devices, unless they are arranged so that the voltage between adjacent devices does not exceed 300 volts, or unless they are installed in enclosures equipped with identified, securely installed barriers between adjacent devices. [404.8_(B)](https://2023.antflix.net#404.8_(B))", + "displayTitle": "(B) Voltage Between Adjacent Devices", + "children": [], + "url": "https://2023.antflix.net#404.8_(B)" + }, + { + "body": "A multipole, general-use snap switch shall not be fed from more than a single circuit unless it is listed and marked as a two-circuit or three-circuit switch. Informational Note: See 210.7 for disconnect requirements where more than one circuit supplies a switch. [404.8_(C)](https://2023.antflix.net#404.8_(C))", + "displayTitle": "(C) Multipole Snap Switches", + "children": [], + "url": "https://2023.antflix.net#404.8_(C)" + } + ], + "url": "https://2023.antflix.net#404.8" + }, + { + "displayTitle": "404.9 General-Use Snap Switches, Dimmers, and Control Switches", + "children": [ + { + "body": "Faceplates provided for snap switches, dimmers, and control switches mounted in boxes and other enclosures shall be installed so as to completely cover the opening and, where the switch is flush mounted, seat against the finished surface. [404.9_(A)](https://2023.antflix.net#404.9_(A))", + "displayTitle": "(A) Faceplates", + "children": [], + "url": "https://2023.antflix.net#404.9_(A)" + }, + { + "body": "Snap switches, dimmers, and control switches shall be connected to an equipment grounding conductor and shall provide a means to connect metal faceplates to the equipment grounding conductor, whether or not a metal faceplate is installed. Metal faceplates shall be bonded to the equipment grounding conductor. Snap switches, dimmers, control switches, and metal faceplates shall be connected to an equipment grounding conductor using either of the following methods: The switch is mounted with metal screws to a metal box or metal cover that is connected to an equipment grounding conductor or to a nonmetallic box with integral means for connecting to an equipment grounding conductor.An equipment grounding conductor or equipment bonding jumper is connected to an equipment grounding termination of the snap switch.Exception No. 1: Where no means exists within the enclosure for bonding to the equipment grounding conductor, or where the wiring method does not include or provide an equipment grounding conductor, a snap switch without a connection to an equipment grounding conductor shall be permitted for replacement purposes only. A snap switch wired under the provisions of this exception and located within 2.5 m (8 ft) vertically, or 1.5 m (5 ft) horizontally, of ground or exposed grounded metal objects shall be provided with a faceplate of nonconducting noncombustible material with nonmetallic attachment screws, unless the switch mounting strap or yoke is nonmetallic or the circuit is protected by a ground-fault circuit interrupter.Exception No. 2: Listed kits or listed assemblies shall not be required to be bonded to an equipment grounding conductor if all of the following conditions are met:The device is provided with a nonmetallic faceplate, and the device is designed such that no metallic faceplate replaces the one provided.The device does not have mounting means to accept other configurations of faceplates.The device is equipped with a nonmetallic yoke.All parts of the device that are accessible after installation of the faceplate are manufactured of nonmetallic materials.Exception No. 3: A snap switch with integral nonmetallic enclosure complying with 300.15(E) shall be permitted without a bonding connection to an equipment grounding conductor. [404.9_(B)](https://2023.antflix.net#404.9_(B))", + "displayTitle": "(B) Grounding", + "children": [], + "url": "https://2023.antflix.net#404.9_(B)" + }, + { + "body": "Metal faceplates shall be of ferrous metal not less than 0.76 mm (0.030 in.) in thickness or of nonferrous metal not less than 1.02 mm (0.040 in.) in thickness. Faceplates of insulating material shall be noncombustible and not less than 2.54 mm (0.100 in.) in thickness, but they shall be permitted to be less than 2.54 mm (0.100 in.) in thickness if formed or reinforced to provide adequate mechanical strength. [404.9_(C)](https://2023.antflix.net#404.9_(C))", + "displayTitle": "(C) Construction", + "children": [], + "url": "https://2023.antflix.net#404.9_(C)" + } + ], + "url": "https://2023.antflix.net#404.9" + }, + { + "displayTitle": "404.10 Mounting of General-Use Snap Switches, Dimmers, and Control Switches", + "children": [ + { + "body": "General-use snap switches, dimmers, and control switches used with open wiring on insulators shall be mounted on insulating material that separates the conductors at least 13 mm (1/2 in.) from the surface wired over. [404.10_(A)](https://2023.antflix.net#404.10_(A))", + "displayTitle": "(A) Surface Type", + "children": [], + "url": "https://2023.antflix.net#404.10_(A)" + }, + { + "body": "Flush-type general-use snap switches, dimmers, and control switches mounted in boxes that are set back of the finished surface as permitted in 314.20 shall be installed so that the extension plaster ears are seated against the surface. Flush-type devices mounted in boxes that are flush with the finished surface or project from it shall be installed so that the mounting yoke or strap of the device is seated against the box. Screws used for the purpose of attaching a device to a box shall be of the type provided with a listed device, or shall be machine screws having 32 threads per inch or part of listed assemblies or systems, in accordance with the manufacturer's instructions. [404.10_(B)](https://2023.antflix.net#404.10_(B))", + "displayTitle": "(B) Box Mounted", + "children": [], + "url": "https://2023.antflix.net#404.10_(B)" + } + ], + "url": "https://2023.antflix.net#404.10" + }, + { + "body": "A hand-operable circuit breaker equipped with a lever or handle, or a power-operated circuit breaker capable of being opened by hand in the event of a power failure, shall be permitted to serve as a switch if it has the required number of poles. Informational Note: See 240.81 and 240.83 for requirements for circuit breakers relative to indication of state and required markings. [404.11](https://2023.antflix.net#404.11)", + "displayTitle": "404.11 Circuit Breakers as Switches", + "children": [], + "url": "https://2023.antflix.net#404.11" + }, + { + "body": "Metal enclosures for switches or circuit breakers shall be connected to an equipment grounding conductor as specified in Part IV of Article 250. Metal enclosures for switches or circuit breakers used as service equipment shall comply with the provisions of Part V of Article 250. Where nonmetallic enclosures are used with metal raceways or metal-armored cables, they shall comply with 314.3, Exception No. 1 or No. 2. Except as covered in 404.9(B), Exception No. 1, nonmetallic boxes for switches shall be installed with a wiring method that provides or includes an equipment grounding conductor. [404.12](https://2023.antflix.net#404.12)", + "displayTitle": "404.12 Grounding of Enclosures", + "children": [], + "url": "https://2023.antflix.net#404.12" + }, + { + "displayTitle": "404.13 Knife Switches", + "children": [ + { + "body": "Knife switches rated at over 1200 amperes at 250 volts or less, and at over 1000 amperes at 251 to 1000 volts, shall be used only as isolating switches and shall not be opened under load. [404.13_(A)](https://2023.antflix.net#404.13_(A))", + "displayTitle": "(A) Isolating Switches", + "children": [], + "url": "https://2023.antflix.net#404.13_(A)" + }, + { + "body": "To interrupt currents over 1200 amperes at 250 volts, nominal, or less, or over 600 amperes at 251 to 1000 volts, nominal, a circuit breaker or a switch listed for such purpose shall be used. [404.13_(B)](https://2023.antflix.net#404.13_(B))", + "displayTitle": "(B) To Interrupt Currents", + "children": [], + "url": "https://2023.antflix.net#404.13_(B)" + }, + { + "body": "Knife switches of ratings less than specified in 404.13(A) and (B) shall be considered general-use switches. Informational Note: See Article 100 for the definition of general-use switch. [404.13_(C)](https://2023.antflix.net#404.13_(C))", + "displayTitle": "(C) General-Use Switches", + "children": [], + "url": "https://2023.antflix.net#404.13_(C)" + }, + { + "body": "Motor-circuit switches shall be permitted to be of the knife-switch type. Informational Note: See Article 100 for the definition of motor-circuit switch. [404.13_(D)](https://2023.antflix.net#404.13_(D))", + "displayTitle": "(D) Motor-Circuit Switches", + "children": [], + "url": "https://2023.antflix.net#404.13_(D)" + } + ], + "url": "https://2023.antflix.net#404.13" + }, + { + "body": "Switches shall be listed and marked with their ratings. Switches of the types covered in 404.14(A) through (F) shall be limited to the control of loads as specified accordingly. Switches used to control cord-and-plug-connected loads shall be limited as covered in 404.14(G). Informational Note No. 1: See 600.6 for switches for signs and outline lighting. Informational Note No. 2: See 430.83, 430.109, and 430.110 for switches controlling motors. [404.14](https://2023.antflix.net#404.14)", + "displayTitle": "404.14 Rating and Use of Switches", + "children": [ + { + "body": "This form of switch shall only be used on ac circuits and used for controlling the following: Resistive and inductive loads not exceeding the ampere rating of the switch at the voltage appliedTungsten-filament lamp loads not exceeding the ampere rating of the switch at 120 voltsElectric discharge lamp loads not exceeding the marked ampere and voltage rating of the switchMotor loads not exceeding 80 percent of the ampere rating of the switch at its rated voltageElectronic ballasts, self-ballasted lamps, compact fluorescent lamps, and LED lamp loads with their associated drivers, not exceeding 20 amperes and not exceeding the ampere rating of the switch at the voltage applied [404.14_(A)](https://2023.antflix.net#404.14_(A))", + "displayTitle": "(A) Alternating-Current General-Use Snap Switch", + "children": [], + "url": "https://2023.antflix.net#404.14_(A)" + }, + { + "body": "This form of switch shall be permitted on either ac or dc circuits and used only for controlling the following: Resistive loads not exceeding the ampere rating of the switch at the voltage applied.Inductive loads not exceeding 50 percent of the ampere rating of the switch at the applied voltage. Switches rated in horsepower are suitable for controlling motor loads within their rating at the voltage applied.Tungsten-filament lamp loads not exceeding the ampere rating of the switch at the applied voltage if T-rated.Electronic ballasts, self-ballasted lamps, compact fluorescent lamps, and LED lamp loads with their associated drivers, not exceeding the ampere rating of the switch at the voltage applied. [404.14_(B)](https://2023.antflix.net#404.14_(B))", + "displayTitle": "(B) Alternating-Current or Direct-Current General-Use Snap Switch", + "children": [], + "url": "https://2023.antflix.net#404.14_(B)" + }, + { + "body": "Snap switches directly connected to aluminum conductors and rated 20 amperes or less shall be marked CO/ALR. [404.14_(C)](https://2023.antflix.net#404.14_(C))", + "displayTitle": "(C) CO/ALR Snap Switches", + "children": [], + "url": "https://2023.antflix.net#404.14_(C)" + }, + { + "body": "Snap switch terminations shall be in accordance with the following: Terminals of 15-ampere and 20-ampere snap switches not marked CO/ALR shall be used with copper and copper-clad aluminum conductors only.Terminals marked CO/ALR shall be permitted to be used with copper, aluminum, and copper-clad aluminum conductors.Snap switches connected using screwless terminals of the conductor push-in type construction (also known as conductor push-in terminals) shall be installed on not greater than 15-ampere branch circuits and shall be connected with 14 AWG solid copper wire only unless listed and marked for other types of conductors. [404.14_(D)](https://2023.antflix.net#404.14_(D))", + "displayTitle": "(D) Snap Switch Terminations", + "children": [], + "url": "https://2023.antflix.net#404.14_(D)" + }, + { + "body": "This form of switch shall not be rated less than 15 amperes at a voltage of 347 volts ac, and they shall not be readily interchangeable in box mounting with switches covered in 404.14(A) and (B). These switches shall be used only for controlling any of the following: Noninductive loads other than tungsten-filament lamps not exceeding the ampere and voltage ratings of the switch.Inductive loads not exceeding the ampere and voltage ratings of the switch. Where particular load characteristics or limitations are specified as a condition of the listing, those restrictions shall be observed regardless of the ampere rating of the load.Electronic ballasts, self-ballasted lamps, compact fluorescent lamps, and LED lamp loads with their associated drivers, not exceeding 20 amperes and not exceeding the ampere rating of the switch at the voltage applied. [404.14_(E)](https://2023.antflix.net#404.14_(E))", + "displayTitle": "(E) Alternating-Current General-Use Snap Switches Rated for 347 Volts", + "children": [], + "url": "https://2023.antflix.net#404.14_(E)" + }, + { + "body": "General-use dimmer switches and electronic control switches, such as timing switches and occupancy sensors, shall be used only to control permanently connected loads, such as incandescent luminaires, unless listed for the control of other loads and installed accordingly. They shall be marked by their manufacturer with their current and voltage ratings and used for loads that do not exceed their ampere rating at the voltage applied. [404.14_(F)](https://2023.antflix.net#404.14_(F))", + "displayTitle": "(F) Dimmer and Electronic Control Switches", + "children": [], + "url": "https://2023.antflix.net#404.14_(F)" + }, + { + "body": "Where a snap switch or control device is used to control cord-and-plug-connected equipment on a general-purpose branch circuit, each snap switch or control device controlling receptacle outlets or cord connectors that are supplied by permanently connected cord pendants shall be rated at not less than the rating of the maximum permitted ampere rating or setting of the overcurrent device protecting the receptacles or cord connectors, as provided in 210.21 (B). Informational Note: See 210.50(A) and 400.10(A)(1) for equivalency to a receptacle outlet of a cord connector that is supplied by a permanently connected cord pendant. Exception: Where a snap switch or control device is used to control not more than one receptacle on a branch circuit, the switch or control device shall be permitted to be rated at not less than the rating of the receptacle. [404.14_(G)](https://2023.antflix.net#404.14_(G))", + "displayTitle": "(G) Cord-and-Plug-Connected Loads", + "children": [], + "url": "https://2023.antflix.net#404.14_(G)" + } + ], + "url": "https://2023.antflix.net#404.14" + }, + { + "displayTitle": "404.16 Reconditioned Equipment", + "children": [ + { + "body": "Reconditioned lighting, dimmer, and electronic control switches shall not be permitted. [404.16_(A)](https://2023.antflix.net#404.16_(A))", + "displayTitle": "(A) Lighting, Dimmer, and Electronic Control Switches", + "children": [], + "url": "https://2023.antflix.net#404.16_(A)" + }, + { + "body": "Reconditioned snap switches of any type shall not be permitted. [404.16_(B)](https://2023.antflix.net#404.16_(B))", + "displayTitle": "(B) Snap Switches", + "children": [], + "url": "https://2023.antflix.net#404.16_(B)" + }, + { + "body": "Reconditioned knife switches, switches with butt contacts, and bolted pressure contact switches shall be permitted. If equipment has been damaged by fire, products of combustion, corrosive influences, or water, it shall be specifically evaluated by its manufacturer or a qualified testing laboratory prior to being returned to service. [404.16_(C)](https://2023.antflix.net#404.16_(C))", + "displayTitle": "(C) Knife Switches, Switches With Butt Contacts, and Bolted Pressure Contact Switches", + "children": [], + "url": "https://2023.antflix.net#404.16_(C)" + }, + { + "body": "Reconditioned molded-case switches shall not be permitted. [404.16_(D)](https://2023.antflix.net#404.16_(D))", + "displayTitle": "(D) Molded-Case Switches", + "children": [], + "url": "https://2023.antflix.net#404.16_(D)" + } + ], + "url": "https://2023.antflix.net#404.16" + }, + { + "displayTitle": "Part II Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_57_II" + }, + { + "displayTitle": "404.20 Marking", + "children": [ + { + "body": "Switches shall be marked with the current, voltage, and, if horsepower rated, the maximum rating for which they are designed. [404.20_(A)](https://2023.antflix.net#404.20_(A))", + "displayTitle": "(A) Ratings", + "children": [], + "url": "https://2023.antflix.net#404.20_(A)" + }, + { + "body": "Where in the off position, a switching device with a marked OFF position shall completely disconnect all ungrounded conductors to the load it controls. [404.20_(B)](https://2023.antflix.net#404.20_(B))", + "displayTitle": "(B) Off Indication", + "children": [], + "url": "https://2023.antflix.net#404.20_(B)" + } + ], + "url": "https://2023.antflix.net#404.20" + }, + { + "body": "Electronic control switches shall be listed. Electronic control switches shall not introduce current on the equipment grounding conductor during normal operation. Exception: Electronic control switches that introduce current on the equipment grounding conductor shall be permitted for applications covered by 404.2(C), Exception. Electronic control switches that introduce current on the equipment grounding conductor shall be listed and marked for use in replacement or retrofit applications only. [404.22](https://2023.antflix.net#404.22)", + "displayTitle": "404.22 Electronic Control Switches", + "children": [], + "url": "https://2023.antflix.net#404.22" + }, + { + "body": "Auxiliary contacts of a renewable or quick-break type or the equivalent shall be provided on all knife switches rated 600 to 1000 volts and designed for use in breaking current over 200 amperes. [404.26](https://2023.antflix.net#404.26)", + "displayTitle": "404.26 Knife Switches Rated 600 to 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#404.26" + }, + { + "body": "A fused switch shall not have fuses in parallel except as permitted in 240.8. [404.27](https://2023.antflix.net#404.27)", + "displayTitle": "404.27 Fused Switches", + "children": [], + "url": "https://2023.antflix.net#404.27" + }, + { + "body": "The wire-bending space required by 404.3 shall meet Table 312.6(B)(2) spacings to the enclosure wall opposite the line and load terminals. [404.28](https://2023.antflix.net#404.28)", + "displayTitle": "404.28 Wire-Bending Space", + "children": [], + "url": "https://2023.antflix.net#404.28" + }, + { + "body": "Switch mechanisms mounted within enclosures with doors that, when opened, expose uninsulated live parts shall be constructed so that when the switch is in the closed position access to the switch interior is restricted. Access to the interior with the switch in the closed position shall require the use of a tool or an approved design that provides equivalent protection from access by unqualified persons. [404.30](https://2023.antflix.net#404.30)", + "displayTitle": "404.30 Switch Enclosures With Doors", + "children": [], + "url": "https://2023.antflix.net#404.30" + } + ], + "url": "https://2023.antflix.net#404" + }, + { + "displayTitle": "Article 406 Receptacles, Cord Connectors, and Attachment Plugs (Caps)", + "children": [ + { + "body": "This article covers the rating, type, and installation of receptacles, cord connectors, and attachment plugs (cord caps). [406.1](https://2023.antflix.net#406.1)", + "displayTitle": "406.1 Scope", + "children": [], + "url": "https://2023.antflix.net#406.1" + }, + { + "body": "Reconditioned receptacles, attachment plugs, cord connectors, and flanged surface devices shall not be permitted. [406.2](https://2023.antflix.net#406.2)", + "displayTitle": "406.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#406.2" + }, + { + "displayTitle": "406.3 Receptacle Rating and Type", + "children": [ + { + "body": "Receptacles shall be listed and marked with the manufacturer's name or identification and voltage and ampere ratings. [406.3_(A)](https://2023.antflix.net#406.3_(A))", + "displayTitle": "(A) Receptacles", + "children": [], + "url": "https://2023.antflix.net#406.3_(A)" + }, + { + "body": "Receptacles and cord connectors shall be rated not less than 15 amperes, 125 volts, or 15 amperes, 250 volts, and shall be of a type not suitable for use as lampholders. Informational Note: See 210.21(B) for receptacle ratings where installed on branch circuits. [406.3_(B)](https://2023.antflix.net#406.3_(B))", + "displayTitle": "(B) Rating", + "children": [], + "url": "https://2023.antflix.net#406.3_(B)" + }, + { + "body": "Receptacles rated 20 amperes or less and designed for the direct connection of aluminum conductors shall be marked CO/ALR. [406.3_(C)](https://2023.antflix.net#406.3_(C))", + "displayTitle": "(C) CO/ALR Receptacles", + "children": [], + "url": "https://2023.antflix.net#406.3_(C)" + }, + { + "body": "Receptacle terminations shall be in accordance with the following: Terminals of 15-ampere and 20-ampere receptacles not marked CO/ALR shall be used with copper and copper-clad aluminum conductors only.Terminals marked CO/ALR shall be permitted to be used with aluminum, copper, and copper-clad aluminum conductors.Receptacles installed using screwless terminals of the conductor push-in type construction (also known as push-in-terminals) shall be installed on not greater than 15-ampere branch circuits and shall be connected with 14 AWG solid copper wire only unless listed and marked for other types of conductors.Informational Note: Sec UL 498, Attachment Plugs and Receptacles, for information regarding screwless terminals of various type constructions employed on receptacles. Screwless terminals of the separable-terminal assembly, spring-action clamp, and insulation-displacement type constructions are not classified in UL 498 as screwless terminals of the conductor push-in type construction (also known as push-in terminals). [406.3_(D)](https://2023.antflix.net#406.3_(D))", + "displayTitle": "(D) Receptacle Terminations", + "children": [], + "url": "https://2023.antflix.net#406.3_(D)" + }, + { + "body": "Receptacles incorporating an isolated equipment grounding conductor connection intended for the reduction of electromagnetic interference as permitted in 250.146(D) shall be identified by an orange triangle located on the face of the receptacle. [406.3_(E)](https://2023.antflix.net#406.3_(E))", + "displayTitle": "(E) Isolated Ground Receptacles", + "children": [ + { + "body": "Receptacles so identified shall be used only with equipment grounding conductors that are isolated in accordance with 250.146(D). [406.3_(E)_(1)](https://2023.antflix.net#406.3_(E)_(1))", + "displayTitle": "(1) Isolated Equipment Grounding Conductor Required", + "children": [], + "url": "https://2023.antflix.net#406.3_(E)_(1)" + }, + { + "body": "Isolated ground receptacles installed in nonmetallic boxes shall be covered with a nonmetallic faceplate. Exception: Where an isolated ground receptacle is installed in a nonmetallic box, a metal faceplate shall be permitted if the box contains a feature or accessory that permits the connection of the faceplate to the equipment grounding conductor. [406.3_(E)_(2)](https://2023.antflix.net#406.3_(E)_(2))", + "displayTitle": "(2) Installation in Nonmetallic Boxes", + "children": [], + "url": "https://2023.antflix.net#406.3_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#406.3_(E)" + }, + { + "body": "All nonlocking-type, 125-volt, 15- and 20-ampere receptacles that are controlled by an automatic control device, or that incorporate control features that remove power from the receptacle for the purpose of energy management or building automation, shall be permanently marked with the symbol shown in Figure 406.3(F) and the word \"controlled.\" For receptacles controlled by an automatic control device, the marking shall be located on the receptacle face and visible after installation. In both cases where a multiple receptacle device is used, the required marking of the word \"controlled\" and symbol shall denote which contact device(s) are controlled. Exception: The marking shall not be required for receptacles controlled by a wall switch that provide the required room lighting outlets as permitted by 210.70.\n\n FIGURE 406.3(F) Controlled Receptacle Marking Symbol. [406.3_(F)](https://2023.antflix.net#406.3_(F))", + "displayTitle": "(F) Controlled Receptacle Marking", + "children": [], + "url": "https://2023.antflix.net#406.3_(F)" + }, + { + "body": "A 125-volt 15- or 20-ampere receptacle that additionally provides Class 2 power shall be listed and constructed such that the Class 2 circuitry is integral with the receptacle. [406.3_(G)](https://2023.antflix.net#406.3_(G))", + "displayTitle": "(G) Receptacle With USB Charger", + "children": [], + "url": "https://2023.antflix.net#406.3_(G)" + } + ], + "url": "https://2023.antflix.net#406.3" + }, + { + "body": "Receptacle outlets shall be located in branch circuits in accordance with Part III of Article 210. General installation requirements shall be in accordance with 406.4(A) through (G). [406.4](https://2023.antflix.net#406.4)", + "displayTitle": "406.4 General Installation Requirements", + "children": [ + { + "body": "Except as provided in 406.4(D), receptacles installed on 15- and 20-ampere branch circuits shall be of the grounding type. Grounding-type receptacles shall be installed only on circuits of the voltage class and current for which they are rated, except as provided in 210.21(B)(1) for single receptacles or Table 210.21(B)(2) and Table 210.21(B)(3) for two or more receptacles. [406.4_(A)](https://2023.antflix.net#406.4_(A))", + "displayTitle": "(A) Grounding Type", + "children": [], + "url": "https://2023.antflix.net#406.4_(A)" + }, + { + "body": "Receptacles and cord connectors that have equipment grounding conductor contacts shall have those contacts connected to an equipment grounding conductor. Exception No. 1: Receptacles mounted on portable and vehicle-mounted generator sets and generators in accordance with 250.34. Exception No. 2: Replacement receptacles as permitted by 406.4(D). [406.4_(B)](https://2023.antflix.net#406.4_(B))", + "displayTitle": "(B) Connection to Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#406.4_(B)" + }, + { + "body": "The equipment grounding conductor contacts of receptacles shall be connected to an equipment grounding conductor of the circuit supplying the receptacle in accordance with 250.146. Cord connectors shall be connected to the equipment grounding conductor of the circuit supplying the cord connector. Informational Note No. 1: See 250.118 for acceptable grounding means. Informational Note No. 2: See 250.130 for extensions of existing branch circuits. [406.4_(C)](https://2023.antflix.net#406.4_(C))", + "displayTitle": "(C) Methods of Connection to Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#406.4_(C)" + }, + { + "body": "Replacement of receptacles shall comply with 406.4(D)(1) through (D)(8), as applicable. Arc-fault circuit-interrupter type and ground-fault circuit-interrupter type receptacles shall be installed in a readily accessible location. [406.4_(D)](https://2023.antflix.net#406.4_(D))", + "displayTitle": "(D) Replacements", + "children": [ + { + "body": "Where a grounding means exists in the receptacle enclosure or an equipment grounding conductor is installed in accordance with 250.130(C), grounding-type receptacles shall be used and shall be connected to the equipment grounding conductor in accordance with 406.4(C) or 250.130(C). [406.4_(D)_(1)](https://2023.antflix.net#406.4_(D)_(1))", + "displayTitle": "(1) Grounding-Type Receptacles", + "children": [], + "url": "https://2023.antflix.net#406.4_(D)_(1)" + }, + { + "body": "Where attachment to an equipment grounding conductor does not exist in the receptacle enclosure, the installation shall comply with 406.4(D)(2) (a), (D)(2) (b), or (D)(2) (c). A non-grounding-type receptacle(s) shall be permitted to be replaced with another non-grounding-type receptacle(s).A non-grounding-type receptacle(s) shall be permitted to be replaced with a ground-fault circuit interrupter-type of receptacle(s). These receptacles or their cover plates shall be marked \"No Equipment Ground.\" An equipment grounding conductor shall not be connected from the ground-fault circuit-interrupter-type receptacle to any outlet supplied from the ground-fault circuit-interrupter receptacle.A non-grounding-type receptacle(s) shall be permitted to be replaced with a grounding-type receptacle(s) where supplied through a ground-fault circuit interrupter. Where grounding-type receptacles are supplied through the ground-fault circuit interrupter, grounding-type receptacles or their cover plates shall be marked \"GFCI Protected\" and \"No Equipment Ground,\" visible after installation. An equipment grounding conductor shall not be connected between the grounding-type receptacles.Informational Note No. 1: Some equipment or appliance manufacturers require that the branch circuit to the equipment or appliance includes an equipment grounding conductor.Informational Note No. 2: See 250.114 for a list of a cord-and-plug-connected equipment or appliances that require an equipment grounding conductor. [406.4_(D)_(2)](https://2023.antflix.net#406.4_(D)_(2))", + "displayTitle": "(2) Non-Grounding-Type Receptacles", + "children": [], + "url": "https://2023.antflix.net#406.4_(D)_(2)" + }, + { + "body": "Ground-fault circuit-interrupter protection for receptacles shall be provided where replacements are made at receptacle outlets that are required to be so protected elsewhere in this Code. Ground-fault circuit interrupters shall be listed. Exception: Where the outlet box size will not permit the installation of the GFCI receptacle, the receptacle shall be permitted to be replaced with a new receptacle of the existing type, where GFCI protection is provided and the receptacle is marked \"GFCI Protected\" and \"No Equipment Ground,\" in accordance with 406.4(D)(2)(a), (D)(2)(b), or (D)(2)(c), as applicable. [406.4_(D)_(3)](https://2023.antflix.net#406.4_(D)_(3))", + "displayTitle": "(3) Ground-Fault Circuit-Interrupter Protection", + "children": [], + "url": "https://2023.antflix.net#406.4_(D)_(3)" + }, + { + "body": "If a receptacle located in any areas specified in 210.12(A), (B), or (C) is replaced, a replacement receptacle at this outlet shall be one of the following: A listed outlet branch-circuit type AFCI receptacleA receptacle protected by a listed outlet branch-circuit type AFCI type receptacleA receptacle protected by a listed combination type AFCI circuit breakerException: Section 210.12(E), Exception, shall not apply to replacement of receptacles. [406.4_(D)_(4)](https://2023.antflix.net#406.4_(D)_(4))", + "displayTitle": "(4) Arc-Fault Circuit-Interrupter Protection", + "children": [], + "url": "https://2023.antflix.net#406.4_(D)_(4)" + }, + { + "body": "Listed tamper-resistant receptacles shall be provided where replacements are made at receptacle outlets that are required to be tamper-resistant elsewhere in this Code, except in one of the following cases: Where a nongrounding receptacle is replaced with another nongrounding receptacleWhere aluminum branch-circuit conductors are directly terminated on a CO/ALR receptacle, installed as replacement [406.4_(D)_(5)](https://2023.antflix.net#406.4_(D)_(5))", + "displayTitle": "(5) Tamper-Resistant Receptacles", + "children": [], + "url": "https://2023.antflix.net#406.4_(D)_(5)" + }, + { + "body": "Weather-resistant receptacles shall be provided where replacements are made at receptacle outlets that are required to be so protected elsewhere in this Code. [406.4_(D)_(6)](https://2023.antflix.net#406.4_(D)_(6))", + "displayTitle": "(6) Weather-Resistant Receptacles", + "children": [], + "url": "https://2023.antflix.net#406.4_(D)_(6)" + }, + { + "body": "Automatically controlled receptacles shall be replaced with equivalently controlled receptacles. If automatic control is no longer required, the receptacle and any associated receptacles marked in accordance with 406.3(F) shall be replaced with a receptacle and faceplate not marked in accordance with 406.3(F). [406.4_(D)_(7)](https://2023.antflix.net#406.4_(D)_(7))", + "displayTitle": "(7) Controlled Receptacles", + "children": [], + "url": "https://2023.antflix.net#406.4_(D)_(7)" + }, + { + "body": "Receptacles shall be provided with GFPE where replacements are made at receptacle outlets that are required to be so protected elsewhere in this Code. [406.4_(D)_(8)](https://2023.antflix.net#406.4_(D)_(8))", + "displayTitle": "(8) Ground-Fault Protection of Equipment (GFPE)", + "children": [], + "url": "https://2023.antflix.net#406.4_(D)_(8)" + } + ], + "url": "https://2023.antflix.net#406.4_(D)" + }, + { + "body": "The installation of grounding-type receptacles shall not be used as a requirement that all cord-and plug-connected equipment be of the grounded type. Informational Note: See 250.114 for types of cord- and plug-connected equipment to be grounded. [406.4_(E)](https://2023.antflix.net#406.4_(E))", + "displayTitle": "(E) Cord- And Plug-Connected Equipment", + "children": [], + "url": "https://2023.antflix.net#406.4_(E)" + }, + { + "body": "Receptacles connected to circuits that have different voltages, frequencies, or types of current (ac or dc) on the same premises shall be of such design that the attachment plugs used on these circuits are not interchangeable. [406.4_(F)](https://2023.antflix.net#406.4_(F))", + "displayTitle": "(F) Noninterchangeable Types", + "children": [], + "url": "https://2023.antflix.net#406.4_(F)" + }, + { + "body": "Protection for floor receptacles shall be in accordance with the following: Physical protection of floor receptacles shall allow floor-cleaning equipment to be operated without damage to receptacles.All 125-volt, single-phase, 15- and 20-ampere floor receptacles installed in food courts and waiting spaces of passenger transportation facilities where food or drinks are allowed shall be GFCI protected. [406.4_(G)](https://2023.antflix.net#406.4_(G))", + "displayTitle": "(G) Protection of Floor Receptacles", + "children": [], + "url": "https://2023.antflix.net#406.4_(G)" + } + ], + "url": "https://2023.antflix.net#406.4" + }, + { + "body": "Receptacles shall be mounted in identified boxes or assemblies. The boxes or assemblies shall be securely fastened in place unless otherwise permitted elsewhere in this Code. Screws used for the purpose of attaching receptacles to a box shall be of the type provided with a listed receptacle, or shall be machine screws having 32 threads per inch or part of listed assemblies or systems, in accordance with the manufacturer's instructions. [406.5](https://2023.antflix.net#406.5)", + "displayTitle": "406.5 Receptacle Mounting", + "children": [ + { + "body": "Receptacles mounted in boxes that are set back from the finished surface as permitted in 314.20 shall be installed such that the mounting yoke or strap of the receptacle is held rigidly at the finished surface. [406.5_(A)](https://2023.antflix.net#406.5_(A))", + "displayTitle": "(A) Boxes That Are Set Back", + "children": [], + "url": "https://2023.antflix.net#406.5_(A)" + }, + { + "body": "Receptacles mounted in boxes that are flush with the finished surface or project therefrom shall be installed such that the mounting yoke or strap of the receptacle is held rigidly against the box or box cover. [406.5_(B)](https://2023.antflix.net#406.5_(B))", + "displayTitle": "(B) Boxes That Are Flush", + "children": [], + "url": "https://2023.antflix.net#406.5_(B)" + }, + { + "body": "Receptacles mounted to and supported by a cover shall be held rigidly against the cover by more than one screw or shall be a device assembly or box cover listed and identified for securing by a single screw. [406.5_(C)](https://2023.antflix.net#406.5_(C))", + "displayTitle": "(C) Receptacles Mounted on Covers", + "children": [], + "url": "https://2023.antflix.net#406.5_(C)" + }, + { + "body": "After installation, receptacle faces shall be flush with or project from faceplates of insulating material and shall project a minimum of 0.4 mm (0.015 in.) from metal faceplates. Exception: Listed kits or assemblies encompassing receptacles and nonmetallic faceplates that cover the receptacle face, where the plate cannot be installed on any other receptacle, shall be permitted. [406.5_(D)](https://2023.antflix.net#406.5_(D))", + "displayTitle": "(D) Position of Receptacle Faces", + "children": [], + "url": "https://2023.antflix.net#406.5_(D)" + }, + { + "body": "Receptacle assemblies for installation in countertop surfaces shall be listed for countertop applications. Where receptacle assemblies for countertop applications are required to provide ground-fault circuit-interrupter protection for personnel in accordance with 210.8, such assemblies shall be permitted to be listed as GFCI receptacle assemblies for countertop applications. [406.5_(E)](https://2023.antflix.net#406.5_(E))", + "displayTitle": "(E) Receptacles in Countertops", + "children": [], + "url": "https://2023.antflix.net#406.5_(E)" + }, + { + "body": "Receptacle assemblies and GFCI receptacle assemblies listed for work surface or countertop applications shall be permitted to be installed in work surfaces. [406.5_(F)](https://2023.antflix.net#406.5_(F))", + "displayTitle": "(F) Receptacles in Work Surfaces", + "children": [], + "url": "https://2023.antflix.net#406.5_(F)" + }, + { + "displayTitle": "(G) Receptacle Orientation", + "children": [ + { + "body": "Receptacles shall not be installed in a face-up position in or on countertop surfaces or work surfaces unless listed for countertop or work surface applications. [406.5_(G)_(1)](https://2023.antflix.net#406.5_(G)_(1))", + "displayTitle": "(1) Countertop and Work Surfaces", + "children": [], + "url": "https://2023.antflix.net#406.5_(G)_(1)" + }, + { + "body": "Receptacles shall not be installed in a face-up position in the area below a sink. [406.5_(G)_(2)](https://2023.antflix.net#406.5_(G)_(2))", + "displayTitle": "(2) Under Sinks", + "children": [], + "url": "https://2023.antflix.net#406.5_(G)_(2)" + } + ], + "url": "https://2023.antflix.net#406.5_(G)" + }, + { + "body": "In seating areas or similar surfaces, receptacles shall not be installed in a face-up position unless the receptacle is any of the following: Part of an assembly listed as a furniture power distribution unitPart of an assembly listed either as household furnishings or as commercial furnishingsListed either as a receptacle assembly for countertop applications or as a GFCI receptacle assembly for countertop applicationsInstalled in a listed floor box [406.5_(H)](https://2023.antflix.net#406.5_(H))", + "displayTitle": "(H) Receptacles in Seating Areas and Other Similar Surfaces", + "children": [], + "url": "https://2023.antflix.net#406.5_(H)" + }, + { + "body": "Receptacles shall be enclosed so that live wiring terminals are not exposed to contact. [406.5_(I)](https://2023.antflix.net#406.5_(I))", + "displayTitle": "(I) Exposed Terminals", + "children": [], + "url": "https://2023.antflix.net#406.5_(I)" + }, + { + "body": "A receptacle shall not be grouped or ganged in enclosures with other receptacles, snap switches, or similar devices, unless they are arranged so that the voltage between adjacent devices does not exceed 300 volts, or unless they are installed in enclosures equipped with identified, securely installed barriers between adjacent devices. [406.5_(J)](https://2023.antflix.net#406.5_(J))", + "displayTitle": "(J) Voltage Between Adjacent Devices", + "children": [], + "url": "https://2023.antflix.net#406.5_(J)" + } + ], + "url": "https://2023.antflix.net#406.5" + }, + { + "body": "Receptacle face-plates shall be installed so as to completely cover the opening and seat against the mounting surface. Receptacle faceplates mounted inside a box having a recess-mounted receptacle shall effectively close the opening and seat against the mounting surface. [406.6](https://2023.antflix.net#406.6)", + "displayTitle": "406.6 Receptacle Faceplates (Cover Plates)", + "children": [ + { + "body": "Metal faceplates shall be of ferrous metal not less than 0.76 mm (0.030 in.) in thickness or of nonferrous metal not less than 1.02 mm (0.040 in.) in thickness. [406.6_(A)](https://2023.antflix.net#406.6_(A))", + "displayTitle": "(A) Thickness of Metal Faceplates", + "children": [], + "url": "https://2023.antflix.net#406.6_(A)" + }, + { + "body": "Metal faceplates shall be grounded. [406.6_(B)](https://2023.antflix.net#406.6_(B))", + "displayTitle": "(B) Grounding", + "children": [], + "url": "https://2023.antflix.net#406.6_(B)" + }, + { + "body": "Faceplates of insulating material shall be noncombustible and not less than 2.54 mm (0.10 in.) in thickness but shall be permitted to be less than 2.54 mm (0.10 in.) in thickness if formed or reinforced to provide adequate mechanical strength. [406.6_(C)](https://2023.antflix.net#406.6_(C))", + "displayTitle": "(C) Faceplates of Insulating Material", + "children": [], + "url": "https://2023.antflix.net#406.6_(C)" + }, + { + "body": "A flush device cover plate that additionally provides a night light and/or Class 2 output connector(s) shall be listed and constructed such that the night light and/or Class 2 circuitry is integral with the flush device cover plate. Listed receptacle faceplates with integral night light, USB charger, or both, that rely solely on spring-tensioned contacts shall be connected to only brass or copper alloy receptacle terminal screws and shall be rated 1 watt or less. Exception: Effective January 1, 2026, spring-tensioned contact connections to steel receptacle terminal screws shall be permitted if the receptacle faceplate is specifically listed and identified for connection to steel receptacle terminal screws. [406.6_(D)](https://2023.antflix.net#406.6_(D))", + "displayTitle": "(D) Receptacle Faceplate (Cover Plates) With Integral Night Light and/or USB Charger", + "children": [], + "url": "https://2023.antflix.net#406.6_(D)" + } + ], + "url": "https://2023.antflix.net#406.6" + }, + { + "body": "All attachment plugs, cord connectors, and flanged surface devices (inlets and outlets) shall be listed and marked with the manufacturer's name or identification and voltage and ampere ratings. [406.7](https://2023.antflix.net#406.7)", + "displayTitle": "406.7 Attachment Plugs, Cord Connectors, and Flanged Surface Devices", + "children": [ + { + "body": "Attachment plugs and cord connectors shall be constructed so that there are no exposed current-carrying parts except the prongs, blades, or pins. The cover for wire terminations shall be a part that is essential for the operation of an attachment plug or connector (dead-front construction). [406.7_(A)](https://2023.antflix.net#406.7_(A))", + "displayTitle": "(A) Construction of Attachment Plugs and Cord Connectors", + "children": [], + "url": "https://2023.antflix.net#406.7_(A)" + }, + { + "body": "Attachment plugs shall be installed so that their prongs, blades, or pins are not energized unless inserted into an energized receptacle or cord connectors. No receptacle shall be installed so as to require the insertion of an energized attachment plug as its source of supply. [406.7_(B)](https://2023.antflix.net#406.7_(B))", + "displayTitle": "(B) Connection of Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#406.7_(B)" + }, + { + "body": "Attachment plug ejector mechanisms shall not adversely affect engagement of the blades of the attachment plug with the contacts of the receptacle. [406.7_(C)](https://2023.antflix.net#406.7_(C))", + "displayTitle": "(C) Attachment Plug Ejector Mechanisms", + "children": [], + "url": "https://2023.antflix.net#406.7_(C)" + }, + { + "body": "A flanged surface inlet shall be installed such that the prongs, blades, or pins are not energized unless an energized cord connector is inserted into it. [406.7_(D)](https://2023.antflix.net#406.7_(D))", + "displayTitle": "(D) Flanged Surface Inlet", + "children": [], + "url": "https://2023.antflix.net#406.7_(D)" + } + ], + "url": "https://2023.antflix.net#406.7" + }, + { + "body": "Receptacles, cord connectors, and attachment plugs shall be constructed such that receptacle or cord connectors do not accept an attachment plug with a different voltage or current rating from that for which the device is intended. However, a 20-ampere T-slot receptacle or cord connector shall be permitted to accept a 15-ampere attachment plug of the same voltage rating. Non-grounding-type receptacles and connectors shall not accept grounding-type attachment plugs. [406.8](https://2023.antflix.net#406.8)", + "displayTitle": "406.8 Noninterchangeability", + "children": [], + "url": "https://2023.antflix.net#406.8" + }, + { + "displayTitle": "406.9 Receptacles in Damp or Wet Locations", + "children": [ + { + "body": "A receptacle installed outdoors in a location protected from the weather or in other damp locations shall have an enclosure for the receptacle that is weatherproof when the receptacle is covered (attachment plug cap not inserted and receptacle covers closed). An installation suitable for wet locations shall also be considered suitable for damp locations. A receptacle shall be considered to be in a location protected from the weather where located under roofed open porches, canopies, marquees, and the like, and will not be subjected to a beating rain or water runoff. All 125- and 250-volt nonlocking receptacles shall be a listed weather-resistant type. Hinged covers of outlet box hoods shall be able to open at least 90 degrees, or fully open if the cover is not designed to open 90 degrees from the closed to open position, after installation. Informational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, for the types of receptacles covered by this requirement. [406.9_(A)](https://2023.antflix.net#406.9_(A))", + "displayTitle": "(A) Damp Locations", + "children": [], + "url": "https://2023.antflix.net#406.9_(A)" + }, + { + "displayTitle": "(B) Wet Locations", + "children": [ + { + "body": "Receptacles of 15 amperes and 20 amperes, 125 volts and 250 volts installed in a wet location shall have an enclosure that is weatherproof whether or not the attachment plug cap is inserted. An outlet box hood installed for this purpose shall be listed and shall be identified as extra-duty. Other listed products, enclosures, or assemblies providing weatherproof protection that do not utilize an outlet box hood need not be identified extra duty. Hinged covers of outlet box hoods shall be able to open at least 90 degrees, or fully open if the cover is not designed to open 90 degrees from the closed to open position, after installation. Informational Note No. 1: See ANSI/UL 514D-2016, Cover Plates for Flush-Mounted Wiring Devices, for extra-duty outlet box hoods. Extra duty identification and requirements are not applicable to listed receptacles, faceplates, outlet boxes, enclosures, or assemblies that are identified as either being suitable for wet locations or rated as one of the outdoor enclosure-type numbers of Table 110.28 that does not utilize an outlet box hood. Exception: 15- and 20-ampere, 125-through 250-volt receptacles installed in a wet location and subject to routine high-pressure spray washing shall be, permitted to have an enclosure that is weatherproof when the attachment plug is removed. All 15- and 20-ampere, 125- and 250-volt nonlocking-type receptacles shall be listed and so identified as the weather-resistant type. Informational Note No. 2: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, for receptacle configurations. The configuration of weather-resistant receptacles covered by this requirement are identified as 5-15, 5-20, 6-15, and 6-20. [406.9_(B)_(1)](https://2023.antflix.net#406.9_(B)_(1))", + "displayTitle": "(1) Receptacles of 15 Amperes and 20 Amperes in a Wet Location", + "children": [], + "url": "https://2023.antflix.net#406.9_(B)_(1)" + }, + { + "body": "All other receptacles installed in a wet location shall be listed weather-resistant type, and installation shall comply with 406.9(B)(2)(a) or (B)(2)(b). A receptacle installed in a wet location where the product intended to be plugged into it is not attended while in use shall have an enclosure that is weatherproof with the attachment plug cap inserted or removed.A receptacle installed in a wet location where the product intended to be plugged into it will be attended while in use (e.g., portable tools) shall have an enclosure that is weatherproof when the attachment plug is removed. [406.9_(B)_(2)](https://2023.antflix.net#406.9_(B)_(2))", + "displayTitle": "(2) Other Receptacles", + "children": [], + "url": "https://2023.antflix.net#406.9_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#406.9_(B)" + }, + { + "body": "Receptacles shall not be installed inside of the tub or shower or within a zone measured 900 mm (3 ft) horizontally from any outside edge of the bathtub or shower stall, including the space outside the bathtub or shower stall space below the zone. The zone also includes the space measured vertically from the floor to 2.5 m (8 ft) above the top of the bathtub rim or shower stall threshold. The identified zone is all-encompassing and shall include the space directly over the bathtub or shower stall and the space below this zone, but not the space separated by a floor, wall, ceiling, room door, window, or fixed barrier. Exception No. 1: Receptacles installed in accordance with 680.73 shall be permitted. Exception No. 2: In bathrooms with less than the required zone, the receptacle(s) required by 210.52(D) shall be permitted to be installed opposite the bathtub rim or shower stall threshold on the farthest wall within the room. Exception No. 3: Weight supporting ceiling receptacles (WSCR) shall be permitted to be installed for listed luminaires that employ a weight supporting attachment fitting (WSAF) in damp locations complying with 410.10(D). Exception No. 4: In a dwelling unit, a single receptacle shall be permitted for an electronic toilet or personal hygiene device such as an electronic bidet seat. The receptacle shall be readily accessible and not located in the space between the toilet and the bathtub or shower. Informational Note No. 1: See 210.8(A)(1) for GFCI requirements in a bathroom. Informational Note No. 2: See 210.11(C) for bathroom branch circuits. Informational Note No. 3: See 210.21(B)(1) for single receptacle on an individual branch. [406.9_(C)](https://2023.antflix.net#406.9_(C))", + "displayTitle": "(C) Bathtub and Shower Space", + "children": [], + "url": "https://2023.antflix.net#406.9_(C)" + }, + { + "body": "The enclosure for a receptacle installed in an outlet box flush-mounted in a finished surface shall be made weatherproof by means of a weatherproof faceplate assembly that provides a watertight connection between the plate and the finished surface. [406.9_(D)](https://2023.antflix.net#406.9_(D))", + "displayTitle": "(D) Flush Mounting With Faceplate", + "children": [], + "url": "https://2023.antflix.net#406.9_(D)" + } + ], + "url": "https://2023.antflix.net#406.9" + }, + { + "displayTitle": "406.10 Grounding-Type Receptacles, Adapters, Cord Connectors, and Attachment Plugs", + "children": [ + { + "body": "Grounding-type receptacles, cord connectors, and attachment plugs shall be provided with one fixed grounding pole in addition to the circuit poles. The grounding contacting pole of grounding-type plug-in ground-fault circuit interrupters shall be permitted to be of the movable, self-restoring type on circuits operating at not over 150 volts between any two conductors or any conductor and ground. [406.10_(A)](https://2023.antflix.net#406.10_(A))", + "displayTitle": "(A) Grounding Poles (Connections)", + "children": [], + "url": "https://2023.antflix.net#406.10_(A)" + }, + { + "body": "Grounding-type receptacles, adapters, cord connections, and attachment plugs shall have a means for connection of an equipment grounding conductor to the grounding pole. A terminal for connection to the grounding pole shall be designated by one of the following:A green-colored hexagonal-headed or -shaped terminal screw or nut, not readily removable.A green-colored pressure wire connector body (a wire barrel).A similar green-colored connection device, in the case of adapters. The grounding terminal of a grounding adapter shall be a green-colored rigid ear, lug, or similar device. The equipment grounding connection shall be so designed that it cannot make contact with current-carrying parts of the receptacle, adapter, or attachment plug. The adapter shall be polarized.If the terminal for the equipment grounding conductor is not visible, the conductor entrance hole shall be marked with the word green or ground, the letters G or GR, a grounding symbol, or otherwise identified by a distinctive green color. If the terminal for the equipment grounding conductor is readily removable, the area adjacent to the terminal shall be similarly marked.\n\n\n\nInformational Note: See Informational Note Figure 406.10(B).\n\n Informational Note Figure 406.10(B) One Example of a Symbol Used to Identify the Termination Point for an Equipment Grounding Conductor. [406.10_(B)](https://2023.antflix.net#406.10_(B))", + "displayTitle": "(B) Grounding-Pole (Connection) Identification", + "children": [], + "url": "https://2023.antflix.net#406.10_(B)" + }, + { + "body": "A grounding terminal shall not be used for purposes other than connection to the equipment grounding conductor. [406.10_(C)](https://2023.antflix.net#406.10_(C))", + "displayTitle": "(C) Grounding Terminal Use", + "children": [], + "url": "https://2023.antflix.net#406.10_(C)" + }, + { + "body": "Grounding-type attachment plugs and mating cord connectors and receptacles shall be designed such that the equipment grounding connection is made before the current-carrying connections. Grounding-type devices shall be so designed that grounding poles of attachment plugs cannot be brought into contact with current-carrying parts of receptacles or cord connectors. [406.10_(D)](https://2023.antflix.net#406.10_(D))", + "displayTitle": "(D) Grounding-Pole (Connection) Requirements", + "children": [], + "url": "https://2023.antflix.net#406.10_(D)" + }, + { + "body": "Grounding-type attachment plugs shall be used only with a cord having an equipment grounding conductor. Informational Note: See 250.126 for identification of equipment grounding conductor terminals. [406.10_(E)](https://2023.antflix.net#406.10_(E))", + "displayTitle": "(E) Use", + "children": [], + "url": "https://2023.antflix.net#406.10_(E)" + } + ], + "url": "https://2023.antflix.net#406.10" + }, + { + "body": "The connection of the receptacle grounding terminal shall comply with 250.146. [406.11](https://2023.antflix.net#406.11)", + "displayTitle": "406.11 Connecting Receptacle Grounding Terminal to Box", + "children": [], + "url": "https://2023.antflix.net#406.11" + }, + { + "body": "All 15- and 20-ampere, 125- and 250-volt nonlocking-type receptacles in the following locations shall be listed tamper-resistant receptacles: All dwelling units, boathouses, mobile homes and manufactured homes, including their attached and detached garages, accessory buildings, and common areasGuest rooms and guest suites of hotels, motels, and their common areasChild care facilitiesPreschools and education facilitiesWithin clinics, medical and dental offices, and outpatient facilities, the following spaces:Business offices accessible to the general publicLobbies, and waiting spacesSpaces of nursing homes and limited care facilities covered in 517.10(B)(2)Places of awaiting transportation, gymnasiums, skating rinks, fitness centers, and auditoriumsDormitory unitsResidential care/assisted living facilities, social and substance abuse rehabilitation facilities, and group homesFoster care facilities, nursing homes, and psychiatric hospitalsAreas of agricultural buildings accessible to the general public and any common areasInformational Note No. 1: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications. This requirement would include receptacles identified as 5-15, 5-20, 6-15, and 6-20.Informational Note No. 2: See NFPA 5000-2021, Building Construction and Safety Code, and the International Building Code (IBC)-2021 for more information on occupancy classifications for the types of facilities covered by this requirement.Informational Note No. 3: Areas of agricultural building are frequently converted to hospitality areas. These areas can include petting zoos, stables, and buildings used for recreation or educational purposes where receptacles are installed.Exception to (1) through (10): Receptacles in the following locations shall not be required to be tamper resistant:Receptacles located more than 1.7 m (51/2 ft) above the floorReceptacles that are part of a luminaire or applianceWhere the receptacle outlet is installed within the space occupied by or designated for each appliance that, in normal use, is not easily moved from one place to another and is cord-and-plug-connected in accordance with 400.10(A)(6), (A)(7), or (A)(8) the following are permitted:A single receptacle that is not readily accessible and supplies one applianceA duplex receptacle that is not readily accessible and supplies two appliancesNongrounding receptacles used for replacements as permitted in 406.4(D)(2)(a) [406.12](https://2023.antflix.net#406.12)", + "displayTitle": "406.12 Tamper-Resistant Receptacles", + "children": [], + "url": "https://2023.antflix.net#406.12" + }, + { + "body": "Single-pole separable connectors shall be listed and labeled and shall comply with 406.13(A) through (D). [406.13](https://2023.antflix.net#406.13)", + "displayTitle": "406.13 Single-Pole Separable-Connector Type", + "children": [ + { + "body": "Single-pole separable connectors shall be of either the locking or latching type and marked with the manufacturer's name or identification and voltage and ampere ratings. [406.13_(A)](https://2023.antflix.net#406.13_(A))", + "displayTitle": "(A) Locking or Latching Type", + "children": [], + "url": "https://2023.antflix.net#406.13_(A)" + }, + { + "body": "Connectors designated for connection to the grounded circuit conductor shall be identified by a white-colored housing; connectors designated for connection to the grounding circuit conductor shall be identified by a green-colored housing. [406.13_(B)](https://2023.antflix.net#406.13_(B))", + "displayTitle": "(B) Identification", + "children": [], + "url": "https://2023.antflix.net#406.13_(B)" + }, + { + "body": "Single-pole separable connectors shall be permitted to be interchangeable for ac or dc use or for different current ratings or voltages on the same premises, provided they are listed for ac/dc use and marked in a suitable manner to identify the system to which they are intended to be connected. [406.13_(C)](https://2023.antflix.net#406.13_(C))", + "displayTitle": "(C) Interchangeability", + "children": [], + "url": "https://2023.antflix.net#406.13_(C)" + }, + { + "body": "The use of single-pole separable connectors shall be performed by a qualified person and shall comply with at least one of the following conditions: Connection and disconnection of connectors are only possible where the supply connectors are interlocked to the source, and it is not possible to connect or disconnect connectors when the supply is energized.Line connectors are of the listed sequential-interlocking type so that load connectors are connected in the following sequence and that disconnection is in the reverse sequence:Equipment grounding conductor connectionGrounded circuit conductor connection, if providedUngrounded conductor connectionA caution notice that complies with 110.21 (B) is provided on the equipment employing single-pole separable connectors, adjacent to the line connectors, indicating that connections are to be performed in the following sequence and that disconnection is in the reverse sequence:Equipment grounding conductor connectorsGrounded circuit-conductor connectors, if providedUngrounded conductor connectorsInformational Note: See ANSI-UL 1691-2014, Single Pole Locking-Type Separable Connectors, for more information on single-pole locking-type separable connectors. [406.13_(D)](https://2023.antflix.net#406.13_(D))", + "displayTitle": "(D) Connecting and Disconnecting", + "children": [], + "url": "https://2023.antflix.net#406.13_(D)" + } + ], + "url": "https://2023.antflix.net#406.13" + } + ], + "url": "https://2023.antflix.net#406" + }, + { + "displayTitle": "Article 408 Switchboards, Switchgear, and Panelboards", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_58_I" + }, + { + "body": "This article covers switchboards, switchgear, and panelboards. It does not apply to equipment operating at over 1000 volts, except as specifically referenced elsewhere in the Code. [408.1](https://2023.antflix.net#408.1)", + "displayTitle": "408.1 Scope", + "children": [], + "url": "https://2023.antflix.net#408.1" + }, + { + "body": "The use of reconditioned equipment within the scope of this article shall be limited as described in 408.2(A) and (B). If equipment has been damaged by fire, products of combustion, corrosive influences, or water, it shall be specifically evaluated by its manufacturer or a qualified testing laboratory prior to being returned to service. [408.2](https://2023.antflix.net#408.2)", + "displayTitle": "408.2 Reconditioned Equipment", + "children": [ + { + "body": "Reconditioned panelboards shall not be permitted. [408.2_(A)](https://2023.antflix.net#408.2_(A))", + "displayTitle": "(A) Panelboards", + "children": [], + "url": "https://2023.antflix.net#408.2_(A)" + }, + { + "body": "Reconditioned switchboards and switchgear, or sections of switchboards or switchgear, shall be permitted. [408.2_(B)](https://2023.antflix.net#408.2_(B))", + "displayTitle": "(B) Switchboards and Switchgear", + "children": [], + "url": "https://2023.antflix.net#408.2_(B)" + } + ], + "url": "https://2023.antflix.net#408.2" + }, + { + "displayTitle": "408.3 Support and Arrangement of Busbars and Conductors", + "children": [ + { + "body": "Conductors and busbars on a switchboard, switchgear, or panelboard shall comply with 408.3(A)(1) and (A)(2) as applicable. [408.3_(A)](https://2023.antflix.net#408.3_(A))", + "displayTitle": "(A) Conductors and Busbars on a Switchboard, Switchgear, or Panelboard", + "children": [ + { + "body": "Conductors and busbars shall be located so as to be free from physical damage and shall be held firmly in place. [408.3_(A)_(1)](https://2023.antflix.net#408.3_(A)_(1))", + "displayTitle": "(1) Location", + "children": [], + "url": "https://2023.antflix.net#408.3_(A)_(1)" + }, + { + "body": "Other than the required interconnections and control wiring, only those conductors that are intended for termination in a vertical section of a switchboard or switchgear shall be located in that section. Exception: Conductors shall be permitted to travel horizontally through vertical sections of switchboards and switchgear where such conductors are isolated from busbars by a barrier. [408.3_(A)_(2)](https://2023.antflix.net#408.3_(A)_(2))", + "displayTitle": "(2) Same Vertical Section", + "children": [], + "url": "https://2023.antflix.net#408.3_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#408.3_(A)" + }, + { + "body": "The arrangement of busbars and conductors shall be such as to avoid overheating due to inductive effects. [408.3_(B)](https://2023.antflix.net#408.3_(B))", + "displayTitle": "(B) Overheating and Inductive Effects", + "children": [], + "url": "https://2023.antflix.net#408.3_(B)" + }, + { + "body": "Each switchboard, switchgear, or panelboard, if used as service equipment, shall be provided with a main bonding jumper sized in accordance with 250.28(D) or the equivalent placed within the panelboard or one of the sections of the switchboard or switchgear for connecting the grounded service conductor on its supply side to the switchboard, switchgear, or panelboard frame. All sections of a switchboard or switchgear shall be bonded together using an equipment-bonding jumper or a supply-side bonding jumper sized in accordance with 250.122 or 250.102(C)(1) as applicable. Exception: Switchboards, switchgear, and panelboards used as service equipment on high-impedance grounded neutral systems in accordance with 250.36 shall not be required to be provided with a main bonding jumper. [408.3_(C)](https://2023.antflix.net#408.3_(C))", + "displayTitle": "(C) Used as Service Equipment", + "children": [], + "url": "https://2023.antflix.net#408.3_(C)" + }, + { + "body": "In switchboards and switchgear, load terminals for field wiring shall comply with 408.18(C). [408.3_(D)](https://2023.antflix.net#408.3_(D))", + "displayTitle": "(D) Terminals", + "children": [], + "url": "https://2023.antflix.net#408.3_(D)" + }, + { + "displayTitle": "(E) Bus Arrangement", + "children": [ + { + "body": "Alternating-current phase arrangement on 3-phase buses shall be A, B, C from front to back, top to bottom, or left to right, as viewed from the front of the switchboard, switchgear, or panelboard. The B phase shall be that phase having the higher voltage to ground on 3-phase, 4-wire, delta-connected systems. Other busbar arrangements shall be permitted for additions to existing installations and shall be marked. Exception: Equipment within the same single section or multisection switchboard, switchgear, or panelboard as the meter on 3-phase, 4-wire, delta-connected systems shall be permitted to have the same phase configuration as the metering equipment. Informational Note: See 110.15 for requirements on marking the busbar or phase conductor having the higher voltage to ground where supplied from a 4-wire, delta-connected system. [408.3_(E)_(1)](https://2023.antflix.net#408.3_(E)_(1))", + "displayTitle": "(1) AC Phase Arrangement", + "children": [], + "url": "https://2023.antflix.net#408.3_(E)_(1)" + }, + { + "body": "Direct-current ungrounded buses shall be permitted to be in any order. Arrangement of dc buses shall be field marked as to polarity, grounding system, and nominal voltage. [408.3_(E)_(2)](https://2023.antflix.net#408.3_(E)_(2))", + "displayTitle": "(2) DC Bus Arrangement", + "children": [], + "url": "https://2023.antflix.net#408.3_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#408.3_(E)" + }, + { + "body": "A caution sign(s) or a label(s) provided in accordance with 408.3(F)(1) through (F)(5) shall comply with 110.21(B). [408.3_(F)](https://2023.antflix.net#408.3_(F))", + "displayTitle": "(F) Switchboard, Switchgear, or Panelboard Identification", + "children": [ + { + "body": "A switchboard, switchgear, or panelboard containing a 4-wire, delta-connected system where the midpoint of one phase winding is grounded shall be legibly and permanently field marked as follows: CAUTION _____ PHASE HAS _____ VOLTS TO GROUND [408.3_(F)_(1)](https://2023.antflix.net#408.3_(F)_(1))", + "displayTitle": "(1) High-Leg Identification", + "children": [], + "url": "https://2023.antflix.net#408.3_(F)_(1)" + }, + { + "body": "A switchboard, switchgear, or panelboard containing an ungrounded ac electrical system as permitted in 250.21 shall be legibly and permanently field marked as follows: CAUTION UNGROUNDED SYSTEM OPERATING - _____ VOLTS BETWEEN CONDUCTORS [408.3_(F)_(2)](https://2023.antflix.net#408.3_(F)_(2))", + "displayTitle": "(2) Ungrounded AC Systems", + "children": [], + "url": "https://2023.antflix.net#408.3_(F)_(2)" + }, + { + "body": "A switchboard, switchgear, or panelboard containing a high-impedance grounded neutral ac system in accordance with 250.36 shall be legibly and permanently field marked as follows: CAUTION: HIGH-IMPEDANCE GROUNDED NEUTRAL AC SYSTEM OPERATING - _____ VOLTS BETWEEN CONDUCTORS AND MAY OPERATE - _____ VOLTS TO GROUND FOR INDEFINITE PERIODS UNDER FAULT CONDITIONS [408.3_(F)_(3)](https://2023.antflix.net#408.3_(F)_(3))", + "displayTitle": "(3) High-Impedance Grounded Neutral AC System", + "children": [], + "url": "https://2023.antflix.net#408.3_(F)_(3)" + }, + { + "body": "A switchboard, switchgear, or panelboard containing an ungrounded dc electrical system in accordance with 250.169 shall be legibly and permanently field marked as follows: CAUTION: UNGROUNDED DC SYSTEM OPERATING - _____ VOLTS BETWEEN CONDUCTORS [408.3_(F)_(4)](https://2023.antflix.net#408.3_(F)_(4))", + "displayTitle": "(4) Ungrounded DC Systems", + "children": [], + "url": "https://2023.antflix.net#408.3_(F)_(4)" + }, + { + "body": "A switchboard, switchgear, or panelboard containing a resistive connection between current-carrying conductors and the grounding system to stabilize voltage to ground shall be legibly and permanently field marked as follows: CAUTION: DC SYSTEM OPERATING - _____ VOLTS BETWEEN CONDUCTORS AND MAY OPERATE - _____ VOLTS TO GROUND FOR INDEFINITE PERIODS UNDER FAULT CONDITIONS [408.3_(F)_(5)](https://2023.antflix.net#408.3_(F)_(5))", + "displayTitle": "(5) Resistively Grounded DC Systems", + "children": [], + "url": "https://2023.antflix.net#408.3_(F)_(5)" + } + ], + "url": "https://2023.antflix.net#408.3_(F)" + }, + { + "body": "The minimum wire-bending space at terminals and minimum gutter space provided in switchboards, switchgear, and panelboards shall be as required in 312.6. [408.3_(G)](https://2023.antflix.net#408.3_(G))", + "displayTitle": "(G) Minimum Wire-Bending Space", + "children": [], + "url": "https://2023.antflix.net#408.3_(G)" + } + ], + "url": "https://2023.antflix.net#408.3" + }, + { + "displayTitle": "408.4 Descriptions Required", + "children": [ + { + "body": "Every circuit and circuit modification shall be provided with a legible and permanent description that complies with all of the following conditions as applicable: Located at each switch or circuit breaker in a switchboard or switchgearIncluded in a circuit directory that is located on the face of, inside of, or in an approved location adjacent to the panel door in the case of a panelboardClear, evident, and specific to the purpose or use of each circuit including spare positions with an unused overcurrent deviceDescribed with a degree of detail and clarity that is unlikely to result in confusion between circuitsNot dependent on transient conditions of occupancyClear in explaining abbreviations and symbols when used [408.4_(A)](https://2023.antflix.net#408.4_(A))", + "displayTitle": "(A) Circuit Directory or Circuit Description", + "children": [], + "url": "https://2023.antflix.net#408.4_(A)" + }, + { + "body": "All switchboards, switchgear, and panelboards supplied by a feeder(s) in other than one- or two-family dwellings shall be permanently marked in accordance with the following: With the identification and physical location of where the power originatesWith a label that is permanently affixed and of sufficient durability to withstand the environment involvedUsing a method that is not handwritten [408.4_(B)](https://2023.antflix.net#408.4_(B))", + "displayTitle": "(B) Source of Supply", + "children": [], + "url": "https://2023.antflix.net#408.4_(B)" + } + ], + "url": "https://2023.antflix.net#408.4" + }, + { + "body": "Where conduits or other raceways enter a switchboard, switchgear, floor-standing panelboard, or similar enclosure at the bottom, approved space shall be provided to permit installation of conductors in the enclosure. The wiring space shall not be less than shown in Table 408.5 where the conduit or raceways enter or leave the enclosure below the busbars, their supports, or other obstructions. The conduit or raceways, including their end fittings, shall not rise more than 75 mm (3 in.) above the bottom of the enclosure.\nTable 408.5 Clearance for Conductors Entering Bus Enclosures\n\n\n\nConductor\nMinimum Spacing Between Bottom of Enclosure and Busbars, Their Supports, or Other Obstructions\n\n\nmm\nin.\n\n\n\n\nInsulated busbars, their supports, or other obstructions\n200\n8\n\n\nNoninsulated busbars\n250\n10\n\n\n [408.5](https://2023.antflix.net#408.5)", + "displayTitle": "408.5 Clearance for Conductor Entering Bus Enclosures", + "children": [], + "url": "https://2023.antflix.net#408.5" + }, + { + "body": "Switchboards, switchgear, and panelboards shall have a short-circuit current rating not less than the available fault current. In other than one- and two-family dwelling units, the available fault current and the date the calculation was performed shall be field marked on the enclosure at the point of supply. The marking shall comply with 110.21(B)(3). [408.6](https://2023.antflix.net#408.6)", + "displayTitle": "408.6 Short-Circuit Current Rating", + "children": [], + "url": "https://2023.antflix.net#408.6" + }, + { + "body": "Unused openings for circuit breakers and switches shall be closed using identified closures, or other approved means that provide protection substantially equivalent to the wall of the enclosure. [408.7](https://2023.antflix.net#408.7)", + "displayTitle": "408.7 Unused Openings", + "children": [], + "url": "https://2023.antflix.net#408.7" + }, + { + "body": "Replacement panelboards shall be permitted to be installed in existing enclosures in accordance with 408.9(A) or (B). [408.9](https://2023.antflix.net#408.9)", + "displayTitle": "408.9 Replacement Panelboards", + "children": [ + { + "body": "If the replacement panelboard is listed for the specific enclosure identified by either catalog number or dimensional information, the panelboard shall be permitted to maintain its short-circuit current rating. [408.9_(A)](https://2023.antflix.net#408.9_(A))", + "displayTitle": "(A) Panelboards Listed for the Specific Enclosure", + "children": [], + "url": "https://2023.antflix.net#408.9_(A)" + }, + { + "body": "If the available fault current is greater than 10,000 amperes, the completed work shall be field labeled. If the available fault current is 10,000 amperes or less, the replacement panelboard shall be identified for the application. Any previously applied listing marks on the cabinet that pertain to the panelboard shall be removed. [408.9_(B)](https://2023.antflix.net#408.9_(B))", + "displayTitle": "(B) Panelboards Not Listed for the Specific Enclosure", + "children": [], + "url": "https://2023.antflix.net#408.9_(B)" + } + ], + "url": "https://2023.antflix.net#408.9" + }, + { + "displayTitle": "Part II Switchboards and Switchgear", + "children": [], + "url": "https://2023.antflix.net#divider_58_II" + }, + { + "body": "Switchboards and switchgear in damp or wet locations shall be installed in accordance with 312.2. [408.16](https://2023.antflix.net#408.16)", + "displayTitle": "408.16 Switchboards and Switchgear in Damp or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#408.16" + }, + { + "body": "Switchboards and switchgear shall be placed so as to reduce to a minimum the probability of communicating fire to adjacent combustible materials. Where installed over a combustible floor, suitable protection thereto shall be provided. [408.17](https://2023.antflix.net#408.17)", + "displayTitle": "408.17 Location Relative to Easily Ignitible Material", + "children": [], + "url": "https://2023.antflix.net#408.17" + }, + { + "displayTitle": "408.18 Clearances", + "children": [ + { + "body": "For other than a totally enclosed switchboard or switchgear, a space not less than 900 mm (3 ft) shall be provided between the top of the switchboard or switchgear and any combustible ceiling, unless a noncombustible shield is provided between the switchboard or switchgear and the ceiling. [408.18_(A)](https://2023.antflix.net#408.18_(A))", + "displayTitle": "(A) From Ceiling", + "children": [], + "url": "https://2023.antflix.net#408.18_(A)" + }, + { + "body": "Clearances around switchboards and switchgear shall comply with the provisions of 110.26. [408.18_(B)](https://2023.antflix.net#408.18_(B))", + "displayTitle": "(B) Around Switchboards and Switchgear", + "children": [], + "url": "https://2023.antflix.net#408.18_(B)" + }, + { + "body": "Each section of equipment that requires rear or side access to make field connections shall be so marked by the manufacturer on the front. Section openings requiring rear or side access shall comply with 110.26. Load terminals for field wiring shall comply with 408.18(C)(1), (C)(2), or (C)(3) as applicable. [408.18_(C)](https://2023.antflix.net#408.18_(C))", + "displayTitle": "(C) Connections", + "children": [ + { + "body": "Load terminals for field wiring shall be so located that it is not necessary to reach across uninsulated ungrounded bus in order to make connections. [408.18_(C)_(1)](https://2023.antflix.net#408.18_(C)_(1))", + "displayTitle": "(1) Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#408.18_(C)_(1)" + }, + { + "body": "Where multiple branch or feeder grounded circuit conductor load terminals for field wiring are grouped together in one location, they shall be so located that it is not necessary to reach across uninsulated ungrounded bus, whether or not energized, in order to make connections. Where only one branch or feeder set of load terminals for field wiring are grouped with its associated ungrounded load terminals, they shall be so located that it is not necessary to reach across energized uninsulated bus including other branch or feeder bus in order to make connections. Bus on the line side of service, branch, or feeder disconnects is considered energized with respect to its associated load side circuits. [408.18_(C)_(2)](https://2023.antflix.net#408.18_(C)_(2))", + "displayTitle": "(2) Grounded Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#408.18_(C)_(2)" + }, + { + "body": "Load terminals for ungrounded conductors shall be so located that it is not necessary to reach across energized uninsulated bus in order to make connections. Bus on the line side of service, branch, or feeder disconnects is considered energized with respect to its associated load side circuits. [408.18_(C)_(3)](https://2023.antflix.net#408.18_(C)_(3))", + "displayTitle": "(3) Ungrounded Conductors", + "children": [], + "url": "https://2023.antflix.net#408.18_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#408.18_(C)" + } + ], + "url": "https://2023.antflix.net#408.18" + }, + { + "body": "An insulated conductor used within a switchboard or switchgear shall be listed, shall be flame retardant, and shall be rated not less than the voltage applied to it and not less than the voltage applied to other conductors or busbars with which it may come into contact. [408.19](https://2023.antflix.net#408.19)", + "displayTitle": "408.19 Conductor Insulation", + "children": [], + "url": "https://2023.antflix.net#408.19" + }, + { + "body": "Switchboards and switchgear that have any exposed live parts shall be located in permanently dry locations and then only where under competent supervision and accessible only to qualified persons. Switchboards and switchgear shall be located such that the probability of damage from equipment or processes is reduced to a minimum. [408.20](https://2023.antflix.net#408.20)", + "displayTitle": "408.20 Location of Switchboards and Switchgear", + "children": [], + "url": "https://2023.antflix.net#408.20" + }, + { + "body": "Instruments, relays, meters, and instrument transformers located on switchboards and switchgear shall be grounded as specified in 250.170 through 250.178. [408.22](https://2023.antflix.net#408.22)", + "displayTitle": "408.22 Grounding of Instruments, Relays, Meters, and Instrument Transformers on Switchboards and Switchgear", + "children": [], + "url": "https://2023.antflix.net#408.22" + }, + { + "body": "The requirements of 312.8(B) shall apply. [408.23](https://2023.antflix.net#408.23)", + "displayTitle": "408.23 Power Monitoring and Energy Management Equipment", + "children": [], + "url": "https://2023.antflix.net#408.23" + }, + { + "displayTitle": "Part III Panelboards", + "children": [], + "url": "https://2023.antflix.net#divider_50_III" + }, + { + "body": "All panelboards shall have a rating not less than the minimum feeder capacity required for the load calculated in accordance with Part III, IV, or V of Article 220, as applicable. [408.30](https://2023.antflix.net#408.30)", + "displayTitle": "408.30 General", + "children": [], + "url": "https://2023.antflix.net#408.30" + }, + { + "body": "In addition to the requirement of 408.30, a panelboard shall be protected by an overcurrent protective device having a rating not greater than that of the panelboard. This overcurrent protective device shall be located within or at any point on the supply side of the panelboard. Exception No. 1: Individual protection shall not be required for a panelboard protected by two main circuit breakers or two sets of fuses in other than service equipment, having a combined rating not greater than that of the panelboard. A panelboard constructed or wired under this exception shall not contain more than 42 overcurrent devices. For the purposes of determining the maximum of 42 overcurrent devices, a 2-pole or a 3-pole circuit breaker shall be considered as two or three overcurrent devices, respectively. Exception No. 2: For existing panelboards, individual protection shall not be required for a panelboard used as service equipment for an individual residential occupancy. [408.36](https://2023.antflix.net#408.36)", + "displayTitle": "408.36 Overcurrent Protection", + "children": [ + { + "body": "Panelboards equipped with snap switches rated at 30 amperes or less shall have overcurrent protection of 200 amperes or less. [408.36_(A)](https://2023.antflix.net#408.36_(A))", + "displayTitle": "(A) Snap Switches Rated at 30 Amperes or Less", + "children": [], + "url": "https://2023.antflix.net#408.36_(A)" + }, + { + "body": "Where a panelboard is supplied through a transformer, the overcurrent protection required by 408.36 shall be located on the secondary side of the transformer. Exception: A panelboard supplied by the secondary side of a transformer shall be considered as protected by the overcurrent protection provided on the primary side of the transformer where that protection is in accordance with 240.21(C)(1). [408.36_(B)](https://2023.antflix.net#408.36_(B))", + "displayTitle": "(B) Supplied Through a Transformer", + "children": [], + "url": "https://2023.antflix.net#408.36_(B)" + }, + { + "body": "A 3-phase disconnect or overcurrent device shall not be connected to the bus of any panelboard that has less than 3-phase buses. Delta breakers shall not be installed in panelboards. [408.36_(C)](https://2023.antflix.net#408.36_(C))", + "displayTitle": "(C) Delta Breakers", + "children": [], + "url": "https://2023.antflix.net#408.36_(C)" + }, + { + "body": "Plug-in-type overcurrent protection devices or plug-in type main lug assemblies that are backfed and used to terminate field-installed ungrounded supply conductors shall be secured in place by an additional fastener that requires other than a pull to release the device from the mounting means on the panelboard. [408.36_(D)](https://2023.antflix.net#408.36_(D))", + "displayTitle": "(D) Back-Fed Devices", + "children": [], + "url": "https://2023.antflix.net#408.36_(D)" + } + ], + "url": "https://2023.antflix.net#408.36" + }, + { + "body": "Panelboards in damp or wet locations shall be installed to comply with 312.2. [408.37](https://2023.antflix.net#408.37)", + "displayTitle": "408.37 Panelboards in Damp or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#408.37" + }, + { + "body": "Panelboards shall be mounted in cabinets, cutout boxes, or identified enclosures and shall be dead-front. Where the available fault current is greater than 10,000 amperes, the panelboard and enclosure combination shall be evaluated for the application. Exception: Panelboards other than of the dead-front, externally operable type shall be permitted where accessible only to qualified persons. [408.38](https://2023.antflix.net#408.38)", + "displayTitle": "408.38 Enclosure", + "children": [], + "url": "https://2023.antflix.net#408.38" + }, + { + "body": "In panelboards, fuses of any type shall be installed on the load side of any switches. Exception: Fuses installed as part of service equipment in accordance with the provisions of 230.94 shall be permitted on the line side of the service switch. [408.39](https://2023.antflix.net#408.39)", + "displayTitle": "408.39 Relative Arrangement of Switches and Fuses", + "children": [], + "url": "https://2023.antflix.net#408.39" + }, + { + "body": "Panelboard cabinets and panelboard frames, if of metal, shall be in physical contact with each other and shall be connected to an equipment grounding conductor. Where the panelboard is used with nonmetallic raceway or cable or where separate equipment grounding conductors are provided, a terminal bar for the equipment grounding conductors shall be secured inside the cabinet. The terminal bar shall be bonded to the cabinet and panelboard frame, if of metal; otherwise it shall be connected to the equipment grounding conductor that is run with the conductors feeding the panelboard. Exception: Where an isolated equipment grounding conductor for a branch circuit or a feeder is provided as permitted by 250.146(D), the insulated equipment grounding conductor that is run with the circuit conductors shall be permitted to pass through the panelboard without being connected to the panelboard's equipment grounding terminal bar. Equipment grounding conductors shall not be connected to a terminal bar provided for grounded conductors or neutral conductors unless the bar is identified for the purpose and is located where interconnection between equipment grounding conductors and grounded circuit conductors is permitted or required by Part II and Part VII of Article 250. [408.40](https://2023.antflix.net#408.40)", + "displayTitle": "408.40 Grounding of Panelboards", + "children": [], + "url": "https://2023.antflix.net#408.40" + }, + { + "body": "Each grounded conductor shall terminate within the panelboard in an individual terminal that is not also used for another conductor. Exception: Grounded conductors of circuits with parallel conductors shall be permitted to terminate in a single terminal if the terminal is identified for connection of more than one conductor. [408.41](https://2023.antflix.net#408.41)", + "displayTitle": "408.41 Grounded Conductor Terminations", + "children": [], + "url": "https://2023.antflix.net#408.41" + }, + { + "body": "Panelboards shall not be installed in the face-up or face-down position. [408.43](https://2023.antflix.net#408.43)", + "displayTitle": "408.43 Panelboard Orientation", + "children": [], + "url": "https://2023.antflix.net#408.43" + }, + { + "displayTitle": "Part IV Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_10_IV" + }, + { + "body": "The panels of switchboards and switchgear shall be made of moisture-resistant, noncombustible material. [408.50](https://2023.antflix.net#408.50)", + "displayTitle": "408.50 Panels", + "children": [], + "url": "https://2023.antflix.net#408.50" + }, + { + "body": "Insulated or bare busbars shall be rigidly mounted. [408.51](https://2023.antflix.net#408.51)", + "displayTitle": "408.51 Busbars", + "children": [], + "url": "https://2023.antflix.net#408.51" + }, + { + "body": "Instruments, pilot lights, voltage (potential) transformers, and other switchboard or switchgear devices with potential coils shall be supplied by a circuit that is protected by standard overcurrent devices rated 15 amperes or less. Exception No. 1: Overcurrent devices rated more than 15 amperes shall be permitted where the interruption of the circuit could create a hazard. Short-circuit protection shall be provided. Exception No. 2: For ratings of 2 amperes or less, special types of enclosed fuses shall be permitted. [408.52](https://2023.antflix.net#408.52)", + "displayTitle": "408.52 Protection of Instrument Circuits", + "children": [], + "url": "https://2023.antflix.net#408.52" + }, + { + "body": "A panelboard shall be provided with physical means to prevent the installation of more overcurrent devices than that number for which the panelboard was designed, rated, and listed. For the purposes of this section, a 2-pole circuit breaker or fusible switch shall be considered two overcurrent devices; a 3-pole circuit breaker or fusible switch shall be considered three overcurrent devices. [408.54](https://2023.antflix.net#408.54)", + "displayTitle": "408.54 Maximum Number of Overcurrent Devices", + "children": [], + "url": "https://2023.antflix.net#408.54" + }, + { + "displayTitle": "408.55 Wire-Bending Space Within an Enclosure Containing a Panelboard", + "children": [ + { + "body": "The enclosure for a panelboard shall have the top and bottom wire-bending space sized in accordance with Table 312.6(B)(2) for the largest conductor entering or leaving the enclosure. Exception No. 1: Either the top or bottom wire-bending space shall be permitted to be sized in accordance with Table 312.6(A) for a panelboard rated 225 amperes or less and designed to contain not over 42 overcurrent devices. For the purposes of this exception, a 2-pole or a 3-pole circuit breaker shall be considered as two or three overcurrent devices, respectively. Exception No. 2: Either the top or bottom wire-bending space for any panelboard shall be permitted to be sized in accordance with Table 312.6(A) where at least one side wire-bending space is sized in accordance with Table 312.6(B)(2) for the largest conductor to be terminated in any side wire-bending Space. Exception No. 3: The top and bottom wire-bending space shall be permitted to be sized in accordance with Table 312.6(A) spacings if the panelboard is designed and constructed for wiring using only a single 90-degree bend for each conductor, including the grounded circuit conductor, and the wiring diagram shows and specifies the method of wiring that shall be used. Exception No. 4: Either the lop or the bottom wire-bending space, but not both, shall be permitted to be sized in accordance with Table 312.6(A) where there are no conductors terminated in that space. [408.55_(A)](https://2023.antflix.net#408.55_(A))", + "displayTitle": "(A) Top and Bottom Wire-Bending Space", + "children": [], + "url": "https://2023.antflix.net#408.55_(A)" + }, + { + "body": "Side wire-bending space shall be in accordance with Table 312.6(A) for the largest conductor to be terminated in that space. [408.55_(B)](https://2023.antflix.net#408.55_(B))", + "displayTitle": "(B) Side Wire-Bending Space", + "children": [], + "url": "https://2023.antflix.net#408.55_(B)" + }, + { + "body": "Where a raceway or cable entry is in the wall of the enclosure opposite a removable cover, the distance from that wall to the cover shall be permitted to comply with (he distance required for one wire per terminal in Table 312.6(A). The distance between the center of the rear entry and the nearest termination for the entering conductors shall not be less than the distance given in Table 312.6(B)(2). [408.55_(C)](https://2023.antflix.net#408.55_(C))", + "displayTitle": "(C) Back Wire-Bending Space", + "children": [], + "url": "https://2023.antflix.net#408.55_(C)" + } + ], + "url": "https://2023.antflix.net#408.55" + }, + { + "body": "The distance between uninsulated metal parts, busbars, and other uninsulated live parts shall not be less than specified in Table 408.56.\nWhere close proximity does not cause excessive heating, parts of the same polarity at switches, enclosed fuses, and so forth shall be permitted to be placed as close together as convenience in handling will allow.\nException: The distance shall be permitted to be less than that specified in Table. 408.56 at circuit breakers and switches and in listed components installed in switchboards, switchgear, and panelboards.\nTable 408.56 Minimum Spacings Between Bare Metal Parts\n\n\n\nAC or DC Voltage\nOpposite Polarity Where Mounted on the Same Surface\nOpposite Polarity Where Held Free in Air\nLive Parts to Ground*\n\n\nmm\nin.\nmm\nin.\nmm\nin.\n\n\n\n\nNot over 125 volts, nominal\n19.1\n3/4\n12.7\n1/2\n12.7\n1/2\n\n\nNot over 250 volts, nominal\n31.8\n11/4\n19.1\n3/4\n12.7\n1/2\n\n\nNot over 1000 volts, nominal\n50.8\n2\n25.4\n1\n25.4\n1\n\n\n\n*For spacing between live parts and doors of cabinets, the dimensions in 312.101(A) shall apply. [408.56](https://2023.antflix.net#408.56)", + "displayTitle": "408.56 Minimum Spacings", + "children": [], + "url": "https://2023.antflix.net#408.56" + }, + { + "body": "Panelboards shall be durably marked by the manufacturer with the voltage and the current rating and the number of ac phases or dc buses for which they are designed and with the manufacturer's name or trademark in such a manner so as to be visible after installation, without disturbing the interior parts or wiring. [408.58](https://2023.antflix.net#408.58)", + "displayTitle": "408.58 Panelboard Marking", + "children": [], + "url": "https://2023.antflix.net#408.58" + } + ], + "url": "https://2023.antflix.net#408" + }, + { + "displayTitle": "Article 409 Industrial Control Panels", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_59_I" + }, + { + "body": "This article covers industrial control panels intended for general use and operating at 1000 volts or less. Informational Note: See ANSI/UI. 508A, Standard for Industrial Control Panels, a safety standard for industrial control panels. [409.1](https://2023.antflix.net#409.1)", + "displayTitle": "409.1 Scope", + "children": [], + "url": "https://2023.antflix.net#409.1" + }, + { + "body": "In addition to the requirements of this article, industrial control panels that contain branch circuits for specific loads or components, or are for control of specific types of equipment addressed in other articles of this Code, shall be constructed and installed in accordance with the applicable requirements from those articles. [409.3](https://2023.antflix.net#409.3)", + "displayTitle": "409.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#409.3" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_59_II" + }, + { + "body": "The size of the industrial control panel supply conductor shall have an ampacity not less than 125 percent of the full-load current rating of all heating loads plus 125 percent of the full-load current rating of the highest rated motor plus the sum of the full-load current ratings of all other connected motors and apparatus based on their duty cycle that may be in operation at the same time. [409.20](https://2023.antflix.net#409.20)", + "displayTitle": "409.20 Conductor - Minimum Size and Ampacity", + "children": [], + "url": "https://2023.antflix.net#409.20" + }, + { + "displayTitle": "409.21 Overcurrent Protection", + "children": [ + { + "body": "Industrial control panels shall be provided with overcurrent protection in accordance with Parts I and II of Article 240. [409.21_(A)](https://2023.antflix.net#409.21_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#409.21_(A)" + }, + { + "body": "This protection shall be provided for each incoming supply circuit by either of the following: An overcurrent protective device located ahead of the industrial control panel.A single main overcurrent protective device located within the industrial control panel. Where overcurrent protection is provided as part of the industrial control panel, the supply conductors shall be considered as either feeders or taps as covered by 240.21. [409.21_(B)](https://2023.antflix.net#409.21_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#409.21_(B)" + }, + { + "body": "The rating or setting of the overcurrent protective device for the circuit supplying the industrial control panel shall not be greater than the sum of the largest rating or setting of the branch-circuit short-circuit and ground-fault protective device provided with the industrial control panel, plus 125 percent of the full-load current rating of all resistance heating loads, plus the sum of the full-load currents of all other motors and apparatus that could be in operation at the same time. Exception: Where one or more instantaneous trip circuit breakers or motor short-circuit protectors are used for motor branch-circuit short-circuit and ground-fault protection as permitted by 430.52(C), the procedure specified above for determining the maximum rating of the protective device for the circuit supplying the industrial control panel shall apply with the following provision: For the purpose of the calculation, each instantaneous trip circuit breaker or motor short-circuit protector shall be assumed to have a rating not exceeding the maximum percentage of motor full-load current permitted by Table 430.52(C)(1) for the type of control panel supply circuit protective device employed. Where no branch-circuit short-circuit and ground-fault protective device is provided with the industrial control panel for motor or combination of motor and non-motor loads, the rating or setting of the overcurrent protective device shall be based on 430.52 and 430.53, as applicable. [409.21_(C)](https://2023.antflix.net#409.21_(C))", + "displayTitle": "(C) Rating", + "children": [], + "url": "https://2023.antflix.net#409.21_(C)" + } + ], + "url": "https://2023.antflix.net#409.21" + }, + { + "displayTitle": "409.22 Short-Circuit Current Rating", + "children": [ + { + "body": "An industrial control panel shall not be installed where the available fault current exceeds its short-circuit current rating as marked in accordance with 409.110(4). [409.22_(A)](https://2023.antflix.net#409.22_(A))", + "displayTitle": "(A) Installation", + "children": [], + "url": "https://2023.antflix.net#409.22_(A)" + }, + { + "body": "If an industrial control panel is required to be marked with a short-circuit current rating in accordance with 409.110(4), the available fault current at the industrial control panel and the date the available fault current calculation was performed shall be documented and made available to those authorized to inspect, install, or maintain the installation. [409.22_(B)](https://2023.antflix.net#409.22_(B))", + "displayTitle": "(B) Documentation", + "children": [], + "url": "https://2023.antflix.net#409.22_(B)" + } + ], + "url": "https://2023.antflix.net#409.22" + }, + { + "body": "Disconnecting means that supply motor loads shall comply with Part IX of Article 430. [409.30](https://2023.antflix.net#409.30)", + "displayTitle": "409.30 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#409.30" + }, + { + "body": "Industrial control panels shall be grounded and bonded in accordance with 409.60(A) and (B). [409.60](https://2023.antflix.net#409.60)", + "displayTitle": "409.60 Bonding", + "children": [ + { + "body": "An equipment grounding conductor sized in accordance with 250.122 shall be connected to an equipment grounding bus or to an equipment grounding termination point provided in a single-section industrial control panel. [409.60_(A)](https://2023.antflix.net#409.60_(A))", + "displayTitle": "(A) Grounding", + "children": [], + "url": "https://2023.antflix.net#409.60_(A)" + }, + { + "body": "Multisection industrial control panels shall be bonded together using an equipment bonding jumper sized in accordance with 250.102(D). [409.60_(B)](https://2023.antflix.net#409.60_(B))", + "displayTitle": "(B) Bonding", + "children": [], + "url": "https://2023.antflix.net#409.60_(B)" + } + ], + "url": "https://2023.antflix.net#409.60" + }, + { + "body": "Safety circuits for personnel protection that are subject to damage from surge events shall have surge protection installed within or immediately adjacent to the control panel. [409.70](https://2023.antflix.net#409.70)", + "displayTitle": "409.70 Surge Protection", + "children": [], + "url": "https://2023.antflix.net#409.70" + }, + { + "displayTitle": "Part III Construction Specifications", + "children": [], + "url": "https://2023.antflix.net#divider_51_III" + }, + { + "body": "Table 110.28 shall be used as the basis for selecting industrial control panel enclosures for use in specific locations other than hazardous (classified) locations. The enclosures are not intended to protect against conditions such as condensation, icing, corrosion, or contamination that may occur within the enclosure or enter via the conduit or unsealed openings. [409.100](https://2023.antflix.net#409.100)", + "displayTitle": "409.100 Enclosures", + "children": [], + "url": "https://2023.antflix.net#409.100" + }, + { + "body": "Industrial control panels utilizing busbars shall comply with 409.102(A) and (B). [409.102](https://2023.antflix.net#409.102)", + "displayTitle": "409.102 Busbars", + "children": [ + { + "body": "Busbars shall be protected from physical damage and be held firmly in place. [409.102_(A)](https://2023.antflix.net#409.102_(A))", + "displayTitle": "(A) Support and Arrangement", + "children": [], + "url": "https://2023.antflix.net#409.102_(A)" + }, + { + "body": "The phase arrangement on 3-phase horizontal common power and vertical buses shall be A, B, C from front to back, top to bottom, or left to right, as viewed from the front of the industrial control panel. The B phase shall be that phase having the higher voltage to ground on 3-phase, 4-wire, delta-connected systems. Other busbar arrangements shall be permitted for additions to existing installations, and the phases shall be permanently marked. [409.102_(B)](https://2023.antflix.net#409.102_(B))", + "displayTitle": "(B) Phase Arrangement", + "children": [], + "url": "https://2023.antflix.net#409.102_(B)" + } + ], + "url": "https://2023.antflix.net#409.102" + }, + { + "displayTitle": "409.104 Wiring Space", + "children": [ + { + "body": "Industrial control panel enclosures shall not be used as junction boxes, auxiliary gutters, or raceways for conductors feeding through or tapping off to other switches or overcurrent devices or other equipment, unless the conductors fill less than 40 percent of the cross-sectional area of the wiring space. In addition, the conductors, splices, and taps shall not fill the wiring space at any cross section to more than 75 percent of the cross-sectional area of that space. [409.104_(A)](https://2023.antflix.net#409.104_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#409.104_(A)" + }, + { + "body": "Wire bending space within industrial control panels for field wiring terminals shall be in accordance with the requirements in 430.10(B). [409.104_(B)](https://2023.antflix.net#409.104_(B))", + "displayTitle": "(B) Wire Bending Space", + "children": [], + "url": "https://2023.antflix.net#409.104_(B)" + } + ], + "url": "https://2023.antflix.net#409.104" + }, + { + "body": "Spacings in feeder circuits between uninsulated live parts of adjacent components, between uninsulated live parts of components and grounded or accessible noncurrent-carrying metal parts, between uninsulated live parts of components and the enclosure, and at field wiring terminals shall be as shown in Table 430.97(D). Exception: Spacings shall be permitted to be less than those specified in Table 430.97(D) at circuit breakers and switches and in listed components installed in industrial control panels. [409.106](https://2023.antflix.net#409.106)", + "displayTitle": "409.106 Spacings", + "children": [], + "url": "https://2023.antflix.net#409.106" + }, + { + "body": "Where used as service equipment, each industrial control panel shall be of the type that is suitable for use as service equipment. Where a grounded conductor is provided, the industrial control panel shall be provided with a main bonding jumper, sized in accordance with 250.28(D), for connecting the grounded conductor, on its supply side, to the industrial control panel equipment ground bus or equipment ground terminal. [409.108](https://2023.antflix.net#409.108)", + "displayTitle": "409.108 Service Equipment", + "children": [], + "url": "https://2023.antflix.net#409.108" + }, + { + "body": "An industrial control panel shall have permanent markings that are visible after installation. The markings in 409.110(2) and (3) shall be attached to the outside of the enclosure. The markings in 409.110(1), (4), (5), (6), and (7) shall be attached to either the inside or outside of the enclosure. The following markings shall be included: Manufacturer's name, trademark, or other descriptive marking by which the organization responsible for the product can be identified.Supply voltage, number of phases, frequency, and full-load current for each incoming supply circuit.Where the industrial control panel is supplied by more than one electrical source and where more than one disconnecting means is required to disconnect all circuits 50-volts or more within the control panel, marked to indicate that more than one disconnecting means is required to de-energize the equipment. The location of the means necessary to disconnect all circuits 50-volts or more shall be documented and available.Short-circuit current rating of the industrial control panel based on one of the following:Short-circuit current rating of a listed and labeled assemblyShort-circuit current rating established utilizing an approved methodInformational Note: See ANSI/UL 508A, Standard for Industrial Control Panels, Supplement SB, for an example of an approved method.Exception to (4): Short-circuit current rating markings are not required for industrial control panels containing only control circuit components.If the industrial control panel is intended as service equipment, marked to identify it as being suitable for use as service equipment.Electrical wiring diagram, the identification number of a separate electrical wiring diagram, or a designation referenced in a separate wiring diagram.An enclosure type number. [409.110](https://2023.antflix.net#409.110)", + "displayTitle": "409.110 Marking", + "children": [], + "url": "https://2023.antflix.net#409.110" + } + ], + "url": "https://2023.antflix.net#409" + }, + { + "displayTitle": "Article 410 Luminaires, Lampholders, and Lamps", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_60_I" + }, + { + "body": "This article covers luminaires, portable luminaires, lampholders, pendants, incandescent filament lamps, arc lamps, electric-discharge lamps, decorative lighting products, lighting accessories for temporary seasonal and holiday use, portable flexible lighting products, and the wiring and equipment forming part of such products and lighting installations. [410.1](https://2023.antflix.net#410.1)", + "displayTitle": "410.1 Scope", + "children": [], + "url": "https://2023.antflix.net#410.1" + }, + { + "body": "Reconditioned luminaires, lampholders, ballasts, LED drivers, lamps, and retrofit kits shall not be permitted. If a retrofit kit is installed in a luminaire in accordance with the installation instructions, the retrofitted luminaire shall not be considered reconditioned. [410.2](https://2023.antflix.net#410.2)", + "displayTitle": "410.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#410.2" + }, + { + "body": "Luminaires, portable luminaires, lampholders, and lamps shall have no live parts normally exposed to contact. Exposed accessible terminals in lampholders and switches shall not be installed in metal luminaire canopies or in open bases of portable table or floor luminaires. Exception: Cleat-type lampholders located at least 2.5 m (8 ft) above the floor shall be permitted to have exposed terminals. [410.5](https://2023.antflix.net#410.5)", + "displayTitle": "410.5 Live Parts", + "children": [], + "url": "https://2023.antflix.net#410.5" + }, + { + "body": "All luminaires, lampholders, and retrofit kits shall be listed. [410.6](https://2023.antflix.net#410.6)", + "displayTitle": "410.6 Listing Required", + "children": [], + "url": "https://2023.antflix.net#410.6" + }, + { + "body": "Luminaires shall be installed such that the connections between the luminaire conductors and the circuit conductors can be inspected without requiring the disconnection of any part of the wiring unless the luminaires are connected by attachment plugs and receptacles. [410.8](https://2023.antflix.net#410.8)", + "displayTitle": "410.8 Inspection", + "children": [], + "url": "https://2023.antflix.net#410.8" + }, + { + "displayTitle": "Part II Luminaire Locations", + "children": [], + "url": "https://2023.antflix.net#divider_60_II" + }, + { + "displayTitle": "410.10 Luminaires in Specific Locations", + "children": [ + { + "body": "Luminaires installed in wet or damp locations shall be installed such that water cannot enter or accumulate in wiring compartments, lampholders, or other electrical parts. All luminaires installed in wet locations shall be marked as suitable for wet locations. All luminaires installed in damp locations shall be marked as suitable for wet locations or suitable for damp locations. [410.10_(A)](https://2023.antflix.net#410.10_(A))", + "displayTitle": "(A) Wet and Damp Locations", + "children": [], + "url": "https://2023.antflix.net#410.10_(A)" + }, + { + "body": "Luminaires installed in corrosive locations shall be of a type suitable for such locations. [410.10_(B)](https://2023.antflix.net#410.10_(B))", + "displayTitle": "(B) Corrosive Locations", + "children": [], + "url": "https://2023.antflix.net#410.10_(B)" + }, + { + "body": "Luminaires shall be permitted to be installed in commercial cooking hoods where all of the following conditions are met: The luminaire shall be identified for use within commercial cooking hoods and installed such that the temperature limits of the materials used are not exceeded.The luminaire shall be constructed so that all exhaust vapors, grease, oil, or cooking vapors are excluded from the lamp and wiring compartment. Diffusers shall be resistant to thermal shock.Parts of the luminaire exposed within the hood shall be corrosion resistant or protected against corrosion, and the surface shall be smooth so as not to collect deposits and to facilitate cleaning.Wiring methods and materials supplying the luminaire(s) shall not be exposed within the cooking hood.Informational Note: See 110.11 for conductors and equipment exposed to deteriorating agents. [410.10_(C)](https://2023.antflix.net#410.10_(C))", + "displayTitle": "(C) In Ducts or Hoods", + "children": [], + "url": "https://2023.antflix.net#410.10_(C)" + }, + { + "body": "A luminaire installed in a bathtub or shower area shall meet all of the following requirements: No parts of cord-connected luminaires, chain-, cable-, or cord-suspended luminaires, lighting track, pendants, or ceiling-suspended (paddle) fans with luminaire (light kit) shall be located within a zone measured 900 mm (3 ft) horizontally and 2.5 m (8 ft) vertically from the top of the bathtub rim or shower stall threshold. This zone is all-encompassing and includes the space directly over the tub or shower stall.Luminaires located within the actual outside dimension of the bathtub or shower to a height of 2.5 m (8 ft) vertically from the top of the bathtub rim or shower threshold shall be marked suitable for damp locations or marked suitable for wet locations. Luminaires located where subject to shower spray shall be marked suitable for wet locations. [410.10_(D)](https://2023.antflix.net#410.10_(D))", + "displayTitle": "(D) Bathtub and Shower Areas", + "children": [], + "url": "https://2023.antflix.net#410.10_(D)" + }, + { + "body": "Luminaires subject to physical damage, using a mercury vapor or metal halide lamp, installed in playing and spectator seating areas of indoor sports, mixed-use, or all-purpose facilities shall be of the type that protects the lamp with a glass or plastic lens. Such luminaires shall be permitted to have an additional guard. [410.10_(E)](https://2023.antflix.net#410.10_(E))", + "displayTitle": "(E) Luminaires in Indoor Sports, Mixed-Use, and All-Purpose Facilities", + "children": [], + "url": "https://2023.antflix.net#410.10_(E)" + }, + { + "body": "Luminaires installed in exposed or concealed locations under roof decking where subject to physical damage shall be installed and supported so there is not less than 38 mm (11/2 in.) measured from the lowest surface of the roof decking to the top of the luminaire. Exception: The 38 mm (11/2 in.) spacing is not required where metal-corrugated sheet roof decking is covered with a minimum thickness 50 mm (2 in.) concrete slab, measured from the top of the corrugated roofing. [410.10_(F)](https://2023.antflix.net#410.10_(F))", + "displayTitle": "(F) Luminaires Installed in or Under Roof Decking", + "children": [], + "url": "https://2023.antflix.net#410.10_(F)" + } + ], + "url": "https://2023.antflix.net#410.10" + }, + { + "body": "Luminaires shall be constructed, installed, or equipped with shades or guards so that combustible material is not subjected to temperatures in excess of 90\u00b0C (194\u00b0F). [410.11](https://2023.antflix.net#410.11)", + "displayTitle": "410.11 Luminaires Near Combustible Material", + "children": [], + "url": "https://2023.antflix.net#410.11" + }, + { + "body": "Lampholders installed over highly combustible material shall be of the unswitched type. Unless an individual switch is provided for each luminaire, lampholders shall be located at least 2.5 m (8 ft) above the floor or shall be located or guarded so that the lamps cannot be readily removed or damaged. [410.12](https://2023.antflix.net#410.12)", + "displayTitle": "410.12 Luminaires Over Combustible Material", + "children": [], + "url": "https://2023.antflix.net#410.12" + }, + { + "body": "Chain-supported luminaires used in a show window shall be permitted to be externally wired. No other externally wired luminaires shall be used. [410.14](https://2023.antflix.net#410.14)", + "displayTitle": "410.14 Luminaires in Show Windows", + "children": [], + "url": "https://2023.antflix.net#410.14" + }, + { + "displayTitle": "410.16 Luminaires in Clothes Closets", + "children": [ + { + "body": "The clothes closet storage space shall be the volume bounded by the sides and back closet walls and planes extending from the closet floor vertically to a height of 1.8 m (6 ft) or to the highest clothes-hanging rod and parallel to the walls at a horizontal distance of 600 mm (24 in.) from the sides and back of the closet walls, respectively. The volume extends vertically to the closet ceiling parallel to the walls at a horizontal distance of 300 mm (12 in.) or the width of the shelf, whichever is greater. For a closet that permits access to both sides of a hanging rod, the clothes closet storage space includes the volume below the highest rod extending 300 mm (12 in.) on either side of the rod on a plane horizontal to the floor extending the entire length of the rod. See Figure 410.16(A). FIGURE 410.16(A) Clothes Closet Storage Space. [410.16_(A)](https://2023.antflix.net#410.16_(A))", + "displayTitle": "(A) Clothes Closet Storage Space", + "children": [], + "url": "https://2023.antflix.net#410.16_(A)" + }, + { + "body": "Only luminaires of the following types shall be permitted in a clothes closet: Surface-mounted or recessed incandescent or LED luminaires with completely enclosed light sourcesSurface-mounted or recessed fluorescent luminairesSurface-mounted fluorescent or LED luminaires identified as suitable for installation within the clothes closet storage space [410.16_(B)](https://2023.antflix.net#410.16_(B))", + "displayTitle": "(B) Luminaire Types Permitted", + "children": [], + "url": "https://2023.antflix.net#410.16_(B)" + }, + { + "body": "Incandescent luminaires with open or partially enclosed lamps and pendant luminaires or lampholders shall not be permitted. [410.16_(C)](https://2023.antflix.net#410.16_(C))", + "displayTitle": "(C) Luminaire Types Not Permitted", + "children": [], + "url": "https://2023.antflix.net#410.16_(C)" + }, + { + "body": "The minimum clearance between luminaires installed in clothes closets and the nearest point of a clothes closet storage space shall be as follows: 300 mm (12 in.) for surface-mounted incandescent or LED luminaires with a completely enclosed light source installed on the wall above the door or on the ceiling.150 mm (6 in.) for surface-mounted fluorescent luminaires installed on the wall above the door or on the ceiling.150 mm (6 in.) for recessed incandescent or LED luminaires with a completely enclosed light source installed in the wall or the ceiling.150 mm (6 in.) for recessed fluorescent luminaires installed in the wall or the ceiling.Exception: Surface-mounted fluorescent or LED luminaires shall be permitted to be installed within the clothes closet storage space where identified for this use. [410.16_(D)](https://2023.antflix.net#410.16_(D))", + "displayTitle": "(D) Location", + "children": [], + "url": "https://2023.antflix.net#410.16_(D)" + } + ], + "url": "https://2023.antflix.net#410.16" + }, + { + "body": "Coves shall have adequate space and shall be located so that lamps and equipment can be properly installed and maintained. [410.18](https://2023.antflix.net#410.18)", + "displayTitle": "410.18 Space for Cove Lighting", + "children": [], + "url": "https://2023.antflix.net#410.18" + }, + { + "displayTitle": "Part III Luminaire Outlet Boxes, Canopies, and Pans", + "children": [], + "url": "https://2023.antflix.net#divider_52_III" + }, + { + "body": "Canopies and outlet boxes taken together shall provide sufficient space so that luminaire conductors and their connecting devices are capable of being installed in accordance with 314.16. [410.20](https://2023.antflix.net#410.20)", + "displayTitle": "410.20 Space for Conductors", + "children": [], + "url": "https://2023.antflix.net#410.20" + }, + { + "body": "Luminaires shall be of such construction or installed so that the conductors in outlet boxes shall not be subjected to temperatures greater than that for which the conductors are rated. Branch-circuit wiring, other than 2-wire or multiwire branch circuits supplying power to luminaires connected together, shall not be passed through an outlet box that is an integral part of a luminaire unless the luminaire is identified for through-wiring. Informational Note: See 410.64(C) for wiring supplying power to luminaires connected together. [410.21](https://2023.antflix.net#410.21)", + "displayTitle": "410.21 Temperature Limit of Conductors in Outlet Boxes", + "children": [], + "url": "https://2023.antflix.net#410.21" + }, + { + "body": "In a completed installation, each outlet box shall be provided with a cover unless covered by means of a luminaire canopy, lampholder, receptacle that covers the box or is provided with a faceplate, or similar device. [410.22](https://2023.antflix.net#410.22)", + "displayTitle": "410.22 Outlet Boxes to Be Covered", + "children": [], + "url": "https://2023.antflix.net#410.22" + }, + { + "body": "Any combustible wall or ceiling finish exposed between the edge of a luminaire canopy or pan and an outlet box having a surface area of 1160 mm2 (180 in.2) or more shall be covered with noncombustible material. [410.23](https://2023.antflix.net#410.23)", + "displayTitle": "410.23 Covering of Combustible Material at Outlet Boxes", + "children": [], + "url": "https://2023.antflix.net#410.23" + }, + { + "displayTitle": "410.24 Connection of Electric-Discharge and LED Luminaires", + "children": [ + { + "body": "Electric-discharge and LED luminaires supported independently of the outlet box shall be connected to the branch circuit through metal race-way, nonmetallic raceway, Type MC cable, Type AC cable, Type MI cable, nonmetallic sheathed cable, or by flexible cord as permitted in 410.62(B) or 410.62(C). [410.24_(A)](https://2023.antflix.net#410.24_(A))", + "displayTitle": "(A) Independent of the Outlet Box", + "children": [], + "url": "https://2023.antflix.net#410.24_(A)" + }, + { + "body": "Electric-discharge and LED luminaires surface mounted over concealed outlet, pull, or junction boxes and designed not to be supported solely by the outlet box shall be provided with suitable openings in the back of the luminaire to provide access to the wiring in the box. [410.24_(B)](https://2023.antflix.net#410.24_(B))", + "displayTitle": "(B) Access to Boxes", + "children": [], + "url": "https://2023.antflix.net#410.24_(B)" + } + ], + "url": "https://2023.antflix.net#410.24" + }, + { + "displayTitle": "Part IV Luminaire Supports", + "children": [], + "url": "https://2023.antflix.net#divider_11_IV" + }, + { + "displayTitle": "410.30 Supports", + "children": [ + { + "body": "Luminaires and lampholders shall be securely supported. A luminaire that weighs more than 3 kg (6 lb) or exceeds 400 mm (16 in.) in any dimension shall not be supported by the screw shell of a lampholder. [410.30_(A)](https://2023.antflix.net#410.30_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#410.30_(A)" + }, + { + "body": "Metal or nonmetallic poles shall be permitted to be used to support luminaires and as a raceway to enclose supply conductors, provided the following conditions are met: A pole shall have a handhole not less than 50 mm x 100 mm (2 in. x 4 in.) with a cover suitable for use in wet locations to provide access to the supply terminations within the pole or pole base.Exception No. 1: No handhole shall be required in a pole 2.5 m (8 ft) or less in height abovegrade where the supply wiring method continues without splice or pull point, and where the interior of the pole and any splices are accessible by removing the luminaire.Exception No. 2: No handhole shall be required in a pole 6.0 m (20 ft) or less in height abovegrade that is provided with a hinged base.Where raceway risers or cable is not installed within the pole, a threaded fitting or nipple shall be brazed, welded, or attached to the pole opposite the handhole for the supply connection.A metal pole shall be provided with an equipment grounding terminal as follows:A pole with a handhole shall have the equipment grounding terminal accessible from the handhole.A pole with a hinged base shall have the equipment grounding terminal accessible within the base.Exception to (3): No grounding terminal shall be required in a pole 2.5 m (8 ft) or less in height abovegrade where the supply wiring method continues without splice or pull, and where the interior of the pole and any splices are accessible by removing the luminaire.A metal pole with a hinged base shall have the hinged base and pole bonded together.Metal raceways or other equipment grounding conductors shall be bonded to the metal pole with an equipment grounding conductor recognized by 250.118 and sized in accordance with 250.122.Conductors in vertical poles used as raceway shall be supported as provided in 300.19. [410.30_(B)](https://2023.antflix.net#410.30_(B))", + "displayTitle": "(B) Metal or Nonmetallic Poles Supporting Luminaires", + "children": [], + "url": "https://2023.antflix.net#410.30_(B)" + } + ], + "url": "https://2023.antflix.net#410.30" + }, + { + "displayTitle": "410.36 Means of Support", + "children": [ + { + "body": "Luminaires shall be permitted to be supported by outlet boxes or fittings installed as required by 314.23. The installation shall comply with the following requirements: The outlet boxes or fittings shall comply with 314.27(A)(1) and 314.27(A)(2).Luminaires shall be permitted to be supported in accordance with 314.27(E).Outlet boxes complying with 314.27(E) shall be considered lighting outlets as required by 210.70(A), (B), and (C). [410.36_(A)](https://2023.antflix.net#410.36_(A))", + "displayTitle": "(A) Luminaires Supported by Outlet Boxes", + "children": [], + "url": "https://2023.antflix.net#410.36_(A)" + }, + { + "body": "Framing members of suspended ceiling systems used to support luminaires shall be securely fastened to each other and shall be securely attached to the building structure at appropriate intervals. Luminaires shall be securely fastened to the ceiling framing member by mechanical means such as bolts, screws, or rivets. Listed clips identified for use with the type of ceiling framing member(s) and luminaire(s) shall also be permitted. [410.36_(B)](https://2023.antflix.net#410.36_(B))", + "displayTitle": "(B) Suspended Ceilings", + "children": [], + "url": "https://2023.antflix.net#410.36_(B)" + }, + { + "body": "Luminaire studs that are not a part of outlet boxes, hickeys, tripods, and crowfeet shall be made of steel, malleable iron, or other material suitable for the application. [410.36_(C)](https://2023.antflix.net#410.36_(C))", + "displayTitle": "(C) Luminaire Studs", + "children": [], + "url": "https://2023.antflix.net#410.36_(C)" + }, + { + "body": "Insulating joints that are not designed to be mounted with screws or bolts shall have an exterior metal casing, insulated from both screw connections. [410.36_(D)](https://2023.antflix.net#410.36_(D))", + "displayTitle": "(D) Insulating Joints", + "children": [], + "url": "https://2023.antflix.net#410.36_(D)" + }, + { + "body": "Raceway fittings used to support a luminaire(s) shall be capable of supporting the weight of the complete fixture assembly and lamp(s). [410.36_(E)](https://2023.antflix.net#410.36_(E))", + "displayTitle": "(E) Raceway Fittings", + "children": [], + "url": "https://2023.antflix.net#410.36_(E)" + }, + { + "body": "Luminaires shall be permitted to be connected to busways in accordance with 368.17(C). [410.36_(F)](https://2023.antflix.net#410.36_(F))", + "displayTitle": "(F) Busways", + "children": [], + "url": "https://2023.antflix.net#410.36_(F)" + }, + { + "body": "Outdoor luminaires and associated equipment shall be permitted to be supported by trees. Informational Note No. 1: See 225.26 for restrictions for support of overhead conductors. Informational Note No. 2: See 300.5(D) for protection of conductors. [410.36_(G)](https://2023.antflix.net#410.36_(G))", + "displayTitle": "(G) Trees", + "children": [], + "url": "https://2023.antflix.net#410.36_(G)" + } + ], + "url": "https://2023.antflix.net#410.36" + }, + { + "displayTitle": "Part V Grounding", + "children": [], + "url": "https://2023.antflix.net#divider_6_V" + }, + { + "body": "Luminaires and lighting equipment shall be connected to an equipment grounding conductor as required by Part V of this article. [410.40](https://2023.antflix.net#410.40)", + "displayTitle": "410.40 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#410.40" + }, + { + "body": "Exposed conductive surfaces shall be connected to an equipment grounding conductor. Exception: Exposed conductive surfaces that comply with any of the following shall not be required to be connected to an equipment grounding conductor: (1) Surfaces separated from all live parts by a listed system of double insulation (2) Surfaces on small isolated parts, such as mounting screws, clips, and decorative bands on glass spaced at least 38 mm (11/2 in.) from lamp terminals (3) Surfaces on portable luminaires with a polarized attachment plug [410.42](https://2023.antflix.net#410.42)", + "displayTitle": "410.42 Luminaire(s) With Exposed Conductive Surfaces", + "children": [], + "url": "https://2023.antflix.net#410.42" + }, + { + "body": "Luminaires and equipment that require connection to an equipment grounding conductor in accordance with 410.42 shall be mechanically connected to an equipment grounding conductor. Exception No. 1: Replacement luminaires shall be permitted to connect an equipment grounding conductor in the same manner as replacement receptacles in compliance with 250.130(C). The luminaire shall then comply with 410.42. Exception No. 2: Where no equipment grounding conductor exists at the outlet, replacement luminaires that are GECI protected or do not have exposed conductive parts shall not be required to be connected to an equipment grounding conductor. [410.44](https://2023.antflix.net#410.44)", + "displayTitle": "410.44 Connection to the Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#410.44" + }, + { + "displayTitle": "Part VI Wiring of Luminaires", + "children": [], + "url": "https://2023.antflix.net#divider_4_VI" + }, + { + "body": "Wiring on or within luminaires shall be neatly arranged and shall not be exposed to physical damage. Excess wiring shall be avoided. Conductors shall be arranged so that they are not subjected to temperatures above those for which they are rated. [410.50](https://2023.antflix.net#410.50)", + "displayTitle": "410.50 Luminaire Wiring - General", + "children": [], + "url": "https://2023.antflix.net#410.50" + }, + { + "body": "Luminaires shall be wired so that the screw shells of lampholders are connected to the same luminaire or circuit conductor or terminal. The grounded conductor, where connected to a screw shell lampholder, shall be connected to the screw shell. [410.51](https://2023.antflix.net#410.51)", + "displayTitle": "410.51 Polarization of Luminaires", + "children": [], + "url": "https://2023.antflix.net#410.51" + }, + { + "body": "Luminaires shall be wired with conductors having insulation suitable for the environmental conditions, current, voltage, and temperature to which the conductors will be subjected. Informational Note: See 402.3, 402.5, and 402.6 for ampacity of fixture wire, maximum operating temperature, voltage limitations, and minimum wire size. [410.52](https://2023.antflix.net#410.52)", + "displayTitle": "410.52 Conductor Insulation", + "children": [], + "url": "https://2023.antflix.net#410.52" + }, + { + "displayTitle": "410.54 Pendant Conductors for Incandescent Filament Lamps", + "children": [ + { + "body": "Pendant lampholders with permanently attached leads, where used for other than festoon wiring, shall be hung from separate stranded rubber-covered conductors that are soldered directly to the circuit conductors but supported independently thereof. [410.54_(A)](https://2023.antflix.net#410.54_(A))", + "displayTitle": "(A) Support", + "children": [], + "url": "https://2023.antflix.net#410.54_(A)" + }, + { + "body": "Unless part of listed decorative lighting assemblies, pendant conductors shall not be smaller than 14 AWG for mogul-base or medium-base screw shell lampholders or smaller than 18 AWG for intermediate or candelabra-base lampholders. [410.54_(B)](https://2023.antflix.net#410.54_(B))", + "displayTitle": "(B) Size", + "children": [], + "url": "https://2023.antflix.net#410.54_(B)" + }, + { + "body": "Pendant conductors longer than 900 mm (3 ft) shall be twisted together where not cabled in a listed assembly. [410.54_(C)](https://2023.antflix.net#410.54_(C))", + "displayTitle": "(C) Twisted or Cabled", + "children": [], + "url": "https://2023.antflix.net#410.54_(C)" + } + ], + "url": "https://2023.antflix.net#410.54" + }, + { + "displayTitle": "410.56 Protection of Conductors and Insulation", + "children": [ + { + "body": "Conductors shall be secured in a manner that does not tend to cut or abrade the insulation. [410.56_(A)](https://2023.antflix.net#410.56_(A))", + "displayTitle": "(A) Properly Secured", + "children": [], + "url": "https://2023.antflix.net#410.56_(A)" + }, + { + "body": "Conductor insulation shall be protected from abrasion where it passes through metal. [410.56_(B)](https://2023.antflix.net#410.56_(B))", + "displayTitle": "(B) Protection Through Metal", + "children": [], + "url": "https://2023.antflix.net#410.56_(B)" + }, + { + "body": "Splices and taps shall not be located within luminaire arms or stems. [410.56_(C)](https://2023.antflix.net#410.56_(C))", + "displayTitle": "(C) Luminaire Stems", + "children": [], + "url": "https://2023.antflix.net#410.56_(C)" + }, + { + "body": "No unnecessary splices or taps shall be made within or on a luminaire. Informational Note: See 110.14 for approved means of making connections. [410.56_(D)](https://2023.antflix.net#410.56_(D))", + "displayTitle": "(D) Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#410.56_(D)" + }, + { + "body": "Stranded conductors shall be used for wiring on luminaire chains and on other movable or flexible parts. [410.56_(E)](https://2023.antflix.net#410.56_(E))", + "displayTitle": "(E) Stranding", + "children": [], + "url": "https://2023.antflix.net#410.56_(E)" + }, + { + "body": "Conductors shall be arranged so that the weight of the luminaire or movable parts does not put tension on the conductors. [410.56_(F)](https://2023.antflix.net#410.56_(F))", + "displayTitle": "(F) Tension", + "children": [], + "url": "https://2023.antflix.net#410.56_(F)" + } + ], + "url": "https://2023.antflix.net#410.56" + }, + { + "body": "Individual showcases, other than fixed, shall be permitted to be connected by flexible cord to permanently installed receptacles, and groups of not more than six such showcases shall be permitted to be coupled together by flexible cord and separable locking-type connectors with one of the group connected by flexible cord to a permanently installed receptacle. The installation shall comply with 410.59(A) through (E). [410.59](https://2023.antflix.net#410.59)", + "displayTitle": "410.59 Cord-Connected Showcases", + "children": [ + { + "body": "Flexible cord shall be of the hard-service type, having conductors not smaller than the branch-circuit conductors, having ampacity at least equal to the branch-circuit overcurrent device, and having an equipment grounding conductor. Informational Note: See Table 250.122 for size of equipment grounding conductor. [410.59_(A)](https://2023.antflix.net#410.59_(A))", + "displayTitle": "(A) Cord Requirements", + "children": [], + "url": "https://2023.antflix.net#410.59_(A)" + }, + { + "body": "Receptacles, connectors, and attachment plugs shall be of a listed grounding type rated 15 or 20 amperes. [410.59_(B)](https://2023.antflix.net#410.59_(B))", + "displayTitle": "(B) Receptacles, Connectors, and Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#410.59_(B)" + }, + { + "body": "Flexible cords shall be secured to the undersides of showcases such that all of the following conditions are ensured: The wiring is not exposed to physical damage.The separation between cases is not in excess of 50 mm (2 in.), or more than 300 mm (12 in.) between the first case and the supply receptacle.The free lead at the end of a group of showcases has a female fitting not extending beyond the case. [410.59_(C)](https://2023.antflix.net#410.59_(C))", + "displayTitle": "(C) Support", + "children": [], + "url": "https://2023.antflix.net#410.59_(C)" + }, + { + "body": "Equipment other than showcases shall not be electrically connected to showcases. [410.59_(D)](https://2023.antflix.net#410.59_(D))", + "displayTitle": "(D) No Other Equipment", + "children": [], + "url": "https://2023.antflix.net#410.59_(D)" + }, + { + "body": "Where showcases are cord-connected, the secondary circuit(s) of each electric-discharge lighting ballast shall be limited to one showcase. [410.59_(E)](https://2023.antflix.net#410.59_(E))", + "displayTitle": "(E) Secondary Circuit(s)", + "children": [], + "url": "https://2023.antflix.net#410.59_(E)" + } + ], + "url": "https://2023.antflix.net#410.59" + }, + { + "displayTitle": "410.62 Cord-Connected Lampholders and Luminaires", + "children": [ + { + "body": "Where a metal lampholder is attached to a flexible cord, the inlet shall be equipped with an insulating bushing that, if threaded, is not smaller than metric designator 12 (trade size 3/8). The cord hole shall be of a size appropriate for the cord, and all burrs and fins shall be removed in order to provide a smooth bearing surface for the cord. Bushing having holes 7 mm (9/32 in.) in diameter shall be permitted for use with plain pendant cord and holes 11 mm (13/32 in.) in diameter with reinforced cord. [410.62_(A)](https://2023.antflix.net#410.62_(A))", + "displayTitle": "(A) Lampholders", + "children": [], + "url": "https://2023.antflix.net#410.62_(A)" + }, + { + "body": "Luminaires that require adjusting or aiming after installation shall not be required to be equipped with an attachment plug or cord connector, provided the exposed cord is suitable for hard-usage or extra-hard-usage and is not longer than that required for maximum adjustment. The cord shall not be subject to strain or physical damage. Informational Note: See Table 400.4, \"Use\" column for application provisions. [410.62_(B)](https://2023.antflix.net#410.62_(B))", + "displayTitle": "(B) Adjustable Luminaires", + "children": [], + "url": "https://2023.antflix.net#410.62_(B)" + }, + { + "body": "Electric-discharge and LED luminaires shall comply with 410.62(C)(1), (C)(2), and (C)(3), as applicable. [410.62_(C)](https://2023.antflix.net#410.62_(C))", + "displayTitle": "(C) Electric-Discharge and LED Luminaires", + "children": [ + { + "body": "A luminaire or a listed assembly in compliance with any of the conditions in 410.62(C)(1)(a) through (C)(1)(c) shall be permitted to be cord connected provided the luminaire is located directly below the outlet or busway, the cord is not subject to strain or physical damage, and the cord is visible over its entire length except at terminations. Informational Note: See 400.10, Uses Permitted, and 400.12, Uses Not Permitted.A luminaire shall be permitted to be connected with a cord terminating in a grounding-type attachment plug or busway plug. If grounding is not required in accordance with 410.42, a polarized-type plug shall be permitted.A luminaire assembly equipped with a strain relief and canopy shall be permitted to use a cord connection between the luminaire assembly and the canopy. The canopy shall be permitted to include a section of raceway not over 150 mm (6 in.) in length and intended to facilitate the connection to an outlet box mounted above a suspended ceiling.Listed luminaires connected using listed assemblies that incorporate manufactured wiring system connectors in accordance with 604.100(C) shall be permitted to be cord connected. [410.62_(C)_(1)](https://2023.antflix.net#410.62_(C)_(1))", + "displayTitle": "(1) Cord-Connected Installation", + "children": [], + "url": "https://2023.antflix.net#410.62_(C)_(1)" + }, + { + "body": "Electric-discharge luminaires provided with mogul-base, screw shell lampholders shall be permitted to be connected to branch circuits of 50 amperes or less by cords complying with 240.5. Receptacles and attachment plugs shall be permitted to be of a lower ampere rating than the branch circuit but not less than 125 percent of the luminaire full-load current. [410.62_(C)_(2)](https://2023.antflix.net#410.62_(C)_(2))", + "displayTitle": "(2) Provided With Mogul-Base, Screw Shell Lampholders", + "children": [], + "url": "https://2023.antflix.net#410.62_(C)_(2)" + }, + { + "body": "Electric-discharge luminaires equipped with a flanged surface inlet shall be permitted to be supplied by cord pendants equipped with cord connectors. Inlets and connectors shall be permitted to be of a lower ampere rating than the branch circuit but not less than 125 percent of the luminaire load current. [410.62_(C)_(3)](https://2023.antflix.net#410.62_(C)_(3))", + "displayTitle": "(3) Equipped With Flanged Surface Inlet", + "children": [], + "url": "https://2023.antflix.net#410.62_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#410.62_(C)" + } + ], + "url": "https://2023.antflix.net#410.62" + }, + { + "body": "Luminaires shall not be used as a raceway for circuit conductors unless they comply with 410.64(A), (B), or (C). [410.64](https://2023.antflix.net#410.64)", + "displayTitle": "410.64 Luminaires as Raceways", + "children": [ + { + "body": "Luminaires listed and marked for use as a raceway shall be permitted to be used as a raceway. [410.64_(A)](https://2023.antflix.net#410.64_(A))", + "displayTitle": "(A) Listed", + "children": [], + "url": "https://2023.antflix.net#410.64_(A)" + }, + { + "body": "Luminaires identified for through-wiring, as permitted by 410.21, shall be permitted to be used as a raceway. [410.64_(B)](https://2023.antflix.net#410.64_(B))", + "displayTitle": "(B) Through-Wiring", + "children": [], + "url": "https://2023.antflix.net#410.64_(B)" + }, + { + "body": "Luminaires designed for end-to-end connection to form a continuous assembly, or luminaires connected together by recognized wiring methods, shall be permitted to contain the conductors of a 2-wire branch circuit, or one multiwire branch circuit, supplying the connected luminaires and shall not be required to be listed as a race-way. One additional 2-wire branch circuit separately supplying one or more of the connected luminaires shall also be permitted. Informational Note: See Article 100 for the definition of Multiwire Branch Circuit. [410.64_(C)](https://2023.antflix.net#410.64_(C))", + "displayTitle": "(C) Luminaires Connected Together", + "children": [], + "url": "https://2023.antflix.net#410.64_(C)" + } + ], + "url": "https://2023.antflix.net#410.64" + }, + { + "body": "Feeder and branch-circuit conductors within 75 mm (3 in.) of a ballast, LED driver, power supply, or transformer shall have an insulation temperature rating not lower than 90\u00b0C (194\u00b0F), unless supplying a luminaire marked as suitable for a different insulation temperature. [410.68](https://2023.antflix.net#410.68)", + "displayTitle": "410.68 Feeder and Branch-Circuit Conductors and Ballasts", + "children": [], + "url": "https://2023.antflix.net#410.68" + }, + { + "body": "Where control conductors are spliced, terminated, or connected in the same luminaire or enclosure as the branch-circuit conductors, the field-connected control conductor shall not be of a color reserved for the grounded branch-circuit conductor or the equipment grounding conductor. Informational Note: See 200.6 for identification of grounded conductor and 250.119 for identification of equipment grounding conductor. Exception: A field-connected gray-colored control conductor shall be permitted if the insulation is permanently re-identified by marking tape, painting, or other effective means at its termination and at each location where the conductor is visible and accessible. Identification shall encircle the insulation and shall be a color other than white, gray, or green. [410.69](https://2023.antflix.net#410.69)", + "displayTitle": "410.69 Identification of Control Conductor Insulation", + "children": [], + "url": "https://2023.antflix.net#410.69" + }, + { + "body": "Air space shall be provided between lamps and shades or other enclosures of combustible material. [410.70](https://2023.antflix.net#410.70)", + "displayTitle": "410.70 Combustible Shades and Enclosures", + "children": [], + "url": "https://2023.antflix.net#410.70" + }, + { + "displayTitle": "410.71 Disconnecting Means for Fluorescent or LED Luminaires That Utilize Double-Ended Lamps", + "children": [ + { + "body": "In indoor locations other than dwellings and associated accessory structures, fluorescent or LED luminaires that utilize double-ended lamps and contain ballast(s) or LED driver(s) that can be serviced in place shall have a disconnecting means either internal or external to each luminaire. For existing installed luminaires without disconnecting means, at the time a ballast or LED driver is added or replaced a disconnecting means shall be installed. The line side terminals of the disconnecting means shall be guarded. Exception No. 1: A disconnecting means shall not be required for luminaires installed in hazardous (classified) location(s). Exception No. 2: A disconnecting means shall not be required for luminaires that provide emergency illumination required in 700.16. Exception No. 3: For cord-and-plug-connected luminaires, an accessible separable connector or an accessible plug and receptacle shall be permitted to serve as the disconnecting means. Exception No. 4: Disconnecting means shall not be required for every luminaire in a building area if all of the following conditions apply: (1) More than one luminaire is installed in the building area (2) The luminaires are not connected to a multiwire branch circuit (3) The design of the installation includes disconnecting means (4) The building area will not be left in total darkness should only one disconnect be opened [410.71_(1)](https://2023.antflix.net#410.71_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#410.71_(1)" + }, + { + "body": "When connected to multiwire branch circuits, the disconnecting means shall simultaneously break all the supply conductors to the ballast, including the grounded conductor. [410.71_(2)](https://2023.antflix.net#410.71_(2))", + "displayTitle": "(2) Multiwire Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#410.71_(2)" + }, + { + "body": "The disconnecting means shall be located so as to be accessible to qualified persons before servicing or maintaining the ballast. Where the disconnecting means is external to the luminaire, it shall be a single device, and it shall be attached to the luminaire or the luminaire shall be located within sight of the disconnecting means. [410.71_(3)](https://2023.antflix.net#410.71_(3))", + "displayTitle": "(3) Location", + "children": [], + "url": "https://2023.antflix.net#410.71_(3)" + } + ], + "url": "https://2023.antflix.net#410.71" + }, + { + "displayTitle": "Part VII Construction of Luminaires", + "children": [], + "url": "https://2023.antflix.net#divider_4_VII" + }, + { + "displayTitle": "410.80 Luminaire Rating", + "children": [ + { + "body": "All luminaires shall be marked with the maximum lamp wattage or electrical rating, manufacturer's name, trademark, or other suitable means of identification. A luminaire requiring supply wire rated higher than 60\u00b0C (140\u00b0F) shall be marked with the minimum supply wire temperature rating on the luminaire and shipping carton or equivalent. [410.80_(A)](https://2023.antflix.net#410.80_(A))", + "displayTitle": "(A) Marking", + "children": [], + "url": "https://2023.antflix.net#410.80_(A)" + }, + { + "body": "The electrical rating shall include the voltage and frequency and shall indicate the current rating of the unit, including the ballast, transformer, LED driver, power supply, or autotransformer. [410.80_(B)](https://2023.antflix.net#410.80_(B))", + "displayTitle": "(B) Electrical Rating", + "children": [], + "url": "https://2023.antflix.net#410.80_(B)" + } + ], + "url": "https://2023.antflix.net#410.80" + }, + { + "body": "Portable luminaires shall be wired with flexible cord recognized by 400.4 and an attachment plug of the polarized or grounding type. If used with Edison-base lampholders, the grounded conductor shall be identified and attached to the screw shell and the identified blade of the attachment plug. [410.82](https://2023.antflix.net#410.82)", + "displayTitle": "410.82 Portable Luminaires", + "children": [], + "url": "https://2023.antflix.net#410.82" + }, + { + "body": "A bushing or the equivalent shall be provided where flexible cord enters the base or stem of a portable luminaire. The bushing shall be of insulating material unless a jacketed type of cord is used. [410.84](https://2023.antflix.net#410.84)", + "displayTitle": "410.84 Cord Bushings", + "children": [], + "url": "https://2023.antflix.net#410.84" + }, + { + "displayTitle": "Part VIII Installation of Lampholders", + "children": [], + "url": "https://2023.antflix.net#divider_4_VIII" + }, + { + "body": "Lampholders of the screw shell type shall be installed for use as lampholders only. Where supplied by a circuit having a grounded conductor, the grounded conductor shall be connected to the screw shell. [410.90](https://2023.antflix.net#410.90)", + "displayTitle": "410.90 Screw Shell Type", + "children": [], + "url": "https://2023.antflix.net#410.90" + }, + { + "body": "Where supplied by the ungrounded conductors of a circuit, the switching device of lampholders of the switched type shall simultaneously disconnect both conductors of the circuit. [410.93](https://2023.antflix.net#410.93)", + "displayTitle": "410.93 Double-Pole Switched Lampholders", + "children": [], + "url": "https://2023.antflix.net#410.93" + }, + { + "body": "Lampholders installed in wet locations shall be listed for use in wet locations. Lampholders installed in damp locations shall be listed for damp locations or shall be listed for wet locations. [410.96](https://2023.antflix.net#410.96)", + "displayTitle": "410.96 Lampholders in Wet or Damp Locations", + "children": [], + "url": "https://2023.antflix.net#410.96" + }, + { + "body": "Lampholders shall be constructed, installed, or equipped with shades or guards so that combustible material is not subjected to temperatures in excess of 90\u00b0C (194\u00b0F). [410.97](https://2023.antflix.net#410.97)", + "displayTitle": "410.97 Lampholders Near Combustible Material", + "children": [], + "url": "https://2023.antflix.net#410.97" + }, + { + "displayTitle": "Part IX Lamps and Auxiliary Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_4_IX" + }, + { + "body": "An incandescent lamp for general use on lighting branch circuits shall not be equipped with a medium base if rated over 300 watts, or with a mogul base if rated over 1500 watts. Special bases or other devices shall be used for over 1500 watts. [410.100](https://2023.antflix.net#410.100)", + "displayTitle": "410.100 Bases, Incandescent Lamps", + "children": [], + "url": "https://2023.antflix.net#410.100" + }, + { + "displayTitle": "410.104 Electric-Discharge Lamp Auxiliary Equipment", + "children": [ + { + "body": "Auxiliary equipment for electric-discharge lamps shall be enclosed in noncombustible cases and treated as sources of heat. [410.104_(A)](https://2023.antflix.net#410.104_(A))", + "displayTitle": "(A) Enclosures", + "children": [], + "url": "https://2023.antflix.net#410.104_(A)" + }, + { + "body": "Where supplied by the ungrounded conductors of a circuit, the switching device of auxiliary equipment shall simultaneously disconnect all conductors. [410.104_(B)](https://2023.antflix.net#410.104_(B))", + "displayTitle": "(B) Switching", + "children": [], + "url": "https://2023.antflix.net#410.104_(B)" + } + ], + "url": "https://2023.antflix.net#410.104" + }, + { + "displayTitle": "Part X Special Provisions for Flush and Recessed Luminaires", + "children": [], + "url": "https://2023.antflix.net#divider_4_X" + }, + { + "body": "Luminaires installed in recessed cavities in walls or ceilings, including suspended ceilings, shall comply with 410.115 through 410.126. [410.110](https://2023.antflix.net#410.110)", + "displayTitle": "410.110 General", + "children": [], + "url": "https://2023.antflix.net#410.110" + }, + { + "displayTitle": "410.115 Temperature", + "children": [ + { + "body": "Luminaires shall be installed so that adjacent combustible material will not be subjected to temperatures in excess of 90\u00b0C (194\u00b0F). [410.115_(A)](https://2023.antflix.net#410.115_(A))", + "displayTitle": "(A) Combustible Material", + "children": [], + "url": "https://2023.antflix.net#410.115_(A)" + }, + { + "body": "Incandescent luminaires shall have thermal protection and shall be identified as thermally protected. Exception No. 1: Thermal protection shall not be required in a recessed luminaire identified for use and installed in poured concrete. Exception No. 2: Thermal protection shall not be required in a recessed luminaire whose design, construction, and thermal performance characteristics are equivalent to a thermally protected luminaire and are identified as inherently protected. [410.115_(B)](https://2023.antflix.net#410.115_(B))", + "displayTitle": "(B) Recessed Incandescent Luminaires", + "children": [], + "url": "https://2023.antflix.net#410.115_(B)" + } + ], + "url": "https://2023.antflix.net#410.115" + }, + { + "displayTitle": "410.116 Clearance and Installation", + "children": [ + { + "displayTitle": "(A) Clearance From Combustible Material", + "children": [ + { + "body": "A recessed luminaire that is not identified for contact with insulation shall have all recessed parts spaced not less than 13 mm (1/2 in.) from combustible materials. The points of support and the trim finishing off the openings in the ceiling, wall, or other finished surface shall be permitted to be in contact with combustible materials. [410.116_(A)_(1)](https://2023.antflix.net#410.116_(A)_(1))", + "displayTitle": "(1) Non-Type IC", + "children": [], + "url": "https://2023.antflix.net#410.116_(A)_(1)" + }, + { + "body": "A recessed luminaire that is identified for contact with insulation, Type IC, shall be permitted to be in contact with combustible materials at recessed parts, points of support, and portions passing through or finishing off the opening in the building structure. [410.116_(A)_(2)](https://2023.antflix.net#410.116_(A)_(2))", + "displayTitle": "(2) Type IC", + "children": [], + "url": "https://2023.antflix.net#410.116_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#410.116_(A)" + }, + { + "body": "Thermal insulation shall not be installed above a recessed luminaire or within 75 mm (3 in.) of the recessed luminaire's enclosure, wiring compartment, ballast, transformer, LED driver, or power supply unless the luminaire is identified as Type IC for insulation contact. [410.116_(B)](https://2023.antflix.net#410.116_(B))", + "displayTitle": "(B) Clearance From Thermal Insulation", + "children": [], + "url": "https://2023.antflix.net#410.116_(B)" + }, + { + "body": "Luminaires marked \"FOR USE IN NON-FIRE-RATED INSTALLATIONS\" shall not be used in fire-rated installations. Where a luminaire is recessed in fire-resistant material in a building of fire-resistant construction, the recessed luminaire shall satisfy one of the following: The recessed luminaire shall be listed for use in a fire resistance\u2014rated construction.The recessed luminaire shall be installed in or used with a luminaire enclosure that is listed for use in a fire resistance-rated construction.The recessed luminaire shall be listed and shall be installed in accordance with a tested fire resistance-rated assembly. When a tested fire resistance-rated assembly allows the installation of a recessed fluorescent luminaire, a recessed LED luminaire of comparable construction shall be permitted. [410.116_(C)](https://2023.antflix.net#410.116_(C))", + "displayTitle": "(C) Installation in Fire-Resistant Construction", + "children": [], + "url": "https://2023.antflix.net#410.116_(C)" + } + ], + "url": "https://2023.antflix.net#410.116" + }, + { + "displayTitle": "410.117 Wiring", + "children": [ + { + "body": "Conductors that have insulation suitable for the temperature encountered shall be used. [410.117_(A)](https://2023.antflix.net#410.117_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#410.117_(A)" + }, + { + "body": "Branch-circuit conductors that have an insulation suitable for the temperature encountered shall be permitted to terminate in the luminaire. [410.117_(B)](https://2023.antflix.net#410.117_(B))", + "displayTitle": "(B) Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#410.117_(B)" + }, + { + "body": "Tap conductors of a type suitable for the temperature encountered shall be permitted to run from the luminaire terminal connection to an outlet box placed at least 300 mm (1 ft) from the luminaire. Such tap conductors shall be in suitable raceway or Type AC or MC cable of at least 450 mm (18 in.) but not more than 1.8 m (6 ft) in length. [410.117_(C)](https://2023.antflix.net#410.117_(C))", + "displayTitle": "(C) Tap Conductors", + "children": [], + "url": "https://2023.antflix.net#410.117_(C)" + } + ], + "url": "https://2023.antflix.net#410.117" + }, + { + "body": "Luminaires recessed in ceilings, floors, or walls shall not be used to access outlet, pull, or junction boxes or conduit bodies, unless the box or conduit body is an integral part of the listed luminaire. [410.118](https://2023.antflix.net#410.118)", + "displayTitle": "410.118 Access to Other Boxes", + "children": [], + "url": "https://2023.antflix.net#410.118" + }, + { + "displayTitle": "Part XI Construction of Flush and Recessed Luminaires", + "children": [], + "url": "https://2023.antflix.net#divider_4_XI" + }, + { + "body": "Luminaires shall be constructed such that adjacent combustible material is not subject to temperatures in excess of 90\u00b0C (194\u00b0F). [410.120](https://2023.antflix.net#410.120)", + "displayTitle": "410.120 Temperature", + "children": [], + "url": "https://2023.antflix.net#410.120" + }, + { + "body": "Incandescent lamp luminaires shall be marked to indicate the maximum allowable wattage of lamps. The markings shall be permanently installed, in letters at least 6 mm (1/4 in.) high, and shall be located where visible during relamping. [410.122](https://2023.antflix.net#410.122)", + "displayTitle": "410.122 Lamp Wattage Marking", + "children": [], + "url": "https://2023.antflix.net#410.122" + }, + { + "body": "No solder shall be used in the construction of a luminaire recessed housing. [410.124](https://2023.antflix.net#410.124)", + "displayTitle": "410.124 Solder Prohibited", + "children": [], + "url": "https://2023.antflix.net#410.124" + }, + { + "body": "Lampholders of the screw shell type shall be of porcelain or other suitable insulating materials. [410.126](https://2023.antflix.net#410.126)", + "displayTitle": "410.126 Lampholders", + "children": [], + "url": "https://2023.antflix.net#410.126" + }, + { + "displayTitle": "Part XII Special Provisions for Electric-Discharge Lighting Systems of 1000 Volts or Less", + "children": [], + "url": "https://2023.antflix.net#divider_4_XII" + }, + { + "displayTitle": "410.130 General", + "children": [ + { + "body": "Equipment for use with electric-discharge lighting systems and designed for an open-circuit voltage of 1000 volts or less shall be of a type identified for such service. [410.130_(A)](https://2023.antflix.net#410.130_(A))", + "displayTitle": "(A) Open-Circuit Voltage of 1000 Volts or Less", + "children": [], + "url": "https://2023.antflix.net#410.130_(A)" + }, + { + "body": "The terminals of an electric-discharge lamp shall be considered as energized where any lamp terminal is connected to a circuit of over 300 volts. [410.130_(B)](https://2023.antflix.net#410.130_(B))", + "displayTitle": "(B) Considered as Energized", + "children": [], + "url": "https://2023.antflix.net#410.130_(B)" + }, + { + "body": "Transformers of the oil-filled type shall not be used. [410.130_(C)](https://2023.antflix.net#410.130_(C))", + "displayTitle": "(C) Transformers of the Oil-Filled Type", + "children": [], + "url": "https://2023.antflix.net#410.130_(C)" + }, + { + "body": "In addition to complying with the general requirements for luminaires, such equipment shall comply with Part XII of this article. [410.130_(D)](https://2023.antflix.net#410.130_(D))", + "displayTitle": "(D) Additional Requirements", + "children": [], + "url": "https://2023.antflix.net#410.130_(D)" + }, + { + "displayTitle": "(E) Thermal Protection - Fluorescent Luminaires", + "children": [ + { + "body": "The ballast of a fluorescent luminaire installed indoors shall have integral thermal protection. Replacement ballasts shall also have thermal protection integral with the ballast. [410.130_(E)_(1)](https://2023.antflix.net#410.130_(E)_(1))", + "displayTitle": "(1) Integral Thermal Protection", + "children": [], + "url": "https://2023.antflix.net#410.130_(E)_(1)" + }, + { + "body": "A simple reactance ballast in a fluorescent luminaire with straight tubular lamps shall not be required to be thermally protected. [410.130_(E)_(2)](https://2023.antflix.net#410.130_(E)_(2))", + "displayTitle": "(2) Simple Reactance Ballasts", + "children": [], + "url": "https://2023.antflix.net#410.130_(E)_(2)" + }, + { + "body": "A ballast in a fluorescent exit luminaire shall not have thermal protection. [410.130_(E)_(3)](https://2023.antflix.net#410.130_(E)_(3))", + "displayTitle": "(3) Exit Luminaires", + "children": [], + "url": "https://2023.antflix.net#410.130_(E)_(3)" + }, + { + "body": "A ballast in a fluorescent luminaire that is used for egress lighting and energized only during a failure of the normal supply shall not have thermal protection. [410.130_(E)_(4)](https://2023.antflix.net#410.130_(E)_(4))", + "displayTitle": "(4) Egress Luminaires", + "children": [], + "url": "https://2023.antflix.net#410.130_(E)_(4)" + } + ], + "url": "https://2023.antflix.net#410.130_(E)" + }, + { + "displayTitle": "(F) High-Intensity Discharge Luminaires", + "children": [ + { + "body": "Recessed high-intensity luminaires designed to be installed in wall or ceiling cavities shall have thermal protection and be identified as thermally protected. [410.130_(F)_(1)](https://2023.antflix.net#410.130_(F)_(1))", + "displayTitle": "(1) Recessed", + "children": [], + "url": "https://2023.antflix.net#410.130_(F)_(1)" + }, + { + "body": "Thermal protection shall not be required in a recessed high-intensity luminaire whose design, construction, and thermal performance characteristics are equivalent to a thermally protected luminaire and are identified as inherently protected. [410.130_(F)_(2)](https://2023.antflix.net#410.130_(F)_(2))", + "displayTitle": "(2) Inherently Protected", + "children": [], + "url": "https://2023.antflix.net#410.130_(F)_(2)" + }, + { + "body": "Thermal protection shall not be required in a recessed high-intensity discharge luminaire identified for use and installed in poured concrete. [410.130_(F)_(3)](https://2023.antflix.net#410.130_(F)_(3))", + "displayTitle": "(3) Installed in Poured Concrete", + "children": [], + "url": "https://2023.antflix.net#410.130_(F)_(3)" + }, + { + "body": "A recessed remote ballast for a high-intensity discharge luminaire shall have thermal protection that is integral with the ballast and shall be identified as thermally protected. [410.130_(F)_(4)](https://2023.antflix.net#410.130_(F)_(4))", + "displayTitle": "(4) Recessed Remote Ballasts", + "children": [], + "url": "https://2023.antflix.net#410.130_(F)_(4)" + }, + { + "body": "Luminaires that use a metal halide lamp other than a thick-glass parabolic reflector lamp (PAR) shall be provided with a containment barrier that encloses the lamp, or shall be provided with a physical means that only allows the use of a lamp that is Type O. Informational Note: See ANSI C78.389, American National Standard for Electric Lamps -High Intensity Discharge, Methods of Measuring Characteristics. [410.130_(F)_(5)](https://2023.antflix.net#410.130_(F)_(5))", + "displayTitle": "(5) Metal Halide Lamp Containment", + "children": [], + "url": "https://2023.antflix.net#410.130_(F)_(5)" + } + ], + "url": "https://2023.antflix.net#410.130_(F)" + } + ], + "url": "https://2023.antflix.net#410.130" + }, + { + "body": "Luminaires installed on dc circuits shall be equipped with auxiliary equipment and resistors designed for dc operation. The luminaires shall be marked for dc operation. [410.134](https://2023.antflix.net#410.134)", + "displayTitle": "410.134 Direct-Current Equipment", + "children": [], + "url": "https://2023.antflix.net#410.134" + }, + { + "body": "Equipment having an open-circuit voltage exceeding 300 volts shall not be installed in dwelling occupancies unless such equipment is designed so that there will be no exposed live parts when lamps are being inserted, are in place, or are being removed. [410.135](https://2023.antflix.net#410.135)", + "displayTitle": "410.135 Open-Circuit Voltage Exceeding 300 Volts", + "children": [], + "url": "https://2023.antflix.net#410.135" + }, + { + "displayTitle": "410.136 Luminaire Mounting", + "children": [ + { + "body": "Luminaires that have exposed ballasts, transformers, LED drivers, or power supplies shall be installed such that ballasts, transformers, LED drivers, or power supplies shall not be in contact with combustible material unless listed for such condition. [410.136_(A)](https://2023.antflix.net#410.136_(A))", + "displayTitle": "(A) Exposed Components", + "children": [], + "url": "https://2023.antflix.net#410.136_(A)" + }, + { + "body": "Where a surface-mounted luminaire containing a ballast, transformer, LED driver, or power supply is to be installed on combustible low-density cellulose fiberboard, it shall be marked for this condition or shall be spaced not less than 38 mm (11/2 in.) from the surface of the fiberboard. Where such luminaires are partially or wholly recessed, 410.110 through 410.126 shall apply. Informational Note: See ASTM E84-20, Standard Test Method for Surface Burning Characteristics of Building Materials, or ANSI/UL 723-2018, Standard for Test for Surface Burning Characteristics of Building Materials. Combustible low-density cellulose fiberboard includes sheets, panels, and tiles that have a density of 320 kg/m3 (20 lb/ft3) or less and that are formed of bonded plant fiber material but does not include solid or laminated wood or fiberboard that has a density in excess of 320 kg/m3 (20 lb/ft3) or is a material that has been integrally treated with fire-retarding chemicals to the degree that the flame spread index in any plane of the material will not exceed 25, determined in accordance with tests for surface burning characteristics of building materials. [410.136_(B)](https://2023.antflix.net#410.136_(B))", + "displayTitle": "(B) Combustible Low-Density Cellulose Fiberboard", + "children": [], + "url": "https://2023.antflix.net#410.136_(B)" + } + ], + "url": "https://2023.antflix.net#410.136" + }, + { + "displayTitle": "410.137 Equipment Not Integral With Luminaire", + "children": [ + { + "body": "Auxiliary equipment, including reactors, capacitors, resistors, and similar equipment, where not installed as part of a luminaire assembly, shall be enclosed in accessible, permanently installed metal cabinets. [410.137_(A)](https://2023.antflix.net#410.137_(A))", + "displayTitle": "(A) Metal Cabinets", + "children": [], + "url": "https://2023.antflix.net#410.137_(A)" + }, + { + "body": "Separately mounted ballasts, transformers, LED drivers, or power supplies that are listed for direct connection to a wiring system shall not be required to be additionally enclosed. [410.137_(B)](https://2023.antflix.net#410.137_(B))", + "displayTitle": "(B) Separate Mounting", + "children": [], + "url": "https://2023.antflix.net#410.137_(B)" + }, + { + "body": "Wired luminaire sections are paired, with a ballast(s) or LED driver(s) supplying a light source or light sources in both. For interconnection between paired units, it shall be permissible to use metric designator 12 (trade size 3/8) flexible metal conduit in lengths not exceeding 7.5 m (25 ft), installed in accordance with Part II of Article 348. Luminaire wire operating at line voltage, supplying only the ballast(s) or LED driver(s) of one of the paired luminaires, shall be permitted in the same raceway as the light source supply wires of the paired luminaires where the voltage rating of the light source supply wires is greater than the line voltage. [410.137_(C)](https://2023.antflix.net#410.137_(C))", + "displayTitle": "(C) Wired Luminaire Sections", + "children": [], + "url": "https://2023.antflix.net#410.137_(C)" + } + ], + "url": "https://2023.antflix.net#410.137" + }, + { + "body": "An autotransformer that is used to raise the voltage to more than 300 volts, as part of a ballast for supplying lighting units, shall be supplied only by a grounded system. [410.138](https://2023.antflix.net#410.138)", + "displayTitle": "410.138 Autotransformers", + "children": [], + "url": "https://2023.antflix.net#410.138" + }, + { + "body": "Snap switches shall comply with 404.14. [410.139](https://2023.antflix.net#410.139)", + "displayTitle": "410.139 Switches", + "children": [], + "url": "https://2023.antflix.net#410.139" + }, + { + "displayTitle": "Part XIII Special Provisions for Electric-Discharge Lighting Systems of More Than 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#divider_4_XIII" + }, + { + "displayTitle": "410.140 General", + "children": [ + { + "body": "Electric-discharge lighting systems with an open-circuit voltage exceeding 1000 volts shall be listed and installed in conformance with that listing. [410.140_(A)](https://2023.antflix.net#410.140_(A))", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#410.140_(A)" + }, + { + "body": "Equipment that has an open-circuit voltage exceeding 1000 volts shall not be installed in or on dwelling occupancies. [410.140_(B)](https://2023.antflix.net#410.140_(B))", + "displayTitle": "(B) Dwelling Occupancies", + "children": [], + "url": "https://2023.antflix.net#410.140_(B)" + }, + { + "body": "The terminal of an electric-discharge lamp shall be considered as a live part. [410.140_(C)](https://2023.antflix.net#410.140_(C))", + "displayTitle": "(C) Live Parts", + "children": [], + "url": "https://2023.antflix.net#410.140_(C)" + }, + { + "body": "In addition to complying with the general requirements for luminaires, such equipment shall comply with Part XIII of this article. [410.140_(D)](https://2023.antflix.net#410.140_(D))", + "displayTitle": "(D) Additional Requirements", + "children": [], + "url": "https://2023.antflix.net#410.140_(D)" + } + ], + "url": "https://2023.antflix.net#410.140" + }, + { + "displayTitle": "410.141 Control", + "children": [ + { + "body": "Luminaires or lamp installation shall be controlled either singly or in groups by an externally operable switch or circuit breaker that opens all ungrounded primary conductors. [410.141_(A)](https://2023.antflix.net#410.141_(A))", + "displayTitle": "(A) Disconnection", + "children": [], + "url": "https://2023.antflix.net#410.141_(A)" + }, + { + "body": "The switch or circuit breaker shall be located within sight from the luminaires or lamps, or it shall be permitted to be located elsewhere if it is lockable open in accordance with 110.25. [410.141_(B)](https://2023.antflix.net#410.141_(B))", + "displayTitle": "(B) Within Sight or Locked Type", + "children": [], + "url": "https://2023.antflix.net#410.141_(B)" + } + ], + "url": "https://2023.antflix.net#410.141" + }, + { + "body": "Parts that must be removed for lamp replacement shall be hinged or held captive. Lamps or lampholders shall be designed so that there are no exposed live parts when lamps are being inserted or removed. [410.142](https://2023.antflix.net#410.142)", + "displayTitle": "410.142 Lamp Terminals and Lampholders", + "children": [], + "url": "https://2023.antflix.net#410.142" + }, + { + "displayTitle": "410.143 Transformers", + "children": [ + { + "body": "Transformers shall be enclosed, identified for the use, and listed. [410.143_(A)](https://2023.antflix.net#410.143_(A))", + "displayTitle": "(A) Type", + "children": [], + "url": "https://2023.antflix.net#410.143_(A)" + }, + { + "body": "The secondary circuit voltage shall not exceed 15,000 volts, nominal, under any load condition. The voltage to ground of any output terminals of the secondary circuit shall not exceed 7500 volts under any load conditions. [410.143_(B)](https://2023.antflix.net#410.143_(B))", + "displayTitle": "(B) Voltage", + "children": [], + "url": "https://2023.antflix.net#410.143_(B)" + }, + { + "body": "Transformers shall have a secondary short-circuit current rating of not more than 150 mA if the open-circuit voltage is over 7500 volts, and not more than 300 mA if the open-circuit voltage rating is 7500 volts or less. [410.143_(C)](https://2023.antflix.net#410.143_(C))", + "displayTitle": "(C) Rating", + "children": [], + "url": "https://2023.antflix.net#410.143_(C)" + }, + { + "body": "Secondary circuit outputs shall not be connected in parallel or in series. [410.143_(D)](https://2023.antflix.net#410.143_(D))", + "displayTitle": "(D) Secondary Connections", + "children": [], + "url": "https://2023.antflix.net#410.143_(D)" + } + ], + "url": "https://2023.antflix.net#410.143" + }, + { + "displayTitle": "410.144 Transformer Locations", + "children": [ + { + "body": "Transformers shall be accessible after installation. [410.144_(A)](https://2023.antflix.net#410.144_(A))", + "displayTitle": "(A) Accessible", + "children": [], + "url": "https://2023.antflix.net#410.144_(A)" + }, + { + "body": "Transformers shall be installed as near to the lamps as practicable to keep the secondary conductors as short as possible. [410.144_(B)](https://2023.antflix.net#410.144_(B))", + "displayTitle": "(B) Secondary Conductors", + "children": [], + "url": "https://2023.antflix.net#410.144_(B)" + }, + { + "body": "Transformers shall be located so that adjacent combustible materials are not subjected to temperatures in excess of 90\u00b0C (194\u00b0F). [410.144_(C)](https://2023.antflix.net#410.144_(C))", + "displayTitle": "(C) Adjacent to Combustible Materials", + "children": [], + "url": "https://2023.antflix.net#410.144_(C)" + } + ], + "url": "https://2023.antflix.net#410.144" + }, + { + "body": "Lamps shall not be located where normally exposed to physical damage. [410.145](https://2023.antflix.net#410.145)", + "displayTitle": "410.145 Exposure to Damage", + "children": [], + "url": "https://2023.antflix.net#410.145" + }, + { + "body": "Each luminaire or each secondary circuit of tubing having an open-circuit voltage of over 1000 volts shall have a clearly legible marking in letters not less than 6 mm (1/4 in.) high reading \"Caution _____ volts.\" The voltage indicated shall be the rated open-circuit voltage. The caution sign(s) or label(s) shall comply with 110.21 (B). [410.146](https://2023.antflix.net#410.146)", + "displayTitle": "410.146 Marking", + "children": [], + "url": "https://2023.antflix.net#410.146" + }, + { + "displayTitle": "Part XIV Lighting Track", + "children": [], + "url": "https://2023.antflix.net#divider_4_XIV" + }, + { + "displayTitle": "410.150 Installation", + "children": [ + { + "body": "Lighting track shall be permanently installed and permanently connected to a branch circuit. Only lighting track fittings shall be installed on lighting track. Lighting track fittings shall not be equipped with general-purpose receptacles. [410.150_(A)](https://2023.antflix.net#410.150_(A))", + "displayTitle": "(A) Lighting Track", + "children": [], + "url": "https://2023.antflix.net#410.150_(A)" + }, + { + "body": "The connected load on lighting track shall not exceed the rating of the track. Lighting track shall be supplied by a branch circuit having a rating not more than that of the track. The load calculation in 220.46(B) shall not be required to limit the length of track on a single branch circuit, and it shall not be required to limit the number of luminaires on a single track. [410.150_(B)](https://2023.antflix.net#410.150_(B))", + "displayTitle": "(B) Connected Load", + "children": [], + "url": "https://2023.antflix.net#410.150_(B)" + }, + { + "body": "Lighting track shall not be installed in the following locations: Where likely to be subjected to physical damageIn wet or damp locationsWhere subject to corrosive vaporsIn storage battery roomsIn hazardous (classified) locationsWhere concealedWhere extended through walls or partitionsLess than 1.5 m (5 ft) above the finished floor except where protected from physical damage or track operating at less than 30 volts rms open-circuit voltageWhere prohibited by 410.10(D) [410.150_(C)](https://2023.antflix.net#410.150_(C))", + "displayTitle": "(C) Locations Not Permitted", + "children": [], + "url": "https://2023.antflix.net#410.150_(C)" + }, + { + "body": "Fittings identified for use on lighting (rack shall be designed specifically for the track on which they are to be installed. They shall be securely fastened to the track, shall maintain polarization and connections to the equipment grounding conductor, and shall be designed to be suspended directly from the track. [410.150_(D)](https://2023.antflix.net#410.150_(D))", + "displayTitle": "(D) Support", + "children": [], + "url": "https://2023.antflix.net#410.150_(D)" + } + ], + "url": "https://2023.antflix.net#410.150" + }, + { + "body": "Heavy-duty lighting track is lighting track identified for use exceeding 20 amperes. Each fitting attached to a heavy-duty lighting track shall have individual overcurrent protection. [410.153](https://2023.antflix.net#410.153)", + "displayTitle": "410.153 Heavy-Duty Lighting Track", + "children": [], + "url": "https://2023.antflix.net#410.153" + }, + { + "body": "Lighting track shall be securely mounted so that each fastening is suitable for supporting the maximum weight of luminaires that can be installed. Unless identified for supports at greater intervals, a single section 1.2 m (4 ft) or shorter in length shall have two supports, and, where installed in a continuous row, each individual section of not more than 1.2 m (4 ft) in length shall have one additional support. [410.154](https://2023.antflix.net#410.154)", + "displayTitle": "410.154 Fastening", + "children": [], + "url": "https://2023.antflix.net#410.154" + }, + { + "displayTitle": "410.155 Construction Requirements", + "children": [ + { + "body": "The housing for the lighting track system shall be of substantial construction to maintain rigidity. The conductors shall be installed within the track housing, permitting insertion of a luminaire, and designed to prevent tampering and accidental contact with live parts. Components of lighting track systems of different voltages shall not be interchangeable. The track conductors shall be a minimum 12 AWG or equal and shall be copper. The track system ends shall be insulated and capped. [410.155_(A)](https://2023.antflix.net#410.155_(A))", + "displayTitle": "(A) Construction", + "children": [], + "url": "https://2023.antflix.net#410.155_(A)" + }, + { + "body": "Lighting track shall be connected to the equipment grounding conductor in accordance with Part V of this article, and the track sections shall be securely coupled to maintain continuity of the circuitry, polarization, and grounding throughout. [410.155_(B)](https://2023.antflix.net#410.155_(B))", + "displayTitle": "(B) Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#410.155_(B)" + } + ], + "url": "https://2023.antflix.net#410.155" + }, + { + "displayTitle": "Part XV Decorative Lighting and Similar Accessories", + "children": [], + "url": "https://2023.antflix.net#divider_4_XV" + }, + { + "body": "Decorative lighting and similar accessories used for holiday lighting and similar purposes, in accordance with 590.3(B), shall be listed. [410.160](https://2023.antflix.net#410.160)", + "displayTitle": "410.160 Listing of Decorative Lighting", + "children": [], + "url": "https://2023.antflix.net#410.160" + }, + { + "displayTitle": "Part XVI Special Provisions for Horticultural Lighting Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_4_XVI" + }, + { + "body": "Luminaires complying with Parts, I, II, III, IV, V, VI, VII, IX, X, XI, and XII of this article shall be permitted to be used for horticultural lighting. Part XVI shall additionally apply to lighting equipment specifically identified for horticultural use. Informational Note: Lighting equipment identified for horticultural use is designed to provide a spectral characteristic needed for the growth of plants and can also provide supplemental general illumination within the growing environment. [410.170](https://2023.antflix.net#410.170)", + "displayTitle": "410.170 General", + "children": [], + "url": "https://2023.antflix.net#410.170" + }, + { + "body": "Lighting equipment identified for horticultural use shall be listed. [410.172](https://2023.antflix.net#410.172)", + "displayTitle": "410.172 Listing", + "children": [], + "url": "https://2023.antflix.net#410.172" + }, + { + "body": "Lighting equipment identified for horticultural use shall be installed and used in accordance with the manufacturer's installation instructions and installation markings on the equipment as required by that listing. [410.174](https://2023.antflix.net#410.174)", + "displayTitle": "410.174 Installation and Use", + "children": [], + "url": "https://2023.antflix.net#410.174" + }, + { + "displayTitle": "410.176 Locations Not Permitted", + "children": [ + { + "body": "Lighting equipment identified for horticultural use shall not be installed as lighting for general illumination unless such use is indicated in the manufacturer's instructions. [410.176_(A)](https://2023.antflix.net#410.176_(A))", + "displayTitle": "(A) General Lighting", + "children": [], + "url": "https://2023.antflix.net#410.176_(A)" + }, + { + "body": "Lighting equipment identified for horticultural use shall not be installed where it is likely to be subject to physical damage or where concealed. [410.176_(B)](https://2023.antflix.net#410.176_(B))", + "displayTitle": "(B) Installed Location", + "children": [], + "url": "https://2023.antflix.net#410.176_(B)" + } + ], + "url": "https://2023.antflix.net#410.176" + }, + { + "body": "Flexible cord shall only be permitted when provided as part of listed lighting equipment identified for horticultural use for any of the following uses: Connecting a horticultural lighting luminaire directly to a branch circuit outletInterconnecting horticultural lighting luminairesConnecting a horticultural lighting luminaire to a remote power sourceInformational Note: Remote power sources include LED drivers, fluorescent ballasts, or HID ballasts. [410.178](https://2023.antflix.net#410.178)", + "displayTitle": "410.178 Flexible Cord", + "children": [], + "url": "https://2023.antflix.net#410.178" + }, + { + "body": "Fittings and connectors attached to flexible cords shall be provided as part of a listed horticultural lighting equipment device or system and installed in accordance with the instructions provided as part of that listing. [410.180](https://2023.antflix.net#410.180)", + "displayTitle": "410.180 Fittings and Connectors", + "children": [], + "url": "https://2023.antflix.net#410.180" + }, + { + "body": "Lighting equipment identified for horticultural use shall be connected to the equipment grounding conductor in accordance with Part V of this article. [410.182](https://2023.antflix.net#410.182)", + "displayTitle": "410.182 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#410.182" + }, + { + "body": "Lighting equipment identified for horticultural use and employing flexible cord(s) with one or more separable connector(s) or attachment plug(s) shall be supplied by lighting outlets protected by a listed GFCI. Exception: Circuits exceeding 150 volts to ground shall be protected by a listed SPGFCI. Informational Note: See UL 943C, Outline of Investigation for Special Purpose Ground-Fault Circuit-Interrupters, for information on special purpose ground-fault circuit interrupters. [410.184](https://2023.antflix.net#410.184)", + "displayTitle": "410.184 Ground-Fault Circuit-Interrupter (GFCI) Protection and Special Purpose Ground-Fault Circuit-Interrupter (SPGFCI) Protection", + "children": [], + "url": "https://2023.antflix.net#410.184" + }, + { + "body": "Fittings identified for support of horticultural lighting equipment shall be used in accordance with the installation instructions provided and shall be securely fastened. [410.186](https://2023.antflix.net#410.186)", + "displayTitle": "410.186 Support", + "children": [], + "url": "https://2023.antflix.net#410.186" + }, + { + "displayTitle": "Part XVII Special Provisions for Germicidal Irradiation Luminaires", + "children": [], + "url": "https://2023.antflix.net#divider_4_XVII" + }, + { + "displayTitle": "410.190 General", + "children": [], + "url": "https://2023.antflix.net#410.190" + }, + { + "body": "Luminaires intended to emit germicidal irradiation shall be listed and identified as germicidal equipment. [410.191](https://2023.antflix.net#410.191)", + "displayTitle": "410.191 Listing", + "children": [], + "url": "https://2023.antflix.net#410.191" + }, + { + "body": "Luminaires shall be installed in accordance with the manufacturer's instructions and equipment markings. [410.193](https://2023.antflix.net#410.193)", + "displayTitle": "410.193 Installation", + "children": [], + "url": "https://2023.antflix.net#410.193" + }, + { + "displayTitle": "410.195 Locations Not Permitted", + "children": [ + { + "body": "Luminaires shall not be installed as lighting for general illumination unless such use is indicated in the manufacturer's instructions. [410.195_(A)](https://2023.antflix.net#410.195_(A))", + "displayTitle": "(A) General Lighting", + "children": [], + "url": "https://2023.antflix.net#410.195_(A)" + }, + { + "body": "Luminaires shall not be installed where likely to be subject to physical damage. [410.195_(B)](https://2023.antflix.net#410.195_(B))", + "displayTitle": "(B) Installed Location", + "children": [], + "url": "https://2023.antflix.net#410.195_(B)" + }, + { + "body": "Luminaires shall not be installed in a dwelling unless listed and identified for use in dwellings. [410.195_(C)](https://2023.antflix.net#410.195_(C))", + "displayTitle": "(C) Dwellings", + "children": [], + "url": "https://2023.antflix.net#410.195_(C)" + }, + { + "body": "Luminaires installed in a building space that will be occupied during luminaire operation shall not be mounted below the minimum height specified by its listing and installation instructions. [410.195_(D)](https://2023.antflix.net#410.195_(D))", + "displayTitle": "(D) Mounting Height", + "children": [], + "url": "https://2023.antflix.net#410.195_(D)" + } + ], + "url": "https://2023.antflix.net#410.195" + }, + { + "displayTitle": "410.197 Germicidal Irradiation Systems", + "children": [ + { + "body": "A germicidal irradiation system intended to provide a safeguard against UV exposure by ensuring that a building space will not be occupied during luminaire operation shall be listed and identified as a germicidal system. [410.197_(A)](https://2023.antflix.net#410.197_(A))", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#410.197_(A)" + }, + { + "body": "All system components shall be provided by the system manufacturer or clearly specified in the installation instructions as a component that the installer is required to source separately. [410.197_(B)](https://2023.antflix.net#410.197_(B))", + "displayTitle": "(B) System Components", + "children": [], + "url": "https://2023.antflix.net#410.197_(B)" + }, + { + "body": "A germicidal irradiation system shall be installed in accordance with the manufacturer's installation instructions and installation markings. [410.197_(C)](https://2023.antflix.net#410.197_(C))", + "displayTitle": "(C) Installation", + "children": [], + "url": "https://2023.antflix.net#410.197_(C)" + }, + { + "body": "A germicidal irradiation system shall not be installed in a dwelling unless listed and identified for use in dwellings. [410.197_(D)](https://2023.antflix.net#410.197_(D))", + "displayTitle": "(D) Dwellings", + "children": [], + "url": "https://2023.antflix.net#410.197_(D)" + } + ], + "url": "https://2023.antflix.net#410.197" + } + ], + "url": "https://2023.antflix.net#410" + }, + { + "displayTitle": "Article 411 Low-Voltage Lighting", + "children": [ + { + "body": "This article covers low voltage lighting systems and their associated components. [411.1](https://2023.antflix.net#411.1)", + "displayTitle": "411.1 Scope", + "children": [], + "url": "https://2023.antflix.net#411.1" + }, + { + "body": "Listed low-voltage lighting systems or a lighting system assembled from listed parts shall not be reconditioned. [411.2](https://2023.antflix.net#411.2)", + "displayTitle": "411.2 Reconditioned Equipment", + "children": [ + { + "body": "The luminaires, power supply, and luminaire fittings (including the exposed bare conductors) of a low-voltage lighting system shall be listed for use as part of the same identified lighting system. [411.2_(A)](https://2023.antflix.net#411.2_(A))", + "displayTitle": "(A) Listed System", + "children": [], + "url": "https://2023.antflix.net#411.2_(A)" + }, + { + "body": "A lighting system assembled from the following listed parts shall be permitted: Low-voltage luminaires identified for the usePower supply identified for the useLow-voltage luminaire fittings identified for the useSuitably rated cord or cable, or any Chapter 3 wiring method for the secondary circuit [411.2_(B)](https://2023.antflix.net#411.2_(B))", + "displayTitle": "(B) Assembly of Listed Parts", + "children": [], + "url": "https://2023.antflix.net#411.2_(B)" + } + ], + "url": "https://2023.antflix.net#411.2" + }, + { + "body": "The operating voltage of low-voltage lighting systems and their associated components shall not exceed 30 volts ac or 60 volts dc. If wet contact is likely to occur, the operating voltage of low-voltage lighting systems and their associated components shall not exceed 15 volts ac or 30 volts dc. Informational Note: See 680.1 for swimming pools, fountains, and similar installations. [411.3](https://2023.antflix.net#411.3)", + "displayTitle": "411.3 Voltage Limitations", + "children": [], + "url": "https://2023.antflix.net#411.3" + }, + { + "body": "Low voltage lighting systems shall consist of an isolating power supply, low-voltage luminaires, and associated equipment that are all identified for the use. The output circuits of the power supply shall be rated for 25 amperes maximum under all load conditions. [411.4](https://2023.antflix.net#411.4)", + "displayTitle": "411.4 Low-Voltage Lighting Systems", + "children": [], + "url": "https://2023.antflix.net#411.4" + }, + { + "displayTitle": "411.6 Specific Location Requirements", + "children": [ + { + "body": "Conductors concealed or extended through a wall, floor, or ceiling shall be in accordance with one of the following: Installed using any of the wiring methods specified in Chapter 3Installed using wiring supplied by a listed Class 2 power source and installed in accordance with 725.130 [411.6_(A)](https://2023.antflix.net#411.6_(A))", + "displayTitle": "(A) Walls, Floors, and Ceilings", + "children": [], + "url": "https://2023.antflix.net#411.6_(A)" + }, + { + "body": "Lighting systems shall be installed not less than 3 m (10 ft) horizontally from the nearest edge of the water, unless permitted elsewhere in this Code. [411.6_(B)](https://2023.antflix.net#411.6_(B))", + "displayTitle": "(B) Pools, Spas, Fountains, and Similar Locations", + "children": [], + "url": "https://2023.antflix.net#411.6_(B)" + } + ], + "url": "https://2023.antflix.net#411.6" + }, + { + "displayTitle": "411.7 Secondary Circuits", + "children": [ + { + "body": "Secondary circuits shall not be grounded. Exception: Secondary circuits supplied by a Class 2 power source listed and identified as suitable for secondary grounding shall be permitted to be grounded. [411.7_(A)](https://2023.antflix.net#411.7_(A))", + "displayTitle": "(A) Grounding", + "children": [], + "url": "https://2023.antflix.net#411.7_(A)" + }, + { + "body": "The secondary circuit shall be insulated from the branch circuit by an isolating transformer. [411.7_(B)](https://2023.antflix.net#411.7_(B))", + "displayTitle": "(B) Isolation", + "children": [], + "url": "https://2023.antflix.net#411.7_(B)" + }, + { + "body": "Exposed bare conductors and current-carrying parts shall be permitted for indoor installations only. Bare conductors shall not be installed less than 2.1 m (7 ft) above the finished floor, unless specifically listed for a lower installation height. [411.7_(C)](https://2023.antflix.net#411.7_(C))", + "displayTitle": "(C) Bare Conductors", + "children": [], + "url": "https://2023.antflix.net#411.7_(C)" + } + ], + "url": "https://2023.antflix.net#411.7" + }, + { + "body": "Lighting systems covered by this article shall be supplied from a maximum 20-ampere branch circuit. [411.8](https://2023.antflix.net#411.8)", + "displayTitle": "411.8 Branch Circuit", + "children": [], + "url": "https://2023.antflix.net#411.8" + } + ], + "url": "https://2023.antflix.net#411" + }, + { + "displayTitle": "Article 422 Appliances", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_61_I" + }, + { + "body": "This article covers electrical appliances used in any occupancy. [422.1](https://2023.antflix.net#422.1)", + "displayTitle": "422.1 Scope", + "children": [], + "url": "https://2023.antflix.net#422.1" + }, + { + "displayTitle": "422.5 GFCI Protection", + "children": [ + { + "body": "Appliances identified in 422.5(A)(1) through (A)(7) 150 volts or less to ground and 60 amperes or less, single- or 3-phase, shall be provided with Class A protection for personnel. Multiple Class A protective devices shall be permitted but shall not be required. Automotive vacuum machinesDrinking water coolers and bottle fill stationsCord-and-plug-connected high-pressure spray washing machinesTire inflation machinesVending machinesSump pumpsDishwashersInformational Note: Section 210.8 specifies requirements for GFCI protection for the branch-circuit outlet where the covered location warrants such protection. [422.5_(A)](https://2023.antflix.net#422.5_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#422.5_(A)" + }, + { + "body": "The GFCI shall be readily accessible, listed, and located in one or more of the following locations: Within the branch-circuit overcurrent deviceA device or outlet within the supply circuitAn integral part of the attachment plugWithin the supply cord not more than 300 mm (12 in.) from the attachment plugFactory installed within the appliance [422.5_(B)](https://2023.antflix.net#422.5_(B))", + "displayTitle": "(B) Type and Location", + "children": [], + "url": "https://2023.antflix.net#422.5_(B)" + } + ], + "url": "https://2023.antflix.net#422.5" + }, + { + "body": "All appliances supplied by 50 volts or higher shall be listed. [422.6](https://2023.antflix.net#422.6)", + "displayTitle": "422.6 Listing Required", + "children": [], + "url": "https://2023.antflix.net#422.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_61_II" + }, + { + "body": "Branch circuits supplying appliances shall comply with 422.10(A) or (B). [422.10](https://2023.antflix.net#422.10)", + "displayTitle": "422.10 Branch Circuits", + "children": [ + { + "body": "Individual branch circuits supplying appliances shall comply with the following as applicable: The ampacities of branch-circuit conductors shall not be less than the marked rating of the appliance or the marked rating of an appliance having combined loads.The ampacities of branch-circuit conductors for motor-operated appliances not having a marked rating shall be in accordance with Part II of Article 430.The branch-circuit rating for an appliance that is a continuous load, other than a motor-operated appliance, shall not be less than 125 percent of the marked rating, or not less than 100 percent of the marked rating if the branch-circuit device and its assembly are listed for continuous loading at 100 percent of its rating.Branch circuits and branch-circuit conductors for household ranges and cooking appliances shall be permitted to be in accordance with Table 220.55 and shall be sized in accordance with 210.19(C). [422.10_(A)](https://2023.antflix.net#422.10_(A))", + "displayTitle": "(A) Individual Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#422.10_(A)" + }, + { + "body": "For branch circuits supplying appliances and other loads, the rating shall be determined in accordance with 210.23. [422.10_(B)](https://2023.antflix.net#422.10_(B))", + "displayTitle": "(B) Branch Circuits Supplying Two or More Loads", + "children": [], + "url": "https://2023.antflix.net#422.10_(B)" + } + ], + "url": "https://2023.antflix.net#422.10" + }, + { + "body": "Appliances shall be protected against overcurrent in accordance with 422.11(A) through (G) and 422.10. [422.11](https://2023.antflix.net#422.11)", + "displayTitle": "422.11 Overcurrent Protection", + "children": [ + { + "body": "Branch circuits shall be protected in accordance with 240.4. If a protective device rating is marked on an appliance, the branch-circuit overcurrent device rating shall not exceed the protective device rating marked on the appliance. [422.11_(A)](https://2023.antflix.net#422.11_(A))", + "displayTitle": "(A) Branch-Circuit Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#422.11_(A)" + }, + { + "body": "Household-type appliances with surface heating elements having a maximum demand of more than 60 amperes calculated in accordance with Table 220.55 shall have their power supply subdivided into two or more circuits, each of which shall be provided with overcurrent protection rated at not over 50 amperes. [422.11_(B)](https://2023.antflix.net#422.11_(B))", + "displayTitle": "(B) Household-Type Appliances With Surface Heating Elements", + "children": [], + "url": "https://2023.antflix.net#422.11_(B)" + }, + { + "body": "Infrared lamp commercial and industrial heating appliances shall have overcurrent protection not exceeding 50 amperes. [422.11_(C)](https://2023.antflix.net#422.11_(C))", + "displayTitle": "(C) Infrared Lamp Commercial and Industrial Heating Appliances", + "children": [], + "url": "https://2023.antflix.net#422.11_(C)" + }, + { + "body": "Open-coil or exposed sheathed-coil types of surface heating elements in commercial-type heating appliances shall be protected by overcurrent protective devices rated at not over 50 amperes. [422.11_(D)](https://2023.antflix.net#422.11_(D))", + "displayTitle": "(D) Open-Coil or Exposed Sheathed-Coil Types of Surface Heating Elements in Commercial-Type Heating Appliances", + "children": [], + "url": "https://2023.antflix.net#422.11_(D)" + }, + { + "body": "If the branch circuit supplies a single non-motor-operated appliance, the rating of overcurrent protection shall comply with the following: Not exceed the overcurrent protection rating marked on the appliance.Not exceed 20 amperes if the overcurrent protection rating is not marked and the appliance is rated 13.3 amperes or less.Not exceed 150 percent of the appliance rated current if the overcurrent protection rating is not marked and the appliance is rated over 13.3 amperes. Where 150 percent of the appliance rating does not correspond to a standard overcurrent device ampere rating, the next higher standard rating shall be permitted. [422.11_(E)](https://2023.antflix.net#422.11_(E))", + "displayTitle": "(E) Single Non-Motor-Operated Appliance", + "children": [], + "url": "https://2023.antflix.net#422.11_(E)" + }, + { + "displayTitle": "(F) Electric Heating Appliances Employing Resistance-Type Heating Elements Rated More Than 48 Amperes", + "children": [ + { + "body": "Electric heating appliances employing resistance-type heating elements rated more than 48 amperes, other than household appliances with surface heating elements covered by 422.11(B), and commercial-type heating appliances covered by 422.11(D), shall have the heating elements subdivided. Each subdivided load shall not exceed 48 amperes, and each subdivided load shall be protected at not more than 60 amperes. These supplementary overcurrent protective devices shall be (1) factory-installed within or on the heater enclosure or provided as a separate assembly by the heater manufacturer; (2) accessible; and (3) suitable for branch-circuit protection. The main conductors supplying these overcurrent protective devices shall be considered branch-circuit conductors. [422.11_(F)_(1)](https://2023.antflix.net#422.11_(F)_(1))", + "displayTitle": "(1) Electric Heating Appliances", + "children": [], + "url": "https://2023.antflix.net#422.11_(F)_(1)" + }, + { + "body": "Commercial kitchen and cooking appliances using sheathed-type heating elements not covered in 422.11 (D) shall be permitted to be subdivided into circuits not exceeding 120 amperes and protected at not more than 150 amperes where one of the following is met: Elements are integral with and enclosed within a cooking surface.Elements are completely contained within an enclosure identified as suitable for this use.Elements are contained within an ASME-rated and stamped vessel. [422.11_(F)_(2)](https://2023.antflix.net#422.11_(F)_(2))", + "displayTitle": "(2) Commercial Kitchen and Cooking Appliances", + "children": [], + "url": "https://2023.antflix.net#422.11_(F)_(2)" + }, + { + "body": "Resistance-type immersion electric heating elements shall be permitted to be subdivided into circuits not exceeding 120 amperes and protected at not more than 150 amperes as follows: Where contained in ASME-rated and stamped vesselsWhere included in listed instantaneous water heatersWhere installed in low-pressure water heater tanks or open-outlet water heater vesselsInformational Note: See IEC 60335-2-21, Household and similar electrical appliances - Safety - Particular requirements for storage water heaters, for information on low-pressure and open-outlet heaters are atmospheric pressure water heaters [422.11_(F)_(3)](https://2023.antflix.net#422.11_(F)_(3))", + "displayTitle": "(3) Water Heaters and Steam Boilers", + "children": [], + "url": "https://2023.antflix.net#422.11_(F)_(3)" + } + ], + "url": "https://2023.antflix.net#422.11_(F)" + }, + { + "body": "Motors of motor-operated appliances shall be provided with overload protection in accordance with Part III of Article 430. Hermetic refrigerant motor-compressors in air-conditioning or refrigerating equipment shall be provided with overload protection in accordance with Part VI of Article 440. Where appliance overcurrent protective devices that are separate from the appliance are required, data for selection of these devices shall be marked on the appliance. The minimum marking shall be that specified in 430.7 and 440.4. [422.11_(G)](https://2023.antflix.net#422.11_(G))", + "displayTitle": "(G) Motor-Operated Appliances", + "children": [], + "url": "https://2023.antflix.net#422.11_(G)" + } + ], + "url": "https://2023.antflix.net#422.11" + }, + { + "body": "Central heating equipment other than fixed electric space-heating equipment shall be supplied by an individual branch circuit. Exception No. 1: Auxiliary equipment, such as a pump, valve, humidifier, or electrostatic air cleaner directly associated with the heating equipment, shall be permitted to be connected to the same branch circuit. Exception No. 2: Permanently connected air-conditioning equipment shall be permitted to be connected to the same branch circuit. [422.12](https://2023.antflix.net#422.12)", + "displayTitle": "422.12 Central Heating Equipment", + "children": [], + "url": "https://2023.antflix.net#422.12" + }, + { + "body": "The branch-circuit over-current device and conductors for fixed storage-type water heaters that have a capacity of 450 L (120 gal) or less shall have an ampere rating of not less than 125 percent of the ampere rating of the water heater. Informational Note: See 422.10 for branch-circuit rating. [422.13](https://2023.antflix.net#422.13)", + "displayTitle": "422.13 Storage-Type Water Heaters", + "children": [], + "url": "https://2023.antflix.net#422.13" + }, + { + "displayTitle": "422.16 Flexible Cords", + "children": [ + { + "body": "Flexible cord shall be permitted as follows: To connect appliances to facilitate their frequent interchange or to prevent the transmission of noise or vibration.To facilitate the removal or disconnection of appliances that are fastened in place, where the fastening means and mechanical connections are specifically designed to permit ready removal for maintenance or repair and the appliance is intended or identified for flexible cord connection.All cord-and-plug-connected electrically heated appliances that produce temperatures in excess of 121\u00b0C (250\u00b0F) on surfaces with which the cord is likely to be in contact shall be provided with one of the types of heater cords listed in Table 400.4. [422.16_(A)](https://2023.antflix.net#422.16_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#422.16_(A)" + }, + { + "displayTitle": "(B) Specific Appliances", + "children": [ + { + "body": "Electrically operated in-sink waste disposers shall be permitted to be cord-and-plug-connected with a flexible cord identified as suitable in the installation instructions of the appliance manufacturer where all of the following conditions are met: The length of the cord is not less than 450 mm (18 in.) and not exceeding 900 mm (36 in.).Receptacles are located to protect against physical damage to the flexible cord.The receptacle is accessible.The flexible cord has an equipment grounding conductor and is terminated with a grounding-type attachment plug.Exception: A listed appliance distinctly marked to identify it as protected by a system of double insulation shall not be required to be terminated with a grounding-type attachment plug. [422.16_(B)_(1)](https://2023.antflix.net#422.16_(B)_(1))", + "displayTitle": "(1) Electrically Operated In-Sink Waste Disposers", + "children": [], + "url": "https://2023.antflix.net#422.16_(B)_(1)" + }, + { + "body": "Built-in dish-washers and trash compactors shall be permitted to be cord-and-plug-connected with a flexible cord identified as suitable for the purpose in the installation instructions of the appliance manufacturer where all of the following conditions are met: For a trash compactor, the length of the cord is not less than 0.9 m (3 ft) and not exceeding 1.2 m (4 ft) measured from the face of the attachment plug to the plane of the rear of the appliance.For a built-in dishwasher, the length of the cord is not less than 0.9 m (3 ft) and not exceeding 2.0 m (6.5 ft) measured from the face of the attachment plug to the plane of the rear of the appliance.Receptacles are located to protect against physical damage to the flexible cord.The receptacle for a trash compactor is located in the space occupied by the appliance or adjacent thereto. If a flexible cord passes through an opening, it shall be protected against damage by a bushing, grommet, smoothed edge, or other approved means.The receptacle for a built-in dishwasher is located in the space adjacent to the space occupied by the dishwasher. If a flexible cord passes through an opening, it shall be protected against damage by a bushing, grommet, smoothed edge, or other approved means.The receptacle is accessible.The flexible cord has an equipment grounding conductor that is terminated with a grounding-type attachment plug.Exception: A listed appliance distinctly marked to identify it as protected by a system of double insulation shall not be required to be terminated with a grounding-type attachment plug. [422.16_(B)_(2)](https://2023.antflix.net#422.16_(B)_(2))", + "displayTitle": "(2) Built-In Dishwashers and Trash Compactors", + "children": [], + "url": "https://2023.antflix.net#422.16_(B)_(2)" + }, + { + "body": "Wall-mounted ovens and counter-mounted cooking units complete with provisions for mounting and for making electrical connections shall be permitted to be permanently connected or cord-and-plug-connected with a flexible cord identified as suitable for the purpose in the installation instructions of the appliance manufacturer. A separable connector or a plug and receptacle combination in the supply line to an oven or cooking unit shall be identified for the temperature of the space in which it is located. [422.16_(B)_(3)](https://2023.antflix.net#422.16_(B)_(3))", + "displayTitle": "(3) Wall-Mounted Ovens and Counter-Mounted Cooking Units", + "children": [], + "url": "https://2023.antflix.net#422.16_(B)_(3)" + }, + { + "body": "Range hoods and over-the-range microwave ovens with integral range hoods shall be permitted to be cord-and-plug-connected with a flexible cord identified as suitable for use on range hoods in the installation instructions of the appliance manufacturer, where all of the following conditions are met: The length of the cord is not less than 450 mm (18 in.) and not exceeding 1.2 m (4 ft).Receptacles are located to protect against physical damage to the flexible cord.The receptacle is supplied by an individual branch circuit.The receptacle is accessible.The flexible cord has an equipment grounding conductor and is terminated with a grounding-type attachment plug.Exception: A listed appliance distinctly marked to identify it as protected by a system of double insulation shall not be required to be terminated with a grounding-type attachment plug. [422.16_(B)_(4)](https://2023.antflix.net#422.16_(B)_(4))", + "displayTitle": "(4) Range Hoods and Microwave Oven/Range Hood Combinations", + "children": [], + "url": "https://2023.antflix.net#422.16_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#422.16_(B)" + } + ], + "url": "https://2023.antflix.net#422.16" + }, + { + "body": "Each electrically heated appliance that is intended by size, weight, and service to be located in a fixed position shall be placed so as to provide protection between the appliance and adjacent combustible material. [422.17](https://2023.antflix.net#422.17)", + "displayTitle": "422.17 Protection of Combustible Material", + "children": [], + "url": "https://2023.antflix.net#422.17" + }, + { + "displayTitle": "422.18 Ceiling-Suspended (Paddle) Fans", + "children": [ + { + "body": "Ceiling-suspended (paddle) fans shall be supported independently of an outlet box or by one of the following: A listed outlet box or listed outlet box system identified for fan support installed in accordance with 314.27(C)A listed outlet box system, a listed weight-supporting ceiling receptacle, and a compatible factory-installed weight-supporting attachment fitting that is installed in accordance with 314.27(E) [422.18_(A)](https://2023.antflix.net#422.18_(A))", + "displayTitle": "(A) Support", + "children": [], + "url": "https://2023.antflix.net#422.18_(A)" + }, + { + "body": "No metal parts of ceiling-suspended (paddle) fans in bathrooms and shower spaces shall be located within a zone measured 900 mm (3 ft) horizontally and 2.5 m (8 ft) vertically from the top of the bathtub rim or shower stall threshold. This zone is all-encompassing and shall include the space directly over the tub or shower stall. [422.18_(B)](https://2023.antflix.net#422.18_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#422.18_(B)" + } + ], + "url": "https://2023.antflix.net#422.18" + }, + { + "body": "The combined volume of the canopy of ceiling-suspended (paddle) fans and outlet box shall provide sufficient space so that conductors and their connecting devices are capable of being installed in accordance with 314.16. [422.19](https://2023.antflix.net#422.19)", + "displayTitle": "422.19 Space for Conductors", + "children": [], + "url": "https://2023.antflix.net#422.19" + }, + { + "body": "In a completed installation, each outlet box shall be provided with a cover unless covered by means of a ceiling-suspended (paddle) fan canopy. [422.20](https://2023.antflix.net#422.20)", + "displayTitle": "422.20 Outlet Boxes to Be Covered", + "children": [], + "url": "https://2023.antflix.net#422.20" + }, + { + "body": "Any combustible ceiling finish that is exposed between the edge of a ceiling-suspended (paddle) fan canopy or pan and an outlet box and that has a surface area of 1160 mm2 (180 in.2) or more shall be covered with noncombustible material. [422.21](https://2023.antflix.net#422.21)", + "displayTitle": "422.21 Covering of Combustible Material at Outlet Boxes", + "children": [], + "url": "https://2023.antflix.net#422.21" + }, + { + "body": "Appliances shall be permitted to use listed weight-supporting ceiling receptacles in combination with compatible weight-supporting attachment fittings used within their ratings and used in accordance with 314.27(E). [422.22](https://2023.antflix.net#422.22)", + "displayTitle": "422.22 Utilizing Separable Attachment Fittings", + "children": [], + "url": "https://2023.antflix.net#422.22" + }, + { + "displayTitle": "Part III Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#divider_53_III" + }, + { + "body": "A means shall be provided to simultaneously disconnect each appliance from all ungrounded conductors in accordance with the following sections of Part III. If an appliance is supplied by more than one branch circuit or feeder, these disconnecting means shall be grouped and identified as being the multiple disconnecting means for the appliance. Each disconnecting means shall simultaneously disconnect all ungrounded conductors that it controls. [422.30](https://2023.antflix.net#422.30)", + "displayTitle": "422.30 General", + "children": [], + "url": "https://2023.antflix.net#422.30" + }, + { + "body": "For appliances that do not have a disconnecting means in accordance with 422.33 or 422.34, a disconnecting means shall be provided in accordance with 422.31(A), (B), or (C). [422.31](https://2023.antflix.net#422.31)", + "displayTitle": "422.31 Disconnection of Permanently Connected Appliances", + "children": [ + { + "body": "For permanently connected appliances rated at not over 300 voltamperes or 1/8 hp, the branch-circuit overcurrent device shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the appliance or be capable of being locked in the open position in compliance with 110.25. [422.31_(A)](https://2023.antflix.net#422.31_(A))", + "displayTitle": "(A) Rated at Not over 300 Volt-Amperes or 1/8 Horsepower", + "children": [], + "url": "https://2023.antflix.net#422.31_(A)" + }, + { + "body": "For permanently connected appliances rated over 300 volt-amperes, the branch-circuit switch or circuit breaker shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the appliance or be capable of being locked in the open position in compliance with 110.25. Informational Note: See 422.34 for appliances employing unit switches. [422.31_(B)](https://2023.antflix.net#422.31_(B))", + "displayTitle": "(B) Appliances Rated Over 300 Volt-Amperes", + "children": [], + "url": "https://2023.antflix.net#422.31_(B)" + }, + { + "body": "The disconnecting means shall comply with 430.109 and 430.110. For permanently connected motor-operated appliances with motors rated over 1/8 hp, the disconnecting means shall be within sight from the appliance or be capable of being locked in the open position in compliance with 110.25. Exception: If an appliance is provided with a unit switch that complies with 422.34(A), (B), or (C), the switch or circuit breaker serving as the other disconnecting means shall be permitted to be out of sight from the appliance. [422.31_(C)](https://2023.antflix.net#422.31_(C))", + "displayTitle": "(C) Motor-Operated Appliances Rated over 1/8 Horsepower", + "children": [], + "url": "https://2023.antflix.net#422.31_(C)" + } + ], + "url": "https://2023.antflix.net#422.31" + }, + { + "displayTitle": "422.33 Disconnection of Cord-and-Plug-Connected or Attachment Fitting-Connected Appliances", + "children": [ + { + "body": "For cord-and-plug- (or attachment fitting\u2014) connected appliances, an accessible separable connector or an accessible plug (or attachment fitting) and receptacle combination shall be permitted to serve as the disconnecting means. The attachment fitting shall be a factory installed part of the appliance and suitable for disconnection of the appliance. Where the separable connector or plug (or attachment fitting) and receptacle combination are not accessible, cord-and-plug-connected or attachment fitting-and-plug-connected appliances shall be provided with disconnecting means in accordance with 422.31. [422.33_(A)](https://2023.antflix.net#422.33_(A))", + "displayTitle": "(A) Separable Connector or an Attachment Plug (or Attachment Fitting) and Receptacle", + "children": [], + "url": "https://2023.antflix.net#422.33_(A)" + }, + { + "body": "For cord-and-plug-connected household electric ranges, an attachment plug and receptacle connection at the rear base of a range, accessible from the front by removal of a drawer, shall be permitted. [422.33_(B)](https://2023.antflix.net#422.33_(B))", + "displayTitle": "(B) Connection at the Rear Base of a Range", + "children": [], + "url": "https://2023.antflix.net#422.33_(B)" + }, + { + "body": "The rating of a receptacle or of a separable connector shall not be less than the rating of any appliance connected thereto. Exception: Demand factors authorized elsewhere in this Code shall be permitted to be applied to the rating of a receptacle or of a separable connector. [422.33_(C)](https://2023.antflix.net#422.33_(C))", + "displayTitle": "(C) Rating", + "children": [], + "url": "https://2023.antflix.net#422.33_(C)" + } + ], + "url": "https://2023.antflix.net#422.33" + }, + { + "body": "A unit switch(es) with a marked-off position that is a part of an appliance and disconnects all ungrounded conductors shall be permitted as the disconnecting means required by this article where other means for disconnection are provided in occupancies specified in 422.34(A) through (D). [422.34](https://2023.antflix.net#422.34)", + "displayTitle": "422.34 Unit Switch(es) as Disconnecting Means", + "children": [ + { + "body": "In multifamily dwellings, the other disconnecting means shall be within the dwelling unit, or on the same floor as the dwelling unit in which the appliance is installed, and shall be permitted to control lamps and other appliances. [422.34_(A)](https://2023.antflix.net#422.34_(A))", + "displayTitle": "(A) Multifamily Dwellings", + "children": [], + "url": "https://2023.antflix.net#422.34_(A)" + }, + { + "body": "In two-family dwellings, the other disconnecting means shall be permitted either inside or outside of the dwelling unit in which the appliance is installed. In this case, an individual switch or circuit breaker for the dwelling unit shall be permitted and shall also be permitted to control lamps and other appliances. [422.34_(B)](https://2023.antflix.net#422.34_(B))", + "displayTitle": "(B) Two-Family Dwellings", + "children": [], + "url": "https://2023.antflix.net#422.34_(B)" + }, + { + "body": "In one-family dwellings, the service disconnecting means shall be permitted to be the other disconnecting means. [422.34_(C)](https://2023.antflix.net#422.34_(C))", + "displayTitle": "(C) One-Family Dwellings", + "children": [], + "url": "https://2023.antflix.net#422.34_(C)" + }, + { + "body": "In other occupancies, the branch-circuit switch or circuit breaker, where readily accessible for servicing of the appliance, shall be permitted as the other disconnecting means. [422.34_(D)](https://2023.antflix.net#422.34_(D))", + "displayTitle": "(D) Other Occupancies", + "children": [], + "url": "https://2023.antflix.net#422.34_(D)" + } + ], + "url": "https://2023.antflix.net#422.34" + }, + { + "body": "Switches and circuit breakers used as disconnecting means shall be of the indicating type. [422.35](https://2023.antflix.net#422.35)", + "displayTitle": "422.35 Switch and Circuit Breaker to Be Indicating", + "children": [], + "url": "https://2023.antflix.net#422.35" + }, + { + "displayTitle": "Part IV Construction", + "children": [], + "url": "https://2023.antflix.net#divider_12_IV" + }, + { + "body": "If the appliance is provided with a manually operated, line-connected, single-pole switch for appliance on-off operation, an Edison-base lampholder, or a 15- or 20-ampere receptacle, the attachment plug shall be of the polarized or grounding type. A 2-wire, nonpolarized attachment plug shall be permitted to be used on a listed double-insulated shaver. Informational Note: See 410.82 for polarity of Edison-base lampholders. [422.40](https://2023.antflix.net#422.40)", + "displayTitle": "422.40 Polarity in Cord-and-Plug-Connected Appliances", + "children": [], + "url": "https://2023.antflix.net#422.40" + }, + { + "body": "Cord-and-plug-connected portable, freestanding hydromassage units and hand-held hair dryers shall be constructed to provide protection for personnel against electrocution when immersed. [422.41](https://2023.antflix.net#422.41)", + "displayTitle": "422.41 Cord-and-Plug-Connected Appliances Subject to Immersion", + "children": [], + "url": "https://2023.antflix.net#422.41" + }, + { + "body": "In other than dwelling-type occupancies, each electrically heated appliance or group of appliances intended to be applied to combustible material shall be provided with a signal or an integral temperature-limiting device. [422.42](https://2023.antflix.net#422.42)", + "displayTitle": "422.42 Signals for Heated Appliances", + "children": [], + "url": "https://2023.antflix.net#422.42" + }, + { + "body": "Electric heaters of the cord-and-plug-connected immersion type shall be constructed and installed so that current-carrying parts are effectively insulated from electrical contact with the substance in which they are immersed. [422.44](https://2023.antflix.net#422.44)", + "displayTitle": "422.44 Cord-and-Plug-Connected Immersion Heaters", + "children": [], + "url": "https://2023.antflix.net#422.44" + }, + { + "body": "Each smoothing iron and other cord-and-plug-connected electrically heated appliance intended to be applied to combustible material shall be equipped with an approved stand, which shall be permitted to be a separate piece of equipment or a part of the appliance. [422.45](https://2023.antflix.net#422.45)", + "displayTitle": "422.45 Stands for Cord-and-Plug-Connected Appliances", + "children": [], + "url": "https://2023.antflix.net#422.45" + }, + { + "body": "All storage or instantaneous-type water heaters shall be equipped with a temperature-limiting means in addition to its control thermostat to disconnect all ungrounded conductors. Such means shall comply with both of the following: Installed to sense maximum water temperature.Be either a trip-free, manually reset type or a type having a replacement element.Exception No. 1: Storage water heaters that are identified as being suitable for use with a supply water temperature of 82\u00b0C (180\u00b0F) or above and a capacity of 60 kW or above.Exception No. 2: Instantaneous-type water heaters that are identified as being suitable for such use, with a capacity of 4 L (1 gal) or less. [422.47](https://2023.antflix.net#422.47)", + "displayTitle": "422.47 Water Heater Controls", + "children": [], + "url": "https://2023.antflix.net#422.47" + }, + { + "displayTitle": "422.48 Infrared Lamp Industrial Heating Appliances", + "children": [ + { + "body": "Infrared heating lamps rated at 300 watts or less shall be permitted with lampholders of the medium-base, unswitched porcelain type or other types identified as suitable for use with infrared heating lamps rated 300 watts or less. [422.48_(A)](https://2023.antflix.net#422.48_(A))", + "displayTitle": "(A) 300 Watts or Less", + "children": [], + "url": "https://2023.antflix.net#422.48_(A)" + }, + { + "body": "Screw shell lampholders shall not be used with infrared lamps rated over 300 watts, unless the lampholders are identified as being suitable for use with infrared heating lamps rated over 300 watts. [422.48_(B)](https://2023.antflix.net#422.48_(B))", + "displayTitle": "(B) Over 300 Watts", + "children": [], + "url": "https://2023.antflix.net#422.48_(B)" + } + ], + "url": "https://2023.antflix.net#422.48" + }, + { + "displayTitle": "Part V Marking", + "children": [], + "url": "https://2023.antflix.net#divider_7_V" + }, + { + "displayTitle": "422.60 Nameplate", + "children": [ + { + "body": "Each electrical appliance shall be provided with a nameplate giving the identifying name and the rating in volts and amperes, or in volts and watts. If the appliance is to be used on a specific frequency or frequencies, it shall be so marked. Where motor overload protection external to the appliance is required, the appliance shall be so marked. Informational Note: See 422.11 for overcurrent protection requirements. [422.60_(A)](https://2023.antflix.net#422.60_(A))", + "displayTitle": "(A) Nameplate Marking", + "children": [], + "url": "https://2023.antflix.net#422.60_(A)" + }, + { + "body": "Marking shall be located so as to be visible or easily accessible after installation. [422.60_(B)](https://2023.antflix.net#422.60_(B))", + "displayTitle": "(B) To Be Visible", + "children": [], + "url": "https://2023.antflix.net#422.60_(B)" + } + ], + "url": "https://2023.antflix.net#422.60" + }, + { + "body": "All heating elements that are rated over one ampere, replaceable in the field, and a part of an appliance shall be legibly marked with the ratings in volts and amperes, or in volts and watts, or with the manufacturer's part number. [422.61](https://2023.antflix.net#422.61)", + "displayTitle": "422.61 Marking of Heating Elements", + "children": [], + "url": "https://2023.antflix.net#422.61" + }, + { + "displayTitle": "422.62 Appliances Consisting of Motors and Other Loads", + "children": [ + { + "body": "Where a motor-operated appliance nameplate includes a horsepower rating, that rating shall not be less than the horsepower rating on the motor nameplate. Where an appliance consists of multiple motors, or one or more motors and other loads, the nameplate value shall not be less than the equivalent horsepower of the combined loads, calculated in accordance with 430.110(C)(1). [422.62_(A)](https://2023.antflix.net#422.62_(A))", + "displayTitle": "(A) Nameplate Horsepower Markings", + "children": [], + "url": "https://2023.antflix.net#422.62_(A)" + }, + { + "body": "Appliances, other than those factory-equipped with cords and attachment plugs and with nameplates in compliance with 422.60, shall be marked in accordance with 422.62(B)(1) or (B)(2). [422.62_(B)](https://2023.antflix.net#422.62_(B))", + "displayTitle": "(B) Additional Nameplate Markings", + "children": [ + { + "body": "In addition to the marking required in 422.60, the marking on an appliance consisting of a motor with other load(s) or motors with or without other load(s) shall specify the minimum supply circuit conductor ampacity and the maximum rating of the circuit overcurrent protective device. This requirement shall not apply to an appliance with a nameplate in compliance with 422.60 where both the minimum supply circuit conductor ampacity and maximum rating of the circuit overcurrent protective device are not more than 15 amperes. [422.62_(B)_(1)](https://2023.antflix.net#422.62_(B)_(1))", + "displayTitle": "(1) Marking", + "children": [], + "url": "https://2023.antflix.net#422.62_(B)_(1)" + }, + { + "body": "An alternate marking method shall be permitted to specify the rating of the largest motor in volts and amperes, and the additional load(s) in volts and amperes, or volts and watts in addition to the marking required in 422.60. The ampere rating of a motor 1/8 horsepower or less or a nonmotor load 1 ampere or less shall be permitted to be omitted unless such loads constitute the principal load. [422.62_(B)_(2)](https://2023.antflix.net#422.62_(B)_(2))", + "displayTitle": "(2) Alternate Marking Method", + "children": [], + "url": "https://2023.antflix.net#422.62_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#422.62_(B)" + } + ], + "url": "https://2023.antflix.net#422.62" + } + ], + "url": "https://2023.antflix.net#422" + }, + { + "displayTitle": "Article 424 Fixed Electric Space-Heating Equipment", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_62_I" + }, + { + "body": "This article covers fixed electric equipment used for space heating. For the purpose of this article, heating equipment includes heating cables, unit heaters, boilers, central heating systems, or other fixed electric space-heating equipment. This article does not apply to process heating and room air conditioning. [424.1](https://2023.antflix.net#424.1)", + "displayTitle": "424.1 Scope", + "children": [], + "url": "https://2023.antflix.net#424.1" + }, + { + "body": "Fixed electric space-heating equipment incorporating a hermetic refrigerant motor-compressor shall additionally comply with Table 424.3 unless amended by this article.Table 424.3 Other Articles Equipment Article Air-conditioning and refrigerating equipment 440 (Parts I, II, III, IV, V, VI) [424.3](https://2023.antflix.net#424.3)", + "displayTitle": "424.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#424.3" + }, + { + "displayTitle": "424.4 Branch Circuits", + "children": [ + { + "body": "An individual branch circuit shall be permitted to supply any volt-ampere or wattage rating of fixed electric space-heating equipment for which the branch circuit is rated. Branch circuits supplying two or more outlets for fixed electric space-heating equipment shall be rated not over 30 amperes. In other than a dwelling unit, fixed infrared heating equipment shall be permitted to be supplied from branch circuits rated not over 50 amperes. [424.4_(A)](https://2023.antflix.net#424.4_(A))", + "displayTitle": "(A) Branch-Circuit Requirements", + "children": [], + "url": "https://2023.antflix.net#424.4_(A)" + }, + { + "body": "The branch-circuit conductor(s) ampacity shall not be less than 125 percent of the load of the fixed electric space-heating equipment and any associated motor(s). [424.4_(B)](https://2023.antflix.net#424.4_(B))", + "displayTitle": "(B) Branch-Circuit Conductor Sizing", + "children": [], + "url": "https://2023.antflix.net#424.4_(B)" + } + ], + "url": "https://2023.antflix.net#424.4" + }, + { + "body": "Electric baseboard heaters, heating cables, duct heaters, and radiant heating systems shall be listed and labeled. [424.6](https://2023.antflix.net#424.6)", + "displayTitle": "424.6 Listed Equipment", + "children": [], + "url": "https://2023.antflix.net#424.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_62_II" + }, + { + "body": "Factory-installed receptacle outlets that are part of a permanently installed electric baseboard heater, or outlets provided as a separate listed assembly of an electric baseboard heater, shall be permitted in lieu of a receptacle outlet(s) that is required by 210.52. Such receptacle outlets shall not be connected to the baseboard heater circuits. Informational Note: Listed baseboard heaters include instructions that may not permit their installation below receptacle outlets. [424.10](https://2023.antflix.net#424.10)", + "displayTitle": "424.10 General", + "children": [], + "url": "https://2023.antflix.net#424.10" + }, + { + "body": "Fixed electric space-heating equipment requiring supply conductors with an insulation rating greater than 60\u00b0C shall be clearly and permanently marked. This marking shall be plainly visible after installation and shall be permitted to be adjacent to the field connection box. [424.11](https://2023.antflix.net#424.11)", + "displayTitle": "424.11 Supply Conductors", + "children": [], + "url": "https://2023.antflix.net#424.11" + }, + { + "displayTitle": "424.12 Locations", + "children": [ + { + "body": "Where subject to physical damage, fixed electric space-heating equipment shall be protected in an approved manner. [424.12_(A)](https://2023.antflix.net#424.12_(A))", + "displayTitle": "(A) Exposed to Physical Damage", + "children": [], + "url": "https://2023.antflix.net#424.12_(A)" + }, + { + "body": "Heaters and related equipment installed in damp or wet locations shall be listed for such locations. Informational Note No. 1: See 110.11 for equipment exposed to deteriorating agents. Informational Note No. 2: See 680.27(C) for pool deck areas. [424.12_(B)](https://2023.antflix.net#424.12_(B))", + "displayTitle": "(B) Damp or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#424.12_(B)" + } + ], + "url": "https://2023.antflix.net#424.12" + }, + { + "body": "Fixed electric space-heating equipment shall be installed to provide the required spacing between the equipment and adjacent combustible material, unless it is listed to be installed in direct contact with combustible material. [424.13](https://2023.antflix.net#424.13)", + "displayTitle": "424.13 Spacing From Combustible Materials", + "children": [], + "url": "https://2023.antflix.net#424.13" + }, + { + "displayTitle": "Part III Control and Protection of Fixed Electric Space-Heating Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_54_III" + }, + { + "body": "Means shall be provided to simultaneously disconnect the heater, motor controller(s), and supplementary overcurrent protective device(s) of all fixed electric space-heating equipment from all ungrounded conductors. Where heating equipment is supplied by more than one source, feeder, or branch circuit, the disconnecting means shall be grouped and identified as having multiple disconnecting means. Each disconnecting means shall simultaneously disconnect all ungrounded conductors that it controls. The disconnecting means specified in 424.19(A) and (B) shall have an ampere rating not less than 125 percent of the total load of the motors and the heaters and shall be capable of being locked in the open position in compliance with 110.25. [424.19](https://2023.antflix.net#424.19)", + "displayTitle": "424.19 Disconnecting Means", + "children": [ + { + "body": "The disconnecting means for fixed electric space-heating equipment with supplementary overcurrent protection shall be within sight from the supplementary overcurrent protective device(s), on the supply side of these devices, if fuses, and, in addition, shall comply with either 424.19(A)(1) or (A)(2). [424.19_(A)](https://2023.antflix.net#424.19_(A))", + "displayTitle": "(A) Heating Equipment With Supplementary Overcurrent Protection", + "children": [ + { + "body": "The disconnecting means provided shall be within sight from the motor controller(s) and the heater, or shall be lockable as specified in 424.19, or shall be a unit switch complying with 424.19(C). [424.19_(A)_(1)](https://2023.antflix.net#424.19_(A)_(1))", + "displayTitle": "(1) Heater Containing No Motor Rated over 1/8 Horsepower", + "children": [], + "url": "https://2023.antflix.net#424.19_(A)_(1)" + }, + { + "body": "The disconnecting means required by 424.19 shall be permitted to serve as the required disconnecting means for both the motor controller(s) and heater under either of the following conditions: Where the disconnecting means is in sight from the motor controller(s) and the heater and complies with Part IX of Article 430.Where a motor(s) of more than 1/8 hp and the heater are provided with a single unit switch that complies with 422.34(A), (B), (C), or (D), the disconnecting means shall be permitted to be out of sight from the motor controller. [424.19_(A)_(2)](https://2023.antflix.net#424.19_(A)_(2))", + "displayTitle": "(2) Heater Containing a Motor(s) Rated over 1/8 Horsepower", + "children": [], + "url": "https://2023.antflix.net#424.19_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#424.19_(A)" + }, + { + "displayTitle": "(B) Heating Equipment Without Supplementary Overcurrent Protection", + "children": [ + { + "body": "For fixed electric space-heating equipment without a motor rated over 1/8 hp, the branch-circuit switch or circuit breaker shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the heater or is capable of being locked in the open position in compliance with 110.25. [424.19_(B)_(1)](https://2023.antflix.net#424.19_(B)_(1))", + "displayTitle": "(1) Without Motor or with Motor Not over 1/8 Horsepower", + "children": [], + "url": "https://2023.antflix.net#424.19_(B)_(1)" + }, + { + "body": "For motor-driven electric space-heating equipment with a motor rated over 1/8 hp, a disconnecting means shall be located within sight from the motor controller or shall be permitted to comply with the requirements in 424.19(A)(2). [424.19_(B)_(2)](https://2023.antflix.net#424.19_(B)_(2))", + "displayTitle": "(2) Over 1/8 Horsepower", + "children": [], + "url": "https://2023.antflix.net#424.19_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#424.19_(B)" + }, + { + "body": "A unit switch(es) with a marked \"off\" position that is part of a fixed heater and disconnects all ungrounded conductors shall be permitted as the disconnecting means required by this article where other means for disconnection are provided in the types of occupancies in 424.19(C)(1) through (C)(4). [424.19_(C)](https://2023.antflix.net#424.19_(C))", + "displayTitle": "(C) Unit Switch(es) as Disconnecting Means", + "children": [ + { + "body": "In multifamily dwellings, the other disconnecting means shall be within the dwelling unit, or on the same floor as the dwelling unit in which the fixed heater is installed, and shall also be permitted to control general-purpose circuits and appliance circuits. [424.19_(C)_(1)](https://2023.antflix.net#424.19_(C)_(1))", + "displayTitle": "(1) Multifamily Dwellings", + "children": [], + "url": "https://2023.antflix.net#424.19_(C)_(1)" + }, + { + "body": "In two-family dwellings, the other disconnecting means shall be permitted either inside or outside of the dwelling unit in which the fixed heater is installed. In this case, an individual switch or circuit breaker for the dwelling unit shall be permitted and shall also be permitted to control general-purpose circuits and appliance circuits. [424.19_(C)_(2)](https://2023.antflix.net#424.19_(C)_(2))", + "displayTitle": "(2) Two-Family Dwellings", + "children": [], + "url": "https://2023.antflix.net#424.19_(C)_(2)" + }, + { + "body": "In one-family dwellings, the service disconnecting means shall be permitted to be the other disconnecting means. [424.19_(C)_(3)](https://2023.antflix.net#424.19_(C)_(3))", + "displayTitle": "(3) One-Family Dwellings", + "children": [], + "url": "https://2023.antflix.net#424.19_(C)_(3)" + }, + { + "body": "In other occupancies, the branch-circuit switch or circuit breaker, where readily accessible for servicing of the fixed heater, shall be permitted as the other disconnecting means. [424.19_(C)_(4)](https://2023.antflix.net#424.19_(C)_(4))", + "displayTitle": "(4) Other Occupancies", + "children": [], + "url": "https://2023.antflix.net#424.19_(C)_(4)" + } + ], + "url": "https://2023.antflix.net#424.19_(C)" + } + ], + "url": "https://2023.antflix.net#424.19" + }, + { + "displayTitle": "424.20 Thermostatically Controlled Switching Devices", + "children": [ + { + "body": "Thermostatically controlled switching devices and combination thermostats and manually controlled switches shall be permitted to serve as both controllers and disconnecting means, provided they meet all of the following conditions: Provided with a marked \"off\" positionDirectly open all ungrounded conductors when manually placed in the \"off\" positionDesigned so that the circuit cannot be energized automatically after the device has been manually placed in the \"off\" positionLocated as specified in 424.19Located in an accessible location [424.20_(A)](https://2023.antflix.net#424.20_(A))", + "displayTitle": "(A) Serving as Both Controllers and Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#424.20_(A)" + }, + { + "body": "Thermostats that do not directly interrupt all ungrounded conductors and thermostats that operate remote-control circuits shall not be required to meet the requirements of 424.20(A). These devices shall not be permitted as the disconnecting means. [424.20_(B)](https://2023.antflix.net#424.20_(B))", + "displayTitle": "(B) Thermostats That Do Not Directly Interrupt All Ungrounded Conductors", + "children": [], + "url": "https://2023.antflix.net#424.20_(B)" + } + ], + "url": "https://2023.antflix.net#424.20" + }, + { + "body": "Switches and circuit breakers used as disconnecting means shall be of the indicating type. [424.21](https://2023.antflix.net#424.21)", + "displayTitle": "424.21 Switch and Circuit Breaker to Be Indicating", + "children": [], + "url": "https://2023.antflix.net#424.21" + }, + { + "displayTitle": "424.22 Overcurrent Protection", + "children": [ + { + "body": "Electric space-heating equipment, other than motor-operated equipment required to have additional overcurrent protection by Parts III and IV of Article 430 or Parts III and VI of Article 440, shall be permitted to be protected against overcurrent where supplied by one of the branch circuits in Part II of Article 210. [424.22_(A)](https://2023.antflix.net#424.22_(A))", + "displayTitle": "(A) Branch-Circuit Devices", + "children": [], + "url": "https://2023.antflix.net#424.22_(A)" + }, + { + "body": "Resistance-type heating elements in electric space-heating equipment shall be protected at not more than 60 amperes. Equipment rated more than 48 amperes and employing such elements shall have the heating elements subdivided, and each subdivided load shall not exceed 48 amperes. Where a subdivided load is less than 48 amperes, the rating of the supplementary overcurrent protective device shall comply with 424.4(B). A boiler employing resistance-type immersion heating elements contained in an ASME-rated and stamped vessel shall be permitted to comply with 424.72(A). [424.22_(B)](https://2023.antflix.net#424.22_(B))", + "displayTitle": "(B) Resistance Elements", + "children": [], + "url": "https://2023.antflix.net#424.22_(B)" + }, + { + "body": "The supplementary over-current protective devices for the subdivided loads specified in 424.22(B) shall meet all of the following conditions: Be factory-installed within or on the heater enclosure or supplied for use with the heater as a separate assembly by the heater manufacturerBe accessibleBe suitable for branch-circuit protectionWhere cartridge fuses are used to provide overcurrent protection for the subdivided loads, a single disconnecting means shall be permitted to be used as the disconnecting means for all of the subdivided loads.Informational Note No. 1: See 240.10.Informational Note No. 2: See 240.10 for supplementary over-current protection.Informational Note No. 3: See 240.40 for disconnecting means for cartridge fuses in circuits of any voltage. [424.22_(C)](https://2023.antflix.net#424.22_(C))", + "displayTitle": "(C) Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#424.22_(C)" + }, + { + "body": "The conductors supplying the supplementary overcurrent protective devices shall be considered branch-circuit conductors. Where the heaters are rated 50 kW or more, the conductors supplying the supplementary overcurrent protective devices specified in 424.22(C) shall be permitted to be sized at not less than 100 percent of the nameplate rating of the heater, provided all of the following conditions are met:The heater is marked with a minimum conductor size.The conductors are not smaller than the marked minimum size.A temperature-actuated device controls the cyclic operation of the equipment. [424.22_(D)](https://2023.antflix.net#424.22_(D))", + "displayTitle": "(D) Branch-Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#424.22_(D)" + }, + { + "body": "Field-wired conductors between the heater and the supplementary overcurrent protective devices shall be sized at not less than 125 percent of the load served. The supplementary overcurrent protective devices specified in 424.22(C) shall protect these conductors in accordance with 240.4. Where the heaters are rated 50 kW or more, the ampacity of field-wired conductors between the heater and the supplementary overcurrent protective devices shall be permitted to be not less than 100 percent of the load of their respective subdivided circuits, provided all of the following conditions are met:The heater is marked with a minimum conductor size.The conductors are not smaller than the marked minimum size.A temperature-activated device controls the cyclic operation of the equipment. [424.22_(E)](https://2023.antflix.net#424.22_(E))", + "displayTitle": "(E) Conductors for Subdivided Loads", + "children": [], + "url": "https://2023.antflix.net#424.22_(E)" + } + ], + "url": "https://2023.antflix.net#424.22" + }, + { + "displayTitle": "Part IV Marking of Heating Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_13_IV" + }, + { + "displayTitle": "424.28 Nameplate", + "children": [ + { + "body": "Each unit of fixed electric space-heating equipment shall be provided with a nameplate giving the identifying name and the normal rating in volts and watts or in volts and amperes. Electric space-heating equipment intended for use on alternating current only, direct current only, or both shall be marked to so indicate. The marking of equipment consisting of motors over 1/8 hp and other loads shall specify the rating of the motor in volts, amperes, and frequency, and the heating load in volts and watts or in volts and amperes. [424.28_(A)](https://2023.antflix.net#424.28_(A))", + "displayTitle": "(A) Marking Required", + "children": [], + "url": "https://2023.antflix.net#424.28_(A)" + }, + { + "body": "This nameplate shall be located so as to be visible or accessible after installation. [424.28_(B)](https://2023.antflix.net#424.28_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#424.28_(B)" + } + ], + "url": "https://2023.antflix.net#424.28" + }, + { + "body": "All heating elements that are replaceable in the field and are part of an electric heater shall be legibly marked with the ratings in volts and watts or in volts and amperes. [424.29](https://2023.antflix.net#424.29)", + "displayTitle": "424.29 Marking of Heating Elements", + "children": [], + "url": "https://2023.antflix.net#424.29" + }, + { + "displayTitle": "Part V Electric Space-Heating Cables", + "children": [], + "url": "https://2023.antflix.net#divider_8_V" + }, + { + "body": "Factory-assembled nonheating leads of heating cables, if any, shall be at least 2.1 m (7 ft) in length. [424.34](https://2023.antflix.net#424.34)", + "displayTitle": "424.34 Heating Cable Construction", + "children": [], + "url": "https://2023.antflix.net#424.34" + }, + { + "body": "Each unit shall be marked with the identifying name or identification symbol, catalog number, and ratings in volts and watts or in volts and amperes. [424.35](https://2023.antflix.net#424.35)", + "displayTitle": "424.35 Marking of Heating Cables", + "children": [], + "url": "https://2023.antflix.net#424.35" + }, + { + "body": "Wiring located above heated ceilings shall be spaced not less than 50 mm (2 in.) above the heated ceiling. The ampacity of conductors shall be calculated on the basis of an assumed ambient temperature of not less than 50\u00b0C (122\u00b0F), applying the correction factors in accordance with 310.15(B)(1). If this wiring is located above thermal insulation having a minimum thickness of 50 mm (2 in.), it shall be subject to the ambient correction in accordance with 310.15(B)(1). [424.36](https://2023.antflix.net#424.36)", + "displayTitle": "424.36 Clearances of Wiring in Ceilings", + "children": [], + "url": "https://2023.antflix.net#424.36" + }, + { + "displayTitle": "424.38 Area Restrictions", + "children": [ + { + "body": "Heating cables shall be permitted to extend beyond the room or area in which they originate unless prohibited by 424.38(B). [424.38_(A)](https://2023.antflix.net#424.38_(A))", + "displayTitle": "(A) Extending Beyond the Room or Area", + "children": [], + "url": "https://2023.antflix.net#424.38_(A)" + }, + { + "body": "Heating cables shall not be installed as follows: In closets, other than as noted in 424.38(C)Over the top of walls where the wall intersects the ceilingOver partitions that extend to the ceiling, unless they are isolated single runs of embedded cableUnder or through wallsOver cabinets whose clearance from the ceiling is less than the minimum horizontal dimension of the cabinet to the nearest cabinet edge that is open to the room or areaIn tub and shower wallsUnder cabinets or similar built-ins having no clearance to the floor [424.38_(B)](https://2023.antflix.net#424.38_(B))", + "displayTitle": "(B) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#424.38_(B)" + }, + { + "body": "The provisions of 424.38(B) shall not prevent the use of cable in closet ceilings as low-temperature heat sources to control relative humidity, provided they are used only in those portions of the ceiling that are unobstructed to the floor. [424.38_(C)](https://2023.antflix.net#424.38_(C))", + "displayTitle": "(C) In Closet Ceilings as Low-Temperature Heat Sources to Control Relative Humidity", + "children": [], + "url": "https://2023.antflix.net#424.38_(C)" + } + ], + "url": "https://2023.antflix.net#424.38" + }, + { + "body": "Heating elements of cables installed in ceilings shall be separated at least 200 mm (8 in.) from the edge of outlet boxes and junction boxes that are to be used for mounting surface luminaires. A clearance of not less than 50 mm (2 in.) shall be provided from recessed luminaires and their trims, ventilating openings, and other such openings in room surfaces. No heating cable shall be covered by any ceiling surface-mounted equipment. [424.39](https://2023.antflix.net#424.39)", + "displayTitle": "424.39 Clearance From Other Objects and Openings", + "children": [], + "url": "https://2023.antflix.net#424.39" + }, + { + "body": "The length of heating cable shall only be altered using splices identified in the manufacturer's instructions. [424.40](https://2023.antflix.net#424.40)", + "displayTitle": "424.40 Splices", + "children": [], + "url": "https://2023.antflix.net#424.40" + }, + { + "displayTitle": "424.41 Ceiling Installation of Heating Cables on Dry Board, in Plaster, and on Concrete", + "children": [ + { + "body": "Heating cables identified only for use in ceiling installations shall not be installed in walls unless it is necessary for an isolated single run of cable to be installed down a vertical surface to reach a dropped ceiling. [424.41_(A)](https://2023.antflix.net#424.41_(A))", + "displayTitle": "(A) In Walls", + "children": [], + "url": "https://2023.antflix.net#424.41_(A)" + }, + { + "body": "Adjacent runs of heating cable shall be installed in accordance with the manufacturer's instructions. [424.41_(B)](https://2023.antflix.net#424.41_(B))", + "displayTitle": "(B) Adjacent Runs", + "children": [], + "url": "https://2023.antflix.net#424.41_(B)" + }, + { + "body": "Heating cables shall be applied only to gypsum board, plaster lath, or other fire-resistant material. With metal lath or other electrically conductive surfaces, a coat of plaster or other means employed in accordance with the heating cable manufacturer's instructions shall be applied to completely separate the metal lath or conductive surface from the cable. Informational Note: See 424.41(F). [424.41_(C)](https://2023.antflix.net#424.41_(C))", + "displayTitle": "(C) Surfaces to Be Applied", + "children": [], + "url": "https://2023.antflix.net#424.41_(C)" + }, + { + "body": "All heating cables, the splice between the heating cable and nonheating leads, and 75-mm (3-in.) minimum of the nonheating lead at the splice shall be embedded in plaster or dry board in the same manner as the heating cable. [424.41_(D)](https://2023.antflix.net#424.41_(D))", + "displayTitle": "(D) Splices", + "children": [], + "url": "https://2023.antflix.net#424.41_(D)" + }, + { + "body": "The entire ceiling surface shall have a finish of thermally noninsulating sand plaster that has a nominal thickness of 13 mm (1/2 in.), or other noninsulating material identified as suitable for this use and applied according to specified thickness and directions. [424.41_(E)](https://2023.antflix.net#424.41_(E))", + "displayTitle": "(E) Ceiling Surface", + "children": [], + "url": "https://2023.antflix.net#424.41_(E)" + }, + { + "body": "Cables shall be secured by means of approved stapling, tape, plaster, nonmetallic spreaders, or other approved means either at intervals not exceeding 400 mm (16 in.) or at intervals not exceeding 1.8 m (6 ft) for cables identified for such use. Staples or metal fasteners that straddle the cable shall not be used with metal lath or other electrically conductive surfaces. [424.41_(F)](https://2023.antflix.net#424.41_(F))", + "displayTitle": "(F) Secured", + "children": [], + "url": "https://2023.antflix.net#424.41_(F)" + }, + { + "body": "In dry board installations, the entire ceiling below the heating cable shall be covered with gypsum board not exceeding 13 mm (1/2 in.) thickness. The void between the upper layer of gypsum board, plaster lath, or other fire-resistant material and the surface layer of gypsum board shall be completely filled with thermally conductive, nonshrinking plaster or other approved material or equivalent thermal conductivity. [424.41_(G)](https://2023.antflix.net#424.41_(G))", + "displayTitle": "(G) Dry Board Installations", + "children": [], + "url": "https://2023.antflix.net#424.41_(G)" + }, + { + "body": "Cables shall be kept free from contact with metal or other electrically conductive surfaces. [424.41_(H)](https://2023.antflix.net#424.41_(H))", + "displayTitle": "(H) Free From Contact With Conductive Surfaces", + "children": [], + "url": "https://2023.antflix.net#424.41_(H)" + }, + { + "body": "In dry board applications, cable shall be installed parallel to the joist, leaving a clear space centered under the joist of 65 mm (214 in.) (width) between centers of adjacent runs of cable. A surface layer of gypsum board shall be mounted so that the nails or other fasteners do not pierce the heating cable. [424.41_(I)](https://2023.antflix.net#424.41_(I))", + "displayTitle": "(I) Joists", + "children": [], + "url": "https://2023.antflix.net#424.41_(I)" + }, + { + "body": "Cables shall cross joists only at the ends of the room unless the cable is required to cross joists elsewhere in order to satisfy the manufacturer's instructions regarding clearance from ceiling penetrations and luminaires. [424.41_(J)](https://2023.antflix.net#424.41_(J))", + "displayTitle": "(J) Crossing Joists", + "children": [], + "url": "https://2023.antflix.net#424.41_(J)" + } + ], + "url": "https://2023.antflix.net#424.41" + }, + { + "body": "Finished ceilings shall not be covered with decorative panels or beams constructed of materials that have thermal insulating properties, such as wood, fiber, or plastic. Finished ceilings shall be permitted to be covered with paint, wallpaper, or other approved surface finishes. [424.42](https://2023.antflix.net#424.42)", + "displayTitle": "424.42 Finished Ceilings", + "children": [], + "url": "https://2023.antflix.net#424.42" + }, + { + "displayTitle": "424.43 Installation of Nonheating Leads of Cables", + "children": [ + { + "body": "Free nonheating leads of cables shall be installed in accordance with Chapter 3 wiring methods, or other listed means, from the junction box to a location within the ceiling. [424.43_(A)](https://2023.antflix.net#424.43_(A))", + "displayTitle": "(A) Free Nonheating Leads", + "children": [], + "url": "https://2023.antflix.net#424.43_(A)" + }, + { + "body": "Not less than 150 mm (6 in.) of free nonheating lead shall be within the junction box. The marking of the leads shall be visible in the junction box. [424.43_(B)](https://2023.antflix.net#424.43_(B))", + "displayTitle": "(B) Leads in Junction Box", + "children": [], + "url": "https://2023.antflix.net#424.43_(B)" + }, + { + "body": "Excess leads of heating cables shall not be cut but shall be secured to the underside of the ceiling and embedded in plaster or other approved material, leaving only a length sufficient to reach the junction box with not less than 150 mm (6 in.) of free lead within the box. [424.43_(C)](https://2023.antflix.net#424.43_(C))", + "displayTitle": "(C) Excess Leads", + "children": [], + "url": "https://2023.antflix.net#424.43_(C)" + } + ], + "url": "https://2023.antflix.net#424.43" + }, + { + "displayTitle": "424.44 Installation of Cables in Concrete or Poured Masonry Floors", + "children": [ + { + "body": "Adjacent runs of heating cable shall be installed in accordance with the manufacturer's instructions. [424.44_(A)](https://2023.antflix.net#424.44_(A))", + "displayTitle": "(A) Adjacent Runs", + "children": [], + "url": "https://2023.antflix.net#424.44_(A)" + }, + { + "body": "Cables shall be secured in place by nonmetallic frames or spreaders or other approved means while the concrete or other finish is applied. [424.44_(B)](https://2023.antflix.net#424.44_(B))", + "displayTitle": "(B) Secured in Place", + "children": [], + "url": "https://2023.antflix.net#424.44_(B)" + }, + { + "body": "Leads shall be protected where they leave the floor by rigid metal conduit, intermediate metal conduit, rigid polyvinyl chloride conduit, electrical metallic tubing, or by other approved means. [424.44_(C)](https://2023.antflix.net#424.44_(C))", + "displayTitle": "(C) Leads Protected", + "children": [], + "url": "https://2023.antflix.net#424.44_(C)" + }, + { + "body": "Bushings or approved fittings shall be used where the leads emerge within the floor slab. [424.44_(D)](https://2023.antflix.net#424.44_(D))", + "displayTitle": "(D) Bushings or Approved Fittings", + "children": [], + "url": "https://2023.antflix.net#424.44_(D)" + }, + { + "body": "In addition to the requirements in 210.8, ground-fault circuit-interrupter protection for personnel shall be provided for cables installed in electrically heated floors of bathrooms, kitchens, and in hydromassage bathtub locations. [424.44_(E)](https://2023.antflix.net#424.44_(E))", + "displayTitle": "(E) Ground-Fault Circuit-Interrupter Protection", + "children": [], + "url": "https://2023.antflix.net#424.44_(E)" + } + ], + "url": "https://2023.antflix.net#424.44" + }, + { + "displayTitle": "424.45 Installation of Cables Under Floor Coverings", + "children": [ + { + "body": "Heating cables for installation under floor covering shall be identified as suitable for installation under floor covering. [424.45_(A)](https://2023.antflix.net#424.45_(A))", + "displayTitle": "(A) Identification", + "children": [], + "url": "https://2023.antflix.net#424.45_(A)" + }, + { + "body": "Heating cables shall not be installed where they bridge expansion joints unless provided with expansion and contraction fittings applicable to the manufacture of the cable. [424.45_(B)](https://2023.antflix.net#424.45_(B))", + "displayTitle": "(B) Expansion Joints", + "children": [], + "url": "https://2023.antflix.net#424.45_(B)" + }, + { + "body": "Heating cables shall be connected to branch-circuit and supply wiring by wiring methods described in the installation instructions. [424.45_(C)](https://2023.antflix.net#424.45_(C))", + "displayTitle": "(C) Connection to Conductors", + "children": [], + "url": "https://2023.antflix.net#424.45_(C)" + }, + { + "body": "Heating cables shall be positioned and secured in place under the floor covering, in accordance with the manufacturer's instructions. [424.45_(D)](https://2023.antflix.net#424.45_(D))", + "displayTitle": "(D) Anchoring", + "children": [], + "url": "https://2023.antflix.net#424.45_(D)" + }, + { + "body": "In addition to the requirements in 210.8, ground-fault circuit-interrupter protection for personnel shall be provided. [424.45_(E)](https://2023.antflix.net#424.45_(E))", + "displayTitle": "(E) Ground-Fault Circuit-Interrupter Protection", + "children": [], + "url": "https://2023.antflix.net#424.45_(E)" + }, + { + "body": "Grounding means, such as copper braid, metal sheath, or other approved means, shall be provided as part of the heated length. [424.45_(F)](https://2023.antflix.net#424.45_(F))", + "displayTitle": "(F) Grounding Braid or Sheath", + "children": [], + "url": "https://2023.antflix.net#424.45_(F)" + } + ], + "url": "https://2023.antflix.net#424.45" + }, + { + "body": "Cable installations shall be made with due care to prevent damage to the cable assembly and shall be inspected and approved before cables are covered or concealed. [424.46](https://2023.antflix.net#424.46)", + "displayTitle": "424.46 Inspection", + "children": [], + "url": "https://2023.antflix.net#424.46" + }, + { + "body": "The manufacturers of electric space-heating cables shall provide marking labels that indicate that the space-heating installation incorporates electric space-heating cables and instructions that the labels shall be affixed to the panelboards to identify which branch circuits supply the circuits to those space-heating installations. If the electric space-heating cable installations are visible and distinguishable after installation, the labels shall not be required to be provided and affixed to the panelboards. [424.47](https://2023.antflix.net#424.47)", + "displayTitle": "424.47 Label Provided by Manufacturer", + "children": [], + "url": "https://2023.antflix.net#424.47" + }, + { + "body": "Unless prohibited by 424.38(B), heating cables and cable sets shall be permitted to be installed in, on, or behind walls provided all of the following are met: Heating cables and cable sets shall be identified as suitable for installation in, on, or behind walls.Heating cables and cable sets shall be GFCI protected.Grounding means, such as copper braid, metal sheath, or other approved means, shall be provided.Heating cables and cable sets shall be AFCI protected.Heating cables and cable sets shall be permitted to be installed no more than 1.2 m (4 ft) above the floor.This requirement shall become effective January 1, 2026. [424.48](https://2023.antflix.net#424.48)", + "displayTitle": "424.48 Installation of Cables in Walls", + "children": [], + "url": "https://2023.antflix.net#424.48" + }, + { + "displayTitle": "Part VI Duct Heaters", + "children": [], + "url": "https://2023.antflix.net#divider_5_VI" + }, + { + "body": "Part VI shall apply to any heater mounted in the airstream of a forced-air system where the air-moving unit is not provided as an integral part of the equipment. [424.57](https://2023.antflix.net#424.57)", + "displayTitle": "424.57 General", + "children": [], + "url": "https://2023.antflix.net#424.57" + }, + { + "body": "Heaters installed in an air duct shall be identified as suitable for the installation. [424.58](https://2023.antflix.net#424.58)", + "displayTitle": "424.58 Identification", + "children": [], + "url": "https://2023.antflix.net#424.58" + }, + { + "body": "Means shall be provided to ensure uniform airflow over the face of the heater in accordance with the manufacturer's instructions. Informational Note: Heaters installed within 1.2 m (4 ft) of the outlet of an air-moving device, heat pump, air conditioner, elbows, baffle plates, or other obstructions in ductwork may require turning vanes, pressure plates, or other devices on the inlet side of the duct heater to ensure an even distribution of air over the face of the heater. [424.59](https://2023.antflix.net#424.59)", + "displayTitle": "424.59 Airflow", + "children": [], + "url": "https://2023.antflix.net#424.59" + }, + { + "body": "Duct heaters intended for use with elevated inlet air temperature shall be identified as suitable for use at the elevated temperatures. [424.60](https://2023.antflix.net#424.60)", + "displayTitle": "424.60 Elevated Inlet Temperature", + "children": [], + "url": "https://2023.antflix.net#424.60" + }, + { + "body": "Heat pumps and air conditioners having duct heaters closer than 1.2 m (4 ft) to the heat pump or air conditioner shall have both the duct heater and heat pump or air conditioner identified as suitable for such installation and so marked. [424.61](https://2023.antflix.net#424.61)", + "displayTitle": "424.61 Installation of Duct Heaters With Heat Pumps and Air Conditioners", + "children": [], + "url": "https://2023.antflix.net#424.61" + }, + { + "body": "Duct heaters used with air conditioners or other air-cooling equipment that could result in condensation of moisture shall be identified as suitable for use with air conditioners. [424.62](https://2023.antflix.net#424.62)", + "displayTitle": "424.62 Condensation", + "children": [], + "url": "https://2023.antflix.net#424.62" + }, + { + "body": "Means shall be provided to ensure that the fan circuit is energized when any heater circuit is energized. However, time- or temperature-controlled delay in energizing the fan motor shall be permitted. [424.63](https://2023.antflix.net#424.63)", + "displayTitle": "424.63 Fan Circuit Interlock", + "children": [], + "url": "https://2023.antflix.net#424.63" + }, + { + "body": "Each duct heater shall be provided with an approved, integral, automatic-reset temperature-limiting control or controllers to de-energize the circuit or circuits. In addition, an integral independent supplementary control or controllers shall be provided in each duct heater that disconnects a sufficient number of conductors to interrupt current flow. This device shall be manually resettable or replaceable. [424.64](https://2023.antflix.net#424.64)", + "displayTitle": "424.64 Limit Controls", + "children": [], + "url": "https://2023.antflix.net#424.64" + }, + { + "body": "Duct heater controller equipment shall be accessible with the disconnecting means installed within sight from the controller or as permitted by 424.19(A). [424.65](https://2023.antflix.net#424.65)", + "displayTitle": "424.65 Location of Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#424.65" + }, + { + "body": "Duct heaters shall be installed in accordance with the manufacturer's instructions in such a manner that the operation of the duct heater does not create a hazard to persons or property. Furthermore, duct heaters shall be located with respect to building construction and other equipment so as to permit access to the heater and the heater control. Working space shall be maintained in accordance with 110.26(A)(4) and shall permit replacement of controls and heating elements and for adjusting and cleaning of controls and other parts requiring such attention. Informational Note: See NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems, and NFPA 90B, Standard for the Installation of Warm Air Heating and Air-Conditioning Systems, for additional installation information. [424.66](https://2023.antflix.net#424.66)", + "displayTitle": "424.66 Installation", + "children": [], + "url": "https://2023.antflix.net#424.66" + }, + { + "displayTitle": "Part VII Resistance-Type Boilers", + "children": [], + "url": "https://2023.antflix.net#divider_5_VII" + }, + { + "body": "The provisions in Part VII of this article shall apply to boilers employing resistance-type heating elements. See Part VIII of this article for electrode-type boilers. [424.70](https://2023.antflix.net#424.70)", + "displayTitle": "424.70 Scope", + "children": [], + "url": "https://2023.antflix.net#424.70" + }, + { + "body": "Resistance-type boilers shall be identified as suitable for the installation. [424.71](https://2023.antflix.net#424.71)", + "displayTitle": "424.71 Identification", + "children": [], + "url": "https://2023.antflix.net#424.71" + }, + { + "displayTitle": "424.72 Overcurrent Protection", + "children": [ + { + "body": "A boiler employing resistance-type immersion heating elements contained in an ASME-rated and stamped vessel shall have the heating elements protected at not more than 150 amperes. Such a boiler rated more than 120 amperes shall have the heating elements subdivided into loads not exceeding 120 amperes. Where a subdivided load is less than 120 amperes, the rating of the overcurrent protective device shall comply with 424.4(B). [424.72_(A)](https://2023.antflix.net#424.72_(A))", + "displayTitle": "(A) Boiler Employing Resistance-Type Immersion Heating Elements in an ASME-Rated and Stamped Vessel", + "children": [], + "url": "https://2023.antflix.net#424.72_(A)" + }, + { + "body": "A boiler employing resistance-type heating elements not contained in an ASME-rated and stamped vessel shall have the heating elements protected at not more than 60 amperes. Such a boiler rated more than 48 amperes shall have the heating elements subdivided into loads not exceeding 48 amperes. Where a subdivided load is less than 48 amperes, the rating of the overcurrent protective device shall comply with 424.4(B). [424.72_(B)](https://2023.antflix.net#424.72_(B))", + "displayTitle": "(B) Boiler Employing Resistance-Type Heating Elements Rated More Than 48 Amperes and Not Contained in an ASME-Rated and Stamped Vessel", + "children": [], + "url": "https://2023.antflix.net#424.72_(B)" + }, + { + "body": "The supplementary overcurrent protective devices for the subdivided loads as required by 424.72(A) and (B) shall be as follows: Factory-installed within or on the boiler enclosure or provided as a separate assembly by the boiler manufacturerAccessible, but need not be readily accessibleSuitable for branch-circuit protectionWhere cartridge fuses are used to provide this overcurrent protection, a single disconnecting means shall be permitted for the several subdivided circuits. See 240.40. [424.72_(C)](https://2023.antflix.net#424.72_(C))", + "displayTitle": "(C) Supplementary Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#424.72_(C)" + }, + { + "body": "The conductors supplying these supplementary overcurrent protective devices shall be considered branch-circuit conductors. Where the heaters are rated 50 kW or more, the conductors supplying the overcurrent protective device specified in 424.72(C) shall be permitted to be sized at not less than 100 percent of the nameplate rating of the heater, provided all of the following conditions are met:The heater is marked with a minimum conductor size and conductor insulation temperature rating.The conductors are not smaller than the marked minimum size.A temperature- or pressure-actuated device controls the cyclic operation of the equipment. [424.72_(D)](https://2023.antflix.net#424.72_(D))", + "displayTitle": "(D) Conductors Supplying Supplementary Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#424.72_(D)" + }, + { + "body": "Field-wired conductors between the heater and the supplementary overcurrent protective devices shall be sized at not less than 125 percent of the load served. The supplementary overcurrent protective devices specified in 424.72(C) shall protect these conductors in accordance with 240.4. Where the heaters are rated 50 kW or more, the ampacity of field-wired conductors between the heater and the supplementary overcurrent protective devices shall be permitted to be not less than 100 percent of the load of their respective subdivided circuits, provided all of the following conditions are met:The heater is marked with a minimum conductor size.The conductors are not smaller than the marked minimum size.A temperature-activated device controls the cyclic operation of the equipment. [424.72_(E)](https://2023.antflix.net#424.72_(E))", + "displayTitle": "(E) Conductors for Subdivided Loads", + "children": [], + "url": "https://2023.antflix.net#424.72_(E)" + } + ], + "url": "https://2023.antflix.net#424.72" + }, + { + "body": "Each boiler designed so that in normal operation there is no change in state of the heat transfer medium shall be equipped with a temperature-sensitive limiting means. It shall be installed to limit maximum liquid temperature and shall directly or indirectly disconnect all ungrounded conductors to the heating elements. Such means shall be in addition to a temperature-regulating system and other devices protecting the tank against excessive pressure. [424.73](https://2023.antflix.net#424.73)", + "displayTitle": "424.73 Overtemperature Limit Control", + "children": [], + "url": "https://2023.antflix.net#424.73" + }, + { + "body": "Each boiler designed so that in normal operation there is a change in state of the heat transfer medium from liquid to vapor shall be equipped with a pressure-sensitive limiting means. It shall be installed to limit maximum pressure and shall directly or indirectly disconnect all ungrounded conductors to the heating elements. Such means shall be in addition to a pressure-regulating system and other devices protecting the tank against excessive pressure. [424.74](https://2023.antflix.net#424.74)", + "displayTitle": "424.74 Overpressure Limit Control", + "children": [], + "url": "https://2023.antflix.net#424.74" + }, + { + "displayTitle": "Part VIII Electrode-Type Boilers", + "children": [], + "url": "https://2023.antflix.net#divider_1_VIII" + }, + { + "body": "The provisions in Part VIII of this article shall apply to boilers for operation at 600 volts, nominal, or less, in which heat is generated by the passage of current between electrodes through the liquid being heated. Informational Note: See Part V of Article 495 for over 1000 volts. [424.80](https://2023.antflix.net#424.80)", + "displayTitle": "424.80 Scope", + "children": [], + "url": "https://2023.antflix.net#424.80" + }, + { + "body": "Electrode-type boilers shall be identified as suitable for the installation. [424.81](https://2023.antflix.net#424.81)", + "displayTitle": "424.81 Identification", + "children": [], + "url": "https://2023.antflix.net#424.81" + }, + { + "body": "The size of branch-circuit conductors and overcurrent protective devices shall be calculated on the basis of 125 percent of the total load (motors not included). A contactor, relay, or other device, approved for continuous operation at 100 percent of its rating, shall be permitted to supply its full-rated load. See 210.19(A), Exception to (1). The provisions of this section shall not apply to conductors that form an integral part of an approved boiler. Where an electrode boiler is rated 50 kW or more, the conductors supplying the boiler electrode(s) shall be permitted to be sized at not less than 100 percent of the nameplate rating of the electrode boiler, provided all the following conditions are met:The electrode boiler is marked with a minimum conductor size.The conductors are not smaller than the marked minimum size.A temperature- or pressure-actuated device controls the cyclic operation of the equipment. [424.82](https://2023.antflix.net#424.82)", + "displayTitle": "424.82 Branch-Circuit Requirements", + "children": [], + "url": "https://2023.antflix.net#424.82" + }, + { + "body": "Each boiler, designed so that in normal operation there is no change in state of the heat transfer medium, shall be equipped with a temperature-sensitive limiting means. It shall be installed to limit maximum liquid temperature and shall directly or indirectly interrupt all current flow through the electrodes. Such means shall be in addition to the temperature-regulating system and other devices protecting the tank against excessive pressure. [424.83](https://2023.antflix.net#424.83)", + "displayTitle": "424.83 Overtemperature Limit Control", + "children": [], + "url": "https://2023.antflix.net#424.83" + }, + { + "body": "Each boiler, designed so that in normal operation there is a change in state of the heat transfer medium from liquid to vapor, shall be equipped with a pressure-sensitive limiting means. It shall be installed to limit maximum pressure and shall directly or indirectly interrupt all current flow through the electrodes. Such means shall be in addition to a pressure-regulating system and other devices protecting the tank against excessive pressure. [424.84](https://2023.antflix.net#424.84)", + "displayTitle": "424.84 Overpressure Limit Control", + "children": [], + "url": "https://2023.antflix.net#424.84" + }, + { + "body": "Boilers designed such that fault currents do not pass through the pressure vessel, and the pressure vessel is electrically isolated from the electrodes, all exposed noncurrent-carrying metal parts, including the pressure vessel, supply, and return connecting piping, shall be connected to an equipment grounding conductor. For all other designs, the pressure vessel containing the electrodes shall be isolated and electrically insulated from ground. [424.85](https://2023.antflix.net#424.85)", + "displayTitle": "424.85 Grounding", + "children": [], + "url": "https://2023.antflix.net#424.85" + }, + { + "body": "All electrode-type boilers shall be marked to show the following: The manufacturer's name.The rating in volts, amperes, and kilowatts.The electrical supply required specifying frequency, number of phases, and number of wires.The marking \"Electrode-Type Boiler.\"A warning marking, \"All Power Supplies Shall Be Disconnected Before Servicing, Including Servicing the Pressure Vessel.\"A field-applied warning marking or label shall comply with 110.21(B). The nameplate shall be located so as to be visible after installation. [424.86](https://2023.antflix.net#424.86)", + "displayTitle": "424.86 Markings", + "children": [], + "url": "https://2023.antflix.net#424.86" + }, + { + "displayTitle": "Part IX Electric Radiant Heating Panels and Heating Panel Sets", + "children": [], + "url": "https://2023.antflix.net#divider_0_IX" + }, + { + "body": "The provisions of Part IX of this article shall apply to radiant heating panels and heating panel sets. [424.90](https://2023.antflix.net#424.90)", + "displayTitle": "424.90 Scope", + "children": [], + "url": "https://2023.antflix.net#424.90" + }, + { + "displayTitle": "424.92 Markings", + "children": [ + { + "body": "Markings shall be permanent and in a location that is visible prior to application of panel trim cover. [424.92_(A)](https://2023.antflix.net#424.92_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#424.92_(A)" + }, + { + "body": "Each unit shall be identified as suitable for the installation. [424.92_(B)](https://2023.antflix.net#424.92_(B))", + "displayTitle": "(B) Identified as Suitable", + "children": [], + "url": "https://2023.antflix.net#424.92_(B)" + }, + { + "body": "Each unit shall be marked with the identifying name or identification symbol, catalog number, and rating in volts and watts or in volts and amperes. [424.92_(C)](https://2023.antflix.net#424.92_(C))", + "displayTitle": "(C) Required Markings", + "children": [], + "url": "https://2023.antflix.net#424.92_(C)" + } + ], + "url": "https://2023.antflix.net#424.92" + }, + { + "displayTitle": "424.93 Installation", + "children": [ + { + "displayTitle": "(A) General", + "children": [ + { + "body": "Heating panels and heating panel sets shall be installed in accordance with the manufacturer's instructions. [424.93_(A)_(1)](https://2023.antflix.net#424.93_(A)_(1))", + "displayTitle": "(1) Manufacturer's Instructions", + "children": [], + "url": "https://2023.antflix.net#424.93_(A)_(1)" + }, + { + "body": "The heating portion shall not be installed as follows: In or behind surfaces where subject to physical damageRun through or above walls, partitions, cupboards, or similar portions of structures that extend to the ceilingRun in or through thermal insulation, but shall be permitted to be in contact with the surface of thermal insulationIn walls, except as permitted by 424.93(C) [424.93_(A)_(2)](https://2023.antflix.net#424.93_(A)_(2))", + "displayTitle": "(2) Locations Not Permitted", + "children": [], + "url": "https://2023.antflix.net#424.93_(A)_(2)" + }, + { + "body": "Edges of panels and panel sets shall be separated by not less than 200 mm (8 in.) from the edges of any outlet boxes and junction boxes that are to be used for mounting surface luminaires. A clearance of not less than 50 mm (2 in.) shall be provided from recessed luminaires and their trims, ventilating openings, and other such openings in room surfaces, unless the heating panels and panel sets are listed and marked for lesser clearances, in which case they shall be permitted to be installed at the marked clearances. Sufficient area shall be provided to ensure that no heating panel or heating panel set is to be covered by any surface-mounted equipment. [424.93_(A)_(3)](https://2023.antflix.net#424.93_(A)_(3))", + "displayTitle": "(3) Separation From Outlets for Luminaires", + "children": [], + "url": "https://2023.antflix.net#424.93_(A)_(3)" + }, + { + "body": "After the heating panels or heating panel sets are installed and inspected, it shall be permitted to install a surface that has been identified by the manufacturer's instructions as being suitable for the installation. The surface shall be secured so that the nails or other fastenings do not pierce the heating panels or heating panel sets. [424.93_(A)_(4)](https://2023.antflix.net#424.93_(A)_(4))", + "displayTitle": "(4) Surfaces Covering Heating Panels", + "children": [], + "url": "https://2023.antflix.net#424.93_(A)_(4)" + }, + { + "body": "Surfaces permitted by 424.93(A)(4) shall be permitted to be covered with paint, wallpaper, or other approved surfaces identified in the manufacturer's instructions as being suitable. [424.93_(A)_(5)](https://2023.antflix.net#424.93_(A)_(5))", + "displayTitle": "(5) Surface Coverings", + "children": [], + "url": "https://2023.antflix.net#424.93_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#424.93_(A)" + }, + { + "displayTitle": "(B) Heating Panel Sets", + "children": [ + { + "body": "Heating panel sets shall be permitted to be secured to the lower face of joists or mounted in between joists, headers, or nailing strips. [424.93_(B)_(1)](https://2023.antflix.net#424.93_(B)_(1))", + "displayTitle": "(1) Mounting Location", + "children": [], + "url": "https://2023.antflix.net#424.93_(B)_(1)" + }, + { + "body": "Heating panel sets shall be installed parallel to joists or nailing strips. [424.93_(B)_(2)](https://2023.antflix.net#424.93_(B)_(2))", + "displayTitle": "(2) Parallel to Joists or Nailing Strips", + "children": [], + "url": "https://2023.antflix.net#424.93_(B)_(2)" + }, + { + "body": "Nailing or stapling of heating panel sets shall be done only through the unheated portions provided for this purpose. Heating panel sets shall not be cut through or nailed through any point closer than 6 mm (1/4 in.) to the element. Nails, staples, or other fasteners shall not be used where they penetrate current-carrying parts. [424.93_(B)_(3)](https://2023.antflix.net#424.93_(B)_(3))", + "displayTitle": "(3) Installation of Nails, Staples, or Other Fasteners", + "children": [], + "url": "https://2023.antflix.net#424.93_(B)_(3)" + }, + { + "body": "Heating panel sets shall be installed as complete units unless identified as suitable for field cutting in an approved manner. [424.93_(B)_(4)](https://2023.antflix.net#424.93_(B)_(4))", + "displayTitle": "(4) Installed as Complete Unit", + "children": [], + "url": "https://2023.antflix.net#424.93_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#424.93_(B)" + }, + { + "body": "Unless prohibited by 424.93(A)(2), heating panels shall be permitted to be installed in, on, or behind walls provided all of the following are met: Heating panels shall be identified as suitable for installation in, on, or behind walls.Heating panels shall be installed per the manufacturer's instructions and in accordance with the product listing.Heating panels shall be GFCI protected.Grounding means, such as copper braid, metal sheath, or other approved means, shall be provided.Heating panels shall be AFCI protected.Heating panels shall be permitted to be installed no more than 1.2 m (4 ft) above the floor.Exception: Low-voltage heating panels shall not be required to be GFCI protected.This requirement shall become effective January 1, 2026. [424.93_(C)](https://2023.antflix.net#424.93_(C))", + "displayTitle": "(C) Installation of Heating Panels in Walls", + "children": [], + "url": "https://2023.antflix.net#424.93_(C)" + } + ], + "url": "https://2023.antflix.net#424.93" + }, + { + "body": "Wiring located above heated ceilings shall be spaced not less than 50 mm (2 in.) above the heated ceiling. The ampacity shall be calculated on the basis of an assumed ambient temperature of not less than 50\u00b0C (122\u00b0F), applying the correction factors in accordance with 310.15(B)(1). If this wiring is located above thermal insulation having a minimum thickness of 50 mm (2 in.), it shall be subject to the ambient correction in accordance with 310.15(B)(1). [424.94](https://2023.antflix.net#424.94)", + "displayTitle": "424.94 Clearances of Wiring in Ceilings", + "children": [], + "url": "https://2023.antflix.net#424.94" + }, + { + "displayTitle": "424.95 Location of Branch-Circuit and Feeder Wiring in Walls", + "children": [ + { + "body": "Wiring methods shall comply with 310.14(A)(3). [424.95_(A)](https://2023.antflix.net#424.95_(A))", + "displayTitle": "(A) Exterior Walls", + "children": [], + "url": "https://2023.antflix.net#424.95_(A)" + }, + { + "body": "The ampacity of any wiring behind heating panels or heating panel sets located in interior walls or partitions shall be calculated on the basis of an assumed ambient temperature of 40\u00b0C (104\u00b0F), applying the correction factors in accordance with 310.15(B)(1). [424.95_(B)](https://2023.antflix.net#424.95_(B))", + "displayTitle": "(B) Interior Walls", + "children": [], + "url": "https://2023.antflix.net#424.95_(B)" + } + ], + "url": "https://2023.antflix.net#424.95" + }, + { + "displayTitle": "424.96 Connection to Branch-Circuit Conductors", + "children": [ + { + "body": "Heating panels or heating panel sets assembled together in the field to form a heating installation in one room or area shall be connected in accordance with the manufacturer's instructions. [424.96_(A)](https://2023.antflix.net#424.96_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#424.96_(A)" + }, + { + "body": "Heating panels shall be connected to branch-circuit wiring by an approved wiring method. [424.96_(B)](https://2023.antflix.net#424.96_(B))", + "displayTitle": "(B) Heating Panels", + "children": [], + "url": "https://2023.antflix.net#424.96_(B)" + }, + { + "displayTitle": "(C) Heating Panel Sets", + "children": [ + { + "body": "Heating panel sets shall be connected to branch-circuit wiring by a method identified as being suitable for the purpose. [424.96_(C)_(1)](https://2023.antflix.net#424.96_(C)_(1))", + "displayTitle": "(1) Connection to Branch-Circuit Wiring", + "children": [], + "url": "https://2023.antflix.net#424.96_(C)_(1)" + }, + { + "body": "A heating panel set provided with terminal junction assembly shall be permitted to have the nonheating leads attached at the time of installation in accordance with the manufacturer's instructions. [424.96_(C)_(2)](https://2023.antflix.net#424.96_(C)_(2))", + "displayTitle": "(2) Panel Sets With Terminal Junction Assembly", + "children": [], + "url": "https://2023.antflix.net#424.96_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#424.96_(C)" + } + ], + "url": "https://2023.antflix.net#424.96" + }, + { + "body": "Excess nonheating leads of heating panels or heating panel sets shall be permitted to be cut to the required length as indicated in the manufacturer's installation instructions. Nonheating leads that are an integral part of a heating panel or heating panel set, either attached or provided by the manufacturer as part of a terminal junction assembly, shall not be subjected to the ampacity requirements of 424.4(B) for branch circuits. [424.97](https://2023.antflix.net#424.97)", + "displayTitle": "424.97 Nonheating Leads", + "children": [], + "url": "https://2023.antflix.net#424.97" + }, + { + "displayTitle": "424.98 Installation in Concrete or Poured Masonry", + "children": [ + { + "body": "Heating panels or heating panel sets shall be secured in place by means specified in the manufacturer's instructions and identified as suitable for the installation. [424.98_(A)](https://2023.antflix.net#424.98_(A))", + "displayTitle": "(A) Secured in Place and Identified as Suitable", + "children": [], + "url": "https://2023.antflix.net#424.98_(A)" + }, + { + "body": "Heating panels or heating panel sets shall not be installed where they bridge expansion joints unless provision is made for expansion and contraction. [424.98_(B)](https://2023.antflix.net#424.98_(B))", + "displayTitle": "(B) Expansion Joints", + "children": [], + "url": "https://2023.antflix.net#424.98_(B)" + }, + { + "body": "Spacings shall be maintained between heating panels or heating panel sets and metal embedded in the floor. Grounded metal-clad heating panels shall be permitted to be in contact with metal embedded in the floor. [424.98_(C)](https://2023.antflix.net#424.98_(C))", + "displayTitle": "(C) Spacings", + "children": [], + "url": "https://2023.antflix.net#424.98_(C)" + }, + { + "body": "Leads shall be protected where they leave the floor by rigid metal conduit, intermediate metal conduit, rigid polyvinyl chloride conduit, or electrical metallic tubing, or by other approved means. [424.98_(D)](https://2023.antflix.net#424.98_(D))", + "displayTitle": "(D) Protection of Leads", + "children": [], + "url": "https://2023.antflix.net#424.98_(D)" + }, + { + "body": "Bushings or approved fittings shall be used where the leads emerge within the floor slabs. [424.98_(E)](https://2023.antflix.net#424.98_(E))", + "displayTitle": "(E) Bushings or Fittings Required", + "children": [], + "url": "https://2023.antflix.net#424.98_(E)" + } + ], + "url": "https://2023.antflix.net#424.98" + }, + { + "displayTitle": "424.99 Installation Under Floor Covering", + "children": [ + { + "body": "Heating panels or heating panel sets for installation under floor covering shall be identified as suitable for installation under floor covering. [424.99_(A)](https://2023.antflix.net#424.99_(A))", + "displayTitle": "(A) Identification", + "children": [], + "url": "https://2023.antflix.net#424.99_(A)" + }, + { + "body": "Listed heating panels or panel sets, if installed under floor covering, shall be installed on surfaces that are smooth and flat in accordance with the manufacturer's instructions and shall also comply with 424.99(B)(1) through (B)(6). [424.99_(B)](https://2023.antflix.net#424.99_(B))", + "displayTitle": "(B) Installation", + "children": [ + { + "body": "Heating panels or heating panel sets shall not be installed where they bridge expansion joints unless protected from expansion and contraction. [424.99_(B)_(1)](https://2023.antflix.net#424.99_(B)_(1))", + "displayTitle": "(1) Expansion Joints", + "children": [], + "url": "https://2023.antflix.net#424.99_(B)_(1)" + }, + { + "body": "Heating panels and heating panel sets shall be connected to branch-circuit and supply wiring by wiring methods recognized in Chapter 3. [424.99_(B)_(2)](https://2023.antflix.net#424.99_(B)_(2))", + "displayTitle": "(2) Connection to Conductors", + "children": [], + "url": "https://2023.antflix.net#424.99_(B)_(2)" + }, + { + "body": "Heating panels and heating panel sets shall be firmly anchored to the floor using an adhesive or anchoring system identified for this use. [424.99_(B)_(3)](https://2023.antflix.net#424.99_(B)_(3))", + "displayTitle": "(3) Anchoring", + "children": [], + "url": "https://2023.antflix.net#424.99_(B)_(3)" + }, + { + "body": "After heating panels or heating panel sets are installed and inspected, they shall be permitted to be covered by a floor covering that has been identified by the heater manufacturer as being suitable for the installation. [424.99_(B)_(4)](https://2023.antflix.net#424.99_(B)_(4))", + "displayTitle": "(4) Coverings", + "children": [], + "url": "https://2023.antflix.net#424.99_(B)_(4)" + }, + { + "body": "In addition to the requirements in 210.8, branch circuits supplying the heating panel or heating panel sets shall have ground-fault circuit-interrupter protection for personnel. [424.99_(B)_(5)](https://2023.antflix.net#424.99_(B)_(5))", + "displayTitle": "(5) GFCI Protection", + "children": [], + "url": "https://2023.antflix.net#424.99_(B)_(5)" + }, + { + "body": "Excluding nonheating leads, grounding means, such as copper braid, metal sheath, or other approved means, shall be provided with or as an integral part of the heating panel or heating panel set. [424.99_(B)_(6)](https://2023.antflix.net#424.99_(B)_(6))", + "displayTitle": "(6) Grounding Braid or Sheath", + "children": [], + "url": "https://2023.antflix.net#424.99_(B)_(6)" + } + ], + "url": "https://2023.antflix.net#424.99_(B)" + } + ], + "url": "https://2023.antflix.net#424.99" + }, + { + "displayTitle": "Part X Low-Voltage Fixed Electric Space-Heating Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_0_X" + }, + { + "body": "Low-voltage fixed electric space-heating equipment shall consist of an isolating power supply, low-voltage heaters, and associated equipment that are all identified for use in dry locations. [424.100](https://2023.antflix.net#424.100)", + "displayTitle": "424.100 Scope", + "children": [], + "url": "https://2023.antflix.net#424.100" + }, + { + "displayTitle": "424.101 Energy Source", + "children": [ + { + "body": "The power unit shall be an isolating type with a rated output not exceeding 25 amperes, 30 volts (42.4 volts peak) ac, or 60 volts dc under all load conditions. [424.101_(A)](https://2023.antflix.net#424.101_(A))", + "displayTitle": "(A) Power Unit", + "children": [], + "url": "https://2023.antflix.net#424.101_(A)" + }, + { + "body": "Listed low-voltage fixed electric space-heating equipment shall be permitted to be supplied directly from an alternate energy source such as solar photovoltaic (PV) or wind power. When supplied from such a source, the source and any power conversion equipment between the source and the heating equipment and its supply shall be listed and comply with the applicable section of the NEC for the source used. The output of the source shall meet the limits of 424.101(A). [424.101_(B)](https://2023.antflix.net#424.101_(B))", + "displayTitle": "(B) Alternate Energy Sources", + "children": [], + "url": "https://2023.antflix.net#424.101_(B)" + } + ], + "url": "https://2023.antflix.net#424.101" + }, + { + "body": "Low-voltage fixed electric space-heating equipment shall be listed as a complete system. [424.102](https://2023.antflix.net#424.102)", + "displayTitle": "424.102 Listed Equipment", + "children": [], + "url": "https://2023.antflix.net#424.102" + }, + { + "displayTitle": "424.103 Installation", + "children": [ + { + "body": "Equipment shall be installed per the manufacturer's installation instructions. [424.103_(A)](https://2023.antflix.net#424.103_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#424.103_(A)" + }, + { + "body": "Secondary circuits shall not be grounded. [424.103_(B)](https://2023.antflix.net#424.103_(B))", + "displayTitle": "(B) Ground", + "children": [], + "url": "https://2023.antflix.net#424.103_(B)" + }, + { + "body": "Ground-fault protection shall not be required. [424.103_(C)](https://2023.antflix.net#424.103_(C))", + "displayTitle": "(C) Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#424.103_(C)" + } + ], + "url": "https://2023.antflix.net#424.103" + }, + { + "displayTitle": "424.104 Branch Circuit", + "children": [ + { + "body": "Equipment shall be permitted to be supplied from branch circuits rated not over 30 amperes. [424.104_(A)](https://2023.antflix.net#424.104_(A))", + "displayTitle": "(A)", + "children": [], + "url": "https://2023.antflix.net#424.104_(A)" + }, + { + "body": "The equipment shall be considered a continuous duty load. [424.104_(B)](https://2023.antflix.net#424.104_(B))", + "displayTitle": "(B)", + "children": [], + "url": "https://2023.antflix.net#424.104_(B)" + } + ], + "url": "https://2023.antflix.net#424.104" + } + ], + "url": "https://2023.antflix.net#424" + }, + { + "displayTitle": "Article 425 Fixed Resistance and Electrode Industrial Process Heating Equipment", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_63_I" + }, + { + "body": "This article covers fixed industrial process heating employing electric resistance or electrode heating technology. For the purpose of this article, heating equipment includes boilers, electrode boilers, duct heaters, strip heaters, immersion heaters, process air heaters, or other fixed electric equipment used for industrial process heating. [425.1](https://2023.antflix.net#425.1)", + "displayTitle": "425.1 Scope", + "children": [], + "url": "https://2023.antflix.net#425.1" + }, + { + "body": "Fixed industrial process heating equipment incorporating a hermetic refrigerant motor-compressor shall additionally comply with Table 425.3.\nTable 425.3 Other Articles\n\n\n\nEquipment\nArticle\n\n\n\n\nMotors, motor circuits, and controllers\n430\n\n\nAir-conditioning and refrigerating equipment\n440 (Parts I through IV)\n\n\n [425.3](https://2023.antflix.net#425.3)", + "displayTitle": "425.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#425.3" + }, + { + "displayTitle": "425.4 Branch Circuits", + "children": [ + { + "body": "An individual branch circuit shall be permitted to supply any volt-ampere or wattage rating of fixed industrial process heating equipment for which the branch circuit is rated. [425.4_(A)](https://2023.antflix.net#425.4_(A))", + "displayTitle": "(A) Branch-Circuit Requirements", + "children": [], + "url": "https://2023.antflix.net#425.4_(A)" + }, + { + "body": "Fixed industrial process heating equipment and motors shall be considered continuous loads. [425.4_(B)](https://2023.antflix.net#425.4_(B))", + "displayTitle": "(B) Branch-Circuit Sizing", + "children": [], + "url": "https://2023.antflix.net#425.4_(B)" + } + ], + "url": "https://2023.antflix.net#425.4" + }, + { + "body": "Fixed industrial process heating equipment shall be listed. [425.6](https://2023.antflix.net#425.6)", + "displayTitle": "425.6 Listed Equipment", + "children": [], + "url": "https://2023.antflix.net#425.6" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_63_II" + }, + { + "displayTitle": "425.10 General", + "children": [ + { + "body": "Fixed industrial process heating equipment shall be accessible. [425.10_(A)](https://2023.antflix.net#425.10_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#425.10_(A)" + }, + { + "body": "Working space about electrical enclosures for fixed industrial process heating equipment that require examination, adjustment, servicing, or maintenance while energized shall be accessible, and the work space for personnel shall comply with 110.26 and 110.34, based upon the utilization voltage to ground. Exception: With special permission, in industrial establishments only, where conditions of maintenance and supervision ensure that only qualified persons will service the installation, working space less than that required in 110.26 or 110.34 shall be permitted, [425.10_(B)](https://2023.antflix.net#425.10_(B))", + "displayTitle": "(B) Working Space", + "children": [], + "url": "https://2023.antflix.net#425.10_(B)" + }, + { + "body": "Where the enclosure is located above grade, the floor, or a work platform, all of the following shall apply: The enclosure shall be accessible.The width of the working space shall be the width of the enclosure or a minimum of 762 mm (30 in.), whichever is greater.The depth of the workspace shall comply with 110.26(A) or 110.34 based upon the voltage to ground.All doors or hinged panels shall open to at least 90 degrees. [425.10_(C)](https://2023.antflix.net#425.10_(C))", + "displayTitle": "(C) Above Grade Level, Floor, or Work Platform", + "children": [], + "url": "https://2023.antflix.net#425.10_(C)" + } + ], + "url": "https://2023.antflix.net#425.10" + }, + { + "body": "Fixed industrial process heating equipment requiring supply conductors with over 60\u00b0C insulation shall be clearly and permanently marked. This marking shall be plainly visible after installation and shall be permitted to be adjacent to the field connection box. [425.11](https://2023.antflix.net#425.11)", + "displayTitle": "425.11 Supply Conductors", + "children": [], + "url": "https://2023.antflix.net#425.11" + }, + { + "displayTitle": "425.12 Locations", + "children": [ + { + "body": "Where subject to physical damage, fixed industrial process heating equipment shall be protected in an approved manner. [425.12_(A)](https://2023.antflix.net#425.12_(A))", + "displayTitle": "(A) Exposed to Physical Damage", + "children": [], + "url": "https://2023.antflix.net#425.12_(A)" + }, + { + "body": "Fixed industrial process heating equipment installed in damp or wet locations shall be listed for such locations and shall be constructed and installed so that water or other liquids cannot enter or accumulate in or on wired sections, electrical components, or ductwork. Informational Note: See 110.11 for equipment exposed to deteriorating agents. [425.12_(B)](https://2023.antflix.net#425.12_(B))", + "displayTitle": "(B) Damp or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#425.12_(B)" + } + ], + "url": "https://2023.antflix.net#425.12" + }, + { + "body": "Fixed industrial process heating equipment shall be installed to provide the required spacing between the equipment and adjacent combustible material, unless it is listed to be installed in direct contact with combustible material. [425.13](https://2023.antflix.net#425.13)", + "displayTitle": "425.13 Spacing From Combustible Materials", + "children": [], + "url": "https://2023.antflix.net#425.13" + }, + { + "body": "In industrial occupancies, infrared industrial process heating equipment lampholders shall be permitted to be operated in series on circuits of over 150 volts to ground, provided the voltage rating of the lampholders is not less than the circuit voltage. Each section, panel, or strip carrying a number of infrared lampholders, including the terminal wiring of such section, panel, or strip, shall be considered as infrared industrial heating equipment. The terminal connection block of each assembly shall be considered an individual outlet. [425.14](https://2023.antflix.net#425.14)", + "displayTitle": "425.14 Infrared Lamp Industrial Heating Equipment", + "children": [], + "url": "https://2023.antflix.net#425.14" + }, + { + "displayTitle": "Part III Control and Protection of Fixed Industrial Process Heating Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_55_III" + }, + { + "body": "Means shall be provided to simultaneously disconnect the heater, motor controller(s), and supplementary overcurrent protective device(s) of all fixed industrial process heating equipment from all ungrounded conductors. Where heating equipment is supplied by more than one source, feeder, or branch circuit, the disconnecting means shall be grouped and identified as having multiple disconnecting means. Each disconnecting means shall simultaneously disconnect all ungrounded conductors that it controls. The disconnecting means specified in 425.19(A) and (B) shall have an ampere rating not less than 125 percent of the total load of the motors and the heaters and shall be capable of being locked in the open position in compliance with 110.25. [425.19](https://2023.antflix.net#425.19)", + "displayTitle": "425.19 Disconnecting Means", + "children": [ + { + "body": "The disconnecting means for fixed industrial process heating equipment with supplementary overcurrent protection shall be within sight from the supplementary overcurrent protective device(s), on the supply side of these devices, if fuses, and, in addition, shall comply with either 425.19(A)(1) or (A)(2). [425.19_(A)](https://2023.antflix.net#425.19_(A))", + "displayTitle": "(A) Heating Equipment With Supplementary Overcurrent Protection", + "children": [ + { + "body": "The disconnecting means specified in 425.19 or unit switches complying with 425.19(C) shall be permitted to serve as the required disconnecting means for both the motor controller(s) and heater under either of the following conditions: The disconnecting means provided is also within sight from the motor controller(s) and the heater.The disconnecting means is capable of being locked in the open position in compliance with 110.25. [425.19_(A)_(1)](https://2023.antflix.net#425.19_(A)_(1))", + "displayTitle": "(1) Heater Containing No Motor Rated over 1/8 Horsepower", + "children": [], + "url": "https://2023.antflix.net#425.19_(A)_(1)" + }, + { + "body": "The disconnecting means required by 425.19(A)(1) shall be permitted to serve as the required disconnecting means for both the motor controller(s) and heater under either of the following conditions: The disconnecting means is in sight from the motor controller(s) and the heater and complies with Part IX of Article 430.Motor(s) of more than 1/8 hp and the heater are provided with disconnecting means. The disconnecting means shall be permitted to be out of sight from the motor controller and shall be capable of being locked in the open position in compliance with 110.25. [425.19_(A)_(2)](https://2023.antflix.net#425.19_(A)_(2))", + "displayTitle": "(2) Heater Containing a Motor(s) Rated over 1/8 Horsepower", + "children": [], + "url": "https://2023.antflix.net#425.19_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#425.19_(A)" + }, + { + "displayTitle": "(B) Heating Equipment Without Supplementary Overcurrent Protection", + "children": [ + { + "body": "For fixed industrial process heating equipment without a motor rated over 1/8 hp, the branch-circuit switch or circuit breaker shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the heater, shall be permitted to be out of sight from the motor controller, and shall be capable of being locked in the open position in compliance with 110.25. [425.19_(B)_(1)](https://2023.antflix.net#425.19_(B)_(1))", + "displayTitle": "(1) Without Motor or with Motor Not over 1/8 Horsepower", + "children": [], + "url": "https://2023.antflix.net#425.19_(B)_(1)" + }, + { + "body": "For motor-driven fixed industrial process heating equipment with a motor rated over 1/8 hp, a disconnecting means shall be located within sight from the motor controller or shall be permitted to be out of sight from the motor controller and shall be capable of being locked in the open position in compliance with 110.25. [425.19_(B)_(2)](https://2023.antflix.net#425.19_(B)_(2))", + "displayTitle": "(2) Over 1/8 Horsepower", + "children": [], + "url": "https://2023.antflix.net#425.19_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#425.19_(B)" + }, + { + "body": "A unit switch(es) with a marked \"off\" position that is part of a fixed heater and disconnects all ungrounded conductors shall be permitted as the disconnecting means required by this article. The branch circuit switch or circuit breaker, where readily accessible for servicing of the fixed heater, shall be permitted as the other disconnecting means. [425.19_(C)](https://2023.antflix.net#425.19_(C))", + "displayTitle": "(C) Unit Switch(es) as Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#425.19_(C)" + } + ], + "url": "https://2023.antflix.net#425.19" + }, + { + "body": "Switches and circuit breakers used as disconnecting means shall be of the indicating type. [425.21](https://2023.antflix.net#425.21)", + "displayTitle": "425.21 Switch and Circuit Breaker to Be Indicating", + "children": [], + "url": "https://2023.antflix.net#425.21" + }, + { + "displayTitle": "425.22 Overcurrent Protection", + "children": [ + { + "body": "Fixed industrial process heating equipment, other than motor-operated equipment required to have additional overcurrent protection by Parts III and IV of Article 430 or Part III of Article 440, shall be permitted to be protected against overcurrent where supplied by one of the branch circuits in Part II of Article 210. [425.22_(A)](https://2023.antflix.net#425.22_(A))", + "displayTitle": "(A) Branch-Circuit Devices", + "children": [], + "url": "https://2023.antflix.net#425.22_(A)" + }, + { + "body": "Resistance-type heating elements in fixed industrial process heating equipment shall be protected at not more than 60 amperes. Equipment rated more than 48 amperes and employing such elements shall have the heating elements subdivided, and each subdivided load shall not exceed 48 amperes. Resistance-type heating elements in fixed industrial process heating equipment shall be permitted to be subdivided into circuits not exceeding 120 amperes and protected at not more than 150 amperes where one of the following is met:Elements are integral with and enclosed within a process heating surface.Elements are completely contained within an enclosure identified as suitable for this use.Elements are contained within an ASME-rated and stamped vessel.Where a subdivided load is less than 48 amperes, the rating of the supplementary overcurrent protective device shall comply with 425.4(B). A boiler employing resistance-type immersion heating elements contained in an ASME-rated and stamped vessel shall be permitted to comply with 425.72(A). [425.22_(B)](https://2023.antflix.net#425.22_(B))", + "displayTitle": "(B) Resistance Elements", + "children": [], + "url": "https://2023.antflix.net#425.22_(B)" + }, + { + "body": "The supplementary over-current protective devices for the subdivided loads specified in 425.22(B) shall comply with the following: Be factory installed within or on the heater enclosure or supplied for use with the heater as a separate assembly by the heater manufacturerBe accessible but not be required to be readily accessibleBe suitable for branch-circuit protectionInformational Note No. 1: See 240.10. Where cartridge fuses are used to provide this overcurrent protection, a single disconnecting means shall be permitted to be used for the several subdivided loads.Informational Note No. 2: See 240.10 for supplementary over-current protection.Informational Note No. 3: See 240.40 for disconnecting means for cartridge fuses in circuits of any voltage. [425.22_(C)](https://2023.antflix.net#425.22_(C))", + "displayTitle": "(C) Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#425.22_(C)" + }, + { + "body": "The conductors supplying the supplementary overcurrent protective devices shall be considered branch-circuit conductors. Where the heaters are rated 50 kW or more, the conductors supplying the supplementary overcurrent protective devices specified in 425.22(C) shall be permitted to be sized at not less than 100 percent of the nameplate rating of the heater, provided all of the following conditions are met:The heater is marked with a minimum conductor size.The conductors are not smaller than the marked minimum size.A temperature-actuated device controls the cyclic operation of the equipment. [425.22_(D)](https://2023.antflix.net#425.22_(D))", + "displayTitle": "(D) Supplying Supplementary Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#425.22_(D)" + }, + { + "body": "Field-wired conductors between the heater and the supplementary overcurrent protective devices for fixed industrial process heating equipment shall be sized at not less than 125 percent of the load served. The supplementary overcurrent protective devices specified in 425.22(C) shall protect these conductors in accordance with 240.4. Where the heaters are rated 50 kW or more, the ampacity of field-wired conductors between the heater and the supplementary overcurrent protective devices shall be permitted to be not less than 100 percent of the load of their respective subdivided circuits, provided all of the following conditions are met: The heater is marked with a minimum conductor size.The conductors are not smaller than the marked minimum size.A temperature-activated device controls the cyclic operation of the equipment. [425.22_(E)](https://2023.antflix.net#425.22_(E))", + "displayTitle": "(E) Conductors for Subdivided Loads", + "children": [], + "url": "https://2023.antflix.net#425.22_(E)" + } + ], + "url": "https://2023.antflix.net#425.22" + }, + { + "displayTitle": "Part IV Marking of Heating Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_14_IV" + }, + { + "displayTitle": "425.28 Nameplate", + "children": [ + { + "body": "Fixed industrial process heating equipment shall be provided with a nameplate identifying the manufacturer and the rating in volts and watts or in volts and amperes. Fixed industrial process heating equipment intended for use on alternating current only, direct current only, or both shall be marked to so indicate. The marking of equipment consisting of motors over 1/8 hp and other loads shall specify the rating of the motor in volts, amperes, and frequency and the heating load in volts and watts or in volts and amperes. [425.28_(A)](https://2023.antflix.net#425.28_(A))", + "displayTitle": "(A) Marking Required", + "children": [], + "url": "https://2023.antflix.net#425.28_(A)" + }, + { + "body": "This nameplate shall be located so as to be permanent and shall be visible or accessible after installation. [425.28_(B)](https://2023.antflix.net#425.28_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#425.28_(B)" + } + ], + "url": "https://2023.antflix.net#425.28" + }, + { + "body": "All heating elements that are replaceable in the field and are part of industrial process heating equipment shall be legibly marked with the ratings in volts and watts or in volts and amperes. [425.29](https://2023.antflix.net#425.29)", + "displayTitle": "425.29 Marking of Heating Elements", + "children": [], + "url": "https://2023.antflix.net#425.29" + }, + { + "body": "Concealed fixed industrial heating equipment installations shall be made with due care to prevent damage to the heating equipment and shall be inspected and approved before heating equipment is covered or concealed. [425.45](https://2023.antflix.net#425.45)", + "displayTitle": "425.45 Concealed Fixed Industrial Heating Equipment - Inspection", + "children": [], + "url": "https://2023.antflix.net#425.45" + }, + { + "displayTitle": "Part V Fixed Industrial Process Duct Heaters", + "children": [], + "url": "https://2023.antflix.net#divider_9_V" + }, + { + "body": "Part V shall apply to any heater mounted in the airstream of a forced-air system where the air-moving unit is not provided as an integral part of the equipment. [425.57](https://2023.antflix.net#425.57)", + "displayTitle": "425.57 General", + "children": [], + "url": "https://2023.antflix.net#425.57" + }, + { + "body": "Heaters installed in an air duct shall be identified as suitable for the installation. [425.58](https://2023.antflix.net#425.58)", + "displayTitle": "425.58 Identification", + "children": [], + "url": "https://2023.antflix.net#425.58" + }, + { + "body": "Means shall be provided to ensure uniform airflow over the face of the heater in accordance with the manufacturer's instructions. Informational Note: Some heaters installed within 1.2 m (4 ft) of the outlet of an air-moving device, elbows, baffle plates, or other obstructions in ductwork use turning vanes, pressure plates, or other devices on the inlet side of the duct heater to ensure an even distribution of air over the face of the heater. [425.59](https://2023.antflix.net#425.59)", + "displayTitle": "425.59 Airflow", + "children": [], + "url": "https://2023.antflix.net#425.59" + }, + { + "body": "Duct heaters intended for use with elevated inlet air temperature shall be identified as suitable for use at the elevated temperatures. [425.60](https://2023.antflix.net#425.60)", + "displayTitle": "425.60 Elevated Inlet Temperature", + "children": [], + "url": "https://2023.antflix.net#425.60" + }, + { + "body": "Means shall be provided to ensure that the fan circuit, where present, is energized when any heater circuit is energized. However, time- or temperature-controlled delay in energizing the fan motor shall be permitted. [425.63](https://2023.antflix.net#425.63)", + "displayTitle": "425.63 Fan Circuit Interlock", + "children": [], + "url": "https://2023.antflix.net#425.63" + }, + { + "body": "Each duct heater shall be provided with an integral, automatic-reset temperature-limiting control or controllers to de-energize the circuit or circuits. In addition, an integral independent supplementary control or controllers shall be provided in each duct heater that disconnects a sufficient number of conductors to interrupt heating element current flow. This device shall be manually resettable or replaceable. [425.64](https://2023.antflix.net#425.64)", + "displayTitle": "425.64 Limit Controls", + "children": [], + "url": "https://2023.antflix.net#425.64" + }, + { + "body": "Duct heater controller equipment shall be either accessible with the disconnecting means installed at or within sight from the controller or as permitted by 425.19(A). [425.65](https://2023.antflix.net#425.65)", + "displayTitle": "425.65 Location of Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#425.65" + }, + { + "displayTitle": "Part VI Fixed Industrial Process Resistance-Type Boilers", + "children": [], + "url": "https://2023.antflix.net#divider_6_VI" + }, + { + "body": "The provisions in Part VI of this article shall apply to boilers employing resistance-type heating elements. Electrode-type boilers shall not be considered as employing resistance-type heating elements. See Part VII of this article. [425.70](https://2023.antflix.net#425.70)", + "displayTitle": "425.70 Scope", + "children": [], + "url": "https://2023.antflix.net#425.70" + }, + { + "body": "Resistance-type boilers shall be identified as suitable for the installation. [425.71](https://2023.antflix.net#425.71)", + "displayTitle": "425.71 Identification", + "children": [], + "url": "https://2023.antflix.net#425.71" + }, + { + "displayTitle": "425.72 Overcurrent Protection", + "children": [ + { + "body": "A boiler employing resistance-type immersion heating elements contained in an ASME-rated and stamped vessel shall have the heating elements protected at not more than 150 amperes. Such a boiler rated more than 120 amperes shall have the heating elements subdivided into loads not exceeding 120 amperes. Where a subdivided load is less than 120 amperes, the rating of the overcurrent protective device shall comply with 425.4(B). [425.72_(A)](https://2023.antflix.net#425.72_(A))", + "displayTitle": "(A) Boiler Employing Resistance-Type Immersion Heating Elements in an ASME-Rated and Stamped Vessel", + "children": [], + "url": "https://2023.antflix.net#425.72_(A)" + }, + { + "body": "A boiler employing resistance-type heating elements not contained in an ASME-rated and stamped vessel shall have the heating elements protected at not more than 60 amperes. Such a boiler rated more than 48 amperes shall have the heating elements subdivided into loads not exceeding 48 amperes. Where a subdivided load is less than 48 amperes, the rating of the overcurrent protective device shall comply with 425.4(B). [425.72_(B)](https://2023.antflix.net#425.72_(B))", + "displayTitle": "(B) Boiler Employing Resistance-Type Heating Elements Rated More Than 48 Amperes and Not Contained in an ASME-Rated and Stamped Vessel", + "children": [], + "url": "https://2023.antflix.net#425.72_(B)" + }, + { + "body": "The supplementary overcurrent protective devices for the subdivided loads as required by 425.72(A) and (B) shall be as follows: Factory-installed within or on the boiler enclosure or provided as a separate assembly by the boiler manufacturer.Accessible, but need not be readily accessible. [425.72_(C)](https://2023.antflix.net#425.72_(C))", + "displayTitle": "(C) Supplementary Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#425.72_(C)" + }, + { + "body": "Where cartridge fuses are used to provide this overcurrent protection, a single disconnecting means shall be permitted for the several subdivided circuits. See 240.40. [425.72_(D)](https://2023.antflix.net#425.72_(D))", + "displayTitle": "(D) Suitable for Branch-Circuit Protection", + "children": [], + "url": "https://2023.antflix.net#425.72_(D)" + }, + { + "body": "The conductors supplying these supplementary overcurrent protective devices shall be considered branch-circuit conductors. Where the heaters are rated 50 kW or more, the conductors supplying the overcurrent protective device specified in 424.72(C) shall be permitted to be sized at not less than 100 percent of the nameplate rating of the heater, provided all of the following conditions are met: The heater is marked with a minimum conductor size.The conductors are not smaller than the marked minimum size.A temperature- or pressure-actuated device controls the cyclic operation of the equipment. [425.72_(E)](https://2023.antflix.net#425.72_(E))", + "displayTitle": "(E) Conductors Supplying Supplementary Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#425.72_(E)" + }, + { + "body": "Field-wired conductors between the heater and the supplementary overcurrent protective devices shall be sized at not less than 125 percent of the load served. The supplementary overcurrent protective devices specified in 425.72(C) shall protect these conductors in accordance with 240.4. Where the heaters are rated 50 kW or more, the ampacity of field-wired conductors between the heater and the supplementary overcurrent protective devices shall be permitted to be not less than 100 percent of the load of their respective subdivided circuits, provided all of the following conditions are met: The heater is marked with a minimum conductor size.The conductors are not smaller than the marked minimum size.A temperature-activated device controls the cyclic operation of the equipment. [425.72_(F)](https://2023.antflix.net#425.72_(F))", + "displayTitle": "(F) Conductors for Subdivided Loads", + "children": [], + "url": "https://2023.antflix.net#425.72_(F)" + } + ], + "url": "https://2023.antflix.net#425.72" + }, + { + "body": "Each boiler designed so that in normal operation there is no change in state of the heat transfer medium shall be equipped with a temperature-sensitive limiting means. It shall be installed to limit maximum liquid temperature and shall directly or indirectly disconnect all ungrounded conductors to the heating elements. Such means shall be in addition to a temperature-regulating system and other devices protecting the tank against excessive pressure. [425.73](https://2023.antflix.net#425.73)", + "displayTitle": "425.73 Overtemperature Limit Control", + "children": [], + "url": "https://2023.antflix.net#425.73" + }, + { + "body": "Each boiler designed so that in normal operation there is a change in state of the heat transfer medium from liquid to vapor shall be equipped with a pressure-sensitive limiting means. It shall be installed to limit maximum pressure and shall directly or indirectly disconnect all ungrounded conductors to the heating elements. Such means shall be in addition to a pressure-regulating system and other devices protecting the tank against excessive pressure. [425.74](https://2023.antflix.net#425.74)", + "displayTitle": "425.74 Overpressure Limit Control", + "children": [], + "url": "https://2023.antflix.net#425.74" + }, + { + "displayTitle": "Part VII Fixed Industrial Process Electrode-Type Boilers", + "children": [], + "url": "https://2023.antflix.net#divider_6_VII" + }, + { + "body": "The provisions in Part VII of this article shall apply to boilers for operation at 600 volts, nominal, or less, in which heat is generated by the passage of current between electrodes through the liquid being heated. [425.80](https://2023.antflix.net#425.80)", + "displayTitle": "425.80 Scope", + "children": [], + "url": "https://2023.antflix.net#425.80" + }, + { + "body": "Electrode-type boilers shall be identified as suitable for the installation. [425.81](https://2023.antflix.net#425.81)", + "displayTitle": "425.81 Identification", + "children": [], + "url": "https://2023.antflix.net#425.81" + }, + { + "body": "The size of branch-circuit conductors and overcurrent protective devices shall be calculated on the basis of 125 percent of the total load (motors not included). A contactor, relay, or other device, listed for continuous operation at 100 percent of its rating, shall be permitted to supply its full-rated load. See 210.19(A)(1), Exception No. 1. This section shall not apply to conductors that form an integral part of an approved boiler. Where an electrode boiler is rated 50 kW or more, the conductors supplying the boiler electrode(s) shall be permitted to be sized at not less than 100 percent of the nameplate rating of the electrode boiler, provided all the following conditions are met:The electrode boiler is marked with a minimum conductor size.The conductors are not smaller than the marked minimum size.A temperature- or pressure-actuated switch controls the cyclic operation of the equipment. [425.82](https://2023.antflix.net#425.82)", + "displayTitle": "425.82 Branch-Circuit Requirements", + "children": [], + "url": "https://2023.antflix.net#425.82" + }, + { + "body": "Each boiler, designed so that in normal operation there is no change in state of the heat transfer medium, shall be equipped with a temperature-sensitive limiting means. It shall be installed to limit maximum liquid temperature and shall directly or indirectly interrupt all current flow through the electrodes. Such means shall be in addition to the temperature regulating system and other devices protecting the tank against excessive pressure. [425.83](https://2023.antflix.net#425.83)", + "displayTitle": "425.83 Overtemperature Limit Control", + "children": [], + "url": "https://2023.antflix.net#425.83" + }, + { + "body": "Each boiler, designed so that in normal operation there is a change in state of the heat transfer medium from liquid to vapor, shall be equipped with a pressure-sensitive limiting means. It shall be installed to limit maximum pressure and shall directly or indirectly interrupt all current flow through the electrodes. Such means shall be in addition to a pressure-regulating system and other devices protecting the tank against excessive pressure. [425.84](https://2023.antflix.net#425.84)", + "displayTitle": "425.84 Overpressure Limit Control", + "children": [], + "url": "https://2023.antflix.net#425.84" + }, + { + "body": "Boilers designed such that fault currents do not pass through the pressure vessel, and the pressure vessel is electrically isolated from the electrodes, all exposed noncurrent-carrying metal parts, including the pressure vessel, supply, and return connecting piping, shall be connected to the equipment grounding conductor. For all other designs, the pressure vessel containing the electrodes shall be isolated and electrically insulated from ground. [425.85](https://2023.antflix.net#425.85)", + "displayTitle": "425.85 Grounding", + "children": [], + "url": "https://2023.antflix.net#425.85" + }, + { + "body": "All electrode-type boilers shall be marked to show the following: The manufacturer's name.The rating in volts, amperes, and kilowatts.The electrical supply required specifying frequency, number of phases, and number of wires.The marking \"Electrode-Type Process Heating Boiler.\"A warning marking, \"All Power Supplies Shall Be Disconnected Before Servicing, Including Servicing the Pressure Vessel.\"A field-applied warning marking or label shall comply with 110.21 (B). The markings shall be permanent and located so as to be visible after installation. [425.86](https://2023.antflix.net#425.86)", + "displayTitle": "425.86 Markings", + "children": [], + "url": "https://2023.antflix.net#425.86" + } + ], + "url": "https://2023.antflix.net#425" + }, + { + "displayTitle": "Article 426 Fixed Outdoor Electric Deicing and Snow-Melting Equipment", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_64_I" + }, + { + "body": "This article covers fixed outdoor electric deicing and snow-melting equipment and the installation of these systems. [426.1](https://2023.antflix.net#426.1)", + "displayTitle": "426.1 Scope", + "children": [ + { + "body": "Embedded in driveways, walks, steps, and other areas. [426.1_(A)](https://2023.antflix.net#426.1_(A))", + "displayTitle": "(A) Embedded", + "children": [], + "url": "https://2023.antflix.net#426.1_(A)" + }, + { + "body": "Exposed on drainage systems, bridge structures, roofs, and other structures. Informational Note: See ANSI/IEEE 515.1-2012, Standard for the Testing, Design, Installation and Maintenance of Electrical Resistance Trace Heating for Commercial Applications, for further information. See IEEE 844/CSA 293 series of standards for fixed outdoor electric deicing and snow-melting equipment. [426.1_(B)](https://2023.antflix.net#426.1_(B))", + "displayTitle": "(B) Exposed", + "children": [], + "url": "https://2023.antflix.net#426.1_(B)" + } + ], + "url": "https://2023.antflix.net#426.1" + }, + { + "body": "Cord-and-plug-connected fixed outdoor electric deicing and snow-melting equipment shall additionally comply with Table 426.3. Table 426.3 Other Articles Equipment Article Appliances 422 (Parts I, II, III, IV, V) [426.3](https://2023.antflix.net#426.3)", + "displayTitle": "426.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#426.3" + }, + { + "body": "Fixed outdoor electric deicing and snow-melting equipment shall be considered a continuous load. [426.4](https://2023.antflix.net#426.4)", + "displayTitle": "426.4 Continuous Load", + "children": [], + "url": "https://2023.antflix.net#426.4" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_64_II" + }, + { + "body": "Equipment for outdoor electric deicing and snow melting shall be identified as suitable for the environment and installed in accordance with the manufacturer's instructions. [426.10](https://2023.antflix.net#426.10)", + "displayTitle": "426.10 General", + "children": [], + "url": "https://2023.antflix.net#426.10" + }, + { + "body": "Electric heating equipment shall be installed in such a manner as to be afforded protection from physical damage. [426.11](https://2023.antflix.net#426.11)", + "displayTitle": "426.11 Use", + "children": [], + "url": "https://2023.antflix.net#426.11" + }, + { + "body": "External surfaces of outdoor electric deicing and snow-melting equipment that operate at temperatures exceeding 60\u00b0C (140\u00b0F) shall be physically guarded, isolated, or thermally insulated to protect against contact by personnel in the area. [426.12](https://2023.antflix.net#426.12)", + "displayTitle": "426.12 Thermal Protection", + "children": [], + "url": "https://2023.antflix.net#426.12" + }, + { + "body": "The presence of outdoor electric deicing and snow-melting equipment shall be evident by the posting of appropriate caution signs or markings where clearly visible. [426.13](https://2023.antflix.net#426.13)", + "displayTitle": "426.13 Identification", + "children": [], + "url": "https://2023.antflix.net#426.13" + }, + { + "displayTitle": "Part III Resistance Heating Elements", + "children": [], + "url": "https://2023.antflix.net#divider_56_III" + }, + { + "displayTitle": "426.20 Embedded Deicing and Snow-Melting Equipment", + "children": [ + { + "body": "Panels or units shall not exceed 1300 watts/m2 (120 watts/ft2) of heated area. [426.20_(A)](https://2023.antflix.net#426.20_(A))", + "displayTitle": "(A) Watt Density", + "children": [], + "url": "https://2023.antflix.net#426.20_(A)" + }, + { + "body": "The spacing between adjacent cable runs is dependent upon the rating of the cable and shall be not less than 25 mm (1 in.) on centers. [426.20_(B)](https://2023.antflix.net#426.20_(B))", + "displayTitle": "(B) Spacing", + "children": [], + "url": "https://2023.antflix.net#426.20_(B)" + }, + { + "body": "Units, panels, or cables shall be installed as follows: On a substantial concrete, masonry, or asphalt base at least 50 mm (2 in.) thick and have at least 38 mm (11/2 in.) of concrete, masonry, or asphalt applied over the units, panels, or cables; orThey shall be permitted to be installed over other identified bases and embedded within 90 mm (31/2 in.) of concrete, masonry, or asphalt but not less than 38 mm (11/2 in.) from the top surface; orEquipment that has been listed for other forms of installation shall be installed only in the manner for which it has been identified. [426.20_(C)](https://2023.antflix.net#426.20_(C))", + "displayTitle": "(C) Cover", + "children": [], + "url": "https://2023.antflix.net#426.20_(C)" + }, + { + "body": "Cables, units, and panels shall be secured in place by frames or spreaders or other approved means while the concrete, masonry, or asphalt finish is applied. [426.20_(D)](https://2023.antflix.net#426.20_(D))", + "displayTitle": "(D) Secured", + "children": [], + "url": "https://2023.antflix.net#426.20_(D)" + }, + { + "body": "Cables, units, and panels shall not be installed where they bridge expansion joints unless provision is made for expansion and contraction. [426.20_(E)](https://2023.antflix.net#426.20_(E))", + "displayTitle": "(E) Expansion and Contraction", + "children": [], + "url": "https://2023.antflix.net#426.20_(E)" + } + ], + "url": "https://2023.antflix.net#426.20" + }, + { + "displayTitle": "426.21 Exposed Deicing and Snow-Melting Equipment", + "children": [ + { + "body": "Heating element assemblies shall be secured to the surface being heated by identified means. [426.21_(A)](https://2023.antflix.net#426.21_(A))", + "displayTitle": "(A) Secured", + "children": [], + "url": "https://2023.antflix.net#426.21_(A)" + }, + { + "body": "Where the heating element is not in direct contact with the surface being heated, the design of the heater assembly shall be such that its temperature limitations shall not be exceeded. [426.21_(B)](https://2023.antflix.net#426.21_(B))", + "displayTitle": "(B) Overtemperature", + "children": [], + "url": "https://2023.antflix.net#426.21_(B)" + }, + { + "body": "Heating elements and assemblies shall not be installed where they bridge expansion joints unless provision is made for expansion and contraction. [426.21_(C)](https://2023.antflix.net#426.21_(C))", + "displayTitle": "(C) Expansion and Contraction", + "children": [], + "url": "https://2023.antflix.net#426.21_(C)" + }, + { + "body": "Where installed on flexible structures, the heating elements and assemblies shall have a flexural capability that is compatible with the structure. [426.21_(D)](https://2023.antflix.net#426.21_(D))", + "displayTitle": "(D) Flexural Capability", + "children": [], + "url": "https://2023.antflix.net#426.21_(D)" + } + ], + "url": "https://2023.antflix.net#426.21" + }, + { + "displayTitle": "426.22 Installation of Nonheating Leads for Embedded Equipment", + "children": [ + { + "body": "Except as permitted under 426.22(B), nonheating leads installed in concrete, masonry, or asphalt shall be provided with a grounding sheath or braid in accordance with 426.27 or shall be enclosed in rigid metal conduit, electrical metallic tubing, intermediate metal conduit, or other metal raceways. [426.22_(A)](https://2023.antflix.net#426.22_(A))", + "displayTitle": "(A) Grounding Sheath or Braid", + "children": [], + "url": "https://2023.antflix.net#426.22_(A)" + }, + { + "body": "The splice connection between the nonheating lead and heating element, within concrete, masonry, or asphalt, shall be located no less than 25 mm (1 in.) and no more than 150 mm (6 in.) from the metal raceway. The length of the nonheating lead from the metal raceway to the splice assembly shall be permitted to be provided without a grounding sheath or braid. Grounding continuity shall be maintained. [426.22_(B)](https://2023.antflix.net#426.22_(B))", + "displayTitle": "(B) Splice Connections", + "children": [], + "url": "https://2023.antflix.net#426.22_(B)" + }, + { + "body": "Insulating bushings shall be used in the concrete, masonry, or asphalt where the leads enter a metal raceway. [426.22_(C)](https://2023.antflix.net#426.22_(C))", + "displayTitle": "(C) Bushings", + "children": [], + "url": "https://2023.antflix.net#426.22_(C)" + }, + { + "body": "Leads shall be protected in expansion joints in accordance with 300.4(H) or installed in accordance with the manufacturer's instructions. [426.22_(D)](https://2023.antflix.net#426.22_(D))", + "displayTitle": "(D) Expansion and Contraction", + "children": [], + "url": "https://2023.antflix.net#426.22_(D)" + }, + { + "body": "Exposed nonheating leads shall be protected by raceways or other identified means. [426.22_(E)](https://2023.antflix.net#426.22_(E))", + "displayTitle": "(E) Emerging From Grade", + "children": [], + "url": "https://2023.antflix.net#426.22_(E)" + }, + { + "body": "Not less than 150 mm (6 in.) of free nonheating lead shall be within the junction box. [426.22_(F)](https://2023.antflix.net#426.22_(F))", + "displayTitle": "(F) Leads in Junction Boxes", + "children": [], + "url": "https://2023.antflix.net#426.22_(F)" + } + ], + "url": "https://2023.antflix.net#426.22" + }, + { + "displayTitle": "426.23 Installation of Nonheating Leads for Exposed Equipment", + "children": [ + { + "body": "Power supply nonheating leads (cold leads) for resistance elements shall be identified for the temperature encountered. Not less than 150 mm (6 in.) of nonheating leads shall be provided within the junction box. Preassembled factory-supplied and field-assembled nonheating leads on approved heaters shall be permitted to be shortened if the markings specified in 426.25 are retained. [426.23_(A)](https://2023.antflix.net#426.23_(A))", + "displayTitle": "(A) Nonheating Leads", + "children": [], + "url": "https://2023.antflix.net#426.23_(A)" + }, + { + "body": "Nonheating power supply leads shall be enclosed in a rigid conduit, intermediate metal conduit, electrical metallic tubing, or other approved means. [426.23_(B)](https://2023.antflix.net#426.23_(B))", + "displayTitle": "(B) Protection", + "children": [], + "url": "https://2023.antflix.net#426.23_(B)" + } + ], + "url": "https://2023.antflix.net#426.23" + }, + { + "displayTitle": "426.24 Electrical Connection", + "children": [ + { + "body": "Electrical connections, other than factory connections of heating elements to nonheating elements embedded in concrete, masonry, or asphalt or on exposed surfaces, shall be made with insulated connectors identified for the use. [426.24_(A)](https://2023.antflix.net#426.24_(A))", + "displayTitle": "(A) Heating Element Connections", + "children": [], + "url": "https://2023.antflix.net#426.24_(A)" + }, + { + "body": "Splices and terminations at the end of the nonheating leads, other than the heating element end, shall be installed in a box or fitting in accordance with 110.14 and 300.15. [426.24_(B)](https://2023.antflix.net#426.24_(B))", + "displayTitle": "(B) Circuit Connections", + "children": [], + "url": "https://2023.antflix.net#426.24_(B)" + } + ], + "url": "https://2023.antflix.net#426.24" + }, + { + "body": "Each factory-assembled heating unit shall be legibly marked within 75 mm (3 in.) of each end of the nonheating leads with the permanent identification symbol, catalog number, and ratings in volts and watts or in volts and amperes. [426.25](https://2023.antflix.net#426.25)", + "displayTitle": "426.25 Marking", + "children": [], + "url": "https://2023.antflix.net#426.25" + }, + { + "body": "Ferrous and nonferrous metal raceways, cable armor, cable sheaths, boxes, fittings, supports, and support hardware shall be permitted to be installed in concrete or in direct contact with the earth, or in areas subject to severe corrosive influences, where made of material suitable for the condition, or where provided with corrosion protection identified as suitable for the condition. [426.26](https://2023.antflix.net#426.26)", + "displayTitle": "426.26 Corrosion Protection", + "children": [], + "url": "https://2023.antflix.net#426.26" + }, + { + "body": "Grounding means, such as copper braid, metal sheath, or other approved means, shall be provided as part of the heated section of the cable, panel, or unit. [426.27](https://2023.antflix.net#426.27)", + "displayTitle": "426.27 Grounding Braid or Sheath", + "children": [], + "url": "https://2023.antflix.net#426.27" + }, + { + "body": "Ground-fault protection shall be provided for fixed outdoor electric deicing and snow-melting equipment. The trip level of ground-fault protection shall be as specified by the manufacturer. [426.28](https://2023.antflix.net#426.28)", + "displayTitle": "426.28 Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#426.28" + }, + { + "displayTitle": "Part IV Impedance Heating", + "children": [], + "url": "https://2023.antflix.net#divider_15_IV" + }, + { + "body": "Exposed elements of impedance heating systems shall be physically guarded, isolated, or thermally insulated with a weatherproof jacket to protect against contact by personnel in the area. [426.30](https://2023.antflix.net#426.30)", + "displayTitle": "426.30 Personnel Protection", + "children": [], + "url": "https://2023.antflix.net#426.30" + }, + { + "body": "An isolation transformer with a grounded shield between the primary and secondary windings shall be used to isolate the distribution system from the heating system. [426.31](https://2023.antflix.net#426.31)", + "displayTitle": "426.31 Isolation Transformer", + "children": [], + "url": "https://2023.antflix.net#426.31" + }, + { + "body": "The secondary winding of the isolation transformer connected to the impedance heating elements shall not have an output voltage greater than 30 volts ac. [426.32](https://2023.antflix.net#426.32)", + "displayTitle": "426.32 Voltage Limitations", + "children": [], + "url": "https://2023.antflix.net#426.32" + }, + { + "body": "All current-carrying components shall be installed in accordance with 300.20. [426.33](https://2023.antflix.net#426.33)", + "displayTitle": "426.33 Induced Currents", + "children": [], + "url": "https://2023.antflix.net#426.33" + }, + { + "displayTitle": "Part V Skin-Effect Heating", + "children": [], + "url": "https://2023.antflix.net#divider_10_V" + }, + { + "body": "The current through the electrically insulated conductor inside the ferromagnetic envelope shall be permitted to exceed the ampacity values shown in Table 310.16, provided it is identified as suitable for this use. [426.40](https://2023.antflix.net#426.40)", + "displayTitle": "426.40 Conductor Ampacity", + "children": [], + "url": "https://2023.antflix.net#426.40" + }, + { + "body": "Where pull boxes are used, they shall be accessible without excavation by location in suitable vaults or above grade. Outdoor pull boxes shall be of watertight construction. [426.41](https://2023.antflix.net#426.41)", + "displayTitle": "426.41 Pull Boxes", + "children": [], + "url": "https://2023.antflix.net#426.41" + }, + { + "body": "The provisions of 300.20 shall not apply to the installation of a single conductor in a ferromagnetic envelope (metal enclosure). [426.42](https://2023.antflix.net#426.42)", + "displayTitle": "426.42 Single Conductor in Enclosure", + "children": [], + "url": "https://2023.antflix.net#426.42" + }, + { + "body": "Ferromagnetic envelopes, ferrous or nonferrous metal raceways, boxes, fittings, supports, and support hardware shall be permitted to be installed in concrete or in direct contact with the earth, or in areas subjected to severe corrosive influences, where made of material suitable for the condition, or where provided with corrosion protection identified as suitable for the condition. Corrosion protection shall maintain the original wall thickness of the ferromagnetic envelope. [426.43](https://2023.antflix.net#426.43)", + "displayTitle": "426.43 Corrosion Protection", + "children": [], + "url": "https://2023.antflix.net#426.43" + }, + { + "body": "The ferromagnetic envelope shall be connected to an equipment grounding conductor at both ends; and, in addition, it shall be permitted to be connected to an equipment grounding conductor at intermediate points as required by its design. Section 250.30 shall not apply to the installation of skin-effect heating systems. [426.44](https://2023.antflix.net#426.44)", + "displayTitle": "426.44 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#426.44" + }, + { + "displayTitle": "Part VI Control and Protection", + "children": [], + "url": "https://2023.antflix.net#divider_7_VI" + }, + { + "displayTitle": "426.50 Disconnecting Means", + "children": [ + { + "body": "All fixed outdoor deicing and snow-melting equipment shall be provided with a means for simultaneous disconnection from all ungrounded conductors. Where readily accessible to the user of the equipment, the branch-circuit switch or circuit breaker shall be permitted to serve as the disconnecting means. The disconnecting means shall be of the indicating type and be capable of being locked in the open (off) position. [426.50_(A)](https://2023.antflix.net#426.50_(A))", + "displayTitle": "(A) Disconnection", + "children": [], + "url": "https://2023.antflix.net#426.50_(A)" + }, + { + "body": "The factory-installed attachment plug of cord-and-plug-connected equipment rated 20 amperes or less and 150 volts or less to ground shall be permitted to be the disconnecting means. [426.50_(B)](https://2023.antflix.net#426.50_(B))", + "displayTitle": "(B) Cord-and-Plug-Connected Equipment", + "children": [], + "url": "https://2023.antflix.net#426.50_(B)" + } + ], + "url": "https://2023.antflix.net#426.50" + }, + { + "displayTitle": "426.51 Controllers", + "children": [ + { + "body": "Temperature-controlled switching devices that indicate an \"off\" position and that interrupt line current shall open all ungrounded conductors when the control device is in the \"off\" position. These devices shall not be permitted to serve as the disconnecting means unless they are capable of being locked in the open position in compliance with 110.25. [426.51_(A)](https://2023.antflix.net#426.51_(A))", + "displayTitle": "(A) Temperature Controller With \"Off\" Position", + "children": [], + "url": "https://2023.antflix.net#426.51_(A)" + }, + { + "body": "Temperature controlled switching devices that do not have an \"off\" position shall not be required to open all ungrounded conductors and shall not be permitted to serve as the disconnecting means. [426.51_(B)](https://2023.antflix.net#426.51_(B))", + "displayTitle": "(B) Temperature Controller Without \"Off\" Position", + "children": [], + "url": "https://2023.antflix.net#426.51_(B)" + }, + { + "body": "Remote controlled temperature-actuated devices shall not be required to meet the requirements of 426.51(A). These devices shall not be permitted to serve as the disconnecting means. [426.51_(C)](https://2023.antflix.net#426.51_(C))", + "displayTitle": "(C) Remote Temperature Controller", + "children": [], + "url": "https://2023.antflix.net#426.51_(C)" + }, + { + "body": "Switching devices consisting of combined temperature-actuated devices and manually controlled switches that serve both as the controller and the disconnecting means shall comply with all of the following conditions: Open all ungrounded conductors when manually placed in the \"off\" positionBe so designed that the circuit cannot be energized automatically if the device has been manually placed in the \"off\" positionBe capable of being locked in the open position in compliance with 110.25 [426.51_(D)](https://2023.antflix.net#426.51_(D))", + "displayTitle": "(D) Combined Switching Devices", + "children": [], + "url": "https://2023.antflix.net#426.51_(D)" + } + ], + "url": "https://2023.antflix.net#426.51" + }, + { + "body": "Cord-and-plug-connected deicing and snow-melting equipment shall be listed. [426.54](https://2023.antflix.net#426.54)", + "displayTitle": "426.54 Cord-and-Plug-Connected Deicing and Snow-Melting Equipment", + "children": [], + "url": "https://2023.antflix.net#426.54" + } + ], + "url": "https://2023.antflix.net#426" + }, + { + "displayTitle": "Article 427 Fixed Electric Heating Equipment for Pipelines and Vessels", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_65_I" + }, + { + "body": "This article covers electrically energized heating systems and the installation of these systems used with pipelines and vessels. Informational Note: See IEEE 515-2017, Standard for the Testing, Design, Installation and Maintenance of Electrical Resistance Trace Heating for Industrial Applications, for further information. Also see applicable sections of the IEEE 844/CSA 293 series of standards for alternate technologies for fixed electric heating equipment for pipelines and vessels. [427.1](https://2023.antflix.net#427.1)", + "displayTitle": "427.1 Scope", + "children": [], + "url": "https://2023.antflix.net#427.1" + }, + { + "body": "Cord-connected pipe heating assemblies shall additionally comply with Table 427.3. Table 427.3 Other Articles Equipment Article Appliances 422 (Parts I, II, III, IV, V) [427.3](https://2023.antflix.net#427.3)", + "displayTitle": "427.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#427.3" + }, + { + "body": "Fixed electric heating equipment for pipelines and vessels shall be considered continuous load. [427.4](https://2023.antflix.net#427.4)", + "displayTitle": "427.4 Continuous Load", + "children": [], + "url": "https://2023.antflix.net#427.4" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_65_II" + }, + { + "body": "Equipment for pipeline and vessel electric heating shall be identified as being suitable for (1) the chemical, thermal, and physical environment and (2) installation in accordance with the manufacturer's drawings and instructions. [427.10](https://2023.antflix.net#427.10)", + "displayTitle": "427.10 General", + "children": [], + "url": "https://2023.antflix.net#427.10" + }, + { + "body": "Electric heating equipment shall be installed in such a manner as to be afforded protection from physical damage. [427.11](https://2023.antflix.net#427.11)", + "displayTitle": "427.11 Use", + "children": [], + "url": "https://2023.antflix.net#427.11" + }, + { + "body": "External surfaces of pipeline and vessel heating equipment that operate at temperatures exceeding 60\u00b0C (140\u00b0F) shall be physically guarded, isolated, or thermally insulated to protect against contact by personnel in the area. [427.12](https://2023.antflix.net#427.12)", + "displayTitle": "427.12 Thermal Protection", + "children": [], + "url": "https://2023.antflix.net#427.12" + }, + { + "body": "The presence of electrically heated pipelines, vessels, or both, shall be evident by the posting of appropriate caution signs or markings at intervals not exceeding 6 m (20 ft) along the pipeline or vessel and on or adjacent to equipment in the piping system that requires periodic servicing. [427.13](https://2023.antflix.net#427.13)", + "displayTitle": "427.13 Identification", + "children": [], + "url": "https://2023.antflix.net#427.13" + }, + { + "displayTitle": "Part III Resistance Heating Elements", + "children": [], + "url": "https://2023.antflix.net#divider_57_III" + }, + { + "body": "Heating element assemblies shall be secured to the surface being heated by means other than the thermal insulation. [427.14](https://2023.antflix.net#427.14)", + "displayTitle": "427.14 Secured", + "children": [], + "url": "https://2023.antflix.net#427.14" + }, + { + "body": "Where the heating element is not in direct contact with the pipeline or vessel being heated, means shall be provided to prevent overtemperature of the heating element unless the design of the heating assembly is such that its temperature limitations will not be exceeded. [427.15](https://2023.antflix.net#427.15)", + "displayTitle": "427.15 Not in Direct Contact", + "children": [], + "url": "https://2023.antflix.net#427.15" + }, + { + "body": "Heating elements and assemblies shall not be installed where they bridge expansion joints unless provisions are made for expansion and contraction. [427.16](https://2023.antflix.net#427.16)", + "displayTitle": "427.16 Expansion and Contraction", + "children": [], + "url": "https://2023.antflix.net#427.16" + }, + { + "body": "Where installed on flexible pipelines, the heating elements and assemblies shall have a flexural capability that is compatible with the pipeline. [427.17](https://2023.antflix.net#427.17)", + "displayTitle": "427.17 Flexural Capability", + "children": [], + "url": "https://2023.antflix.net#427.17" + }, + { + "displayTitle": "427.18 Power Supply Leads", + "children": [ + { + "body": "Power supply nonheating leads (cold leads) for resistance elements shall be suitable for the temperature encountered. Not less than 150 mm (6 in.) of nonheating leads shall be provided within the junction box. Preassembled factory-supplied and field-assembled nonheating leads on approved heaters shall be permitted to be shortened if the markings specified in 427.20 are retained. [427.18_(A)](https://2023.antflix.net#427.18_(A))", + "displayTitle": "(A) Nonheating Leads", + "children": [], + "url": "https://2023.antflix.net#427.18_(A)" + }, + { + "body": "Nonheating power supply leads shall be protected where they emerge from electrically heated pipeline or vessel heating units by rigid metal conduit, intermediate metal conduit, electrical metallic tubing, or other raceways identified as suitable for the application. [427.18_(B)](https://2023.antflix.net#427.18_(B))", + "displayTitle": "(B) Power Supply Leads Protection", + "children": [], + "url": "https://2023.antflix.net#427.18_(B)" + }, + { + "body": "Interconnecting nonheating leads connecting portions of the heating system shall be permitted to be covered by thermal insulation in the same manner as the heaters. [427.18_(C)](https://2023.antflix.net#427.18_(C))", + "displayTitle": "(C) Interconnecting Leads", + "children": [], + "url": "https://2023.antflix.net#427.18_(C)" + } + ], + "url": "https://2023.antflix.net#427.18" + }, + { + "displayTitle": "427.19 Electrical Connections", + "children": [ + { + "body": "Nonheating interconnections, where required under thermal insulation, shall be made with insulated connectors identified as suitable for this use. [427.19_(A)](https://2023.antflix.net#427.19_(A))", + "displayTitle": "(A) Nonheating Interconnections", + "children": [], + "url": "https://2023.antflix.net#427.19_(A)" + }, + { + "body": "Splices and terminations outside the thermal insulation shall be installed in a box or fitting in accordance with 110.14 and 300.15. [427.19_(B)](https://2023.antflix.net#427.19_(B))", + "displayTitle": "(B) Circuit Connections", + "children": [], + "url": "https://2023.antflix.net#427.19_(B)" + } + ], + "url": "https://2023.antflix.net#427.19" + }, + { + "body": "Each factory-assembled heating unit shall be legibly marked within 75 mm (3 in.) of the termination end of all nonheating leads with the permanent identification symbol, catalog number, and ratings in volts and watts or in volts and amperes. [427.20](https://2023.antflix.net#427.20)", + "displayTitle": "427.20 Marking", + "children": [], + "url": "https://2023.antflix.net#427.20" + }, + { + "body": "Ground-fault protection of equipment shall be provided for electric heat tracing and heating panels. This requirement shall not apply in industrial establishments where there is alarm indication of ground faults and the following conditions apply: Conditions of maintenance and supervision ensure that only qualified persons service the installed systems.Continued circuit operation is necessary for safe operation of equipment or processes. [427.22](https://2023.antflix.net#427.22)", + "displayTitle": "427.22 Ground-Fault Protection of Equipment", + "children": [], + "url": "https://2023.antflix.net#427.22" + }, + { + "body": "Electric heating equipment shall be listed and have a grounded conductive covering in accordance with 427.23(A) or (B). The conductive covering shall provide an effective ground-fault current path for operation of ground-fault protection equipment. [427.23](https://2023.antflix.net#427.23)", + "displayTitle": "427.23 Grounded Conductive Covering", + "children": [ + { + "body": "Heating wires or cables shall have a grounded conductive covering that surrounds the heating element and bus wires, if any, and their electrical insulation. [427.23_(A)](https://2023.antflix.net#427.23_(A))", + "displayTitle": "(A) Heating Wires or Cables", + "children": [], + "url": "https://2023.antflix.net#427.23_(A)" + }, + { + "body": "Heating panels shall have a grounded conductive covering over the heating element and its electrical insulation on the side opposite the side attached to the surface to be heated. [427.23_(B)](https://2023.antflix.net#427.23_(B))", + "displayTitle": "(B) Heating Panels", + "children": [], + "url": "https://2023.antflix.net#427.23_(B)" + } + ], + "url": "https://2023.antflix.net#427.23" + }, + { + "displayTitle": "Part IV Impedance Heating", + "children": [], + "url": "https://2023.antflix.net#divider_16_IV" + }, + { + "body": "All accessible external surfaces of the pipeline, vessel, or both, being heated shall be physically guarded, isolated, or thermally insulated (with a weatherproof jacket for outside installations) to protect against contact by personnel in the area. [427.25](https://2023.antflix.net#427.25)", + "displayTitle": "427.25 Personnel Protection", + "children": [], + "url": "https://2023.antflix.net#427.25" + }, + { + "body": "A dual-winding transformer with a grounded shield between the primary and secondary windings shall be used to isolate the distribution system from the heating system. [427.26](https://2023.antflix.net#427.26)", + "displayTitle": "427.26 Isolation Transformer", + "children": [], + "url": "https://2023.antflix.net#427.26" + }, + { + "body": "The secondary winding of the isolation transformer connected to the pipeline or vessel being heated shall not have an output voltage greater than 30 volts ac. Exception No. 1: In industrial establishments, the isolation transformer connected to the pipeline or vessel being heated shall be permitted to have an output voltage greater than 30 but not more than 80 volts ac to ground where all of the following conditions apply: (1) Conditions of guarding, maintenance, and supervision ensure that only qualified persons have access to the installed systems. (2) Ground-fault protection of equipment is provided. Exception No. 2: In industrial establishments, the isolation transformer connected to the pipeline or vessel being heated shall be permitted to have an output voltage not greater than 132 volts ac to ground where all of the following conditions apply: (1) Conditions of guarding, maintenance, and supervision ensure that only qualified persons service the installed systems. (2) Ground-fault protection of equipment is provided. (3) The pipeline or vessel being heated is completely enclosed in a grounded metal enclosure. (4) The transformer secondary connections to the pipeline or vessel being heated are completely enclosed in a grounded metal mesh or metal enclosure. [427.27](https://2023.antflix.net#427.27)", + "displayTitle": "427.27 Voltage Limitations", + "children": [], + "url": "https://2023.antflix.net#427.27" + }, + { + "body": "All current-carrying components shall be installed in accordance with 300.20. [427.28](https://2023.antflix.net#427.28)", + "displayTitle": "427.28 Induced Currents", + "children": [], + "url": "https://2023.antflix.net#427.28" + }, + { + "body": "The pipeline, vessel, or both, that is being heated and operating at a voltage greater than 30 but not more than 80 shall be grounded at designated points. [427.29](https://2023.antflix.net#427.29)", + "displayTitle": "427.29 Grounding", + "children": [], + "url": "https://2023.antflix.net#427.29" + }, + { + "body": "The ampacity of the conductors connected to the secondary of the transformer shall be at least 100 percent of the total load of the heater. [427.30](https://2023.antflix.net#427.30)", + "displayTitle": "427.30 Secondary Conductor Sizing", + "children": [], + "url": "https://2023.antflix.net#427.30" + }, + { + "displayTitle": "Part V Induction Heating", + "children": [], + "url": "https://2023.antflix.net#divider_11_V" + }, + { + "body": "Induction coils that operate or may operate at a voltage greater than 30 volts ac shall be enclosed in a nonmetallic or split metallic enclosure, isolated, or made inaccessible by location to protect personnel in the area. [427.36](https://2023.antflix.net#427.36)", + "displayTitle": "427.36 Personnel Protection", + "children": [], + "url": "https://2023.antflix.net#427.36" + }, + { + "body": "Induction coils shall be prevented from inducing circulating currents in surrounding metallic equipment, supports, or structures by shielding, isolation, or insulation of the current paths. Stray current paths shall be bonded to prevent arcing. [427.37](https://2023.antflix.net#427.37)", + "displayTitle": "427.37 Induced Current", + "children": [], + "url": "https://2023.antflix.net#427.37" + }, + { + "displayTitle": "Part VI Skin-Effect Heating", + "children": [], + "url": "https://2023.antflix.net#divider_8_VI" + }, + { + "body": "The ampacity of the electrically insulated conductor inside the ferromagnetic envelope shall be permitted to exceed the values given in Table 310.16, provided it is identified as suitable for this use. [427.45](https://2023.antflix.net#427.45)", + "displayTitle": "427.45 Conductor Ampacity", + "children": [], + "url": "https://2023.antflix.net#427.45" + }, + { + "body": "Pull boxes for pulling the electrically insulated conductor in the ferromagnetic envelope shall be permitted to be buried under the thermal insulation, provided their locations are indicated by permanent markings on the insulation jacket surface and on drawings. For outdoor installations, pull boxes shall be of watertight construction. [427.46](https://2023.antflix.net#427.46)", + "displayTitle": "427.46 Pull Boxes", + "children": [], + "url": "https://2023.antflix.net#427.46" + }, + { + "body": "The provisions of 300.20 shall not apply to the installation of a single conductor in a ferromagnetic envelope (metal enclosure). [427.47](https://2023.antflix.net#427.47)", + "displayTitle": "427.47 Single Conductor in Enclosure", + "children": [], + "url": "https://2023.antflix.net#427.47" + }, + { + "body": "The ferromagnetic envelope shall be grounded at both ends, and, in addition, it shall be permitted to be grounded at intermediate points as required by its design. The ferromagnetic envelope shall be bonded at all joints to ensure electrical continuity. The provisions of 250.30 shall not apply to the installation of skin-effect heating systems. [427.48](https://2023.antflix.net#427.48)", + "displayTitle": "427.48 Grounding", + "children": [], + "url": "https://2023.antflix.net#427.48" + }, + { + "displayTitle": "Part VII Control and Protection", + "children": [], + "url": "https://2023.antflix.net#divider_7_VII" + }, + { + "displayTitle": "427.55 Disconnecting Means", + "children": [ + { + "body": "Means shall be provided to simultaneously disconnect all fixed electric pipeline or vessel heating equipment from all ungrounded conductors. The branch-circuit switch or circuit breaker, where readily accessible to the user of the equipment, shall be permitted to serve as the disconnecting means. The disconnecting means shall be of the indicating type and shall be capable of being locked in the open (off) position. The disconnecting means shall be installed in accordance with 110.25. [427.55_(A)](https://2023.antflix.net#427.55_(A))", + "displayTitle": "(A) Switch or Circuit Breaker", + "children": [], + "url": "https://2023.antflix.net#427.55_(A)" + }, + { + "body": "The factory-installed attachment plug of cord-and-plug-connected equipment rated 20 amperes or less and 150 volts or less to ground shall be permitted to be the disconnecting means. [427.55_(B)](https://2023.antflix.net#427.55_(B))", + "displayTitle": "(B) Cord-and-Plug-Connected Equipment", + "children": [], + "url": "https://2023.antflix.net#427.55_(B)" + } + ], + "url": "https://2023.antflix.net#427.55" + }, + { + "displayTitle": "427.56 Controls", + "children": [ + { + "body": "Temperature-controlled switching devices that indicate an \"off\" position and that interrupt line current shall open all ungrounded conductors when the control device is in this \"off\" position. These devices shall not be permitted to serve as the disconnecting means unless capable of being locked in the open position. [427.56_(A)](https://2023.antflix.net#427.56_(A))", + "displayTitle": "(A) Temperature Control With \"Off\" Position", + "children": [], + "url": "https://2023.antflix.net#427.56_(A)" + }, + { + "body": "Temperature controlled switching devices that do not have an \"off\" position shall not be required to open all ungrounded conductors and shall not be permitted to serve as the disconnecting means. [427.56_(B)](https://2023.antflix.net#427.56_(B))", + "displayTitle": "(B) Temperature Control Without \"Off\" Position", + "children": [], + "url": "https://2023.antflix.net#427.56_(B)" + }, + { + "body": "Remote controlled temperature-actuated devices shall not be required to meet the requirements of 427.56(A) and (B). These devices shall not be permitted to serve as the disconnecting means. [427.56_(C)](https://2023.antflix.net#427.56_(C))", + "displayTitle": "(C) Remote Temperature Controller", + "children": [], + "url": "https://2023.antflix.net#427.56_(C)" + }, + { + "body": "Switching devices consisting of combined temperature-actuated devices and manually controlled switches that serve both as the controllers and the disconnecting means shall comply with all the following conditions: Open all ungrounded conductors when manually placed in the \"off\" positionBe designed so that the circuit cannot be energized automatically if the device has been manually placed in the \"off\" positionBe capable of being locked in the open position [427.56_(D)](https://2023.antflix.net#427.56_(D))", + "displayTitle": "(D) Combined Switching Devices", + "children": [], + "url": "https://2023.antflix.net#427.56_(D)" + } + ], + "url": "https://2023.antflix.net#427.56" + }, + { + "body": "Heating equipment shall be considered protected against overcurrent where supplied by a branch circuit as specified in 210.20 and 210.24. [427.57](https://2023.antflix.net#427.57)", + "displayTitle": "427.57 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#427.57" + } + ], + "url": "https://2023.antflix.net#427" + }, + { + "displayTitle": "Article 430 Motors, Motor Circuits, and Controllers", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_66_I" + }, + { + "body": "This article covers motors, motor branch-circuit and feeder conductors and their protection, motor overload protection, motor control circuits, motor controllers, and motor control centers.\n\nInformational Note Figure 430.1 Article 430 Contents.\nInformational Note No. 1: See Informational Note Figure 430.1 for the arrangement of this article.\nInformational Note No. 2: See 110.26(E) for installation requirements for motor control centers.\nInformational Note No. 3: See 440.1 for air-conditioning and refrigerating equipment.\nInformational Note No. 4: See Part X for additional requirements for motors utilizing adjustable-speed drive systems.\nInformational Note No. 5: See Part XI for additional requirements for motors that operate over 1000 volts, nominal. [430.1](https://2023.antflix.net#430.1)", + "displayTitle": "430.1 Scope", + "children": [], + "url": "https://2023.antflix.net#430.1" + }, + { + "body": "Reconditioned motors shall be permitted if the reconditioning has been conducted in accordance with the manufacturer's instructions or, if no instructions are provided, nationally recognized standards. Reconditioned motors identified for use in hazardous (classified) locations shall be listed as reconditioned if installed in hazardous (classified) locations. Informational Note: See ANSI/EASA AR100-2020, Recommended Practice for the Repair of Rotating Electrical Apparatus, for information on the rewinding and repair of motors. [430.2](https://2023.antflix.net#430.2)", + "displayTitle": "430.2 Reconditioned Motors", + "children": [], + "url": "https://2023.antflix.net#430.2" + }, + { + "body": "Where separate overload devices are used with a standard part-winding start induction motor, each half of the motor winding shall be individually protected in accordance with 430.32 and 430.37 with a trip current one-half that specified.Each motor-winding connection shall have branch-circuit short-circuit and ground-fault protection rated at not more than one-half that specified by 430.52.\nException: A short-circuit and ground-fault protective device shall be permitted for both windings if the device will allow the motor to start. Where time-delay (dual-element) fuses are used, they shall be permitted to have a rating not exceeding 150 percent of the motor full-load current. [430.4](https://2023.antflix.net#430.4)", + "displayTitle": "430.4 Part-Winding Motors", + "children": [], + "url": "https://2023.antflix.net#430.4" + }, + { + "body": "Motors and controllers shall also comply with the applicable provisions of Table 430.5.Table 430.5 Other Articles\n\n\n\nEquipment/Occupancy\nArticle\nSection\n\n\n\n\nAir-conditioning and refrigerating equipment\n440\n \n\n\nCapacitors\n \n460.8, 460.9\n\n\nCommercial garages; aircraft hangars; motor fuel dispensing facilities; bulk storage plants; spray application, dipping, and coating processes; and inhalation anesthetizing locations\n511, 513, 514, 515, 516, and 517 Part IV\n \n\n\nCranes and hoists\n610\n \n\n\nElectrically driven or controlled irrigation machines\n675\n \n\n\nElevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts\n620\n \n\n\nFire pumps\n695\n \n\n\nHazardous (classified) locations\n500\u2014503, 505, and 506\n \n\n\nIndustrial machinery\n670\n \n\n\nMotion picture projectors\n \n540.11 and 540.20\n\n\nMotion picture and television studios and similar locations\n530\n \n\n\nResistors and reactors\n470\n \n\n\nTheaters, audience areas of motion picture and television studios, and similar locations\n \n520.48\n\n\nTransformers and transformer vaults\n450\n \n\n\n [430.5](https://2023.antflix.net#430.5)", + "displayTitle": "430.5 Other Articles", + "children": [], + "url": "https://2023.antflix.net#430.5" + }, + { + "body": "The size of conductors supplying equipment covered by this article shall be selected from the ampacity tables in 310.15 or shall be calculated in accordance with 310.14(B). Where flexible cord is used, the size of the conductor shall be selected in accordance with 400.5. The required conductor ampacity and motor ratings shall be determined in accordance with 430.6(A), (B), (C), and (D). [430.6](https://2023.antflix.net#430.6)", + "displayTitle": "430.6 Conductor Ampacity and Motor Rating Determination", + "children": [ + { + "body": "For general motor applications, current ratings shall be determined based on 430.6(A)(1) and (A)(2). [430.6_(A)](https://2023.antflix.net#430.6_(A))", + "displayTitle": "(A) General Motor Applications", + "children": [ + { + "body": "Other than for motors built for low speeds (less than 1200 RPM) or high torques, and for multispeed motors, the values given in Table 430.247, Table 430.248, Table 430.249, and Table 430.250 shall be used instead of the actual current rating marked on the motor nameplate to determine the following: Ampacity of conductorsCurrent ratings of switchesCurrent ratings of branch-circuit short-circuit and ground-fault protectionWhere a motor is marked in amperes, but not horsepower, the horsepower rating shall be assumed to be that corresponding to the value given in Table 430.247, Table 430.248, Table 430.249, and Table 430.250, interpolated if necessary.Exception No. 1: Multispeed motors shall be in accordance with 430.22(B) and 430.52.Exception No. 2: For equipment that employs a shaded-pole or permanent-split capacitor-type fan or blower motor that is marked with the motor type and the marking on the equipment nameplate is not less than the current marked on the fan or blower motor nameplate, the full-load current marked on the nameplate of the appliance shall be used to determine the ampacity of branch-circuit conductors in addition to the current ratings of the following:Disconnecting meansMotor controllersShort-circuit and ground-fault protective devicesSeparate overload protective devicesException No. 3: For a listed motor-operated appliance that is marked with both motor horsepower and full-load current, the motor full-load current marked on the nameplate of the appliance shall be used instead of the horsepower rating on the appliance nameplate to determine the ampacity of branch-circuit conductors in addition to the current ratings of the following:Disconnecting meansMotor controllersShort-circuit and ground-fault protective devicesSeparate overload protective devices [430.6_(A)_(1)](https://2023.antflix.net#430.6_(A)_(1))", + "displayTitle": "(1) Table Values", + "children": [], + "url": "https://2023.antflix.net#430.6_(A)_(1)" + }, + { + "body": "The motor nameplate current ratings shall be used to determine the values for the following: Separate motor overload protectionFor motors built for low speeds (less than 1200 RPM), high torques, canned pumps, or multispeed motors, the following:Ampacity of conductorsCurrent ratings of switchesCurrent ratings of branch-circuit short-circuit and ground-fault protectionLarge motors exceeding the values in Part XIV shall use the nameplate current rating for conductor sizing. [430.6_(A)_(2)](https://2023.antflix.net#430.6_(A)_(2))", + "displayTitle": "(2) Nameplate Values", + "children": [], + "url": "https://2023.antflix.net#430.6_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#430.6_(A)" + }, + { + "body": "For torque motors, the rated current shall be locked-rotor current, and this nameplate current shall be used to determine the ampacity of the branch-circuit conductors covered in 430.22 and 430.24, the current rating of the motor overload protection, and the current rating of motor branch-circuit short-circuit and ground-fault protection in accordance with 430.52(B). Informational Note: See 430.83(D) and 430.110 for information on motor controllers and disconnecting means. [430.6_(B)](https://2023.antflix.net#430.6_(B))", + "displayTitle": "(B) Torque Motors", + "children": [], + "url": "https://2023.antflix.net#430.6_(B)" + }, + { + "body": "For motors used in alternating-current, adjustable voltage, variable torque drive systems, the ampacity of conductors, or current ratings of switches, branch-circuit short-circuit and ground-fault protection, and so forth, shall be based on the maximum operating current marked on the motor nameplate or the control nameplate, or both. If the maximum operating current does not appear on the nameplate, the current rating determination shall be based on 150 percent of the values given in Table 430.249 and Table 430.250. [430.6_(C)](https://2023.antflix.net#430.6_(C))", + "displayTitle": "(C) Alternating-Current Adjustable Voltage Motors", + "children": [], + "url": "https://2023.antflix.net#430.6_(C)" + }, + { + "body": "For valve actuator motor assemblies (VAMs), the rated current shall be the name-plate full-load current, and this current shall be used to determine the maximum rating or setting of the motor branch-circuit short-circuit and ground-fault protective device and the ampacity of the conductors. [430.6_(D)](https://2023.antflix.net#430.6_(D))", + "displayTitle": "(D) Valve Actuator Motor Assemblies", + "children": [], + "url": "https://2023.antflix.net#430.6_(D)" + } + ], + "url": "https://2023.antflix.net#430.6" + }, + { + "displayTitle": "430.7 Marking on Motors and Multimotor Equipment", + "children": [ + { + "body": "A motor shall be marked with the following information: Manufacturer's name.Rated volts and full-load current. For a multispeed motor, full-load current for each speed, except shaded-pole and permanent-split capacitor motors where amperes are required only for maximum speed.Rated frequency and number of phases if an ac motor.Rated full-load speed.Rated temperature rise or the insulation system class and rated ambient temperature.Time rating. The time rating shall be 5, 15, 30, or 60 minutes, or continuous.Rated horsepower 1/8 hp or more. For a multispeed motor rated 1/8 hp or more, rated horsepower for each speed, except shaded-pole and permanent-split capacitor motors rated 1/8 hp or more where rated horsepower is required only for maximum speed. Motors of arc welders are not required to be marked with the horsepower rating.Code letter or locked-rotor amperes if an alternating-current motor rated 1/2 hp or more. On polyphase wound-rotor motors, the code letter shall be omitted.Informational Note No. 1: See 430.7(B).Design letter for design A, B, C, or D motors.Informational Note No. 2: See ANSI/NEMA MG 1-2016, Motors and Generators, Part 1, Definitions, for information on motor design letter definition.Secondary volts and full-load current if a wound-rotor induction motor.Field current and voltage for dc excited synchronous motors.Winding - straight shunt, stabilized shunt, compound, or series, if a dc motor. Fractional horsepower dc motors 175 mm (7 in.) or less in diameter shall not be required to be marked.A motor provided with a thermal protector complying with 430.32(A)(2) or (B)(2) shall be marked \"thermally protected.\" Thermally protected motors rated 100 watts or less and complying with 430.32(B)(2) shall be permitted to use the abbreviated marking \"T.P.\"A motor complying with 430.32(B)(4) shall be marked \"impedance protected.\" Impedance-protected motors rated 100 watts or less and complying with 430.32(B)(4) shall be permitted to use the abbreviated marking \"Z.P.\"Motors equipped with electrically powered condensation prevention heaters shall be marked with the rated heater voltage, number of phases, and the rated power in watts.Motors that are electronically protected from overloads in accordance with 430.32(A)(2) and (B)(2) shall be marked \"electronically protected\" or \"E.P.\" [430.7_(A)](https://2023.antflix.net#430.7_(A))", + "displayTitle": "(A) Usual Motor Applications", + "children": [], + "url": "https://2023.antflix.net#430.7_(A)" + }, + { + "body": "Code letters marked on motor nameplates to show motor input with locked rotor shall be in accordance with Table 430.7(B). The code letter indicating motor input with locked rotor shall be in an individual block on the nameplate, properly designated.Table 430.7(B) Locked-Rotor Indicating Code Letters \n\n\n\nCode Letter\nKilovolt-Amperes per Horsepower with Locked Rotor\n\n\n\n\nA\n0\u20143.14\n\n\nB\n3.15\u20143.54\n\n\nC\n3.55\u20143.99\n\n\nD\n4.0\u20144.49\n\n\nE\n4.5\u20144.99\n\n\nF\n5.0\u20145.59\n\n\nG\n5.6\u20146.29\n\n\nH\n6.3\u20147.09\n\n\nJ\n7.1\u20147.99\n\n\nK\n8.0\u20148.99\n\n\nL\n9.0\u20149.99\n\n\nM\n10.0\u201411.19\n\n\nN\n11.2\u201412.49\n\n\nP\n12.5\u201413.99\n\n\nR\n14.0\u201415.99\n\n\nS\n16.0\u201417.99\n\n\nT\n18.0\u201419.99\n\n\nU\n20.0\u201422.39\n\n\nV\n22.4 and up\n\n\n [430.7_(B)](https://2023.antflix.net#430.7_(B))", + "displayTitle": "(B) Locked-Rotor Indicating Code Letters", + "children": [ + { + "body": "Multispeed motors shall be marked with the code letter designating the locked-rotor kilovolt-ampere (kVA) per horsepower (hp) for the highest speed at which the motor can be started. Exception: Constant horsepower multispeed motors shall be marked with the code letter giving the highest locked-rotor kilovolt-ampere (kVA) per horsepower (hp). [430.7_(B)_(1)](https://2023.antflix.net#430.7_(B)_(1))", + "displayTitle": "(1) Multispeed Motors", + "children": [], + "url": "https://2023.antflix.net#430.7_(B)_(1)" + }, + { + "body": "Single-speed motors starting on wye connection and running on delta connections shall be marked with a code letter corresponding to the locked-rotor kilovolt-ampere (kVA) per horsepower (hp) for the wye connection. [430.7_(B)_(2)](https://2023.antflix.net#430.7_(B)_(2))", + "displayTitle": "(2) Single-Speed Motors", + "children": [], + "url": "https://2023.antflix.net#430.7_(B)_(2)" + }, + { + "body": "Dual-voltage motors that have a different locked-rotor kilovolt-ampere (kVA) per horsepower (hp) on the two voltages shall be marked with the code letter for the voltage giving the highest locked-rotor kilovolt-ampere (kVA) per horsepower (hp). [430.7_(B)_(3)](https://2023.antflix.net#430.7_(B)_(3))", + "displayTitle": "(3) Dual-Voltage Motors", + "children": [], + "url": "https://2023.antflix.net#430.7_(B)_(3)" + }, + { + "body": "Motors with 50- and 60-Hz ratings shall be marked with a code letter designating the locked-rotor kilovolt-ampere (kVA) per horsepower (hp) on 60 Hz. [430.7_(B)_(4)](https://2023.antflix.net#430.7_(B)_(4))", + "displayTitle": "(4) 50/60 Hz Motors", + "children": [], + "url": "https://2023.antflix.net#430.7_(B)_(4)" + }, + { + "body": "Part-winding start motors shall be marked with a code letter designating the locked-rotor kilovolt-ampere (kVA) per horsepower (hp) that is based on the locked-rotor current for the full winding of the motor. [430.7_(B)_(5)](https://2023.antflix.net#430.7_(B)_(5))", + "displayTitle": "(5) Part-Winding Motors", + "children": [], + "url": "https://2023.antflix.net#430.7_(B)_(5)" + } + ], + "url": "https://2023.antflix.net#430.7_(B)" + }, + { + "body": "Torque motors are rated for operation at standstill and shall be marked in accordance with 430.7(A), except that locked-rotor torque shall replace horsepower. [430.7_(C)](https://2023.antflix.net#430.7_(C))", + "displayTitle": "(C) Torque Motors", + "children": [], + "url": "https://2023.antflix.net#430.7_(C)" + }, + { + "displayTitle": "(D) Multimotor and Combination-Load Equipment", + "children": [ + { + "body": "Multimotor and combination-load equipment shall be provided with a visible nameplate marked with the manufacturer's name, the rating in volts, frequency, number of phases, minimum supply circuit conductor ampacity, and the maximum ampere rating of the circuit short-circuit and ground-fault protective device. The conductor ampacity shall be calculated in accordance with 430.24 and counting all of the motors and other loads that will be operated at the same time. The short-circuit and ground-fault protective device rating shall not exceed the value calculated in accordance with 430.53. Multimotor equipment for use on two or more circuits shall be marked with the preceding information for each circuit. [430.7_(D)_(1)](https://2023.antflix.net#430.7_(D)_(1))", + "displayTitle": "(1) Factory-Wired", + "children": [], + "url": "https://2023.antflix.net#430.7_(D)_(1)" + }, + { + "body": "Where the equipment is not factory-wired and the individual nameplates of motors and other loads are visible after assembly of the equipment, the individual nameplates shall be permitted to serve as the required marking. [430.7_(D)_(2)](https://2023.antflix.net#430.7_(D)_(2))", + "displayTitle": "(2) Not Factory-Wired", + "children": [], + "url": "https://2023.antflix.net#430.7_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#430.7_(D)" + } + ], + "url": "https://2023.antflix.net#430.7" + }, + { + "body": "A motor controller shall be marked with the manufacturer's name or identification, the voltage, the current or horsepower rating, the short-circuit current rating, and other necessary data to properly indicate the applications for which it is suitable. Exception No. 1: The short-circuit current rating is not required for motor controllers applied in accordance with 430.81(A) or (B). Exception No. 2: The short-circuit current rating is not required to be marked on the motor controller when the short-circuit current rating of the motor controller is marked elsewhere on the assembly. Exception No. 3: The short-circuit current rating is not required to be marked on the motor controller when the assembly into which it is installed has a marked short-circuit current rating. Exception No. 4: Short-circuit current ratings are not required for motor controllers rated less than 2 hp at 300 V or less and listed exclusively for general-purpose branch circuits. A motor controller that includes motor overload protection suitable for group motor application shall be marked with the motor overload protection and the maximum branch-circuit short-circuit and ground-fault protection for such applications. Combination motor controllers that employ adjustable instantaneous trip circuit breakers shall be clearly marked to indicate the ampere settings of the adjustable trip element. Where a motor controller is built in as an integral part of a motor or of a motor-generator set, individual marking of the motor controller shall not be required if the necessary data are on the nameplate. For motor controllers that are an integral part of equipment approved as a unit, the above marking shall be permitted on the equipment nameplate. Informational Note: See 110.10 for information on circuit impedance and other characteristics. [430.8](https://2023.antflix.net#430.8)", + "displayTitle": "430.8 Marking on Motor Controllers", + "children": [], + "url": "https://2023.antflix.net#430.8" + }, + { + "displayTitle": "430.9 Terminals", + "children": [ + { + "body": "Terminals of motors and controllers shall be suitably marked or colored where necessary to indicate the proper connections. [430.9_(A)](https://2023.antflix.net#430.9_(A))", + "displayTitle": "(A) Markings", + "children": [], + "url": "https://2023.antflix.net#430.9_(A)" + }, + { + "body": "Motor controllers and terminals of control circuit devices shall be connected with copper conductors unless identified for use with a different conductor. [430.9_(B)](https://2023.antflix.net#430.9_(B))", + "displayTitle": "(B) Conductors", + "children": [], + "url": "https://2023.antflix.net#430.9_(B)" + }, + { + "body": "Control circuit devices with screw-type pressure terminals used with 14 AWG or smaller copper conductors shall be torqued to a minimum of 0.8 N-m (7 lb-in.) unless identified for a different torque value. [430.9_(C)](https://2023.antflix.net#430.9_(C))", + "displayTitle": "(C) Torque Requirements", + "children": [], + "url": "https://2023.antflix.net#430.9_(C)" + } + ], + "url": "https://2023.antflix.net#430.9" + }, + { + "displayTitle": "430.10 Wiring Space in Enclosures", + "children": [ + { + "body": "Enclosures for motor controllers and disconnecting means shall not be used as junction boxes, auxiliary gutters, or raceways for conductors feeding through or tapping off to the other apparatus unless designs are employed that provide adequate space for this purpose. Informational Note: See 312.8 for switch and overcurrent-device enclosures. [430.10_(A)](https://2023.antflix.net#430.10_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#430.10_(A)" + }, + { + "body": "Minimum wire-bending space within the enclosures for motor controllers shall be in accordance with Table 430.10(B) where measured in a straight line from the end of the lug or wire connector (in the direction the wire leaves the terminal) to the wall or barrier. Where alternate wire termination means are substituted for that supplied by the manufacturer of the motor controller, they shall be of a type identified by the manufacturer for use with the motor controller and shall not reduce the minimum wire-bending space. Table 430.10(B) Minimum Wire-Bending Space at the Terminals of Enclosed Motor Controllers Size of Wire (AWG or kcmil) Wires per Terminal* 1 2 mm in. mm in. 10 and smaller Not specified - - 8\u20146 38 11/2 - - 4\u20143 50 2 - - 2 65 21/2 - - 1 75 3 - - 1/0 125 5 125 5 2/0 150 6 150 6 3/0\u20144/0 175 7 175 7 250 200 8 200 8 300 250 10 250 10 350\u2014500 300 12 300 12 600\u2014700 350 14 400 16 750\u2014900 450 18 475 19 *Where provision for three or more wires per terminal exists, the minimum wire-bending space shall be in accordance with the requirements of 312.6(B). [430.10_(B)](https://2023.antflix.net#430.10_(B))", + "displayTitle": "(B) Wire-Bending Space in Enclosures", + "children": [], + "url": "https://2023.antflix.net#430.10_(B)" + } + ], + "url": "https://2023.antflix.net#430.10" + }, + { + "body": "Suitable guards or enclosures shall be provided to protect exposed current-carrying parts of motors and the insulation of motor leads where installed directly under equipment, or in other locations where dripping or spraying oil, water, or other liquid is capable of occurring, unless the motor is designed for the existing conditions. [430.11](https://2023.antflix.net#430.11)", + "displayTitle": "430.11 Protection Against Liquids", + "children": [], + "url": "https://2023.antflix.net#430.11" + }, + { + "displayTitle": "430.12 Motor Terminal Housings", + "children": [ + { + "body": "Where motors are provided with terminal housings, the housings shall be of metal and of substantial construction. Exception: In other than hazardous (classified) locations, substantial, nonmetallic, noncombustible housings shall be permitted, provided an internal grounding means between the motor frame and the equipment grounding connection is incorporated within the housing. [430.12_(A)](https://2023.antflix.net#430.12_(A))", + "displayTitle": "(A) Material", + "children": [], + "url": "https://2023.antflix.net#430.12_(A)" + }, + { + "body": "Where these terminal housings enclose wire-to-wire connections, they shall have minimum dimensions and usable volumes in accordance with Table 430.12(B).\nTable 430.12(B) Terminal Housings \u2014 Wire-to-Wire Connections\n\n\n\nMotors 275 mm (11 in.) in Diameter or Less\n\n\nHorsepower\nCover Opening Minimum Dimension\nUsable Volume Minimum\n\n\nmm\nin.\ncm3\nin.3\n\n\n\n\n1 and smallera\n41\n15/8\n170\n10.5\n\n\n11/2, 2, and 3b\n45\n13/4\n275\n16.8\n\n\n5 and 71/2\n50\n2\n365\n22.4\n\n\n10 and 15\n65\n21/2\n595\n36.4\n\n\n\nMotors Over 275 mm (11 in.) in Diameter - Alternating-Current Motors\n\n\n\nMaximum Full Load Current for 3-Phase Motors with Maximum of 12 Leads (Amperes)\nTerminal Box Cover Opening Minimum Dimension\nUsable Volume Minimum\nTypical Maximum Horsepower 3-Phase\n\n\nmm\nin.\ncm3\nin.3\n230 Volt\n460 Volt\n\n\n\n\n45\n65\n2.5\n595\n36.4\n15\n30\n\n\n70\n84\n3.3\n1,265\n77\n25\n50\n\n\n110\n100\n4.0\n2,295\n140\n40\n75\n\n\n160\n125\n5.0\n4,135\n252\n60\n125\n\n\n250\n150\n6.0\n7,380\n450\n100\n200\n\n\n400\n175\n7.0\n13,775\n840\n150\n300\n\n\n600\n200\n8.0\n25,255\n1540\n250\n500\n\n\n\nDirect-Current Motors\n\n\n\nMaximum Full-Load Current for Motors with Maximum of 6 Leads (Amperes)\nTerminal Box Minimum Dimensions\nUsable Volume Minimum\n\n\nmm\nin.\ncm3\nin.3\n\n\n\n\n68\n65\n2.5\n425\n26\n\n\n105\n84\n3.3\n900\n55\n\n\n165\n100\n4.0\n1,640\n100\n\n\n240\n125\n5.0\n2,950\n180\n\n\n375\n150\n6.0\n5,410\n330\n\n\n600\n175\n7.0\n9,840\n600\n\n\n900\n200\n8.0\n18,040\n1,100\n\n\n\nNote: Auxiliary leads for such items as brakes, thermostats, space heaters, and exciting fields shall be permitted to be neglected if their current-carrying area does not exceed 25 percent of the current-carrying area of the machine power leads.\naFor motors rated 1 hp and smaller, and with the terminal housing partially or wholly integral with the frame or end shield, the volume of the terminal housing shall not be less than 18.0 cm3 (1.1 in.3) per wire-to-wire connection. The minimum cover opening dimension is not specified.\nbFor motors rated 11/2, 2, and 3 hp, and with the terminal housing partially or wholly integral with the frame or end shield, the volume of the terminal housing shall not be less than 23.0 cm3 (1.4 in.3) per wire-to-wire connection. The minimum cover opening dimension is not specified. [430.12_(B)](https://2023.antflix.net#430.12_(B))", + "displayTitle": "(B) Dimensions and Space \u2014 Wire-to-Wire Connections", + "children": [], + "url": "https://2023.antflix.net#430.12_(B)" + }, + { + "body": "Where these terminal housings enclose rigidly mounted motor terminals, the terminal housing shall be of sufficient size to provide minimum terminal spacings and usable volumes in accordance with Table 430.12(C)(1) and Table 430.12(C)(2).Table 430.12(C)(1) Terminal Spacings - Fixed Terminals\n\n\n\nNominal Volts\nMinimum Spacing\n\n\nBetween Line Terminals\nBetween Line Terminals and Other Uninsulated Metal Parts\n\n\nmm\nin.\nmm\nin.\n\n\n\n\n250 or less\n6\n1/4\n6\n1/4\n\n\nOver 250 \u2014 1000\n10\n3/8\n10\n3/8\n\n\n\nTable 430.12(C)(2) Usable Volumes - Fixed Terminals\n\n\n\nPower-Supply Conductor Size (AWG)\nMinimum Usable Volume per Power-Supply Conductor\n\n\ncm3\nin.3\n\n\n\n\n14\n16\n1\n\n\n12 and 10\n20\n11/4\n\n\n8 and 6\n37\n21/4\n\n\n [430.12_(C)](https://2023.antflix.net#430.12_(C))", + "displayTitle": "(C) Dimensions and Space - Fixed Terminal Connections", + "children": [], + "url": "https://2023.antflix.net#430.12_(C)" + }, + { + "body": "For motors with larger ratings, greater number of leads, or larger wire sizes, or where motors are installed as a part of factory-wired equipment, without additional connection being required at the motor terminal housing during equipment installation, the terminal housing shall be of ample size to make connections, but the foregoing provisions for the volumes of terminal housings shall not be considered applicable. [430.12_(D)](https://2023.antflix.net#430.12_(D))", + "displayTitle": "(D) Large Wire or Factory Connections", + "children": [], + "url": "https://2023.antflix.net#430.12_(D)" + }, + { + "body": "A means for attachment of an equipment grounding conductor termination in accordance with 250.8 shall be provided at motor terminal housings for wire-to-wire connections or fixed terminal connections. The means for such connections shall be permitted to be located either inside or outside the motor terminal housing. Exception: Where a motor is installed as a part of factory-wired equipment that is required to be grounded and without additional connection being required at the motor terminal housing during equipment installation, a separate means for motor grounding at the motor terminal housing shall not be required. [430.12_(E)](https://2023.antflix.net#430.12_(E))", + "displayTitle": "(E) Equipment Grounding Connections", + "children": [], + "url": "https://2023.antflix.net#430.12_(E)" + } + ], + "url": "https://2023.antflix.net#430.12" + }, + { + "body": "Where wires pass through an opening in an enclosure, conduit box, or barrier, a bushing shall be used to protect the conductors from the edges of openings having sharp edges. The bushing shall have smooth, well-rounded surfaces where it may be in contact with the conductors. If used where oils, greases, or other contaminants may be present, the bushing shall be made of material not deleteriously affected.\nInformational Note: See 310.10(F) for conductors exposed to deteriorating agents. [430.13](https://2023.antflix.net#430.13)", + "displayTitle": "430.13 Bushing", + "children": [], + "url": "https://2023.antflix.net#430.13" + }, + { + "displayTitle": "430.14 Location of Motors", + "children": [ + { + "body": "Motors shall be located so that adequate ventilation is provided and so that maintenance, such as lubrication of bearings and replacing of brushes, can be readily accomplished. Exception: Ventilation shall not be required for submersible types of motors. [430.14_(A)](https://2023.antflix.net#430.14_(A))", + "displayTitle": "(A) Ventilation and Maintenance", + "children": [], + "url": "https://2023.antflix.net#430.14_(A)" + }, + { + "body": "Open motors that have commutators or collector rings shall be located or protected so that sparks cannot reach adjacent combustible material. Exception: Installation of these motors on wooden floors or supports shall be permitted. [430.14_(B)](https://2023.antflix.net#430.14_(B))", + "displayTitle": "(B) Open Motors", + "children": [], + "url": "https://2023.antflix.net#430.14_(B)" + } + ], + "url": "https://2023.antflix.net#430.14" + }, + { + "body": "In locations where dust or flying material collects on or in motors in such quantities as to seriously interfere with the ventilation or cooling of motors and thereby cause dangerous temperatures, suitable types of enclosed motors that do not overheat under the prevailing conditions shall be used. Informational Note: Especially severe conditions may require the use of enclosed pipe-ventilated motors, or enclosure in separate dusttight rooms, properly ventilated from a source of clean air. [430.16](https://2023.antflix.net#430.16)", + "displayTitle": "430.16 Exposure to Dust Accumulations", + "children": [], + "url": "https://2023.antflix.net#430.16" + }, + { + "body": "In determining compliance with 430.24, 430.53(B), and 430.53(C), the highest rated or smallest rated motor shall be based on the rated full-load current as selected from Table 430.247, Table 430.248, Table 430.249, and Table 430.250. [430.17](https://2023.antflix.net#430.17)", + "displayTitle": "430.17 Highest Rated or Smallest Rated Motor", + "children": [], + "url": "https://2023.antflix.net#430.17" + }, + { + "body": "The nominal value of the ac voltage being rectified shall be used to determine the voltage of a rectifier derived system. Exception: The nominal dc voltage of the rectifier shall be used if it exceeds the peak value of the ac voltage being rectified. [430.18](https://2023.antflix.net#430.18)", + "displayTitle": "430.18 Nominal Voltage of Rectifier Systems", + "children": [], + "url": "https://2023.antflix.net#430.18" + }, + { + "displayTitle": "Part II Motor Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#divider_66_II" + }, + { + "body": "Part II specifies ampacities of conductors that are capable of carrying the motor current without overheating under the conditions specified.\nPart II shall not apply to motor circuits rated over 1000 volts, nominal.\nInformational Note No. 1: See Part XI for motor circuits rated over 1000 volts, nominal.\nInformational Note No. 2: See 110.14(C) and 430.9(B) for equipment device terminal requirements. [430.21](https://2023.antflix.net#430.21)", + "displayTitle": "430.21 General", + "children": [], + "url": "https://2023.antflix.net#430.21" + }, + { + "body": "Conductors that supply a single motor used in a continuous duty application shall have an ampacity of not less than 125 percent of the motor full-load current rating, as determined by 430.6(A)(1), or not less than specified in 430.22(A) through (G). [430.22](https://2023.antflix.net#430.22)", + "displayTitle": "430.22 Single Motor", + "children": [ + { + "body": "For dc motors operating from a rectified power supply, the conductor ampacity on the input of the rectifier shall not be less than 125 percent of the rated input current to the rectifier. For dc motors operating from a rectified single-phase power supply, the conductors between the field wiring output terminals of the rectifier and the motor shall have an ampacity of not less than the following percentages of the motor full-load current rating: Where a rectifier bridge of the single-phase, half-wave type is used, 190 percent.Where a rectifier bridge of the single-phase, full-wave type is used, 150 percent. [430.22_(A)](https://2023.antflix.net#430.22_(A))", + "displayTitle": "(A) Direct-Current Motor-Rectifier Supplied", + "children": [], + "url": "https://2023.antflix.net#430.22_(A)" + }, + { + "body": "For a multispeed motor, the selection of branch-circuit conductors on the line side of the controller shall be based on the highest of the full-load current ratings shown on the motor nameplate. The ampacity of the branch-circuit conductors between the controller and the motor shall not be less than 125 percent of the current rating of the winding(s) that the conductors energize. [430.22_(B)](https://2023.antflix.net#430.22_(B))", + "displayTitle": "(B) Multispeed Motor", + "children": [], + "url": "https://2023.antflix.net#430.22_(B)" + }, + { + "body": "For a wye-start, delta-run connected motor, the ampacity of the branch-circuit conductors on the line side of the controller shall not be less than 125 percent of the motor full-load current as determined by 430.6(A)(1). The ampacity of the conductors between the controller and the motor shall not be less than 72 percent of the motor full-load current rating as determined by 430.6(A)(1). Informational Note: The individual motor circuit conductors of a wye-start, delta-run connected motor carry 58 percent of the rated load current. The multiplier of 72 percent is obtained by multiplying 58 percent by 1.25. [430.22_(C)](https://2023.antflix.net#430.22_(C))", + "displayTitle": "(C) Wye-Start, Delta-Run Motor", + "children": [], + "url": "https://2023.antflix.net#430.22_(C)" + }, + { + "body": "For a part-winding connected motor, the ampacity of the branch-circuit conductors on the line side of the controller shall not be less than 125 percent of the motor full-load current as determined by 430.6(A)(1). The ampacity of the conductors between the controller and the motor shall not be less than 62.5 percent of the motor full-load current rating as determined by 430.6(A)(1). Informational Note: The multiplier of 62.5 percent is obtained by multiplying 50 percent by 1.25. [430.22_(D)](https://2023.antflix.net#430.22_(D))", + "displayTitle": "(D) Part-Winding Motor", + "children": [], + "url": "https://2023.antflix.net#430.22_(D)" + }, + { + "body": "Conductors for a motor used in a short-time, intermittent, periodic, or varying duty application shall have an ampacity of not less than the percentage of the motor nameplate current rating shown in Table 430.22(E), unless the authority having jurisdiction grants special permission for conductors of lower ampacity. Table 430.22(E) Duty-Cycle Service Classification of Service Nameplate Current Rating Percentages 5-Minute Rated Motor 15-Minute Rated Motor 30- & 60-Minute Rated Motor Continuous Rated Motor Short-time duty operating valves, raising or lowering rolls, etc. 110 120 150 - Intermittent duty freight and passenger elevators, tool heads, pumps, drawbridges, turntables, etc. (for arc welders, see 630.11) 85 85 90 140 Periodic duty rolls, ore- and coal-handling machines, etc. 85 90 95 140 Varying duty 110 120 150 200 Note: Any motor application shall be considered as continuous duty unless the nature of the apparatus it drives is such that the motor will not operate continuously with load under any condition of use. [430.22_(E)](https://2023.antflix.net#430.22_(E))", + "displayTitle": "(E) Other Than Continuous Duty", + "children": [], + "url": "https://2023.antflix.net#430.22_(E)" + }, + { + "body": "The conductors between a stationary motor rated 1 hp or less and the separate terminal enclosure permitted in 430.245(B) shall be permitted to be smaller than 14 AWG but not smaller than 18 AWG, provided they have an ampacity as specified in 430.22. [430.22_(F)](https://2023.antflix.net#430.22_(F))", + "displayTitle": "(F) Separate Terminal Enclosure", + "children": [], + "url": "https://2023.antflix.net#430.22_(F)" + }, + { + "body": "Conductors for small motors shall not be smaller than 14 AWG unless otherwise permitted in 430.22(G)(1) or (G)(2). [430.22_(G)](https://2023.antflix.net#430.22_(G))", + "displayTitle": "(G) Conductors for Small Motors", + "children": [ + { + "body": "18 AWG individual copper conductors installed in a cabinet or enclosure, copper conductors that are part of a jacketed multiconductor cable assembly, or copper conductors in a flexible cord shall be permitted, under either of the following sets of conditions: The circuit supplies a motor with a full load current rating, as determined by 430.6(A)(1), of greater than 3.5 amperes, and less than or equal to 5 amperes, and all the following conditions are met:The circuit is protected in accordance with 430.52.The circuit is provided with maximum Class 10 or Class 10A overload protection in accordance with 430.32.Overcurrent protection is provided in accordance with 240.4(D)(1)(2).The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1), of 3.5 amperes or less, and all the following conditions are met:The circuit is protected in accordance with 430.52.The circuit is provided with maximum Class 20 overload protection in accordance with 430.32.Overcurrent protection is provided in accordance with 240.4(D)(1)(2). [430.22_(G)_(1)](https://2023.antflix.net#430.22_(G)_(1))", + "displayTitle": "(1) 18 AWG Copper", + "children": [], + "url": "https://2023.antflix.net#430.22_(G)_(1)" + }, + { + "body": "16 AWG individual copper conductors installed in a cabinet or enclosure, copper conductors that are part of a jacketed multiconductor cable assembly, or copper conductors in a flexible cord shall be permitted under either of the following sets of conditions: The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1), of greater than 5.5 amperes, and less than or equal to 8 amperes, and all the following conditions are met:The circuit is protected in accordance with 430.52.The circuit is provided with maximum Class 10 or Class 10A overload protection in accordance with 430.32.Overcurrent protection is provided in accordance with 240.4(D)(2)(2).The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1), of 5.5 amperes or less, and all the following conditions are met:The circuit is protected in accordance with 430.52.The circuit is provided with maximum Class 20 overload protection in accordance with 430.32.Overcurrent protection is provided in accordance with 240.4(D)(2)(2). [430.22_(G)_(2)](https://2023.antflix.net#430.22_(G)_(2))", + "displayTitle": "(2) 16 AWG Copper", + "children": [], + "url": "https://2023.antflix.net#430.22_(G)_(2)" + } + ], + "url": "https://2023.antflix.net#430.22_(G)" + } + ], + "url": "https://2023.antflix.net#430.22" + }, + { + "displayTitle": "430.23 Wound-Rotor Secondary", + "children": [ + { + "body": "For continuous duty, the conductors connecting the secondary of a wound-rotor ac motor to its controller shall have an ampacity not less than 125 percent of the full-load secondary current of the motor. [430.23_(A)](https://2023.antflix.net#430.23_(A))", + "displayTitle": "(A) Continuous Duty", + "children": [], + "url": "https://2023.antflix.net#430.23_(A)" + }, + { + "body": "For other than continuous duty, these conductors shall have an ampacity, in percent of full-load secondary current, not less than that specified in Table 430.22(E). [430.23_(B)](https://2023.antflix.net#430.23_(B))", + "displayTitle": "(B) Other Than Continuous Duty", + "children": [], + "url": "https://2023.antflix.net#430.23_(B)" + }, + { + "body": "Where the secondary resistor is separate from the controller, the ampacity of the conductors between controller and resistor shall not be less than that shown in Table 430.23(C).\nTable 430.23(C) Secondary Conductor\n\n\n\nResistor Duty Classification\nAmpacity of Conductor in Percent of Full-Load Secondary Current\n\n\n\n\nLight starting duty\n35\n\n\nHeavy starting duty\n45\n\n\nExtra-heavy starting duty\n55\n\n\nLight intermittent duty\n65\n\n\nMedium intermittent duty\n75\n\n\nHeavy intermittent duty\n85\n\n\nContinuous duty\n110\n\n\n [430.23_(C)](https://2023.antflix.net#430.23_(C))", + "displayTitle": "(C) Resistor Separate Front Controller", + "children": [], + "url": "https://2023.antflix.net#430.23_(C)" + } + ], + "url": "https://2023.antflix.net#430.23" + }, + { + "body": "Conductors supplying several motors, or a motor(s) and other load(s), shall have an ampacity not less than the sum of each of the following: 125 percent of the full-load current rating of the highest rated motor, as determined by 430.6(A)Sum of the full-load current ratings of all the other motors in the group, as determined by 430.6(A)100 percent of the noncontinuous non-motor load125 percent of the continuous non-motor load.Informational Note: See Informative Annex D, Example No. D8.Exception No. 1: Where one or more of the motors of the group are used for short-time, intermittent, periodic, or varying duty, the ampere rating of such motors to be used in the summation shall be determined in accordance with 430.22(E). For the highest rated motor, the greater of either the ampere rating from 430.22(E) or the largest continuous duty motor full-load current multiplied by 1.25 shall be used in the summation.Exception No. 2: The ampacity of conductors supplying motor-operated fixed electric space-heating equipment shall comply with 424.4(B).Exception No. 3: Where the circuitry is interlocked so as to prevent simultaneous operation of selected motors or other loads, the conductor ampacity shall be permitted to be based on the summation of the currents of the motors and other loads to be operated simultaneously that results in the highest total current. [430.24](https://2023.antflix.net#430.24)", + "displayTitle": "430.24 Several Motors or a Motor(s) and Other Load(s)", + "children": [], + "url": "https://2023.antflix.net#430.24" + }, + { + "body": "The ampacity of the conductors supplying multimotor and combination-load equipment shall not be less than the minimum circuit ampacity marked on the equipment in accordance with 430.7(D). Where the equipment is not factory-wired and the individual nameplates are visible in accordance with 430.7(D)(2), the conductor ampacity shall be determined in accordance with 430.24. [430.25](https://2023.antflix.net#430.25)", + "displayTitle": "430.25 Multimotor and Combination-Load Equipment", + "children": [], + "url": "https://2023.antflix.net#430.25" + }, + { + "body": "Where reduced heating of the conductors results from motors operating on duty-cycle, intermittently, or from all motors not operating at one time, the authority having jurisdiction may grant permission for feeder conductors to have an ampacity less than specified in 430.24, provided the conductors have sufficient ampacity for the maximum load determined in accordance with the sizes and number of motors supplied and the character of their loads and duties. Informational Note: Demand factors determined in the design of new facilities can often be validated against actual historical experience from similar installations. [430.26](https://2023.antflix.net#430.26)", + "displayTitle": "430.26 Feeder Demand Factor", + "children": [], + "url": "https://2023.antflix.net#430.26" + }, + { + "body": "Where capacitors are installed in motor circuits, conductors shall comply with 460.8 and 460.9. [430.27](https://2023.antflix.net#430.27)", + "displayTitle": "430.27 Capacitors With Motors", + "children": [], + "url": "https://2023.antflix.net#430.27" + }, + { + "body": "Feeder tap conductors shall have an ampacity not less than that required by Part II, shall terminate in a branch-circuit protective device, and, in addition, shall meet one of the following requirements: Be enclosed either by an enclosed controller or by a race-way, be not more than 3.0 m (10 ft) in length, and, for field installation, be protected by an overcurrent device on the line side of the tap conductor, the rating or setting of which shall not exceed 1000 percent of the tap conductor ampacityHave an ampacity of at least one-third that of the feeder conductors, be suitably protected from physical damage or enclosed in a raceway, and be not more than 7.5 m (25 ft) in lengthHave an ampacity not less than the feeder conductorsException: Feeder taps over 7.5 m (25 ft) long. In high-bay manufacturing buildings [over 11 m (35 ft) high at walls], where conditions of maintenance and supervision ensure that only qualified persons service the systems, conductors tapped to a feeder shall be permitted to be not over 7.5 m (25 ft) long horizontally and not over 30.0 m (100 ft) in total length where all of the following conditions are met:The ampacity of the tap conductors is not less than one-third that of the feeder conductors.The tap conductors terminate with a single circuit breaker or a single set of fuses complying with (1) Part IV, where the load-side conductors are a branch circuit, or (2) Part V, where the load-side conductors are a feeder.The tap conductors are suitably protected from physical damage and are installed in raceways.The tap conductors are continuous from end-to-end and contain no splices.The tap conductors shall be 6 AWG copper or 4 AWG aluminum or larger.The tap conductors shall not penetrate walls, floors, or ceilings.The tap shall not be made, less than 9.0 m (30 ft) from the floor. [430.28](https://2023.antflix.net#430.28)", + "displayTitle": "430.28 Feeder Taps", + "children": [], + "url": "https://2023.antflix.net#430.28" + }, + { + "body": "Conductors connecting the motor controller to separately mounted power accelerating and dynamic braking resistors in the armature circuit shall have an ampacity not less than the value calculated from Table 430.29 using motor full-load current. If an armature shunt resistor is used, the power accelerating resistor conductor ampacity shall be calculated using the total of motor full-load current and armature shunt resistor current. Armature shunt resistor conductors shall have an ampacity of not less than that calculated from Table 430.29 using rated shunt resistor current as full-load current. Table 430.29 Conductor Rating Factors for Power Resistors Time in Seconds Ampacity of Conductor in Percent of Full-Load Current On Off 5 75 35 10 70 45 15 75 55 15 45 65 15 30 75 15 15 85 Continuous Duty 110 [430.29](https://2023.antflix.net#430.29)", + "displayTitle": "430.29 Constant Voltage Direct-Current Motors - Power Resistors", + "children": [], + "url": "https://2023.antflix.net#430.29" + }, + { + "displayTitle": "Part III Motor and Branch-Circuit Overload Protection", + "children": [], + "url": "https://2023.antflix.net#divider_58_III" + }, + { + "body": "Part III specifies overload devices intended to protect motors, motor-control apparatus, and motor branch-circuit conductors against excessive heating due to motor overloads and failure to start. Informational Note No. 1: See Informative Annex D, Example D8. Informational Note No. 2: See Article 100 for the definition of Overload. [430.31](https://2023.antflix.net#430.31)", + "displayTitle": "430.31 General", + "children": [ + { + "body": "These provisions shall not require overload protection where a power loss would cause a hazard, such as in the case of fire pumps. Informational Note: See 695.7 for protection of fire pump supply conductors. [430.31_(A)](https://2023.antflix.net#430.31_(A))", + "displayTitle": "(A) Where Hazard Exists", + "children": [], + "url": "https://2023.antflix.net#430.31_(A)" + }, + { + "body": "Part III shall not apply to motor circuits rated over 1000 volts, nominal. Informational Note: See Part XI for over 1000 volts, nominal. [430.31_(B)](https://2023.antflix.net#430.31_(B))", + "displayTitle": "(B) Not Over 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#430.31_(B)" + } + ], + "url": "https://2023.antflix.net#430.31" + }, + { + "displayTitle": "430.32 Continuous-Duty Motors", + "children": [ + { + "body": "Each motor used in a continuous duty application and rated more than 1 hp shall be protected against overload by one of the means in 430.32(A)(1) through (A)(4). [430.32_(A)](https://2023.antflix.net#430.32_(A))", + "displayTitle": "(A) More Than 1 Horsepower", + "children": [ + { + "body": "A separate overload device that is responsive to motor current. This device shall be selected to trip or shall be rated at no more than the following percent of the motor nameplate full-load current rating: Motors with a marked service factor 1.15 or greater 125% Motors with a marked temperature rise 40\u00b0C or less 125% All other motors 115% Modification of this value shall be permitted as provided in 430.32(C). For a multispeed motor, each winding connection shall be considered separately. Where a separate motor overload device is connected so that it does not carry the total current designated on the motor nameplate, such as for wye-delta starting, the proper percentage of nameplate current applying to the selection or setting of the overload device shall be clearly designated on the equipment, or the manufacturer's selection table shall take this into account. Informational Note: See 460.9 for power factor correction capacitors that are installed on the load side of the motor overload device. [430.32_(A)_(1)](https://2023.antflix.net#430.32_(A)_(1))", + "displayTitle": "(1) Separate Overload Device", + "children": [], + "url": "https://2023.antflix.net#430.32_(A)_(1)" + }, + { + "body": "A thermal protector integral with the motor shall be approved for use with the motor it protects on the basis that it will prevent dangerous overheating of the motor due to overload and failure to start. An electronically protected motor shall be approved for use on the basis that it will prevent dangerous overheating due to the failure of the electronic control, overload, or failure to start the motor. The ultimate trip current of a thermally or electronically protected motor shall not exceed the following percentage of motor full-load current given in Table 430.248, Table 430.249, and Table 430.250: Motor full-load current 9 amperes or less 170% Motor full-load current from 9.1 to, and including, 20 amperes 156% Motor full-load current greater than 20 amperes 140% If the motor current-interrupting device is separate from the motor and its control circuit is operated by a protective device integral with the motor, it shall be arranged so that the opening of the control circuit will result in interruption of current to the motor. [430.32_(A)_(2)](https://2023.antflix.net#430.32_(A)_(2))", + "displayTitle": "(2) Thermal Protector or Electronically Protected", + "children": [], + "url": "https://2023.antflix.net#430.32_(A)_(2)" + }, + { + "body": "A protective device integral with a motor that will protect the motor against damage due to failure to start shall be permitted if the motor is part of an approved assembly that does not normally subject the motor to overloads. [430.32_(A)_(3)](https://2023.antflix.net#430.32_(A)_(3))", + "displayTitle": "(3) Integral With Motor", + "children": [], + "url": "https://2023.antflix.net#430.32_(A)_(3)" + }, + { + "body": "For motors larger than 1500 hp, a protective device having embedded temperature detectors that cause current to the motor to be interrupted when the motor attains a temperature rise greater than marked on the nameplate in an ambient temperature of 40\u00b0C. [430.32_(A)_(4)](https://2023.antflix.net#430.32_(A)_(4))", + "displayTitle": "(4) Larger Than 1500 Horsepower", + "children": [], + "url": "https://2023.antflix.net#430.32_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#430.32_(A)" + }, + { + "body": "Any motor of 1 hp or less that is started automatically shall be protected against overload by one of the following means. [430.32_(B)](https://2023.antflix.net#430.32_(B))", + "displayTitle": "(B) One Horsepower or Less, Automatically Started", + "children": [ + { + "body": "By a separate overload device following the requirements of 430.32(A)(1). For a multispeed motor, each winding connection shall be considered separately. Modification of this value shall be permitted as provided in 430.32(C). [430.32_(B)_(1)](https://2023.antflix.net#430.32_(B)_(1))", + "displayTitle": "(1) Separate Overload Device", + "children": [], + "url": "https://2023.antflix.net#430.32_(B)_(1)" + }, + { + "body": "A thermal protector integral with the motor shall be approved for use with the motor that it protects on the basis that it will prevent dangerous overheating of the motor due to overload and failure to start. An electronically protected motor shall be approved for use on the basis that it will prevent dangerous overheating due to the failure of the electronic control, overload, or failure to start the motor. Where the motor current-interrupting device is separate from the motor and its control circuit is operated by a protective device integral with the motor, it shall be arranged so that the opening of the control circuit results in interruption of current to the motor. [430.32_(B)_(2)](https://2023.antflix.net#430.32_(B)_(2))", + "displayTitle": "(2) Thermal Protector or Electronically Protected", + "children": [], + "url": "https://2023.antflix.net#430.32_(B)_(2)" + }, + { + "body": "A protective device integral with a motor that protects the motor against damage due to failure to start shall be permitted (1) if the motor is part of an approved assembly that does not subject the motor to overloads, or (2) if the assembly is also equipped with other safety controls (such as the safety combustion controls on a domestic oil burner) that protect the motor against damage due to failure to start. Where the assembly has safety controls that protect the motor, it shall be so indicated on the nameplate of the assembly where it will be visible after installation. [430.32_(B)_(3)](https://2023.antflix.net#430.32_(B)_(3))", + "displayTitle": "(3) Integral With Motor", + "children": [], + "url": "https://2023.antflix.net#430.32_(B)_(3)" + }, + { + "body": "If the impedance of the motor windings is sufficient to prevent overheating due to failure to start, the motor shall be permitted to be protected as specified in 430.32(D)(2)a. for manually started motors if the motor is part of an approved assembly in which the motor will limit itself so that it will not be dangerously overheated. Informational Note: Many ac motors of less than 1/20 hp, such as clock motors, series motors, and so forth, and also some larger motors such as torque motors, come within this classification. It does not include split-phase motors having automatic switches that disconnect the starting windings. [430.32_(B)_(4)](https://2023.antflix.net#430.32_(B)_(4))", + "displayTitle": "(4) Impedance-Protected", + "children": [], + "url": "https://2023.antflix.net#430.32_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#430.32_(B)" + }, + { + "body": "Where the sensing element or setting or sizing of the overload device selected in accordance with 430.32(A)(1) and 430.32(B)(1) is not sufficient to start the motor or to carry the load, higher size sensing elements or incremental settings or sizing shall be permitted to be used, provided the trip current of the overload device does not exceed the following percentage of motor nameplate full-load current rating: Motors with marked service factor 1.15 or greater 140% Motors with a marked temperature rise 40\u00b0C or less 140% All other motors 130% If not shunted during the starting period of the motor as provided in 430.35, the overload device shall have sufficient time delay to permit the motor to start and accelerate its load. Informational Note: A Class 20 overload relay will provide a longer motor acceleration time than a Class 10 or Class 10A overload relay. A Class 30 overload relay will provide a longer motor acceleration time than a Class 20 overload relay. Use of a higher class overload relay may preclude the need for selection of a higher trip current. [430.32_(C)](https://2023.antflix.net#430.32_(C))", + "displayTitle": "(C) Selection of Overload Device", + "children": [], + "url": "https://2023.antflix.net#430.32_(C)" + }, + { + "displayTitle": "(D) One Horsepower or Less, Nonautomatically Started", + "children": [ + { + "body": "Overload protection shall be in accordance with 430.32(B). [430.32_(D)_(1)](https://2023.antflix.net#430.32_(D)_(1))", + "displayTitle": "(1) Permanently Installed", + "children": [], + "url": "https://2023.antflix.net#430.32_(D)_(1)" + }, + { + "body": "Within Sight from Controller. Overload protection shall be permitted to be furnished by the branch-circuit short-circuit and ground-fault protective device; such device, however, shall not be larger than that specified in Part IV of Article 430.Exception: Any such motor shall be permitted on a nominal 120-volt branch circuit protected at not over 20 amperes.Not Within Sight from Controller. Overload protection shall be in accordance with 430.32(B). [430.32_(D)_(2)](https://2023.antflix.net#430.32_(D)_(2))", + "displayTitle": "(2) Not Permanently Installed", + "children": [], + "url": "https://2023.antflix.net#430.32_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#430.32_(D)" + }, + { + "body": "The secondary circuits of wound-rotor ac motors, including conductors, controllers, resistors, and so forth, shall be permitted to be protected against overload by the motor-overload device. [430.32_(E)](https://2023.antflix.net#430.32_(E))", + "displayTitle": "(E) Wound-Rotor Secondaries", + "children": [], + "url": "https://2023.antflix.net#430.32_(E)" + } + ], + "url": "https://2023.antflix.net#430.32" + }, + { + "body": "A motor used for a condition of service that is inherently short-time, intermittent, periodic, or varying duty, as illustrated by Table 430.22(E), shall be permitted to be protected against overload by the branch-circuit short-circuit and ground-fault protective device, provided the protective device rating or setting does not exceed that specified in Table 430.52(C)(1). Any motor application shall be considered to be for continuous duty unless the nature of the apparatus it drives is such that the motor cannot operate continuously with load under any condition of use. [430.33](https://2023.antflix.net#430.33)", + "displayTitle": "430.33 Intermittent and Similar Duty", + "children": [], + "url": "https://2023.antflix.net#430.33" + }, + { + "displayTitle": "430.35 Shunting During Starting Period", + "children": [ + { + "body": "For a nonautomatically started motor, the overload protection shall be permitted to be shunted or cut out of the circuit during the starting period of the motor if the device by which the overload protection is shunted or cut out cannot be left in the starting position and if fuses or inverse time circuit breakers rated or set at not over 400 percent of the full-load current of the motor are located in the circuit so as to be operative during the starting period of the motor. [430.35_(A)](https://2023.antflix.net#430.35_(A))", + "displayTitle": "(A) Nonautomatically Started", + "children": [], + "url": "https://2023.antflix.net#430.35_(A)" + }, + { + "body": "The motor overload protection shall not be shunted or cut out during the starting period if the motor is automatically started. Exception: The motor overload protection shall be permitted to be shunted or cut out during the starting period on an automatically started motor where the following apply: (1) The motor starting period exceeds the time delay of available motor overload protective devices, and (2) Listed means are provided to perform the following: a. Sense motor rotation and automatically prevent the shunting or cutout in the event that the motor fails to start, and b. Limit the time of overload protection shunting or cutout to less than the locked rotor time rating of the protected motor, and c. Provide for shutdown and manual restart if motor running condition is not reached. [430.35_(B)](https://2023.antflix.net#430.35_(B))", + "displayTitle": "(B) Automatically Started", + "children": [], + "url": "https://2023.antflix.net#430.35_(B)" + } + ], + "url": "https://2023.antflix.net#430.35" + }, + { + "body": "Where fuses are used for motor overload protection, a fuse shall be inserted in each ungrounded conductor and also in the grounded conductor if the supply system is 3-wire, 3-phase ac with one conductor grounded. [430.36](https://2023.antflix.net#430.36)", + "displayTitle": "430.36 Fuses \u2014 In Which Conductor", + "children": [], + "url": "https://2023.antflix.net#430.36" + }, + { + "body": "Where devices other than fuses are used for motor overload protection, Table 430.37 shall govern the minimum allowable number and location of overload units such as trip coils or relays. Table 430.37 Overload Units Kind of Motor Supply System Number and Location of Overload Units, Such as Trip Coils or Relays 1-phase ac or dc 2-wire, 1-phase ac or dc ungrounded 1 in either conductor 1-phase ac or dc 2-wire, 1-phase ac or dc, one conductor grounded 1 in ungrounded conductor 1-phase ac or dc 3-wire, 1-phase ac or dc, grounded neutral conductor 1 in either ungrounded conductor 1-phase ac Any 3-phase 1 in ungrounded conductor 2-phase ac 3-wire, 2-phase ac, ungrounded 2, one in each phase 2-phase ac 3-wire, 2-phase ac, one conductor grounded 2 in ungrounded conductors 2-phase ac 4-wire, 2-phase ac, grounded or ungrounded 2, one for each phase in ungrounded conductors 2-phase ac Grounded neutral or 5-wire, 2-phase ac, ungrounded 2, one for each phase in any ungrounded phase wire 3-phase ac Any 3-phase 3, one in each phase* *Exception: An overload unit in each phase shall not be required where overload protection is provided by other approved means. [430.37](https://2023.antflix.net#430.37)", + "displayTitle": "430.37 Devices Other Than Fuses \u2014 In Which Conductor", + "children": [], + "url": "https://2023.antflix.net#430.37" + }, + { + "body": "Motor overload devices, other than fuses or thermal protectors, shall simultaneously open a sufficient number of ungrounded conductors to interrupt current flow to the motor. [430.38](https://2023.antflix.net#430.38)", + "displayTitle": "430.38 Number of Conductors Opened by Overload Device", + "children": [], + "url": "https://2023.antflix.net#430.38" + }, + { + "body": "A motor controller shall also be permitted to serve as an overload device if the number of overload units complies with Table 430.37 and if these units are operative in both the starting and running position in the case of a dc motor, and in the running position in the case of an ac motor. [430.39](https://2023.antflix.net#430.39)", + "displayTitle": "430.39 Motor Controller as Overload Protection", + "children": [], + "url": "https://2023.antflix.net#430.39" + }, + { + "body": "Overload relays and other devices for motor overload protection that are not capable of opening short circuits or ground faults shall be protected by fuses or circuit breakers with ratings or settings in accordance with 430.52 or by a motor short-circuit protector in accordance with 430.52. Exception: Where approved for group installation and marked to indicate the maximum size of fuse or inverse time circuit breaker by which they must be protected, the overload devices shall be protected in accordance with this marking. [430.40](https://2023.antflix.net#430.40)", + "displayTitle": "430.40 Overload Relays", + "children": [], + "url": "https://2023.antflix.net#430.40" + }, + { + "body": "Overload protection for motors used on general-purpose branch circuits shall be provided as specified in 430.42(A), (B), (C), or (D). [430.42](https://2023.antflix.net#430.42)", + "displayTitle": "430.42 Motors on General-Purpose Branch Circuits", + "children": [ + { + "body": "One or more motors without individual overload protection shall be permitted to be connected to a general-purpose branch circuit only where the installation complies with the limiting conditions specified in 430.32(B), 430.32(D), and 430.53(A)(1) and (A)(2). [430.42_(A)](https://2023.antflix.net#430.42_(A))", + "displayTitle": "(A) Not Over 1 Horsepower", + "children": [], + "url": "https://2023.antflix.net#430.42_(A)" + }, + { + "body": "Motors of ratings larger than specified in 430.53(A) shall be permitted to be connected to general-purpose branch circuits only where each motor is protected by overload protection selected to protect the motor as specified in 430.32. Both the motor controller and the motor overload device shall be approved for group installation with the short-circuit and ground-fault protective device selected in accordance with 430.53. [430.42_(B)](https://2023.antflix.net#430.42_(B))", + "displayTitle": "(B) Over 1 Horsepower", + "children": [], + "url": "https://2023.antflix.net#430.42_(B)" + }, + { + "body": "Where a motor is connected to a branch circuit by means of an attachment plug and a receptacle or cord connector, and individual overload protection is omitted in accordance with 430.42(A), the rating of the attachment plug and receptacle or cord connector shall not exceed 15 amperes at 125 volts or 250 volts. Where individual overload protection is required in accordance with 430.42(B) for a motor or motor-operated appliance that is attached to the branch circuit through an attachment plug and a receptacle or cord connector, the overload device shall be an integral part of the motor or appliance. The rating of the attachment plug and receptacle or cord connector shall determine the rating of the circuit to which the motor can be connected, in accordance with 210.21(B). [430.42_(C)](https://2023.antflix.net#430.42_(C))", + "displayTitle": "(C) Cord-and-Plug-Connected", + "children": [], + "url": "https://2023.antflix.net#430.42_(C)" + }, + { + "body": "The branch-circuit short-circuit and ground-fault protective device protecting a circuit to which a motor or motor-operated appliance is connected shall have sufficient time delay to permit the motor to start and accelerate its load. [430.42_(D)](https://2023.antflix.net#430.42_(D))", + "displayTitle": "(D) Time Delay", + "children": [], + "url": "https://2023.antflix.net#430.42_(D)" + } + ], + "url": "https://2023.antflix.net#430.42" + }, + { + "body": "A motor overload device that can restart a motor automatically after overload tripping shall not be installed unless approved for use with the motor it protects. A motor overload device that can restart a motor automatically after overload tripping shall not be installed if automatic restarting of the motor can result in injury to persons. [430.43](https://2023.antflix.net#430.43)", + "displayTitle": "430.43 Automatic Restarting", + "children": [], + "url": "https://2023.antflix.net#430.43" + }, + { + "body": "If immediate automatic shutdown of a motor by a motor overload protective device(s) would introduce additional or increased hazard(s) to a person(s) and continued motor operation is necessary for safe shutdown of equipment or process, a motor overload sensing device(s) complying with Part III of this article shall be permitted to be connected to a supervised alarm instead of causing immediate interruption of the motor circuit, so that corrective action or an orderly shutdown can be initiated. [430.44](https://2023.antflix.net#430.44)", + "displayTitle": "430.44 Orderly Shutdown", + "children": [], + "url": "https://2023.antflix.net#430.44" + }, + { + "displayTitle": "Part IV Motor Branch-Circuit Short-Circuit and Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#divider_17_IV" + }, + { + "body": "Part IV specifies devices intended to protect the motor branch-circuit conductors, the motor control apparatus, and the motors against overcurrent due to short circuits or ground faults. The devices specified in Part IV do not include the types of devices required by 210.8, 230.95, and 590.6.\nInformational Note No. 1: See Informative Annex D, Example D8, for an example of motor branch-circuit short-circuit and ground-fault protection selection.\n\nPart IV shall not apply to motor circuits rated over 1000 volts, nominal.\nInformational Note No. 2: See Part XI for over 1000 volts, nominal. [430.51](https://2023.antflix.net#430.51)", + "displayTitle": "430.51 General", + "children": [], + "url": "https://2023.antflix.net#430.51" + }, + { + "displayTitle": "430.52 Rating or Setting for Individual Motor Circuit", + "children": [ + { + "body": "The motor branch-circuit short-circuit and ground-fault protective device shall comply with 430.52(B) and either 430.52(C) or (D), as applicable. [430.52_(A)](https://2023.antflix.net#430.52_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#430.52_(A)" + }, + { + "body": "The motor branch-circuit short-circuit and ground-fault protective device shall be capable of carrying the starting current of the motor. [430.52_(B)](https://2023.antflix.net#430.52_(B))", + "displayTitle": "(B) All Motors", + "children": [], + "url": "https://2023.antflix.net#430.52_(B)" + }, + { + "displayTitle": "(C) Rating or Setting", + "children": [ + { + "body": "A protective device that has a rating or setting not exceeding the value calculated according to the values given in Table 430.52(C)(1) shall be used unless otherwise permitted in 430.52(C)(1)(a) or (C)(1)(b). Where the values as determined by Table 430.52(C)(1) do not correspond to the standard ampere ratings and settings provided in 240.6, the next higher standard rating or setting shall be permitted.Where the rating specified in Table 430.52(C)(1), or the rating modified by 430.52(C)(1) (a), is not sufficient for the starting current of the motor, any of the following shall apply:The rating of a nontime-delay fuse not exceeding 600 amperes or a time-delay Class CC fuse shall be permitted to be increased but shall in no case exceed 400 percent of the full-load current.The rating of a time-delay (dual-element) fuse shall be permitted to be increased but shall in no case exceed 225 percent of the full-load current.The rating of an inverse time circuit breaker shall be permitted to be increased but shall in no case exceed 400 percent for full-load currents of 100 amperes or less or 300 percent for full-load currents greater than 100 amperes.The rating of a fuse of 601-6000 ampere classification shall be permitted to be increased but shall in no case exceed 300 percent of the full-load current.Informational Note: See Informative Annex D, Example D8, for an example of motor branch-circuit short-circuit and ground-fault rating and setting and Informational Note Figure 430.1 for an example location.\n\nTable 430.52(C)(1) Maximum Rating or Setting of Motor Branch-Circuit Short-Circuit and Ground-Fault Protective Devices\n\n\n\nType of Motor\nPercentage of Full-Load Current\n\n\nNontime Delay Fuse1\nDual Element (Time-Delay) Fuse1\nInstantaneous-Trip Breaker\nInverse Time Breaker2\n\n\n\n\nSingle-phase motors\n300\n175\n800\n250\n\n\nAC polyphase motors other than wound-rotor\n300\n175\n800\n250\n\n\nSquirrel cage - other than Design B energy-efficient - and Design B premium efficiency\n300\n175\n800\n250\n\n\nDesign B energy-efficient and Design B premium efficiency\n300\n175\n1100\n250\n\n\nSynchronous3\n300\n175\n800\n250\n\n\nWound-rotor\n150\n150\n800\n150\n\n\nDC (constant voltage)\n150\n150\n250\n150\n\n\n\nNote: See 430.54 for certain exceptions to the values specified.\n1The values in the Nontime Delay Fuse column apply to time-delay Class CC fuses.\n2The values given in the last column also cover the ratings of nonadjustable inverse time types of circuit breakers that can be modified as in 430.52(C)(1)(a) and (C)(1)(b).\n3Synchronous motors of the low-torque, low-speed type (usually 450 rpm or lower), such as those used to drive reciprocating compressors, pumps, and so forth, that start unloaded, do not require a fuse rating or circuit-breaker setting in excess of 200 percent of full-load current. [430.52_(C)_(1)](https://2023.antflix.net#430.52_(C)_(1))", + "displayTitle": "(1) In Accordance With Table 430.52(C)(1)", + "children": [], + "url": "https://2023.antflix.net#430.52_(C)_(1)" + }, + { + "body": "Where maximum branch-circuit short-circuit and ground-fault protective device ratings are shown in the manufacturer's overload relay table for use with a motor controller or are otherwise marked on the equipment, they shall not be exceeded even if higher values are allowed as shown above. [430.52_(C)_(2)](https://2023.antflix.net#430.52_(C)_(2))", + "displayTitle": "(2) Overload Relay Table", + "children": [], + "url": "https://2023.antflix.net#430.52_(C)_(2)" + }, + { + "body": "An instantaneous-trip circuit breaker shall be permitted if the conditions of 430.52(C)(3) (a) and (C)(3) (b) are met. Application. Instantaneous-trip circuit breakers shall be adjustable and part of a listed combination motor controller having coordinated motor overload and short-circuit and ground-fault protection in each conductor.Informational Note No. 1: Instantaneous-trip circuit breakers are also known as motor-circuit protectors (MCPs).Informational Note No. 2: For the purpose of this article, instantaneous-trip circuit breakers could include a damping means to accommodate a transient motor inrush current without nuisance tripping of the circuit breaker.Setting. The instantaneous-trip circuit breaker shall be adjusted to a setting in accordance with one of the following:No greater than the value specified in Table 430.52(C)(1)Where the value specified in Table 430.52(C)(1) is not sufficient for the starting current of the motor, one of the following settings shall be permitted:Motors other than design B energy-efficient and Design B premium efficiency motors shall be permitted to be increased but shall in no case exceed 1300 percent of the motor full-load current.Design B energy-efficient and Design B premium efficiency motors shall be permitted to be increased but shall in no case exceed 1700 percent of the motor full-load current.Where an engineering analysis determines the value is not sufficient for the starting current of the motor, it shall not be necessary to first apply the value specified in Table 430.52(C)(1).Informational Note No. 3: See NEMA MG 1-2016, Motors and Generators, Part 12.59 for additional information on the requirements for a motor to be classified \"energy efficient.\"Where the motor full-load current is 8 amperes or less, the setting of the instantaneous-trip circuit breaker with a continuous current rating of 15 amperes or less in a listed combination motor controller that provides coordinated motor branch-circuit overload and short-circuit and ground-fault protection shall be permitted to be increased to the value marked on the motor controller. [430.52_(C)_(3)](https://2023.antflix.net#430.52_(C)_(3))", + "displayTitle": "(3) Instantaneous-Trip Circuit Breaker", + "children": [], + "url": "https://2023.antflix.net#430.52_(C)_(3)" + }, + { + "body": "For a multispeed motor, a single short-circuit and ground-fault protective device shall be permitted for two or more windings of the motor if the rating of the protective device does not exceed the above applicable percentage of the nameplate rating of the smallest winding protected.Exception: For a multispeed motor, a single short-circuit and ground-fault protective device shall be permitted to be used and sized according to the full-load current of the highest current winding, where all of the following conditions are met:\n(1) Each winding is equipped with individual overload protection sized according to its full-load current.\n(2) The branch-circuit conductors supplying each winding are sized according to the full-load current of the highest full-load current winding.\n(3) The motor controller for each winding has a horsepower rating not less than that required for the winding having the highest horsepower rating. [430.52_(C)_(4)](https://2023.antflix.net#430.52_(C)_(4))", + "displayTitle": "(4) Multispeed Motor", + "children": [], + "url": "https://2023.antflix.net#430.52_(C)_(4)" + }, + { + "body": "Semiconductor fuses intended for the protection of electronic devices shall be permitted in lieu of devices listed in Table 430.52(C)(1) for power electronic devices, associated electromechanical devices (such as bypass contactors and isolation contactors), and conductors in a solid-state motor controller system if the marking for replacement fuses is provided adjacent to the fuses. [430.52_(C)_(5)](https://2023.antflix.net#430.52_(C)_(5))", + "displayTitle": "(5) Power Electronic Devices", + "children": [], + "url": "https://2023.antflix.net#430.52_(C)_(5)" + }, + { + "body": "A listed self-protected combination motor controller shall be permitted in lieu of the devices specified in Table 430.52(C)(1). Adjustable instantaneous-trip settings shall not exceed 1300 percent of the full-load motor current for other than Design B energy-efficient and Design B premium efficiency motors and not more than 1700 percent of the full-load motor current for Design B energy-efficient and Design B premium efficiency motors. Informational Note: Proper application of self-protected combination motor controllers on 3-phase systems, other than solidly grounded wye, particularly on corner grounded delta systems, considers the self-protected combination motor controllers' individual pole-interrupting capability. [430.52_(C)_(6)](https://2023.antflix.net#430.52_(C)_(6))", + "displayTitle": "(6) Self-Protected Combination Motor Controller", + "children": [], + "url": "https://2023.antflix.net#430.52_(C)_(6)" + }, + { + "body": "A motor short-circuit protector shall be permitted in lieu of devices listed in Table 430.52(C)(1) if the motor short-circuit protector is part of a listed combination motor controller having coordinated motor overload protection and short-circuit and ground-fault protection in each conductor and it will open the circuit at currents exceeding 1300 percent of the motor full-load current for other than Design B energy-efficient and Design B premium efficiency motors and 1700 percent of the motor full-load current for Design B energy-efficient and Design B premium efficiency motors. Informational Note: A motor short-circuit protector, as used in this section, is a fused device and is not an instantaneous-trip circuit breaker. [430.52_(C)_(7)](https://2023.antflix.net#430.52_(C)_(7))", + "displayTitle": "(7) Motor Short-Circuit Protector", + "children": [], + "url": "https://2023.antflix.net#430.52_(C)_(7)" + } + ], + "url": "https://2023.antflix.net#430.52_(C)" + }, + { + "body": "Torque motor branch circuits shall be protected at the motor nameplate current rating in accordance with 240.4(B). [430.52_(D)](https://2023.antflix.net#430.52_(D))", + "displayTitle": "(D) Torque Motors", + "children": [], + "url": "https://2023.antflix.net#430.52_(D)" + } + ], + "url": "https://2023.antflix.net#430.52" + }, + { + "body": "Two or more motors or one or more motors and other loads shall be permitted to be connected to the same branch circuit under conditions specified in 430.53(D) and in 430.53(A), (B), or (C). The branch-circuit protective device shall be fuses or inverse time circuit breakers. [430.53](https://2023.antflix.net#430.53)", + "displayTitle": "430.53 Several Motors or Loads on One Branch Circuit", + "children": [ + { + "body": "Several motors, each not exceeding 1 hp in rating, shall be permitted on a nominal 120-volt branch circuit protected at not over 20 amperes or a branch circuit of 1000 volts, nominal, or less, protected at not over 15 amperes, if all of the following conditions are met: The full-load rating of each motor does not exceed 6 amperes.The rating of the branch-circuit short-circuit and ground-fault protective device marked on any of the motor controllers is not exceeded.Individual overload protection conforms to 430.32. [430.53_(A)](https://2023.antflix.net#430.53_(A))", + "displayTitle": "(A) Not Over 1 Horsepower", + "children": [], + "url": "https://2023.antflix.net#430.53_(A)" + }, + { + "body": "Two or more motors or one or more motors and other loads shall be permitted to be connected to a branch circuit where all of the following conditions are met: The branch-circuit short-circuit and ground-fault protective device is selected not to exceed that allowed by 430.52 for the smallest rated motor supplied by the branch circuit.Each motor is provided with separate overload protection.It can be determined that the branch-circuit short-circuit and ground-fault protective device will not open under the most severe normal conditions of service that might be encountered. [430.53_(B)](https://2023.antflix.net#430.53_(B))", + "displayTitle": "(B) If Smallest Rated Motor Protected", + "children": [], + "url": "https://2023.antflix.net#430.53_(B)" + }, + { + "body": "Two or more motors of any size or one or more motors and other loads, with each motor having individual overload protection, shall be permitted to be connected to a branch circuit where the motor controller(s) and overload device(s) comply with 430.53(C)(1) through (C)(5). [430.53_(C)](https://2023.antflix.net#430.53_(C))", + "displayTitle": "(C) Other Group Installations", + "children": [ + { + "body": "The assembly type shall meet one of the following conditions: A listed factory assembly, with the motor branch-circuit short-circuit and ground-fault protective device either provided as part of the assembly or specified by a marking on the assemblyField installation of the motor branch-circuit short-circuit and ground-fault protective device, motor controller(s), and overload device(s) as separate assemblies listed for such use and provided with manufacturers' instructions for use with each other [430.53_(C)_(1)](https://2023.antflix.net#430.53_(C)_(1))", + "displayTitle": "(1) Types of Assemblies", + "children": [], + "url": "https://2023.antflix.net#430.53_(C)_(1)" + }, + { + "body": "Each motor overload device shall meet one of the following conditions: Listed for group installation with a specified maximum rating of fuse, inverse time circuit breaker, or bothSelected such that the ampere rating of the motor-branch short-circuit and ground-fault protective device does not exceed that permitted by 430.52 for that individual motor overload device and corresponding motor load [430.53_(C)_(2)](https://2023.antflix.net#430.53_(C)_(2))", + "displayTitle": "(2) Motor Overload Devices", + "children": [], + "url": "https://2023.antflix.net#430.53_(C)_(2)" + }, + { + "body": "Each motor controller shall meet one of the following conditions: Listed for group installation with a specified maximum rating of fuse, circuit breaker, or bothSelected such that the ampere rating of the motor-branch short-circuit and ground-fault protective device does not exceed that permitted by 430.52 for that individual motor controller and corresponding motor load [430.53_(C)_(3)](https://2023.antflix.net#430.53_(C)_(3))", + "displayTitle": "(3) Motor Controllers", + "children": [], + "url": "https://2023.antflix.net#430.53_(C)_(3)" + }, + { + "body": "The branch circuit shall be protected by fuses or listed inverse time circuit breakers having a rating not exceeding the sum of all of the following: The value specified in 430.52 for the highest rated motor connected to the branch circuitThe sum of the full-load current ratings of all other motorsThe sum of the current ratings of other loads connected to the circuitWhere this calculation results in a rating less than the ampacity of the branch-circuit conductors, it shall be permitted to increase the maximum rating of the fuses or circuit breaker to a value not exceeding that permitted by 240.4(B). Additionally, this rating shall not be larger than allowed by 430.40 for the overload relay protecting the smallest rated motor of the group. [430.53_(C)_(4)](https://2023.antflix.net#430.53_(C)_(4))", + "displayTitle": "(4) Short-Circuit & Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#430.53_(C)_(4)" + }, + { + "body": "Loads other than motor loads shall be protected in accordance with Part I through Part VII of Article 240. Informational Note: See 110.10 for circuit impedance and other characteristics. [430.53_(C)_(5)](https://2023.antflix.net#430.53_(C)_(5))", + "displayTitle": "(5) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#430.53_(C)_(5)" + } + ], + "url": "https://2023.antflix.net#430.53_(C)" + }, + { + "body": "For group installations described in 430.53(A), (B), or (C), the conductors of any tap supplying a single motor shall not be required to have an individual branch-circuit short-circuit and ground-fault protective device if they comply with 430.53(D)(1) or (D)(2). [430.53_(D)](https://2023.antflix.net#430.53_(D))", + "displayTitle": "(D) Single Motor Taps", + "children": [ + { + "body": "Conductors to the motor shall have an ampacity that is not less than the ampacity of the branch-circuit conductors unless all of the following conditions are met: The conductors from the point of the tap to the motor overload device shall not be longer than 7.5 m (25 ft).The conductor ampacity is not less than one-third the ampacity of the branch-circuit conductors. The minimum ampacity shall not be less than required in 430.22.The conductors from the point of the tap to the motor controller(s) shall be protected from physical damage by being enclosed in an approved raceway or other approved means. [430.53_(D)_(1)](https://2023.antflix.net#430.53_(D)_(1))", + "displayTitle": "(1) Conductors to the Motor", + "children": [], + "url": "https://2023.antflix.net#430.53_(D)_(1)" + }, + { + "body": "Conductors from the point of the tap from the branch circuit to a listed manual motor controller additionally marked \"Suitable for Tap Conductor Protection in Group Installations,\" or to a branch-circuit protective device, shall meet one of the following conditions: The length of the motor tap conductors does not exceed 3 m (10 ft) and the tap conductors comply with all of the following:The ampacity of the tap conductors is not less than one-tenth of the rating or setting of the branch-circuit short-circuit ground-fault protective device.The conductors from the motor controller to the motor shall have an ampacity in accordance with 430.22.The conductors from the point of the tap to the motor controller(s) shall be suitably protected from physical damage and enclosed either by an enclosed motor controller or by a raceway. Exception to (1): Physical protection of the conductors from the point of the lap to the motor controllers shall not be required if the conductors have an ampacity not less than that of the branch-circuit conductors.The length of the motor tap conductors does not exceed 7.5 m (25 ft) and the tap conductors comply with all of the following:The ampacity of the tap conductors is not less than one-third of the branch-circuit conductor ampacity.The conductors from the motor controller to the motor shall have an ampacity in accordance with 430.22.The conductors from the point of the tap to the motor controller(s) shall be suitably protected from physical damage and enclosed either by an enclosed motor controller or by a raceway.Exception to (2): Physical protection of the conductors from the point of the tap to the motor controllers shall not be required if the conductors have an ampacity not less than that of the branch-circuit conductors. [430.53_(D)_(2)](https://2023.antflix.net#430.53_(D)_(2))", + "displayTitle": "(2) Tap Conductors Between the Branch Circuit and Listed Manual Motor Controllers", + "children": [], + "url": "https://2023.antflix.net#430.53_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#430.53_(D)" + } + ], + "url": "https://2023.antflix.net#430.53" + }, + { + "body": "The rating of the branch-circuit short-circuit and ground-fault protective device for multimotor and combination-load equipment shall not exceed the rating marked on the equipment in accordance with 430.7(D). [430.54](https://2023.antflix.net#430.54)", + "displayTitle": "430.54 Multimotor and Combination-Load Equipment", + "children": [], + "url": "https://2023.antflix.net#430.54" + }, + { + "body": "Motor branch-circuit short-circuit and ground-fault protection and motor overload protection shall be permitted to be combined in a single protective device where the rating or setting of the device provides the overload protection specified in 430.32. [430.55](https://2023.antflix.net#430.55)", + "displayTitle": "430.55 Combined Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#430.55" + }, + { + "body": "Branch-circuit protective devices shall comply with 240.15. [430.56](https://2023.antflix.net#430.56)", + "displayTitle": "430.56 Branch-Circuit Protective Devices - In Which Conductor", + "children": [], + "url": "https://2023.antflix.net#430.56" + }, + { + "body": "Where fuses are used for motor branch-circuit short-circuit and ground-fault protection, the fuseholders shall not be of a smaller size than required to accommodate the fuses specified by Table 430.52(C)(1). Exception: Where fuses having time delay appropriate for the starting characteristics of the motor are used, it shall be permitted to use fuse-holders sized to fit the fuses that are used. [430.57](https://2023.antflix.net#430.57)", + "displayTitle": "430.57 Size of Fuseholder", + "children": [], + "url": "https://2023.antflix.net#430.57" + }, + { + "body": "A circuit breaker for motor branch-circuit short-circuit and ground-fault protection shall have a current rating in accordance with 430.52 and 430.110. [430.58](https://2023.antflix.net#430.58)", + "displayTitle": "430.58 Rating of Circuit Breaker", + "children": [], + "url": "https://2023.antflix.net#430.58" + }, + { + "displayTitle": "Part V Motor Feeder Short-Circuit and Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#divider_12_V" + }, + { + "body": "Part V specifies protective devices intended to protect feeder conductors supplying motors against overcurrents due to short circuits or ground-faults. Informational Note: See Informative Annex D, Example D8, for an example of motor feeder circuit short-circuit and ground-fault protection rating and setting. [430.61](https://2023.antflix.net#430.61)", + "displayTitle": "430.61 General", + "children": [], + "url": "https://2023.antflix.net#430.61" + }, + { + "displayTitle": "430.62 Rating or Setting \u2014 Motor Load", + "children": [ + { + "body": "A feeder supplying a specific fixed motor load(s) and consisting of conductor sizes in accordance with 430.24 shall be provided with a protective device having a rating or setting not greater than the largest rating or setting of the branch-circuit short-circuit and ground-fault protective device for any motor supplied by the feeder [based on the maximum permitted value for the specific type of protective device in accordance with 430.52, or 440.22(A) for hermetic refrigerant motor-compressors], plus the sum of the full-load currents of the other motors of the group. Where the same rating or setting of the branch-circuit short-circuit and ground-fault protective device is used on two or more of the branch circuits supplied by the feeder, one of the protective devices shall be considered the largest for the above calculations. Exception No. 1: Where one or more instantaneous-trip circuit breakers or motor short-circuit protectors are used for motor branch-circuit short-circuit and ground-fault protection as permitted in 430.52(C), the maximum rating of each instantaneous-trip circuit breaker or motor short-circuit protector shall be assumed to have a rating not exceeding the maximum percentage of motor full-load current permitted by Table 430.52(C)(1) for the type of feeder protective device employed. Exception No. 2: Where the feeder overcurrent protective device also provides overcurrent protection for a motor control center, the provisions of 430.94 shall apply. Informational Note: See Informative Annex D, Example D8, for an example of motor feeder circuit short-circuit and ground-fault protection rating and setting. [430.62_(A)](https://2023.antflix.net#430.62_(A))", + "displayTitle": "(A) Specific Load", + "children": [], + "url": "https://2023.antflix.net#430.62_(A)" + }, + { + "body": "Where feeder conductors have an ampacity greater than required by 430.24, the rating or setting of the feeder overcurrent protective device shall be permitted to be based on the ampacity of the feeder conductors. [430.62_(B)](https://2023.antflix.net#430.62_(B))", + "displayTitle": "(B) Other Installations", + "children": [], + "url": "https://2023.antflix.net#430.62_(B)" + } + ], + "url": "https://2023.antflix.net#430.62" + }, + { + "body": "Where a feeder supplies a motor load and other load(s), the feeder protective device shall have a rating not less than that required for the sum of the other load(s) plus the following: For a single motor, the rating permitted by 430.52For a single hermetic refrigerant motor-compressor, the rating permitted by 440.22For two or more motors, the rating permitted by 430.62Exception: Where the feeder overcurrent device provides the overcurrent protection for a motor control center, the provisions of 430.94 shall apply. [430.63](https://2023.antflix.net#430.63)", + "displayTitle": "430.63 Rating or Setting - Motor Load and Other Load(s)", + "children": [], + "url": "https://2023.antflix.net#430.63" + }, + { + "displayTitle": "Part VI Motor Control Circuits", + "children": [], + "url": "https://2023.antflix.net#divider_9_VI" + }, + { + "body": "Part VI contains modifications of the general requirements and applies to the particular conditions of motor control circuits. [430.71](https://2023.antflix.net#430.71)", + "displayTitle": "430.71 General", + "children": [], + "url": "https://2023.antflix.net#430.71" + }, + { + "displayTitle": "430.72 Overcurrent Protection", + "children": [ + { + "body": "A motor control circuit tapped from the load side of a motor branch-circuit short-circuit and ground-fault protective device(s) and functioning to control the motor(s) connected to that branch circuit shall be protected against overcurrent in accordance with 430.72. Such a tapped control circuit shall not be considered to be a branch circuit and shall be permitted to be protected by either a supplementary or branch-circuit overcurrent protective device(s). A motor control circuit other than such a tapped control circuit shall be protected against overcurrent in accordance with 724.43 or the notes to Table 11 (A) and Table 11 (B) in Chapter 9, as applicable. [430.72_(A)](https://2023.antflix.net#430.72_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#430.72_(A)" + }, + { + "body": "The overcurrent protection for conductors shall be provided as specified in 430.72(B)(1) or (B)(2).\nException No. 1: Where the opening of the control circuit would create a hazard as, for example, the control circuit of a fire pump motor, and the like, conductors of control circuits shall require only short-circuit and ground-fault protection and shall be permitted to be protected by the motor branch-circuit short-circuit and ground-fault protective device(s).\nException No. 2: Conductors supplied by the secondary side of a single-phase transformer having only a two-wire (single-voltage) secondary shall be permitted to be protected by overcurrent protection provided on the primary (supply) side of the transformer, provided this protection does not exceed the value determined by multiplying the appropriate maximum rating of the overcurrent device for the secondary conductor from Table 430.72(B)(2) by the secondary-to-primary voltage ratio. Transformer secondary conductors (other than two-wire) shall not be considered to be protected by the primary overcurrent protection. [430.72_(B)](https://2023.antflix.net#430.72_(B))", + "displayTitle": "(B) Conductor Protection", + "children": [ + { + "body": "Where the motor branch-circuit short-circuit and ground-fault protective device does not provide protection in accordance with 430.72(B)(2), separate overcurrent protection shall be provided. The over-current protection shall not exceed the values specified in Column A of Table 430.72(B)(2). [430.72_(B)_(1)](https://2023.antflix.net#430.72_(B)_(1))", + "displayTitle": "(1) Separate Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#430.72_(B)_(1)" + }, + { + "body": "Conductors shall be permitted to be protected by the motor branch-circuit short-circuit and ground-fault protective device and shall require only short-circuit and ground-fault protection. Where the conductors do not extend beyond the motor control equipment enclosure, the rating of the protective device(s) shall not exceed the value specified in Column B of Table 430.72(B)(2). Where the conductors extend beyond the motor control equipment enclosure, the rating of the protective device(s) shall not exceed the value specified in Column C of Table 430.72(B)(2).Table 430.72(B)(2) Maximum Rating of Overcurrent Protective Device in Amperes\n\n\n\nControl Circuit Conductor Size (AWG)\nColumn ASeparate Protection Provided\nProtection Provided by Motor Branch-Circuit Protective Device(s)\n\n\nColumn BConductors Within Enclosure\nColumn CConductors Extend Beyond Enclosure\n\n\nCopper\nAluminum or Copper-Clad Aluminum\nCopper\nAluminum or Copper-Clad Aluminum\nCopper\nAluminum or Copper-Clad Aluminum\n\n\n\n\n18\n7\n-\n25\n-\n7\n-\n\n\n16\n10\n-\n40\n-\n10\n-\n\n\n14\n(Note 1)\n-\n100\n-\n45\n-\n\n\n12\n(Note 1)\n(Note 1)\n120\n100\n60\n45\n\n\n10\n(Note 1)\n(Note 1)\n160\n140\n90\n75\n\n\nLarger than 10\n(Note 1)\n(Note 1)\n(Note 2)\n(Note 2)\n(Note 3)\n(Note 3)\n\n\n\nNotes:\n\nValue specified in 310.15 as applicable.\n400 percent of value specified in Table 310.17 for 60\u00b0C conductors.\n300 percent of value specified in Table 310.16 for 60\u00b0C conductors.\n [430.72_(B)_(2)](https://2023.antflix.net#430.72_(B)_(2))", + "displayTitle": "(2) Branch-Circuit Overcurrent Protective Device", + "children": [], + "url": "https://2023.antflix.net#430.72_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#430.72_(B)" + }, + { + "body": "Where a motor control circuit transformer is provided, the transformer shall be protected in accordance with 430.72(C)(1), (C)(2), (C)(3), (C)(4), or (C)(5). Exception: Overcurrent protection shall be omitted where the opening of the control circuit would create a hazard as, for example, the control circuit of a fire pump motor and the like. [430.72_(C)](https://2023.antflix.net#430.72_(C))", + "displayTitle": "(C) Control Circuit Transformer", + "children": [ + { + "body": "Where the transformer supplies a Class 1 power-limited circuit, the circuit shall comply with 724.30 through 724.52. Where the transformer supplies a Class 2 or Class 3 remote-control circuit, the circuit shall comply with the requirements of Part II of Article 725. [430.72_(C)_(1)](https://2023.antflix.net#430.72_(C)_(1))", + "displayTitle": "(1) Class 1 Power-Limited, Class 2, or Class 3 Circuits", + "children": [], + "url": "https://2023.antflix.net#430.72_(C)_(1)" + }, + { + "body": "Protection shall be permitted to be provided in accordance with 450.3. [430.72_(C)_(2)](https://2023.antflix.net#430.72_(C)_(2))", + "displayTitle": "(2) Transformers", + "children": [], + "url": "https://2023.antflix.net#430.72_(C)_(2)" + }, + { + "body": "Control circuit transformers rated less than 50 volt-amperes (VA) and that are an integral part of the motor controller and located within the motor controller enclosure shall be permitted to be protected by primary overcurrent devices, impedance limiting means, or other inherent protective means. [430.72_(C)_(3)](https://2023.antflix.net#430.72_(C)_(3))", + "displayTitle": "(3) Less Than 50 Volt-Amperes", + "children": [], + "url": "https://2023.antflix.net#430.72_(C)_(3)" + }, + { + "body": "Where the control circuit transformer rated primary current is less than 2 amperes, an overcurrent device rated or set at not more than 500 percent of the rated primary current shall be permitted in the primary circuit. [430.72_(C)_(4)](https://2023.antflix.net#430.72_(C)_(4))", + "displayTitle": "(4) Primary Less Than 2 Amperes", + "children": [], + "url": "https://2023.antflix.net#430.72_(C)_(4)" + }, + { + "body": "Protection shall be permitted to be provided by other approved means. [430.72_(C)_(5)](https://2023.antflix.net#430.72_(C)_(5))", + "displayTitle": "(5) Other Means", + "children": [], + "url": "https://2023.antflix.net#430.72_(C)_(5)" + } + ], + "url": "https://2023.antflix.net#430.72_(C)" + } + ], + "url": "https://2023.antflix.net#430.72" + }, + { + "body": "Where damage to a motor control circuit would constitute a hazard, all conductors of such a remote motor control circuit that are outside the control device itself shall be installed in a raceway or be otherwise protected from physical damage. [430.73](https://2023.antflix.net#430.73)", + "displayTitle": "430.73 Protection of Conductors From Physical Damage", + "children": [], + "url": "https://2023.antflix.net#430.73" + }, + { + "body": "Where one conductor of the motor control circuit is grounded, the motor control circuit shall be arranged so that a ground fault in the control circuit remote from the motor controller will (1) not start the motor and (2) not bypass manually operated shutdown devices or automatic safety shutdown devices. [430.74](https://2023.antflix.net#430.74)", + "displayTitle": "430.74 Electrical Arrangement of Control Circuits", + "children": [], + "url": "https://2023.antflix.net#430.74" + }, + { + "displayTitle": "430.75 Disconnection", + "children": [ + { + "body": "Motor control circuits shall be arranged so that they will be disconnected from all sources of supply when the disconnecting means is in the open position. The disconnecting means shall be permitted to consist of two or more separate devices, one of which disconnects the motor and the motor controller from the source(s) of power supply for the motor, and the other(s), the motor control circuit(s) from its power supply. Where separate devices are used, they shall be located immediately adjacent to each other.Exception No. 1: Where more than 12 motor control circuit conductors are required to be disconnected, the disconnecting means shall be permitted to be located other than immediately adjacent to each other where all of the following conditions are met:\n\nAccess to energized parts is limited to qualified persons in accordance with Part XII of this article.\nA warning sign is permanently located on the outside of each equipment enclosure door or cover permitting access to the live parts in the motor control circuit(s), warning that motor control circuit disconnecting means are remotely located and specifying the location and identification of each disconnect. Where energized parts are not in an equipment enclosure as permitted by 430.232 and 430.233, an additional warning sign(s) shall be located where visible to persons who may be working in the area of the energized parts.\n\nException No. 2: The motor control circuit disconnecting means shall be permitted to be remote from the motor controller power supply disconnecting means where the opening of one or more motor control circuit disconnecting means is capable of resulting in potentially unsafe conditions for personnel or property and the conditions of items (1) and (2) of Exception No. 1 are met. [430.75_(A)](https://2023.antflix.net#430.75_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#430.75_(A)" + }, + { + "body": "Where a transformer or other device is used to obtain a reduced voltage for the motor control circuit and is located in the motor controller enclosure, such transformer or other device shall be connected to the load side of the disconnecting means for the motor control circuit. [430.75_(B)](https://2023.antflix.net#430.75_(B))", + "displayTitle": "(B) Control Transformer in Motor Controller Enclosure", + "children": [], + "url": "https://2023.antflix.net#430.75_(B)" + } + ], + "url": "https://2023.antflix.net#430.75" + }, + { + "displayTitle": "Part VII Motor Controllers", + "children": [], + "url": "https://2023.antflix.net#divider_8_VII" + }, + { + "body": "Part VII is intended to require suitable motor controllers for all motors. [430.81](https://2023.antflix.net#430.81)", + "displayTitle": "430.81 General", + "children": [ + { + "body": "For a stationary motor rated at 1/8 hp or less that is normally left running and is constructed so that it cannot be damaged by overload or failure to start, such as clock motors and the like, the branch-circuit disconnecting means shall be permitted to serve as the motor controller. [430.81_(A)](https://2023.antflix.net#430.81_(A))", + "displayTitle": "(A) Stationary Motor of 1/8 Horsepower or Less", + "children": [], + "url": "https://2023.antflix.net#430.81_(A)" + }, + { + "body": "For a portable motor rated at 1/3 hp or less, the motor controller shall be permitted to be an attachment plug and receptacle or cord connector. [430.81_(B)](https://2023.antflix.net#430.81_(B))", + "displayTitle": "(B) Portable Motor of 1/3 Horsepower or Less", + "children": [], + "url": "https://2023.antflix.net#430.81_(B)" + } + ], + "url": "https://2023.antflix.net#430.81" + }, + { + "displayTitle": "430.82 Motor Controller Design", + "children": [ + { + "body": "Each motor controller shall be capable of starting and stopping the motor it controls and shall be capable of interrupting the locked-rotor current of the motor. [430.82_(A)](https://2023.antflix.net#430.82_(A))", + "displayTitle": "(A) Starting and Stopping", + "children": [], + "url": "https://2023.antflix.net#430.82_(A)" + }, + { + "body": "An autotransformer starter shall provide an \"off\" position, a running position, and at least one starting position. It shall be designed so that it cannot rest in the starting position or in any position that will render the overload device in the circuit inoperative. [430.82_(B)](https://2023.antflix.net#430.82_(B))", + "displayTitle": "(B) Autotransformer", + "children": [], + "url": "https://2023.antflix.net#430.82_(B)" + }, + { + "body": "Rheostats shall be in compliance with the following: Motor-starting rheostats shall be designed so that the contact arm cannot be left on intermediate segments. The point or plate on which the arm rests when in the starting position shall have no electrical connection with the resistor.Motor-starting rheostats for dc motors operated from a constant voltage supply shall be equipped with automatic devices that will interrupt the supply before the speed of the motor has fallen to less than one-third its normal rate. [430.82_(C)](https://2023.antflix.net#430.82_(C))", + "displayTitle": "(C) Rheostats", + "children": [], + "url": "https://2023.antflix.net#430.82_(C)" + } + ], + "url": "https://2023.antflix.net#430.82" + }, + { + "body": "The motor controller shall have a rating in accordance with 430.83(A), unless otherwise permitted in 430.83(B) or (C), or in accordance with (D), under the conditions specified. [430.83](https://2023.antflix.net#430.83)", + "displayTitle": "430.83 Ratings", + "children": [ + { + "displayTitle": "(A) General", + "children": [ + { + "body": "Motor controllers, other than inverse time circuit breakers and molded case switches, shall have horsepower ratings at the application voltage not lower than the horsepower rating of the motor. [430.83_(A)_(1)](https://2023.antflix.net#430.83_(A)_(1))", + "displayTitle": "(1) Horsepower Ratings", + "children": [], + "url": "https://2023.antflix.net#430.83_(A)_(1)" + }, + { + "body": "A branch-circuit inverse time circuit breaker rated in amperes shall be permitted as a motor controller for all motors. Where this circuit breaker is also used for overload protection, it shall conform to the appropriate provisions of this article governing overload protection. [430.83_(A)_(2)](https://2023.antflix.net#430.83_(A)_(2))", + "displayTitle": "(2) Circuit Breaker", + "children": [], + "url": "https://2023.antflix.net#430.83_(A)_(2)" + }, + { + "body": "A molded case switch rated in amperes shall be permitted as a motor controller for all motors. [430.83_(A)_(3)](https://2023.antflix.net#430.83_(A)_(3))", + "displayTitle": "(3) Molded Case Switch", + "children": [], + "url": "https://2023.antflix.net#430.83_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#430.83_(A)" + }, + { + "body": "Devices in accordance with 430.81(A) and (B) shall be permitted as a motor controller. [430.83_(B)](https://2023.antflix.net#430.83_(B))", + "displayTitle": "(B) Small Motors", + "children": [], + "url": "https://2023.antflix.net#430.83_(B)" + }, + { + "body": "For stationary motors rated at 2 hp or less and 300 volts or less, the motor controller shall be permitted to be either of the following: A general-use switch having an ampere rating not less than twice the full-load current rating of the motorOn ac circuits, a general-use snap switch suitable only for use on ac (not general-use ac\u2014dc snap switches) where the motor full-load current rating is not more than 80 percent of the ampere rating of the switch [430.83_(C)](https://2023.antflix.net#430.83_(C))", + "displayTitle": "(C) Stationary Motors of 2 Horsepower or Less", + "children": [], + "url": "https://2023.antflix.net#430.83_(C)" + }, + { + "body": "For torque motors, the motor controller shall have a continuous-duty, full-load current rating not less than the nameplate current rating of the motor. For a motor controller rated in horsepower but not marked with the foregoing current rating, the equivalent current rating shall be determined from the horsepower rating by using Table 430.247, Table 430.248, Table 430.249, or Table 430.250. [430.83_(D)](https://2023.antflix.net#430.83_(D))", + "displayTitle": "(D) Torque Motors", + "children": [], + "url": "https://2023.antflix.net#430.83_(D)" + }, + { + "body": "A motor controller with a straight voltage rating, for example, 240 volts or 480 volts, shall be permitted to be applied in a circuit in which the nominal voltage between any two conductors does not exceed the motor controller's voltage rating. A motor controller with a slash rating, for example, 120/240 volts or 480Y/277 volts, shall only be applied in a solidly grounded circuit in which the nominal voltage to ground from any conductor does not exceed the lower of the two values of the motor controller's voltage rating and the nominal voltage between any two conductors does not exceed the higher value of the motor controller's voltage rating. [430.83_(E)](https://2023.antflix.net#430.83_(E))", + "displayTitle": "(E) Voltage Rating", + "children": [], + "url": "https://2023.antflix.net#430.83_(E)" + }, + { + "body": "A motor controller shall not be installed where the available fault current exceeds the motor controller's short-circuit current rating. Informational Note: The short-circuit current rating might be marked on the device or might be a rating for a tested combination specified in the motor controller's technical manual or instruction sheet. [430.83_(F)](https://2023.antflix.net#430.83_(F))", + "displayTitle": "(F) Short-Circuit Current Rating", + "children": [], + "url": "https://2023.antflix.net#430.83_(F)" + } + ], + "url": "https://2023.antflix.net#430.83" + }, + { + "body": "The motor controller shall not be required to open all conductors to the motor. Exception: Where the motor controller serves also as a disconnecting means, it shall open all ungrounded conductors to the motor in accordance with 430.111. [430.84](https://2023.antflix.net#430.84)", + "displayTitle": "430.84 Need Not Open All Conductors", + "children": [], + "url": "https://2023.antflix.net#430.84" + }, + { + "body": "One pole of the motor controller shall be permitted to be placed in a permanently grounded conductor if the motor controller is designed so that the pole in the grounded conductor cannot be opened without simultaneously opening all conductors of the circuit. [430.85](https://2023.antflix.net#430.85)", + "displayTitle": "430.85 In Grounded Conductors", + "children": [], + "url": "https://2023.antflix.net#430.85" + }, + { + "body": "Each motor shall be provided with an individual motor controller. Exception No. 1: For motors rated 1000 volts or less, a single motor controller rated at not less than the equivalent horsepower, as determined in accordance with 430.110(C)(1), of all the motors in the group shall be permitted to serve the group under any of the following conditions: (1) Where a number of motors drive several parts of a single machine, or piece of apparatus, such as metal and woodworking machines, cranes, hoists, and similar apparatus (2) Where a group of motors is under the protection of one overcurrent device in accordance with 430.53(A) (3) Where a group of motors is located in a single room within sight from the motor controller location Exception No. 2: A branch-circuit disconnecting means serving as the motor controller in accordance with 430.81(A) shall be permitted to serve more than one motor. [430.87](https://2023.antflix.net#430.87)", + "displayTitle": "430.87 Number of Motors Served by Each Motor Controller", + "children": [], + "url": "https://2023.antflix.net#430.87" + }, + { + "body": "Adjustable-speed motors that are controlled by means of field regulation shall be equipped and connected so that they cannot be started under a weakened field. Exception: Starting under a weakened field shall be permitted where the motor is designed for such starting. [430.88](https://2023.antflix.net#430.88)", + "displayTitle": "430.88 Adjustable-Speed Motors", + "children": [], + "url": "https://2023.antflix.net#430.88" + }, + { + "body": "Machines of the following types shall be provided with speed-limiting devices or other speed-limiting means: Separately excited dc motorsSeries motorsMotor-generators and converters that can be driven at excessive speed from the dc end, as by a reversal of current or decrease in loadException: Separate speed-limiting devices or means shall not be required under either of the following conditions:Where the inherent characteristics of the machines, the system, or the load and the mechanical connection thereto are such as to safely limit the speedWhere the machine is always under the manual control of a qualified operator [430.89](https://2023.antflix.net#430.89)", + "displayTitle": "430.89 Speed Limitation", + "children": [], + "url": "https://2023.antflix.net#430.89" + }, + { + "body": "The rating of a combination fuseholder and switch used as a motor controller shall be such that the fuseholder will accommodate the size of the fuse specified in Part III of this article for motor overload protection. Exception: Where fuses having time delay appropriate for the starting characteristics of the motor are used, fuseholders of smaller size than specified in Part III of this article shall be permitted. [430.90](https://2023.antflix.net#430.90)", + "displayTitle": "430.90 Combination Fuseholder and Switch as Motor Controller", + "children": [], + "url": "https://2023.antflix.net#430.90" + }, + { + "displayTitle": "Part VIII Motor Control Centers", + "children": [], + "url": "https://2023.antflix.net#divider_3_VIII" + }, + { + "body": "Part VIII covers motor control centers installed for the control of motors, lighting, and power circuits. [430.92](https://2023.antflix.net#430.92)", + "displayTitle": "430.92 General", + "children": [], + "url": "https://2023.antflix.net#430.92" + }, + { + "body": "Motor control centers shall be provided with overcurrent protection in accordance with Parts I, II, and VIII of Article 240. The ampere rating or setting of the overcurrent protective device shall not exceed the rating of the common power bus. This protection shall be provided by (1) an overcurrent protective device located ahead of the motor control center or (2) a main overcurrent protective device located within the motor control center. [430.94](https://2023.antflix.net#430.94)", + "displayTitle": "430.94 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#430.94" + }, + { + "body": "Where used as service equipment, each motor control center shall be provided with a single main disconnecting means to disconnect all ungrounded service conductors. Exception No. 1: A second service disconnect shall be permitted to supply additional equipment. Where a grounded conductor is provided, the motor control center shall be provided with a main bonding jumper, sized in accordance with 250.28(D), within one of the sections for connecting the grounded conductor, on its supply side, to the motor control center equipment ground bus. Exception No. 2: High-impedance grounded neutral systems shall be permitted to be connected as provided in 250.36. [430.95](https://2023.antflix.net#430.95)", + "displayTitle": "430.95 Service Equipment", + "children": [], + "url": "https://2023.antflix.net#430.95" + }, + { + "body": "Multisection motor control centers shall be connected together with an equipment grounding conductor or an equivalent equipment grounding bus sized in accordance with Table 250.122. Equipment grounding conductors shall be connected to this equipment grounding bus or to a grounding termination point provided in a single-section motor control center. [430.96](https://2023.antflix.net#430.96)", + "displayTitle": "430.96 Grounding", + "children": [], + "url": "https://2023.antflix.net#430.96" + }, + { + "displayTitle": "430.97 Busbars and Conductors", + "children": [ + { + "body": "Busbars shall be protected from physical damage and be held firmly in place. Other than for required interconnections and control wiring, only those conductors that are intended for termination in a vertical section shall be located in that section. Exception: Conductors shall be permitted to travel horizontally through vertical sections where such conductors are isolated from the busbars by a barrier. [430.97_(A)](https://2023.antflix.net#430.97_(A))", + "displayTitle": "(A) Support and Arrangement", + "children": [], + "url": "https://2023.antflix.net#430.97_(A)" + }, + { + "body": "The phase arrangement on 3-phase horizontal common power and vertical buses shall be A, B, C from front to back, top to bottom, or left to right, as viewed from the front of the motor control center. The B phase shall be that phase having the higher voltage to ground on 3-phase, 4-wire, delta-connected systems. Other busbar arrangements shall be permitted for additions to existing installations and shall be marked. Exception: Rear-mounted units connected to a vertical bus that is common to front-mounted units shall be permitted to have a C, B, A phase arrangement where properly identified. [430.97_(B)](https://2023.antflix.net#430.97_(B))", + "displayTitle": "(B) Phase Arrangement", + "children": [], + "url": "https://2023.antflix.net#430.97_(B)" + }, + { + "body": "The minimum wire-bending space at the motor control center terminals and minimum gutter space shall be in accordance with 312.6. [430.97_(C)](https://2023.antflix.net#430.97_(C))", + "displayTitle": "(C) Minimum Wire-Bending Space", + "children": [], + "url": "https://2023.antflix.net#430.97_(C)" + }, + { + "body": "Spacings between motor control center bus terminals and other bare metal parts shall not be less than specified in Table 430.97(D).\nTable 430.97(D) Minimum Spacing Between Bare Metal Parts\n\n\n\nNominal Voltage\nOpposite Polarity Where Mounted on the Same Surface\nOpposite Polarity Where Held Free in Air\nLive Parts to Ground\n\n\nmm\nin.\nmm\nin.\nmm\nin.\n\n\n\n\nNot over 125 volts, nominal\n19.1\n3/4\n12.7\n1/2\n12.7\n1/2\n\n\nNot over 250 volts, nominal\n31.8\n11/4\n19.1\n3/4\n12.7\n1/2\n\n\nNot over 600 volts, nominal\n50.8\n2\n25.4\n1\n25.4\n1\n\n\n [430.97_(D)](https://2023.antflix.net#430.97_(D))", + "displayTitle": "(D) Spacings", + "children": [], + "url": "https://2023.antflix.net#430.97_(D)" + }, + { + "body": "Barriers shall be placed in all service-entrance motor control centers to isolate service busbars and terminals from the remainder of the motor control center. [430.97_(E)](https://2023.antflix.net#430.97_(E))", + "displayTitle": "(E) Barriers", + "children": [], + "url": "https://2023.antflix.net#430.97_(E)" + } + ], + "url": "https://2023.antflix.net#430.97" + }, + { + "displayTitle": "430.98 Marking", + "children": [ + { + "body": "Motor control centers shall be marked according to 110.21, and the marking shall be plainly visible after installation. Marking shall also include common power bus current rating and motor control center short-circuit current rating. [430.98_(A)](https://2023.antflix.net#430.98_(A))", + "displayTitle": "(A) Motor Control Centers", + "children": [], + "url": "https://2023.antflix.net#430.98_(A)" + }, + { + "body": "Motor control units in a motor control center shall comply with 430.8. [430.98_(B)](https://2023.antflix.net#430.98_(B))", + "displayTitle": "(B) Motor Control Units", + "children": [], + "url": "https://2023.antflix.net#430.98_(B)" + } + ], + "url": "https://2023.antflix.net#430.98" + }, + { + "body": "The available fault current at the motor control center and the date the available fault current calculation was performed shall be documented and made available to those authorized to inspect, install, or maintain the installation. [430.99](https://2023.antflix.net#430.99)", + "displayTitle": "430.99 Available Fault Current", + "children": [], + "url": "https://2023.antflix.net#430.99" + }, + { + "displayTitle": "Part IX Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#divider_1_IX" + }, + { + "body": "Part IX is intended to require disconnecting means capable of disconnecting motors and motor controllers from the circuit. [430.101](https://2023.antflix.net#430.101)", + "displayTitle": "430.101 General", + "children": [], + "url": "https://2023.antflix.net#430.101" + }, + { + "displayTitle": "430.102 Location", + "children": [ + { + "body": "An individual disconnecting means shall be provided for each motor controller and shall disconnect the motor controller. The disconnecting means shall be located in sight from the motor controller location. Exception No. 1: For motor circuits over 1000 volts, nominal, a motor controller disconnecting means lockable in accordance with 110.25 shall be permitted to be out of sight of the motor controller if the motor controller is marked with a label giving the location of the disconnecting means. Exception No. 2: A single disconnecting means shall be permitted for a group of coordinated motor controllers that drive several parts of a single machine or piece of apparatus. The disconnecting means shall be located in sight from the motor controllers, and both the disconnecting means and the motor controllers shall be located in sight from the machine or apparatus. Exception No. 3: The disconnecting means shall not be required to be in sight from valve actuator motor (VAM) assemblies containing the motor controller where such a location introduces additional or increased hazards to persons or property and the following conditions are met: (1) The valve actuator motor assembly is marked with a label giving the location of the disconnecting means. (2) The disconnecting means is lockable in accordance with 110.25. [430.102_(A)](https://2023.antflix.net#430.102_(A))", + "displayTitle": "(A) Motor Controller", + "children": [], + "url": "https://2023.antflix.net#430.102_(A)" + }, + { + "body": "A disconnecting means shall be provided for a motor in accordance with 430.102(B)(1) or (B)(2). [430.102_(B)](https://2023.antflix.net#430.102_(B))", + "displayTitle": "(B) Motor", + "children": [ + { + "body": "A disconnecting means for the motor shall be located in sight from the motor location and the driven machinery location. [430.102_(B)_(1)](https://2023.antflix.net#430.102_(B)_(1))", + "displayTitle": "(1) Separate Motor Disconnect", + "children": [], + "url": "https://2023.antflix.net#430.102_(B)_(1)" + }, + { + "body": "The motor controller disconnecting means required in accordance with 430.102(A) shall be permitted to serve as the disconnecting means for the motor if it is in sight from the motor location and the driven machinery location. Exception to (1) and (2): The disconnecting means for the motor shall not be required under either of the following conditions if the motor controller disconnecting means required in 430.102(A) is lockable in accordance with 110.25: (1) Where such a location of the disconnecting means for the motor is impracticable or introduces additional or increased hazards to persons or property Informational Note No. 1: Some examples of increased or additional hazards include, but are not limited to, motors rated in excess of 100 hp, multimotor equipment, submersible motors, motors associated with adjustable-speed drives, and motors located in hazardous (classified) locations. (2) In industrial installations, with written safety procedures, where conditions of maintenance and supervision ensure that only qualified persons service the equipment Informational Note No. 2: See NFPA 70E-2021, Standard for Electrical Safety in the Workplace, for information on lockout/tagout procedures. [430.102_(B)_(2)](https://2023.antflix.net#430.102_(B)_(2))", + "displayTitle": "(2) Motor Controller Disconnect", + "children": [], + "url": "https://2023.antflix.net#430.102_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#430.102_(B)" + } + ], + "url": "https://2023.antflix.net#430.102" + }, + { + "body": "The disconnecting means shall open all ungrounded supply conductors and shall be designed so that no pole can be operated independently. The disconnecting means shall be permitted in the same enclosure with the motor controller. The disconnecting means shall be designed so that it cannot be closed automatically. Informational Note: See 430.113 for equipment receiving energy from more than one source. [430.103](https://2023.antflix.net#430.103)", + "displayTitle": "430.103 Operation", + "children": [], + "url": "https://2023.antflix.net#430.103" + }, + { + "body": "The disconnecting means shall plainly indicate whether it is in the open (off) or closed (on) position. [430.104](https://2023.antflix.net#430.104)", + "displayTitle": "430.104 To Be Indicating", + "children": [], + "url": "https://2023.antflix.net#430.104" + }, + { + "body": "One pole of the disconnecting means shall be permitted to disconnect a permanently grounded conductor, provided the disconnecting means is designed so that the pole in the grounded conductor cannot be opened without simultaneously disconnecting all conductors of the circuit. [430.105](https://2023.antflix.net#430.105)", + "displayTitle": "430.105 Grounded Conductors", + "children": [], + "url": "https://2023.antflix.net#430.105" + }, + { + "body": "At least one of the disconnecting means shall be readily accessible. [430.107](https://2023.antflix.net#430.107)", + "displayTitle": "430.107 Readily Accessible", + "children": [], + "url": "https://2023.antflix.net#430.107" + }, + { + "body": "Every disconnecting means in the motor circuit between the point of attachment to the feeder or branch circuit and the point of connection to the motor shall comply with the requirements of 430.109 and 430.110. [430.108](https://2023.antflix.net#430.108)", + "displayTitle": "430.108 Every Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#430.108" + }, + { + "body": "The disconnecting means shall be a type in accordance with 430.109(A), unless otherwise permitted in 430.109(B) through (G), under the conditions specified. [430.109](https://2023.antflix.net#430.109)", + "displayTitle": "430.109 Type", + "children": [ + { + "displayTitle": "(A) General", + "children": [ + { + "body": "A listed motor-circuit switch rated in horsepower. [430.109_(A)_(1)](https://2023.antflix.net#430.109_(A)_(1))", + "displayTitle": "(1) Motor-Circuit Switch", + "children": [], + "url": "https://2023.antflix.net#430.109_(A)_(1)" + }, + { + "body": "A listed molded case circuit breaker. [430.109_(A)_(2)](https://2023.antflix.net#430.109_(A)_(2))", + "displayTitle": "(2) Molded Case Circuit Breaker", + "children": [], + "url": "https://2023.antflix.net#430.109_(A)_(2)" + }, + { + "body": "A listed molded case switch. [430.109_(A)_(3)](https://2023.antflix.net#430.109_(A)_(3))", + "displayTitle": "(3) Molded Case Switch", + "children": [], + "url": "https://2023.antflix.net#430.109_(A)_(3)" + }, + { + "body": "An instantaneous-trip circuit breaker that is part of a listed combination motor controller. [430.109_(A)_(4)](https://2023.antflix.net#430.109_(A)_(4))", + "displayTitle": "(4) Instantaneous-Trip Circuit Breaker", + "children": [], + "url": "https://2023.antflix.net#430.109_(A)_(4)" + }, + { + "body": "Listed self-protected combination motor controller. [430.109_(A)_(5)](https://2023.antflix.net#430.109_(A)_(5))", + "displayTitle": "(5) Self-Protected Combination Motor Controller", + "children": [], + "url": "https://2023.antflix.net#430.109_(A)_(5)" + }, + { + "body": "Listed manual motor controllers additionally marked \"Suitable as Motor Disconnect\" shall be permitted as a disconnecting means where installed between the final motor branch-circuit short-circuit protective device and the motor. Listed manual motor controllers additionally marked \"Suitable as Motor Disconnect\" shall be permitted as disconnecting means on the line side of the fuses in accordance with 430.52(C)(5). In this case, the fuses permitted in 430.52(C)(5) shall be considered supplementary fuses, and suitable branch-circuit short-circuit and ground-fault protective devices shall be installed on the line side of the manual motor controller additionally marked \"Suitable as Motor Disconnect.\" [430.109_(A)_(6)](https://2023.antflix.net#430.109_(A)_(6))", + "displayTitle": "(6) Manual Motor Controller", + "children": [], + "url": "https://2023.antflix.net#430.109_(A)_(6)" + }, + { + "body": "System isolation equipment shall be listed for disconnection purposes. System isolation equipment shall be installed on the load side of the overcurrent protection and its disconnecting means. The disconnecting means shall be one of the types permitted by 430.109(A)(1) through (A)(3). [430.109_(A)_(7)](https://2023.antflix.net#430.109_(A)_(7))", + "displayTitle": "(7) System Isolation Equipment", + "children": [], + "url": "https://2023.antflix.net#430.109_(A)_(7)" + } + ], + "url": "https://2023.antflix.net#430.109_(A)" + }, + { + "body": "For stationary motors of 1/8 hp or less, the branch-circuit overcurrent device shall be permitted to serve as the disconnecting means. [430.109_(B)](https://2023.antflix.net#430.109_(B))", + "displayTitle": "(B) Stationary Motors of 1/8 Horsepower or Less", + "children": [], + "url": "https://2023.antflix.net#430.109_(B)" + }, + { + "body": "For stationary motors rated at 2 hp or less and 300 volts or less, the disconnecting means shall be permitted to be one of the following devices: A general-use switch having an ampere rating not less than twice the full-load current rating of the motorOn ac circuits, a general-use snap switch suitable only for use on ac (not general-use ac\u2014dc snap switches) where the motor full-load current rating is not more than 80 percent of the ampere rating of the switchA listed manual motor controller having a horsepower rating not less than the rating of the motor and marked \"Suitable as Motor Disconnect\" [430.109_(C)](https://2023.antflix.net#430.109_(C))", + "displayTitle": "(C) Stationary Motors of 2 Horsepower or Less", + "children": [], + "url": "https://2023.antflix.net#430.109_(C)" + }, + { + "body": "For motors of over 2 hp up to and including 100 hp, the separate disconnecting means required for a motor with an autotransformer-type motor controller shall be permitted to be a general-use switch where all of the following provisions are met: The motor drives a generator that is provided with overload protection.The motor controller is capable of interrupting the locked-rotor current of the motors, is provided with a no voltage release, and is provided with running overload protection not exceeding 125 percent of the motor full-load current rating.Separate fuses or an inverse time circuit breaker rated or set at not more than 150 percent of the motor full-load current is provided in the motor branch circuit. [430.109_(D)](https://2023.antflix.net#430.109_(D))", + "displayTitle": "(D) Autotransformer-Type Controlled Motors", + "children": [], + "url": "https://2023.antflix.net#430.109_(D)" + }, + { + "body": "For stationary motors rated at more than 40 hp dc or 100 hp ac, the disconnecting means shall be permitted to be a general-use or isolating switch where plainly marked \"Do not operate under load.\" [430.109_(E)](https://2023.antflix.net#430.109_(E))", + "displayTitle": "(E) Isolating Switches", + "children": [], + "url": "https://2023.antflix.net#430.109_(E)" + }, + { + "body": "For a cord-and-plug-connected motor, a horsepower-rated attachment plug and receptacle, flanged surface inlet and cord connector, or attachment plug and cord connector having ratings not less than the motor ratings shall be permitted to serve as the disconnecting means. Horsepower-rated attachment plugs, flanged surface inlets, receptacles, or cord connectors shall not be required for cord-and-plug-connected appliances in accordance with 422.33, room air conditioners in accordance with 440.63, or portable motors rated 1/3 hp or less. [430.109_(F)](https://2023.antflix.net#430.109_(F))", + "displayTitle": "(F) Cord-and-Plug-Connected Motors", + "children": [], + "url": "https://2023.antflix.net#430.109_(F)" + }, + { + "body": "For torque motors, the disconnecting means shall be permitted to be a general-use switch. [430.109_(G)](https://2023.antflix.net#430.109_(G))", + "displayTitle": "(G) Torque Motors", + "children": [], + "url": "https://2023.antflix.net#430.109_(G)" + } + ], + "url": "https://2023.antflix.net#430.109" + }, + { + "displayTitle": "430.110 Current Rating and Interrupting Capacity", + "children": [ + { + "body": "The disconnecting means for motor circuits rated 1000 volts, nominal, or less shall have a current rating not less than 115 percent of the full-load current rating of the motor. Exception: A listed unfused motor-circuit switch having a horsepower rating not less than the motor horsepower shall be permitted to have a current rating less than 115 percent of the full-load current rating of the motor. [430.110_(A)](https://2023.antflix.net#430.110_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#430.110_(A)" + }, + { + "body": "Disconnecting means for a torque motor shall have a current rating of at least 115 percent of the motor nameplate current. [430.110_(B)](https://2023.antflix.net#430.110_(B))", + "displayTitle": "(B) For Torque Motors", + "children": [], + "url": "https://2023.antflix.net#430.110_(B)" + }, + { + "body": "Where two or more motors are used together or where one or more motors are used in combination with other loads, such as resistance heaters, and where the combined load can be simultaneous on a single disconnecting means, the current and horsepower ratings of the combined load shall be determined in accordance with 430.110(C)(1) through (C)(3). [430.110_(C)](https://2023.antflix.net#430.110_(C))", + "displayTitle": "(C) For Combination Loads", + "children": [ + { + "body": "The rating of the disconnecting means shall be determined from the sum of all currents, including resistance loads, at the full-load condition and also at the locked-rotor condition. The combined full-load current and the combined locked-rotor current so obtained shall be considered as a single motor for the purpose of this requirement. The full-load current equivalent to the horsepower rating of each motor shall be selected from Table 430.247, Table 430.248, Table 430.249, or Table 430.250. These full-load currents shall be added to the rating in amperes of other loads to obtain an equivalent full-load current for the combined load. The locked-rotor current equivalent to the horsepower rating of each motor shall be selected from Table 430.251(A) or Table 430.251(B). The locked-rotor currents shall be added to the rating in amperes of other loads to obtain an equivalent locked-rotor current for the combined load. Where two or more motors or other loads cannot be started simultaneously, the largest sum of locked-rotor currents of a motor or group of motors that can be started simultaneously and the full-load currents of other concurrent loads shall be permitted to be used to determine the equivalent locked-rotor current for the simultaneous combined loads. In cases where different current ratings are obtained when applying these tables, the largest value obtained shall be used. Exception No. 1: The locked-rotor current equivalent to the horsepower rating of each polyphase motor with design letter A shall be one of following: (1) If available, the motor's marked value of locked-rotor amperes (2) In the absence of a marked value of locked-rotor amperes for the motor, the value calculated from Equation 430.110(C)(1)a: [430.110(C)(1)a] where: kVA/hp = maximum range value of kilovolt-amperes per horsepower with locked rotor in Table 430.7(B) associated with the motor's marked locked-rotor indicating code letter Informational Note: Equation 430.110(C)(1)a is obtained by solving for locked-rotor amperes in the formula for \"kilovolt-amperes per horsepower with locked rotor,\" as follows: [430.110(C)(1)b] The numerator of Equation 430.110(C)(1)b for kilovolt-amperes per horsepower is the apparent power input to a three-phase motor with locked rotor in units of volt-amperes. The factor of 1000 VA/kVA in the denominator converts this value to units of kilovolt-amperes and \"(marked value of rated horsepower)\" in the denominator converts this to kilovolt-amperes per horsepower. Note that \"motor's marked value of rated volts\" is a line-to-line value and \"locked-rotor amperes\" is a line value as opposed to a phase value. Exception No. 2: Where part of the concurrent load is resistance load, and where the disconnecting means is a switch rated in horsepower and current, the switch used shall be permitted to have a horsepower rating not less than the combined load of the motor(s) if the current rating of the switch is not less than the locked-rotor current of the motor(s) plus the resistance load. [430.110_(C)_(1)](https://2023.antflix.net#430.110_(C)_(1))", + "displayTitle": "(1) Horsepower Rating", + "children": [], + "url": "https://2023.antflix.net#430.110_(C)_(1)" + }, + { + "body": "The current rating of the disconnecting means shall not be less than 115 percent of the sum of all currents at the full-load condition determined in accordance with 430.110(C)(1). Exception: A listed nonfused motor-circuit switch having a horsepower rating equal to or greater than the equivalent horsepower of the combined loads, determined in accordance with 430.110(C)(1), shall be permitted to have a current rating less than 115 percent of the sum of all currents at the full-load condition. [430.110_(C)_(2)](https://2023.antflix.net#430.110_(C)_(2))", + "displayTitle": "(2) Current Rating", + "children": [], + "url": "https://2023.antflix.net#430.110_(C)_(2)" + }, + { + "body": "For small motors not covered by Table 430.247, Table 430.248, Table 430.249, or Table 430.250, the locked-rotor current shall be assumed to be six times the full-load current. [430.110_(C)_(3)](https://2023.antflix.net#430.110_(C)_(3))", + "displayTitle": "(3) Small Motors", + "children": [], + "url": "https://2023.antflix.net#430.110_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#430.110_(C)" + } + ], + "url": "https://2023.antflix.net#430.110" + }, + { + "body": "A switch or circuit breaker shall be permitted to be used as both the motor controller and disconnecting means if it complies with 430.111(A) and is one of the types specified in 430.111 (B). [430.111](https://2023.antflix.net#430.111)", + "displayTitle": "430.111 Switch or Circuit Breaker as Both Motor Controller and Disconnecting Means", + "children": [ + { + "body": "The switch or circuit breaker complies with the requirements for motor controllers specified in 430.83, opens all ungrounded conductors to the motor, and is protected by an overcurrent device in each ungrounded conductor (which shall be permitted to be the branch-circuit fuses). The overcurrent device protecting the motor controller shall be permitted to be part of the motor controller assembly or shall be permitted to be separate. An autotransformer-type motor controller shall be provided with a separate disconnecting means. [430.111_(A)](https://2023.antflix.net#430.111_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#430.111_(A)" + }, + { + "body": "The device shall be one of the types specified in 430.111(B)(1), (B)(2), or (B)(3). [430.111_(B)](https://2023.antflix.net#430.111_(B))", + "displayTitle": "(B) Type", + "children": [ + { + "body": "An air-break switch, operable directly by applying the hand to a lever or handle. [430.111_(B)_(1)](https://2023.antflix.net#430.111_(B)_(1))", + "displayTitle": "(1) Air-Break Switch", + "children": [], + "url": "https://2023.antflix.net#430.111_(B)_(1)" + }, + { + "body": "An inverse time circuit breaker operable directly by applying the hand to a lever or handle. The circuit breaker shall be permitted to be both power-operable and manually operable. [430.111_(B)_(2)](https://2023.antflix.net#430.111_(B)_(2))", + "displayTitle": "(2) Inverse Time Circuit Breaker", + "children": [], + "url": "https://2023.antflix.net#430.111_(B)_(2)" + }, + { + "body": "An oil switch used on a circuit whose rating does not exceed 1000 volts or 100 amperes, or by special permission on a circuit exceeding this capacity where under expert supervision. The oil switch shall be permitted to be both power-operable and manually operable. [430.111_(B)_(3)](https://2023.antflix.net#430.111_(B)_(3))", + "displayTitle": "(3) Oil Switch", + "children": [], + "url": "https://2023.antflix.net#430.111_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#430.111_(B)" + } + ], + "url": "https://2023.antflix.net#430.111" + }, + { + "body": "Each motor shall be provided with an individual disconnecting means. Exception: A single disconnecting means shall be permitted to serve a group of motors under any one of the conditions of (1), (2), and (3). The single disconnecting means shall be rated in accordance with 430.110(C). (1) Where a number of motors drive several parts of a single machine or piece of apparatus, such as metal- and woodworking machines, cranes, and hoists. (2) Where a group of motors is under the protection of one set of branch-circuit protective devices as permitted by 430.53(A). (3) Where a group of motors is in a single room within sight from the location of the disconnecting means. [430.112](https://2023.antflix.net#430.112)", + "displayTitle": "430.112 Motors Served by Single Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#430.112" + }, + { + "body": "Motor and motor-operated equipment receiving electric energy from more than one source shall be provided with disconnecting means from each source of electric energy immediately adjacent to the equipment served. Each source shall be permitted to have a separate disconnecting means. Where multiple disconnecting means are provided, a permanent warning sign shall be provided on or adjacent to each disconnecting means indicating that multiple sources must be shut off to remove all power to the equipment. The sign at each disconnect shall identify the other specific circuits. Exception No. 1: Where a motor receives electric energy from more than one source, the disconnecting means for the main power supply to the motor shall not be required to be immediately adjacent to the motor if the motor controller disconnecting means is lockable in accordance with 110.25. Exception No. 2: A separate disconnecting means shall not be required for a Class 2 remote-control circuit complying with Parts I and II of Article 725, rated not more than 30 volts, and isolated and ungrounded. [430.113](https://2023.antflix.net#430.113)", + "displayTitle": "430.113 Energy From More Than One Source", + "children": [], + "url": "https://2023.antflix.net#430.113" + }, + { + "displayTitle": "Part X Adjustable-Speed Drive Systems", + "children": [], + "url": "https://2023.antflix.net#divider_1_X" + }, + { + "body": "The installation requirements for Part I through Part IX are applicable unless modified or supplemented by Part X. Power conversion equipment used in adjustable-speed drive systems shall comply with Part X for an input or output rated 1000 volts or lower and with Part XI for an input or output rated over 1000 volts. [430.120](https://2023.antflix.net#430.120)", + "displayTitle": "430.120 General", + "children": [], + "url": "https://2023.antflix.net#430.120" + }, + { + "displayTitle": "430.122 Conductors \u2014 Minimum Size and Ampacity", + "children": [ + { + "body": "Circuit conductors supplying power conversion equipment included as part of an adjustable-speed drive system shall have an ampacity not less than 125 percent of the rated input current to the power conversion equipment. Informational Note: Power conversion equipment can have multiple power ratings and corresponding input currents. [430.122_(A)](https://2023.antflix.net#430.122_(A))", + "displayTitle": "(A) Branch/Feeder Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#430.122_(A)" + }, + { + "body": "The conductors between the power conversion equipment and the motor shall have an ampacity equal to or larger than 125 percent of the motor full-load current as determined by 430.6(A) or (B). Exception: If the power conversion equipment is listed and marked as \"Suitable for Output Motor Conductor Protection,\" the conductor between the power conversion equipment and the motor shall have an ampacity equal to or greater than the larger of the following: (1) 125 percent of the motor full-load current as determined by 430.6(A) or (B) (2) The ampacity of the minimum conductor size marked on the power conversion equipment Informational Note No. 1: See 430.130 and 430.131 for branch circuit protection requirements. The minimum ampacity required of output conductors is often different than that of the conductors supplying the power conversion equipment. Informational Note No. 2: Circuit conductors on the output of an adjustable-speed drive system are susceptible to breakdown under certain conditions due to the characteristics of the output waveform of the drive. Factors affecting the conductors include, but are not limited to, the output voltage, frequency, and current; the length of the conductors; the spacing between the conductors; and the dielectric strength of the conductor insulation. Methods to mitigate breakdown include consideration of one or more of these factors. [430.122_(B)](https://2023.antflix.net#430.122_(B))", + "displayTitle": "(B) Output Conductors", + "children": [], + "url": "https://2023.antflix.net#430.122_(B)" + }, + { + "body": "The ampacity of circuit conductors supplying power conversion equipment included as part of an adjustable-speed drive system that utilizes a bypass device shall be the larger of either of the following: 125 percent of the rated input current to the power conversion equipment125 percent of the motor full-load current rating determined in accordance with 430.6 [430.122_(C)](https://2023.antflix.net#430.122_(C))", + "displayTitle": "(C) Bypass Device", + "children": [], + "url": "https://2023.antflix.net#430.122_(C)" + }, + { + "body": "Conductors supplying several motors or a motor and other loads, including power conversion equipment, shall have ampacity in accordance with 430.24, using the rated input current of the power conversion equipment for purposes of calculating ampacity. [430.122_(D)](https://2023.antflix.net#430.122_(D))", + "displayTitle": "(D) Several Motors or a Motor and Other Loads", + "children": [], + "url": "https://2023.antflix.net#430.122_(D)" + } + ], + "url": "https://2023.antflix.net#430.122" + }, + { + "body": "Overload protection of the motor shall be provided. [430.124](https://2023.antflix.net#430.124)", + "displayTitle": "430.124 Overload Protection", + "children": [ + { + "body": "Where the power conversion equipment is marked to indicate that motor overload protection is included, additional overload protection shall not be required. [430.124_(A)](https://2023.antflix.net#430.124_(A))", + "displayTitle": "(A) Included in Power Conversion Equipment", + "children": [], + "url": "https://2023.antflix.net#430.124_(A)" + }, + { + "body": "For adjustable-speed drive systems that utilize a bypass device to allow motor operation at rated full-load speed, motor overload protection as described in Article 430, Part III, shall be provided in the bypass circuit. [430.124_(B)](https://2023.antflix.net#430.124_(B))", + "displayTitle": "(B) Bypass Circuits", + "children": [], + "url": "https://2023.antflix.net#430.124_(B)" + }, + { + "body": "For multiple motor application, individual motor overload protection shall be provided in accordance with Article 430, Part III. [430.124_(C)](https://2023.antflix.net#430.124_(C))", + "displayTitle": "(C) Multiple Motor Applications", + "children": [], + "url": "https://2023.antflix.net#430.124_(C)" + } + ], + "url": "https://2023.antflix.net#430.124" + }, + { + "displayTitle": "430.126 Motor Overtemperature Protection", + "children": [ + { + "body": "Adjustable-speed drive systems shall protect against motor overtemperature conditions where the motor is not rated to operate at the nameplate rated current over the speed range required by the application. This protection shall be provided in addition to the conductor protection required in 430.32. Protection shall be provided by one of the following means: Motor thermal protector in accordance with 430.32Adjustable-speed drive system with load and speed-sensitive overload protection and thermal memory retention upon shutdown or power lossException to (2): Thermal memory retention upon shutdown or power loss is not required for continuous duty loads.Overtemperature protection relay utilizing thermal sensors embedded in the motor and meeting the requirements of 430.126(A)(2)Thermal sensor embedded in the motor whose communications are received and acted upon by an adjustable-speed drive systemInformational Note: The relationship between motor current and motor temperature changes when the motor is operated by an adjustable-speed drive. In certain applications, overheating of motors can occur when operated at reduced speed, even at current levels less than a motor's rated full-load current. The overheating can be the result of reduced motor cooling when its shaft-mounted fan is operating less than rated nameplate RPM. As part of the analysis to determine whether overheating will occur, it is necessary to consider the continuous torque capability curves for the motor given the application requirements. This will assist in determining whether the motor overload protection will be able, on its own, to provide protection against overheating. These overheating protection requirements are only intended to apply to applications where an adjustable-speed drive, as defined in Article 100, is used.For motors that utilize external forced air or liquid cooling systems, overtemperature can occur if the cooling system is not operating. Although this issue is not unique to adjustable speed applications, externally cooled motors are most often encountered with such applications. In these instances, overtemperature protection using direct temperature sensing is recommended [i.e., 430.126(A)(1), (A)(3), or (A)(4)], or additional means should be provided to ensure that the cooling system is operating (flow or pressure sensing, interlocking of adjustable-speed drive system and cooling system, etc.). [430.126_(A)](https://2023.antflix.net#430.126_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#430.126_(A)" + }, + { + "body": "For multiple motor applications, individual motor overtemperature protection shall be provided as required in 430.126(A). [430.126_(B)](https://2023.antflix.net#430.126_(B))", + "displayTitle": "(B) Multiple Motor Applications", + "children": [], + "url": "https://2023.antflix.net#430.126_(B)" + }, + { + "body": "430.43 and 430.44 shall apply to the motor overtemperature protection means. [430.126_(C)](https://2023.antflix.net#430.126_(C))", + "displayTitle": "(C) Automatic Restarting and Orderly Shutdown", + "children": [], + "url": "https://2023.antflix.net#430.126_(C)" + } + ], + "url": "https://2023.antflix.net#430.126" + }, + { + "body": "The disconnecting means shall be permitted to be in the incoming line to the conversion equipment and shall have a rating not less than 115 percent of the rated input current of the conversion unit. [430.128](https://2023.antflix.net#430.128)", + "displayTitle": "430.128 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#430.128" + }, + { + "displayTitle": "430.130 Branch-Circuit Short-Circuit and Ground-Fault Protection for Single Motor Circuits Containing Power Conversion Equipment", + "children": [ + { + "body": "Circuits containing power conversion equipment shall be protected by a branch-circuit short-circuit and ground-fault protective device in accordance with all of the following: The rating and type of protection shall be determined by 430.52(C)(1), (C)(3), (C)(5), or (C)(6), using the full-load current rating of the motor load as determined by 430.6(A) or (B).Exception to (1): The rating and type of protection shall be permitted to be determined by Table 430.52(C)(1) using the power conversion equipment's rated input current where the power conversion equipment is listed and marked \"Suitable for Output Motor Conductor Protection.\"Informational Note No. 1: Motor conductor branch-circuit short-circuit and ground-fault protection from the power conversion equipment to the motor is provided by power conversion equipment that is listed and marked \"Suitable for Output Motor Conductor Protection.\"Informational Note No. 2: A motor branch circuit using power conversion equipment, including equipment listed and marked \"Suitable for Output Motor Conductor Protection,\" includes the input circuit to the power conversion equipment.Where maximum branch-circuit short-circuit and ground-fault protective ratings are stipulated for specific device types in the manufacturer's instructions for the power conversion equipment or are otherwise marked on the equipment, they shall not be exceeded even if higher values are permitted by 430.130(A)(1).A self-protected combination motor controller shall only be permitted where specifically identified in the manufacturer's instructions for the power conversion equipment or if otherwise marked on the equipment.Informational Note No. 3: The type of protective device, its rating, and its setting are often marked on or provided with the power conversion equipment.Where an instantaneous-trip circuit breaker or semiconductor fuses are permitted in accordance with the drive manufacturer's instructions for use as the branch-circuit short-circuit and ground-fault protective device for listed power conversion equipment, they shall be provided as an integral part of a single listed assembly incorporating both the protective device and power conversion equipment. [430.130_(A)](https://2023.antflix.net#430.130_(A))", + "displayTitle": "(A) Circuits Containing Power Conversion Equipment", + "children": [], + "url": "https://2023.antflix.net#430.130_(A)" + }, + { + "body": "Branch-circuit short-circuit and ground-fault protection shall also be provided for a bypass circuit/device(s). Where a single branch-circuit short-circuit and ground-fault protective device is provided for circuits containing both power conversion equipment and a bypass circuit, the branch-circuit protective device type and its rating or setting shall be in accordance with those determined for the power conversion equipment and for the bypass circuit/device(s) equipment. [430.130_(B)](https://2023.antflix.net#430.130_(B))", + "displayTitle": "(B) Bypass Circuit/Device", + "children": [], + "url": "https://2023.antflix.net#430.130_(B)" + } + ], + "url": "https://2023.antflix.net#430.130" + }, + { + "body": "For installations meeting all the requirements of 430.53 that include one or more power converters, the branch-circuit short-circuit and ground-fault protective fuses or inverse time circuit breakers shall be of a type and rating or setting permitted for use with the power conversion equipment using the full-load current rating of the connected motor load in accordance with 430.53. For the purposes of 430.53 and 430.131, power conversion equipment shall be considered to be a motor controller. [430.131](https://2023.antflix.net#430.131)", + "displayTitle": "430.131 Several Motors or Loads on One Branch Circuit Including Power Conversion Equipment", + "children": [], + "url": "https://2023.antflix.net#430.131" + }, + { + "displayTitle": "Part XI Over 1000 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#divider_0_XI" + }, + { + "body": "Part XI recognizes the additional hazard due to the use of higher voltages. It adds to or amends the other provisions of this article. [430.201](https://2023.antflix.net#430.201)", + "displayTitle": "430.201 General", + "children": [], + "url": "https://2023.antflix.net#430.201" + }, + { + "body": "In addition to the marking required by 430.8, a motor controller shall be marked with the control voltage. [430.202](https://2023.antflix.net#430.202)", + "displayTitle": "430.202 Marking on Motor Controllers", + "children": [], + "url": "https://2023.antflix.net#430.202" + }, + { + "body": "Flexible metal conduit or liquidtight flexible metal conduit not exceeding 1.8 m (6 ft) in length shall be permitted to be employed for raceway connection to a motor terminal enclosure. [430.203](https://2023.antflix.net#430.203)", + "displayTitle": "430.203 Raceway Connection to Motors", + "children": [], + "url": "https://2023.antflix.net#430.203" + }, + { + "body": "Motor controllers rated over 1000 volts shall provide wire-bending space within the enclosure for conductors installed in accordance with 305.5. [430.204](https://2023.antflix.net#430.204)", + "displayTitle": "430.204 Wire-Bending Space in Enclosures", + "children": [], + "url": "https://2023.antflix.net#430.204" + }, + { + "body": "The ampacities of conductors supplying equipment rated over 1000 volts, nominal, shall be determined in accordance with 315.60 or 430.205(A) and (B). [430.205](https://2023.antflix.net#430.205)", + "displayTitle": "430.205 Size of Conductors", + "children": [ + { + "body": "Conductors supplying motors shall be sized not less than the current trip setting of the motor overload protective device(s). [430.205_(A)](https://2023.antflix.net#430.205_(A))", + "displayTitle": "(A) General Motor Systems", + "children": [], + "url": "https://2023.antflix.net#430.205_(A)" + }, + { + "body": "For an adjustable-speed drive system, the conductors supplying the power conversion equipment shall have an ampacity not less than 125 percent of the rated input current to the power conversion equipment. [430.205_(B)](https://2023.antflix.net#430.205_(B))", + "displayTitle": "(B) Adjustable-Speed Drive Systems", + "children": [], + "url": "https://2023.antflix.net#430.205_(B)" + } + ], + "url": "https://2023.antflix.net#430.205" + }, + { + "displayTitle": "430.206 Motor-Circuit Overcurrent Protection", + "children": [ + { + "body": "Each motor circuit shall include coordinated protection to automatically interrupt overload and fault currents in the motor, the motor-circuit conductors, and the motor control apparatus. Adjustable-speed drive systems with input or output voltages over 1000 volts, nominal, shall comply with 430.124 and 430.126. All other motors shall comply with 430.206(B) through (C). Exception: Where a motor is critical to an operation and the motor should operate to failure if necessary to prevent a greater hazard to persons, the sensing device(s) shall be permitted to be connected to a supervised annunciator or alarm instead of interrupting the motor circuit. [430.206_(A)](https://2023.antflix.net#430.206_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#430.206_(A)" + }, + { + "displayTitle": "(B) Overload Protection", + "children": [ + { + "body": "Each motor shall be protected against dangerous heating due to motor overloads and failure to start by a thermal protector integral with the motor or external current-sensing devices, or both. Protective device settings for each motor circuit shall be determined under engineering supervision. [430.206_(B)_(1)](https://2023.antflix.net#430.206_(B)_(1))", + "displayTitle": "(1) Type of Overload Device", + "children": [], + "url": "https://2023.antflix.net#430.206_(B)_(1)" + }, + { + "body": "The secondary circuits of wound-rotor ac motors, including conductors, motor controllers, and resistors rated for the application, shall be considered as protected against overcurrent by the motor overload protection means. [430.206_(B)_(2)](https://2023.antflix.net#430.206_(B)_(2))", + "displayTitle": "(2) Wound-Rotor Alternating-Current Motors", + "children": [], + "url": "https://2023.antflix.net#430.206_(B)_(2)" + }, + { + "body": "Operation of the overload interrupting device shall simultaneously disconnect all ungrounded conductors. [430.206_(B)_(3)](https://2023.antflix.net#430.206_(B)_(3))", + "displayTitle": "(3) Operation", + "children": [], + "url": "https://2023.antflix.net#430.206_(B)_(3)" + }, + { + "body": "Overload sensing devices shall not automatically reset after trip unless resetting of the overload sensing device does not cause automatic restarting of the motor or there is no hazard to persons created by automatic restarting of the motor and its connected machinery. [430.206_(B)_(4)](https://2023.antflix.net#430.206_(B)_(4))", + "displayTitle": "(4) Automatic Reset", + "children": [], + "url": "https://2023.antflix.net#430.206_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#430.206_(B)" + }, + { + "displayTitle": "(C) Fault-Current Protection", + "children": [ + { + "body": "Fault-current protection shall be provided in each motor circuit as specified by either 430.206(C)(1) (a) or (C)(1)(b). A circuit breaker of suitable type and rating arranged so that it can be serviced without hazard. The circuit breaker shall simultaneously disconnect all ungrounded conductors. The circuit breaker shall be permitted to sense the fault current by means of integral or external sensing elements.Fuses of a suitable type and rating placed in each ungrounded conductor. Fuses shall be used with suitable disconnecting means, or they shall be of a type that can also serve as the disconnecting means. They shall be arranged so that they cannot be serviced while they are energized. [430.206_(C)_(1)](https://2023.antflix.net#430.206_(C)_(1))", + "displayTitle": "(1) Type of Protection", + "children": [], + "url": "https://2023.antflix.net#430.206_(C)_(1)" + }, + { + "body": "Fault-current interrupting devices shall not automatically reclose the circuit. Exception: Automatic reclosing of a circuit shall be permitted where the circuit is exposed to transient faults and where such automatic reclosing does not create a hazard to persons. [430.206_(C)_(2)](https://2023.antflix.net#430.206_(C)_(2))", + "displayTitle": "(2) Reclosing", + "children": [], + "url": "https://2023.antflix.net#430.206_(C)_(2)" + }, + { + "body": "Overload protection and fault-current protection shall be permitted to be provided by the same device. [430.206_(C)_(3)](https://2023.antflix.net#430.206_(C)_(3))", + "displayTitle": "(3) Combination Protection", + "children": [], + "url": "https://2023.antflix.net#430.206_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#430.206_(C)" + } + ], + "url": "https://2023.antflix.net#430.206" + }, + { + "body": "The ultimate trip current of overcurrent (overload) relays or other motor-protective devices used shall not exceed 115 percent of the motor controller's continuous current rating. Where the motor branch-circuit disconnecting means is separate from the motor controller, the disconnecting means current rating shall not be less than the ultimate trip setting of the overcurrent relays in the circuit. [430.207](https://2023.antflix.net#430.207)", + "displayTitle": "430.207 Rating of Motor Control Apparatus", + "children": [], + "url": "https://2023.antflix.net#430.207" + }, + { + "body": "The motor controller disconnecting means shall be a switch or circuit breaker having a voltage rating not less than that of the circuit involved, and shall be lockable in accordance with 110.25. The disconnecting means shall have a current rating of not less than 100 percent of the full-load current rating of the motor. For adjustable-speed drive systems, the disconnecting means shall have a current rating not less than 100 percent of the rated input current of the power conversion equipment. [430.208](https://2023.antflix.net#430.208)", + "displayTitle": "430.208 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#430.208" + }, + { + "displayTitle": "Part XII Protection of Live Parts \u2014 All Voltages", + "children": [], + "url": "https://2023.antflix.net#divider_0_XII" + }, + { + "body": "Part XII specifies that live parts shall be protected in an approved manner for the hazard involved. [430.231](https://2023.antflix.net#430.231)", + "displayTitle": "430.231 General", + "children": [], + "url": "https://2023.antflix.net#430.231" + }, + { + "body": "Exposed live parts of motors and motor controllers operating at 50 volts or more between terminals shall be guarded against accidental contact by enclosure or by location as follows: By installation in a room or enclosure that is accessible only to qualified personsBy installation on a suitable balcony, gallery, or platform, elevated and arranged so as to exclude unqualified personsBy elevation 2.5 m (8 ft) or more above the floorException: Live parts of motors operating at more than 50 volts between terminals shall not require additional guarding for stationary motors that have commutators, collectors, and brush rigging located inside of motor-end brackets and not conductively connected to supply circuits operating at more than 150 volts to ground. [430.232](https://2023.antflix.net#430.232)", + "displayTitle": "430.232 Where Required", + "children": [], + "url": "https://2023.antflix.net#430.232" + }, + { + "body": "Where live parts of motors or motor controllers operating at over 50 volts to ground are guarded against accidental contact only by location as specified in 430.232, and where adjustment or other attendance could be necessary during the operation of the apparatus, suitable insulating mats or platforms shall be provided so that the attendant cannot readily touch live parts unless standing on the mats or platforms. Informational Note: See 110.26 and 110.34 for information on working space. [430.233](https://2023.antflix.net#430.233)", + "displayTitle": "430.233 Guards for Attendants", + "children": [], + "url": "https://2023.antflix.net#430.233" + }, + { + "displayTitle": "Part XIII Grounding - All Voltages", + "children": [], + "url": "https://2023.antflix.net#divider_0_XIII" + }, + { + "body": "Part XIII specifies the grounding of exposed non-current-carrying metal parts, likely to become energized, of motor and motor controller frames to limit voltage to ground in the event of accidental contact between energized parts and frames. Insulation, isolation, or guarding are suitable alternatives to grounding of motors under certain conditions. [430.241](https://2023.antflix.net#430.241)", + "displayTitle": "430.241 General", + "children": [], + "url": "https://2023.antflix.net#430.241" + }, + { + "body": "The frames of stationary motors shall be grounded under any of the following conditions: Where supplied by metal-enclosed wiringWhere in a wet location and not isolated or guardedIf in a hazardous (classified) locationIf the motor operates with any terminal at over 150 volts to groundWhere the frame of the motor is not grounded, it shall be permanently and effectively insulated from the ground. [430.242](https://2023.antflix.net#430.242)", + "displayTitle": "430.242 Stationary Motors", + "children": [], + "url": "https://2023.antflix.net#430.242" + }, + { + "body": "The frames of portable motors that operate over 150 volts to ground shall be guarded or grounded. Informational Note No. 1: See 250.114(4) for grounding of portable appliances in other than residential occupancies. Informational Note No. 2: See 250.119(D) for color of equipment grounding conductor in flexible cords. Exception No. 1: Listed motor-operated tools, listed motor-operated appliances, and listed motor-operated equipment shall not be required to be grounded where protected by a system of double insulation or its equivalent. Double-insulated equipment shall be distinctively marked. Exception No. 2: Listed motor-operated tools, listed motor-operated appliances, and listed motor-operated equipment connected by a cord and attachment plug other than those required to be grounded in accordance with 250.114. [430.243](https://2023.antflix.net#430.243)", + "displayTitle": "430.243 Portable Motors", + "children": [], + "url": "https://2023.antflix.net#430.243" + }, + { + "body": "Motor controller enclosures shall be connected to the equipment grounding conductor regardless of voltage. Motor controller enclosures shall have means for attachment of an equipment grounding conductor termination in accordance with 250.8. Exception: Enclosures attached to ungrounded portable equipment shall not be required to be grounded. [430.244](https://2023.antflix.net#430.244)", + "displayTitle": "430.244 Motor Controllers", + "children": [], + "url": "https://2023.antflix.net#430.244" + }, + { + "body": "Connection to the equipment grounding conductor shall be done in accordance with Part VI of Article 250. [430.245](https://2023.antflix.net#430.245)", + "displayTitle": "430.245 Method of Grounding", + "children": [ + { + "body": "Where the wiring to motors is metal-enclosed cable or in metal raceways, junction boxes to house motor terminals shall be provided, and the armor of the cable or the metal raceways shall be connected to them in accordance with 250.96(A) and 250.97. [430.245_(A)](https://2023.antflix.net#430.245_(A))", + "displayTitle": "(A) Grounding Through Terminal Housings", + "children": [], + "url": "https://2023.antflix.net#430.245_(A)" + }, + { + "body": "The junction box required by 430.245(A) shall be permitted to be separated from the motor by not more than 1.8 m (6 ft) if the leads to the motor are stranded conductors within Type AC cable, interlocked metal tape Type MC cable where listed and identified in accordance with 250.118(A)(10)b., or armored cord or are stranded leads enclosed in liquidtight flexible metal conduit, flexible metal conduit, intermediate metal conduit, rigid metal conduit, or electrical metallic tubing not smaller than metric designator 12 (trade size 3/8), with the armor or raceway being connected both to the motor and to the box. Liquidtight flexible nonmetallic conduit and rigid nonmetallic conduit shall be permitted to enclose the leads to the motor if the leads are stranded and the required equipment grounding conductor is connected to both the motor and to the box. Where stranded leads are used, protected as specified above, each strand within the conductor shall be not larger than 10 AWG and shall comply with other requirements of this Code for conductors to be used in raceways. [430.245_(B)](https://2023.antflix.net#430.245_(B))", + "displayTitle": "(B) Separation of Junction Box From Motor", + "children": [], + "url": "https://2023.antflix.net#430.245_(B)" + }, + { + "body": "Instrument transformer secondaries and exposed non-current-carrying metal or other conductive parts or cases of instrument transformers, meters, instruments, and relays shall be grounded in accordance with 250.170 through 250.178. [430.245_(C)](https://2023.antflix.net#430.245_(C))", + "displayTitle": "(C) Grounding of Motor Controller-Mounted Devices", + "children": [], + "url": "https://2023.antflix.net#430.245_(C)" + } + ], + "url": "https://2023.antflix.net#430.245" + }, + { + "body": "Table 430.247 Full-Load Current in Amperes, Direct-Current MotorsThe following values of full-load currents* are for motors running at base speed. Horsepower Armature Voltage Rating* 90 Volts 120 Volts 180 Volts 240 Volts 500 Volts 550 Volts 1/4 4.0 3.1 2.0 1.6 - - 1/3 5.2 4.1 2.6 2.0 - - 1/2 6.8 5.4 3.4 2.7 - - 3/4 9.6 7.6 4.8 3.8 - - 1 12.2 9.5 6.1 4.7 - - 11/2 - 13.2 8.3 6.6 - - 2 - 17 10.8 8.5 - - 3 - 25 16 12.2 - - 5 - 40 27 20 - - 71/2 - 58 - 29 13.6 12.2 10 - 76 - 38 18 16 15 - - - 55 27 24 20 - - - 72 34 31 25 - - - 89 43 38 30 - - - 106 51 46 40 - - - 140 67 61 50 - - - 173 83 75 60 - - - 206 99 90 75 - - - 255 123 111 100 - - - 341 164 148 125 - - - 425 205 185 150 - - - 506 246 222 200 - - - 675 330 294 *These are average dc quantities. Table 430.248 Full-Load Currents in Amperes, Single-Phase Alternating-Current MotorsThe following values of full-load currents are for motors running at usual speeds and motors with normal torque characteristics. The voltages listed are rated motor voltages. The currents listed shall be permitted for system voltage ranges of 110 to 120 and 220 to 240 volts. Horsepower 115 Volts 200 Volts 208 Volts 230 Volts 1/6 4.4 2.5 2.4 2.2 1/4 5.8 3.3 3.2 2.9 1/3 7.2 4.1 4.0 3.6 1/2 9.8 5.6 5.4 4.9 3/4 13.8 7.9 7.6 6.9 1 16 9.2 8.8 8.0 11/2 20 11.5 11.0 10 2 24 13.8 13.2 12 3 34 19.6 18.7 17 5 56 32.2 30.8 28 71/2 80 46.0 44.0 40 10 100 57.5 55.0 50 Table 430.249 Full-Load Current, Two-Phase Alternating-Current Motors (4-Wire)The following values of full-load current are for motors running at speeds usual for belted motors and motors with normal torque characteristics. Current in the common conductor of a 2-phase, 3-wire system will be 1.41 times the value given. The voltages listed are rated motor voltages. The currents listed shall be permitted for system voltage ranges of 110 to 120, 220 to 240, 440 to 480, 550 to 600, and 2300 to 2400 volts. Horsepower Induction-Type Squirrel Cage and Wound Rotor (Amperes) 115 Volts 230 Volts 460 Volts 575 Volts 2300 Volts 1/2 4.0 2.0 1.0 0.8 - 3/4 4.8 2.4 1.2 1.0 - 1 6.4 3.2 1.6 1.3 - 11/2 9.0 4.5 2.3 1.8 - 2 11.8 5.9 3.0 2.4 - 3 - 8.3 4.2 3.3 - 5 - 13.2 6.6 5.3 - 71/2 - 19 9.0 8.0 - 10 - 24 12 10 - 15 - 36 18 14 - 20 - 47 23 19 - 25 - 59 29 24 - 30 - 69 35 28 - 40 - 90 45 36 - 50 - 113 56 45 - 60 - 133 67 53 14 75 - 166 83 66 18 100 - 218 109 87 23 125 - 270 135 108 28 150 - 312 156 125 32 200 - 416 208 167 43 Table 430.250 Full-Load Current, Three-Phase Alternating-Current MotorsThe following values of full-load currents are typical for motors running at speeds usual for belted motors and motors with normal torque characteristics. The voltages listed are rated motor voltages. The currents listed shall be permitted for system voltage ranges of 110 to 120, 220 to 240, 440 to 480, 550 to 600, and 2300 to 2400 volts. Horsepower Induction-Type Squirrel Cage and Wound Rotor (Amperes) Synchronous-Type Unity Power Factor* (Amperes) 115 Volts 200 Volts 208 Volts 230 Volts 460 Volts 575 Volts 2300 Volts 230 Volts 460 Volts 575 Volts 2300 Volts 1/2 4.4 2.5 2.4 2.2 1.1 0.9 - - - - - 3/4 6.4 3.7 3.5 3.2 1.6 1.3 - - - - - 1 8.4 4.8 4.6 4.2 2.1 1.7 - - - - - 11/2 12.0 6.9 6.6 6.0 3.0 2.4 - - - - - 2 13.6 7.8 7.5 6.8 3.4 2.7 - - - - - 3 - 11.0 10.6 9.6 4.8 3.9 - - - - - 5 - 17.5 16.7 15.2 7.6 6.1 - - - - - 71/2 - 25.3 24.2 22 11 9 - - - - - 10 - 32.2 30.8 28 14 11 - - - - - 15 - 48.3 46.2 42 21 17 - - - - - 20 - 62.1 59.4 54 27 22 - - - - - 25 - 78.2 74.8 68 34 27 - 53 26 21 - 30 - 92 88 80 40 32 - 63 32 26 - 40 - 120 114 104 52 41 - 83 41 33 - 50 - 150 143 130 65 52 - 104 52 42 - 60 - 177 169 154 77 62 16 123 61 49 12 75 - 221 211 192 96 77 20 155 78 62 15 100 - 285 273 248 124 99 26 202 101 81 20 125 - 359 343 312 156 125 31 253 126 101 25 150 - 414 396 360 180 144 37 302 151 121 30 200 552 528 480 240 192 49 400 201 161 40 250 - - - - 302 242 60 - - - - 300 - - - - 361 289 72 - - - - 350 - - - - 414 336 83 - - - - 400 - - - - 477 382 95 - - - - 450 - - - - 515 412 103 - - - - 500 - - - - 590 472 118 - - - - *For 90 and 80 percent power factor, the figures shall be multiplied by 1.1 and 1.25, respectively. Table 430.251(A) Conversion Table of Single-Phase Locked-Rotor Currents for Selection of Disconnecting Means and Controllers as Determined from Horsepower and Voltage RatingFor use only with 430.110, 440.12, 440.41, and 455.8(C). Rated Horsepower Maximum Locked-Rotor Current in Amperes, Single-Phase 115 Volts 208 Volts 230 Volts 1/2 58.8 32.5 29.4 3/4 82.8 45.8 41.4 1 96 53 48 11/2 120 66 60 2 144 80 72 3 204 113 102 5 336 186 168 71/2 480 265 240 10 1000 332 300 Table 430.251 (B) Conversion Table of Polyphase Design B, C, and D Maximum Locked-Rotor Currents for Selection of Disconnecting Means and Controllers as Determined from Horsepower and Voltage Rating and Design LetterFor use only with 430.110, 440.12, 440.41, and 455.8(C). Rated Horsepower Maximum Motor Locked-Rotor Current in Amperes, Two- and Three-Phase, Design B, C and D* 115 Volts 200 Volts 208 Volts 230 Volts 460 Volts 575 Volts B, C, D B, C, D B, C, D B, C, D B, C, D B, C, D 1/2 40 23 22.1 20 10 8 3/4 50 28.8 27.6 25 12.5 10 1 60 34.5 33 30 15 12 11/2 80 46 44 40 20 16 2 100 57.5 55 50 25 20 3 - 73.6 71 64 32 25.6 5 - 105.8 102 92 46 36.8 71/2 - 146 140 127 63.5 50.8 10 - 186.3 179 162 81 64.8 15 - 267 257 232 116 93 20 - 334 321 290 145 116 25 - 420 404 365 183 146 30 - 500 481 435 218 174 40 - 667 641 580 290 232 50 - 834 802 725 363 290 60 - 1001 962 870 435 348 75 - 1248 1200 1085 543 434 100 - 1668 1603 1450 725 580 125 - 2087 2007 1815 908 726 150 - 2496 2400 2170 1085 868 200 - 3335 3207 2900 1450 1160 250 - - - - 1825 1460 300 - - - - 2200 1760 350 - - - - 2550 2040 400 - - - - 2900 2320 450 - - - - 3250 2600 500 - - - - 3625 2900 *Design A motors are not limited to a maximum starting current or locked rotor current. [divider_0_XIV](https://2023.antflix.net#divider_0_XIV)", + "displayTitle": "Part XIV Tables", + "children": [], + "url": "https://2023.antflix.net#divider_0_XIV" + } + ], + "url": "https://2023.antflix.net#430" + }, + { + "displayTitle": "Article 440 Air-Conditioning and Refrigerating Equipment", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_67_I" + }, + { + "body": "This article applies to electric motor-driven airconditioning and refrigerating equipment and to the branch circuits and controllers for such equipment. It provides for the special considerations necessary for circuits supplying hermetic refrigerant motor-compressors and for any air-conditioning or refrigerating equipment that is supplied from a branch circuit that supplies a hermetic refrigerant motor-compressor. [440.1](https://2023.antflix.net#440.1)", + "displayTitle": "440.1 Scope", + "children": [], + "url": "https://2023.antflix.net#440.1" + }, + { + "displayTitle": "440.4 Marking on Hermetic Refrigerant Motor-Compressors and Equipment", + "children": [ + { + "body": "A hermetic refrigerant motor-compressor shall be provided with a nameplate that shall indicate the manufacturer's name, trademark, or symbol; identifying designation; phase; voltage; and frequency. The rated-load current in amperes of the motor-compressor shall be marked by the equipment manufacturer on either or both the motor-compressor nameplate and the nameplate of the equipment in which the motor-compressor is used. The locked-rotor current of each single-phase motor-compressor having a rated-load current of more than 9 amperes at 115 volts, or more than 4.5 amperes at 230 volts, and each polyphase motor-compressor shall be marked on the motor-compressor nameplate. Where a thermal protector complying with 440.52(A)(2) and (B)(2) is used, the motor-compressor nameplate or the equipment nameplate shall be marked with the words \"thermally protected.\" Where a protective system complying with 440.52(A)(4) and (B)(4) is used and is furnished with the equipment, the equipment nameplate shall be marked with the words, \"thermally protected system.\" Where a protective system complying with 440.52(A)(4) and (B)(4) is specified, the equipment nameplate shall be appropriately marked. [440.4_(A)](https://2023.antflix.net#440.4_(A))", + "displayTitle": "(A) Hermetic Refrigerant Motor-Compressor Nameplate", + "children": [], + "url": "https://2023.antflix.net#440.4_(A)" + }, + { + "body": "Multimotor and combination-load equipment shall be provided with a risible nameplate marked with the maker's name, the rating in volts, frequency and number of phases, minimum supply circuit conductor ampacity, the maximum rating of the branch-circuit short-circuit and ground-fault protective device, and the short-circuit current rating of the motor controllers or industrial control panel. The ampacity shall be calculated by using Part IV and counting all the motors and other loads that will be operated at the same time. The branch-circuit short-circuit and ground-fault protective device rating shall not exceed the value calculated by using Part III. Multimotor or combination-load equipment for use on two or more circuits shall be marked with the above information for each circuit. Exception No. 1: Multimotor and combination-load equipment that is suitable under the provisions of this article for connection to a single 15- or 20-ampere, 120-volt, or a 15-ampere, 208- or 240-volt, single-phase branch circuit shall be permitted to be marked as a single load. Exception No. 2: The minimum supply circuit conductor ampacity and the maximum rating of the branch-circuit short-circuit and ground-fault protective device shall not be required to be marked on a room air conditioner complying with 440.62(A). Exception No. 3: Multimotor and combination-load equipment used in one- and two-family dwellings or cord-and-attachment-plug-connected equipment shall not be required to be marked with a short-circuit current rating. [440.4_(B)](https://2023.antflix.net#440.4_(B))", + "displayTitle": "(B) Multimotor and Combination-Load Equipment", + "children": [], + "url": "https://2023.antflix.net#440.4_(B)" + }, + { + "body": "A hermetic refrigerant motor-compressor, or equipment containing such a compressor, having a protection system that is approved for use with the motor-compressor that it protects and that permits continuous current in excess of the specified percentage of nameplate rated-load current given in 440.52(B)(2) or (B)(4) shall also be marked with a branch-circuit selection current that complies with 440.52(B)(2) or (B)(4). This marking shall be provided by the equipment manufacturer and shall be on the nameplate(s) where the rated-load current(s) appears. [440.4_(C)](https://2023.antflix.net#440.4_(C))", + "displayTitle": "(C) Branch-Circuit Selection Current", + "children": [], + "url": "https://2023.antflix.net#440.4_(C)" + } + ], + "url": "https://2023.antflix.net#440.4" + }, + { + "body": "A controller shall be marked with the manufacturer's name, trademark, or symbol; identifying designation; voltage; phase; full-load and locked-rotor current (or horsepower) rating; and other data as may be needed to properly indicate the motor-compressor for which it is suitable. [440.5](https://2023.antflix.net#440.5)", + "displayTitle": "440.5 Marking on Controllers", + "children": [], + "url": "https://2023.antflix.net#440.5" + }, + { + "body": "The size of conductors for equipment covered by this article shall be selected from Table 310.16 through Table 310.19 or calculated in accordance with 310.14 as applicable. The required ampacity of conductors and rating of equipment shall be determined according to 440.6(A) and 440.6(B). [440.6](https://2023.antflix.net#440.6)", + "displayTitle": "440.6 Ampacity and Rating", + "children": [ + { + "body": "For a hermetic refrigerant motor-compressor, the rated-load current marked on the nameplate of the equipment in which the motor-compressor is employed shall be used in determining the rating or ampacity of the disconnecting means, the branch-circuit conductors, the controller, the branch-circuit short-circuit and ground-fault protection, and the separate motor overload protection. Where no rated-load current is shown on the equipment nameplate, the rated-load current shown on the compressor nameplate shall be used. Exception No. 1: Where so marked, the branch-circuit selection current shall be used instead of the rated-load current to determine the rating or ampacity of the disconnecting means, the branch-circuit conductors, the controller, and the branch-circuit short-circuit and ground-fault protection. Exception No. 2: For cord-and-plug-connected equipment, the nameplate marking shall be used in accordance with 440.22(B), Exception No. 2. [440.6_(A)](https://2023.antflix.net#440.6_(A))", + "displayTitle": "(A) Hermetic Refrigerant Motor-Compressor", + "children": [], + "url": "https://2023.antflix.net#440.6_(A)" + }, + { + "body": "For multimotor equipment employing a shaded-pole or permanent split-capacitor-type fan or blower motor, the full-load current for such motor marked on the nameplate of the equipment in which the fan or blower motor is employed shall be used instead of the horsepower rating to determine the ampacity or rating of the disconnecting means, the branch-circuit conductors, the controller, the branch-circuit short-circuit and ground-fault protection, and the separate overload protection. This marking on the equipment nameplate shall not be less than the current marked on the fan or blower motor nameplate. [440.6_(B)](https://2023.antflix.net#440.6_(B))", + "displayTitle": "(B) Multimotor Equipment", + "children": [], + "url": "https://2023.antflix.net#440.6_(B)" + } + ], + "url": "https://2023.antflix.net#440.6" + }, + { + "body": "In determining compliance with this article and with 430.24, 430.53(B) and 430.53(C), and 430.62(A), the highest rated (largest) motor shall be considered to be the motor that has the highest rated-load current. Where two or more motors have the same highest rated-load current, only one of them shall be considered as the highest rated (largest) motor. For other than hermetic refrigerant motor-compressors, and fan or blower motors as covered in 440.6(B), the full-load current used to determine the highest rated motor shall be the equivalent value corresponding to the motor horsepower rating selected from Table 430.248, Table 430.249, or Table 430.250. Exception: Where so marked, the branch-circuit selection current shall be used instead of the rated-load current in determining the highest rated (largest) motor-compressor. [440.7](https://2023.antflix.net#440.7)", + "displayTitle": "440.7 Highest Rated (Largest) Motor", + "children": [], + "url": "https://2023.antflix.net#440.7" + }, + { + "body": "An air-conditioning or refrigerating system shall be considered to be a single machine under the provisions of 430.87, Exception No. 1, and 430.112, Exception. The motors shall be permitted to be located remotely from each other. Air-conditioning and refrigeration equipment shall not be installed within a zone measured 900 mm (3 ft) horizontally and 2.5 m (8 ft) vertically from the top of a bathtub rim or shower stall threshold. The zone shall be all-encompassing and include the space directly over the tub or shower stall. [440.8](https://2023.antflix.net#440.8)", + "displayTitle": "440.8 Single Machine and Location", + "children": [], + "url": "https://2023.antflix.net#440.8" + }, + { + "body": "Where equipment is installed outdoors on a roof, an equipment grounding conductor of the wire type shall be installed in outdoor portions of metallic raceway systems that use compression-type fittings. [440.9](https://2023.antflix.net#440.9)", + "displayTitle": "440.9 Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#440.9" + }, + { + "displayTitle": "440.10 Short-Circuit Current Rating", + "children": [ + { + "body": "Motor controllers or industrial control panels of multimotor and combination-load equipment shall not be installed where the available fault current exceeds its short-circuit current rating as marked in accordance with 440.4(B). [440.10_(A)](https://2023.antflix.net#440.10_(A))", + "displayTitle": "(A) Installation", + "children": [], + "url": "https://2023.antflix.net#440.10_(A)" + }, + { + "body": "When motor controllers or industrial control panels of multimotor and combination-load equipment are required to be marked with a short circuit current rating, the available fault current and the date the available fault current calculation was performed shall be documented and made available to those authorized to inspect, install, or maintain the installation. [440.10_(B)](https://2023.antflix.net#440.10_(B))", + "displayTitle": "(B) Documentation", + "children": [], + "url": "https://2023.antflix.net#440.10_(B)" + } + ], + "url": "https://2023.antflix.net#440.10" + }, + { + "displayTitle": "Part II Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#divider_67_II" + }, + { + "body": "Disconnecting means shall be capable of disconnecting air-conditioning and refrigerating equipment, including motor-compressors and controllers, from the circuit conductors. If the disconnecting means is readily accessible to unqualified persons, any enclosure door or hinged cover of a disconnecting means enclosure that exposes energized parts when open shall require a tool to open or be capable of being locked. [440.11](https://2023.antflix.net#440.11)", + "displayTitle": "440.11 General", + "children": [], + "url": "https://2023.antflix.net#440.11" + }, + { + "displayTitle": "440.12 Rating and Interrupting Capacity", + "children": [ + { + "body": "A disconnecting means serving a hermetic refrigerant motor-compressor shall be selected on the basis of the nameplate rated-load current or branch-circuit selection current, whichever is greater, and locked-rotor current, respectively, of the motor-compressor as follows. [440.12_(A)](https://2023.antflix.net#440.12_(A))", + "displayTitle": "(A) Hermetic Refrigerant Motor-Compressor", + "children": [ + { + "body": "The ampere rating shall be at least 115 percent of the nameplate rated-load current or branch-circuit selection current, whichever is greater. Exception: A listed unfused motor circuit switch, without fuseholders, having a horsepower rating not less than the equivalent horsepower determined in accordance with 440.12(A)(2) shall be permitted to have an ampere rating less than 115 percent of the specified current. [440.12_(A)_(1)](https://2023.antflix.net#440.12_(A)_(1))", + "displayTitle": "(1) Ampere Rating", + "children": [], + "url": "https://2023.antflix.net#440.12_(A)_(1)" + }, + { + "body": "To determine the equivalent horsepower in complying with the requirements of 430.109, the horsepower rating shall be selected from Table 430.248, Table 430.249, or Table 430.250 corresponding to the rated-load current or branch-circuit selection current, whichever is greater, and also the horsepower rating from Table 430.251(A) or Table 430.251(B) corresponding to the locked-rotor current. In case the nameplate rated-load current or branch-circuit selection current and locked-rotor current do not correspond to the currents shown in Table 430.248, Table 430.249, Table 430.250, Table 430.251(A), or Table 430.251(B), the horsepower rating corresponding to the next higher value shall be selected. In case different horsepower ratings are obtained when applying these tables, a horsepower rating at least equal to the larger of the values obtained shall be selected. [440.12_(A)_(2)](https://2023.antflix.net#440.12_(A)_(2))", + "displayTitle": "(2) Equivalent Horsepower", + "children": [], + "url": "https://2023.antflix.net#440.12_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#440.12_(A)" + }, + { + "body": "Where the combined load of two or more hermetic refrigerant motor-compressors or one or more hermetic refrigerant motor-compressor with other motors or loads may be simultaneous on a single disconnecting means, the rating for the disconnecting means shall be determined in accordance with 440.12(B)(1) and (B)(2). [440.12_(B)](https://2023.antflix.net#440.12_(B))", + "displayTitle": "(B) Combination Loads", + "children": [ + { + "body": "The horsepower rating of the disconnecting means shall be determined from the sum of all currents, including resistance loads, at the rated-load condition and also at the locked-rotor condition. The combined rated-load current and the combined locked-rotor current so obtained shall be considered as a single motor for the purpose of this requirement as required by 440.12(B)(1)(a) and (B)(1)(b). The full-load current equivalent to the horsepower rating of each motor, other than a hermetic refrigerant motor-compressor, and fan or blower motors as covered in 440.6(B) shall be selected from Table 430.248, Table 430.249, or Table 430.250. These full-load currents shall be added to the motor-compressor rated-load current(s) or branch-circuit selection current(s), whichever is greater, and to the rating in amperes of other loads to obtain an equivalent full-load current for the combined load.The locked-rotor current equivalent to the horsepower rating of each motor, other than a hermetic refrigerant motor-compressor, shall be selected from Table 430.251(A) or Table 430.251(B), and, for fan and blower motors of the shaded-pole or permanent split-capacitor type marked with the locked-rotor current, the marked value shall be used. The locked-rotor currents shall be added to the motor-compressor locked-rotor current(s) and to the rating in amperes of other loads to obtain an equivalent locked-rotor current for the combined load. Where two or more motors or other loads such as resistance heaters, or both, cannot be started simultaneously, appropriate combinations of locked-rotor and rated-load current or branch-circuit selection current, whichever is greater, shall be an acceptable means of determining the equivalent locked-rotor current for the simultaneous combined load.Exception: Where part of the concurrent load is a resistance load and the disconnecting means is a switch rated in horsepower and amperes, the switch used shall be permitted to have a horsepower rating not less than the combined load to the motor-compressor(s) and other motor(s) at the locked-rotor condition, if the ampere rating of the switch is not less than this locked-rotor load plus the resistance load. [440.12_(B)_(1)](https://2023.antflix.net#440.12_(B)_(1))", + "displayTitle": "(1) Horsepower Rating", + "children": [], + "url": "https://2023.antflix.net#440.12_(B)_(1)" + }, + { + "body": "The ampere rating of the disconnecting means shall be at least 115 percent of the sum of all currents at the rated-load condition determined in accordance with 440.12(B)(1). Exception: A listed unfused motor circuit switch, without fuseholders, having a horsepower rating not less than the equivalent horsepower determined by 440.12(B)(1) shall be permitted to have an ampere rating less than 115 percent of the sum of all currents. [440.12_(B)_(2)](https://2023.antflix.net#440.12_(B)_(2))", + "displayTitle": "(2) Full-Load Current Equivalent", + "children": [], + "url": "https://2023.antflix.net#440.12_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#440.12_(B)" + }, + { + "body": "For small motor-compressors not having the locked-rotor current marked on the nameplate, or for small motors not covered by Table 430.247, Table 430.248, Table 430.249, or Table 430.250, the locked-rotor current shall be assumed to be six times the rated-load current. [440.12_(C)](https://2023.antflix.net#440.12_(C))", + "displayTitle": "(C) Small Motor-Compressors", + "children": [], + "url": "https://2023.antflix.net#440.12_(C)" + }, + { + "body": "Every disconnecting means in the refrigerant motor-compressor circuit between the point of attachment to the feeder and the point of connection to the refrigerant motor-compressor shall comply with the requirements of 440.12. [440.12_(D)](https://2023.antflix.net#440.12_(D))", + "displayTitle": "(D) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#440.12_(D)" + }, + { + "body": "Where the rated-load or locked-rotor current as determined above would indicate a disconnecting means rated in excess of 100 hp, 430.109(E) shall apply. [440.12_(E)](https://2023.antflix.net#440.12_(E))", + "displayTitle": "(E) Disconnecting Means Rated in Excess of 100 Horsepower", + "children": [], + "url": "https://2023.antflix.net#440.12_(E)" + } + ], + "url": "https://2023.antflix.net#440.12" + }, + { + "body": "For cord-connected equipment such as room air conditioners, household refrigerators and freezers, drinking water coolers, and beverage dispensers, a separable connector or an attachment plug and receptacle shall be permitted to serve as the disconnecting means. Informational Note: See 440.63 for room air conditioners. [440.13](https://2023.antflix.net#440.13)", + "displayTitle": "440.13 Cord-Connected Equipment", + "children": [], + "url": "https://2023.antflix.net#440.13" + }, + { + "body": "Disconnecting means shall be located within sight from, and readily accessible from, the air-conditioning or refrigerating equipment. The disconnecting means shall be permitted to be installed on or within the air-conditioning or refrigerating equipment. Disconnecting means shall meet the working space requirements of 110.26(A). The disconnecting means shall not be located on panels that are designed to allow access to the air-conditioning or refrigeration equipment or where it obscures the equipment nameplate(s). Exception No. 1: Where the disconnecting means provided in accordance with 430.102(A) is lockable in accordance with 110.25 and the refrigerating or air-conditioning equipment is essential to an industrial process in a facility with written safety procedures, and where the conditions of maintenance and supervision ensure that only qualified persons service the equipment, a disconnecting means within sight from the equipment shall not be required. Exception No. 2: Where an attachment plug and receptacle serve as the disconnecting means in accordance with 440.13, their location shall be accessible but shall not be required to be readily accessible. Informational Note: See Parts VII and IX of Article 430 for additional requirements. [440.14](https://2023.antflix.net#440.14)", + "displayTitle": "440.14 Location", + "children": [], + "url": "https://2023.antflix.net#440.14" + }, + { + "displayTitle": "Part III Branch-Circuit Short-Circuit and Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#divider_59_III" + }, + { + "body": "Part III specifies devices intended to protect the branch-circuit conductors, control apparatus, and motors in circuits supplying hermetic refrigerant motor-compressors against overcurrent due to short circuits and ground faults. They are in addition to or amendatory of the overcurrent protection requirements found elsewhere in this Code. [440.21](https://2023.antflix.net#440.21)", + "displayTitle": "440.21 General", + "children": [], + "url": "https://2023.antflix.net#440.21" + }, + { + "displayTitle": "440.22 Application and Selection", + "children": [ + { + "body": "The motor-compressor branch-circuit short-circuit and ground-fault protective device shall be capable of carrying the starting current of the motor. A protective device having a rating or setting not exceeding 175 percent of the motor-compressor rated-load current or branch-circuit selection current, whichever is greater, shall be permitted. Exception No. 1: If the values for branch-circuit short-circuit and ground-fault protection in accordance with 440.22(A) do not correspond to the standard sizes or ratings of fuses, nonadjustable circuit breakers, thermal protective devices, or available settings of adjustable circuit breakers, a higher size, rating, or available setting that does not exceed the next higher standard ampere rating shall be permitted. Exception No. 2: If the values for branch-circuit short-circuit and ground-fault protection in accordance with 440.22(A) or the rating modified by Exception No. 1 is not sufficient for the starting current of the motor, the rating or setting shall be permitted to be increased but shall not exceed 225 percent of the motor rated-load current or branch-circuit selection current, whichever is greater. Exception No. 3: The rating of the branch-circuit short-circuit and ground-fault protective device shall not be required to be less than 15 amperes. [440.22_(A)](https://2023.antflix.net#440.22_(A))", + "displayTitle": "(A) Rating or Setting for Individual Motor-Compressor", + "children": [], + "url": "https://2023.antflix.net#440.22_(A)" + }, + { + "body": "The equipment branch-circuit short-circuit and ground-fault protective device shall be capable of carrying the starting current of the equipment. Where the hermetic refrigerant motor-compressor is the only load on the circuit, the protection shall comply with 440.22(A). Where the equipment incorporates more than one hermetic refrigerant motor-compressor or a hermetic refrigerant motor-compressor and other motors or other loads, the equipment short-circuit and ground-fault protection shall comply with 430.53 and 440.22(B)(1) and (B)(2). [440.22_(B)](https://2023.antflix.net#440.22_(B))", + "displayTitle": "(B) Rating or Setting for Equipment", + "children": [ + { + "body": "Where a hermetic refrigerant motor-compressor is the largest load connected to the circuit, the rating or setting of the branch-circuit short-circuit and ground-fault protective device shall not exceed the value specified in 440.22(A) for the largest motor-compressor plus the sum of the rated-load current or branch-circuit selection current, whichever is greater, of the other motor-compressor(s) and the ratings of the other loads supplied. [440.22_(B)_(1)](https://2023.antflix.net#440.22_(B)_(1))", + "displayTitle": "(1) Motor-Compressor Largest Load", + "children": [], + "url": "https://2023.antflix.net#440.22_(B)_(1)" + }, + { + "body": "Where a hermetic refrigerant motor-compressor is not the largest load connected to the circuit, the rating or setting of the branch-circuit short-circuit and ground-fault protective device shall not exceed a value equal to the sum of the rated-load current or branch-circuit selection current, whichever is greater, rating(s) for the motor-compressor(s) plus the value specified in 430.53(C)(4) where other motor loads are supplied, or the value specified in 240.4 where only nonmotor loads are supplied in addition to the motor-compressor(s). Exception No. 1: Equipment that starts and operates on a 15- or 20-ampere 120-volt, or 15-ampere 208- or 240-volt single-phase branch circuit, shall be permitted to be protected by the 15- or 20-ampere over-current device protecting the branch circuit, but if the maximum branch-circuit short-circuit and ground-fault protective device rating marked on the equipment is less than these values, the circuit protective device shall not exceed the value marked on the equipment nameplate. Exception No. 2: The nameplate marking of cord-and-plug-connected equipment rated not greater than 250 volts, single-phase, such as household refrigerators and freezers, drinking water coolers, and beverage dispensers, shall be used in determining the branch-circuit requirements, and each unit shall be considered as a single motor unless the nameplate is marked otherwise. [440.22_(B)_(2)](https://2023.antflix.net#440.22_(B)_(2))", + "displayTitle": "(2) Motor-Compressor Not Largest Load", + "children": [], + "url": "https://2023.antflix.net#440.22_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#440.22_(B)" + }, + { + "body": "Where maximum protective device ratings shown on a manufacturer's overload relay table for use with a motor controller are less than the rating or setting selected in accordance with 440.22(A) and (B), the protective device rating shall not exceed the manufacturer's values marked on the equipment. [440.22_(C)](https://2023.antflix.net#440.22_(C))", + "displayTitle": "(C) Protective Device Rating Not to Exceed the Manufacturer's Values", + "children": [], + "url": "https://2023.antflix.net#440.22_(C)" + } + ], + "url": "https://2023.antflix.net#440.22" + }, + { + "displayTitle": "Part IV Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#divider_18_IV" + }, + { + "body": "Part IV and adjustments made in accordance with Part III of Article 310 specify ampacities of conductors required to carry the motor current without overheating under the conditions specified, except as modified in 440.6(A), Exception No. 1. These articles shall not apply to integral conductors of motors, to motor controllers and the like, or to conductors that form an integral part of approved equipment. [440.31](https://2023.antflix.net#440.31)", + "displayTitle": "440.31 General", + "children": [], + "url": "https://2023.antflix.net#440.31" + }, + { + "body": "Branch-circuit conductors supplying a single motor-compressor shall have an ampacity not less than the greater of the following: 125 percent of the motor-compressor rated-load current125 percent of the branch-circuit selection currentFor a wye-start, delta-run connected motor-compressor, the selection of branch-circuit conductors between the motor controller and the motor-compressor shall be permitted to be based on 72 percent of either the motor-compressor rated-load current or the branch-circuit selection current, whichever is greater.Informational Note: The multiplier of 72 percent is obtained by multiplying 58 percent by 1.25 because the individual motor circuit conductors of wye-start, delta-run connected motor-compressors carry 58 percent of the rated-load current. [440.32](https://2023.antflix.net#440.32)", + "displayTitle": "440.32 Single Motor-Compressor", + "children": [], + "url": "https://2023.antflix.net#440.32" + }, + { + "body": "Conductors supplying one or more motor-compressor(s) with or without an additional motor load(s) shall have an ampacity not less than the sum of each of the following: The sum of the rated-load or branch-circuit selection current, whichever is greater, of all motor-compressor(s)The sum of the full-load current rating of all other motors25 percent of the highest motor-compressor or motor full load current in the groupException No. 1: Where the circuitry is interlocked so as to prevent the starting and running of a second motor-compressor or group of motor-compressors, the conductor size shall be determined from the largest motor-compressor or group of motor-compressors that is to be operated at a given time.Exception No. 2: The branch-circuit conductors for room air conditioners shall be in accordance with Part VII of Article 440. [440.33](https://2023.antflix.net#440.33)", + "displayTitle": "440.33 Motor-Compressor(s) With or Without Additional Motor Loads", + "children": [], + "url": "https://2023.antflix.net#440.33" + }, + { + "body": "Conductors supplying a motor-compressor load(s) in addition to other load(s) shall have an ampacity sufficient for the other load(s) plus the required ampacity for the motor-compressor load(s).The motor compressor load(s) shall be determined in accordance with 440.32 or 440.33. The other load(s) shall be calculated from branch-circuit, feeder, and service load calculations. Exception: Where the circuitry is interlocked to prevent simultaneous operation of the motor-compressor(s) and all other loads connected, the conductor size shall be determined from the largest size required for the motor-compressor(s) and other loads to be operated at a given time. [440.34](https://2023.antflix.net#440.34)", + "displayTitle": "440.34 Combination Load", + "children": [], + "url": "https://2023.antflix.net#440.34" + }, + { + "body": "The ampacity of the conductors supplying multimotor and combination-load equipment shall not be less than the minimum circuit ampacity marked on the equipment in accordance with 440.4(B). [440.35](https://2023.antflix.net#440.35)", + "displayTitle": "440.35 Multimotor and Combination-Load Equipment", + "children": [], + "url": "https://2023.antflix.net#440.35" + }, + { + "displayTitle": "Part V Controllers for Motor-Compressors", + "children": [], + "url": "https://2023.antflix.net#divider_13_V" + }, + { + "displayTitle": "440.41 Rating", + "children": [ + { + "body": "A motor-compressor controller shall have both a continuous-duty full-load current rating and a locked-rotor current rating not less than the name-plate rated-load current or branch-circuit selection current, whichever is greater, and locked-rotor current, respectively, of the compressor. In case the motor controller is rated in horsepower but is without one or both of the foregoing current ratings, equivalent currents shall be determined from the ratings as follows. Table 430.248, Table 430.249, and Table 430.250 shall be used to determine the equivalent full-load current rating. Table 430.251(A) and Table 430.251(B) shall be used to determine the equivalent locked-rotor current ratings. [440.41_(A)](https://2023.antflix.net#440.41_(A))", + "displayTitle": "(A) Motor-Compressor Controller", + "children": [], + "url": "https://2023.antflix.net#440.41_(A)" + }, + { + "body": "A controller serving more than one motor-compressor or a motor-compressor and other loads shall have a continuous-duty full-load current rating and a locked-rotor current rating not less than the combined load as determined in accordance with 440.12(B). [440.41_(B)](https://2023.antflix.net#440.41_(B))", + "displayTitle": "(B) Controller Serving More Than One Load", + "children": [], + "url": "https://2023.antflix.net#440.41_(B)" + } + ], + "url": "https://2023.antflix.net#440.41" + }, + { + "displayTitle": "Part VI Motor-Compressor and Branch-Circuit Overload Protection", + "children": [], + "url": "https://2023.antflix.net#divider_10_VI" + }, + { + "body": "Part VI specifies devices intended to protect the motor-compressor, the motor-control apparatus, and the branch-circuit conductors against excessive heating due to motor overload and failure to start. Informational Note: See 240.4(G) for application of Parts III and VI of Article 440. [440.51](https://2023.antflix.net#440.51)", + "displayTitle": "440.51 General", + "children": [], + "url": "https://2023.antflix.net#440.51" + }, + { + "displayTitle": "440.52 Application and Selection", + "children": [ + { + "body": "Each motor-compressor shall be protected against overload and failure to start by one of the following means: A separate overload relay that is responsive to motor-compressor current. This device shall be selected to trip at not more than 140 percent of the motor-compressor rated-load current.A thermal protector integral with the motor-compressor, approved for use with the motor-compressor that it protects on the basis that it will prevent dangerous overheating of the motor-compressor due to overload and failure to start. If the current-interrupting device is separate from the motor-compressor and its control circuit is operated by a protective device integral with the motor-compressor, it shall be arranged so that the opening of the control circuit will result in interruption of current to the motor-compressor.A fuse or inverse time circuit breaker responsive to motor current, which shall also be permitted to serve as the branch-circuit short-circuit and ground-fault protective device. This device shall be rated at not more than 125 percent of the motor-compressor rated-load current. It shall have sufficient time delay to permit the motor-compressor to start and accelerate its load. The equipment or the motor-compressor shall be marked with this maximum branch-circuit fuse or inverse time circuit breaker rating.A protective system, furnished or specified and approved for use with the motor-compressor that it protects on the basis that it will prevent dangerous overheating of the motor-compressor due to overload and failure to start. If the current-interrupting device is separate from the motor-compressor and its control circuit is operated by a protective device that is not integral with the current-interrupting device, it shall be arranged so that the opening of the control circuit will result in interruption of current to the motor-compressor. [440.52_(A)](https://2023.antflix.net#440.52_(A))", + "displayTitle": "(A) Protection of Motor-Compressor", + "children": [], + "url": "https://2023.antflix.net#440.52_(A)" + }, + { + "body": "The motor-compressor controller(s), the disconnecting means, and the branch-circuit conductors shall be protected against overcurrent due to motor overload and failure to start by one of the following means, which shall be permitted to be the same device or system protecting the motor-compressor in accordance with 440.52(A):\nException: Overload protection of motor-compressors and equipment on 15- and 20-ampere, single-phase, branch circuits shall be permitted to be in accordance with 440.54 and 440.55.\n\nAn overload relay selected in accordance with 440.52(A)(1)\nA thermal protector applied in accordance with 440.52(A)(2), that will not permit a continuous current in excess of 156 percent of the marked rated-load current or branch-circuit selection current\nA fuse or inverse time circuit breaker selected in accordance with 440.52(A)(3)\nA protective system, in accordance with 440.52(A)(4), that will not permit a continuous current in excess of 156 percent of the marked rated-load current or branch-circuit selection current\n [440.52_(B)](https://2023.antflix.net#440.52_(B))", + "displayTitle": "(B) Protection of Motor-Compressor Control Apparatus and Branch-Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#440.52_(B)" + } + ], + "url": "https://2023.antflix.net#440.52" + }, + { + "body": "Overload relays and other devices for motor overload protection that are not capable of opening short circuits shall be protected by fuses or inverse time circuit breakers with ratings or settings in accordance with Part III unless identified for group installation or for part-winding motors and marked to indicate the maximum size of fuse or inverse time circuit breaker by which they shall be protected. Exception: The fuse or inverse time circuit breaker size marking shall be permitted on the nameplate of the equipment in which the overload relay or other overload device is used. [440.53](https://2023.antflix.net#440.53)", + "displayTitle": "440.53 Overload Relays", + "children": [], + "url": "https://2023.antflix.net#440.53" + }, + { + "body": "Overload protection for motor-compressors and equipment used on 15- or 20-ampere 120-volt, or 15-ampere 208- or 240-volt, single-phase branch circuits shall be permitted in accordance with 440.54(A) and (B). [440.54](https://2023.antflix.net#440.54)", + "displayTitle": "440.54 Motor-Compressors and Equipment on 15- or 20-Ampere Branch Circuits - Not Cord- And Attachment-Plug-Connected", + "children": [ + { + "body": "The motor-compressor shall be provided with overload protection selected as specified in 440.52(A). Both the controller and motor overload protective device shall be identified for installation with the short-circuit and ground-fault protective device for the branch circuit to which the equipment is connected. [440.54_(A)](https://2023.antflix.net#440.54_(A))", + "displayTitle": "(A) Overload Protection", + "children": [], + "url": "https://2023.antflix.net#440.54_(A)" + }, + { + "body": "The short-circuit and ground-fault protective device protecting the branch circuit shall have sufficient time delay to permit the motor-compressor and other motors to start and accelerate their loads. [440.54_(B)](https://2023.antflix.net#440.54_(B))", + "displayTitle": "(B) Time Delay", + "children": [], + "url": "https://2023.antflix.net#440.54_(B)" + } + ], + "url": "https://2023.antflix.net#440.54" + }, + { + "body": "Overload protection for motor-compressors and equipment that are cord- and attachment-plug-connected and used on 15- or 20-ampere 120-volt, or 15-ampere 208- or 240-volt, single-phase branch circuits shall be permitted in accordance with 440.55(A), (B), and (C). [440.55](https://2023.antflix.net#440.55)", + "displayTitle": "440.55 Cord- And Attachment-Plug-Connected Motor-Compressors and Equipment on 15- or 20-Ampere Branch Circuits", + "children": [ + { + "body": "The motor-compressor shall be provided with overload protection as specified in 440.52(A). Both the controller and the motor overload protective device shall be identified for installation with the short-circuit and ground-fault protective device for the branch circuit to which the equipment is connected. [440.55_(A)](https://2023.antflix.net#440.55_(A))", + "displayTitle": "(A) Overload Protection", + "children": [], + "url": "https://2023.antflix.net#440.55_(A)" + }, + { + "body": "The rating of the attachment plug and receptacle or cord connector shall not exceed 20 amperes at 125 volts or 15 amperes at 250 volts. [440.55_(B)](https://2023.antflix.net#440.55_(B))", + "displayTitle": "(B) Attachment Plug and Receptacle or Cord Connector Rating", + "children": [], + "url": "https://2023.antflix.net#440.55_(B)" + }, + { + "body": "The short-circuit and ground-fault protective device protecting the branch circuit shall have sufficient time delay to permit the motor-compressor and other motors to start and accelerate their loads. [440.55_(C)](https://2023.antflix.net#440.55_(C))", + "displayTitle": "(C) Time Delay", + "children": [], + "url": "https://2023.antflix.net#440.55_(C)" + } + ], + "url": "https://2023.antflix.net#440.55" + }, + { + "displayTitle": "Part VII Room Air Conditioners", + "children": [], + "url": "https://2023.antflix.net#divider_9_VII" + }, + { + "body": "Part VII shall apply to electrically energized room air conditioners that control temperature and humidity. For the purpose of Part VII, a room air conditioner (with or without provisions for heating) shall be considered as an ac appliance of the air-cooled window, console, or in-wall type that is installed in the conditioned room and that incorporates a hermetic refrigerant motor-compressor(s). Part VII covers equipment rated not over 250 volts, single phase, and the equipment shall be permitted to be cord- and attachment-plug-connected. A room air conditioner that is rated 3-phase or rated over 250 volts shall be directly connected to a wiring method recognized in Chapter 3, and Part VII shall not apply. [440.60](https://2023.antflix.net#440.60)", + "displayTitle": "440.60 General", + "children": [], + "url": "https://2023.antflix.net#440.60" + }, + { + "body": "The enclosures of room air conditioners shall be connected to the equipment grounding conductor in accordance with 250.110, 250.112, and 250.114. [440.61](https://2023.antflix.net#440.61)", + "displayTitle": "440.61 Grounding", + "children": [], + "url": "https://2023.antflix.net#440.61" + }, + { + "displayTitle": "440.62 Branch-Circuit Requirements", + "children": [ + { + "body": "A room air conditioner shall be considered as a single motor unit in determining its branch-circuit requirements where all the following conditions are met: It is cord- and attachment-plug-connected.Its rating is not more than 40 amperes and 250 volts, single phase.Total rated-load current is shown on the room airconditioner nameplate rather than individual motor currents.The rating of the branch-circuit short-circuit and ground-fault protective device does not exceed the ampacity of the branch-circuit conductors or the rating of the receptacle, whichever is less. [440.62_(A)](https://2023.antflix.net#440.62_(A))", + "displayTitle": "(A) Room Air Conditioner as a Single Motor Unit", + "children": [], + "url": "https://2023.antflix.net#440.62_(A)" + }, + { + "body": "The total marked current rating of a cord- and attachment-plug-connected room air conditioner shall not exceed 80 percent of the current rating of a branch circuit where no other loads are supplied. [440.62_(B)](https://2023.antflix.net#440.62_(B))", + "displayTitle": "(B) Where No Other Loads Are Supplied", + "children": [], + "url": "https://2023.antflix.net#440.62_(B)" + }, + { + "body": "The total marked current rating of a cord- and attachment-plug-connected room air conditioner shall not exceed 50 percent of the current rating of a branch circuit where lighting outlets, other appliances, or general-use receptacles are also supplied. Where the circuitry is interlocked to prevent simultaneous operation of the room air conditioner and energization of other outlets on the same branch circuit, a cord- and attachment-plug-connected room air conditioner shall not exceed 80 percent of the branch-circuit current rating. [440.62_(C)](https://2023.antflix.net#440.62_(C))", + "displayTitle": "(C) Where Lighting Units or Other Appliances Are Also Supplied", + "children": [], + "url": "https://2023.antflix.net#440.62_(C)" + } + ], + "url": "https://2023.antflix.net#440.62" + }, + { + "body": "An attachment plug and receptacle or cord connector shall be permitted to serve as the disconnecting means for a single-phase room air conditioner rated 250 volts or less if (1) the manual controls on the room air conditioner are readily accessible and located within 1.8 m (6 ft) of the floor, or (2) an approved manually operable disconnecting means is installed in a readily accessible location within sight from the room air conditioner. [440.63](https://2023.antflix.net#440.63)", + "displayTitle": "440.63 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#440.63" + }, + { + "body": "Where a flexible cord is used to supply a room air conditioner, the length of such cord shall not exceed 3.0 m (10 ft) for a nominal, 120-volt rating or 1.8 m (6 ft) for a nominal, 208- or 240-volt rating. [440.64](https://2023.antflix.net#440.64)", + "displayTitle": "440.64 Supply Cords", + "children": [], + "url": "https://2023.antflix.net#440.64" + }, + { + "body": "Single-phase cord- and plug-connected room air conditioners shall be provided with one of the following factory-installed devices: Leakage-current detector-interrupter (LCDI)Arc-fault circuit interrupter (AFCI)Heat detecting circuit interrupter (HDCI)The protection device shall be an integral part of the attachment plug or be located in the power supply cord within 300 mm (12 in.) of the attachment plug. [440.65](https://2023.antflix.net#440.65)", + "displayTitle": "440.65 Protection Devices", + "children": [], + "url": "https://2023.antflix.net#440.65" + } + ], + "url": "https://2023.antflix.net#440" + }, + { + "displayTitle": "Article 445 Generators", + "children": [ + { + "body": "This article contains installation and other requirements for generators. [445.1](https://2023.antflix.net#445.1)", + "displayTitle": "445.1 Scope", + "children": [], + "url": "https://2023.antflix.net#445.1" + }, + { + "body": "Stationary generators shall be listed. Exception: One of a kind or custom manufactured generators shall be permitted to be field labeled. Informational Note: See UL 2200, Standard for Stationary Engine Generator Assemblies, for additional information. [445.6](https://2023.antflix.net#445.6)", + "displayTitle": "445.6 Listing", + "children": [], + "url": "https://2023.antflix.net#445.6" + }, + { + "body": "Generators shall be of a type suitable for the locations in which they are installed. They shall also meet the requirements for motors in 430.14. Informational Note: See NFPA 37-2021, Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines, for information on the location of generators. [445.10](https://2023.antflix.net#445.10)", + "displayTitle": "445.10 Location", + "children": [], + "url": "https://2023.antflix.net#445.10" + }, + { + "body": "Each generator shall be provided with an accessible nameplate giving the manufacturer's name, the rated frequency, the number of phases if ac, the rating in kilowatts or kilovolt-amperes, the power factor, the normal volts and amperes corresponding to the rating, and the rated ambient temperature. Nameplates or manufacturer's instructions shall provide the following information for all stationary generators and portable generators rated more than 15 kW:Alternator subtransient, transient, synchronous, and zero sequence reactancesGenerator set power rating category (including but not limited to prime, standby, or continuous)Alternator temperature rise at rated load and insulation system classIndication if the generator is protected against overload by inherent design, an overcurrent protective relay, a circuit breaker, or a fuseAvailable fault current for inverter-based generators, in lieu of the synchronous, subtransient, and transient reactancesMarking shall be provided by the manufacturer to indicate whether or not the generator neutral is bonded to its frame. Where the bonding is modified in the field, additional marking shall be required to indicate whether the neutral is bonded to the frame. [445.11](https://2023.antflix.net#445.11)", + "displayTitle": "445.11 Marking", + "children": [], + "url": "https://2023.antflix.net#445.11" + }, + { + "displayTitle": "445.12 Overcurrent Protection", + "children": [ + { + "body": "Constant-voltage generators, except ac generator exciters, shall be protected from overload by inherent design, circuit breakers, fuses, protective relays, or other identified overcurrent protective means suitable for the conditions of use. [445.12_(A)](https://2023.antflix.net#445.12_(A))", + "displayTitle": "(A) Constant-Voltage Generators", + "children": [], + "url": "https://2023.antflix.net#445.12_(A)" + }, + { + "body": "Two-wire, dc generators shall be permitted to have overcurrent protection in one conductor only if the overcurrent device is actuated by the entire current generated other than the current in the shunt field. The over-current device shall not open the shunt field. [445.12_(B)](https://2023.antflix.net#445.12_(B))", + "displayTitle": "(B) Two-Wire Generators", + "children": [], + "url": "https://2023.antflix.net#445.12_(B)" + }, + { + "body": "Generators operating at 65 volts or less and driven by individual motors shall be considered as protected by the overcurrent device protecting the motor if these devices will operate when the generators are delivering not more than 150 percent of their full-load rated current. [445.12_(C)](https://2023.antflix.net#445.12_(C))", + "displayTitle": "(C) 65 Volts or Less", + "children": [], + "url": "https://2023.antflix.net#445.12_(C)" + }, + { + "body": "Two-wire, dc generators used in conjunction with balancer sets to obtain neutral points for 3-wire systems shall be equipped with overcurrent devices that disconnect the 3-wire system in case of excessive unbalancing of voltages or currents. [445.12_(D)](https://2023.antflix.net#445.12_(D))", + "displayTitle": "(D) Balancer Sets", + "children": [], + "url": "https://2023.antflix.net#445.12_(D)" + }, + { + "body": "Three-wire, dc generators, whether compound or shunt wound, shall be equipped with overcurrent devices, one in each armature lead, and connected so as to be actuated by the entire current from the armature. Such overcurrent devices shall consist either of a double-pole, double-coil circuit breaker or of a 4-pole circuit breaker connected in the main and equalizer leads and tripped by two overcurrent devices, one in each armature lead. Such protective devices shall be interlocked so that no one pole can be opened without simultaneously disconnecting both leads of the armature from the system. Exception to (A) through (E): Where deemed by the authority having jurisdiction that a generator is vital to the operation of an electrical system and the generator should operate to failure to prevent a greater hazard to persons, the overload sensing device(s) shall be permitted to be connected to an annunciator or alarm supervised by authorized personnel instead of interrupting the generator circuit. [445.12_(E)](https://2023.antflix.net#445.12_(E))", + "displayTitle": "(E) Three-Wire, Direct-Current Generators", + "children": [], + "url": "https://2023.antflix.net#445.12_(E)" + } + ], + "url": "https://2023.antflix.net#445.12" + }, + { + "displayTitle": "445.13 Ampacity of Conductors", + "children": [ + { + "body": "The ampacity of the conductors from the generator output terminals to the first distribution device(s) containing overcurrent protection shall not be less than 115 percent of the nameplate current rating of the generator. It shall be permitted to size the neutral conductors in accordance with 220.61. Conductors that must carry ground-fault currents shall not be smaller than required by 250.30(A). Neutral conductors of dc generators that must carry ground-fault currents shall not be smaller than the minimum required size of the largest conductor. Exception: Where the design and operation of the generator prevent overloading, the ampacity of the conductors shall not be less than 100 percent of the nameplate current rating of the generator. [445.13_(A)](https://2023.antflix.net#445.13_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#445.13_(A)" + }, + { + "body": "Where the generator set is equipped with a listed overcurrent protective device or a combination of a current transformer and overcurrent relay, conductors shall be permitted to be tapped from the load side of the protected terminals in accordance with 240.21 (B). Tapped conductors shall not be permitted for portable generators rated 15 kW or less where field wiring connection terminals are not accessible. [445.13_(B)](https://2023.antflix.net#445.13_(B))", + "displayTitle": "(B) Overcurrent Protection Provided", + "children": [], + "url": "https://2023.antflix.net#445.13_(B)" + } + ], + "url": "https://2023.antflix.net#445.13" + }, + { + "body": "Live parts of generators operated at more than 50 volts ac or 60 volts dc to ground shall not be exposed to accidental contact where accessible to unqualified persons. [445.14](https://2023.antflix.net#445.14)", + "displayTitle": "445.14 Protection of Live Parts", + "children": [], + "url": "https://2023.antflix.net#445.14" + }, + { + "body": "Where necessary for the safety of attendants, the requirements of 430.233 shall apply. [445.15](https://2023.antflix.net#445.15)", + "displayTitle": "445.15 Guards for Attendants", + "children": [], + "url": "https://2023.antflix.net#445.15" + }, + { + "body": "Where field-installed wiring passes through an opening in an enclosure, a conduit box, or a barrier, a bushing shall be used to protect the conductors from the edges of an opening having sharp edges. The bushing shall have smooth, well-rounded surfaces where it may be in contact with the conductors. If used where oils, grease, or other contaminants may be present, the bushing shall be made of a material not deleteriously affected. [445.16](https://2023.antflix.net#445.16)", + "displayTitle": "445.16 Bushings", + "children": [], + "url": "https://2023.antflix.net#445.16" + }, + { + "body": "Generator terminal housings shall comply with 430.12. Where a horsepower rating is required to determine the required minimum size of the generator terminal housing, the full-load current of the generator shall be compared with comparable motors in Table 430.247 through Table 430.250. The higher horsepower rating of Table 430.247 and Table 430.250 shall be used whenever the generator selection is between two ratings. Exception: This section shall not apply to generators rated over 600 volts. [445.17](https://2023.antflix.net#445.17)", + "displayTitle": "445.17 Generator Terminal Housings", + "children": [], + "url": "https://2023.antflix.net#445.17" + }, + { + "displayTitle": "445.18 Disconnecting Means", + "children": [ + { + "body": "Generators other than cord-and-plug-connected portable generators shall have one or more disconnecting means. Each disconnecting means shall simultaneously open all associated ungrounded conductors. Each disconnecting means shall be lockable open in accordance with 110.25. The disconnecting means shall be permitted to be located within the generator behind a hinged cover, door, or enclosure panel. Where the generator disconnecting means is located within the generator, a field applied label meeting the requirements of 110.21(B) shall be provided indicating the location of the generator disconnecting means. [445.18_(A)](https://2023.antflix.net#445.18_(A))", + "displayTitle": "(A) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#445.18_(A)" + }, + { + "body": "Where a generator is installed in parallel with other generators, the provisions of 445.18(A) shall be capable of isolating the generator output terminals from the paralleling system bus. The disconnecting means shall not be required to be located at the generator. [445.18_(B)](https://2023.antflix.net#445.18_(B))", + "displayTitle": "(B) Generators Installed in Parallel", + "children": [], + "url": "https://2023.antflix.net#445.18_(B)" + } + ], + "url": "https://2023.antflix.net#445.18" + }, + { + "displayTitle": "445.19 Emergency Shutdown of Prime Mover", + "children": [ + { + "body": "Generators shall have provisions to shut down the prime mover. The means of shutdown shall comply with all of the following: Be equipped with provisions to disable all prime mover start control circuits to render the prime mover incapable of startingInitiate a shutdown mechanism that requires a mechanical resetThe provisions to shut down the prime mover shall be permitted to satisfy the requirements of 445.18(A) where it is capable of being locked in the open position in accordance with 110.25. [445.19_(A)](https://2023.antflix.net#445.19_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#445.19_(A)" + }, + { + "body": "For other than one- and two-family dwelling units, generators with greater than 15 kW rating shall be provided with a remote emergency stop switch to shut down the prime mover. The remote emergency stop switch shall be located outside the equipment room or generator enclosure at a readily accessible location and shall also meet the requirements of 445.19(A)(1) and (A)(2). The remote emergency stop switch shall be permitted to be mounted on the exterior of the generator enclosure. The remote emergency stop switch shall be labeled Generator Emergency Shutdown, and the label shall meet the requirements of 110.21 (B). [445.19_(B)](https://2023.antflix.net#445.19_(B))", + "displayTitle": "(B) Remote Emergency Shutdown", + "children": [], + "url": "https://2023.antflix.net#445.19_(B)" + }, + { + "body": "For other than cord-and-plug-connected portable generators, an emergency shutdown device shall be located outside the dwelling unit at a readily accessible location and shall also meet the requirements of 445.19(A)(1) and (A)(2). An emergency shutdown device mounted on the exterior of the generator enclosure shall be permitted to satisfy the requirements of this section. The shutdown device shall be marked as the Generator Emergency Shutdown, and the label shall meet the requirements of 110.21 (B)). [445.19_(C)](https://2023.antflix.net#445.19_(C))", + "displayTitle": "(C) Emergency Shutdown in One- And Two-Family Dwelling Units", + "children": [], + "url": "https://2023.antflix.net#445.19_(C)" + } + ], + "url": "https://2023.antflix.net#445.19" + }, + { + "body": "Receptacle outlets that are a part of a 15-kW or smaller portable generator shall have listed ground-fault circuit-interrupter protection (GFCI) for personnel integral to the generator or receptacle as indicated in either 445.20(A) or (B): [445.20](https://2023.antflix.net#445.20)", + "displayTitle": "445.20 Ground-Fault Circuit-Interrupter Protection for Receptacles on 15-kW or Smaller Portable Generators", + "children": [ + { + "body": "Unbonded generators with both 125-volt and 125/250-volt receptacle outlets shall have listed GFCI protection for personnel integral to the generator or receptacle on all 125-volt, 15- and 20-ampere receptacle outlets. Exception: GFCI protection shall not be required where the 125-volt receptacle outlets(s) is interlocked such that it is not available for use when any 125/250-volt receptacle(s) is in use. [445.20_(A)](https://2023.antflix.net#445.20_(A))", + "displayTitle": "(A) Unbonded (Floating Neutral) Generators", + "children": [], + "url": "https://2023.antflix.net#445.20_(A)" + }, + { + "body": "Bonded generators shall be provided with GFCI protection on all 125-volt. 15- and 20-ampere receptacle outlets. Informational Note: See 590.6(A)(3) for GFCI requirements for 15-kW or smaller portable generators used for temporary electric power and lighting. Exception to (A) and (B): If the generator was manufactured or remanufactured prior to January 1, 2015, listed cord sets or devices incorporating listed GFCI protection for personnel identified for portable use shall be permitted. [445.20_(B)](https://2023.antflix.net#445.20_(B))", + "displayTitle": "(B) Bonded Neutral Generators", + "children": [], + "url": "https://2023.antflix.net#445.20_(B)" + } + ], + "url": "https://2023.antflix.net#445.20" + } + ], + "url": "https://2023.antflix.net#445" + }, + { + "displayTitle": "Article 450 Transformers and Transformer Vaults (Including Secondary Ties)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_68_I" + }, + { + "body": "This article covers the installation of all transformers other than the following: Current transformersDry-type transformers that constitute a component part of other apparatus and comply with the requirements for such apparatusTransformers that are an integral part of an X-ray, high-frequency, or electrostatic-coating apparatusTransformers used with Class 2 and Class 3 circuitsTransformers for sign and outline lightingTransformers for electric-discharge lightingTransformers used for power-limited fire alarm circuitsTransformers used for research, development, or testing, where effective arrangements are provided to safeguard persons from contacting energized parts [450.1](https://2023.antflix.net#450.1)", + "displayTitle": "450.1 Scope", + "children": [], + "url": "https://2023.antflix.net#450.1" + }, + { + "body": "Transformers shall individually comply with the requirements of this article unless specific provisions allow for interconnection and operation as a single unit. [450.2](https://2023.antflix.net#450.2)", + "displayTitle": "450.2 Interconnection of Transformers", + "children": [], + "url": "https://2023.antflix.net#450.2" + }, + { + "body": "Overcurrent protection of transformers shall comply with 450.3(A), (B), or (C). As used in this section, the word transformer shall mean a transformer or polyphase bank of two or more single-phase transformers operating as a unit. Informational Note No. 1: See 240.4, 240.21, 245.26, and 245.27 for overcurrent protection of conductors. Informational Note No. 2: Nonlinear loads can increase heat in a transformer without operating its overcurrent protective device. See IEEE 3002.8, Recommended Practice for Conducting Harmonic Studies and Analysis of Industrial and Commercial Power Systems, for additional information. [450.3](https://2023.antflix.net#450.3)", + "displayTitle": "450.3 Overcurrent Protection", + "children": [ + { + "body": "Overcurrent protection shall be provided in accordance with Table 450.3(A).Table 450.3(A) Maximum Rating or Setting of Overcurrent Protection for Transformers Over 1000 Volts (as a Percentage of Transformer-Rated Current)\n\n\n\nLocation Limitations\nTransformer Rated Impedance\nPrimary Protection over 1000 Volts\nSecondary Protection2\n\n\nOver 1000 Volts\n1000 Volts or Less\n\n\nCircuit Breaker4\nFuse Rating\nCircuit Breaker4\nFuse Rating\nCircuit Breaker or Fuse Rating\n\n\n\n\nAny location\nNot more than 6%\n600%1\n300%1\n300%1\n250%1\n125%1\n\n\nMore than 6% and not more than 10%\n400%1\n300%1\n250%1\n225%1\n125%1\n\n\nSupervised locations only3\nAny\n300%1\n250%1\nNot required\nNot required\nNot required\n\n\nNot more than 6%\n600%\n300%\n300%5\n250%5\n250%5\n\n\nMore than 6% and not more than 10%\n400%\n300%\n250%5\n225%5\n250%5\n\n\n\n1Where the required fuse rating or circuit breaker setting does not correspond to a standard rating or setting, a higher rating or setting that does not exceed the following shall be permitted:\n\nThe next higher standard rating or setting for fuses and circuit breakers 1000 volts and below, or\nThe next higher commercially available rating or setting for fuses and circuit breakers above 1000 volts.\n\n2Where secondary overcurrent protection is required, the secondary overcurrent device shall be permitted to consist of not more than six circuit breakers or six sets of fuses grouped in one location. Where multiple overcurrent devices are utilized, the total of all the device ratings shall not exceed the allowed value of a single overcurrent device. If both circuit breakers and fuses are used as the overcurrent device, the total of the device ratings shall not exceed that allowed for fuses.\n3A supervised location is a location where conditions of maintenance and supervision ensure that only qualified persons monitor and service the transformer installation.\n4Electronically actuated fuses that may be set to open at a specific current shall be set in accordance with settings for circuit breakers.\n5A transformer equipped with a coordinated thermal overload protection by the manufacturer shall be permitted to have separate secondary protection omitted. [450.3_(A)](https://2023.antflix.net#450.3_(A))", + "displayTitle": "(A) Transformers Over 1000 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#450.3_(A)" + }, + { + "body": "Overcurrent protection shall be provided in accordance with Table 450.3(B) unless the transformer is installed as a motor control circuit transformer in accordance with 430.72(C)(1) through (C)(5).Table 450.3(B) Maximum Rating or Setting of Overcurrent Protection for Transformers 1000 Volts and Less (as a Percentage of Transformer-Rated Current)\n\n\n\nProtection Method\nPrimary Protection\nSecondary Protection2\n\n\nCurrents of 9 Amperes or More\nCurrents Less Than 9 Amperes\nCurrents Less Than 2 Amperes\nCurrents of 9 Amperes or More\nCurrents Less Than 9 Amperes\n\n\n\n\nPrimary only protection\n125%1\n167%\n300%\nNot required\nNot required\n\n\nPrimary and secondary protection\n250%3\n250%3\n250%3\n125%1\n167%\n\n\n\n1Where 125 percent of this current does not correspond to a standard rating of a fuse or nonadjustable circuit breaker, a higher rating that does not exceed the next higher standard rating shall be permitted.\n2Where secondary overcurrent protection is required, the secondary overcurrent device shall be permitted to consist of not more than six circuit breakers or six sets of fuses grouped in one location. Where multiple overcurrent devices are utilized, the total of all the device ratings shall not exceed the allowed value of a single overcurrent device.\n3A transformer equipped with coordinated thermal overload protection by the manufacturer and arranged to interrupt the primary current shall be permitted to have primary overcurrent protection rated or set at a current value that is not more than six times the rated current of the transformer for transformers having not more than 6 percent impedance and not more than four times the rated current of the transformer for transformers having more than 6 percent but not more than 10 percent impedance. [450.3_(B)](https://2023.antflix.net#450.3_(B))", + "displayTitle": "(B) Transformers 1000 Volts, Nominal, or Less", + "children": [], + "url": "https://2023.antflix.net#450.3_(B)" + }, + { + "body": "Voltage (potential) transformers installed indoors or enclosed shall be protected with primary fuses.\nInformational Note: See 408.52 for protection of instrument circuits, including voltage transformers. [450.3_(C)](https://2023.antflix.net#450.3_(C))", + "displayTitle": "(C) Voltage (Potential) Transformers", + "children": [], + "url": "https://2023.antflix.net#450.3_(C)" + } + ], + "url": "https://2023.antflix.net#450.3" + }, + { + "displayTitle": "450.4 Autotransformers 1000 Volts, Nominal, or Less", + "children": [ + { + "body": "Each autotransformer 1000 volts, nominal, or less shall be protected by an individual overcurrent device installed in series with each ungrounded input conductor. Such overcurrent device shall be rated or set at not more than 125 percent of the rated full-load input current of the autotransformer. Where this calculation does not correspond to a standard rating of a fuse or nonadjustable circuit breaker and the rated input current is 9 amperes or more, the next higher standard rating described in 240.6 shall be permitted. An overcurrent device shall not be installed in series with the shunt winding (the winding common to both the input and the output circuits) of the autotransformer between Points A and B as shown in Figure 450.4(A). Exception: Where the rated input current of the autotransformer is less than 9 amperes, an overcurrent device rated or set at not more than 167 percent of the input current shall be permitted.\n\n\n FIGURE 450.4(A) Autotransformer. [450.4_(A)](https://2023.antflix.net#450.4_(A))", + "displayTitle": "(A) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#450.4_(A)" + }, + { + "body": "A transformer field-connected as an autotransformer shall be identified for use at elevated voltage. Informational Note: See 210.9 and 215.11 for information on permitted uses of autotransformers. [450.4_(B)](https://2023.antflix.net#450.4_(B))", + "displayTitle": "(B) Transformer Field-Connected as an Autotransformer", + "children": [], + "url": "https://2023.antflix.net#450.4_(B)" + } + ], + "url": "https://2023.antflix.net#450.4" + }, + { + "body": "Grounding autotransformers covered in this section are zigzag or T-connected transformers connected to 3-phase, 3-wire ungrounded systems for the purpose of creating a 3-phase, 4-wire distribution system or providing a neutral point for grounding purposes. Such transformers shall have a continuous per-phase current rating and a continuous neutral current rating. Zigzag-connected transformers shall not be installed on the load side of any system grounding connection, including those made in accordance with 250.24(C), 250.30(A)(1), or 250.32(B), Exception No. 1. Informational Note: The phase current in a grounding auto-transformer is one-third the neutral current. [450.5](https://2023.antflix.net#450.5)", + "displayTitle": "450.5 Grounding Autotransformers", + "children": [ + { + "body": "A grounding autotransformer used to create a 3-phase, 4-wire distribution system from a 3-phase, 3-wire ungrounded system shall conform to 450.5(A)(1) through (A)(4). [450.5_(A)](https://2023.antflix.net#450.5_(A))", + "displayTitle": "(A) Three-Phase, 4-Wire System", + "children": [ + { + "body": "The transformer shall be directly connected to the ungrounded phase conductors and shall not be switched or provided with overcurrent protection that is independent of the main switch and common-trip overcurrent protection for the 3-phase, 4-wire system. [450.5_(A)_(1)](https://2023.antflix.net#450.5_(A)_(1))", + "displayTitle": "(1) Connections", + "children": [], + "url": "https://2023.antflix.net#450.5_(A)_(1)" + }, + { + "body": "An overcurrent sensing device shall be provided that will cause the main switch or common-trip overcurrent protection referred to in 450.5(A)(1) to open if the load on the autotransformer reaches or exceeds 125 percent of its continuous current per-phase or neutral rating. Delayed tripping for temporary overcurrents sensed at the autotransformer overcurrent device shall be permitted for the purpose of allowing proper operation of branch or feeder protective devices on the 4-wire system. [450.5_(A)_(2)](https://2023.antflix.net#450.5_(A)_(2))", + "displayTitle": "(2) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#450.5_(A)_(2)" + }, + { + "body": "A fault-sensing system that causes the opening of a main switch or common-trip overcurrent device for the 3-phase, 4-wire system shall be provided to guard against single-phasing or internal faults. Informational Note: This can be accomplished by the use of two subtractive-connected donut-type current transformers installed to sense and signal when an unbalance occurs in the line current to the autotransformer of 50 percent or more of rated current. [450.5_(A)_(3)](https://2023.antflix.net#450.5_(A)_(3))", + "displayTitle": "(3) Transformer Fault Sensing", + "children": [], + "url": "https://2023.antflix.net#450.5_(A)_(3)" + }, + { + "body": "The autotransformer shall have a continuous neutral-current rating that is not less than the maximum possible neutral unbalanced load current of the 4-wire system. [450.5_(A)_(4)](https://2023.antflix.net#450.5_(A)_(4))", + "displayTitle": "(4) Rating", + "children": [], + "url": "https://2023.antflix.net#450.5_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#450.5_(A)" + }, + { + "body": "A grounding autotransformer used to make available a specified magnitude of ground-fault current for operation of a ground-responsive protective device on a 3-phase, 3-wire ungrounded system shall conform to 450.5(B)(1) and (B)(2). [450.5_(B)](https://2023.antflix.net#450.5_(B))", + "displayTitle": "(B) Ground Reference for Fault Protection Devices", + "children": [ + { + "body": "The autotransformer shall have a continuous neutral-current rating not less than the specified ground-fault current. [450.5_(B)_(1)](https://2023.antflix.net#450.5_(B)_(1))", + "displayTitle": "(1) Rating", + "children": [], + "url": "https://2023.antflix.net#450.5_(B)_(1)" + }, + { + "body": "Overcurrent protection shall comply with 450.5(B)(2) (a) and (B)(2) (b). Operation and Interrupting Rating. An overcurrent protective device having an interrupting rating in compliance with 110.9 and that will open simultaneously all ungrounded conductors when it operates shall be applied in the grounding autotransformer branch circuit.Ampere Rating. The overcurrent protection shall be rated or set at a current not exceeding 125 percent of the auto-transformer continuous per-phase current rating or 42 percent of the continuous-current rating of any series-connected devices in the autotransformer neutral connection. Delayed tripping for temporary overcurrents to permit the proper operation of ground-responsive tripping devices on the main system shall be permitted but shall not exceed values that would be more than the short-time current rating of the grounding autotransformer or any series connected devices in the neutral connection thereto.Exception: For high-impedance grounded systems covered in 250.36, where the maximum ground-fault current is designed to be not more than 10 amperes, and where the grounding autotransformer and the grounding impedance are rated for continuous duty, an overcurrent device rated not more than 20 amperes that will simultaneously open all ungrounded conductors shall be permitted to be installed on the line side of the grounding autotransformer. [450.5_(B)_(2)](https://2023.antflix.net#450.5_(B)_(2))", + "displayTitle": "(2) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#450.5_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#450.5_(B)" + }, + { + "body": "A grounding autotransformer used to limit transitory overvoltages shall be of suitable rating and connected in accordance with 450.5(A)(1). [450.5_(C)](https://2023.antflix.net#450.5_(C))", + "displayTitle": "(C) Ground Reference for Damping Transitory Overvoltages", + "children": [], + "url": "https://2023.antflix.net#450.5_(C)" + } + ], + "url": "https://2023.antflix.net#450.5" + }, + { + "body": "As used in this article, a secondary tie is a circuit operating at 1000 volts, nominal, or less between phases that connects two power sources or power supply points, such as the secondaries of two transformers. The tie shall be permitted to consist of one or more conductors per phase or neutral. Conductors connecting the secondaries of transformers in accordance with 450.7 shall not be considered secondary ties. As used in this section, the word transformer means a transformer or a bank of transformers operating as a unit. [450.6](https://2023.antflix.net#450.6)", + "displayTitle": "450.6 Secondary Ties", + "children": [ + { + "body": "Tie circuits shall be provided with overcurrent protection at each end as required in Parts I, II, and VIII of Article 240. Under the conditions described in 450.6(A)(1) and 450.6(A)(2), the overcurrent protection shall be permitted to be in accordance with 450.6(A)(3). [450.6_(A)](https://2023.antflix.net#450.6_(A))", + "displayTitle": "(A) Tie Circuits", + "children": [ + { + "body": "Where all loads are connected at the transformer supply points at each end of the tie and overcurrent protection is not provided in accordance with Parts I, II, and VIII of Article 240, the ampacity of the tie shall not be less than 67 percent of the rated secondary current of the highest rated transformer supplying the secondary tie system. [450.6_(A)_(1)](https://2023.antflix.net#450.6_(A)_(1))", + "displayTitle": "(1) Loads at Transformer Supply Points Only", + "children": [], + "url": "https://2023.antflix.net#450.6_(A)_(1)" + }, + { + "body": "Where load is connected to the tie at any point between transformer supply points and overcurrent protection is not provided in accordance with Parts I, II, and VIII of Article 240, the ampacity of the tie shall not be less than 100 percent of the rated secondary current of the highest rated transformer supplying the secondary tie system. Exception: Tie circuits comprised of multiple conductors per phase shall be permitted to be sized and protected in accordance with 450.6(A)(4). [450.6_(A)_(2)](https://2023.antflix.net#450.6_(A)_(2))", + "displayTitle": "(2) Loads Connected Between Transformer Supply Points", + "children": [], + "url": "https://2023.antflix.net#450.6_(A)_(2)" + }, + { + "body": "Under the conditions described in 450.6(A)(1) and (A)(2), both supply ends of each ungrounded tie conductor shall be equipped with a protective device that opens at a predetermined temperature of the tie conductor under short-circuit conditions. This protection shall consist of one of the following: (1) a fusible link cable connector, terminal, or lug, commonly known as a limiter, each being of a size corresponding with that of the conductor and of construction and characteristics according to the operating voltage and the type of insulation on the tie conductors or (2) automatic circuit breakers actuated by devices having comparable time-current characteristics. [450.6_(A)_(3)](https://2023.antflix.net#450.6_(A)_(3))", + "displayTitle": "(3) Tie Circuit Protection", + "children": [], + "url": "https://2023.antflix.net#450.6_(A)_(3)" + }, + { + "body": "Where the tie consists of more than one conductor per phase or neutral, the conductors of each phase or neutral shall comply with 450.6(A)(4) (a) or (A)(4) (b). Interconnected. The conductors shall be interconnected in order to establish a load supply point, and the protective device specified in 450.6(A)(3) shall be provided in each ungrounded tie conductor at this point on both sides of the interconnection. The means of interconnection shall have an ampacity not less than the load to be served.Not Interconnected. The loads shall be connected to one or more individual conductors of a paralleled conductor tie without interconnecting the conductors of each phase or neutral and without the protection specified in 450.6(A)(3) at load connection points. Where this is done, the tie conductors of each phase or neutral shall have a combined capacity ampacity of not less than 133 percent of the rated secondary current of the highest rated transformer supplying the secondary tie system, the total load of such taps shall not exceed the rated secondary current of the highest rated transformer, and the loads shall be equally divided on each phase and on the individual conductors of each phase as far as practicable. [450.6_(A)_(4)](https://2023.antflix.net#450.6_(A)_(4))", + "displayTitle": "(4) Interconnection of Phase Conductors Between Transformer Supply Points", + "children": [], + "url": "https://2023.antflix.net#450.6_(A)_(4)" + }, + { + "body": "Where the operating voltage exceeds 150 volts to ground, secondary ties provided with limiters shall have a switch at each end that, when open, de-energizes the associated tie conductors and limiters. The current rating of the switch shall not be less than the rated current ampacity of the conductors connected to the switch. It shall be capable of interrupting its rated current, and it shall be constructed so that it will not open under the magnetic forces resulting from short-circuit current. [450.6_(A)_(5)](https://2023.antflix.net#450.6_(A)_(5))", + "displayTitle": "(5) Tie Circuit Control", + "children": [], + "url": "https://2023.antflix.net#450.6_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#450.6_(A)" + }, + { + "body": "Where secondary ties are used, an overcurrent device rated or set at not more than 250 percent of the rated secondary current of the transformers shall be provided in the secondary connections of each transformer supplying the tie system. In addition, an automatic circuit breaker actuated by a reverse-current relay set to open the circuit at not more than the rated secondary current of the transformer shall be provided in the secondary connection of each transformer. [450.6_(B)](https://2023.antflix.net#450.6_(B))", + "displayTitle": "(B) Overcurrent Protection for Secondary Connections", + "children": [], + "url": "https://2023.antflix.net#450.6_(B)" + }, + { + "body": "Where the secondary tie system is grounded, each transformer secondary supplying the tie system shall be grounded in accordance with 250.30 for separately derived systems. [450.6_(C)](https://2023.antflix.net#450.6_(C))", + "displayTitle": "(C) Grounding", + "children": [], + "url": "https://2023.antflix.net#450.6_(C)" + } + ], + "url": "https://2023.antflix.net#450.6" + }, + { + "body": "Transformers shall be permitted to be operated in parallel and switched as a unit, provided the overcurrent protection for each transformer meets the requirements of 450.3(A) for primary and secondary protective devices over 1000 volts, or 450.3(B) for primary and secondary protective devices 1000 volts or less. [450.7](https://2023.antflix.net#450.7)", + "displayTitle": "450.7 Parallel Operation", + "children": [], + "url": "https://2023.antflix.net#450.7" + }, + { + "body": "Transformers shall be guarded as specified in 450.8(A) through (D). [450.8](https://2023.antflix.net#450.8)", + "displayTitle": "450.8 Guarding", + "children": [ + { + "body": "Appropriate provisions shall be made to minimize the possibility of damage to transformers from external causes where the transformers are exposed to physical damage. [450.8_(A)](https://2023.antflix.net#450.8_(A))", + "displayTitle": "(A) Mechanical Protection", + "children": [], + "url": "https://2023.antflix.net#450.8_(A)" + }, + { + "body": "Dry-type transformers shall be provided with a noncombustible moisture-resistant case or enclosure that provides protection against the accidental insertion of foreign objects. [450.8_(B)](https://2023.antflix.net#450.8_(B))", + "displayTitle": "(B) Case or Enclosure", + "children": [], + "url": "https://2023.antflix.net#450.8_(B)" + }, + { + "body": "Switches or other equipment operating at 1000 volts, nominal, or less and serving only equipment within a transformer enclosure shall be permitted to be installed in the transformer enclosure if accessible to qualified persons only. All energized parts shall be guarded in accordance with 110.27 and 110.34. [450.8_(C)](https://2023.antflix.net#450.8_(C))", + "displayTitle": "(C) Exposed Energized Parts", + "children": [], + "url": "https://2023.antflix.net#450.8_(C)" + }, + { + "body": "The operating voltage of exposed live parts of transformer installations shall be indicated by signs or visible markings on the equipment or structures. [450.8_(D)](https://2023.antflix.net#450.8_(D))", + "displayTitle": "(D) Voltage Warning", + "children": [], + "url": "https://2023.antflix.net#450.8_(D)" + } + ], + "url": "https://2023.antflix.net#450.8" + }, + { + "body": "The ventilation shall dispose of the transformer full-load heat losses without creating a temperature rise that is in excess of the transformer rating. Informational Note No. 1: See IEEE C57.12.00-2015, General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers, and IEEE C57.12.01-2020, General Requirements for Dry-Type Distribution and Power Transformers, for additional information. Informational Note No. 2: See IEEE C57.110-2018, Recommended Practice for Establishing Liquid-Filled and Dry-Type Power and Distribution Transformer Capability When Supplying Nonsinusoidal Load Currents, for more information where transformers are used with nonlinear loads that have nonsinusoidal currents that can result in additional losses and transformer heating. Transformers with ventilating openings shall be installed so that the ventilating openings are not blocked by walls or other obstructions. The required clearances shall be clearly marked on the transformer. Transformer top surfaces that are horizontal and readily accessible shall be marked to prohibit storage. [450.9](https://2023.antflix.net#450.9)", + "displayTitle": "450.9 Ventilation", + "children": [], + "url": "https://2023.antflix.net#450.9" + }, + { + "displayTitle": "450.10 Grounding and Bonding", + "children": [ + { + "body": "Where separate equipment grounding conductors and supply-side bonding jumpers are installed, a terminal bar for all grounding and bonding conductor connections shall be secured inside the transformer enclosure. The terminal bar shall be bonded to the enclosure in accordance with 250.12 and shall not be installed on or over any vented portion of the enclosure. Exception: Where a dry-type transformer is equipped with wire-type connections (leads), the grounding and bonding connections shall be permitted to be connected together using any of the methods in 250.8 and shall be bonded to the enclosure if of metal. [450.10_(A)](https://2023.antflix.net#450.10_(A))", + "displayTitle": "(A) Dry-Type Transformer Enclosures", + "children": [], + "url": "https://2023.antflix.net#450.10_(A)" + }, + { + "body": "Exposed non-current-carrying metal parts of transformer installations, including fences, guards, and so forth, shall be grounded and bonded under the conditions and in the manner specified for electrical equipment and other exposed metal parts in Parts V, VI, and VII of Article 250. [450.10_(B)](https://2023.antflix.net#450.10_(B))", + "displayTitle": "(B) Other Metal Parts", + "children": [], + "url": "https://2023.antflix.net#450.10_(B)" + } + ], + "url": "https://2023.antflix.net#450.10" + }, + { + "displayTitle": "450.11 Marking", + "children": [ + { + "body": "Each transformer shall be provided with a name-plate giving the following information: Name of manufacturerRated kilovolt-amperesFrequencyPrimary and secondary voltageImpedance of transformers 25 kVA and largerRequired clearances for transformers with ventilating openingsAmount and kind of insulating liquid where usedFor dry-type transformers, temperature class for the insulation system [450.11_(A)](https://2023.antflix.net#450.11_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#450.11_(A)" + }, + { + "body": "A transformer shall be permitted to be supplied at the marked secondary voltage, provided that the installation is in accordance with the manufacturer's instructions. [450.11_(B)](https://2023.antflix.net#450.11_(B))", + "displayTitle": "(B) Source Marking", + "children": [], + "url": "https://2023.antflix.net#450.11_(B)" + } + ], + "url": "https://2023.antflix.net#450.11" + }, + { + "body": "The minimum wire-bending space at fixed, 1000-volt and below terminals of transformer line and load connections shall be as required in 312.6. Wiring space for pigtail connections shall conform to Table 314.16(B)(1). [450.12](https://2023.antflix.net#450.12)", + "displayTitle": "450.12 Terminal Wiring Space", + "children": [], + "url": "https://2023.antflix.net#450.12" + }, + { + "body": "All transformers and transformer vaults shall be readily accessible to qualified personnel for inspection and maintenance or shall meet the requirements of 450.13(A) or 450.13(B). [450.13](https://2023.antflix.net#450.13)", + "displayTitle": "450.13 Accessibility", + "children": [ + { + "body": "Dry-type transformers 1000 volts, nominal, or less, located in the open on walls, columns, or structures, shall not be required to be readily accessible. [450.13_(A)](https://2023.antflix.net#450.13_(A))", + "displayTitle": "(A) Open Installations", + "children": [], + "url": "https://2023.antflix.net#450.13_(A)" + }, + { + "body": "Dry-type transformers 1000 volts, nominal, or less and not exceeding 50 kVA shall be permitted in hollow spaces of buildings not permanently closed in by structure, provided they meet the ventilation requirements of 450.9 and separation from combustible materials requirements of 450.21(A). Transformers so installed shall not be required to be readily accessible. [450.13_(B)](https://2023.antflix.net#450.13_(B))", + "displayTitle": "(B) Hollow Space Installations", + "children": [], + "url": "https://2023.antflix.net#450.13_(B)" + } + ], + "url": "https://2023.antflix.net#450.13" + }, + { + "body": "Transformers, other than Class 2 or Class 3 transformers, shall have a disconnecting means located either in sight of the transformer or in a remote location. Where located in a remote location, the disconnecting means shall be lockable open in accordance with 110.25, and its location shall be field marked on the transformer. [450.14](https://2023.antflix.net#450.14)", + "displayTitle": "450.14 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#450.14" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_68_II" + }, + { + "displayTitle": "450.21 Dry-Type Transformers Installed Indoors", + "children": [ + { + "body": "Dry-type transformers installed indoors and rated 1121/2 kVA or less shall have a separation of at least 300 mm (12 in.) from combustible material unless separated from the combustible material by a fire-resistant, heat-insulated barrier. Exception: This rule shall not apply to transformers rated for 1000 volts, nominal, or less that are completely enclosed, except for ventilating openings. [450.21_(A)](https://2023.antflix.net#450.21_(A))", + "displayTitle": "(A) Not Over 1121/2 kVA", + "children": [], + "url": "https://2023.antflix.net#450.21_(A)" + }, + { + "body": "Individual dry-type transformers of more than 1121/2 kVA rating shall be installed in a transformer room of fire-resistant construction having a minimum fire rating of 1 hour. Exception No. 1: Transformers with Class 155 or higher insulation systems and separated from combustible material by a fire-resistant, heat-insulating barrier or by not less than 1.83 m (6 ft) horizontally and 3.7 m (12 ft) vertically shall not be required to be installed in a transformer room. Exception No. 2: Transformers with Class 155 or higher insulation systems and completely enclosed except for ventilating openings shall not be required to be installed in a transformer room. Informational Note: See ASTM E119-18a, Standard Test Methods for Fire Tests of Building Construction and Materials, for additional information on fire-resistance ratings. [450.21_(B)](https://2023.antflix.net#450.21_(B))", + "displayTitle": "(B) Over 1121/2 kVA", + "children": [], + "url": "https://2023.antflix.net#450.21_(B)" + }, + { + "body": "Dry-type transformers rated over 35,000 volts shall be installed in a vault complying with Part III of this article. [450.21_(C)](https://2023.antflix.net#450.21_(C))", + "displayTitle": "(C) Over 35,000 Volts", + "children": [], + "url": "https://2023.antflix.net#450.21_(C)" + } + ], + "url": "https://2023.antflix.net#450.21" + }, + { + "body": "Dry-type transformers installed outdoors shall have a weatherproof enclosure. Transformers exceeding 1121/2 kVA shall not be located within 300 mm (12 in.) of combustible materials of buildings unless the transformer has Class 155 insulation systems or higher and is completely enclosed except for ventilating openings. [450.22](https://2023.antflix.net#450.22)", + "displayTitle": "450.22 Dry-Type Transformers Installed Outdoors", + "children": [], + "url": "https://2023.antflix.net#450.22" + }, + { + "body": "Transformers insulated with listed less-flammable liquids that have a fire point of not less than 300\u00b0C shall be permitted to be installed in accordance with 450.23(A) or 450.23(B). [450.23](https://2023.antflix.net#450.23)", + "displayTitle": "450.23 Less-Flammable Liquid-Insulated Transformers", + "children": [ + { + "body": "Indoor installations shall be permitted in accordance with one of the following: In Type I or Type II buildings, in areas where all of the following requirements are met:The transformer is rated 35,000 volts or less.No combustible materials are stored.A liquid confinement area is provided.The installation complies with all the restrictions provided for in the listing of the liquid.Informational Note: Such restrictions can include, but are not limited to, maximum pressure of the tank, use of a pressure relief valve, appropriate fuse types, and proper sizing of overcurrent protection.If an automatic fire extinguishing system and a liquid confinement area is present, provided the transformer is rated 35,000 volts or lessIf the installation complies with 450.26 [450.23_(A)](https://2023.antflix.net#450.23_(A))", + "displayTitle": "(A) Indoor Installations", + "children": [], + "url": "https://2023.antflix.net#450.23_(A)" + }, + { + "body": "Less-flammable liquid-filled transformers shall be permitted to be installed outdoors, attached to, adjacent to, or on the roof of buildings, if installed in accordance with either of the following: For Type I and Type II buildings, the installation shall comply with all the restrictions provided for in the listing of the liquid.Informational Note No. 1: See NFPA 220-2021, Standard on Types of Building Construction, for definitions of Type I and Type II building construction.Informational Note No. 2: Such restrictions can include, but are not limited to, maximum pressure of the tank, use of a pressure relief valve, appropriate fuse types, and proper sizing of overcurrent protection.In accordance with 450.27.Informational Note No. 3: See 450.27 for examples of additional safeguards that can be required for installations adjacent to combustible material, fire escapes, or door and window openings. [450.23_(B)](https://2023.antflix.net#450.23_(B))", + "displayTitle": "(B) Outdoor Installations", + "children": [], + "url": "https://2023.antflix.net#450.23_(B)" + } + ], + "url": "https://2023.antflix.net#450.23" + }, + { + "body": "Transformers insulated with a dielectric fluid identified as nonflammable shall be permitted to be installed indoors or outdoors. Such transformers installed indoors and rated over 35,000 volts shall be installed in a vault. Such transformers installed indoors shall be furnished with a liquid confinement area and a pressure-relief vent. The transformers shall be furnished with a means for absorbing any gases generated by arcing inside the tank, or the pressure-relief vent shall be connected to a chimney or flue that will carry such gases to an environmentally safe area. Informational Note: Safety may be increased if fire hazard analyses are performed for such transformer installations. For the purposes of this section, a nonflammable dielectric fluid is one that does not have a flash point or fire point and is not flammable in air. [450.24](https://2023.antflix.net#450.24)", + "displayTitle": "450.24 Nonflammable Fluid-Insulated Transformers", + "children": [], + "url": "https://2023.antflix.net#450.24" + }, + { + "body": "Askarel-insulated transformers installed indoors and rated over 25 kVA shall be furnished with a pressure-relief vent. Where installed in a poorly ventilated place, they shall be furnished with a means for absorbing any gases generated by arcing inside the case, or the pressure-relief vent shall be connected to a chimney or flue that carries such gases outside the building. Askarel-insulated transformers rated over 35,000 volts shall be installed in a vault. [450.25](https://2023.antflix.net#450.25)", + "displayTitle": "450.25 Askarel-Insulated Transformers Installed Indoors", + "children": [], + "url": "https://2023.antflix.net#450.25" + }, + { + "body": "Oil-insulated transformers installed indoors shall be installed in a vault constructed as specified in Part III of this article. Exception No. 1: Where the total capacity does not exceed 1121/2 kVA, the vault specified in Part III of this article shall be permitted to be constructed of reinforced concrete that is not less than 100 mm (4 in.) thick. Exception No. 2: Where the nominal voltage does not exceed 1000, a vault shall not be required if suitable arrangements are made to prevent a transformer oil fire from igniting other materials and the total capacity in one location does not exceed 10 kVA in a section of the building classified as combustible or 75 kVA where the surrounding structure is classified as fire-resistant construction. Exception No. 3: Electric furnace transformers that have a total rating not exceeding 75 kVA shall be permitted to be installed without a vault in a building or room of fire-resistant construction, provided suitable arrangements are made to prevent a transformer oil fire from spreading to other combustible material. Exception No. 4: A transformer that has a total rating not exceeding 75 kVA and a supply voltage of 1000 volts or less that is an integral part of charged-particle-accelerating equipment shall be permitted to be installed without a vault in a building or room of noncombustible or fire-resistant construction, provided suitable arrangements are made to prevent a transformer oil fire from spreading to other combustible material. Exception No. 5: Transformers shall be permitted to be installed in a detached building that does not comply with Part III of this article if neither the building nor its contents present a fire hazard to any other building or property, and if the building is used only in supplying electric service and the interior is accessible only to qualified persons. Exception No. 6: Oil-insulated transformers shall be permitted to be used without a vault in portable and mobile surface mining equipment (such as electric excavators) if each of the following conditions is met: (1) Provision is made for draining leaking fluid to the ground. (2) Safe egress is provided for personnel. (3) A minimum 6-mm (1/4-in.) steel barrier is provided for personnel protection. [450.26](https://2023.antflix.net#450.26)", + "displayTitle": "450.26 Oil-Insulated Transformers Installed Indoors", + "children": [], + "url": "https://2023.antflix.net#450.26" + }, + { + "body": "Combustible material, combustible buildings, and parts of buildings, fire escapes, and door and window openings shall be safeguarded from fires originating in oil-insulated transformers installed on roofs, attached to or adjacent to a building or combustible material. In cases where the transformer installation presents a fire hazard, one or more of the following safeguards shall be applied according to the degree of hazard involved:Space separationsFire-resistant barriersAutomatic fire suppression systemsEnclosures that confine the oil of a ruptured transformer tankOil enclosures shall be permitted to consist of fire-resistant dikes, curbed areas or basins, or trenches filled with coarse, crushed stone. Oil enclosures shall be provided with trapped drains where the exposure and the quantity of oil involved are such that removal of oil is important.Informational Note: See ANSI/IEEE C2-2017, National Electrical Safety Code, for additional information on transformers installed on poles or structures or underground. [450.27](https://2023.antflix.net#450.27)", + "displayTitle": "450.27 Oil-Insulated Transformers Installed Outdoors", + "children": [], + "url": "https://2023.antflix.net#450.27" + }, + { + "body": "When modifications are made to a transformer in an existing installation that change the type of the transformer with respect to Part II of this article, such transformer shall be marked to show the type of insulating liquid installed, and the modified transformer installation shall comply with the applicable requirements for that type of transformer. [450.28](https://2023.antflix.net#450.28)", + "displayTitle": "450.28 Modification of Transformers", + "children": [], + "url": "https://2023.antflix.net#450.28" + }, + { + "displayTitle": "Part III Transformer Vaults", + "children": [], + "url": "https://2023.antflix.net#divider_60_III" + }, + { + "body": "Vaults shall be located where they can be ventilated to the outside air without using flues or ducts wherever such an arrangement is practicable. [450.41](https://2023.antflix.net#450.41)", + "displayTitle": "450.41 Location", + "children": [], + "url": "https://2023.antflix.net#450.41" + }, + { + "body": "The walls and roofs of vaults shall be constructed of materials that have approved structural strength for the conditions with a minimum fire resistance of 3 hours. The floors of vaults in contact with the earth shall be of concrete that is not less than 100 mm (4 in.) thick, but, where the vault is constructed with a vacant space or other stories below it, the floor shall have approved structural strength for the load imposed thereon and a minimum fire resistance of 3 hours. For the purposes of this section, studs and wallboard construction shall not be permitted. Exception: Where transformers are protected with automatic sprinkler, water spray, carbon dioxide, or halon, construction of 1-hour rating shall be permitted. Informational Note No. 1: See ASTM E119-20, Standard Test Methods for Fire Tests of Building Construction and Materials, for additional information. Informational Note No. 2: A typical 3-hour construction is 150 mm (6 in.) thick reinforced concrete. [450.42](https://2023.antflix.net#450.42)", + "displayTitle": "450.42 Walls, Roofs, and Floors", + "children": [], + "url": "https://2023.antflix.net#450.42" + }, + { + "body": "Vault doorways shall be protected in accordance with 450.43(A), (B), and (C). [450.43](https://2023.antflix.net#450.43)", + "displayTitle": "450.43 Doorways", + "children": [ + { + "body": "Each doorway leading into a vault from the building interior shall be provided with a tight-fitting door that has a minimum fire rating of 3 hours. The authority having jurisdiction shall be permitted to require such a door for an exterior wall opening where conditions warrant. Exception: Where transformers are protected with automatic sprinkler, water spray, carbon dioxide, or halon, construction of 1-hour rating shall be permitted. Informational Note: See NFPA 80-2019, Standard for Fire Doors and Other Opening Protectives, for additional information. [450.43_(A)](https://2023.antflix.net#450.43_(A))", + "displayTitle": "(A) Type of Door", + "children": [], + "url": "https://2023.antflix.net#450.43_(A)" + }, + { + "body": "A door sill or curb that is of an approved height that will confine the oil from the largest transformer within the vault shall be provided, and in no case shall the height be less than 100 mm (4 in.). [450.43_(B)](https://2023.antflix.net#450.43_(B))", + "displayTitle": "(B) Sills", + "children": [], + "url": "https://2023.antflix.net#450.43_(B)" + }, + { + "body": "Doors shall be equipped with locks, and doors shall be kept locked, with access being allowed only to qualified persons. Personnel doors shall be capable of opening not less than 90 degrees in the direction of egress and be equipped with listed fire exit hardware. [450.43_(C)](https://2023.antflix.net#450.43_(C))", + "displayTitle": "(C) Accessibility", + "children": [], + "url": "https://2023.antflix.net#450.43_(C)" + } + ], + "url": "https://2023.antflix.net#450.43" + }, + { + "body": "Where required by 450.9, openings for ventilation shall be provided in accordance with 450.45(A) through (F). [450.45](https://2023.antflix.net#450.45)", + "displayTitle": "450.45 Ventilation Openings", + "children": [ + { + "body": "Ventilation openings shall be located as far as possible from doors, windows, fire escapes, and combustible material. [450.45_(A)](https://2023.antflix.net#450.45_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#450.45_(A)" + }, + { + "body": "A vault ventilated by natural circulation of air shall be permitted to have roughly half of the total area of openings required for ventilation in one or more openings near the floor and the remainder in one or more openings in the roof or in the sidewalls near the roof, or all of the area required for ventilation shall be permitted in one or more openings in or near the roof. [450.45_(B)](https://2023.antflix.net#450.45_(B))", + "displayTitle": "(B) Arrangement", + "children": [], + "url": "https://2023.antflix.net#450.45_(B)" + }, + { + "body": "For a vault ventilated by natural circulation of air to an outdoor area, the combined net area of all ventilating openings, after deducting the area occupied by screens, gratings, or louvers, shall not be less than 1900 mm2 (3 in.2) per kVA of transformer capacity in service, and in no case shall the net area be less than 0.1 m2 (1 ft2) for any capacity under 50 kVA. [450.45_(C)](https://2023.antflix.net#450.45_(C))", + "displayTitle": "(C) Size", + "children": [], + "url": "https://2023.antflix.net#450.45_(C)" + }, + { + "body": "Ventilation openings shall be covered with durable gratings, screens, or louvers, according to the treatment required in order to avoid unsafe conditions. [450.45_(D)](https://2023.antflix.net#450.45_(D))", + "displayTitle": "(D) Covering", + "children": [], + "url": "https://2023.antflix.net#450.45_(D)" + }, + { + "body": "All ventilation openings to the indoors shall be provided with automatic closing fire dampers that operate in response to a vault fire. Such dampers shall possess a standard fire rating of not less than 11/2 hours. Informational Note: See ANSI/UL 555-2020, Standard for Fire Dampers, for additional information on fire dampers. [450.45_(E)](https://2023.antflix.net#450.45_(E))", + "displayTitle": "(E) Dampers", + "children": [], + "url": "https://2023.antflix.net#450.45_(E)" + }, + { + "body": "Ventilating ducts shall be constructed of fire-resistant material. [450.45_(F)](https://2023.antflix.net#450.45_(F))", + "displayTitle": "(F) Ducts", + "children": [], + "url": "https://2023.antflix.net#450.45_(F)" + } + ], + "url": "https://2023.antflix.net#450.45" + }, + { + "body": "Where practicable, vaults containing more than 100 kVA transformer capacity shall be provided with a drain or other means that will carry off any accumulation of oil or water in the vault unless local conditions make this impracticable. The floor shall be pitched to the drain where provided. [450.46](https://2023.antflix.net#450.46)", + "displayTitle": "450.46 Drainage", + "children": [], + "url": "https://2023.antflix.net#450.46" + }, + { + "body": "Any pipe or duct system foreign to the electrical installation shall not enter or pass through a transformer vault. Piping or other facilities provided for vault fire protection, or for transformer cooling, shall not be considered foreign to the electrical installation. [450.47](https://2023.antflix.net#450.47)", + "displayTitle": "450.47 Water Pipes and Accessories", + "children": [], + "url": "https://2023.antflix.net#450.47" + }, + { + "body": "Materials shall not be stored in transformer vaults. [450.48](https://2023.antflix.net#450.48)", + "displayTitle": "450.48 Storage in Vaults", + "children": [], + "url": "https://2023.antflix.net#450.48" + } + ], + "url": "https://2023.antflix.net#450" + }, + { + "displayTitle": "Article 455 Phase Converters", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_69_I" + }, + { + "body": "This article covers the installation and use of phase converters. [455.1](https://2023.antflix.net#455.1)", + "displayTitle": "455.1 Scope", + "children": [], + "url": "https://2023.antflix.net#455.1" + }, + { + "body": "Phase converters shall comply with this article and with the applicable provisions of other articles of this Code. [455.3](https://2023.antflix.net#455.3)", + "displayTitle": "455.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#455.3" + }, + { + "body": "Each phase converter shall be provided with a permanent nameplate indicating the following: Manufacturer's nameRated input and output voltagesFrequencyRated single-phase input full-load amperesRated minimum and maximum single load in kilovolt-amperes (kVA) or horsepowerMaximum total load in kilovolt-amperes (kVA) or horsepowerFor a rotary-phase converter, 3-phase amperes at full load [455.4](https://2023.antflix.net#455.4)", + "displayTitle": "455.4 Marking", + "children": [], + "url": "https://2023.antflix.net#455.4" + }, + { + "body": "A means for attachment of an equipment grounding conductor termination in accordance with 250.8 shall be provided. [455.5](https://2023.antflix.net#455.5)", + "displayTitle": "455.5 Equipment Grounding Connection", + "children": [], + "url": "https://2023.antflix.net#455.5" + }, + { + "displayTitle": "455.6 Conductors", + "children": [ + { + "body": "The ampacity of the single-phase supply conductors shall be determined by 455.6(A)(1) or (A)(2). Informational Note: Single-phase conductors sized to prevent a voltage drop not exceeding 3 percent from the source of supply to the phase converter may help ensure proper starting and operation of motor loads. [455.6_(A)](https://2023.antflix.net#455.6_(A))", + "displayTitle": "(A) Ampacity", + "children": [ + { + "body": "Where the loads to be supplied are variable, the conductor ampacity shall not be less than 125 percent of the phase converter nameplate single-phase input full-load amperes. [455.6_(A)_(1)](https://2023.antflix.net#455.6_(A)_(1))", + "displayTitle": "(1) Variable Loads", + "children": [], + "url": "https://2023.antflix.net#455.6_(A)_(1)" + }, + { + "body": "Where the phase converter supplies specific fixed loads, and the conductor ampacity is less than 125 percent of the phase converter nameplate single-phase input full-load amperes, the conductors shall have an ampacity not less than 250 percent of the sum of the full-load, 3-phase current rating of the motors and other loads served where the input and output voltages of the phase converter are identical. Where the input and output voltages of the phase converter are different, the current as determined by this section shall be multiplied by the ratio of output to input voltage. [455.6_(A)_(2)](https://2023.antflix.net#455.6_(A)_(2))", + "displayTitle": "(2) Fixed Loads", + "children": [], + "url": "https://2023.antflix.net#455.6_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#455.6_(A)" + }, + { + "body": "The manufactured phase conductors shall be identified in all accessible locations with a distinctive marking. The marking shall be consistent throughout the system and premises. [455.6_(B)](https://2023.antflix.net#455.6_(B))", + "displayTitle": "(B) Manufactured Phase Marking", + "children": [], + "url": "https://2023.antflix.net#455.6_(B)" + } + ], + "url": "https://2023.antflix.net#455.6" + }, + { + "body": "The single-phase supply conductors and phase converter shall be protected from over-current by 455.7(A) or (B). Where the required fuse or nonadjustable circuit breaker rating or settings of adjustable circuit breakers do not correspond to a standard rating or setting, a higher rating or setting that does not exceed the next higher standard rating shall be permitted. [455.7](https://2023.antflix.net#455.7)", + "displayTitle": "455.7 Overcurrent Protection", + "children": [ + { + "body": "Where the loads to be supplied are variable, overcurrent protection shall be set at not more than 125 percent of the phase converter nameplate single-phase input full-load amperes. [455.7_(A)](https://2023.antflix.net#455.7_(A))", + "displayTitle": "(A) Variable Loads", + "children": [], + "url": "https://2023.antflix.net#455.7_(A)" + }, + { + "body": "Where the phase converter supplies specific fixed loads and the conductors are sized in accordance with 455.6(A)(2), the conductors shall be protected in accordance with their ampacity. The overcurrent protection determined from this section shall not exceed 125 percent of the phase converter nameplate single-phase input amperes. [455.7_(B)](https://2023.antflix.net#455.7_(B))", + "displayTitle": "(B) Fixed Loads", + "children": [], + "url": "https://2023.antflix.net#455.7_(B)" + } + ], + "url": "https://2023.antflix.net#455.7" + }, + { + "body": "Means shall be provided to disconnect simultaneously all ungrounded single-phase supply conductors to the phase converter. [455.8](https://2023.antflix.net#455.8)", + "displayTitle": "455.8 Disconnecting Means", + "children": [ + { + "body": "The disconnecting means shall be readily accessible and located in sight from the phase converter. [455.8_(A)](https://2023.antflix.net#455.8_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#455.8_(A)" + }, + { + "body": "The disconnecting means shall be a switch rated in horsepower, a circuit breaker, or a molded-case switch. Where only nonmotor loads are served, an ampere-rated switch shall be permitted. [455.8_(B)](https://2023.antflix.net#455.8_(B))", + "displayTitle": "(B) Type", + "children": [], + "url": "https://2023.antflix.net#455.8_(B)" + }, + { + "body": "The ampere rating of the disconnecting means shall not be less than 115 percent of the rated maximum single-phase input full-load amperes or, for specific fixed loads, shall be permitted to be selected from 455.8(C)(1) or (C)(2). [455.8_(C)](https://2023.antflix.net#455.8_(C))", + "displayTitle": "(C) Rating", + "children": [ + { + "body": "The disconnecting means shall be a circuit breaker or molded-case switch with an ampere rating not less than 250 percent of the sum of the following: Full-load, 3-phase current ratings of the motorsOther loads served [455.8_(C)_(1)](https://2023.antflix.net#455.8_(C)_(1))", + "displayTitle": "(1) Current Rated Disconnect", + "children": [], + "url": "https://2023.antflix.net#455.8_(C)_(1)" + }, + { + "body": "The disconnecting means shall be a switch with a horsepower rating. The equivalent locked rotor current of the horsepower rating of the switch shall not be less than 200 percent of the sum of the following: Nonmotor loadsThe 3-phase, locked-rotor current of the largest motor as determined from Table 430.251 (B)The full-load current of all other 3-phase motors operating at the same time [455.8_(C)_(2)](https://2023.antflix.net#455.8_(C)_(2))", + "displayTitle": "(2) Horsepower Rated Disconnect", + "children": [], + "url": "https://2023.antflix.net#455.8_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#455.8_(C)" + }, + { + "body": "The calculations in 455.8(C) shall apply directly where the input and output voltages of the phase converter are identical. Where the input and output voltages of the phase converter are different, the current shall be multiplied by the ratio of the output to input voltage. [455.8_(D)](https://2023.antflix.net#455.8_(D))", + "displayTitle": "(D) Voltage Ratios", + "children": [], + "url": "https://2023.antflix.net#455.8_(D)" + } + ], + "url": "https://2023.antflix.net#455.8" + }, + { + "body": "Where single-phase loads are connected on the load side of a phase converter, they shall not be connected to the manufactured phase. [455.9](https://2023.antflix.net#455.9)", + "displayTitle": "455.9 Connection of Single-Phase Loads", + "children": [], + "url": "https://2023.antflix.net#455.9" + }, + { + "body": "A terminal housing in accordance with the provisions of 430.12 shall be provided on a phase converter. [455.10](https://2023.antflix.net#455.10)", + "displayTitle": "455.10 Terminal Housings", + "children": [], + "url": "https://2023.antflix.net#455.10" + }, + { + "displayTitle": "Part II Specific Provisions Applicable to Different Types of Phase Converters", + "children": [], + "url": "https://2023.antflix.net#divider_69_II" + }, + { + "body": "The single-phase disconnecting means for the input of a static phase converter shall be permitted to serve as the disconnecting means for the phase converter and a single load if the load is within sight of the disconnecting means. [455.20](https://2023.antflix.net#455.20)", + "displayTitle": "455.20 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#455.20" + }, + { + "body": "Power to the utilization equipment shall not be supplied until the rotary-phase converter has been started. [455.21](https://2023.antflix.net#455.21)", + "displayTitle": "455.21 Start-Up", + "children": [], + "url": "https://2023.antflix.net#455.21" + }, + { + "body": "Utilization equipment supplied by a rotary-phase converter shall be controlled in such a manner that power to the equipment will be disconnected in the event of a power interruption. Informational Note: Magnetic motor starters, magnetic contactors, and similar devices, with manual or time delay restarting for the load, provide restarting after power interruption. [455.22](https://2023.antflix.net#455.22)", + "displayTitle": "455.22 Power Interruption", + "children": [], + "url": "https://2023.antflix.net#455.22" + }, + { + "body": "Capacitors that are not an integral part of the rotary-phase conversion system but are installed for a motor load shall be connected to the line side of that motor overload protective device. [455.23](https://2023.antflix.net#455.23)", + "displayTitle": "455.23 Capacitors", + "children": [], + "url": "https://2023.antflix.net#455.23" + } + ], + "url": "https://2023.antflix.net#455" + }, + { + "displayTitle": "Article 460 Capacitors", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_70_I" + }, + { + "body": "This article covers the installation of capacitors on electrical circuits. Surge capacitors or capacitors included as a component part of other apparatus and conforming with the requirements of such apparatus are excluded from these requirements. [460.1](https://2023.antflix.net#460.1)", + "displayTitle": "460.1 Scope", + "children": [], + "url": "https://2023.antflix.net#460.1" + }, + { + "displayTitle": "460.3 Enclosing and Guarding", + "children": [ + { + "body": "Capacitors containing more than 11 L (3 gal) of flammable liquid shall be enclosed in vaults or outdoor fenced enclosures complying with Article 110, Part III. This limit shall apply to any single unit in an installation of capacitors. [460.3_(A)](https://2023.antflix.net#460.3_(A))", + "displayTitle": "(A) Containing More Than 11 L (3 Gal) of Flammable Liquid", + "children": [], + "url": "https://2023.antflix.net#460.3_(A)" + }, + { + "body": "Where capacitors are accessible to unauthorized and unqualified persons, they shall be enclosed, located, or guarded so that persons cannot come into accidental contact or bring conducting materials into accidental contact with exposed energized parts, terminals, or buses associated with them. However, no additional guarding is required for enclosures accessible only to authorized and qualified persons. [460.3_(B)](https://2023.antflix.net#460.3_(B))", + "displayTitle": "(B) Accidental Contact", + "children": [], + "url": "https://2023.antflix.net#460.3_(B)" + } + ], + "url": "https://2023.antflix.net#460.3" + }, + { + "displayTitle": "Part II 1000 Volts, Nominal, or Less", + "children": [], + "url": "https://2023.antflix.net#divider_70_II" + }, + { + "body": "Capacitors shall be provided with a means of discharging stored energy. [460.6](https://2023.antflix.net#460.6)", + "displayTitle": "460.6 Discharge of Stored Energy", + "children": [ + { + "body": "The residual voltage of a capacitor shall be reduced to 50 volts, nominal, or less within 1 minute after the capacitor is disconnected from the source of supply. [460.6_(A)](https://2023.antflix.net#460.6_(A))", + "displayTitle": "(A) Time of Discharge", + "children": [], + "url": "https://2023.antflix.net#460.6_(A)" + }, + { + "body": "The discharge circuit shall be either permanently connected to the terminals of the capacitor or capacitor bank or provided with automatic means of connecting it to the terminals of the capacitor bank on removal of voltage from the line. Manual means of switching or connecting the discharge circuit shall not be used. [460.6_(B)](https://2023.antflix.net#460.6_(B))", + "displayTitle": "(B) Means of Discharge", + "children": [], + "url": "https://2023.antflix.net#460.6_(B)" + } + ], + "url": "https://2023.antflix.net#460.6" + }, + { + "displayTitle": "460.8 Conductors", + "children": [ + { + "body": "The ampacity of capacitor circuit conductors shall not be less than 135 percent of the rated current of the capacitor. The ampacity of conductors that connect a capacitor to the terminals of a motor or to motor circuit conductors shall not be less than one-third the ampacity of the motor circuit conductors and in no case less than 135 percent of the rated current of the capacitor. [460.8_(A)](https://2023.antflix.net#460.8_(A))", + "displayTitle": "(A) Ampacity", + "children": [], + "url": "https://2023.antflix.net#460.8_(A)" + }, + { + "body": "An overcurrent device shall be provided in each ungrounded conductor for each capacitor bank. The rating or setting of the overcurrent device shall be as low as practicable. Exception: A separate overcurrent device shall not be required for a capacitor connected on the load side of a motor overload protective device. [460.8_(B)](https://2023.antflix.net#460.8_(B))", + "displayTitle": "(B) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#460.8_(B)" + }, + { + "body": "A disconnecting means shall be provided in each ungrounded conductor for each capacitor bank and shall meet the following requirements: The disconnecting means shall open all ungrounded conductors simultaneously.The disconnecting means shall be permitted to disconnect the capacitor from the line as a regular operating procedure.The rating of the disconnecting means shall not be less than 135 percent of the rated current of the capacitor.Exception: A separate disconnecting means shall not be required where a capacitor is connected on the load side of a motor controller. [460.8_(C)](https://2023.antflix.net#460.8_(C))", + "displayTitle": "(C) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#460.8_(C)" + } + ], + "url": "https://2023.antflix.net#460.8" + }, + { + "body": "Where a motor installation includes a capacitor connected on the load side of the motor overload device, the rating or setting of the motor overload device shall be based on the improved power factor of the motor circuit. The effect of the capacitor shall be disregarded in determining the motor circuit conductor rating in accordance with 430.22. [460.9](https://2023.antflix.net#460.9)", + "displayTitle": "460.9 Rating or Setting of Motor Overload Device", + "children": [], + "url": "https://2023.antflix.net#460.9" + }, + { + "body": "Capacitor cases shall be connected to the equipment grounding conductor. Exception: Capacitor cases shall not be connected to the equipment grounding conductor where the capacitor units are supported on a structure designed to operate at other than ground potential. [460.10](https://2023.antflix.net#460.10)", + "displayTitle": "460.10 Grounding", + "children": [], + "url": "https://2023.antflix.net#460.10" + }, + { + "body": "Each capacitor shall be provided with a nameplate giving the name of the manufacturer, rated voltage, frequency, kilovar or amperes, number of phases, and, if filled with a combustible liquid, the volume of liquid. Where filled with a nonflammable liquid, the nameplate shall so state. The nameplate shall also indicate whether a capacitor has a discharge device inside the case. [460.12](https://2023.antflix.net#460.12)", + "displayTitle": "460.12 Marking", + "children": [], + "url": "https://2023.antflix.net#460.12" + }, + { + "displayTitle": "Part III Over 1000 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#divider_61_III" + }, + { + "displayTitle": "460.24 Switching", + "children": [ + { + "body": "Switches shall be rated for switching of capacitive loads. Capacitor switch operation shall open all ungrounded conductors and the switch shall be capable of the following: Carrying continuously not less than 135 percent of the rated current of the capacitor installationInterrupting the maximum continuous load current of each capacitor, capacitor bank, or capacitor installation that will be switched as a unitWithstanding the maximum inrush current, including contributions from adjacent capacitor installationsCarrying currents due to faults on capacitor side of switch [460.24_(A)](https://2023.antflix.net#460.24_(A))", + "displayTitle": "(A) Load Current", + "children": [], + "url": "https://2023.antflix.net#460.24_(A)" + }, + { + "displayTitle": "(B) Isolation", + "children": [ + { + "body": "A means shall be installed to isolate from all sources of voltage each capacitor, capacitor bank, or capacitor installation that will be removed from service as a unit. The isolating means shall provide a visible gap in the electrical circuit adequate for the operating voltage. [460.24_(B)_(1)](https://2023.antflix.net#460.24_(B)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#460.24_(B)_(1)" + }, + { + "body": "Isolating or disconnecting switches (with no interrupting rating) shall be interlocked with the load-interrupting device or be provided with prominently displayed caution signs in accordance with 495.22 to prevent switching load current. [460.24_(B)_(2)](https://2023.antflix.net#460.24_(B)_(2))", + "displayTitle": "(2) Isolating or Disconnecting Switches With No Interrupting Rating", + "children": [], + "url": "https://2023.antflix.net#460.24_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#460.24_(B)" + }, + { + "body": "The proper switching sequence shall be ensured by use of one of the following: Mechanically sequenced isolating and bypass switchesInterlocksSwitching procedure prominently displayed at the switching location [460.24_(C)](https://2023.antflix.net#460.24_(C))", + "displayTitle": "(C) Additional Requirements for Series Capacitors", + "children": [], + "url": "https://2023.antflix.net#460.24_(C)" + } + ], + "url": "https://2023.antflix.net#460.24" + }, + { + "displayTitle": "460.25 Overcurrent Protection", + "children": [ + { + "body": "A means shall be provided to detect and interrupt fault current likely to cause dangerous pressure within an individual capacitor. [460.25_(A)](https://2023.antflix.net#460.25_(A))", + "displayTitle": "(A) Provided to Detect and Interrupt Fault Current", + "children": [], + "url": "https://2023.antflix.net#460.25_(A)" + }, + { + "body": "Single-pole or multipole devices shall be permitted for this purpose. [460.25_(B)](https://2023.antflix.net#460.25_(B))", + "displayTitle": "(B) Single Pole or Multipole Devices", + "children": [], + "url": "https://2023.antflix.net#460.25_(B)" + }, + { + "body": "Capacitors shall be permitted to be protected individually or in groups. [460.25_(C)](https://2023.antflix.net#460.25_(C))", + "displayTitle": "(C) Protected Individually or in Groups", + "children": [], + "url": "https://2023.antflix.net#460.25_(C)" + }, + { + "body": "Protective devices for capacitors or capacitor equipment shall be rated or adjusted to operate within the limits of the safe zone for individual capacitors. [460.25_(D)](https://2023.antflix.net#460.25_(D))", + "displayTitle": "(D) Protective Devices Rated or Adjusted", + "children": [], + "url": "https://2023.antflix.net#460.25_(D)" + } + ], + "url": "https://2023.antflix.net#460.25" + }, + { + "body": "Each capacitor shall be provided with a permanent nameplate giving the manufacturer's name, rated voltage, frequency, kilovar or amperes, number of phases, and the volume of liquid identified as flammable, if such is the case. [460.26](https://2023.antflix.net#460.26)", + "displayTitle": "460.26 Identification", + "children": [], + "url": "https://2023.antflix.net#460.26" + }, + { + "body": "Capacitor cases shall be connected to the equipment grounding conductor. If the capacitor neutral point is connected to a grounding electrode conductor, the connection shall be made in accordance with Part III of Article 250. Exception: Capacitor cases shall not be connected to the equipment grounding conductor where the capacitor units are supported on a structure designed to operate at other than ground potential. [460.27](https://2023.antflix.net#460.27)", + "displayTitle": "460.27 Grounding", + "children": [], + "url": "https://2023.antflix.net#460.27" + }, + { + "displayTitle": "460.28 Means for Discharge", + "children": [ + { + "body": "A means shall be provided to reduce the residual voltage of a capacitor to 50 volts or less within 5 minutes after the capacitor is disconnected from the source of supply. [460.28_(A)](https://2023.antflix.net#460.28_(A))", + "displayTitle": "(A) Means to Reduce the Residual Voltage", + "children": [], + "url": "https://2023.antflix.net#460.28_(A)" + }, + { + "body": "A discharge circuit shall be either permanently connected to the terminals of the capacitor or provided with automatic means of connecting it to the terminals of the capacitor bank after disconnection of the capacitor from the source of supply. The windings of motors, transformers, or other equipment directly connected to capacitors without a switch or overcurrent device interposed shall meet the requirements of 460.28(A). [460.28_(B)](https://2023.antflix.net#460.28_(B))", + "displayTitle": "(B) Connection to Terminals", + "children": [], + "url": "https://2023.antflix.net#460.28_(B)" + } + ], + "url": "https://2023.antflix.net#460.28" + } + ], + "url": "https://2023.antflix.net#460" + }, + { + "displayTitle": "Article 470 Resistors and Reactors", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_71_I" + }, + { + "body": "This article covers the installation of separate resistors and reactors on electrical circuits. Exception: This article does not cover resistors and reactors that are component parts of other apparatus. [470.1](https://2023.antflix.net#470.1)", + "displayTitle": "470.1 Scope", + "children": [], + "url": "https://2023.antflix.net#470.1" + }, + { + "displayTitle": "470.2 Reconditioned Equipment", + "children": [ + { + "body": "Reconditioned resistors shall not be permitted. [470.2_(A)](https://2023.antflix.net#470.2_(A))", + "displayTitle": "(A) Resistors", + "children": [], + "url": "https://2023.antflix.net#470.2_(A)" + }, + { + "body": "Reconditioned reactors shall be permitted. [470.2_(B)](https://2023.antflix.net#470.2_(B))", + "displayTitle": "(B) Reactors", + "children": [], + "url": "https://2023.antflix.net#470.2_(B)" + } + ], + "url": "https://2023.antflix.net#470.2" + }, + { + "displayTitle": "Part II 1000 Volts, Nominal, or Less", + "children": [], + "url": "https://2023.antflix.net#divider_71_II" + }, + { + "body": "Resistors and reactors shall not be placed where exposed to physical damage. [470.10](https://2023.antflix.net#470.10)", + "displayTitle": "470.10 Location", + "children": [], + "url": "https://2023.antflix.net#470.10" + }, + { + "body": "A thermal barrier shall be required if the space between the resistors or reactors and any combustible material is less than 305 mm (12 in.). [470.11](https://2023.antflix.net#470.11)", + "displayTitle": "470.11 Space Separation", + "children": [], + "url": "https://2023.antflix.net#470.11" + }, + { + "body": "Insulated conductors used for connections between resistance elements and controllers shall be suitable for an operating temperature of not less than 90\u00b0C (194\u00b0F). Exception: Other conductor insulations shall be permitted for the motor starting service. [470.12](https://2023.antflix.net#470.12)", + "displayTitle": "470.12 Conductor Insulation", + "children": [], + "url": "https://2023.antflix.net#470.12" + }, + { + "displayTitle": "Part III Over 1000 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#divider_62_III" + }, + { + "displayTitle": "470.20 General", + "children": [ + { + "body": "Resistors and reactors shall be protected against physical damage. [470.20_(A)](https://2023.antflix.net#470.20_(A))", + "displayTitle": "(A) Protected Against Physical Damage", + "children": [], + "url": "https://2023.antflix.net#470.20_(A)" + }, + { + "body": "Resistors and reactors shall be isolated by enclosure or elevation to protect personnel from accidental contact with energized parts. [470.20_(B)](https://2023.antflix.net#470.20_(B))", + "displayTitle": "(B) Isolated by Enclosure or Elevation", + "children": [], + "url": "https://2023.antflix.net#470.20_(B)" + }, + { + "body": "Resistors and reactors shall not be installed in close enough proximity to combustible materials to constitute a fire hazard and shall have a clearance of not less than 305 mm (12 in.) from combustible materials. [470.20_(C)](https://2023.antflix.net#470.20_(C))", + "displayTitle": "(C) Combustible Materials", + "children": [], + "url": "https://2023.antflix.net#470.20_(C)" + }, + { + "body": "Clearances from resistors and reactors to grounded surfaces shall be adequate for the voltage involved. [470.20_(D)](https://2023.antflix.net#470.20_(D))", + "displayTitle": "(D) Clearances", + "children": [], + "url": "https://2023.antflix.net#470.20_(D)" + }, + { + "body": "Metallic enclosures of reactors and adjacent metal parts shall be installed so that the temperature rise from induced circulating currents is not hazardous to personnel or does not constitute a fire hazard. [470.20_(E)](https://2023.antflix.net#470.20_(E))", + "displayTitle": "(E) Temperature Rise From Induced Circulating Currents", + "children": [], + "url": "https://2023.antflix.net#470.20_(E)" + } + ], + "url": "https://2023.antflix.net#470.20" + }, + { + "body": "Resistor and reactor cases or enclosures shall be connected to the equipment grounding conductor. Exception: Resistor or reactor cases or enclosures supported on a structure designed to operate at other than ground potential shall not be connected to the equipment grounding conductor. [470.21](https://2023.antflix.net#470.21)", + "displayTitle": "470.21 Grounding", + "children": [], + "url": "https://2023.antflix.net#470.21" + }, + { + "body": "Installation of oil-filled reactors, in addition to the above requirements, shall comply with applicable requirements of Part II and Part III of Article 450. [470.22](https://2023.antflix.net#470.22)", + "displayTitle": "470.22 Oil-Filled Reactors", + "children": [], + "url": "https://2023.antflix.net#470.22" + } + ], + "url": "https://2023.antflix.net#470" + }, + { + "displayTitle": "Article 480 Stationary Standby Batteries", + "children": [ + { + "body": "This article applies to all installations of stationary standby batteries having a capacity greater than 3.6 MJ (1 kWh). Informational Note No. 1: See Article 706 for installations that do not meet the definition of stationary standby batteries. Informational Note No. 2: The following standards are frequently referenced for the installation of stationary batteries: IEEE 484, Recommended Practice for Installation Design and Installation of Vented Lead-Acid Batteries for Stationary ApplicationsIEEE 485, Recommended Practice for Sizing Vented Lead-Acid Storage Batteries for Stationary ApplicationsIEEE 1145, Recommended Practice for Installation and Maintenance of Nickel-Cadmium Batteries for Photovoltaic (PV) SystemsIEEE 1187, IEEE Recommended Practice for Installation Design, and Installation of Valve-Regulated Lead-Acid Batteries for Stationary ApplicationsIEEE 1375, IEEE Guide for the Protection of Stationary Battery SystemsIEEE 1578, Recommended Practice for Stationary Battery Electrolyte Spill Containment and ManagementIEEE 1635/ASHRAE 21, Guide for the Ventilation and Thermal Management of Batteries for Stationary ApplicationsUL 1973, Standard for Batteries for Use in Stationary, Vehicle Auxiliary Power, and Light Electric Rail (LER) ApplicationsUL Subject 2436, Outline of Investigation for Spill Containment for Stationary Lead Acid Battery SystemsUL 1989, Standard for Standby BatteriesUL Subject 1974, Standard for Evaluation of Repurposed BatteriesNFPA 855-2020, Standard for the Installation of Stationary Energy Storage Systems [480.1](https://2023.antflix.net#480.1)", + "displayTitle": "480.1 Scope", + "children": [], + "url": "https://2023.antflix.net#480.1" + }, + { + "body": "Storage batteries and battery management equipment shall be listed. This requirement shall not apply to lead-acid batteries. [480.3](https://2023.antflix.net#480.3)", + "displayTitle": "480.3 Equipment", + "children": [], + "url": "https://2023.antflix.net#480.3" + }, + { + "displayTitle": "480.4 Battery and Cell Terminations", + "children": [ + { + "body": "Where mating dissimilar metals, antioxidant material suitable for the battery connection shall be used where recommended by the battery manufacturer's installation and instruction manual. [480.4_(A)](https://2023.antflix.net#480.4_(A))", + "displayTitle": "(A) Corrosion Prevention", + "children": [], + "url": "https://2023.antflix.net#480.4_(A)" + }, + { + "body": "The ampacity of field-assembled intercell and intertier connectors and conductors shall be of such cross-sectional area that the temperature rise under maximum load conditions and at maximum ambient temperature shall not exceed the safe operating temperature of the conductor insulation or of the material of the conductor supports. Informational Note: Conductors sized to prevent a voltage drop exceeding 3 percent of maximum anticipated load, and where the maximum total voltage drop to the furthest point of connection does not exceed 5 percent, may not be appropriate for all battery applications. IEEE 1375-2003, Guide for the Protection of Stationary Battery Systems, provides guidance for overcurrent protection and associated cable sizing. [480.4_(B)](https://2023.antflix.net#480.4_(B))", + "displayTitle": "(B) Intercell and Intertier Conductors and Connections", + "children": [], + "url": "https://2023.antflix.net#480.4_(B)" + }, + { + "body": "Electrical connections to the battery, and the cable(s) between cells on separate levels or racks, shall not put mechanical strain on the battery terminals. Terminal plates shall be used where practicable. Informational Note: Conductors are commonly pre-formed to eliminate stress on battery terminations. Fine stranded cables may also eliminate the stress on battery terminations. See the manufacturer's instructions for guidance. [480.4_(C)](https://2023.antflix.net#480.4_(C))", + "displayTitle": "(C) Battery Terminals", + "children": [], + "url": "https://2023.antflix.net#480.4_(C)" + }, + { + "body": "The terminals of all cells or multicell units shall be readily accessible for readings, inspections, and cleaning where required by the equipment design. One side of transparent battery containers shall be readily accessible for inspection of the internal components. [480.4_(D)](https://2023.antflix.net#480.4_(D))", + "displayTitle": "(D) Accessibility", + "children": [], + "url": "https://2023.antflix.net#480.4_(D)" + } + ], + "url": "https://2023.antflix.net#480.4" + }, + { + "body": "Wiring and equipment supplied from storage batteries shall be subject to the applicable provisions of this Code applying to wiring and equipment operating at the same voltage, unless otherwise permitted by 480.6. [480.5](https://2023.antflix.net#480.5)", + "displayTitle": "480.5 Wiring and Equipment Supplied From Batteries", + "children": [], + "url": "https://2023.antflix.net#480.5" + }, + { + "body": "Overcurrent protection shall not be required for conductors from a battery with a voltage of 60 volts dc or less if the battery provides power for starting, ignition, or control of prime movers. Section 300.3 shall not apply to these conductors. [480.6](https://2023.antflix.net#480.6)", + "displayTitle": "480.6 Overcurrent Protection for Prime Movers", + "children": [], + "url": "https://2023.antflix.net#480.6" + }, + { + "displayTitle": "480.7 DC Disconnect Methods", + "children": [ + { + "body": "A disconnecting means shall be provided for all ungrounded conductors derived from a stationary standby battery with a voltage over 60 volts dc. A disconnecting means shall be readily accessible and located within sight of the stationary standby battery. Informational Note: See 240.21 (H) for information on the location of the overcurrent device for battery conductors. [480.7_(A)](https://2023.antflix.net#480.7_(A))", + "displayTitle": "(A) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#480.7_(A)" + }, + { + "body": "For one-family and two-family dwellings, a disconnecting means or its remote control for a stationary standby battery shall be located at a readily accessible location outside the building for emergency use. The disconnect shall be labeled as follows: EMERGENCY DISCONNECT [480.7_(B)](https://2023.antflix.net#480.7_(B))", + "displayTitle": "(B) Emergency Disconnect", + "children": [], + "url": "https://2023.antflix.net#480.7_(B)" + }, + { + "body": "Battery circuits exceeding 240 volts dc nominal between conductors or to ground and subject to field servicing shall have provisions to disconnect the series-connected strings into segments not exceeding 240 volts dc nominal for maintenance by qualified persons. Non-load-break bolted or plug-in disconnects shall be permitted. [480.7_(C)](https://2023.antflix.net#480.7_(C))", + "displayTitle": "(C) Disconnection of Series Battery Circuits", + "children": [], + "url": "https://2023.antflix.net#480.7_(C)" + }, + { + "body": "Where a disconnecting means, located in accordance with 480.7(A), is provided with remote controls to activate the disconnecting means and the controls for the disconnecting means are not located within sight of the stationary standby battery, the disconnecting means shall be capable of being locked in the open position, in accordance with 110.25, and the location of the controls shall be field marked on the disconnecting means. [480.7_(D)](https://2023.antflix.net#480.7_(D))", + "displayTitle": "(D) Remote Actuation", + "children": [], + "url": "https://2023.antflix.net#480.7_(D)" + }, + { + "body": "Where a dc busway system is installed, the disconnecting means shall be permitted to be incorporated into the busway. [480.7_(E)](https://2023.antflix.net#480.7_(E))", + "displayTitle": "(E) Busway", + "children": [], + "url": "https://2023.antflix.net#480.7_(E)" + }, + { + "body": "The disconnecting means shall be legibly marked in the field. A label with the marking shall be placed in a conspicuous location near the battery if a disconnecting means is not provided. The marking shall be of sufficient durability to withstand the environment involved and shall include the following: Nominal battery voltageAvailable fault current derived from the stationary standby batteryInformational Note No. 1: Battery equipment suppliers can provide information about available fault current on specific battery models.An arc flash label in accordance with acceptable industry practiceInformational Note No. 2: See NFPA 70E-2021, Standard for Electrical Safety in the Workplace, for assistance in determining the severity of potential exposure, planning safe work practices, arc flash labeling, and selecting personal protective equipment.Date the calculation was performedException: List items (2), (3), and (4) shall not apply to one- and two-family dwellings. [480.7_(F)](https://2023.antflix.net#480.7_(F))", + "displayTitle": "(F) Notification", + "children": [], + "url": "https://2023.antflix.net#480.7_(F)" + }, + { + "body": "Stationary standby batteries shall be indicated by 480.7(G)(1) and (G)(2). [480.7_(G)](https://2023.antflix.net#480.7_(G))", + "displayTitle": "(G) Identification of Power Sources", + "children": [ + { + "body": "Plaques or directories shall be installed in accordance with 705.10. Exception: This requirement does not apply where a disconnect in 480.7(A) is not required. [480.7_(G)_(1)](https://2023.antflix.net#480.7_(G)_(1))", + "displayTitle": "(1) Facilities With Utility Services and Stationary Standby Batteries", + "children": [], + "url": "https://2023.antflix.net#480.7_(G)_(1)" + }, + { + "body": "A permanent plaque or directory shall be installed in accordance with 710.10. [480.7_(G)_(2)](https://2023.antflix.net#480.7_(G)_(2))", + "displayTitle": "(2) Facilities With Stand-Alone Systems", + "children": [], + "url": "https://2023.antflix.net#480.7_(G)_(2)" + } + ], + "url": "https://2023.antflix.net#480.7_(G)" + } + ], + "url": "https://2023.antflix.net#480.7" + }, + { + "body": "Batteries constructed of an electrically conductive container shall have insulating support if a voltage is present between the container and ground. [480.8](https://2023.antflix.net#480.8)", + "displayTitle": "480.8 Insulation of Batteries", + "children": [], + "url": "https://2023.antflix.net#480.8" + }, + { + "body": "For battery chemistries with corrosive electrolyte, the structure that supports the battery shall be resistant to deteriorating action by the electrolyte. Metallic structures shall be provided with nonconducting support members for the cells, or shall be constructed with a continuous insulating material. Paint alone shall not be considered as an insulating material. [480.9](https://2023.antflix.net#480.9)", + "displayTitle": "480.9 Battery Support Systems", + "children": [], + "url": "https://2023.antflix.net#480.9" + }, + { + "body": "Battery locations shall conform to 480.10(A) through (G). [480.10](https://2023.antflix.net#480.10)", + "displayTitle": "480.10 Battery Locations", + "children": [ + { + "body": "Provisions appropriate to the battery technology shall be made for sufficient diffusion and ventilation of gases from the battery, if present, to prevent the accumulation of an explosive mixture. Informational Note No. 1: See NFPA 1-2021, Fire Code, Chapter 52, for ventilation considerations for specific battery chemistries. Informational Note No. 2: Some battery technologies do not require ventilation. Informational Note No. 3: See IEEE Std 1635-2012/ASHRAE Guideline 21-2012, Guide for the Ventilation and Thermal Management of Batteries for Stationary Applications, for additional information on the ventilation of stationary battery systems. [480.10_(A)](https://2023.antflix.net#480.10_(A))", + "displayTitle": "(A) Ventilation", + "children": [], + "url": "https://2023.antflix.net#480.10_(A)" + }, + { + "body": "Guarding of live parts shall comply with 110.27. [480.10_(B)](https://2023.antflix.net#480.10_(B))", + "displayTitle": "(B) Live Parts", + "children": [], + "url": "https://2023.antflix.net#480.10_(B)" + }, + { + "body": "Spaces about stationary standby batteries shall comply with 110.26 and 110.34. Working space shall be measured from the edge of the battery cabinet, racks, or trays. For battery racks, there shall be a minimum clearance of 25 mm (1 in.) between a cell container and any wall or structure on the side not requiring access for maintenance. Battery stands shall be permitted to contact adjacent walls or structures, provided that the battery shelf has a free air space for not less than 90 percent of its length. Informational Note: Additional space is often needed to accommodate battery hoisting equipment, tray removal, or spill containment. [480.10_(C)](https://2023.antflix.net#480.10_(C))", + "displayTitle": "(C) Spaces About Stationary Standby Batteries", + "children": [], + "url": "https://2023.antflix.net#480.10_(C)" + }, + { + "body": "Where top terminal batteries are installed on tiered racks or on shelves of battery cabinets, working space in accordance with the battery manufacturer's instructions shall be provided between the highest point on a cell and the row, shelf, or ceiling above that point. Informational Note: See IEEE 1187-2013, IEEE Recommended Practice for Installation Design and Installation of Valve-Regulated Lead-Acid Batteries for Stationary Applications, for guidance for top clearance of valve-regulated lead-acid batteries, which are commonly used in battery cabinets. [480.10_(D)](https://2023.antflix.net#480.10_(D))", + "displayTitle": "(D) Top Terminal Batteries", + "children": [], + "url": "https://2023.antflix.net#480.10_(D)" + }, + { + "body": "Personnel doors intended for entrance to, and egress from, rooms designated as battery rooms shall open at least 90 degrees in the direction of egress and shall be equipped with listed panic or listed fire exit hardware. [480.10_(E)](https://2023.antflix.net#480.10_(E))", + "displayTitle": "(E) Egress", + "children": [], + "url": "https://2023.antflix.net#480.10_(E)" + }, + { + "body": "Gas piping shall not be permitted in dedicated battery rooms. [480.10_(F)](https://2023.antflix.net#480.10_(F))", + "displayTitle": "(F) Piping in Battery Rooms", + "children": [], + "url": "https://2023.antflix.net#480.10_(F)" + }, + { + "body": "Illumination shall be provided for working spaces containing stationary standby batteries. The lighting outlets shall not be controlled by automatic means only. Additional lighting outlets shall not be required where the work space is illuminated by an adjacent light source. The location of luminaires shall not result in the following: Expose personnel to energized battery components while performing maintenance on the luminaires in the battery spaceCreate a hazard to the battery upon failure of the luminaire [480.10_(G)](https://2023.antflix.net#480.10_(G))", + "displayTitle": "(G) Illumination", + "children": [], + "url": "https://2023.antflix.net#480.10_(G)" + } + ], + "url": "https://2023.antflix.net#480.10" + }, + { + "displayTitle": "480.11 Vents", + "children": [ + { + "body": "Each vented cell shall be equipped with a flame arrester. Informational Note: A flame arrester prevents destruction of the cell due to ignition of gases within the cell by an external spark or flame. [480.11_(A)](https://2023.antflix.net#480.11_(A))", + "displayTitle": "(A) Vented Cells", + "children": [], + "url": "https://2023.antflix.net#480.11_(A)" + }, + { + "body": "Where the battery is constructed such that an excessive accumulation of pressure could occur within the cell during operation, a pressure-release vent shall be provided. [480.11_(B)](https://2023.antflix.net#480.11_(B))", + "displayTitle": "(B) Sealed Cells", + "children": [], + "url": "https://2023.antflix.net#480.11_(B)" + } + ], + "url": "https://2023.antflix.net#480.11" + }, + { + "body": "Flexible cables, as identified in Table 400.4, in sizes 2/0 AWG and larger shall be permitted within the battery enclosure from battery terminals to a nearby junction box where they shall be connected to an approved wiring method. Flexible battery cables shall also be permitted between batteries and cells within the battery enclosure. Such cables shall be listed and identified for the environmental conditions. Flexible, fine-stranded cables shall only be used with terminals, lugs, devices, or connectors in accordance with 110.14. [480.12](https://2023.antflix.net#480.12)", + "displayTitle": "480.12 Battery Interconnections", + "children": [], + "url": "https://2023.antflix.net#480.12" + }, + { + "body": "Battery circuits exceeding 100 volts between the conductors or to ground shall be permitted to operate with ungrounded conductors, provided a ground-fault detector and indicator is installed to monitor for ground faults. [480.13](https://2023.antflix.net#480.13)", + "displayTitle": "480.13 Ground-Fault Detection", + "children": [], + "url": "https://2023.antflix.net#480.13" + } + ], + "url": "https://2023.antflix.net#480" + }, + { + "displayTitle": "Article 495 Equipment Over 1000 Volts AC, 1500 Volts DC, Nominal", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_72_I" + }, + { + "body": "This article covers the general requirements for equipment operating at more than 1000 volts ac, 1500 volts dc, nominal. Informational Note No. 1: See NFPA 70E-2021, Standard for Electrical Safety in the Workplace, for electrical safety requirements for employee workplaces. Informational Note No. 2: See ANSI Z535.4-2011, Product Signs and Safety Labels, for further information on hazard signs and labels. Informational Note No. 3: See IEEE 3001.5-2013, Recommended Practice for the Application of Power Distribution Apparatus in Industrial and Commercial Power Systems, for information regarding power distribution apparatus. [495.1](https://2023.antflix.net#495.1)", + "displayTitle": "495.1 Scope", + "children": [], + "url": "https://2023.antflix.net#495.1" + }, + { + "body": "Except as modified within this article, reconditioned equipment shall not be permitted. [495.2](https://2023.antflix.net#495.2)", + "displayTitle": "495.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#495.2" + }, + { + "displayTitle": "495.3 Other Articles", + "children": [ + { + "body": "Installation of electrical equipment containing more than 38 L (10 gal) of flammable oil per unit shall meet the requirements of Parts II and III of Article 450. [495.3_(A)](https://2023.antflix.net#495.3_(A))", + "displayTitle": "(A) Oil-Filled Equipment", + "children": [], + "url": "https://2023.antflix.net#495.3_(A)" + }, + { + "body": "Enclosures in damp or wet locations shall meet the requirements of 312.2. [495.3_(B)](https://2023.antflix.net#495.3_(B))", + "displayTitle": "(B) Enclosures in Damp or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#495.3_(B)" + } + ], + "url": "https://2023.antflix.net#495.3" + }, + { + "displayTitle": "Part II Equipment - Specific Provisions", + "children": [], + "url": "https://2023.antflix.net#divider_72_II" + }, + { + "body": "Means shall be provided to completely isolate an item of equipment from all ungrounded conductors. The use of isolating switches shall not be required where there are other ways of de-energizing the equipment for inspection and repairs, such as draw-out-type switchgear units and removable truck panels. Isolating switches not interlocked with an approved circuit-interrupting device shall be provided with a sign warning against opening them under load. The warning sign(s) or label(s) shall comply with 110.21(B). An identified fuseholder and fuse shall be permitted as an isolating switch. [495.22](https://2023.antflix.net#495.22)", + "displayTitle": "495.22 Isolating Means", + "children": [], + "url": "https://2023.antflix.net#495.22" + }, + { + "body": "Proper switching sequence for regulators shall be ensured by use of one of the following: Mechanically sequenced regulator bypass switch(es)Mechanical interlocksSwitching procedure prominently displayed at the switching location [495.23](https://2023.antflix.net#495.23)", + "displayTitle": "495.23 Voltage Regulators", + "children": [], + "url": "https://2023.antflix.net#495.23" + }, + { + "body": "In field-fabricated installations, the minimum air separation between bare live conductors and between such conductors and adjacent grounded surfaces shall not be less than the values given in Table 495.24. These values shall not apply to interior portions or exterior terminals of equipment designed, manufactured, and tested in accordance with accepted national standards. Table 495.24 Minimum Clearance of Live Parts Nominal Voltage Rating (kV) Impulse Withstand, Basic Impulse Level (BIL) (kV) Minimum Clearance of Live Parts Phase-to-Phase Phase-to-Ground Indoors Outdoors Indoors Outdoors Indoors Outdoors mm in. mm in. mm in. mm in. 2.4\u20144.16 60 95 115 4.5 180 7 80 3.0 155 6 7.2 75 95 140 5.5 180 7 105 4.0 155 6 13.8 95 110 195 7.5 305 12 130 5.0 180 7 14.4 110 110 230 9.0 305 12 170 6.5 180 7 23 125 150 270 10.5 385 15 190 7.5 255 10 34.5 150 150 320 12.5 385 15 245 9.5 255 10 200 200 460 18.0 460 18 335 13.0 335 13 46 - 200 - - 460 18 - - 335 13 - 250 - - 535 21 - - 435 17 69 - 250 - - 535 21 - - 435 17 - 350 - - 790 31 - - 635 25 115 - 550 - - 1350 53 - - 1070 42 138 - 550 - - 1350 53 - - 1070 42 - 650 - - 1605 63 - - 1270 50 161 - 650 - - 1605 63 - - 1270 50 - 750 - - 1830 72 - - 1475 58 230 - 750 - - 1830 72 - - 1475 58 - 900 - - 2265 89 - - 1805 71 - 1050 - - 2670 105 - - 2110 83 Note: The values given are the minimum clearance for rigid parts and bare conductors under favorable service conditions. They shall be increased for conductor movement or under unfavorable service conditions or wherever space limitations permit. The selection of the associated impulse withstand voltage for a particular system voltage is determined by the characteristics of the overvoltage (surge) protective equipment. [495.24](https://2023.antflix.net#495.24)", + "displayTitle": "495.24 Minimum Space Separation", + "children": [], + "url": "https://2023.antflix.net#495.24" + }, + { + "body": "Installations where the possibility of back-feed exists shall comply with 495.25(A) and (B). [495.25](https://2023.antflix.net#495.25)", + "displayTitle": "495.25 Backfeed", + "children": [ + { + "body": "A permanent sign in accordance with 110.21(B) shall be installed on the disconnecting means enclosure or immediately adjacent to open disconnecting means with the following words or equivalent: DANGER - CONTACTS ON EITHER SIDE OF THIS DEVICE MAY BE ENERGIZED BY BACKFEED. [495.25_(A)](https://2023.antflix.net#495.25_(A))", + "displayTitle": "(A) Sign", + "children": [], + "url": "https://2023.antflix.net#495.25_(A)" + }, + { + "body": "A permanent and legible single-line diagram of the local switching arrangement, clearly identifying each point of connection to the high-voltage section, shall be provided within sight of each point of connection. [495.25_(B)](https://2023.antflix.net#495.25_(B))", + "displayTitle": "(B) Diagram", + "children": [], + "url": "https://2023.antflix.net#495.25_(B)" + } + ], + "url": "https://2023.antflix.net#495.25" + }, + { + "displayTitle": "Part III Equipment - Switchgear and Industrial Control Assemblies", + "children": [], + "url": "https://2023.antflix.net#divider_63_III" + }, + { + "body": "Part III covers assemblies of switchgear and industrial control equipment, including, but not limited to, switches and interrupting devices and their control, metering, protection, and regulating equipment where they are an integral part of the assembly, with associated interconnections and supporting structures. [495.30](https://2023.antflix.net#495.30)", + "displayTitle": "495.30 General", + "children": [], + "url": "https://2023.antflix.net#495.30" + }, + { + "body": "Arrangement of devices in assemblies shall be such that individual components can safely perform their intended function without adversely affecting the safe operation of other components in the assembly. [495.31](https://2023.antflix.net#495.31)", + "displayTitle": "495.31 Arrangement of Devices in Assemblies", + "children": [], + "url": "https://2023.antflix.net#495.31" + }, + { + "body": "Where access for other than visual inspection is required to a compartment that contains energized high-voltage parts, barriers shall be provided to prevent accidental contact by persons, tools, or other equipment with energized parts. Exposed live parts shall only be permitted in compartments accessible to qualified persons. Fuses and fuseholders designed to enable future replacement without de-energizing the fuseholder shall only be permitted for use by qualified persons. [495.32](https://2023.antflix.net#495.32)", + "displayTitle": "495.32 Guarding of High-Voltage Energized Parts Within a Compartment", + "children": [], + "url": "https://2023.antflix.net#495.32" + }, + { + "body": "Energized bare parts mounted on doors shall be guarded where the door must be opened for maintenance of equipment or removal of draw-out equipment. [495.33](https://2023.antflix.net#495.33)", + "displayTitle": "495.33 Guarding of Energized Parts Operating at 1000 Volts, Nominal, or Less Within Compartments", + "children": [], + "url": "https://2023.antflix.net#495.33" + }, + { + "body": "The unobstructed space opposite terminals or opposite race-ways or cables entering a switchgear or control assembly shall be approved for the type of conductor and method of termination. [495.34](https://2023.antflix.net#495.34)", + "displayTitle": "495.34 Clearance for Cable Conductors Entering Enclosure", + "children": [], + "url": "https://2023.antflix.net#495.34" + }, + { + "displayTitle": "495.35 Accessibility of Energized Parts", + "children": [ + { + "body": "Doors that would provide unqualified persons access to high-voltage energized parts shall be locked. Permanent signs in accordance with 110.21(B) shall be installed on panels or doors that provide access to live parts over 1000 volts and shall read DANGER - HIGH VOLTAGE - KEEP OUT. [495.35_(A)](https://2023.antflix.net#495.35_(A))", + "displayTitle": "(A) High-Voltage Equipment", + "children": [], + "url": "https://2023.antflix.net#495.35_(A)" + }, + { + "body": "Where operating at 1000 volts, nominal, or less, control equipment, relays, motors, and the like shall not be installed in compartments with high-voltage parts or high-voltage wiring, unless both of the following apply: The access means is interlocked with the high-voltage switch or disconnecting means to prevent the access means from being opened or removed when the high-voltage switch is in the closed position or a withdrawable disconnecting means is in the connected position.All high-voltage parts or high-voltage wiring in the compartment that remains energized when a fixed mounted high-voltage switch is in the open position or a withdrawable disconnecting means is in the isolating (fully withdrawn) position are protected by insulating or grounded metal barriers to prevent accidental contact with energized high-voltage parts or wiring. [495.35_(B)](https://2023.antflix.net#495.35_(B))", + "displayTitle": "(B) Control Equipment", + "children": [], + "url": "https://2023.antflix.net#495.35_(B)" + }, + { + "body": "High-voltage instrument or control transformers and space heaters shall be permitted to be installed in the high-voltage compartment without access restrictions beyond those that apply to the high-voltage compartment generally. [495.35_(C)](https://2023.antflix.net#495.35_(C))", + "displayTitle": "(C) High-Voltage Instruments or Control Transformers and Space Heaters", + "children": [], + "url": "https://2023.antflix.net#495.35_(C)" + } + ], + "url": "https://2023.antflix.net#495.35" + }, + { + "body": "The metal cases or frames, or both, such as those of instruments, relays, meters, and instrument and control transformers, located in or on switchgear or control assemblies, and the frames of switchgear and control assemblies shall be connected to an equipment grounding conductor or, where permitted, the grounded conductor, in accordance with 250.190. [495.37](https://2023.antflix.net#495.37)", + "displayTitle": "495.37 Equipment Grounding Connections", + "children": [], + "url": "https://2023.antflix.net#495.37" + }, + { + "body": "External hinged doors or covers shall be provided with stops to hold them in the open position. Cover plates intended to be removed for inspection of energized parts or wiring shall be equipped with lifting handles and shall not exceed 1.1 nr (12 ft2) in area or 27 kg (60 lb) in weight, unless they are hinged and bolted or locked. [495.38](https://2023.antflix.net#495.38)", + "displayTitle": "495.38 Door Stops and Cover Plates", + "children": [], + "url": "https://2023.antflix.net#495.38" + }, + { + "body": "Gas discharged during operating of interrupting devices shall be directed so as not to endanger personnel. [495.39](https://2023.antflix.net#495.39)", + "displayTitle": "495.39 Gas Discharge From Interrupting Devices", + "children": [], + "url": "https://2023.antflix.net#495.39" + }, + { + "body": "Windows intended for visual inspection of disconnecting switches or other devices shall be of suitable transparent material. [495.40](https://2023.antflix.net#495.40)", + "displayTitle": "495.40 Visual Inspection Windows", + "children": [], + "url": "https://2023.antflix.net#495.40" + }, + { + "body": "Routinely operated industrial control equipment shall meet the requirements of 495.41 (A) unless infrequently operated, as covered in 495.41 (B). [495.41](https://2023.antflix.net#495.41)", + "displayTitle": "495.41 Location of Industrial Control Equipment", + "children": [ + { + "body": "Control and instrument transfer switch handles or push buttons shall be in a readily accessible location at an elevation of not over 2.0 m (6 ft 7 in.). Exception: Operating handles requiring more than 23 kg (50 lb) of force shall be located no higher than 1.7 m (66 in.) in either the open or closed position. [495.41_(A)](https://2023.antflix.net#495.41_(A))", + "displayTitle": "(A) Control and Instrument Transfer Switch Handles or Push Buttons", + "children": [], + "url": "https://2023.antflix.net#495.41_(A)" + }, + { + "body": "Where operating handles for such devices as draw-out fuses, fused potential or control transformers and their primary disconnects, and bus transfer and isolating switches are only operated infrequently, the handles shall be permitted to be located where they are safely operable and serviceable from a portable platform. [495.41_(B)](https://2023.antflix.net#495.41_(B))", + "displayTitle": "(B) Infrequently Operated Devices", + "children": [], + "url": "https://2023.antflix.net#495.41_(B)" + } + ], + "url": "https://2023.antflix.net#495.41" + }, + { + "body": "Interrupter switches equipped with stored energy mechanisms shall have mechanical interlocks to prevent access to the switch compartment unless the stored energy mechanism is in the discharged or blocked position. [495.42](https://2023.antflix.net#495.42)", + "displayTitle": "495.42 Interlocks - Interrupter Switches", + "children": [], + "url": "https://2023.antflix.net#495.42" + }, + { + "body": "The stored energy operator shall be permitted to be left in the uncharged position after the switch has been closed if a single movement of the operating handle charges the operator and opens the switch. [495.43](https://2023.antflix.net#495.43)", + "displayTitle": "495.43 Stored Energy for Opening", + "children": [], + "url": "https://2023.antflix.net#495.43" + }, + { + "displayTitle": "495.44 Fused Interrupter Switches", + "children": [ + { + "body": "The supply terminals of fused interrupter switches shall be installed at the top of the switch enclosure or, if the terminals are located elsewhere, the equipment shall have barriers installed to prevent persons from accidentally contacting energized parts or dropping tools or fuses into energized parts. [495.44_(A)](https://2023.antflix.net#495.44_(A))", + "displayTitle": "(A) Supply Terminals", + "children": [], + "url": "https://2023.antflix.net#495.44_(A)" + }, + { + "body": "Where fuses can be energized by backfeed, a sign shall be placed on the enclosure door identifying this hazard. [495.44_(B)](https://2023.antflix.net#495.44_(B))", + "displayTitle": "(B) Backfeed", + "children": [], + "url": "https://2023.antflix.net#495.44_(B)" + }, + { + "body": "The switching mechanism shall be arranged to be operated from a location outside the enclosure where the operator is not exposed to energized parts and shall be arranged to open all ungrounded conductors of the circuit simultaneously with one operation. Switches shall be lockable open in accordance with 110.25. [495.44_(C)](https://2023.antflix.net#495.44_(C))", + "displayTitle": "(C) Switching Mechanism", + "children": [], + "url": "https://2023.antflix.net#495.44_(C)" + } + ], + "url": "https://2023.antflix.net#495.44" + }, + { + "displayTitle": "495.45 Circuit Breakers - Interlocks", + "children": [ + { + "body": "Circuit breakers equipped with stored energy mechanisms shall be designed to prevent the release of the stored energy unless the mechanism has been fully charged. [495.45_(A)](https://2023.antflix.net#495.45_(A))", + "displayTitle": "(A) Circuit Breakers", + "children": [], + "url": "https://2023.antflix.net#495.45_(A)" + }, + { + "body": "Mechanical interlocks shall be provided in the housing to prevent the complete withdrawal of the circuit breaker from the housing when the stored energy mechanism is in the fully charged position, unless a suitable device is provided to block the closing function of the circuit breaker before complete withdrawal. [495.45_(B)](https://2023.antflix.net#495.45_(B))", + "displayTitle": "(B) Mechanical Interlocks", + "children": [], + "url": "https://2023.antflix.net#495.45_(B)" + } + ], + "url": "https://2023.antflix.net#495.45" + }, + { + "body": "Circuit breakers shall be capable of being locked in the open position or, if they are installed in a draw-out mechanism, that mechanism shall be capable of being locked in such a position that the mechanism cannot be moved into the connected position. In either case, the provision for locking shall be lockable open in accordance with 110.25. [495.46](https://2023.antflix.net#495.46)", + "displayTitle": "495.46 Circuit Breaker Locking", + "children": [], + "url": "https://2023.antflix.net#495.46" + }, + { + "body": "Switchgear installed as high-voltage service equipment shall include a ground bus for the connection of service cable shields and to facilitate the attachment of safety grounds for personnel protection. This bus shall be extended into the compartment where the service conductors are terminated. Where the compartment door or panel provides access to parts that can only be de-energized and visibly isolated by the serving utility, the warning sign required by 495.35(A) shall include a notice that access is limited to the serving utility or is permitted only following an authorization of the serving utility. [495.47](https://2023.antflix.net#495.47)", + "displayTitle": "495.47 Switchgear Used as Service Equipment", + "children": [], + "url": "https://2023.antflix.net#495.47" + }, + { + "displayTitle": "495.48 Substation Design, Documentation, and Required Diagram", + "children": [ + { + "body": "Substations shall be designed by a qualified licensed professional engineer. Where components or the entirety of the substation is listed by a qualified electrical testing laboratory, documentation of internal design features subject to the listing investigation shall not be required. The design shall address but not be limited to the following topics, and the documentation of this design shall be made available to the authority having jurisdiction: Clearances and exitsElectrical enclosuresSecuring and support of electrical equipmentFire protectionSafety ground connection provisionsGuarding live partsTransformers and voltage regulation equipmentConductor insulation, electrical and mechanical protection, isolation, and terminationsApplication, arrangement, and disconnection of circuit breakers, switches, and fusesProvisions for oil-filled equipmentSwitchgearOvervoltage (surge) protection equipment [495.48_(A)](https://2023.antflix.net#495.48_(A))", + "displayTitle": "(A) Design and Documentation", + "children": [], + "url": "https://2023.antflix.net#495.48_(A)" + }, + { + "body": "A permanent, single-line diagram of the switchgear shall be provided in a readily visible location within the same room or enclosed area with the switchgear and shall clearly identify the following: InterlocksIsolation meansAll possible sources of voltage to the installation under normal or emergency conditionsThe marking on the switchgear shall cross-reference the diagram.Exception: Where the equipment consists solely of a single cubicle or metal-enclosed substation containing only one high-voltage, switching device, diagrams shall not be required. [495.48_(B)](https://2023.antflix.net#495.48_(B))", + "displayTitle": "(B) Diagram", + "children": [], + "url": "https://2023.antflix.net#495.48_(B)" + } + ], + "url": "https://2023.antflix.net#495.48" + }, + { + "body": "Reconditioned switchgear, or sections of switchgear, shall be permitted. If equipment has been damaged by fire, products of combustion, or water, it shall be specifically evaluated by its manufacturer or a qualified testing laboratory prior to being returned to service. [495.49](https://2023.antflix.net#495.49)", + "displayTitle": "495.49 Reconditioned Switchgear", + "children": [], + "url": "https://2023.antflix.net#495.49" + }, + { + "displayTitle": "Part IV Mobile and Portable Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_19_IV" + }, + { + "displayTitle": "495.61 General", + "children": [ + { + "body": "The provisions of this part shall apply to installations and use of high-voltage power distribution and utilization equipment that is portable, mobile, or both, and include but not be limited to the following: Substations and switch houses mounted on skidsTrailers or carsMobile shovelsDraglinesCranesHoistsDrillsDredgesCompressorsPumpsConveyorsUnderground excavators [495.61_(A)](https://2023.antflix.net#495.61_(A))", + "displayTitle": "(A) Covered", + "children": [], + "url": "https://2023.antflix.net#495.61_(A)" + }, + { + "body": "Grounding and bonding shall be in accordance with Part X of Article 250. [495.61_(B)](https://2023.antflix.net#495.61_(B))", + "displayTitle": "(B) Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#495.61_(B)" + }, + { + "body": "Approved enclosures or guarding, or both, shall be provided to protect portable and mobile equipment from physical damage. [495.61_(C)](https://2023.antflix.net#495.61_(C))", + "displayTitle": "(C) Protection", + "children": [], + "url": "https://2023.antflix.net#495.61_(C)" + }, + { + "body": "Disconnecting means shall be installed for mobile and portable high-voltage equipment according to the requirements of Part VIII of Article 230 and shall disconnect all ungrounded conductors. [495.61_(D)](https://2023.antflix.net#495.61_(D))", + "displayTitle": "(D) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#495.61_(D)" + } + ], + "url": "https://2023.antflix.net#495.61" + }, + { + "body": "Motors driving single or multiple dc generators supplying a system operating on a cyclic load basis shall not require overload protection if the thermal rating of the ac drive motor cannot be exceeded under any operating condition. The branch-circuit protective device(s) shall provide short-circuit and locked-rotor protection and shall be permitted to be external to the equipment. [495.62](https://2023.antflix.net#495.62)", + "displayTitle": "495.62 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#495.62" + }, + { + "body": "All energized switching and control parts shall be enclosed in grounded metal cabinets or enclosures. These cabinets or enclosures shall be marked DANGER - HIGH VOLTAGE - KEEP OUT and shall be locked so that only authorized and qualified persons can enter. The danger marking(s) or label(s) shall comply with 110.21(B). Circuit breakers and protective equipment shall have the operating means projecting through the metal cabinet or enclosure so these units can be reset without opening locked doors. With doors closed, safe access for normal operation of these units shall be provided. [495.63](https://2023.antflix.net#495.63)", + "displayTitle": "495.63 Enclosures", + "children": [], + "url": "https://2023.antflix.net#495.63" + }, + { + "body": "The collector ring assemblies on revolving-type machines (shovels, draglines, etc.) shall be guarded to prevent accidental contact with energized parts by personnel on or off the machine. [495.64](https://2023.antflix.net#495.64)", + "displayTitle": "495.64 Collector Rings", + "children": [], + "url": "https://2023.antflix.net#495.64" + }, + { + "body": "A metallic enclosure shall be provided on the mobile machine for enclosing the terminals of the power cable. The enclosure shall include terminal connections to the machine frame for the equipment grounding conductor. Ungrounded conductors shall be attached to insulators or be terminated in approved high-voltage cable couplers (which include equipment grounding conductor connectors) of proper voltage and ampere rating. The method of cable termination used shall prevent any strain or pull on the cable from stressing the electrical connections. The enclosure shall have provision for locking so that only authorized and qualified persons can open it and shall be marked as follows: DANGER - HIGH VOLTAGE - KEEP OUT. The danger marking(s) or label(s) shall comply with 110.21(B). [495.65](https://2023.antflix.net#495.65)", + "displayTitle": "495.65 Power Cable Connections to Mobile Machines", + "children": [], + "url": "https://2023.antflix.net#495.65" + }, + { + "body": "Flexible high-voltage cable supplying power to portable or mobile equipment shall comply with the grounding and bonding requirements in Parts V, VI, and X of Article 250 and the flexible cable requirements in Part III of Article 400. [495.66](https://2023.antflix.net#495.66)", + "displayTitle": "495.66 High-Voltage Portable Cable for Main Power Supply", + "children": [], + "url": "https://2023.antflix.net#495.66" + }, + { + "displayTitle": "Part V Boilers", + "children": [], + "url": "https://2023.antflix.net#divider_14_V" + }, + { + "body": "The provisions of Part V shall apply to boilers operating over 1000 volts, nominal, in which heat is generated by the passage of current between electrodes through the liquid being heated. [495.70](https://2023.antflix.net#495.70)", + "displayTitle": "495.70 General", + "children": [], + "url": "https://2023.antflix.net#495.70" + }, + { + "body": "Boilers shall be supplied only from a 3-phase, 4-wire solidly grounded wye system, or from isolating transformers arranged to provide such a system. Control circuit voltages shall not exceed 150 volts, shall be supplied from a grounded system, and shall have the controls in the ungrounded conductor. [495.71](https://2023.antflix.net#495.71)", + "displayTitle": "495.71 Electrical Supply System", + "children": [], + "url": "https://2023.antflix.net#495.71" + }, + { + "displayTitle": "495.72 Branch-Circuit Requirements", + "children": [ + { + "body": "Each boiler shall be supplied from an individual branch circuit rated not less than 100 percent of the total load. [495.72_(A)](https://2023.antflix.net#495.72_(A))", + "displayTitle": "(A) Rating", + "children": [], + "url": "https://2023.antflix.net#495.72_(A)" + }, + { + "body": "The circuit shall be protected by a 3-phase, common-trip fault-interrupting device, which shall be permitted to automatically reclose the circuit upon removal of an overload condition but shall not reclose after a fault condition. [495.72_(B)](https://2023.antflix.net#495.72_(B))", + "displayTitle": "(B) Common-Trip Fault-Interrupting Device", + "children": [], + "url": "https://2023.antflix.net#495.72_(B)" + }, + { + "body": "Phase-fault protection shall be provided in each phase, consisting of a separate phase-overcurrent relay connected to a separate current transformer in the phase. [495.72_(C)](https://2023.antflix.net#495.72_(C))", + "displayTitle": "(C) Phase-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#495.72_(C)" + }, + { + "body": "Means shall be provided for detection of the sum of the neutral conductor and equipment grounding conductor currents and shall trip the circuit-interrupting device if the sum of those currents exceeds the greater of 5 amperes or 7 1/2 percent of the boiler full-load current for 10 seconds or exceeds an instantaneous value of 25 percent of the boiler full-load current. [495.72_(D)](https://2023.antflix.net#495.72_(D))", + "displayTitle": "(D) Ground Current Detection", + "children": [], + "url": "https://2023.antflix.net#495.72_(D)" + }, + { + "body": "The grounded neutral conductor shall be as follows: Connected to the pressure vessel containing the heating elementsInsulated for not less than 1000 voltsHave not less than the ampacity of the largest ungrounded branch-circuit conductorInstalled with the ungrounded conductors in the same raceway, cable, or cable tray, or, where installed as open conductors, in close proximity to the ungrounded conductorsNot used for any other circuit [495.72_(E)](https://2023.antflix.net#495.72_(E))", + "displayTitle": "(E) Grounded Neutral Conductor", + "children": [], + "url": "https://2023.antflix.net#495.72_(E)" + } + ], + "url": "https://2023.antflix.net#495.72" + }, + { + "body": "Each boiler shall be equipped with a means to limit the maximum temperature, pressure, or both, by directly or indirectly interrupting all current flow through the heating elements. Such means shall be in addition to the temperature, pressure, or both, regulating systems and pressure relief or safety valves. [495.73](https://2023.antflix.net#495.73)", + "displayTitle": "495.73 Pressure and Temperature Limit Control", + "children": [], + "url": "https://2023.antflix.net#495.73" + }, + { + "body": "All exposed non-current-carrying metal parts of the boiler and associated exposed metal structures or equipment shall be bonded to the pressure vessel or to the neutral conductor to which the vessel is connected in accordance with 250.102, except the ampacity of the bonding jumper shall not be less than the ampacity of the neutral conductor. [495.74](https://2023.antflix.net#495.74)", + "displayTitle": "495.74 Bonding", + "children": [], + "url": "https://2023.antflix.net#495.74" + } + ], + "url": "https://2023.antflix.net#495" + } + ], + "url": "https://2023.antflix.net#4" + } + ], + "Chaptewr 5 Special Occupancies": [ + { + "displayTitle": "Chapter 5 Special Occupancies", + "children": [ + { + "displayTitle": "Article 500 Hazardous (Classified) Locations, Classes I, II, and III, Divisions 1 and 2", + "children": [ + { + "displayTitle": "500.1 Scope", + "children": [ + { + "body": "This article covers area classification and general requirements for electrical and electronic equipment and wiring rated at all voltages where fire or explosion hazards might exist due to flammable gases, flammable liquid\u2014produced vapors, combustible liquid\u2014produced vapors, combustible dusts, combustible fibers/flyings, or ignitible fibers/flyings in the following: Class I, Division 1 or Class I, Division 2 hazardous (classified) locationsClass II, Division 1 or Class II, Division 2 hazardous (classified) locationsClass III, Division 1 or Class III, Division 2 hazardous (classified) locationsInformational Note No. 1: See NFPA 497, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, and NFPA 499, Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, for extracted information referenced in brackets. Only editorial changes were made to the extracted text to make it consistent with this Code.Informational Note No. 2: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations]. [500.1_(A)](https://2023.antflix.net#500.1_(A))", + "displayTitle": "(A) Covered", + "children": [], + "url": "https://2023.antflix.net#500.1_(A)" + }, + { + "body": "This article does not cover electrical and electronic equipment and wiring rated at all voltages for the following: Zone 0, Zone 1, or Zone 2 hazardous (classified) locationsZone 20, Zone 21, or Zone 22 hazardous (classified) locationsLocations subject to the unique risk and explosion hazards associated with explosives, pyrotechnics, and blasting agentsLocations where pyrophoric materials are the only materials used or handledFeatures of equipment that involve nonelectrical potential sources of ignition (e.g., couplings, pumps, gearboxes, brakes, hydraulic and pneumatic motors, fans, engines, compressors)Informational Note No. 1: Common nonelectrical potential sources of ignition include hot surfaces and mechanically generated sparks.Informational Note No. 2: See ANSI/UL 80079-36, Explosive Atmospheres - Part 36: Non-Electrical Equipment for Explosive Atmospheres - Basic Method and Requirements, and ANSI/UL 80079-37, Explosive Atmospheres - Part 37: Non-Electrical Equipment for Explosive Atmospheres - Non-Electrical Type of Protection Constructional Safety \"c\" Control of Ignition Source \"b\", Liquid Immersion \"k\", for additional information. [500.1_(B)](https://2023.antflix.net#500.1_(B))", + "displayTitle": "(B) Not Covered", + "children": [], + "url": "https://2023.antflix.net#500.1_(B)" + } + ], + "url": "https://2023.antflix.net#500.1" + }, + { + "body": "Areas designated as hazardous (classified) locations or determined to be unclassified shall be documented on an area classification drawing and other associated documentation. This documentation shall be available to the authority having jurisdiction (AHJ) and those authorized to design, install, inspect, maintain, or operate electrical equipment at the location. Informational Note No. 1: See the following standards for additional information on the classification of locations:NFPA 30, Flammable and Combustible Liquids CodeNFPA 32, Standard for Drycleaning FacilitiesNFPA 33, Standard for Spray Application Using Flammable or Combustible MaterialsNFPA 34, Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible LiquidsNFPA 35, Standard for the Manufacture of Organic CoatingsNFPA 36, Standard for Solvent Extraction PlantsNFPA 45, Standard on Fire Protection for Laboratories Using ChemicalsNFPA 55, Compressed Gases and Cryogenic Fluids CodeNFPA 58, Liquefied Petroleum Gas CodeNFPA 59, Utility LP-Gas Plant CodeNFPA 497, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process AreasNFPA 499, Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process AreasNFPA 820, Standard for Fire Protection in Wastewater Treatment and Collection FacilitiesANSI/API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2ISA-12.10, Area Classification in Hazardous (Classified) Dust LocationsInformational Note No. 2: See NFPA 77, Recommended Practice on Static Electricity, NFPA 780, Standard for the Installation of Lightning Protection Systems; and API RP 2003, Protection Against Ignitions Arising Out of Static, Lightning, and Stray Currents, for information on protection against static electricity and lightning hazards in hazardous (classified) locations.Informational Note No. 3: See NFPA 30, Flammable and Combustible Liquids Code; and ANSI/API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2, for information on ventilation.Informational Note No. 4: See ANSI/API RP 14F, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Division 1, and Division 2 Locations, for information on electrical systems for hazardous (classified) locations on offshore oil- and gas-producing platforms, drilling rigs, and workover rigs.Informational Note No. 5: See ANSI/UL 121203, Portable/Personal Electronic Products Suitable for Use in Class I, Division 2, Class I, Zone 2, Class II, Division 2, Class III, Division 1, Class III, Division 2, Zone 21 and Zone 22 Hazardous (Classified) Locations, for information on portable or transportable equipment having self-contained power supplies, such as battery-operated equipment, which could potentially become an ignition source in hazardous (classified) locations.Informational Note No. 6: See IEC/IEEE 60079-30-2, Explosive atmospheres - Part 30-2: Electrical resistance trace heating - Application guide for design, installation and maintenance, for information on electrical resistance trace heating for hazardous (classified) locations.Informational Note No. 7: See IEEE 844.2/CSA C293.2, IEEE/CSA Standard for Skin Effect Trace Heating of Pipelines, Vessels, Equipment, and Structures - Application Guide for Design, Installation, Testing, Commissioning, and Maintenance, for information on electric skin effect trace heating for hazardous (classified) locations.Informational Note No. 8: See IEEE 844.4/CSA C293.4, IEEE/CSA Standard for Impedance Heating of Pipelines and Equipment - Application Guide for Design, Installation, Testing, Commissioning, and Maintenance, for information on electric impedance heating for hazardous (classified) locations. [500.4](https://2023.antflix.net#500.4)", + "displayTitle": "500.4 Documentation", + "children": [], + "url": "https://2023.antflix.net#500.4" + }, + { + "displayTitle": "500.5 Classifications of Locations", + "children": [ + { + "displayTitle": "(A) General", + "children": [ + { + "body": "Locations shall be classified depending on the properties of the flammable gas, flammable liquid\u2014produced vapor, combustible liquid\u2014produced vapors, combustible dusts, or fibers/flyings that could be present, and the likelihood that a flammable or combustible concentration or quantity is present. Each room, section, or area shall be considered individually in determining its classification. Informational Note: Through the exercise of ingenuity in the layout of electrical installations for hazardous (classified) locations, it is frequently possible to locate much of the equipment in a reduced level of classification or in an unclassified location to reduce the amount of special equipment required. [500.5_(A)_(1)](https://2023.antflix.net#500.5_(A)_(1))", + "displayTitle": "(1) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#500.5_(A)_(1)" + }, + { + "body": "Refrigerant machinery rooms that contain ammonia refrigeration systems and are equipped with adequate mechanical ventilation that operates continuously or is initiated by a detection system at a concentration not exceeding 150 ppm shall be permitted to be classified as \"unclassified\" locations. Informational Note: See ANSI/IIAR 2, Standard for Design of Safe Closed-Circuit Ammonia Refrigeration Systems, for information on classification and ventilation of areas involving closed-circuit ammonia refrigeration systems. [500.5_(A)_(2)](https://2023.antflix.net#500.5_(A)_(2))", + "displayTitle": "(2) Refrigerant Machinery Rooms Using Ammonia", + "children": [], + "url": "https://2023.antflix.net#500.5_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#500.5_(A)" + }, + { + "body": "Class I locations are those in which flammable gases, flammable liquid\u2014produced vapors, or combustible liquid\u2014produced vapors are or may be present in the air in quantities sufficient to produce explosive or ignitible mixtures. Class I locations shall include those specified in 500.5(B)(1) and (B)(2). [500.5_(B)](https://2023.antflix.net#500.5_(B))", + "displayTitle": "(B) Class I Locations", + "children": [ + { + "body": "A Class I, Division 1 location is a location: In which ignitible concentrations of flammable gases, flammable liquid\u2014produced vapors, or combustible liquid\u2014produced vapors can exist under normal operating conditions, orIn which ignitible concentrations of such flammable gases, flammable liquid\u2014produced vapors, or combustible liquids above their flash points might exist frequently because of repair or maintenance operations or because of leakage, orIn which breakdown or faulty operation of equipment or processes might release ignitible concentrations of flammable gases, flammable liquid\u2014produced vapors, or combustible liquid\u2014produced vapors and might also cause simultaneous failure of electrical equipment in such a way as to directly cause the electrical equipment to become a source of ignitionInformational Note: This classification usually includes the following locations:Where volatile flammable liquids or liquefied flammable gases are transferred from one container to anotherInteriors of spray booths and areas in the vicinity of spraying and painting operations where volatile flammable solvents are usedLocations containing open tanks or vats of volatile flammable liquidsDrying rooms or compartments for the evaporation of flammable solventsLocations containing fat- and oil-extraction equipment using volatile flammable solventsPortions of cleaning and dyeing plants where flammable liquids are usedGas generator rooms and other portions of gas manufacturing plants where flammable gas might escapeInadequately ventilated pump rooms for flammable gas or for volatile flammable liquidsInteriors of refrigerators and freezers in which volatile flammable materials are stored in open, lightly stoppered, or easily ruptured containersInside of inadequately vented enclosures containing instruments normally venting flammable gases or vapors to the interior of the enclosureInside of vented tanks containing volatile flammable liquidsArea between inner and outer roof sections of floating roof tanks containing volatile flammable fluidsInadequately ventilated areas within spraying or coating operations using volatile flammable fluidsInterior of exhaust ducts used to vent ignitible concentrations of gases or vaporsAll other locations where ignitible concentrations of flammable vapors or gases are likely to occur during normal operationsExperience has demonstrated the prudence of avoiding the installation of instrumentation or other electrical equipment in the areas covered in list items (11) through (15). Where it cannot be avoided because it is essential to the process and other locations are not feasible electrical equipment or instrumentation approved for the specific application or consisting of intrinsically safe systems might be considered. [500.5_(B)_(1)](https://2023.antflix.net#500.5_(B)_(1))", + "displayTitle": "(1) Class I, Division 1", + "children": [], + "url": "https://2023.antflix.net#500.5_(B)_(1)" + }, + { + "body": "A Class I, Division 2 location is a location: In which volatile flammable gases, flammable liquid-produced vapors, or combustible liquid\u2014produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment, orIn which ignitible concentrations of flammable gases, flammable liquid\u2014produced vapors, or combustible liquid\u2014produced vapors are normally prevented by positive mechanical ventilation and which might become hazardous through failure or abnormal operation of the ventilating equipment, orThat is adjacent to a Class I, Division 1 location, and to which ignitible concentrations of flammable gases, flammable liquid\u2014produced vapors, or combustible liquid-produced vapors above their flash points might occasionally be communicated unless such communication is prevented by adequate positive-pressure ventilation from a source of clean air and effective safeguards against ventilation failure are provided.Informational Note No. 1: This classification usually includes locations where volatile flammable liquids or flammable gases or vapors are used but that, in the judgment of the authority having jurisdiction, would become hazardous only in case of an accident or of some unusual operating condition. The quantity of flammable material that might escape in case of accident, the adequacy of ventilating equipment, the total area involved, and the record of the industry or business with respect to explosions or fires are all factors that merit consideration in determining the classification and extent of each location.Informational Note No. 2: See NFPA 30, Flammable and Combustible Liquids Code, and NFPA 58, Liquefied Petroleum Gas Code. Piping without valves, checks, meters, and similar devices would not ordinarily introduce a hazardous condition even if used for flammable liquids or gases. Depending on factors such as the quantity and size of the containers and ventilation, locations used for the storage of flammable liquids or liquefied or compressed gases in sealed containers might be considered either hazardous (classified) or unclassified locations. [500.5_(B)_(2)](https://2023.antflix.net#500.5_(B)_(2))", + "displayTitle": "(2) Class I, Division 2", + "children": [], + "url": "https://2023.antflix.net#500.5_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#500.5_(B)" + }, + { + "body": "Class II locations are those that are hazardous because of the presence of combustible dust. Class II locations shall include those specified in 500.5(C)(1) and (C)(2). [500.5_(C)](https://2023.antflix.net#500.5_(C))", + "displayTitle": "(C) Class II Locations", + "children": [ + { + "body": "A Class II, Division 1 location is a location: In which combustible dust is in the air under normal operating conditions in quantities sufficient to produce explosive or ignitible mixtures, orWhere mechanical failure or abnormal operation of machinery or equipment might cause such explosive or ignitible mixtures to be produced, and might also provide a source of ignition through simultaneous failure of electrical equipment, through operation of protection devices, or from other causes, orIn which Group E combustible dusts may be present in quantities sufficient to be hazardous in normal or abnormal operating conditions.Informational Note: Dusts containing magnesium or aluminum are particularly hazardous, and the use of extreme precaution is necessary to avoid ignition and explosion. [500.5_(C)_(1)](https://2023.antflix.net#500.5_(C)_(1))", + "displayTitle": "(1) Class II, Division 1", + "children": [], + "url": "https://2023.antflix.net#500.5_(C)_(1)" + }, + { + "body": "A Class II, Division 2 location is a location: In which combustible dust due to abnormal operations may be present in the air in quantities sufficient to produce explosive or ignitible mixtures; orWhere combustible dust accumulations are present but are normally insufficient to interfere with the normal operation of electrical equipment or other apparatus, but could as a result of infrequent malfunctioning of handling or processing equipment become suspended in the air; orIn which combustible dust accumulations on, in, or in the vicinity of the electrical equipment could be sufficient to interfere with the safe dissipation of heat from electrical equipment, or could be ignitible by abnormal operation or failure of electrical equipment.Informational Note No. 1: The quantity of combustible dust that may be present and the adequacy of dust removal systems are factors that merit consideration in determining the classification and may result in an unclassified area.Informational Note No. 2: Where products such as seed are handled in a manner that produces low quantities of dust, the amount of dust deposited may not warrant classification. [500.5_(C)_(2)](https://2023.antflix.net#500.5_(C)_(2))", + "displayTitle": "(2) Class II, Division 2", + "children": [], + "url": "https://2023.antflix.net#500.5_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#500.5_(C)" + }, + { + "body": "Class III locations shall be locations meeting the requirements of 500.5(D)(1) and (D)(2). [500.5_(D)](https://2023.antflix.net#500.5_(D))", + "displayTitle": "(D) Class III Locations", + "children": [ + { + "body": "Class III, Division 1 locations shall include those locations specified in 500.5(D)(1)(a) and (D)(1)(b). Combustible Fibers/Flyings. Locations where nonmetal combustible fibers/flyings are in the air under normal operating conditions in quantities sufficient to produce explosible mixtures or where mechanical failure or abnormal operation of machinery or equipment might cause combustible fibers/flyings to be produced and might also provide a source of ignition through simultaneous failure of electrical equipment, through operation of protection devices, or from other causes shall be classified as Class III, Division 1. Locations where metal combustible fibers/flyings are present shall be classified as Class II, Division 1, Group E.Informational Note No. 1: Such locations usually include some parts of rayon, cotton, and other textile mills; associated manufacturing and processing plants; cotton gins and cottonseed mills; flax-processing plants; clothing manufacturing plants; woodworking plants; and establishments and industries involving similar hazardous processes or conditions.Informational Note No. 2: Combustible fibers/flyings include flat platelet-shaped particulates, such as metal flakes, and fibrous board, such as particle board.Ignitible Fibers/Flyings. Locations where ignitible fibers/flyings are handled, manufactured, or used shall be classified as Class III, Division 1.Informational Note No. 1: Such locations usually include some parts of rayon, cotton, and other textile mills; associated manufacturing and processing plants; cotton gins and cotton-seed mills; flax-processing plants; clothing manufacturing plants; woodworking plants; and establishments and industries involving similar hazardous processes or conditions.Informational Note No. 2: Ignitible fibers/flyings can include rayon, cotton (including cotton linters and cotton waste), sisal or henequen, istle, jute, hemp, tow, cocoa fiber, oakum, baled waste kapok, Spanish moss, excelsior, and other materials of similar nature. [500.5_(D)_(1)](https://2023.antflix.net#500.5_(D)_(1))", + "displayTitle": "(1) Class III, Division 1", + "children": [], + "url": "https://2023.antflix.net#500.5_(D)_(1)" + }, + { + "body": "Class III, Division 2 locations shall include those locations specified in 500.5(D)(2)(a) and (D)(2)(b). Combustible Fibers/Flyings. Locations where nonmetal combustible fibers/flyings might be present in the air in quantities sufficient to produce explosible mixtures due to abnormal operations or where accumulations of nonmetal combustible fibers/flyings accumulations are present but are insufficient to interfere with the normal operation of electrical equipment or other apparatus but could, as a result of infrequent malfunctioning of handling or processing equipment, become suspended in the air shall be classified as Class III, Division 2.Ignitible Fibers/Flyings. Locations where ignitible fibers/flyings are stored or handled, other than in the process of manufacture, shall be classified as Class III, Division 2. [500.5_(D)_(2)](https://2023.antflix.net#500.5_(D)_(2))", + "displayTitle": "(2) Class III, Division 2", + "children": [], + "url": "https://2023.antflix.net#500.5_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#500.5_(D)" + } + ], + "url": "https://2023.antflix.net#500.5" + }, + { + "displayTitle": "500.6 Materials", + "children": [ + { + "body": "Class I groups shall be in accordance with 500.6(A)(1) through (A)(4). Informational Note No. 1: The explosion characteristics of air mixtures of gases or vapors vary with the specific material involved. For Class I locations, Groups A, B, C, and D, the classification involves determinations of maximum explosion pressure and maximum safe clearance between parts of a clamped joint in an enclosure. It is necessary, therefore, that equipment be identified not only for class but also for the specific group of the gas or vapor that will be present. Informational Note No. 2: Certain chemical atmospheres may have characteristics that require safeguards beyond those required for any of the Class I groups. Carbon disulfide is one of these chemicals because of its low autoignition temperature (90\u00b0C) and the small joint clearance permitted to arrest its flame. [500.6_(A)](https://2023.antflix.net#500.6_(A))", + "displayTitle": "(A) Class I Group Classifications", + "children": [ + { + "body": "Acetylene. [497:3.3.5.1.1] [500.6_(A)_(1)](https://2023.antflix.net#500.6_(A)_(1))", + "displayTitle": "(1) Group A", + "children": [], + "url": "https://2023.antflix.net#500.6_(A)_(1)" + }, + { + "body": "Flammable gas, flammable liquid\u2014produced vapor, or combustible liquid\u2014produced vapor mixed with air that may burn or explode, having either a maximum experimental safe gap (MESG) value less than or equal to 0.45 mm or a minimum igniting current ratio (MIC ratio) less than or equal to 0.40. [497:3.3.5.1.2] Informational Note: A typical Class I, Group B material is hydrogen. [500.6_(A)_(2)](https://2023.antflix.net#500.6_(A)_(2))", + "displayTitle": "(2) Group B", + "children": [], + "url": "https://2023.antflix.net#500.6_(A)_(2)" + }, + { + "body": "Flammable gas, flammable liquid\u2014produced vapor, or combustible liquid\u2014produced vapor mixed with air that may burn or explode, having either a maximum experimental safe gap (MESG) value greater than 0.45 mm and less than or equal to 0.75 mm, or a minimum igniting current (MIC) ratio greater than 0.40 and less than or equal to 0.80. [497:3.3.5.1.3] Informational Note: A typical Class I, Group C material is ethylene. [500.6_(A)_(3)](https://2023.antflix.net#500.6_(A)_(3))", + "displayTitle": "(3) Group C", + "children": [], + "url": "https://2023.antflix.net#500.6_(A)_(3)" + }, + { + "body": "Flammable gas, flammable liquid\u2014produced vapor, or combustible liquid\u2014produced vapor mixed with air that may burn or explode, having either a maximum experimental safe gap (MESG) value greater than 0.75 mm or a minimum igniting current (MIC) ratio greater than 0.80. [497:3.3.5.1.4] Informational Note No. 1: A typical Class I, Group D material is propane. [497:3.3.5.1.4] Informational Note No. 2: See ANSI/ASHRAE 15, Safety Standard for Refrigeration Systems, for information on the classification of areas involving ammonia atmospheres. [500.6_(A)_(4)](https://2023.antflix.net#500.6_(A)_(4))", + "displayTitle": "(4) Group D", + "children": [], + "url": "https://2023.antflix.net#500.6_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#500.6_(A)" + }, + { + "body": "Combustible dust shall be grouped in accordance with 500.6(B)(1) through (B)(3). [500.6_(B)](https://2023.antflix.net#500.6_(B))", + "displayTitle": "(B) Class II Combustible Dust Group Classifications", + "children": [ + { + "body": "Atmospheres containing combustible metal dusts, including aluminum, magnesium, and their commercial alloys, or other combustible dusts whose particle size, abrasiveness, and conductivity present similar hazards in the use of electrical equipment. [499:3.3.8.1.1] Informational Note: Certain metal dusts may have characteristics that require safeguards beyond those required for atmospheres containing the dusts of aluminum, magnesium, and their commercial alloys. For example, zirconium, thorium, and uranium dusts have extremely low ignition temperatures [as low as 20\u00b0C (68\u00b0F)] and minimum ignition energies lower than any material classified in any of the Class I or Class II groups. [500.6_(B)_(1)](https://2023.antflix.net#500.6_(B)_(1))", + "displayTitle": "(1) Group E", + "children": [], + "url": "https://2023.antflix.net#500.6_(B)_(1)" + }, + { + "body": "Atmospheres containing combustible carbonaceous dusts that have more than 8 percent total entrapped volatiles (see ASTM D3175-2017, Standard Test Method for Volatile Matter in the Analysis Sample of Coal and Coke, for coal and coke dusts) or that have been sensitized by other materials so that they present an explosion hazard. [499:3.3.8.1.2] Coal, carbon black, charcoal, and coke dusts are examples of carbonaceous dusts. [499:A.3.3.8.1.2] Informational Note: Testing of specific dust samples, following established ASTM testing procedures, is a method used to identify the combustibility of a specific dust and the need to classify those locations containing that material as Group F. [500.6_(B)_(2)](https://2023.antflix.net#500.6_(B)_(2))", + "displayTitle": "(2) Group F", + "children": [], + "url": "https://2023.antflix.net#500.6_(B)_(2)" + }, + { + "body": "Atmospheres containing combustible dusts not included in Group E or Group F, including flour, grain, wood, plastic, and chemicals. [499:3.3.8.1.3] Informational Note No. 1: See NFPA 499, Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, for information on group classification of Class II materials. Informational Note No. 2: The explosion characteristics of air mixtures of dust vary with the materials involved. For Class II locations, Groups E, F, and G, the classification involves the tightness of the joints of assembly and shaft openings to prevent the entrance of dust in the dust-ignitionproof enclosure, the blanketing effect of layers of dust on the equipment that may cause overheating, and the ignition temperature of the dust. It is necessary, therefore, that equipment be identified not only for the class but also for the specific group of dust that will be present. Informational Note No. 3: See ANSI/IEEE C2, National Electrical Safety Code, Section 127A, Coal Handling Areas. Certain dusts might require additional precautions due to chemical phenomena that can result in the generation of ignitible gases. [500.6_(B)_(3)](https://2023.antflix.net#500.6_(B)_(3))", + "displayTitle": "(3) Group G", + "children": [], + "url": "https://2023.antflix.net#500.6_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#500.6_(B)" + }, + { + "body": "Combustible fibers/flyings shall not be further grouped. [500.6_(C)](https://2023.antflix.net#500.6_(C))", + "displayTitle": "(C) Class III Combustible Fibers/Flyings", + "children": [], + "url": "https://2023.antflix.net#500.6_(C)" + }, + { + "body": "Ignitible fibers/flyings shall not be further grouped. [500.6_(D)](https://2023.antflix.net#500.6_(D))", + "displayTitle": "(D) Class III Ignitible Fibers/Flyings", + "children": [], + "url": "https://2023.antflix.net#500.6_(D)" + } + ], + "url": "https://2023.antflix.net#500.6" + }, + { + "body": "Electrical and electronic equipment in hazardous (classified) locations shall be protected by one or more of the techniques in 500.7(A) through (P). Suitability of the protection techniques for specific hazardous locations is shown in Chapter 9, Table 13. [500.7](https://2023.antflix.net#500.7)", + "displayTitle": "500.7 Protection Techniques", + "children": [ + { + "body": "This protection technique shall be permitted for equipment in Class I, Division 1 or 2 locations. [500.7_(A)](https://2023.antflix.net#500.7_(A))", + "displayTitle": "(A) Explosionproof Equipment", + "children": [], + "url": "https://2023.antflix.net#500.7_(A)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class II, Division 1 or 2 locations. [500.7_(B)](https://2023.antflix.net#500.7_(B))", + "displayTitle": "(B) Dust Ignitionproof", + "children": [], + "url": "https://2023.antflix.net#500.7_(B)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class II, Division 2 or Class III, Division 1 or 2 locations. [500.7_(C)](https://2023.antflix.net#500.7_(C))", + "displayTitle": "(C) Dusttight", + "children": [], + "url": "https://2023.antflix.net#500.7_(C)" + }, + { + "body": "This protection technique shall be permitted for equipment in any hazardous (classified) location for which it is identified. [500.7_(D)](https://2023.antflix.net#500.7_(D))", + "displayTitle": "(D) Purged and Pressurized", + "children": [], + "url": "https://2023.antflix.net#500.7_(D)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I, Division 1 or Division 2; Class II, Division 1 or Division 2; or Class III, Division 1 or Division 2 locations. [500.7_(E)](https://2023.antflix.net#500.7_(E))", + "displayTitle": "(E) Intrinsic Safety", + "children": [], + "url": "https://2023.antflix.net#500.7_(E)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I, Division 2; Class II, Division 2; or Class III, Division 1 or 2 locations. [500.7_(F)](https://2023.antflix.net#500.7_(F))", + "displayTitle": "(F) Nonincendive Circuit", + "children": [], + "url": "https://2023.antflix.net#500.7_(F)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I. Division 2; Class II, Division 2; or Class III, Division 1 or 2 locations. [500.7_(G)](https://2023.antflix.net#500.7_(G))", + "displayTitle": "(G) Nonincendive Equipment", + "children": [], + "url": "https://2023.antflix.net#500.7_(G)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I, Division 2; Class II, Division 2; or Class III, Division 1 or 2 locations. [500.7_(H)](https://2023.antflix.net#500.7_(H))", + "displayTitle": "(H) Nonincendive Component", + "children": [], + "url": "https://2023.antflix.net#500.7_(H)" + }, + { + "body": "This protection technique shall be permitted for current-interrupting contacts in Class I, Division 2 locations as described in 501.115(B)(1)(2). [500.7_(I)](https://2023.antflix.net#500.7_(I))", + "displayTitle": "(I) Oil Immersion", + "children": [], + "url": "https://2023.antflix.net#500.7_(I)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I, Division 2; Class II, Division 2; or Class III, Division 1 or 2 locations. [500.7_(J)](https://2023.antflix.net#500.7_(J))", + "displayTitle": "(J) Hermetically Sealed", + "children": [], + "url": "https://2023.antflix.net#500.7_(J)" + }, + { + "body": "A detection system for flammable gases shall be permitted as a means of protection in restricted industrial establishments. [500.7_(K)](https://2023.antflix.net#500.7_(K))", + "displayTitle": "(K) Detection System for Flammable Gases", + "children": [ + { + "body": "Any gas detection system used as a protection technique shall meet all of the requirements in 500.7(K)(1)(a) through (K)(1)(e). The gas detection equipment used shall be listed for Class I, Division 1 and listed for the detection of the specific gas or vapor to be encountered.The gas detection system shall not use portable or transportable equipment or temporary wiring methods.The gas detection system shall only use point-type sensors. The system shall be permitted to be augmented with open-path (line-of-sight)-type sensors, but open-path\u2014type sensors shall not be the basis for this protection technique.The type of detection equipment and its listing, installation location(s), alarm and shutdown criteria, and calibration frequency shall be documented where gas detectors are used as a protection technique.The applications for the use of gas detection systems as a protection technique shall be limited to 500.7(K)(2), (K)(3), or (K)(4).Informational Note No. 1: See ANSI/UL 121303, Guide for Use of Detectors for Flammable Gases, or ANSI/FM 121303, Guide for Use of Detectors for Flammable Gases, for additional information.Informational Note No. 2: See ANSI/UL 60079-29-1, Explosive Atmospheres - Part 29-1: Gas Detectors - Performance Requirements of Detectors for Flammable Gases, or ANSI/FM 60079-29-1, Explosive Atmospheres - Part 29-1: Gas Detectors - Performance Requirements of Detectors for Flammable Gases, for additional information.Informational Note No. 3: See ANSI/API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2, for additional information.Informational Note No. 4: See ANSI/UL 60079-29-2, Explosive Atmospheres - Part 29-2: Gas Detectors - Selection, Installation, Use and Maintenance of Detectors for Flammable Gases and Oxygen, or ANSI/FM-60079-29-2, Explosive atmospheres - Part 29-2: Gas Detectors - Selection, Installation, Use and Maintenance of Detectors for Flammable Gases and Oxygen, for additional information. [500.7_(K)_(1)](https://2023.antflix.net#500.7_(K)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#500.7_(K)_(1)" + }, + { + "body": "A location, enclosed space, or building that is classified as a Class I, Division 1 location due to inadequate ventilation and is provided with a detection system for flammable gases shall be permitted to use electrical equipment, installation methods, and wiring practices suitable for Class I, Division 2 installations. Sensing a gas concentration of not more than 40 percent of the lower flammable limit or a gas detector system malfunction shall activate an alarm (audible or visual, or both, as most appropriate for the area). [500.7_(K)_(2)](https://2023.antflix.net#500.7_(K)_(2))", + "displayTitle": "(2) Inadequate Ventilation", + "children": [], + "url": "https://2023.antflix.net#500.7_(K)_(2)" + }, + { + "body": "Any building or enclosed space that does not contain a source of flammable gases or vapors that is located in, or has an opening into, a Class I, Division 2 hazardous (classified) location and is provided with a detection system for flammable gases shall be permitted to use electrical equipment, installation methods, and wiring practices suitable for unclassified installations under all of the following conditions: An alarm (audible or visual, or both) shall be sounded at not more than 20 percent of the lower flammable limit.Sensing a gas concentration of not more than 40 percent of the lower flammable limit or a gas detector system malfunction shall activate an alarm (audible or visual, or both, as most appropriate for the area) and initiate automatic disconnection of power from all electrical devices in the area that are not suitable for Class I, Division 2.The power disconnecting device(s) shall be suitable for Class I, Division 1 if located inside the building or enclosed space. If the disconnecting device(s) is located outside the building or enclosed space, it shall be suitable for the location in which it is installed.Redundant or duplicate equipment (such as sensors) shall be permitted to be installed to avoid disconnecting electrical power when equipment malfunctions are indicated.When automatic shutdown could introduce additional or increased hazard, this technique shall not be permitted. [500.7_(K)_(3)](https://2023.antflix.net#500.7_(K)_(3))", + "displayTitle": "(3) Interior of a Building or Enclosed Space", + "children": [], + "url": "https://2023.antflix.net#500.7_(K)_(3)" + }, + { + "body": "Inside the interior of a control panel containing instrumentation or other equipment using or measuring flammable liquids, gases, or vapors which is provided with a detection system for flammable gases shall be permitted to use electrical equipment, installation methods, and wiring practices suitable for Class I, Division 2 installations. An alarm (audible or visual, or both) shall be sounded at not more than 40 percent of the lower flammable limit. [500.7_(K)_(4)](https://2023.antflix.net#500.7_(K)_(4))", + "displayTitle": "(4) Interior of a Control Panel", + "children": [], + "url": "https://2023.antflix.net#500.7_(K)_(4)" + } + ], + "url": "https://2023.antflix.net#500.7_(K)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I or II, Division 1 or 2 locations for which the equipment is identified. Informational Note: The identified class and division depends on the intended explosive atmosphere and the number of faults applied as part of the protection technique evaluation. [500.7_(L)](https://2023.antflix.net#500.7_(L))", + "displayTitle": "(L) Inherently Safe Optical Radiation \"OP Is.\"", + "children": [], + "url": "https://2023.antflix.net#500.7_(L)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I or II, Division 2 locations for which the equipment is identified. Informational Note: The identified class and division depends on the intended explosive atmosphere as part of the protection technique evaluation. [500.7_(M)](https://2023.antflix.net#500.7_(M))", + "displayTitle": "(M) Protected Optical Radiation \"OP pr.\"", + "children": [], + "url": "https://2023.antflix.net#500.7_(M)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I or II, Division 1 or 2 locations for which the equipment is identified. Informational Note: The identified class and division depends on the intended explosive atmosphere and the number of faults applied as part of the protection technique evaluation. [500.7_(N)](https://2023.antflix.net#500.7_(N))", + "displayTitle": "(N) Optical System With Interlock \"OP sh.\"", + "children": [], + "url": "https://2023.antflix.net#500.7_(N)" + }, + { + "body": "This protection technique shall be permitted for skin effect trace heating equipment in Class I, Division 2; Class II, Division 2; or Class III, Division 2 locations for which it is listed. [500.7_(O)](https://2023.antflix.net#500.7_(O))", + "displayTitle": "(O) Protection by Skin Effect Trace Heating \"IEEE 844.1\"", + "children": [], + "url": "https://2023.antflix.net#500.7_(O)" + }, + { + "body": "This protection technique shall be permitted for electrical resistance trace heating equipment in Class I, Division 1; Class I, Division 2; Class II, Division 1; Class II, Division 2; Class III, Division 1; or Class III, Division 2 locations for which it is listed. [500.7_(P)](https://2023.antflix.net#500.7_(P))", + "displayTitle": "(P) Protection by Electrical Resistance Trace Heating \"60079-30-1\"", + "children": [], + "url": "https://2023.antflix.net#500.7_(P)" + }, + { + "body": "This protection technique shall be permitted for impedance heating equipment in Class I, Division 2; Class II, Division 2; or Class III, Division 2 locations for which it is listed. [500.7_(Q)](https://2023.antflix.net#500.7_(Q))", + "displayTitle": "(Q) Protection by Impedance Heating \"IEEE 844.3\"", + "children": [], + "url": "https://2023.antflix.net#500.7_(Q)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I, Division 2 locations. [500.7_(R)](https://2023.antflix.net#500.7_(R))", + "displayTitle": "(R) Enclosed-Break", + "children": [], + "url": "https://2023.antflix.net#500.7_(R)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I, Division 2 locations. [500.7_(S)](https://2023.antflix.net#500.7_(S))", + "displayTitle": "(S) Nonsparking", + "children": [], + "url": "https://2023.antflix.net#500.7_(S)" + }, + { + "body": "This protection technique shall be permitted for equipment in Class I, Division 2; Class II, Division 2; Class III, Division 1; or Class III, Division 2 locations. [500.7_(T)](https://2023.antflix.net#500.7_(T))", + "displayTitle": "(T) Sealed", + "children": [], + "url": "https://2023.antflix.net#500.7_(T)" + }, + { + "body": "Protection techniques not specified in 500.7(A) through (T) shall be permitted for use in equipment listed for use in hazardous (classified) locations. Informational Note: See ANSI/UL 60079-33, Explosive Atmospheres - Part 33: Equipment Protection by Special Protection \"s\", for additional information. [500.7_(U)](https://2023.antflix.net#500.7_(U))", + "displayTitle": "(U) Special Protection Techniques", + "children": [], + "url": "https://2023.antflix.net#500.7_(U)" + } + ], + "url": "https://2023.antflix.net#500.7" + }, + { + "body": "Explosionproof or dust-ignitionproof equipment shall not be permitted for use at temperatures lower than -25\u00b0C (-13\u00b0F) unless they are identified for low-temperature service. Informational Note: At low ambient temperatures, flammable concentrations of vapors might not exist in a location classified as Class I, Division 1 at normal ambient temperature. [500.8](https://2023.antflix.net#500.8)", + "displayTitle": "500.8 Equipment", + "children": [ + { + "body": "Suitability of identified equipment shall be determined by one of the following: Equipment listing or labelingEvidence of equipment evaluation from a qualified testing laboratory or inspection agency concerned with product evaluationEvidence acceptable to the authority having jurisdiction such as a manufacturer's self-evaluation or an owner's engineering judgmentInformational Note: Additional documentation for equipment might include certificates demonstrating compliance with applicable equipment standards, indicating special conditions of use, and providing other pertinent information. [500.8_(A)](https://2023.antflix.net#500.8_(A))", + "displayTitle": "(A) Suitability", + "children": [], + "url": "https://2023.antflix.net#500.8_(A)" + }, + { + "displayTitle": "(B) Approval for Class and Properties", + "children": [ + { + "body": "Equipment shall be identified not only for the class of location but also for the explosive, combustible, or ignitible properties of the specific gas, vapor, dust, or fibers/flyings that will be present. In addition, Class I equipment shall not have any exposed surface that operates at a temperature in excess of the autoignition temperature of the specific gas or vapor. Class II equipment shall not have an external temperature higher than that specified in 500.8(D) (2). Class III equipment shall not exceed the maximum surface temperatures specified in 503.5. Exception No. 1: Group D equipment shall be permitted to be used for atmospheres containing butadiene if all conduit runs into explosion-proof equipment are provided with explosionproof seals installed within 450 mm (18 in.) of the enclosure. Exception No. 2: Group C equipment shall be permitted to be used for atmospheres containing allyl glycidyl ether, n-butyl glycidyl ether, ethylene oxide, propylene oxide, and acrolein if all conduit runs into explosionproof equipment are provided with explosionproof seals installed within 450 mm (18 in.) of the enclosure. Informational Note: See 500.8(C)(6)(a) regarding general-purpose equipment. Luminaires and other heat-producing apparatus, switches, circuit breakers, and plugs and receptacles are potential sources of ignition and are investigated for suitability in classified locations. Such types of equipment, as well as cable terminations for entry into explosionproof enclosures, are available as listed for Class I, Division 2 locations. Fixed wiring, however, might use wiring methods that are not evaluated with respect to classified locations. Therefore, wiring products such as cable, raceways, boxes, and fittings are not marked as being suitable for Class I, Division 2 locations. [500.8_(B)_(1)](https://2023.antflix.net#500.8_(B)_(1))", + "displayTitle": "(1) Equipment Identification", + "children": [], + "url": "https://2023.antflix.net#500.8_(B)_(1)" + }, + { + "body": "Equipment identified for a Division 1 location shall be permitted in a Division 2 location of the same class, group, and temperature class and shall comply with the requirements of 500.8(B)(2)(a) or (B)(2)(b) as applicable. Intrinsically safe apparatus having a control drawing requiring the installation of associated apparatus for a Division 1 installation shall be permitted to be installed in a Division 2 location if the same associated apparatus is used for the Division 2 installation.Equipment required to be explosionproof shall incorporate seals in accordance with 501.15(A) or (D) when the wiring methods of 501.10(B) are employed. [500.8_(B)_(2)](https://2023.antflix.net#500.8_(B)_(2))", + "displayTitle": "(2) Equipment Application", + "children": [], + "url": "https://2023.antflix.net#500.8_(B)_(2)" + }, + { + "body": "Where specifically permitted in Part III of Articles 501, 502, and 503, general-purpose equipment or equipment in general-purpose enclosures shall be permitted to be installed in Division 2 locations if the equipment does not constitute a source of ignition under normal operating conditions. [500.8_(B)_(3)](https://2023.antflix.net#500.8_(B)_(3))", + "displayTitle": "(3) General-Purpose Equipment", + "children": [], + "url": "https://2023.antflix.net#500.8_(B)_(3)" + }, + { + "body": "Equipment that depends on a single compression seal, diaphragm, or tube to prevent flammable or combustible fluids from entering the equipment shall be identified for a Class I, Division 2 location even if installed in an unclassified location. Equipment installed in a Class I, Division 1 location shall be identified for the Class I, Division 1 location. Informational Note: Equipment used for flow measurement is an example of equipment having a single compression seal, diaphragm, or tube. [500.8_(B)_(4)](https://2023.antflix.net#500.8_(B)_(4))", + "displayTitle": "(4) Process Seals", + "children": [], + "url": "https://2023.antflix.net#500.8_(B)_(4)" + }, + { + "body": "Unless otherwise specified, normal operating conditions for motors shall be assumed to be rated full-load steady conditions. [500.8_(B)_(5)](https://2023.antflix.net#500.8_(B)_(5))", + "displayTitle": "(5) Motors", + "children": [], + "url": "https://2023.antflix.net#500.8_(B)_(5)" + }, + { + "body": "Where flammable gases, flammable liquid\u2014produced vapors, or combustible liquid-produced vapors and combustible dusts are or might be present at the same time, the simultaneous presence of the specific materials shall be considered when determining the safe operating temperature of the electrical equipment. [500.8_(B)_(6)](https://2023.antflix.net#500.8_(B)_(6))", + "displayTitle": "(6) Simultaneous Classifications", + "children": [], + "url": "https://2023.antflix.net#500.8_(B)_(6)" + } + ], + "url": "https://2023.antflix.net#500.8_(B)" + }, + { + "body": "Equipment shall be marked to show the environment for which it has been evaluated. Unless otherwise specified or allowed in 500.8(C)(6), the marking shall include the information specified in 500.8(C)(1) through (C)(5). [500.8_(C)](https://2023.antflix.net#500.8_(C))", + "displayTitle": "(C) Marking", + "children": [ + { + "body": "The marking shall specify the class(es) for which the equipment is suitable. [500.8_(C)_(1)](https://2023.antflix.net#500.8_(C)_(1))", + "displayTitle": "(1) Class", + "children": [], + "url": "https://2023.antflix.net#500.8_(C)_(1)" + }, + { + "body": "The marking shall specify the division if the equipment is suitable for Division 2 only. Equipment suitable for Division 1 shall be permitted to omit the division marking. Informational Note: See 500.8(B)(2). Equipment not marked to indicate a division, or marked \"Division 1\" or \"Div. 1,\" is suitable for both Division 1 and Division 2 locations. Equipment marked \"Division 2\" or \"Div. 2\" is suitable for Division 2 locations only. [500.8_(C)_(2)](https://2023.antflix.net#500.8_(C)_(2))", + "displayTitle": "(2) Division", + "children": [], + "url": "https://2023.antflix.net#500.8_(C)_(2)" + }, + { + "body": "The marking shall specify the applicable material classification group(s) or specific gas, vapor, dust, or fiber/flying in accordance with 500.6. Exception: Fixed luminaires marked for use only in Class I, Division 2 or Class II, Division 2 locations shall not be required to indicate the group. Informational Note: A specific gas, vapor, dust, or fiber/flying is typically identified by the generic name, chemical formula, CAS number, or combination thereof. [500.8_(C)_(3)](https://2023.antflix.net#500.8_(C)_(3))", + "displayTitle": "(3) Material Classification Group", + "children": [], + "url": "https://2023.antflix.net#500.8_(C)_(3)" + }, + { + "body": "The marking shall specify the temperature class or operating temperature at a 40\u00b0C ambient temperature, or at the higher ambient temperature if the equipment is rated and marked for an ambient temperature of greater than 40\u00b0C. For equipment installed in a Class II, Division 1 location, the temperature class or operating temperature shall be based on operation of the equipment when blanketed with the maximum amount of dust that can accumulate on the equipment. The temperature class, if provided, shall be indicated using the temperature class (T codes) shown in Table 500.8(C)(4). Equipment for Class I and Class II shall be marked with the maximum safe operating temperature, as determined by simultaneous exposure to the combinations of Class I and Class II conditions. Exception: Equipment of the non-heat-producing type, such as junction boxes, conduit, and fittings, and equipment of the heat-producing type having a maximum temperature not more than 100\u00b0C shall not be required to have a marked operating temperature or temperature class. Informational Note: More than one marked temperature class or operating temperature, for gases and vapors, dusts, and different ambient temperatures, may appear. [500.8_(C)_(4)](https://2023.antflix.net#500.8_(C)_(4))", + "displayTitle": "(4) Equipment Temperature", + "children": [], + "url": "https://2023.antflix.net#500.8_(C)_(4)" + }, + { + "body": "Electrical equipment designed for use in the ambient temperature range between \u201425\u00b0C to +40\u00b0C shall require no ambient temperature marking. For equipment rated for a temperature range other than \u201425\u00b0C to +40\u00b0C, the marking shall specify the special range of ambient temperatures in degrees Celsius. The marking shall include either the symbol \"Ta\" or \"Tamb.\" Informational Note: As an example, such a marking might be \"\u201430\u00b0C \u2264 Ta \u2264 +40\u00b0C.\" [500.8_(C)_(5)](https://2023.antflix.net#500.8_(C)_(5))", + "displayTitle": "(5) Ambient Temperature Range", + "children": [], + "url": "https://2023.antflix.net#500.8_(C)_(5)" + }, + { + "body": "General-Purpose Equipment. Fixed general-purpose equipment in Class I locations, other than fixed luminaires, that is acceptable for use in Class I, Division 2 locations shall not be required to be marked with the class, division, group, temperature class, or ambient temperature range.Dusttight Equipment, Fixed dusttight equipment, other than fixed luminaires, that is acceptable for use in Class II, Division 2 and Class III locations shall not be required to be marked with the class, division, group, temperature class, or ambient temperature range.Associated Apparatus. Associated intrinsically safe apparatus and associated nonincendive field wiring apparatus that are not protected by an alternative type of protection shall not be marked with the class, division, group, or temperature class. Associated intrinsically safe apparatus and associated nonincendive field wiring apparatus shall be marked with the class, division, and group of the apparatus to which it is to be connected.Simple Apparatus. \"Simple apparatus\" as defined in Article 100 Part III, shall not be required to be marked with class, division, group, temperature class, or ambient temperature range. [500.8_(C)_(6)](https://2023.antflix.net#500.8_(C)_(6))", + "displayTitle": "(6) Special Allowances", + "children": [], + "url": "https://2023.antflix.net#500.8_(C)_(6)" + } + ], + "url": "https://2023.antflix.net#500.8_(C)" + }, + { + "displayTitle": "(D) Temperature", + "children": [ + { + "body": "The temperature marking specified in 500.8(C) shall not exceed the autoignition temperature of the specific gas or vapor to be encountered. Informational Note: See NFPA 497, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, for information on autoignition temperatures of gases and vapors. [500.8_(D)_(1)](https://2023.antflix.net#500.8_(D)_(1))", + "displayTitle": "(1) Class I Temperature", + "children": [], + "url": "https://2023.antflix.net#500.8_(D)_(1)" + }, + { + "body": "The temperature marking specified in 500.8(C) shall be less than the ignition temperature of the specific dust or metal fiber/flying to be encountered. For organic dusts that might dehydrate or carbonize, the temperature marking shall not exceed the lower of either the ignition temperature or 165\u00b0C (329\u00b0F). Informational Note: See NFPA 499, Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, for minimum ignition temperatures of specific dusts. [500.8_(D)_(2)](https://2023.antflix.net#500.8_(D)_(2))", + "displayTitle": "(2) Class II Temperature", + "children": [], + "url": "https://2023.antflix.net#500.8_(D)_(2)" + }, + { + "body": "The temperature marking specified in 500.8(C) shall be less than the ignition temperature of the specific fiber/flying to be encountered, except as specified in 500.8(D)(3)(a) or (D)(3)(b). For nonmetal combustible fibers/flyings that might dehydrate or carbonize, the temperature marking shall not exceed the lower of either the ignition temperature or 165\u00b0C (329\u00b0F).When ignitible fibers/flyings are present, the maximum surface temperatures under operating conditions shall not exceed 165\u00b0C (329\u00b0F) for equipment that is not subject to overloading, and 120\u00b0C (248\u00b0F) for equipment (such as motors or power transformers) that might be overloaded. [500.8_(D)_(3)](https://2023.antflix.net#500.8_(D)_(3))", + "displayTitle": "(3) Class III Temperature", + "children": [], + "url": "https://2023.antflix.net#500.8_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#500.8_(D)" + }, + { + "body": "The supply connection entry thread form shall be NPT or metric. Conduit and fittings shall be made wrench-tight to prevent sparking when fault current flows through the conduit system, and to ensure the explosionproof integrity of the conduit system where applicable. Equipment provided with threaded entries for field wiring connections shall be installed in accordance with 500.8(E)(1) or (E)(2) and with (E)(3). [500.8_(E)](https://2023.antflix.net#500.8_(E))", + "displayTitle": "(E) Threading", + "children": [ + { + "body": "For equipment provided with threaded entries for NPT-threaded conduit or fittings, listed conduit, listed conduit fittings, or listed cable fittings shall be used. All NPT-threaded conduit and fittings shall be threaded with a National (American) Standard Pipe Taper (NPT) thread. NPT-threaded entries into explosionproof equipment shall be made up with at least five threads fully engaged. Exception: For listed explosionproof equipment, joints with factory-threaded NPT entries shall be made up with at least four and one-half threads fully engaged. Informational Note No. 1: See ASME B1.20.1, Pipe Threads, General Purpose (Inch), for thread specifications for male NPT threads. Informational Note No. 2: See ASME B1.20.1, Pipe Threads, General Purpose (Inch), and ANSI/UL 1203, Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations, for information on female NPT-threaded entries using modified National Standard Pipe Taper (NPT) threads. [500.8_(E)_(1)](https://2023.antflix.net#500.8_(E)_(1))", + "displayTitle": "(1) Equipment Provided With Threaded Entries for NPT-Threaded Conduit or Fittings", + "children": [], + "url": "https://2023.antflix.net#500.8_(E)_(1)" + }, + { + "body": "For equipment with metric-threaded entries, listed conduit fittings or listed cable fittings shall be used. Such entries shall be identified as being metric, or listed adapters to permit connection to conduit or NPT-threaded fittings shall be provided with the equipment and shall be used for connection to conduit or NPT-threaded fittings. Metric-threaded fittings installed into explosionproof equipment shall have a class of fit of at least 6g/6H and shall be made up with at least five threads fully engaged. Informational Note: See ISO 965-1, ISO general purpose metric screw threads - Tolerances - Part 1: Principles and basic data, and ISO 965-3, ISO general purpose metric screw threads - Tolerances - Part 3: Deviations for constructional screw threads, for threading specifications for metric-threaded entries. [500.8_(E)_(2)](https://2023.antflix.net#500.8_(E)_(2))", + "displayTitle": "(2) Equipment Provided With Threaded Entries for Metric-Threaded Fittings", + "children": [], + "url": "https://2023.antflix.net#500.8_(E)_(2)" + }, + { + "body": "All unused openings shall be closed with blanking elements or close-up plugs that are listed for the location. The thread engagement shall comply with the requirements of 500.8(E)(1) or (E)(2). [500.8_(E)_(3)](https://2023.antflix.net#500.8_(E)_(3))", + "displayTitle": "(3) Unused Openings", + "children": [], + "url": "https://2023.antflix.net#500.8_(E)_(3)" + } + ], + "url": "https://2023.antflix.net#500.8_(E)" + }, + { + "body": "An optical fiber cable, with or without current-carrying conductors (hybrid optical fiber cable), shall be installed to address the associated fire hazard and sealed to address the associated explosion hazard in accordance with Part II of Articles 501, 502, or 503, as applicable. [500.8_(F)](https://2023.antflix.net#500.8_(F))", + "displayTitle": "(F) Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#500.8_(F)" + }, + { + "body": "The risk of ignition from optical radiation shall be evaluated for laser equipment, optical fiber equipment, and any other convergent light sources or beams where light is focused in one single point within a hazardous area with a wavelength range of 380 nm to 10 pm. This requirement shall include optical equipment that is located outside the explosive atmosphere, but whose emitted optical radiation enters such atmospheres. Informational Note: See ANSI/UL 60079-28, Explosive Atmospheres - Part 28: Protection of Equipment and Transmission Systems Using Optical Radiation, for information on types of protection that can be applied to minimize the risk of ignition in explosive atmospheres from optical radiation. Table 500.8(C)(4) Classification of Maximum Surface Temperature Maximum Temperature Temperature Class(T Code) \u00b0C \u00b0F 450 842 T1 300 572 T2 280 536 T2A 260 500 T2B 230 446 T2C 215 419 T2D 200 392 T3 180 356 T3A 165 329 T3B 160 320 T3C 135 275 T4 120 248 T4A 100 212 T5 85 185 T6 [500.8_(G)](https://2023.antflix.net#500.8_(G))", + "displayTitle": "(G) Equipment Involving Optical Radiation", + "children": [], + "url": "https://2023.antflix.net#500.8_(G)" + } + ], + "url": "https://2023.antflix.net#500.8" + } + ], + "url": "https://2023.antflix.net#500" + }, + { + "displayTitle": "Article 501 Class I Locations", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_73_I" + }, + { + "body": "This article covers the requirements for electrical and electronic equipment and wiring for all voltages in Class I, Division 1 and Division 2 locations where flammable gases, flammable liquid\u2014produced vapors, or combustible liquid\u2014produced vapors are or might be present in the air in quantities sufficient to produce explosive or ignitible mixtures. [501.1](https://2023.antflix.net#501.1)", + "displayTitle": "501.1 Scope", + "children": [], + "url": "https://2023.antflix.net#501.1" + }, + { + "body": "Equipment listed and marked in accordance with 505.9(C)(2) for use in Zone 0, 1, or 2 locations shall be permitted in Class I, Division 2 locations for the same gas and with a suitable temperature class. Equipment listed and marked in accordance with 505.9(C)(2) for use in Zone 0 locations shall be permitted in Class I, Division 1 or Division 2 locations for the same gas and with a suitable temperature class. [501.5](https://2023.antflix.net#501.5)", + "displayTitle": "501.5 Zone Equipment", + "children": [], + "url": "https://2023.antflix.net#501.5" + }, + { + "displayTitle": "Part II Wiring", + "children": [], + "url": "https://2023.antflix.net#divider_73_II" + }, + { + "body": "Wiring methods shall comply with 501.10(A) or (B). [501.10](https://2023.antflix.net#501.10)", + "displayTitle": "501.10 Wiring Methods", + "children": [ + { + "displayTitle": "(A) Class I, Division 1", + "children": [ + { + "body": "In Class I, Division 1 locations, the following wiring methods shall be permitted: Informational Note No. 1: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations].Threaded rigid metal conduit (RMC) or threaded intermediate metal conduit (IMC), including RMC or IMC conduit systems with supplemental corrosion protection coatings.PVC conduit, RTRC conduit, or HDPE conduit, where encased in a concrete envelope a minimum of 50 mm (2 in.) thick and provided with not less than 600 mm (24 in.) of cover measured from the top of the conduit to grade. The concrete encasement shall be permitted to be omitted where it is in accordance with 514.8(C) or 515.8(A). RMC or IMC conduit shall be used for the last 600 mm (24 in.) of the underground run to emergence or to the point of connection to the aboveground raceway. An equipment grounding conductor shall be included to provide for electrical continuity of the raceway system and for grounding of non\u2014current-carrying metal parts.Type MI cable terminated with fittings listed for the location. Type MI cable shall be installed and supported to avoid tensile stress at the termination fittings.In restricted industrial establishments, Type MC-HL cable listed for use in Class I, Zone 1 or Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath, an overall jacket of suitable polymeric material, and a separate equipment grounding conductor(s) in accordance with 250.122, and terminated with fittings listed for the application. If installed in a ladder, ventilated trough, or ventilated channel cable tray, the cable shall be installed in accordance with 392.22. Type MC-HL cable shall be installed in accordance with Part II of Article 330.In restricted industrial establishments, Type ITC-HL cable listed for use in Class I, Division 1 or Zone 1 locations, with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymeric material, terminated with fittings listed for the application, and installed in accordance with 335.4.Optical fiber cable Type OFNP, Type OFCP, Type OFNR, Type OFCR, Type OFNG, Type OFCG, Type OFN, or Type OFC installed in raceways in accordance with 501.10(A). These optical fiber cables shall be sealed in accordance with 501.15.In restricted industrial establishments for applications limited to 600 volts nominal or less, and where the cable is not subject to physical damage and is terminated with fittings listed for the location, Type TC-ER-HL cable. If installed in a ladder, ventilated trough, or ventilated channel cable tray, the cable shall be installed in accordance with 392.22. Type TC-ER-HL cable shall be listed for use in Class I, Division 1 or Zone 1 locations and shall be installed in accordance with 336.10.Informational Note No. 2: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cables and cable fittings.In restricted industrial establishments, listed Type P cable with metal braid armor and an overall jacket, terminated with fittings listed for the location, and installed in accordance with Part II of Article 337. If installed in a ladder, ventilated trough, or ventilated channel cable tray, the cable shall be installed in accordance with 392.22.Informational Note No. 3: See UL 1309A, Outline of Investigation for Cable for Use in Mobile Installations, for information on construction, testing, and marking of Type P cable.Informational Note No. 4: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cable. [501.10_(A)_(1)](https://2023.antflix.net#501.10_(A)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#501.10_(A)_(1)" + }, + { + "body": "If flexibility is necessary to minimize the transmission of vibration from equipment during operation or to allow for movement after installation during maintenance, one of the following shall be permitted: Flexible fittings listed for the location.Flexible cord in accordance with 501.140, terminated with cord connectors listed for the location.In restricted industrial establishments, for applications limited to 600 volts nominal or less where the cable is not subject to physical damage and is terminated with fittings listed for the location, Type TC-ER-HL cable. The cable shall be listed for use in Class I, Division 1 or Zone 1 locations and shall be installed in accordance with 336.10.Informational Note No. 1: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cables and cable fittings.In restricted industrial establishments, listed Type P cable with metal braid armor and an overall jacket where the cable is terminated with fittings listed for the location and installed in accordance with Part II of Article 337.Informational Note No. 2: See UL 1309A, Outline of Investigation for Cable for Use in Mobile Installations, for information on construction, testing, and marking of Type P cable fittings.Informational Note No. 3: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cable fittings. [501.10_(A)_(2)](https://2023.antflix.net#501.10_(A)_(2))", + "displayTitle": "(2) Flexible Connections", + "children": [], + "url": "https://2023.antflix.net#501.10_(A)_(2)" + }, + { + "body": "All boxes and fittings shall be identified for Class I, Division 1. Informational Note No. 1: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cables, explosionproof cable fittings, and explosionproof cord connectors for entry into enclosures required to be explosionproof. Informational Note No. 2: See ANSI/UL 1203, Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of explosionproof conduit fittings for entry into enclosures required to be explosionproof. [501.10_(A)_(3)](https://2023.antflix.net#501.10_(A)_(3))", + "displayTitle": "(3) Boxes and Fittings", + "children": [], + "url": "https://2023.antflix.net#501.10_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#501.10_(A)" + }, + { + "displayTitle": "(B) Class I, Division 2", + "children": [ + { + "body": "In Class I, Division 2 locations, all wiring methods in accordance with 501.10(A) and the following wiring methods shall be permitted: Informational Note No. 1: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations].Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with listed threaded or threadless fittings, including RMC or IMC conduit systems with supplemental corrosion protection coatings.Enclosed gasketed busways and enclosed gasketed wire-ways.Type PLTC cable or Type PLTC-ER cable used for Class 2 and Class 3 circuits, including installation in cable tray systems. The cable shall be terminated with listed fittings. Type PLTC-ER cable shall include an equipment grounding conductor in addition to a drain wire that might be present.Type ITC cable or Type ITC-ER cable as permitted in 335.4 and terminated with listed fittings. Type ITC-ER cable shall include an equipment grounding conductor in addition to a drain wire.Type MC, Type MV, Type TC, or Type TC-ER cable, including installation in cable tray systems. Type TC-ER cable shall include an equipment grounding conductor in addition to a drain wire that might be present. All cable types shall be terminated with listed fittings.Where metal conduit will not provide the corrosion resistance needed for the installation environment, any of the following shall be permitted:Listed reinforced thermosetting resin conduit (RTRC), factory elbows, and associated fittings, all marked with the suffix -XWPVC-coated RMC, factory elbows, and associated fittingsPVC-coated IMC, factory elbows, and associated fittingsIn restricted industrial establishments, Schedule 80 PVC conduit, factory elbows, and associated fittingsOptical fiber cable Type OFNP, Type OFCP, Type OFNR, Type OFCR, Type OFNG, Type OFCG, Type OFN, or Type OFC installed in cable trays or any other raceway in accordance with 501.10(B). Optical fiber cables shall be sealed in accordance with 501.15.Cablebus.In restricted industrial establishments, listed Type P cable with or without metal braid armor, with an overall jacket, and terminated with fittings listed for the location when entering explosionproof, flameproof, or pressurized equipment. The cable shall be installed in accordance with Part II of Article 337.Informational Note No. 2: See ANSI/UL 1309A, Outline of Investigation for Cable for Use in Mobile Installations, for information on construction, testing, and marking of Type P cable.Informational Note No. 3: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cable fittings. [501.10_(B)_(1)](https://2023.antflix.net#501.10_(B)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#501.10_(B)_(1)" + }, + { + "body": "If flexibility is necessary to minimize the transmission of vibration from equipment during operation or to allow for movement after installation during maintenance, one or more of the following shall be permitted: Listed flexible metal fittingsFlexible metal conduit with listed fittings and bonded in accordance with 501.30(B)Interlocked armor Type MC cable with listed fittingsLiquidtight flexible metal conduit with listed fittings and bonded in accordance with 501.30(B)Liquidtight flexible nonmetallic conduit with listed fittingsFlexible cord listed for extra-hard usage and terminated with listed fittings, with a conductor for use as an equipment grounding conductorFor elevator use, an identified elevator cable of Type EO, Type ETP, or Type ETT, shown under the \"use\" column in Table 400.4 for \"hazardous (classified) locations\" and terminated with listed fittingsIn restricted industrial establishments, listed Type P cable with or without metal braid armor, with an overall jacket, terminated with listed fittings and installed in accordance with Part II of Article 337 [501.10_(B)_(2)](https://2023.antflix.net#501.10_(B)_(2))", + "displayTitle": "(2) Flexible Connections", + "children": [], + "url": "https://2023.antflix.net#501.10_(B)_(2)" + }, + { + "body": "Nonincendive field wiring shall be permitted using any of the wiring methods permitted for unclassified locations. Nonincendive field wiring systems shall be installed in accordance with the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted in a nonincendive field wiring circuit if the simple apparatus does not interconnect the nonincendive field wiring circuit to any other circuit. Informational Note: See Article 100 for the definition of simple apparatus. Separate nonincendive field wiring circuits shall be installed in accordance with one of the following:In separate cablesIn multiconductor cables where the conductors of each circuit are within a grounded metal shieldIn multiconductor cables or in raceways, where the conductors of each circuit have insulation with a minimum thickness of 0.25 mm (0.01 in.) [501.10_(B)_(3)](https://2023.antflix.net#501.10_(B)_(3))", + "displayTitle": "(3) Nonincendive Field Wiring", + "children": [], + "url": "https://2023.antflix.net#501.10_(B)_(3)" + }, + { + "body": "Boxes and fittings shall be explosion-proof if required by 501.105(B)(2), 501.115(B)(1), or 501.150(B)(1). Informational Note No. 1: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cable for entry into enclosures required to be explosionproof. Informational Note No. 2: See ANSI/UL 1203, Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of explosionproof conduit fittings for entry into enclosures required to be explosionproof. [501.10_(B)_(4)](https://2023.antflix.net#501.10_(B)_(4))", + "displayTitle": "(4) Boxes and Fittings", + "children": [], + "url": "https://2023.antflix.net#501.10_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#501.10_(B)" + } + ], + "url": "https://2023.antflix.net#501.10" + }, + { + "body": "Seals in conduit and cable systems shall comply with 501.15(A) through (F). Sealing compound shall be used in Type MI cable termination fittings to exclude moisture and other fluids from the cable insulation. Informational Note No. 1: Seals are provided in conduit and cable systems to minimize the passage of gases and vapors and prevent the passage of flames from one portion of the electrical installation to another through the conduit. Such communication through Type MI cable is inherently prevented by construction of the cable. Unless specifically designed and tested for the purpose, conduit and cable seals are not intended to prevent the passage of liquids, gases, or vapors at a continuous pressure differential across the seal. Even at differences in pressure across the seal equivalent to a few inches of water, there may be a slow passage of gas or vapor through a seal and through conductors passing through the seal. Temperature extremes and highly corrosive liquids and vapors can affect the ability of seals to perform their intended function. Informational Note No. 2: Gas or vapor leakage and propagation of flames may occur through the interstices between the strands of standard stranded conductors larger than 2 AWG. Special conductor constructions, such as compacted strands or sealing of the individual strands, are means of reducing leakage and preventing the propagation of flames. [501.15](https://2023.antflix.net#501.15)", + "displayTitle": "501.15 Sealing and Drainage", + "children": [ + { + "body": "In Class I, Division 1 locations, conduit seals shall be located in accordance with 501.15(A)(1) through (A)(4). [501.15_(A)](https://2023.antflix.net#501.15_(A))", + "displayTitle": "(A) Conduit Seals, Class I, Division 1", + "children": [ + { + "body": "Each conduit entry into an explosionproof enclosure shall have a conduit seal where either of the following conditions apply: The enclosure contains apparatus, such as switches, circuit breakers, fuses, relays, or resistors that may produce arcs, sparks, or temperatures that exceed 80 percent of the autoignition temperature, in degrees Celsius, of the gas or vapor involved in normal operation.Exception: Seals shall not be required for conduit entering an enclosure under any one of the following conditions:The switch, circuit breaker, fuse, relay, or resistor is enclosed within a chamber hermetically sealed against the entrance of gases or vapors.The switch, circuit breaker, fuse, relay, or resistor is immersed in oil in accordance with 501.115(B)(1)(2).The switch, circuit breaker, fuse, relay, or resistor is enclosed within an enclosure, identified for the location, and marked \"Leads Factory Sealed,\" or \"Factory Sealed,\" \"Seal not Required,\" or equivalent.The switch, circuit breaker, fuse, relay, or resistor is part of a nonincendive circuit.The entry is metric designator 53 (trade size 2) or larger, and the enclosure contains terminals, splices, or taps.An enclosure, identified for the location, and marked \"Leads Factory Sealed\", or \"Factory Sealed,\" or \"Seal not Required,\" or equivalent shall not be considered to serve as a seal for another adjacent enclosure that is required to have a conduit seal.Conduit seals shall be installed within 450 mm (18 in.) from the enclosure or as required by the enclosure marking. Only threaded couplings, or explosionproof fittings such as unions, reducers, elbows, and capped elbows that are not larger than the trade size of the conduit, shall be permitted between the sealing fitting and the explosionproof enclosure. [501.15_(A)_(1)](https://2023.antflix.net#501.15_(A)_(1))", + "displayTitle": "(1) Entering Enclosures", + "children": [], + "url": "https://2023.antflix.net#501.15_(A)_(1)" + }, + { + "body": "Conduit seals shall be installed within 450 mm (18 in.) of the enclosure in each conduit entry into a pressurized enclosure where the conduit is not pressurized as part of the protection system. Informational Note No. 1: Installing the seal as close as possible to the enclosure will reduce problems with purging the dead airspace in the pressurized conduit. Informational Note No. 2: See NFPA 496, Standard for Purged and Pressurized Enclosures for Electrical Equipment, for information regarding pressurized enclosures. [501.15_(A)_(2)](https://2023.antflix.net#501.15_(A)_(2))", + "displayTitle": "(2) Pressurized Enclosures", + "children": [], + "url": "https://2023.antflix.net#501.15_(A)_(2)" + }, + { + "body": "Where two or more explosionproof enclosures that require conduit seals are connected by nipples or runs of conduit not more than 900 mm (36 in.) long, a single conduit seal in each such nipple connection or run of conduit shall be considered sufficient if the seal is located not more than 450 mm (18 in.) from either enclosure. [501.15_(A)_(3)](https://2023.antflix.net#501.15_(A)_(3))", + "displayTitle": "(3) Two or More Explosionproof Enclosures", + "children": [], + "url": "https://2023.antflix.net#501.15_(A)_(3)" + }, + { + "body": "A conduit seal shall be required in each conduit run leaving a Division 1 location. The sealing fitting shall be permitted to be installed on either side of the boundary within 3.05 m (10 ft) of the boundary, and it shall be designed and installed to minimize the amount of gas or vapor within the portion of the conduit installed in the Division 1 location that can be communicated beyond the seal. The conduit run between the conduit seal and the point at which the conduit leaves the Division 1 location shall contain no union, coupling, box, or other fitting except for a listed explosionproof reducer installed at the conduit seal. Where the seal is located on the Division 2 side of the boundary, the Division 1 wiring method shall extend into the Division 2 area to the seal. Exception No. 1: Metal conduit that contains no unions, couplings, boxes, or fittings, that passes completely through a Division 1 location with no fittings installed within 300 mm (12 in.) of either side of the boundary, shall not require a conduit seal if the termination points of the unbroken conduit are located in unclassified locations. Exception No. 2: For underground conduit installed in accordance with 300.5 where the boundary is below grade, the sealing fitting shall be permitted to be installed after the conduit emerges from below grade, but there shall be no union, coupling, box, or fitting, other than listed explosionproof reducers at the sealing fitting, in the conduit between the sealing fitting and the point at which the conduit emerges from below grade. [501.15_(A)_(4)](https://2023.antflix.net#501.15_(A)_(4))", + "displayTitle": "(4) Class I, Division 1 Boundary", + "children": [], + "url": "https://2023.antflix.net#501.15_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#501.15_(A)" + }, + { + "body": "In Class I, Division 2 locations, conduit seals shall be located in accordance with 501.15(B)(1) and (B)(2). [501.15_(B)](https://2023.antflix.net#501.15_(B))", + "displayTitle": "(B) Conduit Seals, Class I, Division 2", + "children": [ + { + "body": "For connections to enclosures that are required to be explosionproof, a conduit seal shall be provided in accordance with 501.15(A)(1)(1) and (A)(3). All portions of the conduit run or nipple between the seal and enclosure shall comply with 501.10(A). [501.15_(B)_(1)](https://2023.antflix.net#501.15_(B)_(1))", + "displayTitle": "(1) Entering Enclosures", + "children": [], + "url": "https://2023.antflix.net#501.15_(B)_(1)" + }, + { + "body": "A conduit seal shall be required in each conduit run leaving a Class I. Division 2 location. The sealing fitting shall be permitted to be installed on either side of the boundary within 3.05 m (10 ft) of the boundary and it shall be designed and installed to minimize the amount of gas or vapor within the portion of the conduit installed in the Division 2 location that can be communicated beyond the seal. Wiring methods permitted in 501.10(B)(1)(1) or (B)(1)(6) shall be used between the sealing fitting and the point at which the conduit leaves the Division 2 location, and a threaded connection shall be used at the sealing fitting. The conduit run between the conduit seal and the point at which the conduit leaves the Division 2 location shall contain no union, coupling, box, or other fitting except for a listed explosionproof reducer installed at the conduit seal. Such seals shall not be required to be explosionproof but shall be identified for the purpose of minimizing the passage of gases permitted under normal operating conditions and shall be accessible. Informational Note No. 1: See ANSI/UL 514B, Conduit, Tubing, and Cable Fittings, for additional information. Exception No. 1: Metal conduit that contains no unions, couplings, boxes, or fittings and that passes completely through a Division 2 location with no fittings installed within 300 mm (12 in.) of either side of the boundary shall not require a seal if the termination points of the unbroken conduit are located in unclassified locations. Exception No. 2: Conduit terminating in an unclassified location where the metal conduit transitions to cable tray, cablebus, ventilated busway, or Type MI cable, or to cable not installed in any cable tray or raceway system, shall not require a seal where passing from the Division 2 location into the unclassified location under the following conditions: (1) The unclassified location is outdoors, or the unclassified location is indoors and the conduit system is entirely in one room. (2) The conduits do not terminate at an enclosure containing an ignition source in normal operation. Exception No. 3: Conduit passing from an enclosure or a room permitted to use general-purpose equipment as a result of pressurization into a Division 2 location shall not require a seal at the boundary. Informational Note No. 2: See NFPA 496, Standard for Purged and Pressurized Enclosures for Electrical Equipment, for further information. Exception No. 4: Aboveground conduit shall not require a seal where passing from a Division 2 location into an unclassified location if all of the following conditions are met: (1) No part of the conduit passes through a Division 1 location where the conduit contains unions, couplings, boxes, or fittings that are located within 300 mm (12 in.) of the Division 1 location. (2) The conduit is located entirely outdoors. (3) The conduit is not directly connected to canned pumps, process or service connections for flow, pressure, or analysis measurement, and so forth, that depend on a single compression seal, diaphragm, or tube to prevent flammable or combustible fluids from entering the conduit system. (4) The conduit contains only threaded metal conduit, unions, couplings, conduit bodies, and fillings in the unclassified location. (5) The conduit is sealed at its entry to each enclosure or fitting located in the Division 2 location that contains terminals, splices, or taps. [501.15_(B)_(2)](https://2023.antflix.net#501.15_(B)_(2))", + "displayTitle": "(2) Class I, Division 2 Boundary", + "children": [], + "url": "https://2023.antflix.net#501.15_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#501.15_(B)" + }, + { + "body": "Seals installed in Class I, Division 1 and Division 2 locations shall comply with 501.15(C)(1) through (C)(6). Exception: Seals that are not required to be explosionproof by 501.15(B)(2) or 504. 70 shall not be required to comply with 501.15(C). [501.15_(C)](https://2023.antflix.net#501.15_(C))", + "displayTitle": "(C) Class I, Divisions 1 and 2", + "children": [ + { + "body": "Enclosures that contain connections or equipment shall be provided with an integral sealing means, or sealing fittings listed for the location shall be used. Sealing fittings shall be listed for use with one or more specific compounds and shall be accessible. [501.15_(C)_(1)](https://2023.antflix.net#501.15_(C)_(1))", + "displayTitle": "(1) Fittings", + "children": [], + "url": "https://2023.antflix.net#501.15_(C)_(1)" + }, + { + "body": "The compound shall provide a seal to minimize the passage of gas and/or vapors through the sealing fitting and shall not be affected by the surrounding atmosphere or liquids. The melting point of the compound shall not be less than 93\u00b0C (200\u00b0F). [501.15_(C)_(2)](https://2023.antflix.net#501.15_(C)_(2))", + "displayTitle": "(2) Compound", + "children": [], + "url": "https://2023.antflix.net#501.15_(C)_(2)" + }, + { + "body": "The thickness of the sealing compound installed in completed seals, other than listed cable sealing fittings, shall not be less than the metric designator (trade size) of the sealing fitting expressed in the units of measurement employed; however, in no case shall the thickness of the compound be less than 16 mm (5/8 in.). [501.15_(C)_(3)](https://2023.antflix.net#501.15_(C)_(3))", + "displayTitle": "(3) Thickness of Compounds", + "children": [], + "url": "https://2023.antflix.net#501.15_(C)_(3)" + }, + { + "body": "Splices and taps shall not be made in fittings intended only for sealing with compound; nor shall other fittings in which splices or taps are made be filled with compound. [501.15_(C)_(4)](https://2023.antflix.net#501.15_(C)_(4))", + "displayTitle": "(4) Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#501.15_(C)_(4)" + }, + { + "body": "An entire assembly shall be identified for the location where the equipment that may produce arcs, sparks, or high temperatures is located in a compartment that is separate from the compartment containing splices or taps, and an integral seal is provided where conductors pass from one compartment to the other. In Division 1 locations, seals shall be provided in conduit connecting to the compartment containing splices or taps where required by 501.15(A)(1)(2). [501.15_(C)_(5)](https://2023.antflix.net#501.15_(C)_(5))", + "displayTitle": "(5) Assemblies", + "children": [], + "url": "https://2023.antflix.net#501.15_(C)_(5)" + }, + { + "body": "The cross-sectional area of the conductors or optical fiber tubes (metallic or nonmetallic) permitted in a seal shall not exceed 25 percent of the cross-sectional area of a rigid metal conduit of the same trade size unless the seal is specifically identified for a higher percentage of fill. [501.15_(C)_(6)](https://2023.antflix.net#501.15_(C)_(6))", + "displayTitle": "(6) Conductor or Optical Fiber Fill", + "children": [], + "url": "https://2023.antflix.net#501.15_(C)_(6)" + } + ], + "url": "https://2023.antflix.net#501.15_(C)" + }, + { + "body": "In Division 1 locations, cable seals shall be located according to 501.15(D)(1) through (D)(3). [501.15_(D)](https://2023.antflix.net#501.15_(D))", + "displayTitle": "(D) Cable Seals, Class I, Division 1", + "children": [ + { + "body": "Cables shall be sealed at all terminations with sealing fittings. The seals at all terminations shall be in accordance with 501.15(C) and shall be installed within 450 mm (18 in.) of the enclosure or as required by the enclosure marking. Only threaded couplings or explosionproof fittings such as unions, reducers, elbows, and capped elbows not larger than the trade size of the conduit shall be permitted between the sealing fitting and the enclosure. Type MC-HL cable with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymeric material, Type TC-ER-HL cable, and Type P cable shall be sealed with a listed fitting after the jacket and any other covering have been removed so that the sealing compound can surround each individual insulated conductor to minimize the passage of gases and vapors. Shielded cables and twisted pair cables that have their conductors sealed in accordance with the instructions provided with their listed fitting to minimize the entrance of gases or vapors and prevent propagation of flame into the cable core shall not be required to have the shielding material removed or the twisted pairs separated. [501.15_(D)_(1)](https://2023.antflix.net#501.15_(D)_(1))", + "displayTitle": "(1) At Terminations", + "children": [], + "url": "https://2023.antflix.net#501.15_(D)_(1)" + }, + { + "body": "Cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core, installed in conduit, shall be sealed in the Class I, Division 1 location after the jacket and any other coverings have been removed such that the sealing compound can surround each individual insulated conductor or optical fiber tube and the outer jacket. Exception: Multiconductor cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall be permitted to be considered a single conductor if the cable is sealed in the conduit within 450 mm (18 in.) of the enclosure and the cable end is sealed within the enclosure, by an approved means to minimize the. entrance of gases or vapors and prevent the propagation of flame into the cable core, or by other approved methods. If both requirements are met, the shielding material shall not be required to be removed and the twisted pairs of shielded cables and twisted pair cables shall not be required to be separated. [501.15_(D)_(2)](https://2023.antflix.net#501.15_(D)_(2))", + "displayTitle": "(2) Cables Capable of Transmitting Gases or Vapors", + "children": [], + "url": "https://2023.antflix.net#501.15_(D)_(2)" + }, + { + "body": "Each multiconductor cable installed in conduit shall be considered as a single conductor if the cable is incapable of transmitting gases or vapors through the cable core. These cables shall be sealed in accordance with 501.15(A). [501.15_(D)_(3)](https://2023.antflix.net#501.15_(D)_(3))", + "displayTitle": "(3) Cables Incapable of Transmitting Gases or Vapors", + "children": [], + "url": "https://2023.antflix.net#501.15_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#501.15_(D)" + }, + { + "body": "In Division 2 locations, cable seals shall be located in accordance with 501.15(E)(1) through (E)(4). Exception: Cables with an unbroken gas/vaportight, continuous sheath shall be permitted to pass through a Division 2 location without seals. [501.15_(E)](https://2023.antflix.net#501.15_(E))", + "displayTitle": "(E) Cable Seals, Class I, Division 2", + "children": [ + { + "body": "Cables entering enclosures that are required to be explosionproof shall be sealed at the point of entrance into the enclosure. The sealing fitting shall comply with 501.15(B)(1) or be explosionproof. Multiconductor or optical multifiber cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core that are installed in a Division 2 location shall be sealed with a listed fitting after the jacket and any other coverings have been removed so that the sealing compound surrounds each individual insulated conductor or optical fiber tube to minimize the passage of gases and vapors. Multiconductor or optical multifiber cables installed in conduit shall be sealed in accordance with 501.15(D). Exception No. 1: Cables leaving art enclosure or room that is permitted to use general-purpose equipment as a result of Type Z pressurization and entering a Division 2 location shall not require a seal at the boundary. Exception No. 2: Removal of shielding material from shielded cables and separation of twisted pair cables shall not be required if the conductors are sealed in accordance with instructions provided with the listed fitting to minimize the entrance of gases or vapors and prevent propagation of flame into the cable core. [501.15_(E)_(1)](https://2023.antflix.net#501.15_(E)_(1))", + "displayTitle": "(1) Terminations", + "children": [], + "url": "https://2023.antflix.net#501.15_(E)_(1)" + }, + { + "body": "Cables that have a gas/vaportight continuous sheath and do not transmit gases or vapors through the cable core in excess of the quantity permitted for seal fittings shall not be required to be sealed except as required in 501.15(E)(1). The minimum length of such a cable run shall not be less than the length needed to limit gas or vapor flow through the cable core, excluding the interstices of the conductor strands, to the rate permitted for seal fittings [200 cm3/hr (0.007 ft3/hr) of air at a pressure of 1500 pascals (6 in. of water)]. [501.15_(E)_(2)](https://2023.antflix.net#501.15_(E)_(2))", + "displayTitle": "(2) Cables That Do Not Transmit Gases or Vapors", + "children": [], + "url": "https://2023.antflix.net#501.15_(E)_(2)" + }, + { + "body": "Cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall not be required to be sealed except as required in 501.15(E)(1), unless the cable is attached to process equipment or devices that may cause a pressure in excess of 1500 pascals (6 in. of water) to be exerted at a cable end, in which case a seal, a barrier, or other means shall be provided to prevent migration of flammables into an unclassified location. [501.15_(E)_(3)](https://2023.antflix.net#501.15_(E)_(3))", + "displayTitle": "(3) Cables Capable of Transmitting Gases or Vapors", + "children": [], + "url": "https://2023.antflix.net#501.15_(E)_(3)" + }, + { + "body": "Cables that do not have a gas/vaportight continuous sheath shall be sealed at the boundary of the Division 2 and unclassified location in such a manner as to minimize the passage of gases or vapors into an unclassified location. [501.15_(E)_(4)](https://2023.antflix.net#501.15_(E)_(4))", + "displayTitle": "(4) Cables Without Gas/Vaportight Sheath", + "children": [], + "url": "https://2023.antflix.net#501.15_(E)_(4)" + } + ], + "url": "https://2023.antflix.net#501.15_(E)" + }, + { + "displayTitle": "(F) Drainage", + "children": [ + { + "body": "Where there is a probability that liquid or other condensed vapor may be trapped within enclosures for control equipment or at any point in the raceway system, approved means shall be provided to prevent accumulation or to permit periodic draining of such liquid or condensed vapor. [501.15_(F)_(1)](https://2023.antflix.net#501.15_(F)_(1))", + "displayTitle": "(1) Control Equipment", + "children": [], + "url": "https://2023.antflix.net#501.15_(F)_(1)" + }, + { + "body": "Where liquid or condensed vapor may accumulate within motors or generators, joints and conduit systems shall be arranged to minimize the entrance of liquid. If means to prevent accumulation or to permit periodic draining are necessary, such means shall be provided at the time of manufacture and shall be considered an integral part of the machine. [501.15_(F)_(2)](https://2023.antflix.net#501.15_(F)_(2))", + "displayTitle": "(2) Motors and Generators", + "children": [], + "url": "https://2023.antflix.net#501.15_(F)_(2)" + } + ], + "url": "https://2023.antflix.net#501.15_(F)" + } + ], + "url": "https://2023.antflix.net#501.15" + }, + { + "body": "Process-connected equipment, including, but not limited to, canned pumps, submersible pumps, and flow, pressure, temperature, or analysis measurement instruments, shall be sealed with process seals. A process seal shall be a device that prevents the migration of process fluids from the designed containment into the external electrical system. Process-connected electrical equipment that incorporates a single process seal, such as a single compression seal, diaphragm, or tube to prevent flammable or combustible fluids from entering a conduit or cable system capable of transmitting fluids, shall be provided with an additional means to mitigate a single process seal failure. The additional means might include, but are not limited to, the following: A suitable barrier meeting the process temperature and pressure conditions that the barrier will be subjected to upon failure of the single process seal. There shall be a vent or drain between the single process seal and the suitable barrier. Indication of the single process seal failure shall be provided by visible leakage, an audible whistle, or other means of monitoring.A listed Type MI cable assembly, rated at not less than 125 percent of the process pressure and not less than 125 percent of the maximum process temperature (in degrees Celsius), installed between the cable or conduit and the single process seal.A drain or vent located between the single process seal and a conduit or cable seal. The drain or vent shall be sufficiently sized to prevent overpressuring the conduit or cable seal above 6 in. water column (1493 Pa). Indication of the single process seal failure shall be provided by visible leakage, an audible whistle, or other means of monitoring.An add-on secondary seal marked \"secondary seal\" and rated for the pressure and temperature conditions to which it will be subjected upon failure of the single process seal.Process-connected electrical equipment that does not rely on a single process seal or is listed and marked \"single seal\", \"dual seal\", or \"dual seal without annunciation\" shall not be required to be provided with an additional means of sealing.Process-connected electrical equipment marked \"single seal - install conduit or cable seal\" shall be sealed in accordance with 501.15.Informational Note: See ANSI/UL 122701, Requirements for Process Sealing Between Electrical Systems and Flammable or Combustible Process Fluids, for construction and testing requirements for process sealing of listed and marked single seal, dual seal, or secondary seal equipment. [501.17](https://2023.antflix.net#501.17)", + "displayTitle": "501.17 Process Sealing", + "children": [], + "url": "https://2023.antflix.net#501.17" + }, + { + "body": "Where condensed vapors or liquids may collect on, or come in contact with, the insulation on conductors, such insulation shall be of a type identified for use under such conditions; or the insulation shall be protected by a sheath of lead or by other approved means. [501.20](https://2023.antflix.net#501.20)", + "displayTitle": "501.20 Conductor Insulation, Class I, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#501.20" + }, + { + "body": "There shall be no uninsulated exposed parts, such as electrical conductors, buses, terminals, or components, that operate at more than 30 volts (15 volts in wet locations). These parts shall additionally be protected by a protection technique according to 500.7(E), (F), or (G) that is suitable for the location. [501.25](https://2023.antflix.net#501.25)", + "displayTitle": "501.25 Uninsulated Exposed Parts, Class I, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#501.25" + }, + { + "body": "Regardless of the voltage of the electrical system, wiring systems and equipment shall comply with 501.30(A) and (B). [501.30](https://2023.antflix.net#501.30)", + "displayTitle": "501.30 Grounding and Bonding", + "children": [ + { + "body": "Wiring systems and equipment shall be grounded in accordance with Part I and Part VI of Article 250, as applicable. [501.30_(A)](https://2023.antflix.net#501.30_(A))", + "displayTitle": "(A) Grounding", + "children": [], + "url": "https://2023.antflix.net#501.30_(A)" + }, + { + "body": "Bonding shall comply with Part I and Part V of Article 250, as applicable, and 501.30(B)(1) and (B)(2). [501.30_(B)](https://2023.antflix.net#501.30_(B))", + "displayTitle": "(B) Bonding", + "children": [ + { + "body": "Bonding shall comply with 501.30(B)(1)(a) and (B)(1)(b). The locknut-bushing and double-locknut types of contacts shall not be depended on for bonding purposes, but bonding jumpers with identified fittings or other approved means of bonding shall be used. These bonding means shall apply to all metal raceways, fittings, boxes, cable trays, and enclosures, and other parts of raceway systems between Class I locations and the point of grounding for service equipment or point of grounding for a separately derived system. Metal struts, angles, or channels provided for support and mechanical or physical protection as permitted in 335.4(5), 336.10(7)(c), or 722.135(C) shall be bonded in accordance with 250.102.Where the branch-circuit overcurrent protection is located on the load side of the disconnecting means, the specific bonding means shall be permitted to end at the nearest point where the grounded circuit conductor and the grounding electrode conductor are connected together on the line side of the building or structure disconnecting means as specified in 250.32(B). [501.30_(B)_(1)](https://2023.antflix.net#501.30_(B)_(1))", + "displayTitle": "(1) Specific Bonding Means", + "children": [], + "url": "https://2023.antflix.net#501.30_(B)_(1)" + }, + { + "body": "Flexible metal conduit and liquidtight flexible metal conduit shall comply with 501.30(B)(2)(a) and (B)(2)(b). Flexible metal conduit and liquidtight flexible metal conduit shall include an equipment bonding jumper of the wire type in accordance with 250.102.In Class I, Division 2 locations, the bonding jumper shall not be required where all of the following conditions are met:Listed liquidtight flexible metal conduit 1.8 m (6 ft) or less in length, with fittings listed for grounding, is used.Overcurrent protection in the circuit is limited to 10 amperes or less.The load is part of a meter, instrument, or relay circuit. [501.30_(B)_(2)](https://2023.antflix.net#501.30_(B)_(2))", + "displayTitle": "(2) Flexible Metal Conduit and Liquidtight Flexible Metal Conduit", + "children": [], + "url": "https://2023.antflix.net#501.30_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#501.30_(B)" + } + ], + "url": "https://2023.antflix.net#501.30" + }, + { + "displayTitle": "501.35 Surge Protection", + "children": [ + { + "body": "Surge arresters, surge-protective devices, and capacitors shall be installed in enclosures identified for Class I, Division 1 locations. Surge-protective capacitors shall be of a type designed for specific duty. [501.35_(A)](https://2023.antflix.net#501.35_(A))", + "displayTitle": "(A) Class I, Division 1", + "children": [], + "url": "https://2023.antflix.net#501.35_(A)" + }, + { + "body": "Surge arresters and surge-protective devices shall be nonarcing, such as metal-oxide varistor (MOV) sealed type, and surge-protective capacitors shall be of a type designed for specific duty. Enclosures shall be permitted to be of the general-purpose type. Surge protection of types other than described in this paragraph shall be installed in enclosures identified for Class I, Division 1 locations. [501.35_(B)](https://2023.antflix.net#501.35_(B))", + "displayTitle": "(B) Class I, Division 2", + "children": [], + "url": "https://2023.antflix.net#501.35_(B)" + } + ], + "url": "https://2023.antflix.net#501.35" + }, + { + "displayTitle": "Part III Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_64_III" + }, + { + "displayTitle": "501.100 Transformers and Capacitors", + "children": [ + { + "body": "In Class I, Division 1 locations, transformers and capacitors shall comply with 501.100(A)(1) and (A)(2). [501.100_(A)](https://2023.antflix.net#501.100_(A))", + "displayTitle": "(A) Class I, Division 1", + "children": [ + { + "body": "Transformers and capacitors containing a liquid that will burn shall be installed only in vaults that comply with 450.41 through 450.48 and with (1) through (4) as follows: There shall be no door or other communicating opening between the vault and the Division 1 location.Ample ventilation shall be provided for the continuous removal of flammable gases or vapors.Vent openings or ducts shall lead to a safe location outside of buildings.Vent ducts and openings shall be of sufficient area to relieve explosion pressures within the vault, and all portions of vent ducts within the buildings shall be of reinforced concrete construction. [501.100_(A)_(1)](https://2023.antflix.net#501.100_(A)_(1))", + "displayTitle": "(1) Containing Liquid That Will Burn", + "children": [], + "url": "https://2023.antflix.net#501.100_(A)_(1)" + }, + { + "body": "Transformers and capacitors that do not contain a liquid that will burn shall be installed in vaults complying with 501.100(A)(1) or be identified for Class I locations. [501.100_(A)_(2)](https://2023.antflix.net#501.100_(A)_(2))", + "displayTitle": "(2) Not Containing Liquid That Will Burn", + "children": [], + "url": "https://2023.antflix.net#501.100_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#501.100_(A)" + }, + { + "body": "In Class I, Division 2 locations, transformers shall comply with 450.21 through 450.27, and capacitors shall comply with 460.3 through 460.28. [501.100_(B)](https://2023.antflix.net#501.100_(B))", + "displayTitle": "(B) Class I, Division 2", + "children": [], + "url": "https://2023.antflix.net#501.100_(B)" + } + ], + "url": "https://2023.antflix.net#501.100" + }, + { + "displayTitle": "501.105 Meters, Instruments, and Relays", + "children": [ + { + "body": "In Class I, Division 1 locations, meters, instruments, and relays, including kilowatt-hour meters, instrument transformers, resistors, rectifiers, and thermionic tubes, shall be provided with enclosures identified for Class I, Division 1 locations. Enclosures for Class I, Division 1 locations include explosionproof enclosures and purged and pressurized enclosures. Informational Note: See NFPA 496, Standard for Purged and Pressurized Enclosures for Electrical Equipment. [501.105_(A)](https://2023.antflix.net#501.105_(A))", + "displayTitle": "(A) Class I, Division 1", + "children": [], + "url": "https://2023.antflix.net#501.105_(A)" + }, + { + "body": "In Class I, Division 2 locations, meters, instruments, and relays shall comply with 501.105(B)(2) through (B)(6). [501.105_(B)](https://2023.antflix.net#501.105_(B))", + "displayTitle": "(B) Class I, Division 2", + "children": [ + { + "body": "Where an assembly is made up of components for which general-purpose enclosures are acceptable as provided in 501.105(B)(1), (B)(2), and (B)(3), a single general-purpose enclosure shall be acceptable for the assembly. Where such an assembly includes any of the equipment described in 501.105(B)(1), 501.105(B)(2), and 501.105(B)(3), the maximum obtainable surface temperature of any component of the assembly that exceeds 100\u00b0C shall be clearly and permanently indicated on the outside of the enclosure. Alternatively, equipment shall be permitted to be marked to indicate the temperature class for which it is suitable, using the temperature class (T Code) of Table 500.8(C)(4). [501.105_(B)_(1)](https://2023.antflix.net#501.105_(B)_(1))", + "displayTitle": "(1) General-Purpose Assemblies", + "children": [], + "url": "https://2023.antflix.net#501.105_(B)_(1)" + }, + { + "body": "Switches, circuit breakers, and make-and-break contacts of pushbuttons, relays, alarm bells, and horns shall have enclosures identified for Class I, Division 1 locations in accordance with 501.105(A). Exception: General-purpose enclosures shall be permitted if current-interrupting contacts comply with one of the following: (1) Are immersed in oil (2) Are enclosed within a chamber that is hermetically sealed against the entrance of gases or vapors (3) Are in nonincendive circuits (4) Are listed for Division 2 locations [501.105_(B)_(2)](https://2023.antflix.net#501.105_(B)_(2))", + "displayTitle": "(2) Contacts", + "children": [], + "url": "https://2023.antflix.net#501.105_(B)_(2)" + }, + { + "body": "Resistors, resistance devices, thermionic tubes, rectifiers, and similar equipment that are used in or in connection with meters, instruments, and relays shall comply with 501.105(A). Exception: General-purpose-type enclosures shall be permitted if such equipment is without make-and-break or sliding contacts [other than as provided in 501.105(B)(2)] and if the marked maximum operating temperature of any exposed surface will not exceed 80 percent of the autoignition temperature in degrees Celsius of the gas or vapor involved or has been tested and found incapable of igniting the gas or vapor. This exception shall not apply to thermionic tubes. [501.105_(B)_(3)](https://2023.antflix.net#501.105_(B)_(3))", + "displayTitle": "(3) Resistors and Similar Equipment", + "children": [], + "url": "https://2023.antflix.net#501.105_(B)_(3)" + }, + { + "body": "Transformer windings, impedance coils, solenoids, and other windings that do not incorporate sliding or make-or-break contacts shall be provided with enclosures. General-purpose-type enclosures shall be permitted. [501.105_(B)_(4)](https://2023.antflix.net#501.105_(B)_(4))", + "displayTitle": "(4) Without Make-or-Break Contacts", + "children": [], + "url": "https://2023.antflix.net#501.105_(B)_(4)" + }, + { + "body": "Where general-purpose enclosures are permitted in 501.105(B)(2) through (B)(4), fuses for overcurrent protection of instrument circuits not subject to overloading in normal use shall be permitted to be mounted in general-purpose enclosures if each such fuse is preceded by a switch complying with 501.105(B)(2). [501.105_(B)_(5)](https://2023.antflix.net#501.105_(B)_(5))", + "displayTitle": "(5) Fuses", + "children": [], + "url": "https://2023.antflix.net#501.105_(B)_(5)" + }, + { + "body": "To facilitate replacements, process control instruments shall be permitted to be connected through flexible cord and attachment plug and receptacle if all of the following conditions apply: The attachment plug and receptacle are listed for use in Class I, Division 2 locations and listed for use with flexible cords.Exception No. 1 to (1): A Class I, Division 2 listing shall not be required if the circuit involves only nonincendive field wiring.Exception No. 2 to (1): In restricted industrial establishments, the Class I, Division 2 listing shall not be required if the requirements of 501.105(B)(6)(2), (B)(6)(3), and (B)(6)(4) are satisfied and the receptacle carries a label warning against plugging or unplugging when energized.The flexible cord does not exceed 900 mm (3 ft), is of a type listed for extra-hard usage, or is listed for hard usage and protected by location.Only necessary receptacles are provided.Unless the attachment plug and receptacle are interlocked mechanically or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated, a switch complying with 501.105(B)(2) is provided so that the attachment plug or receptacle is not necessary to interrupt current.Exception to (4): The switch shall not be required if the circuit is nonincendive field wiring. [501.105_(B)_(6)](https://2023.antflix.net#501.105_(B)_(6))", + "displayTitle": "(6) Connections", + "children": [], + "url": "https://2023.antflix.net#501.105_(B)_(6)" + } + ], + "url": "https://2023.antflix.net#501.105_(B)" + } + ], + "url": "https://2023.antflix.net#501.105" + }, + { + "displayTitle": "501.115 Switches, Circuit Breakers, Motor Controllers, and Fuses", + "children": [ + { + "body": "In Class I, Division 1 locations, switches, circuit breakers, motor controllers, and fuses, including pushbuttons, relays, and similar devices, shall be provided with enclosures, and the enclosure in each case, together with the enclosed apparatus, shall be identified as a complete assembly for use in Class I locations. [501.115_(A)](https://2023.antflix.net#501.115_(A))", + "displayTitle": "(A) Class I, Division 1", + "children": [], + "url": "https://2023.antflix.net#501.115_(A)" + }, + { + "body": "Switches, circuit breakers, motor controllers, and fuses in Class I, Division 2 locations shall comply with 501.115(B)(1) through (B)(4). [501.115_(B)](https://2023.antflix.net#501.115_(B))", + "displayTitle": "(B) Class I, Division 2", + "children": [ + { + "body": "Circuit breakers, motor controllers, and switches intended to interrupt current in the normal performance of the function for which they are installed shall be provided with enclosures identified for Class I, Division 1 locations in accordance with 501.105(A), unless general-purpose enclosures are provided and any of the following apply: The interruption of current occurs within a chamber hermetically sealed against the entrance of gases and vapors.The current make-and-break contacts are oil-immersed and of the general-purpose type having a 50-mm (2-in.) minimum immersion for power contacts and a 25-mm (1-in.) minimum immersion for control contacts.The interruption of current occurs within an enclosure, identified for the location, and marked \"Leads Factory Sealed\", or \"Factory Sealed\", or \"Seal not Required\", or equivalent.The device is a solid state, switching control without contacts, where the surface temperature does not exceed 80 percent of the autoignition temperature in degrees Celsius of the gas or vapor involved. [501.115_(B)_(1)](https://2023.antflix.net#501.115_(B)_(1))", + "displayTitle": "(1) Type Required", + "children": [], + "url": "https://2023.antflix.net#501.115_(B)_(1)" + }, + { + "body": "Fused or unfused disconnect and isolating switches for transformers or capacitor banks that are not intended to interrupt current in the normal performance of the function for which they are installed shall be permitted to be installed in general-purpose enclosures. [501.115_(B)_(2)](https://2023.antflix.net#501.115_(B)_(2))", + "displayTitle": "(2) Isolating Switches", + "children": [], + "url": "https://2023.antflix.net#501.115_(B)_(2)" + }, + { + "body": "For the protection of motors, appliances, and lamps, other than as provided in 501.115(B)(4), standard plug or cartridge fuses shall be permitted, provided they are placed within enclosures identified for the location; or fuses shall be permitted if they are within general-purpose enclosures, and if they are of a type in which the operating element is immersed in oil or other approved liquid, or the operating element is enclosed within a chamber hermetically sealed against the entrance of gases and vapors, or the fuse is a nonindicating, filled, current-limiting type. [501.115_(B)_(3)](https://2023.antflix.net#501.115_(B)_(3))", + "displayTitle": "(3) Fuses", + "children": [], + "url": "https://2023.antflix.net#501.115_(B)_(3)" + }, + { + "body": "Listed cartridge fuses shall be permitted as supplementary protection within luminaires. [501.115_(B)_(4)](https://2023.antflix.net#501.115_(B)_(4))", + "displayTitle": "(4) Fuses Internal to Luminaires", + "children": [], + "url": "https://2023.antflix.net#501.115_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#501.115_(B)" + } + ], + "url": "https://2023.antflix.net#501.115" + }, + { + "body": "Transformers, impedance coils, and resistors used as, or in conjunction with, control equipment for motors, generators, and appliances shall comply with 501.120(A) and (B). [501.120](https://2023.antflix.net#501.120)", + "displayTitle": "501.120 Control Transformers and Resistors", + "children": [ + { + "body": "In Class I, Division 1 locations, transformers, impedance coils, and resistors, together with any switching mechanism associated with them, shall be provided with enclosures identified for Class I, Division 1 locations in accordance with 501.105(A). [501.120_(A)](https://2023.antflix.net#501.120_(A))", + "displayTitle": "(A) Class I, Division 1", + "children": [], + "url": "https://2023.antflix.net#501.120_(A)" + }, + { + "body": "In Class I, Division 2 locations, control transformers and resistors shall comply with 501.120(B)(1) through (B)(3). [501.120_(B)](https://2023.antflix.net#501.120_(B))", + "displayTitle": "(B) Class I, Division 2", + "children": [ + { + "body": "Switching mechanisms used in conjunction with transformers, impedance coils, and resistors shall comply with 501.115(B). [501.120_(B)_(1)](https://2023.antflix.net#501.120_(B)_(1))", + "displayTitle": "(1) Switching Mechanisms", + "children": [], + "url": "https://2023.antflix.net#501.120_(B)_(1)" + }, + { + "body": "Enclosures for windings of transformers, solenoids, or impedance coils shall be permitted to be of the general-purpose type. [501.120_(B)_(2)](https://2023.antflix.net#501.120_(B)_(2))", + "displayTitle": "(2) Coils and Windings", + "children": [], + "url": "https://2023.antflix.net#501.120_(B)_(2)" + }, + { + "body": "Resistors shall be provided with enclosures; and the assembly shall be identified for Class I locations, unless resistance is nonvariable and maximum operating temperature, in degrees Celsius, will not exceed 80 percent of the autoignition temperature of the gas or vapor involved or the resistor has been tested and found incapable of igniting the gas or vapor. [501.120_(B)_(3)](https://2023.antflix.net#501.120_(B)_(3))", + "displayTitle": "(3) Resistors", + "children": [], + "url": "https://2023.antflix.net#501.120_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#501.120_(B)" + } + ], + "url": "https://2023.antflix.net#501.120" + }, + { + "displayTitle": "501.125 Motors and Generators", + "children": [ + { + "body": "In Class I, Division 1 locations, motors, generators, and other rotating electrical machinery shall be one of the following: Identified for Class I, Division 1 locationsOf the totally enclosed type supplied with positive-pressure ventilation from a source of clean air with discharge to a safe area, so arranged to prevent energizing of the machine until ventilation has been established and the enclosure has been purged with at least 10 volumes of air, and so arranged to automatically deenergize the equipment when the air supply failsOf the totally enclosed inert gas\u2014filled type supplied with a suitable reliable source of inert gas for pressurizing the enclosure, with devices provided to ensure a positive pressure in the enclosure and arranged to automatically de-energize the equipment when the gas supply failsFor machines that are for use only in restricted industrial establishments, the machine is permitted to be of a type designed to be submerged in a liquid that is flammable only when vaporized and mixed with air. or in a gas or vapor at a pressure greater than atmospheric and that is flammable only when mixed with air; and the machine is so arranged to prevent energizing it until it has been purged with the liquid or gas to exclude air, and so arranged to automatically de-energize the equipment when the supply of liquid or gas or vapor fails or the pressure is reduced to atmosphericTotally enclosed motors of the types specified in 501.125(A)(2) or (A)(3) shall have no external surface with an operating temperature in degrees Celsius in excess of 80 percent of the autoignition temperature of the gas or vapor involved. Appropriate devices shall be provided to detect and automatically de-energize the motor or provide an adequate alarm if there is any increase in temperature of the motor beyond designed limits. Auxiliary equipment shall be of a type identified for the location in which it is installed. [501.125_(A)](https://2023.antflix.net#501.125_(A))", + "displayTitle": "(A) Class I, Division 1", + "children": [], + "url": "https://2023.antflix.net#501.125_(A)" + }, + { + "body": "In Class I, Division 2 locations, motors, generators, and other rotating electrical machinery shall comply with (1), (2), or (3). They shall also comply with (4) and (5), if applicable. Be identified for Class I, Division 2 locations, orBe identified for Class I, Division 1 locations where sliding contacts, centrifugal or other types of switching mechanism (including motor overcurrent, overloading, and overtemperature devices), or integral resistance devices, either while starting or while running, are employed, orBe open or nonexplosionproof enclosed motors, such as squirrel-cage induction motors without brushes, switching mechanisms, or similar arc-producing devices that are not identified for use in a Class I, Division 2 location.The exposed surface of space heaters used to prevent condensation of moisture during shutdown periods shall not exceed 80 percent of the autoignition temperature in degrees Celsius of the gas or vapor involved when operated at rated voltage, and the maximum space heater surface temperature [based on a 40\u00b0C or higher marked ambient] shall be permanently marked on a visible name-plate mounted on the motor. Otherwise, space heaters shall be identified for Class I, Division 2 locations.A sliding contact shaft bonding device used for the purpose of maintaining the rotor at ground potential, shall be permitted where the potential discharge energy is determined to be nonincendive for the application. The shaft bonding device shall be permitted to be installed on the inside or the outside of the motor.Informational Note No. 1: It is important to consider the temperature of internal and external surfaces that might be exposed to the flammable atmosphere.Informational Note No. 2: It is important to consider the risk of ignition due to currents arcing across discontinuities and overheating of parts in multisection enclosures of large motors and generators. Such motors and generators might need equipotential bonding jumpers across joints in the enclosure and from enclosure to ground. Where the presence of ignitible gases or vapors is suspected, clean-air purging might be needed immediately prior to and during start-up periods.Informational Note No. 3: See IEEE 1349, IEEE Guide for the Application of Electric Machines in Zone 2 and Class I, Division 2 Hazardous (Classified) Locations, for information on the application of rotating electric machines including shaft bonding devices and potential discharge energy calculations.Informational Note No. 4: See ANSI/UL 122001, General Requirements for Electrical Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Classified) Locations, for reciprocating engine\u2014driven generators, compressors, and other equipment installed in Class I, Division 2 locations. Reciprocating engine\u2014driven generators, compressors, and other equipment installed in Class I, Division 2 locations might present a risk of ignition of flammable materials associated with fuel, starting, and compression due to inadvertent release or equipment malfunction by the engine ignition system and controls.Informational Note No. 5: See UL 1836, Outline of Investigation for Electric Motors and Generators for Use in Class I, Division 2, Class I, Zone 2, Class II, Division 2 and Zone 22 Hazardous (Classified) Locations, for details of the evaluation process to determine incendivity. Refer to Annex A and Figure A1. [501.125_(B)](https://2023.antflix.net#501.125_(B))", + "displayTitle": "(B) Class I, Division 2", + "children": [], + "url": "https://2023.antflix.net#501.125_(B)" + } + ], + "url": "https://2023.antflix.net#501.125" + }, + { + "body": "Luminaires shall comply with 501.130(A) or (B). [501.130](https://2023.antflix.net#501.130)", + "displayTitle": "501.130 Luminaires", + "children": [ + { + "body": "In Class I, Division 1 locations, luminaires shall comply with 501.130(A)(1) through (A)(4). [501.130_(A)](https://2023.antflix.net#501.130_(A))", + "displayTitle": "(A) Class I, Division 1", + "children": [ + { + "body": "Each luminaire shall be identified as a complete assembly for the Class I, Division 1 location and shall be clearly marked to indicate the maximum wattage of lamps for which it is identified. Luminaires intended for portable use shall be specifically listed as a complete assembly for that use. [501.130_(A)_(1)](https://2023.antflix.net#501.130_(A)_(1))", + "displayTitle": "(1) Luminaires", + "children": [], + "url": "https://2023.antflix.net#501.130_(A)_(1)" + }, + { + "body": "Each luminaire shall be protected against physical damage by a suitable guard or by location. [501.130_(A)_(2)](https://2023.antflix.net#501.130_(A)_(2))", + "displayTitle": "(2) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#501.130_(A)_(2)" + }, + { + "body": "Pendant luminaires shall be suspended by and supplied through threaded rigid metal conduit stems or threaded steel intermediate conduit stems, and threaded joints shall be provided with set-screws or other effective means to prevent loosening. For stems longer than 300 mm (12 in.), permanent and effective bracing against lateral displacement shall be provided at a level not more than 300 mm (12 in.) above the lower end of the stem, or flexibility in the form of a fitting or flexible connector identified for the Class I, Division 1 location shall be provided not more than 300 mm (12 in.) from the point of attachment to the supporting box or fitting. [501.130_(A)_(3)](https://2023.antflix.net#501.130_(A)_(3))", + "displayTitle": "(3) Pendant Luminaires", + "children": [], + "url": "https://2023.antflix.net#501.130_(A)_(3)" + }, + { + "body": "Boxes, box assemblies, or fittings used for the support of luminaires shall be identified for Class I locations. [501.130_(A)_(4)](https://2023.antflix.net#501.130_(A)_(4))", + "displayTitle": "(4) Supports", + "children": [], + "url": "https://2023.antflix.net#501.130_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#501.130_(A)" + }, + { + "body": "In Class I, Division 2 locations, luminaires shall comply with 501.130(B)(1) through (B)(6). [501.130_(B)](https://2023.antflix.net#501.130_(B))", + "displayTitle": "(B) Class I, Division 2", + "children": [ + { + "body": "Where lamps are of a size or type that may, under normal operating conditions, reach surface temperatures exceeding 80 percent of the autoignition temperature in degrees Celsius of the gas or vapor involved, luminaires shall comply with 501.130(A)(1) or shall be of a type that has been tested in order to determine the marked operating temperature or temperature class (T code). [501.130_(B)_(1)](https://2023.antflix.net#501.130_(B)_(1))", + "displayTitle": "(1) Luminaires", + "children": [], + "url": "https://2023.antflix.net#501.130_(B)_(1)" + }, + { + "body": "Luminaires shall be protected from physical damage by suitable guards or by location. Where there is danger that falling sparks or hot metal from lamps or luminaires might ignite localized concentrations of flammable vapors or gases, suitable enclosures or other effective protective means shall be provided. [501.130_(B)_(2)](https://2023.antflix.net#501.130_(B)_(2))", + "displayTitle": "(2) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#501.130_(B)_(2)" + }, + { + "body": "Pendant luminaires shall be suspended by threaded rigid metal conduit stems, threaded steel intermediate metal conduit stems, or other approved means. For rigid stems longer than 300 mm (12 in.), permanent and effective bracing against lateral displacement shall be provided at a level not more than 300 mm (12 in.) above the lower end of the stem, or flexibility in the form of an identified fitting or flexible connector shall be provided not more than 300 mm (12 in.) from the point of attachment to the supporting box or fitting. [501.130_(B)_(3)](https://2023.antflix.net#501.130_(B)_(3))", + "displayTitle": "(3) Pendant Luminaires", + "children": [], + "url": "https://2023.antflix.net#501.130_(B)_(3)" + }, + { + "body": "Portable lighting equipment shall comply with 501.130(B)(4)(a) or (B)(4)(b). Portable lighting equipment shall comply with 501.130(B)(1).Portable lighting equipment mounted on movable stands and connected by flexible cords in accordance with 501.140 shall be permitted to comply with 501.130(B)(1), where mounted in any position, if it is protected from physical damage in accordance with 501.130(B)(2). [501.130_(B)_(4)](https://2023.antflix.net#501.130_(B)_(4))", + "displayTitle": "(4) Portable Lighting Equipment", + "children": [], + "url": "https://2023.antflix.net#501.130_(B)_(4)" + }, + { + "body": "Switches that are a part of a luminaire or of an individual lampholder shall comply with 501.115(B)(1). [501.130_(B)_(5)](https://2023.antflix.net#501.130_(B)_(5))", + "displayTitle": "(5) Switches", + "children": [], + "url": "https://2023.antflix.net#501.130_(B)_(5)" + }, + { + "body": "Starting and control equipment for electric-discharge lamps shall comply with 501.120(B). Exception: A thermal protector potted into a thermally protected fluorescent lamp ballast if the luminaire is identified for the location. [501.130_(B)_(6)](https://2023.antflix.net#501.130_(B)_(6))", + "displayTitle": "(6) Starting Equipment", + "children": [], + "url": "https://2023.antflix.net#501.130_(B)_(6)" + } + ], + "url": "https://2023.antflix.net#501.130_(B)" + } + ], + "url": "https://2023.antflix.net#501.130" + }, + { + "displayTitle": "501.135 Utilization Equipment", + "children": [ + { + "body": "In Class I, Division 1 locations, all utilization equipment shall be identified for Class I, Division 1 locations. [501.135_(A)](https://2023.antflix.net#501.135_(A))", + "displayTitle": "(A) Class I, Division 1", + "children": [], + "url": "https://2023.antflix.net#501.135_(A)" + }, + { + "body": "2. In Class I, Division 2 locations, all utilization equipment shall comply with 501.135(B)(1) through (B)(4). [501.135_(B)](https://2023.antflix.net#501.135_(B))", + "displayTitle": "(B) Class I, Division", + "children": [ + { + "body": "Electrically heated utilization equipment shall meet one of the following requirements: The heater shall not exceed 80 percent of the autoignition temperature in degrees Celsius of the gas or vapor involved on any surface that is exposed to the gas or vapor when continuously energized at the maximum rated ambient temperature. If a temperature controller is not provided, these conditions shall apply when the heater is operated at 120 percent of rated voltage.Exception No. 1 to (1): For motor-mounted anticondensation space heaters, see 501.125.Exception No. 2 to (1): Where a current-limiting device is applied to the circuit serving the heater to limit the current in the heater to a value less than that required to raise the heater surface temperature to 80 percent of the autoignition temperature.The heater shall be identified for Class I, Division 1 locations.Exception to (2): Electrical resistance and skin effect heat tracing identified for Class I, Division 2 locations shall be permitted.Informational Note No. 1: See ANSI/UL 60079-30-1, Explosive Atmospheres - Part 30-1: Electrical Resistance Trace Heating - General and Testing Requirements, for information on electric resistance heat tracing.Informational Note No. 2: See IEEE 844.1/CSA C22.2 No. 293.1, IEEE/CSA Standard for Skin Effect Trace Heating of Pipelines, Vessels, Equipment, and Structures - General, Testing, Marking, and Documentation Requirements, for information on electric skin effect heat tracing.Informational Note No. 3: See IEEE 844.3/CSA C22.2 No. 293.3, IEEE/CSA Standard for Impedance Heating of Pipelines and Equipment - General, Testing, Marking, and Documentation Requirements, for information on electric impedance heating. [501.135_(B)_(1)](https://2023.antflix.net#501.135_(B)_(1))", + "displayTitle": "(1) Heaters", + "children": [], + "url": "https://2023.antflix.net#501.135_(B)_(1)" + }, + { + "body": "Motors of motor-driven utilization equipment shall comply with 501.125(B). [501.135_(B)_(2)](https://2023.antflix.net#501.135_(B)_(2))", + "displayTitle": "(2) Motors", + "children": [], + "url": "https://2023.antflix.net#501.135_(B)_(2)" + }, + { + "body": "Switches, circuit breakers, and fuses shall comply with 501.115(B). [501.135_(B)_(3)](https://2023.antflix.net#501.135_(B)_(3))", + "displayTitle": "(3) Switches, Circuit Breakers, and Fuses", + "children": [], + "url": "https://2023.antflix.net#501.135_(B)_(3)" + }, + { + "body": "Luminaires shall comply with 501.130(B). [501.135_(B)_(4)](https://2023.antflix.net#501.135_(B)_(4))", + "displayTitle": "(4) Luminaires", + "children": [], + "url": "https://2023.antflix.net#501.135_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#501.135_(B)" + } + ], + "url": "https://2023.antflix.net#501.135" + }, + { + "displayTitle": "501.140 Flexible Cords. Class I, Divisions 1 and 2", + "children": [ + { + "body": "Flexible cord shall be permitted as follows: For connection between portable lighting equipment or other portable utilization equipment and the fixed portion of their supply circuit. The flexible cord shall be attached to the utilization equipment with a cord connector listed for the protection technique of the equipment wiring compartment. An attachment plug in accordance with 501.140(B)(4) shall be employed.For that portion of the circuit where the fixed wiring methods of 501.10(A) cannot provide the necessary degree of movement for fixed and mobile electrical utilization equipment, and the flexible cord is protected by location or by a suitable guard from damage and only in a restricted industrial establishment.For electric submersible pumps with means for removal without entering the wet-pit. The extension of the flexible cord within a suitable raceway between the wet-pit and the power source shall be permitted.For electric mixers intended for travel into and out of open-type mixing tanks or vats.For temporary portable assemblies consisting of receptacles, switches, and other devices that are not considered portable utilization equipment but are individually listed for the location. [501.140_(A)](https://2023.antflix.net#501.140_(A))", + "displayTitle": "(A) Permitted Uses", + "children": [], + "url": "https://2023.antflix.net#501.140_(A)" + }, + { + "body": "Where flexible cords are used, the cords shall comply with all of the following: Be of a type listed for extra-hard usageContain, in addition to the conductors of the circuit, an equipment grounding conductor complying with 400.23Be supported by clamps or by other suitable means in such a manner that there is no tension on the terminal connectionsIn Division 1 locations or in Division 2 locations where the boxes, fittings, or enclosures are required to be explosionproof, the cord shall be terminated with a cord connector or attachment plug listed for the location or a listed cord connector installed with a seal listed for the location. In Division 2 locations where explosionproof equipment is not required, the cord shall be terminated with a listed cord connector or listed attachment plug.Be of continuous length. Where 501.140(A)(5) is applied, cords shall be of continuous length from the power source to the temporary portable assembly and from the temporary portable assembly to the utilization equipment.Informational Note: See 501.20 for flexible cords exposed to liquids having a deleterious effect on the conductor insulation. [501.140_(B)](https://2023.antflix.net#501.140_(B))", + "displayTitle": "(B) Installation", + "children": [], + "url": "https://2023.antflix.net#501.140_(B)" + } + ], + "url": "https://2023.antflix.net#501.140" + }, + { + "body": "Flexible cables installed in Class I, Division 2 locations shall comply with 501.141 (A) and (B). [501.141](https://2023.antflix.net#501.141)", + "displayTitle": "501.141 Flexible Cables, Class I, Division 2", + "children": [ + { + "body": "Flexible cables shall be permitted to be installed in accordance with 501.141(A)(1) and (A)(2). [501.141_(A)](https://2023.antflix.net#501.141_(A))", + "displayTitle": "(A) Permitted Uses", + "children": [ + { + "body": "Flexible cables in other than nonincendive field wiring applications shall be permitted in accordance with the following: Flexible cables shall be permitted to connect two pieces of electrical equipment by means of a cable assembly installed in accordance with 501.141(B)(2)(a) or (B)(2)(b).Flexible cables shall be permitted to connect a piece of electrical equipment to the premises wiring by means of a cable assembly installed in accordance with 501.141(B)(2)(c). [501.141_(A)_(1)](https://2023.antflix.net#501.141_(A)_(1))", + "displayTitle": "(1) Other Than Nonincendive Field Wiring Applications", + "children": [], + "url": "https://2023.antflix.net#501.141_(A)_(1)" + }, + { + "body": "Flexible cables in nonincendive field wiring applications shall be permitted to be used in accordance with 501.10(B)(3). [501.141_(A)_(2)](https://2023.antflix.net#501.141_(A)_(2))", + "displayTitle": "(2) Nonincendive Field Wiring Applications", + "children": [], + "url": "https://2023.antflix.net#501.141_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#501.141_(A)" + }, + { + "body": "If flexible cables are used as permitted in 501.141(A), the associated cable assemblies shall comply with 501.141(B)(1) through (B)(3). [501.141_(B)](https://2023.antflix.net#501.141_(B))", + "displayTitle": "(B) Installation", + "children": [ + { + "body": "Listed Type P cables shall comply with 501.141(A)(1) and shall be installed as required in Part II of Article 337. The associated cable assemblies shall comply with the requirements of 501.141 (B)(2). [501.141_(B)_(1)](https://2023.antflix.net#501.141_(B)_(1))", + "displayTitle": "(1) Cable Types", + "children": [], + "url": "https://2023.antflix.net#501.141_(B)_(1)" + }, + { + "body": "Terminations shall comply with 501.141(B)(2)(a), (B)(2)(b), or (B)(2)(c). Connecting Two Devices or Pieces of Electrical Utilization Equipment Together. The cable connectors on each end of the cable shall be listed for use in Class I, Division 2 locations and listed for the type of cable being used.Connecting Two Devices or Pieces of Electrical Utilization Equipment Together. A cable connector listed for Class I, Division 2 and listed for the type of cable being used shall be used on one end and a fitting listed for the type of protection and the type of cable being used shall be used on the other end.Connecting an Electrical Device or Utilization Equipment to Premises Wiring. The cable connectors used on both ends shall be listed for Class I, Division 2 locations and for the type of cable being used. On one end of the cable, the cable connector shall also be listed for the type of protection. [501.141_(B)_(2)](https://2023.antflix.net#501.141_(B)_(2))", + "displayTitle": "(2) Termination Means", + "children": [], + "url": "https://2023.antflix.net#501.141_(B)_(2)" + }, + { + "body": "Flexible cable shall be installed in accordance with 501.141(B)(3)(a) through (B)(3)(c) to protect against the disconnection of the cable connectors when energized. Switch. A switch complying with the requirements of 501.105(B)(2) shall be provided to disconnect power so that cable connectors are not depended on as a disconnecting means.Cable Connectors Mechanically or Electrically Interlocked. Switches shall not be required where the cable connectors are interlocked mechanically or electrically, or are otherwise designed to ensure the cable connectors cannot be separated when energized and cannot be energized when separated.Warning Label. The fixed equipment and the cable assembly shall both carry a label warning against plugging or unplugging when energized, with both labels as close to the cable connector termination as possible. [501.141_(B)_(3)](https://2023.antflix.net#501.141_(B)_(3))", + "displayTitle": "(3) Disconnection", + "children": [], + "url": "https://2023.antflix.net#501.141_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#501.141_(B)" + } + ], + "url": "https://2023.antflix.net#501.141" + }, + { + "body": "Receptacles and attachment plugs shall be listed for the location, except as permitted by 501.105(B)(6). [501.145](https://2023.antflix.net#501.145)", + "displayTitle": "501.145 Receptacles and Attachment Plugs, Class I, Division 1 and Division 2", + "children": [ + { + "body": "Receptacles shall be part of the premises wiring, except as permitted by 501.140(A). [501.145_(A)](https://2023.antflix.net#501.145_(A))", + "displayTitle": "(A) Receptacles", + "children": [], + "url": "https://2023.antflix.net#501.145_(A)" + }, + { + "body": "Attachment plugs shall be of the type that provides connection to the equipment grounding conductor of a permitted flexible cord. [501.145_(B)](https://2023.antflix.net#501.145_(B))", + "displayTitle": "(B) Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#501.145_(B)" + } + ], + "url": "https://2023.antflix.net#501.145" + }, + { + "displayTitle": "501.150 Signaling, Alarm, Remote-Control, and Communications Systems", + "children": [ + { + "body": "In Class I, Division 1 locations, all apparatus and equipment of signaling, alarm, remote-control, and communications systems, regardless of voltage, shall be identified for Class I, Division 1 locations, and all wiring shall comply with 501.10(A), 501.15(A), and 501.15(C). [501.150_(A)](https://2023.antflix.net#501.150_(A))", + "displayTitle": "(A) Class I, Division 1", + "children": [], + "url": "https://2023.antflix.net#501.150_(A)" + }, + { + "body": "In Class I, Division 2 locations, signaling, alarm, remote-control, and communications systems shall comply with 501.150(B)(1) through (B)(4). [501.150_(B)](https://2023.antflix.net#501.150_(B))", + "displayTitle": "(B) Class I, Division 2", + "children": [ + { + "body": "Switches, circuit breakers, and make-and-break contacts of pushbuttons, relays, alarm bells, and horns shall have enclosures identified for Class I, Division 1 locations in accordance with 501.105(A). Exception: General-purpose enclosures shall be permitted if current-interrupting contacts are one of the following: (1) Immersed in oil (2) Enclosed within a chamber hermetically sealed against the entrance of gases or vapors (3) In nonincendive circuits (4) Part of a listed nonincendive component [501.150_(B)_(1)](https://2023.antflix.net#501.150_(B)_(1))", + "displayTitle": "(1) Contacts", + "children": [], + "url": "https://2023.antflix.net#501.150_(B)_(1)" + }, + { + "body": "Resistors, resistance devices, thermionic tubes, rectifiers, and similar equipment shall comply with 501.105(B)(3). [501.150_(B)_(2)](https://2023.antflix.net#501.150_(B)_(2))", + "displayTitle": "(2) Resistors and Similar Equipment", + "children": [], + "url": "https://2023.antflix.net#501.150_(B)_(2)" + }, + { + "body": "Enclosures shall be provided for lightning protective devices and for fuses. Such enclosures shall be permitted to be of the general-purpose type. [501.150_(B)_(3)](https://2023.antflix.net#501.150_(B)_(3))", + "displayTitle": "(3) Protectors", + "children": [], + "url": "https://2023.antflix.net#501.150_(B)_(3)" + }, + { + "body": "All wiring shall comply with 501.10(B), 501.15(B), and 501.15(C). [501.150_(B)_(4)](https://2023.antflix.net#501.150_(B)_(4))", + "displayTitle": "(4) Wiring and Sealing", + "children": [], + "url": "https://2023.antflix.net#501.150_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#501.150_(B)" + } + ], + "url": "https://2023.antflix.net#501.150" + } + ], + "url": "https://2023.antflix.net#501" + }, + { + "displayTitle": "Article 502 Class II Locations", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_74_I" + }, + { + "body": "This article covers the requirements for electrical and electronic equipment and wiring for all voltages in Class II, Division 1 and 2 locations where fire or explosion hazards may exist due to combustible dust. [502.1](https://2023.antflix.net#502.1)", + "displayTitle": "502.1 Scope", + "children": [], + "url": "https://2023.antflix.net#502.1" + }, + { + "body": "Explosionproof equipment and wiring shall not be required and shall not be acceptable in Class II locations unless also identified for such locations. [502.5](https://2023.antflix.net#502.5)", + "displayTitle": "502.5 Explosionproof Equipment", + "children": [], + "url": "https://2023.antflix.net#502.5" + }, + { + "body": "Equipment listed and marked in accordance with 506.9(C)(2) for Zone 20 locations shall be permitted in Class II, Division 1 locations for the same dust atmosphere; and with a suitable temperature class. Equipment listed and marked in accordance with 506.9(C)(2) for Zone 20, 21, or 22 locations shall be permitted in Class II, Division 2 locations for the same dust atmosphere and with a suitable temperature class. [502.6](https://2023.antflix.net#502.6)", + "displayTitle": "502.6 Zone Equipment", + "children": [], + "url": "https://2023.antflix.net#502.6" + }, + { + "displayTitle": "Part II Wiring", + "children": [], + "url": "https://2023.antflix.net#divider_74_II" + }, + { + "body": "Wiring methods shall comply with 502.10(A) or (B). Informational Note: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations]. [502.10](https://2023.antflix.net#502.10)", + "displayTitle": "502.10 Wiring Methods", + "children": [ + { + "displayTitle": "(A) Class II, Division 1", + "children": [ + { + "body": "In Class II, Division 1 locations, the following wiring methods shall be permitted: Threaded rigid metal conduit (RMC) or threaded intermediate metal conduit (IMC), including conduit systems with supplemental corrosion protection coatings.Type MI cable with termination fittings listed for the location. Type MI cable shall be installed and supported in a manner to avoid tensile stress at the termination fittings.In restricted industrial establishments, Type MC-HL. cable, listed for use in Class II, Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath, an overall jacket of suitable polymeric material, a separate equipment grounding conductor(s) in accordance with 250.122, and provided with termination fittings listed for the location, shall be permitted.Optical fiber cable Type OFNP, Type OFCP, Type OFNR, Type OFCR, Type OFNG, Type OFCG, Type OFN, or Type OFC shall be permitted to be installed in raceways in accordance with 502.10(A). Optical fiber cables shall be sealed in accordance with 502.15.In restricted industrial establishments, listed Type ITC-HL cable with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymeric material, and terminated with fittings listed for the application, and installed in accordance with 335.4.In restricted industrial establishments, for applications limited to 600 volts nominal or less, where the cable is not subject to physical damage and is terminated with fittings listed for the location, listed Type TC-ER-HL cable. When installed in ladder, ventilated trough, or ventilated channel cable trays, cables shall be installed in a single layer, with a space not less than the larger cable diameter between the two adjacent cables unless otherwise protected against dust buildup resulting in increased heat, Type TC-ER-HL cable shall be installed in accordance with 336.10.Informational Note No. 1: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for construction, testing, and marking of cables and cable fittings.In restricted industrial establishments, listed Type P cable with metal braid armor, with an overall jacket, that is terminated with fittings listed for the location and installed in accordance with 337.10. When installed in ladder, ventilated trough, or ventilated channel cable trays, cables shall be installed in a single layer, with a space not less than the larger cable diameter between the two adjacent cables, unless otherwise protected against dust buildup resulting in increased heat.Informational Note No. 2: See ANSI/UL 1309, Marine Shipboard Cable, for information on construction, testing, and marking of Type P cable.Informational Note No. 3: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cable fittings. [502.10_(A)_(1)](https://2023.antflix.net#502.10_(A)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#502.10_(A)_(1)" + }, + { + "body": "Where flexible connections are necessary, one or more of the following shall also be permitted: Dusttight flexible connectors.Liquidtight flexible metal conduit (LFMC) with listed fittings and bonded in accordance with 502.30(B).Liquidtight flexible nonmetallic conduit (LFNC) with listed fittings.Interlocked armor Type MC cable having an overall jacket of suitable polymeric material and provided with termination fittings listed for Class II, Division 1 locations.Flexible cord listed for extra-hard usage and terminated with listed dusttight cord connectors. Where used, flexible cords shall comply with 502.140.For elevator use, an identified elevator cable of Type EO, Type ETP, or Type ETT, shown under the \"use\" column in Table 400.4 for \"hazardous (classified) locations\" and terminated with listed dusttight fittings.In restricted industrial establishments, for applications limited to 600 volts nominal or less, and where the cable is not subject to physical damage and is terminated with fittings listed for the location, listed Type TC-ER-HL cable. Type TC-ER-HL cable shall be installed in accordance with 336.10.Informational Note No. 1: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for construction, testing, and marking of cables and cable fittings.In restricted industrial establishments, listed Type P cable with metal braid armor, with an overall jacket, terminated with fittings listed for the location, and installed in accordance with 337.10.Informational Note No. 2: See UL 1309A, Outline of Investigation for Cable for Use in Mobile Installations, for information on construction, testing, and marking of Type P cable.Informational Note No. 3: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cable fittings. [502.10_(A)_(2)](https://2023.antflix.net#502.10_(A)_(2))", + "displayTitle": "(2) Flexible Connections", + "children": [], + "url": "https://2023.antflix.net#502.10_(A)_(2)" + }, + { + "body": "Boxes and fittings shall be provided with threaded bosses for connection to conduit or cable terminations and shall be dusttight. Boxes and fittings in which taps, joints, or terminal connections are made, or that are used in Group E locations, shall be identified for Class II locations. Informational Note: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cables, dust-ignitionproof cable fittings, and dust-ignitionproof cord connectors for entry into enclosures required to be dust-ignitionproof. [502.10_(A)_(3)](https://2023.antflix.net#502.10_(A)_(3))", + "displayTitle": "(3) Boxes and Fittings", + "children": [], + "url": "https://2023.antflix.net#502.10_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#502.10_(A)" + }, + { + "body": "Wiring methods installed in Class II, Division 2 locations shall be in accordance with 502.10(B)(1) through (B)(4). [502.10_(B)](https://2023.antflix.net#502.10_(B))", + "displayTitle": "(B) Class II, Division 2", + "children": [ + { + "body": "In Class II, Division 2 locations, the following wiring methods shall be permitted: All wiring methods permitted in 502.10(A).Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with listed threaded or threadless fittings, including conduit systems with supplemental corrosion protection coatings.Dusttight wireways or electrical metallic tubing (EMT) with listed compression-type connectors or listed compression-type couplings.Type MC, Type MV, Type TC, or Type TC-ER cable, including installation in cable tray systems. Type TC-ER cable shall include an equipment grounding conductor in addition to a drain wire that might be present. The cable shall be terminated with listed fittings.Type PLTC cable or Type PLTC-ER cable used in Class 2 or Class 3 circuits, including installation in cable tray systems. The cable shall be terminated with listed fittings. Type PLTC-ER cable shall include an equipment grounding conductor in addition to a drain wire that might be present.Type ITC cable or Type ITC-ER cable as permitted in 335.4 and terminated with listed fittings. Type ITC-ER cable shall include an equipment grounding conductor in addition to a drain wire.In restricted industrial establishments where wiring methods in 502.10(B)(1)(1)(2) will not provide the corrosion resistance required for the installation environment, either of the following:Listed reinforced thermosetting resin conduit (RTRC), factory elbows, and associated fittings, all marked with suffix -XWSchedule 80 PVC conduit, factory elbows, and associated fittingsOptical fiber cable Type OFNP, Type OFCP, Type OFNR, Type OFCR, Type OFNG, Type OFCG, Type OFN, or Type OFC, installed in cable trays or any other raceway in accordance with 502.10(B). Optical fiber cables shall be sealed in accordance with 502.15.Cablebus.In restricted industrial establishments, listed Type P cable with or without metal braid armor, with an overall jacket, that is terminated with listed fittings and installed in accordance with 337.10.Informational Note: See UL 1309A, Outline of Investigation for Cable for Use in Mobile Installations, for information on construction, testing, and marking of Type P cable. [502.10_(B)_(1)](https://2023.antflix.net#502.10_(B)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#502.10_(B)_(1)" + }, + { + "body": "If flexibility is necessary, 502.10(A)(2) shall apply. [502.10_(B)_(2)](https://2023.antflix.net#502.10_(B)_(2))", + "displayTitle": "(2) Flexible Connections", + "children": [], + "url": "https://2023.antflix.net#502.10_(B)_(2)" + }, + { + "body": "Nonincendive field wiring shall be permitted using any of the wiring methods permitted for unclassified locations. Nonincendive field wiring systems shall be installed in accordance with the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted in a nonincendive field wiring circuit if the simple apparatus does not interconnect the nonincendive field wiring circuit to any other circuit. Informational Note: See Article 100 for the definition of simple apparatus. Separate nonincendive field wiring circuits shall be installed in accordance with one of the following:In separate cablesIn multiconductor cables where the conductors of each circuit are within a grounded metal shieldIn multiconductor cables or in raceways where the conductors of each circuit have insulation with a minimum thickness of 0.25 mm (0.01 in.) [502.10_(B)_(3)](https://2023.antflix.net#502.10_(B)_(3))", + "displayTitle": "(3) Nonincendive Field Wiring", + "children": [], + "url": "https://2023.antflix.net#502.10_(B)_(3)" + }, + { + "body": "All boxes and fittings shall be dust-tight. [502.10_(B)_(4)](https://2023.antflix.net#502.10_(B)_(4))", + "displayTitle": "(4) Boxes and Fittings", + "children": [], + "url": "https://2023.antflix.net#502.10_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#502.10_(B)" + } + ], + "url": "https://2023.antflix.net#502.10" + }, + { + "body": "If a raceway provides communication between an enclosure that is required to be dust-ignitionproof and one that is not, suitable means shall be provided to prevent the entrance of dust into the dust-ignitionproof enclosure through the raceway. One of the following means shall be permitted: A permanent and effective sealA horizontal raceway not less than 3.05 m (10 ft) longA vertical raceway not less than 1.5 m (5 ft) long and extending downward from the dust-ignitionproof enclosureA raceway installed in a manner equivalent to 502.15(2) or (3) that extends only horizontally and downward from the dust-ignition proof enclosuresElectrical sealing puttyIf a raceway provides communication between an enclosure that is required to be dust-ignitionproof and an enclosure in an unclassified location, seals shall not be required.Sealing fittings shall be accessible and shall not be required to be explosionproof. [502.15](https://2023.antflix.net#502.15)", + "displayTitle": "502.15 Sealing, Class II. Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#502.15" + }, + { + "body": "There shall be no uninsulated exposed parts, such as electrical conductors, buses, terminals, or components, that operate at more than 30 volts (15 volts in wet locations). These parts shall additionally be protected by a protection technique according to 500.7(E), (F), or (G) that is suitable for the location. [502.25](https://2023.antflix.net#502.25)", + "displayTitle": "502.25 Uninsulated Exposed Parts, Class II, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#502.25" + }, + { + "body": "Regardless of the voltage of the electrical system, wiring systems and equipment shall comply with 502.30(A) and (B). [502.30](https://2023.antflix.net#502.30)", + "displayTitle": "502.30 Grounding and Bonding", + "children": [ + { + "body": "Wiring systems and equipment shall be grounded in accordance with Part I and Part VI of Article 250, as applicable. [502.30_(A)](https://2023.antflix.net#502.30_(A))", + "displayTitle": "(A) Grounding", + "children": [], + "url": "https://2023.antflix.net#502.30_(A)" + }, + { + "body": "Bonding shall comply with Part I and Part V of Article 250, as applicable, and 502.30(B)(1) and (B)(2). [502.30_(B)](https://2023.antflix.net#502.30_(B))", + "displayTitle": "(B) Bonding", + "children": [ + { + "body": "Bonding shall comply with 502.30(B)(1)(a) and (B)(1)(b). The locknut-bushing and double-locknut types of contacts shall not be depended on for bonding purposes, but bonding jumpers with identified fittings or other approved means of bonding shall be used. These bonding means shall apply to all metal raceways, fittings, boxes, cable trays, and enclosures, and other parts of raceway systems between hazardous (classified) locations and the point of grounding for service equipment or point of grounding for a separately derived system. Metal struts, angles, or channels provided for support and mechanical or physical protection as permitted in 335.4(5), 336.10(7)(c), or 722.135(C) shall be bonded in accordance with 250.102.Where the branch-circuit overcurrent protection is located on the load side of the disconnecting means, the specific bonding means shall be permitted to end at the nearest point where the grounded circuit conductor and the grounding electrode conductor are connected together on the line side of the building or structure disconnecting means as specified in 250.32(B). [502.30_(B)_(1)](https://2023.antflix.net#502.30_(B)_(1))", + "displayTitle": "(1) Specific Bonding Means", + "children": [], + "url": "https://2023.antflix.net#502.30_(B)_(1)" + }, + { + "body": "Liquidtight flexible metal conduit shall comply with 502.30(B)(2)(a) and (B)(2)(b). Liquidtight flexible metal conduit shall include an equipment bonding jumper of the wire type in accordance with 250.102.In Class II, Division 2 locations, the bonding jumper shall not be required where all of the following conditions are met:Listed liquidtight flexible metal conduit 1.8 m (6 ft) or less in length, with fittings listed for grounding, is used.Overcurrent protection in the circuit is limited to 10 amperes or less.The load is part of a meter, instrument, or relay circuit. [502.30_(B)_(2)](https://2023.antflix.net#502.30_(B)_(2))", + "displayTitle": "(2) Liquidtight Flexible Metal Conduit", + "children": [], + "url": "https://2023.antflix.net#502.30_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#502.30_(B)" + } + ], + "url": "https://2023.antflix.net#502.30" + }, + { + "body": "Surge arresters and surge-protective devices installed in a Class II, Division 1 location shall be in suitable enclosures. Surge-protective capacitors shall be of a type designed for specific duty. [502.35](https://2023.antflix.net#502.35)", + "displayTitle": "502.35 Surge Protection - Class II, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#502.35" + }, + { + "displayTitle": "Part III Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_65_III" + }, + { + "displayTitle": "502.100 Transformers and Capacitors", + "children": [ + { + "body": "In Class II, Division 1 locations, transformers and capacitors shall comply with 502.100(A)(1) through (A)(3). [502.100_(A)](https://2023.antflix.net#502.100_(A))", + "displayTitle": "(A) Class II, Division 1", + "children": [ + { + "body": "Transformers and capacitors containing a liquid that will burn shall be installed only in vaults complying with 450.41 through 450.48, and, in addition, (1), (2), and (3) shall apply. Doors or other openings communicating with the Division 1 location shall have self-closing fire doors on both sides of the wall, and the doors shall be carefully fitted and provided with suitable seals (such as weather stripping) to minimize the entrance of dust into the vault.Vent openings and ducts shall communicate only with the outside air.Suitable pressure-relief openings communicating with the outside air shall be provided. [502.100_(A)_(1)](https://2023.antflix.net#502.100_(A)_(1))", + "displayTitle": "(1) Containing Liquid That Will Burn", + "children": [], + "url": "https://2023.antflix.net#502.100_(A)_(1)" + }, + { + "body": "Transformers and capacitors that do not contain a liquid that will burn shall be installed in vaults complying with 450.41 through 450.48 or be identified as a complete assembly, including terminal connections. [502.100_(A)_(2)](https://2023.antflix.net#502.100_(A)_(2))", + "displayTitle": "(2) Not Containing Liquid That Will Burn", + "children": [], + "url": "https://2023.antflix.net#502.100_(A)_(2)" + }, + { + "body": "No transformer or capacitor shall be installed in a Class II, Division 1, Group E location. [502.100_(A)_(3)](https://2023.antflix.net#502.100_(A)_(3))", + "displayTitle": "(3) Group E", + "children": [], + "url": "https://2023.antflix.net#502.100_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#502.100_(A)" + }, + { + "body": "In Class II, Division 2 locations, transformers and capacitors shall comply with 502.100(B)(1) through (B)(3). [502.100_(B)](https://2023.antflix.net#502.100_(B))", + "displayTitle": "(B) Class II, Division 2", + "children": [ + { + "body": "Transformers and capacitors containing a liquid that will burn shall be installed in vaults that comply with 450.41 through 450.48. [502.100_(B)_(1)](https://2023.antflix.net#502.100_(B)_(1))", + "displayTitle": "(1) Containing Liquid That Will Burn", + "children": [], + "url": "https://2023.antflix.net#502.100_(B)_(1)" + }, + { + "body": "Transformers containing askarel and rated in excess of 25 kVA shall be as follows: Provided with pressure-relief ventsProvided with a means for absorbing any gases generated by arcing inside the case, or the pressure-relief vents shall be connected to a chimney or flue that will carry such gases outside the buildingHave an airspace of not less than 150 mm (6 in.) between the transformer cases and any adjacent combustible material [502.100_(B)_(2)](https://2023.antflix.net#502.100_(B)_(2))", + "displayTitle": "(2) Containing Askarel", + "children": [], + "url": "https://2023.antflix.net#502.100_(B)_(2)" + }, + { + "body": "Dry-type transformers shall be installed in vaults or shall have their windings and terminal connections enclosed in tight metal housings without ventilating or other openings and shall operate at not over 600 volts, nominal. [502.100_(B)_(3)](https://2023.antflix.net#502.100_(B)_(3))", + "displayTitle": "(3) Dry-Type Transformers", + "children": [], + "url": "https://2023.antflix.net#502.100_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#502.100_(B)" + } + ], + "url": "https://2023.antflix.net#502.100" + }, + { + "displayTitle": "502.115 Switches, Circuit Breakers, Motor Controllers, and Fuses", + "children": [ + { + "body": "In Class II, Division 1 locations, switches, circuit breakers, motor controllers, fuses, pushbuttons, relays, and similar devices shall be provided with enclosures identified for the location. [502.115_(A)](https://2023.antflix.net#502.115_(A))", + "displayTitle": "(A) Class II, Division 1", + "children": [], + "url": "https://2023.antflix.net#502.115_(A)" + }, + { + "body": "In Class IL Division 2 locations, enclosures for fuses, switches, circuit breakers, and motor controllers, including push buttons, relays, and similar devices, shall be dusttight or otherwise identified for the location. [502.115_(B)](https://2023.antflix.net#502.115_(B))", + "displayTitle": "(B) Class II, Division 2", + "children": [], + "url": "https://2023.antflix.net#502.115_(B)" + } + ], + "url": "https://2023.antflix.net#502.115" + }, + { + "displayTitle": "502.120 Control Transformers and Resistors", + "children": [ + { + "body": "In Class II Division 1 locations, control transformers, solenoids, impedance coils, resistors, and any overcurrent devices or switching mechanisms associated with them shall be provided with enclosures identified for the location. [502.120_(A)](https://2023.antflix.net#502.120_(A))", + "displayTitle": "(A) Class II, Division 1", + "children": [], + "url": "https://2023.antflix.net#502.120_(A)" + }, + { + "body": "In Class II, Division 2 locations, transformers and resistors shall comply with 502.120(B)(1) through (B)(3). [502.120_(B)](https://2023.antflix.net#502.120_(B))", + "displayTitle": "(B) Class II, Division 2", + "children": [ + { + "body": "Switching mechanisms (including overcurrent devices) associated with control transformers, solenoids, impedance coils, and resistors shall be provided with enclosures that are dusttight or otherwise identified for the location. [502.120_(B)_(1)](https://2023.antflix.net#502.120_(B)_(1))", + "displayTitle": "(1) Switching Mechanisms", + "children": [], + "url": "https://2023.antflix.net#502.120_(B)_(1)" + }, + { + "body": "Where not located in the same enclosure with switching mechanisms, control transformers, solenoids, and impedance coils shall be provided with enclosures that are dusttight or otherwise identified for the location. [502.120_(B)_(2)](https://2023.antflix.net#502.120_(B)_(2))", + "displayTitle": "(2) Coils and Windings", + "children": [], + "url": "https://2023.antflix.net#502.120_(B)_(2)" + }, + { + "body": "Resistors and resistance devices shall have dust-ignitionproof enclosures that are dusttight or otherwise identified for the location. [502.120_(B)_(3)](https://2023.antflix.net#502.120_(B)_(3))", + "displayTitle": "(3) Resistors", + "children": [], + "url": "https://2023.antflix.net#502.120_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#502.120_(B)" + } + ], + "url": "https://2023.antflix.net#502.120" + }, + { + "displayTitle": "502.125 Motors and Generators", + "children": [ + { + "body": "In Class II, Division 1 locations, motors, generators, and other rotating electrical machinery shall be in conformance with either of the following: Identified for the locationTotally enclosed pipe-ventilated [502.125_(A)](https://2023.antflix.net#502.125_(A))", + "displayTitle": "(A) Class II, Division 1", + "children": [], + "url": "https://2023.antflix.net#502.125_(A)" + }, + { + "body": "In Class II, Division 2 locations, motors, generators, and other rotating electrical equipment shall be totally enclosed nonventilated, totally enclosed pipe-ventilated, totally enclosed water-air-cooled, totally enclosed fan-cooled, or dust-ignitionproof, for which maximum full-load external temperature shall be in accordance with 500.8(D)(2) for normal operation when operating in free air (not dust blanketed) and shall have no external openings. Exception: If the authority having jurisdiction believes accumulations of nonconductive, nonabrasive dust will be moderate and if machines can be easily reached for routine cleaning and maintenance, the following shall be permitted to be installed: (1) Standard open-type machines without sliding contacts, centrifugal or other types of switching mechanism (including motor over-current, overloading, and overtemperature devices), or integral resistance devices (2) Standard open-type machines with such contacts, switching mechanisms, or resistance devices enclosed within dusttight housings without ventilating or other openings (3) Self-cleaning textile motors of the squirrel-cage type (4) Machines with sealed bearings, bearing isolators, and seals [502.125_(B)](https://2023.antflix.net#502.125_(B))", + "displayTitle": "(B) Class II, Division 2", + "children": [], + "url": "https://2023.antflix.net#502.125_(B)" + } + ], + "url": "https://2023.antflix.net#502.125" + }, + { + "body": "Ventilating pipes for motors, generators, or other rotating electrical machinery, or for enclosures for electrical equipment, shall be of metal not less than 0.53 mm (0.021 in.) in thickness or of equally substantial noncombustible material and shall comply with all of the following: Lead directly to a source of clean air outside of buildingsBe screened at the outer ends to prevent the entrance of small animals or birdsBe protected against physical damage and against rusting or other corrosive influencesVentilating pipes shall also comply with 502.128(A) and (B). [502.128](https://2023.antflix.net#502.128)", + "displayTitle": "502.128 Ventilating Piping", + "children": [ + { + "body": "In Class II, Division 1 locations, ventilating pipes, including their connections to motors or to the dust-ignitionproof enclosures for other equipment, shall be dusttight throughout their length. For metal pipes, seams and joints shall comply with one of the following: Be riveted and solderedBe bolted and solderedBe weldedBe rendered dusttight by some other equally effective means [502.128_(A)](https://2023.antflix.net#502.128_(A))", + "displayTitle": "(A) Class II, Division 1", + "children": [], + "url": "https://2023.antflix.net#502.128_(A)" + }, + { + "body": "In Class II, Division 2 locations, ventilating pipes and their connections shall be sufficiently tight to prevent the entrance of appreciable quantities of dust into the ventilated equipment or enclosure and to prevent the escape of sparks, flame, or burning material that might ignite dust accumulations or combustible material in the vicinity. For metal pipes, lock seams and riveted or welded joints shall be permitted; and tight-fitting slip joints shall be permitted where some flexibility is necessary, as at connections to motors. [502.128_(B)](https://2023.antflix.net#502.128_(B))", + "displayTitle": "(B) Class II, Division 2", + "children": [], + "url": "https://2023.antflix.net#502.128_(B)" + } + ], + "url": "https://2023.antflix.net#502.128" + }, + { + "displayTitle": "502.130 Luminaires", + "children": [ + { + "body": "In Class II, Division 1 locations, luminaires for fixed and portable lighting shall comply with 502.130(A)(1) through (A)(4). [502.130_(A)](https://2023.antflix.net#502.130_(A))", + "displayTitle": "(A) Class II, Division 1", + "children": [ + { + "body": "Each luminaire shall be identified for the location and shall be clearly marked to indicate the type and maximum wattage of the lamp for which it is designed. [502.130_(A)_(1)](https://2023.antflix.net#502.130_(A)_(1))", + "displayTitle": "(1) Marking", + "children": [], + "url": "https://2023.antflix.net#502.130_(A)_(1)" + }, + { + "body": "Each luminaire shall be protected against physical damage by a suitable guard or by location. [502.130_(A)_(2)](https://2023.antflix.net#502.130_(A)_(2))", + "displayTitle": "(2) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#502.130_(A)_(2)" + }, + { + "body": "Pendant luminaires shall be suspended by threaded rigid metal conduit stems, by threaded steel intermediate metal conduit stems, by chains with approved fittings, or by other approved means. For rigid stems longer than 300 mm (12 in.), permanent and effective bracing against lateral displacement shall be provided at a level not more than 300 mm (12 in.) above the lower end of the stem, or flexibility in the form of a fitting or a flexible connector listed for the location shall be provided not more than 300 mm (12 in.) from the point of attachment to the supporting box or fitting. Threaded joints shall be provided with set screws or other effective means to prevent loosening. Where wiring between an outlet box or fitting and a pendant luminaire is not enclosed in conduit, flexible cord listed for hard usage shall be permitted to be used in accordance with 502.10(A)(2)(5). Flexible cord shall not serve as the supporting means for a luminaire. [502.130_(A)_(3)](https://2023.antflix.net#502.130_(A)_(3))", + "displayTitle": "(3) Pendant Luminaires", + "children": [], + "url": "https://2023.antflix.net#502.130_(A)_(3)" + }, + { + "body": "Boxes, box assemblies, or fittings used for the support of luminaires shall be identified for Class II locations. [502.130_(A)_(4)](https://2023.antflix.net#502.130_(A)_(4))", + "displayTitle": "(4) Supports", + "children": [], + "url": "https://2023.antflix.net#502.130_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#502.130_(A)" + }, + { + "body": "In Class II, Division 2 locations, luminaires shall comply with 502.130(B)(1) through (B)(5). [502.130_(B)](https://2023.antflix.net#502.130_(B))", + "displayTitle": "(B) Class II, Division 2", + "children": [ + { + "body": "Portable lighting equipment shall be identified for the location. They shall be clearly marked to indicate the maximum wattage of lamps for which they are designed. [502.130_(B)_(1)](https://2023.antflix.net#502.130_(B)_(1))", + "displayTitle": "(1) Portable Lighting Equipment", + "children": [], + "url": "https://2023.antflix.net#502.130_(B)_(1)" + }, + { + "body": "Luminaires for fixed lighting shall be provided with enclosures that are dusttight or otherwise identified for the location. Each luminaire shall be clearly marked to indicate the maximum wattage of the lamp that shall be permitted without exceeding an exposed surface temperature in accordance with 500.8(D)(2) under normal conditions of use. [502.130_(B)_(2)](https://2023.antflix.net#502.130_(B)_(2))", + "displayTitle": "(2) Fixed Lighting", + "children": [], + "url": "https://2023.antflix.net#502.130_(B)_(2)" + }, + { + "body": "Luminaires for fixed lighting shall be protected from physical damage by suitable guards or by location. [502.130_(B)_(3)](https://2023.antflix.net#502.130_(B)_(3))", + "displayTitle": "(3) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#502.130_(B)_(3)" + }, + { + "body": "Pendant luminaires shall be suspended by threaded rigid metal conduit stems, by threaded steel intermediate metal conduit stems, by chains with approved fittings, or by other approved means. For rigid stems longer than 300 mm (12 in.), permanent and effective bracing against lateral displacement shall be provided at a level not more than 300 mm (12 in.) above the lower end of the stem, or flexibility in the form of an identified fitting or a flexible connector shall be provided not more than 300 mm (12 in.) from the point of attachment to the supporting box or fitting. Where wiring between an outlet box or fitting and a pendant luminaire is not enclosed in conduit, flexible cord listed for hard usage shall be permitted if terminated with a listed cord connector that maintains the protection technique. Flexible cord shall not serve as the supporting means for a luminaire. [502.130_(B)_(4)](https://2023.antflix.net#502.130_(B)_(4))", + "displayTitle": "(4) Pendant Luminaires", + "children": [], + "url": "https://2023.antflix.net#502.130_(B)_(4)" + }, + { + "body": "Starting and control equipment for electric-discharge lamps shall comply with the requirements of 502.120(B). [502.130_(B)_(5)](https://2023.antflix.net#502.130_(B)_(5))", + "displayTitle": "(5) Electric-Discharge Lamps", + "children": [], + "url": "https://2023.antflix.net#502.130_(B)_(5)" + } + ], + "url": "https://2023.antflix.net#502.130_(B)" + } + ], + "url": "https://2023.antflix.net#502.130" + }, + { + "displayTitle": "502.135 Utilization Equipment", + "children": [ + { + "body": "In Class II, Division 1 locations, all utilization equipment shall be identified for the location. [502.135_(A)](https://2023.antflix.net#502.135_(A))", + "displayTitle": "(A) Class II, Division 1", + "children": [], + "url": "https://2023.antflix.net#502.135_(A)" + }, + { + "body": "In Class II, Division 2 locations, all utilization equipment shall comply with 502.135(B)(1) through (B)(4). [502.135_(B)](https://2023.antflix.net#502.135_(B))", + "displayTitle": "(B) Class II, Division 2", + "children": [ + { + "body": "Electrically heated utilization equipment shall be identified for the location. Exception: Metal-enclosed radiant heating panel equipment shall be permitted to be dusttight and marked in accordance with 500.8(C). [502.135_(B)_(1)](https://2023.antflix.net#502.135_(B)_(1))", + "displayTitle": "(1) Heaters", + "children": [], + "url": "https://2023.antflix.net#502.135_(B)_(1)" + }, + { + "body": "Motors of motor-driven utilization equipment shall comply with 502.125(B). [502.135_(B)_(2)](https://2023.antflix.net#502.135_(B)_(2))", + "displayTitle": "(2) Motors", + "children": [], + "url": "https://2023.antflix.net#502.135_(B)_(2)" + }, + { + "body": "Enclosures for switches, circuit breakers, and fuses shall comply with 502.115(B). [502.135_(B)_(3)](https://2023.antflix.net#502.135_(B)_(3))", + "displayTitle": "(3) Switches, Circuit Breakers, and Fuses", + "children": [], + "url": "https://2023.antflix.net#502.135_(B)_(3)" + }, + { + "body": "Transformers, solenoids, impedance coils, and resistors shall comply with 502.120(B). [502.135_(B)_(4)](https://2023.antflix.net#502.135_(B)_(4))", + "displayTitle": "(4) Transformers, Solenoids, Impedance Coils, and Resistors", + "children": [], + "url": "https://2023.antflix.net#502.135_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#502.135_(B)" + } + ], + "url": "https://2023.antflix.net#502.135" + }, + { + "displayTitle": "502.140 Flexible Cords - Class II, Divisions 1 and 2", + "children": [ + { + "body": "Flexible cords used in Class II locations shall be permitted as follows: For connection between portable lighting equipment or other portable utilization equipment and the fixed portion of its supply circuit. The flexible cord shall be attached to the utilization equipment with a cord connector listed for the protection technique of the equipment wiring compartment. An attachment plug in accordance with 502.145 shall be employed.Where flexible cord is permitted by 502.10(A)(2) for fixed and mobile electrical utilization equipment; where the flexible cord is protected by location or by a suitable guard from damage; and only in a restricted industrial establishment.For electric submersible pumps with means for removal without entering the wet-pit. The extension of the flexible cord within a suitable raceway between the wet-pit and the power source shall be permitted.For electric mixers intended for travel into and out of open-type mixing tanks or vats.For temporary portable assemblies consisting of receptacles, switches, and other devices that are not considered portable utilization equipment but are individually listed for the location. [502.140_(A)](https://2023.antflix.net#502.140_(A))", + "displayTitle": "(A) Permitted Uses", + "children": [], + "url": "https://2023.antflix.net#502.140_(A)" + }, + { + "body": "Where flexible cords are used, the cords shall comply with all of the following: Be of a type listed for extra-hard usage.Exception to (1): Flexible cord listed for hard usage as permitted by 502.130(A)(3) and (B)(4).Contain, in addition to the conductors of the circuit, an equipment grounding conductor complying with 400.23.Be supported by clamps or by other suitable means in such a manner that there will be no tension on the terminal connections.In Division 1 locations, the cord shall be terminated with a cord connector listed for the location or a listed cord connector installed with a seal listed for the location. In Division 2 locations, the cord shall be terminated with a listed dusttight cord connector.Be of continuous length. Where 502.140(A)(5) is applied, cords shall be of continuous length from the power source to the temporary portable assembly and from the temporary portable assembly to the utilization equipment. [502.140_(B)](https://2023.antflix.net#502.140_(B))", + "displayTitle": "(B) Installation", + "children": [], + "url": "https://2023.antflix.net#502.140_(B)" + } + ], + "url": "https://2023.antflix.net#502.140" + }, + { + "body": "Receptacles and attachment plugs shall be identified for the location. [502.145](https://2023.antflix.net#502.145)", + "displayTitle": "502.145 Receptacles and Attachment Plugs", + "children": [ + { + "displayTitle": "(A) Class II, Division 1", + "children": [ + { + "body": "In Class II, Division 1 locations, receptacles shall be part of the premises wiring. [502.145_(A)_(1)](https://2023.antflix.net#502.145_(A)_(1))", + "displayTitle": "(1) Receptacles", + "children": [], + "url": "https://2023.antflix.net#502.145_(A)_(1)" + }, + { + "body": "Attachment plugs shall be of the type that provides for connection to the equipment grounding conductor of the flexible cord. [502.145_(A)_(2)](https://2023.antflix.net#502.145_(A)_(2))", + "displayTitle": "(2) Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#502.145_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#502.145_(A)" + }, + { + "displayTitle": "(B) Class II, Division 2", + "children": [ + { + "body": "In Class II, Division 2 locations, receptacles shall be part of the premises wiring. [502.145_(B)_(1)](https://2023.antflix.net#502.145_(B)_(1))", + "displayTitle": "(1) Receptacles", + "children": [], + "url": "https://2023.antflix.net#502.145_(B)_(1)" + }, + { + "body": "Attachment plugs shall be of the type that provides for connection to the equipment grounding conductor of the flexible cord. [502.145_(B)_(2)](https://2023.antflix.net#502.145_(B)_(2))", + "displayTitle": "(2) Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#502.145_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#502.145_(B)" + } + ], + "url": "https://2023.antflix.net#502.145" + }, + { + "displayTitle": "502.150 Signaling, Alarm, Remote-Control, and Communications Systems; And Meters, Instruments, and Relays", + "children": [ + { + "body": "In Class II, Division 1 locations, signaling, alarm, remote-control, and communications systems; and meters, instruments, and relays shall comply with 502.150(A)(1) through (A)(3). [502.150_(A)](https://2023.antflix.net#502.150_(A))", + "displayTitle": "(A) Class II, Division 1", + "children": [ + { + "body": "Enclosures containing contacts shall comply with the requirements of 502.150(A)(1)(a) or (A)(1)(b). Switches, circuit breakers, relays, contactors, fuses, and current-breaking contacts for bells, horns, howlers, sirens, and other devices in which sparks or arcs might be produced shall be provided with enclosures identified for the location.Where current-breaking contacts are immersed in oil or where the interruption of current occurs within a chamber sealed against the entrance of dust, enclosures shall be permitted to be of the general-purpose type. [502.150_(A)_(1)](https://2023.antflix.net#502.150_(A)_(1))", + "displayTitle": "(1) Contacts", + "children": [], + "url": "https://2023.antflix.net#502.150_(A)_(1)" + }, + { + "body": "Enclosures containing resistors shall comply with the requirements of 502.150(A)(2)(a) or (A)(2)(b). Resistors, transformers, choke coils, rectifiers, thermionic tubes, and other heat-generating equipment shall be provided with enclosures identified for the location.Where resistors or similar equipment are immersed in oil or enclosed in a chamber sealed against the entrance of dust, enclosures shall be permitted to be of the general-purpose type. [502.150_(A)_(2)](https://2023.antflix.net#502.150_(A)_(2))", + "displayTitle": "(2) Resistors and Similar Equipment", + "children": [], + "url": "https://2023.antflix.net#502.150_(A)_(2)" + }, + { + "body": "Motors, generators, and other rotating electrical machinery shall comply with 502.125(A). [502.150_(A)_(3)](https://2023.antflix.net#502.150_(A)_(3))", + "displayTitle": "(3) Rotating Machinery", + "children": [], + "url": "https://2023.antflix.net#502.150_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#502.150_(A)" + }, + { + "body": "In Class II, Division 2 locations, signaling, alarm, remote-control, and communications systems; and meters, instruments, and relays shall comply with 502.150(B)(1) through (B)(4). [502.150_(B)](https://2023.antflix.net#502.150_(B))", + "displayTitle": "(B) Class II, Division 2", + "children": [ + { + "body": "Enclosures for contacts shall comply with the requirements of 502.150(B)(1)(a) or (B)(1)(b). Contacts shall comply with the requirements of 502.150(A)(1) or be installed in enclosures that are dusttight or otherwise identified for the location.Enclosures in nonincendive circuits shall be permitted to be of the general-purpose type. [502.150_(B)_(1)](https://2023.antflix.net#502.150_(B)_(1))", + "displayTitle": "(1) Contacts", + "children": [], + "url": "https://2023.antflix.net#502.150_(B)_(1)" + }, + { + "body": "The windings and terminal connections of transformers, choke coils, and similar equipment shall comply with 502.120(B)(2). [502.150_(B)_(2)](https://2023.antflix.net#502.150_(B)_(2))", + "displayTitle": "(2) Transformers and Similar Equipment", + "children": [], + "url": "https://2023.antflix.net#502.150_(B)_(2)" + }, + { + "body": "Resistors, resistance devices, thermionic tubes, rectifiers, and similar equipment shall comply with 502.120(B)(3). [502.150_(B)_(3)](https://2023.antflix.net#502.150_(B)_(3))", + "displayTitle": "(3) Resistors and Similar Equipment", + "children": [], + "url": "https://2023.antflix.net#502.150_(B)_(3)" + }, + { + "body": "Motors, generators, and other rotating electrical machinery shall comply with 502.125(B). [502.150_(B)_(4)](https://2023.antflix.net#502.150_(B)_(4))", + "displayTitle": "(4) Rotating Machinery", + "children": [], + "url": "https://2023.antflix.net#502.150_(B)_(4)" + }, + { + "body": "To facilitate replacements, process control instruments shall be permitted to be connected through flexible cord, attachment plug, and receptacle if all of the following conditions apply; Attachment plug and receptacle are listed for use in Class II, Division 2 locations, and listed for use with flexible cords.Exception No. 1 to (1): A Class II, Division 2 listing shall not be required if the circuit involves only nonincendive field wiring.Exception No. 2 to (1): In restricted industrial establishments, the Class II, Division 2 listing shall not be required when the requirements of 502.150(B)(5)(2), (B)(5)(3), and (B)(5)(4) are satisfied and the receptacle carries a label warning against plugging or unplugging when energized.The flexible cord does not exceed 900 mm (3 ft), is of a type listed for extra-hard usage, or, if listed for hard usage, is protected by location.Only necessary receptacles are provided.Unless the attachment plug and receptacle are interlocked mechanically or electrically, or otherwise designed so that they cannot be separated when the contacts are energized, and the contacts cannot be energized when the plug and socket outlet are separated, a switch complying with 502.115(B) is provided so that the attachment plug or receptacle is not depended on to interrupt current.Exception to (4): The switch shall not be required if the circuit is nonincendive field wiring. [502.150_(B)_(5)](https://2023.antflix.net#502.150_(B)_(5))", + "displayTitle": "(5) Connections", + "children": [], + "url": "https://2023.antflix.net#502.150_(B)_(5)" + } + ], + "url": "https://2023.antflix.net#502.150_(B)" + } + ], + "url": "https://2023.antflix.net#502.150" + } + ], + "url": "https://2023.antflix.net#502" + }, + { + "displayTitle": "Article 503 Class III Locations", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_75_I" + }, + { + "body": "This article covers the requirements for electrical and electronic equipment and wiring for all voltages in Class III, Division 1 and Division 2 locations where fire or explosion hazards might exist due to nonmetal combustible fibers/flyings or ignitible fibers/flyings. [503.1](https://2023.antflix.net#503.1)", + "displayTitle": "503.1 Scope", + "children": [], + "url": "https://2023.antflix.net#503.1" + }, + { + "body": "Equipment installed in Class III locations shall be able to function at full rating without developing surface temperatures high enough to cause excessive dehydration or gradual carbonization of accumulated fibers/flyings. Informational Note No. 1: See NFPA 505, Fire Safety Standard for Powered Industrial Trucks Including Type Designations, Areas of Use, Conversions, Maintenance, and Operations, for information on electric trucks. Informational Note No. 2: Organic material that is carbonized or excessively dry is highly susceptible to spontaneous ignition. [503.5](https://2023.antflix.net#503.5)", + "displayTitle": "503.5 General", + "children": [], + "url": "https://2023.antflix.net#503.5" + }, + { + "body": "Equipment listed and marked in accordance with 506.9(C)(2) for Zone 20 locations and with a temperature marking in accordance with 500.8(D)(3) shall be permitted in Class III, Division 1 locations. Equipment listed and marked in accordance with 506.9(C)(2) for Zone 20, Zone 21, or Zone 22 locations and with a temperature marking in accordance with 500.8(D)(3) shall be permitted in Class III, Division 2 locations. [503.6](https://2023.antflix.net#503.6)", + "displayTitle": "503.6 Zone Equipment", + "children": [], + "url": "https://2023.antflix.net#503.6" + }, + { + "displayTitle": "Part II Wiring", + "children": [], + "url": "https://2023.antflix.net#divider_75_II" + }, + { + "body": "Wiring methods shall comply with 503.10(A) or (B). Informational Note: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations]. [503.10](https://2023.antflix.net#503.10)", + "displayTitle": "503.10 Wiring Methods", + "children": [ + { + "displayTitle": "(A) Class III, Division 1", + "children": [ + { + "body": "In Class III, Division 1 locations, the following wiring methods shall be permitted: Rigid metal conduit (RMC), PVC conduit, RTRC conduit, intermediate metal conduit (IMC), electrical metallic tubing (EMT), dusttight wireways, or Type MC or Type MI cable with listed termination fittings.Type PLTC cable or Type PLTC-ER cable used in Class 2 and Class 3 circuits, including installation in cable tray systems. The cable shall be terminated with listed fittings. Type PLTC-ER cable shall include an equipment grounding conductor in addition to a drain wire that might be present.Type ITC cable or Type ITC-ER cable as permitted in 335.4 and terminated with listed fittings. Type ITC-ER cable shall include an equipment grounding conductor in addition to a drain wire.Type MV, Type TC, or Type TC-ER cable, including installation in cable tray systems. Type TC-ER cable shall include an equipment grounding conductor in addition to a drain wire that might be present. The cable shall be terminated with listed fittings.Cablebus.In restricted industrial establishments, listed Type P cable with metal braid armor, with an overall jacket, that is terminated with fittings listed for the location, and installed in accordance with Part II of Article 337. If installed in ladder, ventilated trough, or ventilated channel cable trays, cables shall be installed in a single layer, with a space not less than the larger cable diameter between the two adjacent cables unless otherwise protected against dust buildup resulting in increased heat.Informational Note No. 1: See UL 1309A, Outline of Investigation for Cable for Use in Mobile Installations, for information on construction, testing, and marking of Type P cable.Informational Note No. 2: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cable fittings. [503.10_(A)_(1)](https://2023.antflix.net#503.10_(A)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#503.10_(A)_(1)" + }, + { + "body": "All boxes and fittings shall be dust-tight. [503.10_(A)_(2)](https://2023.antflix.net#503.10_(A)_(2))", + "displayTitle": "(2) Boxes and Fittings", + "children": [], + "url": "https://2023.antflix.net#503.10_(A)_(2)" + }, + { + "body": "Where flexible connections are necessary, one or more of the following shall be permitted: Dusttight flexible connectorsLiquidtight flexible metal conduit (LFMC) with listed fittingsLiquidtight flexible nonmetallic conduit (LFNC) with listed fittings and bonded in accordance with 503.30(B)Interlocked armor Type MC cable having an overall jacket of suitable polymeric material and installed with listed dusttight termination fittingsFlexible cord in accordance with 503.140For elevator use, an identified elevator cable of Type EO, Type ETP, or Type ETT, shown under the \"use\" column in Table 400.4 for \"hazardous (classified) locations\" and terminated with listed dusttight fittingsIn restricted industrial establishments, listed Type P cable with metal braid armor, with an overall jacket, that is terminated with fittings listed for the location and installed in accordance with Part II of Article 337Informational Note: See UL 1309A, Outline of Investigation for Cable for Use in Mobile Installations, for information on construction, testing, and marking of Type P cable. [503.10_(A)_(3)](https://2023.antflix.net#503.10_(A)_(3))", + "displayTitle": "(3) Flexible Connections", + "children": [], + "url": "https://2023.antflix.net#503.10_(A)_(3)" + }, + { + "body": "Nonincendive field wiring shall be permitted using any of the wiring methods permitted for unclassified locations. Nonincendive field wiring systems shall be installed in accordance with the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted in a nonincendive field wiring circuit if the simple apparatus does not interconnect the nonincendive field wiring circuit to any other circuit. Informational Note: See Article 100 for the definition of simple apparatus. Separate nonincendive field wiring circuits shall be installed in accordance with one of the following:In separate cablesIn multiconductor cables where the conductors of each circuit are within a grounded metal shieldIn multiconductor cables where the conductors of each circuit have insulation with a minimum thickness of 0.25 mm (0.01 in.) [503.10_(A)_(4)](https://2023.antflix.net#503.10_(A)_(4))", + "displayTitle": "(4) Nonincendive Field Wiring", + "children": [], + "url": "https://2023.antflix.net#503.10_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#503.10_(A)" + }, + { + "body": "Wiring methods in Class III. Division 2 locations shall be in accordance with the following: The wiring shall comply with 503.10(A).In sections, compartments, or areas that do not contain machinery and are used solely for storage, open wiring on insulators shall be permitted where installed in accordance with Part II of Article 398, including the condition required by 398.15(C) that protection be provided where conductors are not run in roof spaces and are well out of reach of sources of physical damage. [503.10_(B)](https://2023.antflix.net#503.10_(B))", + "displayTitle": "(B) Class III, Division 2", + "children": [], + "url": "https://2023.antflix.net#503.10_(B)" + } + ], + "url": "https://2023.antflix.net#503.10" + }, + { + "body": "There shall be no uninsulated exposed parts, such as electrical conductors, buses, terminals, or components, that operate at more than 30 volts (15 volts in wet locations). These parts shall additionally be protected by a protection technique according to 500.7(E), (F), or (G) that is suitable for the location. Exception: As provided in 503.155. [503.25](https://2023.antflix.net#503.25)", + "displayTitle": "503.25 Uninsulated Exposed Parts, Class III, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#503.25" + }, + { + "body": "Regardless of the voltage of the electrical system, wiring systems and equipment shall comply with 503.30(A) and (B). [503.30](https://2023.antflix.net#503.30)", + "displayTitle": "503.30 Grounding and Bonding", + "children": [ + { + "body": "Wiring systems and equipment shall be grounded in accordance with Part I and Part VI of Article 250, as applicable. [503.30_(A)](https://2023.antflix.net#503.30_(A))", + "displayTitle": "(A) Grounding", + "children": [], + "url": "https://2023.antflix.net#503.30_(A)" + }, + { + "body": "Bonding shall comply with Part I and Part V of Article 250, as applicable, and 503.30(B)(1) and (B)(2). [503.30_(B)](https://2023.antflix.net#503.30_(B))", + "displayTitle": "(B) Bonding", + "children": [ + { + "body": "Bonding shall comply with 503.30(B)(1)(a) and (B)(2)(b). The locknut-bushing and double-locknut types of contacts shall not be depended on for bonding purposes, but bonding jumpers with identified fittings or other approved means of bonding shall be used. These bonding means shall apply to all metal raceways, fittings, boxes, cable trays, and enclosures, and other parts of raceway systems between hazardous (classified) locations and the point of grounding for service equipment or point of grounding for a separately derived system. Metal struts, angles, or channels provided for support and mechanical or physical protection as permitted in 335.4(5), 336.10(7)(c), or 722.135(C) shall be bonded in accordance with 250.102.Where the branch-circuit overcurrent protection is located on the load side of the disconnecting means, the specific bonding means shall be permitted to end at the nearest point where the grounded circuit conductor and the grounding electrode conductor are connected together on the line side of the building or structure disconnecting means as specified in 250.32(B). [503.30_(B)_(1)](https://2023.antflix.net#503.30_(B)_(1))", + "displayTitle": "(1) Specific Bonding Means", + "children": [], + "url": "https://2023.antflix.net#503.30_(B)_(1)" + }, + { + "body": "Liquidtight flexible metal conduit shall comply with 503.30(B)(2)(a) and (B)(2)(b). Liquidtight flexible metal conduit shall include an equipment bonding jumper of the wire type in accordance with 250.102.In Class III locations, the bonding jumper shall not be required where all of the following conditions are met:Listed liquidtight flexible metal conduit 1.8 m (6 ft) or less in length, with fittings listed for grounding, is used.Overcurrent protection in the circuit is limited to 10 amperes or less.The load is part of a meter, instrument, or relay circuit. [503.30_(B)_(2)](https://2023.antflix.net#503.30_(B)_(2))", + "displayTitle": "(2) Liquidtight Flexible Metal Conduit", + "children": [], + "url": "https://2023.antflix.net#503.30_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#503.30_(B)" + } + ], + "url": "https://2023.antflix.net#503.30" + }, + { + "displayTitle": "Part III Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_66_III" + }, + { + "body": "Transformers and capacitors shall comply with 502.100(B). [503.100](https://2023.antflix.net#503.100)", + "displayTitle": "503.100 Transformers and Capacitors - Class III, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#503.100" + }, + { + "body": "Switches, circuit breakers, motor controllers, and fuses, including pushbuttons, relays, and similar devices, shall be provided with dusttight enclosures. [503.115](https://2023.antflix.net#503.115)", + "displayTitle": "503.115 Switches, Circuit Breakers, Motor Controllers, and Fuses - Class III, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#503.115" + }, + { + "body": "Transformers, impedance coils, and resistors used as, or in conjunction with, control equipment for motors, generators, and appliances shall be provided with dusttight enclosures complying with the temperature limitations in 503.5. [503.120](https://2023.antflix.net#503.120)", + "displayTitle": "503.120 Control Transformers and Resistors - Class III, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#503.120" + }, + { + "body": "In Class III, Division 1 and Division 2 locations, motors, generators, and other rotating machinery shall be totally enclosed nonventilated, totally enclosed pipe ventilated, or totally enclosed fan cooled. Exception: In locations where, in the judgment of the authority having jurisdiction, only moderate accumulations of ignitible fibers/flyings are likely to collect on, in, or in the vicinity of a rotating electrical machine and where such machine is readily accessible for routine cleaning and maintenance, one of the following shall be permitted: (1) Self-cleaning textile motors of the squirrel-cage type (2) Standard open-type machines without sliding contacts or centrifugal or other types of switching mechanisms, including motor overload devices (3) Standard open-type machines having such contacts, switching mechanisms, or resistance devices enclosed within tight housings without ventilating or other openings [503.125](https://2023.antflix.net#503.125)", + "displayTitle": "503.125 Motors and Generators - Class III, Division 1 and Division 2", + "children": [], + "url": "https://2023.antflix.net#503.125" + }, + { + "body": "Ventilating pipes for motors, generators, or other rotating electrical machinery, or for enclosures for electric equipment, shall be of metal not less than 0.53 mm (0.021 in.) in thickness, or of equally substantial noncombustible material, and shall comply with the following:Lead directly to a source of clean air outside of buildingsBe screened at the outer ends to prevent the entrance of small animals or birdsBe protected against physical damage and against rusting or other corrosive influencesVentilating pipes shall be sufficiently tight, including their connections, to prevent the entrance of appreciable quantities of fibers/flyings into the ventilated equipment or enclosure and to prevent the escape of sparks, flame, or burning material that might ignite accumulations of fibers/flyings or combustible material in the vicinity. For metal pipes, lock seams and riveted or welded joints shall be permitted; and tight-fitting slip joints shall be permitted where some flexibility is necessary, as at connections to motors. [503.128](https://2023.antflix.net#503.128)", + "displayTitle": "503.128 Ventilating Piping - Class III, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#503.128" + }, + { + "displayTitle": "503.130 Luminaires - Class III, Divisions 1 and 2", + "children": [ + { + "body": "Luminaires for fixed lighting shall provide enclosures for lamps and lampholders that are designed to minimize entrance of fibers/flyings and to prevent the escape of sparks, burning material, or hot metal. Each luminaire shall be clearly marked to show the maximum wattage of the lamps that shall be permitted without exceeding an exposed surface temperature of 165\u00b0C (329\u00b0F) under normal conditions of use. [503.130_(A)](https://2023.antflix.net#503.130_(A))", + "displayTitle": "(A) Fixed Lighting", + "children": [], + "url": "https://2023.antflix.net#503.130_(A)" + }, + { + "body": "A luminaire that may be exposed to physical damage shall be protected by a suitable guard. [503.130_(B)](https://2023.antflix.net#503.130_(B))", + "displayTitle": "(B) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#503.130_(B)" + }, + { + "body": "Pendant luminaires shall be suspended by stems of threaded rigid metal conduit, threaded intermediate metal conduit, threaded metal tubing of equivalent thickness, or by chains with approved fittings. For stems longer than 300 mm (12 in.), permanent and effective bracing against lateral displacement shall be provided at a level not more than 300 mm (12 in.) above the lower end of the stem, or flexibility in the form of an identified fitting or a flexible connector shall be provided not more than 300 mm (12 in.) from the point of attachment to the supporting box or fitting. [503.130_(C)](https://2023.antflix.net#503.130_(C))", + "displayTitle": "(C) Pendant Luminaires", + "children": [], + "url": "https://2023.antflix.net#503.130_(C)" + }, + { + "body": "Portable lighting equipment shall be equipped with handles and protected with substantial guards. Lampholders shall be of the unswitched type with no provision for receiving attachment plugs. There shall be no exposed current-carrying metal parts, and all exposed non\u2014current-carrying metal parts shall be grounded. In all other respects, portable lighting equipment shall comply with 503.130(A). [503.130_(D)](https://2023.antflix.net#503.130_(D))", + "displayTitle": "(D) Portable Lighting Equipment", + "children": [], + "url": "https://2023.antflix.net#503.130_(D)" + } + ], + "url": "https://2023.antflix.net#503.130" + }, + { + "displayTitle": "503.135 Utilization Equipment - Class III, Divisions 1 and 2", + "children": [ + { + "body": "Electrically heated utilization equipment shall be identified for Class III locations. [503.135_(A)](https://2023.antflix.net#503.135_(A))", + "displayTitle": "(A) Heaters", + "children": [], + "url": "https://2023.antflix.net#503.135_(A)" + }, + { + "body": "Motors of motor-driven utilization equipment shall comply with 503.125. [503.135_(B)](https://2023.antflix.net#503.135_(B))", + "displayTitle": "(B) Motors", + "children": [], + "url": "https://2023.antflix.net#503.135_(B)" + }, + { + "body": "Switches, circuit breakers, motor controllers, and fuses shall comply with 503.115. [503.135_(C)](https://2023.antflix.net#503.135_(C))", + "displayTitle": "(C) Switches, Circuit Breakers, Motor Controllers, and Fuses", + "children": [], + "url": "https://2023.antflix.net#503.135_(C)" + } + ], + "url": "https://2023.antflix.net#503.135" + }, + { + "body": "Flexible cords shall comply with the following: Be of a type listed for extra-hard usageContain, in addition to the conductors of the circuit, an equipment grounding conductor complying with 400.23Be supported by clamps or other suitable means in such a manner that there will be no tension on the terminal connectionsBe terminated with a listed dusttight cord connector [503.140](https://2023.antflix.net#503.140)", + "displayTitle": "503.140 Flexible Cords - Class III, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#503.140" + }, + { + "body": "Receptacles and attachment plugs shall be of the grounding type, shall be designed to minimize the accumulation or the entry of fibers/flyings, and shall prevent the escape of sparks or molten particles. Exception: In locations where, in the judgment of the authority having jurisdiction, only moderate accumulations of ignitible fibers/flyings are likely to collect in the vicinity of a receptacle, and where such receptacle is readily accessible for routine cleaning and mounted to minimize the entry of fibers/flyings, general-purpose grounding-type receptacles shall be permitted. [503.145](https://2023.antflix.net#503.145)", + "displayTitle": "503.145 Receptacles and Attachment Plugs - Class III, Division 1 and Division 2", + "children": [], + "url": "https://2023.antflix.net#503.145" + }, + { + "body": "Signaling, alarm, remote-control, and local loudspeaker intercommunications systems shall comply with the requirements of this article regarding wiring methods, switches, transformers, resistors, motors, luminaires, and related components. [503.150](https://2023.antflix.net#503.150)", + "displayTitle": "503.150 Signaling, Alarm, Remote-Control, and Local Loudspeaker Intercommunications Systems - Class III, Division 1 and Division 2", + "children": [], + "url": "https://2023.antflix.net#503.150" + }, + { + "body": "Where installed for operation over combustible fibers or accumulations of flyings, traveling cranes and hoists for material handling, traveling cleaners for textile machinery, and similar equipment shall comply with 503.155(A) through (D). [503.155](https://2023.antflix.net#503.155)", + "displayTitle": "503.155 Electric Cranes, Hoists, and Similar Equipment - Class III, Divisions 1 and 2", + "children": [ + { + "body": "The power supply to contact conductors shall be electrically isolated from all other systems, ungrounded, and shall be equipped with an acceptable ground detector that gives an alarm and automatically de-energizes the contact conductors in case of a fault to ground or gives a visual and audible alarm as long as power is supplied to the contact conductors and the ground fault remains. [503.155_(A)](https://2023.antflix.net#503.155_(A))", + "displayTitle": "(A) Power Supply", + "children": [], + "url": "https://2023.antflix.net#503.155_(A)" + }, + { + "body": "Contact conductors shall be located or guarded so as to be inaccessible to other than authorized persons and shall be protected against accidental contact with foreign objects. [503.155_(B)](https://2023.antflix.net#503.155_(B))", + "displayTitle": "(B) Contact Conductors", + "children": [], + "url": "https://2023.antflix.net#503.155_(B)" + }, + { + "body": "Current collectors shall be arranged or guarded so as to confine normal sparking and prevent escape of sparks or hot particles. To reduce sparking, two or more separate surfaces of contact shall be provided for each contact conductor. Reliable means shall be provided to keep contact conductors and current collectors free of accumulations of lint or flyings. [503.155_(C)](https://2023.antflix.net#503.155_(C))", + "displayTitle": "(C) Current Collectors", + "children": [], + "url": "https://2023.antflix.net#503.155_(C)" + }, + { + "body": "Control equipment shall comply with 503.115 and 503.120. [503.155_(D)](https://2023.antflix.net#503.155_(D))", + "displayTitle": "(D) Control Equipment", + "children": [], + "url": "https://2023.antflix.net#503.155_(D)" + } + ], + "url": "https://2023.antflix.net#503.155" + }, + { + "body": "Storage battery charging equipment shall be located in separate rooms built or lined with substantial noncombustible materials. The rooms shall be constructed to prevent the entrance of ignitible amounts of flyings or lint and shall be well ventilated. [503.160](https://2023.antflix.net#503.160)", + "displayTitle": "503.160 Storage Battery Charging Equipment - Class III, Divisions 1 and 2", + "children": [], + "url": "https://2023.antflix.net#503.160" + } + ], + "url": "https://2023.antflix.net#503" + }, + { + "displayTitle": "Article 504 Intrinsically Safe Systems", + "children": [ + { + "body": "This article covers the installation of intrinsically safe (I.S.) apparatus, wiring, and systems for hazardous (classified) locations. Informational Note: See ANSI/ISA RP 12.06.01, Recommended Practice for Wiring Methods for Hazardous (Classified) locations Instrumentation - Part 1: Intrinsic Safely, for additional information. [504.1](https://2023.antflix.net#504.1)", + "displayTitle": "504.1 Scope", + "children": [], + "url": "https://2023.antflix.net#504.1" + }, + { + "body": "Except as modified by this article, all applicable articles of this Code shall apply. [504.3](https://2023.antflix.net#504.3)", + "displayTitle": "504.3 Application of Other Articles", + "children": [], + "url": "https://2023.antflix.net#504.3" + }, + { + "body": "All intrinsically safe apparatus and associated apparatus shall be listed. Exception: Simple apparatus, as described on the control drawing, shall not be required to be listed. [504.4](https://2023.antflix.net#504.4)", + "displayTitle": "504.4 Equipment", + "children": [], + "url": "https://2023.antflix.net#504.4" + }, + { + "displayTitle": "504.10 Equipment Installation", + "children": [ + { + "body": "Intrinsically safe apparatus, associated apparatus, and other equipment shall be installed in accordance with the control drawing(s). A simple apparatus, whether or not shown on the control drawing(s), shall be permitted to be installed provided the simple apparatus does not interconnect intrinsically safe circuits. Informational Note No. 1: The control drawing identification is marked on the apparatus. Informational Note No. 2: Associated apparatus with a marked Um of less than 250 V may require additional overvoltage protection at the inputs to limit any possible fault voltages to less than the Um marked on the product. [504.10_(A)](https://2023.antflix.net#504.10_(A))", + "displayTitle": "(A) Control Drawing", + "children": [], + "url": "https://2023.antflix.net#504.10_(A)" + }, + { + "body": "Intrinsically safe apparatus shall be permitted to be installed in any hazardous (classified) location for which it has been identified. Associated apparatus shall be permitted to be installed in any hazardous (classified) location for which it has been identified. Simple apparatus shall be permitted to be installed in any hazardous (classified) location in accordance with 504.10(D). [504.10_(B)](https://2023.antflix.net#504.10_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#504.10_(B)" + }, + { + "body": "General-purpose enclosures shall be permitted for intrinsically safe apparatus and associated apparatus unless otherwise specified in the manufacturer's documentation. [504.10_(C)](https://2023.antflix.net#504.10_(C))", + "displayTitle": "(C) Enclosures", + "children": [], + "url": "https://2023.antflix.net#504.10_(C)" + }, + { + "body": "Simple apparatus shall be permitted to be installed in any hazardous (classified) location in which the maximum surface temperature of the simple apparatus does not exceed the ignition temperature of the flammable gases or vapors, flammable liquids, combustible dusts, or ignitible fibers/flyings present. The maximum surface temperature can be determined from the values of the output power from the associated apparatus or apparatus to which it is connected to obtain the temperature class. The temperature class can be determined by: Reference to Table 504.10(D)Calculation using the following equation: [504.10(D)] T = PoRth + Tamb where: T = surface temperature Po = output power marked on the associated apparatus or intrinsically safe apparatus Rth = thermal resistance of the simple apparatus Tamb = ambient temperature (normally 40\u00b0C) and reference Table 500.8(C)(4) In addition, components with a surface area smaller than 10 cm2 (excluding lead wires) may be classified as T5 if their surface temperature does not exceed 150\u00b0C.Table 504.10(D) Assessment for T4 Classification According to Component Size and Temperature Total Surface Area Excluding Lead Wires Requirement for T4 Classification <20 mm2 Surface temperature \u2264275\u00b0C \u226520 mm2 \u226410 cm2 Surface temperature \u2264200\u00b0C \u226520 mm2 Power not exceeding 1.3 W* *Based on 40\u00b0C ambient temperature. Reduce to 1.2 W with an ambient of 60\u00b0C or 1.0 W with 80\u00b0C ambient temperature. [504.10_(D)](https://2023.antflix.net#504.10_(D))", + "displayTitle": "(D) Simple Apparatus", + "children": [], + "url": "https://2023.antflix.net#504.10_(D)" + } + ], + "url": "https://2023.antflix.net#504.10" + }, + { + "body": "Any of the wiring methods suitable for unclassified locations, including those covered by Chapter 7 and Chapter 8, shall be permitted for installing intrinsically safe apparatus. Sealing shall be as provided in 504.70, and separation shall be as provided in 504.30. [504.20](https://2023.antflix.net#504.20)", + "displayTitle": "504.20 Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#504.20" + }, + { + "displayTitle": "504.30 Separation of Intrinsically Safe Conductors", + "children": [ + { + "displayTitle": "(A) From Nonintrinsically Safe Circuit Conductors", + "children": [ + { + "body": "Conductors of intrinsically safe circuits shall not be placed in any raceway, cable tray, or cable with conductors of any nonintrinsically safe circuit, unless they meet the requirements of one of the following methods: Separated from conductors of nonintrinsically safe circuits in accordance with one of the following:By a distance of at least 50 mm (2 in.) and securedBy a grounded metal partition that is 0.91 mm (0.0359 in) or thickerAn approved insulating partitionAll of the intrinsically safe circuit conductors or nonintrinsically safe circuit conductors are in Type MC cable, Type MI cable, or other approved grounded metal-sheathed or metal-clad cables where the sheathing or cladding is capable of carrying fault current to groundIn a Division 2 or Zone 2 location, installed in a raceway, cable tray, or cable along with nonincendive field wiring circuits when installed in accordance with 504.30(B)Where passing through a Division 2 or Zone 2 location to supply apparatus that is located in a Division 1, Zone 0 or Zone 1 location, installed in a raceway, cable tray, or cable along with nonincendive field wiring circuits when installed in accordance with 504.30(B) [504.30_(A)_(1)](https://2023.antflix.net#504.30_(A)_(1))", + "displayTitle": "(1) In Raceways, Cable Trays, and Cables", + "children": [], + "url": "https://2023.antflix.net#504.30_(A)_(1)" + }, + { + "body": "Conductors of intrinsically safe circuits shall be secured so that any conductor that might come loose from a terminal is unlikely to come into contact with another terminal. The conductors shall be separated from conductors of nonintrinsically safe circuits by one of the following methods: Separation by at least 50 mm (2 in.) from conductors of any nonintrinsically safe circuits, and securedSeparation from conductors of nonintrinsically safe circuits by use of a grounded metal partition 0.91 mm (0.0359 in.) or thicker or approved restricted access wiring ducts separated from other wiring ducts by a minimum of 19 mm (3/4 in.)Separation from conductors of nonintrinsically safe circuits by use of rigid insulating partition 0.91 mm (0.0359 in,) or thicker that extends to within 1.5 mm (0.0625 in.) of the enclosure wallsUse of separate wiring compartments for intrinsically safe and nonintrinsically safe terminalsEither all intrinsically safe circuit conductors or all nonintrinsically safe circuit conductors are installed in grounded metal-sheathed or metal-clad cables, where the sheathing or cladding is capable of carrying fault current to ground [504.30_(A)_(2)](https://2023.antflix.net#504.30_(A)_(2))", + "displayTitle": "(2) Within Enclosures", + "children": [], + "url": "https://2023.antflix.net#504.30_(A)_(2)" + }, + { + "body": "Conductors and cables of intrinsically safe circuits run in other than raceway or cable tray systems shall be separated by at least 50 mm (2 in.) and secured from conductors and cables of any nonintrinsically safe circuits unless one of the following applies: All of the intrinsically safe circuit conductors are in Type MI or MC cables.All of the nonintrinsically safe circuit conductors are in raceways or Type MI or Type MC cables where the sheathing or cladding is capable of carrying fault current to ground. [504.30_(A)_(3)](https://2023.antflix.net#504.30_(A)_(3))", + "displayTitle": "(3) Other (Not in Raceway or Cable Tray Systems)", + "children": [], + "url": "https://2023.antflix.net#504.30_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#504.30_(A)" + }, + { + "body": "The clearance between two terminals for connection of field wiring of different intrinsically safe circuits shall be at least 6 mm (0.25 in.), unless this clearance is permitted to be reduced by the control drawing. Different intrinsically safe circuits shall be separated from each other by one of the following means: The conductors of each circuit are within a grounded metal shield.The conductors of each circuit have insulation with a minimum thickness of 0.25 mm (0.01 in.).Exception: Unless otherwise identified. [504.30_(B)](https://2023.antflix.net#504.30_(B))", + "displayTitle": "(B) From Different Intrinsically Safe Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#504.30_(B)" + }, + { + "body": "The clearance between the uninsulated parts of field wiring conductors connected to terminals and grounded metal or other conducting parts shall be at least 3 mm (0.125 in.). [504.30_(C)](https://2023.antflix.net#504.30_(C))", + "displayTitle": "(C) From Grounded Metal", + "children": [], + "url": "https://2023.antflix.net#504.30_(C)" + } + ], + "url": "https://2023.antflix.net#504.30" + }, + { + "displayTitle": "504.50 Grounding", + "children": [ + { + "body": "Intrinsically safe apparatus, enclosures, and raceways, if of metal, shall be connected to the equipment grounding conductor. Informational Note: See ANSI/ISA RP 12.06.01, Recommended Practice for Wiring Methods for Hazardous (Classified) Locations Instrumentation - Part 1: Intrinsic Safety. In addition to an equipment grounding conductor connection, a connection to a grounding electrode might be needed for some associated apparatus, such as zener diode barriers, if specified in the control drawing. [504.50_(A)](https://2023.antflix.net#504.50_(A))", + "displayTitle": "(A) Intrinsically Safe Apparatus, Enclosures, and Raceways", + "children": [], + "url": "https://2023.antflix.net#504.50_(A)" + }, + { + "body": "Associated apparatus and cable shields shall be grounded in accordance with the required control drawing. See 504.10(A). Informational Note: See ANSI/ISA RP 12.06.01, Recommended Practice for Wiring Methods for Hazardous (Classified) Locations Instrumentation - Part 1: Intrinsic Safety. In addition to an equipment grounding conductor connection, a connection to a grounding electrode might be needed for some associated apparatus, such as zener diode barriers, if specified in the control drawing. [504.50_(B)](https://2023.antflix.net#504.50_(B))", + "displayTitle": "(B) Associated Apparatus and Cable Shields", + "children": [], + "url": "https://2023.antflix.net#504.50_(B)" + }, + { + "body": "Where connection to a grounding electrode is required, the grounding electrode shall be as specified in 250.52(A)(1), (A)(2), (A)(3), and (A)(4) and shall comply with 250.30(A)(4). Sections 250.52(A)(5), (A)(7), and (A)(8) shall not be used if any of the electrodes specified in 250.52(A)(1), (A)(2), (A)(3), or (A)(4) are present. [504.50_(C)](https://2023.antflix.net#504.50_(C))", + "displayTitle": "(C) Connection to Grounding Electrodes", + "children": [], + "url": "https://2023.antflix.net#504.50_(C)" + } + ], + "url": "https://2023.antflix.net#504.50" + }, + { + "displayTitle": "504.60 Bonding", + "children": [ + { + "body": "Intrinsically safe apparatus, if of metal, shall be bonded in the hazardous (classified) location in accordance with 501.30(B), 502.30(B), 503.30(B), 505.30(B), or 506.30(B), as applicable. [504.60_(A)](https://2023.antflix.net#504.60_(A))", + "displayTitle": "(A) Intrinsically Safe Apparatus", + "children": [], + "url": "https://2023.antflix.net#504.60_(A)" + }, + { + "body": "Where metal raceways are used for intrinsically safe system wiring, bonding at all ends of the race-wav, regardless of the location, shall be in accordance with 501.30(B), 502.30(B), 503.30(B), 505.30(B), or 506.30(B), as applicable. [504.60_(B)](https://2023.antflix.net#504.60_(B))", + "displayTitle": "(B) Metal Raceways", + "children": [], + "url": "https://2023.antflix.net#504.60_(B)" + } + ], + "url": "https://2023.antflix.net#504.60" + }, + { + "body": "Conduits and cables that are required to be sealed by 501.15, 502.15, 505.16, and 506.16 shall be sealed to minimize the passage of gases, vapors, or dusts. Such seals shall not be required to be explosionproof or flameproof but shall be identified for the purpose of minimizing passage of gases, vapors, or dusts under normal operating conditions and shall be accessible. Exception: Seals shall not be required for enclosures that contain only intrinsically safe apparatus, except as required by 501.17. [504.70](https://2023.antflix.net#504.70)", + "displayTitle": "504.70 Sealing", + "children": [], + "url": "https://2023.antflix.net#504.70" + }, + { + "body": "Labels required by this section shall be suitable for the environment where they are installed, with consideration given to exposure to chemicals and sunlight. [504.80](https://2023.antflix.net#504.80)", + "displayTitle": "504.80 Identification", + "children": [ + { + "body": "Intrinsically safe circuits shall be identified at terminal and junction locations in a manner that is intended to prevent unintentional interference with the circuits during testing and servicing. [504.80_(A)](https://2023.antflix.net#504.80_(A))", + "displayTitle": "(A) Terminals", + "children": [], + "url": "https://2023.antflix.net#504.80_(A)" + }, + { + "body": "Raceways, cable trays, and other wiring methods for intrinsically safe system wiring shall be identified with permanently affixed labels with the wording \"Intrinsic Safety Wiring\" or equivalent. The labels shall be located so as to be visible after installation and placed so that they may be readily traced through the entire length of the installation. Intrinsic safety circuit labels shall appear in every section of the wiring system that is separated by enclosures, walls, partitions, or floors. Spacing between labels shall not be more than 7.5 m (25 ft). Exception: Circuits run underground shall be permitted to be identified where they become accessible after emergence from the ground. Informational Note No. 1: Wiring methods permitted in unclassified locations may be used for intrinsically safe systems in hazardous (classified) locations. Without labels to identify the application of the wiring, enforcement authorities cannot determine that an installation is in compliance with this Code. Informational Note No. 2: In unclassified locations, identification is necessary to ensure that nonintrinsically safe wire will not be inadvertently added to existing raceways at a later date. [504.80_(B)](https://2023.antflix.net#504.80_(B))", + "displayTitle": "(B) Wiring", + "children": [], + "url": "https://2023.antflix.net#504.80_(B)" + }, + { + "body": "Color coding shall be permitted to identify intrinsically safe conductors where they are colored light blue and where no other conductors colored light blue are used. Likewise, color coding shall be permitted to identify raceways, cable trays, and junction boxes where they are colored light blue and contain only intrinsically safe wiring. [504.80_(C)](https://2023.antflix.net#504.80_(C))", + "displayTitle": "(C) Color Coding", + "children": [], + "url": "https://2023.antflix.net#504.80_(C)" + } + ], + "url": "https://2023.antflix.net#504.80" + } + ], + "url": "https://2023.antflix.net#504" + }, + { + "displayTitle": "Article 505 Zone 0, 1, and 2 Locations", + "children": [ + { + "displayTitle": "505.1 Scope", + "children": [ + { + "body": "This article covers the requirements for the zone classification system as an alternative to the division classification system covered in 500.1 for electrical and electronic equipment and wiring for all voltages where fire or explosion hazards might exist due to flammable gases, vapors, or liquids for the following: Zone 0 hazardous (classified) locationsZone 1 hazardous (classified) locationsZone 2 hazardous (classified) locationsInformational Note No. 1: The term \"Class I\" was originally included as a prefix to Zone 0, Zone 1, and Zone 2 locations and references as an identifier for flammable gases, vapors, or liquids to differentiate from Class II and Class III locations. Zone 0, Zone 1, and Zone 2 only apply to flammable gases, vapors, or liquids, so the \"Class I\" prefix is redundant and has been deleted. However, the marking of \"Class I\" is left as an optional marking within this Article.Informational Note No. 2: See NFPA 497-2021, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, for extracted text that is followed by a reference in brackets. Only editorial changes were made to the extracted text to make it consistent with this Code.Informational Note No. 3: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations]. [505.1_(A)](https://2023.antflix.net#505.1_(A))", + "displayTitle": "(A) Covered", + "children": [], + "url": "https://2023.antflix.net#505.1_(A)" + }, + { + "body": "This article does not cover electrical and electronic equipment and wiring in the following: Class I, Class II, or Class III, Division 1 or Division 2 hazardous (classified) locationsZone 20, Zone 21, or Zone 22 hazardous (classified) locationsLocations subject to the unique risk and explosion hazards associated with explosives, pyrotechnics, and blasting agentsLocations where pyrophoric materials are the only materials used or handledFeatures of equipment that involve nonelectrical potential sources of ignition (e.g., couplings, pumps, gearboxes, brakes, hydraulic and pneumatic motors, fans, engines, compressors)Informational Note No. 1: Common nonelectrical potential sources of ignition include hot surfaces and mechanically generated sparks.Informational Note No. 2: See ANSI/UL 80079-36, Explosive Atmospheres - Part 36: Non-Electrical Equipment for Explosive Atmospheres - Basic Method and Requirements, and ANSI/UL, 80079-37, Explosive Atmospheres - Part 3 7: Non-Electrical Equipment for Explosive Atmospheres - Non-Electrical Type of Protection Constructional Safety \"c\" Control of Ignition Source \"b\", Liquid Immersion \"k\", for additional information. [505.1_(B)](https://2023.antflix.net#505.1_(B))", + "displayTitle": "(B) Not Covered", + "children": [], + "url": "https://2023.antflix.net#505.1_(B)" + } + ], + "url": "https://2023.antflix.net#505.1" + }, + { + "body": "Areas designated as hazardous (classified) locations or as unclassified shall be documented on an area classification drawing and other associated documentation. This documentation shall be made available to the AHJ and those authorized to design, install, inspect, maintain, or operate electrical equipment at the location. Informational Note No. 1: See ANSI/API RP 505, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2; ANSI/ISA 60079-10-1 (12.24.01), Explosive Atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres; and EI 15, Model Code of Safe Practice, Part 15: Area Classification for Installations Handling Flammable Fluids, for examples of area classification drawings. Informational Note No. 2: See 505.8(1)(2), (1)(3), or (1)(4) for information on where gas detection equipment is used as a means of protection. The documentation typically includes the type of detection equipment, its listing, the installation location(s), the alarm and shutdown criteria, and the calibration frequency. Informational Note No. 3: See NFPA 497, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas; ANSI/API RP 505, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2; ANSI/ISA 60079-10-1 (12.24.01), Explosive Atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres; and EI 15, Model Code of Safe Practice, Part 15: Area Classification for Installations Handling Flammable Fluids, for information on the classification of locations. Informational Note No. 4: See NFPA 77, Recommended Practice on Static Electricity, NFPA 780, Standard for the Installation of Lightning Protection Systems, and API RP 2003, Protection Against Ignitions Arising Out of Static, Lightning, and Stray Currents, for information on protection against static electricity and lightning hazards in hazardous (classified) locations. Informational Note No. 5: See NFPA 30, Flammable and Combustible Liquids Code, and ANSI/API RP 505, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2, for information on ventilation. Informational Note No. 6: See ANSI/API RP 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, for information on electrical systems for hazardous (classified) locations on offshore oil and gas producing platforms, drilling rigs, and workover rigs. Informational Note No. 7: See UL 120101, Definitions and Information Pertaining to Electrical Apparatus in Hazardous Locations, and ANSI/UL 60079-0, Explosive Atmospheres - Part 0: Equipment - General Requirements, for further information on the general application of electrical equipment in hazardous (classified) locations. Informational Note No. 8: See ANSI/UL 121203, Portable/Personal Electronic Products Suitable for Use in Class I, Division 2, Class I, Zone 2, Class II, Division 2, Class III, Division 1, Class III, Division 2, Zone 21 and Zone 22 Hazardous (Classified) Locations, for information on whether portable or transportable equipment having self-contained power supplies, such as battery-operated equipment, could potentially become an ignition source in hazardous (classified) locations. Informational Note No. 9: See ANSI/UL 60079-28, Explosive Atmospheres - Part 28: Protection of Equipment and Transmission Systems Using Optical Radiation, for information concerning the installation of equipment utilizing optical emissions technology (such as laser equipment) that could potentially become an ignition source in hazardous (classified) locations. Informational Note No. 10: See IEC/IEEE 60079-30-2, Explosive Atmospheres - Part 30-2: Electrical Resistance Trace Heating - Application Guide for Design, Installation and Maintenance, for information on electrical resistance trace heating for hazardous (classified) locations. Informational Note No. 11: See IEEE 844.2/CSA C293.2, IEEE/CSA Standard for Skin Effect Trace Heating of Pipelines, Vessels, Equipment, and Structures - , for information on electric skin effect trace heating for hazardous (classified) locations. Informational Note No. 12: See IEEE 844.4/CSA C293.4, IEEE/CSA Standard for Impedance Heating of Pipelines and Equipment - Application Guide for Design, Installation, Testing, Commissioning and Maintenance, for information on electric impedance heating for hazardous (classified) locations. [505.4](https://2023.antflix.net#505.4)", + "displayTitle": "505.4 Documentation", + "children": [], + "url": "https://2023.antflix.net#505.4" + }, + { + "displayTitle": "505.5 Classifications of Locations", + "children": [ + { + "displayTitle": "(A) General", + "children": [ + { + "body": "Locations shall be classified depending on the properties of the flammable gases, flammable liquid\u2014produced vapors, combustible liquid\u2014produced vapors, combustible dusts, or fibers/flyings that could be present and the likelihood that a flammable or combustible concentration or quantity is present. Each room, section, or area shall be considered individually in determining its classification. Informational Note No. 1: See 505.7 for restrictions on area classification. Informational Note No. 2: Through the exercise of ingenuity in the layout of electrical installations for hazardous (classified) locations, it is frequently possible to locate much of the equipment in a reduced level of classification or in an unclassified location to reduce the amount of special equipment required. [505.5_(A)_(1)](https://2023.antflix.net#505.5_(A)_(1))", + "displayTitle": "(1) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#505.5_(A)_(1)" + }, + { + "body": "Refrigerant machinery rooms that contain ammonia refrigeration systems and are equipped with adequate mechanical ventilation that operates continuously or is initiated by a detection system at a concentration not exceeding 150 ppm shall be permitted to be classified as \"unclassified\" locations. Informational Note: See ANSI/IIAR 2, Standard for Safe Design of Closed-Circuit Ammonia Refrigeration Systems, for information on the classification and ventilation of areas involving closed-circuit ammonia refrigeration systems. [505.5_(A)_(2)](https://2023.antflix.net#505.5_(A)_(2))", + "displayTitle": "(2) Refrigerant Machinery Rooms Using Ammonia", + "children": [], + "url": "https://2023.antflix.net#505.5_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#505.5_(A)" + }, + { + "body": "Zone 0, 1, and 2 locations are those in which flammable gases or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitible mixtures. Zone 0, 1, and 2 locations shall include those specified in 505.5(B)(1), (B)(2), and (B)(3). [505.5_(B)](https://2023.antflix.net#505.5_(B))", + "displayTitle": "(B) Zone 0, 1, and 2 Locations", + "children": [ + { + "body": "A Zone 0 location is a location in which one of the following conditions exists: Ignitible concentrations of flammable gases or vapors are present continuouslyIgnitible concentrations of flammable gases or vapors are present for long periods of timeInformational Note No. 1: See ANSI/API RP 505, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2, and ANSI/ISA 60079-10-1 (12.24.01), Explosive Atmospheres - Part 10-1: Classification of Areas - explosive gas atmospheres, for information for when flammable gases or vapors are present continuously or for long periods of time.Informational Note No. 2: This classification includes the following locations:Inside vented tanks or vessels that contain volatile flammable liquidsInside inadequately vented spraying or coating enclosures where volatile flammable solvents are usedBetween the inner and outer roof sections of a floating roof tank containing volatile flammable liquidsInside open vessels, tanks, and pits containing volatile flammable liquidsInterior of an exhaust duct used to vent ignitible concentrations of gases or vaporsInside inadequately ventilated enclosures that contain normally venting instruments using or analyzing flammable fluids and venting to the inside of the enclosures [505.5_(B)_(1)](https://2023.antflix.net#505.5_(B)_(1))", + "displayTitle": "(1) Zone 0", + "children": [], + "url": "https://2023.antflix.net#505.5_(B)_(1)" + }, + { + "body": "A Zone 1 location is a location In which ignitible concentrations of flammable gases or vapors are likely to exist under normal operating conditions; orIn which ignitible concentrations of flammable gases or vapors may exist frequently because of repair or maintenance operations or because of leakage; orIn which equipment is operated or processes are carried on, of such a nature that equipment breakdown or faulty operations could result in the release of ignitible concentrations of flammable gases or vapors and also cause simultaneous failure of electrical equipment in a mode to cause the electrical equipment to become a source of ignition; orThat is adjacent to a Zone 0 location from which ignitible concentrations of vapors could be communicated, unless communication is prevented by adequate positive pressure ventilation from a source of clean air and effective safeguards against ventilation failure are provided.Informational Note No. 1: Normal operation is considered the situation when plant equipment is operating within its design parameters. Minor releases of flammable material may be part of normal operations. Minor releases include the releases from mechanical packings on pumps. Failures that involve repair or shutdown (such as the breakdown of pump seals and flange gaskets, and spillage caused by accidents) are not considered normal operation.Informational Note No. 2: This classification usually includes the following locations:Where volatile flammable liquids or liquefied flammable gases are transferred from one container to anotherAreas in the vicinity of spraying and painting operations where flammable solvents are usedAdequately ventilated drying rooms or compartments for evaporation of flammable solventsAdequately ventilated locations containing fat and oil extraction equipment using volatile flammable solventsPortions of cleaning and dyeing plants where volatile flammable liquids are usedAdequately ventilated gas generator rooms and other portions of gas manufacturing plants where flammable gas might escapeInadequately ventilated pump rooms for flammable gas or for volatile flammable liquidsInteriors of refrigerators and freezers in which volatile flammable materials are stored in the open, lightly stoppered, or in easily ruptured containersOther locations where ignitible concentrations of flammable vapors or gases are likely to occur in the course of normal operation but are not classified Zone 0 [505.5_(B)_(2)](https://2023.antflix.net#505.5_(B)_(2))", + "displayTitle": "(2) Zone 1", + "children": [], + "url": "https://2023.antflix.net#505.5_(B)_(2)" + }, + { + "body": "A Zone 2 location is a location In which ignitible concentrations of flammable gases or vapors are not likely to occur in normal operation and, if they do occur, will exist only for a short period; orIn which volatile flammable liquids, flammable gases, or flammable vapors are handled, processed, or used but in which the liquids, gases, or vapors normally are confined within closed containers of closed systems from which they can escape, only as a result of accidental rupture or breakdown of the containers or system, or as a result of the abnormal operation of the equipment with which the liquids or gases are handled, processed, or used; orIn which ignitible concentrations of flammable gases or vapors normally are prevented by positive mechanical ventilation but which may become hazardous as a result of failure or abnormal operation of the ventilation equipment; orThat is adjacent to a Zone 1 location, from which ignitible concentrations of flammable gases or vapors could be communicated, unless such communication is prevented by adequate positive-pressure ventilation from a source of clean air and effective safeguards against ventilation failure are provided.Informational Note: The Zone 2 classification usually includes locations where volatile flammable liquids or flammable gases or vapors are used but which would become hazardous only in case of an accident or of some unusual operating condition. [505.5_(B)_(3)](https://2023.antflix.net#505.5_(B)_(3))", + "displayTitle": "(3) Zone 2", + "children": [], + "url": "https://2023.antflix.net#505.5_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#505.5_(B)" + } + ], + "url": "https://2023.antflix.net#505.5" + }, + { + "body": "For purposes of testing, approval, and area classification, various air mixtures (not oxygen enriched) shall be grouped as required in 505.6(A), (B), and (C). Informational Note No. 1: See 90.2(D). This Code does not apply to installations underground in mines. Group I is intended for use in describing atmospheres that contain firedamp: a mixture of gases, composed mostly of methane, found underground, usually in mines. Informational Note No. 2: See ANSI/UL 60079-11, Explosive Atmospheres - Part 11: Equipment Protection by Intrinsic Safety \"i\". The gas and vapor subdivision is based on the maximum experimental safe gap (MESG), minimum igniting current (MIC), or both. Informational Note No. 3: See ISO/IEC 80079-20-1, Explosive atmospheres - Part 20-1: Material characteristics for gas and vapour classification - Test methods and data, for information on the test equipment for determining MIC in the classification of gases or vapors according to their maximum experimental safe gaps and minimum igniting currents. Informational Note No. 4: Group II is currently subdivided into Group IIA, Group IIB, and Group IIC. Prior marking requirements permitted some types of protection to be marked without a subdivision, showing only Group II. Informational Note No. 5: It is necessary that the meanings of the different equipment markings and Group II classifications be carefully observed to avoid confusion with Class I, Division 1 and Division 2, Groups A, B, C, and D. Zone 0, 1, and 2, groups shall be as follows: [505.6](https://2023.antflix.net#505.6)", + "displayTitle": "505.6 Material Groups", + "children": [ + { + "body": "Atmospheres containing acetylene, hydrogen, or flammable gas, flammable liquid\u2014produced vapor, or combustible liquid\u2014produced vapor mixed with air that may burn or explode, having either a maximum experimental safe gap (MESG) value less than or equal to 0.50 mm or minimum igniting current (MIC) ratio less than or equal to 0.45. [497:3.3.5.2.3] Informational Note: See 500.6(A)(1) and (A)(2) for Class I, Group A and Class I, Group B classifications. Group IIC is equivalent to a combination of Class I, Group A and Class I, Group B. [505.6_(A)](https://2023.antflix.net#505.6_(A))", + "displayTitle": "(A) Group IIC", + "children": [], + "url": "https://2023.antflix.net#505.6_(A)" + }, + { + "body": "Atmospheres containing acetaldehyde, ethylene, or flammable gas, flammable liquid\u2014produced vapor, or combustible liquid\u2014produced vapor mixed with air that may burn or explode, having either maximum experimental safe gap (MESG) values greater than 0.50 mm and less than or equal to 0.90 mm or minimum igniting current ratio (MIC ratio) greater than 0.45 and less than or equal to 0.80. [497:3.3.5.2.2] Informational Note No. 1: See 500.6(A)(3). Class I, Group C is equivalent to Group IIB. Informational Note No. 2: Class I, Group B is equivalent to Group IIB + H2. [505.6_(B)](https://2023.antflix.net#505.6_(B))", + "displayTitle": "(B) Group IIB", + "children": [], + "url": "https://2023.antflix.net#505.6_(B)" + }, + { + "body": "Atmospheres containing acetone, ammonia, ethyl alcohol, gasoline, methane, propane, or flammable gas, flammable liquid\u2014produced vapor, or combustible liquid-produced vapor mixed with air that may burn or explode, having either a maximum experimental safe gap (MESG) value greater than 0.90 mm or minimum igniting current (MIC) ratio greater than 0.80. [497:3.3.5.2.1] Informational Note: See 500.6(A)(4). Class I, Group D is equivalent to Group IIA. [505.6_(C)](https://2023.antflix.net#505.6_(C))", + "displayTitle": "(C) Group IIA", + "children": [], + "url": "https://2023.antflix.net#505.6_(C)" + } + ], + "url": "https://2023.antflix.net#505.6" + }, + { + "body": "This article requires equipment construction and installation that ensures safe performance under conditions of proper use and maintenance. Informational Note No. 1: It is important that inspection authorities and users exercise more than ordinary care regarding the installation and maintenance of electrical equipment in hazardous (classified) locations. Informational Note No. 2: Electrical equipment that is dependent on the protection technique permitted by 505.8(A) might not be suitable for use at temperatures lower than -20\u00b0C (-4\u00b0F) unless they are identified for use at lower temperatures. Low ambient conditions require special consideration. At low ambient temperatures, flammable concentrations of vapors might not exist in a location classified at normal ambient temperature. [505.7](https://2023.antflix.net#505.7)", + "displayTitle": "505.7 Special Precaution", + "children": [ + { + "body": "Classification of areas, engineering and design, selection of equipment and wiring methods, installation, and inspection shall be performed by qualified persons. [505.7_(A)](https://2023.antflix.net#505.7_(A))", + "displayTitle": "(A) Implementation of Zone Classification System", + "children": [], + "url": "https://2023.antflix.net#505.7_(A)" + }, + { + "body": "In instances of areas within the same facility classified separately, Zone 2 locations shall be permitted to abut, but not overlap, Class I, Division 2 locations. Zone 0 or Zone 1 locations shall not abut Class I, Division 1 or Division 2 locations. [505.7_(B)](https://2023.antflix.net#505.7_(B))", + "displayTitle": "(B) Dual Classification", + "children": [], + "url": "https://2023.antflix.net#505.7_(B)" + }, + { + "body": "A Class I, Division 1 or Division 2 location shall be permitted to be reclassified as a Zone 0, Zone 1, or Zone 2 location, provided all of the space that is classified because of a single flammable gas or vapor source is reclassified under the requirements of this article. [505.7_(C)](https://2023.antflix.net#505.7_(C))", + "displayTitle": "(C) Reclassification Permitted", + "children": [], + "url": "https://2023.antflix.net#505.7_(C)" + }, + { + "body": "Flameproof equipment with flanged joints shall not be installed such that the flange openings are closer than the distances shown in Table 505.7(D) to any solid obstacle that is not a part of the equipment (such as steelworks, walls, weather guards, mounting brackets, pipes, or other electrical equipment) unless the equipment is listed for a smaller distance of separation. [505.7_(D)](https://2023.antflix.net#505.7_(D))", + "displayTitle": "(D) Solid Obstacles", + "children": [], + "url": "https://2023.antflix.net#505.7_(D)" + }, + { + "body": "Where flammable gases, combustible dusts, or fibers/flyings are or may be present at the same time, the simultaneous presence shall be considered during the selection and installation of the electrical equipment and the wiring methods, including the determination of the safe operating temperature of the electrical equipment. [505.7_(E)](https://2023.antflix.net#505.7_(E))", + "displayTitle": "(E) Simultaneous Presence of Flammable Gases and Combustible Dusts or Fibers/Flyings", + "children": [], + "url": "https://2023.antflix.net#505.7_(E)" + }, + { + "body": "Unless listed and marked for connection to circuits with higher available fault current, the available fault current for electrical equipment using type of protection \"e\" for the field wiring connections in Zone 1 locations shall be limited to 10,000 ruts symmetrical amperes to reduce the likelihood of ignition of a flammable atmosphere by an arc during a short-circuit event. Informational Note: Limitation of the available fault current to this level may require the application of current-limiting fuses or current-limiting circuit breakers. Table 505.7(D) Minimum Distance of Obstructions from Flameproof \"d\" Flange Openings Gas Group Minimum Distance mm in. IIC 40 137/64 IIB 30 13/16 IIA 10 25/64 [505.7_(F)](https://2023.antflix.net#505.7_(F))", + "displayTitle": "(F) Available Fault Current for Type of Protection \"e\"", + "children": [], + "url": "https://2023.antflix.net#505.7_(F)" + } + ], + "url": "https://2023.antflix.net#505.7" + }, + { + "body": "Acceptable protection techniques for electrical and electronic equipment in hazardous (classified) locations shall be as described in 505.8(A) through (Q). Informational Note No. 1: See ANSI/UL 120101, Definitions and Information Pertaining to Electrical Equipment in Hazardous Locations, and ANSI/UL 60079-0, Explosive Atmospheres - Part 0: Equipment - General Requirements, for additional information. Informational Note No. 2: See Chapter 9, Table 13 for descriptions of subdivisions of protection techniques. [505.8](https://2023.antflix.net#505.8)", + "displayTitle": "505.8 Protection Techniques", + "children": [ + { + "body": "This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations. [505.8_(A)](https://2023.antflix.net#505.8_(A))", + "displayTitle": "(A) Flameproof Enclosure \"d\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(A)" + }, + { + "body": "This protection technique shall be permitted for equipment in those Zone 1 or Zone 2 locations for which it is identified. [505.8_(B)](https://2023.antflix.net#505.8_(B))", + "displayTitle": "(B) Pressurized Enclosure \"p\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(B)" + }, + { + "body": "This protection technique shall be permitted for apparatus and associated apparatus for Zone 0, Zone 1, or Zone 2 locations for which it is listed. [505.8_(C)](https://2023.antflix.net#505.8_(C))", + "displayTitle": "(C) Intrinsic Safety \"i\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(C)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 2 locations. Type of protection \"n\" is further subdivided into nA, nC, and nR. [505.8_(D)](https://2023.antflix.net#505.8_(D))", + "displayTitle": "(D) Type of Protection \"n\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(D)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations. [505.8_(E)](https://2023.antflix.net#505.8_(E))", + "displayTitle": "(E) Liquid Immersion \"o\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(E)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations. [505.8_(F)](https://2023.antflix.net#505.8_(F))", + "displayTitle": "(F) Increased Safety \"e\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(F)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 0, Zone 1, or Zone 2 locations for which it is identified. [505.8_(G)](https://2023.antflix.net#505.8_(G))", + "displayTitle": "(G) Encapsulation \"m\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(G)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations. [505.8_(H)](https://2023.antflix.net#505.8_(H))", + "displayTitle": "(H) Powder Filling \"q\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(H)" + }, + { + "body": "A detection system for flammable gases shall be permitted as a means of protection in restricted industrial establishments. [505.8_(I)](https://2023.antflix.net#505.8_(I))", + "displayTitle": "(I) Detection Systems for Flammable Gases", + "children": [ + { + "body": "Any gas detection system used as a protection technique shall meet all of the requirements in 505.8(I)(1)(a) through (I)(1)(e). The gas detection equipment used shall be listed for Zone 1 and listed for the detection of the specific gas or vapor to be encountered.The gas detection system shall not use portable or transportable equipment, or temporary wiring methods.The gas detection system shall only use point-type sensors. The system shall be permitted to be augmented with open-path (line-of-sight)\u2014type sensors, but open-path\u2014type sensors shall not be the basis for this protection technique.The type of detection equipment, its listing, the installation location(s), the alarm and shutdown criteria, and the calibration frequency shall be documented where gas detectors are used as a protection technique.The applications for the use of gas detection systems as a protection technique shall be limited to 505.8(1)(2), (I)(3), or (I)(4).Informational Note No. 1: See ANSI/UL 121303, Guide for Use of Detectors for Flammable Gases, or ANSI/FM 121303, Guide for Use of Detectors for Flammable Gases, for additional information.Informational Note No. 2: See ANSI/UL 60079-29-1, Explosive Atmospheres - Part 29-1: Gas Detectors - Performance Requirements of Detectors for Flammable Gases, or ANSI/FM 60079-29-1, Explosive Atmospheres - Part 29-1: Gas Detectors - Performance Requirements of Detectors for Flammable Gases, for additional information.Informational Note No. 3: See ANSI/API RP 505, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2, for additional information.Informational Note No. 4: See ANSI/UL 60079-29-2, Explosive Atmospheres - Part 29-2: Gas Detectors - Selection, Installation, Use and Maintenance of Detectors for Flammable Gases and Oxygen, or ANSI/FM 60079-29-2, Explosive Atmospheres - Part 29-2: Gas Detectors - Selection, Installation, Use and Maintenance of Detectors for Flammable Gases and Oxygen, for additional information. [505.8_(I)_(1)](https://2023.antflix.net#505.8_(I)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#505.8_(I)_(1)" + }, + { + "body": "A location, enclosed space, or building that is classified as a Zone 1 location due to inadequate ventilation and that is provided with a detection system for flammable gases shall be permitted to use electrical equipment, installation methods, and wiring practices suitable for Zone 2 installations. Sensing a gas concentration of not more than 40 percent of the lower flammable limit or a gas detector system malfunction shall activate an alarm (audible or visual, or both, as most appropriate for the area). [505.8_(I)_(2)](https://2023.antflix.net#505.8_(I)_(2))", + "displayTitle": "(2) Inadequate Ventilation", + "children": [], + "url": "https://2023.antflix.net#505.8_(I)_(2)" + }, + { + "body": "Any building or enclosed space that does not contain a source of flammable gas or vapors that is located in, or with an opening into, a Zone 2 hazardous (classified) location that is provided with a detection system for flammable gases shall be permitted to use electrical equipment, installation methods, and wiring practices suitable for unclassified installations under all of the following conditions: An alarm (audible or visual, or both) shall be sounded at not more than 20 percent of the lower flammable limit.Sensing a gas concentration of not more than 40 percent of the lower flammable limit or a gas detector system malfunction shall activate an alarm (audible or visual, or both, as most appropriate for the area) and initiate automatic disconnection of power from all electrical devices in the area that are not suitable for Zone 2.The power disconnecting device(s) shall be suitable for Zone 1 if located inside the building or enclosed space. If the disconnecting device(s) is located outside the building or enclosed space, it shall be suitable for the location in which it is installed.Redundant or duplicate equipment (such as sensors) shall be permitted to be installed to avoid disconnecting electrical power when equipment malfunctions are indicated.When automatic shutdown could introduce additional or increased hazard, this technique shall not be permitted. [505.8_(I)_(3)](https://2023.antflix.net#505.8_(I)_(3))", + "displayTitle": "(3) Interior of a Building or Enclosed Space", + "children": [], + "url": "https://2023.antflix.net#505.8_(I)_(3)" + }, + { + "body": "Inside the interior of a control panel containing instrumentation or other equipment using or measuring flammable liquids, gases, or vapors and that is provided with a detection system for flammable gases equipment shall be allowed to use electrical equipment, installation methods, and wiring practices suitable for Zone 2 installations. An alarm (audible or visual, or both) shall be sounded at not more than 40 percent of the lower flammable limit. [505.8_(I)_(4)](https://2023.antflix.net#505.8_(I)_(4))", + "displayTitle": "(4) Interior of a Control Panel", + "children": [], + "url": "https://2023.antflix.net#505.8_(I)_(4)" + } + ], + "url": "https://2023.antflix.net#505.8_(I)" + }, + { + "body": "\"60079-30-1\". This protection technique shall be permitted for electrical resistance trace heating equipment in Zone 1 or Zone 2 for which it is listed. [505.8_(J)](https://2023.antflix.net#505.8_(J))", + "displayTitle": "(J) Protection by Electrical Resistance Trace Heating", + "children": [], + "url": "https://2023.antflix.net#505.8_(J)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 0, Zone 1, or Zone 2 locations for which the equipment is identified. [505.8_(K)](https://2023.antflix.net#505.8_(K))", + "displayTitle": "(K) Inherently Safe Optical Radiation \"op is\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(K)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations for which the equipment is identified. [505.8_(L)](https://2023.antflix.net#505.8_(L))", + "displayTitle": "(L) Protected Optical Radiation \"op pr\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(L)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 0, Zone 1, or Zone 2 locations for which the equipment is identified. [505.8_(M)](https://2023.antflix.net#505.8_(M))", + "displayTitle": "(M) Optical System With Interlock \"op sh\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(M)" + }, + { + "body": "This protection technique shall be permitted for skin effect trace heating equipment in Zone 1 or Zone 2 locations for which it is listed. [505.8_(N)](https://2023.antflix.net#505.8_(N))", + "displayTitle": "(N) Protection by Skin Effect Trace Heating \"IEEE 844.1\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(N)" + }, + { + "body": "This protection technique shall be permitted for impedance heating of pipelines, and equipment in Zone 2 locations for which it is listed. [505.8_(O)](https://2023.antflix.net#505.8_(O))", + "displayTitle": "(O) Protection by Impedance Heating \"IEEE 844.3\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(O)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations for which it is identified. [505.8_(P)](https://2023.antflix.net#505.8_(P))", + "displayTitle": "(P) Pressurized Room \"P\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(P)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 0, Zone 1, or Zone 2 locations for which it is listed. [505.8_(Q)](https://2023.antflix.net#505.8_(Q))", + "displayTitle": "(Q) Special Protection \"S\"", + "children": [], + "url": "https://2023.antflix.net#505.8_(Q)" + } + ], + "url": "https://2023.antflix.net#505.8" + }, + { + "displayTitle": "505.9 Equipment", + "children": [ + { + "body": "Suitability of identified equipment shall be determined by one of the following: Equipment listing or labelingEvidence of equipment evaluation from a qualified testing laboratory or inspection agency concerned with product evaluationEvidence acceptable to the authority having jurisdiction such as a manufacturer's self-evaluation or an owner's engineering judgmentInformational Note: Additional documentation for equipment may include certificates demonstrating compliance with applicable equipment standards, indicating special conditions of use, and other pertinent information. [505.9_(A)](https://2023.antflix.net#505.9_(A))", + "displayTitle": "(A) Suitability", + "children": [], + "url": "https://2023.antflix.net#505.9_(A)" + }, + { + "body": "Equipment that is listed for a Zone 0 location shall be permitted in a Zone 1 or Zone 2 location of the same gas or vapor, provided that it is installed in accordance with the requirements for the marked type of protection. Equipment that is listed for a Zone 1 location shall be permitted in a Zone 2 location of the same gas or vapor, provided that it is installed in accordance with the requirements for the marked type of protection.Equipment shall be permitted to be listed for a specific gas or vapor, specific mixtures of gases or vapors, or any specific combination of gases or vapors.Informational Note: One common example is equipment marked for \"IIB. + H2.\" [505.9_(B)](https://2023.antflix.net#505.9_(B))", + "displayTitle": "(B) Listing", + "children": [], + "url": "https://2023.antflix.net#505.9_(B)" + }, + { + "body": "Equipment shall be marked in accordance with 505.9(C)(1) or (C)(2). [505.9_(C)](https://2023.antflix.net#505.9_(C))", + "displayTitle": "(C) Marking", + "children": [ + { + "body": "Equipment identified for Class I, Division 1 or Class I, Division 2 shall, in addition to being marked in accordance with 500.8(C), be permitted to be marked with all of the following: Class I, Zone 1 or Zone 1; Class I, Zone 2 or Zone 2 (as applicable)Applicable gas classification group(s) in accordance with Table 505.9(C)(1)Temperature classification in accordance with 505.9(D) [505.9_(C)_(1)](https://2023.antflix.net#505.9_(C)_(1))", + "displayTitle": "(1) Division Equipment", + "children": [], + "url": "https://2023.antflix.net#505.9_(C)_(1)" + }, + { + "body": "Equipment meeting one or more of the protection techniques described in 505.8 shall be marked with all of the following in the order shown: Class I shall be an optional marking. If it is included in the equipment marking, the Class I marking shall precede the zone marking.Zone in accordance with Chapter 9, Table 13.Symbol \"AEx\".Protection technique(s) in accordance with Chapter 9, Table 13.Applicable material group in accordance with Table 505.9(C)(1) or a specific gas or vapor.Temperature classification in accordance with 505.9(D).Equipment protection level (EPL).Exception No. 1: Associated apparatus NOT suitable for installation in a hazardous (classified) location shall be required to be marked only with 505.9(C)(2)(3), (C)(2)(4), and (C)(2)(5), but BOTH the symbol AEx (3) and the symbol for the type of protection (4) shall be enclosed within the same square brackets, for example, [AEx ia Ga] IIC.Exception No. 2: Simple apparatus as defined in Article 100 shall not be required to have a marked operating temperature or temperature class.Exception No. 3: Fittings for the termination of cables shall not be required to have a marked operating temperature or temperature class.Informational Note No. 1: See Informational Note Figure 505.9(C)(2), for an explanation of the marking that is required. An example of the required marking for intrinsically safe apparatus for installation in Zone 0 is \"Class I, Zone 0, AEx ia IIC T6 Ga\" or \"Zone 0, AEx, ia, IIC T6 Gb.\"Informational Note No. 2: An example of the required marking for intrinsically safe associated apparatus mounted in a flameproof enclosure for installation in Zone 1 is \"Class I, Zone 1 AEx db[ia] IIC T4 Gb\" or \"Zone 1, AEx, db[ia Ga] IIC T4 Gb.\"Informational Note No. 3: An example of the required marking for intrinsically safe associated apparatus NOT for installation in a hazardous (classified) location is \"[AEx ia Ga] IIC.\"Informational Note No. 4: EPLs are designated as G for gas, or D for dust, and are then followed by a letter (a, b, or c) to give the user a better understanding as to whether the equipment provides (a) a \"very high,\" (b) a \"high,\" or (c) an \"enhanced\" level of protection against ignition of an explosive atmosphere. For example, a Zone 1, AEx db IIC T4 Gb motor (which is suitable by protection concept for application in Zone 1) is marked with an EPL of \"Gb\" to indicate that it was provided with a high level of protection.Informational Note No. 5: See ANSI/UL 60079-26, Explosive Atmospheres - Part 26: Equipment with Equipment Protection Level (EPL) Ga, for additional information. Equipment installed outside a Zone 0 location and electrically connected to equipment located inside a Zone 0 location might be marked Zone 0/1. The \"/\" indicates that equipment contains a separation element and can be installed at the boundary between a Zone 0 and a Zone 1 location. [505.9_(C)_(2)](https://2023.antflix.net#505.9_(C)_(2))", + "displayTitle": "(2) Zone Equipment", + "children": [], + "url": "https://2023.antflix.net#505.9_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#505.9_(C)" + }, + { + "body": "The temperature marking shall not exceed the autoignition temperature of the specific gas or vapor to be encountered. Informational Note No. 1: See ANSI/UL 60079-26, Explosive Atmospheres - Part 26: Equipment with Equipment Protection Level (EPL) Ga, for more information. Equipment installed outside a Zone 0 location and electrically connected to equipment located inside a Zone 0 location might be marked Zone 0/1. The \"/'' indicates that equipment contains a separation element and can be installed at the boundary between a Zone 0 and a Zone 1 location. Equipment shall be marked to show the operating temperature or temperature class referenced to a 40\u00b0C ambient, or at the higher ambient temperature if the equipment is rated and marked for an ambient temperature of greater than 40\u00b0C. The temperature class, if provided, shall be indicated using the temperature class (T code) shown in Table 505.9(D). Informational Note Figure 505.9(C)(2) Zone Equipment Marking. Electrical equipment designed for use in the ambient temperature range between \u201420\u00b0C and +40\u00b0C shall require no ambient temperature marking. Electrical equipment that is designed for use in a range of ambient temperatures other than \u201420\u00b0C to +40\u00b0C is considered to be special; and the ambient temperature range shall then be marked on the equipment, including either the symbol \"Ta\" or \"Tamb\" together with the special range of ambient temperatures, in degrees Celsius. Informational Note No. 2: For example, such a marking might be \"\u201430\u00b0C to +40\u00b0C.\" Exception No. 1: Equipment of the non-heat-producing type, such as conduit fittings, and equipment of the heat-producing type having a maximum temperature of not more than 100\u00b0C (212\u00b0F) shall not be required to have a marked operating temperature or temperature class. Exception No. 2: Equipment identified for Class I, Division 1 or Division 2 locations as permitted by 505.20(A), (B), and (C) shall be permitted to be marked in accordance with 505.8(C) and Table 500.8(C)(4). [505.9_(D)](https://2023.antflix.net#505.9_(D))", + "displayTitle": "(D) Temperature Classification Marking", + "children": [], + "url": "https://2023.antflix.net#505.9_(D)" + }, + { + "body": "The supply connection entry thread form shall be NPT or metric. Conduit and fittings shall be made wrench-tight to prevent sparking when fault current flows through the conduit system, and to ensure the explosionproof or flameproof integrity of the conduit system where applicable. Equipment provided with threaded entries for field wiring connections shall be installed in accordance with 505.9(E)(1) or (E)(2) and with (E)(3). [505.9_(E)](https://2023.antflix.net#505.9_(E))", + "displayTitle": "(E) Threading", + "children": [ + { + "body": "For equipment provided with threaded entries for NPT threaded conduit or fittings, listed conduit, listed conduit fittings, or listed cable fittings shall be used. All NPT threaded conduit and fittings shall be threaded with a National (American) Standard Pipe Taper (NPT) thread. NPT threaded entries into explosionproof or flameproof equipment shall be made up with at least five threads fully engaged. Exception: For listed explosionproof or flameproof equipment, factory-threaded NPT entries shall be made up with at least 41/2 threads fully engaged. Informational Note No. 1: See ASME B1.20.1, Pipe Threads, General Purpose (Inch), for thread specifications for male NPT threads. Informational Note No. 2: See ANSI/UL 60079-1, Explosive Atmospheres - Part 1: Equipment Protection by Flameproof Enclosures\"d\", and ASME B1.20.1, Pipe Threads, General Purpose (Inch), for information on female NPT threaded entries using modified National Standard Pipe Taper (NPT) thread. [505.9_(E)_(1)](https://2023.antflix.net#505.9_(E)_(1))", + "displayTitle": "(1) Equipment Provided With Threaded Entries for NPT Threaded Conduit or Fittings", + "children": [], + "url": "https://2023.antflix.net#505.9_(E)_(1)" + }, + { + "body": "For equipment with metric threaded entries, listed conduit fittings or listed cable fittings shall be used. Such entries shall be identified as being metric, or listed adapters to permit connection to conduit or NPT threaded fittings shall be provided with the equipment and shall be used for connection to conduit or NPT threaded fittings. Metric threaded fittings installed into explosionproof or flameproof equipment entries shall have a class of fit of at least 6g/6H and be made up with at least five threads fully engaged. Informational Note: See ISO 965-1, ISO general purpose metric screw threads - Tolerances - Part 1: Principles and basic data, and ISO 965-3, ISO general purpose metric screw threads - Tolerances - Part 3: Deviations for constructional screw threads, for threading specifications for metric threaded entries. [505.9_(E)_(2)](https://2023.antflix.net#505.9_(E)_(2))", + "displayTitle": "(2) Equipment Provided With Threaded Entries for Metric Threaded Conduit or Fittings", + "children": [], + "url": "https://2023.antflix.net#505.9_(E)_(2)" + }, + { + "body": "All unused openings shall be closed with blanking elements or close-up plugs that are listed for the location and will maintain the type of protection. Thread engagement shall comply with 505.9(E)(1) or (E)(2). [505.9_(E)_(3)](https://2023.antflix.net#505.9_(E)_(3))", + "displayTitle": "(3) Unused Openings", + "children": [], + "url": "https://2023.antflix.net#505.9_(E)_(3)" + } + ], + "url": "https://2023.antflix.net#505.9_(E)" + }, + { + "body": "An optical fiber cable, with or without current-carrying conductors (hybrid optical fiber cable), shall be installed to address the associated fire hazard and sealed to address the associated explosion hazard in accordance with 505.15 and 505.16. [505.9_(F)](https://2023.antflix.net#505.9_(F))", + "displayTitle": "(F) Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#505.9_(F)" + }, + { + "body": "For equipment involving sources of optical radiation (such as laser or LED sources) in the wavelength range from 380 nm to 10 pm, the risk of ignition from optical radiation shall be considered for all electrical parts and circuits that may be exposed to the radiation, both inside and outside the optical equipment. This includes optical equipment, which itself is located outside the explosive atmosphere, but its emitted optical radiation enters such atmospheres. Informational Note: See ANSI/UL 60079-28, Explosive Atmospheres - Part 28: Protection of Equipment and Transmission Systems Using Optical Radiation, for information on types of protection to minimize the risk of ignition in explosive atmospheres from optical radiation. Exception: All luminaires (fixed, portable, or transportable) and hand lights, intended to be supplied by mains (with or without galvanic isolation) or powered by batteries, with any continuous divergent light source, including LEDs, shall be excluded from this requirement. Table 505.9(C)(1) Material Groups Material Group Comment IIC See 505.6(A) IIB See 505.6(B) IIA See 505.6(C) Table 505.9(D) Temperature Classification Marking of Maximum Surface Temperature for Group II Electrical Equipment Temperature Class(T Code) Maximum Surface Temperature(\u00b0C) T1 \u2264450 T2 \u2264300 T3 \u2264200 T4 \u2264135 T5 \u2264100 T6 \u226485 [505.9_(G)](https://2023.antflix.net#505.9_(G))", + "displayTitle": "(G) Equipment Involving Optical Radiation", + "children": [], + "url": "https://2023.antflix.net#505.9_(G)" + } + ], + "url": "https://2023.antflix.net#505.9" + }, + { + "body": "Wiring methods shall maintain the integrity of protection techniques and shall comply with 505.15(A) through (C). [505.15](https://2023.antflix.net#505.15)", + "displayTitle": "505.15 Wiring Methods", + "children": [ + { + "body": "In Zone 0 locations, equipment protected by intrinsic safety \"ia\" and equipment protected by encapsulation \"ma\" shall be connected using intrinsically safe \"ia\" circuits with wiring methods in accordance with 504.20. [505.15_(A)](https://2023.antflix.net#505.15_(A))", + "displayTitle": "(A) Zone 0", + "children": [], + "url": "https://2023.antflix.net#505.15_(A)" + }, + { + "displayTitle": "(B) Zone 1", + "children": [ + { + "body": "In Zone 1 locations, the following wiring methods shall be permitted: Informational Note No. 1: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations].All wiring methods permitted by 505.15(A).In restricted industrial establishments where the cable is not subject to physical damage, Type MC-HL cable listed for use in Zone 1 or Class I, Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath, an overall jacket of suitable polymeric material, and a separate equipment grounding conductor(s) in accordance with 250.122. Type MC-HL cable shall be terminated with fittings listed for the application and installed in accordance with Part II of Article 330.In restricted industrial establishments where the cable is not subject to physical damage, Type ITC-HL cable listed for use in Zone 1 or Class I, Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymeric material. Type ITC-HL cable shall be terminated with fittings listed for the application and installed in accordance with 335.4Type MI cable terminated with fittings listed for Zone 1 or Class I, Division 1 locations. Type MI cable shall be installed and supported in a manner to avoid tensile stress at the termination fittings.Threaded rigid metal conduit (RMC) or threaded intermediate metal conduit (IMC), including RMC or IMC conduit systems with supplemental corrosion protection coatings.Where encased in a concrete envelope a minimum of 50 mm (2 in.) thick and provided with not less than 600 mm (24 in.) of cover measured from the top of the conduit to grade, PVC or RTRC conduit. RMC or IMC conduit shall be used for the last 600 mm (24 in.) of the underground run to emergence or to the point of connection to the aboveground raceway. An equipment grounding conductor shall be included to provide for electrical continuity of the raceway system and for grounding of non\u2014current-carrying metal parts.Intrinsic safety type of protection \"ib\" using the wiring methods in accordance with 504.20.Optical fiber cable Type OFNP, Type OFCP, Type OFNR, Type OFCR, Type OFNG, Type OFCG, Type OFN, or Type OFC installed in raceways in accordance with 505.15(B). Optical fiber cable shall be sealed in accordance with 505.16.In restricted industrial establishments for applications limited to 600 volts nominal or less where the cable is not subject to physical damage, Type TC-ER-HL shall be terminated with fittings listed for the location and installed in accordance with 336.10.Informational Note No. 2: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cables and cable fittings.In restricted industrial establishments, listed Type P cable with metal braid armor and an overall jacket. Type P cable shall be terminated with fittings listed for the location and installed in accordance with Part II of Article 337.Informational Note No. 3: See UL 1309A, Outline of Investigation for Cable for use in Mobile Installations, for information on construction, testing, and marking of Type P cable.Informational Note No. 4: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cable fittings. [505.15_(B)_(1)](https://2023.antflix.net#505.15_(B)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#505.15_(B)_(1)" + }, + { + "body": "If flexibility is necessary to minimize the transmission of vibration from equipment during operation or to allow for movement after installation during maintenance, one of the following shall be permitted: Flexible fittings listed for the location.Flexible cord in accordance with 505.17(A), terminated with cord connectors listed for the location.In restricted industrial establishments for applications limited to 600 volts nominal or less, where the cable is not subject to physical damage and is terminated with fittings listed for the location, Type TC-ER-HL cable. Type TC-ER-HL cable shall be listed for use in Class I, Division 1 or Zone 1 locations and shall be installed in accordance with 336.10.Informational Note No. 1: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cables and cable fittings.In restricted industrial establishments listed Type P cable with metal braid armor and an overall jacket. Type P cable shall be terminated with fittings listed for the location and installed in accordance with Part II of Article 337.Informational Note No. 2: See UL 1309A, Outline of Investigation for Cable for Use in Mobile Installations, for information on construction, testing, and marking of Type P cable.Informational Note No. 3: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cable fittings. [505.15_(B)_(2)](https://2023.antflix.net#505.15_(B)_(2))", + "displayTitle": "(2) Flexible Connections", + "children": [], + "url": "https://2023.antflix.net#505.15_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#505.15_(B)" + }, + { + "displayTitle": "(C) Zone 2", + "children": [ + { + "body": "In Zone 2 locations, the following wiring methods shall be permitted: Informational Note No. 1: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations].All wiring methods permitted by 505.15(B).Type MCI, Type MV, Type TC, or Type TC-ER cable, including installation in cable tray systems. Type TC-ER shall include a separate equipment grounding conductor in addition to a drain wire that might be present. The cable shall be terminated with listed fittings. Single conductor Type MV cables shall be shielded or metallic-armored.Type ITC cable or Type ITC-ER cable as permitted in 335.4 and terminated with listed fittings. Type ITC-ER shall include a separate insulated equipment grounding conductor in addition to a drain wire.Type PLTC cable or Type PLTC-ER cable used for Class 2 or Class 3 circuits, including installation in cable tray systems. The cable shall be terminated with listed fittings. Type PLTC-ER shall include a separate insulated equipment grounding conductor in addition to a drain wire that might be present.Enclosed gasketed busways or enclosed gasketed wire-ways.In restricted industrial establishments and where metal conduit does not provide the corrosion resistance needed for the environment where it is installed, listed reinforced thermosetting resin conduit (RTRC), factory elbows, and associated fittings, all marked with the suffix -XW, and Schedule 80 PVC conduit, factory elbows, and associated fittings. Where seals are required for boundary conditions as defined in 505.16(C)(1)(b), the Zone 1 wiring method shall extend into the Zone 2 area to the seal, which shall be located on the Zone 2 side of the Zone 1/Zone 2 boundary.Intrinsic safety type of protection \"ic\" using any of the wiring methods permitted for unclassified locations. Intrinsic safety type of protection \"ic\" systems shall be installed in accordance with the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted in an intrinsic safety type of protection \"ic\" circuit if the simple apparatus does not interconnect the intrinsic safety type of protection \"ic\" systems to any other circuit. Separate intrinsic safety type of protection \"ic\" systems shall be installed in accordance with one of the following:In separate cablesIn multiconductor cables where the conductors of each circuit are within a grounded metal shieldIn multiconductor cables where the conductors of each circuit have insulation with a minimum thickness of 0.25 mm (0.01 in.)Informational Note No. 2: See Article 100 for the definition of simple apparatus.Optical fiber cable of Type OFNP, Type OFCP, Type OFNR, Type OFCR, Type OFNG, Type OFCG, Type OFN, or Type OFC installed in cable trays or any other raceway in accordance with 505.15(C). Optical fiber cable shall be sealed in accordance with 505.16.Cablebus.In restricted industrial establishments, listed Type P cable with or without metal braid armor and an overall jacket. Type P cable shall be terminated with fittings listed for the location and installed in accordance with Part II of Article 337.Informational Note No. 3: See UL 1309A, Outline of Investigation for Cable for Use in Mobile Installations, for information on construction, testing, and marking of Type P cable.Informational Note No. 4: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cable fittings. [505.15_(C)_(1)](https://2023.antflix.net#505.15_(C)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#505.15_(C)_(1)" + }, + { + "body": "Where flexibility is necessary to minimize the transmission of vibration from equipment during operation or to allow for movement after installation during maintenance, one or more of the following wiring methods shall be permitted: Listed flexible metal fittingsFlexible metal conduit with listed fittingsInterlocked armor Type MC cable with listed fittingsType P cableType TC-ER or Type TC-ER-HL cableType ITC-ER or Type ITC-HL cableType PLTC-ER cableLiquidtight flexible metal conduit with listed fittingsLiquidtight flexible nonmetallic conduit with listed fittingsFlexible cord in accordance with 505.17, terminated with a listed cord connector that maintains the type of protection of the terminal compartmentFor elevator use, an identified elevator cable of Type EO, Type ETP, or Type ETT, shown under the \"use\" column in Table 400.4 for \"hazardous (classified) locations\" and terminated with listed fittingsIf flexible conduit is used, it shall be grounded in accordance with 505.30(A) and bonded in accordance with 505.30(B). [505.15_(C)_(2)](https://2023.antflix.net#505.15_(C)_(2))", + "displayTitle": "(2) Flexible Connections", + "children": [], + "url": "https://2023.antflix.net#505.15_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#505.15_(C)" + } + ], + "url": "https://2023.antflix.net#505.15" + }, + { + "body": "Seals in conduit and cable systems shall comply with 505.16(A) through (E). Sealing compound shall be used in Type MI cable termination fittings to exclude moisture and other fluids from the cable insulation. Informational Note No. 1: See 505.16(C)(2)(c). Seals are provided in conduit and cable systems to minimize the passage of gases and vapors and prevent the passage of flames from one portion of the electrical installation to another through the conduit. Such communication through Type VII cable is inherently prevented by construction of the cable. Unless specifically designed and tested for the purpose, conduit and cable seals are not intended to prevent the passage of liquids, gases, or vapors at a continuous pressure differential across the seal. Even at differences in pressure across the seal equivalent to a few inches of water, there might be a slow passage of gas or vapor through a seal and through conductors passing through the seal. Informational Note No. 2: See 505.16(D)(2). Temperature extremes and highly corrosive liquids and vapors can affect the ability of seals to perform their intended function. Informational Note No. 3: Gas or vapor leakage and propagation of flames might occur through the interstices between the strands of standard stranded conductors larger than 2 AWG. Special conductor constructions, for example, compacted strands or sealing of the individual strands, are means of reducing leakage and preventing the propagation of flames. [505.16](https://2023.antflix.net#505.16)", + "displayTitle": "505.16 Sealing and Drainage", + "children": [ + { + "body": "In Zone 0 locations, seals shall be located according to 505.16(A)(1), (A)(2), and (A)(3). [505.16_(A)](https://2023.antflix.net#505.16_(A))", + "displayTitle": "(A) Zone 0", + "children": [ + { + "body": "Seals shall be provided within 3.05 m (10 ft) of where a conduit leaves a Zone 0 location. There shall be no unions, couplings, boxes, or fittings, except listed reducers at the seal, in the conduit run between the seal and the point at which the conduit leaves the location. Exception: A rigid unbroken conduit that passes completely through the Zone 0 location with no fittings less than 300 mm (12 in.) beyond each boundary shall not be required to be sealed if the termination points of the unbroken conduit are in unclassified locations. [505.16_(A)_(1)](https://2023.antflix.net#505.16_(A)_(1))", + "displayTitle": "(1) Conduit Seals", + "children": [], + "url": "https://2023.antflix.net#505.16_(A)_(1)" + }, + { + "body": "Seals shall be provided on cables at the first point of termination after entry into the Zone 0 location. [505.16_(A)_(2)](https://2023.antflix.net#505.16_(A)_(2))", + "displayTitle": "(2) Cable Seals", + "children": [], + "url": "https://2023.antflix.net#505.16_(A)_(2)" + }, + { + "body": "Seals shall not be required to be explosionproof or flameproof. [505.16_(A)_(3)](https://2023.antflix.net#505.16_(A)_(3))", + "displayTitle": "(3) Not Required to Be Explosionproof or Flameproof", + "children": [], + "url": "https://2023.antflix.net#505.16_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#505.16_(A)" + }, + { + "body": "In Zone 1 locations, seals shall be located in accordance with 505.16(B)(1) through (B)(8). [505.16_(B)](https://2023.antflix.net#505.16_(B))", + "displayTitle": "(B) Zone 1", + "children": [ + { + "body": "Conduit seals shall be provided within 50 mm (2 in.) for each conduit entering enclosures having type of protection \"d\", \"db\", \"e\", or \"eb\". Exception No. 1: Where the enclosure having type of protection \"d\" or \"db\" is marked to indicate that a seal is not required. Exception No. 2: For type of protection \"e\" or \"eb\", conduit and fittings employing only NPT to NPT raceway joints or fittings listed for type of protection \"e\" or \"eb\" shall be permitted between the enclosure and the seal, and the seal shall not be required to be within 50 mm (2 in.) of the entry. Informational Note: Examples of fittings employing other than NPT threads include conduit couplings, capped elbows, unions, and breather drains. Exception No. 3: For conduit installed between type of protection \"e\" or \"eb\" enclosures employing only NPT to NPT raceway joints or conduit fittings listed for type of protection \"e\" or \"eb\", a seal shall not be required. [505.16_(B)_(1)](https://2023.antflix.net#505.16_(B)_(1))", + "displayTitle": "(1) Type of Protection \"d\", \"db\", \"e\", or \"eb\" Enclosures", + "children": [], + "url": "https://2023.antflix.net#505.16_(B)_(1)" + }, + { + "body": "Conduit seals shall be provided for each conduit entering explosionproof equipment according to 505.16(B)(2)(a), (B)(2)(b), and (B)(2)(c). In each conduit entry into an explosionproof enclosure where either of the following conditions apply:The enclosure contains apparatus, such as switches, circuit breakers, fuses, relays, or resistors that may produce arcs, sparks, or high temperatures that are considered to be an ignition source in normal operation. For the purposes of this section, high temperatures shall be considered to be any temperatures exceeding 80 percent of the autoignition temperature in degrees Celsius of the gas or vapor involved.Exception: Seals shall not be required for conduit entering an enclosure where such switches, circuit breakers, fuses, relays, or resistors comply with one of the following:Are enclosed within a chamber hermetically sealed against the entrance of gases or vapors.Are immersed in oil.Are enclosed within an enclosure, identified for the location, and marked. \"Leads Factory Sealed,\" \"Factory Sealed,\" \"Seal not Required,\" or equivalent.The entry is metric designator 53 (trade size 2) or larger and the enclosure contains terminals, splices, or taps.An enclosure, identified for the location, and marked \"Leads Factory Sealed,\" or \"Factory Sealed,\" Seal not Required,\" or equivalent shall not be considered to serve as a seal for another adjacent explosionproof enclosure that is required to have a conduit seal.Conduit seals shall be installed within 450 mm (18 in.) from the enclosure. Only threaded couplings, or explosionproof fittings such as unions, reducers, elbows, and capped elbows that are not larger than the trade size of the conduit, shall be permitted between the sealing fitting and the explosionproof enclosure.Where two or more explosionproof enclosures for which conduit seals are required under 505.16(B)(2) are connected by nipples or by runs of conduit not more than 900 mm (36 in.) long, a single conduit seal in each such nipple connection or run of conduit shall be considered sufficient if located not more than 450 mm (18 in.) from either enclosure. [505.16_(B)_(2)](https://2023.antflix.net#505.16_(B)_(2))", + "displayTitle": "(2) Explosionproof Equipment", + "children": [], + "url": "https://2023.antflix.net#505.16_(B)_(2)" + }, + { + "body": "Conduit seals shall be provided in each conduit entry into a pressurized enclosure or pressurized room where the conduit is not pressurized as part of the protection system. Conduit seals shall be installed within 450 mm (18 in.) from the pressurized enclosure or pressurized room. Informational Note No. 1: Installing the seal as close as possible to the enclosure reduces problems with purging the dead airspace in the pressurized conduit. Informational Note No. 2: See NFPA 496, Standard for Purged and Pressurized Enclosures for Electrical Equipment, for information on pressurized equipment. Informational Note No. 3: See UL 60079-13, Explosive Atmospheres - Part 13: Equipment Protection by Pressurized Room \"p\" and Artificially Ventilated Room \"v\", for additional information. [505.16_(B)_(3)](https://2023.antflix.net#505.16_(B)_(3))", + "displayTitle": "(3) Pressurized Enclosures and Pressurized Rooms", + "children": [], + "url": "https://2023.antflix.net#505.16_(B)_(3)" + }, + { + "body": "Conduit seals shall be provided in each conduit run leaving a Zone 1 location. The sealing fitting shall be permitted on either side of the boundary of such location within 3.05 m (10 ft) of the boundary and shall be designed and installed so as to minimize the amount of gas or vapor within the Zone 1 portion of the conduit from being communicated to the conduit beyond the seal. Except for listed explosionproof reducers at the conduit seal, there shall be no union, coupling, box, or fitting between the conduit seal and the point at which the conduit leaves the Zone 1 location. Exception: Metal conduit containing no unions, couplings, boxes, or fittings and passing completely through a Zone 1 location with no fittings less than 300 mm (12 in.) beyond each boundary shall not require a conduit seal if the termination points of the unbroken conduit are in unclassified locations. [505.16_(B)_(4)](https://2023.antflix.net#505.16_(B)_(4))", + "displayTitle": "(4) Zone 1 Boundary", + "children": [], + "url": "https://2023.antflix.net#505.16_(B)_(4)" + }, + { + "body": "Conduits containing cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall be sealed in the Zone 1 location after removing the jacket and any other coverings so that the sealing compound surrounds each individual insulated conductor or optical fiber tube and the outer jacket. Exception: Multiconductor cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall be permitted to be considered as a single conductor by sealing the cable in the conduit within 450 mm (18 in.) of the enclosure and the cable end within the enclosure by an approved means to minimize the entrance of gases or vapors and prevent the propagation of flame into the cable core, or by other approved methods. For shielded cables and twisted pair cables, it shall not be required to remove the shielding material or separate the twisted pair. [505.16_(B)_(5)](https://2023.antflix.net#505.16_(B)_(5))", + "displayTitle": "(5) Cables Capable of Transmitting Gases or Vapors", + "children": [], + "url": "https://2023.antflix.net#505.16_(B)_(5)" + }, + { + "body": "Each multiconductor or optical multifiber cable in conduit shall be considered as a single conductor or single optical fiber tube if the cable is incapable of transmitting gases or vapors through the cable core. These cables shall be sealed in accordance with 505.16(D). [505.16_(B)_(6)](https://2023.antflix.net#505.16_(B)_(6))", + "displayTitle": "(6) Cables Incapable of Transmitting Gases or Vapors", + "children": [], + "url": "https://2023.antflix.net#505.16_(B)_(6)" + }, + { + "body": "Cable seals shall be provided for each cable entering flameproof or explosionproof enclosures. The seal shall comply with 505.16(D). [505.16_(B)_(7)](https://2023.antflix.net#505.16_(B)_(7))", + "displayTitle": "(7) Cables Entering Enclosures", + "children": [], + "url": "https://2023.antflix.net#505.16_(B)_(7)" + }, + { + "body": "Cables shall be sealed at the point at which they leave the Zone 1 location. Exception: Where cable is sealed at the termination point. [505.16_(B)_(8)](https://2023.antflix.net#505.16_(B)_(8))", + "displayTitle": "(8) Zone 1 Boundary", + "children": [], + "url": "https://2023.antflix.net#505.16_(B)_(8)" + } + ], + "url": "https://2023.antflix.net#505.16_(B)" + }, + { + "body": "In Zone 2 locations, seals shall be installed in accordance with 505.16(C)(1) and (C)(2). [505.16_(C)](https://2023.antflix.net#505.16_(C))", + "displayTitle": "(C) Zone 2", + "children": [ + { + "body": "Conduit seals shall be provided in accordance with 505.16(C)(1)(a) through (C)(1)(f). Flameproof and Explosionproof Enclosures. Conduit seals shall be required for connections to enclosures that are required to be flameproof or explosionproof, in accordance with 505.16(B)(1) and (B)(2). All portions of the conduit run or nipple between the seal and enclosure shall comply with 505.16(B).Conduits Between Zone 2 and Unclassified Locations. Conduit seals shall be required in each conduit run passing from a Zone 2 location into an unclassified location. The conduit seals and conduit run shall comply with all the following:The sealing fitting shall be permitted on either side of the boundary of the location within 3.05 m (10 ft) of the boundary.The sealing fitting shall be designed and installed to minimize the amount of gas or vapor within the Zone 2 portion of the conduit from being communicated to the conduit beyond the seal.Threaded rigid metal conduit (RMC) or threaded intermediate metal conduit (IMC) shall be used between the sealing fitting and the point at which the conduit leaves the Zone 2 location, and a threaded connection shall be used at the sealing fitting.There shall be no union, coupling, box, or fitting between the conduit seal and the point at which the conduit leaves the Zone 2 location except for listed explosionproof reducers at the conduit seal.Conduits shall be sealed to minimize the amount of gas or vapor within the Zone 2 portion of the conduit from being communicated to the conduit beyond the seal.Such seals shall not be required to be flameproof or explosionproof but shall be identified for the purpose of minimizing passage of gases under normal operating conditions and shall be accessible.Conduits Passing Through a Zone 2 Location. Metal conduit containing no unions, couplings, boxes, or fittings and passing completely through a Zone 2 location with no fittings less than 300 mm (12 in.) beyond each boundary shall not be required to be sealed if the termination points of the unbroken conduit are in unclassified locations.Conduit Systems Ending in an Unclassified Location. Conduit systems terminating in an unclassified location where a wiring method transition is made to cable tray, cablebus, ventilated busway, Type MI cable, or cable that is not installed in a raceway or cable tray system shall not be required to be sealed where passing from the Zone 2 location into the unclassified location. The unclassified location shall be outdoors or, if the conduit system is all in one room, it shall be permitted to be indoors. The conduits shall not terminate at an enclosure containing an ignition source in normal operation.Pressurized Enclosures or Pressurized Rooms. Conduit systems passing from enclosures or rooms that permit general-purpose equipment as a result of pressurization into a Zone 2 location shall not require a seal at the boundary.Informational Note: See NFPA 496, Standard for Purged and Pressurized Enclosures for Electrical Equipment, for information on purged and pressurized equipment.Outdoor Conduit System Segments. Segments of above-ground conduit systems shall not be required to be sealed where passing from a Zone 2 location into an unclassified location if all the following conditions are met:The conduit system segment shall not pass through a Zone 0 or Zone 1 location where the conduit contains unions, couplings, boxes, or fittings within 300 mm (12 in.) of the Zone 0 or Zone 1 location.The conduit system segment shall be located entirely in an outdoor location.The conduit system segment shall not be directly connected to canned pumps, process or service connections for flow, pressure, or analysis measurement, and so forth, that depend on a single compression seal, diaphragm, or tube to prevent flammable or combustible fluids from entering the conduit system.The conduit system segment shall only have threaded rigid metal conduit (RMC) and threaded intermediate metal conduit (IMC) with threaded unions, couplings, conduit bodies, and fittings in the unclassified location.The conduit system segment shall be sealed at its entry to each enclosure or fitting housing terminals, splices, or taps in Zone 2 locations. [505.16_(C)_(1)](https://2023.antflix.net#505.16_(C)_(1))", + "displayTitle": "(1) Conduit Seals", + "children": [], + "url": "https://2023.antflix.net#505.16_(C)_(1)" + }, + { + "body": "Cable seals shall be installed in accordance with 505.16(C)(2)(a) through (C)(2)(c). Explosionproof and Flameproof Enclosures. Cables entering enclosures required to be flameproof or explosionproof shall be sealed at the point of entrance. The seal shall comply with 505.16(D). Multiconductor or optical multifiber cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall be sealed in the Zone 2 location after removing the jacket and any other coverings so that the sealing compound surrounds each individual insulated conductor or optical fiber tube to minimize the passage of gases and vapors. Multiconductor or optical multifiber cables in conduit shall be sealed as described in 505.16(B)(4).Exception No. 1: Cables passing from an enclosure or room that is unclassified as a result of Type Z pressurization into a Zone 2 location shall not require a seal at the boundary.Exception No. 2: Shielded cables and twisted pair cables shall not require removal of the shielding material or separation of the twisted pairs if the termination is by an approved means to minimize the entrance of gases or vapors and prevent propagation of flame into the cable core.Restricted Breathing Enclosures \"nR\". Cables entering restricted breathing enclosures required to be restricted breathing shall be sealed at the point of entrance into the enclosure. These seals shall be installed in accordance with 505.16(D). Multiconductor cables or multifiber optical fiber cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall be sealed in the Zone 2 location. The jacket and any other coverings shall be removed to allow the sealing compound to surround each individual insulated conductor or optical fiber tube to minimize the passage of gases and vapors. Multiconductor cables or optical fiber cables in conduit shall be sealed as described in 505.16(C)(1)(b).Exception No. 1: Cables passing from an enclosure or room that is unclassified as a result of Type Z pressurization into a Zone 2 location shall not require a seal at the boundary.Exception No. 2: Shielded cables and twisted pair cables terminated with fittings listed for the location shall not require removal of the shielding material or separation of the twisted pairs.Cables That Will Not Transmit Gases or Vapors. Cables with a gas/vaportight continuous sheath that will not transmit gases or vapors through the cable core in excess of the quantity permitted for seal fittings shall not be required to be sealed except as required in 505.16(C)(2)(b). The minimum length of such cable run shall not be less than the length that limits gas or vapor flow through the cable core to the rate permitted for seal fittings [200 cm3/hr (0.007 ft3/hr) of air at a pressure of 1500 pascals (6 in. of water)].Informational Note No. 1: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for further information on construction, testing, and marking of cables, cable fittings, and cord connectors.Informational Note No. 2: The cable core does not include the interstices of the conductor strands.Cables Capable of Transmitting Gases or Vapors. Cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall not be required to be sealed except as required in 505.16(C)(2)(b), unless the cable is attached to process equipment or devices that might cause a pressure in excess of 1500 pascals (6 in. of water) to be exerted at a cable end, in which case a seal, barrier, or other means shall be provided to prevent migration of flammables into an unclassified area.Exception: Cables with an unbroken gas/vaportight continuous sheath shall be permitted to pass through a Zone 2 location without seals.Cables Without a Gas/Vaportight Continuous Sheath. Cables that do not have a gas/vaportight continuous sheath shall be sealed at the boundary of the Zone 2 and unclassified location to minimize the passage of gases or vapors into an unclassified location.Informational Note: The cable sheath can be either metal or a nonmetallic material. [505.16_(C)_(2)](https://2023.antflix.net#505.16_(C)_(2))", + "displayTitle": "(2) Cable Seals", + "children": [], + "url": "https://2023.antflix.net#505.16_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#505.16_(C)" + }, + { + "body": "Where required, seals in Zones 0, 1, and 2 locations shall comply with 505.16(D)(1) through (D)(5). [505.16_(D)](https://2023.antflix.net#505.16_(D))", + "displayTitle": "(D) Zones 0, 1, and 2", + "children": [ + { + "body": "Enclosures for connections or equipment shall be provided with an integral means for sealing, or sealing fittings listed for the location shall be used. Sealing fittings shall be listed for use with one or more specific compounds and shall be accessible. [505.16_(D)_(1)](https://2023.antflix.net#505.16_(D)_(1))", + "displayTitle": "(1) Fittings", + "children": [], + "url": "https://2023.antflix.net#505.16_(D)_(1)" + }, + { + "body": "The compound shall provide a seal against passage of gas or vapors through the seal fitting, shall not be affected by the surrounding atmosphere or liquids, and shall not have a melting point less than 93\u00b0C (200\u00b0F). [505.16_(D)_(2)](https://2023.antflix.net#505.16_(D)_(2))", + "displayTitle": "(2) Compound", + "children": [], + "url": "https://2023.antflix.net#505.16_(D)_(2)" + }, + { + "body": "In a completed seal, the minimum thickness of the sealing compound shall not be less than the trade size of the sealing fitting and, in no case, less than 16 mm (5/8 in.). Exception: Listed cable sealing fittings shall not be required to have a minimum thickness equal to the trade size of the fitting. [505.16_(D)_(3)](https://2023.antflix.net#505.16_(D)_(3))", + "displayTitle": "(3) Thickness of Compounds", + "children": [], + "url": "https://2023.antflix.net#505.16_(D)_(3)" + }, + { + "body": "Splices and taps shall not be made in fittings intended only for sealing with compound, nor shall other fittings in which splices or taps are made be filled with compound. [505.16_(D)_(4)](https://2023.antflix.net#505.16_(D)_(4))", + "displayTitle": "(4) Splices and Taps", + "children": [], + "url": "https://2023.antflix.net#505.16_(D)_(4)" + }, + { + "body": "The cross-sectional area of the conductors or optical fiber tubes (metallic or nonmetallic) permitted in a seal shall not exceed 25 percent of the cross-sectional area of a rigid metal conduit of the same trade size unless it is specifically listed for a higher percentage of fill. [505.16_(D)_(5)](https://2023.antflix.net#505.16_(D)_(5))", + "displayTitle": "(5) Conductor or Optical Fiber Fill", + "children": [], + "url": "https://2023.antflix.net#505.16_(D)_(5)" + } + ], + "url": "https://2023.antflix.net#505.16_(D)" + }, + { + "displayTitle": "(E) Drainage", + "children": [ + { + "body": "Where there is a probability that liquid or other condensed vapor may be trapped within enclosures for control equipment or at any point in the raceway system, approved means shall be provided to prevent accumulation or to permit periodic draining of such liquid or condensed vapor. [505.16_(E)_(1)](https://2023.antflix.net#505.16_(E)_(1))", + "displayTitle": "(1) Control Equipment", + "children": [], + "url": "https://2023.antflix.net#505.16_(E)_(1)" + }, + { + "body": "Where liquid or condensed vapor may accumulate within motors or generators, joints and conduit systems shall be arranged to minimize entrance of liquid. If means to prevent accumulation or to permit periodic draining are necessary, such means shall be provided at the time of manufacture and shall be considered an integral part of the machine. [505.16_(E)_(2)](https://2023.antflix.net#505.16_(E)_(2))", + "displayTitle": "(2) Motors and Generators", + "children": [], + "url": "https://2023.antflix.net#505.16_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#505.16_(E)" + } + ], + "url": "https://2023.antflix.net#505.16" + }, + { + "displayTitle": "505.17 Flexible Cables, Cords and Connections", + "children": [ + { + "body": "A flexible cord shall be permitted for connection between portable lighting equipment or other portable utilization equipment and the fixed portion of their supply circuit. Flexible cord shall also be permitted in restricted industrial establishments for any segment of the circuit where installation of one of the fixed wiring methods of 505.15(B) and (C) will not provide the flexibility needed to minimize the transmission of vibration from equipment during operation or to allow for movement after installation during maintenance operations. The flexible cord shall be protected against physical damage and be continuous for the entire length of the cord from equipment connection to equipment connection. Where flexible cords are used, the cords shall comply with the following: Be of a type listed for extra-hard usageContain, in addition to the conductors of the circuit, an equipment grounding conductor complying with 400.23Be connected to terminals or to supply conductors in an approved mannerBe supported by clamps or by other suitable means in such a manner that there will be no tension on the terminal connectionsWhere the flexible cord enters boxes, fittings, or enclosures that are required to be explosionproof or flameproof, be terminated with a listed cord connector that maintains the type of protectionWhere entering an increased safety \"e\" enclosure, be terminated with a listed increased safety \"e\" cord connectorInformational Note No. 1: See 400.10 for permitted uses of flexible cords.Informational Note No. 2: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations].Electric submersible pumps with means for removal without entering the wet-pit shall be considered portable utilization equipment. The extension of the flexible cord within a suitable raceway between the wet-pit and the power source shall be permitted.Electric mixers intended for travel into and out of open-type mixing tanks or vats shall be considered portable utilization equipment.Informational Note No. 3: See 505.18 for flexible cords exposed to liquids having a deleterious effect on the conductor insulation. [505.17_(A)](https://2023.antflix.net#505.17_(A))", + "displayTitle": "(A) Flexible Cords, Zone 1 and Zone 2", + "children": [], + "url": "https://2023.antflix.net#505.17_(A)" + }, + { + "body": "To facilitate replacements, process control instruments shall be permitted to be connected through flexible cords, attachment plugs, and receptacles, provided that all of the following conditions apply: A switch listed for Zone 2 is provided so that the attachment plug is not depended on to interrupt current, unless the circuit is type \"ia,\" \"ib,\" or \"ic\" protection, in which case the switch is not required.The current does not exceed 3 amperes at 120 volts, nominal.The power-supply cord does not exceed 900 mm (3 ft), is of a type listed for extra-hard usage or for hard usage if protected by location, and is supplied through an attachment plug and receptacle of the locking and grounding type.Only necessary receptacles are provided.The receptacle carries a label warning against unplugging under load. [505.17_(B)](https://2023.antflix.net#505.17_(B))", + "displayTitle": "(B) Instrumentation Connections for Zone 2", + "children": [], + "url": "https://2023.antflix.net#505.17_(B)" + } + ], + "url": "https://2023.antflix.net#505.17" + }, + { + "displayTitle": "505.18 Conductors and Conductor Insulation", + "children": [ + { + "body": "For type of protection \"e,\" field wiring conductors shall be copper. Every conductor (including spares) that enters Type \"e\" equipment shall be terminated at a Type \"e\" terminal. [505.18_(A)](https://2023.antflix.net#505.18_(A))", + "displayTitle": "(A) Conductors", + "children": [], + "url": "https://2023.antflix.net#505.18_(A)" + }, + { + "body": "Where condensed vapors or liquids may collect on, or come in contact with, the insulation on conductors, such insulation shall be of a type identified for use under such conditions, or the insulation shall be protected by a sheath of lead or by other approved means. [505.18_(B)](https://2023.antflix.net#505.18_(B))", + "displayTitle": "(B) Conductor Insulation", + "children": [], + "url": "https://2023.antflix.net#505.18_(B)" + } + ], + "url": "https://2023.antflix.net#505.18" + }, + { + "body": "There shall be no uninsulated exposed parts, such as electrical conductors, buses, terminals, or components, that operate at more than 30 volts (15 volts in wet locations). These parts shall additionally be protected by type of protection \"ia\", \"ib\", or \"ic\" that is suitable for the location. [505.19](https://2023.antflix.net#505.19)", + "displayTitle": "505.19 Uninsulated Exposed Parts", + "children": [], + "url": "https://2023.antflix.net#505.19" + }, + { + "displayTitle": "505.20 Equipment Requirements", + "children": [ + { + "body": "In Zone 0 locations, only equipment specifically listed and marked as suitable for the location shall be permitted. Exception: Intrinsically safe apparatus listed for use in Class I, Division 1 locations for the same gas, or as permitted by 505.9(B)(2), and with a suitable temperature class shall be permitted. [505.20_(A)](https://2023.antflix.net#505.20_(A))", + "displayTitle": "(A) Zone 0", + "children": [], + "url": "https://2023.antflix.net#505.20_(A)" + }, + { + "body": "In Zone 1 locations, only equipment specifically listed and marked as suitable for the location shall be permitted. Exception No. 1: Equipment identified for use in Class I, Division 1 or listed for use in Zone 0 locations for the same gas, or as permitted by 505.9(B)(2), and with a suitable temperature class shall be permitted. Exception No. 2: Equipment identified for Zone 1 or Zone 2 type of protection \"p\" shall be permitted. [505.20_(B)](https://2023.antflix.net#505.20_(B))", + "displayTitle": "(B) Zone 1", + "children": [], + "url": "https://2023.antflix.net#505.20_(B)" + }, + { + "body": "In Zone 2 locations, only equipment specifically listed and marked as suitable for the location shall be permitted. Exception No. 1: Equipment listed for use in Zone 0 or Zone 1 locations for the same gas, or as permitted by 505.9(B)(2), and with a suitable temperature class shall be permitted. Exception No. 2: Equipment identified for Zone 1 or Zone 2 type of protection \"p\" shall be permitted. Exception No. 3: Equipment identified for use in Class I, Division 1 or Division 2 locations for the same gas, or as permitted by 505.9(B)(2), and with a suitable temperature class shall be permitted. Exception No. 4: In Zone 2 locations, the installation of open or nonexplosionproof or nonflameproof enclosed motors such as squirrel-cage induction motors without brushes, switching mechanisms, or similar arc-producing devices that are not identified for use in a Zone 2 location shall be permitted. Exception No. 5: The exposed surface of space heaters used to reduce condensation of moisture during shutdown periods shall not exceed 80 percent of the autoignition temperature in degrees Celsius of the gas or vapor involved when operated at rated voltage, and the maximum space heater surface temperature [based on a 40\u00b0C or higher marked ambient] shall be permanently marked on a visible nameplate mounted on the motor. Otherwise, space heaters shall be identified for Class I, Division 2 or Zone 2 locations. Exception No. 6: A sliding contact shaft bonding device used for the purpose of maintaining the rotor at ground potential shall be permitted where the potential discharge energy is determined to be nonincendive for the application. The shaft bonding device shall be permitted to be installed on the inside or the outside of the motor. Informational Note No. 1: It is important to consider the temperature of internal and external surfaces that might be exposed to the flammable atmosphere. Informational Note No. 2: It is important to consider the risk of ignition due to currents arcing across discontinuities and overheating of parts in multi-section enclosures of large motors and generators. Such motors and generators might need equipotential bonding jumpers across joints in the enclosure and from enclosure to ground. Where the presence of ignitible gases or vapors is suspected, clean air purging might be needed immediately prior to and during start-up periods. Informational Note No. 3: See IEEE STD 1349, IEEE Guide for the Application of Electric Machines in Zone 2 and Class I, Division 2 Hazardous (Classified) Locations, for information on the application of rotating electric machines including shaft bonding devices and potential discharge energy calculations. [505.20_(C)](https://2023.antflix.net#505.20_(C))", + "displayTitle": "(C) Zone 2", + "children": [], + "url": "https://2023.antflix.net#505.20_(C)" + }, + { + "body": "Equipment marked Group IIC shall be permitted for applications requiring Group IIA or Group IIB equipment. Similarly, equipment marked Group IIB shall be permitted for applications requiring Group IIA equipment. Equipment marked for a specific gas or vapor shall be permitted for applications where the specific gas or vapor may be encountered. Informational Note: One common example combines these markings with equipment marked IIB +H2. This equipment is suitable for applications requiring Group IIA equipment, Group IIB equipment, or equipment for hydrogen atmospheres. [505.20_(D)](https://2023.antflix.net#505.20_(D))", + "displayTitle": "(D) Materials", + "children": [], + "url": "https://2023.antflix.net#505.20_(D)" + }, + { + "body": "Electrical equipment installed in hazardous (classified) locations shall be installed in accordance with the instructions (if any) provided by the manufacturer. [505.20_(E)](https://2023.antflix.net#505.20_(E))", + "displayTitle": "(E) Manufacturer's Instructions", + "children": [], + "url": "https://2023.antflix.net#505.20_(E)" + } + ], + "url": "https://2023.antflix.net#505.20" + }, + { + "body": "In Zone 1 locations, increased safety \"e\" motors and generators of all voltage ratings shall be listed for Zone 1 locations, and shall comply with all of the following: Motors shall be marked with the current ratio, IA/IN, and time, tE.Motors shall have controllers marked with the model or identification number, output rating (horsepower or kilowatt), full-load amperes, starting current ratio (IA/IN), and time (tE) of the motors that they are intended to protect; the controller marking shall also include the specific overload protection type (and setting, if applicable) that is listed with the motor or generator.Connections shall be made with the specific terminals listed with the motor or generator.Terminal housings shall be permitted to be of substantial, nonmetallic, nonburning material, provided an internal grounding means between the motor frame and the equipment grounding connection is incorporated within the housing.The provisions of Part III of Article 430 shall apply regardless of the voltage rating of the motor.The motors shall be protected against overload by a separate overload device that is responsive to motor current. This device shall be selected to trip or shall be rated in accordance with the listing of the motor and its overload protection.Sections 430.32(C) and 430.44 shall not apply to such motors.The motor overload protection shall not be shunted or cut out during the starting period.Informational Note: See ANSI/UL 122001, General Requirements for Electrical Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Classified) Locations, for information on ignition systems for reciprocating engines installed in Zone 2 hazardous (classified) locations. Reciprocating engine\u2014driven generators, compressors, and other equipment installed in Zone 2 locations might present a risk of ignition of flammable materials associated with fuel, starting, and compression due to inadvertent release or equipment malfunction by the engine ignition system and controls. [505.22](https://2023.antflix.net#505.22)", + "displayTitle": "505.22 Increased Safety \"e\" Motors and Generators", + "children": [], + "url": "https://2023.antflix.net#505.22" + }, + { + "body": "Process-connected equipment including, but not limited to, canned pumps, submersible pumps, and flow, pressure, temperature, or analysis measurement instruments shall be sealed with a process seal to prevent the migration of process fluids from the designed containment into the external electrical system. Process-connected electrical equipment that incorporates a single process seal, such as a single compression seal, diaphragm, or tube to prevent flammable or combustible fluids from entering a conduit or cable system capable of transmitting fluids, shall be provided with an additional means to mitigate a single process seal failure. The additional means might include, but is not limited to, the following: A suitable barrier meeting the process temperature and pressure conditions to which the barrier is subjected upon failure of the single process seal. There shall be a vent or drain between the single process seal and the suitable barrier. Indication of the single process seal failure shall be provided by visible leakage, an audible whistle, or other means of monitoring.A listed Type MI cable assembly, rated at not less than 125 percent of the process pressure and not less than 125 percent of the maximum process temperature (in degrees Celsius), installed between the cable or conduit and the single process seal.A drain or vent located between the single process seal and a conduit or cable seal. The drain or vent shall be sufficiently sized to prevent overpressuring the conduit or cable seal above 6 in. water column (1493 Pa). Indication of the single process seal failure shall be provided by visible leakage, an audible whistle, or other means of monitoring.An add-on secondary seal marked \"secondary seal\" and rated for the pressure and temperature conditions to which it will be subjected upon failure of the single process seal.Process-connected electrical equipment that does not rely on a single process seal or is listed and marked \"single seal\", \"dual seal\", or \"dual seal without annunciation\" shall not be required to be provided with an additional means of sealing.Process-connected electrical equipment marked \"single seal - install conduit or cable seal\" shall be sealed in accordance with 505.16.Informational Note: See ANSI/UL 122701, Requirements for Process Sealing Between Electrical Systems and Flammable or Combustible Process Fluids, for construction and testing requirements for process sealing of listed and marked single seal, dual seal, or secondary seal equipment. [505.26](https://2023.antflix.net#505.26)", + "displayTitle": "505.26 Process Sealing", + "children": [], + "url": "https://2023.antflix.net#505.26" + }, + { + "body": "Regardless of the voltage of the electrical system, wiring systems and equipment shall comply with 505.30(A) and (B). [505.30](https://2023.antflix.net#505.30)", + "displayTitle": "505.30 Grounding and Bonding", + "children": [ + { + "body": "Wiring systems and equipment shall be grounded in accordance with Part I and Part VI of Article 250, as applicable. [505.30_(A)](https://2023.antflix.net#505.30_(A))", + "displayTitle": "(A) Grounding", + "children": [], + "url": "https://2023.antflix.net#505.30_(A)" + }, + { + "body": "Wiring systems and equipment shall be bonded in accordance with Part I and Part V of Article 250, as applicable, and 505.30(B)(1) and (B)(2). [505.30_(B)](https://2023.antflix.net#505.30_(B))", + "displayTitle": "(B) Bonding", + "children": [ + { + "body": "Bonding shall comply with 505.30(B)(1)(a) and (B)(1)(b). The locknut-bushing and double-locknut types of contacts shall not be depended on for bonding purposes, but bonding jumpers with identified fittings or other approved means of bonding shall be used. These bonding means shall apply to all metal raceways, fittings, boxes, cable trays, and enclosures, and other parts of raceway systems between hazardous (classified) locations and the point of grounding for service equipment or point of grounding for a separately derived system. Metal struts, angles, or channels provided for support and mechanical or physical protection as permitted in 335.4(5), 336.10(7)(c), or 722.135(C) shall be bonded in accordance with 250.102.Where the branch-circuit overcurrent protection is located on the load side of the disconnecting means, the specific bonding means shall be permitted to end at the nearest point where the grounded circuit conductor and the grounding electrode conductor are connected together on the line side of the building or structure disconnecting means as specified in 250.32(B). [505.30_(B)_(1)](https://2023.antflix.net#505.30_(B)_(1))", + "displayTitle": "(1) Specific Bonding Means", + "children": [], + "url": "https://2023.antflix.net#505.30_(B)_(1)" + }, + { + "body": "Flexible metal conduit and liquidtight flexible metal conduit shall comply with 505.30(B)(2)(a) and (B)(2)(b). Flexible metal conduit and liquidtight flexible metal conduit shall include an equipment bonding jumper of the wire type in accordance with 250.102.In Zone 2 locations, the bonding jumper shall not be required where all of the following conditions are met:Listed liquidtight flexible metal conduit 1.8 m (6 ft) or less in length, with fittings listed for grounding, is used.Overcurrent protection in the circuit is limited to 10 amperes or less.The load is part of a meter, instrument, or relay circuit. [505.30_(B)_(2)](https://2023.antflix.net#505.30_(B)_(2))", + "displayTitle": "(2) Flexible Metal Conduit and Liquidtight Flexible Metal Conduit", + "children": [], + "url": "https://2023.antflix.net#505.30_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#505.30_(B)" + } + ], + "url": "https://2023.antflix.net#505.30" + } + ], + "url": "https://2023.antflix.net#505" + }, + { + "displayTitle": "Article 506 Zone 20, 21, and 22 Locations for Combustible Dusts or Ignitible Fibers/Flyings", + "children": [ + { + "displayTitle": "506.1 Scope", + "children": [ + { + "body": "This article covers the requirements for the zone classification system for electrical and electronic equipment and wiring for all voltages where fire and explosion hazards might exist due to combustible dusts, combustible fibers/flyings, or ignitible fibers/flyings for the following: Zone 20 hazardous (classified) locationsZone 21 hazardous (classified) locationsZone 22 hazardous (classified) locationsInformational Note No. 1: See 505.20 or 505.22 for Zone 0, Zone 1, or Zone 2 hazardous (classified) locations where fire or explosion hazards might exist due to flammable gases, flammable vapors, or flammable liquids.Informational Note No. 2: Zone 20, Zone 21, and Zone 22 area classifications are based on the modified IEC area classification system as defined in ANSI/ISA 60079-10-2 (12.10.05), Explosive Atmospheres - Part 10-2: Classification of Areas - Combustible Dust Atmospheres.Informational Note No. 3: See NFPA 499, Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, for information regarding classification of hazardous (classified) locations using Zone methodology. [506.1_(A)](https://2023.antflix.net#506.1_(A))", + "displayTitle": "(A) Covered", + "children": [], + "url": "https://2023.antflix.net#506.1_(A)" + }, + { + "body": "This article does not cover electrical and electronic equipment and wiring of all voltages in the following: Class I, Class II, or Class III, Division 1 or Division 2 hazardous (classified) locations.Zone 0, Zone 1, or Zone 2 hazardous (classified) locations.Locations subject to the unique risk and explosion hazards associated with explosives, pyrotechnics, or blasting agents.Locations where pyrophoric materials are the only materials used or handled.Features of equipment that involve nonelectrical potential sources of ignition (e.g., couplings, pumps, gearboxes, brakes, hydraulic and pneumatic motors, fan, engine, compressor).Informational Note No. 1: Common nonelectrical potential sources of ignition include hot surfaces and mechanically generated sparks.Informational Note No. 2: See ANSI/UL 80079-36, Explosive Atmospheres - Part 36: Non-Electrical Equipment for Explosive Atmospheres - Basic Method and Requirements, and ANSI/UL 80079-37, Explosive Atmospheres - Part 37: Non-Electrical Equipment for Explosive Atmospheres - Non-Electrical Type of Protection Constructional Safety \"c\" Control of Ignition Source \"b\", Liquid Immersion \"k\", for additional information. [506.1_(B)](https://2023.antflix.net#506.1_(B))", + "displayTitle": "(B) Not Covered", + "children": [], + "url": "https://2023.antflix.net#506.1_(B)" + } + ], + "url": "https://2023.antflix.net#506.1" + }, + { + "body": "Areas designated as hazardous (classified) or unclassified locations shall be documented on an area classification drawing and other associated documentation. This documentation shall be made available to the AHJ and to those authorized to design, install, inspect, maintain, or operate electrical equipment. Informational Note No. 1: See ANSI/UL 60079-28, Explosive Atmospheres - Part 28: Protection of equipment and transmission systems using optical radiation, for information concerning the installation of equipment using optical emissions technology (such as laser equipment) that could potentially become an ignition source in hazardous (classified) locations. Informational Note No. 2: See IEC/IEEE 60079-30-2, Explosive atmospheres - Part 30-2: Electrical Resistance Trace Heating - Application Guide for Design, Installation and Maintenance, for information on electrical resistance trace heating for hazardous (classified) locations. Informational Note No. 3: See IEEE 844.2/CSA C293.2, IEEE/CSA Standard for Skin Effect Trace Heating of Pipelines, Vessels, Equipment, and Structures - Application Guide for Design, Installation, Testing, Commissioning, and Maintenance, for information on electric skin effect trace heating for hazardous (classified) locations. Informational Note No. 4: See IEEE 844.4/CSA C293.4, IEEE/CSA Standard for Impedance Heating of Pipelines and Equipment - Application Guide for Design, Installation, Testing, Commissioning, and Maintenance, for information on electric impedance heating for hazardous (classified) locations. [506.4](https://2023.antflix.net#506.4)", + "displayTitle": "506.4 Documentation", + "children": [], + "url": "https://2023.antflix.net#506.4" + }, + { + "displayTitle": "506.5 Classification of Locations", + "children": [ + { + "body": "Locations shall be classified on the basis of the properties of the combustible dust, combustible fibers/flyings, or ignitible fibers/flyings that might be present, and the likelihood that a combustible or ignitible concentration or quantity is present. Each room, section, or area shall be considered individually in determining its classification. [506.5_(A)](https://2023.antflix.net#506.5_(A))", + "displayTitle": "(A) Classifications of Locations", + "children": [], + "url": "https://2023.antflix.net#506.5_(A)" + }, + { + "body": "Zone 20, Zone 21, and Zone 22 locations are those in which combustible dust, combustible fibers/flyings, or ignitible fibers/flyings are or might be present in the air or in layers, in quantities sufficient to produce explosible or ignitible mixtures. Zone 20, Zone 21, and Zone 22 locations shall include those specified in 506.5(B)(1), (B)(2), and (B)(3). Informational Note: Through the exercise of ingenuity in the layout of electrical installations for hazardous (classified) locations, it is frequently possible to locate much of the equipment in a reduced level of classification to reduce the amount of special equipment required. [506.5_(B)](https://2023.antflix.net#506.5_(B))", + "displayTitle": "(B) Zone 20, Zone 21, and Zone 22 Locations", + "children": [ + { + "body": "A Zone 20 location is a location where one of the following apply: Ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings are present continuously or for long periods of time.Group IIIC combustible dusts are present in hazardous quantities continuously or for long periods of time. [506.5_(B)_(1)](https://2023.antflix.net#506.5_(B)_(1))", + "displayTitle": "(1) Zone 20", + "children": [], + "url": "https://2023.antflix.net#506.5_(B)_(1)" + }, + { + "body": "A Zone 21 location is a location where one of the following apply: Ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings are likely to exist occasionally under normal operating conditions.Ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings might exist frequently because of repair or maintenance operations or because of leakage.Equipment is operated or processes are carried on of such a nature that equipment breakdown or faulty operations could result in the release of ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings and also cause simultaneous failure of electrical equipment in a mode to cause the electrical equipment to become a source of ignition.The location is adjacent to a Zone 20 location from which ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings could be communicated.Exception: When communication from an adjacent Zone 20 location is minimized by adequate positive pressure ventilation from a source of clean air, and effective safeguards against ventilation failure are provided.Group IIIC combustible dusts are present in hazardous quantities occasionally, under normal or abnormal operating conditions, or frequently because of repair or maintenance operations or because of leakage.Informational Note No. 1: See ANSI/ISA 60079-10-2 (12.10.05), Explosive Atmospheres - Part 10-2: Classification of Areas - Combustible Dust Atmospheres, regarding the classification of Zone 21 locations.Informational Note No. 2: This classification usually includes the following:Locations outside dust containment and in the immediate vicinity of access doors subject to frequent removal or opening for operation purposes when internal combustible mixtures are presentLocations outside dust containment in the proximity of filling and emptying points, feed belts, sampling points, truck dump stations, belt dump over points, and so on, where no measures are employed to prevent the formation of combustible mixturesLocations outside dust containment where dust accumulates and where, due to process operations, the dust layer is likely to be disturbed and form combustible mixturesLocations inside dust containment where explosible dust clouds are likely to occur (but neither continuously, nor for long periods, nor frequently), for example, silos (if filled and/or emptied only occasionally) and the dirty side of filters if large self-cleaning intervals are occurring [506.5_(B)_(2)](https://2023.antflix.net#506.5_(B)_(2))", + "displayTitle": "(2) Zone 21", + "children": [], + "url": "https://2023.antflix.net#506.5_(B)_(2)" + }, + { + "body": "A Zone 22 location is a location where one of the following apply: Ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings are not likely to occur in normal operation and, if they do occur, will only persist for a short period.Combustible dust, combustible fibers/flyings, or ignitible fibers/flyings are handled, processed, or used, but the dust or fibers/flyings are normally confined within closed containers of closed systems from which they can escape only as a result of the abnormal operation of the equipment with which the dust or fibers/flyings are handled, processed, or used.The location is adjacent to a Zone 21 location, from which ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings could be communicated.Exception No. 1: When communication from an adjacent Zone 21 location is minimized by adequate positive pressure ventilation from a source of clean air, and effective safeguards against ventilation failure are provided.Exception No. 2: For Group IIIC combustible dusts or metal combustible fibers/flyings, there shall only be Zone 20 or 21 locations.Informational Note No. 1: See ANSI/ISA 60079-10-2 (12.10.05), Explosive Atmospheres - Part 10-2: Classification of Areas - Combustible Dust Atmospheres, regarding the classification of Zone 22 locations.Informational Note No. 2: Zone 22 locations usually include the following:Outlets from bag filter vents (in the event of a malfunction, there can be emission of combustible mixtures)Locations near equipment that has to be opened at infrequent intervals or equipment that from experience can easily form leaks where, due to pressure above atmospheric, dust will blow outPneumatic equipment or flexible connections that can become damagedStorage locations for bags containing dusty product (failure of bags can occur during handling, causing dust leakage)Locations where controllable dust layers are formed that are likely to be raised into explosible dust-air mixturesOnly if the layer is removed by cleaning before hazardous dust-air mixtures can be formed is the area designated unclassified.Informational Note No. 3: Protective measures to reduce the formation of explosible dust-air mixtures can often result in a Zone 21 location being classified as a Zone 22 location, or possibly unclassified. Such measures include local exhaust ventilation. [506.5_(B)_(3)](https://2023.antflix.net#506.5_(B)_(3))", + "displayTitle": "(3) Zone 22", + "children": [], + "url": "https://2023.antflix.net#506.5_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#506.5_(B)" + } + ], + "url": "https://2023.antflix.net#506.5" + }, + { + "body": "For the purposes of testing, approval, and area classification, various air mixtures (not oxygen enriched) shall be grouped as follows: Group IIIC: Combustible metal dust, including combustible metal fibers/flyings. [499:3.3.8.2.1]Group IIIB: Combustible dust other than combustible metal dust. [499:3.3.8.2.2]Group IIIA: Combustible fibers/flyings or ignitible fibers/flyings other than metal. [499:3.3.8.2.3]Informational Note No. 1: Group IIIA materials are larger particle-size Group IIIB materials and do not include metal dust or metal fibers/flyings. [499:A.3.3.8.2.3]Informational Note No. 2: Examples of ignitible fibers/flyings include rayon, cotton (including cotton linters and cotton waste), sisal, jute, hemp, cocoa fiber, oakum, and baled waste kapok.Informational Note No. 3: Combustible fibers/flyings include flat platelet-shaped particulates, such as metal flakes, and fibrous board, such as particle board. [506.6](https://2023.antflix.net#506.6)", + "displayTitle": "506.6 Material Groups", + "children": [], + "url": "https://2023.antflix.net#506.6" + }, + { + "body": "This article shall require equipment construction and installation that ensures safe performance under conditions of proper use and maintenance. [506.7](https://2023.antflix.net#506.7)", + "displayTitle": "506.7 Special Precaution", + "children": [ + { + "body": "Classification of areas, engineering and design, selection of equipment and wiring methods, installation, and inspection shall be performed by qualified persons. [506.7_(A)](https://2023.antflix.net#506.7_(A))", + "displayTitle": "(A) Implementation of Zone Classification System", + "children": [], + "url": "https://2023.antflix.net#506.7_(A)" + }, + { + "body": "In instances of areas within the same facility classified separately, Zone 22 locations shall be permitted to abut, but not overlap, Class II or Class III, Division 2 locations. Zone 20 or Zone 21 locations shall not abut Class II or Class III, Division 1 or Division 2 locations. [506.7_(B)](https://2023.antflix.net#506.7_(B))", + "displayTitle": "(B) Dual Classification", + "children": [], + "url": "https://2023.antflix.net#506.7_(B)" + }, + { + "body": "A Class II or Class III, Division 1 or Division 2 location shall be permitted to be reclassified as a Zone 20, Zone 21, or Zone 22 location if all of the space that is classified because of a single combustible dust, combustible fiber/flying, or ignitible fiber/flying source is reclassified under the requirements of this article. [506.7_(C)](https://2023.antflix.net#506.7_(C))", + "displayTitle": "(C) Reclassification Permitted", + "children": [], + "url": "https://2023.antflix.net#506.7_(C)" + }, + { + "body": "Where flammable gases, combustible dusts, combustible fibers/flyings, or ignitible fibers/flyings are or might be present at the same time, the simultaneous presence shall be considered during the selection and installation of the electrical equipment and the wiring methods, including the determination of the safe operating temperature of the electrical equipment. [506.7_(D)](https://2023.antflix.net#506.7_(D))", + "displayTitle": "(D) Simultaneous Presence of Flammable Gases and Combustible Dusts or Fibers/Flyings", + "children": [], + "url": "https://2023.antflix.net#506.7_(D)" + } + ], + "url": "https://2023.antflix.net#506.7" + }, + { + "body": "Acceptable protection techniques for electrical and electronic equipment in hazardous (classified) locations shall be as described in 506.8(A) through (P). Informational Note No. 1: See ANSI/UL 120101, Definitions and Information Pertaining to Electrical Equipment in Hazardous Locations; and ANSI/UL 60079-0, Explosive Atmospheres - Part 0: Equipment - General Requirements, for additional information. Informational Note No. 2: See Chapter 9, Table 13 for descriptions of subdivisions of protection techniques. [506.8](https://2023.antflix.net#506.8)", + "displayTitle": "506.8 Protection Techniques", + "children": [ + { + "body": "This protection technique shall be permitted for equipment in Zone 20, Zone 21, and Zone 22 locations for which it is identified. [506.8_(A)](https://2023.antflix.net#506.8_(A))", + "displayTitle": "(A) Dust Ignitionproof", + "children": [], + "url": "https://2023.antflix.net#506.8_(A)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 21 and Zone 22 locations for which it is identified. [506.8_(B)](https://2023.antflix.net#506.8_(B))", + "displayTitle": "(B) Pressurized", + "children": [], + "url": "https://2023.antflix.net#506.8_(B)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 20, Zone 21, and Zone 22 locations for which it is identified. [506.8_(C)](https://2023.antflix.net#506.8_(C))", + "displayTitle": "(C) Intrinsic Safety", + "children": [], + "url": "https://2023.antflix.net#506.8_(C)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 22 locations for which it is identified. [506.8_(D)](https://2023.antflix.net#506.8_(D))", + "displayTitle": "(D) Dusttight", + "children": [], + "url": "https://2023.antflix.net#506.8_(D)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 20, Zone 21, and Zone 22 locations for which it is identified. [506.8_(E)](https://2023.antflix.net#506.8_(E))", + "displayTitle": "(E) Protection by Encapsulation \"m\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(E)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 22 locations for which it is identified. [506.8_(F)](https://2023.antflix.net#506.8_(F))", + "displayTitle": "(F) Nonincendive Equipment", + "children": [], + "url": "https://2023.antflix.net#506.8_(F)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 20, Zone 21, and Zone 22 locations for which it is identified. [506.8_(G)](https://2023.antflix.net#506.8_(G))", + "displayTitle": "(G) Protection by Enclosure \"t\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(G)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 21 and Zone 22 locations for which it is identified. [506.8_(H)](https://2023.antflix.net#506.8_(H))", + "displayTitle": "(H) Protection by Pressurized Enclosure \"p\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(H)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 20, Zone 21, and Zone 22 locations for which it is listed. [506.8_(I)](https://2023.antflix.net#506.8_(I))", + "displayTitle": "(I) Protection by Intrinsic Safety \"i\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(I)" + }, + { + "body": "This protection technique shall be permitted for electrical resistance trace heating equipment in Zone 21 or Zone 22 for which it is listed. [506.8_(J)](https://2023.antflix.net#506.8_(J))", + "displayTitle": "(J) Protection by Electrical Resistance Trace Heating \"60079-30-1\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(J)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 20, 21, or 22 locations for which the equipment is identified. [506.8_(K)](https://2023.antflix.net#506.8_(K))", + "displayTitle": "(K) Inherently Safe Optical Radiation \"op is\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(K)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 21 or 22 locations for which the equipment is identified. [506.8_(L)](https://2023.antflix.net#506.8_(L))", + "displayTitle": "(L) Protected Optical Radiation \"op pr\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(L)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 20, 21, or 22 locations for which the equipment is identified. [506.8_(M)](https://2023.antflix.net#506.8_(M))", + "displayTitle": "(M) Optical System With Interlock \"op sh\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(M)" + }, + { + "body": "This protection technique shall be permitted for skin effect trace heating equipment in Zone 21 or Zone 22 for which it is listed. [506.8_(N)](https://2023.antflix.net#506.8_(N))", + "displayTitle": "(N) Protection by Skin Effect Trace Heating \"IEEE 844.1\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(N)" + }, + { + "body": "This protection technique shall be permitted in Zone 21 and Zone 22 locations for which it is identified. [506.8_(O)](https://2023.antflix.net#506.8_(O))", + "displayTitle": "(O) Pressurized Room \"P\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(O)" + }, + { + "body": "This protection technique shall be permitted for equipment in Zone 20, Zone 21, or Zone 22 locations for which they are listed. [506.8_(P)](https://2023.antflix.net#506.8_(P))", + "displayTitle": "(P) Special Protection \"S\"", + "children": [], + "url": "https://2023.antflix.net#506.8_(P)" + } + ], + "url": "https://2023.antflix.net#506.8" + }, + { + "displayTitle": "506.9 Equipment Requirements", + "children": [ + { + "body": "Suitability of identified equipment shall be determined by one of the following: Equipment listing or labelingEvidence of equipment evaluation from a qualified testing laboratory or inspection agency concerned with product evaluationEvidence acceptable to the authority having jurisdiction such as a manufacturer's self-evaluation or an owner's engineering judgmentInformational Note: Additional documentation for equipment might include certificates demonstrating compliance with applicable equipment standards, indicating special conditions of use, and other pertinent information. [506.9_(A)](https://2023.antflix.net#506.9_(A))", + "displayTitle": "(A) Suitability", + "children": [], + "url": "https://2023.antflix.net#506.9_(A)" + }, + { + "body": "Equipment that is listed for Zone 20 shall be permitted in a Zone 21 or Zone 22 location of the same combustible dust, combustible fiber/flying, or ignitible fiber/flying. Equipment that is listed for Zone 21 shall be permitted in a Zone 22 location of the same combustible dust, combustible fiber/flying, or ignitible fiber/flying. [506.9_(B)](https://2023.antflix.net#506.9_(B))", + "displayTitle": "(B) Listing", + "children": [], + "url": "https://2023.antflix.net#506.9_(B)" + }, + { + "displayTitle": "(C) Marking", + "children": [ + { + "body": "Equipment identified for Class II, Division 1, Class II, Division 2, Class III, Division 1, or Class III, Division 2 shall, in addition to being marked in accordance with 500.8(C), be permitted to be marked with all of the following: Zone 20, 21, or 22 (as applicable)Material group in accordance with 506.6Maximum surface temperature in accordance with 506.9(D), marked as a temperature value in degrees C, preceded by \"T\" and followed by the symbol \"\u00b0C\" [506.9_(C)_(1)](https://2023.antflix.net#506.9_(C)_(1))", + "displayTitle": "(1) Division Equipment", + "children": [], + "url": "https://2023.antflix.net#506.9_(C)_(1)" + }, + { + "body": "Equipment meeting one or more of the protection techniques described in 506.8 shall be marked with the following in the order shown: Zone in accordance with Chapter 9, Table 13Symbol \"AEx\"Protection technique(s) in accordance with Chapter 9, Table 13Material group in accordance with 506.6Maximum surface temperature in accordance with 506.9(D), marked as a temperature value in degrees Celsius, preceded by \"T\" and followed by the symbol \"\u00b0C\"Ambient temperature marking in accordance with 506.9(D)Equipment protection level (EPL)Informational Note: EPLs are designated as G for gas, or D for dust, and are then followed by a letter (a, b, or c) to give the user a better understanding as to whether the equipment provides (a) a \"very high,\" (b) a \"high,\" or (c) an \"enhanced\" level of protection against ignition of an explosive atmosphere. For example, a Zone 21 AEx pb IIIB T165\u00b0C Db motor is marked with an EPL of \"Db\".Exception: Associated apparatus NOT suitable for installation in a hazardous (classified) location shall be required, to be marked only with 506.9(C)(2)(2) and (C)(2)(3), and where applicable (C)(2)(4), but BOTH the symbol AEx in 506.9(C)(2)(2) and the symbol for the type of protection in 506.9(C)(2)(3) shall be enclosed within the same square brackets; for example, [AEx ia] IIIC. [506.9_(C)_(2)](https://2023.antflix.net#506.9_(C)_(2))", + "displayTitle": "(2) Zone Equipment", + "children": [], + "url": "https://2023.antflix.net#506.9_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#506.9_(C)" + }, + { + "body": "Equipment shall be marked to show the maximum surface temperature referenced to a 40\u00b0C ambient, or at the higher marked ambient temperature if the equipment is rated and marked for an ambient temperature of greater than 40\u00b0C. For equipment installed in a Zone 20 or Zone 21 location, the operating temperature shall be based on operation of the equipment when blanketed with the maximum amount of dust (or with dust-simulating fibers/flyings) that can accumulate on the equipment. Electrical equipment designed for use in the ambient temperature range between -20\u00b0C and +40\u00b0C shall require no additional ambient temperature marking. Electrical equipment that is designed for use in a range of ambient temperatures other than -20\u00b0C and +40\u00b0C is considered to be special, and the ambient temperature range shall then be marked on the equipment, including either the symbol \"Ta\" or \"Tamb\" together with the special range of ambient temperatures. Informational Note: As an example, such a marking might be 30\u00b0C < Ta < +40\u00b0C.\" Exception No. 1: Equipment of the non-heat-producing type, such as conduit fittings, shall not be required to have a marked operating temperature. Exception No. 2: Equipment identified for Class II, Division 1 or Class II, Division 2 locations as permitted by 506.20(B) and (C) shall be permitted to be marked in accordance with 500.8(C) and Table 500.8(C)(4). [506.9_(D)](https://2023.antflix.net#506.9_(D))", + "displayTitle": "(D) Temperature Classifications", + "children": [], + "url": "https://2023.antflix.net#506.9_(D)" + }, + { + "body": "The supply connection entry thread form shall be NPT or metric. Conduit and fittings shall be made wrench-tight to prevent sparking when the fault current flows through the conduit system and to ensure the integrity of the conduit system. Equipment provided with threaded entries for field wiring connections shall be installed in accordance with 506.9(E)(1) or (E)(2) and with (E)(3). [506.9_(E)](https://2023.antflix.net#506.9_(E))", + "displayTitle": "(E) Threading", + "children": [ + { + "body": "For equipment provided with threaded entries for NPT-threaded conduit or fittings, listed conduit fittings or listed cable fittings shall be used. All NPT-threaded conduit and fittings shall be threaded with a National (American) Standard Pipe Taper (NPT) thread. Informational Note: See ASME B1.20.1, Pipe Threads, General Purpose (Inch), for thread specifications for NPT threads. [506.9_(E)_(1)](https://2023.antflix.net#506.9_(E)_(1))", + "displayTitle": "(1) Equipment Provided With Threaded Entries for NPT-Threaded Conduit or Fittings", + "children": [], + "url": "https://2023.antflix.net#506.9_(E)_(1)" + }, + { + "body": "For equipment with metric-threaded entries, listed conduit fittings or listed cable fittings shall be used. Such entries shall be identified as being metric, or listed adapters to permit connection to conduit or NPT-threaded fittings shall be provided with the equipment and shall be used for connection to conduit or NPT-threaded fittings. Metric-threaded fittings installed into equipment entries shall be made up with at least five threads fully engaged. [506.9_(E)_(2)](https://2023.antflix.net#506.9_(E)_(2))", + "displayTitle": "(2) Equipment Provided With Threaded Entries for Metric-Threaded Fittings", + "children": [], + "url": "https://2023.antflix.net#506.9_(E)_(2)" + }, + { + "body": "All unused openings shall be closed with blanking elements or close-up plugs that are listed for the location and will maintain the type of protection. Thread engagement shall comply with the requirements of 506.9(E)(1) or (E)(2). [506.9_(E)_(3)](https://2023.antflix.net#506.9_(E)_(3))", + "displayTitle": "(3) Unused Openings", + "children": [], + "url": "https://2023.antflix.net#506.9_(E)_(3)" + } + ], + "url": "https://2023.antflix.net#506.9_(E)" + }, + { + "body": "An optical fiber cable, with or without current-carrying conductors (hybrid optical fiber cable), shall be installed to address the associated fire hazard and sealed to address the associated explosion hazard in accordance with 506.15 and 506.16. [506.9_(F)](https://2023.antflix.net#506.9_(F))", + "displayTitle": "(F) Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#506.9_(F)" + }, + { + "body": "For equipment involving sources of optical radiation (such as laser or LED sources) in the wavelength range from 380 nm to 10 pm, the risk of ignition from optical radiation shall be considered for all electrical parts and circuits that might be exposed to the radiation, both inside and outside the optical equipment. This includes optical equipment, which itself is located outside the explosive atmosphere but its emitted optical radiation enters such atmospheres. Informational Note: See ANSI/UL 60079-28, Explosive Atmospheres - Part 28: Protection of Equipment and Transmission Systems Using Optical Radiation, for information on types of protection that can be applied to minimize the risk of ignition in explosive atmospheres from optical radiation. Exception: All luminaires (fixed, portable, or transportable) and hand lights intended to be supplied by mains (with or without galvanic isolation) or powered by batteries, with any continuous divergent light source, including LEDs, shall be excluded from this requirement. [506.9_(G)](https://2023.antflix.net#506.9_(G))", + "displayTitle": "(G) Equipment Involving Optical Radiation", + "children": [], + "url": "https://2023.antflix.net#506.9_(G)" + } + ], + "url": "https://2023.antflix.net#506.9" + }, + { + "body": "Wiring methods shall maintain the integrity of the protection techniques and shall comply with 506.15(A), (B), or (C). Informational Note: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations]. [506.15](https://2023.antflix.net#506.15)", + "displayTitle": "506.15 Wiring Methods", + "children": [ + { + "body": "In Zone 20 locations, the following wiring methods shall be permitted: Threaded rigid metal conduit (RMC) or threaded intermediate metal conduit (IMC).Type MI cable terminated with fittings listed for the location. Type MI cable shall be installed and supported in a manner to avoid tensile stress at the termination fittings.Exception No. 1: Type MI cable and fittings listed for Class II, Division 1 locations shall be permitted to be used.Exception No. 2: Equipment identified as intrinsically safe \"ia\" shall be permitted to be connected using the wiring methods identified in 504.20.In restricted industrial establishments, Type MC-HL cable listed for use in Zone 20 locations, with a continuous corrugated metallic sheath, an overall jacket of suitable polymeric material, and a separate equipment grounding conductor(s) in accordance with 250.122, and terminated with fittings listed for the application. Type MC-HL cable shall be installed in accordance with Part II of Article 330.Exception: Type MC-HL cable and fittings listed for Class II, Division 1 locations shall be permitted to be used.In restricted industrial establishments, and where the cable is not subject to physical damage, Type ITC-HL cable listed for use in Zone 1 or Class I, Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymeric material, and terminated with fittings listed for the application. Type ITC-HL cable shall be installed in accordance with 335.4.Fittings and boxes shall be identified for use in Zone 20 locations.Exception: Boxes and fittings listed for Class II, Division 1 locations shall be permitted to be used.If flexible connections are necessary, liquidtight flexible metal conduit (LFMC) with listed fittings, liquidtight flexible nonmetallic conduit (LFNC) with listed fittings, or flexible cord listed for extra-hard usage and provided with listed fittings. Where flexible cords are used, they shall also comply with 506.17 and be terminated with a listed cord connector that maintains the type of protection of the terminal compartment. If flexible connections are subject to oil or other corrosive conditions, the insulation of the conductors shall be of a type listed for the condition or be protected by means of a suitable sheath.Exception No. 1: Liquidtight flexible conduit (LFMC or LFNC), flexible conduit fittings, and cord fittings listed for Class II, Division 1 locations shall be permitted.Exception No. 2: For elevator use, an identified elevator cable of Type EO, Type ETP, or Type ETT, shown under the \"use\" column in Table 400.4 for \"hazardous (classified) locations,\" and terminated with listed connectors that maintain the type of protection of the terminal compartment shall be permitted.Informational Note No. 1: See 506.30 for grounding requirements where flexible conduit is used.Informational Note No. 2: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cables, cable fittings, and cord connectors.Optical fiber cable Type OFNP, Type OFCP, Type OFNR, Type OFCR, Type OFNG, Type OFCG, Type OFN, or Type OFC installed in raceways in accordance with 506.15(A). Optical fiber cables shall be sealed in accordance with 506.16. [506.15_(A)](https://2023.antflix.net#506.15_(A))", + "displayTitle": "(A) Zone 20", + "children": [], + "url": "https://2023.antflix.net#506.15_(A)" + }, + { + "body": "In Zone 21 locations, the following wiring methods shall be permitted: All wiring methods permitted in 506.15(A)Fittings and boxes that are dusttight, that are provided with threaded bosses for connection to conduit, and in which taps, joints, or terminal connections are not made and are not used in locations where metal dust is presentInformational Note: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cables, cable fittings, and cord connectors.Exception: Equipment identified as intrinsically safe \"ib\" shall be permitted to be connected using the wiring methods identified in 504.20. [506.15_(B)](https://2023.antflix.net#506.15_(B))", + "displayTitle": "(B) Zone 21", + "children": [], + "url": "https://2023.antflix.net#506.15_(B)" + }, + { + "body": "In Zone 22 locations, the following wiring methods shall be permitted: All wiring methods permitted in 506.15(B).Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with listed threaded or threadless fittings.Electrical metallic tubing (EMT) or dusttight wireways.Type MC or Type MI cable with listed termination fittings.Type PLTC cable or Type PLTC-ER cable used in Class 2 or Class 3 circuits, including installation in cable tray systems. The cable shall be terminated with listed fittings. Type PLTC-ER cable shall include an equipment grounding conductor in addition to a drain wire that might be present.Type ITC cable or Type ITC-ER cable as permitted in 335.4 and terminated with listed fittings. Type ITC-ER cable shall include an equipment grounding conductor in addition to a drain wire.Type MV, Type TC, or Type TC-ER cable, including installation in cable tray systems. Type TC-ER cable shall include an equipment grounding conductor in addition to a drain wire that might be present. The cable shall be terminated with listed fittings.Intrinsic safety type of protection \"ic\" using any of the wiring methods permitted for unclassified locations. Intrinsic safety type of protection \"ic\" systems shall be installed in accordance with the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted in a circuit of intrinsic safety type of protection \"ic\", provided that the simple apparatus does not interconnect the intrinsic safety type of protection \"ic\" circuit to any other circuit. Separation of circuits of intrinsic safety type of protection \"ic\" shall be in accordance with one of the following:Be in separate cablesBe in multiconductor cables where the conductors of each circuit are within a grounded metal shieldBe in multiconductor cables where the conductors have insulation with a minimum thickness of 0.25 mm (0.01 in.)Informational Note: See Article 100 for the definition of simple apparatus.Boxes and fittings shall be dusttight.Optical fiber cable Type OFNP, Type OFCP, Type OFNR, Type OFCR, Type OFNG, Type OFCG, Type OFN, or Type OFC installed in cable trays or any raceway in accordance with 506.15(C). Optical fiber cables shall be sealed in accordance with 506.16.Cablebus. [506.15_(C)](https://2023.antflix.net#506.15_(C))", + "displayTitle": "(C) Zone 22", + "children": [], + "url": "https://2023.antflix.net#506.15_(C)" + } + ], + "url": "https://2023.antflix.net#506.15" + }, + { + "body": "Where necessary to protect against the ingress of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings, or to maintain the type of protection, seals shall be provided. The seal shall be identified as capable of preventing the ingress of combustible dust, combustible fiber/flying, or ignitible fiber/flying and maintaining the type of protection but need not be explosionproof or flameproof. [506.16](https://2023.antflix.net#506.16)", + "displayTitle": "506.16 Sealing", + "children": [], + "url": "https://2023.antflix.net#506.16" + }, + { + "body": "Flexible cords used in Zone 20, Zone 21, and Zone 22 locations shall comply with all of the following: Be of a type listed for extra-hard usageContain, in addition to the conductors of the circuit, an equipment grounding conductor complying with 400.23Be connected to terminals or to supply conductors in an approved mannerBe supported by clamps or by other suitable means in such a manner to minimize tension on the terminal connectionsBe terminated with a listed cord connector that maintains the protection technique of the terminal compartmentInformational Note: See ANSI/UL 2225, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations, for information on construction, testing, and marking of cables, cable fittings, and cord connectors. [506.17](https://2023.antflix.net#506.17)", + "displayTitle": "506.17 Flexible Cords", + "children": [], + "url": "https://2023.antflix.net#506.17" + }, + { + "displayTitle": "506.20 Equipment Installation", + "children": [ + { + "body": "In Zone 20 locations, only equipment listed and marked as suitable for the location shall be permitted. Exception No. 1: Equipment listed for use in Class II, Division 1 locations with a suitable temperature class shall be permitted. Exception No. 2: For locations involving Group IIIA materials, equipment listed for use in Class III, Division 1 locations with a suitable temperature in accordance with 500.8(D)(3) shall be permitted. [506.20_(A)](https://2023.antflix.net#506.20_(A))", + "displayTitle": "(A) Zone 20", + "children": [], + "url": "https://2023.antflix.net#506.20_(A)" + }, + { + "body": "In Zone 21 locations, only equipment listed and marked as suitable for the location shall be permitted. Exception No. 1: Apparatus listed for use in Class II, Division 1 locations with a suitable temperature class shall be permitted. Exception No. 2: Pressurized equipment identified for Class II, Division 1 shall be permitted. Exception No. 3: For locations involving Group IIIA materials, equipment listed for use in Class III, Division 1 locations with a suitable temperature in accordance with 500.8(D)(3) shall be permitted. [506.20_(B)](https://2023.antflix.net#506.20_(B))", + "displayTitle": "(B) Zone 21", + "children": [], + "url": "https://2023.antflix.net#506.20_(B)" + }, + { + "body": "In Zone 22 locations, only equipment listed and marked as suitable for the location shall be permitted. Exception No. 1: Apparatus listed for use in Class II, Division 1 or Class II, Division 2 locations with a suitable temperature class shall be permitted. Exception No. 2: Pressurized equipment identified for Class II, Division 1 or Division 2 shall be permitted. Exception No. 3: For Group IIIA materials, equipment listed for use in Class III, Division 1 or Class III, Division 2 locations with a suitable temperature in accordance with 500.8(D)(3) shall be permitted. [506.20_(C)](https://2023.antflix.net#506.20_(C))", + "displayTitle": "(C) Zone 22", + "children": [], + "url": "https://2023.antflix.net#506.20_(C)" + }, + { + "body": "Equipment marked Group IIIC shall be permitted for applications requiring Group IIIA or Group IIIB equipment. Similarly, equipment marked Group IIIB shall be permitted for applications requiring Group IIIA equipment. [506.20_(D)](https://2023.antflix.net#506.20_(D))", + "displayTitle": "(D) Material Group", + "children": [], + "url": "https://2023.antflix.net#506.20_(D)" + }, + { + "body": "Electrical equipment installed in hazardous (classified) locations shall be installed in accordance with the manufacturer's instructions, if provided. [506.20_(E)](https://2023.antflix.net#506.20_(E))", + "displayTitle": "(E) Manufacturer's Instructions", + "children": [], + "url": "https://2023.antflix.net#506.20_(E)" + }, + { + "body": "The temperature marking specified in 506.9(C)(2)(5) shall comply with 506.20(F)(1) or (F)(2): Combustible dusts or combustible fibers/flyings shall be less than the lower of either the layer or cloud ignition temperature of the specific combustible dust or combustible fiber/flying. For nonmetal dusts or nonmetal combustible fibers/flyings that might dehydrate or carbonize, the temperature marking shall not exceed the lower of either the ignition temperature or 165\u00b0C (329\u00b0F).For ignitible fibers/flyings, less than 165\u00b0C (329\u00b0F) for equipment that is not subject to overloading, or 120\u00b0C (248\u00b0F) for equipment (such as motors or power transformers) that may be overloaded.Informational Note: See NFPA 499, Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, for minimum ignition temperatures of specific dusts. [506.20_(F)](https://2023.antflix.net#506.20_(F))", + "displayTitle": "(F) Temperature", + "children": [], + "url": "https://2023.antflix.net#506.20_(F)" + } + ], + "url": "https://2023.antflix.net#506.20" + }, + { + "body": "Regardless of the voltage of the electrical system, wiring systems and equipment shall comply with 506.30(A) and (B). [506.30](https://2023.antflix.net#506.30)", + "displayTitle": "506.30 Grounding and Bonding", + "children": [ + { + "body": "Wiring systems and equipment shall be grounded in accordance with Part I and Part VI of Article 250, as applicable. [506.30_(A)](https://2023.antflix.net#506.30_(A))", + "displayTitle": "(A) Grounding", + "children": [], + "url": "https://2023.antflix.net#506.30_(A)" + }, + { + "body": "Bonding shall comply with Part I and Part V of Article 250, as applicable, and 506.30(B)(1) and (B)(2). [506.30_(B)](https://2023.antflix.net#506.30_(B))", + "displayTitle": "(B) Bonding", + "children": [ + { + "body": "Bonding shall comply with 506.30(B)(1)(a) and (B)(1)(b). The locknut-bushing and double-locknut types of contacts shall not be depended on for bonding purposes, but bonding jumpers with identified fittings or other approved means of bonding shall be used. These bonding means shall apply to all metal raceways, fittings, boxes, cable trays, and enclosures, and other parts of raceway systems between hazardous (classified) locations and the point of grounding for service equipment or point of grounding for a separately derived system. Metal struts, angles, or channels provided for support and mechanical or physical protection as permitted in 335.4(5), 336.10(7)(c), or 722.135(C) shall be bonded in accordance with 250.102.Where the branch-circuit overcurrent protection is located on the load side of the disconnecting means, the specific bonding means shall be permitted to end at the nearest point where the grounded circuit conductor and the grounding electrode conductor are connected together on the line side of the building or structure disconnecting means as specified in 250.32(B). [506.30_(B)_(1)](https://2023.antflix.net#506.30_(B)_(1))", + "displayTitle": "(1) Specific Bonding Means", + "children": [], + "url": "https://2023.antflix.net#506.30_(B)_(1)" + }, + { + "body": "Liquidtight flexible metal conduit shall comply with 506.30(B)(2)(a) and (B)(2)(b). Liquidtight flexible metal conduit shall include an equipment bonding jumper of the wire type in accordance with 250.102.In Zone 22 locations, the bonding jumper shall not be required where all of the following conditions are met:Listed liquidtight flexible metal conduit 1.8 m (6 ft) or less in length, with fittings listed for grounding, is used.Overcurrent protection in the circuit is limited to 10 amperes or less.The load is part of a meter, instrument, or relay circuit. [506.30_(B)_(2)](https://2023.antflix.net#506.30_(B)_(2))", + "displayTitle": "(2) Liquidtight Flexible Metal Conduit", + "children": [], + "url": "https://2023.antflix.net#506.30_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#506.30_(B)" + } + ], + "url": "https://2023.antflix.net#506.30" + } + ], + "url": "https://2023.antflix.net#506" + }, + { + "displayTitle": "Article 511 Commercial Garages, Repair and Storage", + "children": [ + { + "body": "These occupancies shall include locations used for service and repair operations in connection with self-propelled vehicles (including, but not limited to, passenger automobiles, buses, trucks, and tractors) in which volatile flammable liquids or flammable gases are used for fuel or power. Informational Note: See NFPA 30A-2021, Code for Motor Fuel Dispensing Facilities and Repair Garages, for extracted text that is followed by a reference in brackets. Only editorial changes were made to the extracted text to make it consistent with this Code. [511.1](https://2023.antflix.net#511.1)", + "displayTitle": "511.1 Scope", + "children": [], + "url": "https://2023.antflix.net#511.1" + }, + { + "body": "In addition to the requirements of this article, these occupancies shall comply with Table 511.2, as applicable, except as modified by this article. Table 511.2 Other Articles Requirement Division Classified Locations Zone Classified Locations Area classification 500.5, 500.6 505.5, 505.6, 505.7 Equipment Part III of 501, 505.8, 505.9, 500.7, 500.8, 501.5 505.20, 505.22 Wiring Part II of 501 505.15, 505.16, 505.17, 505.18, 505.19, 505.26, 505.30 [511.2](https://2023.antflix.net#511.2)", + "displayTitle": "511.2 Other Articles", + "children": [], + "url": "https://2023.antflix.net#511.2" + }, + { + "body": "Where Class I liquids or gaseous fuels are stored, handled, or transferred, electrical wiring and electrical utilization equipment shall be designed in accordance with the requirements for Class I, Division 1 or 2 hazardous (classified) locations as classified in accordance with 500.5 and 500.6, and this article. A Class I location shall not extend beyond an unpierced wall, roof, or other solid partition that has no openings. [30A:8.3.1, 8.3.3] Where the term \"Class I\" is used with respect to Zone classifications within this article of the Code, it shall apply to Zone 0, Zone 1, and Zone 2 designations. Informational Note: The term \"Class I\" was originally included as a prefix to Zone 0, Zone 1, and Zone 2 locations and references as an identifier for flammable gases, vapors, or liquids to differentiate from Class II and Class III locations. Zone 0, Zone 1, and Zone 2 only apply to flammable gases, vapors, or liquids so the \"Class I\" prefix is redundant and has been deleted, except for text that is extracted from other documents or to remain consistent throughout this article. [511.3](https://2023.antflix.net#511.3)", + "displayTitle": "511.3 Area Classification, General", + "children": [ + { + "body": "Parking garages used for parking or storage shall be permitted to be unclassified. Informational Note: See NFPA 88A, Standard for Parking Structures, and NFPA 30A, Code for Motor Fuel Dispensing Facilities and Repair Garages, for additional information. [511.3_(A)](https://2023.antflix.net#511.3_(A))", + "displayTitle": "(A) Parking Garages", + "children": [], + "url": "https://2023.antflix.net#511.3_(A)" + }, + { + "body": "Major and minor repair garages that dispense motor fuels into the fuel tanks of vehicles, including flammable liquids having a flash point below 38\u00b0C (100\u00b0F) such as gasoline, or gaseous fuels such as natural gas, hydrogen, or LPG, shall have the dispensing functions and components classified in accordance with Table 514.3(B)(1) in addition to any classification required by this section. Where Class I liquids, other than fuels, are dispensed, the area within 900 mm (3 ft) of any fill or dispensing point, extending in all directions, shall be a Class I, Division 2 location. [511.3_(B)](https://2023.antflix.net#511.3_(B))", + "displayTitle": "(B) Repair Garages, With Dispensing", + "children": [], + "url": "https://2023.antflix.net#511.3_(B)" + }, + { + "body": "Where vehicles using Class I liquids or heavier-than-air gaseous fuels (such as LPG) are repaired, hazardous area classification shall be in accordance with Table 511.3(C). Informational Note: See NFPA 30A, Code for Motor Fuel Dispensing Facilities and Repair Garages, Table 8.3.2, for additional information. [511.3_(C)](https://2023.antflix.net#511.3_(C))", + "displayTitle": "(C) Repair Garages, Major and Minor", + "children": [], + "url": "https://2023.antflix.net#511.3_(C)" + }, + { + "body": "Where vehicles using lighter-than-air gaseous fuels (such as hydrogen and natural gas) are repaired or stored, hazardous area classification shall be in accordance with Table 511.3(D). Informational Note: See NFPA 30A, Code for Motor Fuel Dispensing Facilities and Repair Garages, Table 8.3.2, for additional information. [511.3_(D)](https://2023.antflix.net#511.3_(D))", + "displayTitle": "(D) Repair Garages, Major", + "children": [], + "url": "https://2023.antflix.net#511.3_(D)" + }, + { + "displayTitle": "(E) Modifications to Classification", + "children": [ + { + "body": "Areas adjacent to classified locations in which flammable vapors are not likely to be released, such as stock rooms, switchboard rooms, and other similar locations, shall be unclassified where mechanically ventilated at a rate of four or more air changes per hour, designed with positive air pressure, or separated by an unpierced wall, roof, or other solid partition. [511.3_(E)_(1)](https://2023.antflix.net#511.3_(E)_(1))", + "displayTitle": "(1) Specific Areas Adjacent to Classified Locations", + "children": [], + "url": "https://2023.antflix.net#511.3_(E)_(1)" + }, + { + "body": "The area used for storage, handling, or dispensing into motor vehicles of alcohol-based windshield washer fluid in repair garages shall be unclassified unless otherwise classified by a provision of 511.3. [30A: 8.3.1, Exception] Table 511.3(C) Extent of Classified Locations for Major and Minor Repair Garages with Heavier-Than-Air Fuel Location Class I Extent of Classified Location Division(Group D) Zone(Group IIA) Repair garage, major(where Class I liquids or gaseous fuels are transferred or dispensed*) 1 1 Entire space within any pit, belowgrade work area, or subfloor work area that is not ventilated 2 2 Entire space within any pit, belowgrade work area, or subfloor work area that is provided with ventilation of at least 0.3 m3/min/m2 (1 ft3/min/ft2) of floor area, with suction taken from a point within 300 mm (12 in.) of floor level 2 2 Up to 450 mm (18 in.) above floor level of the room, except as noted below, for entire floor area Unclassified Unclassified Up to 450 mm (18 in.) above floor level of the room where room is provided with ventilation of at least 0.3 m3/min/m2(1 ft3/min/ft2) of floor area, with suction taken from a point within 300 mm (12 in.) of floor level 2 2 Within 0.9 m (3 ft) of any fill or dispensing point, extending in all directions Specific areas adjacent to classified locations Unclassified Unclassified Areas adjacent to classified locations where flammable vapors are not likely to be released, such as stock rooms, switchboard rooms, and other similar locations, where mechanically ventilated at a rate of four or more air changes per hour or designed with positive air pressure or where effectively separated by walls or partitions Repair garage, minor(where Class I liquids or gaseous fuels are not transferred or dispensed*) 2 2 Entire space within any pit, belowgrade work area, or subfloor work area that is not ventilated 2 2 Up to 450 mm (18 in.) above floor level, extending 0.9 m (3 ft) horizontally in all directions from opening to any pit, belowgrade work area, or subfloor work area that is not ventilated Unclassified Unclassified Entire space within any pit, belowgrade work area, or subfloor work area that is provided with ventilation of at least 0.3 m3/min/m2 (1 ft3/min/ft2) of floor area, with suction taken from a point within 300 mm (12 in.) of floor level Specific areas adjacent to classified locations Unclassified Unclassified Areas adjacent to classified locations where flammable vapors are not likely to be released, such as stock rooms, switchboard rooms, and other similar locations, where mechanically ventilated at a rate of four or more air changes per hour or designed with positive air pressure or where effectively separated by walls or partitions *Includes draining of Class I liquids from vehicles. Table 511.3(D) Extent of Classified Locations for Major Repair Garages with Lighter-than-Air Fuel Location Class I Extent of Classified Location Division2 Zone3 Repair garage, major(where lighter-than-air gaseous fueled1 vehicles are repaired or stored) 2 2 Within 450 mm (18 in.) of ceiling, except as noted below Unclassified Unclassified Within 450 mm (18 in.) of ceiling where ventilation of at least 0.3 m3/min/m2(1 ft3/min/ft2) of floor area is provided, with suction taken from a point within 450 mm (18 in.) of the highest point in the ceiling Specific areas adjacent to classified locations Unclassified Unclassified Areas adjacent to classified locations where flammable vapors are not likely to be released, such as stock rooms, switchboard rooms, and other similar locations, where mechanically ventilated at a rate of four or more air changes per hour, designed with positive air pressure, or effectively separated by walls or partitions 1Includes fuels such as hydrogen and natural gas, but not LPG. 2For hydrogen (lighter than air) Group B, or natural gas Group D. 3For hydrogen (lighter than air) Group IIC or IIB+H2, or natural gas Group IIA. [511.3_(E)_(2)](https://2023.antflix.net#511.3_(E)_(2))", + "displayTitle": "(2) Alcohol-Based Windshield Washer Fluid", + "children": [], + "url": "https://2023.antflix.net#511.3_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#511.3_(E)" + } + ], + "url": "https://2023.antflix.net#511.3" + }, + { + "displayTitle": "511.4 Wiring and Equipment in Class I Locations", + "children": [ + { + "body": "Wiring located within Class I locations as classified in 511.3 shall conform with the requirements of Part II of Article 501 or 504.20, as applicable. [511.4_(A)](https://2023.antflix.net#511.4_(A))", + "displayTitle": "(A) Wiring Located in Class I Locations", + "children": [], + "url": "https://2023.antflix.net#511.4_(A)" + }, + { + "body": "Within Class I locations as defined in 511.3, equipment shall conform with the requirements of Part III of Article 501 or 504.10, as applicable. [511.4_(B)](https://2023.antflix.net#511.4_(B))", + "displayTitle": "(B) Equipment Located in Class I Locations", + "children": [ + { + "body": "Where fuel-dispensing units (other than liquid petroleum gas, which is prohibited) are located within buildings, 514.1 shall apply. Where mechanical ventilation is provided in the dispensing area, the control shall be interlocked so that the dispenser cannot operate without ventilation, in accordance with 500.5(B)(2). [511.4_(B)_(1)](https://2023.antflix.net#511.4_(B)_(1))", + "displayTitle": "(1) Fuel-Dispensing Units", + "children": [], + "url": "https://2023.antflix.net#511.4_(B)_(1)" + }, + { + "body": "Portable lighting equipment shall be equipped with a handle, lampholder, hook, and substantial guard attached to the lampholder or handle. All exterior surfaces that might come in contact with battery terminals, wiring terminals, or other objects shall be of nonconducting material or shall be effectively protected with insulation. Lampholders shall be of an unswitched type and shall not provide means for plug-in of attachment plugs. The outer shell shall be of molded composition or other suitable material. Unless the lamp and its cord are supported or arranged in such a manner that they cannot be used in the locations classified in 511.3, they shall be of a type identified for Class I, Division 1 locations. [511.4_(B)_(2)](https://2023.antflix.net#511.4_(B)_(2))", + "displayTitle": "(2) Portable Lighting Equipment", + "children": [], + "url": "https://2023.antflix.net#511.4_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#511.4_(B)" + } + ], + "url": "https://2023.antflix.net#511.4" + }, + { + "displayTitle": "511.7 Wiring and Equipment Installed Above Hazardous (Classified) Locations", + "children": [ + { + "displayTitle": "(A) Wiring in Spaces Above Hazardous (Classified) Locations", + "children": [ + { + "body": "Fixed wiring above hazardous (classified) locations shall be permitted to be one or more of the following:Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with listed threaded or threadless fittings, or electrical metallic conduit (EMT) with listed fittings.Rigid polyvinyl chloride conduit (PVC), reinforced thermosetting resin conduit (RTRC), or electrical nonmetallic tubing (ENT).Flexible metal conduit (FMC), liquidtight flexible metal conduit (LFMC), or liquidtight flexible nonmetallic conduit (LFNC), with listed fittings.Type MC cable, Type AC cable, Type TC cable, or Type TC-ER cable, including installation in cable trays. Type TC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire. All cable types shall have listed fittings.Type MI cable terminated with listed fittings and supported in a manner to avoid tensile stress.Manufactured wiring systems.Type PLTC cable or Type PLTC-ER cable in Class I, Class 2, or Class 3 circuits. Type PLTC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Type ITC cable or Type ITC-ER cable in accordance with 335.4 and 335.5, terminated with listed fittings. Type ITC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Cellular metal floor raceways or cellular concrete floor raceways only for supplying ceiling outlets or extensions to the area below the floor. Such raceways shall have no connections leading into or through any Class I location above the floor. [511.7_(A)_(1)](https://2023.antflix.net#511.7_(A)_(1))", + "displayTitle": "(1) Fixed Wiring Above Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#511.7_(A)_(1)" + }, + { + "body": "For pendants, flexible cord suitable for the type of service and listed for hard usage shall be used. [511.7_(A)_(2)](https://2023.antflix.net#511.7_(A)_(2))", + "displayTitle": "(2) Pendant", + "children": [], + "url": "https://2023.antflix.net#511.7_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#511.7_(A)" + }, + { + "displayTitle": "(B) Electrical Equipment Installed Above Hazardous (Classified) Locations", + "children": [ + { + "body": "Electrical equipment in a fixed position shall be located above the level of any defined hazardous (classified) location or shall be identified for the location. Arcing Equipment. Equipment that is less than 3.7 m (12 ft) above the floor level and that might produce arcs, sparks, or particles of hot metal, such as cutouts, switches, charging panels, generators, motors, or other equipment (excluding receptacles, lamps, and lampholders) having make-and-break or sliding contacts, shall be of the totally enclosed type or constructed to prevent the escape of sparks or hot metal particles.Fixed Lighting. Lamps and lampholders for fixed lighting that is located over lanes through which vehicles are commonly driven or that might otherwise be exposed to physical damage shall be located not less than 3.7 m (12 ft) above floor level, unless of the totally enclosed type or constructed to prevent escape of sparks or hot metal particles. [511.7_(B)_(1)](https://2023.antflix.net#511.7_(B)_(1))", + "displayTitle": "(1) Fixed Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#511.7_(B)_(1)" + } + ], + "url": "https://2023.antflix.net#511.7_(B)" + } + ], + "url": "https://2023.antflix.net#511.7" + }, + { + "body": "Underground wiring shall be installed in accordance with one of the following wiring methods: Threaded rigid metal conduit (RMC) or threaded intermediate metal conduit (IMC) with listed threaded fittings.Rigid polyvinyl chloride conduit (PVC), reinforced thermosetting resin conduit (RTRC), or high-density polyethylene conduit (HDPE) where buried under not less than 600 mm (2 ft) of cover. Where PVC conduit, RTRC conduit, or HDPE conduit is used, threaded rigid metal conduit or threaded intermediate metal conduit shall be used for the last 600 mm (2 ft) of the underground run to emergence or to the point of connection to the above-ground raceway, and an equipment grounding conductor shall be included to provide electrical continuity of the raceway system and for grounding of non\u2014current-carrying metal parts. [511.8](https://2023.antflix.net#511.8)", + "displayTitle": "511.8 Underground Wiring Below Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#511.8" + }, + { + "body": "Seals complying with the requirements of 501.15 and 501.15(B)(2) shall be provided and shall apply to horizontal as well as vertical boundaries of the defined Class I locations. [511.9](https://2023.antflix.net#511.9)", + "displayTitle": "511.9 Sealing", + "children": [], + "url": "https://2023.antflix.net#511.9" + }, + { + "displayTitle": "511.10 Special Equipment", + "children": [ + { + "body": "Battery chargers and their control equipment, and batteries being charged, shall not be located within locations classified in 511.3. [511.10_(A)](https://2023.antflix.net#511.10_(A))", + "displayTitle": "(A) Battery Charging Equipment", + "children": [], + "url": "https://2023.antflix.net#511.10_(A)" + }, + { + "displayTitle": "(B) Electric Vehicle Charging Equipment", + "children": [ + { + "body": "All electrical equipment and wiring shall be installed in accordance with Part III of Article 625, except as required by 511.10(B)(2) and (B)(3). Flexible cords shall be of a type identified for extra-hard usage. [511.10_(B)_(1)](https://2023.antflix.net#511.10_(B)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#511.10_(B)_(1)" + }, + { + "body": "No connector shall be located within a Class I location as defined in 511.3. [511.10_(B)_(2)](https://2023.antflix.net#511.10_(B)_(2))", + "displayTitle": "(2) Connector Location", + "children": [], + "url": "https://2023.antflix.net#511.10_(B)_(2)" + }, + { + "body": "Where the cord is suspended from overhead, it shall be arranged so that the lowest point of sag is at least 150 mm (6 in.) above the floor. Where an automatic arrangement is provided to pull both cord and plug beyond the range of physical damage, no additional connector shall be required in the cable or at the outlet. [511.10_(B)_(3)](https://2023.antflix.net#511.10_(B)_(3))", + "displayTitle": "(3) Plug Connections to Vehicles", + "children": [], + "url": "https://2023.antflix.net#511.10_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#511.10_(B)" + } + ], + "url": "https://2023.antflix.net#511.10" + }, + { + "body": "Ground-fault circuit-interrupter protection for personnel shall be provided as required in 210.8(B). [511.12](https://2023.antflix.net#511.12)", + "displayTitle": "511.12 Ground-Fault Circuit-Interrupter Protection for Personnel", + "children": [], + "url": "https://2023.antflix.net#511.12" + }, + { + "displayTitle": "511.16 Grounding and Bonding Requirements", + "children": [ + { + "body": "All metal raceways, the metal armor or metallic sheath on cables, and all non\u2014current-carrying metal parts of fixed or portable electrical equipment, regardless of voltage, shall be grounded. [511.16_(A)](https://2023.antflix.net#511.16_(A))", + "displayTitle": "(A) General Grounding Requirements", + "children": [], + "url": "https://2023.antflix.net#511.16_(A)" + }, + { + "body": "Grounding in Class I locations shall comply with 501.30. [511.16_(B)](https://2023.antflix.net#511.16_(B))", + "displayTitle": "(B) Supplying Circuits With Grounded and Grounding Conductors in Class I Locations", + "children": [ + { + "body": "Where a circuit supplies portables or pendants and includes a grounded conductor in accordance with 200.3, receptacles, attachment plugs, connectors, and similar devices shall be of the grounding type and the grounded conductor of the flexible cord shall be connected to the screw shell of any lamp-holder or to the grounded terminal of any utilization equipment supplied. [511.16_(B)_(1)](https://2023.antflix.net#511.16_(B)_(1))", + "displayTitle": "(1) Circuits Supplying Portable Equipment or Pendants", + "children": [], + "url": "https://2023.antflix.net#511.16_(B)_(1)" + }, + { + "body": "Approved means shall be provided for maintaining continuity of the equipment grounding conductor between the fixed wiring system and the non\u2014current-carrying metal portions of pendant luminaires, portable luminaires, and portable utilization equipment. [511.16_(B)_(2)](https://2023.antflix.net#511.16_(B)_(2))", + "displayTitle": "(2) Approved Means", + "children": [], + "url": "https://2023.antflix.net#511.16_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#511.16_(B)" + } + ], + "url": "https://2023.antflix.net#511.16" + } + ], + "url": "https://2023.antflix.net#511" + }, + { + "displayTitle": "Article 512 Cannabis Oil Equipment and Cannabis Oil Systems Using Flammable Materials", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_76_I" + }, + { + "body": "This article covers cannabis oil preparatory equipment, extraction equipment, booths, postprocessing equipment, and systems using flammable materials (flammable gas, flammable liquid\u2014produced vapor, combustible liquid-produced vapor) in commercial and industrial facilities. Informational Note No. 1: See ANSI/UL 1389, Plant Oil Extraction Equipment for Installation and Use in Ordinary (Unclassified) Locations and Hazardous (Classified) Locations, for information on cannabis oil equipment and systems for hazardous (classified) locations. Informational Note No. 2: See NFPA 1, Fire Code, NFPA 55, Compressed Gases and Cryogenic Fluids Code, NFPA 58, Liquefied Petroleum Gas Code, and ICC IFC, International Fire Code, together with the manufacturer's installation instructions, for information on the installation of cannabis oil equipment and systems. [512.1](https://2023.antflix.net#512.1)", + "displayTitle": "512.1 Scope", + "children": [], + "url": "https://2023.antflix.net#512.1" + }, + { + "body": "In addition to the requirements of this article, cannabis oil equipment and cannabis oil systems using flammable materials shall comply with Table 512.2, as applicable, except as modified by this article. Table 512.2 Other Articles Requirement Division Classified Locations Zone Classified Locations Area classification 500.5, 500.6 505.5, 505.6, 505.7 Equipment Part III of 501, 500.7, 500.8, 501.5 505.8, 505.9, 505.20, 505.22 Wiring Part II of 501 505.15, 505.16, 505.17, 505.18, 505.19, 505.26, 505.30 [512.2](https://2023.antflix.net#512.2)", + "displayTitle": "512.2 Other Articles", + "children": [], + "url": "https://2023.antflix.net#512.2" + }, + { + "body": "Cannabis oil equipment and systems that can release flammable materials during operation shall be classified in accordance with 512.3(A) and (B). Informational Note No. 1: Some cannabis oil applications can result in the release of heavier-than-air flammable gases or vapors into the surrounding atmosphere as a normal part of the overall extraction process (e.g., during disconnecting or opening of vessels containing flammable solvents, or during off-gassing of spent material or extracted plant oil). Cannabis oil equipment and systems can also include the connection of external containers, or other external sources, of flammable solvent. Informational Note No. 2: See NFPA 30, Flammable and Combustible Liquids Code, NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials; and NFPA 497, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, for information on area classification. Informational Note No. 3: See NFPA 36, Standard for Solvent Extraction Plants, for information on area classification in commercial-scale extraction processes. [512.3](https://2023.antflix.net#512.3)", + "displayTitle": "512.3 Classified Locations", + "children": [ + { + "displayTitle": "(A) Cannabis Oil Equipment and Systems Other Than Booths", + "children": [ + { + "body": "For sources of gases or vapors from a flammable material, the location shall be classified in accordance with the following and as shown in Figure 512.3(A)(1): The space within 915 mm (3 ft) in all directions from any such equipment or container and extending to the floor or grade level shall be classified as Class I, Division 1 or Zone 1, whichever is applicable.The space extending 610 mm (2 ft) beyond the Class I, Division 1 or Zone 1 location shall be classified as Class I, Division 2 or Zone 2, whichever is applicable.The space extending 1525 mm (5 ft) horizontally beyond the space described in 512.3(A)(1)(2) up to a height of 460 mm (18 in.) above the floor or grade level shall be classified as Class I, Division 2 or Zone 2, whichever is applicable.The space inside of a tank or container and the inside of equipment that contains a flammable material shall be classified as Class I, Division 1 or Zone 0, whichever is applicable.Sumps, pits, or belowgrade channels within 3.05 m (10 ft) horizontally of a vapor source shall be classified as Class I, Division 1 or Zone 1. If the sump, pit, or channel extends beyond 3.05 m (10 ft) horizontally from the vapor source, it shall be provided with a vapor stop or classified as Class I, Division 1 or Zone 1 for its entire length. [512.3_(A)_(1)](https://2023.antflix.net#512.3_(A)_(1))", + "displayTitle": "(1) Where Flammable Gases or Vapors Are Released", + "children": [], + "url": "https://2023.antflix.net#512.3_(A)_(1)" + }, + { + "body": "Where listed equipment is marked to indicate that the level of release during disconnection or opening is maintained below 25 percent LFL without ventilation, flammable solvents shall not be released during the extraction process except during disconnecting or opening of vessels containing flammable solvents, or during off-gassing of spent material or extracted plant oil. For sources of gas or vapor from a flammable material, the location shall be classified in accordance with the following and as shown in Figure 512.3(A)(2):The space within 915 mm (3 ft) in all directions from any such equipment or container and extending to the floor or grade level shall be classified as Class I, Division 2 or Zone 2, whichever is applicable.The space extending beyond the Division 2 or Zone 2 area shall be unclassified.The space inside of a tank or container and the inside of equipment that contains a flammable material shall be classified as Class I, Division 1 or Zone 0, whichever is applicable.The space extending 2134 mm (7 ft) horizontally beyond the space described in 512.3(A)(2)(1) up to a height of 460 mm (18 in.) above the floor or grade level shall be classified as Class I, Division 2 or Zone 2, whichever is applicable.Sumps, pits, or belowgrade channels within 3.05 m (10 ft) horizontally of a vapor source shall be classified as Class I, Division 1 or Zone 1. If the sump, pit, or channel extends beyond 3.05 m (10 ft) horizontally from the vapor source, it shall be provided with a vapor stop or it shall be classified as Class I, Division 1 or Zone 1 for its entire length. [512.3_(A)_(2)](https://2023.antflix.net#512.3_(A)_(2))", + "displayTitle": "(2) Where Flammable Gases or Vapors Are Not Released, Except During Disconnection or Opening", + "children": [], + "url": "https://2023.antflix.net#512.3_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#512.3_(A)" + }, + { + "body": "Air exhausted from the booths shall not be recirculated or exhausted from the booths into the room in which the booths are installed. Ventilation other than exhaust ventilation can be provided to the booth, but cannot be recirculated or exhausted from the booth into the room in which the booth is installed. [512.3_(B)](https://2023.antflix.net#512.3_(B))", + "displayTitle": "(B) Cannabis Oil Booths", + "children": [ + { + "body": "For sources of gas or vapor from a flammable material, the location shall be classified in accordance with the following and as shown in Figure 512.3(B)(1): The space within the booth shall be classified as Class I, Division 1 or Zone 1, whichever is applicable.The space within 915 mm (3 ft) of any opening shall be classified as Class I, Division 2 or Zone 2, whichever is applicable.The interior of fresh air supply ducts and fresh air supply plenums shall be unclassified. [512.3_(B)_(1)](https://2023.antflix.net#512.3_(B)_(1))", + "displayTitle": "(1) Where Flammable Gases or Vapors Are Released", + "children": [], + "url": "https://2023.antflix.net#512.3_(B)_(1)" + }, + { + "body": "Where listed equipment is marked to indicate that the level of release during disconnection or opening is maintained below 25 percent LFL without ventilation, flammable solvents shall not be released during the extraction process except during disconnecting or opening of vessels containing flammable solvents, or during off-gassing of spent material or extracted plant oil. For sources of gas or vapor from a flammable material, the location shall be classified in accordance with the following and as shown in Figure 512.3(B)(2):The space within the booth shall be classified as Class I, Division 2 or Zone 2, whichever is applicable.The space outside any opening shall be unclassified.The interior of fresh air supply ducts and fresh air supply plenums shall be unclassified.FIGURE 512.3(A)(1) Area Classification for Equipment and Systems Other than Booths, Where Flammable Gases or Vapors Are Released.FIGURE 512.3(A)(2) Area Classification for Equipment and Systems Other than Booths, Where Flammable Gases or Vapors Are Not Released Except During Disconnection or Opening.FIGURE 512.3(B)(1) Area Classification for Booths Where Flammable Gases or Vapors Are Released.FIGURE 512.3(B)(2) Area Classification for Booths Where Flammable Gases or Vapors Are Not Released Except During Disconnection or Opening. [512.3_(B)_(2)](https://2023.antflix.net#512.3_(B)_(2))", + "displayTitle": "(2) Where Flammable Gases or Vapors Are Not Released, Except During Disconnection or Opening", + "children": [], + "url": "https://2023.antflix.net#512.3_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#512.3_(B)" + } + ], + "url": "https://2023.antflix.net#512.3" + }, + { + "displayTitle": "Part II Wiring", + "children": [], + "url": "https://2023.antflix.net#divider_76_II" + }, + { + "body": "All wiring installed or operated within any of the hazardous (classified) locations defined in 512.3 shall comply with the requirements of Part II of Article 501 or 505.15, as applicable, for the division or zone location in which it is installed. [512.10](https://2023.antflix.net#512.10)", + "displayTitle": "512.10 Wiring Installation and Operation", + "children": [], + "url": "https://2023.antflix.net#512.10" + }, + { + "body": "Other than above cannabis oil booths, all fixed wiring installed at an elevation above hazardous (classified) locations [see Figure 512.3(A)(1) and Figure 512.3(A)(2)] shall be in metal raceways, PVC conduit, RTRC conduit, or ENT conduit. Where used, cables shall be Type MI, Type TC, or Type MC. [512.13](https://2023.antflix.net#512.13)", + "displayTitle": "512.13 Wiring Installed Above Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#512.13" + }, + { + "displayTitle": "Part III Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_67_III" + }, + { + "body": "Installation of cannabis oil equipment and systems shall be in a distinct room or area located at commercial or industrial facilities. Where all electrical equipment within cannabis oil booths is listed for Class I, Division 1 or Zone 1 locations, gas detection shall not be required to be provided within the booth. Where gas detection in accordance with 500.7(K) is provided within booths listed for Class I, Division 2 or Zone 2 locations, electrical equipment shall be permitted. [512.20](https://2023.antflix.net#512.20)", + "displayTitle": "512.20 Equipment and Systems", + "children": [ + { + "body": "Equipment that is used to prepare the plant material for subsequent extraction of the plant oil (e.g., trimming, deseeding, drying/curing) shall be listed for the location. [512.20_(A)](https://2023.antflix.net#512.20_(A))", + "displayTitle": "(A) Cannabis Oil Preparatory Equipment", + "children": [], + "url": "https://2023.antflix.net#512.20_(A)" + }, + { + "body": "Equipment that uses flammable materials (solvents) in the process of extracting the plant oil from the plant material shall be listed for the location. Informational Note: Extraction equipment can use flammable materials as solvents to extract the plant oil from the plant material by saturating the plant material in a vented container, sealed container, or pressure vessel. Typical flammable materials used in the extraction process include butane, ethanol, hexane, pentane, propane, and LPG. [512.20_(B)](https://2023.antflix.net#512.20_(B))", + "displayTitle": "(B) Cannabis Oil Extraction Equipment", + "children": [], + "url": "https://2023.antflix.net#512.20_(B)" + }, + { + "body": "Enclosed areas used to house cannabis oil equipment and systems shall be listed for the location. Informational Note: Cannabis oil booths can be designed to house a single piece or multiple pieces of cannabis oil equipment. Booths range in size and can be large enough to permit entrance of personnel to perform the processing tasks. [512.20_(C)](https://2023.antflix.net#512.20_(C))", + "displayTitle": "(C) Cannabis Oil Booths", + "children": [], + "url": "https://2023.antflix.net#512.20_(C)" + }, + { + "body": "Equipment that is used in the final processing stages of the extracted plant oil (e.g., vacuum ovens, rotary evaporators, solvent recovery pumps) shall be listed for the location. [512.20_(D)](https://2023.antflix.net#512.20_(D))", + "displayTitle": "(D) Cannabis Oil Post-Processing Equipment", + "children": [], + "url": "https://2023.antflix.net#512.20_(D)" + }, + { + "body": "Any combination of cannabis oil equipment needed for the overall extraction process (e.g., cannabis oil preparatory equipment, cannabis oil extraction equipment, cannabis oil booths, cannabis oil post-processing equipment) shall be listed for the location. Informational Note: See NFPA 70B, Recommended Practice for Electrical Equipment Maintenance, for information related to general electrical equipment maintenance and developing an effective electrical preventive maintenance (EPM) program. [512.20_(E)](https://2023.antflix.net#512.20_(E))", + "displayTitle": "(E) Cannabis Oil Systems", + "children": [], + "url": "https://2023.antflix.net#512.20_(E)" + } + ], + "url": "https://2023.antflix.net#512.20" + }, + { + "body": "All equipment installed or operated within any of the classified locations defined in 512.3 shall comply with the requirements of Part III of Article 501 or 505.9, as applicable, for the division or zone area in which they are used. [512.22](https://2023.antflix.net#512.22)", + "displayTitle": "512.22 Equipment Installed in Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#512.22" + }, + { + "body": "Equipment that could produce arcs, sparks, or hot metal particles, such as lamps and lampholders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make-and-break or sliding contacts, where installed above a classified location other than cannabis oil booths, shall be of the totally enclosed type or be constructed to prevent the escape of sparks or hot metal particles. [512.30](https://2023.antflix.net#512.30)", + "displayTitle": "512.30 Equipment Installed Above Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#512.30" + }, + { + "body": "Cannabis oil preparatory equipment, extraction equipment, booths, and post-processing equipment shall be listed and marked to show the hazardous (classified) location for which it is permitted to be installed. [512.32](https://2023.antflix.net#512.32)", + "displayTitle": "512.32 Marking", + "children": [ + { + "body": "Equipment for Class I, Division 1 or Class I, Division 2 shall be marked in accordance with 500.8(C). [512.32_(A)](https://2023.antflix.net#512.32_(A))", + "displayTitle": "(A) Division Equipment", + "children": [], + "url": "https://2023.antflix.net#512.32_(A)" + }, + { + "body": "Equipment for Zone 1 or Zone 2 shall be marked in accordance with 500.8(C)(2). [512.32_(B)](https://2023.antflix.net#512.32_(B))", + "displayTitle": "(B) Zone Equipment", + "children": [], + "url": "https://2023.antflix.net#512.32_(B)" + } + ], + "url": "https://2023.antflix.net#512.32" + } + ], + "url": "https://2023.antflix.net#512" + }, + { + "displayTitle": "Article 513 Aircraft Hangars", + "children": [ + { + "body": "This article shall apply to buildings or structures in any part of which aircraft containing Class I (flammable) liquids or Class II (combustible) liquids whose temperatures are above their flash points are housed or stored and in which aircraft might undergo service, repairs, or alterations. It shall not apply to locations used exclusively for aircraft that have never contained fuel or unfueled aircraft. Informational Note No. 1: See NFPA 409, Standard on Aircraft Hangars, for definitions of aircraft hangar and unfueled aircraft. Informational Note No. 2: See NFPA 30, Flammable and Combustible Liquids Code, for information on fuel classification. [513.1](https://2023.antflix.net#513.1)", + "displayTitle": "513.1 Scope", + "children": [], + "url": "https://2023.antflix.net#513.1" + }, + { + "body": "In addition to the requirements of this article, aircraft hangars shall comply with Table 513.2, as applicable, except as modified by this article. Table 513.2 Other Articles Requirement Division Classified Locations Zone Classified Locations Area classification 500.5, 500.6 505.5, 505.6, 505.7 Equipment Part III of 501, 505.8, 505.9, 500.7, 500.8, 501.5 505.20, 505.22 Wiring Part II of 501 505.15, 505.16, 505.17, 505.18, 505.19, 505.26, 505.30 [513.2](https://2023.antflix.net#513.2)", + "displayTitle": "513.2 Other Articles", + "children": [], + "url": "https://2023.antflix.net#513.2" + }, + { + "body": "Where the term \"Class I\" is used with respect to Zone classifications within this article of the Code, it shall apply to Zone 0, Zone 1, and Zone 2 designations. Informational Note: The term \"Class I\" was originally included as a prefix to Zone 0, Zone 1, and Zone 2 locations and references as an identifier for flammable gases, vapors, or liquids to differentiate from Class II and Class III locations. Zone 0, Zone 1, and Zone 2 only apply to flammable gases, vapors, or liquids so the \"Class I\" prefix is redundant and has been deleted, except for text that is extracted from other documents or to remain consistent throughout this article. [513.3](https://2023.antflix.net#513.3)", + "displayTitle": "513.3 Classification of Locations", + "children": [ + { + "body": "Any pit or depression below the level of the hangar floor shall be classified as a Class I, Division 1 or Zone 1 location that shall extend up to said floor level. [513.3_(A)](https://2023.antflix.net#513.3_(A))", + "displayTitle": "(A) Below Floor Level", + "children": [], + "url": "https://2023.antflix.net#513.3_(A)" + }, + { + "body": "The entire area of the hangar, including any adjacent and communicating areas not suitably separated from the hangar, shall be classified as a Class I, Division 2 or Zone 2 location up to a level 450 mm (18 in.) above the floor. [513.3_(B)](https://2023.antflix.net#513.3_(B))", + "displayTitle": "(B) Areas Not Separated or Ventilated", + "children": [], + "url": "https://2023.antflix.net#513.3_(B)" + }, + { + "displayTitle": "(C) Vicinity of Aircraft", + "children": [ + { + "body": "The area within 1.5 m (5 ft) horizontally from aircraft power plants or aircraft fuel tanks shall be classified as a Class I, Division 2 or Zone 2 location that shall extend upward from the floor to a level 1.5 m (5 ft) above the upper surface of wings and engine enclosures. [513.3_(C)_(1)](https://2023.antflix.net#513.3_(C)_(1))", + "displayTitle": "(1) Aircraft Maintenance and Storage Hangars", + "children": [], + "url": "https://2023.antflix.net#513.3_(C)_(1)" + }, + { + "body": "The area within 3 m (10 ft) horizontally from aircraft surfaces from the floor to 3 m (10 ft) above the aircraft shall be classified as Class I, Division 1 or Zone 1. The area horizontally from aircraft surfaces between 3.0 m (10 ft) and 9.0 m (30 ft) from the floor to 9.0 m (30 ft) above the aircraft surface shall be classified as Class I, Division 2 or Zone 2. Informational Note: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, for information on ventilation and grounding for static protection in spray painting areas. [513.3_(C)_(2)](https://2023.antflix.net#513.3_(C)_(2))", + "displayTitle": "(2) Aircraft Painting Hangars", + "children": [], + "url": "https://2023.antflix.net#513.3_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#513.3_(C)" + }, + { + "body": "Adjacent areas in which flammable liquids or vapors are not likely to be released, such as stock rooms, electrical control rooms, and other similar locations, shall be unclassified where mechanically ventilated at a rate of four or more air changes per hour, designed with positive air pressure, or effectively separated from the hangar itself by walls or partitions. [513.3_(D)](https://2023.antflix.net#513.3_(D))", + "displayTitle": "(D) Areas Suitably Separated and Ventilated", + "children": [], + "url": "https://2023.antflix.net#513.3_(D)" + } + ], + "url": "https://2023.antflix.net#513.3" + }, + { + "displayTitle": "513.4 Wiring and Equipment in Class I Locations", + "children": [ + { + "body": "All wiring and equipment that is installed or operated within any of the hazardous (classified) locations defined in 513.3 shall comply with the applicable requirements of the hazardous (classified) locations. Attachment plugs and receptacles shall be identified for the location or shall be designed so they cannot be energized while the connections are being made or broken. [513.4_(A)](https://2023.antflix.net#513.4_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#513.4_(A)" + }, + { + "body": "Electrical wiring, outlets, and equipment (including lamps) on or attached to stanchions, rostrums, or docks that are located in a hazardous (classified) location as defined in 513.3(C) shall comply with the applicable requirements of Parts II and III of Article 501 or 505.17 through 505.30. as applicable. [513.4_(B)](https://2023.antflix.net#513.4_(B))", + "displayTitle": "(B) Stanchions, Rostrums, and Docks", + "children": [], + "url": "https://2023.antflix.net#513.4_(B)" + } + ], + "url": "https://2023.antflix.net#513.4" + }, + { + "displayTitle": "513.7 Wiring and Equipment Not Installed in Class I Locations", + "children": [ + { + "body": "All fixed wiring in a hangar but not installed in a Class I location as classified in 513.3 shall be installed in metal raceways or shall be Type MI, TC, or MC cable. Exception: Wiring in unclassified locations, as described in, 513.3(D), shall be permitted to be any suitable type wiring method recognized in Chapter 3. [513.7_(A)](https://2023.antflix.net#513.7_(A))", + "displayTitle": "(A) Fixed Wiring", + "children": [], + "url": "https://2023.antflix.net#513.7_(A)" + }, + { + "body": "For pendants, flexible cord suitable for the type of service and identified for hard usage or extra-hard usage shall be used. Each such cord shall include a separate equipment grounding conductor. [513.7_(B)](https://2023.antflix.net#513.7_(B))", + "displayTitle": "(B) Pendants", + "children": [], + "url": "https://2023.antflix.net#513.7_(B)" + }, + { + "body": "In locations above those described in 513.3, equipment that is less than 3.0 m (10 ft) above wings and engine enclosures of aircraft and that may produce arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, receptacles, charging panels, generators, motors, or other equipment having make-and-break or sliding contacts, shall be of the totally enclosed type or constructed so as to prevent the escape of sparks or hot metal particles. Exception: Equipment in areas described in 513.3(D) shall be permitted to be of the general-purpose type. [513.7_(C)](https://2023.antflix.net#513.7_(C))", + "displayTitle": "(C) Arcing Equipment", + "children": [], + "url": "https://2023.antflix.net#513.7_(C)" + }, + { + "body": "Lampholders of metal-shell, fiber-lined types shall not be used for fixed incandescent lighting. [513.7_(D)](https://2023.antflix.net#513.7_(D))", + "displayTitle": "(D) Lampholders", + "children": [], + "url": "https://2023.antflix.net#513.7_(D)" + }, + { + "body": "Where stanchions, rostrums, or docks are not located or likely to be located in a Class I location, as defined in 513.3(C), wiring and equipment shall comply with 513.7, except that such wiring and equipment not more than 457 mm (18 in.) above the floor in any position shall comply with 513.4(B). Receptacles and attachment plugs shall be of a locking type that will not readily disconnect. [513.7_(E)](https://2023.antflix.net#513.7_(E))", + "displayTitle": "(E) Stanchions, Rostrums, or Docks", + "children": [], + "url": "https://2023.antflix.net#513.7_(E)" + }, + { + "body": "Mobile stanchions with electrical equipment complying with 513.7(E) shall carry at least one permanently affixed warning sign with the following words or equivalent:\nWARNINGKEEP 5 FT CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS\nor\nWARNINGKEEP 1.5 METERS CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS [513.7_(F)](https://2023.antflix.net#513.7_(F))", + "displayTitle": "(F) Mobile Stanchions", + "children": [], + "url": "https://2023.antflix.net#513.7_(F)" + } + ], + "url": "https://2023.antflix.net#513.7" + }, + { + "displayTitle": "513.8 Underground Wiring", + "children": [ + { + "body": "All wiring installed in or under the hangar floor shall comply with the requirements for Class I, Division 1 locations. Where such wiring is located in vaults, pits, or ducts, adequate drainage shall be provided. [513.8_(A)](https://2023.antflix.net#513.8_(A))", + "displayTitle": "(A) Wiring and Equipment Embedded, Under Slab, or Underground", + "children": [], + "url": "https://2023.antflix.net#513.8_(A)" + }, + { + "body": "Uninterrupted raceways that are embedded in a hangar floor or buried beneath the hangar floor shall be considered to be within the Class I location above the floor, regardless of the point at which the raceway descends below or rises above the floor. [513.8_(B)](https://2023.antflix.net#513.8_(B))", + "displayTitle": "(B) Uninterrupted Raceways, Embedded, Under Slab, or Underground", + "children": [], + "url": "https://2023.antflix.net#513.8_(B)" + } + ], + "url": "https://2023.antflix.net#513.8" + }, + { + "body": "Seals shall be provided in accordance with 501.15 or 505.16, as applicable. Sealing requirements specified shall apply to horizontal as well as to vertical boundaries of the defined Class I locations. [513.9](https://2023.antflix.net#513.9)", + "displayTitle": "513.9 Sealing", + "children": [], + "url": "https://2023.antflix.net#513.9" + }, + { + "displayTitle": "513.10 Special Equipment", + "children": [ + { + "displayTitle": "(A) Aircraft Electrical Systems", + "children": [ + { + "body": "Aircraft electrical systems shall be de-energized when the aircraft is stored in a hangar and, whenever possible, while the aircraft is undergoing maintenance. [513.10_(A)_(1)](https://2023.antflix.net#513.10_(A)_(1))", + "displayTitle": "(1) De-Energizing Aircraft Electrical Systems", + "children": [], + "url": "https://2023.antflix.net#513.10_(A)_(1)" + }, + { + "body": "Aircraft batteries shall not be charged where installed in an aircraft located inside or partially inside a hangar. [513.10_(A)_(2)](https://2023.antflix.net#513.10_(A)_(2))", + "displayTitle": "(2) Aircraft Batteries", + "children": [], + "url": "https://2023.antflix.net#513.10_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#513.10_(A)" + }, + { + "body": "Battery chargers and their control equipment shall not be located or operated within any of the Class I locations defined in 513.3 and shall be located in a separate building or in an area defined in 513.3(D). Mobile chargers shall carry at least one permanently affixed warning sign with the following words or equivalent:\nWARNINGKEEP 5 FT CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS\nor\nWARNINGKEEP 1.5 METERS CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS \nTables, racks, trays, and wiring shall not be located within a Class I location and shall comply with the requirements of 480.9 and 480.10. [513.10_(B)](https://2023.antflix.net#513.10_(B))", + "displayTitle": "(B) Aircraft Battery Charging and Equipment", + "children": [], + "url": "https://2023.antflix.net#513.10_(B)" + }, + { + "displayTitle": "(C) External Power Sources for Energizing Aircraft", + "children": [ + { + "body": "Aircraft energizers shall be designed and mounted such that all electrical equipment and fixed wiring will be at least 450 mm (18 in.) above floor level and shall not be operated in a Class I location as defined in 513.3(C). [513.10_(C)_(1)](https://2023.antflix.net#513.10_(C)_(1))", + "displayTitle": "(1) Not Less Than 450 mm (18 in.) Above Floor", + "children": [], + "url": "https://2023.antflix.net#513.10_(C)_(1)" + }, + { + "body": "Mobile energizers shall carry at least one permanently affixed warning sign with the following words or equivalent: WARNINGKEEP 5 FT CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS or WARNINGKEEP 1.5 METERS CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS [513.10_(C)_(2)](https://2023.antflix.net#513.10_(C)_(2))", + "displayTitle": "(2) Marking for Mobile Units", + "children": [], + "url": "https://2023.antflix.net#513.10_(C)_(2)" + }, + { + "body": "Flexible cords for aircraft energizers and ground support equipment shall be identified for the type of service and extra-hard usage and shall include an equipment grounding conductor. [513.10_(C)_(3)](https://2023.antflix.net#513.10_(C)_(3))", + "displayTitle": "(3) Cords", + "children": [], + "url": "https://2023.antflix.net#513.10_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#513.10_(C)" + }, + { + "displayTitle": "(D) Mobile Servicing Equipment With Electrical Components", + "children": [ + { + "body": "Mobile servicing equipment (such as vacuum cleaners, air compressors, air movers) having electrical wiring and equipment not suitable for Class I, Division 2 or Zone 2 locations shall be so designed and mounted that all such fixed wiring and equipment will be at least 450 mm (18 in.) above the floor. Such mobile equipment shall not be operated within the Class I location defined in 513.3(C) and shall carry at least one permanently affixed warning sign with the following words or equivalent: WARNINGKEEP 5 FT CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS or WARNINGKEEP 1.5 METERS CLEAR OF AIRCRAFT ENGINESAND FUEL TANK AREAS [513.10_(D)_(1)](https://2023.antflix.net#513.10_(D)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#513.10_(D)_(1)" + }, + { + "body": "Flexible cords for mobile equipment shall be suitable for the type of service and identified for extra-hard usage and shall include an equipment grounding conductor. Attachment plugs and receptacles shall be identified for the location in which they are installed and shall provide for connection of the equipment grounding conductor. [513.10_(D)_(2)](https://2023.antflix.net#513.10_(D)_(2))", + "displayTitle": "(2) Cords and Connectors", + "children": [], + "url": "https://2023.antflix.net#513.10_(D)_(2)" + }, + { + "body": "Equipment that is not identified as suitable for Class I, Division 2 locations shall not be operated in locations where maintenance operations likely to release flammable liquids or vapors are in progress. [513.10_(D)_(3)](https://2023.antflix.net#513.10_(D)_(3))", + "displayTitle": "(3) Restricted Use", + "children": [], + "url": "https://2023.antflix.net#513.10_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#513.10_(D)" + }, + { + "displayTitle": "(E) Portable Equipment", + "children": [ + { + "body": "Portable lighting equipment that is used within a hangar shall be identified for the location in which they are used. For portable luminaires, flexible cord suitable for the type of service and identified for extra-hard usage shall be used. Each such cord shall include a separate equipment grounding conductor. [513.10_(E)_(1)](https://2023.antflix.net#513.10_(E)_(1))", + "displayTitle": "(1) Portable Lighting Equipment", + "children": [], + "url": "https://2023.antflix.net#513.10_(E)_(1)" + }, + { + "body": "Portable utilization equipment that is or may be used within a hangar shall be of a type suitable for use in Class I, Division 2 or Zone 2 locations. For portable utilization equipment, flexible cord suitable for the type of service and approved for extra-hard usage shall be used. Each such cord shall include a separate equipment grounding conductor. [513.10_(E)_(2)](https://2023.antflix.net#513.10_(E)_(2))", + "displayTitle": "(2) Portable Utilization Equipment", + "children": [], + "url": "https://2023.antflix.net#513.10_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#513.10_(E)" + } + ], + "url": "https://2023.antflix.net#513.10" + }, + { + "body": "Ground-fault circuit-interrupter protection for personnel shall be provided as required in 210.8(B). [513.12](https://2023.antflix.net#513.12)", + "displayTitle": "513.12 Ground-Fault Circuit-Interrupter Protection for Personnel", + "children": [], + "url": "https://2023.antflix.net#513.12" + }, + { + "displayTitle": "513.16 Grounding and Bonding Requirements", + "children": [ + { + "body": "All metal raceways, the metal armor or metallic sheath on cables, and all non\u2014current-carrying metal parts of fixed or portable electrical equipment, regardless of voltage, shall be grounded. Grounding in Class I locations shall comply with 501.30 for Class I, Division 1 and 2 locations and 505.30 for Zone 0, 1, and 2 locations. [513.16_(A)](https://2023.antflix.net#513.16_(A))", + "displayTitle": "(A) General Grounding Requirements", + "children": [], + "url": "https://2023.antflix.net#513.16_(A)" + }, + { + "displayTitle": "(B) Supplying Circuits With Grounded and Equipment Grounding Conductors in Class I Locations", + "children": [ + { + "body": "Where a circuit supplies portables or pendants and includes a grounded conductor, receptacles, attachment plugs, connectors, and similar devices shall be of the grounding type, and the grounded conductor of the flexible cord shall be connected to the screw shell of any lampholder or to the grounded terminal of any utilization equipment supplied. [513.16_(B)_(1)](https://2023.antflix.net#513.16_(B)_(1))", + "displayTitle": "(1) Circuits Supplying Portable Equipment or Pendants", + "children": [], + "url": "https://2023.antflix.net#513.16_(B)_(1)" + }, + { + "body": "Approved means shall be provided for maintaining continuity of the equipment grounding conductor between the fixed wiring system and the non\u2014current-carrying metal portions of pendant luminaires, portable luminaires, and portable utilization equipment. [513.16_(B)_(2)](https://2023.antflix.net#513.16_(B)_(2))", + "displayTitle": "(2) Approved Means", + "children": [], + "url": "https://2023.antflix.net#513.16_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#513.16_(B)" + } + ], + "url": "https://2023.antflix.net#513.16" + } + ], + "url": "https://2023.antflix.net#513" + }, + { + "displayTitle": "Article 514 Motor Fuel Dispensing Facilities", + "children": [ + { + "body": "This article shall apply to motor fuel dispensing facilities, marine/motor fuel dispensing facilities, motor fuel dispensing facilities located inside buildings, and fleet vehicle motor fuel dispensing facilities. Informational Note: See NFPA 30A-2021, Code for Motor Fuel Dispensing Facilities and Repair Garages, for information regarding safeguards for motor fuel dispensing facilities and for extracted text that is followed by a reference in brackets. Only editorial changes were made to the extracted text to make it consistent with this Code. [514.1](https://2023.antflix.net#514.1)", + "displayTitle": "514.1 Scope", + "children": [], + "url": "https://2023.antflix.net#514.1" + }, + { + "body": "In addition to the requirements of this article, motor fuel dispensing facilities shall comply with Table 514.2, as applicable, except as modified by this article. Table 514.2 Other Articles Requirement Division ClassifiedLocations Zone Classified Locations Area classification 500.5, 500.6 505.5, 505.6, 505.7 Equipment Part III of 501, 500.7, 505.8, 505.9, 505.20, 500.8, 501.5 505.22 Wiring Part II of 501 505.15, 505.16, 505.17, 505.18, 505.19, 505.26, 505.30 [514.2](https://2023.antflix.net#514.2)", + "displayTitle": "514.2 Other Articles", + "children": [], + "url": "https://2023.antflix.net#514.2" + }, + { + "body": "Where the term \"Class I\" is used with respect to Zone classifications within this article of the Code, it shall apply to Zone 0, Zone 1, and Zone 2 designations. Informational Note: The term \"Class I\" was originally included as a prefix to Zone 0, Zone 1, and Zone 2 locations and references as an identifier for flammable gases, vapors, or liquids to differentiate from Class II and Class III locations. Zone 0, Zone 1, and Zone 2 only apply to flammable gases, vapors, or liquids so the \"Class I\" prefix is redundant and has been deleted, except for text that is extracted from other documents or to remain consistent throughout this article. [See Figure 514.3.] [514.3](https://2023.antflix.net#514.3)", + "displayTitle": "514.3 Classification of Locations", + "children": [ + { + "body": "Where the authority having jurisdiction can satisfactorily determine that flammable liquids having a flash point below 38\u00b0C (100\u00b0F), such as gasoline, will not be handled, such location shall not be required to be classified. [514.3_(A)](https://2023.antflix.net#514.3_(A))", + "displayTitle": "(A) Unclassified Locations", + "children": [], + "url": "https://2023.antflix.net#514.3_(A)" + }, + { + "body": "[See Figure 514.3(B).] [514.3_(B)](https://2023.antflix.net#514.3_(B))", + "displayTitle": "(B) Classified Locations", + "children": [ + { + "body": "Table 514.3(B)(1) shall be applied where Class I liquids are stored, handled, or dispensed and shall be used to delineate and classify motor fuel dispensing facilities and commercial garages as defined in Article 100. Table 515.3 shall be used for the purpose of delineating and classifying aboveground tanks. A Class I location shall not extend beyond an unpierced wall, roof, or other solid partition. [30A:8.1, 8.2, 8.3] [514.3_(B)_(1)](https://2023.antflix.net#514.3_(B)_(1))", + "displayTitle": "(1) Class I Locations", + "children": [], + "url": "https://2023.antflix.net#514.3_(B)_(1)" + }, + { + "body": "Table 514.3(B)(2) shall be used to delineate and classify areas where CNG, LNG, compressed or liquefied hydrogen, LP-Gas, or combinations of these, are dispensed as motor vehicle fuels along with Class I or Class II liquids that are also dispensed as motor vehicle fuels. [30A:12.1] Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. [30A:12.4] Dispensing devices for LP-Gas shall be located as follows:At least 3 m (10 ft) from any dispensing device for Class I liquidsAt least 1.5 m (5 ft) from any dispensing device for Class I liquids where the following conditions exist:The LP-Gas deliver nozzle and filler valve release no more than 4 cm3 (0.1 oz) of liquid upon disconnection.The fixed maximum liquid level gauge remains closed during the entire refueling process.[30A:12.5.2]Informational Note No. 1: See NFPA 58, Liquefied Petroleum Gas Code, for requirements on dispensing devices for LP-Gas.Informational Note No. 2: See NFPA 58, Liquefied Petroleum Gas Code, and NFPA 59, Utility LP-Gas Plant Code, for information on classified areas pertaining to LP-Gas systems other than residential or commercial.Informational Note No. 3: See 514.3(C) for motor fuel dispensing stations in marinas and boatyards. [514.3_(B)_(2)](https://2023.antflix.net#514.3_(B)_(2))", + "displayTitle": "(2) Compressed Natural Gas, Liquefied Natural Gas, and Liquefied Petroleum Gas Areas", + "children": [], + "url": "https://2023.antflix.net#514.3_(B)_(2)" + }, + { + "body": "Aboveground tanks storing CNG or LNG shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.1]Informational Note: See NFPA 52, Vehicular Natural Gas Fuel Systems Code, Section 8.4, for the relevant distances for CNG and LNG.Aboveground tanks storing hydrogen shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.2]Informational Note: See NFPA 2, Hydrogen Technologies Code, for the relevant distances for hydrogen.Aboveground tanks storing LP-Gas shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.3]Informational Note: See NFPA 58, Liquefied Petroleum Gas Code, Section 6.3, for the relevant distances for LP-Gas.Aboveground tanks storing CNG, LNG, or LP-Gas shall be separated from each other by at least 6 m (20 ft) and from dispensing devices that dispense liquid or gaseous motor vehicle fuels by at least 6 m (20 ft). [30A:12.3.3]Exception No. 1: The required separation shall not apply to tanks or dispensers storing or handling fuels of the same chemical composition.Exception No. 2: The required separation shall not apply when both the gaseous fuel storage and dispensing equipment are at least 15 m (50 ft) from any other aboveground motor fuel storage or dispensing equipment.Informational Note: See NFPA 52, Vehicular Natural Gas Fuel Systems Code, or NFPA 58, Liquefied Petroleum Gas Code, for additional information.Dispenser Installations Beneath Canopies. Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. [30A:12.4]Specific Requirements for LP-Gas Dispensing Devices. [30A:12.5] Dispensing devices for LP-Gas shall be located as follows:At least 3 m (10 ft) from any dispensing device for Class I liquidsAt least 1.5 m (5 ft) from any dispensing device for Class I liquids where the following conditions exist:The LP-Gas deliver nozzle and filler valve release no more than 4 cm3 (0.1 oz) of liquid upon disconnection.The fixed maximum liquid level gauge remains closed during the entire refueling process. [30A:12.5.2]Table 514.3(B)(2) shall be used to delineate and classify areas for the purpose of installation of electrical wiring and electrical utilization equipment. [514.3_(B)_(3)](https://2023.antflix.net#514.3_(B)_(3))", + "displayTitle": "(3) Fuel Storage", + "children": [], + "url": "https://2023.antflix.net#514.3_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#514.3_(B)" + }, + { + "body": "Informational Note: See NFPA 303, Fire Protection Standard for Marinas and Boatyards, and NFPA 30A, Code for Motor Fuel Dispensing Facilities and Repair Garages, for additional information. [514.3_(C)](https://2023.antflix.net#514.3_(C))", + "displayTitle": "(C) Motor Fuel Dispensing Stations in Boatyards and Marinas", + "children": [ + { + "body": "Electrical wiring and equipment located at or serving motor fuel dispensing locations shall be installed on the side of the wharf, pier, or dock opposite from the liquid piping system. [514.3_(C)_(1)](https://2023.antflix.net#514.3_(C)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#514.3_(C)_(1)" + }, + { + "body": "The criteria provided in 514.3(C)(2)(a) and (C)(2)(b) shall be used for the purposes of applying Table 514.3(B)(1) and Table 514.3(B)(2) to motor fuel dispensing equipment on floating or fixed piers, wharfs, or docks. Closed Construction. Where the construction of floating docks, piers, or wharfs is closed so that there is no space between the bottom of the dock, pier, or wharf and the water, as in the case of concrete-enclosed expanded foam or similar construction, and the construction includes integral service boxes with supply chases, the following shall apply:The space above the surface of the floating dock, pier, or wharf shall be a Class I, Division 2 location with distances in accordance with Table 514.3(B)(1) for dispenser and outdoor locations.Spaces below the surface of the floating dock, pier, or wharf that have areas or enclosures, such as tubs, voids, pits, vaults, boxes, depressions, fuel piping chases, or similar spaces, where flammable liquid or vapor can accumulate shall be a Class I, Division 1 location.Exception No. 1: Dock, pier, or wharf sections that do not support fuel dispensers and abut, but are located 6.0 m (20 ft) or more from, dock sections that support a fuel dispenser(s) shall be permitted to be Class I, Division 2 locations where documented air space is provided between dock sections to allow flammable liquids or vapors to dissipate without traveling to such dock sections. The documentation shall comply with the requirements of 500.4.Exception No. 2: Dock, pier, or wharf sections that do not support fuel dispensers and do not directly abut sections that support fuel dispensers shall be permitted to be unclassified where documented air space is provided and where flammable liquids or vapors cannot travel to such dock sections. The documentation shall comply with the requirements of 500.4.Open Construction. Where the construction of piers, wharfs, or docks is open, as in the case of decks built on stringers supported by pilings, floats, pontoons, or similar construction, the following shall apply:The area 450 mm (18 in.) above the surface of the dock, pier, or wharf and extending 6.0 m (20 ft) horizontally in all directions from the outside edge of the dispenser and down to the water level shall be a Class I, Division 2 location.Enclosures such as tubs, voids, pits, vaults, boxes, depressions, piping chases, or similar spaces where flammable liquids or vapors can accumulate within 6.0 m (20 ft) of the dispenser shall be a Class I, Division 1 location.FIGURE 514.3 Classified Areas Adjacent to Dispensers. [30A: Figure 8.3.3(a)]FIGURE 514.3(B) Classified Areas Adjacent to Dispenser Mounted on Aboveground Storage Tank. [30A: Figure 8.3.3(b)]Table 514.3(B)(1) Class I Locations - Motor Fuel Dispensing Facilities Location Division (Group D) Zone (Group IIA) Extent of Classified Location1 Dispensing Device (except Overhead Type)2, 3 Under dispenser containment 1 1 Entire space within and under dispenser pit or containment Dispenser 2 2 Within 450 mm (18 in.) of dispenser enclosure or that portion of dispenser enclosure containing liquid-handling components, extending horizontally in all directions and down to grade level Outdoor 2 2 Up to 450 mm (18 in.) above grade level, extending 6 m (20 ft) horizontally in all directions from dispenser enclosure Indoor - with mechanical ventilation 2 2 Up to 450 mm (18 in.) above floor level, extending 6 m (20 ft) horizontally in all directions from dispenser enclosure - with gravity ventilation 2 2 Up to 450 mm (18 in.) above floor level, extending 7.5 m (25 ft) horizontally in all directions from dispenser enclosure Dispensing Device - Overhead Type4 1 1 Space within dispenser enclosure and all electrical equipment integral with dispensing hose or nozzle 2 2 Within 450 mm (18 in.) of dispenser enclosure, extending horizontally in all directions and down to grade level 2 2 Up to 450 mm (18 in.) above grade level, extending 6 m (20 ft) horizontally in all directions from a point vertically below edge of dispenser enclosure Remote Pump - Outdoor 1 1 Entire space within any pit or box below grade level, any part of which is within 3 m (10 ft) horizontally from any edge of pump 2 2 Within 900 mm (3 ft) of any edge of pump, extending horizontally in all directions 2 2 Up to 450 mm (18 in.) above grade level, extending 3 m (10 ft) horizontally in all directions from any edge of pump Indoor 1 1 Entire space within any pit 2 2 Within 1.5 m (5 ft) of any edge of pump, extending in all directions 9 2 Up to 900 mm (3 ft) above floor level, extending 7.5 m (25 ft) horizontally in all directions from any edge of pump Sales, Storage, Rest Rooms including structures (such as the attendant's kiosk) on or adjacent to dispensers unclassified unclassified Except as noted below 1 1 Entire volume, if there is any opening to room within the extent of a Division 1 or Zone 1 location 2 2 Entire volume, if there is any opening to room within the extent of a Division 2 or Zone 2 location Tank, Aboveground Inside tank 1 0 Entire inside volume Shell, ends, roof, dike area 1 1 Entire space within dike, where dike height exceeds distance from tank shell to inside of dike wall for more than 50 percent of tank circumference 2 2 Entire space within dike, where dike height does not exceed distance from tank shell to inside of dike wall for more than 50 percent of tank circumference Vent 2 2 Within 3 m (10 ft) of shell, ends, or roof of tank 1 1 Within 1.5 m (5 ft) of open end of vent, extending in all directions 2 2 Between 1.5 m and 3 m (5 ft and 10 ft) from open end of vent, extending in all directions Tank, Underground Inside tank 1 0 Entire inside volume Fill Opening 1 1 Entire space within any pit or box below grade level, any part of which is within a Division 1 or Division 2 classified location or within a Zone 1 or Zone 2 classified location 2 2 Up to 450 mm (18 in.) above grade level, extending 1.5 m (5 ft) horizontally in all directions from any tight-fill connection and extending 3 m (10 ft) horizontally in all directions from any loose-fill connection Vent 1 1 Within 1.5 m (5 ft) of open end of vent, extending in all directions 2 2 Between 1.5 m and 3 m (5 ft and 10 ft) from open end of vent, extending in all directions Vapor Processing System Pits 1 1 Entire space within any pit or box below grade level, any part of which: (1) is within a Division 1 or Division 2 classified location; (2) is within a Zone 1 or Zone 2 classified location: (3) houses any equipment used to transfer or process vapors Equipment in protective enclosures 2 2 Entire space within enclosure Equipment not within protective enclosure 2 2 Within 450 mm (18 in.) of equipment containing flammable vapors or liquid, extending horizontally in all directions and down to grade level 2 2 Up to 450 mm (18 in.) above grade level within 3 m (10 ft) horizontally of the vapor processing equipment - Equipment enclosure 1 1 Entire space within enclosure, if flammable vapor or liquid is present under normal operating conditions 2 2 Entire space within enclosure, if flammable vapor or liquid is not present under normal operating conditions - Vacuum assist blower 2 2 Within 450 mm (18 in.) of blower, extending horizontally in all directions and down to grade level 2 2 Up to 450 mm (18 in.) above grade level, extending 3 m (10 ft) horizontally in all directions Vault 1 1 Entire interior space, if Class I liquids are stored within 1For marine application, grade level means the surface of a pier, extending down to water level.2Refer to Figure 514.3 and Figure 514.3(B) for an illustration of classified location around dispensing devices.3Area classification inside the dispenser enclosure is covered in UL 87, Standard for Power-Operated Dispensing Devices for Petroleum Products.4Ceiling-mounted hose reel. [30A:Table 8.3.1]Table 514.3(B)(2) Electrical Equipment Classified Areas for Dispensing Devices Dispensing Device Extent of Classified Area Class I, Division 1 Class I, Division 2 Compressed natural gas (CNG) Entire space within the dispenser enclosure 1.5 m (5 ft) in all directions from dispenser enclosure Liquefied natural gas (LNG) Entire space within the dispenser enclosure 3 m (10 ft) in all directions from the dispenser enclosure Liquefied petroleum gas (LP-Gas) Entire space within the dispenser enclosure; 450 mm (18 in.) from the exterior surface of the dispenser enclosure to an elevation of 1.22 m (4 ft) above the base of the dispenser; the entire pit or open space beneath the dispenser and within 6 m (20 ft) horizontally from any edge of the dispenser when the pit or trench is not mechanically ventilated Up to 450 mm (18 in.) above ground and within 6 m (20 ft) horizontally from any edge of the dispenser enclosure, including pits or trenches within this area when provided with adequate mechanical ventilation [30A:Table 12.6.2] [514.3_(C)_(2)](https://2023.antflix.net#514.3_(C)_(2))", + "displayTitle": "(2) Classification of Class I, Division 1 and 2 Areas", + "children": [], + "url": "https://2023.antflix.net#514.3_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#514.3_(C)" + } + ], + "url": "https://2023.antflix.net#514.3" + }, + { + "body": "All electrical equipment and wiring installed in the hazardous (classified) locations specified in 514.3 shall comply with Parts II and III of Article 501. Conductor insulation in these locations shall comply with 501.20. [514.4](https://2023.antflix.net#514.4)", + "displayTitle": "514.4 Wiring and Equipment Installed in Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#514.4" + }, + { + "body": "Fixed wiring and equipment above hazardous (classified) locations shall be installed in accordance with 514.3 and shall be one or more of the following: Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with listed threaded or threadless fittings, or electrical metallic tubing (EMT) with listed fittings.Rigid polyvinyl chloride conduit (PVC), reinforced thermosetting resin conduit (RTRC), or electrical nonmetallic tubing (ENT).Flexible metal conduit (FMC), liquidtight flexible metal conduit (LFMC), or liquidtight flexible nonmetallic conduit (LFNC), with listed fittings.Type MC cable, Type AC cable, Type TC cable, or Type TC-ER cable, including installation in cable trays, with listed fittings. Type TC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Type MI cable terminated with listed fittings and supported to avoid tensile stress.Manufactured wiring systems.Type PLTC cable or Type PLTC-ER cable used in Class 2 or Class 3 circuits. Type PLTC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Type ITC cable or ITC-ER cable in accordance with 335.4 and 335.5 and terminated with listed fittings. Type ITC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Cellular metal floor raceways or cellular concrete floor raceways only for supplying ceiling outlets or extensions to the area below the floor. Such raceways shall have no connections leading into or through any Class I location above the floor. [514.7](https://2023.antflix.net#514.7)", + "displayTitle": "514.7 Wiring and Equipment Above Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#514.7" + }, + { + "body": "All underground wiring shall comply with 514.8(A), (B), or (C). [514.8](https://2023.antflix.net#514.8)", + "displayTitle": "514.8 Underground Wiring", + "children": [ + { + "body": "Threaded rigid metal conduit (RMC) or threaded intermediate metal conduit (IMC) with listed threaded fittings shall be permitted. Any portion of electrical wiring that is below the surface of a Class I, Division 1 or Division 2 location [as classified in Table 514.3(B)(1) and Table 514.3(B)(2)] shall be sealed within 3.05 m (10 ft) of the point of emergence above grade. The conduit shall not contain any unions, couplings, boxes, or fittings between the conduit seal and the point of emergence above grade. [514.8_(A)](https://2023.antflix.net#514.8_(A))", + "displayTitle": "(A) Metal Conduit", + "children": [], + "url": "https://2023.antflix.net#514.8_(A)" + }, + { + "body": "Type MI cable shall be permitted where it is installed in accordance with Part II of Article 332. [514.8_(B)](https://2023.antflix.net#514.8_(B))", + "displayTitle": "(B) Type MI Cable", + "children": [], + "url": "https://2023.antflix.net#514.8_(B)" + }, + { + "body": "Rigid polyvinyl chloride conduit (PVC), reinforced thermosetting resin conduit (RTRC), or high-density polyethylene conduit (HDPE) shall be permitted where buried under not less than 600 mm (2 ft) of cover. Where PVC conduit, RTRC conduit, or HDPE conduit is used, threaded rigid metal conduit (RMC) or threaded intermediate metal conduit (IMC) shall be used for the last 600 mm (2 ft) of the underground run to emergence or to the point of connection to the aboveground raceway. An equipment grounding conductor (EGC) shall be included to provide electrical continuity of the raceway system and for grounding of noncurrent-carrying metal parts. [514.8_(C)](https://2023.antflix.net#514.8_(C))", + "displayTitle": "(C) Nonmetallic Conduit", + "children": [], + "url": "https://2023.antflix.net#514.8_(C)" + } + ], + "url": "https://2023.antflix.net#514.8" + }, + { + "displayTitle": "514.9 Sealing", + "children": [ + { + "body": "A listed seal shall be provided in each conduit run entering or leaving a dispenser or any cavities or enclosures in direct communication therewith. The sealing fitting or listed explosionproof reducer at the seal shall be the first fitting after the conduit emerges from the earth or concrete. [514.9_(A)](https://2023.antflix.net#514.9_(A))", + "displayTitle": "(A) At Dispenser", + "children": [], + "url": "https://2023.antflix.net#514.9_(A)" + }, + { + "body": "Additional seals shall be provided in accordance with 501.15. Sections 501.15(A)(4) and (B)(2) shall apply to horizontal as well as to vertical boundaries of the defined Class I locations. [514.9_(B)](https://2023.antflix.net#514.9_(B))", + "displayTitle": "(B) At Boundary", + "children": [], + "url": "https://2023.antflix.net#514.9_(B)" + } + ], + "url": "https://2023.antflix.net#514.9" + }, + { + "displayTitle": "514.11 Circuit Disconnects", + "children": [ + { + "body": "Fuel dispensing systems shall be provided with one or more clearly identified emergency shutoff devices or electrical disconnects. Such devices or disconnects shall be installed in approved locations but not less than 6 m (20 ft) or more than 30 m (100 ft) from the fuel dispensing devices that they serve. Emergency shutoff devices or electrical disconnects shall disconnect power to all dispensing devices; to all remote pumps serving the dispensing devices; to all associated power, control, and signal circuits; and to all other electrical equipment in the hazardous (classified) locations surrounding the fuel dispensing devices. When more than one emergency shutoff device or electrical disconnect is provided, all devices shall be interconnected. Resetting from an emergency shutoff condition shall require manual intervention and the manner of resetting shall be approved by the authority having jurisdiction. [30A:6.7] The emergency shutoff device shall disconnect simultaneously from the source of supply, all conductors of the circuits, including the grounded conductor, if any. Equipment grounding conductors shall remain connected. Exception: Intrinsically safe systems shall not be required to meet this requirement. [514.11_(A)](https://2023.antflix.net#514.11_(A))", + "displayTitle": "(A) Emergency Electrical Disconnects", + "children": [], + "url": "https://2023.antflix.net#514.11_(A)" + }, + { + "body": "At attended motor fuel dispensing facilities, the devices or disconnects shall be readily accessible to the attendant. [30A:6.7.1] [514.11_(B)](https://2023.antflix.net#514.11_(B))", + "displayTitle": "(B) Attended Self-Service Motor Fuel Dispensing Facilities", + "children": [], + "url": "https://2023.antflix.net#514.11_(B)" + }, + { + "body": "At unattended motor fuel dispensing facilities, the devices or disconnects shall be readily accessible to patrons and at least one additional device or disconnect shall be readily accessible to each group of dispensing devices on an individual island. [30A:6.7.2] [514.11_(C)](https://2023.antflix.net#514.11_(C))", + "displayTitle": "(C) Unattended Self-Service Motor Fuel Dispensing Facilities", + "children": [], + "url": "https://2023.antflix.net#514.11_(C)" + } + ], + "url": "https://2023.antflix.net#514.11" + }, + { + "body": "Each dispensing device shall be provided with a means to remove all external voltage sources, including power, communications, data, and video circuits and including feedback, during periods of maintenance and service of the dispensing equipment. The location of this means shall be permitted to be other than inside or adjacent to the dispensing device. The means shall be capable of being locked in the open position in accordance with 110.25. [514.13](https://2023.antflix.net#514.13)", + "displayTitle": "514.13 Provisions for Maintenance and Service of Dispensing Equipment", + "children": [], + "url": "https://2023.antflix.net#514.13" + }, + { + "body": "All metal raceways, the metal armor or metallic sheath on cables, and all non\u2014current-carrying metal parts of fixed and portable electrical equipment, regardless of voltage, shall be grounded and bonded. Grounding and bonding in Class I locations shall comply with 501.30. [514.16](https://2023.antflix.net#514.16)", + "displayTitle": "514.16 Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#514.16" + } + ], + "url": "https://2023.antflix.net#514" + }, + { + "displayTitle": "Article 515 Bulk Storage Plants", + "children": [ + { + "body": "This article covers a property or portion of a property where flammable liquids are received by tank vessel, pipelines, tank car, or tank vehicle and are stored or blended in bulk for the purpose of distributing such liquids by tank vessel, pipeline, tank car, tank vehicle, portable tank, or container. Informational Note: See NFPA 30-2021, Flammable and Combustible Liquids Code, for extracted text that is followed by a reference in brackets. Only editorial changes were made to the extracted text to make it consistent with this Code. [515.1](https://2023.antflix.net#515.1)", + "displayTitle": "515.1 Scope", + "children": [], + "url": "https://2023.antflix.net#515.1" + }, + { + "body": "In addition to the requirements of this article, bulk storage plants shall comply with Table 515.2, as applicable, except as modified by this article. Table 515.2 Other Articles Requirement Division ClassifiedLocations Zone ClassifiedLocations Area classification 500.5, 500.6 505.5, 505.6, 505.7 Equipment Part III of 501, 500.7, 500.8, 501.5 505.8, 505.9, 505.20, 505.22 Wiring Part II of 501 505.15, 505.16, 505.17, 505.18, 505.19, 505.26, 505.30 [515.2](https://2023.antflix.net#515.2)", + "displayTitle": "515.2 Other Articles", + "children": [], + "url": "https://2023.antflix.net#515.2" + }, + { + "body": "Where the term \"Class I\" is used with respect to Zone classifications within this article of the Code, it shall apply to Zone 0, Zone 1, and Zone 2 designations. Informational Note No. 1: The term \"Class I\" was originally included as a prefix to Zone 0, Zone 1, and Zone 2 locations and references as an identifier for flammable gases, vapors, or liquids to differentiate from Class II and Class III locations. Zone 0, Zone 1, and Zone 2 only apply to flammable gases, vapors, or liquids so the \"Class I\" prefix is redundant and has been deleted, except for text that is extracted from other documents or to remain consistent throughout this article. Table 515.3 shall be applied where Class I flammable liquids are stored, handled, or dispensed and shall be used to delineate and classify bulk storage plants. The classified location shall not extend beyond a floor, wall, roof, or other solid partition that has no communicating openings. Where the installation does not meet the requirements found in Table 515.3, the authority having jurisdiction shall have the authority to classify the extent of the classified space. Informational Note No. 2: See NFPA 30, Flammable and Combustible Liquids Code, Chapter 5, for the area classifications listed in Table 515.3 that are based on the premise that the installation meets all the applicable requirements. Informational Note No. 3: See 514.3(C) through (E) for gasoline dispensing stations in marinas and boatyards. Informational Note No. 4: See NFPA 30, Flammable and Combustible Liquids Code, Section 7.3, for additional information. FIGURE 515.3 Area Classification for a Marine Terminal Handling Flammable Liquids. [30: Figure 29.3.22] Table 515.3 Electrical Area Classifications Location Division Zone Extent of Classified Area Indoor equipment installed where flammable vapor\u2014air mixtures can exist under normal operation (see Informational Note) 1 0 The entire area associated with such equipment where flammable gases or vapors are present continuously or for long periods of time 1 1 Area within 1.5 m (5 ft) of any edge of such equipment, extending in all directions 2 2 Area between 1.5 m and 2.5 m (5 ft and 8 ft) of any edge of such equipment, extending in all directions; also, space up to 900 mm (3 ft) above floor or grade level within 1.5 m to 7.5 m (5 ft to 25 ft) horizontally from any edge of such equipment1 Outdoor equipment installed where flammable vapor\u2014air mixtures can exist under normal operation 1 0 The entire area associated with such equipment where flammable gases or vapors are present continuously or for long periods of time 1 1 Area within 900 mm (3 ft) of any edge of such equipment, extending in all directions 2 2 Area between 900 mm (3 ft) and 2.5 m (8 ft) of any edge of such equipment, extending in all directions; also, space up to 900 mm (3 ft) above floor or grade level within 900 mm to 3.0 m (3 ft to 10 ft) horizontally from any edge of such equipment Tank storage installations inside buildings 1 1 All equipment located below grade level 2 2 Any equipment located at or above grade level Tank - aboveground, fixed roof 1 0 Inside fixed roof tank 1 1 Area inside dike where dike height is greater than the distance from the tank to the dike for more than 50 percent of the tank circumference 2 2 Within 3.0 m (10 ft) from shell, ends, or roof of tank; also, area inside dike to level of top of dike wall 1 0 Area inside of vent piping or opening 1 1 Within 1.5 m (5 ft) of open end of vent, extending in all directions 2 2 Area between 1.5 m and 3.0 m (5 ft and 10 ft) from open end of vent, extending in all directions Tank - aboveground, floating roof With fixed outer roof 1 0 Area between the floating and fixed roof sections and within the shell With no fixed outer roof 1 1 Area above the floating roof and within the shell Tank vault - interior 1 1 Entire interior volume, if Class I liquids are stored within Underground tank fill opening 1 1 Any pit, box, or space below grade level, if any part is within a Division 1 or 2, or Zone 1 or 2 classified location 2 2 Up to 450 mm (18 in.) above grade level within a horizontal radius of 3.0 m (10 ft) from a loose fill connection, and within a horizontal radius of 1.5 m (5 ft) from a tight fill connection Vent - discharging upward 1 0 Area inside of vent piping or opening 1 1 Within 900 mm (3 ft) of open end of vent, extending in all directions 2 2 Area between 900 mm and 1.5 m (3 ft and 5 ft) of open end of vent, extending in all directions Drum and container filling - outdoors or indoors 1 0 Area inside the drum or container 1 1 Within 900 mm (3 ft) of vent and fill openings, extending in all directions 2 2 Area between 900 mm and 1.5 m (3 ft and 5 ft) from vent or fill opening, extending in all directions; also, up to 450 mm (18 in.) above floor or grade level within a horizontal radius of 3.0 m (10 ft) from vent or fill opening Pumps, bleeders, withdrawal fittings Indoor 2 2 Within 1.5 m (5 ft) of any edge of such devices, extending in all directions; also, up to 900 mm (3 ft) above floor or grade level within 7.5 m (25 ft) horizontally from any edge of such devices Outdoor 2 2 Within 900 mm (3 ft) of any edge of such devices, extending in all directions. Also, up to 450 mm (18 in.) above grade level within 3.0 m (10 ft) horizontally from any edge of such devices Pits and sumps Without mechanical ventilation 1 1 Entire area within a pit or sump if any part is within a Division 1 or 2 or Zone 1 or 2 classified location With adequate mechanical ventilation 2 2 Entire area within a pit or sump if any part is within a Division 1 or 2 or Zone 1 or 2 classified location Containing valves, fittings, or piping, and not within a Division 1 or 2 or Zone 1 or 2 classified location 2 2 Entire pit or sump Drainage ditches, separators, impounding basins Outdoor 2 2 Area up to 450 mm (18 in.) above ditch, separator, or basin; also, area up to 450 mm (18 in.) above grade within 4.5 m (15 ft) horizontally from any edge Indoor Same as pits and sumps Tank vehicle and tank car2 Loading through open dome 1 0 Area inside of the tank 1 1 Within 900 mm (3 ft) of edge of dome, extending in all directions 2 2 Area between 900 mm and 4.5 m (3 ft and 15 ft) from edge of dome, extending in all directions Loading through bottom connections with atmospheric venting 1 0 Area inside of the tank 1 1 Within 900 mm (3 ft) of point of venting to atmosphere, extending in all directions 2 2 Area between 900 mm and 4.5 m (3 ft and 15 ft) from point of venting to atmosphere, extending in all directions; also, up to 450 mm (18 in.) above grade within a horizontal radius of 3.0 m (10 ft) from point of loading connection Loading through closed dome with atmospheric venting 1 1 Within 900 mm (3 ft) of open end of vent, extending in all directions 2 2 Area between 900 mm and 4.5 m (3 ft and 15 ft) from open end of vent, extending in all directions; also, within 900 mm (3 ft) of edge of dome, extending in all directions Loading through closed dome with vapor control 2 2 Within 900 mm (3 ft) of point of connection of both fill and vapor lines extending in all directions Bottom loading with vapor control or any bottom unloading 2 2 Within 900 mm (3 ft) of point of connections, extending in all directions; also up to 450 mm (18 in.) above grade within a horizontal radius of 3.0 m (10 ft) from point of connections Storage and repair garage for tank vehicles 1 1 All pits or spaces below floor level 2 2 Area up to 450 mm (18 in.) above floor or grade level for entire storage or repair garage Garages for other than tank vehicles Unclassified If there is any opening to these rooms within the extent of an outdoor classified location, the entire room shall be classified the same as the area classification at the point of the opening. Outdoor drum storage Unclassified Inside rooms or storage lockers used for the storage of Class I liquids 2 2 Entire room or locker Indoor warehousing where there is no flammable liquid transfer Unclassified If there is any opening to these rooms within the extent of an indoor classified location, the classified location shall extend through the opening to the same extent as if the wall, curb, or partition did not exist. Office and rest rooms Unclassified If there is any opening to these rooms within the extent of an indoor classified location, the room shall be classified the same as if the wall, curb, or partition did not exist. Piers and wharves See Figure 515.3. 1The release of Class I liquids can generate vapors to the extent that the entire building, and possibly an area surrounding it, should be considered a Class I, Division 2 or Zone 2 location. 2When classifying extent of area, consideration shall be given to the fact that tank cars or tank vehicles can be spotted at varying points. Therefore, the extremities of the loading or unloading positions shall be used. [30:Table 7.3.3] [515.3](https://2023.antflix.net#515.3)", + "displayTitle": "515.3 Classified Locations", + "children": [], + "url": "https://2023.antflix.net#515.3" + }, + { + "body": "All electrical wiring and equipment within the hazardous (classified) locations specified in 515.3 shall comply with the applicable requirements of Table 515.2. [515.4](https://2023.antflix.net#515.4)", + "displayTitle": "515.4 Wiring and Equipment Located in Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#515.4" + }, + { + "displayTitle": "515.7 Wiring and Equipment Above Hazardous (Classified) Locations", + "children": [ + { + "body": "All fixed wiring above hazardous (classified) locations shall comply with 501.10(B) or 505.15(C), as applicable. [515.7_(A)](https://2023.antflix.net#515.7_(A))", + "displayTitle": "(A) Fixed Wiring", + "children": [], + "url": "https://2023.antflix.net#515.7_(A)" + }, + { + "body": "Fixed equipment that might produce arcs, sparks, or particles of hot metal, such as lamps and lamp-holders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make-and-break or sliding contacts, shall be of the totally enclosed type or be constructed to prevent the escape of sparks or hot metal particles. [515.7_(B)](https://2023.antflix.net#515.7_(B))", + "displayTitle": "(B) Fixed Equipment", + "children": [], + "url": "https://2023.antflix.net#515.7_(B)" + }, + { + "body": "Portable luminaires or other utilization equipment and their flexible cords shall comply with Part III of Article 501 or 505.17 for the class of location above which they are connected or used. [515.7_(C)](https://2023.antflix.net#515.7_(C))", + "displayTitle": "(C) Portable Luminaires or Other Utilization Equipment", + "children": [], + "url": "https://2023.antflix.net#515.7_(C)" + } + ], + "url": "https://2023.antflix.net#515.7" + }, + { + "displayTitle": "515.8 Underground Wiring", + "children": [ + { + "body": "Underground wiring shall be installed in threaded rigid metal conduit or threaded steel intermediate metal conduit or, where buried under not less than 600 mm (2 ft) of cover, shall be permitted in PVC conduit, RTRC conduit, or a listed cable. Where PVC conduit or RTRC conduit is used, threaded rigid metal conduit or threaded steel intermediate metal conduit shall be used for not less than the last 600 mm (2 ft) of the conduit run to the conduit point of emergence from the underground location or to the point of connection to an aboveground raceway. Where cable is used, it shall be enclosed in threaded rigid metal conduit or threaded steel intermediate metal conduit from the point of lowest buried cable level to the point of connection to the above-ground raceway. [515.8_(A)](https://2023.antflix.net#515.8_(A))", + "displayTitle": "(A) Wiring Method", + "children": [], + "url": "https://2023.antflix.net#515.8_(A)" + }, + { + "body": "Conductor insulation shall comply with 501.20. [515.8_(B)](https://2023.antflix.net#515.8_(B))", + "displayTitle": "(B) Insulation", + "children": [], + "url": "https://2023.antflix.net#515.8_(B)" + }, + { + "body": "Where PVC conduit, RTRC conduit, or cable with a nonmetallic sheath is used, an equipment grounding conductor shall be included to provide for electrical continuity of the raceway system and for grounding of noncurrent-carrying metal parts. [515.8_(C)](https://2023.antflix.net#515.8_(C))", + "displayTitle": "(C) Nonmetallic Wiring", + "children": [], + "url": "https://2023.antflix.net#515.8_(C)" + } + ], + "url": "https://2023.antflix.net#515.8" + }, + { + "body": "Sealing requirements shall apply to horizontal as well as to vertical boundaries of the defined Class I locations. Buried raceways and cables under defined Class I locations shall be considered to be within a Class I, Division 1 or Zone 1 location. [515.9](https://2023.antflix.net#515.9)", + "displayTitle": "515.9 Sealing", + "children": [], + "url": "https://2023.antflix.net#515.9" + }, + { + "body": "In addition to the requirements of this article, dispensers for gasoline or other volatile flammable liquids or liquified flammable gases shall comply with the requirements for motor fuel dispensing facilities, as applicable, except as modified by this article. [515.10](https://2023.antflix.net#515.10)", + "displayTitle": "515.10 Special Equipment - Motor Fuel Dispensers", + "children": [], + "url": "https://2023.antflix.net#515.10" + }, + { + "body": "All metal raceways, the metal armor or metallic sheath on cables, and all non\u2014current-carrying metal parts of fixed or portable electrical equipment, regardless of voltage, shall be grounded and bonded. Grounding and bonding in Class I locations shall comply with 501.30 for Class I, Division 1 and 2 locations and 505.30 for Zone 0, 1, and 2 locations. Informational Note: See NFPA 30, Flammable and Combustible Liquids Code, 6.5.4, for information on grounding for static protection. [515.16](https://2023.antflix.net#515.16)", + "displayTitle": "515.16 Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#515.16" + } + ], + "url": "https://2023.antflix.net#515" + }, + { + "displayTitle": "Article 516 Spray Application, Dipping, Coating, and Printing Processes Using Flammable or Combustible Materials", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_77_I" + }, + { + "body": "This article covers the regular or frequent application of flammable liquids, combustible liquids, and combustible powders by spray operations and the application of flammable liquids or combustible liquids at temperatures above their flashpoint by spraying, dipping, coating, printing, or other means. Informational Note No. 1: See NFPA 33-2021, Standard for Spray Application Using Flammable or Combustible Materials, or NFPA 34-2021, Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids, for extracted text that is followed by a reference in brackets. Only editorial changes were made to the extracted text to make it consistent with this Code. Informational Note No. 2: See NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids, for information regarding ventilation. [516.1](https://2023.antflix.net#516.1)", + "displayTitle": "516.1 Scope", + "children": [], + "url": "https://2023.antflix.net#516.1" + }, + { + "body": "In addition to the requirements of this article, spray application, dipping, coating, and printing processes using flammable or combustible materials shall comply with Table 516.2, as applicable, except as modified by this article. Table 516.2 Other Articles Requirement Division Classified Locations Zone Classified Locations Area classification 500.5, 500.6 505.5, 505.6, 505.7, 506.5, 506.6, 506.7 Equipment 500.7, 500.8, 501.5, 502.5, 502.6, Part III of 501, Part III of 502 505.8, 505.9, 505.20, 505.22, 506.8, 506.9 Wiring Part II of 501, Part II of 502 505.15, 505.16, 505.17, 505.18, 505.19, 505.26, 505.30, 506.15, 506.17, 506.20, 506.30 [516.2](https://2023.antflix.net#516.2)", + "displayTitle": "516.2 Other Articles", + "children": [], + "url": "https://2023.antflix.net#516.2" + }, + { + "body": "Where the term Class I is used with respect to Zone classifications within this article of the Code, it shall apply to Zone 0, Zone 1, and Zone 2 designations. Informational Note: The term Class I was originally included as a prefix to Zone 0, Zone 1, and Zone 2 locations and references as an identifier for flammable gases, vapors, or liquids to differentiate from Class II and Class III locations. Zone 0, Zone 1, and Zone 2 only apply to flammable gases, vapors, or liquids so the Class I prefix is redundant and has been deleted, except for text that is extracted from other documents or to remain consistent throughout this article. [516.3](https://2023.antflix.net#516.3)", + "displayTitle": "516.3 Class I Locations", + "children": [], + "url": "https://2023.antflix.net#516.3" + }, + { + "displayTitle": "Part II Open Containers", + "children": [], + "url": "https://2023.antflix.net#divider_77_II" + }, + { + "body": "Area classification for open containers, supply containers, waste containers, spray gun cleaners, and solvent distillation units that contain Class I liquids and are located in ventilated areas shall be in accordance with the following: The area within 915 mm (3 ft) in all directions from any such container or equipment and extending to the floor or grade level shall be classified as Class I, Division 1 or Zone 1, whichever is applicable. [33:6.5.5.1(1)]The area extending 610 mm (2 ft) beyond the Division 1 or Zone 1 location shall be classified as Class I, Division 2 or Zone 2, whichever is applicable. [33:6.5.5.1(2)]The area extending 1525 mm (5 ft) horizontally beyond the area described in 516.4(2) up to a height of 460 mm (18 in.) above the floor or grade level shall be classified as Class I, Division 2 or Zone 2, whichever is applicable. [33:6.5.5.1(3)]The area inside any tank or container shall be classified as Class I, Division 1 or Zone 0, whichever is applicable. [33:6.5.5.1(4)]Sumps, pits, or belowgrade channels within 3.05 m (10 ft) horizontally of a vapor source shall be classified as Class I, Division 1 or Zone 1. If the sump, pit, or channel extends beyond 3.05 m (10 ft) from the vapor source, it shall be provided with a vapor stop or be classified as Class I, Division 1 or Zone 1 for its entire length.For the purposes of electrical area classification, the Division system and the Zone system shall not be intermixed for any given source of release. [33:6.2.3]Electrical wiring and utilization equipment installed in these areas shall be suitable for the location, as shown in Figure 516.4. [33:6.5.5.2]FIGURE 516.4 Electrical Area Classification for Class I Liquid Operations Around Open Containers. Supply Containers, Waste Containers, Spray Gun Cleaners, and Solvent Distillation Units. [33: Figure 6.5.5.2] [516.4](https://2023.antflix.net#516.4)", + "displayTitle": "516.4 Area Classification", + "children": [], + "url": "https://2023.antflix.net#516.4" + }, + { + "displayTitle": "Part III Spray Application Processes", + "children": [], + "url": "https://2023.antflix.net#divider_68_III" + }, + { + "body": "For spray application processes, the area classification is based on quantities of flammable vapors, combustible mists, residues, dusts, or deposits that are present or might be present in quantities sufficient to produce ignitable or explosive mixtures with air. [516.5](https://2023.antflix.net#516.5)", + "displayTitle": "516.5 Area Classification", + "children": [ + { + "displayTitle": "(A) Zone Classification of Locations", + "children": [ + { + "body": "The Zone system of electrical area classification shall be applied as follows: The inside of closed containers or vessels shall be considered a Class I, Zone 0 location.A Class I, Division 1 location shall be permitted to be alternatively classified as a Class I, Zone 1 location.A Class I, Division 2 location shall be permitted to be alternatively classified as a Class I, Zone 2 location.A Class II, Division 1 location shall be permitted to be alternatively classified as a Zone 21 location.A Class II, Division 2 location shall be permitted to be alternatively classified as a Zone 22 location. [33:6.2.2] [516.5_(A)_(1)](https://2023.antflix.net#516.5_(A)_(1))", + "displayTitle": "(1) Classification of Locations", + "children": [], + "url": "https://2023.antflix.net#516.5_(A)_(1)" + }, + { + "body": "For the purposes of electrical area classification, the Division system and the Zone system shall not be intermixed for any given source of release. [33:6.2.3] In instances of areas within the same facility classified separately, Class I, Zone 2 locations shall be permitted to abut, but not overlap, Class I, Division 2 locations. Class I, Zone 0 or Zone 1 locations shall not abut Class I, Division 1 or Division 2 locations. [33:6.2.4] [516.5_(A)_(2)](https://2023.antflix.net#516.5_(A)_(2))", + "displayTitle": "(2) Classification Systems", + "children": [], + "url": "https://2023.antflix.net#516.5_(A)_(2)" + }, + { + "body": "Open flames, spark-producing equipment or processes, and equipment whose exposed surfaces exceed the autoignition temperature of the material being sprayed shall not be located in a spray area or in any surrounding area that is classified as Division 2, Zone 2, or Zone 22. [33:6.2.5] Exception: This requirement shall not apply to drying, curing, or fusing apparatus. Any utilization equipment or apparatus that is capable of producing sparks or particles of hot metal and that is located above or adjacent to either the spray area or the surrounding Division 2, Zone 2, or Zone 22 areas shall be of the totally enclosed type or shall be constructed to prevent the escape of sparks or particles of hot metal. [33:6.2.6] [516.5_(A)_(3)](https://2023.antflix.net#516.5_(A)_(3))", + "displayTitle": "(3) Equipment", + "children": [], + "url": "https://2023.antflix.net#516.5_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#516.5_(A)" + }, + { + "body": "The interior of any open or closed container or vessel of a flammable liquid shall be considered Class I, Division 1, or Class I, Zone 0. as applicable. Informational Note: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, Chapter 6, for additional information. [516.5_(B)](https://2023.antflix.net#516.5_(B))", + "displayTitle": "(B) Class I, Division 1 or Class I, Zone 0 Locations", + "children": [], + "url": "https://2023.antflix.net#516.5_(B)" + }, + { + "body": "The following spaces shall be considered Class I, Division 1; Class I, Zone 1; Class II, Division 1; or Zone 21 locations, as applicable: The interior of spray booths and rooms except as specifically provided in 516.5(D).The interior of exhaust ducts.Any area in the direct path of spray operations.Sumps, pits, or below grade channels within 7620 mm (25 ft) horizontally of a vapor source. If the sump, pit, or channel extends beyond 7620 mm (25 ft) from the vapor source, it shall be provided with a vapor stop or it shall be classified as Class I, Division 1 for its entire length. [34:6.4.1]All space in all directions outside of but within 900 mm (3 ft) of open containers, supply containers, spray gun cleaners, and solvent distillation units containing flammable liquids.For limited finishing workstations, the area inside the curtains or partitions. [See Figure 516.5(D)(5).] [516.5_(C)](https://2023.antflix.net#516.5_(C))", + "displayTitle": "(C) Class I, Division 1: Class I, Zone 1; Class II, Division 1; or Zone 21 Locations", + "children": [], + "url": "https://2023.antflix.net#516.5_(C)" + }, + { + "body": "The spaces listed in 516.5(D)(1) through (D)(5) shall be considered Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 as applicable. [516.5_(D)](https://2023.antflix.net#516.5_(D))", + "displayTitle": "(D) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations", + "children": [ + { + "body": "Electrical wiring and utilization equipment located outside but within 6100 mm (20 ft) horizontally and 3050 mm (10 ft) vertically of an enclosed spray area and not separated from the spray area by partitions extending to the boundaries of the area designated as Division 2, Zone 2 or Zone 22 in Figure 516.5(D)(1) shall be suitable for Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable. [33:6.5.1] [See Figure 516.5(D)(1).] [516.5_(D)_(1)](https://2023.antflix.net#516.5_(D)_(1))", + "displayTitle": "(1) Unenclosed Spray Processes", + "children": [], + "url": "https://2023.antflix.net#516.5_(D)_(1)" + }, + { + "body": "If spray application operations are conducted within a closed-top, open-face, or open-front booth or room, as shown in Figure 516.5(D)(2), any electrical wiring or utilization equipment located outside of the booth or room but within 915 mm (3 ft) of any opening shall be suitable for Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable. The Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations shown in Figure 516.5(D)(2) shall extend from the edges of the open face or open front of the booth or room. [516.5_(D)_(2)](https://2023.antflix.net#516.5_(D)_(2))", + "displayTitle": "(2) Closed-Top, Open-Face, and Open-Front Spray Booths and Spray Rooms", + "children": [], + "url": "https://2023.antflix.net#516.5_(D)_(2)" + }, + { + "body": "For spraying operations conducted within an open top spray booth, the space 915 mm (3 ft) vertically above the booth and within 915 mm (3 ft) of other booth openings shall be considered Class I, Division 2; Class I, Zone 2; Class I1. Division 2; or Zone 22 whichever is applicable. [33:6.5.3] [516.5_(D)_(3)](https://2023.antflix.net#516.5_(D)_(3))", + "displayTitle": "(3) Open-Top Spray Booths", + "children": [], + "url": "https://2023.antflix.net#516.5_(D)_(3)" + }, + { + "body": "For spray application operations confined to an enclosed spray booth or room, electrical area classification shall be as follows: The area within 915 mm (3 ft) of any opening shall be classified as Class I, Division 2; Class I, Zone 2; Class II. Division 2; or Zone 22 locations, whichever is applicable, as shown in Figure 516.5(D)(4).Where automated spray application equipment is used, the area outside the access doors shall be unclassified provided the door interlock prevents the spray application operations when the door is open.Where exhaust air is permitted to be recirculated, both of the following shall apply:The interior of any recirculation path from the secondary particulate filters up to and including the air supply plenum shall be classified as Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable.The interior of fresh air supply ducts shall be unclassified.Where exhaust air is not recirculated, the interior of fresh air supply ducts and fresh air supply plenums shall be unclassified.[33:6.5.4] [516.5_(D)_(4)](https://2023.antflix.net#516.5_(D)_(4))", + "displayTitle": "(4) Enclosed Spray Booths and Spray Rooms", + "children": [], + "url": "https://2023.antflix.net#516.5_(D)_(4)" + }, + { + "body": "For limited finishing workstations, the area inside the 915 mm (3 ft) space horizontally and vertically beyond the volume enclosed by the outside surface of the curtains or partitions shall be classified as Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22, as shown in Figure 516.5(D)(5).A limited finishing workstation shall be designed and constructed to have all of the following:A dedicated make-up air supplyCurtains or partitions that are noncombustible or limited combustibleA dedicated mechanical exhaust and filtration systemAn approved automatic extinguishing system [33:14.3.1]Informational Note: See NFPA 701, Standard Methods of Fire Tests for Flame Propagation of Textiles and Films, for information on limited combustible curtains or partitions.The amount of material sprayed in a limited finishing workstation shall not exceed 3.8 L (1 gal) in any 8-hour period. [33:14.3.2]Curtains or partitions shall be fully closed during any spray operations. [33:14.3.4]The equipment within the limited finishing workstation shall be interlocked such that the spray application equipment cannot be operated unless the exhaust ventilation system is operating and functioning properly and spray application is automatically stopped if the exhaust ventilation system fails.Any limited finishing workstation used for spray application operations shall not be used for any operation that is capable of producing sparks or particles of hot metal or for operations that involve open flames or electrical utilization equipment capable of producing sparks or particles of hot metal. [33:14.3.6]Where industrial air heaters are used to elevate the air temperature for drying, curing, or fusing operations, a high limit switch shall be provided to automatically shut off the drying apparatus if the air temperature in the limited finishing workstation exceeds the maximum discharge-air temperature allowed by the standard that the heater is listed to or 93\u00b0C, (200\u00b0F), whichever is less. [33:14.3.7.1]A means shall be provided to show that the limited finishing workstation is in the drying or curing mode of operation and that the limited finishing workstation is to be unoccupied. [33:14.3.7.2]Any containers of flammable or combustible liquids shall be removed from the limited finishing workstation before the drying apparatus is energized. [33:14.3.7.3]Portable spot-drying, curing, or fusion apparatus shall be permitted to be used in a limited finishing workstation, provided that it is not located within the hazardous (classified) location defined in 14.3.5 of NFPA 33 when spray application operations are being conducted. [33:14.3.8]Recirculation of exhaust air shall be permitted when the provisions of 516.5(D)(4)(3) are both met. [33:14.3.9]FIGURE 516.5(D)(1) Electrical Area Classification for Unenclosed Spray Areas. [33:Figure 6.5.1]FIGURE 516.5(D)(2) Class I, Division 2; Class I. Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to a Closed Top, Open Face, or Open Front Spray Booth or Room. [33:Figure 6.5.2(a)]FIGURE 516.5(D)(4) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to an Enclosed Spray Booth or Spray Room. [33:Figure 6.5.4]FIGURE 516.5(D)(5) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to a Limited Finishing Workstation. [33:Figure 14.3.6.1] [516.5_(D)_(5)](https://2023.antflix.net#516.5_(D)_(5))", + "displayTitle": "(5) Limited Finishing Workstations", + "children": [], + "url": "https://2023.antflix.net#516.5_(D)_(5)" + } + ], + "url": "https://2023.antflix.net#516.5_(D)" + } + ], + "url": "https://2023.antflix.net#516.5" + }, + { + "displayTitle": "516.6 Wiring and Equipment in Class I Locations", + "children": [ + { + "body": "All electrical wiring and equipment within the hazardous (classified) locations (containing vapor only - not residues) defined in 516.5 shall comply with the requirements of Part II and Part III of Article 501 or with 505.17 through 505.30, as applicable. [516.6_(A)](https://2023.antflix.net#516.6_(A))", + "displayTitle": "(A) Wiring and Equipment - Vapors", + "children": [], + "url": "https://2023.antflix.net#516.6_(A)" + }, + { + "body": "Unless specifically listed for locations containing deposits of dangerous quantities of flammable or combustible vapors, mists, residues, dusts, or deposits (as applicable), there shall be no electrical equipment in any spray area as herein defined whereon deposits of combustible residue could readily accumulate, except wiring in rigid metal conduit, intermediate metal conduit, Type MI cable, or in metal boxes or fittings containing no taps, splices, or terminal connections. [33:6.4.2] [516.6_(B)](https://2023.antflix.net#516.6_(B))", + "displayTitle": "(B) Wiring and Equipment - Vapors and Residues", + "children": [], + "url": "https://2023.antflix.net#516.6_(B)" + }, + { + "body": "Luminaires shall be permitted to be installed as follows: Luminaires, like that shown in Figure 516.6(C)(1), that are attached to the walls or ceiling of a spray area but that are outside any classified area and are separated from the spray area by glass panels shall be suitable for use in unclassified locations. Such fixtures shall be serviced from outside the spray area. [33:6.6.1]Luminaires, like that shown in Figure 516.6(C)(1), that are attached to the walls or ceiling of a spray area; that are separated from the spray area by glass panels and that are located within a Class I, Division 2; a Class I, Zone 2; a Class II, Division 2; or a Zone 22 location shall be suitable for such location. Such fixtures shall be serviced from outside the spray area. [33:6.6.2]Luminaires, like that shown in Figure 516.6(C)(2), that are an integral part of the walls or ceiling of a spray area shall be permitted to be separated from the spray area by glass panels that are an integral part of the fixture. Such fixtures shall be listed for use in Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable, and also shall be listed for accumulations of deposits of combustible residues. Such fixtures shall be permitted to be serviced from inside the spray area. [33:6.6.3]Glass panels used to separate luminaires from the spray area or that are an integral part of the luminaire shall meet the following requirements:Panels for luminaires or for observation shall be of heat-treated glass, laminated glass, wired glass, or hammered-wired glass and shall be sealed to confine vapors, mists, residues, dusts, and deposits to the spray area. [33:5.5.1]Exception to a.: Listed spray booth assemblies that have vision panels constructed of other materials shall be permitted.Panels for luminaires shall be separated from the luminaire to prevent the surface temperature of the panel from exceeding 93\u00b0C (200\u00b0F). [33:5.5.2]The panel frame and method of attachment shall be designed to not fail under fire exposure before the vision panel fails. [33:5.5.3] [516.6_(C)](https://2023.antflix.net#516.6_(C))", + "displayTitle": "(C) Illumination", + "children": [], + "url": "https://2023.antflix.net#516.6_(C)" + }, + { + "body": "Portable electric luminaires or other utilization equipment shall not be used in a spray area during spray operations. Exception No. 1: Where portable electric luminaires are required for operations in spaces not readily illuminated by fixed lighting within the spraying area, they shall be of the type identified for Class I, Division 1 or Class I, Zone 1 locations where readily ignitible residues could be present. [33:6.9 Exception] Exception No. 2: Where portable electric drying apparatus is used in spray booths and the following requirements are met: (1) The apparatus and its electrical connections are not located within the spray enclosure during spray operations. (2) Electrical equipment within 450 mm (18 in.) of the floor is identified for Class I, Division 2 or Class I, Zone 2 locations. (3) All metallic parts of the drying apparatus are electrically bonded and grounded. (4) Interlocks are provided to prevent the operation of spray equipment while, drying apparatus is within the spray enclosure, to allow for a 3-minute purge of the enclosure before energizing the drying apparatus and to shut off drying apparatus on failure of ventilation system. [516.6_(D)](https://2023.antflix.net#516.6_(D))", + "displayTitle": "(D) Portable Equipment", + "children": [], + "url": "https://2023.antflix.net#516.6_(D)" + }, + { + "body": "Electrostatic spraying or detearing equipment shall be installed and used only as provided in 516.10. Informational Note: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, for additional information. [516.6_(E)](https://2023.antflix.net#516.6_(E))", + "displayTitle": "(E) Electrostatic Equipment", + "children": [], + "url": "https://2023.antflix.net#516.6_(E)" + }, + { + "body": "All persons and all electrically conductive objects, including any metal parts of the process equipment or apparatus, containers of material, exhaust ducts, and piping systems that convey flammable or combustible liquids, shall be electrically grounded. [34:6.8.1] FIGURE 516.6(C)(1) Example of a Luminaire Mounted Outside the Spray Area and Serviced from Outside the Spray Area. [33:Figure 6.6.1.1] FIGURE 516.6(C)(2) Example of Luminaires That Are Integral Parts of the Spray Area and That Are Serviced from Inside the Spray Area. [33:Figure 6.6.3.1] [516.6_(F)](https://2023.antflix.net#516.6_(F))", + "displayTitle": "(F) Static Electric Discharges", + "children": [], + "url": "https://2023.antflix.net#516.6_(F)" + } + ], + "url": "https://2023.antflix.net#516.6" + }, + { + "displayTitle": "516.7 Wiring and Equipment Not Within Hazardous (Classified) Locations", + "children": [ + { + "body": "All fixed wiring above hazardous (classified) locations shall be permitted to be one or more of the following: Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with listed threaded or threadless fittings, or electrical metallic tubing (EMT) with listed fittings.Rigid polyvinyl chloride conduit (PVC), reinforced thermosetting resin conduit (RTRC), or electrical nonmetallic tubing (ENT).Type MC cable, Type TC cable, or Type TC-ER cable, including installation in cable trays, terminated with listed fittings. Type TC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Type MI cable terminated with listed fittings and installed and supported to avoid tensile stress.Type PLTC cable or Type PLTC-ER cable used in Class 2 or Class 3 circuits. Type PLTC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Type ITC cable or Type ITC-ER cable in accordance with 335.4 and 335.5 and terminated with listed fittings. Type ITC-ER cable shall include an EGC in addition to any drain wire.Cellular metal raceways supplying ceiling outlets or as extensions to the area below the floor of a hazardous (classified) location. If cellular metal raceways are used, they shall not have connections leading into or passing through the hazardous (classified) location unless suitable seals are provided. [516.7_(A)](https://2023.antflix.net#516.7_(A))", + "displayTitle": "(A) Wiring", + "children": [], + "url": "https://2023.antflix.net#516.7_(A)" + }, + { + "body": "Equipment that could produce arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make-and-break or sliding contacts, where installed above a classified location or above a location where freshly finished goods are handled, shall be of the totally enclosed type or be constructed to prevent the escape of sparks or hot metal particles. [516.7_(B)](https://2023.antflix.net#516.7_(B))", + "displayTitle": "(B) Equipment", + "children": [], + "url": "https://2023.antflix.net#516.7_(B)" + } + ], + "url": "https://2023.antflix.net#516.7" + }, + { + "displayTitle": "516.10 Special Equipment", + "children": [ + { + "body": "This section shall apply to any equipment using electrostatically charged elements for the atomization, charging, and/or precipitation of hazardous materials for coatings on articles or for other similar purposes in which the charging or atomizing device is attached to a mechanical support or manipulator, including robotic devices. This section shall not apply to devices that are held or manipulated by hand. Where robot or programming procedures involve manual manipulation of the robot arm while spraying with the high voltage on, the requirements of 516.10(B) shall apply. The installation of electrostatic spraying equipment shall comply with the requirements of 516.10(A)(1) through (A)(10). Spray equipment shall be listed. All automatic electrostatic equipment systems shall comply with the requirements of 516.6(B) through (D) and 516.6(F). [516.10_(A)](https://2023.antflix.net#516.10_(A))", + "displayTitle": "(A) Fixed Electrostatic Equipment", + "children": [ + { + "body": "Transformers, high-voltage supplies, control apparatus, and all other electrical portions of the equipment shall be installed outside of the Class I location or be of a type identified for the location. Exception: High-voltage grids, electrodes, electrostatic atomizing heads, and their connections shall be permitted within the Class I location. [516.10_(A)_(1)](https://2023.antflix.net#516.10_(A)_(1))", + "displayTitle": "(1) Power and Control Equipment", + "children": [], + "url": "https://2023.antflix.net#516.10_(A)_(1)" + }, + { + "body": "Electrodes and electrostatic atomizing heads shall be adequately supported in permanent locations and shall be effectively insulated from ground. Electrodes and electrostatic atomizing heads that are permanently attached to their bases, supports, reciprocators, or robots shall be deemed to comply with this section. [516.10_(A)_(2)](https://2023.antflix.net#516.10_(A)_(2))", + "displayTitle": "(2) Electrostatic Equipment", + "children": [], + "url": "https://2023.antflix.net#516.10_(A)_(2)" + }, + { + "body": "High-voltage leads shall be properly insulated and protected from mechanical damage or exposure to destructive chemicals. Any exposed element at high voltage shall be effectively and permanently supported on suitable insulators and shall be effectively guarded against accidental contact or grounding. [516.10_(A)_(3)](https://2023.antflix.net#516.10_(A)_(3))", + "displayTitle": "(3) High-Voltage Leads", + "children": [], + "url": "https://2023.antflix.net#516.10_(A)_(3)" + }, + { + "body": "Goods being coated using this process shall be supported on conveyors or hangers. The conveyors or hangers shall be arranged (1) to ensure that the parts being coated are electrically connected to ground with a resistance of 1 megohm or less and (2) to prevent parts from swinging. [516.10_(A)_(4)](https://2023.antflix.net#516.10_(A)_(4))", + "displayTitle": "(4) Support of Goods", + "children": [], + "url": "https://2023.antflix.net#516.10_(A)_(4)" + }, + { + "body": "Electrostatic apparatus shall be equipped with automatic means that will rapidly de-energize the high-voltage elements under any of the following conditions: Stoppage of ventilating fans or failure of ventilating equipment from any causeStoppage of the conveyor carrying goods through the high-voltage field unless stoppage is required by the spray processOccurrence of excessive current leakage at any point in the high-voltage systemDe-energizing the primary voltage input to the power supply [516.10_(A)_(5)](https://2023.antflix.net#516.10_(A)_(5))", + "displayTitle": "(5) Automatic Controls", + "children": [], + "url": "https://2023.antflix.net#516.10_(A)_(5)" + }, + { + "body": "All electrically conductive objects in the spray area, except those objects required by the process to be at high voltage, shall be adequately grounded. This requirement shall apply to paint containers, wash cans, guards, hose connectors, brackets, and any other electrically conductive objects or devices in the area. Informational Note: See NFPA 33, Standard for Spray Application Using Flammable nr Combustible Materials; NFPA 34, Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids, and NFPA 77, Recommended Practice on Static Electricity, for information on grounding and bonding for static electricity purposes. [516.10_(A)_(6)](https://2023.antflix.net#516.10_(A)_(6))", + "displayTitle": "(6) Grounding", + "children": [], + "url": "https://2023.antflix.net#516.10_(A)_(6)" + }, + { + "body": "Safeguards such as adequate booths, fencing, railings, interlocks, or other means shall be placed about the equipment or incorporated therein so that they, either by their location, character, or both, ensure that a safe separation of the process is maintained. [516.10_(A)_(7)](https://2023.antflix.net#516.10_(A)_(7))", + "displayTitle": "(7) Isolation", + "children": [], + "url": "https://2023.antflix.net#516.10_(A)_(7)" + }, + { + "body": "Signs shall be conspicuously posted to convey the following: Designate the process zone as dangerous with regard to lire and accidentIdentify the grounding requirements for all electrically conductive objects in the spray areaRestrict access to qualified personnel only [516.10_(A)_(8)](https://2023.antflix.net#516.10_(A)_(8))", + "displayTitle": "(8) Signs", + "children": [], + "url": "https://2023.antflix.net#516.10_(A)_(8)" + }, + { + "body": "All insulators shall be kept clean and dry. [516.10_(A)_(9)](https://2023.antflix.net#516.10_(A)_(9))", + "displayTitle": "(9) Insulators", + "children": [], + "url": "https://2023.antflix.net#516.10_(A)_(9)" + }, + { + "body": "Spray equipment that cannot be classified as nonincendive shall comply with 516.10(A) (10) (a) and (A) (10) (b). Conveyors, hangers, and application equipment shall be arranged so that a minimum separation of at least twice the sparking distance is maintained between the workpiece or material being sprayed and electrodes, electrostatic atomizing heads, or charged conductors. Warnings defining this safe distance shall be posted. [33:11.4.1]The equipment shall provide an automatic means of rapidly de-energizing the high-voltage elements in the event the distance between the goods being painted and the electrodes or electrostatic atomizing heads falls below that specified in 516.10(A)(10)(a). [33:11.3.8] [516.10_(A)_(10)](https://2023.antflix.net#516.10_(A)_(10))", + "displayTitle": "(10) Other Than Nonincendive Equipment", + "children": [], + "url": "https://2023.antflix.net#516.10_(A)_(10)" + } + ], + "url": "https://2023.antflix.net#516.10_(A)" + }, + { + "body": "This section shall apply to any equipment using electrostatically charged elements for the atomization, charging, or precipitation of flammable and combustible materials for coatings on articles, or for other similar purposes in which the charging or atomizing device is hand-held and manipulated during the spraying operation. Electrostatic hand-spraying equipment and devices used in connection with paint-spraying operations shall be of listed types and shall comply with 516.10(B)(1) through (B)(5). [516.10_(B)](https://2023.antflix.net#516.10_(B))", + "displayTitle": "(B) Hand-Spraying Electrostatic Equipment", + "children": [ + { + "body": "The high-voltage circuits shall be designed so as not to produce a spark of sufficient intensity to ignite the most readily ignitible of those vapor\u2014air mixtures likely to be encountered or result in appreciable shock hazard upon coming in contact with a grounded object under all normal operating conditions. The electrostatically charged exposed elements of the handgun shall be capable of being energized only by an actuator that also controls the coating material supply. [516.10_(B)_(1)](https://2023.antflix.net#516.10_(B)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#516.10_(B)_(1)" + }, + { + "body": "Transformers, power packs, control apparatus, and all other electrical portions of the equipment shall be located outside of the Class I location or be identified for the location. Exception: The handgun itself and its connections to the power supply shall be permitted within the Class I location. [516.10_(B)_(2)](https://2023.antflix.net#516.10_(B)_(2))", + "displayTitle": "(2) Power Equipment", + "children": [], + "url": "https://2023.antflix.net#516.10_(B)_(2)" + }, + { + "body": "The handle of the spraying gun shall be electrically connected to ground by a conductive material and be constructed so that the operator in normal operating position is in electrical contact with the grounded handle with a resistance of not more than 1 megohm to prevent buildup of a static charge on the operator's body. Signs indicating the necessity for grounding other persons entering the spray area shall be conspicuously posted. [516.10_(B)_(3)](https://2023.antflix.net#516.10_(B)_(3))", + "displayTitle": "(3) Handle", + "children": [], + "url": "https://2023.antflix.net#516.10_(B)_(3)" + }, + { + "body": "All electrically conductive objects in the spraying area, except those objects required by the process to be at high voltage shall be electrically connected to ground with a resistance of not more than 1 megohm. This requirement shall apply to paint containers, wash cans, and any other electrical conductive objects or devices in the area. The equipment shall carry a prominent, permanently installed warning regarding the necessity for this grounding feature. Informational Note: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, NFPA 34, Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids, and NFPA 77, Recommended Practice on Static Electricity, for information on grounding and bonding for static electricity purposes. [516.10_(B)_(4)](https://2023.antflix.net#516.10_(B)_(4))", + "displayTitle": "(4) Electrostatic Equipment", + "children": [], + "url": "https://2023.antflix.net#516.10_(B)_(4)" + }, + { + "body": "Objects being painted shall be maintained in electrical contact with the conveyor or other grounded support. Hooks shall be regularly cleaned to ensure adequate grounding of 1 megohm or less. Areas of contact shall be sharp points or knife edges where possible. Points of support of the object shall be concealed from random spray where feasible, and, where the objects being sprayed are supported from a conveyor, the point of attachment to the conveyor shall be located so as to not collect spray material during normal operation. [516.10_(B)_(5)](https://2023.antflix.net#516.10_(B)_(5))", + "displayTitle": "(5) Support of Objects", + "children": [], + "url": "https://2023.antflix.net#516.10_(B)_(5)" + } + ], + "url": "https://2023.antflix.net#516.10_(B)" + }, + { + "body": "This section shall apply to processes in which combustible dry powders are applied. The hazards associated with combustible dusts are present in such a process to a degree, depending on the chemical composition of the material, particle size, shape, and distribution. [516.10_(C)](https://2023.antflix.net#516.10_(C))", + "displayTitle": "(C) Powder Coating", + "children": [ + { + "body": "Electrical equipment and other sources of ignition shall comply with the requirements of Part III of Article 502 or 506.20, as applicable. Portable electric luminaires and other utilization equipment shall not be used within a Class II location during operation of the finishing processes. Such luminaires or utilization equipment used during cleaning or repairing operations shall be of a type identified for Class II, Division 1 locations and all exposed metal parts shall be connected to an equipment grounding conductor. Exception: Portable electric luminaires shall be of the type listed for Class II, Division 1 locations where required for operations in spaces not readily illuminated by fixed lighting within the spraying area and where readily ignitible residues might be present. [516.10_(C)_(1)](https://2023.antflix.net#516.10_(C)_(1))", + "displayTitle": "(1) Electrical Equipment and Sources of Ignition", + "children": [], + "url": "https://2023.antflix.net#516.10_(C)_(1)" + }, + { + "body": "The provisions of 516.10(A) and 516.10(C)(1) shall apply to fixed electrostatic spraying equipment. [516.10_(C)_(2)](https://2023.antflix.net#516.10_(C)_(2))", + "displayTitle": "(2) Fixed Electrostatic Spraying Equipment", + "children": [], + "url": "https://2023.antflix.net#516.10_(C)_(2)" + }, + { + "body": "The provisions of 516.10(B) and 516.10(C)(1) shall apply to electrostatic hand-spraying equipment. [516.10_(C)_(3)](https://2023.antflix.net#516.10_(C)_(3))", + "displayTitle": "(3) Electrostatic Hand-Spraying Equipment", + "children": [], + "url": "https://2023.antflix.net#516.10_(C)_(3)" + }, + { + "body": "Electrostatic fluidized beds and associated equipment shall be of identified types. The high-voltage circuits shall be designed such that any discharge produced when the charging electrodes of the bed are approached or contacted by a grounded object shall not be of sufficient intensity to ignite any powder-air mixture likely to be encountered or to result in an appreciable shock hazard. Transformers, power packs, control apparatus, and all other electrical portions of the equipment shall be located outside the powder-coating area or shall otherwise comply with the requirements of 516.10(C)(1).Exception: The charging electrodes and their connections to the power supply shall be permitted within the powder-coating area.All electrically conductive objects within the powder-coating area shall be adequately grounded. The powder-coating equipment shall carry a prominent, permanently installed warning regarding the necessity for grounding these objects.Informational Note: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials; NFPA 34, Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids; and NFPA 77, Recommended Practice on Static Electricity, for information on grounding and bonding for static electricity purposes.Objects being coated shall be maintained in electrical contact (less than 1 megohm) with the conveyor or other support in order to ensure proper grounding. Hangers shall be regularly cleaned to ensure effective electrical contact. Areas of electrical contact shall be sharp points or knife edges where possible.The electrical equipment and compressed air supplies shall be interlocked with a ventilation system so that the equipment cannot be operated unless the ventilating fans are in operation. [33:Chapter 15] [516.10_(C)_(4)](https://2023.antflix.net#516.10_(C)_(4))", + "displayTitle": "(4) Electrostatic Fluidized Beds", + "children": [], + "url": "https://2023.antflix.net#516.10_(C)_(4)" + } + ], + "url": "https://2023.antflix.net#516.10_(C)" + } + ], + "url": "https://2023.antflix.net#516.10" + }, + { + "body": "All metal raceways, the metal armors or metallic sheath on cables, and all non\u2014current-carrying metal parts of fixed or portable electrical equipment, regardless of voltage, shall be grounded and bonded. Grounding and bonding shall comply with 501.30, 502.30, or 505.30, as applicable. [516.16](https://2023.antflix.net#516.16)", + "displayTitle": "516.16 Grounding", + "children": [], + "url": "https://2023.antflix.net#516.16" + }, + { + "displayTitle": "Part IV Spray Application Operations in Membrane Enclosures", + "children": [], + "url": "https://2023.antflix.net#divider_20_IV" + }, + { + "body": "Electrical area classification shall be as follows: The area within the membrane enclosure shall be considered a Class I, Division 1 area, as shown in Figure 516.18.A 1.5 m (5 ft) zone outside of the membrane enclosure shall be considered Class I, Division 2, as shown in Figure 516.18.Informational Note No. 1: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, for information on occupancy, ventilation, fire protection, and permitting for spray application operations in membrane enclosures. This document limits spray application operations within both outdoor and indoor temporary membrane enclosures, as well as use and time constraints. The risks to people and property are unique when spray painting within the confined spaces of temporary membrane enclosures.Informational Note No. 2: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, Section 18.6, for the limits of material used in a vertical plane for membrane enclosures.Informational Note No. 3: See NFPA 701, Standard Methods of Fire Tests for Flame Propagation of Textiles and Films, Test Method 2, for construction information.Informational Note No. 4: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, 18.3.2.1.1, for membrane installation beneath sprinklers.Informational Note No. 5: See NFPA 13, Standard for the Installation of Sprinkler Systems, 8.15.15, for information on the protection of membrane structures.FIGURE 516.18 Electrical Classifications for Outdoor Membrane Enclosures. [33:Figure 18.6.1.2] [516.18](https://2023.antflix.net#516.18)", + "displayTitle": "516.18 Area Classification for Temporary Membrane Enclosures", + "children": [], + "url": "https://2023.antflix.net#516.18" + }, + { + "body": "Electrical wiring and utilization equipment used within the classified areas inside and outside of membrane enclosures during spray painting shall be suitable for the location and shall comply with all of the following: All power to the workpiece shall be removed during spray painting.Workpieces shall be grounded.Spray paint equipment shall be grounded.Scaffolding shall be bonded to the workpiece and grounded by an approved method. [516.23](https://2023.antflix.net#516.23)", + "displayTitle": "516.23 Electrical and Other Sources of Ignition", + "children": [], + "url": "https://2023.antflix.net#516.23" + }, + { + "displayTitle": "Part V Printing, Dipping, and Coating Processes", + "children": [], + "url": "https://2023.antflix.net#divider_15_V" + }, + { + "body": "Classification is based on quantities of flammable vapors, combustible mists, residues, dusts, or deposits that are present or might be present in quantities sufficient to produce ignitable or explosive mixtures with air. Electrical wiring and electrical utilization equipment located adjacent to open processes shall comply with the requirements as follows. Examples of these requirements are illustrated in Figure 516.29(1), Figure 516.29(2), Figure 516.29(3), and Figure 516.29(4). Informational Note: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, Chapter 6, and NFPA 34, Standard for Dipping, Coating, and Printing Processes Using Flammable nr Combustible Liquids, Chapter 6, for additional information.Electrical wiring and electrical utilization equipment located in any sump, pit, or below grade channel that is within 7620 mm (25 ft) horizontally of a vapor source, as defined by this standard, shall be suitable for Class I, Division 1 or Class I, Zone 1 locations. If the sump, pit, or channel extends beyond 7620 mm (25 ft) of the vapor source, it shall be provided with a vapor stop, or it shall be classified as Class I, Division 1 or Class I, Zone I for its entire length. [34:6.4.1]Electrical wiring and electrical utilization equipment located within 1525 mm (5 ft) of a vapor source shall be suitable for Class I, Division 1 or Class I, Zone 1 locations. The space inside a dip tank, ink fountain, ink reservoir, or ink tank shall be classified as Class I, Division 1 or Class I. Zone 0, whichever is applicable.Electrical wiring and electrical utilization equipment located within 915 mm (3 ft) of the Class I, Division 1 or Class I, Zone 1 location shall be suitable for Class I. Division 2 or Class I. Zone 2 locations, whichever is applicable.The space 915 mm (3 ft) above the floor and extending 6100 mm (20 ft) horizontally in all directions from the Class I, Division 1 or Class I, Zone 1 location shall be classified as Class I, Division 2 or Class I, Zone 2, and electrical wiring and electrical utilization equipment located within this space shall be suitable for Class I, Division 2 or Class I, Zone 2 locations, whichever is applicable.This space shall be permitted to be nonclassified for purposes of electrical installations if the surface area of the vapor source does not exceed 0.5 m2 (5 ft2), the contents of the dip tank, ink fountain, ink reservoir, or ink tank do not exceed 19 L (5 gal), and the vapor concentration during operating and shutdown periods does not exceed 25 percent of the lower flammable limit.FIGURE 516.29(1) Electrical Area Classification for Open Dipping and Coating Processes Without Vapor Containment or Ventilation. [34: Figure 6.4(a)]FIGURE 516.29(2) Electrical Area Classification for Open Dipping and Coating Processes with Peripheral Vapor Containment and Ventilation - Vapors Confined to Process Equipment. [34:Figure 6.4(b)]FIGURE 516.29(3) Electrical Area Classification for Open Dipping and Coating Processes with Partial Peripheral Vapor Containment and Ventilation - Vapors NOT Confined to Process Equipment. [34:Figure 6.4(c)]FIGURE 516.29(4) Electrical Area Classification for a Typical Printing Process. [34:Figure 6.4(d)] [516.29](https://2023.antflix.net#516.29)", + "displayTitle": "516.29 Classification of Locations", + "children": [], + "url": "https://2023.antflix.net#516.29" + }, + { + "body": "Areas adjacent to enclosed dipping and coating processes are illustrated by Figure 516.35 and shall be classified as follows: The interior of any enclosed dipping or coating process or apparatus shall be a Class I, Division 1 or Class I, Zone 1 location, and electrical wiring and electrical utilization equipment located within this space shall be suitable for Class I, Division 1 or Class I, Zone 1 locations, whichever is applicable. The area inside the dip tank shall be classified as Class I, Division 1 or Class I, Zone 0, whichever is applicable.The space within 915 mm (3 ft) in all directions from any opening in the enclosure and extending to the floor or grade level shall be classified as Class I, Division 2 or Class I, Zone 2, and electrical wiring and electrical utilization equipment located within this space shall be suitable for Class I, Division 2 locations or Class I, Zone 2 locations, whichever is applicable.All other spaces adjacent to an enclosed dipping or coating process or apparatus shall be classified as nonhazardous for purposes of electrical installations.FIGURE 516.35 Electrical Area Classification Around Enclosed Dipping and Coating Processes. [34:Figure 6.5] [516.35](https://2023.antflix.net#516.35)", + "displayTitle": "516.35 Areas Adjacent to Enclosed Dipping and Coating Processes", + "children": [], + "url": "https://2023.antflix.net#516.35" + }, + { + "body": "Open containers, supply containers, waste containers, and solvent distillation units that contain Class I liquids shall be located in areas ventilated in accordance with 516.4. [516.36](https://2023.antflix.net#516.36)", + "displayTitle": "516.36 Equipment and Containers in Ventilated Areas", + "children": [], + "url": "https://2023.antflix.net#516.36" + }, + { + "body": "For printing, coating, and dipping equipment where the process area is enclosed by glass panels that are sealed to confine vapors and mists to the inside of the enclosure, luminaires that are attached to the walls or ceilings of a process enclosure and that are located outside of any classified area shall be permitted to be of general purpose construction. Such luminaires shall be serviced from outside the enclosure. Luminaires that are attached to the walls or ceilings of a process enclosure, are located within the Class I, Division 2 or Class I, Zone 2 location, and are separated from the process area by glass panels that are sealed to confine vapors and mists shall be suitable for use in that location. Such fixtures shall be serviced from outside the enclosure. [516.37](https://2023.antflix.net#516.37)", + "displayTitle": "516.37 Luminaires", + "children": [], + "url": "https://2023.antflix.net#516.37" + }, + { + "displayTitle": "516.38 Wiring and Equipment Not Within Hazardous (Classified) Locations", + "children": [ + { + "body": "Fixed wiring above hazardous (classified) locations shall be permitted to be one or more of the following: Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with listed threaded or threadless fittings, or electrical metallic tubing (EMT) or electrical nonmetallic tubing (Type ENT) with listed fittings.Rigid polyvinyl chloride conduit (PVC) or reinforced thermosetting resin conduit (RTRC).Type MC cable or Type TC cable with listed fittings.Type MI cable terminated with listed fittings and installed and supported to avoid tensile stress.Cellular metal floor raceways only to supply ceiling outlets or as extensions to the area below the floor of a hazardous (classified) location. If cellular metal raceways are used, they shall not have connections leading into or passing through the hazardous (classified) location unless suitable seals are provided. [516.38_(A)](https://2023.antflix.net#516.38_(A))", + "displayTitle": "(A) Wiring", + "children": [], + "url": "https://2023.antflix.net#516.38_(A)" + }, + { + "body": "Equipment that is capable of producing arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make-and-break or sliding contacts, where installed above a classified location or above a location where freshly finished goods are handled, shall be of the totally enclosed type or be constructed to prevent the escape of sparks or hot metal particles. [516.38_(B)](https://2023.antflix.net#516.38_(B))", + "displayTitle": "(B) Equipment", + "children": [], + "url": "https://2023.antflix.net#516.38_(B)" + } + ], + "url": "https://2023.antflix.net#516.38" + }, + { + "body": "All persons and all electrically conductive objects, including any metal parts of the process equipment or apparatus, containers of material, exhaust ducts, and piping systems that convey flammable or combustible liquids, shall be electrically grounded. Provision shall be made to dissipate static electric charges from all nonconductive substrates in printing processes. Informational Note: See NFPA 77, Recommended Practice on Static Electricity, for information on reducing the risk of ignition from electrostatic discharges. [516.40](https://2023.antflix.net#516.40)", + "displayTitle": "516.40 Static Electric Discharges", + "children": [], + "url": "https://2023.antflix.net#516.40" + } + ], + "url": "https://2023.antflix.net#516" + }, + { + "displayTitle": "Article 517 Health Care Facilities", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_78_I" + }, + { + "body": "This article applies to electrical construction and installation criteria in health care facilities that provide services to human beings. The requirements of this article shall specify the installation criteria and wiring methods that minimize electrical hazards by the maintenance of adequately low potential differences only between exposed conductive surfaces that are likely to become energized and could be contacted by a patient. Informational Note No. 1: In a health care facility, it is difficult to prevent the occurrence of a conductive or capacitive path from the patient's body to some grounded object, because that path might be established accidentally or through instrumentation directly connected to the patient. Other electrically conductive surfaces that might make an additional contact with the patient, or instruments that might be connected to the patient, then become possible sources of electric currents that can traverse the patient's body. The hazard is increased as more apparatus is associated with the patient, therefore more intensive precautions are needed. Control of electric shock hazard requires the limitation of electric current that might flow in an electrical circuit involving the patient's body by raising the resistance of the conductive circuit that includes the patient, or by insulating exposed conductive surfaces that might become energized, in addition to reducing the potential difference that can appear between exposed conductive surfaces in the patient care vicinity, or by combinations of these methods. A special problem is presented by the patient with an externalized direct conductive path to the heart muscle. The patient could be electrocuted at current levels so low that additional protection in the design of appliances, insulation of the catheter, and control of medical practice is required. The requirements in Parts II and III not only apply to single-function buildings but are also intended to be individually applied to their respective forms of occupancy within a multifunction building [e.g., a doctor's examining room located within a limited care facility would be required to meet 517.10(A)]. Informational Note No. 2: For information concerning performance, maintenance, and testing criteria, refer to the appropriate health care facilities documents. Informational Note No. 3: Text that is followed by a reference in brackets has been extracted from NFPA 99-2021, Health Care Facilities Code, or NFPA 101-2021, Life Safety Code. Only editorial changes were made to the extracted text to make it consistent with this Code. [517.1](https://2023.antflix.net#517.1)", + "displayTitle": "517.1 Scope", + "children": [], + "url": "https://2023.antflix.net#517.1" + }, + { + "body": "The reconditioning requirements of this Code shall not apply to patient care-related electrical equipment. Informational Note No. 1: Patient care-related electrical equipment is differentiated from electrical equipment as described in 110.21(A)(2). Informational Note No. 2: If patient care\u2014related electrical equipment is relocated, it is expected to be recommissioned or recertified in accordance with the U.S. Federal Food, Drug, and Cosmetic Act (FDCA). [517.6](https://2023.antflix.net#517.6)", + "displayTitle": "517.6 Patient Care-Related Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#517.6" + }, + { + "displayTitle": "Part II Wiring and Protection", + "children": [], + "url": "https://2023.antflix.net#divider_78_II" + }, + { + "displayTitle": "517.10 Applicability", + "children": [ + { + "body": "Part II shall apply to patient care space of all health care facilities. [517.10_(A)](https://2023.antflix.net#517.10_(A))", + "displayTitle": "(A) Applicability", + "children": [], + "url": "https://2023.antflix.net#517.10_(A)" + }, + { + "body": "Part II shall not apply to the following: Business offices, corridors, waiting rooms, and the like in clinics, medical and dental offices, and outpatient facilitiesSpaces of nursing homes and limited care facilities wired in accordance with Chapters 1 through 4 of this Code where these spaces are used exclusively as patient sleeping rooms, as determined by the health care facility's governing bodyInformational Note No. 1: See 406.12(5) for receptacles located in health care facility business offices, corridors, and waiting rooms that are required to be tamper resistant.Informational Note No. 2: See 210.12(D) for branch circuits supplying outlets and receptacles located in patient sleeping rooms in nursing homes and limited care facilities that are connected to arc-fault circuit-interrupter circuits.Areas used exclusively for any of the following purposes:Intramuscular injections (immunizations)Psychiatry and psychotherapyAlternative medicineOptometryPharmacy services not contiguous to health care facilitiesInformational Note No. 3: See NFPA 101-2021, Life Safety Code. [517.10_(B)](https://2023.antflix.net#517.10_(B))", + "displayTitle": "(B) Not Covered", + "children": [], + "url": "https://2023.antflix.net#517.10_(B)" + } + ], + "url": "https://2023.antflix.net#517.10" + }, + { + "body": "Except as modified in this article, wiring methods shall comply with Chapters 1 through 4 of this Code. [517.12](https://2023.antflix.net#517.12)", + "displayTitle": "517.12 Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#517.12" + }, + { + "body": "Wiring serving patient care spaces shall comply with the requirements of 517.13 (A) and (B). Exception: Luminaires more than 2.3 m (71/2 ft) above the floor and switches located outside of the patient care vicinity shall be permitted to be connected to an equipment grounding return path complying with the requirements of 517.13(A) or (B). [517.13](https://2023.antflix.net#517.13)", + "displayTitle": "517.13 Equipment Grounding Conductor for Receptacles and Fixed Electrical Equipment in Patient Care Spaces", + "children": [ + { + "body": "All branch circuits serving patient care spaces shall be provided with an effective ground-fault current path by installation in a metal raceway system or a cable having a metallic armor or sheath assembly. The metal raceway system, metallic cable armor, or sheath assembly shall itself qualify as an equipment grounding conductor in accordance with 250.118. [517.13_(A)](https://2023.antflix.net#517.13_(A))", + "displayTitle": "(A) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#517.13_(A)" + }, + { + "displayTitle": "(B) Insulated Equipment Grounding Conductors and Insulated Equipment Bonding Jumpers", + "children": [ + { + "body": "An insulated copper equipment grounding conductor that is clearly identified along its entire length by green insulation and installed with the branch circuit conductors within the wiring method in accordance with 517.13(A) shall be connected to the following: Grounding terminals of all receptacles other than isolated ground receptaclesMetal outlet boxes, metal device boxes, or metal enclosuresNon-current-carrying conductive surfaces of fixed electrical equipment likely to become energized that are subject to personal contact, operating at over 100 voltsException No. 1: For other than isolated ground receptacles, an insulated equipment bonding jumper that directly connects to the equipment grounding conductor shall be permitted to connect the box and receptacle(s) to the equipment grounding conductor. Isolated ground receptacles shall be connected in accordance with 517.16.Exception No. 2: Metal faceplates shall be connected to an effective ground-fault current path by means of a metal mounting screw(s) securing the faceplate to a metal yoke or strap of a receptacle or to a metal outlet box. [517.13_(B)_(1)](https://2023.antflix.net#517.13_(B)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#517.13_(B)_(1)" + }, + { + "body": "Equipment grounding conductors and equipment bonding jumpers shall be sized in accordance with 250.122. [517.13_(B)_(2)](https://2023.antflix.net#517.13_(B)_(2))", + "displayTitle": "(2) Sizing", + "children": [], + "url": "https://2023.antflix.net#517.13_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#517.13_(B)" + } + ], + "url": "https://2023.antflix.net#517.13" + }, + { + "body": "The equipment grounding terminal buses of the normal and essential branch-circuit panelboards serving the same individual patient care vicinity shall be connected together with an insulated continuous copper conductor not smaller than 10 AWG. Where two or more panelboards serving the same individual patient care vicinity are served from separate transfer switches on the essential electrical system, the equipment grounding terminal buses of those panelboards shall be connected together with an insulated continuous copper conductor not smaller than 10 AWG. This conductor shall be permitted to be broken in order to terminate on the equipment grounding terminal bus in each panelboard. Exception: The insulated continuous copper conductor not smaller than 10 AWG shall be permitted to be terminated on listed connections to aluminum or copper busbars not smaller than 6 mm thick \u00d7 50 mm wide (1/4 in. thick \u00d7 2 in. wide) and of sufficient length to accommodate the number of terminations necessary for the bonding of the panelboards. The busbar shall be securely fastened and installed in an accessible location. [517.14](https://2023.antflix.net#517.14)", + "displayTitle": "517.14 Panelboard Bonding", + "children": [], + "url": "https://2023.antflix.net#517.14" + }, + { + "body": "An isolated ground receptacle, if used, shall not defeat the purposes of the safety features of the grounding systems detailed in 517.13. [99:6.3.2.2.5(A)] [517.16](https://2023.antflix.net#517.16)", + "displayTitle": "517.16 Use of Isolated Ground Receptacles", + "children": [ + { + "body": "An isolated ground receptacle shall not be installed within a patient care vicinity. [99:6.3.2.2.5(B)] [517.16_(A)](https://2023.antflix.net#517.16_(A))", + "displayTitle": "(A) Inside of a Patient Care Vicinity", + "children": [], + "url": "https://2023.antflix.net#517.16_(A)" + }, + { + "body": "Isolated ground receptacle(s) installed in patient care spaces outside of a patient care vicinity(s) shall comply with 517.16(B)(1) and (B)(2). [517.16_(B)](https://2023.antflix.net#517.16_(B))", + "displayTitle": "(B) Outside of a Patient Care Vicinity", + "children": [ + { + "body": "The equipment grounding terminals of isolated ground receptacles installed in branch circuits for patient care spaces shall be connected to an insulated equipment grounding conductor in accordance with 250.146(D) installed in a wiring method described in 517.13(A). The equipment grounding conductor connected to the equipment grounding terminals of isolated ground receptacles in patient care spaces shall be clearly identified along the equipment grounding conductor's entire length by green insulation with one or more yellow stripes. [517.16_(B)_(1)](https://2023.antflix.net#517.16_(B)_(1))", + "displayTitle": "(1)", + "children": [], + "url": "https://2023.antflix.net#517.16_(B)_(1)" + }, + { + "body": "The insulated equipment grounding conductor required in 517.13(B)(1) shall be clearly identified along its entire length by green insulation, with no yellow stripes, and shall not be connected to the grounding terminals of isolated equipment ground receptacles but shall be connected to the box or enclosure indicated in 517.13(B)(1)(2) and to non\u2014current-carrying conductive surfaces of fixed electrical equipment indicated in 517.13(B)(1)(3). Informational Note No. 1: This type of installation is typically used where a reduction of electrical noise (electromagnetic interference) is necessary, and parallel grounding paths are to be avoided. Informational Note No. 2: Care should be taken in specifying a system containing isolated ground receptacles, because the impedance of the effective ground-fault current path is dependent upon the equipment grounding conductor(s) and does not benefit from any conduit or building structure in parallel with the equipment grounding conductor. [517.16_(B)_(2)](https://2023.antflix.net#517.16_(B)_(2))", + "displayTitle": "(2)", + "children": [], + "url": "https://2023.antflix.net#517.16_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#517.16_(B)" + } + ], + "url": "https://2023.antflix.net#517.16" + }, + { + "displayTitle": "517.17 Ground-Fault Protection of Equipment", + "children": [ + { + "body": "The requirements of 517.17 shall apply to buildings or portions of buildings containing health care facilities with Category 1 spaces or utilizing electrical life-support equipment, and buildings that provide the required essential utilities or services for the operation of Category 1 spaces or electrical life-support equipment. [517.17_(A)](https://2023.antflix.net#517.17_(A))", + "displayTitle": "(A) Applicability", + "children": [], + "url": "https://2023.antflix.net#517.17_(A)" + }, + { + "body": "Where ground-fault protection of equipment is provided for operation of the service disconnecting means or feeder disconnecting means as specified by 230.95 or 215.10, an additional step of ground-fault protection shall be provided in all next level feeder disconnecting means downstream toward the load. Such protection shall consist of overcurrent devices and current transformers or other protective equipment that shall cause the feeder disconnecting means to open. The additional levels of ground-fault protection of equipment shall not be installed on the load side of an essential electrical system transfer switch. [517.17_(B)](https://2023.antflix.net#517.17_(B))", + "displayTitle": "(B) Feeders", + "children": [], + "url": "https://2023.antflix.net#517.17_(B)" + }, + { + "body": "Ground-fault protection of equipment for operation of the service and feeder disconnecting means shall be fully selective such that the feeder device, but not the service device, shall open on ground faults on the load side of the feeder device. Separation of ground-fault protection time-current characteristics shall conform to manufacturer's recommendations and shall consider all required tolerances and disconnect operating time to achieve 100 percent selectivity. Informational Note: See 230.95, Informational Note, for transfer of alternate source where ground-fault protection is applied. [517.17_(C)](https://2023.antflix.net#517.17_(C))", + "displayTitle": "(C) Selectivity", + "children": [], + "url": "https://2023.antflix.net#517.17_(C)" + }, + { + "body": "When ground-fault protection of equipment is first installed, each level shall be performance tested to ensure compliance with 517.17(C). This testing shall be conducted by a qualified person(s) using a test process in accordance with the instruction provided with the equipment. A written record of this testing shall be made and shall be available to the authority having jurisdiction. [517.17_(D)](https://2023.antflix.net#517.17_(D))", + "displayTitle": "(D) Testing", + "children": [], + "url": "https://2023.antflix.net#517.17_(D)" + } + ], + "url": "https://2023.antflix.net#517.17" + }, + { + "displayTitle": "517.18 Category 2 Spaces", + "children": [ + { + "body": "Each patient bed location shall be supplied by at least two branch circuits, one from the critical branch and one from the normal system. All branch circuits from the normal system shall originate in the same panelboard. The electrical receptacles or the cover plate for the electrical receptacles supplied from the critical branch shall have a distinctive color or marking so as to be readily identifiable and shall also indicate the panelboard and branch-circuit number supplying them. Branch circuits serving patient bed locations shall not be part of a multiwire branch circuit. Exception No. 1: Branch circuits serving only special-purpose outlets or receptacles, such as portable X-ray outlets, shall not be required to be served from the same distribution panel or panels. Exception No. 2: The requirements of 517.18(A) shall not apply to patient bed locations in clinics, medical and dental offices, and outpatient facilities; psychiatric, substance abuse, and rehabilitation hospitals; sleeping rooms of nursing homes; and limited care facilities meeting the requirements of 517.10(B)(2). Exception No. 3: A Category 2 patient bed location served from two separate transfer switches on the critical branch shall not be required to have circuits from the normal system. Exception No. 4: Circuits served by Type 2 essential electrical systems shall be permitted to be fed by the equipment branch of the essential electrical system. [517.18_(A)](https://2023.antflix.net#517.18_(A))", + "displayTitle": "(A) Patient Bed Location", + "children": [], + "url": "https://2023.antflix.net#517.18_(A)" + }, + { + "displayTitle": "(B) Patient Bed Location Receptacles", + "children": [ + { + "body": "Each patient bed location shall be provided with a minimum of eight receptacles. [517.18_(B)_(1)](https://2023.antflix.net#517.18_(B)_(1))", + "displayTitle": "(1) Minimum Number and Supply", + "children": [], + "url": "https://2023.antflix.net#517.18_(B)_(1)" + }, + { + "body": "The receptacles required in 517.18(B)(1) shall be permitted to be of the single, duplex, or quadruplex type or any combination of the three. All receptacles shall be listed \"hospital grade\" and shall be so identified. The grounding terminal of each receptacle shall be connected to an insulated copper equipment grounding conductor sized in accordance with Table 250.122. Exception No. 1: The requirements of 517.18(B)(1) and (B)(2) shall not apply to psychiatric, substance abuse, and rehabilitation hospitals meeting the requirements of 517.10(B)(2). Exception No. 2: Psychiatric security rooms shall not be required to have receptacle outlets installed in the room. Informational Note: It is not intended that there be a total, immediate replacement of existing non-hospital grade receptacles. It is intended, however, that non-hospital grade receptacles be replaced with hospital grade receptacles upon modification of use, renovation, or as existing receptacles need replacement. [517.18_(B)_(2)](https://2023.antflix.net#517.18_(B)_(2))", + "displayTitle": "(2) Receptacle Requirements", + "children": [], + "url": "https://2023.antflix.net#517.18_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#517.18_(B)" + }, + { + "body": "Receptacles that are located within patient rooms, bathrooms, playrooms, and activity rooms of pediatric units or spaces with similar risk as determined by the health care facility's governing body by conducting a risk assessment, other than infant nurseries, shall be listed and identified as \"tamper resistant\" or shall employ a listed tamper-resistant cover. [99:6.3.2.2.1 (D)] [517.18_(C)](https://2023.antflix.net#517.18_(C))", + "displayTitle": "(C) Designated Category 2 Pediatric Locations", + "children": [], + "url": "https://2023.antflix.net#517.18_(C)" + } + ], + "url": "https://2023.antflix.net#517.18" + }, + { + "displayTitle": "517.19 Category 1 Spaces", + "children": [ + { + "body": "Each patient bed location shall be supplied by at least two branch circuits, one or more from the critical branch and one or more from the normal system. At least one branch circuit from the critical branch shall supply an outlet(s) only at that bed location. The electrical receptacles or the cover plates for the electrical receptacles supplied from the life safety and critical branches shall have a distinctive color or marking so as to be readily identifiable. [99:6.7.2.2.5(B)] All branch circuits from the normal system shall be from a single panelboard. Critical branch receptacles shall be identified and shall also indicate the panelboard and circuit number supplying them. Branch circuits serving patient bed locations shall not be part of a multiwire branch circuit. Exception No. 1: Branch circuits serving only special-purpose receptacles or equipment in Category 1 spaces shall be permitted to be served by other panelboards. Exception No. 2: Category 1 spaces served from two separate critical branch transfer switches shall not be required to have circuits from the normal system. [517.19_(A)](https://2023.antflix.net#517.19_(A))", + "displayTitle": "(A) Patient Bed Location Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#517.19_(A)" + }, + { + "displayTitle": "(B) Patient Bed Location Receptacles", + "children": [ + { + "body": "Each patient bed location shall be provided with a minimum of 14 receptacles, with at least one connected to either of the following: The normal system branch circuit required in 517.19(A)A critical branch circuit supplied by a different transfer switch than the other receptacles at the same patient bed location [517.19_(B)_(1)](https://2023.antflix.net#517.19_(B)_(1))", + "displayTitle": "(1) Minimum Number and Supply", + "children": [], + "url": "https://2023.antflix.net#517.19_(B)_(1)" + }, + { + "body": "The receptacles required in 517.19(B)(1) shall be permitted to be of the single, duplex, or quadruplex type or any combination of the three. All receptacles shall be listed \"hospital grade\" and shall be so identified. The grounding terminal of each receptacle shall be connected to the reference grounding point by means of an insulated copper equipment grounding conductor. [517.19_(B)_(2)](https://2023.antflix.net#517.19_(B)_(2))", + "displayTitle": "(2) Receptacle Requirements", + "children": [], + "url": "https://2023.antflix.net#517.19_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#517.19_(B)" + }, + { + "displayTitle": "(C) Operating Room Receptacles", + "children": [ + { + "body": "Each operating room shall be provided with a minimum of 36 receptacles divided between at least two branch circuits. At least 12 receptacles, but no more than 24, shall be connected to either of the following: The normal system branch circuit required in 517.19(A)A critical branch circuit supplied by a different transfer switch than the other receptacles at the same location [517.19_(C)_(1)](https://2023.antflix.net#517.19_(C)_(1))", + "displayTitle": "(1) Minimum Number and Supply", + "children": [], + "url": "https://2023.antflix.net#517.19_(C)_(1)" + }, + { + "body": "The receptacles shall be permitted to be of the locking or nonlocking type and of the single, duplex, or quadruplex types or any combination of the three. All nonlocking-type receptacles shall be listed hospital grade and so identified. The grounding terminal of each receptacle shall be connected to the reference grounding point by means of an insulated copper equipment grounding conductor. [517.19_(C)_(2)](https://2023.antflix.net#517.19_(C)_(2))", + "displayTitle": "(2) Receptacle Requirements", + "children": [], + "url": "https://2023.antflix.net#517.19_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#517.19_(C)" + }, + { + "body": "A patient care vicinity shall be permitted to have a patient equipment grounding point. The patient equipment grounding point, where supplied, shall be permitted to contain one or more listed grounding and bonding jacks. An equipment bonding jumper not smaller than 10 AWG shall be used to connect the grounding terminal of all grounding-type receptacles to the patient equipment grounding point. The bonding conductor shall be permitted to be arranged centrically or looped as convenient. Informational Note: Where there is no patient equipment grounding point, it is important that the distance between the reference grounding point and the patient care vicinity be as short as possible to minimize any potential differences. [517.19_(D)](https://2023.antflix.net#517.19_(D))", + "displayTitle": "(D) Patient Care Vicinity Grounding and Bonding (Optional)", + "children": [], + "url": "https://2023.antflix.net#517.19_(D)" + }, + { + "body": "Where a grounded electrical distribution system is used and metal feeder raceway or Type MC or MI cable that qualifies as an equipment grounding conductor in accordance with 250.118 is installed, grounding of enclosures and equipment, such as panelboards, switchboards, and switchgear, shall be ensured by one of the following bonding means at each termination or junction point of the metal raceway or Type MC or MI cable: A grounding bushing and a continuous copper bonding jumper, sized in accordance with 250.122, with the bonding jumper connected to the junction enclosure or the ground bus of the panelConnection of feeder raceways or Type MC or MI cable to threaded hubs or bosses on terminating enclosuresOther approved devices such as bonding-type locknuts or bushings. Standard locknuts shall not be used for bonding. [517.19_(E)](https://2023.antflix.net#517.19_(E))", + "displayTitle": "(E) Equipment Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#517.19_(E)" + }, + { + "body": "Isolated power systems shall be permitted to be used for Category 1 spaces, and, if used, the isolated power system equipment shall be listed as isolated power equipment. The isolated power system shall be designed and installed in accordance with 517.160. Exception: The audible and visual indicators of the line isolation monitor shall be permitted to be located at the nursing station for the area being served. [517.19_(F)](https://2023.antflix.net#517.19_(F))", + "displayTitle": "(F) Additional Protective Techniques in Category 1 Spaces (Optional)", + "children": [], + "url": "https://2023.antflix.net#517.19_(F)" + }, + { + "body": "Where an isolated ungrounded power source is used and limits the first-fault current to a low magnitude, the equipment grounding conductor associated with the secondary circuit shall be permitted to be run outside of the enclosure of the power conductors in the same circuit. Informational Note: Although it is permitted to run the equipment grounding conductor outside of the conduit, it is safer to run it with the power conductors to provide better protection in case of a second ground fault. [517.19_(G)](https://2023.antflix.net#517.19_(G))", + "displayTitle": "(G) Isolated Power System Equipment Grounding", + "children": [], + "url": "https://2023.antflix.net#517.19_(G)" + }, + { + "body": "The equipment grounding conductor for special-purpose receptacles, such as the operation of mobile X-ray equipment, shall be extended to the reference grounding points of branch circuits for all locations likely to be served from such receptacles. Where such a circuit is served from an isolated ungrounded system, the equipment grounding conductor shall not be required to be run with the power conductors; however, the equipment grounding terminal of the special-purpose receptacle shall be connected to the reference grounding point. [517.19_(H)](https://2023.antflix.net#517.19_(H))", + "displayTitle": "(H) Special-Purpose Receptacle Grounding", + "children": [], + "url": "https://2023.antflix.net#517.19_(H)" + } + ], + "url": "https://2023.antflix.net#517.19" + }, + { + "displayTitle": "517.20 Wet Procedure Locations", + "children": [ + { + "body": "Wet procedure locations shall be provided with special protection against electric shock. [99:6.3.2.3.1] This special protection shall be provided by one of the following:Isolated power systems that remain in operation in the event of a single line-to-ground fault condition that inherently limits the possible ground-fault current due to a first fault to a low value, without interrupting the power supplyInformational Note No. 1: Isolated power systems can eliminate the danger of electric shock to patients who might be more susceptible to leakage current and unable to move in their beds.Power distribution system in which the power supply is interrupted if the ground-fault current does, in fact, exceed the trip value of a Class A GFCIInformational Note No. 2: See Annex E of ANSI/UL 943-2018, Ground-Fault Circuit-Interrupters, and 110.3(B) for the manufacturers' installation instructions of listed ground-fault circuit interrupters for information on the supply connection of life-support equipment to circuits providing ground-fault circuit-interrupter (GFCI) protection of personnel at outlets.[99:6.3.2.3.2]Exception: Branch circuits supplying only listed, fixed, therapeutic, and diagnostic equipment shall be permitted to be supplied from a grounded service, single- or 3-phase system if the following conditions are met:Wiring for grounded and isolated circuits does not occupy the same raceway.All conductive surfaces of the equipment are connected to an insulated copper equipment grounding conductor. [517.20_(A)](https://2023.antflix.net#517.20_(A))", + "displayTitle": "(A) Receptacles and Fixed Equipment", + "children": [], + "url": "https://2023.antflix.net#517.20_(A)" + }, + { + "body": "Where an isolated power system is utilized, the isolated power equipment shall be listed as isolated power equipment, and the isolated power system shall be designed and installed in accordance with 517.160. Informational Note: See Part IV of Article 680 for requirements on the installation of therapeutic pools and tubs. [517.20_(B)](https://2023.antflix.net#517.20_(B))", + "displayTitle": "(B) Isolated Power Systems", + "children": [], + "url": "https://2023.antflix.net#517.20_(B)" + } + ], + "url": "https://2023.antflix.net#517.20" + }, + { + "body": "Receptacles shall not be required in bathrooms or toilet rooms. [99:6.3.2.2.2(D)] Receptacles located in patient bathrooms and toilet rooms in Category 2 spaces shall have ground-fault circuit-interrupter protection in accordance with 210.8(B)(1). Ground-fault circuit-interrupter protection for personnel shall not be required for receptacles installed in those Category 2 and Category 1 spaces where a basin, sink, or other similar plumbing fixture is installed in the patient bed location. Informational Note: See ANSI/UL 943-2018, Ground-Fault Circuit-Interrupters, Annex E, and, in accordance with 110.3(B), the manufacturers' installation instructions of listed ground-fault circuit interrupters for information on the supply connection of life-support equipment to circuits providing ground-fault circuit-interrupter (GFCI) protection of personnel at outlets. [517.21](https://2023.antflix.net#517.21)", + "displayTitle": "517.21 Ground-Fault Circuit-Interrupter Protection for Personnel in Category 2 and Category 1 Spaces", + "children": [], + "url": "https://2023.antflix.net#517.21" + }, + { + "body": "Demand factors for receptacle loads supplied by branch circuits not exceeding 150 volts to ground and installed in Category 1, Category 2, Category 3, and Category 4 patient care spaces shall be in accordance with 220.110. Informational Note: See Article 100 for the definitions of patient care space categories. [517.22](https://2023.antflix.net#517.22)", + "displayTitle": "517.22 Demand Factors", + "children": [], + "url": "https://2023.antflix.net#517.22" + }, + { + "displayTitle": "Part III Essential Electrical System (EES)", + "children": [], + "url": "https://2023.antflix.net#divider_69_III" + }, + { + "body": "Type 1 and Type 2 essential electrical systems (EES) for health care facilities shall comprise separate branches capable of supplying a limited amount of lighting and power service, which is considered essential for life safety and orderly cessation of procedures during the time normal electrical service is interrupted for any reason. Informational Note: See NFPA 99-2021, Health Care Facilities Code, for information on essential electrical systems. [517.25](https://2023.antflix.net#517.25)", + "displayTitle": "517.25 Essential Electrical Systems for Health Care Facilities", + "children": [], + "url": "https://2023.antflix.net#517.25" + }, + { + "body": "The life safety branch of the essential electrical system shall meet the requirements of Article 700, except as amended as follows: Section 700.4 shall not apply.Section 700.10(D) shall not apply.Section 700.17 shall be replaced with the following: Branch circuits that supply emergency lighting shall be installed to provide service from a source in accordance with 700.12 when normal supply for lighting is interrupted or where single circuits supply luminaires containing secondary batteries.Section 700.32 shall not apply.Informational Note No. 1: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, for additional information.Informational Note No. 2: See 517.29 and NFPA 99-2021, Health Care Facilities Code, for additional information. [517.26](https://2023.antflix.net#517.26)", + "displayTitle": "517.26 Application of Other Articles", + "children": [], + "url": "https://2023.antflix.net#517.26" + }, + { + "body": "Informational Note: Type 1 essential electrical systems are comprised of three separate branches capable of supplying a limited amount of lighting and power service that is considered essential for life safety and effective facility operation during the time the normal electrical service is interrupted for any reason. These three separate branches are the life safety, critical, and equipment branches. [99:A.6.7.2.3] [517.29](https://2023.antflix.net#517.29)", + "displayTitle": "517.29 Type 1 Essential Electrical Systems", + "children": [ + { + "body": "The requirements of 517.29 through 517.35 shall apply to Type 1 essential electrical systems. Type 1 systems shall be required for Category 1 spaces. Type 1 systems shall be permitted to serve Category 2, Category 3, and Category 4 spaces. Informational Note No. 1: See NFPA 99-2021, Health Care Facilities Code, for performance, maintenance, and testing requirements of essential electrical systems in hospitals. See NFPA 20-2019, Standard for the Installation of Stationary Pumps for Fire Protection, for installation of centrifugal fire pumps. Informational Note No. 2: See NFPA 99-2021, Health Care Facilities Code, 6.7.5 and 6.7.6, for additional information on Type 1 and Type 2 essential electrical systems. [517.29_(A)](https://2023.antflix.net#517.29_(A))", + "displayTitle": "(A) Applicability", + "children": [], + "url": "https://2023.antflix.net#517.29_(A)" + }, + { + "body": "Category I spaces shall be served by a Type 1 essential electrical system. [99:6.4.1] Category 1 spaces shall not be served by a Type 2 EES. [99:6.4.2] [517.29_(B)](https://2023.antflix.net#517.29_(B))", + "displayTitle": "(B) Type 1 Essential Electrical Systems", + "children": [], + "url": "https://2023.antflix.net#517.29_(B)" + } + ], + "url": "https://2023.antflix.net#517.29" + }, + { + "displayTitle": "517.30 Sources of Power", + "children": [ + { + "body": "Essential electrical systems (EES) shall have two or more independent sources (or sets of sources). One on-site source (or sets of sources) shall be sized to supply the entire EES. The other independent source (or sets of sources) shall be sized to supply the entire EES and shall be permitted to be located on-site or off-site. Additional sources other than the first two independent sources shall be permitted to be sized to supply the intended load. Informational Note: An example of a set of sources may be several generators that combined serve the entire EES. [517.30_(A)](https://2023.antflix.net#517.30_(A))", + "displayTitle": "(A) Two Independent Power Sources", + "children": [], + "url": "https://2023.antflix.net#517.30_(A)" + }, + { + "body": "Power sources for the EES shall be permitted to be any of those specified in 517.30(B)(1) through (B)(5). [517.30_(B)](https://2023.antflix.net#517.30_(B))", + "displayTitle": "(B) Power Sources for the EES", + "children": [ + { + "body": "Where utility power is used as the normal source, utility power shall not be used as the alternate source unless permitted elsewhere in this article. Informational Note: See 517.35 and 517.45 for essential system loads that can be supplied from dual sources of utility supply power. [517.30_(B)_(1)](https://2023.antflix.net#517.30_(B)_(1))", + "displayTitle": "(1) Utility Supply Power", + "children": [], + "url": "https://2023.antflix.net#517.30_(B)_(1)" + }, + { + "displayTitle": "(2) Generating Units", + "children": [], + "url": "https://2023.antflix.net#517.30_(B)_(2)" + }, + { + "body": "Fuel cell systems shall be permitted to serve as the alternate power source for all or part of an EES. [99:6.7.1.5.1] Installation of fuel cells shall comply with the requirements in Parts I through VII of Article 692 for 1000 volts or less and Part VIII for over 1000 volts.N + 1 units shall be provided where N units have sufficient capacity to supply the demand load of the portion of the system served.Systems shall be able to assume loads within 10 seconds of loss of normal power source.Systems shall have a continuing source of fuel supply, together with sufficient on-site fuel storage for the essential system type.Where life safety and critical portions of the distribution system are present, a connection shall be provided for a portable diesel generator.Informational Note: See NFPA 853-2020, Standard for the Installation of Stationary Fuel Cell Power Systems, for information on installation of stationary fuel cells. [517.30_(B)_(3)](https://2023.antflix.net#517.30_(B)_(3))", + "displayTitle": "(3) Fuel Cell Systems", + "children": [], + "url": "https://2023.antflix.net#517.30_(B)_(3)" + }, + { + "body": "Energy storage systems shall be permitted to serve as the alternate source for all or part of an EES. Informational Note: See NFPA 111-2022, Standard on Stored Electrical Energy Emergency and Standby Power Systems, for information on the installation of energy storage systems. [517.30_(B)_(4)](https://2023.antflix.net#517.30_(B)_(4))", + "displayTitle": "(4) Energy Storage Systems", + "children": [], + "url": "https://2023.antflix.net#517.30_(B)_(4)" + }, + { + "body": "EES shall be permitted to be supplied by a health care microgrid that also supplies nonessential loads. The health care microgrid shall be permitted to share distributed resources with the normal system. Health care microgrid systems shall be designed with sufficient reliability to provide effective facility operation consistent with the facility emergency operations plan. Health care microgrid system components shall not be compromised by failure of the normal source. Informational Note: See NFPA 99-2021, Health Care Facilities Code, for information on health care microgrids. [517.30_(B)_(5)](https://2023.antflix.net#517.30_(B)_(5))", + "displayTitle": "(5) Health Care Microgrid", + "children": [], + "url": "https://2023.antflix.net#517.30_(B)_(5)" + } + ], + "url": "https://2023.antflix.net#517.30_(B)" + }, + { + "body": "EES components shall be located to minimize interruptions caused by natural forces common to the area (e.g., storms, floods, earthquakes, or hazards created by adjoining structures or activities). [99:6.2.4.1] [517.30_(C)](https://2023.antflix.net#517.30_(C))", + "displayTitle": "(C) Location of EES Components", + "children": [ + { + "body": "Installation of electrical service distribution equipment shall be located to reduce possible interruption of normal electrical services resulting from natural or manmade causes as well as internal wiring and equipment failures. [517.30_(C)_(1)](https://2023.antflix.net#517.30_(C)_(1))", + "displayTitle": "(1) Services", + "children": [], + "url": "https://2023.antflix.net#517.30_(C)_(1)" + }, + { + "body": "Feeders shall be located to provide physical separation of the feeders of the alternate source and from the feeders of the normal electrical source to prevent possible simultaneous interruption. [99:6.2.4.3] Informational Note: Facilities in which the normal source of power is supplied by two or more separate central station-fed services experience greater than normal electrical service reliability than those with only a single feed. Such a dual source of normal power consists of two or more electrical services fed from separate generator sets or a utility distribution network that has multiple power input sources and is arranged to provide mechanical and electrical separation so that a fault between the facility and the generating sources is not likely to cause an interruption of more than one of the facility service feeders. [517.30_(C)_(2)](https://2023.antflix.net#517.30_(C)_(2))", + "displayTitle": "(2) Feeders", + "children": [], + "url": "https://2023.antflix.net#517.30_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#517.30_(C)" + } + ], + "url": "https://2023.antflix.net#517.30" + }, + { + "displayTitle": "517.31 Requirements for the Essential Electrical System", + "children": [ + { + "body": "Type 1 essential electrical systems shall be comprised of three separate branches capable of supplying a limited amount of lighting and power service that is considered essential for life safety and effective hospital operation during the time the normal electrical service is interrupted for any reason. The three branches are life safety, critical, and equipment. The division between the branches shall occur at transfer switches where more than one transfer switch is required. [99:6.7.2.3.1] [517.31_(A)](https://2023.antflix.net#517.31_(A))", + "displayTitle": "(A) Separate Branches", + "children": [], + "url": "https://2023.antflix.net#517.31_(A)" + }, + { + "body": "Transfer switches shall be in accordance with one of the following: The number of transfer switches to be used shall be based on reliability and design. Each branch of the essential electrical system shall have one or more transfer switches.One transfer switch shall be permitted to serve one or more branches in a facility with a continuous load on the switch of 150 kVA (120 kW) or less. [99:6.7.6.2.1.4]Informational Note No. 1: See NFPA 99-2021, Health Care Facilities Code, 6.7.3.1, 6.7.2.2.5, 6.7.2.2.5.15, and 6.7.2.2.7, for more information on transfer switches.Informational Note No. 2: See Informational Note Figure 517.31(B)(1).Informational Note Figure 517.31(B)(1) Type 1 Essential Electrical System - Minimum Requirement (Greater Than 150 kVA) for Transfer Switch Arrangement.Informational Note Figure 517.31(B)(2) Type 1 Essential Electrical System - Minimum Requirement (150 kVA or Less) for Transfer Switch Arrangement.Informational Note No. 3: See Informational Note Figure 517.31(B)(2). [517.31_(B)](https://2023.antflix.net#517.31_(B))", + "displayTitle": "(B) Transfer Switches", + "children": [ + { + "body": "Loads served by the generating equipment not specifically named in this article shall be served by their own transfer switches such that the following conditions apply: These loads shall not be transferred if the transfer will overload the generating equipment.These loads shall be automatically shed upon generating equipment overloading. [517.31_(B)_(1)](https://2023.antflix.net#517.31_(B)_(1))", + "displayTitle": "(1) Optional Loads", + "children": [], + "url": "https://2023.antflix.net#517.31_(B)_(1)" + }, + { + "body": "Hospital power sources and alternate power sources shall be permitted to serve the essential electrical systems of contiguous or same-site facilities. [517.31_(B)_(2)](https://2023.antflix.net#517.31_(B)_(2))", + "displayTitle": "(2) Contiguous Facilities", + "children": [], + "url": "https://2023.antflix.net#517.31_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#517.31_(B)" + }, + { + "displayTitle": "(C) Wiring Requirements", + "children": [ + { + "body": "The life safety branch and critical branch [of the essential electrical system] shall be kept independent of all other wiring and equipment. [99:6.7.5.2.1] Raceways, cables, or enclosures of the life safety and critical branch shall be readily identified as components of the essential electrical system (EES). Boxes and enclosures (including transfer switches, generators, and power panels) shall be field- or factory-marked and identified as components of the EES. Raceways and cables shall be field- or factory-marked as components of the EES at intervals not to exceed 7.6 m (25 ft).Conductors of the life safety branch or critical branch shall not enter the same raceways, boxes, or cabinets with each other or any other wiring system. Branch conductors shall be permitted to occupy common equipment, raceways, boxes, or cabinets of other circuits not part of the life safety branch and critical branch where such wiring complies with one of the following:Is in transfer equipment enclosuresIs in exit or emergency luminaires supplied from two sourcesIs in a common junction box attached to exit or emergency luminaires supplied from two sourcesIs for two or more circuits supplied from the same branch and same transfer switchThe wiring of the equipment branch shall be permitted to occupy the same raceways, boxes, or cabinets of other circuits that are not part of the essential electrical system.Where Category 2 locations are served from two separate transfer switches on the essential electrical system in accordance with 517.18(A), Exception No. 3, the Category 2 circuits from the two separate systems shall be kept independent of each other.Where Category 1 locations are served from two separate transfer switches on the essential electrical system in accordance with 517.19(A), Exception No. 2, the critical care circuits from the two separate systems shall be kept independent of each other. [517.31_(C)_(1)](https://2023.antflix.net#517.31_(C)_(1))", + "displayTitle": "(1) Separation From Other Circuits", + "children": [], + "url": "https://2023.antflix.net#517.31_(C)_(1)" + }, + { + "body": "Where isolated power systems are installed in any of the areas in 517.34(A)(1) and (A)(2), each system shall be supplied by an individual circuit serving no other load. [517.31_(C)_(2)](https://2023.antflix.net#517.31_(C)_(2))", + "displayTitle": "(2) Isolated Power Systems", + "children": [], + "url": "https://2023.antflix.net#517.31_(C)_(2)" + }, + { + "body": "The wiring of the life safety and critical branches shall be mechanically protected by raceways. Where installed as branch circuits in patient care spaces, the installation shall comply with the requirements of 517.13(A) and (B) and 250.118. Only the following wiring methods shall be permitted:Nonflexible metal raceways, Type MI cable, RTRC marked with the suffix \u2014XW, or Schedule 80 PVC conduit. Nonmetallic raceways shall not be used for branch circuits that supply patient care spaces.Where encased in not less than 50 mm (2 in.) of concrete, Schedule 40 PVC conduit, flexible nonmetallic or jacketed metallic raceways, or jacketed metallic cable assemblies listed for installation in concrete. Nonmetallic raceways shall not be used for branch circuits that supply patient care spaces.Listed flexible metal raceways and listed metal sheathed cable assemblies, as follows:Where used in listed prefabricated medical headwallsIn listed office furnishingsWhere fished into existing walls or ceilings, not otherwise accessible and not subject to physical damageWhere necessary for flexible connection to equipmentFor equipment that requires a flexible connection due to movement, vibration, or operationLuminaires installed in ceiling structuresFlexible power cords of appliances or other utilization equipment connected to the essential electrical system.Cables for Class 2 or Class 3 systems permitted in Part VI of this article, with or without raceways.Informational Note: See 517.13 for additional grounding requirements in patient care areas. [517.31_(C)_(3)](https://2023.antflix.net#517.31_(C)_(3))", + "displayTitle": "(3) Mechanical Protection of the Essential Electrical System", + "children": [], + "url": "https://2023.antflix.net#517.31_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#517.31_(C)" + }, + { + "body": "The essential electrical system shall have the capacity and rating to meet the maximum actual demand likely to be produced by the connected load. Feeders shall be sized in accordance with 215.2 and Part III of Article 220. The alternate power source(s) required in 517.30 shall have the capacity and rating to meet the demand produced by the load at any given time. Demand calculations for sizing of the alternate power source(s) shall be based on any of the following:Prudent demand factors and historical dataConnected loadFeeder calculationsAny combination of the aboveThe sizing requirements in 700.4 and 701.4 shall not apply to alternate sources. [517.31_(D)](https://2023.antflix.net#517.31_(D))", + "displayTitle": "(D) Capacity of Systems", + "children": [], + "url": "https://2023.antflix.net#517.31_(D)" + }, + { + "body": "The electrical receptacles or the cover plates for the electrical receptacles supplied from the life safety and critical branches shall have a distinctive color or marking so as to be readily identifiable. [99:6.7.2.2.5(B)] [517.31_(E)](https://2023.antflix.net#517.31_(E))", + "displayTitle": "(E) Receptacle Identification", + "children": [], + "url": "https://2023.antflix.net#517.31_(E)" + }, + { + "body": "A single feeder supplied by a local or remote alternate power source shall be permitted to supply the essential electrical system to the point at which the life safety, critical, and equipment branches are separated. Installation of the transfer equipment shall be permitted at other than the location of the alternate power source. [517.31_(F)](https://2023.antflix.net#517.31_(F))", + "displayTitle": "(F) Feeders From Alternate Power Source", + "children": [], + "url": "https://2023.antflix.net#517.31_(F)" + }, + { + "body": "Overcurrent protective devices serving the essential electrical system shall be coordinated for the period of time that a fault's duration extends beyond 0.1 second. Exception No. 1: Coordination shall not be required between transformer primary and secondary overcurrent protective devices where only one overcurrent protective device or set of overcurrent protective devices exists on the transformer secondary. Exception No. 2: Coordination shall not be required between overcurrent protective devices of the same size (ampere rating) in series. Informational Note No. 1: The terms coordination and coordinated as used in this section do not cover the full range of overcurrent conditions. Informational Note No. 2: See 517.17(C) for information on requirements for the coordination of ground-fault protection. [517.31_(G)](https://2023.antflix.net#517.31_(G))", + "displayTitle": "(G) Coordination", + "children": [], + "url": "https://2023.antflix.net#517.31_(G)" + } + ], + "url": "https://2023.antflix.net#517.31" + }, + { + "displayTitle": "517.32 Branches Requiring Automatic Connection", + "children": [ + { + "body": "Those functions of patient care depending on lighting or appliances that are connected to the essential electrical system shall be divided into the life safety branch and the critical branch, as described in 517.33 and 517.34. [517.32_(A)](https://2023.antflix.net#517.32_(A))", + "displayTitle": "(A) Life Safety and Critical Branch Used in a Type 1 EES", + "children": [], + "url": "https://2023.antflix.net#517.32_(A)" + }, + { + "body": "The life safety and critical branches shall be installed and connected to the alternate power source specified in 517.41(A) and (B) so that all functions specified herein for the life safety and critical branches are automatically restored to operation within 10 seconds after interruption of the normal source. [99:6.7.5.3.1] [517.32_(B)](https://2023.antflix.net#517.32_(B))", + "displayTitle": "(B) Life Safety and Critical Branch Used in a Type 2 EES", + "children": [], + "url": "https://2023.antflix.net#517.32_(B)" + } + ], + "url": "https://2023.antflix.net#517.32" + }, + { + "body": "The life safety branch shall be limited to circuits essential to life safety. [99:6.7.5.1.2.3] No functions other than those listed in 517.33(A) through (H) shall be connected to the life safety branch. The life safety branch shall supply power as follows: [517.33](https://2023.antflix.net#517.33)", + "displayTitle": "517.33 Life Safety Branch", + "children": [ + { + "body": "Illumination of means of egress such as lighting required for corridors, passageways, stairways, and landings at exit doors, and all necessary ways of approach to exits. Switching arrangements to transfer patient corridor lighting in hospitals from general illumination circuits to night illumination circuits shall be permitted, if only one of two circuits can be selected and both circuits cannot be extinguished at the same time. Informational Note: See NFPA 101-2021, Life Safety Code, Sections 7.8 and 7.9. [517.33_(A)](https://2023.antflix.net#517.33_(A))", + "displayTitle": "(A) Illumination of Means of Egress", + "children": [], + "url": "https://2023.antflix.net#517.33_(A)" + }, + { + "body": "Exit signs and exit directional signs. Informational Note: See NFPA 101-2021, Life Safety Code, Section 7.10. [517.33_(B)](https://2023.antflix.net#517.33_(B))", + "displayTitle": "(B) Exit Signs", + "children": [], + "url": "https://2023.antflix.net#517.33_(B)" + }, + { + "body": "Alarm and alerting systems including the following: Fire alarm systemsAlarm and alerting systems (other than fire alarm systems) shall be connected to the life safety branch or critical branch. [99:6.7.5.1.2.5]Alarms for systems used for the piping of nonflammable medical gasesMechanical, control, and other accessories required for effective life safety systems operation shall be permitted to be connected to the life safety branch. [517.33_(C)](https://2023.antflix.net#517.33_(C))", + "displayTitle": "(C) Alarm and Alerting Systems", + "children": [], + "url": "https://2023.antflix.net#517.33_(C)" + }, + { + "body": "Hospital communications systems, where used for issuing instructions during emergency conditions. [99:6.7.5.1.2.4(3)] [517.33_(D)](https://2023.antflix.net#517.33_(D))", + "displayTitle": "(D) Communications Systems", + "children": [], + "url": "https://2023.antflix.net#517.33_(D)" + }, + { + "body": "Generator set locations as follows: Task illuminationBattery charger for emergency battery-powered lighting unit(s)Select receptacles at the generator set location and essential electrical system transfer switch locations [99:6.7.5.1.2.4(4)] [517.33_(E)](https://2023.antflix.net#517.33_(E))", + "displayTitle": "(E) Generator Set Locations", + "children": [], + "url": "https://2023.antflix.net#517.33_(E)" + }, + { + "body": "Loads dedicated to a specific generator, including the fuel transfer pump(s), ventilation fans, electrically operated louvers, controls, cooling system, and other generator accessories essential for generator operation, shall be connected to the life safety branch or to the output terminals of the generator with overcurrent protective devices. [99:6.7.5.1.2.6] [517.33_(F)](https://2023.antflix.net#517.33_(F))", + "displayTitle": "(F) Generator Set Accessories", + "children": [], + "url": "https://2023.antflix.net#517.33_(F)" + }, + { + "body": "Elevator cab lighting, control, communications, and signal systems. [99:6.7.5.1.2.4(5)] [517.33_(G)](https://2023.antflix.net#517.33_(G))", + "displayTitle": "(G) Elevators", + "children": [], + "url": "https://2023.antflix.net#517.33_(G)" + }, + { + "body": "Electrically powered doors used for building egress. [99:6.7.5.1.2.4(6)] [517.33_(H)](https://2023.antflix.net#517.33_(H))", + "displayTitle": "(H) Automatic Doors", + "children": [], + "url": "https://2023.antflix.net#517.33_(H)" + } + ], + "url": "https://2023.antflix.net#517.33" + }, + { + "displayTitle": "517.34 Critical Branch", + "children": [ + { + "body": "The critical branch shall supply power for task illumination, fixed equipment, select receptacles, and select power circuits serving the following spaces and functions related to patient care: Category 1 spaces where deep sedation or general anesthesia is administered, task illumination, select receptacles, and fixed equipmentTask illumination and select receptacles in the following:Patient care spaces, including infant nurseries, selected acute nursing areas, psychiatric bed areas (omit receptacles), and ward treatment roomsMedication preparation spacesPharmacy dispensing spacesNurses' stations - unless adequately lighted by corridor luminairesAdditional specialized patient care task illumination and receptacles, where neededNurse call systemsBlood, bone, and tissue banksTelecommunications entrance facility, telecommunications equipment rooms, and telecommunication rooms and equipment in these roomsTask illumination, select receptacles, and select power circuits for the following areas:Category 1 or 2 spaces with at least one duplex receptacle per patient bed location, and task illumination as required by the governing body of the health care facilityAngiographic labsCardiac catheterization labsCoronary care unitsHemodialysis rooms or areasEmergency room treatment areas (select)Human physiology labsIntensive care unitsPostoperative recovery rooms (select)Clinical IT-network equipmentWireless phone and paging equipment for clinical staff communicationsAdditional task illumination, receptacles, and select power circuits needed for effective facility operation, including single-phase fractional horsepower motors, which are permitted to be connected to the critical branch[99:6.7.5.1.3.2] [517.34_(A)](https://2023.antflix.net#517.34_(A))", + "displayTitle": "(A) Task Illumination, Fixed Equipment, and Select Receptacles", + "children": [], + "url": "https://2023.antflix.net#517.34_(A)" + }, + { + "body": "It shall be permitted to control task illumination on the critical branch. [517.34_(B)](https://2023.antflix.net#517.34_(B))", + "displayTitle": "(B) Switching", + "children": [], + "url": "https://2023.antflix.net#517.34_(B)" + }, + { + "body": "The critical branch shall be permitted to be subdivided into two or more branches. [99:6.7.5.1.3.1] Informational Note: It is important to analyze the consequences of supplying an area with only critical branch power when failure occurs between the area and the transfer switch. Some proportion of normal and critical power or critical power from separate transfer switches might be appropriate. [517.34_(C)](https://2023.antflix.net#517.34_(C))", + "displayTitle": "(C) Subdivision of the Critical Branch", + "children": [], + "url": "https://2023.antflix.net#517.34_(C)" + } + ], + "url": "https://2023.antflix.net#517.34" + }, + { + "body": "The equipment branch shall be installed and connected to the alternate power source such that the equipment described in 517.35(A) is automatically restored to operation at appropriate time-lag intervals following the energizing of the life safety and critical branches. [99:6.7.5.1.4.2(A)] The arrangement of the connection to the alternate power source shall also provide for the subsequent connection of equipment described in 517.35(B). [99:6.7.5.1.4.2(B)] Exception: For essential electrical systems under 150 kVA, deletion of the time-lag intervals feature for delayed automatic connection to the equipment system shall be permitted. [517.35](https://2023.antflix.net#517.35)", + "displayTitle": "517.35 Equipment Branch Connection to Alternate Power Source", + "children": [ + { + "body": "The following equipment shall be permitted to be arranged for delayed automatic connection to the alternate power source: Central suction systems serving medical and surgical functions, including controls, with such suction systems permitted to be placed on the critical branchSump pumps and other equipment required to operate for the safety of major apparatus, including associated control systems and alarmsCompressed air systems serving medical and surgical functions, including controls with such air systems permitted to be placed on the critical branchSmoke control and stair pressurization systemsKitchen hood supply or exhaust systems, or both, if required to operate during a fire in or under the hoodSupply, return, and exhaust ventilating systems for the following:Airborne infectious/isolation roomsProtective environment roomsExhaust fans for laboratory fume hoodsNuclear medicine areas where radioactive material is usedEthylene oxide evacuationAnesthetic evacuation[99:6.7.5.1.4.3(A)]Where delayed automatic connection is not appropriate, the ventilation systems specified in 517.35(A)(6) shall be permitted to be placed on the critical branch. [99:6.7.5.1.4.3(B)]Supply, return, and exhaust ventilating systems for operating and delivery roomsSupply, return, exhaust ventilating systems and/or air-conditioning systems serving telephone equipment rooms and closets and data equipment rooms and closetsException: Sequential delayed automatic connection to the alternate power source to prevent overloading the generator shall be permitted where engineering studies indicate it is necessary. [517.35_(A)](https://2023.antflix.net#517.35_(A))", + "displayTitle": "(A) Equipment for Delayed Automatic Connection", + "children": [], + "url": "https://2023.antflix.net#517.35_(A)" + }, + { + "body": "The following equipment shall be permitted to be arranged for either delayed automatic or manual connection to the alternate power source: Heating equipment to provide heating for operating, delivery, labor, recovery, intensive care, coronary care, nurseries, infection/isolation rooms, emergency treatment spaces, and general patient rooms and pressure maintenance (jockey or make-up) pump(s) for water-based fire protection systemsException: Healing of general patient rooms and infection/isolation rooms during disruption of the normal source shall not be required under any of the following conditions:The outside design temperature is higher than \u20146.7\u00b0C (20\u00b0F).The outside design temperature is lower than \u20146.7\u00b0C (20\u00b0F), and where a selected room(s) is provided for the needs of all confined patients, only such room(s) need be heated.The facility is served by a dual source of normal power.Informational Note No. 1: The design temperature is based on the 97.5 percent design value as shown in Chapter 24 of the ASHRAE Handbook of Fundamentals (2013).Informational Note No. 2: See 517.30(C) for a description of a dual source of normal power.An elevator(s) selected to provide service to patient, surgical, obstetrical, and ground floors during interruption of normal power. In instances where interruption of normal power would result in other elevators stopping between floors, throw-over facilities shall be provided to allow the temporary operation of any elevator for the release of patients or other persons who may be confined between floors.Hyperbaric facilities.Hypobaric facilities.Automatically operated doors.Minimal electrically heated autoclaving equipment shall be permitted to be arranged for either automatic or manual connection to the alternate source.Controls for equipment listed in 517.35.Other selected equipment shall be permitted to be served by the equipment system. [99:6.7.5.1.4.4] [517.35_(B)](https://2023.antflix.net#517.35_(B))", + "displayTitle": "(B) Equipment for Delayed Automatic or Manual Connection", + "children": [], + "url": "https://2023.antflix.net#517.35_(B)" + } + ], + "url": "https://2023.antflix.net#517.35" + }, + { + "body": "Informational Note No. 1: Nursing homes and other limited care facilities can contain Category 1 and/or Category 2 patient care spaces, depending on the design and type of care administered in the facility. For Category 1 spaces, see 517.29 through 517.35. For Category 2 spaces not served by Type 1 essential electrical systems, see 517.40 through 517.44. Informational Note No. 2: Type 2 essential electrical systems are comprised of two separate branches capable of supplying a limited amount of lighting and power service that is considered essential for the protection of life and safety and effective operation of the institution during the time normal electrical service is interrupted for any reason. These two separate branches are the life safety and equipment branches. The number of transfer switches to be used should be based upon reliability, design, and load considerations. Each branch of the essential electrical system should have one or more transfer switches. One transfer switch should be permitted to serve one or more branches in a facility with a maximum demand on the essential electrical system of 150 kVA (120 kW). [99:A.6.7.6.2.1] [517.40](https://2023.antflix.net#517.40)", + "displayTitle": "517.40 Type 2 Essential Electrical Systems", + "children": [ + { + "body": "The requirements of 517.40(C) through 517.44 shall apply to Category 2 spaces. Exception: The requirements of 517.40(C) through 517.44 shall not apply to freestanding buildings used as nursing homes and limited care facilities if the following apply: (1) Admitting and discharge policies are maintained that preclude the provision of care for any patient or resident who might need to be sustained by electrical life-support equipment. (2) No surgical treatment requiring general anesthesia is offered. (3) An automatic battery-operated system(s) or equipment shall be effective for at least 11/2 hours and is otherwise in accordance with 700.12 and that shall be capable of supplying lighting for exit lights, exit corridors, stairways, nursing stations, medical preparation areas, boiler rooms, and communications areas. This system shall also supply power to operate all alarm systems. Informational Note: See NFPA 101-2021, Life Safety Code. [517.40_(A)](https://2023.antflix.net#517.40_(A))", + "displayTitle": "(A) Applicability", + "children": [], + "url": "https://2023.antflix.net#517.40_(A)" + }, + { + "body": "For those nursing homes and limited care facilities that admit patients who need to be sustained by electrical life-support equipment, the essential electrical system from the source to the portion of the facility where such patients are treated shall comply with the requirements of 517.29 through 517.35. [517.40_(B)](https://2023.antflix.net#517.40_(B))", + "displayTitle": "(B) Category 1 Spaces in Inpatient Hospital Care Facilities", + "children": [], + "url": "https://2023.antflix.net#517.40_(B)" + }, + { + "body": "Nursing homes and limited care facilities that are contiguous or located on the same site with a hospital shall be permitted to have their essential electrical systems supplied by the hospital. [517.40_(C)](https://2023.antflix.net#517.40_(C))", + "displayTitle": "(C) Facilities Contiguous or Located on the Same Site With Hospitals", + "children": [], + "url": "https://2023.antflix.net#517.40_(C)" + } + ], + "url": "https://2023.antflix.net#517.40" + }, + { + "displayTitle": "517.41 Required Power Sources", + "children": [ + { + "body": "Essential electrical systems (EES) shall have two or more independent sources (or sets of sources). One on-site source (or sets of sources) shall be sized to supply the entire EES. The other independent source (or sets of sources) shall be sized to supply the entire EES and shall be permitted to be located on-site or off-site. Additional sources other than the first two independent sources shall be permitted to be sized to supply the intended load. Informational Note: An example of a set of sources may be several generators that combined serve the entire EES. [517.41_(A)](https://2023.antflix.net#517.41_(A))", + "displayTitle": "(A) Independent Power Sources", + "children": [], + "url": "https://2023.antflix.net#517.41_(A)" + }, + { + "body": "EES components shall be located to minimize interruptions caused by natural forces common to the area (e.g., storms, floods, earthquakes, or hazards created by adjoining structures or activities). [99:6.2.4.1] Installations of electrical services shall be located to reduce possible interruption of normal electrical services resulting from similar causes as well as possible disruption of normal electrical service due to internal wiring and equipment failures. [99:6.2.4.2] Feeders shall be located to provide physical separation of the feeders of the alternate source and from the feeders of the normal electrical source to prevent possible simultaneous interruption. [99:6.2.4.3] [517.41_(B)](https://2023.antflix.net#517.41_(B))", + "displayTitle": "(B) Location of EES Components", + "children": [], + "url": "https://2023.antflix.net#517.41_(B)" + } + ], + "url": "https://2023.antflix.net#517.41" + }, + { + "displayTitle": "517.42 Essential Electrical Systems for Nursing Homes and Limited Care Facilities", + "children": [ + { + "body": "The [Type 2] essential electrical system shall be divided into the following two branches: Life safety branchEquipment branch [99:6.7.6.2.1.2]The division between the branches shall occur at transfer switches where more than one transfer switch is required. [99:6.7.2.2.1]Informational Note No. 1: Type 2 essential electrical systems are comprised of two separate branches capable of supplying a limited amount of lighting and power service that is considered essential for the protection of life and safety and effective operation of the institution during the time normal electrical service is interrupted for any reason. These two separate branches are the life safety and equipment branches. [99:A.6.7.6.2.1]Informational Note No. 2: The number of transfer switches to be used should be based upon reliability, design, and load considerations. Each branch of the essential electrical system should have one or more transfer switches. One transfer switch should be permitted to serve one or more branches in a facility with a maximum demand on the essential electrical system of 150 kVA (120 kW). [99:A.6.7.6.2.1]Informational Note No. 3: See NFPA 99-2021, Health Care Facilities Code, 6.7.2.2, for more information. [517.42_(A)](https://2023.antflix.net#517.42_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#517.42_(A)" + }, + { + "body": "The number of transfer switches to be used shall be based upon reliability, design, and load considerations. [99:6.7.2.2.3] Transfer switches shall be in accordance with one of the following:Each branch of the essential electrical system shall have one or more transfer switches. [99:6.7.2.2.3.1]One transfer switch shall be permitted to serve one or more branches in a facility with a continuous load on the switch of 150 kVA (120 kW) or less. [99:6.7.2.2.3.2]Informational Note No. 1: See NFPA 99-2021, Health Care Facilities Code, 6.7.2.2.4, 6.7.2.2.5, 6.7.2.2.5.15, and 6.7.2.2.7 for more information on transfer switches.Informational Note No. 2: See Informational Note Figure 517.42(B)(1).Informational Note No. 3: See Informational Note Figure 517.42(B)(2).Informational Note Figure 517.42(B)(1) Type 2 Essential Electrical Systems (Nursing Home and Limited Health Care Facilities) - Minimum Requirement (Greater Than 150 kVA) for Transfer Switch Arrangement.Informational Note Figure 517.42(B)(2) Type 2 Essential Electrical Systems (Nursing Home and Limited Health Care Facilities) - Minimum Requirement (150 kVA or Less) for Transfer Switch Arrangement. [517.42_(B)](https://2023.antflix.net#517.42_(B))", + "displayTitle": "(B) Transfer Switches", + "children": [], + "url": "https://2023.antflix.net#517.42_(B)" + }, + { + "body": "The essential electrical system shall have capacity to meet the demand for the operation of all functions and equipment to be served by each branch at one time. [517.42_(C)](https://2023.antflix.net#517.42_(C))", + "displayTitle": "(C) Capacity of System", + "children": [], + "url": "https://2023.antflix.net#517.42_(C)" + }, + { + "body": "The life safety branch and equipment branch shall be kept entirely independent of all other wiring and equipment. [99:6.7.6.3.1] These circuits shall not enter the same raceways, boxes, or cabinets with other wiring except as follows:In transfer switchesIn exit or emergency luminaires supplied from two sourcesIn a common junction box attached to exit or emergency luminaires supplied from two sources [517.42_(D)](https://2023.antflix.net#517.42_(D))", + "displayTitle": "(D) Separation From Other Circuits", + "children": [], + "url": "https://2023.antflix.net#517.42_(D)" + }, + { + "body": "The electrical receptacles or the cover plates for the electrical receptacles supplied from the life safety or equipment branches shall have a distinctive color or marking so as to be readily identifiable. [99:6.7.6.3.2] Informational Note: If color is used to identify these receptacles, the same color should be used throughout the facility. [99:A.6.7.6.3.2] [517.42_(E)](https://2023.antflix.net#517.42_(E))", + "displayTitle": "(E) Receptacle Identification", + "children": [], + "url": "https://2023.antflix.net#517.42_(E)" + } + ], + "url": "https://2023.antflix.net#517.42" + }, + { + "body": "The life safety and equipment branches shall be installed and connected to the alternate source of power specified in 517.41 so that all functions specified herein for the life safety and equipment branches are automatically restored to operation within 10 seconds after interruption of the normal source. [99:6.7.6.4.1] No functions other than those listed in 517.43(A) through (G) shall be connected to the life safety branch. [99:6.7.6.2.1.5(D)] The life safety branch shall supply power as follows: [517.43](https://2023.antflix.net#517.43)", + "displayTitle": "517.43 Automatic Connection to Life Safety and Equipment Branch", + "children": [ + { + "body": "Illumination of means of egress as is necessary for corridors, passageways, stairways, landings, and exit doors and all ways of approach to exits. Switching arrangement to transfer patient corridor lighting from general illumination circuits shall be permitted if only one of two circuits can be selected and both circuits cannot be extinguished at the same time. Informational Note: See NFPA 101-2021, Life Safety Code, Sections 7.8 and 7.9. [517.43_(A)](https://2023.antflix.net#517.43_(A))", + "displayTitle": "(A) Illumination of Means of Egress", + "children": [], + "url": "https://2023.antflix.net#517.43_(A)" + }, + { + "body": "Exit signs and exit directional signs. Informational Note: See NFPA 101-2021, Life Safety Code, Section 7.10. [517.43_(B)](https://2023.antflix.net#517.43_(B))", + "displayTitle": "(B) Exit Signs", + "children": [], + "url": "https://2023.antflix.net#517.43_(B)" + }, + { + "body": "Alarm and alerting systems, including the following: Fire alarmsInformational Note No. 1: See NFPA 101-2021, Life Safety Code, Sections 9.6 and 18.3.4.Alarms required for systems used for the piping of nonflammable medical gasesInformational Note No. 2: See NFPA 99-2021, Health Care Facilities Code, 6.7.5.1.2.5. [517.43_(C)](https://2023.antflix.net#517.43_(C))", + "displayTitle": "(C) Alarm and Alerting Systems", + "children": [], + "url": "https://2023.antflix.net#517.43_(C)" + }, + { + "body": "Communications systems, where used for issuing instructions during emergency conditions. [99:6.7.5.1.2.4(3)] [517.43_(D)](https://2023.antflix.net#517.43_(D))", + "displayTitle": "(D) Communications Systems", + "children": [], + "url": "https://2023.antflix.net#517.43_(D)" + }, + { + "body": "Task illumination and select receptacles at the generator set location and essential electrical system transfer switch locations. [517.43_(E)](https://2023.antflix.net#517.43_(E))", + "displayTitle": "(E) Generator Set Location", + "children": [], + "url": "https://2023.antflix.net#517.43_(E)" + }, + { + "body": "Elevator cab lighting, control, communications, and signal systems. [99:6.7.5.1.2.4(5)] [517.43_(F)](https://2023.antflix.net#517.43_(F))", + "displayTitle": "(F) Elevators", + "children": [], + "url": "https://2023.antflix.net#517.43_(F)" + }, + { + "body": "Generator accessories, including, but not limited to, the transfer fuel pump, electrically operated louvers, and other generator accessories essential for generator operation shall be arranged for automatic connection to the alternate power source. [99:6.7.6.2.1.6(C)] [517.43_(G)](https://2023.antflix.net#517.43_(G))", + "displayTitle": "(G) AC Equipment for Nondelayed Automatic Connection", + "children": [], + "url": "https://2023.antflix.net#517.43_(G)" + } + ], + "url": "https://2023.antflix.net#517.43" + }, + { + "body": "The equipment branch shall be installed and connected to the alternate power source such that equipment described in 517.35(A)(6) is automatically restored to operation at appropriate time-lag intervals following the energizing of the life safety and critical branches. [99:6.7.5.1.4.2(A)] The equipment branch arrangement shall also provide for the additional connection of equipment listed in 517.44(B). Exception: For essential electrical systems under 150 kVA, deletion of the time-lag intervals feature for delayed automatic connection to the equipment branch shall be permitted. [517.44](https://2023.antflix.net#517.44)", + "displayTitle": "517.44 Connection to Equipment Branch", + "children": [ + { + "body": "The following equipment shall be permitted to be connected to the equipment branch and shall be arranged for delayed automatic connection to the alternate power source: Task illumination and select receptacles in the following: [99:6.7.6.2.1.6(D)(1)]Patient care spaces [99:6.7.6.2.1.6(D)(1)(a)]Medication preparation spaces [99:6.7.6.2.1.6(D)(1)(b)]Pharmacy dispensing space [99:6.7.6.2.1.6(D)(1)(c)]Nurses' stations - unless adequately lighted by corridor luminaires [99:6.7.6.2.1.6(D)(1)(d)]Supply, return, and exhaust ventilating systems for airborne infectious isolation rooms [99:6.7.6.2.1.6(D)(2)]Sump pumps and other equipment required to operate for the safety of major apparatus and associated control systems and alarms [99:6.7.6.2.1.6(D)(3)]Smoke control and stair pressurization systems [99:6.7.6.2.1.6(D)(4)]Kitchen hood supply or exhaust systems, or both, if required to operate during a fire in or under the hood [99:6.7.6.2.1.6(D)(5)]Nurse call systems [99:6.7.6.2.1.6(D)(6)] [517.44_(A)](https://2023.antflix.net#517.44_(A))", + "displayTitle": "(A) Delayed Automatic Connections to Equipment Branch", + "children": [], + "url": "https://2023.antflix.net#517.44_(A)" + }, + { + "body": "The equipment specified in 517.44(B)(1) through (B)(4) shall be permitted to be connected to the equipment branch and shall be arranged for either delayed-automatic or manual connection to the alternate power source. [517.44_(B)](https://2023.antflix.net#517.44_(B))", + "displayTitle": "(B) Delayed-Automatic or Manual Connection to the Equipment Branch", + "children": [ + { + "body": "Heating of general patient rooms during disruption of the normal source shall not be required under any of the following conditions: The outside design temperature is higher than \u20146.7\u00b0C (20\u00b0F).The outside design temperature is lower than \u20146.7\u00b0C (20\u00b0F) and, where a selected room(s) is provided for the needs of all confined patients, then only such room(s) need be heated.The facility is served by a dual source of normal power as described in 517.30(C), Informational Note.Informational Note: The outside design temperature is based on the 97.5 percent design values, as shown in Chapter 24 of the ASHRAE Handbook of Fundamentals (2013). [517.44_(B)_(1)](https://2023.antflix.net#517.44_(B)_(1))", + "displayTitle": "(1) Heating Equipment to Provide Heating for General Patient Rooms", + "children": [], + "url": "https://2023.antflix.net#517.44_(B)_(1)" + }, + { + "body": "In instances where interruptions of power would result in elevators stopping between floors, throw-over facilities shall be provided to allow the temporary operation of any elevator for the release of passengers. [517.44_(B)_(2)](https://2023.antflix.net#517.44_(B)_(2))", + "displayTitle": "(2) Elevator Service", + "children": [], + "url": "https://2023.antflix.net#517.44_(B)_(2)" + }, + { + "body": "Additional illumination, receptacles, and equipment shall be permitted to be connected only to the equipment branch. [517.44_(B)_(3)](https://2023.antflix.net#517.44_(B)_(3))", + "displayTitle": "(3) Optional Connections to the Equipment Branch", + "children": [], + "url": "https://2023.antflix.net#517.44_(B)_(3)" + }, + { + "body": "Where one switch serves multiple systems as permitted in 517.43, transfer for all loads shall be nondelayed automatic. [99:6.7.6.2.1.6(E)] Informational Note: See 517.43(G) for elevator cab lighting, control, and signal system requirements. [99:A.6.7.6.2.1.6(E)(2)] [517.44_(B)_(4)](https://2023.antflix.net#517.44_(B)_(4))", + "displayTitle": "(4) Multiple Systems", + "children": [], + "url": "https://2023.antflix.net#517.44_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#517.44_(B)" + } + ], + "url": "https://2023.antflix.net#517.44" + }, + { + "displayTitle": "517.45 Essential Electrical Systems for Other Health Care Facilities", + "children": [ + { + "body": "If required by the governing body, the essential electrical distribution system for Category 3 patient care spaces shall be comprised of an alternate power system capable of supplying a limited amount of lighting and power service for the orderly cessation of procedures during a time normal electrical service is interrupted. Informational Note: See NFPA 99-2021, Health Care Facilities Code. [517.45_(A)](https://2023.antflix.net#517.45_(A))", + "displayTitle": "(A) Essential Electrical Distribution", + "children": [], + "url": "https://2023.antflix.net#517.45_(A)" + }, + { + "body": "Where electrical life support equipment is required, the essential electrical distribution system shall be as described in 517.29 through 517.30. [517.45_(B)](https://2023.antflix.net#517.45_(B))", + "displayTitle": "(B) Electrical Life Support Equipment", + "children": [], + "url": "https://2023.antflix.net#517.45_(B)" + }, + { + "body": "Where Category 1 patient care spaces are present, the essential electrical distribution system shall be in accordance with 517.29 through 517.30. [517.45_(C)](https://2023.antflix.net#517.45_(C))", + "displayTitle": "(C) Category 1 Patient Care Spaces", + "children": [], + "url": "https://2023.antflix.net#517.45_(C)" + }, + { + "body": "Where Category 2 patient care spaces are present, the essential electrical distribution system shall be in accordance with 517.40 through 517.45. [517.45_(D)](https://2023.antflix.net#517.45_(D))", + "displayTitle": "(D) Category 2 Patient Care Spaces", + "children": [], + "url": "https://2023.antflix.net#517.45_(D)" + }, + { + "body": "If required, alternate power sources acceptable to the governing body shall comply with the requirements of NFPA 99-2021, Health Care Facilities Code. [517.45_(E)](https://2023.antflix.net#517.45_(E))", + "displayTitle": "(E) Power Systems", + "children": [], + "url": "https://2023.antflix.net#517.45_(E)" + } + ], + "url": "https://2023.antflix.net#517.45" + }, + { + "body": "Informational Note: See NFPA 99-2021, Health Care Facilities Code, for further information regarding safeguards for anesthetizing locations. [divider_21_IV](https://2023.antflix.net#divider_21_IV)", + "displayTitle": "Part IV Inhalation Anesthetizing Locations", + "children": [], + "url": "https://2023.antflix.net#divider_21_IV" + }, + { + "body": "Informational Note: See 517.20 if either of the anesthetizing locations in 517.60(A) or 517.60(B) is designated a wet procedure location. [517.60](https://2023.antflix.net#517.60)", + "displayTitle": "517.60 Anesthetizing Location Classification", + "children": [ + { + "displayTitle": "(A) Hazardous (Classified) Location", + "children": [ + { + "body": "In a location where flammable anesthetics are employed, the entire area shall be considered to be a Class I, Division 1 location that extends upward to a level 1.52 m (5 ft) above the floor. The remaining volume up to the structural ceiling is considered to be above a hazardous (classified) location. [517.60_(A)_(1)](https://2023.antflix.net#517.60_(A)_(1))", + "displayTitle": "(1) Use Location", + "children": [], + "url": "https://2023.antflix.net#517.60_(A)_(1)" + }, + { + "body": "Any room or location in which flammable anesthetics or volatile flammable disinfecting agents are stored shall be considered to be a Class I, Division 1 location from floor to ceiling. [517.60_(A)_(2)](https://2023.antflix.net#517.60_(A)_(2))", + "displayTitle": "(2) Storage Location", + "children": [], + "url": "https://2023.antflix.net#517.60_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#517.60_(A)" + }, + { + "body": "Any inhalation anesthetizing location designated for the exclusive use of nonflammable anesthetizing agents shall be considered to be an unclassified location. [517.60_(B)](https://2023.antflix.net#517.60_(B))", + "displayTitle": "(B) Unclassified Location", + "children": [], + "url": "https://2023.antflix.net#517.60_(B)" + } + ], + "url": "https://2023.antflix.net#517.60" + }, + { + "displayTitle": "517.61 Wiring and Equipment", + "children": [ + { + "displayTitle": "(A) Within Hazardous (Classified) Anesthetizing Locations", + "children": [ + { + "body": "Except as permitted in 517.160, each power circuit within, or partially within, a flammable anesthetizing location as referred to in 517.60 shall be isolated from any distribution system by the use of an isolated power system. [517.61_(A)_(1)](https://2023.antflix.net#517.61_(A)_(1))", + "displayTitle": "(1) Isolation", + "children": [], + "url": "https://2023.antflix.net#517.61_(A)_(1)" + }, + { + "body": "Where an isolated power system is utilized, the isolated power equipment shall be listed as isolated power equipment, and the isolated power system shall be designed and installed in accordance with 517.160. [517.61_(A)_(2)](https://2023.antflix.net#517.61_(A)_(2))", + "displayTitle": "(2) Design and Installation", + "children": [], + "url": "https://2023.antflix.net#517.61_(A)_(2)" + }, + { + "body": "In hazardous (classified) locations referred to in 517.60, all fixed wiring and equipment and all portable equipment, including lamps and other utilization equipment, operating at more than 10 volts between conductors shall comply with the requirements of 501.1 through 501.25, and 501.100 through 501.150, and 501.30(A) and (B) for Class I, Division 1 locations. All such equipment shall be specifically approved for the hazardous atmospheres involved. [517.61_(A)_(3)](https://2023.antflix.net#517.61_(A)_(3))", + "displayTitle": "(3) Equipment Operating at More Than 10 Volts", + "children": [], + "url": "https://2023.antflix.net#517.61_(A)_(3)" + }, + { + "body": "Where a box, fitting, or enclosure is partially, but not entirely, within a hazardous (classified) location(s), the hazardous (classified) location(s) shall be considered to be extended to include the entire box, fitting, or enclosure. [517.61_(A)_(4)](https://2023.antflix.net#517.61_(A)_(4))", + "displayTitle": "(4) Extent of Location", + "children": [], + "url": "https://2023.antflix.net#517.61_(A)_(4)" + }, + { + "body": "Receptacles and attachment plugs in a hazardous (classified) location(s) shall be listed for use in Class I, Group C hazardous (classified) locations and shall have provision for the connection of an equipment grounding conductor. [517.61_(A)_(5)](https://2023.antflix.net#517.61_(A)_(5))", + "displayTitle": "(5) Receptacles and Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#517.61_(A)_(5)" + }, + { + "body": "Flexible cords used in hazardous (classified) locations for connection to portable utilization equipment, including lamps operating at more than 8 volts between conductors, shall be of a type approved for extra-hard usage in accordance with Table 400.4 and shall include an additional equipment grounding conductor. [517.61_(A)_(6)](https://2023.antflix.net#517.61_(A)_(6))", + "displayTitle": "(6) Flexible Cord Type", + "children": [], + "url": "https://2023.antflix.net#517.61_(A)_(6)" + }, + { + "body": "A storage device for the flexible cord shall be provided and shall not subject the cord to bending at a radius of less than 75 mm (3 in.). [517.61_(A)_(7)](https://2023.antflix.net#517.61_(A)_(7))", + "displayTitle": "(7) Flexible Cord Storage", + "children": [], + "url": "https://2023.antflix.net#517.61_(A)_(7)" + } + ], + "url": "https://2023.antflix.net#517.61_(A)" + }, + { + "displayTitle": "(B) Above Hazardous (Classified) Anesthetizing Locations", + "children": [ + { + "body": "Wiring above a hazardous (classified) location referred to in 517.60 shall be installed in rigid metal conduit, electrical metallic tubing, intermediate metal conduit, Type MI cable, or Type MC cable that employs a continuous, gas/vaportight metal sheath. [517.61_(B)_(1)](https://2023.antflix.net#517.61_(B)_(1))", + "displayTitle": "(1) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#517.61_(B)_(1)" + }, + { + "body": "Installed equipment that may produce arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, generators, motors, or other equipment having make-and-break or sliding contacts, shall be of the totally enclosed type or be constructed so as to prevent escape of sparks or hot metal particles. Exception: Wall-mounted receptacles installed above the hazardous (classified) location in flammable anesthetizing locations shall not be required to be totally enclosed or have openings guarded or screened to prevent dispersion of particles. [517.61_(B)_(2)](https://2023.antflix.net#517.61_(B)_(2))", + "displayTitle": "(2) Equipment Enclosure", + "children": [], + "url": "https://2023.antflix.net#517.61_(B)_(2)" + }, + { + "body": "Surgical and other luminaires shall conform to 501.130(B). Exception No. 1: The surface temperature limitations set forth in 501.130(B)(1) shall not apply. Exception No. 2: Integral or pendant switches that are located above and cannot be lowered into the hazardous (classified) location(s) shall not be required to be explosionproof. [517.61_(B)_(3)](https://2023.antflix.net#517.61_(B)_(3))", + "displayTitle": "(3) Luminaires", + "children": [], + "url": "https://2023.antflix.net#517.61_(B)_(3)" + }, + { + "body": "Listed seals shall be provided in conformance with 501.15, and 501.15(A)(4) shall apply to horizontal as well as to vertical boundaries of the defined hazardous (classified) locations. [517.61_(B)_(4)](https://2023.antflix.net#517.61_(B)_(4))", + "displayTitle": "(4) Seals", + "children": [], + "url": "https://2023.antflix.net#517.61_(B)_(4)" + }, + { + "body": "Receptacles and attachment plugs located above hazardous (classified) anesthetizing locations shall be listed for hospital use for services of prescribed voltage, frequency, rating, and number of conductors with provision for the connection of the equipment grounding conductor. This requirement shall apply to attachment plugs and receptacles of the 2-pole, 3-wire grounding type for single-phase, 120-volt, nominal, ac service. [517.61_(B)_(5)](https://2023.antflix.net#517.61_(B)_(5))", + "displayTitle": "(5) Receptacles and Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#517.61_(B)_(5)" + }, + { + "body": "Receptacles and attachment plugs rated 250 volts, for connection of 50-ampere and 60-ampere ac medical equipment for use above hazardous (classified) locations, shall be arranged so that the 60-ampere receptacle will accept either the 50-ampere or the 60-ampere plug. Fifty-ampere receptacles shall be designed so as not to accept the 60-ampere attachment plug. The attachment plugs shall be of the 2-pole, 3-wire design with a third contact connecting to the insulated (green or green with yellow stripe) equipment grounding conductor of the electrical system. [517.61_(B)_(6)](https://2023.antflix.net#517.61_(B)_(6))", + "displayTitle": "(6) 250-Volt Receptacles and Attachment Plugs Rated 50 and 60 Amperes", + "children": [], + "url": "https://2023.antflix.net#517.61_(B)_(6)" + } + ], + "url": "https://2023.antflix.net#517.61_(B)" + }, + { + "displayTitle": "(C) Unclassified Anesthetizing Locations", + "children": [ + { + "body": "Wiring serving unclassified locations, as defined in 517.60, shall be installed in a metal raceway system or cable assembly. The metal raceway system or cable armor or sheath assembly shall qualify as an equipment grounding conductor in accordance with 250.118. Type MC and Type MI cable shall have an outer metal armor, sheath, or sheath assembly that is identified as an equipment grounding conductor. Exception: Pendant receptacle installations that employ listed Type SJO or equivalent hard usage or extra-hard usage, flexible cords suspended not less than 1.8 m (6 ft) from the floor shall not be required, to be installed in a metal raceway or cable assembly. [517.61_(C)_(1)](https://2023.antflix.net#517.61_(C)_(1))", + "displayTitle": "(1) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#517.61_(C)_(1)" + }, + { + "body": "Receptacles and attachment plugs installed and used in unclassified locations shall be listed \"hospital grade\" for services of prescribed voltage, frequency, rating, and number of conductors with provision for connection of the equipment grounding conductor. This requirement shall apply to 2-pole, 3-wire grounding type for single-phase, 120-, 208-, or 240-volt, nominal, ac service. [517.61_(C)_(2)](https://2023.antflix.net#517.61_(C)_(2))", + "displayTitle": "(2) Receptacles and Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#517.61_(C)_(2)" + }, + { + "body": "Receptacles and attachment plugs rated 250 volts, for connection of 50-ampere and 60-ampere ac medical equipment for use in unclassified locations, shall be arranged so that the 60-ampere receptacle will accept either the 50-ampere or the 60-ampere plug. Fifty-ampere receptacles shall be designed so as not to accept the 60-ampere attachment plug. The attachment plugs shall be of the 2-pole, 3-wire design with a third contact connecting to the insulated (green or green with yellow stripe) equipment grounding conductor of the electrical system. [517.61_(C)_(3)](https://2023.antflix.net#517.61_(C)_(3))", + "displayTitle": "(3) 250-Volt Receptacles and Attachment Plugs Rated 50 Amperes and 60 Amperes", + "children": [], + "url": "https://2023.antflix.net#517.61_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#517.61_(C)" + } + ], + "url": "https://2023.antflix.net#517.61" + }, + { + "body": "In any anesthetizing area, all metal raceways and metal-sheathed cables and all normally non\u2014current-carrying conductive portions of fixed electrical equipment shall be connected to an equipment grounding conductor. Grounding and bonding in Class I locations shall comply with 501.30. Exception: Equipment operating at not more than 10 volts between conductors shall not be required to be connected to an equipment grounding conductor. [517.62](https://2023.antflix.net#517.62)", + "displayTitle": "517.62 Grounding", + "children": [], + "url": "https://2023.antflix.net#517.62" + }, + { + "displayTitle": "517.63 Grounded Power Systems in Anesthetizing Locations", + "children": [ + { + "body": "One or more battery-powered lighting units shall be provided and shall be permitted to be wired to the critical lighting circuit in the area and connected ahead of any local switches. [517.63_(A)](https://2023.antflix.net#517.63_(A))", + "displayTitle": "(A) Battery-Powered Lighting Units", + "children": [], + "url": "https://2023.antflix.net#517.63_(A)" + }, + { + "body": "Branch circuits supplying only listed, fixed, therapeutic and diagnostic equipment, permanently installed above the hazardous (classified) location and in unclassified locations, shall be permitted to be supplied from a normal grounded service, single- or three-phase system, provided the following apply: Wiring for grounded and isolated circuits does not occupy the same raceway or cable.All conductive surfaces of the equipment are connected to an equipment grounding conductor.Equipment (except enclosed X-ray tubes and the leads to the tubes) is located at least 2.5 m (8 ft) above the floor or outside the anesthetizing location.Switches for the grounded branch circuit are located outside the hazardous (classified) location.Exception: Sections 517.63(B)(3) and (B)(4) shall not apply in unclassified locations. [517.63_(B)](https://2023.antflix.net#517.63_(B))", + "displayTitle": "(B) Branch-Circuit Wiring", + "children": [], + "url": "https://2023.antflix.net#517.63_(B)" + }, + { + "body": "Branch circuits supplying only fixed lighting shall be permitted to be supplied by a normal grounded service, provided the following apply: Such luminaires are located at least 2.5 m (8 ft) above the floor.All conductive surfaces of luminaires are connected to an equipment grounding conductor.Wiring for circuits supplying power to luminaires does not occupy the same raceway or cable for circuits supplying isolated power.Switches are wall-mounted and located above hazardous (classified) locations.Exception: Sections 517.63(C)(1) and (C)(4) shall not apply in unclassified locations. [517.63_(C)](https://2023.antflix.net#517.63_(C))", + "displayTitle": "(C) Fixed Lighting Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#517.63_(C)" + }, + { + "body": "Wall-mounted remote-control stations for remote-control switches operating at 24 volts or less shall be permitted to be installed in any anesthetizing location. [517.63_(D)](https://2023.antflix.net#517.63_(D))", + "displayTitle": "(D) Remote-Control Stations", + "children": [], + "url": "https://2023.antflix.net#517.63_(D)" + }, + { + "body": "Where an isolated power system is utilized, the isolated power equipment shall be listed as isolated power equipment. Isolated power system equipment and its supply circuit shall be permitted to be located in an anesthetizing location, provided it is installed above a hazardous (classified) location or in an unclassified location. [517.63_(E)](https://2023.antflix.net#517.63_(E))", + "displayTitle": "(E) Location of Isolated Power Systems", + "children": [], + "url": "https://2023.antflix.net#517.63_(E)" + }, + { + "body": "Except as permitted above, each power circuit within, or partially within, a flammable anesthetizing location as referred to in 517.60 shall be isolated from any distribution system supplying other-than-anesthetizing locations. [517.63_(F)](https://2023.antflix.net#517.63_(F))", + "displayTitle": "(F) Circuits in Anesthetizing Locations", + "children": [], + "url": "https://2023.antflix.net#517.63_(F)" + } + ], + "url": "https://2023.antflix.net#517.63" + }, + { + "displayTitle": "517.64 Low-Voltage Equipment and Instruments", + "children": [ + { + "body": "Low-voltage equipment that is frequently in contact with the bodies of persons or has exposed current-carrying elements shall comply with one of the following: Operate on an electrical potential of 10 volts or lessBe approved as intrinsically safe or double-insulated equipmentBe moisture resistant [517.64_(A)](https://2023.antflix.net#517.64_(A))", + "displayTitle": "(A) Equipment Requirements", + "children": [], + "url": "https://2023.antflix.net#517.64_(A)" + }, + { + "body": "Power shall be supplied to low-voltage equipment from one of the following: An individual portable isolating transformer (autotransformers shall not be used) connected to an isolated power circuit receptacle by means of an appropriate cord and attachment plugA common low-voltage isolating transformer installed in an unclassified locationIndividual dry-cell batteriesCommon batteries made up of storage cells located in an unclassified location [517.64_(B)](https://2023.antflix.net#517.64_(B))", + "displayTitle": "(B) Power Supplies", + "children": [], + "url": "https://2023.antflix.net#517.64_(B)" + }, + { + "body": "Isolating-type transformers for supplying low-voltage circuits shall have both of the following: Approved means for insulating the secondary circuit from the primary circuitThe core and case connected to an equipment grounding conductor [517.64_(C)](https://2023.antflix.net#517.64_(C))", + "displayTitle": "(C) Isolated Circuits", + "children": [], + "url": "https://2023.antflix.net#517.64_(C)" + }, + { + "body": "Resistance or impedance devices shall be permitted to control low-voltage equipment but shall not be used to limit the maximum available voltage to the equipment. [517.64_(D)](https://2023.antflix.net#517.64_(D))", + "displayTitle": "(D) Controls", + "children": [], + "url": "https://2023.antflix.net#517.64_(D)" + }, + { + "body": "Battery-powered appliances shall not be capable of being charged while in operation unless their charging circuitry incorporates an integral isolating-type transformer. [517.64_(E)](https://2023.antflix.net#517.64_(E))", + "displayTitle": "(E) Battery-Powered Appliances", + "children": [], + "url": "https://2023.antflix.net#517.64_(E)" + }, + { + "body": "Any receptacle or attachment plug used on low-voltage circuits shall be of a type that does not permit interchangeable connection with circuits of higher voltage. Informational Note: Any interruption of the circuit, even circuits as low as 10 volts, either by any switch or loose or defective connections anywhere in the circuit, may produce a spark that is sufficient to ignite flammable anesthetic agents. [517.64_(F)](https://2023.antflix.net#517.64_(F))", + "displayTitle": "(F) Receptacles or Attachment Plugs", + "children": [], + "url": "https://2023.antflix.net#517.64_(F)" + } + ], + "url": "https://2023.antflix.net#517.64" + }, + { + "displayTitle": "Part V Diagnostic Imaging and Treatment Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_16_V" + }, + { + "body": "Nothing in this part shall be construed as specifying safeguards against possible radiation or magnetic fields. Informational Note No. 1: Radiation safety and performance requirements of several classes of X-ray equipment are regulated under Public Law 90-602 and are enforced by the Department of Health and Human Services. Informational Note No. 2: Information on radiation protection by the National Council on Radiation Protection and Measurements is published as Reports of the National Council on Radiation Protection and Measurement. These reports are obtainable from NCRP Publications, P.O. Box 30175, Washington, DC 20014. Informational Note No. 3: Examples of diagnostic imaging equipment can include, but are not limited to, the following:General radiographic (X-ray) equipment (mobile and fixed)General fluoroscopic equipment (mobile and fixed)Interventional equipment (mobile and fixed)Bone mineral density equipmentDental equipmentComputerized tomography (CT) equipmentPositron emission tomography (PET) equipmentNuclear medicine equipmentMammography equipmentMagnetic resonance (MR) equipmentDiagnostic ultrasound equipmentElectrocardiogram equipmentInformational Note No. 4: Examples of treatment equipment can include, but are not limited to, the following:Linear acceleratorsGamma knifeCyber knifeProton therapyTomotherapy [517.70](https://2023.antflix.net#517.70)", + "displayTitle": "517.70 Applicability", + "children": [], + "url": "https://2023.antflix.net#517.70" + }, + { + "displayTitle": "517.71 Connection to Supply Circuit", + "children": [ + { + "body": "Fixed and stationary diagnostic imaging and treatment equipment shall be connected to the power supply by means of a wiring method complying with applicable requirements of Chapters 1 through 4 of this Code, as modified by this article. Exception: Equipment properly supplied by a branch circuit rated at not over 30 amperes shall be permitted to be supplied through a suitable attachment plug and hard-service cable or cord. [517.71_(A)](https://2023.antflix.net#517.71_(A))", + "displayTitle": "(A) Fixed and Stationary Diagnostic Imaging and Treatment Equipment", + "children": [], + "url": "https://2023.antflix.net#517.71_(A)" + }, + { + "body": "Individual branch circuits shall not be required for portable, mobile, and transportable medical diagnostic imaging and treatment equipment requiring a capacity of not over 60 amperes. [517.71_(B)](https://2023.antflix.net#517.71_(B))", + "displayTitle": "(B) Portable, Mobile, and Transportable Diagnostic Imaging and Treatment Equipment", + "children": [], + "url": "https://2023.antflix.net#517.71_(B)" + }, + { + "body": "Circuits and equipment operated on a supply circuit of over 1000 volts shall comply with Parts I through IV of Article 495. [517.71_(C)](https://2023.antflix.net#517.71_(C))", + "displayTitle": "(C) Over 1000 Volt Supply", + "children": [], + "url": "https://2023.antflix.net#517.71_(C)" + } + ], + "url": "https://2023.antflix.net#517.71" + }, + { + "displayTitle": "517.72 Disconnecting Means", + "children": [ + { + "body": "A disconnecting means rated for at least 50 percent of the input required for the momentary rating or 100 percent of the input required for the long-time rating of the diagnostic imaging and treatment equipment, whichever is greater, shall be provided in the supply circuit. [517.72_(A)](https://2023.antflix.net#517.72_(A))", + "displayTitle": "(A) Capacity", + "children": [], + "url": "https://2023.antflix.net#517.72_(A)" + }, + { + "body": "The disconnecting means shall be operable from a location readily accessible from the control location. [517.72_(B)](https://2023.antflix.net#517.72_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#517.72_(B)" + }, + { + "body": "For equipment connected to a 120-volt branch circuit of 30 amperes or less, a grounding-type attachment plug and receptacle of proper rating shall be permitted to serve as a disconnecting means. [517.72_(C)](https://2023.antflix.net#517.72_(C))", + "displayTitle": "(C) Portable, Mobile, and Transportable Diagnostic Imaging and Treatment Equipment", + "children": [], + "url": "https://2023.antflix.net#517.72_(C)" + } + ], + "url": "https://2023.antflix.net#517.72" + }, + { + "displayTitle": "517.73 Rating of Supply Conductors and Overcurrent Protection", + "children": [ + { + "body": "The ampacity of supply branch-circuit conductors and the current rating of overcurrent protective devices shall not be less than 50 percent of the momentary rating or 100 percent of the long-time rating, whichever is greater. [517.73_(A)](https://2023.antflix.net#517.73_(A))", + "displayTitle": "(A) Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#517.73_(A)" + }, + { + "body": "The ampacity of supply feeders and the current rating of overcurrent protective devices supplying two or more branch circuits supplying diagnostic imaging and treatment equipment shall not be less than 50 percent of the momentary demand rating of the largest unit, plus 25 percent of the momentary demand rating of the next largest unit, plus 10 percent of the momentary demand rating of each additional unit. Informational Note No. 1: The minimum conductor size for branch and feeder circuits is also governed by voltage regulation requirements. For a specific installation, the manufacturer usually specifies minimum distribution transformer and conductor sizes, rating of disconnecting means, and overcurrent protection. Informational Note No. 2: The ampacity of the branch-circuit conductors and the ratings of disconnecting means and overcurrent protection for diagnostic imaging and treatment equipment are usually designated by the manufacturer for the specific installation. [517.73_(B)](https://2023.antflix.net#517.73_(B))", + "displayTitle": "(B) Feeders", + "children": [], + "url": "https://2023.antflix.net#517.73_(B)" + } + ], + "url": "https://2023.antflix.net#517.73" + }, + { + "displayTitle": "517.74 Control Circuit Conductors", + "children": [ + { + "body": "The number of control circuit conductors installed in a raceway shall be determined in accordance with 300.17. [517.74_(A)](https://2023.antflix.net#517.74_(A))", + "displayTitle": "(A) Number of Conductors in Raceway", + "children": [], + "url": "https://2023.antflix.net#517.74_(A)" + }, + { + "body": "Size 18 AWG or 16 AWG fixture wires in accordance with 724.49 and flexible cords shall be permitted for the control and operating circuits of diagnostic imaging and treatment equipment and auxiliary equipment where protected by not larger than 20-ampere overcurrent devices. [517.74_(B)](https://2023.antflix.net#517.74_(B))", + "displayTitle": "(B) Minimum Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#517.74_(B)" + } + ], + "url": "https://2023.antflix.net#517.74" + }, + { + "body": "Transformers and capacitors that are part of diagnostic imaging and treatment equipment shall not be required to comply with Parts I and II of Articles 450 and 460. Capacitors shall be mounted within enclosures of insulating material or grounded metal. [517.76](https://2023.antflix.net#517.76)", + "displayTitle": "517.76 Transformers and Capacitors", + "children": [], + "url": "https://2023.antflix.net#517.76" + }, + { + "body": "Cables with grounded shields shall be permitted to be installed in cable trays or cable troughs along with control and power supply conductors without the need for barriers to separate the wiring. [517.77](https://2023.antflix.net#517.77)", + "displayTitle": "517.77 Installation of Cables With Grounded Shields", + "children": [], + "url": "https://2023.antflix.net#517.77" + }, + { + "displayTitle": "517.78 Guarding and Grounding", + "children": [ + { + "body": "All high-voltage parts shall be mounted within grounded enclosures. The connection from the high-voltage equipment to other high-voltage components shall be made with high-voltage shielded cables. [517.78_(A)](https://2023.antflix.net#517.78_(A))", + "displayTitle": "(A) High-Voltage Parts", + "children": [], + "url": "https://2023.antflix.net#517.78_(A)" + }, + { + "body": "Low-voltage cables connecting to oil-filled units that are not completely sealed, such as transformers, condensers, oil coolers, and high-voltage switches, shall have insulation of the oil-resistant type. [517.78_(B)](https://2023.antflix.net#517.78_(B))", + "displayTitle": "(B) Low-Voltage Cables", + "children": [], + "url": "https://2023.antflix.net#517.78_(B)" + }, + { + "body": "Non-current-carrying metal parts of diagnostic imaging and treatment equipment (e.g., controls, tables, transformer tanks, shielded cables) shall be connected to an equipment grounding conductor in accordance with Part VII of Article 250, as modified by 517.13(A) and (B). [517.78_(C)](https://2023.antflix.net#517.78_(C))", + "displayTitle": "(C) Non-Current-Carrying Metal Parts", + "children": [], + "url": "https://2023.antflix.net#517.78_(C)" + } + ], + "url": "https://2023.antflix.net#517.78" + }, + { + "displayTitle": "Part VI Communications, Signaling Systems, Data Systems, Fire Alarm Systems, and Systems Less Than 120 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#divider_11_VI" + }, + { + "body": "Equivalent insulation and isolation to that required for the electrical distribution systems in patient care areas shall be provided for communications, signaling systems, data system circuits, fire alarm systems, and systems less than 120 volts, nominal. Class 2 and Class 3 signaling and communications systems, Class 2 circuits that transmit power and data to a powered device, and power-limited fire alarm systems shall not be required to comply with the grounding requirements of 517.13, to comply with the mechanical protection requirements of 517.31(C)(3)(5), or to be enclosed in raceways, unless otherwise specified by Chapters 7 or 8. Secondary circuits of transformer-powered communications or signaling systems shall not be required to be enclosed in raceways unless otherwise specified by Chapters 7 or 8. [99:6.7.2.2.7] Informational Note: See ANSI/NEMA C137.3-2017, American National Standard for Lighting Systems - Minimum Requirements for Installation of Energy Efficient Power over Ethernet (PoE) Lighting Systems, for information on installation of cables for PoE lighting systems. [517.80](https://2023.antflix.net#517.80)", + "displayTitle": "517.80 Patient Care Spaces", + "children": [], + "url": "https://2023.antflix.net#517.80" + }, + { + "body": "In other-than-patient-care spaces, installations shall be in accordance with other parts of this Code. [517.81](https://2023.antflix.net#517.81)", + "displayTitle": "517.81 Other-Than-Patient-Care Spaces", + "children": [], + "url": "https://2023.antflix.net#517.81" + }, + { + "displayTitle": "517.82 Signal Transmission Between Appliances", + "children": [ + { + "body": "Permanently installed signal cabling from an appliance in a patient location to remote appliances shall employ a signal transmission system that prevents hazardous grounding interconnection of the appliances. Informational Note: See 517.13(A) for additional grounding requirements in patient care spaces. [517.82_(A)](https://2023.antflix.net#517.82_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#517.82_(A)" + }, + { + "body": "Common signal grounding wires (i.e., the chassis ground for single-ended transmission) shall be permitted to be used between appliances all located within the patient care vicinity, provided the appliances are served from the same reference grounding point. [517.82_(B)](https://2023.antflix.net#517.82_(B))", + "displayTitle": "(B) Common Signal Grounding Wire", + "children": [], + "url": "https://2023.antflix.net#517.82_(B)" + } + ], + "url": "https://2023.antflix.net#517.82" + }, + { + "displayTitle": "Part VII Isolated Power Systems", + "children": [], + "url": "https://2023.antflix.net#divider_10_VII" + }, + { + "displayTitle": "517.160 Isolated Power Systems", + "children": [ + { + "displayTitle": "(A) Installations", + "children": [ + { + "body": "Each isolated power circuit shall be controlled by a switch or circuit breaker that has a disconnecting pole in each isolated circuit conductor to simultaneously disconnect all power. Such isolation shall be accomplished by means of one or more isolation transformers, by means of generator sets, or by means of electrically isolated batteries. Conductors of isolated power circuits shall not be installed in cables, raceways, or other enclosures containing conductors of another system. [517.160_(A)_(1)](https://2023.antflix.net#517.160_(A)_(1))", + "displayTitle": "(1) Isolated Power Circuits", + "children": [], + "url": "https://2023.antflix.net#517.160_(A)_(1)" + }, + { + "body": "Circuits supplying primaries of isolating transformers shall operate at not more than 600 volts between conductors and shall be provided with proper overcurrent protection. The secondary voltage of such transformers shall not exceed 600 volts between conductors of each circuit. All circuits supplied from such secondaries shall be ungrounded and shall have an approved overcurrent device of proper ratings in each conductor. Circuits supplied directly from batteries or from motor generator sets shall be ungrounded and shall be protected against overcurrent in the same manner as transformer-fed secondary circuits. If an electrostatic shield is present, it shall be connected to the reference grounding point. [517.160_(A)_(2)](https://2023.antflix.net#517.160_(A)_(2))", + "displayTitle": "(2) Circuit Characteristics", + "children": [], + "url": "https://2023.antflix.net#517.160_(A)_(2)" + }, + { + "body": "The isolating transformers, motor generator sets, batteries and battery chargers, and associated primary or secondary overcurrent devices shall not be installed in hazardous (classified) locations. The isolated secondary circuit wiring extending into a hazardous anesthetizing location shall be installed in accordance with 501.10. [517.160_(A)_(3)](https://2023.antflix.net#517.160_(A)_(3))", + "displayTitle": "(3) Equipment Location", + "children": [], + "url": "https://2023.antflix.net#517.160_(A)_(3)" + }, + { + "body": "An isolation transformer shall not serve more than one operating room except as covered in 517.160(A)(4)(a) and (A)(4)(b). For purposes of this section, anesthetic induction rooms are considered part of the operating room or rooms served by the induction rooms.Induction Rooms. Where an induction room serves more than one operating room, the isolated circuits of the induction room shall be permitted to be supplied from the isolation transformer of any one of the operating rooms served by that induction room.Higher Voltages. Isolation transformers shall be permitted to serve single receptacles in several patient areas where the following apply:The receptacles are reserved for supplying power to equipment requiring 150 volts or higher, such as portable X-ray units.The receptacles and mating plugs are not interchangeable with the receptacles on the local isolated power system. [517.160_(A)_(4)](https://2023.antflix.net#517.160_(A)_(4))", + "displayTitle": "(4) Isolation Transformers", + "children": [], + "url": "https://2023.antflix.net#517.160_(A)_(4)" + }, + { + "body": "The isolated circuit conductors shall be identified as follows: Isolated Conductor No. 1 - Orange with at least one distinctive colored stripe other than white, green, or gray along the entire length of the conductorIsolated Conductor No. 2 - Brown with at least one distinctive colored stripe other than white, green, or gray along the entire length of the conductorFor 3-phase systems, the third conductor shall be identified as yellow with at least one distinctive colored stripe other than white, green, or gray along the entire length of the conductor. Where isolated circuit conductors supply 125-volt, single-phase, 15- and 20-ampere receptacles, the striped orange conductor(s) shall be connected to the terminal(s) on the receptacles that are identified in accordance with 200.10(B) for connection to the grounded circuit conductor. [517.160_(A)_(5)](https://2023.antflix.net#517.160_(A)_(5))", + "displayTitle": "(5) Conductor Identification", + "children": [], + "url": "https://2023.antflix.net#517.160_(A)_(5)" + }, + { + "body": "Wire-pulling compounds that increase the dielectric constant shall not be used on the secondary conductors of the isolated power supply. Informational Note No. 1: It is desirable to limit the size of the isolation transformer to 10 kVA or less and to use conductor insulation with low leakage to meet impedance requirements. Informational Note No. 2: Minimizing the length of branch-circuit conductors and using conductor insulations with a dielectric constant less than 3.5 and insulation resistance constant greater than 6100 megohm-meters (20,000 megohm-feet) at 16\u00b0C (60\u00b0F) reduces leakage from line to ground, reducing the hazard current. [517.160_(A)_(6)](https://2023.antflix.net#517.160_(A)_(6))", + "displayTitle": "(6) Wire-Pulling Compounds", + "children": [], + "url": "https://2023.antflix.net#517.160_(A)_(6)" + } + ], + "url": "https://2023.antflix.net#517.160_(A)" + }, + { + "displayTitle": "(B) Line Isolation Monitor", + "children": [ + { + "body": "In addition to the usual control and over-current protective devices, each isolated power system shall be provided with a listed continually operating line isolation monitor that indicates total hazard current. The monitor shall be designed such that a green signal lamp, conspicuously visible to persons in each area served by the isolated power system, remains lighted when the system is adequately isolated from ground. An adjacent red signal lamp and an audible warning signal (remote if desired) shall be energized when the total hazard current (consisting of possible resistive and capacitive leakage currents) from either isolated conductor to ground reaches a threshold value of 5 mA under nominal line voltage conditions. The line monitor shall not alarm for a fault hazard of less than 3.7 mA or for a total hazard current of less than 5 mA. Exception: A system shall be permitted to be designed to operate at a lower threshold value of total hazard current. A line isolation monitor for such a system shall be permitted to be approved, with the provision that the fault hazard current shall be permitted to be reduced but not to less than 35 percent of the corresponding threshold value of the total hazard current, and the monitor hazard current is to be correspondingly reduced to not more than 50 percent of the alarm threshold value of the total hazard current. [517.160_(B)_(1)](https://2023.antflix.net#517.160_(B)_(1))", + "displayTitle": "(1) Characteristics", + "children": [], + "url": "https://2023.antflix.net#517.160_(B)_(1)" + }, + { + "body": "The line isolation monitor shall be designed to have sufficient internal impedance such that, when properly connected to the isolated system, the maximum internal current that can flow through the line isolation monitor, when any point of the isolated system is grounded, shall be 1 mA. Exception: The line isolation monitor shall be permitted to be of the low-impedance type such that the current through the line isolation monitor, when any point of the isolated system is grounded, will not exceed twice the alarm threshold value for a period not exceeding 5 milliseconds. Informational Note: Reduction of the monitor hazard current, provided this reduction results in an increased \"not alarm\" threshold value for the fault hazard current, will increase circuit capacity. [517.160_(B)_(2)](https://2023.antflix.net#517.160_(B)_(2))", + "displayTitle": "(2) Impedance", + "children": [], + "url": "https://2023.antflix.net#517.160_(B)_(2)" + }, + { + "body": "An ammeter calibrated in the total hazard current of the system (contribution of the fault hazard current plus monitor hazard current) shall be mounted in a plainly visible place on the line isolation monitor with the \"alarm on\" zone at approximately the center of the scale. Exception: The line isolation monitor shall be permitted to be a composite unit, with a sensing section cabled to a separate display panel section on which the alarm or test functions are located. Informational Note: It is desirable to locate the ammeter so that it is conspicuously visible to persons in the anesthetizing location. [517.160_(B)_(3)](https://2023.antflix.net#517.160_(B)_(3))", + "displayTitle": "(3) Ammeter", + "children": [], + "url": "https://2023.antflix.net#517.160_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#517.160_(B)" + } + ], + "url": "https://2023.antflix.net#517.160" + } + ], + "url": "https://2023.antflix.net#517" + }, + { + "displayTitle": "Article 518 Assembly Occupancies", + "children": [ + { + "body": "Except for the assembly occupancies explicitly covered by 520.1, this article covers all buildings or portions of buildings or structures designed or intended for the gathering together of 100 or more persons for such purposes as deliberation, worship, entertainment, eating, drinking, amusement, awaiting transportation, or similar purposes. Informational Note: See NFPA 101-2021, Life Safety Code, or the local building code for methods of determining population capacity. [518.1](https://2023.antflix.net#518.1)", + "displayTitle": "518.1 Scope", + "children": [], + "url": "https://2023.antflix.net#518.1" + }, + { + "displayTitle": "518.2 General Classification", + "children": [ + { + "body": "Assembly occupancies shall include, but not be limited to, the following: ArmoriesAssembly hallsAuditoriumsBowling lanesCasinos and gaming facilitiesClub roomsConference roomsCourtroomsDance hallsDining and drinking facilitiesExhibition hallsGymnasiumsMortuary chapelsMultipurpose roomsMuseumsPlaces of awaiting transportationPlaces of religious worshipPool roomsRestaurantsSkating rinks [518.2_(A)](https://2023.antflix.net#518.2_(A))", + "displayTitle": "(A) Examples", + "children": [], + "url": "https://2023.antflix.net#518.2_(A)" + }, + { + "body": "Where an assembly occupancy forms a portion of a building containing other occupancies, Article 518 applies only to that portion of the building considered an assembly occupancy. Occupancy of any room or space for assembly purposes by less than 100 persons in a building of other occupancy, and incidental to such other occupancy, shall be classified as part of the other occupancy. [518.2_(B)](https://2023.antflix.net#518.2_(B))", + "displayTitle": "(B) Multiple Occupancies", + "children": [], + "url": "https://2023.antflix.net#518.2_(B)" + }, + { + "body": "Where any such building or structure, or portion of a building or structure, contains a projection booth or stage platform or area for the presentation of theatrical or musical productions, either fixed or portable, the wiring for that area, including associated audience seating areas, and all equipment that is used in the referenced area, and portable equipment and wiring for use in the production that will not be connected to permanently installed wiring, shall comply with Article 520. Informational Note: See NFPA 101-2021, Life Safety Code, or the local building code for methods of determining population capacity. [518.2_(C)](https://2023.antflix.net#518.2_(C))", + "displayTitle": "(C) Theatrical Areas", + "children": [], + "url": "https://2023.antflix.net#518.2_(C)" + } + ], + "url": "https://2023.antflix.net#518.2" + }, + { + "body": "In exhibition halls used for display booths, as in trade shows, the temporary wiring shall be permitted to be installed in accordance with Article 590. Flexible cables and cords approved for hard or extra-hard usage shall be permitted to be laid on floors where protected from contact by the general public. The ground-fault circuit-interrupter requirements of 590.6 shall not apply. All other ground-fault circuit-interrupter requirements of this Code shall apply. Where ground-fault circuit-interrupter protection for personnel is cord-and-plug-connected to the branch circuit or to the feeder, the ground-fault circuit-interrupter protection shall be listed as portable ground-fault circuit-interrupter protection or provide a level of protection equivalent to a portable ground-fault circuit interrupter, whether assembled in the field or at the factory. Exception: Where conditions of supervision and maintenance ensure that only qualified persons will service the installation, flexible cords or cables identified in Table 400.4 for hard usage or extra-hard usage shall be permitted in cable trays used only for temporary wiring. All cords or cables shall be installed in a single layer. A permanent sign shall be attached to the cable tray at intervals not to exceed 7.5 m (25 ft) and read as follows: CABLE TRAY FOR TEMPORARY WIRING ONLY [518.3](https://2023.antflix.net#518.3)", + "displayTitle": "518.3 Temporary Wiring", + "children": [], + "url": "https://2023.antflix.net#518.3" + }, + { + "displayTitle": "518.4 Wiring Methods", + "children": [ + { + "body": "The wiring method shall qualify as an equipment grounding conductor in accordance with 250.118 or shall contain an equipment grounding conductor sized in accordance with Table 250.122, and shall be any of the following: Metal racewaysFlexible metal racewaysNonmetallic raceways encased in not less than 50 mm (2 in.) of concreteType MI, Type MC, or Type AC cable [518.4_(A)](https://2023.antflix.net#518.4_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#518.4_(A)" + }, + { + "body": "Fixed wiring methods for specific installations shall be as follows:Audio signal processing, amplification, and reproduction equipment - 640.9Communications systems - Part IV of Article 805 and Part VI of Article 840Class 2 and Class 3 remote control and signaling circuits - Article 725, Part IIIClass 2 circuits that transmit power, data, or both to a powered deviceInformational Note: See ANSI/NEMA C137.3-2017, American National Standard for Lighting Systems - Minimum Requirements for Installation of Energy Efficient Power over Ethernet (PoE) Lighting Systems, for information on installation of cables for PoE lighting systems. See Part III of Article 760 for information on fire alarm circuits. [518.4_(B)](https://2023.antflix.net#518.4_(B))", + "displayTitle": "(B) Communications, Signaling Systems, Data Systems, Fire Alarm Systems, and Systems Less Than 120 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#518.4_(B)" + }, + { + "body": "In addition to the wiring methods permitted by 518.4(A), nonmetallic-sheathed cable, electrical nonmetallic tubing, and rigid nonmetallic conduit shall be permitted to be installed in those buildings or portions of those buildings that are not required to be of fire-rated construction by the applicable building code. Informational Note: Fire-rated construction is the fire-resistive classification used in building codes. [518.4_(C)](https://2023.antflix.net#518.4_(C))", + "displayTitle": "(C) Nonrated Construction", + "children": [], + "url": "https://2023.antflix.net#518.4_(C)" + }, + { + "body": "Electrical nonmetallic tubing and rigid nonmetallic conduit shall be permitted to be installed in club rooms, conference and meeting rooms in hotels or motels, courtrooms, dining facilities, restaurants, mortuary chapels, museums, libraries, and places of religious worship where the following apply: The tubing or conduit is installed concealed within walls, floors, and ceilings where the walls, floors, and ceilings provide a thermal barrier of material that has at least a 15-minute finish rating as identified in listings of fire-rated assemblies.The tubing or conduit is installed above suspended ceilings where the suspended ceilings provide a thermal barrier of material that has at least a 15-minute finish rating as identified in listings of fire-rated assemblies.Electrical nonmetallic tubing and rigid nonmetallic conduit are not recognized for use in other space used for environmental air in accordance with 300.22(C).Informational Note: A finish rating is established for assemblies containing combustible (wood) supports. The finish rating is defined as the time at which the wood stud or wood joist reaches an average temperature rise of 121\u00b0C (250\u00b0F) or an individual temperature rise of 163\u00b0C (325\u00b0F) as measured on the plane of the wood nearest the fire. A finish rating is not intended to represent a rating for a membrane ceiling. [518.4_(D)](https://2023.antflix.net#518.4_(D))", + "displayTitle": "(D) Spaces With Finish Rating", + "children": [], + "url": "https://2023.antflix.net#518.4_(D)" + } + ], + "url": "https://2023.antflix.net#518.4" + }, + { + "body": "Portable switchboards, portable power distribution equipment, and commercial appliance outlet centers shall be installed in accordance with 518.5(A) through (C). [518.5](https://2023.antflix.net#518.5)", + "displayTitle": "518.5 Supply", + "children": [ + { + "displayTitle": "(A) Power Outlets and Commercial Appliance Outlet Centers", + "children": [ + { + "body": "Power outlets and commercial appliance outlet centers shall provide overcurrent protection or shall be protected by overcurrent devices. [518.5_(A)_(1)](https://2023.antflix.net#518.5_(A)_(1))", + "displayTitle": "(1) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#518.5_(A)_(1)" + }, + { + "body": "Overcurrent devices, power outlets, and commercial appliance outlet centers shall not be accessible to the general public. [518.5_(A)_(2)](https://2023.antflix.net#518.5_(A)_(2))", + "displayTitle": "(2) Accessibility", + "children": [], + "url": "https://2023.antflix.net#518.5_(A)_(2)" + }, + { + "body": "Connecting means for an equipment grounding conductor shall be provided. [518.5_(A)_(3)](https://2023.antflix.net#518.5_(A)_(3))", + "displayTitle": "(3) Equipment Grounding Conductor Connections", + "children": [], + "url": "https://2023.antflix.net#518.5_(A)_(3)" + }, + { + "body": "Power outlets and commercial appliance outlet centers shall be marked as follows: FOR USE BY QUALIFIED PERSONS ONLY. RISK OF ELECTRIC SHOCK.Disconnect all power before servicing. Disconnecting means location: [518.5_(A)_(4)](https://2023.antflix.net#518.5_(A)_(4))", + "displayTitle": "(4) Markings", + "children": [], + "url": "https://2023.antflix.net#518.5_(A)_(4)" + }, + { + "body": "A panelboard installed in a listed commercial appliance outlet center designed for in-floor mounting shall be permitted to be orientated in the face-up position, if such orientation is part of the listing, and 408.43 shall not apply. [518.5_(A)_(5)](https://2023.antflix.net#518.5_(A)_(5))", + "displayTitle": "(5) Panelboard Orientation", + "children": [], + "url": "https://2023.antflix.net#518.5_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#518.5_(A)" + }, + { + "body": "Portable switchboards and portable power distribution equipment shall be supplied only from listed power outlets or listed commercial appliance outlet centers, each having sufficient voltage and ampere ratings. [518.5_(B)](https://2023.antflix.net#518.5_(B))", + "displayTitle": "(B) Portable Switchboards and Portable Power Distribution Equipment", + "children": [], + "url": "https://2023.antflix.net#518.5_(B)" + }, + { + "body": "The neutral conductor of feeders supplying solid-state phase control, 3-phase, 4-wire dimmer systems shall be considered a current-carrying conductor for purposes of ampacity adjustment. The neutral conductor of feeders supplying solid-state sine wave, 3-phase, 4-wire dimming systems shall not be considered a current-carrying conductor for purposes of ampacity adjustment. Exception: The neutral conductor of feeders supplying systems that use or are capable of using both phase-control and sine-wave dimmers shall be considered as current-carrying for purposes of ampacity adjustment. Informational Note: See Article 100 for definitions of solid-state dimmer types. [518.5_(C)](https://2023.antflix.net#518.5_(C))", + "displayTitle": "(C) Neutral Conductor of Feeders Supplying Solid State Dimmer Systems", + "children": [], + "url": "https://2023.antflix.net#518.5_(C)" + } + ], + "url": "https://2023.antflix.net#518.5" + }, + { + "body": "Illumination shall be provided for all working spaces about fixed service equipment, switchboards, switchgear, panelboards, or motor control centers installed outdoors that serve assembly occupancies. Control by automatic means only shall not be permitted. Additional lighting outlets shall not be required where the workspace is illuminated by an adjacent light source. [518.6](https://2023.antflix.net#518.6)", + "displayTitle": "518.6 Illumination", + "children": [], + "url": "https://2023.antflix.net#518.6" + } + ], + "url": "https://2023.antflix.net#518" + }, + { + "displayTitle": "Article 520 Theaters, Audience Areas of Motion Picture and Television Studios, Performance Areas, and Similar Locations", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_79_I" + }, + { + "body": "This article covers all buildings or that part of a building or structure, indoor or outdoor, designed or used for presentation, dramatic, musical, motion picture projection, or similar purposes and to specific audience seating areas within motion picture or television studios. [520.1](https://2023.antflix.net#520.1)", + "displayTitle": "520.1 Scope", + "children": [], + "url": "https://2023.antflix.net#520.1" + }, + { + "displayTitle": "520.5 Wiring Methods", + "children": [ + { + "body": "The fixed wiring method shall be any of the following: Metal racewaysNonmetallic raceways encased in at least 50 mm (2 in.) of concreteType MI cable, Type MC cable, or Type AC cable containing an insulated equipment grounding conductor sized in accordance with Table 250.122 [520.5_(A)](https://2023.antflix.net#520.5_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#520.5_(A)" + }, + { + "body": "Fixed wiring methods for specific installations shall be as follows: Audio signal processing, amplification, and reproduction equipment - 640.9Communications systems - Parts I and IV of Article 800, Part IV of Article 805, and Part VI of Article 840Class 2 and Class 3 remote control and signaling circuits - Part III of Article 725Class 2 circuits that transmit power, data, or both to a powered deviceInformational Note: See ANSI/NEMA C137.3-2017, American National Standard for Lighting Systems - Minimum Requirements for Installation of Energy Efficient Power over Ethernet (PoE) Lighting Systems, for information on installation of cables for PoE lighting systems. See Part III of Article 760 for information on fire alarm circuits. [520.5_(B)](https://2023.antflix.net#520.5_(B))", + "displayTitle": "(B) Communications, Signaling Systems, Data Systems, Fire Alarm Systems, and Systems Less Than 120 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#520.5_(B)" + }, + { + "body": "The wiring for portable switchboards, stage set lighting, stage effects, and other wiring not fixed as to location shall be permitted with approved flexible cords and cables as provided elsewhere in Article 520. Fastening such cables and cords by uninsulated staples or nailing shall not be permitted. [520.5_(C)](https://2023.antflix.net#520.5_(C))", + "displayTitle": "(C) Portable Equipment", + "children": [], + "url": "https://2023.antflix.net#520.5_(C)" + }, + { + "body": "Nonmetallic-sheathed cable, Type AC cable, electrical nonmetallic tubing, and rigid nonmetallic conduit shall be permitted to be installed in those buildings or portions of buildings that are not required to be of fire-rated construction by the applicable building code. [520.5_(D)](https://2023.antflix.net#520.5_(D))", + "displayTitle": "(D) Nonrated Construction", + "children": [], + "url": "https://2023.antflix.net#520.5_(D)" + } + ], + "url": "https://2023.antflix.net#520.5" + }, + { + "body": "The number of conductors permitted in any metal conduit, rigid nonmetallic conduit as permitted in this article, or electrical metallic tubing for circuits or for remote-control conductors shall not exceed the percentage fill shown in Table 1 of Chapter 9. Where contained within an auxiliary gutter or a wireway, the sum of the cross-sectional areas of all contained conductors at any cross section shall not exceed 20 percent of the interior cross-sectional area of the auxiliary gutter or wireway. The 30-conductor limitation of 366.22 and 376.22 shall not apply. [520.6](https://2023.antflix.net#520.6)", + "displayTitle": "520.6 Number of Conductors in Raceway", + "children": [], + "url": "https://2023.antflix.net#520.6" + }, + { + "body": "A branch circuit of any size supplying one or more receptacles shall be permitted to supply stage set lighting. The voltage rating of the receptacles shall be not less than the circuit voltage. Receptacle ampere ratings and branch-circuit conductor ampacity shall be not less than the branch-circuit overcurrent device ampere rating. Table 210.21(B)(2) and 210.23 shall not apply. The requirements in 210.8(B), other than 210.8(B)(6), shall apply. [520.9](https://2023.antflix.net#520.9)", + "displayTitle": "520.9 Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#520.9" + }, + { + "body": "Portable stage and studio lighting equipment and portable power distribution equipment not identified for outdoor use shall be permitted for temporary use outdoors if the equipment is supervised by qualified personnel while energized and barriered from the general public. Informational Note: See ANSI/ESTA E1.58-2017, Electrical Safely Standard for Portable Stage and Studio Equipment Used Outdoors, for information on the use of portable stage and studio lighting equipment outdoors. [520.10](https://2023.antflix.net#520.10)", + "displayTitle": "520.10 Portable Equipment Used Outdoors", + "children": [], + "url": "https://2023.antflix.net#520.10" + }, + { + "displayTitle": "Part II Fixed Stage Switchboards", + "children": [], + "url": "https://2023.antflix.net#divider_79_II" + }, + { + "body": "Fixed stage switchboards shall comply with the following: Fixed stage switchboards shall be listed.Fixed stage switchboards shall be readily accessible but shall not be required to be located on or adjacent to the stage. Multiple fixed stage switchboards shall be permitted at different locations.A fixed stage switchboard shall contain overcurrent protective devices for all branch circuits supplied by that switchboard.A fixed stage switchboard shall be permitted to supply both stage and nonstage equipment.Fixed stage switchboards shall comply with the marking and working space requirements in 408.18(C) but shall not be required to comply with the load terminal location requirements in 408.18(C)(1), (C)(2), and (C)(3). [520.21](https://2023.antflix.net#520.21)", + "displayTitle": "520.21 General", + "children": [], + "url": "https://2023.antflix.net#520.21" + }, + { + "body": "Dimmers shall comply with 520.25(A) through (C). [520.25](https://2023.antflix.net#520.25)", + "displayTitle": "520.25 Dimmers", + "children": [ + { + "body": "If dimmers are installed in ungrounded conductors, each dimmer shall have overcurrent protection not greater than 125 percent of the dimmer rating and shall be disconnected from all ungrounded conductors where the master or individual switch or circuit breaker supplying such dimmer is in the open position. [520.25_(A)](https://2023.antflix.net#520.25_(A))", + "displayTitle": "(A) Disconnection and Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#520.25_(A)" + }, + { + "body": "The circuit supplying an autotransformer-type dimmer shall not exceed 150 volts between conductors. The grounded conductor shall be common to the input and output circuits. Informational Note: See 210.9 for circuits derived from auto-transformers. [520.25_(B)](https://2023.antflix.net#520.25_(B))", + "displayTitle": "(B) Autotransformer-Type Dimmers", + "children": [], + "url": "https://2023.antflix.net#520.25_(B)" + }, + { + "body": "The circuit supplying a solid-state dimmer shall not exceed 150 volts between conductors unless the dimmer is listed specifically for higher voltage operation. Where a grounded conductor supplies a dimmer, it shall be common to the input and output circuits. Dimmer chassis shall be connected to the equipment grounding conductor. [520.25_(C)](https://2023.antflix.net#520.25_(C))", + "displayTitle": "(C) Solid-State-Type Dimmers", + "children": [], + "url": "https://2023.antflix.net#520.25_(C)" + } + ], + "url": "https://2023.antflix.net#520.25" + }, + { + "body": "A stage switchboard shall be either one or a combination of the types specified in 520.26(A), (B), (C), and (D). [520.26](https://2023.antflix.net#520.26)", + "displayTitle": "520.26 Type of Switchboard", + "children": [ + { + "body": "Dimmers and switches are operated by handles mechanically linked to the control devices. [520.26_(A)](https://2023.antflix.net#520.26_(A))", + "displayTitle": "(A) Manual", + "children": [], + "url": "https://2023.antflix.net#520.26_(A)" + }, + { + "body": "Devices are operated electrically from a pilot-type control console or panel. Pilot control panels either shall be part of the switchboard or shall be permitted to be at another location. [520.26_(B)](https://2023.antflix.net#520.26_(B))", + "displayTitle": "(B) Remotely Controlled", + "children": [], + "url": "https://2023.antflix.net#520.26_(B)" + }, + { + "body": "A stage switchboard with circuit interconnections is a secondary switchboard (patch panel) or panelboard remote to the primary stage switchboard. It shall contain overcurrent protection. Where the required branch-circuit overcurrent protection is provided in the dimmer panel, it shall be permitted to be omitted from the intermediate switchboard. [520.26_(C)](https://2023.antflix.net#520.26_(C))", + "displayTitle": "(C) Intermediate", + "children": [], + "url": "https://2023.antflix.net#520.26_(C)" + }, + { + "body": "A stage switchboard containing only over-current protective devices and no control elements. [520.26_(D)](https://2023.antflix.net#520.26_(D))", + "displayTitle": "(D) Constant Power", + "children": [], + "url": "https://2023.antflix.net#520.26_(D)" + } + ], + "url": "https://2023.antflix.net#520.26" + }, + { + "displayTitle": "520.27 Stage Switchboard Feeders", + "children": [ + { + "body": "Feeders supplying stage switchboards shall be one of the types in 520.27 (A)(1) through (A)(3). [520.27_(A)](https://2023.antflix.net#520.27_(A))", + "displayTitle": "(A) Type of Feeder", + "children": [ + { + "body": "A single feeder disconnected by a single disconnect device. [520.27_(A)_(1)](https://2023.antflix.net#520.27_(A)_(1))", + "displayTitle": "(1) Single Feeder", + "children": [], + "url": "https://2023.antflix.net#520.27_(A)_(1)" + }, + { + "body": "Multiple feeders of unlimited quantity shall be permitted, provided that all multiple feeders are part of a single system. Where combined, neutral conductors in a given raceway shall be of sufficient ampacity to carry the maximum unbalanced current supplied by multiple feeder conductors in the same raceway, but they need not be greater than the ampacity of the neutral conductor supplying the primary stage switchboard. Parallel neutral conductors shall comply with 310.10(G). [520.27_(A)_(2)](https://2023.antflix.net#520.27_(A)_(2))", + "displayTitle": "(2) Multiple Feeders to Intermediate Stage Switchboard (Patch Panel)", + "children": [], + "url": "https://2023.antflix.net#520.27_(A)_(2)" + }, + { + "body": "Installations with separate feeders to a single primary stage switchboard shall have a disconnecting means for each feeder. The primary stage switchboard shall have a permanent and obvious label stating the number and location of disconnecting means. If the disconnecting means are located in more than one distribution switchboard, the primary stage switchboard shall be provided with barriers to correspond with these multiple locations. [520.27_(A)_(3)](https://2023.antflix.net#520.27_(A)_(3))", + "displayTitle": "(3) Separate Feeders to Single Primary Stage Switchboard (Dimmer Bank)", + "children": [], + "url": "https://2023.antflix.net#520.27_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#520.27_(A)" + }, + { + "body": "the purpose of ampacity adjustment, the following shall apply: The neutral conductor of feeders supplying solid-state, phase-control 3-phase, 4-wire dimming systems shall be considered a current-carrying conductor.The neutral conductor of feeders supplying solid-state, sine wave 3-phase, 4-wire dimming systems shall not be considered a current-carrying conductor.The neutral conductor of feeders supplying systems that use or are capable of using both phase-control and sine wave dimmers shall be considered as current-carrying. [520.27_(B)](https://2023.antflix.net#520.27_(B))", + "displayTitle": "(B) Neutral Conductor. For", + "children": [], + "url": "https://2023.antflix.net#520.27_(B)" + }, + { + "body": "For the purposes of calculating supply capacity to switchboards, considering the maximum load that the switchboard is intended to control in a given installation shall be permitted if the following apply: All feeders supplying the switchboard shall be protected by an overcurrent device with a rating not greater than the ampacity of the feeder.The opening of the overcurrent device shall not affect the proper operation of the egress or emergency lighting systems.Informational Note: See 220.40 for calculation of stage switchboard feeder loads. [520.27_(C)](https://2023.antflix.net#520.27_(C))", + "displayTitle": "(C) Supply Capacity", + "children": [], + "url": "https://2023.antflix.net#520.27_(C)" + } + ], + "url": "https://2023.antflix.net#520.27" + }, + { + "displayTitle": "Part III Fixed Stage Equipment Other Than Switchboards", + "children": [], + "url": "https://2023.antflix.net#divider_70_III" + }, + { + "body": "Where a stage lighting hoist is listed as a complete assembly and contains an integral cable-handling system and cable to connect a moving wiring device to a fixed junction box for connection to permanent wiring, the extra-hard usage requirement of 520.44(C)(1) shall not apply. [520.40](https://2023.antflix.net#520.40)", + "displayTitle": "520.40 Stage Lighting Hoists", + "children": [], + "url": "https://2023.antflix.net#520.40" + }, + { + "displayTitle": "520.41 Circuit Loads", + "children": [ + { + "body": "Footlights, border lights, and proscenium sidelights shall be arranged so that no branch circuit supplying such equipment carries a load exceeding 20 amperes. [520.41_(A)](https://2023.antflix.net#520.41_(A))", + "displayTitle": "(A) Circuits Rated 20 Amperes or Less", + "children": [], + "url": "https://2023.antflix.net#520.41_(A)" + }, + { + "body": "Where only heavy-duty lampholders are used, such circuits shall be permitted to comply with Article 210 for circuits supplying heavy-duty lampholders. [520.41_(B)](https://2023.antflix.net#520.41_(B))", + "displayTitle": "(B) Circuits Rated Greater Than 20 Amperes", + "children": [], + "url": "https://2023.antflix.net#520.41_(B)" + } + ], + "url": "https://2023.antflix.net#520.41" + }, + { + "body": "Foot, border, proscenium, or portable strip lights and connector strips shall be wired with conductors that have insulation suitable for the temperature at which the conductors are operated, but not less than 125\u00b0C (257\u00b0F). The ampacity of the 125\u00b0C (257\u00b0F) conductors shall be that of 60\u00b0C (140\u00b0F) conductors. All drops from connector strips shall be 90\u00b0C (194\u00b0F) wire sized to the ampacity of 60\u00b0C (140\u00b0F) cords and cables with no more than 150 mm (6 in.) of conductor extending into the connector strip. Section 310.15(C)(1) shall not apply. Informational Note: See Table 310.4(1) for conductor types. [520.42](https://2023.antflix.net#520.42)", + "displayTitle": "520.42 Conductor Insulation", + "children": [], + "url": "https://2023.antflix.net#520.42" + }, + { + "displayTitle": "520.43 Footlights", + "children": [ + { + "body": "Where metal trough construction is employed for footlights, the trough containing the circuit conductors shall be made of sheet metal not lighter than 0.81 mm (0.032 in.) and treated to prevent oxidation. Lampholder terminals shall be kept at least 13 mm (1/2 in.) from the metal of the trough. The circuit conductors shall be soldered to the lampholder terminals. [520.43_(A)](https://2023.antflix.net#520.43_(A))", + "displayTitle": "(A) Metal Trough Construction", + "children": [], + "url": "https://2023.antflix.net#520.43_(A)" + }, + { + "body": "Where the metal trough construction specified in 520.43(A) is not used, footlights shall consist of individual outlets with lampholders wired with rigid metal conduit, intermediate metal conduit, or flexible metal conduit, Type MC cable, or mineral-insulated, metal-sheathed cable. The circuit conductors shall be soldered to the lampholder terminals. [520.43_(B)](https://2023.antflix.net#520.43_(B))", + "displayTitle": "(B) Other-Than-Metal Trough Construction", + "children": [], + "url": "https://2023.antflix.net#520.43_(B)" + }, + { + "body": "Disappearing footlights shall be arranged so that the current supply is automatically disconnected when the footlights are replaced in the storage recesses designed for them. [520.43_(C)](https://2023.antflix.net#520.43_(C))", + "displayTitle": "(C) Disappearing Footlights", + "children": [], + "url": "https://2023.antflix.net#520.43_(C)" + } + ], + "url": "https://2023.antflix.net#520.43" + }, + { + "displayTitle": "520.44 Borders, Proscenium Sidelights, Drop Boxes, and Connector Strips", + "children": [ + { + "body": "Borders and proscenium sidelights shall be as follows: Constructed as specified in 520.43Suitably stayed and supportedDesigned so that the flanges of the reflectors or other guards protect the lamps from mechanical damage and from accidental contact with scenery or other combustible material [520.44_(A)](https://2023.antflix.net#520.44_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#520.44_(A)" + }, + { + "body": "Connector strips and drop boxes shall be as follows: Suitably stayed and supportedListed as stage and studio wiring devices [520.44_(B)](https://2023.antflix.net#520.44_(B))", + "displayTitle": "(B) Connector Strips and Drop Boxes", + "children": [], + "url": "https://2023.antflix.net#520.44_(B)" + }, + { + "displayTitle": "(C) Cords and Cables for Border Lights, Drop Boxes, and Connector Strips", + "children": [ + { + "body": "Cords and cables for supply to border lights, drop boxes, and connector strips shall be listed for extra-hard usage. The cords and cables shall be suitably supported. Such cords and cables shall be employed only where flexible conductors are necessary. Ampacity of the conductors shall be as provided in 400.5. [520.44_(C)_(1)](https://2023.antflix.net#520.44_(C)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#520.44_(C)_(1)" + }, + { + "body": "Listed multiconductor extra-hard usage type cords and cables not in direct contact with equipment containing heat-producing elements shall be permitted to have their ampacity determined by Table 520.44(C)(2)(1). Maximum load current in any conductor with an ampacity determined by Table 520.44(C)(2)(1) shall not exceed the values in Table 520.44(C)(2)(1).Table 520.44(C)(2)(1) Ampacity of Listed Extra-Hard Usage Cords and Cables with Temperature Ratings of 75\u00b0C (167\u00b0F) and 90\u00b0C (194\u00b0F) [Based on Ambient Temperature of 30\u00b0C (86\u00b0F)] Size(AWG) Temperature Rating of Cords and Cables MaximumRating ofOvercurrentDevice 75\u00b0C(167\u00b0F) 90\u00b0C(194\u00b0F) 14 24 28 15 12 32 35 20 10 41 47 25 8 57 65 35 6 77 87 45 4 101 114 60 2 133 152 80 Note: Ampacity shown is the ampacity for multiconductor cords and cables where only three copper conductors are current-carrying in accordance with 400.5. If the number of current-carrying conductors in a cord or cable exceeds three and the load diversity is 50 percent or less, the ampacity of each conductor shall be reduced as shown in Table 520.44(C)(2)(2):Informational Note: For the purposes of Table 520.44(C)(2)(1), load diversity is the percentage of the total current of all simultaneously energized circuits fed by the cable to the sum of the ampacities of all pairs of circuit conductors in that cable. Table 520.44(C)(2)(2) Ampacity Adjustment Factors for More Than Three Current-Carrying Conductors in a Cord or Cable Where Load Diversity Is 50 Percent or Less Number of Conductors Percent of Ampacity Value in Table 520.44(C)(2)(a) 4\u20146 80 7\u201424 70 25\u201442 60 43 and above 50 Note: Ultimate insulation temperature. In no case shall conductors be associated together in such a way with respect to the kind of circuit, the wiring method used, or the number of conductors such that the temperature limit of the conductors is exceeded. A neutral conductor that carries only the unbalanced current from other conductors of the same circuit need not be considered as a current-carrying conductor. In a 3-wire circuit consisting of two-phase conductors and the neutral conductor of a 4-wire, 3-phase, wye-connected system, the neutral conductor carries approximately the same current as the line-to-neutral currents of the other conductors and shall be considered to be a current-carrying conductor. On a 4-wire, 3-phase wye circuit where the major portion of the load consists of nonlinear loads, there are harmonic currents in the neutral conductor. Therefore, the neutral conductor shall be considered to be a current-carrying conductor. [520.44_(C)_(2)](https://2023.antflix.net#520.44_(C)_(2))", + "displayTitle": "(2) Cords and Cables Not in Contact With Heat-Producing Equipment", + "children": [], + "url": "https://2023.antflix.net#520.44_(C)_(2)" + }, + { + "body": "Neutral conductors shall be white without stripe or shall be identified by a distinctive white marking at their terminations. Equipment grounding conductors shall be green with or without yellow stripe or shall be identified by a distinctive green marking at their terminations. [520.44_(C)_(3)](https://2023.antflix.net#520.44_(C)_(3))", + "displayTitle": "(3) Identification of Conductors in Multiconductor Extra-Hard-Usage Cords and Cables", + "children": [], + "url": "https://2023.antflix.net#520.44_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#520.44_(C)" + } + ], + "url": "https://2023.antflix.net#520.44" + }, + { + "body": "Receptacles for electrical equipment on stages shall be rated in amperes. Conductors supplying receptacles shall be in accordance with Articles 310 and 400. [520.45](https://2023.antflix.net#520.45)", + "displayTitle": "520.45 Receptacles", + "children": [], + "url": "https://2023.antflix.net#520.45" + }, + { + "body": "Receptacles for the connection of portable stage-lighting equipment shall be pendant or mounted in pockets or enclosures and shall comply with 520.45. Supply cables for connector strips and drop boxes shall be as specified in 520.44(C). [520.46](https://2023.antflix.net#520.46)", + "displayTitle": "520.46 Connector Strips, Drop Boxes, Floor Pockets, and Other Outlet Enclosures", + "children": [], + "url": "https://2023.antflix.net#520.46" + }, + { + "body": "Lamps (bare bulbs) installed in backstage and ancillary areas where they can come in contact with scenery shall be located and guarded so as to be free from physical damage and shall provide an air space of not less than 50 mm (2 in.) between such lamps and any combustible material. Exception: Decorative lamps installed in scenery shall not be considered to be backstage lamps for the purpose of this section. [520.47](https://2023.antflix.net#520.47)", + "displayTitle": "520.47 Backstage Lamps (Bare Bulbs)", + "children": [], + "url": "https://2023.antflix.net#520.47" + }, + { + "body": "Curtain machines shall be listed. [520.48](https://2023.antflix.net#520.48)", + "displayTitle": "520.48 Curtain Machines", + "children": [], + "url": "https://2023.antflix.net#520.48" + }, + { + "body": "Where stage smoke ventilators are released by an electrical device, the circuit operating the device shall be normally closed and shall be controlled by at least two externally operable switches, one switch being placed at a readily accessible location on stage and the other where designated by the authority having jurisdiction. The device shall be designed for the full voltage of the circuit to which it is connected, no resistance being inserted. The device shall be enclosed in a metal box having a door that shall remain closed except during service to the equipment. [520.49](https://2023.antflix.net#520.49)", + "displayTitle": "520.49 Smoke Ventilator Control", + "children": [], + "url": "https://2023.antflix.net#520.49" + }, + { + "displayTitle": "Part IV Portable Switchboards on Stage", + "children": [], + "url": "https://2023.antflix.net#divider_22_IV" + }, + { + "body": "A panel designed to allow for road show connection of portable stage switchboards to fixed lighting outlets by means of permanently installed supplementary circuits. The panel, supplementary circuits, and outlets shall comply with 520.50(A) through (D). [520.50](https://2023.antflix.net#520.50)", + "displayTitle": "520.50 Road Show Connection Panel (A Type of Patch Panel)", + "children": [ + { + "body": "Circuits shall originate from grounding-type polarized inlets of current and voltage rating that match the fixed-load receptacle. [520.50_(A)](https://2023.antflix.net#520.50_(A))", + "displayTitle": "(A) Load Circuits", + "children": [], + "url": "https://2023.antflix.net#520.50_(A)" + }, + { + "body": "Circuits that are transferred between fixed and portable switchboards shall have all circuit conductors transferred simultaneously. [520.50_(B)](https://2023.antflix.net#520.50_(B))", + "displayTitle": "(B) Circuit Transfer", + "children": [], + "url": "https://2023.antflix.net#520.50_(B)" + }, + { + "body": "The supply devices of these supplementary circuits shall be protected by branch-circuit overcurrent protective devices. Each supplementary circuit, within the road show connection panel and theater, shall be protected by branch-circuit overcurrent protective devices installed within the road show connection panel. [520.50_(C)](https://2023.antflix.net#520.50_(C))", + "displayTitle": "(C) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#520.50_(C)" + }, + { + "body": "Panel construction shall be in accordance with Article 408. [520.50_(D)](https://2023.antflix.net#520.50_(D))", + "displayTitle": "(D) Enclosure", + "children": [], + "url": "https://2023.antflix.net#520.50_(D)" + } + ], + "url": "https://2023.antflix.net#520.50" + }, + { + "body": "Portable switchboards shall be supplied only from power outlets of sufficient voltage and ampere rating. Such power outlets shall include only externally operable, enclosed fused switches or circuit breakers mounted on stage or at the permanent switchboard in locations readily accessible from the stage floor. Provisions for connection of an equipment grounding conductor shall be provided. For the purposes of ampacity adjustment, the requirements of 520.27(B) shall apply. [520.51](https://2023.antflix.net#520.51)", + "displayTitle": "520.51 Supply", + "children": [], + "url": "https://2023.antflix.net#520.51" + }, + { + "body": "Portable switchboards shall contain overcurrent protection for branch circuits. The requirements of 210.23 shall not apply. [520.52](https://2023.antflix.net#520.52)", + "displayTitle": "520.52 Overcurrent Protection for Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#520.52" + }, + { + "body": "Portable stage switchboards shall be listed and shall comply with 520.53(A) through (E). The load terminal location requirements in 408.18(C)(1), (C)(2), and (C)(3) shall not apply to portable stage switchboards. [520.53](https://2023.antflix.net#520.53)", + "displayTitle": "520.53 Construction", + "children": [ + { + "body": "A pilot light shall be provided for each ungrounded conductor feeding the switchboard. The pilot light(s) shall be connected to the incoming feeder so that operation of the main overcurrent protective device or master switch shall not affect the operation of the pilot light(s). [520.53_(A)](https://2023.antflix.net#520.53_(A))", + "displayTitle": "(A) Pilot Light", + "children": [], + "url": "https://2023.antflix.net#520.53_(A)" + }, + { + "body": "In portable switchboard equipment designed for use with 3-phase, 4-wire with ground supply, the current rating of the supply neutral terminal, and the ampacity of its associated busbar or wiring, or both, shall have an ampacity equal to at least twice the ampacity of the largest ungrounded supply terminal. Exception: Where portable switchboard equipment is specifically constructed, and identified to be internally converted in the field, in an approved, manner, from use with a balanced 3-phase, 4-wire with ground supply to a balanced, single-phase, 3-wire with ground supply, the supply neutral terminal and its associated busbar, wiring, or both, shall have an ampacity equal to at least that of the largest ungrounded single-phase supply terminal. [520.53_(B)](https://2023.antflix.net#520.53_(B))", + "displayTitle": "(B) Neutral Terminal", + "children": [], + "url": "https://2023.antflix.net#520.53_(B)" + }, + { + "body": "Single-pole separable connectors shall comply with 406.13. Sections 400.14, 406.7, and 406.8 shall not apply to listed single-pole separable connectors and single-conductor cable assemblies utilizing listed single-pole separable connectors. Where paralleled sets of current-carrying, single-pole separable connectors are provided as input devices, they shall be prominently labeled with a warning indicating the presence of internal parallel connections. [520.53_(C)](https://2023.antflix.net#520.53_(C))", + "displayTitle": "(C) Single-Pole Separable Connectors", + "children": [], + "url": "https://2023.antflix.net#520.53_(C)" + }, + { + "body": "Where a portable stage switchboard contains a feed-through outlet of the same rating as its supply inlet, the feed-through outlet shall not require overcurrent protection in the switchboard. [520.53_(D)](https://2023.antflix.net#520.53_(D))", + "displayTitle": "(D) Supply Feed-Through", + "children": [], + "url": "https://2023.antflix.net#520.53_(D)" + }, + { + "body": "All conductors other than busbars within the switchboard enclosure shall be stranded. [520.53_(E)](https://2023.antflix.net#520.53_(E))", + "displayTitle": "(E) Interior Conductors", + "children": [], + "url": "https://2023.antflix.net#520.53_(E)" + } + ], + "url": "https://2023.antflix.net#520.53" + }, + { + "displayTitle": "520.54 Supply Conductors", + "children": [ + { + "body": "The supply to a portable stage switchboard shall be by means of listed extra-hard usage cords or cables. The supply cords or cables shall terminate within the switchboard enclosure in an externally operable fused master switch or circuit breaker or in an identified connector assembly. The supply cords or cable (and connector assembly) shall have current ratings not less than the total load connected to the switchboard and shall be protected by overcurrent devices. [520.54_(A)](https://2023.antflix.net#520.54_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#520.54_(A)" + }, + { + "body": "The power supply conductors for portable stage switchboards utilizing solid-state phase control dimmers shall be sized considering the neutral conductor as a current-carrying conductor for ampacity adjustment purposes. The power supply conductors for portable stage switchboards utilizing only solid-state sine wave dimmers shall be sized considering the neutral conductor as a non-current carrying conductor for ampacity adjustment purposes. [520.54_(B)](https://2023.antflix.net#520.54_(B))", + "displayTitle": "(B) Conductor Sizing", + "children": [], + "url": "https://2023.antflix.net#520.54_(B)" + }, + { + "body": "Single-conductor portable supply cable sets shall be not smaller than 2 AWG conductors. The equipment grounding conductor shall not be smaller than 6 AWG conductor. Single-conductor grounded neutral cables for a supply shall be sized in accordance with 520.54(J). Where single conductors are paralleled for increased ampacity, the paralleled conductors shall be of the same length and size. Single-conductor supply cables shall be grouped together but not bundled. The equipment grounding conductor shall be permitted to be of a different type if it meets the other requirements of this section, and it shall be permitted to be reduced in size in accordance with 250.122. Grounded (neutral) and equipment grounding conductors shall be identified in accordance with 200.6, 250.119, and 310.6. Grounded conductors shall be permitted to be identified by marking at least the first 150 mm (6 in.) from both ends of each length of conductor with white or gray. Equipment grounding conductors shall be permitted to be identified by marking at least the first 150 mm (6 in.) from both ends of each length of conductor with green or green with yellow stripes. Where more than one nominal voltage exists within the same premises, each ungrounded conductor shall be identified by system. [520.54_(C)](https://2023.antflix.net#520.54_(C))", + "displayTitle": "(C) Single-Conductor Cables", + "children": [], + "url": "https://2023.antflix.net#520.54_(C)" + }, + { + "body": "Where supply conductors do not exceed 3 m (10 ft) in length between supply and switchboard or supply and a subsequent overcurrent device, the supply conductors shall be permitted to be reduced in size where all of the following conditions are met: The ampacity of the supply conductors shall be at least one-quarter of the current rating of the supply overcurrent protective device.The supply conductors shall terminate in a single over-current protective device that will limit the load to the ampacity of the supply conductors. This single overcurrent device shall be permitted to supply additional over-current devices on its load side.The supply conductors shall not penetrate walls, floors, or ceilings or be run through doors or traffic areas. The supply conductors shall be protected from physical damage.The supply conductors shall be suitably terminated in an approved manner.Conductors shall be continuous without splices or connectors.Conductors shall not be bundled.Conductors shall be supported above the floor in an approved manner. [520.54_(D)](https://2023.antflix.net#520.54_(D))", + "displayTitle": "(D) Supply Conductors Not Over 3 m (10 ft) Long", + "children": [], + "url": "https://2023.antflix.net#520.54_(D)" + }, + { + "body": "Where supply conductors do not exceed 6 m (20 ft) in length between supply and switchboard or supply and a subsequent overcurrent protection device, the supply conductors shall be permitted to be reduced in size where all of the following conditions are met: The ampacity of the supply conductors shall be at least one-half of the current rating of the supply overcurrent protective device.The supply conductors shall terminate in a single over-current protective device that limits the load to the ampacity of the supply conductors. This single overcurrent device shall be permitted to supply additional over-current devices on its load side.The supply conductors shall not penetrate walls, floors, or ceilings or be run through doors or traffic areas. The supply conductors shall be adequately protected from physical damage.The supply conductors shall be suitably terminated in an approved manner.The supply conductors shall be supported in an approved manner at least 2.1 m (7 ft) above the floor except at terminations.The supply conductors shall not be bundled.Tap conductors shall be in unbroken lengths. [520.54_(E)](https://2023.antflix.net#520.54_(E))", + "displayTitle": "(E) Supply Conductors Not Over 6 m (20 ft) Long", + "children": [], + "url": "https://2023.antflix.net#520.54_(E)" + }, + { + "body": "Supply conductors not reduced in size under 520.54(D) or (E) shall be permitted to pass through holes in walls specifically designed for the purpose. If penetration is through the fire-resistant\u2014rated wall, it shall be in accordance with 300.21. [520.54_(F)](https://2023.antflix.net#520.54_(F))", + "displayTitle": "(F) Supply Conductors Not Reduced in Size", + "children": [], + "url": "https://2023.antflix.net#520.54_(F)" + }, + { + "body": "All supply conductors and connectors shall be protected against physical damage by an approved means. This protection shall not be required to be raceways. [520.54_(G)](https://2023.antflix.net#520.54_(G))", + "displayTitle": "(G) Protection of Supply Conductors and Connectors", + "children": [], + "url": "https://2023.antflix.net#520.54_(G)" + }, + { + "body": "Where connectors are used in a supply conductor, there shall be a maximum number of three interconnections (mated connector pairs) where the total length from supply to switchboard does not exceed 30 m (100 ft). In cases where the total length from supply to switchboard exceeds 30 m (100 ft), one additional interconnection shall be permitted for each additional 30 m (100 ft) of supply conductor. [520.54_(H)](https://2023.antflix.net#520.54_(H))", + "displayTitle": "(H) Number of Supply Interconnections", + "children": [], + "url": "https://2023.antflix.net#520.54_(H)" + }, + { + "body": "Where single-pole portable cable connectors are used, they shall be listed and of the locking type. Sections 406.7 and 406.8 shall not apply to listed single-pole separable connectors and single-conductor cable assemblies utilizing listed single-pole separable connectors. [520.54_(I)](https://2023.antflix.net#520.54_(I))", + "displayTitle": "(I) Single-Pole Separable Connectors", + "children": [], + "url": "https://2023.antflix.net#520.54_(I)" + }, + { + "body": "Supply neutral conductors shall comply with 520.54(J)(1) and (J)(2). [520.54_(J)](https://2023.antflix.net#520.54_(J))", + "displayTitle": "(J) Supply Neutral Conductor", + "children": [ + { + "body": "Grounded neutral conductors shall be permitted to be identified by marking at least the first 150 mm (6 in.) from both ends of each length of conductor with white or gray. [520.54_(J)_(1)](https://2023.antflix.net#520.54_(J)_(1))", + "displayTitle": "(1) Marking", + "children": [], + "url": "https://2023.antflix.net#520.54_(J)_(1)" + }, + { + "body": "Where single-conductor feeder cables not installed in raceways are used on multiphase circuits feeding portable stage switchboards containing solid-state phase-control dimmers, the grounded neutral conductor shall have an ampacity of at least 130 percent of the ungrounded circuit conductors feeding the portable stage switchboard. Where such feeders are supplying only solid-state sine wave dimmers, the grounded neutral conductor shall have an ampacity of at least 100 percent of the ungrounded circuit conductors feeding the portable stage switchboard. [520.54_(J)_(2)](https://2023.antflix.net#520.54_(J)_(2))", + "displayTitle": "(2) Conductor Sizing", + "children": [], + "url": "https://2023.antflix.net#520.54_(J)_(2)" + } + ], + "url": "https://2023.antflix.net#520.54_(J)" + }, + { + "body": "The routing of portable supply conductors, the making and breaking of supply connectors and other supply connections, and the energization and de-energization of supply services shall be performed by qualified persons, and portable switchboards shall be so marked, indicating this requirement in a permanent and conspicuous manner. Exception: A portable switchboard shall be permitted, to be connected to a permanently installed supply receptacle by other than qualified persons provided that the supply receptacle is protected for its current rating by an overcurrent device of not greater than 150 amperes, and where the receptacle, interconnection, and switchboard comply with all of the following: (1) They employ listed multipole connectors for every supply interconnection. (2) They prevent access to all supply connections by the general public. (3) They employ listed extra-hard usage multiconductor cords or cables with an ampacity not less than the load and not less than the ampere rating of the connectors. [520.54_(K)](https://2023.antflix.net#520.54_(K))", + "displayTitle": "(K) Qualified Persons", + "children": [], + "url": "https://2023.antflix.net#520.54_(K)" + } + ], + "url": "https://2023.antflix.net#520.54" + }, + { + "displayTitle": "Part V Portable Stage Equipment Other Than Switchboards", + "children": [], + "url": "https://2023.antflix.net#divider_17_V" + }, + { + "body": "Arc lamps, including enclosed arc lamps and associated ballasts, shall be listed. Interconnecting cord sets and interconnecting cords and cables shall be extra-hard usage type and listed. [520.61](https://2023.antflix.net#520.61)", + "displayTitle": "520.61 Arc Lamps", + "children": [], + "url": "https://2023.antflix.net#520.61" + }, + { + "body": "Portable power distribution units shall comply with the requirements of 520.62(A) and (B). [520.62](https://2023.antflix.net#520.62)", + "displayTitle": "520.62 Portable Power Distribution Units", + "children": [ + { + "body": "Portable power distribution units shall be listed. [520.62_(A)](https://2023.antflix.net#520.62_(A))", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#520.62_(A)" + }, + { + "body": "Portable power distribution equipment fed by single-conductor feeder systems shall comply with the requirements of 520.53(C) and (D) and 520.54. [520.62_(B)](https://2023.antflix.net#520.62_(B))", + "displayTitle": "(B) Single-Conductor Feeder Systems", + "children": [], + "url": "https://2023.antflix.net#520.62_(B)" + } + ], + "url": "https://2023.antflix.net#520.62" + }, + { + "displayTitle": "520.63 Bracket Fixture Wiring", + "children": [ + { + "body": "Brackets for use on scenery shall be wired internally, and the fixture stem shall be carried through to the back of the scenery where a bushing shall be placed on the end of the stem. Externally wired brackets or other fixtures shall be permitted where wired with cords designed for hard usage that extend through scenery and without joint or splice in canopy of fixture back and terminate in an approved-type stage connector located, where practical, within 450 mm (18 in.) of the fixture. [520.63_(A)](https://2023.antflix.net#520.63_(A))", + "displayTitle": "(A) Bracket Wiring", + "children": [], + "url": "https://2023.antflix.net#520.63_(A)" + }, + { + "body": "Fixtures shall be securely fastened in place. [520.63_(B)](https://2023.antflix.net#520.63_(B))", + "displayTitle": "(B) Mounting", + "children": [], + "url": "https://2023.antflix.net#520.63_(B)" + } + ], + "url": "https://2023.antflix.net#520.63" + }, + { + "body": "Portable strips shall be constructed in accordance with the requirements for border lights and proscenium sidelights in 520.44(A). The supply cable shall be protected by bushings where it passes through metal and shall be arranged so that tension on the cable will not be transmitted to the connections. Informational Note No. 1: See 520.42 for wiring of portable strips. Informational Note No. 2: See 520.68(A)(4) for insulation types required on single conductors. [520.64](https://2023.antflix.net#520.64)", + "displayTitle": "520.64 Portable Strips", + "children": [], + "url": "https://2023.antflix.net#520.64" + }, + { + "body": "Joints in festoon wiring shall be staggered. Where such lampholders have terminals of a type that puncture the insulation and make contact with the conductors, they shall be attached only to conductors of the stranded type. Lamps enclosed in lanterns or similar devices of combustible material shall be equipped with guards. [520.65](https://2023.antflix.net#520.65)", + "displayTitle": "520.65 Festoons", + "children": [], + "url": "https://2023.antflix.net#520.65" + }, + { + "body": "Electrical devices used for simulating lightning, waterfalls, and the like shall be constructed and located so that flames, sparks, or hot particles cannot come in contact with combustible material. [520.66](https://2023.antflix.net#520.66)", + "displayTitle": "520.66 Special Effects", + "children": [], + "url": "https://2023.antflix.net#520.66" + }, + { + "body": "Multipole branch-circuit cable connectors, male and female, for flexible conductors shall be constructed so that tension on the cord or cable is not transmitted to the connections. The female half shall be attached to the load end of the power supply cord or cable. The connector shall be rated in amperes and designed so that differently rated devices cannot be connected together; however, a 20-ampere T-slot receptacle shall be permitted to accept a 15-ampere attachment plug of the same voltage rating. Alternating-current multipole connectors shall be polarized and comply with 406.7 and 406.10. Informational Note: See 400.14 for pull at terminals. [520.67](https://2023.antflix.net#520.67)", + "displayTitle": "520.67 Multipole Branch-Circuit Cable Connectors", + "children": [], + "url": "https://2023.antflix.net#520.67" + }, + { + "displayTitle": "520.68 Conductors for Portables", + "children": [ + { + "displayTitle": "(A) Conductor Type", + "children": [ + { + "body": "Flexible conductors, including cable extensions, used to supply portable stage equipment shall be listed extra-hard usage cords or cables. [520.68_(A)_(1)](https://2023.antflix.net#520.68_(A)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#520.68_(A)_(1)" + }, + { + "body": "Listed, hard usage (junior hard service) cord or cable shall be permitted where all of the following conditions are met: The cord or cable is protected from physical damage by attachment over its entire length to a pipe, tower, truss, scaffold, or other substantial support structure, or installed in a location that inherently prevents physical damage to the cord.The cord or cable is connected to a branch circuit protected by an overcurrent protective device rated at not over 20 amperes.The cord or cable does not exceed 30 m (100 ft) in length. [520.68_(A)_(2)](https://2023.antflix.net#520.68_(A)_(2))", + "displayTitle": "(2) Protected Applications", + "children": [], + "url": "https://2023.antflix.net#520.68_(A)_(2)" + }, + { + "body": "Listed, hard usage cord shall be permitted to supply stand lamps where the cord is not subject to physical damage and is protected by an overcurrent device rated at not over 20 amperes. [520.68_(A)_(3)](https://2023.antflix.net#520.68_(A)_(3))", + "displayTitle": "(3) Stand Lamps", + "children": [], + "url": "https://2023.antflix.net#520.68_(A)_(3)" + }, + { + "body": "Listed hard usage supply cords shall be permitted to supply luminaires if all of the following conditions are met: The supply cord is not longer than 2.0 m (6.6 ft).The supply cord is attached at one end to the luminaire or a luminaire-specific listed connector that mates with a panel-mounted inlet on the body of the luminaire.The supply cord is protected by an overcurrent protective device of not more than 20 amperes.The luminaire is listed.The supply cord is not subject to physical damage. [520.68_(A)_(4)](https://2023.antflix.net#520.68_(A)_(4))", + "displayTitle": "(4) Luminaire Supply Cords", + "children": [], + "url": "https://2023.antflix.net#520.68_(A)_(4)" + }, + { + "body": "A special assembly of conductors in sleeving not longer than 1.0 m (3.3 ft) shall be permitted to be employed in lieu of flexible cord if the individual wires are stranded and rated not less than 125\u00b0C (257\u00b0F) and the outer sleeve is glass fiber with a wall thickness of at least 0.635 mm (0.025 in.). Portable stage equipment requiring flexible supply conductors with a higher temperature rating where one end is permanently attached to the equipment shall be permitted to employ alternate conductors as determined by a qualified testing laboratory and recognized test standards. [520.68_(A)_(5)](https://2023.antflix.net#520.68_(A)_(5))", + "displayTitle": "(5) High-Temperature Applications", + "children": [], + "url": "https://2023.antflix.net#520.68_(A)_(5)" + }, + { + "body": "Listed, hard usage (junior hard service) cords shall be permitted in breakout assemblies where all of the following conditions are met: The cords are utilized to connect between a single multi-pole connector containing two or more branch circuits and multiple 2-pole, 3-wire connectors.The longest cord in the breakout assembly does not exceed 6.0 m (20 ft).The breakout assembly is protected from physical damage by attachment over its entire length to a pipe, truss, tower, scaffold, or other substantial support structure.All branch circuits feeding the breakout assembly are protected by overcurrent devices rated at not over 20 amperes. [520.68_(A)_(6)](https://2023.antflix.net#520.68_(A)_(6))", + "displayTitle": "(6) Breakouts", + "children": [], + "url": "https://2023.antflix.net#520.68_(A)_(6)" + } + ], + "url": "https://2023.antflix.net#520.68_(A)" + }, + { + "body": "The ampacity of conductors shall be as given in 400.5, except multiconductor, listed, extra-hard usage portable cords that are not in direct contact with equipment containing heat-producing elements shall be permitted to have their ampacity determined by Table 520.44(C)(2)(1). Maximum load current in any conductor with an ampacity determined by Table 520.44(C)(2)(1) shall not exceed the values in Table 520.44(C)(2)(1). Where the ampacity adjustment factors of Table 520.44(C)(2)(2) are applied for more than three current-carrying conductors in a portable cord, the load diversity shall be 50 percent or less. Exception: Where alternate conductors are allowed in 520.68(A)(5), their ampacity shall be as given in the appropriate table in this Code [or the types of conductors employed. [520.68_(B)](https://2023.antflix.net#520.68_(B))", + "displayTitle": "(B) Conductor Ampacity", + "children": [], + "url": "https://2023.antflix.net#520.68_(B)" + }, + { + "body": "Overcurrent protection of conductors for portables shall comply with 240.5. [520.68_(C)](https://2023.antflix.net#520.68_(C))", + "displayTitle": "(C) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#520.68_(C)" + }, + { + "body": "Special-purpose multicircuit cable systems shall comply with the following requirements: Branch circuits shall be rated at not more than 20 amperes and not more than 150 volts to ground.Trunk cable types shall be extra-hard usage (hard service) or hard usage (junior hard service).The ampacity of trunk cables shall be determined in accordance with Table 520.44(C)(2)(1).Trunk cables, breakout assemblies, and multicircuit enclosures shall be listed.Section 406.4(F) shall not apply to multicircuit, multipole plugs or receptacles that are part of a special-purpose multicircuit cable system.All multicircuit, multipole connectors shall be clearly marked with the voltage of the branch circuits serviced by the connector.Installation and operation shall be performed by qualified persons. [520.68_(D)](https://2023.antflix.net#520.68_(D))", + "displayTitle": "(D) Special-Purpose Multicircuit Cable Systems", + "children": [], + "url": "https://2023.antflix.net#520.68_(D)" + } + ], + "url": "https://2023.antflix.net#520.68" + }, + { + "body": "Adapters, two-fers, and other single- and multiple-circuit outlet devices shall comply with 520.69(A), (B), and (C). [520.69](https://2023.antflix.net#520.69)", + "displayTitle": "520.69 Adapters", + "children": [ + { + "body": "Each receptacle and its corresponding cable shall have the same current and voltage rating as the plug supplying it. It shall not be utilized in a stage circuit with a greater current rating. [520.69_(A)](https://2023.antflix.net#520.69_(A))", + "displayTitle": "(A) No Reduction in Current Rating", + "children": [], + "url": "https://2023.antflix.net#520.69_(A)" + }, + { + "body": "All connectors shall be wired in accordance with 520.67. [520.69_(B)](https://2023.antflix.net#520.69_(B))", + "displayTitle": "(B) Connectors", + "children": [], + "url": "https://2023.antflix.net#520.69_(B)" + }, + { + "body": "Conductors for adapters and two-fers shall be listed extra-hard usage or listed hard usage (junior hard service) cord. Hard usage (junior hard service) cord shall be restricted in overall length to 2.0 m (6.6 ft). [520.69_(C)](https://2023.antflix.net#520.69_(C))", + "displayTitle": "(C) Conductor Type", + "children": [], + "url": "https://2023.antflix.net#520.69_(C)" + } + ], + "url": "https://2023.antflix.net#520.69" + }, + { + "displayTitle": "Part VI Dressing Rooms, Dressing Areas, and Makeup Areas", + "children": [], + "url": "https://2023.antflix.net#divider_12_VI" + }, + { + "body": "Pendant lampholders shall not be installed in dressing or makeup rooms. [520.71](https://2023.antflix.net#520.71)", + "displayTitle": "520.71 Pendant Lampholders", + "children": [], + "url": "https://2023.antflix.net#520.71" + }, + { + "body": "All exposed lamps in dressing or makeup areas including rooms where they are less than 2.5 m (8 ft) from the floor shall be equipped with open-end guards riveted to the outlet box cover or otherwise sealed or locked in place. Recessed lamps shall not be required to be equipped with guards. [520.72](https://2023.antflix.net#520.72)", + "displayTitle": "520.72 Lamp Guards", + "children": [], + "url": "https://2023.antflix.net#520.72" + }, + { + "body": "All luminaires, lampholders, and any receptacles adjacent to the mirror(s) and above the dressing or makeup counter(s) installed in dressing or makeup rooms shall be controlled by wall switches installed in the dressing or makeup room(s). Other outlets installed in the dressing or makeup rooms shall not be required to be switched. [520.73](https://2023.antflix.net#520.73)", + "displayTitle": "520.73 Switches Required", + "children": [], + "url": "https://2023.antflix.net#520.73" + }, + { + "body": "Each switch required in 520.73 shall be provided with a pilot light located outside of and adjacent to the door of the room being controlled to indicate when the circuit is energized. Each pilot light shall be permanently identified indicating a description of the circuit controlled. Pilot lights shall be neon, LED, or other extended-life lamp. Pilot lights shall be recessed or provided with a mechanical guard. [520.74](https://2023.antflix.net#520.74)", + "displayTitle": "520.74 Pilot Lights Required", + "children": [], + "url": "https://2023.antflix.net#520.74" + }, + { + "displayTitle": "Part VII Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#divider_11_VII" + }, + { + "body": "All metal raceways and metal-sheathed cables shall be connected to an equipment grounding conductor. The metal frames and enclosures of all equipment, including border lights and portable luminaires, shall be connected to an equipment grounding conductor. [520.81](https://2023.antflix.net#520.81)", + "displayTitle": "520.81 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#520.81" + } + ], + "url": "https://2023.antflix.net#520" + }, + { + "displayTitle": "Article 522 Control Systems for Permanent Amusement Attractions", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_80_I" + }, + { + "body": "This article covers the installation of control circuit power sources and control circuit conductors for electrical equipment, including associated control wiring in or on all structures, that are an integral part of a permanent amusement attraction. [522.1](https://2023.antflix.net#522.1)", + "displayTitle": "522.1 Scope", + "children": [], + "url": "https://2023.antflix.net#522.1" + }, + { + "body": "Control voltage shall be a maximum of 150 volts, nominal, ac to ground or 300 volts dc to ground. [522.5](https://2023.antflix.net#522.5)", + "displayTitle": "522.5 Voltage Limitations", + "children": [], + "url": "https://2023.antflix.net#522.5" + }, + { + "body": "The conditions of maintenance and supervision shall ensure that only qualified persons service the permanent amusement attraction. [522.7](https://2023.antflix.net#522.7)", + "displayTitle": "522.7 Maintenance", + "children": [], + "url": "https://2023.antflix.net#522.7" + }, + { + "displayTitle": "Part II Control Circuits", + "children": [], + "url": "https://2023.antflix.net#divider_80_II" + }, + { + "displayTitle": "522.10 Power Sources for Control Circuits", + "children": [ + { + "body": "Power-limited control circuits shall be supplied from a source that has a rated output of not more than 30 volts and 1000 volt-amperes. [522.10_(A)](https://2023.antflix.net#522.10_(A))", + "displayTitle": "(A) Power-Limited Control Circuits", + "children": [ + { + "body": "Transformers used to supply power-limited control circuits shall comply with the applicable sections within Parts I and II of Article 450. [522.10_(A)_(1)](https://2023.antflix.net#522.10_(A)_(1))", + "displayTitle": "(1) Control Transformers", + "children": [], + "url": "https://2023.antflix.net#522.10_(A)_(1)" + }, + { + "body": "Power-limited control power sources, other than transformers, shall be protected by overcurrent devices rated at not more than 167 percent of the volt-ampere rating of the source divided by the rated voltage. The fusible overcurrent devices shall not be interchangeable with fusible overcurrent devices of higher ratings. The overcurrent device shall be permitted to be an integral part of the power source. To comply with the 1000 volt-ampere limitation of 522.10(A), the maximum output of power sources, other than transformers, shall be limited to 2500 volt-amperes, and the product of the maximum current and maximum voltage shall not exceed 10,000 volt-amperes. These ratings shall be determined with any overcurrent-protective device bypassed. [522.10_(A)_(2)](https://2023.antflix.net#522.10_(A)_(2))", + "displayTitle": "(2) Other Power-Limited Control Power Sources", + "children": [], + "url": "https://2023.antflix.net#522.10_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#522.10_(A)" + }, + { + "body": "Non-power-limited control circuits shall not exceed 300 volts. The power output of the source shall not be required to be limited. [522.10_(B)](https://2023.antflix.net#522.10_(B))", + "displayTitle": "(B) Non-Power-Limited Control Circuits", + "children": [ + { + "body": "Transformers used to supply non\u2014power-limited control circuits shall comply with the applicable sections within Parts I and II of Article 450. [522.10_(B)_(1)](https://2023.antflix.net#522.10_(B)_(1))", + "displayTitle": "(1) Control Transformers", + "children": [], + "url": "https://2023.antflix.net#522.10_(B)_(1)" + }, + { + "body": "Non\u2014power-limited control power sources, other than transformers, shall be protected by overcurrent devices rated at not more than 125 percent of the volt-ampere rating of the source divided by the rated voltage. The fusible overcurrent devices shall not be interchangeable with fusible overcurrent devices of higher ratings. The overcurrent device shall be permitted to be an integral part of the power source. [522.10_(B)_(2)](https://2023.antflix.net#522.10_(B)_(2))", + "displayTitle": "(2) Other Non\u2014Power-Limited Control Power Sources", + "children": [], + "url": "https://2023.antflix.net#522.10_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#522.10_(B)" + } + ], + "url": "https://2023.antflix.net#522.10" + }, + { + "displayTitle": "Part III Control Circuit Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#divider_71_III" + }, + { + "body": "Insulated control circuit conductors shall be copper and shall be permitted to be stranded or solid. Listed multiconductor cable assemblies shall be permitted. Exception No. 1: Busbars and slip rings shall be permitted to be materials other than copper. Exception No. 2: Conductors used as specific-purpose devices, such as thermocouples and resistive thermal devices, shall be permitted to be materials other than copper. [522.20](https://2023.antflix.net#522.20)", + "displayTitle": "522.20 Conductors. Busbars, and Slip Rings", + "children": [], + "url": "https://2023.antflix.net#522.20" + }, + { + "displayTitle": "522.21 Conductor Sizing", + "children": [ + { + "body": "Conductors of size 30 AWG or larger shall be permitted within a listed component or as part of the wiring of a listed assembly. [522.21_(A)](https://2023.antflix.net#522.21_(A))", + "displayTitle": "(A) Conductors Within a Listed Component or Assembly", + "children": [], + "url": "https://2023.antflix.net#522.21_(A)" + }, + { + "body": "Conductors of size 30 AWG or larger shall be permitted in a listed and jacketed multiconductor cable within an enclosure or operator station. Conductors in a non-jacketed multiconductor cable, such as ribbon cable, shall not be smaller than 26 AWG. Single conductors shall not be smaller than 24 AWG. Exception: Single conductors 30 AWG or larger shall be permitted for jumpers and special wiring applications. [522.21_(B)](https://2023.antflix.net#522.21_(B))", + "displayTitle": "(B) Conductors Within an Enclosure or Operator Station", + "children": [], + "url": "https://2023.antflix.net#522.21_(B)" + }, + { + "body": "The size of conductors in a listed and jacketed, multiconductor cable shall not be smaller than 26 AWG. Single conductors shall not be smaller than 18 AWG and shall be installed only where part of a recognized wiring method of Chapter 3. [522.21_(C)](https://2023.antflix.net#522.21_(C))", + "displayTitle": "(C) Conductors Outside of an Enclosure or Operator Station", + "children": [], + "url": "https://2023.antflix.net#522.21_(C)" + } + ], + "url": "https://2023.antflix.net#522.21" + }, + { + "body": "Ampacities for conductors sized 16 AWG and smaller shall be as specified in Table 522.22. Table 522.22 Conductor Ampacity Based on Copper Conductors with 60\u00b0C and 75\u00b0C Insulation in an Ambient Temperature of 30\u00b0C Conductor Size(AWG) Ampacity 60\u00b0C 75\u00b0C 30 \u2014 0.5 28 \u2014 0.8 26 \u2014 1 24 2 2 22 3 3 20 5 5 18 7 7 16 10 10 Notes:For ambient temperatures other than 30\u00b0C, temperature correction factors provided in 310.15(B)(1) shall be used.Ampacity for conductors with 90\u00b0C or greater insulation shall be based on ampacities in the 75\u00b0C column. [522.22](https://2023.antflix.net#522.22)", + "displayTitle": "522.22 Conductor Ampacity", + "children": [], + "url": "https://2023.antflix.net#522.22" + }, + { + "body": "Conductors 30 AWG through 16 AWG shall have overcurrent protection in accordance with the appropriate conductor ampacity in Table 522.22. Conductors larger than 16 AWG shall have overcurrent protection in accordance with the appropriate conductor ampacity in Table 310.16. [522.23](https://2023.antflix.net#522.23)", + "displayTitle": "522.23 Overcurrent Protection for Conductors", + "children": [], + "url": "https://2023.antflix.net#522.23" + }, + { + "body": "Control circuits shall be permitted to be installed with other circuits as specified in 522.24(A) and (B). [522.24](https://2023.antflix.net#522.24)", + "displayTitle": "522.24 Conductors of Different Circuits in the Same Cable, Cable Tray, Enclosure, or Raceway", + "children": [ + { + "body": "Control circuits shall be permitted to occupy the same cable, cable tray, enclosure, or raceway without regard to whether the individual circuits are alternating current or direct current, provided all conductors are insulated for the maximum voltage of any conductor in the cable, cable tray, enclosure, or raceway. [522.24_(A)](https://2023.antflix.net#522.24_(A))", + "displayTitle": "(A) Two or More Control Circuits", + "children": [], + "url": "https://2023.antflix.net#522.24_(A)" + }, + { + "body": "Control circuits shall be permitted to be installed with power conductors as specified in 522.24(B)(1) through (B)(3). [522.24_(B)](https://2023.antflix.net#522.24_(B))", + "displayTitle": "(B) Control Circuits With Power Circuits", + "children": [ + { + "body": "Control circuits and power circuits shall be permitted to occupy the same cable, enclosure, or raceway only where the equipment powered is functionally associated. [522.24_(B)_(1)](https://2023.antflix.net#522.24_(B)_(1))", + "displayTitle": "(1) In a Cable, Enclosure, or Raceway", + "children": [], + "url": "https://2023.antflix.net#522.24_(B)_(1)" + }, + { + "body": "Control circuits and power circuits shall be permitted to be installed in factory- or field-assembled control centers. [522.24_(B)_(2)](https://2023.antflix.net#522.24_(B)_(2))", + "displayTitle": "(2) In Factory- or Field-Assembled Control Centers", + "children": [], + "url": "https://2023.antflix.net#522.24_(B)_(2)" + }, + { + "body": "Control circuits and power circuits shall be permitted to be installed as underground conductors in a manhole in accordance with one of the following: The power or control circuit conductors are in a metal-enclosed cable or Type UF cableThe conductors are permanently separated from the power conductors by a continuous fixed nonconductor, such as flexible tubing, in addition to the insulation on the wireThe conductors are permanently and effectively separated from the power conductors and securely fastened to racks, insulators, or other approved supportsIn cable trays, where the control circuit conductors and power conductors not functionally associated with them are separated by a solid fixed barrier of a material compatible with the cable tray, or where the power or control circuit conductors are in a metal-enclosed cable [522.24_(B)_(3)](https://2023.antflix.net#522.24_(B)_(3))", + "displayTitle": "(3) In a Manhole", + "children": [], + "url": "https://2023.antflix.net#522.24_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#522.24_(B)" + } + ], + "url": "https://2023.antflix.net#522.24" + }, + { + "body": "Separately derived ac circuits and systems 50 volts or greater and 2-wire dc circuits and systems 60 volts or greater shall be permitted to be ungrounded, provided that all the following conditions are met: Continuity of control power is required for orderly shutdown.Ground detectors are installed on the control system. [522.25](https://2023.antflix.net#522.25)", + "displayTitle": "522.25 Ungrounded Control Circuits", + "children": [], + "url": "https://2023.antflix.net#522.25" + }, + { + "body": "Where wet contact is likely to occur, ungrounded 2-wire direct-current control circuits shall be limited to 30 volts maximum for continuous dc or 12.4 volts peak for direct current that is interrupted at a rate of 10 to 200 Hz. [522.28](https://2023.antflix.net#522.28)", + "displayTitle": "522.28 Control Circuits in Wet Locations", + "children": [], + "url": "https://2023.antflix.net#522.28" + } + ], + "url": "https://2023.antflix.net#522" + }, + { + "displayTitle": "Article 525 Carnivals, Circuses, Fairs, and Similar Events", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_81_I" + }, + { + "body": "This article covers the installation of portable wiring and equipment for carnivals, circuses, fairs, and similar functions, including wiring in or on all structures. [525.1](https://2023.antflix.net#525.1)", + "displayTitle": "525.1 Scope", + "children": [], + "url": "https://2023.antflix.net#525.1" + }, + { + "displayTitle": "525.3 Other Articles", + "children": [ + { + "body": "Wherever the requirements of other articles of this Code and Article 525 differ, the requirements of Article 525 shall apply to the portable wiring and equipment. [525.3_(A)](https://2023.antflix.net#525.3_(A))", + "displayTitle": "(A) Portable Wiring and Equipment", + "children": [], + "url": "https://2023.antflix.net#525.3_(A)" + }, + { + "body": "This equipment shall be installed to comply with the applicable requirements of Parts I, II, III, and V of Article 680. [525.3_(B)](https://2023.antflix.net#525.3_(B))", + "displayTitle": "(B) Attractions Utilizing Pools, Fountains, and Similar Installations With Contained Volumes of Water", + "children": [], + "url": "https://2023.antflix.net#525.3_(B)" + } + ], + "url": "https://2023.antflix.net#525.3" + }, + { + "displayTitle": "525.5 Overhead Conductor Clearances", + "children": [ + { + "body": "Conductors shall have a vertical clearance to ground in accordance with 225.18. These clearances shall apply only to wiring installed outside of tents and concessions. [525.5_(A)](https://2023.antflix.net#525.5_(A))", + "displayTitle": "(A) Vertical Clearances", + "children": [], + "url": "https://2023.antflix.net#525.5_(A)" + }, + { + "displayTitle": "(B) Clearance to Portable Structures", + "children": [ + { + "body": "Portable structures shall be maintained not less than 4.5 m (15 ft) in any direction from overhead conductors operating at 600 volts or less, except for the conductors supplying the portable structure. Portable structures included in 525.3(B) shall comply with Table 680.9(A). [525.5_(B)_(1)](https://2023.antflix.net#525.5_(B)_(1))", + "displayTitle": "(1) 600 Volts (or Less)", + "children": [], + "url": "https://2023.antflix.net#525.5_(B)_(1)" + }, + { + "body": "Portable structures shall not be located under or within a space that is located 4.5 m (15 ft) horizontally and extending vertically to grade of conductors operating in excess of 600 volts. [525.5_(B)_(2)](https://2023.antflix.net#525.5_(B)_(2))", + "displayTitle": "(2) Over 600 Volts", + "children": [], + "url": "https://2023.antflix.net#525.5_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#525.5_(B)" + } + ], + "url": "https://2023.antflix.net#525.5" + }, + { + "body": "Electrical equipment and wiring methods in or on portable structures shall be provided with mechanical protection where such equipment or wiring methods are subject to physical damage. [525.6](https://2023.antflix.net#525.6)", + "displayTitle": "525.6 Protection of Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#525.6" + }, + { + "displayTitle": "Part II Power Sources", + "children": [], + "url": "https://2023.antflix.net#divider_81_II" + }, + { + "body": "Services shall comply with 525.10(A) and (B). [525.10](https://2023.antflix.net#525.10)", + "displayTitle": "525.10 Services", + "children": [ + { + "body": "Service equipment shall not be installed in a location that is accessible to unqualified persons, unless the equipment is lockable. [525.10_(A)](https://2023.antflix.net#525.10_(A))", + "displayTitle": "(A) Guarding", + "children": [], + "url": "https://2023.antflix.net#525.10_(A)" + }, + { + "body": "Service equipment shall be securely fastened to a solid backing and be installed so as to be protected from the weather, unless of weatherproof construction. [525.10_(B)](https://2023.antflix.net#525.10_(B))", + "displayTitle": "(B) Mounting and Location", + "children": [], + "url": "https://2023.antflix.net#525.10_(B)" + } + ], + "url": "https://2023.antflix.net#525.10" + }, + { + "body": "Where multiple services or separately derived systems, or both, supply portable structures, the equipment grounding conductors of all the sources of supply that serve such structures separated by less than 3.7 m (12 ft) shall be bonded together at the portable structures. The bonding conductor shall be copper and sized in accordance with Table 250.122 based on the largest overcurrent device supplying the portable structures, but not smaller than 6 AWG. [525.11](https://2023.antflix.net#525.11)", + "displayTitle": "525.11 Multiple Sources of Supply", + "children": [], + "url": "https://2023.antflix.net#525.11" + }, + { + "displayTitle": "Part III Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#divider_72_III" + }, + { + "displayTitle": "525.20 Wiring Methods", + "children": [ + { + "body": "Where flexible cords or cables are used, they shall be listed for extra-hard usage. Where flexible cords or cables are used and are not subject to physical damage, they shall be permitted to be listed for hard usage. Where used outdoors, flexible cords and cables shall also be listed for wet locations and shall be sunlight resistant. Extra-hard usage flexible cords or cables shall be permitted for use as permanent wiring on portable amusement rides and attractions where not subject to physical damage. [525.20_(A)](https://2023.antflix.net#525.20_(A))", + "displayTitle": "(A) Type", + "children": [], + "url": "https://2023.antflix.net#525.20_(A)" + }, + { + "body": "Single-conductor cable shall be permitted only in sizes 2 AWG or larger. [525.20_(B)](https://2023.antflix.net#525.20_(B))", + "displayTitle": "(B) Single-Conductor", + "children": [], + "url": "https://2023.antflix.net#525.20_(B)" + }, + { + "body": "Open conductors shall be prohibited except as part of a listed assembly or festoon lighting installed in accordance with Article 225. [525.20_(C)](https://2023.antflix.net#525.20_(C))", + "displayTitle": "(C) Open Conductors", + "children": [], + "url": "https://2023.antflix.net#525.20_(C)" + }, + { + "body": "Flexible cords or cables shall be continuous without splice or tap between boxes or fittings. [525.20_(D)](https://2023.antflix.net#525.20_(D))", + "displayTitle": "(D) Splices", + "children": [], + "url": "https://2023.antflix.net#525.20_(D)" + }, + { + "body": "Cord connectors shall not be laid on the ground unless listed for wet locations. Connectors and cable connections shall not be placed in audience traffic paths or within areas accessible to the public unless guarded. [525.20_(E)](https://2023.antflix.net#525.20_(E))", + "displayTitle": "(E) Cord Connectors", + "children": [], + "url": "https://2023.antflix.net#525.20_(E)" + }, + { + "body": "Wiring for an amusement ride, attraction, tent, or similar structure shall not be supported by any other ride or structure unless specifically designed for the purpose. [525.20_(F)](https://2023.antflix.net#525.20_(F))", + "displayTitle": "(F) Support", + "children": [], + "url": "https://2023.antflix.net#525.20_(F)" + }, + { + "body": "Flexible cords or cables accessible to the public shall be arranged to minimize the tripping hazard and shall be permitted to be covered with nonconductive matting secured to the walkway surface or protected with another approved cable protection method, provided that the matting or other protection method does not constitute a greater tripping hazard than the uncovered cables. Burying cables shall be permitted. The requirements of 300.5 shall not apply. [525.20_(G)](https://2023.antflix.net#525.20_(G))", + "displayTitle": "(G) Protection", + "children": [], + "url": "https://2023.antflix.net#525.20_(G)" + }, + { + "body": "A box or fitting shall be installed at each connection point, outlet, switchpoint, or junction point. [525.20_(H)](https://2023.antflix.net#525.20_(H))", + "displayTitle": "(H) Boxes and Fittings", + "children": [], + "url": "https://2023.antflix.net#525.20_(H)" + } + ], + "url": "https://2023.antflix.net#525.20" + }, + { + "displayTitle": "525.21 Rides, Tents, and Concessions", + "children": [ + { + "body": "A means to disconnect each portable structure from all ungrounded conductors shall be provided. The disconnecting means shall be located within sight of and within 1.8 m (6 ft) of the operator's station. The disconnecting means shall be readily accessible to the operator, including when the ride is in operation. If accessible to unqualified persons, the disconnecting means shall be lockable. A shunt trip device that opens the fused disconnect or circuit breaker if a switch located in the ride operator's console is closed shall be a permissible method of opening the circuit. [525.21_(A)](https://2023.antflix.net#525.21_(A))", + "displayTitle": "(A) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#525.21_(A)" + }, + { + "body": "Electrical wiring for lighting, where installed inside of tents and concessions, shall be securely installed and, where subject to physical damage, shall be provided with mechanical protection. All lamps for general illumination shall be protected from accidental breakage by a luminaire or lampholder with a guard. [525.21_(B)](https://2023.antflix.net#525.21_(B))", + "displayTitle": "(B) Portable Wiring Inside Tents and Concessions", + "children": [], + "url": "https://2023.antflix.net#525.21_(B)" + } + ], + "url": "https://2023.antflix.net#525.21" + }, + { + "body": "Portable distribution or termination boxes shall comply with 525.22(A) through (D). [525.22](https://2023.antflix.net#525.22)", + "displayTitle": "525.22 Portable Distribution or Termination Boxes", + "children": [ + { + "body": "Boxes shall be designed so that no live parts are exposed except where necessary for examination, adjustment, servicing, or maintenance by qualified persons. If installed outdoors, the box shall be of weatherproof construction and mounted so that the bottom of the enclosure is not less than 150 mm (6 in.) above the ground. [525.22_(A)](https://2023.antflix.net#525.22_(A))", + "displayTitle": "(A) Construction", + "children": [], + "url": "https://2023.antflix.net#525.22_(A)" + }, + { + "body": "Busbars shall have an ampere rating not less than the overcurrent device supplying the feeder supplying the box. Where conductors terminate directly on busbars, busbar connectors shall be provided. [525.22_(B)](https://2023.antflix.net#525.22_(B))", + "displayTitle": "(B) Busbars and Terminals", + "children": [], + "url": "https://2023.antflix.net#525.22_(B)" + }, + { + "body": "Receptacles shall have overcurrent protection installed within the box. The over-current protection shall not exceed the ampere rating of the receptacle, except as permitted in Article 430 for motor loads. [525.22_(C)](https://2023.antflix.net#525.22_(C))", + "displayTitle": "(C) Receptacles and Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#525.22_(C)" + }, + { + "body": "Where single-pole connectors are used, they shall comply with 530.10. [525.22_(D)](https://2023.antflix.net#525.22_(D))", + "displayTitle": "(D) Single-Pole Connectors", + "children": [], + "url": "https://2023.antflix.net#525.22_(D)" + } + ], + "url": "https://2023.antflix.net#525.22" + }, + { + "displayTitle": "525.23 Ground-Fault Circuit-Interrupter (GFCI) Protection", + "children": [ + { + "body": "In addition to the requirements of 210.8(B), GFCI protection for personnel shall be provided for the following: All 125-volt, single-phase, 15- and 20-ampere non-locking-type receptacles used for disassembly and reassembly or readily accessible to the general publicEquipment that is readily accessible to the general public and supplied from a 125-volt, single-phase, 15- or 20-ampere branch circuitThe GFCI shall be permitted to be an integral part of the attachment plug or located in the power-supply cord within 300 mm (12 in.) of the attachment plug. Listed cord sets incorporating GFCI for personnel shall be permitted. [525.23_(A)](https://2023.antflix.net#525.23_(A))", + "displayTitle": "(A) Where GFCI Protection Is Required", + "children": [], + "url": "https://2023.antflix.net#525.23_(A)" + }, + { + "body": "Receptacles that are not accessible from grade level and that only facilitate quick disconnecting and reconnecting of electrical equipment shall not be required to be provided with GFCI protection. These receptacles shall be of the locking type. [525.23_(B)](https://2023.antflix.net#525.23_(B))", + "displayTitle": "(B) Where GFCI Protection Is Not Required", + "children": [], + "url": "https://2023.antflix.net#525.23_(B)" + }, + { + "body": "Egress lighting shall not be protected by a GFCI. [525.23_(C)](https://2023.antflix.net#525.23_(C))", + "displayTitle": "(C) Where GFCI Protection Is Not Permitted", + "children": [], + "url": "https://2023.antflix.net#525.23_(C)" + }, + { + "body": "Where GFCI protection is provided through the use of GFCI receptacles, and the branch circuits supplying receptacles use flexible cord, the GFCI protection shall be listed, labeled, and identified for portable use. [525.23_(D)](https://2023.antflix.net#525.23_(D))", + "displayTitle": "(D) Receptacles Supplied by Portable Cords", + "children": [], + "url": "https://2023.antflix.net#525.23_(D)" + } + ], + "url": "https://2023.antflix.net#525.23" + }, + { + "displayTitle": "Part IV Equipment Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#divider_23_IV" + }, + { + "body": "The following equipment connected to the same source shall be bonded: Metal raceways and metal-sheathed cableMetal enclosures of electrical equipmentMetal frames and metal parts of portable structures, trailers, trucks, or other equipment that contain or support electrical equipmentWhere the metal frames or parts of the equipment in 525.30(1), (2), or (3) are likely to become energized in the event of a fault, the equipment grounding conductor of the supply circuit shall be permitted to serve as the bonding means. [525.30](https://2023.antflix.net#525.30)", + "displayTitle": "525.30 Equipment Bonding", + "children": [], + "url": "https://2023.antflix.net#525.30" + }, + { + "body": "The equipment grounding conductor shall be connected to the system grounded conductor at the service disconnecting means or, in the case of a separately derived system such as a generator, at the generator or first disconnecting means supplied by the generator. [525.31](https://2023.antflix.net#525.31)", + "displayTitle": "525.31 Equipment Grounding", + "children": [], + "url": "https://2023.antflix.net#525.31" + }, + { + "body": "The continuity of the equipment grounding conductors shall be verified each time that portable electrical equipment is connected. [525.32](https://2023.antflix.net#525.32)", + "displayTitle": "525.32 Equipment Grounding Conductor Continuity Assurance", + "children": [], + "url": "https://2023.antflix.net#525.32" + } + ], + "url": "https://2023.antflix.net#525" + }, + { + "displayTitle": "Article 530 Motion Picture and Television Studios and Remote Locations", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_82_I" + }, + { + "body": "The requirements of this article shall apply to motion picture and television studios in facilities and locations staffed by qualified persons, except as provided in 520.1. Such occupancies shall include those using either electronic or film cameras for image capture. Informational Note: See NFPA 40-2019, Standard for the Storage and Handling of Cellulose Nitrate Film, for methods of protecting against cellulose nitrate film hazards. [530.1](https://2023.antflix.net#530.1)", + "displayTitle": "530.1 Scope", + "children": [], + "url": "https://2023.antflix.net#530.1" + }, + { + "displayTitle": "530.3 Restricted Public Access", + "children": [ + { + "body": "The electrical equipment covered in this article shall be used in motion picture or television studios with restricted public access. [530.3_(A)](https://2023.antflix.net#530.3_(A))", + "displayTitle": "(A) Studios", + "children": [], + "url": "https://2023.antflix.net#530.3_(A)" + }, + { + "body": "Where the equipment is deployed on remote locations, restricted public access shall be provided in the form of physical barriers or other access control measures. [530.3_(B)](https://2023.antflix.net#530.3_(B))", + "displayTitle": "(B) Remote Locations", + "children": [], + "url": "https://2023.antflix.net#530.3_(B)" + } + ], + "url": "https://2023.antflix.net#530.3" + }, + { + "body": "Portable electrical equipment, including distribution systems, generators, battery systems, and other power sources, shall be deployed, energized, and, while energized, operated and continuously supervised by trained, qualified, and employer-authorized personnel. [530.4](https://2023.antflix.net#530.4)", + "displayTitle": "530.4 Supervision by Qualified Personnel", + "children": [], + "url": "https://2023.antflix.net#530.4" + }, + { + "body": "Wiring methods for permanent installations shall be in accordance with 530.5(A) or (B). [530.5](https://2023.antflix.net#530.5)", + "displayTitle": "530.5 Wiring Methods", + "children": [ + { + "body": "The permanent wiring shall be permitted to be any of the following: Metal racewaysNonmetallic raceways encased in not less than 50 mm (2 in.) of concreteType MI cable, Type MC cable, or Type AC cable containing an insulated equipment grounding conductor sized in accordance with Table 250.122 [530.5_(A)](https://2023.antflix.net#530.5_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#530.5_(A)" + }, + { + "body": "Permanent wiring methods for communications, signaling, data, fire alarm systems, and systems operating at less than 120 volts, nominal, shall be in accordance with the following: Audio signal processing, amplification, and reproduction equipment - 640.9Communications systems - Parts I and IV of Article 800; Part IV of Article 805: and Part IV of Article 840Class 2 and Class 3 remote control and signaling circuits - Part III of Article 725Class 2 circuits that transmit power, data or both to a powered deviceInformational Note: See ANSI/NEMA C137.3-2017, American National Standard for Lighting Systems - Minimum Requirements for Installation of Energy Efficient Power over Ethernet (PoE) Lighting Systems, for information on installation of cables for PoE lighting systems. See Part III of Article 760 for information on fire alarm circuits. [530.5_(B)](https://2023.antflix.net#530.5_(B))", + "displayTitle": "(B) Communications, Signaling Systems, Data Systems, Fire Alarm Systems, and Systems Less Than 120 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#530.5_(B)" + } + ], + "url": "https://2023.antflix.net#530.5" + }, + { + "body": "Applying the demand factors listed in Table 530.7 to the portion of the maximum possible connected load for studio or stage set lighting for all permanently installed feeders between substations and stages and to all permanently installed feeders between the main stage switchboard and stage distribution centers shall be permitted. Table 530.7 Demand Factors for Stage Set Lighting Portion of Stage Set Lighting Load to Which Demand Factor Applied (volt-amperes) Feeder Demand Factor (percent) First 50,000 or less at 100 From 50,001 to 100,000 at 75 From 100,001 to 200,000 at 60 Remaining over 200,000 at 50 [530.7](https://2023.antflix.net#530.7)", + "displayTitle": "530.7 Sizing of Feeder Conductors for Motion Picture and/or Television Studio Sets", + "children": [], + "url": "https://2023.antflix.net#530.7" + }, + { + "body": "Permanent wiring systems shall include an equipment grounding conductor of a type in accordance with 250.118 installed with the supply conductors and connected to the building or structure disconnecting means and the grounding electrode(s). The grounding electrode(s) shall also be connected to the building or structure disconnecting means. Equipment grounding conductors shall be sized in accordance with 250.122. This shall not apply to pendant and portable stage lighting, stage sound equipment, or other special stage equipment operating at not over 150 volts dc to ground. [530.8](https://2023.antflix.net#530.8)", + "displayTitle": "530.8 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#530.8" + }, + { + "body": "Plugs and receptacles shall be in accordance with 530.9(A), (B) and (C). [530.9](https://2023.antflix.net#530.9)", + "displayTitle": "530.9 Plugs and Receptacles", + "children": [ + { + "body": "Plugs and receptacles, including cord connectors and flanged surface devices, shall be rated in amperes. The voltage rating of the plugs and receptacles shall not be less than the nominal circuit voltage. Plug and receptacle ampere ratings for ac circuits shall not be less than the feeder or branch-circuit overcurrent device ampere rating. Table 210.21(B)(2) shall not apply. [530.9_(A)](https://2023.antflix.net#530.9_(A))", + "displayTitle": "(A) Rating", + "children": [], + "url": "https://2023.antflix.net#530.9_(A)" + }, + { + "body": "Plugs and receptacles shall be constructed so that differently rated devices cannot be connected together. Alternating-current multipole connectors shall be polarized and comply with the requirements of 406.7 and 406.10. Exception: 125-volt, 20-ampere, nonlocking (T-slot) receptacles shall be permitted to accept a 15-ampere attachment plug of the same voltage rating. [530.9_(B)](https://2023.antflix.net#530.9_(B))", + "displayTitle": "(B) Construction", + "children": [], + "url": "https://2023.antflix.net#530.9_(B)" + }, + { + "body": "Plugs and receptacles used in portable professional motion picture and television equipment shall be permitted to be interchangeable for ac or dc use if they are on the same premises, listed for ac and dc use, and clearly marked to identify the system to which they are connected. [530.9_(C)](https://2023.antflix.net#530.9_(C))", + "displayTitle": "(C) Interchangeability", + "children": [], + "url": "https://2023.antflix.net#530.9_(C)" + } + ], + "url": "https://2023.antflix.net#530.9" + }, + { + "displayTitle": "530.10 Single-Pole Separable Connectors", + "children": [ + { + "body": "Single-pole separable connectors shall comply with the requirements of 406.13. Sections 400.14, 406.7, and 406.8 shall not apply to listed single-pole separable connectors. [530.10_(A)](https://2023.antflix.net#530.10_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#530.10_(A)" + }, + { + "body": "Where paralleled sets of current-carrying single-pole separable connectors are provided as input devices, they shall be prominently labeled with a warning indicating the presence of internal parallel connections. All paralleled input devices other than primary input devices shall be guarded against accidental contact. [530.10_(B)](https://2023.antflix.net#530.10_(B))", + "displayTitle": "(B) Paralleled Input Devices", + "children": [], + "url": "https://2023.antflix.net#530.10_(B)" + }, + { + "body": "Where portable equipment contains a feed-through outlet of the same rating as its supply inlet, the feed-through outlet shall not require overcurrent protection in the equipment. [530.10_(C)](https://2023.antflix.net#530.10_(C))", + "displayTitle": "(C) Supply Feed-Through Outlets", + "children": [], + "url": "https://2023.antflix.net#530.10_(C)" + } + ], + "url": "https://2023.antflix.net#530.10" + }, + { + "body": "A branch circuit of any size supplying one or more receptacles shall be permitted to supply stage set lighting loads. The GFCI requirements of 210.8(B), excluding 210.8(B)(6), shall apply. Branch circuits supplying egress lighting, life-critical stunts, life-critical special effects, or any other condition where a nonorderly shutdown might introduce additional or increased hazards shall not be protected by GFCIs. [530.11](https://2023.antflix.net#530.11)", + "displayTitle": "530.11 Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#530.11" + }, + { + "displayTitle": "530.12 Enclosing and Guarding Live Parts", + "children": [ + { + "body": "Parts of electrical equipment that are live or are likely to become energized shall be enclosed, guarded, or located so persons cannot accidentally come in contact with them or bring conductive material into contact with them. [530.12_(A)](https://2023.antflix.net#530.12_(A))", + "displayTitle": "(A) Live Parts", + "children": [], + "url": "https://2023.antflix.net#530.12_(A)" + }, + { + "body": "All switches shall be of the externally operable type. [530.12_(B)](https://2023.antflix.net#530.12_(B))", + "displayTitle": "(B) Switches", + "children": [], + "url": "https://2023.antflix.net#530.12_(B)" + } + ], + "url": "https://2023.antflix.net#530.12" + }, + { + "displayTitle": "Part II Portable Equipment in Production Areas of Studios and Remote Locations", + "children": [], + "url": "https://2023.antflix.net#divider_82_II" + }, + { + "displayTitle": "530.21 Portable Equipment", + "children": [ + { + "body": "Portable stage and studio electrical equipment shall be listed or approved. Field-assembled extension cords and multiconductor cable assemblies consisting of listed connectors and cable shall be permitted in production areas. [530.21_(A)](https://2023.antflix.net#530.21_(A))", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#530.21_(A)" + }, + { + "body": "Portable stage and studio equipment and portable power distribution equipment not identified for outdoor use shall be permitted for temporary use if the equipment is supervised by qualified personnel while energized and barriered from the general public. Informational Note No. 1: See ANSI/ESTA E1.58, Electrical Safety Standard for Portable Stage and Studio Equipment Used Outdoors, for requirements covering temporary outdoor use of equipment not identified for outdoor use. Informational Note No. 2: See ANSI/ESTA E1.19-2015, Recommended Practice for the use of Class A Ground-Fault Circuit Interrupters (GFCIs) intended for personnel protection in the Entertainment Industry, for guidance on the use of GFCIs in wet locations. [530.21_(B)](https://2023.antflix.net#530.21_(B))", + "displayTitle": "(B) Outdoor Use", + "children": [], + "url": "https://2023.antflix.net#530.21_(B)" + } + ], + "url": "https://2023.antflix.net#530.21" + }, + { + "displayTitle": "530.22 Portable Wiring", + "children": [ + { + "body": "The wiring for stage set lighting and other supply wiring not fixed in place shall use listed hard usage flexible cords and cables. Where subject to physical damage, such wiring shall use listed extra-hard usage flexible cords and cables. Splices and taps in cables shall be permitted if the total connected load does not exceed the maximum ampacity of the cable. [530.22_(A)](https://2023.antflix.net#530.22_(A))", + "displayTitle": "(A) Stage Set Wiring", + "children": [], + "url": "https://2023.antflix.net#530.22_(A)" + }, + { + "body": "The wiring for stage effects and electrical equipment used as stage properties shall be permitted to be wired with single- or multi-conductor listed flexible cords or cables if the conductors are protected from physical damage and secured to the scenery by approved cable ties or insulated staples. Splices or taps shall be permitted where such are made with listed devices and the circuit is protected at not more than 20 amperes. [530.22_(B)](https://2023.antflix.net#530.22_(B))", + "displayTitle": "(B) Stage or Special Effects and Electrical Equipment Used as Stage Properties", + "children": [], + "url": "https://2023.antflix.net#530.22_(B)" + }, + { + "body": "Cords and cables other than extra-hard usage, where supplied as a part of a listed assembly, shall be permitted. [530.22_(C)](https://2023.antflix.net#530.22_(C))", + "displayTitle": "(C) Other Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#530.22_(C)" + }, + { + "body": "Portable feeder cables shall be permitted to temporarily penetrate fire-rated walls, floors, or ceilings where all of the following apply: The opening is of noncombustible material.When in use, the penetration is sealed with a temporary seal of a listed firestop material.When not in use, the opening shall be capped with a material of equivalent fire rating. [530.22_(D)](https://2023.antflix.net#530.22_(D))", + "displayTitle": "(D) Portable Feeder Cable Penetration of Walls, Floors, or Ceilings", + "children": [], + "url": "https://2023.antflix.net#530.22_(D)" + }, + { + "body": "Cables shall be protected by bushings where they pass through enclosures and shall be arranged so that tension on the cable is not transmitted to the connections. Where power conductors pass through metal, the requirements of 300.20 shall apply. [530.22_(E)](https://2023.antflix.net#530.22_(E))", + "displayTitle": "(E) Cable Protection", + "children": [], + "url": "https://2023.antflix.net#530.22_(E)" + }, + { + "body": "Special-purpose multicircuit cable systems shall comply with 520.68(D). [530.22_(F)](https://2023.antflix.net#530.22_(F))", + "displayTitle": "(F) Special-Purpose Multicircuit Cable Systems", + "children": [], + "url": "https://2023.antflix.net#530.22_(F)" + } + ], + "url": "https://2023.antflix.net#530.22" + }, + { + "body": "Overcurrent protective devices in production areas shall comply with 530.23(A) through (D). [530.23](https://2023.antflix.net#530.23)", + "displayTitle": "530.23 Overcurrent Protection", + "children": [ + { + "body": "Overcurrent protection for portable stage cables shall comply with the requirements of 240.5. [530.23_(A)](https://2023.antflix.net#530.23_(A))", + "displayTitle": "(A) Portable Stage Cables", + "children": [], + "url": "https://2023.antflix.net#530.23_(A)" + }, + { + "body": "Portable feeder cables in production areas shall be protected by means of overcurrent devices set at not more than 400 percent of the ampacity of the cable listed in Table 400.5(A)(2). The maximum load on a single conductor portable feeder cable shall not exceed the cable ampacity in Table 400.5(A)(2). [530.23_(B)](https://2023.antflix.net#530.23_(B))", + "displayTitle": "(B) Portable Single Conductor Feeder Cables Using Single-Pole Separable Connectors", + "children": [], + "url": "https://2023.antflix.net#530.23_(B)" + }, + { + "body": "Cables and cords supplied through plugging boxes shall include only copper conductors. Cables and cords smaller than 8 AWG shall be attached to a plugging box by means of a plug containing two cartridge fuses or a 2-pole circuit breaker. Plugging boxes shall not be permitted on ac systems. Receptacles in dc plugging boxes shall be rated at not less than 30 amperes. [530.23_(C)](https://2023.antflix.net#530.23_(C))", + "displayTitle": "(C) DC Plugging Boxes", + "children": [], + "url": "https://2023.antflix.net#530.23_(C)" + }, + { + "body": "Alternating-current power distribution boxes used in production areas shall contain receptacles of a polarized, grounding type. A feed-through outlet of the same rating as its supply inlet shall not require overcurrent protection in the equipment. Alternating-current power distribution boxes shall be listed. Informational Note: See ANSI/UL 1640-2016, Standard for Portable Power-Distribution Equipment, for information on alternating-current power distribution boxes. [530.23_(D)](https://2023.antflix.net#530.23_(D))", + "displayTitle": "(D) Alternating-Current Power Distribution Boxes", + "children": [], + "url": "https://2023.antflix.net#530.23_(D)" + } + ], + "url": "https://2023.antflix.net#530.23" + }, + { + "body": "Purpose-built luminaires, lighting, and effects equipment shall not be required to be listed but shall be required to be approved. [530.24](https://2023.antflix.net#530.24)", + "displayTitle": "530.24 Purpose-Built Luminaires, Lighting, and Effects Equipment", + "children": [], + "url": "https://2023.antflix.net#530.24" + }, + { + "displayTitle": "530.26 Portable Luminaires", + "children": [ + { + "body": "Portable luminaires shall be listed. Exception: Portable luminaires used as properties on a motion picture set or television stage set, on a studio stage or lot, or on location shall not be considered portable luminaires for the purpose of this section. [530.26_(A)](https://2023.antflix.net#530.26_(A))", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#530.26_(A)" + }, + { + "body": "Portable enclosed-arc lamps, and associated ballasts shall be listed. Interconnecting cord sets and interconnecting cords and cables for enclosed-arc luminaires shall be of extra-hard usage type and listed. Informational Note: See ANSI/ESTA E1.16-2007, Entertainment Technology - Configuration Standard for Metal-Halide Power Cables, for information on enclosed-arc luminaire interconnecting cord sets and cables. [530.26_(B)](https://2023.antflix.net#530.26_(B))", + "displayTitle": "(B) Portable Enclosed-Arc Luminaires", + "children": [], + "url": "https://2023.antflix.net#530.26_(B)" + } + ], + "url": "https://2023.antflix.net#530.26" + }, + { + "displayTitle": "Part III Portable Equipment in Support Areas", + "children": [], + "url": "https://2023.antflix.net#divider_73_III" + }, + { + "body": "The electrical equipment used in non-production areas shall be restricted from access by the general public. [530.41](https://2023.antflix.net#530.41)", + "displayTitle": "530.41 Restricted Public Access", + "children": [], + "url": "https://2023.antflix.net#530.41" + }, + { + "body": "Overcurrent protection of conductors for portable cables shall comply with the requirements of 240.5(A). [530.42](https://2023.antflix.net#530.42)", + "displayTitle": "530.42 Overcurrent Protection for Portable Cable", + "children": [], + "url": "https://2023.antflix.net#530.42" + }, + { + "displayTitle": "530.43 Portable Generators", + "children": [ + { + "body": "Portable and vehicle-mounted generators shall be located away from flammable materials, and exhaust shall be vented away from structures and other areas where people might congregate. [530.43_(A)](https://2023.antflix.net#530.43_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#530.43_(A)" + }, + { + "body": "Portable and vehicle-mounted generators shall not be operated in areas without natural or provided ventilation to prevent the buildup of exhaust. [530.43_(B)](https://2023.antflix.net#530.43_(B))", + "displayTitle": "(B) Ventilation", + "children": [], + "url": "https://2023.antflix.net#530.43_(B)" + } + ], + "url": "https://2023.antflix.net#530.43" + }, + { + "displayTitle": "530.44 Ground-Fault Circuit-Interrupter (GFCI) Protection", + "children": [ + { + "body": "In addition to the requirements of 210.8(B), GFCI protection for personnel shall be provided for the following: All 125-volt, single-phase, 15- and 20-ampere receptacles that are readily accessible to unqualified personnel and that are used for other than motion picture and television production equipmentEquipment, other than motion picture and television production equipment, that is readily accessible to unqualified personnel and supplied from a 125-volt, single-phase, 15- or 20-ampere branch circuitListed GFCI protection for personnel that is identified for portable use shall be permitted to be an integral part of the attachment plug or be located in the power-supply cord within 300 mm (12 in.) of the attachment plug. Listed cord sets incorporating GFCI for personnel shall be permitted. [530.44_(A)](https://2023.antflix.net#530.44_(A))", + "displayTitle": "(A) Where GFCI Protection Is Required", + "children": [], + "url": "https://2023.antflix.net#530.44_(A)" + }, + { + "body": "Egress lighting shall not be protected by a GFCI. [530.44_(B)](https://2023.antflix.net#530.44_(B))", + "displayTitle": "(B) Where GFCI Protection Is Not Permitted", + "children": [], + "url": "https://2023.antflix.net#530.44_(B)" + }, + { + "body": "GFCI protection shall be listed, labeled, and identified for portable use where it is provided using GFCI receptacles and the branch circuits supplying receptacles use flexible cord. [530.44_(C)](https://2023.antflix.net#530.44_(C))", + "displayTitle": "(C) Receptacles Supplied by Portable Cords", + "children": [], + "url": "https://2023.antflix.net#530.44_(C)" + } + ], + "url": "https://2023.antflix.net#530.44" + }, + { + "body": "Where the wiring of production vehicles and trailers are supplied by a grounded ac service or by a grounded separately derived ac source, they shall comply with 530.45(A) through (F) of this section. [530.45](https://2023.antflix.net#530.45)", + "displayTitle": "530.45 Production Vehicles and Trailers", + "children": [ + { + "body": "A listed and appropriately rated panelboard or other equipment specifically listed for this purpose shall be used. The grounded conductor termination bar shall be insulated from the enclosure. [530.45_(A)](https://2023.antflix.net#530.45_(A))", + "displayTitle": "(A) Internal Panelboards (Where Used)", + "children": [], + "url": "https://2023.antflix.net#530.45_(A)" + }, + { + "body": "The panelboard shall have an equipment grounding bus with terminals for all equipment grounding conductors or other approved equipment grounding means. [530.45_(B)](https://2023.antflix.net#530.45_(B))", + "displayTitle": "(B) Grounding", + "children": [], + "url": "https://2023.antflix.net#530.45_(B)" + }, + { + "body": "The equipment grounding conductor in the supply cord or feeder shall be connected to the equipment grounding bus or other approved equipment ground means in the panelboard. [530.45_(C)](https://2023.antflix.net#530.45_(C))", + "displayTitle": "(C) Power-Supply Grounding", + "children": [], + "url": "https://2023.antflix.net#530.45_(C)" + }, + { + "body": "The grounded circuit conductor (neutral conductor) shall be insulated from the equipment grounding conductors and from equipment enclosures and other grounded parts. [530.45_(D)](https://2023.antflix.net#530.45_(D))", + "displayTitle": "(D) Insulated Grounded Conductor (Neutral Conductor)", + "children": [], + "url": "https://2023.antflix.net#530.45_(D)" + }, + { + "body": "All exposed non\u2014current-carrying metal parts that are likely to become energized shall be effectively bonded to the grounding terminal or enclosure of the panelboard. A bonding conductor shall be connected between any panelboard and an accessible terminal on the chassis of the portable trailer or vehicle. [530.45_(E)](https://2023.antflix.net#530.45_(E))", + "displayTitle": "(E) Required Bonding", + "children": [], + "url": "https://2023.antflix.net#530.45_(E)" + }, + { + "body": "Production vehicles and trailers with onboard generators shall comply with the requirements of 551.30. [530.45_(F)](https://2023.antflix.net#530.45_(F))", + "displayTitle": "(F) Production Vehicles and Trailers With Onboard Generators", + "children": [], + "url": "https://2023.antflix.net#530.45_(F)" + } + ], + "url": "https://2023.antflix.net#530.45" + }, + { + "body": "Flexible cords and cables accessible to personnel shall be arranged to minimize tripping hazard potential, and shall be permitted to be covered with a nonconductive matting secured to the walkway surface or protected with another approved cable protection method if the matting or other protection method does not constitute a greater tripping hazard than the uncovered cables. [530.46](https://2023.antflix.net#530.46)", + "displayTitle": "530.46 Protection", + "children": [], + "url": "https://2023.antflix.net#530.46" + }, + { + "displayTitle": "Part IV Dressing Rooms", + "children": [], + "url": "https://2023.antflix.net#divider_24_IV" + }, + { + "body": "Fixed wiring in dressing rooms shall be installed in accordance with the wiring methods covered in Chapter 3. [530.61](https://2023.antflix.net#530.61)", + "displayTitle": "530.61 Fixed Wiring in Dressing Rooms", + "children": [], + "url": "https://2023.antflix.net#530.61" + }, + { + "displayTitle": "Part V Portable Substations", + "children": [], + "url": "https://2023.antflix.net#divider_18_V" + }, + { + "body": "Wiring and equipment in portable substations rated 50 to 1000 volts, nominal, shall conform to the requirements of the sections applying to installations in permanently fixed substations. Where limited space is available, when approved, working spaces shall be permitted to be reduced where the following conditions apply: The equipment is arranged so that the qualified operator can work safely.The equipment is guarded so that other persons in the vicinity cannot accidentally come into contact with current-carrying parts or bring conducting objects into contact with them while they are energized. [530.71](https://2023.antflix.net#530.71)", + "displayTitle": "530.71 General", + "children": [], + "url": "https://2023.antflix.net#530.71" + }, + { + "body": "Wiring and equipment of portable substations rated over 1000 volts, nominal, shall comply with the requirements of Part IV of Article 490. [530.72](https://2023.antflix.net#530.72)", + "displayTitle": "530.72 Over 1000 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#530.72" + } + ], + "url": "https://2023.antflix.net#530" + }, + { + "displayTitle": "Article 540 Motion Picture Projection Rooms", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_83_I" + }, + { + "body": "This article applies to motion picture projection rooms, motion picture projectors, and associated equipment of the professional and nonprofessional types using incandescent, carbon arc, xenon, or other light source equipment that develops hazardous gases, dust, or radiation. Informational Note: See NFPA 40-2019, Standard for the Storage and Handling of Cellulose Nitrate Film, for further information. [540.1](https://2023.antflix.net#540.1)", + "displayTitle": "540.1 Scope", + "children": [], + "url": "https://2023.antflix.net#540.1" + }, + { + "displayTitle": "Part II Equipment and Projectors of the Professional Type", + "children": [], + "url": "https://2023.antflix.net#divider_83_II" + }, + { + "body": "Every professional-type projector shall be located within a projection room. Every projection room shall be of permanent construction and approved for the type of building in which it is located. All projection ports, spotlight ports, viewing ports, and similar openings shall be provided with glass or other approved material to completely close the opening. Such rooms shall not be considered hazardous (classified) locations as defined in Article 500. Informational Note: See NFPA 101-2021, Life Safety Code, for further information on protecting openings in projection rooms handling cellulose nitrate motion picture film. [540.10](https://2023.antflix.net#540.10)", + "displayTitle": "540.10 Motion Picture Projection Room Required", + "children": [], + "url": "https://2023.antflix.net#540.10" + }, + { + "displayTitle": "540.11 Location of Associated Electrical Equipment", + "children": [ + { + "body": "Motor-generator sets, transformers, rectifiers, rheostats, and similar equipment for the supply or control of current to projection or spotlight equipment shall, where nitrate film is used, be located in a separate room. Where placed in the projection room, they shall be located or guarded so that arcs or sparks cannot come in contact with film, and the commutator end or ends of motor-generator sets shall comply with one of the conditions in 540.11(A)(1) through (A)(6). [540.11_(A)](https://2023.antflix.net#540.11_(A))", + "displayTitle": "(A) Motor Generator Sets, Transformers, Rectifiers, Rheostats, and Similar Equipment", + "children": [ + { + "body": "Be of the totally enclosed, enclosed fan-cooled, or enclosed pipe-ventilated type. [540.11_(A)_(1)](https://2023.antflix.net#540.11_(A)_(1))", + "displayTitle": "(1) Types", + "children": [], + "url": "https://2023.antflix.net#540.11_(A)_(1)" + }, + { + "body": "Be enclosed in separate rooms or housings built of noncombustible material constructed so as to exclude flyings or lint with approved ventilation from a source of clean air. [540.11_(A)_(2)](https://2023.antflix.net#540.11_(A)_(2))", + "displayTitle": "(2) Separate Rooms or Housings", + "children": [], + "url": "https://2023.antflix.net#540.11_(A)_(2)" + }, + { + "body": "Have the brush or sliding-contact end of motor-generator enclosed by solid metal covers. [540.11_(A)_(3)](https://2023.antflix.net#540.11_(A)_(3))", + "displayTitle": "(3) Solid Metal Covers", + "children": [], + "url": "https://2023.antflix.net#540.11_(A)_(3)" + }, + { + "body": "Have brushes or sliding contacts enclosed in tight metal housings. [540.11_(A)_(4)](https://2023.antflix.net#540.11_(A)_(4))", + "displayTitle": "(4) Tight Metal Housings", + "children": [], + "url": "https://2023.antflix.net#540.11_(A)_(4)" + }, + { + "body": "Have the upper half of the brush or sliding-contact end of the motor-generator enclosed by a wire screen or perforated metal and the lower half enclosed by solid metal covers. [540.11_(A)_(5)](https://2023.antflix.net#540.11_(A)_(5))", + "displayTitle": "(5) Upper and Lower Half Enclosures", + "children": [], + "url": "https://2023.antflix.net#540.11_(A)_(5)" + }, + { + "body": "Have wire screens or perforated metal placed at the commutator of brush ends. No dimension of any opening in the wire screen or perforated metal shall exceed 1.27 mm (0.05 in.), regardless of the shape of the opening and of the material used. [540.11_(A)_(6)](https://2023.antflix.net#540.11_(A)_(6))", + "displayTitle": "(6) Wire Screens or Perforated Metal", + "children": [], + "url": "https://2023.antflix.net#540.11_(A)_(6)" + } + ], + "url": "https://2023.antflix.net#540.11_(A)" + }, + { + "body": "Switches, overcurrent devices, or other equipment not normally required or used for projectors, sound reproduction, flood or other special effect lamps, or other equipment shall not be installed in projection rooms. Exception No. 1: In projection rooms approved for use only with cellulose acetate (safety) film, the installation of appurtenant electrical equipment used in conjunction with the operation of the projection equipment and the control of lights, curtains, and audio equipment, and so forth, shall be permitted. In such projection rooms, a sign reading \"Safety Film Only Permitted in This Room\" shall be posted on the outside of each projection room door and within the projection room itself in a conspicuous location. Exception No. 2: Remote-control switches for the control of auditorium lights or switches for the control of motors operating curtains and masking of the motion picture screen shall be permitted to be installed in projection rooms. [540.11_(B)](https://2023.antflix.net#540.11_(B))", + "displayTitle": "(B) Switches, Overcurrent Devices, or Other Equipment", + "children": [], + "url": "https://2023.antflix.net#540.11_(B)" + }, + { + "body": "Control of emergency systems shall comply with Article 700. [540.11_(C)](https://2023.antflix.net#540.11_(C))", + "displayTitle": "(C) Emergency Systems", + "children": [], + "url": "https://2023.antflix.net#540.11_(C)" + } + ], + "url": "https://2023.antflix.net#540.11" + }, + { + "body": "Each motion picture projector, floodlight, spotlight, or similar equipment shall have clear working space not less than 750 mm (30 in.) wide on each side and at the rear of the equipment. Exception: One such space shall be permitted between adjacent pieces of equipment. [540.12](https://2023.antflix.net#540.12)", + "displayTitle": "540.12 Work Space", + "children": [], + "url": "https://2023.antflix.net#540.12" + }, + { + "body": "Conductors supplying outlets for arc and xenon projectors of the professional type shall not be smaller than 8 AWG and shall have an ampacity not less than the projector current rating. Conductors for incandescent-type projectors shall conform to normal wiring standards as provided in 210.24. [540.13](https://2023.antflix.net#540.13)", + "displayTitle": "540.13 Conductor Size", + "children": [], + "url": "https://2023.antflix.net#540.13" + }, + { + "body": "Insulated conductors having a rated operating temperature of not less than 200\u00b0C (392\u00b0F) shall be used on all lamps or other equipment where the ambient temperature at the conductors as installed will exceed 50\u00b0C (122\u00b0F). [540.14](https://2023.antflix.net#540.14)", + "displayTitle": "540.14 Conductors on Lamps and Hot Equipment", + "children": [], + "url": "https://2023.antflix.net#540.14" + }, + { + "body": "Cords approved for hard usage, as provided in Table 400.4, shall be used on portable equipment. [540.15](https://2023.antflix.net#540.15)", + "displayTitle": "540.15 Flexible Cords", + "children": [], + "url": "https://2023.antflix.net#540.15" + }, + { + "body": "Projectors and enclosures for arc, xenon, and incandescent lamps and rectifiers, transformers, rheostats, and similar equipment shall be listed. [540.20](https://2023.antflix.net#540.20)", + "displayTitle": "540.20 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#540.20" + }, + { + "body": "Projectors and other equipment shall be marked with the manufacturer's name or trademark and with the voltage and current for which they are designed in accordance with 110.21. [540.21](https://2023.antflix.net#540.21)", + "displayTitle": "540.21 Marking", + "children": [], + "url": "https://2023.antflix.net#540.21" + }, + { + "displayTitle": "Part III Nonprofessional Projectors", + "children": [], + "url": "https://2023.antflix.net#divider_74_III" + }, + { + "body": "Projectors of the nonprofessional or miniature type, where employing cellulose acetate (safety) film, shall be permitted to be operated without a projection room. [540.31](https://2023.antflix.net#540.31)", + "displayTitle": "540.31 Motion Picture Projection Room Not Required", + "children": [], + "url": "https://2023.antflix.net#540.31" + }, + { + "body": "Projection equipment shall be listed. [540.32](https://2023.antflix.net#540.32)", + "displayTitle": "540.32 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#540.32" + } + ], + "url": "https://2023.antflix.net#540" + }, + { + "displayTitle": "Article 545 Manufactured Buildings and Relocatable Structures", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_84_I" + }, + { + "body": "This article covers requirements for manufactured buildings, building components, relocatable structures, and the conductors that connect relocatable structures to a supply of electricity. [545.1](https://2023.antflix.net#545.1)", + "displayTitle": "545.1 Scope", + "children": [], + "url": "https://2023.antflix.net#545.1" + }, + { + "displayTitle": "545.4 Wiring Methods", + "children": [ + { + "body": "All raceway and cable wiring methods included in this Code and other wiring systems specifically intended and listed for use in manufactured buildings shall be permitted with listed fittings and with fittings listed and identified for manufactured buildings. [545.4_(A)](https://2023.antflix.net#545.4_(A))", + "displayTitle": "(A) Methods Permitted", + "children": [], + "url": "https://2023.antflix.net#545.4_(A)" + }, + { + "body": "In closed construction, cables shall be permitted to be secured only at cabinets, boxes, or fittings where 10 AWG or smaller conductors are used and protection against physical damage is provided. [545.4_(B)](https://2023.antflix.net#545.4_(B))", + "displayTitle": "(B) Securing Cables", + "children": [], + "url": "https://2023.antflix.net#545.4_(B)" + } + ], + "url": "https://2023.antflix.net#545.4" + }, + { + "body": "Provisions shall be made to route the service-entrance conductors, underground service conductors, service-lateral, feeder, or branch-circuit supply to the service or building disconnecting means conductors. [545.5](https://2023.antflix.net#545.5)", + "displayTitle": "545.5 Supply Conductors", + "children": [], + "url": "https://2023.antflix.net#545.5" + }, + { + "body": "Service-entrance conductors shall be installed after erection at the building site. Exception: The service-entrance conductors shall be permitted to be installed prior to the erection at the building site where the point of attachment is known prior to manufacture. [545.6](https://2023.antflix.net#545.6)", + "displayTitle": "545.6 Installation of Service-Entrance Conductors", + "children": [], + "url": "https://2023.antflix.net#545.6" + }, + { + "body": "Service equipment shall be installed in accordance with 230.70. [545.7](https://2023.antflix.net#545.7)", + "displayTitle": "545.7 Service Equipment", + "children": [], + "url": "https://2023.antflix.net#545.7" + }, + { + "body": "Protection shall be provided for exposed conductors and equipment during processes of manufacturing, packaging, in transit, and erection at the building site. [545.8](https://2023.antflix.net#545.8)", + "displayTitle": "545.8 Protection of Conductors and Equipment", + "children": [], + "url": "https://2023.antflix.net#545.8" + }, + { + "displayTitle": "545.9 Boxes", + "children": [ + { + "body": "Boxes of dimensions other than those required in Table 314.16(A) shall be permitted to be installed where tested, identified, and listed to applicable standards. [545.9_(A)](https://2023.antflix.net#545.9_(A))", + "displayTitle": "(A) Other Dimensions", + "children": [], + "url": "https://2023.antflix.net#545.9_(A)" + }, + { + "body": "Any box not over 1650 cm3 (100 in.3) in size, intended for mounting in closed construction, shall be affixed with anchors or clamps so as to provide a rigid and secure installation. [545.9_(B)](https://2023.antflix.net#545.9_(B))", + "displayTitle": "(B) Not Over 1650 cm3 (100 in.3)", + "children": [], + "url": "https://2023.antflix.net#545.9_(B)" + } + ], + "url": "https://2023.antflix.net#545.9" + }, + { + "body": "A receptacle or switch with integral enclosure and mounting means, where tested, identified, and listed to applicable standards, shall be permitted to be installed. [545.10](https://2023.antflix.net#545.10)", + "displayTitle": "545.10 Receptacle or Switch With Integral Enclosure", + "children": [], + "url": "https://2023.antflix.net#545.10" + }, + { + "body": "Prewired panels and building components shall provide for the bonding, or bonding and grounding, of all exposed metals likely to become energized, in accordance with Article 250, Parts V, VI, and VII. [545.11](https://2023.antflix.net#545.11)", + "displayTitle": "545.11 Bonding and Grounding", + "children": [], + "url": "https://2023.antflix.net#545.11" + }, + { + "body": "Provisions shall be made to route a grounding electrode conductor from the service, feeder, or branch-circuit supply to the point of attachment to the grounding electrode. [545.12](https://2023.antflix.net#545.12)", + "displayTitle": "545.12 Grounding Electrode Conductor", + "children": [], + "url": "https://2023.antflix.net#545.12" + }, + { + "body": "Fittings and connectors that are intended to be concealed at the time of on-site assembly, where tested, identified, and listed to applicable standards, shall be permitted for on-site interconnection of modules or other building components. Such fittings and connectors shall be equal to the wiring method employed in insulation, temperature rise, and fault-current withstand and shall be capable of enduring the vibration and minor relative motions occurring in the components of manufactured buildings. [545.13](https://2023.antflix.net#545.13)", + "displayTitle": "545.13 Component Interconnections", + "children": [], + "url": "https://2023.antflix.net#545.13" + }, + { + "displayTitle": "Part II Relocatable Structures", + "children": [], + "url": "https://2023.antflix.net#divider_84_II" + }, + { + "body": "Relocatable structures shall comply with Part II of this article and the applicable sections of Part I. [545.20](https://2023.antflix.net#545.20)", + "displayTitle": "545.20 Application Provisions", + "children": [], + "url": "https://2023.antflix.net#545.20" + }, + { + "displayTitle": "545.22 Power Supply", + "children": [ + { + "body": "A relocatable structure shall be supplied by a feeder. The feeder shall include insulated color-coded conductors, one of which shall be an equipment grounding conductor. The equipment grounding conductor shall be permitted to be uninsulated if part of a listed cable assembly. Informational Note: See 590.4(B) for temporary installation of feeder conductors. [545.22_(A)](https://2023.antflix.net#545.22_(A))", + "displayTitle": "(A) Feeder", + "children": [], + "url": "https://2023.antflix.net#545.22_(A)" + }, + { + "body": "Where two or more relocatable structures are structurally connected to form a single unit and there is a factory-installed panelboard in each relocatable structure, each panelboard shall be permitted to be supplied by a separate feeder. [545.22_(B)](https://2023.antflix.net#545.22_(B))", + "displayTitle": "(B) Number of Supplies", + "children": [], + "url": "https://2023.antflix.net#545.22_(B)" + }, + { + "body": "The identification requirements in 225.37 shall not apply to relocatable structures structurally connected provided the following conditions are met: The relocatable structures are located on an industrial or commercial establishment where the conditions of maintenance and supervision ensure qualified individuals will service the installation.The individual panelboard enclosures or covers have been marked to indicate to location of their supply disconnecting means. The marking shall be visible without removing the cover and shall be of sufficient durability to withstand the environment involved. [545.22_(C)](https://2023.antflix.net#545.22_(C))", + "displayTitle": "(C) Identification", + "children": [], + "url": "https://2023.antflix.net#545.22_(C)" + }, + { + "displayTitle": "(D) Grounding", + "children": [ + { + "body": "The feeder(s) shall be grounded in accordance with Parts I, II, and III of Article 250. [545.22_(D)_(1)](https://2023.antflix.net#545.22_(D)_(1))", + "displayTitle": "(1) Feeders", + "children": [], + "url": "https://2023.antflix.net#545.22_(D)_(1)" + }, + { + "body": "Where two or more relocatable structures are structurally connected to form a single unit, and a common grounding electrode conductor and tap arrangement as specified in 250.64(D)(1) is utilized, it shall be permitted to use the chassis bonding conductor specified in 545.26 as the tap conductor. [545.22_(D)_(2)](https://2023.antflix.net#545.22_(D)_(2))", + "displayTitle": "(2) Two or More Relocatable Structures", + "children": [], + "url": "https://2023.antflix.net#545.22_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#545.22_(D)" + } + ], + "url": "https://2023.antflix.net#545.22" + }, + { + "displayTitle": "545.24 Disconnecting Means and Branch-Circuit Overcurrent Protection", + "children": [ + { + "body": "A single disconnecting means consisting of a circuit breaker, or a switch and fuses and its accessories, shall be provided in a readily accessible location for each relocatable structure. [545.24_(A)](https://2023.antflix.net#545.24_(A))", + "displayTitle": "(A) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#545.24_(A)" + }, + { + "body": "Branch-circuit distribution equipment shall be installed in each relocatable structure and shall include overcurrent protection for each branch circuit consisting of either circuit breakers or fuses. Panelboards shall be installed in a readily accessible location. [545.24_(B)](https://2023.antflix.net#545.24_(B))", + "displayTitle": "(B) Branch-Circuit Protective Equipment and Panelboards", + "children": [], + "url": "https://2023.antflix.net#545.24_(B)" + } + ], + "url": "https://2023.antflix.net#545.24" + }, + { + "body": "All exposed non\u2014current-carrying metal parts that are likely to become energized shall be effectively bonded to the grounding terminal or enclosure of the panelboard. A bonding conductor shall be connected between the panelboard and an accessible terminal on the chassis. [545.26](https://2023.antflix.net#545.26)", + "displayTitle": "545.26 Bonding of Exposed Non-Current-Carrying Metal Parts", + "children": [], + "url": "https://2023.antflix.net#545.26" + }, + { + "body": "Where two or more relocatable structures are structurally connected to form a single unit, it shall be permissible to install one communication system bonding termination in accordance with 250.94 provided all the following conditions are met: There is a factory-installed panelboard in each relocatable structure.There is a bonding conductor between the grounding terminal in each panelboard and chassis in accordance with 545.26.There is a minimum 6 AWG copper conductor that extends from the communication system bonding termination that is connected to each chassis bonding conductor required by 545.26.The communication bonding termination shall be permitted to be located in the same area as the primary protector or common communications equipment supplying the relocatable structures. [545.27](https://2023.antflix.net#545.27)", + "displayTitle": "545.27 Intersystem Bonding", + "children": [], + "url": "https://2023.antflix.net#545.27" + }, + { + "body": "In addition to the requirements of 210.8(B), all receptacle outlets installed in compartments accessible from outside the relocatable structure shall have GFCI protection for personnel. [545.28](https://2023.antflix.net#545.28)", + "displayTitle": "545.28 Ground-Fault Circuit-Interrupters (GFCI)", + "children": [], + "url": "https://2023.antflix.net#545.28" + } + ], + "url": "https://2023.antflix.net#545" + }, + { + "displayTitle": "Article 547 Agricultural Buildings", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_85_I" + }, + { + "body": "This article applies to the following agricultural buildings or that part of a building or adjacent areas of similar or like nature as specified in 547.1(A) or (B). [547.1](https://2023.antflix.net#547.1)", + "displayTitle": "547.1 Scope", + "children": [ + { + "body": "Agricultural buildings where excessive dust and dust with water may accumulate, including all areas of poultry, livestock, and fish confinement systems, where litter dust or feed dust, including mineral feed particles, may accumulate. [547.1_(A)](https://2023.antflix.net#547.1_(A))", + "displayTitle": "(A) Excessive Dust and Dust With Water", + "children": [], + "url": "https://2023.antflix.net#547.1_(A)" + }, + { + "body": "Agricultural buildings where a corrosive atmosphere exists. Such buildings include areas where the following conditions exist: Poultry and animal excrement may cause corrosive vapors.Corrosive particles may combine with water.The area is damp and wet by reason of periodic washing for cleaning and sanitizing with water and cleansing agents.Similar conditions exist. [547.1_(B)](https://2023.antflix.net#547.1_(B))", + "displayTitle": "(B) Corrosive Atmosphere", + "children": [], + "url": "https://2023.antflix.net#547.1_(B)" + } + ], + "url": "https://2023.antflix.net#547.1" + }, + { + "body": "For buildings and structures not having conditions as specified in 547.1, the electrical installations shall be made in accordance with the applicable articles in this Code. [547.3](https://2023.antflix.net#547.3)", + "displayTitle": "547.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#547.3" + }, + { + "body": "Electrical equipment or devices installed in accordance with this article shall be installed in a manner such that they will function at full rating without developing surface temperatures in excess of the specified normal safe operating range of the equipment or device. Informational Note: See Part III of Article 502 for use of equipment in Class 2 locations. [547.4](https://2023.antflix.net#547.4)", + "displayTitle": "547.4 Surface Temperatures", + "children": [], + "url": "https://2023.antflix.net#547.4" + }, + { + "displayTitle": "Part II Installations", + "children": [], + "url": "https://2023.antflix.net#divider_85_II" + }, + { + "body": "Wiring methods shall be limited to the following: Type UFType NMCType SE cable-copperJacketed Type MC cableRaceways identified for the locations specified in 547.1(A) and (B)The wiring methods of Article 502, Part II, shall be permitted for areas described in 547.1.Informational Note: See 300.7, 352.44, and 355.44 for installation of raceway systems exposed to widely different temperatures. [547.20](https://2023.antflix.net#547.20)", + "displayTitle": "547.20 Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#547.20" + }, + { + "body": "All cables shall be secured within 200 mm (8 in.) of each cabinet, box, or fitting. Nonmetallic boxes, fittings, conduit, and cables shall be permitted to be mounted directly to any building surface covered by this article without maintaining the 6 mm (1/4 in.) airspace in accordance with 300.6(D). [547.21](https://2023.antflix.net#547.21)", + "displayTitle": "547.21 Mounting", + "children": [], + "url": "https://2023.antflix.net#547.21" + }, + { + "body": "Equipment enclosures, boxes, conduit bodies, and fittings installed in areas of buildings where excessive dust could be present shall be designed to minimize the entrance of dust and shall have no openings through which dust could enter the enclosure. [547.22](https://2023.antflix.net#547.22)", + "displayTitle": "547.22 Equipment Enclosures, Boxes, Conduit Bodies, and Fittings", + "children": [], + "url": "https://2023.antflix.net#547.22" + }, + { + "body": "In damp or wet locations, equipment enclosures, boxes, conduit bodies, and fittings shall be placed or equipped so as to prevent moisture from entering or accumulating within the enclosure, box, conduit body, or fitting. In wet locations, including normally dry or damp locations where surfaces are periodically washed or sprayed with water, boxes, conduit bodies, and fittings shall be listed for use in wet locations, and equipment enclosures shall be weatherproof. [547.23](https://2023.antflix.net#547.23)", + "displayTitle": "547.23 Damp or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#547.23" + }, + { + "body": "Where wet dust, excessive moisture, corrosive gases or vapors, or other corrosive conditions could be present, equipment enclosures, boxes, conduit bodies, and fittings shall have corrosion resistance properties suitable for the conditions. Informational Note No. 1: See Table 110.28 for appropriate enclosure type designations. Informational Note No. 2: Aluminum and magnetic ferrous materials can corrode in agricultural environments. [547.24](https://2023.antflix.net#547.24)", + "displayTitle": "547.24 Corrosive Atmosphere", + "children": [], + "url": "https://2023.antflix.net#547.24" + }, + { + "body": "Where necessary to employ flexible connections, one or more of the following shall be permitted: Dusttight flexible connectorsLiquidtight flexible metal conduit (LFMC) with listed fittingsLiquidtight flexible nonmetallic conduit (LFNC) with listed fittingsFlexible cord listed and identified for hard usage and terminated with listed dusttight cord connectors [547.25](https://2023.antflix.net#547.25)", + "displayTitle": "547.25 Flexible Connections", + "children": [], + "url": "https://2023.antflix.net#547.25" + }, + { + "body": "All electrical wiring and equipment subject to physical damage shall be protected. Nonmetallic cables shall not be permitted to be concealed within walls and above ceilings of buildings (i.e., offices, lunchrooms, ancillary areas, etc.) or portions thereof, which are contiguous with or physically adjoined to livestock confinement areas. Informational Note: Rodents and other pests are common around such installations and will damage nonmetallic cable by chewing the cable jacket and conductor insulation concealed within walls and ceilings of livestock containment areas of agricultural buildings. [547.26](https://2023.antflix.net#547.26)", + "displayTitle": "547.26 Physical Protection", + "children": [], + "url": "https://2023.antflix.net#547.26" + }, + { + "body": "Where a separate equipment grounding conductor, not part of a listed cable assembly, is installed underground within a location falling under the scope in 547.1, it shall be insulated. Informational Note: See 250.120(B) for further information on aluminum and copper-clad aluminum conductors. [547.27](https://2023.antflix.net#547.27)", + "displayTitle": "547.27 Separate Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#547.27" + }, + { + "body": "Ground-fault circuit-interrupter (GFCI) protection shall be provided as required in 210.8(B) for areas of agricultural buildings not included in the scope of this article. GFCI protection shall not be required for other than 125-volt, 15- and 20-ampere receptacles installed within the following areas: Areas requiring an equipotential planeOutdoorsDamp or wet locationsDirt confinement areas for livestock [547.28](https://2023.antflix.net#547.28)", + "displayTitle": "547.28 Ground-Fault Circuit-Interrupter Protection", + "children": [], + "url": "https://2023.antflix.net#547.28" + }, + { + "body": "Switches, including pushbuttons, relays, and similar devices, receptacles, circuit breakers, controllers, and fuses, shall be provided with enclosures as specified in 547.22. [547.29](https://2023.antflix.net#547.29)", + "displayTitle": "547.29 Switches, Receptacles, Circuit Breakers, Controllers, and Fuses", + "children": [], + "url": "https://2023.antflix.net#547.29" + }, + { + "body": "Motors and other rotating electrical machinery shall be totally enclosed or designed so as to minimize the entrance of dust, moisture, or corrosive particles. [547.30](https://2023.antflix.net#547.30)", + "displayTitle": "547.30 Motors", + "children": [], + "url": "https://2023.antflix.net#547.30" + }, + { + "body": "Luminaires shall comply with 547.31(A) through (C). [547.31](https://2023.antflix.net#547.31)", + "displayTitle": "547.31 Luminaires", + "children": [ + { + "body": "Luminaires shall be installed to minimize the entrance and accumulation of dust, foreign matter, moisture, and corrosive material. [547.31_(A)](https://2023.antflix.net#547.31_(A))", + "displayTitle": "(A) Minimize the Entrance of Dust", + "children": [], + "url": "https://2023.antflix.net#547.31_(A)" + }, + { + "body": "Luminaires exposed to physical damage shall be protected by a suitable guard. [547.31_(B)](https://2023.antflix.net#547.31_(B))", + "displayTitle": "(B) Exposed to Physical Damage", + "children": [], + "url": "https://2023.antflix.net#547.31_(B)" + }, + { + "body": "Luminaires exposed to water from condensation, building cleansing water, or solution shall be listed for use in wet locations. [547.31_(C)](https://2023.antflix.net#547.31_(C))", + "displayTitle": "(C) Exposed to Water", + "children": [], + "url": "https://2023.antflix.net#547.31_(C)" + } + ], + "url": "https://2023.antflix.net#547.31" + }, + { + "displayTitle": "Part III Distribution", + "children": [], + "url": "https://2023.antflix.net#divider_75_III" + }, + { + "body": "Any agricultural building or structure for livestock located on the same premises shall be supplied from a distribution point. More than one distribution point on the same premises shall be permitted. Any existing agricultural building or structure for other than livestock not under the scope of Article 547 shall be permitted to be supplied in accordance with 250.32(B)(1), Exception No. 1. [547.40](https://2023.antflix.net#547.40)", + "displayTitle": "547.40 Electrical Supply to Building(s) or Structure(s) From a Distribution Point", + "children": [], + "url": "https://2023.antflix.net#547.40" + }, + { + "body": "Overhead service installations shall comply with 547.41(A)(1) through (A)(9), 547.41(B)(1) through (B)(3), or 547.42. [547.41](https://2023.antflix.net#547.41)", + "displayTitle": "547.41 Overhead Service", + "children": [ + { + "body": "Site-isolating devices shall comply with 547.41(A)(1) through (A)(9). [547.41_(A)](https://2023.antflix.net#547.41_(A))", + "displayTitle": "(A) Site-Isolating Device", + "children": [ + { + "body": "A site-isolating device shall be installed at the distribution point where two or more buildings or structures are supplied from the distribution point. [547.41_(A)_(1)](https://2023.antflix.net#547.41_(A)_(1))", + "displayTitle": "(1) Where Required", + "children": [], + "url": "https://2023.antflix.net#547.41_(A)_(1)" + }, + { + "body": "The site-isolating device shall be pole-mounted and be not less than the height above grade required by 230.24 for the conductors it supplies. [547.41_(A)_(2)](https://2023.antflix.net#547.41_(A)_(2))", + "displayTitle": "(2) Location", + "children": [], + "url": "https://2023.antflix.net#547.41_(A)_(2)" + }, + { + "body": "The site-isolating device shall simultaneously disconnect all ungrounded service conductors from the premises wiring. [547.41_(A)_(3)](https://2023.antflix.net#547.41_(A)_(3))", + "displayTitle": "(3) Operation", + "children": [], + "url": "https://2023.antflix.net#547.41_(A)_(3)" + }, + { + "body": "At the site-isolating device, the grounding electrode conductor shall be connected to the system grounded conductor and the enclosure. [547.41_(A)_(4)](https://2023.antflix.net#547.41_(A)_(4))", + "displayTitle": "(4) Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#547.41_(A)_(4)" + }, + { + "body": "The site-isolating device shall be rated for the calculated load as determined by Part V of Article 220. [547.41_(A)_(5)](https://2023.antflix.net#547.41_(A)_(5))", + "displayTitle": "(5) Rating", + "children": [], + "url": "https://2023.antflix.net#547.41_(A)_(5)" + }, + { + "body": "The site-isolating device shall not be required to provide overcurrent protection. [547.41_(A)_(6)](https://2023.antflix.net#547.41_(A)_(6))", + "displayTitle": "(6) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#547.41_(A)_(6)" + }, + { + "body": "The site-isolating device shall be capable of being remotely operated by an operating handle installed at a readily accessible location. The operating handle of the site-isolating device, when in its highest position, shall not be more than 2.0 m (6 ft 7 in.) above grade or a working platform. [547.41_(A)_(7)](https://2023.antflix.net#547.41_(A)_(7))", + "displayTitle": "(7) Accessibility", + "children": [], + "url": "https://2023.antflix.net#547.41_(A)_(7)" + }, + { + "body": "An additional site-isolating device for the premises wiring system shall not be required where a site-isolating device meeting all applicable requirements of this section is provided by the serving utility as part of their service requirements. [547.41_(A)_(8)](https://2023.antflix.net#547.41_(A)_(8))", + "displayTitle": "(8) Series Devices", + "children": [], + "url": "https://2023.antflix.net#547.41_(A)_(8)" + }, + { + "body": "A site-isolating device shall be permanently marked to identify it as a site-isolating device. This marking shall be located on the operating handle or immediately adjacent thereto. [547.41_(A)_(9)](https://2023.antflix.net#547.41_(A)_(9))", + "displayTitle": "(9) Marking", + "children": [], + "url": "https://2023.antflix.net#547.41_(A)_(9)" + } + ], + "url": "https://2023.antflix.net#547.41_(A)" + }, + { + "body": "Where the service disconnecting means and overcurrent protection are located at the building(s) or structure(s), the requirements of 547.41(B)(1) through (B)(3) shall apply. [547.41_(B)](https://2023.antflix.net#547.41_(B))", + "displayTitle": "(B) Service Disconnecting Means and Overcurrent Protection at the Building(s) or Structure(s)", + "children": [ + { + "body": "The supply conductors shall be sized in accordance with Part V of Article 220. [547.41_(B)_(1)](https://2023.antflix.net#547.41_(B)_(1))", + "displayTitle": "(1) Conductor Sizing", + "children": [], + "url": "https://2023.antflix.net#547.41_(B)_(1)" + }, + { + "body": "The supply conductors shall be installed in accordance with Part II of Article 225. [547.41_(B)_(2)](https://2023.antflix.net#547.41_(B)_(2))", + "displayTitle": "(2) Conductor Installation", + "children": [], + "url": "https://2023.antflix.net#547.41_(B)_(2)" + }, + { + "body": "For each building or structure, grounding and bonding of the supply conductors shall be in accordance with 250.32, and the following conditions shall be met: The equipment grounding conductor is not smaller than the largest supply conductor if of the same material or is adjusted in size in accordance with the equivalent size columns of Table 250.122 if of different materials.The equipment grounding conductor is connected to the grounded circuit conductor and the site-isolating device enclosure at the distribution point. [547.41_(B)_(3)](https://2023.antflix.net#547.41_(B)_(3))", + "displayTitle": "(3) Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#547.41_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#547.41_(B)" + } + ], + "url": "https://2023.antflix.net#547.41" + }, + { + "body": "The service disconnecting means and overcurrent protection for each set of feeders or branch circuits shall be located at the distribution point. The service disconnecting means shall be installed in accordance with Part VI of Article 230. The feeders or branch circuits supplied to buildings or structures shall comply with 250.32 and Article 225, Parts I and II. Informational Note: Methods to reduce neutral-to-earth voltages in livestock facilities include supplying buildings or structures with 4-wire single-phase services, sizing 3-wire single-phase service and feeder conductors to limit voltage drop to 2 percent, and connecting loads line-to-line, will provide reasonable efficiency of operation. [547.42](https://2023.antflix.net#547.42)", + "displayTitle": "547.42 Service Disconnecting Means and Overcurrent Protection at the Distribution Point", + "children": [], + "url": "https://2023.antflix.net#547.42" + }, + { + "body": "Where a site is supplied by more than one distribution point, a permanent plaque or directory shall be installed at each of these distribution points denoting the location of each of the other distribution points and the buildings or structures served by each. [547.43](https://2023.antflix.net#547.43)", + "displayTitle": "547.43 Identification", + "children": [], + "url": "https://2023.antflix.net#547.43" + }, + { + "body": "The installation and bonding of equipotential planes shall comply with 547.44(A) and (B). For the purposes of this section, the term livestock shall not include poultry. [547.44](https://2023.antflix.net#547.44)", + "displayTitle": "547.44 Equipotential Planes and Bonding of Equipotential Planes", + "children": [ + { + "body": "Equipotential planes shall be required in the following areas: [547.44_(A)](https://2023.antflix.net#547.44_(A))", + "displayTitle": "(A) Where Required", + "children": [ + { + "body": "Equipotential planes shall be installed in confinement areas with concrete floors where metallic equipment is located that may become energized and is accessible to livestock. [547.44_(A)_(1)](https://2023.antflix.net#547.44_(A)_(1))", + "displayTitle": "(1) Indoors", + "children": [], + "url": "https://2023.antflix.net#547.44_(A)_(1)" + }, + { + "body": "Equipotential planes shall be installed in concrete slabs where metallic equipment is located that may become energized and is accessible to livestock. The equipotential plane shall encompass the area where the livestock stands while accessing metallic equipment that may become energized. [547.44_(A)_(2)](https://2023.antflix.net#547.44_(A)_(2))", + "displayTitle": "(2) Outdoors", + "children": [], + "url": "https://2023.antflix.net#547.44_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#547.44_(A)" + }, + { + "body": "Equipotential planes shall be bonded to the grounding electrode system or an equipment grounding terminal in any panelboard of the electrical grounding system associated with the equipotential plane. The bonding conductor shall be solid copper, insulated, covered or bare, and not smaller than 8 AWG. The means of bonding to wire mesh or conductive elements shall be by pressure connectors or clamps of brass, copper, copper alloy, or other approved means. Slatted floors that are supported by structures that are a part of an equipotential plane shall not require bonding. Informational Note No. 1: See ASEA/ASABE EP473.2-2001 (R2015), Equipotential Planes in Animal Containment Areas, for methods to establish equipotential planes. Informational Note No. 2: See ASEA/ASABE EP342.3-2010 (R2015), Safety for Electrically Heated Livestock Waterers, for methods for safe installation of livestock waterers. Informational Note No. 3: Low grounding electrode system resistances may reduce voltage differences in livestock facilities. [547.44_(B)](https://2023.antflix.net#547.44_(B))", + "displayTitle": "(B) Bonding", + "children": [], + "url": "https://2023.antflix.net#547.44_(B)" + } + ], + "url": "https://2023.antflix.net#547.44" + } + ], + "url": "https://2023.antflix.net#547" + }, + { + "displayTitle": "Article 550 Mobile Homes, Manufactured Homes, and Mobile Home Parks", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_86_I" + }, + { + "body": "This article covers the electrical conductors and equipment installed within or on mobile and manufactured homes, the conductors that connect mobile and manufactured homes to a supply of electricity, and the installation of electrical wiring, luminaires, equipment, and appurtenances related to electrical installations within a mobile home park up to the mobile home service-entrance conductors or, if none, the mobile home service equipment. Informational Note: See NFPA 501-2017, Standard on Manufactured Housing, and Part 3280, Manufactured Home Construction and Safely Standards, of the Federal Department of Housing and Urban Development for additional information on manufactured housing. [550.1](https://2023.antflix.net#550.1)", + "displayTitle": "550.1 Scope", + "children": [], + "url": "https://2023.antflix.net#550.1" + }, + { + "displayTitle": "550.4 General Requirements", + "children": [ + { + "body": "Mobile homes installed in other than mobile home parks shall comply with the provisions of this article. [550.4_(A)](https://2023.antflix.net#550.4_(A))", + "displayTitle": "(A) In Other Than Mobile Home Parks", + "children": [], + "url": "https://2023.antflix.net#550.4_(A)" + }, + { + "body": "This article shall apply to mobile homes intended for connection to a wiring system rated 120/240 volts, nominal, 3-wire ac, with a grounded neutral conductor. [550.4_(B)](https://2023.antflix.net#550.4_(B))", + "displayTitle": "(B) Connection to Wiring System", + "children": [], + "url": "https://2023.antflix.net#550.4_(B)" + }, + { + "body": "All electrical materials, devices, appliances, fittings, and other equipment shall be listed and labeled by a qualified testing agency and shall be connected in an approved manner when installed. [550.4_(C)](https://2023.antflix.net#550.4_(C))", + "displayTitle": "(C) Listed and Labeled", + "children": [], + "url": "https://2023.antflix.net#550.4_(C)" + } + ], + "url": "https://2023.antflix.net#550.4" + }, + { + "displayTitle": "Part II Mobile and Manufactured Homes", + "children": [], + "url": "https://2023.antflix.net#divider_86_II" + }, + { + "displayTitle": "550.10 Power Supply", + "children": [ + { + "body": "The power supply to the mobile home shall be a feeder assembly consisting of not more than one listed 50-ampere mobile home power-supply cord or a permanently installed feeder. Exception No. 1: A mobile home that is factory equipped with gas or oil-fired centered heating equipment and cooking appliances shall be permitted to be provided with a listed mobile home power-supply cord rated 40 amperes. Exception No. 2: A feeder assembly shall not be required for manufactured homes constructed in accordance with 550.32(B). [550.10_(A)](https://2023.antflix.net#550.10_(A))", + "displayTitle": "(A) Feeder", + "children": [], + "url": "https://2023.antflix.net#550.10_(A)" + }, + { + "body": "If the mobile home has a power-supply cord, it shall be permanently attached to the panelboard, or to a junction box permanently connected to the panelboard, with the free end terminating in an attachment plug cap. Cords with adapters and pigtail ends, extension cords, and similar items shall not be attached to, or shipped with, a mobile home. A suitable clamp or the equivalent shall be provided at the panelboard knockout to afford strain relief for the cord to prevent strain from being transmitted to the terminals when the power-supply cord is handled in its intended manner. The cord shall be a listed type with four conductors, one of which shall be identified by a continuous green color or a continuous green color with one or more yellow stripes for use as the equipment grounding conductor. [550.10_(B)](https://2023.antflix.net#550.10_(B))", + "displayTitle": "(B) Power-Supply Cord", + "children": [], + "url": "https://2023.antflix.net#550.10_(B)" + }, + { + "body": "The attachment plug cap shall be a 3-pole, 4-wire, grounding type, rated 50 amperes, 125/250 volts with a configuration as shown in Figure 550.10(C) and intended for use with the 50-ampere, 125/250-volt receptacle configuration shown in Figure 550.10(C). It shall be listed, by itself or as part of a power-supply cord assembly, for the purpose and shall be molded to or installed on the flexible cord so that it is secured tightly to the cord at the point where the cord enters the attachment plug cap. If a right-angle cap is used, the configuration shall be oriented so that the grounding member is farthest from the cord. Informational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figure 14-50, for complete details of the 50-ampere plug and receptacle configuration. [550.10_(C)](https://2023.antflix.net#550.10_(C))", + "displayTitle": "(C) Attachment Plug Cap", + "children": [], + "url": "https://2023.antflix.net#550.10_(C)" + }, + { + "body": "The overall length of a power-supply cord, measured from the end of the cord, including bared leads, to the face of the attachment plug cap shall not be less than 6.4 m (21 ft) and shall not exceed 11 m (361/2 ft). The length of the cord from the face of the attachment plug cap to the point where the cord enters the mobile home shall not be less than 6.0 m (20 ft). [550.10_(D)](https://2023.antflix.net#550.10_(D))", + "displayTitle": "(D) Overall Length of a Power-Supply Cord", + "children": [], + "url": "https://2023.antflix.net#550.10_(D)" + }, + { + "body": "The power-supply cord shall bear the following marking: FOR USE WITH MOBILE HOMES - 40 AMPERES or FOR USE WITH MOBILE HOMES - 50 AMPERES [550.10_(E)](https://2023.antflix.net#550.10_(E))", + "displayTitle": "(E) Marking", + "children": [], + "url": "https://2023.antflix.net#550.10_(E)" + }, + { + "body": "The point of entrance of the feeder assembly to the mobile home shall be in the exterior wall, floor, or roof. [550.10_(F)](https://2023.antflix.net#550.10_(F))", + "displayTitle": "(F) Point of Entrance", + "children": [], + "url": "https://2023.antflix.net#550.10_(F)" + }, + { + "body": "Where the cord passes through walls or floors, it shall be protected by means of conduits and bushings or equivalent. The cord shall be permitted to be installed within the mobile home walls, provided a continuous raceway having a maximum size of 32 mm (11/4 in.) is installed from the branch-circuit panelboard to the underside of the mobile home floor. [550.10_(G)](https://2023.antflix.net#550.10_(G))", + "displayTitle": "(G) Protected", + "children": [], + "url": "https://2023.antflix.net#550.10_(G)" + }, + { + "body": "Permanent provisions shall be made for the protection of the attachment plug cap of the power-supply cord and any connector cord assembly or receptacle against corrosion and mechanical damage if such devices are in an exterior location while the mobile home is in transit. [550.10_(H)](https://2023.antflix.net#550.10_(H))", + "displayTitle": "(H) Protection Against Corrosion and Mechanical Damage", + "children": [], + "url": "https://2023.antflix.net#550.10_(H)" + }, + { + "body": "Where the calculated load exceeds 50 amperes or where a permanent feeder is used, the supply shall be by means of either of the following: One mast weatherhead installation, installed in accordance with Part II of Article 230, containing four continuous, insulated, color-coded feeder conductors, one of which shall be an equipment grounding conductorA rigid metal conduit, intermediate metal conduit, rigid polyvinyl chloride conduit, or other raceways identified for the location, from the disconnecting means in the mobile home to the underside of the mobile home, with provisions for the attachment to a suitable junction box or fitting to the raceway on the underside of the mobile home [with or without conductors as in 550.10(I)(1)]. The manufacturer shall provide written installation instructions stating the proper feeder conductor sizes for the raceway and the size of the junction box to be used.FIGURE 550.10(C) 50-Ampere, 125/250-Volt Receptacle and Attachment Plug Cap Configurations, 3-Pole, 4-Wire, Grounding-Types, Used for Mobile Home Supply Cords and Mobile Home Parks. [550.10_(I)](https://2023.antflix.net#550.10_(I))", + "displayTitle": "(I) Mast Weatherhead or Raceway", + "children": [], + "url": "https://2023.antflix.net#550.10_(I)" + } + ], + "url": "https://2023.antflix.net#550.10" + }, + { + "body": "The branch-circuit equipment shall be permitted to be combined with the disconnecting means as a single assembly. Such a combination shall be permitted to be designated as a panelboard. If a fused panelboard is used, the maximum fuse size for the mains shall be plainly marked with lettering at least 6 mm (1/4 in.) high and visible when fuses are changed. Where plug fuses and fuseholders are used, they shall be tamper-resistant Type S, enclosed in dead-front fuse panelboards. Electrical panelboards containing circuit breakers shall also be dead-front type. Informational Note: See 110.22 concerning identification of each disconnecting means and each service, feeder, or branch circuit at the point where it originated and the type marking needed. [550.11](https://2023.antflix.net#550.11)", + "displayTitle": "550.11 Disconnecting Means and Branch-Circuit Protective Equipment", + "children": [ + { + "body": "A single disconnecting means shall be provided in each mobile home consisting of a circuit breaker, or a switch and fuses and its accessories installed in a readily accessible location near the point of entrance of the supply cord or conductors into the mobile home. The main circuit breakers or fuses shall be plainly marked \"Main.\" This equipment shall contain a solderless type of grounding connector or bar for the purposes of grounding, with sufficient terminals for all grounding conductors. The terminations of the grounded circuit conductors shall be insulated in accordance with 550.16(A). The disconnecting equipment shall have a rating not less than the calculated load. The distribution equipment, either circuit breaker or fused type, shall be located a minimum of 600 mm (24 in.) from the bottom of such equipment to the floor level of the mobile home. Informational Note: See 550.20(B) for information on disconnecting means for branch circuits designed to energize heating or air-conditioning equipment, or both, located outside the mobile home, other than room air conditioners. A panelboard shall be rated not less than 50 amperes and employ a 2-pole circuit breaker rated 40 amperes for a 40-ampere supply cord, or 50 amperes for a 50-ampere supply cord. A panelboard employing a disconnect switch and fuses shall be rated 60 amperes and shall employ a single 2-pole, 60-ampere fuseholder with 40- or 50-ampere main fuses for 40- or 50-ampere supply cords, respectively. The outside of the panelboard shall be plainly marked with the fuse size. The panelboard shall be located in an accessible location but shall not be located in a bathroom or a clothes closet. A clear working space at least 750 mm (30 in.) wide and 750 mm (30 in.) in front of the panelboard shall be provided. This space shall extend from the floor to the top of the panelboard. [550.11_(A)](https://2023.antflix.net#550.11_(A))", + "displayTitle": "(A) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#550.11_(A)" + }, + { + "body": "Branch-circuit distribution equipment shall be installed in each mobile home and shall include overcurrent protection for each branch circuit consisting of either circuit breakers or fuses. The branch-circuit overcurrent devices shall be rated as follows:Not more than the circuit conductors; andNot more than 150 percent of the rating of a single appliance rated 13.3 amperes or more that is supplied by an individual branch circuit; butNot more than the overcurrent protection size and of the type marked on the air conditioner or other motor-operated appliance. [550.11_(B)](https://2023.antflix.net#550.11_(B))", + "displayTitle": "(B) Branch-Circuit Protective Equipment", + "children": [], + "url": "https://2023.antflix.net#550.11_(B)" + }, + { + "body": "Where circuit breakers are provided for branch-circuit protection, 240-volt circuits shall be protected by a 2-pole common or companion trip, or by circuit breakers with identified handle ties. [550.11_(C)](https://2023.antflix.net#550.11_(C))", + "displayTitle": "(C) Two-Pole Circuit Breakers", + "children": [], + "url": "https://2023.antflix.net#550.11_(C)" + }, + { + "body": "A metal nameplate on the outside adjacent to the feeder assembly entrance shall read as follows: THIS CONNECTION FOR 120/240-VOLT,3-POLE, 4-WIRE, 60-HERTZ,___________ AMPERE SUPPLY The correct ampere rating shall be marked in the blank space. Exception: For manufactured homes, the manufacturer shall provide in its written installation instructions or in the data plate the minimum ampere rating of the feeder assembly or, where provided, the service-entrance conductors intended for connection to the manufactured home. The rating provided shall not be less than the minimum load calculated in accordance with 550.18. [550.11_(D)](https://2023.antflix.net#550.11_(D))", + "displayTitle": "(D) Electrical Nameplates", + "children": [], + "url": "https://2023.antflix.net#550.11_(D)" + } + ], + "url": "https://2023.antflix.net#550.11" + }, + { + "body": "The number of branch circuits required shall be determined in accordance with 550.12(A) through (E). [550.12](https://2023.antflix.net#550.12)", + "displayTitle": "550.12 Branch Circuits", + "children": [ + { + "body": "The number of branch circuits shall be based on 33 volt-amperes/m2 (3 VA/ft2) times outside dimensions of the mobile home (coupler excluded) divided by 120 volts to determine the number of 15- or 20-ampere lighting area circuits, for example, [550.12(A)] [550.12_(A)](https://2023.antflix.net#550.12_(A))", + "displayTitle": "(A) Lighting", + "children": [], + "url": "https://2023.antflix.net#550.12_(A)" + }, + { + "body": "In kitchens, pantries, dining rooms, and breakfast rooms, two or more 20-ampere small-appliance circuits, in addition to the number of circuits required elsewhere in this section, shall be provided for all receptacle outlets required by 550.13(D) in these rooms. Such circuits shall have no other outlets. Exception No. 1: Receptacle outlets installed solely for the electrical supply and support of an electric clock in any the rooms specified in 550.12(B) shall be permitted. Exception No. 2: Receptacle outlets installed to provide power for supplemental equipment and lighting on gas-fired ranges, ovens, or counter-mounted cooking units shall be permitted. Exception No. 3: A single receptacle for refrigeration equipment shall be permitted to be supplied from an individual branch circuit rated 15 amperes or greater. Countertop receptacle outlets installed in the kitchen shall be supplied by not less than two small-appliance circuit branch circuits, either or both of which shall be permitted to supply receptacle outlets in the kitchen and other locations specified in 550.12(B). [550.12_(B)](https://2023.antflix.net#550.12_(B))", + "displayTitle": "(B) Small Appliances", + "children": [], + "url": "https://2023.antflix.net#550.12_(B)" + }, + { + "body": "Where a laundry area is provided, a 20-ampere branch circuit shall be provided to supply the laundry receptacle outlet(s). This circuit shall have no other outlets. [550.12_(C)](https://2023.antflix.net#550.12_(C))", + "displayTitle": "(C) Laundry Area", + "children": [], + "url": "https://2023.antflix.net#550.12_(C)" + }, + { + "body": "(Including furnace, water heater, range, and central or room air conditioner, etc.). There shall be one or more circuits of adequate rating in accordance with the following: Informational Note: See Article 440 for central air conditioning.The ampere rating of fixed appliances shall be not over 50 percent of the circuit rating if lighting outlets (receptacles, other than kitchen, dining area, and laundry, considered as lighting outlets) are on the same circuit.For fixed appliances on a circuit without lighting outlets, the sum of rated amperes shall not exceed the branch-circuit rating. Motor loads or continuous loads shall not exceed 80 percent of the branch-circuit rating.The rating of a single cord-and-plug-connected appliance on a circuit having no other outlets shall not exceed 80 percent of the circuit rating.The rating of a range branch circuit shall be based on the range demand as specified for ranges in 550.18(B)(5). [550.12_(D)](https://2023.antflix.net#550.12_(D))", + "displayTitle": "(D) General Appliances", + "children": [], + "url": "https://2023.antflix.net#550.12_(D)" + }, + { + "body": "Bathroom receptacle outlets shall be supplied by at least one 20-ampere branch circuit. Such circuits shall have no outlets other than as provided for in 550.13(E)(2). [550.12_(E)](https://2023.antflix.net#550.12_(E))", + "displayTitle": "(E) Bathrooms", + "children": [], + "url": "https://2023.antflix.net#550.12_(E)" + } + ], + "url": "https://2023.antflix.net#550.12" + }, + { + "displayTitle": "550.13 Receptacle Outlets", + "children": [ + { + "body": "All receptacle outlets shall comply with the following: Be of grounding typeBe installed according to 406.4Except where supplying specific appliances, be 15- or 20-ampere, 125-volt, either single or multiple type, and accept parallel-blade attachment plugs [550.13_(A)](https://2023.antflix.net#550.13_(A))", + "displayTitle": "(A) Grounding-Type Receptacle Outlets", + "children": [], + "url": "https://2023.antflix.net#550.13_(A)" + }, + { + "body": "Ground-fault circuit-interrupter protection shall be provided as required in 210.8(A). In addition, in the following areas within a mobile or manufactured home, GFCI protection is limited to 125-volt, 15- and 20-ampere receptacles or outlets: Compartments accessible from outside the unitBathrooms, including receptacles in luminairesKitchens, where receptacles are installed to serve countertop surfacesSinks, where receptacles are installed within 1.8 m (6 ft) from the top inside edge of the sinkDishwashersInformational Note: See 422.5(A) for information on protection of dishwashers. [550.13_(B)](https://2023.antflix.net#550.13_(B))", + "displayTitle": "(B) Ground-Fault Circuit Interrupters (GFCI)", + "children": [], + "url": "https://2023.antflix.net#550.13_(B)" + }, + { + "body": "A grounding-type receptacle outlet shall be provided for each cord-connected fixed appliance installed. [550.13_(C)](https://2023.antflix.net#550.13_(C))", + "displayTitle": "(C) Cord-Connected Fixed Appliance", + "children": [], + "url": "https://2023.antflix.net#550.13_(C)" + }, + { + "body": "Except in the bath, closet, and hallway areas, receptacle outlets shall be installed at wall spaces 600 mm (2 ft) wide or more so that no point along the floor line is more than 1.8 m (6 ft) measured horizontally from an outlet in that space. In addition, a receptacle outlet shall be installed in the following locations: Over or adjacent to countertops in the kitchen [at least one on each side of the sink if countertops are on each side and are 300 mm (12 in.) or over in width].Adjacent to the refrigerator and freestanding gas-range space. A multiple-type receptacle shall be permitted to serve as the outlet for a countertop and a refrigerator.At countertop spaces for built-in vanities.At countertop spaces under wall-mounted cabinets.In the wall at the nearest point to where a bar-type counter attaches to the wall.In the wall at the nearest point to where a fixed room divider attaches to the wall.In laundry areas within 1.8 m (6 ft) of the intended location of the laundry appliance(s).At least one receptacle outlet located outdoors and accessible at grade level and not more than 2.0 m (61/2 ft) above grade. A receptacle outlet located in a compartment accessible from the outside of the unit shall be considered an outdoor receptacle.At least one receptacle outlet shall be installed in bathrooms within 900 mm (36 in.) of the outside edge of each basin. The receptacle outlet shall be located above or adjacent to the basin location. This receptacle shall be in addition to any receptacle that is a part of a luminaire or appliance. The receptacle shall not be enclosed within a bathroom cabinet or vanity. [550.13_(D)](https://2023.antflix.net#550.13_(D))", + "displayTitle": "(D) Receptacle Outlets Required", + "children": [], + "url": "https://2023.antflix.net#550.13_(D)" + }, + { + "body": "For the connection of pipe heating cable(s), a receptacle outlet shall be located on the underside of the unit as follows: Within 600 mm (2 ft) of the cold water inlet.Connected to an interior branch circuit, other than a small-appliance branch circuit. It shall be permitted to use a bathroom receptacle circuit for this purpose.On a circuit where all of the outlets are on the load side of the ground-fault circuit interrupter.This outlet shall not be considered as the receptacle required by 550.13(D)(8). [550.13_(E)](https://2023.antflix.net#550.13_(E))", + "displayTitle": "(E) Pipe Heating Cable(s) Outlet", + "children": [], + "url": "https://2023.antflix.net#550.13_(E)" + }, + { + "body": "Receptacle outlets shall not be permitted in the following locations: Receptacle outlets shall not be installed within or directly over a bathtub or shower space.A receptacle shall not be installed in a face-up position in any countertop.Receptacle outlets shall not be installed above electric baseboard heaters, unless provided for in the listing or manufacturer's instructions. [550.13_(F)](https://2023.antflix.net#550.13_(F))", + "displayTitle": "(F) Receptacle Outlets Not Permitted", + "children": [], + "url": "https://2023.antflix.net#550.13_(F)" + }, + { + "body": "Receptacle outlets shall not be required in the following locations: In the wall space occupied by built-in kitchen or wardrobe cabinetsIn the wall space behind doors that can be opened fully against a wall surfaceIn room dividers of the lattice type that are less than 2.5 m (8 ft) long, not solid, and within 150 mm (6 in.) of the floorIn the wall space afforded by bar-type counters [550.13_(G)](https://2023.antflix.net#550.13_(G))", + "displayTitle": "(G) Receptacle Outlets Not Required", + "children": [], + "url": "https://2023.antflix.net#550.13_(G)" + } + ], + "url": "https://2023.antflix.net#550.13" + }, + { + "displayTitle": "550.14 Luminaires and Appliances", + "children": [ + { + "body": "Means shall be provided to securely fasten appliances when the mobile home is in transit. (See 550.16 for provisions on grounding.) [550.14_(A)](https://2023.antflix.net#550.14_(A))", + "displayTitle": "(A) Fasten Appliances in Transit", + "children": [], + "url": "https://2023.antflix.net#550.14_(A)" + }, + { + "body": "Every appliance shall be accessible for inspection, service, repair, or replacement without removal of permanent construction. [550.14_(B)](https://2023.antflix.net#550.14_(B))", + "displayTitle": "(B) Accessibility", + "children": [], + "url": "https://2023.antflix.net#550.14_(B)" + }, + { + "body": "Listed pendant-type luminaires or pendant cords shall be permitted. [550.14_(C)](https://2023.antflix.net#550.14_(C))", + "displayTitle": "(C) Pendants", + "children": [], + "url": "https://2023.antflix.net#550.14_(C)" + }, + { + "body": "Where a luminaire is installed over a bathtub or in a shower stall, it shall be of the enclosed and gasketed type listed for wet locations. [550.14_(D)](https://2023.antflix.net#550.14_(D))", + "displayTitle": "(D) Bathtub and Shower Luminaires", + "children": [], + "url": "https://2023.antflix.net#550.14_(D)" + } + ], + "url": "https://2023.antflix.net#550.14" + }, + { + "body": "Except as specifically limited in this section, the wiring methods and materials included in this Code shall be used in mobile homes. Where conductors are terminated, they shall be used with equipment listed and identified for the conductor materials. [550.15](https://2023.antflix.net#550.15)", + "displayTitle": "550.15 Wiring Methods and Materials", + "children": [ + { + "body": "Nonmetallic boxes shall be permitted only with nonmetallic cable or nonmetallic raceways. [550.15_(A)](https://2023.antflix.net#550.15_(A))", + "displayTitle": "(A) Nonmetallic Boxes", + "children": [], + "url": "https://2023.antflix.net#550.15_(A)" + }, + { + "body": "Nonmetallic cable located 380 mm (15 in.) or less above the floor, if exposed, shall be protected from physical damage by covering boards, guard strips, or raceways. Cable likely to be damaged by stowage shall be so protected in all cases. [550.15_(B)](https://2023.antflix.net#550.15_(B))", + "displayTitle": "(B) Nonmetallic Cable Protection", + "children": [], + "url": "https://2023.antflix.net#550.15_(B)" + }, + { + "body": "Metal-covered and nonmetallic cables shall be permitted to pass through the centers of the wide side of 2 by 4 studs. However, they shall be protected where they pass through 2 by 2 studs or at other studs or frames where the cable or armor would be less than 32 mm (11/4 in.) from the inside or outside surface of the studs where the wall covering materials are in contact with the studs. Steel plates on each side of the cable, or a tube, with not less than 1.35 mm (0.053 in.) wall thickness shall be required to protect the cable. These plates or tubes shall be securely held in place. [550.15_(C)](https://2023.antflix.net#550.15_(C))", + "displayTitle": "(C) Metal-Covered and Nonmetallic Cable Protection", + "children": [], + "url": "https://2023.antflix.net#550.15_(C)" + }, + { + "body": "Where metal faceplates are used, the installation shall comply with 404.9(B) and 406.6(B). [550.15_(D)](https://2023.antflix.net#550.15_(D))", + "displayTitle": "(D) Metal Faceplates", + "children": [], + "url": "https://2023.antflix.net#550.15_(D)" + }, + { + "body": "Where a range, clothes dryer, or other appliance is connected by metal-covered cable or flexible metal conduit, a length of not less than 900 mm (3 ft) of unsupported cable or conduit shall be provided to service the appliance. The cable or flexible metal conduit shall be secured to the wall. Type NM or Type SE cable shall not be used to connect a range or dryer. This shall not prohibit the use of Type NM or Type SE cable between the branch-circuit overcurrent protective device and a junction box or range or dryer receptacle. [550.15_(E)](https://2023.antflix.net#550.15_(E))", + "displayTitle": "(E) Installation Requirements", + "children": [], + "url": "https://2023.antflix.net#550.15_(E)" + }, + { + "body": "Where rigid metal conduit or intermediate metal conduit is terminated at an enclosure with a locknut and bushing connection, two locknuts shall be provided, one inside and one outside of the enclosure. Rigid nonmetallic conduit, electrical nonmetallic tubing, or surface raceway shall be permitted. All cut ends of conduit and tubing shall be reamed or otherwise finished to remove rough edges. [550.15_(F)](https://2023.antflix.net#550.15_(F))", + "displayTitle": "(F) Raceways", + "children": [], + "url": "https://2023.antflix.net#550.15_(F)" + }, + { + "body": "Switches shall be rated as follows: For lighting circuits, switches shall be rated not less than 10 amperes, 120 to 125 volts, and in no case less than the connected load.Switches for motor or other loads shall comply with 404.14. [550.15_(G)](https://2023.antflix.net#550.15_(G))", + "displayTitle": "(G) Switches", + "children": [], + "url": "https://2023.antflix.net#550.15_(G)" + }, + { + "body": "Where outdoor or under-chassis line-voltage (120 volts, nominal, or higher) wiring is exposed, it shall be protected by a conduit or raceway identified for use in wet locations. The conductors shall be listed for use in wet locations.Where wiring is exposed to physical damage, it shall be protected by a raceway, conduit, or other means. [550.15_(H)](https://2023.antflix.net#550.15_(H))", + "displayTitle": "(H) Under-Chassis Wiring (Exposed to Weather)", + "children": [], + "url": "https://2023.antflix.net#550.15_(H)" + }, + { + "body": "Boxes, fittings, and cabinets shall be securely fastened in place and shall be supported from a structural member of the home, either directly or by using a substantial brace. Exception: Snap-in-type boxes. Boxes provided with special wall or ceiling brackets and wiling devices with integral enclosures that securely fasten to walls or ceilings and are identified for the use shall be permitted without support from a structured member or brace. The testing and approval shall include the wall and ceiling construction systems for which the boxes and devices are intended to be used. [550.15_(I)](https://2023.antflix.net#550.15_(I))", + "displayTitle": "(I) Boxes, Fittings, and Cabinets", + "children": [], + "url": "https://2023.antflix.net#550.15_(I)" + }, + { + "body": "Appliances having branch-circuit terminal connections that operate at temperatures higher than 60\u00b0C (140\u00b0F) shall have circuit conductors as described in the following: Branch-circuit conductors having an insulation suitable for the temperature encountered shall be permitted to be run directly to the appliance.Conductors having an insulation suitable for the temperature encountered shall be run from the appliance terminal connection to a readily accessible outlet box placed at least 300 mm (1 ft) from the appliance. These conductors shall be in a suitable raceway or Type AC or MC cable of at least 450 mm (18 in.) but not more than 1.8 m (6 ft) in length. [550.15_(J)](https://2023.antflix.net#550.15_(J))", + "displayTitle": "(J) Appliance Terminal Connections", + "children": [], + "url": "https://2023.antflix.net#550.15_(J)" + }, + { + "body": "Fittings and connectors that are intended to be concealed at the time of assembly shall be listed and identified for the interconnection of building components. Such fittings and connectors shall be equal to the wiring method employed in insulation, temperature rise, and fault-current withstanding and shall be capable of enduring the vibration and shock occurring in mobile home transportation. Informational Note: See 550.19 for interconnection of multiple section units. [550.15_(K)](https://2023.antflix.net#550.15_(K))", + "displayTitle": "(K) Component Interconnections", + "children": [], + "url": "https://2023.antflix.net#550.15_(K)" + } + ], + "url": "https://2023.antflix.net#550.15" + }, + { + "body": "Grounding of both electrical and nonelectrical metal parts in a mobile home shall be through connection to a grounding bus in the mobile home panelboard and shall be connected through the green-colored insulated conductor in the supply cord or the feeder wiring to the grounding bus in the service-entrance equipment located adjacent to the mobile home location. Neither the frame of the mobile home nor the frame of any appliance shall be connected to the grounded circuit conductor in the mobile home. Where the panelboard is the service equipment as permitted by 550.32(B), the neutral conductors and the equipment grounding bus shall be connected. [550.16](https://2023.antflix.net#550.16)", + "displayTitle": "550.16 Grounding", + "children": [ + { + "displayTitle": "(A) Grounded Conductor", + "children": [ + { + "body": "The grounded circuit conductor shall be insulated from the equipment grounding conductors and from equipment enclosures and other grounded parts. The grounded circuit conductor terminals in the panelboard and in ranges, clothes dryers, counter-mounted cooking units, and wall-mounted ovens shall be insulated from the equipment enclosure. Bonding screws, straps, or buses in the panelboard or in appliances shall be removed and discarded. Where the panelboard is the service equipment as permitted by 550.32(B), the neutral conductors and the equipment grounding bus shall be connected. [550.16_(A)_(1)](https://2023.antflix.net#550.16_(A)_(1))", + "displayTitle": "(1) Insulated", + "children": [], + "url": "https://2023.antflix.net#550.16_(A)_(1)" + }, + { + "body": "Connections of ranges and clothes dryers with 120/240-volt, 3-wire ratings shall be made with 4-conductor cord and 3-pole, 4-wire, grounding-type plugs or by Type AC cable, Type MC cable, or conductors enclosed in flexible metal conduit. [550.16_(A)_(2)](https://2023.antflix.net#550.16_(A)_(2))", + "displayTitle": "(2) Connections of Ranges and Clothes Dryers", + "children": [], + "url": "https://2023.antflix.net#550.16_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#550.16_(A)" + }, + { + "displayTitle": "(B) Equipment Grounding Means", + "children": [ + { + "body": "The green-colored insulated grounding wire in the supply cord or permanent feeder wiring shall be connected to the grounding bus in the panelboard or disconnecting means. [550.16_(B)_(1)](https://2023.antflix.net#550.16_(B)_(1))", + "displayTitle": "(1) Supply Cord or Permanent Feeder", + "children": [], + "url": "https://2023.antflix.net#550.16_(B)_(1)" + }, + { + "body": "In the electrical system, all exposed metal parts, enclosures, frames, luminaire canopies, and so forth, shall be effectively bonded to the grounding terminal or enclosure of the panelboard. [550.16_(B)_(2)](https://2023.antflix.net#550.16_(B)_(2))", + "displayTitle": "(2) Electrical System", + "children": [], + "url": "https://2023.antflix.net#550.16_(B)_(2)" + }, + { + "body": "Cord-connected appliances, such as washing machines, clothes dryers, and refrigerators, and the electrical system of gas ranges and so forth, shall be grounded by means of a cord with an equipment grounding conductor and grounding-type attachment plug. [550.16_(B)_(3)](https://2023.antflix.net#550.16_(B)_(3))", + "displayTitle": "(3) Cord-Connected Appliances", + "children": [], + "url": "https://2023.antflix.net#550.16_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#550.16_(B)" + }, + { + "displayTitle": "(C) Bonding of Non-Current-Carrying Metal Parts", + "children": [ + { + "body": "All exposed non\u2014current-carrying metal parts that are likely to become energized shall be effectively bonded to the grounding terminal or enclosure of the panelboard. A bonding conductor shall be connected between the panelboard and an accessible terminal on the chassis. Chassis of multiple mobile home sections shall be bonded together with a solid copper, 8 AWG minimum, insulated or bare, bonding conductor with terminations in accordance with 250.8 and 250.12. [550.16_(C)_(1)](https://2023.antflix.net#550.16_(C)_(1))", + "displayTitle": "(1) Exposed Non-Current-Carrying Metal Parts", + "children": [], + "url": "https://2023.antflix.net#550.16_(C)_(1)" + }, + { + "body": "Grounding terminals shall be of the solderless type and listed as pressure-terminal connectors recognized for the wire size used. The bonding conductor shall be solid or stranded, insulated or bare, and shall be 8 AWG copper minimum, or equivalent. The bonding conductor shall be routed so as not to be exposed to physical damage. [550.16_(C)_(2)](https://2023.antflix.net#550.16_(C)_(2))", + "displayTitle": "(2) Grounding Terminals", + "children": [], + "url": "https://2023.antflix.net#550.16_(C)_(2)" + }, + { + "body": "Metallic gas, water, and waste pipes and metallic air-circulating ducts shall be considered bonded if they are connected to the terminal on the chassis [see 550.16(C)(1)] by clamps, solderless connectors, or by suitable grounding-type straps. [550.16_(C)_(3)](https://2023.antflix.net#550.16_(C)_(3))", + "displayTitle": "(3) Metallic Piping and Ducts", + "children": [], + "url": "https://2023.antflix.net#550.16_(C)_(3)" + }, + { + "body": "Any metallic roof and exterior covering shall be considered bonded if the following conditions are met: The metal panels overlap one another and are securely attached to the wood or metal frame parts by metallic fasteners.The lower panel of the metallic exterior covering is secured by metallic fasteners at a cross member of the chassis by two metal straps per mobile home unit or section at opposite ends.The bonding strap material shall be a minimum of 100 mm (4 in.) in width of material equivalent to the skin or a material of equal or better electrical conductivity. The straps shall be fastened with paint-penetrating fittings such as screws and star-washers or equivalent. [550.16_(C)_(4)](https://2023.antflix.net#550.16_(C)_(4))", + "displayTitle": "(4) Metallic Roof and Exterior Coverings", + "children": [], + "url": "https://2023.antflix.net#550.16_(C)_(4)" + } + ], + "url": "https://2023.antflix.net#550.16_(C)" + } + ], + "url": "https://2023.antflix.net#550.16" + }, + { + "displayTitle": "550.17 Testing", + "children": [ + { + "body": "The wiring of each mobile home shall be subjected to a 1-minute, 900-volt, dielectric strength test (with all switches closed) between live parts (including neutral conductor) and the mobile home ground. Alternatively, the test shall be permitted to be performed at 1080 volts for 1 second. This test shall be performed after branch circuits are complete and after luminaires or appliances are installed. Exception: Listed luminaires or appliances shall not be required to withstand the dielectric strength test. [550.17_(A)](https://2023.antflix.net#550.17_(A))", + "displayTitle": "(A) Dielectric Strength Test", + "children": [], + "url": "https://2023.antflix.net#550.17_(A)" + }, + { + "body": "Each mobile home shall be subjected to all of the following: An electrical continuity test to ensure that all exposed electrically conductive parts are properly bondedAn electrical operational test to demonstrate that all equipment, except water heaters and electric furnaces, is connected and in working orderElectrical polarity checks of permanently wired equipment and receptacle outlets to determine that connections have been properly made [550.17_(B)](https://2023.antflix.net#550.17_(B))", + "displayTitle": "(B) Continuity and Operational Tests and Polarity Checks", + "children": [], + "url": "https://2023.antflix.net#550.17_(B)" + } + ], + "url": "https://2023.antflix.net#550.17" + }, + { + "body": "The following method shall be employed in calculating the supply-cord and distribution-panelboard load for each feeder assembly for each mobile home in lieu of the procedure shown in Article 220 and shall be based on a 3-wire, 120/240-volt supply with 120-volt loads balanced between the two ungrounded conductors of the 3-wire system. [550.18](https://2023.antflix.net#550.18)", + "displayTitle": "550.18 Calculations", + "children": [ + { + "displayTitle": "(A) Lighting, Small-Appliance, and Laundry Load", + "children": [ + { + "body": "Length times width of mobile home floor (outside dimensions) times 33 volt-amperes/m2 (3 VA/ft2)- for example, length \u00d7 width \u00d7 3 = lighting voltamperes. [550.18_(A)_(1)](https://2023.antflix.net#550.18_(A)_(1))", + "displayTitle": "(1) Lighting Volt-Amperes", + "children": [], + "url": "https://2023.antflix.net#550.18_(A)_(1)" + }, + { + "body": "Number of circuits times 1500 volt-amperes for each 20-ampere appliance receptacle circuit - for example, number of circuits \u00d7 1500 = small-appliance volt-amperes. [550.18_(A)_(2)](https://2023.antflix.net#550.18_(A)_(2))", + "displayTitle": "(2) Small-Appliance Volt-Amperes", + "children": [], + "url": "https://2023.antflix.net#550.18_(A)_(2)" + }, + { + "body": "1500 volt-amperes. [550.18_(A)_(3)](https://2023.antflix.net#550.18_(A)_(3))", + "displayTitle": "(3) Laundry Area Circuit Volt-Amperes", + "children": [], + "url": "https://2023.antflix.net#550.18_(A)_(3)" + }, + { + "body": "Lighting volt-amperes plus small-appliance volt-amperes plus laundry area volt-amperes equals total volt-amperes. [550.18_(A)_(4)](https://2023.antflix.net#550.18_(A)_(4))", + "displayTitle": "(4) Total Volt-Amperes", + "children": [], + "url": "https://2023.antflix.net#550.18_(A)_(4)" + }, + { + "body": "First 3000 total volt-amperes at 100 percent plus remainder at 35 percent equals volt-amperes to be divided by 240 volts to obtain current (amperes) per leg. [550.18_(A)_(5)](https://2023.antflix.net#550.18_(A)_(5))", + "displayTitle": "(5) Net Volt-Amperes", + "children": [], + "url": "https://2023.antflix.net#550.18_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#550.18_(A)" + }, + { + "body": "Total load for determining power supply is the sum of the following:\n\nLighting and small-appliance load as calculated in 550.18(A)(5).\nNameplate amperes for motors and heater loads (exhaust fans, air conditioners, electric, gas, or oil heating). Omit smaller of the heating and cooling loads, except include blower motor if used as air-conditioner evaporator motor. Where an air conditioner is not installed and a 40-ampere power-supply cord is provided, allow 15 amperes per leg for air conditioning.\nTwenty-five percent of current of largest motor in 550.18(B)(2).\nTotal of nameplate amperes for waste disposer, dishwasher, water heater, clothes dryer, wall-mounted oven, cooking units. Where the number of these appliances exceeds three, use 75 percent of total.\nDerive amperes for freestanding range (as distinguished from separate ovens and cooking units) by dividing the following values by 240 volts as shown in Table 550.18(B).\nIf outlets or circuits are provided for other than factory-installed appliances, include the anticipated load.\n\nInformational Note: See Informative Annex D, Example D11, for an illustration of the application of this calculation. [550.18_(B)](https://2023.antflix.net#550.18_(B))", + "displayTitle": "(B) Total Load for Determining Power Supply", + "children": [], + "url": "https://2023.antflix.net#550.18_(B)" + }, + { + "body": "The optional method for calculating lighting and appliance load shown in 220.82 shall be permitted. Table 550.18(B) Freestanding Range Load Nameplate Rating(watts) Use(volt-amperes) 0\u201410,000 80 percent of rating Over 10,000\u201412,500 8,000 Over 12,500\u201413,500 8,400 Over 13,500\u201414,500 8,800 Over 14,500\u201415,500 9,200 Over 15,500\u201416,500 9,600 Over 16,500\u201417,500 10,000 [550.18_(C)](https://2023.antflix.net#550.18_(C))", + "displayTitle": "(C) Optional Method of Calculation for Lighting and Appliance Load", + "children": [], + "url": "https://2023.antflix.net#550.18_(C)" + } + ], + "url": "https://2023.antflix.net#550.18" + }, + { + "displayTitle": "550.19 Interconnection of Multiple-Section Mobile or Manufactured Home Units", + "children": [ + { + "body": "Approved and listed fixed-type wiring methods shall be used to join portions of a circuit that must be electrically joined and are located in adjacent sections after the home is installed on its support foundation. The circuit's junction shall be accessible for disassembly when the home is prepared for relocation. Informational Note: See 550.15 (K) for component interconnections. [550.19_(A)](https://2023.antflix.net#550.19_(A))", + "displayTitle": "(A) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#550.19_(A)" + }, + { + "body": "Expandable or multiunit manufactured homes, not having permanently installed feeders, that are to be moved from one location to another shall be permitted to have disconnecting means with branch-circuit protective equipment in each unit when so located that after assembly or joining together of units, the requirements of 550.10 will be met. [550.19_(B)](https://2023.antflix.net#550.19_(B))", + "displayTitle": "(B) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#550.19_(B)" + } + ], + "url": "https://2023.antflix.net#550.19" + }, + { + "displayTitle": "550.20 Outdoor Outlets, Luminaires, Air-Cooling Equipment, and So Forth", + "children": [ + { + "body": "Outdoor luminaires and equipment shall be listed for wet locations or outdoor use. Outdoor receptacles shall comply with 406.9. Where located on the underside of the home or located under roof extensions or similarly protected locations, outdoor luminaires and equipment shall be listed for use in damp locations. [550.20_(A)](https://2023.antflix.net#550.20_(A))", + "displayTitle": "(A) Listed for Outdoor Use", + "children": [], + "url": "https://2023.antflix.net#550.20_(A)" + }, + { + "body": "A mobile home provided with a branch circuit designed to energize outside heating equipment, air-conditioning equipment, or both, located outside the mobile home, other than room air conditioners, shall have such branch-circuit conductors terminate in a listed outlet box, or disconnecting means, located on the outside of the mobile home. A label shall be permanently affixed adjacent to the outlet box and shall contain the following information: THIS CONNECTION IS FOR HEATINGAND/OR AIR-CONDITIONING EQUIPMENT.THE BRANCH CIRCUIT IS RATED AT NOT MORE THAN _______ AMPERES, AT ______ VOLTS, 60 HERTZ,CONDUCTOR AMPACITY.A DISCONNECTING MEANS SHALL BE LOCATEDWITHIN SIGHT OF THE EQUIPMENT. The correct voltage and ampere rating shall be given. The tag shall be not less than 0.51 mm (0.020 in.) thick etched brass, stainless steel, anodized or alclad aluminum, or equivalent. The tag shall not be less than 75 mm by 45 mm (3 in. by 13/4 in.) minimum size. [550.20_(B)](https://2023.antflix.net#550.20_(B))", + "displayTitle": "(B) Outside Heating Equipment, Air-Conditioning Equipment, or Both", + "children": [], + "url": "https://2023.antflix.net#550.20_(B)" + } + ], + "url": "https://2023.antflix.net#550.20" + }, + { + "body": "All 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlets or devices installed in mobile homes and manufactured homes shall comply with 210.12 [550.25](https://2023.antflix.net#550.25)", + "displayTitle": "550.25 Arc-Fault Circuit-Interrupter Protection", + "children": [], + "url": "https://2023.antflix.net#550.25" + }, + { + "displayTitle": "Part III Services and Feeders", + "children": [], + "url": "https://2023.antflix.net#divider_76_III" + }, + { + "body": "The mobile home park secondary electrical distribution system to mobile home lots shall be single-phase, 120/240 volts, nominal. [550.30](https://2023.antflix.net#550.30)", + "displayTitle": "550.30 Distribution System", + "children": [], + "url": "https://2023.antflix.net#550.30" + }, + { + "body": "Park electrical wiring systems shall be calculated (at 120/240 volts) on the larger of the following: 16,000 volt-amperes for each mobile home lotThe load calculated in accordance with 550.18 for the largest typical mobile home that each lot will acceptIt shall be permissible to calculate the feeder or service load in accordance with Table 550.31. No demand factor shall be allowed for any other load, except as provided in this Code.Table 550.31 Demand Factors for Services and Feeders Number of Mobile Homes Demand Factor (%) 1 100 2 55 3 44 4 39 5 33 6 29 7\u20149 28 10\u201412 27 13\u201415 26 16\u201421 25 22\u201440 24 41\u201460 23 61 and over 22 [550.31](https://2023.antflix.net#550.31)", + "displayTitle": "550.31 Allowable Demand Factors", + "children": [], + "url": "https://2023.antflix.net#550.31" + }, + { + "displayTitle": "550.32 Service Equipment", + "children": [ + { + "body": "The mobile home service equipment shall not be mounted in or on the mobile home. The service equipment shall be rated not less than that required in accordance with 550.32(C), mounted in a readily accessible outdoor location, and within sight from the mobile home it serves. The mobile home service disconnect shall be permitted to be used as the emergency disconnect in accordance with 230.85. [550.32_(A)](https://2023.antflix.net#550.32_(A))", + "displayTitle": "(A) Mobile Home Service Equipment", + "children": [], + "url": "https://2023.antflix.net#550.32_(A)" + }, + { + "body": "The manufactured home service equipment shall be permitted to be installed in or on a manufactured home, provided that all of the following conditions are met: The manufacturer shall include in its written installation instructions information indicating that the home shall be secured in place by an anchoring system or installed on and secured to a permanent foundation.The installation of the service shall comply with Part I through Part VII of Article 230.Means shall be provided for the connection of a grounding electrode conductor to the service equipment and routing it outside the structure.Bonding and grounding of the service shall be in accordance with Part I through Part V of Article 250.The manufacturer shall include in its written installation instructions one method of grounding the service equipment at the installation site. The instructions shall clearly state that other methods of grounding are found in Article 250.The minimum size grounding electrode conductor shall be specified in the instructions.A warning label shall be mounted on or adjacent to the service equipment. The label shall meet the requirements in 110.21(B) and shall state the following:WARNINGDO NOT PROVIDE ELECTRICAL POWER UNTIL THE GROUNDING ELECTRODE(S)IS INSTALLED AND CONNECTED (SEE INSTALLATION INSTRUCTIONS).Where the service equipment is not installed in or on the unit, the installation shall comply with the other requirements of this section. [550.32_(B)](https://2023.antflix.net#550.32_(B))", + "displayTitle": "(B) Manufactured Home Service Equipment", + "children": [], + "url": "https://2023.antflix.net#550.32_(B)" + }, + { + "body": "Mobile home service equipment shall be rated at not less than 100 amperes at 120/240 volts, and provisions shall be made for connecting a mobile home feeder assembly by a permanent wiring method. Power outlets used as mobile home service equipment shall also be permitted to contain receptacles rated up to 50 amperes with appropriate overcurrent protection. Fifty-ampere receptacles shall conform to the configuration shown in Figure 550.10(C). Informational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figure 14-50, for complete details of the 50-ampere plug and receptacle configuration. [550.32_(C)](https://2023.antflix.net#550.32_(C))", + "displayTitle": "(C) Rating", + "children": [], + "url": "https://2023.antflix.net#550.32_(C)" + }, + { + "body": "Means for connecting a mobile home accessory building or structure or additional electrical equipment located outside a mobile home by a fixed wiring method shall be provided in either the mobile home service equipment or the local external disconnecting means permitted in 550.32(A). [550.32_(D)](https://2023.antflix.net#550.32_(D))", + "displayTitle": "(D) Additional Outside Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#550.32_(D)" + }, + { + "body": "Receptacles located outside a mobile or manufactured home shall be provided with ground-fault circuit-interrupter protection as specified by 210.8(A). Where receptacles provide power to a mobile or manufactured home in accordance with 550.10, ground-fault circuit-interrupter protection shall not be required. [550.32_(E)](https://2023.antflix.net#550.32_(E))", + "displayTitle": "(E) Additional Receptacles", + "children": [], + "url": "https://2023.antflix.net#550.32_(E)" + }, + { + "body": "Outdoor mobile home disconnecting means shall be installed so the bottom of the enclosure containing the disconnecting means is not less than 600 mm (2 ft) above finished grade or working platform. The disconnecting means shall be installed so that the center of the grip of the operating handle, when in the highest position, is not more than 2.0 m (6 ft 7 in.) above the finished grade or working platform. [550.32_(F)](https://2023.antflix.net#550.32_(F))", + "displayTitle": "(F) Mounting Height", + "children": [], + "url": "https://2023.antflix.net#550.32_(F)" + }, + { + "body": "Where a 125/250-volt receptacle is used in mobile home service equipment, the service equipment shall be marked as follows: TURN DISCONNECTING SWITCH ORCIRCUIT BREAKER OFF BEFORE INSERTINGOR REMOVING PLUG. PLUG MUST BE FULLYINSERTED OR REMOVED. The marking shall be located on the service equipment adjacent to the receptacle outlet. [550.32_(G)](https://2023.antflix.net#550.32_(G))", + "displayTitle": "(G) Marking", + "children": [], + "url": "https://2023.antflix.net#550.32_(G)" + } + ], + "url": "https://2023.antflix.net#550.32" + }, + { + "displayTitle": "550.33 Feeder", + "children": [ + { + "body": "The feeder assembly, including the disconnecting means, shall not be mounted in or on the mobile home. A manufactured home feeder disconnecting means shall be permitted to be installed in or on the manufactured home in accordance with the requirements of 550.32(B). The feeder equipment shall be rated not less than that required in 550.32(C), mounted in a readily accessible outdoor location, and within sight from the mobile home or manufactured home it serves. Grounding of the disconnecting means shall be in accordance with 250.32. [550.33_(A)](https://2023.antflix.net#550.33_(A))", + "displayTitle": "(A) Feeder Equipment", + "children": [], + "url": "https://2023.antflix.net#550.33_(A)" + }, + { + "body": "Feeder conductors shall comply with the following: Feeder conductors shall consist of either a listed cord, factory installed in accordance with 550.10(B), or a permanently installed feeder consisting of four insulated, color-coded conductors that shall be identified by the factory or field marking of the conductors in compliance with 310.6. Equipment grounding conductors shall not be identified by stripping the insulation.Feeder conductors shall be installed in compliance with 250.32(B).Exception: An existing feeder installed without an equipment grounding conductor shall be permitted to comply with 250.32(B)(1) Exception No. 1. [550.33_(B)](https://2023.antflix.net#550.33_(B))", + "displayTitle": "(B) Feeder Conductors", + "children": [], + "url": "https://2023.antflix.net#550.33_(B)" + }, + { + "body": "Mobile home and manufactured home feeder circuit conductors shall have a capacity not less than the loads supplied, shall have an ampacity of not less than 100 amperes, and shall be permitted to be sized in accordance with 310.12. [550.33_(C)](https://2023.antflix.net#550.33_(C))", + "displayTitle": "(C) Feeder Capacity", + "children": [], + "url": "https://2023.antflix.net#550.33_(C)" + } + ], + "url": "https://2023.antflix.net#550.33" + } + ], + "url": "https://2023.antflix.net#550" + }, + { + "displayTitle": "Article 551 Recreational Vehicles and Recreational Vehicle Parks", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_87_I" + }, + { + "body": "This article covers the electrical conductors and equipment other than low-voltage and automotive vehicle circuits or extensions thereof, installed within or on recreational vehicles, the conductors that connect recreational vehicles to a supply of electricity, and the installation of equipment and devices related to electrical installations within a recreational vehicle park. Informational Note: See NFPA 1192-2021, Standard on Recreational Vehicles, and ANSI/RVIA LV-2020, Standard for Low Voltage Systems in Conversion and Recreational Vehicles, for information on low-voltage systems. [551.1](https://2023.antflix.net#551.1)", + "displayTitle": "551.1 Scope", + "children": [], + "url": "https://2023.antflix.net#551.1" + }, + { + "body": "The electrical datum plane distance(s) is determined by the normal high water level and encompasses the areas subject to tidal movement and areas in which the water level is affected by the conditions such as climate (rain or snowfall) or by human intervention (the opening and closing of dams or floodgates). The distance does not consider extremes due to natural or manmade disasters. [551.3](https://2023.antflix.net#551.3)", + "displayTitle": "551.3 Electrical Datum Plane Distances", + "children": [ + { + "body": "In land areas subject to tidal fluctuation, the electrical datum plane shall be a horizontal plane that is 606 mm (2 ft) above the highest high tide level for the area occurring under normal circumstances. [551.3_(A)](https://2023.antflix.net#551.3_(A))", + "displayTitle": "(A) Areas Subject to Tidal Fluctuations", + "children": [], + "url": "https://2023.antflix.net#551.3_(A)" + }, + { + "body": "In land areas not subject to tidal fluctuation, the electrical datum plane shall be a horizontal plane that is 606 mm (2 ft) above the normal high water level for the area occurring under normal circumstances. [551.3_(B)](https://2023.antflix.net#551.3_(B))", + "displayTitle": "(B) Areas Not Subject to Tidal Fluctuations", + "children": [], + "url": "https://2023.antflix.net#551.3_(B)" + } + ], + "url": "https://2023.antflix.net#551.3" + }, + { + "displayTitle": "551.4 General Requirements", + "children": [ + { + "body": "A recreational vehicle not used for the purposes as defined in 551.2 shall not be required to meet the requirements of Part IV pertaining to the number or capacity of circuits required. It shall, however, meet all other applicable requirements of this article if the recreational vehicle is provided with an electrical installation intended to be energized from a 120-volt, 208Y/120-volt, or 120/240-volt, nominal, ac power-supply system. [551.4_(A)](https://2023.antflix.net#551.4_(A))", + "displayTitle": "(A) Not Covered", + "children": [], + "url": "https://2023.antflix.net#551.4_(A)" + }, + { + "body": "This article covers combination electrical systems, generator installations, and 120-volt, 208Y/120-volt, or 120/240-volt, nominal, systems. Informational Note: See NFPA 1192-2021, Standard on Recreational Vehicles, and ANSI/RVIA 12V-2020, Standard for Low Voltage Systems in Conversion and Recreational Vehicles, for information on low-voltage systems. [551.4_(B)](https://2023.antflix.net#551.4_(B))", + "displayTitle": "(B) Systems", + "children": [], + "url": "https://2023.antflix.net#551.4_(B)" + }, + { + "body": "Labels required by Article 551 shall be made of etched, metal-stamped, or embossed brass; stainless steel; plastic laminates not less than 0.13 mm (0.005 in.) thick; or anodized or alclad aluminum not less than 0.5 mm (0.020 in.) thick or the equivalent. Informational Note: See ANSI Z535.4-2011, Product Safety Signs and Labels, for guidance on other label criteria used in the recreational vehicle industry. [551.4_(C)](https://2023.antflix.net#551.4_(C))", + "displayTitle": "(C) Labels", + "children": [], + "url": "https://2023.antflix.net#551.4_(C)" + } + ], + "url": "https://2023.antflix.net#551.4" + }, + { + "displayTitle": "Part II Combination Electrical Systems", + "children": [], + "url": "https://2023.antflix.net#divider_87_II" + }, + { + "displayTitle": "551.20 Combination Electrical Systems", + "children": [ + { + "body": "Vehicle wiring suitable for connection to a battery or dc supply source shall be permitted to be connected to a 120-volt source, provided the entire wiring system and equipment are rated and installed in full conformity with Parts I, II, III, IV, and V requirements of this article covering 120-volt electrical systems. Circuits fed from ac transformers shall not supply dc appliances. [551.20_(A)](https://2023.antflix.net#551.20_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#551.20_(A)" + }, + { + "body": "The 120-volt ac side of the voltage converter shall be wired in full conformity with the requirements of Parts I, II, and IV of this article for 120-volt electrical systems. Exception: Converters supplied as an integral part of a listed appliance shall not be subject to 551.20(B). All converters and transformers shall be listed for use in recreational vehicles and designed or equipped to provide overtemperature protection. To determine the converter rating, the following percentages shall be applied to the total connected load, including average battery-charging rate, of all 12-volt equipment: The first 20 amperes of load at 100 percent plus The second 20 amperes of load at 50 percent plus All load above 40 amperes at 25 percent Exception: A low-voltage appliance that is controlled by a momentary switch (normally open) that has no means for holding in the closed position or refrigerators with a 120-volt function shall not be considered as a connected load when determining the required converter rating. Momentarily energized appliances shall be limited to those used to prepare the vehicle for occupancy or travel. [551.20_(B)](https://2023.antflix.net#551.20_(B))", + "displayTitle": "(B) Voltage Converters (120-Volt Alternating Current to Low-Voltage Direct Current)", + "children": [], + "url": "https://2023.antflix.net#551.20_(B)" + }, + { + "body": "The non\u2014current-carrying metal enclosure of the voltage converter shall be connected to the frame of the vehicle with a minimum 8 AWG copper conductor. The voltage converter shall be provided with a separate chassis bonding conductor that shall not be used as a current-carrying conductor. [551.20_(C)](https://2023.antflix.net#551.20_(C))", + "displayTitle": "(C) Bonding Voltage Converter Enclosures", + "children": [], + "url": "https://2023.antflix.net#551.20_(C)" + }, + { + "body": "Fixtures, including luminaires, or appliances having both 120-volt and low-voltage connections shall be listed for dual voltage. [551.20_(D)](https://2023.antflix.net#551.20_(D))", + "displayTitle": "(D) Dual-Voltage Fixtures, Including Luminaires or Appliances", + "children": [], + "url": "https://2023.antflix.net#551.20_(D)" + }, + { + "body": "Autotransformers shall not be used. [551.20_(E)](https://2023.antflix.net#551.20_(E))", + "displayTitle": "(E) Autotransformers", + "children": [], + "url": "https://2023.antflix.net#551.20_(E)" + }, + { + "body": "Where a recreational vehicle is equipped with an ac system, a low-voltage system, or both, receptacles and plug caps of the low-voltage system shall differ in configuration from those of the ac system. Where a vehicle equipped with a battery or other low-voltage system has an external connection for low-voltage power, the connector shall have a configuration that will not accept ac power. [551.20_(F)](https://2023.antflix.net#551.20_(F))", + "displayTitle": "(F) Receptacles and Plug Caps", + "children": [], + "url": "https://2023.antflix.net#551.20_(F)" + } + ], + "url": "https://2023.antflix.net#551.20" + }, + { + "displayTitle": "Part III Other Power Sources", + "children": [], + "url": "https://2023.antflix.net#divider_77_III" + }, + { + "displayTitle": "551.30 Generator Installations", + "children": [ + { + "body": "Generators shall be mounted in such a manner as to be effectively bonded to the recreational vehicle chassis. The connection of the electrical system produced by the generator shall provide an effective ground-fault return path when operational. [551.30_(A)](https://2023.antflix.net#551.30_(A))", + "displayTitle": "(A) Mounting", + "children": [], + "url": "https://2023.antflix.net#551.30_(A)" + }, + { + "body": "Equipment shall be installed to ensure that the current-carrying conductors from the engine generator and from an outside source are not connected to a vehicle circuit at the same time. Automatic transfer switches in such applications shall be listed for use in one of the following: Emergency systemsOptional standby systemsReceptacles used as disconnecting means shall be accessible (as applied to wiring methods) and capable of interrupting their rated current without hazard to the operator. [551.30_(B)](https://2023.antflix.net#551.30_(B))", + "displayTitle": "(B) Generator Protection", + "children": [], + "url": "https://2023.antflix.net#551.30_(B)" + }, + { + "body": "Storage batteries and internal-combustion-driven generator units (subject to the provisions of this Code) shall be secured in place to avoid displacement from vibration and road shock. [551.30_(C)](https://2023.antflix.net#551.30_(C))", + "displayTitle": "(C) Installation of Storage Batteries and Generators", + "children": [], + "url": "https://2023.antflix.net#551.30_(C)" + }, + { + "body": "Compartments accommodating internal-combustion-driven generator units shall be provided with ventilation in accordance with instructions provided by the manufacturer of the generator unit. Informational Note: See NFPA 1192-2021, Standard on Recreational Vehicles, for generator compartment construction requirements. [551.30_(D)](https://2023.antflix.net#551.30_(D))", + "displayTitle": "(D) Ventilation of Generator Compartments", + "children": [], + "url": "https://2023.antflix.net#551.30_(D)" + }, + { + "body": "The supply conductors from the engine generator to the first termination on the vehicle shall be of the stranded type and be installed in listed flexible conduit or listed liquidtight flexible conduit. The point of first termination shall be in one of the following: PanelboardJunction box with a blank coverJunction box with a receptacleEnclosed transfer switchReceptacle assembly listed in conjunction with the generatorThe panelboard, enclosed transfer switch, or junction box with a receptacle shall be installed within 450 mm (18 in.) of the point of entry of the supply conductors into the vehicle. A junction box with a blank cover shall be mounted on the compartment wall inside or outside the compartment; to any part of the generator-supporting structure (but not to the generator); to the vehicle floor on the outside of the vehicle; or within 450 mm (18 in.) of the point of entry of the supply conductors into the vehicle. A receptacle assembly listed in conjunction with the generator shall be mounted in accordance with its listing. [551.30_(E)](https://2023.antflix.net#551.30_(E))", + "displayTitle": "(E) Supply Conductors", + "children": [], + "url": "https://2023.antflix.net#551.30_(E)" + } + ], + "url": "https://2023.antflix.net#551.30" + }, + { + "displayTitle": "551.31 Multiple Supply Source", + "children": [ + { + "body": "Where a multiple supply system consisting of an alternate power source and a power-supply cord is installed, the feeder from the alternate power source shall be protected by an overcurrent protective device. Installation shall be in accordance with 551.30(A), 551.30(B), and 551.40. [551.31_(A)](https://2023.antflix.net#551.31_(A))", + "displayTitle": "(A) Multiple Supply Sources", + "children": [], + "url": "https://2023.antflix.net#551.31_(A)" + }, + { + "body": "The multiple supply sources shall not be required to be of the same capacity. [551.31_(B)](https://2023.antflix.net#551.31_(B))", + "displayTitle": "(B) Multiple Supply Sources Capacity", + "children": [], + "url": "https://2023.antflix.net#551.31_(B)" + }, + { + "body": "If an alternate power source exceeds 30 amperes, 120 volts, nominal, it shall be permissible to wire it as a 120-volt, nominal, system, a 208Y/120-volt, nominal, system, or a 120/240-volt, nominal, system, provided an overcurrent protective device of the proper rating is installed in the feeder. [551.31_(C)](https://2023.antflix.net#551.31_(C))", + "displayTitle": "(C) Alternate Power Sources Exceeding 30 Amperes", + "children": [], + "url": "https://2023.antflix.net#551.31_(C)" + }, + { + "body": "The external feeder assembly shall be permitted to be less than the calculated load but not less than 30 amperes and shall have overcurrent protection not greater than the capacity of the external feeder assembly. [551.31_(D)](https://2023.antflix.net#551.31_(D))", + "displayTitle": "(D) Feeder Assembly Not Less Than 30 Amperes", + "children": [], + "url": "https://2023.antflix.net#551.31_(D)" + } + ], + "url": "https://2023.antflix.net#551.31" + }, + { + "body": "Other sources of ac power, such as inverters, motor generators, or engine generators, shall be listed for use in recreational vehicles and shall be installed in accordance with the terms of the listing. Other sources of ac power shall be wired in full conformity with the requirements in Parts I, II, III, IV, and V of this article covering 120-volt electrical systems. [551.32](https://2023.antflix.net#551.32)", + "displayTitle": "551.32 Other Sources", + "children": [], + "url": "https://2023.antflix.net#551.32" + }, + { + "body": "Transfer equipment, if not integral with the listed power source, shall be installed to ensure that the current-carrying conductors from other sources of ac power and from an outside source are not connected to the vehicle circuit at the same time. Automatic transfer switches in such applications shall be listed for use in one of the following: Emergency systemsOptional standby systems [551.33](https://2023.antflix.net#551.33)", + "displayTitle": "551.33 Alternate Source Restrictions", + "children": [], + "url": "https://2023.antflix.net#551.33" + }, + { + "displayTitle": "Part IV Nominal 120-Volt or 120/240-Volt Systems", + "children": [], + "url": "https://2023.antflix.net#divider_25_IV" + }, + { + "displayTitle": "551.40 120-Volt or 120/240-Volt, Nominal, Systems", + "children": [ + { + "body": "The electrical equipment and material of recreational vehicles indicated for connection to a wiring system rated 120 volts, nominal, 2-wire with equipment grounding conductor, or a wiring system rated 120/240 volts, nominal, 3-wire with equipment grounding conductor, shall be listed and installed in accordance with Parts I, II, III, IV, and V of this article. Electrical equipment connected line-to-line shall have a nominal voltage rating of 208-230 volts. [551.40_(A)](https://2023.antflix.net#551.40_(A))", + "displayTitle": "(A) General Requirements", + "children": [], + "url": "https://2023.antflix.net#551.40_(A)" + }, + { + "body": "Electrical materials, devices, appliances, fittings, and other equipment installed in, intended for use in, or attached to the recreational vehicle shall be listed. All products shall be used only in the manner in which they have been tested and found suitable for the intended use. [551.40_(B)](https://2023.antflix.net#551.40_(B))", + "displayTitle": "(B) Materials and Equipment", + "children": [], + "url": "https://2023.antflix.net#551.40_(B)" + }, + { + "body": "The internal wiring of a recreational vehicle having only one 15- or 20-ampere branch circuit as permitted in 551.42(A) and (B) shall have ground-fault circuit-interrupter protection for personnel. The ground-fault circuit interrupter shall be installed at the point where the power supply assembly terminates within the recreational vehicle. Where a separable cord set is not employed, the ground-fault circuit interrupter shall be permitted to be an integral part of the attachment plug of the feeder assembly. The ground-fault circuit interrupter shall provide protection also under the conditions of an open grounded circuit conductor, interchanged circuit conductors, or both. [551.40_(C)](https://2023.antflix.net#551.40_(C))", + "displayTitle": "(C) Ground-Fault Circuit-Interrupter Protection", + "children": [], + "url": "https://2023.antflix.net#551.40_(C)" + }, + { + "body": "Each recreational vehicle shall have a listed grounding monitor interrupter permanently installed between the feeder assembly connection to the vehicle and before either a transfer switch if installed or the panelboard. This requirement shall become effective January 1, 2026. [551.40_(D)](https://2023.antflix.net#551.40_(D))", + "displayTitle": "(D) Loss of Ground Device", + "children": [], + "url": "https://2023.antflix.net#551.40_(D)" + } + ], + "url": "https://2023.antflix.net#551.40" + }, + { + "displayTitle": "551.41 Receptacle Outlets Required", + "children": [ + { + "body": "Receptacle outlets shall be installed at wall spaces 600 mm (2 ft) wide or more so that no point along the floor line is more than 1.8 m (6 ft), measured horizontally, from an outlet in that space. Exception No. 1: Bath and hallway areas shall not be required to comply with 551.41(A). Exception No. 2: Wall spaces occupied by kitchen cabinets, wardrobe cabinets, built-in furniture, behind doors that can open fully against a wall surface, or similar facilities shall not be required to comply with 551.41(A). Exception No. 3: Wall spaces in the special transportation area of a recreational vehicle designed to transport internal combustion vehicles shall not be required to comply with 551.41(A). [551.41_(A)](https://2023.antflix.net#551.41_(A))", + "displayTitle": "(A) Spacing", + "children": [], + "url": "https://2023.antflix.net#551.41_(A)" + }, + { + "body": "Receptacle outlets shall be installed as follows: Adjacent to countertops in the kitchen [at least one on each side of the sink if countertops are on each side and are 300 mm (12 in.) or over in width and depth].Adjacent to the refrigerator and gas range space, except where a gas-fired refrigerator or cooking appliance, requiring no external electrical connection, is factory installed.Adjacent to countertop spaces of 300 mm (12 in.) or more in width and depth that cannot be reached from a receptacle required in 551.41(B)(1) by a cord of 1.8 m (6 ft) without crossing a traffic area, cooking appliance, or sink.Rooftop decks that are accessible from inside the recreational vehicle shall have at least one receptacle installed within the perimeter of the rooftop deck. The receptacle shall not be located more than 1.2 m (4 ft) above the balcony, deck, or porch surface. The receptacle shall comply with the requirements of 406.9(B) for wet locations.A special transportation area of recreational vehicles designed to transport internal combustion engine vehicles shall have at least one receptacle installed. [551.41_(B)](https://2023.antflix.net#551.41_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#551.41_(B)" + }, + { + "body": "Where provided, each 125-volt, single-phase, 15- or 20-ampere receptacle outlet shall have ground-fault circuit-interrupter protection for personnel in the following locations: Adjacent to a bathroom lavatoryWhere the receptacles are installed to serve the countertop surfaces and are within 1.8 m (6 ft) of any lavatory or sinkException No. 1: Receptacles installed for appliances in dedicated spaces, such as for disposals, refrigerators, and freezers shall not require ground-fault circuit-interrupter protection.Exception No. 2: Single receptacles for interior connections of expandable room sections shall not require ground-fault circuit-interrupter protection.Exception No. 3: De-energized receptacles that are within 1.8 m (6 ft) of any sink or lavatory due to the retraction of the expandable room section shall not require ground-fault circuit-interrupter protection.In the area occupied by a toilet, shower, tub, or any combination thereofOn the exterior of the vehicleException: Receptacles that are located inside of an access panel that is installed on the exterior of the vehicle to supply power for an installed appliance shall not be required to have ground-fault circuit-interrupter protection.In the special transportation area of a recreational vehicle that is separated from the living area by a wallThe receptacle outlet shall be permitted in a listed luminaire. A receptacle outlet shall not be installed in a tub or combination tub\u2014shower compartment. [551.41_(C)](https://2023.antflix.net#551.41_(C))", + "displayTitle": "(C) Ground-Fault Circuit-Interrupter Protection", + "children": [], + "url": "https://2023.antflix.net#551.41_(C)" + }, + { + "body": "A receptacle shall not be installed in a face-up position in any countertop or similar horizontal surface. [551.41_(D)](https://2023.antflix.net#551.41_(D))", + "displayTitle": "(D) Face-Up Position", + "children": [], + "url": "https://2023.antflix.net#551.41_(D)" + } + ], + "url": "https://2023.antflix.net#551.41" + }, + { + "body": "Each recreational vehicle containing an ac electrical system shall contain one of the circuit arrangements in 551.42(A) through (D). [551.42](https://2023.antflix.net#551.42)", + "displayTitle": "551.42 Branch Circuits Required", + "children": [ + { + "body": "One 15-ampere circuit to supply lights, receptacle outlets, and fixed appliances. Such recreational vehicles shall be equipped with one 15-ampere switch and fuse or one 15-ampere circuit breaker. [551.42_(A)](https://2023.antflix.net#551.42_(A))", + "displayTitle": "(A) One 15-Ampere Circuit", + "children": [], + "url": "https://2023.antflix.net#551.42_(A)" + }, + { + "body": "One 20-ampere circuit to supply lights, receptacle outlets, and fixed appliances. Such recreational vehicles shall be equipped with one 20-ampere switch and fuse or one 20-ampere circuit breaker. [551.42_(B)](https://2023.antflix.net#551.42_(B))", + "displayTitle": "(B) One 20-Ampere Circuit", + "children": [], + "url": "https://2023.antflix.net#551.42_(B)" + }, + { + "body": "Two to five 15- or 20-ampere circuits to supply lights, receptacle outlets, and fixed appliances shall be permitted. Such recreational vehicles shall be permitted to be equipped with panelboards rated 120 volts maximum or 120/240 volts maximum and listed for 30-ampere application supplied by the appropriate feeder assemblies. Not more than two 120-volt thermostatically controlled appliances shall be installed in such systems unless appliance isolation switching, energy management systems, or similar methods are used. Exception No. 1: Additional 15- or 20-ampere circuits shall be permitted where a listed energy management system rated at 30-amperes maximum is employed within the system. Exception No. 2: Six 15- or 20-ampere circuits shall be permitted without employing an energy management system, provided that the added sixth circuit serves only the power converter, and the combined load of all six circuits does not exceed the allowable load that was designed for use by the original five circuits. Informational Note: See 210.23(B) for permissible loads. See 551.45(C) for main disconnect and overcurrent protection requirements. [551.42_(C)](https://2023.antflix.net#551.42_(C))", + "displayTitle": "(C) Two to Five 15- or 20-Ampere Circuits", + "children": [], + "url": "https://2023.antflix.net#551.42_(C)" + }, + { + "body": "A 50-ampere, 120/208-240-volt feeder assembly and a minimum 50-ampere-rated panelboard shall be used where six or more circuits are employed. The load distribution shall ensure a reasonable current balance between phases. [551.42_(D)](https://2023.antflix.net#551.42_(D))", + "displayTitle": "(D) More Than Five Circuits Without a Listed Energy Management System", + "children": [], + "url": "https://2023.antflix.net#551.42_(D)" + } + ], + "url": "https://2023.antflix.net#551.42" + }, + { + "displayTitle": "551.43 Branch-Circuit Protection", + "children": [ + { + "body": "The branch-circuit overcurrent devices shall be rated as follows: Not more than the circuit conductors, andNot more than 150 percent of the rating of a single appliance rated 13.3 amperes or more and supplied by an individual branch circuit, butNot more than the overcurrent protection size marked on an air conditioner or other motor-operated appliances [551.43_(A)](https://2023.antflix.net#551.43_(A))", + "displayTitle": "(A) Rating", + "children": [], + "url": "https://2023.antflix.net#551.43_(A)" + }, + { + "body": "A 20-ampere fuse or circuit breaker shall be permitted for protection for fixtures, including luminaires, leads, cords, or small appliances, and 14 AWG tap conductors, not over 1.8 m (6 ft) long for recessed luminaires. [551.43_(B)](https://2023.antflix.net#551.43_(B))", + "displayTitle": "(B) Protection for Smaller Conductors", + "children": [], + "url": "https://2023.antflix.net#551.43_(B)" + }, + { + "body": "If more than one receptacle or load is on a branch circuit, 15-ampere receptacles shall be permitted to be protected by a 20-ampere fuse or circuit breaker. [551.43_(C)](https://2023.antflix.net#551.43_(C))", + "displayTitle": "(C) Fifteen-Ampere Receptacles Considered Protected by 20 Amperes", + "children": [], + "url": "https://2023.antflix.net#551.43_(C)" + } + ], + "url": "https://2023.antflix.net#551.43" + }, + { + "body": "Each recreational vehicle shall have only one of the main feeder assemblies covered in 551.44(A) through (D). [551.44](https://2023.antflix.net#551.44)", + "displayTitle": "551.44 Feeder Assembly", + "children": [ + { + "body": "Recreational vehicles wired in accordance with 551.42(A) shall use a listed 15-ampere or larger main feeder assembly. [551.44_(A)](https://2023.antflix.net#551.44_(A))", + "displayTitle": "(A) Fifteen-Ampere Main Feeder Assembly", + "children": [], + "url": "https://2023.antflix.net#551.44_(A)" + }, + { + "body": "Recreational vehicles wired in accordance with 551.42(B) shall use a listed 20-ampere or larger main feeder assembly. [551.44_(B)](https://2023.antflix.net#551.44_(B))", + "displayTitle": "(B) Twenty-Ampere Main Feeder Assembly", + "children": [], + "url": "https://2023.antflix.net#551.44_(B)" + }, + { + "body": "Recreational vehicles wired in accordance with 551.42(C) shall use a listed 30-ampere or larger main feeder assembly. [551.44_(C)](https://2023.antflix.net#551.44_(C))", + "displayTitle": "(C) Thirty-Ampere Main Feeder Assembly", + "children": [], + "url": "https://2023.antflix.net#551.44_(C)" + }, + { + "body": "Recreational vehicles wired in accordance with 551.42(D) shall use a listed 50-ampere, 120/208-240-volt main feeder assembly. [551.44_(D)](https://2023.antflix.net#551.44_(D))", + "displayTitle": "(D) Fifty-Ampere Feeder Assembly", + "children": [], + "url": "https://2023.antflix.net#551.44_(D)" + } + ], + "url": "https://2023.antflix.net#551.44" + }, + { + "displayTitle": "551.45 Panelboard", + "children": [ + { + "body": "A listed and appropriately rated panelboard or other equipment specifically listed for this purpose shall be used. The grounded conductor termination bar shall be insulated from the enclosure as provided in 551.54(C). An equipment grounding terminal bar shall be attached inside the enclosure of the panelboard. [551.45_(A)](https://2023.antflix.net#551.45_(A))", + "displayTitle": "(A) Listed and Appropriately Rated", + "children": [], + "url": "https://2023.antflix.net#551.45_(A)" + }, + { + "body": "The panelboard shall be installed in a readily accessible location with the RV in the setup mode. Working clearance for the panelboard with the RV in the setup mode shall be not less than 600 mm (24 in.) wide and 750 mm (30 in.) deep. Exception No. 1: Where the panelboard cover is exposed to the inside aisle space, one of the working clearance dimensions shall be permitted to be reduced to a minimum of 550 mm (22 in.). A panelboard is considered exposed where the panelboard cover is within 50 mm (2 in.) of the aisle's finished surface or not more than 25 mm (1 in.) from the backside of doors that enclose the space. Exception No. 2: Compartment doors used for access to a generator shall be permitted to be equipped with a locking system. [551.45_(B)](https://2023.antflix.net#551.45_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#551.45_(B)" + }, + { + "body": "The panelboard shall be of the dead-front type and shall consist of one or more circuit breakers or Type S fuseholders. A main disconnecting means shall be provided where fuses are used or where more than two circuit breakers are employed. A main overcurrent protective device not exceeding the feeder assembly rating shall be provided where more than two branch circuits are employed. [551.45_(C)](https://2023.antflix.net#551.45_(C))", + "displayTitle": "(C) Dead-Front Type", + "children": [], + "url": "https://2023.antflix.net#551.45_(C)" + } + ], + "url": "https://2023.antflix.net#551.45" + }, + { + "displayTitle": "551.46 Means for Connecting to Power Supply", + "children": [ + { + "body": "The feeder assembly or assemblies shall be factory supplied or factory installed and be of one of the ty pes specified herein. [551.46_(A)](https://2023.antflix.net#551.46_(A))", + "displayTitle": "(A) Assembly", + "children": [ + { + "body": "Where a separable feeder assembly consisting of a cord with a female connector and molded attachment plug cap is provided, the vehicle shall be equipped with a permanently mounted, flanged surface inlet (male, recessed-type motor-base attachment plug) wired directly to the panelboard by an approved wiring method. The attachment plug cap shall be of a listed type. [551.46_(A)_(1)](https://2023.antflix.net#551.46_(A)_(1))", + "displayTitle": "(1) Separable", + "children": [], + "url": "https://2023.antflix.net#551.46_(A)_(1)" + }, + { + "body": "Each feeder assembly shall be connected directly to the terminals of the panelboard or conductors within a junction box and provided with means to prevent strain from being transmitted to the terminals. The ampacity of the conductors between each junction box and the terminals of each panelboard shall be at least equal to the ampacity of the power-supply cord. The supply end of the assembly shall be equipped with an attachment plug of the type described in 551.46(C). Where the cord passes through the walls or floors, it shall be protected by means of conduit and bushings or equivalent. The cord assembly shall have permanent provisions for protection against corrosion and mechanical damage while the vehicle is in transit and while the cord assembly is being stored or removed for use. [551.46_(A)_(2)](https://2023.antflix.net#551.46_(A)_(2))", + "displayTitle": "(2) Permanently Connected", + "children": [], + "url": "https://2023.antflix.net#551.46_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#551.46_(A)" + }, + { + "body": "The cord exposed usable length shall be measured from the point of entrance to the recreational vehicle or the face of the flanged surface inlet (motor-base attachment plug) to the face of the attachment plug at the supply end. The cord exposed usable length, measured to the point of entry on the vehicle exterior, shall be a minimum of 7.5 m (25 ft) where the point of entrance is at the side of the vehicle or shall be a minimum 9.0 m (30 ft) where the point of entrance is at the rear of the vehicle. Where the cord entrance into the vehicle is more than 900 mm (3 ft) above the ground, the minimum cord lengths above shall be increased by the vertical distance of the cord entrance heights above 900 mm (3 ft). Informational Note: See 551.46(E) for location of point of entrance of a power-supply assembly on the recreational vehicle exterior. [551.46_(B)](https://2023.antflix.net#551.46_(B))", + "displayTitle": "(B) Cord", + "children": [], + "url": "https://2023.antflix.net#551.46_(B)" + }, + { + "displayTitle": "(C) Attachment Plugs", + "children": [ + { + "body": "Recreational vehicles having only one 15-ampere branch circuit as permitted by 551.42(A) shall have an attachment plug that shall be 2-pole, 3-wire grounding type, rated 15 amperes, 125 volts, conforming to the configuration shown in Figure 551.46(C)(1). Informational Note: See ANSI/ NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figure 5.15, for complete details of this configuration. [551.46_(C)_(1)](https://2023.antflix.net#551.46_(C)_(1))", + "displayTitle": "(1) Units With One 15-Ampere Branch Circuit", + "children": [], + "url": "https://2023.antflix.net#551.46_(C)_(1)" + }, + { + "body": "Recreational vehicles having only one 20-ampere branch circuit as permitted in 551.42(B) shall have an attachment plug that shall be 2-pole, 3-wire grounding type, rated 20 amperes, 125 volts, conforming to the configuration shown in Figure 551.46(C)(1). Informational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figure 5.20, for complete details of this configuration. [551.46_(C)_(2)](https://2023.antflix.net#551.46_(C)_(2))", + "displayTitle": "(2) Units With One 20-Ampere Branch Circuit", + "children": [], + "url": "https://2023.antflix.net#551.46_(C)_(2)" + }, + { + "body": "Recreational vehicles wired in accordance with 551.42(C) shall have an attachment plug that shall be 2-pole, 3-wire grounding type, rated 30 amperes, 125 volts, conforming to the configuration shown in Figure 551.46(C)(1) intended for use with units rated at 30 amperes, 125 volts. Informational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figure TT, for complete details of this configuration. [551.46_(C)_(3)](https://2023.antflix.net#551.46_(C)_(3))", + "displayTitle": "(3) Units With Two to Five 15- or 20-Ampere Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#551.46_(C)_(3)" + }, + { + "body": "Recreational vehicles having a power-supply assembly rated 50 amperes as permitted by 551.42(D) shall have a 3-pole, 4-wire grounding-type attachment plug rated 50 amperes, 125/250 volts, conforming to the configuration shown in Figure 551.46(C)(1). Informational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figure 14.50, for complete details of this configuration. [551.46_(C)_(4)](https://2023.antflix.net#551.46_(C)_(4))", + "displayTitle": "(4) Units With 50-Ampere Power-Supply Assembly", + "children": [], + "url": "https://2023.antflix.net#551.46_(C)_(4)" + } + ], + "url": "https://2023.antflix.net#551.46_(C)" + }, + { + "body": "Each recreational vehicle shall have a safety label with the signal word WARNING in minimum 6-mm (1/4-in. ) high letters and body text in minimum 3-mm (1/8-in.) high letters on a contrasting background. The safety label shall be affixed to the exterior skin, at or near the point of entrance of the power-supply cord(s), and shall read, using one of the following warnings, as appropriate: WARNINGTHIS CONNECTION IS FOR 110\u2014125-VOLT AC,60 HZ, _____ AMPERE SUPPLY.DO NOT EXCEED CIRCUIT RATING.EXCEEDING THE CIRCUIT RATING CAN CAUSE AFIRE AND RESULT IN DEATH OR SERIOUS INJURY. or WARNINGTHIS CONNECTION IS FOR 208Y/120-VOLT120/240-VOLT AC, 3-POLE, 4-WIRE, 60 HZ, ________ AMPERESUPPLY. DO NOT EXCEED CIRCUIT RATING. EXCEEDING THE CIRCUIT RATING CAN CAUSE AFIRE AND RESULT IN DEATH OR SERIOUS INJURY. The correct ampere rating shall be marked in the blank space. [551.46_(D)](https://2023.antflix.net#551.46_(D))", + "displayTitle": "(D) Labeling at Electrical Entrance", + "children": [], + "url": "https://2023.antflix.net#551.46_(D)" + }, + { + "body": "The point of entrance of a power-supply assembly shall be located within 4.5 m (15 ft) of the rear, on the left (road) side or at the rear, left of the longitudinal center of the vehicle, within 450 mm (18 in.) of the outside wall. Exception No. 1: A recreational vehicle equipped with only a listed flexible drain system or a side-vent drain system shall be permitted to have the electrical point of entrance located on either side, provided the drain(s) for the plumbing system is (are) located on the same side. Exception No. 2: A recreational vehicle shall be permitted to have the electrical point of entrance located more than 4.5 m (15 ft) from the rear. Where this occurs, the distance beyond the 4.5-m (15-ft) dimension shall be added to the cord's minimum length as specified in 551.46(B). Exception No. 3: Recreational vehicles designed for transporting livestock shall be permitted to have the electrical point of entrance located on either side or the front. FIGURE 551.46(C)(1) Configurations for Grounding-Type Receptacles and Attachment Plug Caps Used for Recreational Vehicle Supply Cords and Recreational Vehicle Lots. [551.46_(E)](https://2023.antflix.net#551.46_(E))", + "displayTitle": "(E) Location", + "children": [], + "url": "https://2023.antflix.net#551.46_(E)" + } + ], + "url": "https://2023.antflix.net#551.46" + }, + { + "displayTitle": "551.47 Wiring Methods", + "children": [ + { + "body": "Cables and raceways installed in accordance with Articles 320, 322, 330 through 340, 342 through 362, 386, and 388 shall be permitted in accordance with their applicable article, except as otherwise specified in this article. An equipment grounding means shall be provided in accordance with 250.118. [551.47_(A)](https://2023.antflix.net#551.47_(A))", + "displayTitle": "(A) Wiring Systems", + "children": [], + "url": "https://2023.antflix.net#551.47_(A)" + }, + { + "body": "Where rigid metal conduit or intermediate metal conduit is terminated at an enclosure with a locknut and bushing connection, two locknuts shall be provided, one inside and one outside of the enclosure. All cut ends of conduit and tubing shall be reamed or otherwise finished to remove rough edges. [551.47_(B)](https://2023.antflix.net#551.47_(B))", + "displayTitle": "(B) Conduit and Tubing", + "children": [], + "url": "https://2023.antflix.net#551.47_(B)" + }, + { + "body": "Nonmetallic boxes shall be acceptable only with nonmetallic-sheathed cable or nonmetallic raceways. [551.47_(C)](https://2023.antflix.net#551.47_(C))", + "displayTitle": "(C) Nonmetallic Boxes", + "children": [], + "url": "https://2023.antflix.net#551.47_(C)" + }, + { + "body": "In walls and ceilings constructed of wood or other combustible material, boxes and fittings shall be flush with the finished surface or project therefrom. [551.47_(D)](https://2023.antflix.net#551.47_(D))", + "displayTitle": "(D) Boxes", + "children": [], + "url": "https://2023.antflix.net#551.47_(D)" + }, + { + "body": "Wall and ceiling boxes shall be mounted in accordance with 314.23. Exception No. 1: Snap-in-type boxes or boxes provided with special wall or ceiling brackets that securely fasten boxes in walls or ceilings shall be permitted. Exception No. 2: A wooden plate providing a 38-mm (11/2-in.) minimum width backing around the box and of a thickness of 13 mm (1/2 in.) or greater (actual) attached directly to the wall panel shall be considered, as approved means for mounting outlet boxes. [551.47_(E)](https://2023.antflix.net#551.47_(E))", + "displayTitle": "(E) Mounting", + "children": [], + "url": "https://2023.antflix.net#551.47_(E)" + }, + { + "body": "Raceways and cable sheaths shall be continuous between boxes and other enclosures. [551.47_(F)](https://2023.antflix.net#551.47_(F))", + "displayTitle": "(F) Raceway and Cable Continuity", + "children": [], + "url": "https://2023.antflix.net#551.47_(F)" + }, + { + "body": "Metal-clad, Type AC, or nonmetallic-sheathed cables and electrical nonmetallic tubing shall be permitted to pass through the centers of the wide side of 2 by 4 wood studs. However, they shall be protected where they pass through 2 by 2 wood studs or at other wood studs or frames where the cable or tubing would be less than 32 mm (11/4 in.) from the inside or outside surface. Steel plates on each side of the cable or tubing or a steel tube, with not less than 1.35 mm (0.053 in.) wall thickness, shall be installed to protect the cable or tubing. These plates or tubes shall be securely held in place. Where nonmetallic-sheathed cables pass through punched, cut, or drilled slots or holes in metal members, the cable shall be protected by bushings or grommets securely fastened in the opening prior to installation of the cable. [551.47_(G)](https://2023.antflix.net#551.47_(G))", + "displayTitle": "(G) Protected", + "children": [], + "url": "https://2023.antflix.net#551.47_(G)" + }, + { + "body": "No bend shall have a radius of less than five times the cable diameter. [551.47_(H)](https://2023.antflix.net#551.47_(H))", + "displayTitle": "(H) Bends", + "children": [], + "url": "https://2023.antflix.net#551.47_(H)" + }, + { + "body": "Where connected with cable connectors or clamps, cables shall be secured and supported within 300 mm (12 in.) of outlet boxes, panelboards, and splice boxes on appliances. Supports and securing shall be provided at intervals not exceeding 1.4 m (41/2 ft) at other places. [551.47_(I)](https://2023.antflix.net#551.47_(I))", + "displayTitle": "(I) Cable Supports", + "children": [], + "url": "https://2023.antflix.net#551.47_(I)" + }, + { + "body": "Nonmetallic-sheathed cables shall be secured and supported within 200 mm (8 in.) of a nonmetallic outlet box without cable clamps. Where wiring devices with integral enclosures are employed with a loop of extra cable to permit future replacement of the device, the cable loop shall be considered as an integral portion of the device. [551.47_(J)](https://2023.antflix.net#551.47_(J))", + "displayTitle": "(J) Nonmetallic Box Without Cable Clamps", + "children": [], + "url": "https://2023.antflix.net#551.47_(J)" + }, + { + "body": "Where subject to physical damage, exposed nonmetallic cable shall be protected by covering boards, guard strips, raceways, or other means. [551.47_(K)](https://2023.antflix.net#551.47_(K))", + "displayTitle": "(K) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#551.47_(K)" + }, + { + "body": "Metal faceplates shall comply with 406.6(A). Nonmetallic faceplates shall comply with 406.6(C). [551.47_(L)](https://2023.antflix.net#551.47_(L))", + "displayTitle": "(L) Receptacle Faceplates", + "children": [], + "url": "https://2023.antflix.net#551.47_(L)" + }, + { + "body": "Metal faceplates shall be installed in compliance with 404.9(B) and 404.6(B). [551.47_(M)](https://2023.antflix.net#551.47_(M))", + "displayTitle": "(M) Metal Faceplates Grounded", + "children": [], + "url": "https://2023.antflix.net#551.47_(M)" + }, + { + "body": "Wiring shall be protected in accordance with the following: Where outdoor or under-chassis line-voltage (120 volts, nominal, or higher) wiring is exposed, it shall be protected by a conduit or raceway identified for use in wet locations. The conductors shall be listed for use in wet locations.Where wiring is exposed to physical damage, it shall be protected by a raceway. [551.47_(N)](https://2023.antflix.net#551.47_(N))", + "displayTitle": "(N) Moisture or Physical Damage", + "children": [], + "url": "https://2023.antflix.net#551.47_(N)" + }, + { + "body": "Fittings and connectors that are intended to be concealed at the time of assembly shall be listed and identified for the interconnection of building components. Such fittings and connectors shall be equal to the wiring method employed in insulation, temperature rise, and fault-current withstanding and shall be capable of enduring the vibration and shock occurring in recreational vehicles. [551.47_(O)](https://2023.antflix.net#551.47_(O))", + "displayTitle": "(O) Component Interconnections", + "children": [], + "url": "https://2023.antflix.net#551.47_(O)" + }, + { + "body": "The method of connecting expandable units to the main body of the vehicle shall comply with 551.47 (P)(1) or (P)(2). [551.47_(P)](https://2023.antflix.net#551.47_(P))", + "displayTitle": "(P) Method of Connecting Expandable Units", + "children": [ + { + "body": "Cord-and-plug connections shall comply with 551.47(P)(1)(a) through (P)(1)(d). That portion of a branch circuit that is installed in an expandable unit shall be permitted to be connected to the portion of the branch circuit in the main body of the vehicle by means of an attachment plug and cord listed for hard usage. The cord and its connections shall comply with Part I and Part II, as applicable, of Article 400 and shall be considered as a permitted use under 400.10. Where the attachment plug and cord are located within the vehicle's interior, use of plastic thermoset or elastomer parallel cord Type SPT-3, SP-3, or SPE shall be permitted.Where the receptacle provided for connection of the cord to the main circuit is located on the outside of the vehicle, it shall be protected with a ground-fault circuit interrupter for personnel and be listed for wet locations. A cord located on the outside of a vehicle shall be identified for outdoor use.Unless removable or stored within the vehicle interior, the cord assembly shall have permanent provisions for protection against corrosion and mechanical damage while the vehicle is in transit.The attachment plug and cord shall be installed so as not to permit exposed live attachment plug pins. [551.47_(P)_(1)](https://2023.antflix.net#551.47_(P)_(1))", + "displayTitle": "(1) Cord-and-Plug-Connected", + "children": [], + "url": "https://2023.antflix.net#551.47_(P)_(1)" + }, + { + "body": "That portion of a branch circuit that is installed in an expandable unit shall be permitted to be connected to the portion of the branch circuit in the main body of the vehicle by means of flexible cord installed in accordance with 551.47(P)(2)(a) through (P)(2)(e) or other approved wiring method. The flexible cord shall be listed for hard usage and for use in wet locations.The flexible cord shall be permitted to be exposed on the underside of the vehicle.The flexible cord shall be permitted to pass through the interior of a wall or floor assembly or both a maximum concealed length of 600 mm (24 in.) before terminating at an outlet or junction box.Where concealed, the flexible cord shall be installed in nonflexible conduit or tubing that is continuous from the outlet or junction box inside the recreational vehicle to a weatherproof outlet box, junction box, or strain relief fitting listed for use in wet locations that is located on the underside of the recreational vehicle. The outer jacket of the flexible cord shall be continuous into the outlet or junction box.Where the flexible cord passes through the floor to an exposed area inside of the recreational vehicle, it shall be protected by means of conduit and bushings or equivalent.Where subject to physical damage, the flexible cord shall be protected with RMC, IMC, Schedule 80 PVC, reinforced thermosetting resin conduit (RTRC) listed for exposure to physical damage, or other approved means and shall extend at least 150 mm (6 in.) above the floor. A means shall be provided to secure the flexible cord where it enters the recreational vehicle. [551.47_(P)_(2)](https://2023.antflix.net#551.47_(P)_(2))", + "displayTitle": "(2) Direct Wired", + "children": [], + "url": "https://2023.antflix.net#551.47_(P)_(2)" + } + ], + "url": "https://2023.antflix.net#551.47_(P)" + }, + { + "body": "Prewiring installed for the purpose of facilitating future air-conditioning installation shall comply with the applicable portions of this article and the following: An overcurrent protective device with a rating compatible with the circuit conductors shall be installed in the panelboard and wiring connections completed.The load end of the circuit shall terminate in a junction box with a blank cover or other listed enclosure. Where a junction box with a blank cover is used, the free ends of the conductors shall be adequately capped or taped.A safety label with the signal word WARNING in minimum 6-mm (1/4-in.) high letters and body text in minimum 3-mm (1/8-in.) high letters on a contrasting background shall be affixed on or adjacent to the junction box and shall read as follows:WARNINGAIR-CONDITIONING CIRCUIT.THIS CONNECTION IS FOR AIR CONDITIONERS RATED 110\u2014125-VOLT AC, 60 HZ, ___ AMPERES MAXIMUM.DO NOT EXCEED CIRCUIT RATING.EXCEEDING THE CIRCUIT RATING MAYCAUSE A FIRE AND RESULT IN DEATHOR SERIOUS INJURY.An ampere rating, not to exceed 80 percent of the circuit rating, shall be legibly marked in the blank space.The circuit shall serve no other purpose. [551.47_(Q)](https://2023.antflix.net#551.47_(Q))", + "displayTitle": "(Q) Prewiring for Air-Conditioning Installation", + "children": [], + "url": "https://2023.antflix.net#551.47_(Q)" + }, + { + "body": "Prewiring installed for the purpose of facilitating future generator installation shall comply with the other applicable portions of this article and the following: Circuit conductors shall be appropriately sized in relation to the anticipated load as stated on the label required in 551.47(R)(4).Where junction boxes are utilized at either of the circuit originating or terminus points, free ends of the conductors shall be adequately capped or taped.Where devices such as receptacle outlet, transfer switch, and so forth, are installed, the installation shall be complete, including circuit conductor connections.A safety label with the signal word WARNING in minimum 6 mm (1/4 in.) high letters and body text in minimum 3 mm (1/8 in.) high letters on a contrasting background shall be affixed on the cover of each junction box or transfer switch containing incomplete circuitry and shall read, using one of the following warnings, as appropriate:WARNINGGENERATORONLY INSTALL A GENERATOR LISTED SPECIFICALLYFOR RV USE HAVING OVERCURRENTPROTECTION RATED 110\u2014125-VOLT AC, 60 HZ, __________ AMPERES MAXIMUM.orWARNINGGENERATORONLY INSTALL A GENERATOR LISTED SPECIFICALLYFOR RV USE HAVING OVERCURRENTPROTECTION RATED 120-240-VOLT AC, 60 HZ, __________ AMPERES MAXIMUM.The correct ampere rating shall be legibly marked in the blank space. [551.47_(R)](https://2023.antflix.net#551.47_(R))", + "displayTitle": "(R) Prewiring for Generator Installation", + "children": [], + "url": "https://2023.antflix.net#551.47_(R)" + }, + { + "body": "Prewiring installed for the purpose of installing other appliances or devices shall comply with the applicable portions of this article and the following: An overcurrent protection device with a rating compatible with the circuit conductors shall be installed in the panelboard with wiring connections completed.The load end of the circuit shall terminate in a junction box with a blank cover or a device listed for the purpose. Where a junction box with blank cover is used, the free ends of the conductors shall be adequately capped or taped.A safety label with the signal word WARNING in minimum 6-mm (1/4-in.) high letters and body text in minimum 3-mm (1/8-in.) high letters on a contrasting background shall be affixed on or adjacent to the junction box or device listed for the purpose and shall read as follows:WARNINGTHIS CONNECTION IS FOR _________ RATED __________ VOLTAC, 60 HZ, ______ AMPERES MAXIMUM. DO NOTEXCEED CIRCUIT RATING.EXCEEDING THE CIRCUIT RATING MAYCAUSE A FIRE AND RESULT IN DEATH ORSERIOUS INJURY.An ampere rating not to exceed 80 percent of the circuit rating shall be legibly marked in the blank space. [551.47_(S)](https://2023.antflix.net#551.47_(S))", + "displayTitle": "(S) Prewiring for Other Circuits", + "children": [], + "url": "https://2023.antflix.net#551.47_(S)" + } + ], + "url": "https://2023.antflix.net#551.47" + }, + { + "body": "The maximum number of conductors permitted in boxes shall be in accordance with 314.16. [551.48](https://2023.antflix.net#551.48)", + "displayTitle": "551.48 Conductors and Boxes", + "children": [], + "url": "https://2023.antflix.net#551.48" + }, + { + "body": "The identification of grounded conductors shall be in accordance with 200.6. [551.49](https://2023.antflix.net#551.49)", + "displayTitle": "551.49 Grounded Conductors", + "children": [], + "url": "https://2023.antflix.net#551.49" + }, + { + "body": "Conductor splices and connections at terminals shall be in accordance with 110.14. [551.50](https://2023.antflix.net#551.50)", + "displayTitle": "551.50 Connection of Terminals and Splices", + "children": [], + "url": "https://2023.antflix.net#551.50" + }, + { + "displayTitle": "551.51 Switches", + "children": [ + { + "body": "Switches shall be rated in accordance with 551.51(A)(1) and (A)(2). [551.51_(A)](https://2023.antflix.net#551.51_(A))", + "displayTitle": "(A) Rating", + "children": [ + { + "body": "For lighting circuits, switches shall be rated not less than 10 amperes, 120\u2014125 volts and in no case less than the connected load. [551.51_(A)_(1)](https://2023.antflix.net#551.51_(A)_(1))", + "displayTitle": "(1) Lighting Circuits", + "children": [], + "url": "https://2023.antflix.net#551.51_(A)_(1)" + }, + { + "body": "Switches for motors or other loads shall comply with 404.14. [551.51_(A)_(2)](https://2023.antflix.net#551.51_(A)_(2))", + "displayTitle": "(2) Motors or Other Loads", + "children": [], + "url": "https://2023.antflix.net#551.51_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#551.51_(A)" + }, + { + "body": "Switches shall not be installed within wet locations in tub or shower spaces unless installed as part of a listed tub or shower assembly. [551.51_(B)](https://2023.antflix.net#551.51_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#551.51_(B)" + } + ], + "url": "https://2023.antflix.net#551.51" + }, + { + "body": "All receptacle outlets shall be of the grounding type and installed in accordance with 406.4 and 210.21. [551.52](https://2023.antflix.net#551.52)", + "displayTitle": "551.52 Receptacles", + "children": [], + "url": "https://2023.antflix.net#551.52" + }, + { + "displayTitle": "551.53 Luminaires and Other Equipment", + "children": [ + { + "body": "Any combustible wall or ceiling finish exposed between the edge of a canopy or pan of a luminaire or ceiling-suspended (paddle) fan and the outlet box shall be covered with noncombustible material. [551.53_(A)](https://2023.antflix.net#551.53_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#551.53_(A)" + }, + { + "body": "If a luminaire is provided over a bathtub or in a shower stall, it shall be of the enclosed and gasketed type and listed for the type of installation, and it shall be ground-fault circuit-interrupter protected. [551.53_(B)](https://2023.antflix.net#551.53_(B))", + "displayTitle": "(B) Shower Luminaires", + "children": [], + "url": "https://2023.antflix.net#551.53_(B)" + }, + { + "body": "Outdoor luminaires and other equipment shall be listed for outdoor use. [551.53_(C)](https://2023.antflix.net#551.53_(C))", + "displayTitle": "(C) Outdoor Outlets, Luminaires, Air-Cooling Equipment, and So On", + "children": [], + "url": "https://2023.antflix.net#551.53_(C)" + } + ], + "url": "https://2023.antflix.net#551.53" + }, + { + "body": "(See also 551.56 on bonding of noncurrent-carrying metal parts.) [551.54](https://2023.antflix.net#551.54)", + "displayTitle": "551.54 Grounding", + "children": [ + { + "body": "The equipment grounding conductor in the supply cord or feeder shall be connected to the equipment grounding bus or other approved equipment grounding means in the panelboard. [551.54_(A)](https://2023.antflix.net#551.54_(A))", + "displayTitle": "(A) Power-Supply Grounding", + "children": [], + "url": "https://2023.antflix.net#551.54_(A)" + }, + { + "body": "The panelboard shall have an equipment grounding bus with terminals for all equipment grounding conductors or other approved equipment grounding means. [551.54_(B)](https://2023.antflix.net#551.54_(B))", + "displayTitle": "(B) Panelboard", + "children": [], + "url": "https://2023.antflix.net#551.54_(B)" + }, + { + "body": "The neutral conductor shall be insulated from the equipment grounding conductors and from equipment enclosures and other grounded parts. The neutral conductor terminals in the panelboard and in ranges, clothes dryers, counter-mounted cooking units, and wall-mounted ovens shall be insulated from the equipment enclosure. Bonding screws, straps, or buses in the panelboard or in appliances shall be removed and discarded. Connection of electric ranges and electric clothes dryers utilizing a grounded conductor, if cord-connected, shall be made with 4-conductor cord and 3-pole, 4-wire grounding-type plug caps and receptacles. [551.54_(C)](https://2023.antflix.net#551.54_(C))", + "displayTitle": "(C) Insulated Neutral Conductor", + "children": [], + "url": "https://2023.antflix.net#551.54_(C)" + } + ], + "url": "https://2023.antflix.net#551.54" + }, + { + "displayTitle": "551.55 Interior Equipment Grounding", + "children": [ + { + "body": "In the electrical system, all exposed metal parts, enclosures, frames, luminaire canopies, and so forth, shall be effectively bonded to the grounding terminals or enclosure of the panelboard. [551.55_(A)](https://2023.antflix.net#551.55_(A))", + "displayTitle": "(A) Exposed Metal Parts", + "children": [], + "url": "https://2023.antflix.net#551.55_(A)" + }, + { + "body": "Bare wires, insulated wire with an outer finish that is green or green with one or more yellow stripes, shall be used for equipment grounding or bonding conductors only. [551.55_(B)](https://2023.antflix.net#551.55_(B))", + "displayTitle": "(B) Equipment Grounding and Bonding Conductors", + "children": [], + "url": "https://2023.antflix.net#551.55_(B)" + }, + { + "body": "Grounding of electrical equipment shall be accomplished by one or more of the following methods: Connection of metal raceway, the sheath of Type MC and Type MI cable where the sheath is identified for grounding, or the armor of Type AC cable to metal enclosures.A connection between the one or more equipment grounding conductors and a metal enclosure by means of a grounding screw, which shall be used for no other purpose, or a listed grounding device.The equipment grounding conductor in nonmetallic-sheathed cable shall be permitted to be secured under a screw threaded into the luminaire canopy other than a mounting screw or cover screw, or attached to a listed grounding means (plate) in a nonmetallic outlet box for luminaire mounting. [Grounding means shall also be permitted for luminaire attachment screws.] [551.55_(C)](https://2023.antflix.net#551.55_(C))", + "displayTitle": "(C) Grounding of Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#551.55_(C)" + }, + { + "body": "A connection between the one or more equipment grounding conductors brought into a nonmetallic outlet box shall be so arranged that a connection of the equipment grounding conductor can be made to any fitting or device in that box that requires grounding. [551.55_(D)](https://2023.antflix.net#551.55_(D))", + "displayTitle": "(D) Grounding Connection in Nonmetallic Box", + "children": [], + "url": "https://2023.antflix.net#551.55_(D)" + }, + { + "body": "Where more than one equipment grounding or bonding conductor of a branch circuit enters a box, all such conductors shall be connected together using a method specified in 250.8, and the arrangement shall be such that the disconnection or removal of a receptacle, luminaire, or other device fed from the box will not interfere with or interrupt the grounding continuity. [551.55_(E)](https://2023.antflix.net#551.55_(E))", + "displayTitle": "(E) Grounding Continuity", + "children": [], + "url": "https://2023.antflix.net#551.55_(E)" + }, + { + "body": "Cord-connected appliances, such as washing machines, clothes dryers, refrigerators, and the electrical system of gas ranges, and so forth, shall be grounded by means of an approved cord with equipment grounding conductor and grounding-type attachment plug. [551.55_(F)](https://2023.antflix.net#551.55_(F))", + "displayTitle": "(F) Cord-Connected Appliances", + "children": [], + "url": "https://2023.antflix.net#551.55_(F)" + } + ], + "url": "https://2023.antflix.net#551.55" + }, + { + "displayTitle": "551.56 Bonding of Non-Current-Carrying Metal Parts", + "children": [ + { + "body": "All exposed non\u2014current-carrying metal parts that are likely to become energized shall be effectively bonded to the grounding terminal or enclosure of the panelboard. [551.56_(A)](https://2023.antflix.net#551.56_(A))", + "displayTitle": "(A) Required Bonding", + "children": [], + "url": "https://2023.antflix.net#551.56_(A)" + }, + { + "body": "A bonding conductor shall be connected between any panelboard and an accessible terminal on the chassis. Bonding terminations shall be suitable for the environment in which the conductors and terminations are installed. Exception: Any recreational vehicle that employs a unitized metal chassis-frame construction to which the panelboard is securely fastened with a bolt(s) and nut(s) or by welding or riveting shall be considered to be bonded. [551.56_(B)](https://2023.antflix.net#551.56_(B))", + "displayTitle": "(B) Bonding Chassis", + "children": [], + "url": "https://2023.antflix.net#551.56_(B)" + }, + { + "body": "Grounding terminals shall be of the solderless type and listed as pressure terminal connectors recognized for the wire size used. The bonding conductor shall be solid or stranded, insulated or bare, and shall be 8 AWG copper minimum, or equal. [551.56_(C)](https://2023.antflix.net#551.56_(C))", + "displayTitle": "(C) Bonding Conductor Requirements", + "children": [], + "url": "https://2023.antflix.net#551.56_(C)" + }, + { + "body": "The metal roof and exterior covering shall be considered bonded where both of the following conditions apply: The metal panels overlap one another and are securely attached to the wood or metal frame parts by metal fasteners.The lower panel of the metal exterior covering is secured by metal fasteners at each cross member of the chassis, or the lower panel is connected to the chassis by a metal strap. [551.56_(D)](https://2023.antflix.net#551.56_(D))", + "displayTitle": "(D) Metallic Roof and Exterior Bonding", + "children": [], + "url": "https://2023.antflix.net#551.56_(D)" + }, + { + "body": "The gas, water, and waste pipes shall be considered grounded if they are bonded to the chassis. [551.56_(E)](https://2023.antflix.net#551.56_(E))", + "displayTitle": "(E) Gas, Water, and Waste Pipe Bonding", + "children": [], + "url": "https://2023.antflix.net#551.56_(E)" + }, + { + "body": "Furnace and metal circulating air ducts shall be bonded. [551.56_(F)](https://2023.antflix.net#551.56_(F))", + "displayTitle": "(F) Furnace and Metal Air Duct Bonding", + "children": [], + "url": "https://2023.antflix.net#551.56_(F)" + } + ], + "url": "https://2023.antflix.net#551.56" + }, + { + "body": "Every appliance shall be accessible for inspection, service, repair, and replacement without removal of permanent construction. Means shall be provided to securely fasten appliances in place when the recreational vehicle is in transit. [551.57](https://2023.antflix.net#551.57)", + "displayTitle": "551.57 Appliance Accessibility and Fastening", + "children": [], + "url": "https://2023.antflix.net#551.57" + }, + { + "displayTitle": "Part V Factory Tests", + "children": [], + "url": "https://2023.antflix.net#divider_19_V" + }, + { + "body": "Each recreational vehicle designed with a 120-volt or a 120/240-volt electrical system shall withstand the applied voltage without electrical breakdown of a 1-minute, 900-volt ac or 1280-volt dc dielectric strength test, or a 1-second, 1080-volt ac or 1530-volt dc dielectric strength test, with all switches closed, between ungrounded and grounded conductors and the recreational vehicle ground. During the test, all switches and other controls shall be in the \"on\" position. Fixtures, including luminaires and permanently installed appliances, shall not be required to withstand this test. The test shall be performed after branch circuits are complete prior to energizing the system and again after all outer coverings and cabinetry have been secured. The dielectric test shall be performed in accordance with the test equipment manufacturer's written instructions. Each recreational vehicle shall be subjected to all of the following:A continuity test to ensure that all metal parts are properly bondedOperational tests to demonstrate that all equipment is properly connected and in working orderPolarity checks to determine that connections have been properly madeGFCI test to demonstrate that the ground fault protection device(s) installed on the recreational vehicle are operating properly [551.60](https://2023.antflix.net#551.60)", + "displayTitle": "551.60 Factory Tests (Electrical)", + "children": [], + "url": "https://2023.antflix.net#551.60" + }, + { + "displayTitle": "Part VI Recreational Vehicle Parks", + "children": [], + "url": "https://2023.antflix.net#divider_13_VI" + }, + { + "displayTitle": "551.71 Type Receptacles Provided", + "children": [ + { + "body": "Every recreational vehicle site with electrical supply shall be equipped with recreational vehicle site supply equipment with at least one 20-ampere, 125-volt weather-resistant receptacle. This receptacle, when used in recreational vehicle site electrical equipment, shall not be required to be tamper-resistant in accordance with 406.12. [551.71_(A)](https://2023.antflix.net#551.71_(A))", + "displayTitle": "(A) 20-Ampere", + "children": [], + "url": "https://2023.antflix.net#551.71_(A)" + }, + { + "body": "A minimum of 70 percent of all recreational vehicle sites with electrical supply shall each be equipped with a 30-ampere, 125-volt weather-resistant receptacle conforming to Figure 551.46(C)(1). This supply shall be permitted to include additional receptacle configurations conforming to 551.81. The remainder of all recreational vehicle sites with electrical supply shall be equipped with one or more of the receptacle configurations conforming to 551.81. [551.71_(B)](https://2023.antflix.net#551.71_(B))", + "displayTitle": "(B) 30-Ampere", + "children": [], + "url": "https://2023.antflix.net#551.71_(B)" + }, + { + "body": "A minimum of 20 percent of existing and 40 percent of all new recreational vehicle sites with electrical supply, shall each be equipped with a 50-ampere, 125/250-volt weather-resistant receptacle conforming to the configuration as identified in Figure 551.46(C)(1). Every recreational vehicle site equipped with a 50-ampere receptacle shall also be equipped with a 30-ampere, 125-volt receptacle conforming to Figure 551.46(C)(1). These electrical supplies shall be permitted to include additional receptacles that have configurations in accordance with 551.81. The weather-resistant requirement for 50-ampere, 125/250-volt receptacles shall become effective January 1, 2026. Informational Note: The percentage of 50 ampere sites required by 551.71 could be inadequate for seasonal recreational vehicle sites serving a higher percentage of recreational vehicles with 50-ampere electrical systems. In that type of recreational vehicle park, the percentage of 50-ampere sites could approach 100 percent. [551.71_(C)](https://2023.antflix.net#551.71_(C))", + "displayTitle": "(C) 50-Ampere", + "children": [], + "url": "https://2023.antflix.net#551.71_(C)" + }, + { + "body": "Dedicated tent sites with a 15- or 20-ampere electrical supply shall be permitted to be excluded when determining the percentage of recreational vehicle sites with 30- or 50-ampere receptacles. [551.71_(D)](https://2023.antflix.net#551.71_(D))", + "displayTitle": "(D) Tent Sites", + "children": [], + "url": "https://2023.antflix.net#551.71_(D)" + }, + { + "body": "Additional receptacles shall be permitted for the connection of electrical equipment outside the recreational vehicle within the recreational vehicle park. [551.71_(E)](https://2023.antflix.net#551.71_(E))", + "displayTitle": "(E) Additional Receptacles", + "children": [], + "url": "https://2023.antflix.net#551.71_(E)" + }, + { + "displayTitle": "(F) GFCI Protection", + "children": [ + { + "body": "Ground-fault circuit-interrupter protection shall be provided as required in 210.8(B). [551.71_(F)_(1)](https://2023.antflix.net#551.71_(F)_(1))", + "displayTitle": "(1) Receptacles Installed in Other Than Recreational Vehicle Site Equipment", + "children": [], + "url": "https://2023.antflix.net#551.71_(F)_(1)" + }, + { + "body": "Ground-fault circuit-interrupter protection shall only be required for 125-volt, single-phase, 15- and 20-ampere receptacles. Informational Note No. 1: Appliances used within the recreational vehicle can create leakage current levels at the supply receptacle(s) that could exceed the limits of a Class A GFCI device. Informational Note No. 2: The definition of Feeder Assembly clarifies that the power supply cord to a recreational vehicle is considered a feeder. [551.71_(F)_(2)](https://2023.antflix.net#551.71_(F)_(2))", + "displayTitle": "(2) Receptacles Installed in Recreational Vehicle Site Equipment", + "children": [], + "url": "https://2023.antflix.net#551.71_(F)_(2)" + } + ], + "url": "https://2023.antflix.net#551.71_(F)" + } + ], + "url": "https://2023.antflix.net#551.71" + }, + { + "displayTitle": "551.72 Distribution System", + "children": [ + { + "body": "Distribution systems shall provide the voltage and have a capacity for the receptacles provided in the recreational vehicle (RV) site supply equipment as calculated according to 551.73 and shall have an ampacity not less than 30 amperes. Systems permitted include single-phase 120 volts, single-phase 120/240 volts, or single-phase 120/208 volts - two ungrounded and one neutral conductor taken from a 208Y/120-volt system. [551.72_(A)](https://2023.antflix.net#551.72_(A))", + "displayTitle": "(A) Systems", + "children": [], + "url": "https://2023.antflix.net#551.72_(A)" + }, + { + "body": "Feeders from 208Y/120-volt, 3-phase systems shall be permitted to include two ungrounded conductors and shall include one grounded conductor and one equipment grounding conductor. So far as practicable, the loads shall be equally distributed on the 3-phase system. [551.72_(B)](https://2023.antflix.net#551.72_(B))", + "displayTitle": "(B) Three-Phase Systems", + "children": [], + "url": "https://2023.antflix.net#551.72_(B)" + }, + { + "body": "Receptacles rated at 50 amperes shall be supplied from a circuit of the voltage class and rating of the receptacle. Other recreational vehicle sites with 125-volt, 20- and 30-ampere receptacles shall be permitted to be derived from any grounded distribution system that supplies 120-volt, single-phase power. [551.72_(C)](https://2023.antflix.net#551.72_(C))", + "displayTitle": "(C) Receptacles", + "children": [], + "url": "https://2023.antflix.net#551.72_(C)" + }, + { + "body": "Neutral conductors shall be permitted to be reduced in size below the minimum required size of the ungrounded conductors for 240-volt, line-to-line, permanently connected loads only. The neutral conductors shall not be reduced in size below the size of the ungrounded conductors for the site distribution. Informational Note: Due to the long circuit lengths typical in most recreational vehicle parks, feeder conductor sizes found in the ampacity tables of Article 310 could be inadequate to maintain the voltage regulation suggested in 215.2(A), Informational Note No. 2. Total circuit voltage drop is a sum of the voltage drops of each serial circuit segment, where the load for each segment is calculated using the load that segment sees and the demand factors shown in Table 551.73(A). [551.72_(D)](https://2023.antflix.net#551.72_(D))", + "displayTitle": "(D) Neutral Conductors", + "children": [], + "url": "https://2023.antflix.net#551.72_(D)" + }, + { + "body": "The use of listed surge protective devices shall be permitted. Informational Note: Use of multiple autotransformers on the load side of RV pedestals, supplied by a single feeder, can result in increased current on the RV park or campground distribution system. [551.72_(E)](https://2023.antflix.net#551.72_(E))", + "displayTitle": "(E) Connected Devices", + "children": [], + "url": "https://2023.antflix.net#551.72_(E)" + }, + { + "body": "Each recreational vehicle shall be powered by only one 30-ampere or one 50-ampere external power supply cord. Informational Note: The requirement in 551.72(F) does not preclude the use of the 15- or 20-ampere receptacle convenience outlet on the recreational vehicle supply equipment. [551.72_(F)](https://2023.antflix.net#551.72_(F))", + "displayTitle": "(F) Connection to Recreational Vehicle Site Equipment", + "children": [], + "url": "https://2023.antflix.net#551.72_(F)" + } + ], + "url": "https://2023.antflix.net#551.72" + }, + { + "displayTitle": "551.73 Calculated Load", + "children": [ + { + "body": "Electrical services and feeders shall be calculated on the basis of not less than all of the following: 12,000 volt-amperes per site equipped with 50-ampere, 208Y/120-volt or 120/240-volt supply facilities3600 volt-amperes per site equipped with both 20-ampere and 30-ampere supply facilities2400 volt-amperes per site equipped with only 20-ampere supply facilities600 volt-amperes per site equipped with only 20-ampere supply facilities that are dedicated to tent sitesThe demand factors set forth in Table 551.73(A) shall be the minimum allowable demand factors that shall be permitted in calculating load for service and feeders. Where the electrical supply for a recreational vehicle site has more than one receptacle.Where the electrical supply is in a location that serves two recreational vehicles, the equipment for both sites shall comply with 551.77, and the calculated load shall only be calculated for the two receptacles with the highest rating. [551.73_(A)](https://2023.antflix.net#551.73_(A))", + "displayTitle": "(A) Basis of Calculations", + "children": [], + "url": "https://2023.antflix.net#551.73_(A)" + }, + { + "body": "The demand factor for a given number of sites shall apply to all sites indicated. For example, 20 sites calculated at 45 percent of 3600 volt-amperes results in a permissible demand of 1620 volt-amperes per site or a total of 32,400 volt-amperes for 20 sites. Informational Note: These demand factors may be inadequate in areas of extreme hot or cold temperature with loaded circuits for heating or air conditioning. Loads for other amenities such as, but not limited to, service buildings, recreational buildings, and swimming pools shall be calculated separately and then be added to the value calculated for the recreational vehicle sites where they are all supplied by a common service. Table 551.73(A) Demand Factors for Site Feeders and Service-Entrance Conductors for Park Sites Number of Recreational Vehicle Sites Demand Factor (%) 1 100 2 90 3 80 4 75 5 65 6 60 7\u20149 55 10\u201412 50 13\u201415 48 16\u201418 47 19\u201421 45 22\u201424 43 25\u201435 42 36 plus 41 [551.73_(B)](https://2023.antflix.net#551.73_(B))", + "displayTitle": "(B) Demand Factors", + "children": [], + "url": "https://2023.antflix.net#551.73_(B)" + } + ], + "url": "https://2023.antflix.net#551.73" + }, + { + "body": "Overcurrent protection shall be provided in accordance with Article 240. [551.74](https://2023.antflix.net#551.74)", + "displayTitle": "551.74 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#551.74" + }, + { + "displayTitle": "551.76 Grounding - Recreational Vehicle Site Supply Equipment", + "children": [ + { + "body": "Recreational vehicle site supply equipment, other than those used as service equipment, shall not be required to have a grounding electrode. An auxiliary grounding electrode(s) in accordance with 250.54 shall be permitted to be installed. [551.76_(A)](https://2023.antflix.net#551.76_(A))", + "displayTitle": "(A) Grounding Electrode", + "children": [], + "url": "https://2023.antflix.net#551.76_(A)" + }, + { + "body": "Exposed non\u2014current-carrying metal parts of fixed equipment, metal boxes, cabinets, and fittings that are not electrically connected to grounded equipment shall be grounded by an equipment grounding conductor run with the circuit conductors from the service equipment or from the transformer of a secondary distribution system. Equipment grounding conductors shall be sized in accordance with 250.122 and shall be permitted to be spliced by listed means. The arrangement of equipment grounding connections shall be such that the disconnection or removal of a receptacle or other device will not interfere with, or interrupt, the grounding continuity. [551.76_(B)](https://2023.antflix.net#551.76_(B))", + "displayTitle": "(B) Exposed Non\u2014Current-Carrying Metal Parts", + "children": [], + "url": "https://2023.antflix.net#551.76_(B)" + }, + { + "body": "Each secondary distribution system shall be grounded at the transformer. [551.76_(C)](https://2023.antflix.net#551.76_(C))", + "displayTitle": "(C) Secondary Distribution System", + "children": [], + "url": "https://2023.antflix.net#551.76_(C)" + }, + { + "body": "The grounded conductor shall not be used as an equipment grounding conductor for recreational vehicles or equipment within the recreational vehicle park. [551.76_(D)](https://2023.antflix.net#551.76_(D))", + "displayTitle": "(D) Grounded Conductor Not to Be Used as an Equipment Ground", + "children": [], + "url": "https://2023.antflix.net#551.76_(D)" + }, + { + "body": "No connection to a grounding electrode shall be made to the grounded conductor on the load side of the service disconnecting means except as covered in 250.30(A) for separately derived systems, and 250.32(B), Exception No. 1 for separate buildings. [551.76_(E)](https://2023.antflix.net#551.76_(E))", + "displayTitle": "(E) No Connection on the Load Side", + "children": [], + "url": "https://2023.antflix.net#551.76_(E)" + } + ], + "url": "https://2023.antflix.net#551.76" + }, + { + "body": "Recreational vehicle site supply equipment shall be listed for use as recreational vehicle site supply equipment and shall comply with 551.77(A) through (F). [551.77](https://2023.antflix.net#551.77)", + "displayTitle": "551.77 Recreational Vehicle Site Supply Equipment", + "children": [ + { + "body": "Where provided on back-in sites, the recreational vehicle site electrical supply equipment shall be located on the left (road) side of the parked vehicle, on a line that is 1.5 m to 2.1 m (5 ft to 7 ft) from the left edge (driver's side of the parked RV) of the recreational vehicle stand and shall be located at any point on this line from the rear of the recreational vehicle stand to 4.5 m (15 ft) forward of the rear of the recreational vehicle stand. For pull-through sites, the electrical supply equipment shall be permitted to be located at any point along the line that is 1.5 m to 2.1 m (5 ft to 7 ft) from the left edge (driver's side of the parked RV) from 4.9 m (16 ft) forward of the rear of the recreational vehicle stand to the center point between the two roads that gives access to and egress from the pull-through sites. The left edge (driver's side of the parked RV) of the recreational vehicle stand shall be marked. [551.77_(A)](https://2023.antflix.net#551.77_(A))", + "displayTitle": "(A) Location", + "children": [], + "url": "https://2023.antflix.net#551.77_(A)" + }, + { + "body": "A disconnecting switch or circuit breaker shall be provided in the site supply equipment for disconnecting the power supply to the recreational vehicle. [551.77_(B)](https://2023.antflix.net#551.77_(B))", + "displayTitle": "(B) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#551.77_(B)" + }, + { + "body": "All site supply equipment shall be accessible by an unobstructed entrance or passageway not less than 600 mm (2 ft) wide and 2.0 m (6 ft 6 in.) high. [551.77_(C)](https://2023.antflix.net#551.77_(C))", + "displayTitle": "(C) Access", + "children": [], + "url": "https://2023.antflix.net#551.77_(C)" + }, + { + "body": "Site supply equipment shall be located not less than 600 mm (2 ft) above the electrical datum plane for that RV site and no more than 2.0 m (6 ft 6 in.) above the electrical datum plane unless platform provisions are made to reach the circuit protection devices that are no more than 2.0 m (6 ft 6 in.) above that platform. [551.77_(D)](https://2023.antflix.net#551.77_(D))", + "displayTitle": "(D) Mounting Height", + "children": [], + "url": "https://2023.antflix.net#551.77_(D)" + }, + { + "body": "Sufficient space shall be provided and maintained about all electrical equipment to permit ready and safe operation, in accordance with 110.26. [551.77_(E)](https://2023.antflix.net#551.77_(E))", + "displayTitle": "(E) Working Space", + "children": [], + "url": "https://2023.antflix.net#551.77_(E)" + }, + { + "body": "Where the site supply equipment contains a 125/250-volt receptacle, the equipment shall be marked as follows: \"Turn disconnecting switch or circuit breaker off before inserting or removing plug. Plug must be fully inserted or removed.\" The marking shall be located on the equipment adjacent to the receptacle outlet. [551.77_(F)](https://2023.antflix.net#551.77_(F))", + "displayTitle": "(F) Marking", + "children": [], + "url": "https://2023.antflix.net#551.77_(F)" + } + ], + "url": "https://2023.antflix.net#551.77" + }, + { + "displayTitle": "551.78 Protection of Outdoor Equipment", + "children": [ + { + "body": "All switches, circuit breakers, receptacles, control equipment, and metering devices located in wet locations shall be weatherproof. [551.78_(A)](https://2023.antflix.net#551.78_(A))", + "displayTitle": "(A) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#551.78_(A)" + }, + { + "body": "If secondary meters are installed, meter sockets without meters installed shall be blanked off with an approved blanking plate. [551.78_(B)](https://2023.antflix.net#551.78_(B))", + "displayTitle": "(B) Meters", + "children": [], + "url": "https://2023.antflix.net#551.78_(B)" + } + ], + "url": "https://2023.antflix.net#551.78" + }, + { + "body": "Open conductors of not over 1000 volts, nominal, shall have a vertical clearance of not less than 5.5 m (18 ft) and a horizontal clearance of not less than 900 mm (3 ft) in all areas subject to recreational vehicle movement. In all other areas, clearances shall conform to 235.360 and 235.361. Informational Note: See 235.360 and 235.361, for clearances of conductors over 600 volts, nominal. [551.79](https://2023.antflix.net#551.79)", + "displayTitle": "551.79 Clearance for Overhead Conductors", + "children": [], + "url": "https://2023.antflix.net#551.79" + }, + { + "displayTitle": "551.80 Underground Service, Feeder, Branch-Circuit, and Recreational Vehicle Site Feeder-Circuit Conductors", + "children": [ + { + "body": "All direct-burial conductors, including the equipment grounding conductor if of aluminum, shall be insulated and identified for the use. All conductors shall be continuous from equipment to equipment. All splices and taps shall be made in approved junction boxes or by use of listed material. [551.80_(A)](https://2023.antflix.net#551.80_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#551.80_(A)" + }, + { + "body": "Direct-buried conductors and cables entering or leaving a trench shall be protected by rigid metal conduit, intermediate metal conduit, electrical metallic tubing with supplementary corrosion protection, rigid polyvinyl chloride conduit (PVC), nonmetallic underground conduit with conductors (NUCC), high density polyethylene conduit (HDPE), reinforced thermosetting resin conduit (RTRC), liquidtight flexible nonmetallic conduit, liquidtight flexible metal conduit, or other approved raceways or enclosures. Where subject to physical damage, the conductors or cables shall be protected by rigid metal conduit, intermediate metal conduit, Schedule 80 PVC conduit, or RTRC listed for exposure to physical damage. All such protection shall extend at least 450 mm (18 in.) into the trench from finished grade. Informational Note: See 300.5 and Article 340 for conductors or Type UF cable used underground or in direct burial in earth. [551.80_(B)](https://2023.antflix.net#551.80_(B))", + "displayTitle": "(B) Protection Against Physical Damage", + "children": [], + "url": "https://2023.antflix.net#551.80_(B)" + } + ], + "url": "https://2023.antflix.net#551.80" + }, + { + "body": "A receptacle to supply electric power to a recreational vehicle shall be one of the configurations shown in Figure 551.46(C)(1) in the following ratings: 50-ampere - 125/250-volt, 50-ampere, 3-pole, 4-wire grounding type for 120/240-volt systems30-ampere - 125-volt, 30-ampere, 2-pole, 3-wire grounding type for 120-volt systems20-ampere - 125-volt, 20-ampere, 2-pole, 3-wire grounding type for 120-volt systemsInformational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figures 14-50, TT, and 5-20, for complete details of these configurations. [551.81](https://2023.antflix.net#551.81)", + "displayTitle": "551.81 Receptacles", + "children": [], + "url": "https://2023.antflix.net#551.81" + } + ], + "url": "https://2023.antflix.net#551" + }, + { + "displayTitle": "Article 552 Park Trailers", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_88_I" + }, + { + "body": "The provisions of this article cover the electrical conductors and equipment installed within or on park trailers not covered fully under Articles 550 and 551. [552.1](https://2023.antflix.net#552.1)", + "displayTitle": "552.1 Scope", + "children": [], + "url": "https://2023.antflix.net#552.1" + }, + { + "body": "A park trailer is intended for seasonal use. It is not intended as a permanent dwelling unit or for commercial uses such as banks, clinics, offices, or similar. Units designed for such purposes are classified as relocatable structures and are covered in Part II of Article 545. [552.4](https://2023.antflix.net#552.4)", + "displayTitle": "552.4 General Requirements", + "children": [], + "url": "https://2023.antflix.net#552.4" + }, + { + "body": "Labels required by Article 552 shall be made of etched, metal-stamped, or embossed brass or stainless steel; plastic laminates not less than 0.13 mm (0.005 in.) thick; or anodized or alclad aluminum not less than 0.5 mm (0.020 in.) thick or the equivalent. Informational Note: See ANSI Z535.4-2011, Product Safety Signs and Labels, for guidance on other label criteria used in the park trailer industry. [552.5](https://2023.antflix.net#552.5)", + "displayTitle": "552.5 Labels", + "children": [], + "url": "https://2023.antflix.net#552.5" + }, + { + "displayTitle": "Part II Low-Voltage Systems", + "children": [], + "url": "https://2023.antflix.net#divider_88_II" + }, + { + "displayTitle": "552.10 Low-Voltage Systems", + "children": [ + { + "body": "Low-voltage circuits furnished and installed by the park trailer manufacturer, other than those related to braking, shall be subject to this Code. Circuits supplying lights subject to federal or state regulations shall comply with applicable government regulations and this Code. [552.10_(A)](https://2023.antflix.net#552.10_(A))", + "displayTitle": "(A) Low-Voltage Circuits", + "children": [], + "url": "https://2023.antflix.net#552.10_(A)" + }, + { + "displayTitle": "(B) Low-Voltage Wiring", + "children": [ + { + "body": "Copper conductors shall be used for low-voltage circuits. Exception: A metal chassis or frame shall be permitted as the return path to the source of supply. [552.10_(B)_(1)](https://2023.antflix.net#552.10_(B)_(1))", + "displayTitle": "(1) Material", + "children": [], + "url": "https://2023.antflix.net#552.10_(B)_(1)" + }, + { + "body": "Conductors shall conform to the requirements for Type GXL, HOT, SGT, SGR, or Type SXL or shall have insulation in accordance with Table 310.4(1) or the equivalent. Conductor sizes 6 AWG through 18 AWG or SAE shall be listed. Single-wire, low-voltage conductors shall be of the stranded ty pe. Informational Note: See SAE J1128-2015, Low Voltage Primary Cable, for Types GXL, HOT, and SXL, and SAE J1127-2015, Low Voltage Battery Cable, for Types SGT and SGR. [552.10_(B)_(2)](https://2023.antflix.net#552.10_(B)_(2))", + "displayTitle": "(2) Conductor Types", + "children": [], + "url": "https://2023.antflix.net#552.10_(B)_(2)" + }, + { + "body": "All insulated low-voltage conductors shall be surface marked at intervals not greater than 1.2 m (4 ft) as follows: Listed conductors shall be marked as required by the listing agency.SAE conductors shall be marked with the name or logo of the manufacturer, specification designation, and wire gauge.Other conductors shall be marked with the name or logo of the manufacturer, temperature rating, wire gauge, conductor material, and insulation thickness. [552.10_(B)_(3)](https://2023.antflix.net#552.10_(B)_(3))", + "displayTitle": "(3) Marking", + "children": [], + "url": "https://2023.antflix.net#552.10_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#552.10_(B)" + }, + { + "displayTitle": "(C) Low-Voltage Wiring Methods", + "children": [ + { + "body": "Conductors shall be protected against physical damage and shall be secured. Where insulated conductors are clamped to the structure, the conductor insulation shall be supplemented by an additional wrap or layer of equivalent material, except that jacketed cables shall not be required to be so protected. Wiring shall be routed away from sharp edges, moving parts, or heat sources. [552.10_(C)_(1)](https://2023.antflix.net#552.10_(C)_(1))", + "displayTitle": "(1) Physical Protection", + "children": [], + "url": "https://2023.antflix.net#552.10_(C)_(1)" + }, + { + "body": "Conductors shall be spliced or joined with splicing devices that provide a secure connection or by brazing, welding, or soldering with a fusible metal or alloy. Soldered splices shall first be spliced or joined to be mechanically and electrically secure without solder, and then soldered. All splices, joints, and free ends of conductors shall be covered with an insulation equivalent to that on the conductors. [552.10_(C)_(2)](https://2023.antflix.net#552.10_(C)_(2))", + "displayTitle": "(2) Splices", + "children": [], + "url": "https://2023.antflix.net#552.10_(C)_(2)" + }, + { + "body": "Battery and other low-voltage circuits shall be physically separated by at least a 13-mm (1/2-in.) gap or other approved means from circuits of a different power source. Acceptable methods shall be by clamping, routing, or equivalent means that ensure permanent total separation. Where circuits of different power sources cross, the external jacket of the nonmetallic-sheathed cables shall be deemed adequate separation. [552.10_(C)_(3)](https://2023.antflix.net#552.10_(C)_(3))", + "displayTitle": "(3) Separation", + "children": [], + "url": "https://2023.antflix.net#552.10_(C)_(3)" + }, + { + "body": "Ground connections to the chassis or frame shall be made in an accessible location and shall be mechanically secure. Ground connections shall be by means of copper conductors and copper or copper-alloy terminals of the solderless type identified for the size of wire used. The surface on which ground terminals make contact shall be cleaned and be free from oxide or paint or shall be electrically connected through the use of a cadmium, tin, or zinc-plated internal/external-toothed lockwasher or locking terminals. Ground terminal attaching screws, rivets or bolts, nuts, and lockwashers shall be cadmium, tin, or zinc-plated except rivets shall be permitted to be unanodized aluminum where attaching to aluminum structures. The chassis-grounding terminal of the battery shall be connected to the unit chassis with a minimum 8 AWG copper conductor. In the event the unbonded lead from the battery exceeds 8 AWG, the bonding conductor size shall be not less than that of the unbonded lead. [552.10_(C)_(4)](https://2023.antflix.net#552.10_(C)_(4))", + "displayTitle": "(4) Ground Connections", + "children": [], + "url": "https://2023.antflix.net#552.10_(C)_(4)" + } + ], + "url": "https://2023.antflix.net#552.10_(C)" + }, + { + "body": "Storage batteries subject to this Code shall be securely attached to the unit and installed in an area vaportight to the interior and ventilated directly to the exterior of the unit. Where batteries are installed in a compartment, the compartment shall be ventilated with openings having a minimum area of 1100 mm2 (1.7 in.2) at both the top and at the bottom. Where compartment doors are equipped for ventilation, the openings shall be within 50 mm (2 in.) of the top and bottom. Batteries shall not be installed in a compartment containing spark- or flame-producing equipment. [552.10_(D)](https://2023.antflix.net#552.10_(D))", + "displayTitle": "(D) Battery Installations", + "children": [], + "url": "https://2023.antflix.net#552.10_(D)" + }, + { + "displayTitle": "(E) Overcurrent Protection", + "children": [ + { + "body": "Low-voltage circuit wiring shall be protected by overcurrent protective devices rated not in excess of the ampacity of copper conductors, in accordance with Table 552.10(E)(1). [552.10_(E)_(1)](https://2023.antflix.net#552.10_(E)_(1))", + "displayTitle": "(1) Rating", + "children": [], + "url": "https://2023.antflix.net#552.10_(E)_(1)" + }, + { + "body": "Circuit breakers or fuses shall be of an approved type, including automotive types. Fuseholders shall be clearly-marked with maximum fuse size and shall be protected against shorting and physical damage by a cover or equivalent means. Informational Note: See ANSI/SAE J554-1987, Standard for Electric Fuses (Cartridge Type); SAE J1284-1988, Standard for Blade Type Electric Fuses; and UL 275-2005, Standard for Automotive Glass Tube Fuses, for further information. [552.10_(E)_(2)](https://2023.antflix.net#552.10_(E)_(2))", + "displayTitle": "(2) Type", + "children": [], + "url": "https://2023.antflix.net#552.10_(E)_(2)" + }, + { + "body": "Appliances such as pumps, compressors, heater blowers, and similar motor-driven appliances shall be installed in accordance with the manufacturer's instructions. Motors that are controlled by automatic switching or by latching-type manual switches shall be protected in accordance with 430.32(B). [552.10_(E)_(3)](https://2023.antflix.net#552.10_(E)_(3))", + "displayTitle": "(3) Appliances", + "children": [], + "url": "https://2023.antflix.net#552.10_(E)_(3)" + }, + { + "body": "The overcurrent protective device shall be installed in an accessible location on the unit within 450 mm (18 in.) of the point where the power supply connects to the unit circuits. If located outside the park trailer, the device shall be protected against weather and physical damage. Exception: External low-voltage supply shall be permitted to have the overcurrent protective device within 450 mm (18 in.) after entering the unit or after leaving a metal raceway. [552.10_(E)_(4)](https://2023.antflix.net#552.10_(E)_(4))", + "displayTitle": "(4) Location", + "children": [], + "url": "https://2023.antflix.net#552.10_(E)_(4)" + } + ], + "url": "https://2023.antflix.net#552.10_(E)" + }, + { + "body": "Switches shall have a dc rating not less than the connected load. [552.10_(F)](https://2023.antflix.net#552.10_(F))", + "displayTitle": "(F) Switches", + "children": [], + "url": "https://2023.antflix.net#552.10_(F)" + }, + { + "body": "All low-voltage interior luminaires rated more than 4 watts, employing lamps rated more than 1.2 watts, shall be listed. Table 552.10(E)(1) Low-Voltage Overcurrent Protection Wire Size (AWG) Ampacity Wire Type 18 6 Stranded only 16 8 Stranded only 14 15 Stranded or solid 12 20 Stranded or solid 10 30 Stranded or solid [552.10_(G)](https://2023.antflix.net#552.10_(G))", + "displayTitle": "(G) Luminaires", + "children": [], + "url": "https://2023.antflix.net#552.10_(G)" + } + ], + "url": "https://2023.antflix.net#552.10" + }, + { + "displayTitle": "Part III Combination Electrical Systems", + "children": [], + "url": "https://2023.antflix.net#divider_78_III" + }, + { + "displayTitle": "552.20 Combination Electrical Systems", + "children": [ + { + "body": "Unit wiring suitable for connection to a battery or other low-voltage supply source shall be permitted to be connected to a 120-volt source, provided that the entire wiring system and equipment are rated and installed in full conformity with Parts I, III, IV, and V requirements of this article covering 120-volt electrical systems. Circuits fed from ac transformers shall not supply dc appliances. [552.20_(A)](https://2023.antflix.net#552.20_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#552.20_(A)" + }, + { + "body": "The 120-volt ac side of the voltage converter shall be wired in full conformity with the requirements of Parts I and IV of this article for 120-volt electrical systems. Exception: Converters supplied as an integral part of a listed appliance shall not be subject to 552.20(B). All converters and transformers shall be listed for use in recreation units and designed or equipped to provide overtemperature protection. To determine the converter rating, the following percentages shall be applied to the total connected load, including average battery-charging rate, of all 12-volt equipment: The first 20 amperes of load at 100 percent plus The second 20 amperes of load at 50 percent plus All load above 40 amperes at 25 percent Exception: A low-voltage appliance that is controlled by a momentary switch (normally open) that has no means for holding in the closed position shall not be considered as a connected load when determining the required converter rating. Momentarily energized appliances shall be limited to those used to prepare the unit for occupancy or travel. [552.20_(B)](https://2023.antflix.net#552.20_(B))", + "displayTitle": "(B) Voltage Converters (120-Volt Alternating Current to Low-Voltage Direct Current)", + "children": [], + "url": "https://2023.antflix.net#552.20_(B)" + }, + { + "body": "The non\u2014current-carrying metal enclosure of the voltage converter shall be connected to the frame of the unit with an 8 AWG copper conductor minimum. The equipment grounding conductor for the battery and the metal enclosure shall be permitted to be the same conductor. [552.20_(C)](https://2023.antflix.net#552.20_(C))", + "displayTitle": "(C) Bonding Voltage Converter Enclosures", + "children": [], + "url": "https://2023.antflix.net#552.20_(C)" + }, + { + "body": "Fixtures, including luminaires, or appliances having both 120-volt and low-voltage connections shall be listed for dual voltage. [552.20_(D)](https://2023.antflix.net#552.20_(D))", + "displayTitle": "(D) Dual-Voltage Fixtures Including Luminaires or Appliances", + "children": [], + "url": "https://2023.antflix.net#552.20_(D)" + }, + { + "body": "Autotransformers shall not be used. [552.20_(E)](https://2023.antflix.net#552.20_(E))", + "displayTitle": "(E) Autotransformers", + "children": [], + "url": "https://2023.antflix.net#552.20_(E)" + }, + { + "body": "Where a park trailer is equipped with a 120-volt or 120/240-volt ac system, a low-voltage system, or both, receptacles and plug caps of the low-voltage system shall differ in configuration from those of the 120-volt or 120/240-volt system. Where a unit equipped with a battery or dc system has an external connection for low-voltage power, the connector shall have a configuration that will not accept 120-volt power. [552.20_(F)](https://2023.antflix.net#552.20_(F))", + "displayTitle": "(F) Receptacles and Plug Caps", + "children": [], + "url": "https://2023.antflix.net#552.20_(F)" + } + ], + "url": "https://2023.antflix.net#552.20" + }, + { + "displayTitle": "Part IV Nominal 120-Volt or 120/240-Volt Systems", + "children": [], + "url": "https://2023.antflix.net#divider_26_IV" + }, + { + "displayTitle": "552.40 120-Volt or 120/240-Volt, Nominal, Systems", + "children": [ + { + "body": "The electrical equipment and material of park trailers indicated for connection to a wiring system rated 120 volts, nominal, 2-wire with an equipment grounding conductor, or a wiring system rated 120/240 volts, nominal, 3-wire with an equipment grounding conductor, shall be listed and installed in accordance with Parts I, III, IV, and V of this article. [552.40_(A)](https://2023.antflix.net#552.40_(A))", + "displayTitle": "(A) General Requirements", + "children": [], + "url": "https://2023.antflix.net#552.40_(A)" + }, + { + "body": "Electrical materials, devices, appliances, fittings, and other equipment installed, intended for use in, or attached to the park trailer shall be listed. All products shall be used only in the manner in which they have been tested and found suitable for the intended use. [552.40_(B)](https://2023.antflix.net#552.40_(B))", + "displayTitle": "(B) Materials and Equipment", + "children": [], + "url": "https://2023.antflix.net#552.40_(B)" + } + ], + "url": "https://2023.antflix.net#552.40" + }, + { + "displayTitle": "552.41 Receptacle Outlets Required", + "children": [ + { + "body": "Receptacle outlets shall be installed at wall spaces 600 mm (2 ft) wide or more so that no point along the floor line is more than 1.8 m (6 ft), measured horizontally, from an outlet in that space. Exception No. 1: Bath and hallway areas shall not be required to comply with 552.41(A). Exception No. 2: Wall spaces occupied by kitchen cabinets, wardrobe cabinets, built-in furniture; behind doors that could open fully against a wall surface; or similar facilities. [552.41_(A)](https://2023.antflix.net#552.41_(A))", + "displayTitle": "(A) Spacing", + "children": [], + "url": "https://2023.antflix.net#552.41_(A)" + }, + { + "body": "Receptacle outlets shall be installed as follows: Adjacent to countertops in the kitchen [at least one on each side of the sink if countertops are on each side and are 300 mm (12 in.) or over in width and depth]Adjacent to the refrigerator and gas range space, except where a gas-fired refrigerator or cooking appliance, requiring no external electrical connection, is factory-installedAdjacent to countertop spaces of 300 mm (12 in.) or more in width and depth that cannot be reached from a receptacle required in 552.41(B)(1) by a cord of 1.8 m (6 ft) without crossing a traffic area, cooking appliance, or sink [552.41_(B)](https://2023.antflix.net#552.41_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#552.41_(B)" + }, + { + "body": "Each 125-volt, single-phase, 15- or 20-ampere receptacle shall have ground-fault circuit-interrupter protection for personnel in the following locations: Where the receptacles are installed to serve kitchen countertop surfacesWithin 1.8 m (6 ft) of any lavatory or sinkException: Receptacles installed for appliances in dedicated spaces, such as for dishwashers, disposals, refrigerators, freezers, and laundry equipment.In the area occupied by a toilet, shower, tub, or any combination thereofOn the exterior of the unitException: Receptacles that are located inside of an access panel that is installed on the exterior of the unit to supply power for an installed appliance shall not be required to have ground-fault circuit-interrupter protection.The receptacle outlet shall be permitted in a listed luminaire. A receptacle outlet shall not be installed in a tub or combination tub-shower compartment. [552.41_(C)](https://2023.antflix.net#552.41_(C))", + "displayTitle": "(C) Ground-Fault Circuit-Interrupter Protection", + "children": [], + "url": "https://2023.antflix.net#552.41_(C)" + }, + { + "body": "Where a pipe heating cable outlet is installed, the outlet shall be as follows: Located within 600 mm (2 ft) of the cold water inletConnected to an interior branch circuit, other than a small-appliance branch circuitOn a circuit where all of the outlets are on the load side of the ground-fault circuit-interrupter protection for personnelMounted on the underside of the park trailer and shall not be considered to be the outdoor receptacle outlet required in 552.41 (E) [552.41_(D)](https://2023.antflix.net#552.41_(D))", + "displayTitle": "(D) Pipe Heating Cable Outlet", + "children": [], + "url": "https://2023.antflix.net#552.41_(D)" + }, + { + "body": "At least one receptacle outlet shall be installed outdoors. A receptacle outlet located in a compartment accessible from the outside of the park trailer shall be considered an outdoor receptacle. Outdoor receptacle outlets shall be protected as required in 552.41 (C)(4). [552.41_(E)](https://2023.antflix.net#552.41_(E))", + "displayTitle": "(E) Outdoor Receptacle Outlets", + "children": [], + "url": "https://2023.antflix.net#552.41_(E)" + }, + { + "displayTitle": "(F) Receptacle Outlets Not Permitted", + "children": [ + { + "body": "Receptacle outlets shall not be installed in or within reach [750 mm (30 in.)] of a shower or bathtub space. [552.41_(F)_(1)](https://2023.antflix.net#552.41_(F)_(1))", + "displayTitle": "(1) Shower or Bathtub Space", + "children": [], + "url": "https://2023.antflix.net#552.41_(F)_(1)" + }, + { + "body": "A receptacle shall not be installed in a face-up position in any countertop or other similar horizontal surface. [552.41_(F)_(2)](https://2023.antflix.net#552.41_(F)_(2))", + "displayTitle": "(2) Face-Up Position", + "children": [], + "url": "https://2023.antflix.net#552.41_(F)_(2)" + } + ], + "url": "https://2023.antflix.net#552.41_(F)" + } + ], + "url": "https://2023.antflix.net#552.41" + }, + { + "displayTitle": "552.42 Branch-Circuit Protection", + "children": [ + { + "body": "The branch-circuit overcurrent devices shall be rated as follows: Not more than the circuit conductorsNot more than 150 percent of the rating of a single appliance rated 13.3 amperes or more and supplied by an individual branch circuitNot more than the overcurrent protection size marked on an air conditioner or other motor-operated appliances. [552.42_(A)](https://2023.antflix.net#552.42_(A))", + "displayTitle": "(A) Rating", + "children": [], + "url": "https://2023.antflix.net#552.42_(A)" + }, + { + "body": "A 20-ampere fuse or circuit breaker shall be permitted for protection for fixtures, including luminaires, leads, cords, or small appliances, and 14 AWG tap conductors, not over 1.8 m (6 ft) long for recessed luminaires. [552.42_(B)](https://2023.antflix.net#552.42_(B))", + "displayTitle": "(B) Protection for Smaller Conductors", + "children": [], + "url": "https://2023.antflix.net#552.42_(B)" + }, + { + "body": "If more than one receptacle or load is on a branch circuit, 15-ampere receptacles shall be permitted to be protected by a 20-ampere fuse or circuit breaker. [552.42_(C)](https://2023.antflix.net#552.42_(C))", + "displayTitle": "(C) Fifteen-Ampere Receptacle Considered Protected by 20 Amperes", + "children": [], + "url": "https://2023.antflix.net#552.42_(C)" + } + ], + "url": "https://2023.antflix.net#552.42" + }, + { + "displayTitle": "552.43 Power Supply", + "children": [ + { + "body": "The power supply to the park trailer shall be a feeder assembly consisting of not more than one listed 30-ampere or 50-ampere park trailer power-supply cord, with an integrally molded or securely attached cap, or a permanently installed feeder. [552.43_(A)](https://2023.antflix.net#552.43_(A))", + "displayTitle": "(A) Feeder", + "children": [], + "url": "https://2023.antflix.net#552.43_(A)" + }, + { + "body": "If the park trailer has a power-supply cord, it shall be permanently attached to the panelboard, or to a junction box permanently connected to the panelboard, with the free end terminating in a molded-on attachment plug cap. Cords with adapters and pigtail ends, extension cords, and similar items shall not be attached to, or shipped with, a park trailer. A suitable clamp or the equivalent shall be provided at the panelboard knockout to afford strain relief for the cord to prevent strain from being transmitted to the terminals when the power-supply cord is handled in its intended manner. The cord shall be a listed type with 3-wire, 120-volt or 4-wire, 120/240-volt conductors, one of which shall be identified by a continuous green color or a continuous green color with one or more yellow stripes for use as the equipment grounding conductor. [552.43_(B)](https://2023.antflix.net#552.43_(B))", + "displayTitle": "(B) Power-Supply Cord", + "children": [], + "url": "https://2023.antflix.net#552.43_(B)" + }, + { + "body": "Where the calculated load exceeds 50 amperes or where a permanent feeder is used, the supply shall be by means of one of the following: One mast weatherhead installation, installed in accordance with Article 230, containing four continuous, insulated, color-coded feeder conductors, one of which shall be an equipment grounding conductorA rigid metal conduit, intermediate metal conduit, rigid polyvinyl chloride conduit, or other raceways identified for the location from the disconnecting means in the park trailer to the underside of the park trailer [552.43_(C)](https://2023.antflix.net#552.43_(C))", + "displayTitle": "(C) Mast Weatherhead or Raceway", + "children": [], + "url": "https://2023.antflix.net#552.43_(C)" + } + ], + "url": "https://2023.antflix.net#552.43" + }, + { + "displayTitle": "552.44 Cord", + "children": [ + { + "body": "Each feeder assembly shall be factory supplied or factory installed and connected directly to the terminals of the panelboard or conductors within a junction box and provided with means to prevent strain from being transmitted to the terminals. The ampacity of the conductors between each junction box and the terminals of each panelboard shall be at least equal to the ampacity of the feeder cord. The supply end of the assembly shall be equipped with an attachment plug of the type described in 552.44(C). Where the cord passes through the walls or floors, it shall be protected by means of conduit and bushings or equivalent. The cord assembly shall have permanent provisions for protection against corrosion and mechanical damage while the unit is in transit. [552.44_(A)](https://2023.antflix.net#552.44_(A))", + "displayTitle": "(A) Permanently Connected", + "children": [], + "url": "https://2023.antflix.net#552.44_(A)" + }, + { + "body": "The cord-exposed usable length shall be measured from the point of entrance to the park trailer or the face of the flanged surface inlet (motor-base attachment plug) to the face of the attachment plug at the supply end. The cord-exposed usable length, measured to the point of entry on the unit exterior, shall be a minimum of 7.0 m (23 ft) where the point of entrance is at the side of the unit, or shall be a minimum 8.5 m (28 ft) where the point of entrance is at the rear of the unit. The maximum length shall not exceed 11 m (361/2 ft). Where the cord entrance into the unit is more than 900 mm (3 ft) above the ground, the minimum cord lengths above shall be increased by the vertical distance of the cord entrance heights above 900 mm (3 ft). [552.44_(B)](https://2023.antflix.net#552.44_(B))", + "displayTitle": "(B) Cord Length", + "children": [], + "url": "https://2023.antflix.net#552.44_(B)" + }, + { + "displayTitle": "(C) Attachment Plugs", + "children": [ + { + "body": "Park trailers wired in accordance with 552.46(A) shall have an attachment plug that shall be 2-pole, 3-wire grounding type, rated 30 amperes, 125 volts, conforming to the configuration shown in Figure 552.44(C)(1) intended for use with units rated at 30 amperes, 125 volts. Informational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figure TT, for complete details of this configuration. [552.44_(C)_(1)](https://2023.antflix.net#552.44_(C)_(1))", + "displayTitle": "(1) Units With Two to Five 15- or 20-Ampere Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#552.44_(C)_(1)" + }, + { + "body": "Park trailers having a feeder assembly rated 50 amperes as permitted by 552.43(B) shall have a 3-pole, 4-wire grounding-type attachment plug rated 50 amperes, 125/250 volts, conforming to the configuration shown in Figure 552.44(C)(1). Informational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figure 14-50, for complete details of this configuration. [552.44_(C)_(2)](https://2023.antflix.net#552.44_(C)_(2))", + "displayTitle": "(2) Units With 50-Ampere Feeder Assembly", + "children": [], + "url": "https://2023.antflix.net#552.44_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#552.44_(C)" + }, + { + "body": "Each park trailer shall have a safety label with the signal word WARNING in minimum 6 mm (1/4 in.) high letters and body text in minimum 3 mm (1/8 in.) high letters on a contrasting background. The safety label shall be affixed to the exterior skin, at or near the point of entrance of the feeder assembly and shall read, as appropriate: WARNING:THIS CONNECTION IS FOR 110\u2014125-VOLT AC, 60 HZ, 30-AMPERE SUPPLY or WARNING:THIS CONNECTION IS FOR 208Y/120-VOLT OR 120/240-VOLT AC, 3-POLE, 4-WIRE, 60 HZ, _______ AMPERE SUPPLY. followed by DO NOT EXCEED THE CIRCUIT RATING. EXCEEDINGTHE CIRCUIT RATING CAN CAUSE A FIRE AND RESULTIN DEATH OR SERIOUS INJURY. The correct ampere rating shall be marked in the blank space and the label shall meet the requirements in 110.21(B). [552.44_(D)](https://2023.antflix.net#552.44_(D))", + "displayTitle": "(D) Labeling at Electrical Entrance", + "children": [], + "url": "https://2023.antflix.net#552.44_(D)" + }, + { + "body": "The point of entrance of a feeder assembly shall be located on either side or the rear, within 450 mm (18 in.), of an outside wall. FIGURE 552.44(C)(1) Attachment Cap and Receptacle Configurations. [552.44_(E)](https://2023.antflix.net#552.44_(E))", + "displayTitle": "(E) Location", + "children": [], + "url": "https://2023.antflix.net#552.44_(E)" + } + ], + "url": "https://2023.antflix.net#552.44" + }, + { + "displayTitle": "552.45 Panelboard", + "children": [ + { + "body": "A listed and appropriately rated panelboard shall be used. The grounded conductor termination bar shall be insulated from the enclosure as provided in 552.55(C). An equipment grounding terminal bar shall be attached inside the metal enclosure of the panelboard. [552.45_(A)](https://2023.antflix.net#552.45_(A))", + "displayTitle": "(A) Listed and Appropriately Rated", + "children": [], + "url": "https://2023.antflix.net#552.45_(A)" + }, + { + "body": "The panelboard shall be installed in a readily accessible location. Working clearance for the panelboard shall be not less than 600 mm (24 in.) wide and 750 mm (30 in.) deep. Exception: Where the panelboard cover is exposed to the inside aisle space, one of the working clearance dimensions shall be permitted to be reduced to a minimum of 550 mm (22 in.). A panelboard shall be considered exposed where the panelboard cover is within 50 mm (2 in.) of the aisle's finished surface or not more than 25 mm (1 in.) from the backside of doors that enclose the space. [552.45_(B)](https://2023.antflix.net#552.45_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#552.45_(B)" + }, + { + "body": "The panelboard shall be of the dead-front type. A main disconnecting means shall be provided where fuses are used or where more than two circuit breakers are employed. A main overcurrent protective device not exceeding the feeder assembly rating shall be provided where more than two branch circuits are employed. [552.45_(C)](https://2023.antflix.net#552.45_(C))", + "displayTitle": "(C) Dead-Front Type", + "children": [], + "url": "https://2023.antflix.net#552.45_(C)" + } + ], + "url": "https://2023.antflix.net#552.45" + }, + { + "body": "Branch circuits shall be determined in accordance with 552.46(A) and (B). [552.46](https://2023.antflix.net#552.46)", + "displayTitle": "552.46 Branch Circuits", + "children": [ + { + "body": "A maximum of five 15- or 20-ampere circuits to supply lights, receptacle outlets, and fixed appliances shall be permitted. Such park trailers shall be permitted to be equipped with panelboards rated at 120 volts maximum or 120/240 volts maximum and listed for a 30-ampere-rated feeder assembly. Not more than two 120-volt thermostatically controlled appliances shall be installed in such systems unless appliance isolation switching, energy management systems, or similar methods are used. Exception No. 1: Additional 15- or 20-ampere circuits shall be permitted where a listed energy management system rated at 30 amperes maximum is employed within the system. Exception No. 2: Six 15- or 20-ampere circuits shall be permitted without employing an energy management system, provided that the added sixth circuit serves only the power converter, and the combined load of all six circuits does not exceed the allowable load that was designed for use by the original five circuits. Informational Note: See 210.23(B) for permissible loads. See 552.45(C) for main disconnect and overcurrent protection requirements. [552.46_(A)](https://2023.antflix.net#552.46_(A))", + "displayTitle": "(A) Two to Five 15- or 20-Ampere Circuits", + "children": [], + "url": "https://2023.antflix.net#552.46_(A)" + }, + { + "body": "Where more than five circuits are needed, they shall be determined in accordance with 552.46(B)(1), (B)(2), and (B)(3). [552.46_(B)](https://2023.antflix.net#552.46_(B))", + "displayTitle": "(B) More Than Five Circuits", + "children": [ + { + "body": "Based on 33 volt-amperes/m2 (3 VA/ft2) multiplied by the outside dimensions of the park trailer (coupler excluded) divided by 120 volts to determine the number of 15- or 20-ampere lighting area circuits, for example, [552.46(B)(1)] The lighting circuits shall be permitted to serve listed cord-connected kitchen waste disposers and to provide power for supplemental equipment and lighting on gas-fired ranges, ovens, or counter-mounted cooking units. [552.46_(B)_(1)](https://2023.antflix.net#552.46_(B)_(1))", + "displayTitle": "(1) Lighting", + "children": [], + "url": "https://2023.antflix.net#552.46_(B)_(1)" + }, + { + "body": "Small-appliance branch circuits shall be installed in accordance with 210.1 1(C)(1). [552.46_(B)_(2)](https://2023.antflix.net#552.46_(B)_(2))", + "displayTitle": "(2) Small Appliances", + "children": [], + "url": "https://2023.antflix.net#552.46_(B)_(2)" + }, + { + "body": "(including furnace, water heater, space heater, range, and central or room air conditioner, etc.) An individual branch circuit shall be permitted to supply any load for which it is rated. There shall be one or more circuits of adequate rating in accordance with 552.46(B)(3)(a) through (B)(3)(d). Informational Note No. 1: See 210.11(C)(2) for laundry branch circuit. Informational Note No. 2: See Article 440 for central air conditioning.The total rating of fixed appliances shall not exceed 50 percent of the circuit rating if lighting outlets, general-use receptacles, or both are also supplied.For fixed appliances with a motor(s) larger than 1/8 horsepower, the total calculated load shall be based on 125 percent of the largest motor plus the sum of the other loads. Where a branch circuit supplies continuous load(s) or any combination of continuous and noncontinuous loads, the branch-circuit conductor size shall be in accordance with 210.19(A).The rating of a single cord-and-plug-connected appliance supplied by other than an individual branch circuit shall not exceed 80 percent of the circuit rating.The rating of a range branch circuit shall be based on the range demand as specified for ranges in 552.47(B)(5). [552.46_(B)_(3)](https://2023.antflix.net#552.46_(B)_(3))", + "displayTitle": "(3) General Appliances", + "children": [], + "url": "https://2023.antflix.net#552.46_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#552.46_(B)" + } + ], + "url": "https://2023.antflix.net#552.46" + }, + { + "body": "The following method shall be employed in computing the supply-cord and distribution-panelboard load for each feeder assembly for each park trailer in lieu of the procedure shown in Article 220 and shall be based on a 3-wire, 208Y/120-volt or 120/240-volt supply with 120-volt loads balanced between the two phases of the 3-wire system. [552.47](https://2023.antflix.net#552.47)", + "displayTitle": "552.47 Calculations", + "children": [ + { + "body": "Lighting Volt-Amperes: Length times width of park trailer floor (outside dimensions) times 33 volt-amperes/m2 (3 VA/ft2). For example, Length \u00d7 width \u00d7 3 = lighting volt-amperes Small-Appliance Volt-Amperes: Number of circuits times 1500 volt-amperes for each 20-ampere appliance receptacle circuit (see definition of Appliance, Portable, with fine print note) including 1500 volt-amperes for laundry circuit. For example, No. of circuits \u00d7 1500 = small-appliance volt-amperes Total: Lighting volt-amperes plus small-appliance voltamperes = total volt-amperes First 3000 total volt-amperes at 100 percent plus remainder at 35 percent = volt-amperes to be divided by 240 volts to obtain current (amperes) per leg. [552.47_(A)](https://2023.antflix.net#552.47_(A))", + "displayTitle": "(A) Lighting and Small-Appliance Load", + "children": [], + "url": "https://2023.antflix.net#552.47_(A)" + }, + { + "body": "Total load for determining power supply is the sum of the following: Lighting and small-appliance load as calculated in 552.47(A).Nameplate amperes for motors and heater loads (exhaust fans, air conditioners, electric, gas, or oil heating). Omit smaller of the heating and cooling loads, except include blower motor if used as air-conditioner evaporator motor. Where an air conditioner is not installed and a 50-ampere power-supply cord is provided, allow 15 amperes per phase for air conditioning.Twenty-five percent of current of largest motor in 552.47(B)(2).Total of nameplate amperes for disposal, dishwasher, water heater, clothes dryer, wall-mounted oven, cooking units. Where the number of these appliances exceeds three, use 75 percent of total.Derive amperes for freestanding range (as distinguished from separate ovens and cooking units) by dividing the following values by 240 volts as shown in Table 552.47(B).If outlets or circuits are provided for other than factory-installed appliances, include the anticipated load.Informational Note: See Informative Annex D, Example D12, for an illustration of the application of this calculation. [552.47_(B)](https://2023.antflix.net#552.47_(B))", + "displayTitle": "(B) Total Load for Determining Power Supply", + "children": [], + "url": "https://2023.antflix.net#552.47_(B)" + }, + { + "body": "For park trailers, the optional method for calculating lighting and appliance load shown in 220.82 shall be permitted. Table 552.47(B) Minimum Loads for Freestanding Electric Ranges Nameplate Rating (watts) Use (volt-amperes) 0\u201410,000 80 percent of rating Over 10,000\u201412,500 8,000 Over 12,500\u201413,500 8,400 Over 13,500\u201414,500 8,800 Over 14,500\u201415,500 9,200 Over 15,500\u201416,500 9,600 Over 16,500\u201417,500 10,000 [552.47_(C)](https://2023.antflix.net#552.47_(C))", + "displayTitle": "(C) Optional Method of Calculation for Lighting and Appliance Load", + "children": [], + "url": "https://2023.antflix.net#552.47_(C)" + } + ], + "url": "https://2023.antflix.net#552.47" + }, + { + "displayTitle": "552.48 Wiring Methods", + "children": [ + { + "body": "Cables and raceways installed in accordance with Articles 320, 322, 330 through 340, 342 through 362, 386, and 388 shall be permitted in accordance with their applicable article, except as otherwise specified in this article. An equipment grounding means shall be provided in accordance with 250.118. [552.48_(A)](https://2023.antflix.net#552.48_(A))", + "displayTitle": "(A) Wiring Systems", + "children": [], + "url": "https://2023.antflix.net#552.48_(A)" + }, + { + "body": "Where rigid metal conduit or intermediate metal conduit is terminated at an enclosure with a locknut and bushing connection, two locknuts shall be provided, one inside and one outside of the enclosure. All cut ends of conduit and tubing shall be reamed or otherwise finished to remove rough edges. [552.48_(B)](https://2023.antflix.net#552.48_(B))", + "displayTitle": "(B) Conduit and Tubing", + "children": [], + "url": "https://2023.antflix.net#552.48_(B)" + }, + { + "body": "Nonmetallic boxes shall be acceptable only with nonmetallic-sheathed cable or nonmetallic raceways. [552.48_(C)](https://2023.antflix.net#552.48_(C))", + "displayTitle": "(C) Nonmetallic Boxes", + "children": [], + "url": "https://2023.antflix.net#552.48_(C)" + }, + { + "body": "In walls and ceilings constructed of wood or other combustible material, boxes and fittings shall be flush with the finished surface or project therefrom. [552.48_(D)](https://2023.antflix.net#552.48_(D))", + "displayTitle": "(D) Boxes", + "children": [], + "url": "https://2023.antflix.net#552.48_(D)" + }, + { + "body": "Wall and ceiling boxes shall be mounted in accordance with 314.23. Exception No. 1: Snap-in-type boxes or boxes provided with special wall or ceiling brackets that securely fasten boxes in walls or ceilings shall be permitted. Exception No. 2: A wooden plate providing a 38-mm (11/2-in.) minimum width backing around the box and of a thickness of 13 mm (1/2 in.) or greater (actual) attached directly to the wall panel shall be considered as approved means for mounting outlet boxes. [552.48_(E)](https://2023.antflix.net#552.48_(E))", + "displayTitle": "(E) Mounting", + "children": [], + "url": "https://2023.antflix.net#552.48_(E)" + }, + { + "body": "The sheath of nonmetallic-sheathed cable, and the armor of metal-clad cable and Type AC cable, shall be continuous between outlet boxes and other enclosures. [552.48_(F)](https://2023.antflix.net#552.48_(F))", + "displayTitle": "(F) Cable Sheath", + "children": [], + "url": "https://2023.antflix.net#552.48_(F)" + }, + { + "body": "Metal-clad, Type AC, or nonmetallic-sheathed cables and electrical nonmetallic tubing shall be permitted to pass through the centers of the wide side of 2 by 4 wood studs. However, they shall be protected where they pass through 2 by 2 wood studs or at other wood studs or frames where the cable or tubing would be less than 32 mm (11/4 in.) from the inside or outside surface. Steel plates on each side of the cable or tubing, or a steel tube, with not less than 1.35 mm (0.053 in.) wall thickness, shall be installed to protect the cable or tubing. These plates or tubes shall be securely held in place. Where nonmetallic-sheathed cables pass through punched, cut, or drilled slots or holes in metal members, the cable shall be protected by bushings or grommets securely fastened in the opening prior to installation of the cable. [552.48_(G)](https://2023.antflix.net#552.48_(G))", + "displayTitle": "(G) Protected", + "children": [], + "url": "https://2023.antflix.net#552.48_(G)" + }, + { + "body": "Where connected with cable connectors or clamps, cables shall be secured and supported within 300 mm (12 in.) of outlet boxes, panelboards, and splice boxes on appliances. Supports and securing shall be provided at intervals not exceeding 1.4 m (41/2 ft) at other places. [552.48_(H)](https://2023.antflix.net#552.48_(H))", + "displayTitle": "(H) Cable Supports", + "children": [], + "url": "https://2023.antflix.net#552.48_(H)" + }, + { + "body": "Nonmetallic-sheathed cables shall be secured and supported within 200 mm (8 in.) of a nonmetallic outlet box without cable clamps. Where wiring devices with integral enclosures are employed with a loop of extra cable to permit future replacement of the device, the cable loop shall be considered as an integral portion of the device. [552.48_(I)](https://2023.antflix.net#552.48_(I))", + "displayTitle": "(I) Nonmetallic Box Without Cable Clamps", + "children": [], + "url": "https://2023.antflix.net#552.48_(I)" + }, + { + "body": "Where subject to physical damage, exposed nonmetallic cable shall be protected by covering boards, guard strips, raceways, or other means. [552.48_(J)](https://2023.antflix.net#552.48_(J))", + "displayTitle": "(J) Physical Damage", + "children": [], + "url": "https://2023.antflix.net#552.48_(J)" + }, + { + "body": "Metal faceplates shall comply with 406.6(A). Nonmetallic faceplates shall comply with 406.6(C). [552.48_(K)](https://2023.antflix.net#552.48_(K))", + "displayTitle": "(K) Receptacle Faceplates", + "children": [], + "url": "https://2023.antflix.net#552.48_(K)" + }, + { + "body": "Where metal faceplates are used, they shall be grounded. [552.48_(L)](https://2023.antflix.net#552.48_(L))", + "displayTitle": "(L) Metal Faceplates Grounded", + "children": [], + "url": "https://2023.antflix.net#552.48_(L)" + }, + { + "body": "Where outdoor or under-chassis wiring is 120 volts, nominal, or over and is exposed to moisture or physical damage, the wiring shall be protected by rigid metal conduit, by intermediate metal conduit, by electrical metallic tubing, by rigid polyvinyl chloride conduit, by other raceways identified for the location, or by Type MI cable that is closely routed against frames and equipment enclosures or other raceway or cable identified for the application. [552.48_(M)](https://2023.antflix.net#552.48_(M))", + "displayTitle": "(M) Moisture or Physical Damage", + "children": [], + "url": "https://2023.antflix.net#552.48_(M)" + }, + { + "body": "Fittings and connectors that are intended to be concealed at the time of assembly shall be listed and identified for the interconnection of building components. Such fittings and connectors shall be equal to the wiring method employed in insulation, temperature rise, and fault-current withstanding, and shall be capable of enduring the vibration and shock occurring in park trailers. [552.48_(N)](https://2023.antflix.net#552.48_(N))", + "displayTitle": "(N) Component Interconnections", + "children": [], + "url": "https://2023.antflix.net#552.48_(N)" + }, + { + "body": "The method of connecting expandable units to the main body of the park trailer shall comply with 552.48(O)(1) and 552.48(O)(2) as applicable. [552.48_(O)](https://2023.antflix.net#552.48_(O))", + "displayTitle": "(O) Method of Connecting Expandable Units", + "children": [ + { + "body": "Cord-and-plug connections shall comply with 552.48(O)(1)(a) through (O)(1)(d). The portion of a branch circuit that is installed in an expandable unit shall be permitted to be connected to the portion of the branch circuit in the main body of the vehicle by means of an attachment plug and cord listed for hard usage. The cord and its connections shall comply with Parts I and II of Article 400 and shall be considered as a permitted use under 400.10. Where the attachment plug and cord are located within the park trailer's interior, use of plastic thermoset or elastomer parallel cord Type SPT-3, SP-3, or SPE shall be permitted.Where the receptacle provided for connection of the cord to the main circuit is located on the outside of the park trailer, it shall be protected with a ground-fault circuit interrupter for personnel and be listed for wet locations. A cord located on the outside of a park trailer shall be identified for outdoor use.Unless removable or stored within the park trailer interior, the cord assembly shall have permanent provisions for protection against corrosion and mechanical damage while the park trailer is in transit.The attachment plug and cord shall be installed so as not to permit exposed live attachment plug pins. [552.48_(O)_(1)](https://2023.antflix.net#552.48_(O)_(1))", + "displayTitle": "(1) Cord-and-Plug Connected", + "children": [], + "url": "https://2023.antflix.net#552.48_(O)_(1)" + }, + { + "body": "That portion of a branch circuit that is installed in an expandable unit shall be permitted to be connected to the portion of the branch circuit in the main body of the park trailer by means of flexible cord installed in accordance with 552.48(O)(2)(a) through (O)(2)(f) or other approved wiring method. The flexible cord shall be listed for hard usage and for use in wet locations.The flexible cord shall be permitted to be exposed on the underside of the vehicle.The flexible cord shall be permitted to pass through the interior of a wall or floor assembly or both a maximum concealed length of 600 mm (24 in.) before terminating at an outlet or junction box.Where concealed, the flexible cord shall be installed in nonflexible conduit or tubing that is continuous from the outlet or junction box inside the park trailer to a weatherproof outlet box, junction box, or strain relief fitting listed for use in wet locations that is located on the underside of the park trailer. The outer jacket of flexible cord shall be continuous into the outlet or junction box.Where the flexible cord passes through the floor to an exposed area inside of the park trailer, it shall be protected by means of conduit and bushings or equivalent.Where subject to physical damage, the flexible cord shall be protected with RMC, IMC, Schedule 80 PVC, reinforced thermosetting resin conduit (RTRC) listed for exposure to physical damage, or other approved means and shall extend at least 150 mm (6 in.) above the floor. A means shall be provided to secure the flexible cord where it enters the park trailer. [552.48_(O)_(2)](https://2023.antflix.net#552.48_(O)_(2))", + "displayTitle": "(2) Direct Wires Connected", + "children": [], + "url": "https://2023.antflix.net#552.48_(O)_(2)" + } + ], + "url": "https://2023.antflix.net#552.48_(O)" + }, + { + "body": "Prewiring installed for the purpose of facilitating future air-conditioning installation shall comply with the applicable portions of this article and the following: An overcurrent protective device with a rating compatible with the circuit conductors shall be installed in the panelboard and wiring connections completed.The load end of the circuit shall terminate in a junction box with a blank cover or other listed enclosure. Where a junction box with a blank cover is used, the free ends of the conductors shall be adequately capped or taped.A safety label with the word WARNING in minimum 6 mm (1/4 in.) high letters and body text in minimum 3 mm (1/8 in.) high letters on a contrasting background shall be affixed on or adjacent to the junction box and shall read as follows:WARNINGAIR-CONDITIONING CIRCUIT. THIS CONNECTION IS FOR AIR CONDITIONERSRATED 110\u2014125-VOLT AC, 60 HZ, _________ AMPERES MAXIMUM. DO NOT EXCEED CIRCUIT RATING.EXCEEDING THE CIRCUIT RATING MAYCAUSE A FIRE AND RESULT INDEATH OR SERIOUS INJURYAn ampere rating not to exceed 80 percent of the circuit rating shall be legibly marked in the blank space.The circuit shall serve no other purpose. [552.48_(P)](https://2023.antflix.net#552.48_(P))", + "displayTitle": "(P) Prewiring for Air-Conditioning Installation", + "children": [], + "url": "https://2023.antflix.net#552.48_(P)" + }, + { + "body": "Prewiring installed for the purpose of installing other appliances or devices shall comply with the applicable portions of this article and the following: An overcurrent protection device with a rating compatible with the circuit conductors shall be installed in the panelboard with wiring connections completed.The load end of the circuit shall terminate in a junction box with a blank cover or a device listed for the purpose. Where a junction box with blank cover is used, the free ends of the conductors shall be adequately capped or taped.A safety label with the signal word WARNING in minimum 6 mm (1/4 in.) high letters and body text in minimum 3 mm (1/8 in.) high letters on a contrasting background shall be affixed on or adjacent to the junction box or device listed for the purpose and shall read as follows:WARNINGTHIS CONNECTION IS FOR ______ RATED ______ VOLT AC,60 HZ, _______ AMPERES MAXIMUM. DO NOT EXCEEDCIRCUIT RATING. EXCEEDING THE CIRCUIT RATINGMAY CAUSE A FIRE AND RESULT IN DEATH OR SERIOUSINJURY.An ampere rating not to exceed 80 percent of the circuit rating shall be legibly marked in the blank space. [552.48_(Q)](https://2023.antflix.net#552.48_(Q))", + "displayTitle": "(Q) Prewiring for Other Circuits", + "children": [], + "url": "https://2023.antflix.net#552.48_(Q)" + } + ], + "url": "https://2023.antflix.net#552.48" + }, + { + "body": "The maximum number of conductors permitted in boxes shall be in accordance with 314.16. [552.49](https://2023.antflix.net#552.49)", + "displayTitle": "552.49 Maximum Number of Conductors in Boxes", + "children": [], + "url": "https://2023.antflix.net#552.49" + }, + { + "body": "The identification of grounded conductors shall be in accordance with 200.6. [552.50](https://2023.antflix.net#552.50)", + "displayTitle": "552.50 Grounded Conductors", + "children": [], + "url": "https://2023.antflix.net#552.50" + }, + { + "body": "Conductor splices and connections at terminals shall be in accordance with 110.14. [552.51](https://2023.antflix.net#552.51)", + "displayTitle": "552.51 Connection of Terminals and Splices", + "children": [], + "url": "https://2023.antflix.net#552.51" + }, + { + "body": "Switches shall be rated as required by 552.52(A) and (B). [552.52](https://2023.antflix.net#552.52)", + "displayTitle": "552.52 Switches", + "children": [ + { + "body": "For lighting circuits, switches shall be rated not less than 10 amperes, 120/125 volts, and in no case less than the connected load. [552.52_(A)](https://2023.antflix.net#552.52_(A))", + "displayTitle": "(A) Lighting Circuits", + "children": [], + "url": "https://2023.antflix.net#552.52_(A)" + }, + { + "body": "For motors or other loads, switches shall have ampere or horsepower ratings, or both, adequate for loads controlled. (An ac general-use snap switch shall be permitted to control a motor 2 hp or less with full-load current not over 80 percent of the switch ampere rating.) [552.52_(B)](https://2023.antflix.net#552.52_(B))", + "displayTitle": "(B) Motors or Other Loads", + "children": [], + "url": "https://2023.antflix.net#552.52_(B)" + }, + { + "body": "Switches shall not be installed within wet locations in tub or shower spaces unless installed as part of a listed tub or shower assembly. [552.52_(C)](https://2023.antflix.net#552.52_(C))", + "displayTitle": "(C) Location", + "children": [], + "url": "https://2023.antflix.net#552.52_(C)" + } + ], + "url": "https://2023.antflix.net#552.52" + }, + { + "body": "All receptacle outlets shall be of the grounding type and installed in accordance with 210.21 and 406.4. [552.53](https://2023.antflix.net#552.53)", + "displayTitle": "552.53 Receptacles", + "children": [], + "url": "https://2023.antflix.net#552.53" + }, + { + "displayTitle": "552.54 Luminaires", + "children": [ + { + "body": "Any combustible wall or ceiling finish exposed between the edge of a canopy or pan of a luminaire or ceiling suspended (paddle) fan and the outlet box shall be covered with noncombustible material or a material identified for the purpose. [552.54_(A)](https://2023.antflix.net#552.54_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#552.54_(A)" + }, + { + "body": "If a luminaire is provided over a bathtub or in a shower stall, it shall be of the enclosed and gasketed type and listed for the type of installation, and it shall be ground-fault circuit-interrupter protected. [552.54_(B)](https://2023.antflix.net#552.54_(B))", + "displayTitle": "(B) Shower Luminaires", + "children": [], + "url": "https://2023.antflix.net#552.54_(B)" + }, + { + "body": "Outdoor luminaires and other equipment shall be listed for outdoor use or wet locations. [552.54_(C)](https://2023.antflix.net#552.54_(C))", + "displayTitle": "(C) Outdoor Outlets, Luminaires, Air-Cooling Equipment, and So On", + "children": [], + "url": "https://2023.antflix.net#552.54_(C)" + } + ], + "url": "https://2023.antflix.net#552.54" + }, + { + "body": "(See also 552.57 on bonding of noncurrent-carrying metal parts.) [552.55](https://2023.antflix.net#552.55)", + "displayTitle": "552.55 Grounding", + "children": [ + { + "body": "The equipment grounding conductor in the supply cord or feeder shall be connected to the equipment grounding bus or other approved equipment grounding means in the panelboard. [552.55_(A)](https://2023.antflix.net#552.55_(A))", + "displayTitle": "(A) Power-Supply Grounding", + "children": [], + "url": "https://2023.antflix.net#552.55_(A)" + }, + { + "body": "The panelboard shall have an equipment grounding bus with sufficient terminals for all equipment grounding conductors or other approved grounding means. [552.55_(B)](https://2023.antflix.net#552.55_(B))", + "displayTitle": "(B) Panelboard", + "children": [], + "url": "https://2023.antflix.net#552.55_(B)" + }, + { + "body": "The grounded circuit conductor shall be insulated from the equipment grounding conductors and from equipment enclosures and other grounded parts. The grounded circuit conductor terminals in the panelboard and in ranges, clothes dryers, counter-mounted cooking units, and wall-mounted ovens shall be insulated from the equipment enclosure. Bonding screws, straps, or buses in the panelboard or in appliances shall be removed and discarded. Connection of electric ranges and electric clothes dryers utilizing a grounded conductor, if cord-connected, shall be made with 4-conductor cord and 3-pole, 4-wire, grounding-type plug caps and receptacles. [552.55_(C)](https://2023.antflix.net#552.55_(C))", + "displayTitle": "(C) Insulated Grounded Conductor", + "children": [], + "url": "https://2023.antflix.net#552.55_(C)" + } + ], + "url": "https://2023.antflix.net#552.55" + }, + { + "displayTitle": "552.56 Interior Equipment Grounding", + "children": [ + { + "body": "In the electrical system, all exposed metal parts, enclosures, frames, luminaire canopies, and so forth, shall be effectively bonded to the grounding terminals or enclosure of the panelboard. [552.56_(A)](https://2023.antflix.net#552.56_(A))", + "displayTitle": "(A) Exposed Metal Parts", + "children": [], + "url": "https://2023.antflix.net#552.56_(A)" + }, + { + "body": "Bare conductors or conductors with insulation or individual covering that is green or green with one or more yellow stripes shall be used for equipment grounding conductors only. [552.56_(B)](https://2023.antflix.net#552.56_(B))", + "displayTitle": "(B) Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#552.56_(B)" + }, + { + "body": "Where grounding of electrical equipment is specified, it shall be permitted as follows: Connection of metal raceway (conduit or electrical metallic tubing), the sheath of Type MC and Type MI cable where the sheath is identified for grounding, or the armor of Type AC cable to metal enclosures.A connection between the one or more equipment grounding conductors and a metal box by means of a grounding screw, which shall be used for no other purpose, or a listed grounding device.The equipment grounding conductor in nonmetallic-sheathed cable shall be permitted to be secured under a screw threaded into the luminaire canopy other than a mounting screw or cover screw or attached to a listed grounding means (plate) in a nonmetallic outlet box for luminaire mounting (grounding means shall also be permitted for luminaire attachment screws). [552.56_(C)](https://2023.antflix.net#552.56_(C))", + "displayTitle": "(C) Grounding of Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#552.56_(C)" + }, + { + "body": "A connection between the one or more grounding conductors brought into a nonmetallic outlet box shall be arranged so that a connection can be made to any fitting or device in that box that requires grounding. [552.56_(D)](https://2023.antflix.net#552.56_(D))", + "displayTitle": "(D) Grounding Connection in Nonmetallic Box", + "children": [], + "url": "https://2023.antflix.net#552.56_(D)" + }, + { + "body": "Where more than one equipment grounding conductor of a branch circuit enters a box, all such conductors shall be in good electrical contact with each other, and the arrangement shall be such that the disconnection or removal of a receptacle, fixture, including a luminaire, or other device fed from the box will not interfere with or interrupt the grounding continuity. [552.56_(E)](https://2023.antflix.net#552.56_(E))", + "displayTitle": "(E) Grounding Continuity", + "children": [], + "url": "https://2023.antflix.net#552.56_(E)" + }, + { + "body": "Cord-connected appliances, such as washing machines, clothes dryers, refrigerators, and the electrical system of gas ranges, and so on, shall be grounded by means of an approved cord with equipment grounding conductor and grounding-type attachment plug. [552.56_(F)](https://2023.antflix.net#552.56_(F))", + "displayTitle": "(F) Cord-Connected Appliances", + "children": [], + "url": "https://2023.antflix.net#552.56_(F)" + } + ], + "url": "https://2023.antflix.net#552.56" + }, + { + "displayTitle": "552.57 Bonding of Non-Current-Carrying Metal Parts", + "children": [ + { + "body": "All exposed non\u2014current-carrying metal parts that are likely to become energized shall be effectively bonded to the grounding terminal or enclosure of the panelboard. [552.57_(A)](https://2023.antflix.net#552.57_(A))", + "displayTitle": "(A) Required Bonding", + "children": [], + "url": "https://2023.antflix.net#552.57_(A)" + }, + { + "body": "A bonding conductor shall be connected between any panelboard and an accessible terminal on the chassis. Bonding terminations shall be suitable for the environment in which the conductors and terminations are installed. Exception: Any park trailer that employs a unitized metal chassis-frame construction to which the panelboard is securely fastened with a bolt(s) and nut(s) or by welding or riveting shall be considered to be bonded. [552.57_(B)](https://2023.antflix.net#552.57_(B))", + "displayTitle": "(B) Bonding Chassis", + "children": [], + "url": "https://2023.antflix.net#552.57_(B)" + }, + { + "body": "Grounding terminals shall be of the solderless type and listed as pressure terminal connectors recognized for the wire size used. The bonding conductor shall be solid or stranded, insulated or bare, and shall be 8 AWG copper minimum or equivalent. [552.57_(C)](https://2023.antflix.net#552.57_(C))", + "displayTitle": "(C) Bonding Conductor Requirements", + "children": [], + "url": "https://2023.antflix.net#552.57_(C)" + }, + { + "body": "The metal roof and exterior covering shall be considered bonded where both of the following conditions apply: The metal panels overlap one another and are securely attached to the wood or metal frame parts by metal fasteners.The lower panel of the metal exterior covering is secured by metal fasteners at each cross member of the chassis, or the lower panel is connected to the chassis by a metal strap. [552.57_(D)](https://2023.antflix.net#552.57_(D))", + "displayTitle": "(D) Metallic Roof and Exterior Bonding", + "children": [], + "url": "https://2023.antflix.net#552.57_(D)" + }, + { + "body": "The gas, water, and waste pipes shall be considered grounded if they are bonded to the chassis. [552.57_(E)](https://2023.antflix.net#552.57_(E))", + "displayTitle": "(E) Gas, Water, and Waste Pipe Bonding", + "children": [], + "url": "https://2023.antflix.net#552.57_(E)" + }, + { + "body": "Furnace and metal circulating air ducts shall be bonded. [552.57_(F)](https://2023.antflix.net#552.57_(F))", + "displayTitle": "(F) Furnace and Metal Air Duct Bonding", + "children": [], + "url": "https://2023.antflix.net#552.57_(F)" + } + ], + "url": "https://2023.antflix.net#552.57" + }, + { + "body": "Every appliance shall be accessible for inspection, service, repair, and replacement without removal of permanent construction. Means shall be provided to securely fasten appliances in place when the park trailer is in transit. [552.58](https://2023.antflix.net#552.58)", + "displayTitle": "552.58 Appliance Accessibility and Fastening", + "children": [], + "url": "https://2023.antflix.net#552.58" + }, + { + "displayTitle": "552.59 Outdoor Outlets, Fixtures, Including Luminaires, Air-Cooling Equipment, and So On", + "children": [ + { + "body": "Outdoor fixtures, including luminaires, and equipment shall be listed for outdoor use. Outdoor receptacle outlets shall be in accordance with 406.9(A) and (B). Switches and circuit breakers installed outdoors shall comply with 404.4. [552.59_(A)](https://2023.antflix.net#552.59_(A))", + "displayTitle": "(A) Listed for Outdoor Use", + "children": [], + "url": "https://2023.antflix.net#552.59_(A)" + }, + { + "body": "A park trailer provided with a branch circuit designed to energize outside heating equipment or air-conditioning equipment, or both, located outside the park trailer, other than room air conditioners, shall have such branch-circuit conductors terminate in a listed outlet box or disconnecting means located on the outside of the park trailer. A safety label with the word WARNING in minimum 6 mm (1/4 in.) high letters and body text in minimum 3 mm (1/8 in.) high letters on a contrasting background shall be affixed within 150 mm (6 in.) from the listed box or disconnecting means and shall read as follows: WARNINGTHIS CONNECTION IS FOR HEATINGAND/OR AIR-CONDITIONING EQUIPMENT.THE BRANCH CIRCUIT IS RATED AT NOT MORE THAN_______ AMPERES, AT _______ VOLTS, 60 HZ, _______CONDUCTOR AMPACITY. A DISCONNECTING MEANS SHALL BELOCATED WITHIN SIGHT OF THE EQUIPMENT. EXCEEDING THE CIRCUIT RATING MAY CAUSE A FIREAND RESULT IN DEATH OR SERIOUS INJURY. The correct voltage and ampere rating shall be given. [552.59_(B)](https://2023.antflix.net#552.59_(B))", + "displayTitle": "(B) Outside Heating Equipment, Air-Conditioning Equipment, or Both", + "children": [], + "url": "https://2023.antflix.net#552.59_(B)" + } + ], + "url": "https://2023.antflix.net#552.59" + }, + { + "displayTitle": "Part V Factory Tests", + "children": [], + "url": "https://2023.antflix.net#divider_20_V" + }, + { + "body": "Each park trailer shall be subjected to the tests required by 552.60(A) and (B). [552.60](https://2023.antflix.net#552.60)", + "displayTitle": "552.60 Factory Tests (Electrical)", + "children": [ + { + "body": "Each park trailer designed with a 120-volt or a 120/240-volt electrical system shall withstand the applied voltage without electrical breakdown of a 1 minute, 900-volt dielectric strength test, or a 1 second, 1080-volt dielectric strength test, with all switches closed, between ungrounded and grounded conductors and the park trailer ground. During the test, all switches and other controls shall be in the \"on\" position. Fixtures, including luminaires, and permanently installed appliances shall not be required to withstand this test. Each park trailer shall be subjected to the following:A continuity test to ensure that all metal parts are properly bondedOperational tests to demonstrate that all equipment is properly connected and in working orderPolarity checks to determine that connections have been properly madeReceptacles requiring GFCI protection shall be tested for correct function by the use of a GFCI testing device [552.60_(A)](https://2023.antflix.net#552.60_(A))", + "displayTitle": "(A) Circuits of 120 Volts or 120/240 Volts", + "children": [], + "url": "https://2023.antflix.net#552.60_(A)" + }, + { + "body": "An operational test of low-voltage circuits shall be conducted to demonstrate that all equipment is connected and in electrical working order. This test shall be performed in the final stages of production after all outer coverings and cabinetry have been secured. [552.60_(B)](https://2023.antflix.net#552.60_(B))", + "displayTitle": "(B) Low-Voltage Circuits", + "children": [], + "url": "https://2023.antflix.net#552.60_(B)" + } + ], + "url": "https://2023.antflix.net#552.60" + } + ], + "url": "https://2023.antflix.net#552" + }, + { + "displayTitle": "Article 555 Marinas, Boatyards, Floating Buildings, and Commercial and Noncommercial Docking Facilities", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_89_I" + }, + { + "body": "This article covers the installation of wiring and equipment in the areas comprising fixed or floating piers, wharves, docks, floating buildings, and other areas in marinas, boatyards, boat basins, boathouses, yacht clubs, boat condominiums, docking facilities associated with one-family dwellings, two-family dwellings, multifamily dwellings, and residential condominiums; any multiple docking facility or similar occupancies; and facilities that are used, or intended for use, for the purpose of repair, berthing, launching, storage, or fueling of small craft and the moorage of floating buildings. Informational Note No. 1: See NFPA 303-2016, Fire Protection Standard for Marinas and Boatyards, for additional information. Informational Note No. 2: Where boats, floating buildings, docks, and similar structures are connected to an electrical source or a supply of electricity, hazardous voltages and currents may create serious safety concerns. Informational Note No. 3: Text that is followed by a reference in brackets has been extracted from NFPA 303-2016, Fire Protection Standard for Marinas and Boatyards, and NFPA 307-2016, Standard for the Construction and Fire Protection of Marine Terminals, Piers, and Wharves. Only editorial changes were made to the extracted text to make it consistent with this Code. [555.1](https://2023.antflix.net#555.1)", + "displayTitle": "555.1 Scope", + "children": [], + "url": "https://2023.antflix.net#555.1" + }, + { + "displayTitle": "555.3 Electrical Datum Plane Distances", + "children": [ + { + "body": "The electrical datum plane for floating piers and boat landing stages that is (1) installed to permit rise and fall response to water level and without lateral movement, and (2) that are so equipped that piers and landing stages can rise to the datum plane established for 555.3(B) or (C), shall be a horizontal plane 762 mm (30 in.) above the water level at the floating pier or boat landing stage and a minimum of 305 mm (12 in.) above the level of the deck. [555.3_(A)](https://2023.antflix.net#555.3_(A))", + "displayTitle": "(A) Floating Piers", + "children": [], + "url": "https://2023.antflix.net#555.3_(A)" + }, + { + "body": "In land areas subject to tidal fluctuation, the electrical datum plane shall be a horizontal plane that is 606 mm (2 ft) above the highest tide level for the area occurring under normal circumstances, based on the highest high tide. [555.3_(B)](https://2023.antflix.net#555.3_(B))", + "displayTitle": "(B) Areas Subject to Tidal Fluctuations", + "children": [], + "url": "https://2023.antflix.net#555.3_(B)" + }, + { + "body": "In land areas not subject to tidal fluctuation, the electrical datum plane shall be a horizontal plane that is 606 mm (2 ft) above the highest water level for the area occurring under normal circumstances. [555.3_(C)](https://2023.antflix.net#555.3_(C))", + "displayTitle": "(C) Areas Not Subject to Tidal Fluctuations", + "children": [], + "url": "https://2023.antflix.net#555.3_(C)" + } + ], + "url": "https://2023.antflix.net#555.3" + }, + { + "body": "The service equipment for a floating building, dock, or marina shall be located on land no closer than 1.5 m (5 ft) horizontally from and adjacent to the structure served, but not on or in the structure itself or any other floating structure. Service equipment shall be elevated a minimum of 300 mm (12 in.) above the electrical datum plane. [555.4](https://2023.antflix.net#555.4)", + "displayTitle": "555.4 Location of Service Equipment", + "children": [], + "url": "https://2023.antflix.net#555.4" + }, + { + "body": "Pier power distribution systems shall not exceed 250 volts phase to phase. Pier power distribution systems, where qualified personnel service the equipment under engineering supervision, shall be permitted to exceed 250 volts but these systems shall not exceed 600 volts. [555.5](https://2023.antflix.net#555.5)", + "displayTitle": "555.5 Maximum Voltage", + "children": [], + "url": "https://2023.antflix.net#555.5" + }, + { + "body": "General lighting and other loads shall be calculated in accordance with Part III of Article 220, and, in addition, the demand factors set forth in 220.120 shall be permitted for each service and/or feeder circuit supplying receptacles that provide shore power for boats. [555.6](https://2023.antflix.net#555.6)", + "displayTitle": "555.6 Load Calculations for Service and Feeder Conductors", + "children": [], + "url": "https://2023.antflix.net#555.6" + }, + { + "displayTitle": "555.7 Transformers", + "children": [ + { + "body": "Transformers and enclosures shall be identified for wet locations. The bottom of transformer enclosures shall not be located below the electrical datum plane. [555.7_(A)](https://2023.antflix.net#555.7_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#555.7_(A)" + }, + { + "body": "Transformers and enclosures shall be identified for wet locations where replacements are made. [555.7_(B)](https://2023.antflix.net#555.7_(B))", + "displayTitle": "(B) Replacements", + "children": [], + "url": "https://2023.antflix.net#555.7_(B)" + } + ], + "url": "https://2023.antflix.net#555.7" + }, + { + "body": "Motors and controls for marine hoists, railways, cranes, and monorails shall not be located below the electrical datum plane. Where it is necessary to provide electric power to a mobile crane or hoist in the yard and a trailing cable is utilized, it shall be a listed portable power cable rated for the conditions of use and be provided with an outer jacket of distinctive color for safety. [555.8](https://2023.antflix.net#555.8)", + "displayTitle": "555.8 Marine Hoists, Railways, Cranes, and Monorails", + "children": [], + "url": "https://2023.antflix.net#555.8" + }, + { + "body": "Permanent safety signs shall be installed to give notice of electrical shock hazard risks to persons using or swimming near a docking facility, boatyard, or marina and shall comply with all of the following: The signage shall comply with 110.21(B)(1) and be of sufficient durability to withstand the environment.The signs shall be clearly visible from all approaches to a marina, docking facility, or boatyard facility.The signs shall state \"WARNING - POTENTIAL SHOCK HAZARD - ELECTRICAL CURRENTS MAY BE PRESENT IN THE WATER.\" [555.10](https://2023.antflix.net#555.10)", + "displayTitle": "555.10 Signage", + "children": [], + "url": "https://2023.antflix.net#555.10" + }, + { + "body": "Electrical wiring and equipment located at or serving motor fuel dispensing locations shall comply with Article 514 in addition to the requirements of this article. [555.11](https://2023.antflix.net#555.11)", + "displayTitle": "555.11 Motor Fuel Dispensing Stations - Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#555.11" + }, + { + "body": "Electrical wiring and equipment located at facilities for the repair of marine craft containing flammable or combustible liquids or gases shall comply with Article 511 in addition to the requirements of this article. [555.12](https://2023.antflix.net#555.12)", + "displayTitle": "555.12 Repair Facilities - Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#555.12" + }, + { + "body": "All metal parts in contact with the water, all metal piping, and all non-current-carrying metal parts that are likely to become energized and that are not connected to a branch circuit or feeder equipment grounding conductor, shall be connected to the grounding bus in the panelboard using solid copper conductors; insulated, covered, or bare; not smaller than 8 AWG. Connections to bonded parts shall be made in accordance with 250.8. [555.13](https://2023.antflix.net#555.13)", + "displayTitle": "555.13 Bonding of Non-Current-Carrying Metal Parts", + "children": [], + "url": "https://2023.antflix.net#555.13" + }, + { + "body": "An equipotential plane shall be installed where required in this section to mitigate step and touch voltages at electrical equipment. The parts specified in this section shall be bonded together and to the electrical grounding system. The bonding conductor shall be solid copper conductors; insulated, covered, or bare; not smaller than 8 AWG. [555.14](https://2023.antflix.net#555.14)", + "displayTitle": "555.14 Equipotential Planes and Bonding of Equipotential Planes", + "children": [ + { + "body": "Equipotential planes shall be installed adjacent to all outdoor service equipment or disconnecting means that control equipment in or on water where the following conditions exist: Where the system voltage exceeds 250 volts to groundWhere the equipment is located within 3 m (10 ft) of the body of waterThe equipotential plane shall include all metallic enclosures and controls that are likely to become energized and are accessible to personnel. The equipotential plane shall encompass the area around the equipment and shall extend from the area directly below the equipment out not less than 900 mm (36 in.) in all directions from which a person would be able to stand and come in contact with the equipment. [555.14_(A)](https://2023.antflix.net#555.14_(A))", + "displayTitle": "(A) Areas Requiring Equipotential Planes", + "children": [], + "url": "https://2023.antflix.net#555.14_(A)" + }, + { + "body": "Equipotential planes shall not be required for the controlled utilization equipment on the docking facility or floating building supplied by the service equipment or disconnecting means. [555.14_(B)](https://2023.antflix.net#555.14_(B))", + "displayTitle": "(B) Areas Not Requiring Equipotential Planes", + "children": [], + "url": "https://2023.antflix.net#555.14_(B)" + } + ], + "url": "https://2023.antflix.net#555.14" + }, + { + "body": "When modifications or replacements of electrical enclosures, devices, or wiring methods are necessary on a docking facility, they shall be required to comply with the requirements of this Code, and the installation shall require an inspection of the circuit. Existing equipment that has been damaged shall be identified, documented, and repaired by a qualified person to the minimum requirements of the edition of this Code to which it was originally installed.\nInformational Note: NFPA 303-2021, Fire Protection Standard for Marinas and Boatyards, is a resource for guiding the electrical inspection of a marina. [555.15](https://2023.antflix.net#555.15)", + "displayTitle": "555.15 Replacement of Equipment", + "children": [], + "url": "https://2023.antflix.net#555.15" + }, + { + "displayTitle": "Part II Marinas, Boatyards, and Docking Facilities", + "children": [], + "url": "https://2023.antflix.net#divider_89_II" + }, + { + "displayTitle": "555.30 Electrical Equipment and Connections", + "children": [ + { + "body": "All electrical components within electrical equipment (excluding wiring methods) and connections not intended for operation while submerged shall be located at least 305 mm (12 in.) above the deck of a fixed or floating structure, but not below the electrical datum plane. Conductor splices, within junction boxes identified for wet locations, utilizing sealed wire connector systems listed and identified for submersion shall be required for floating structures where located above the waterline but below the electrical datum plane. [555.30_(A)](https://2023.antflix.net#555.30_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#555.30_(A)" + }, + { + "body": "Replacement electrical connections shall be located at least 305 mm (12 in.) above the deck of a floating or fixed structure. Conductor splices, within junction boxes identified for wet locations, utilizing sealed wire connector systems listed and identified for submersion shall be required where located above the waterline but below the electrical datum plane. [555.30_(B)](https://2023.antflix.net#555.30_(B))", + "displayTitle": "(B) Replacements", + "children": [], + "url": "https://2023.antflix.net#555.30_(B)" + } + ], + "url": "https://2023.antflix.net#555.30" + }, + { + "displayTitle": "555.31 Electrical Equipment Enclosures", + "children": [ + { + "body": "Electrical equipment enclosures installed on piers above deck level shall be securely and substantially supported by structural members, independent of any conduit connected to them. If enclosures are not attached to mounting surfaces by means of external ears or lugs, the internal screw heads shall be sealed to prevent seepage of water through mounting holes. [555.31_(A)](https://2023.antflix.net#555.31_(A))", + "displayTitle": "(A) Securing and Supporting", + "children": [], + "url": "https://2023.antflix.net#555.31_(A)" + }, + { + "body": "Electrical equipment enclosures on piers shall be located so as not to interfere with mooring lines. [555.31_(B)](https://2023.antflix.net#555.31_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#555.31_(B)" + } + ], + "url": "https://2023.antflix.net#555.31" + }, + { + "body": "Circuit breakers and switches installed in gasketed enclosures shall be arranged to permit required manual operation without exposing the interior of the enclosure. All such enclosures shall be arranged with a weep hole to discharge condensation. [555.32](https://2023.antflix.net#555.32)", + "displayTitle": "555.32 Circuit Breakers, Switches, Panelboards, and Marina Power Outlets", + "children": [], + "url": "https://2023.antflix.net#555.32" + }, + { + "body": "Receptacles shall be mounted not less than 305 mm (12 in.) above the deck surface of the pier and not below the electrical datum plane on a fixed pier. [555.33](https://2023.antflix.net#555.33)", + "displayTitle": "555.33 Receptacles", + "children": [ + { + "displayTitle": "(A) Shore Power Receptacles", + "children": [ + { + "body": "Receptacles intended to supply shore power to boats shall be enclosed in listed marina power outlets, enclosures listed for wet locations, or shall be installed in listed enclosures protected from the weather. The integrity of the assembly shall not be affected when the receptacles are in use with any type of booted or nonbooted attachment plug/cap inserted. [555.33_(A)_(1)](https://2023.antflix.net#555.33_(A)_(1))", + "displayTitle": "(1) Enclosures", + "children": [], + "url": "https://2023.antflix.net#555.33_(A)_(1)" + }, + { + "body": "Means shall be provided where necessary to reduce the strain on the plug and receptacle caused by the weight and catenary angle of the shore power cord. [555.33_(A)_(2)](https://2023.antflix.net#555.33_(A)_(2))", + "displayTitle": "(2) Strain Relief", + "children": [], + "url": "https://2023.antflix.net#555.33_(A)_(2)" + }, + { + "body": "Each single receptacle that supplies shore power to boats shall be supplied from a marina power outlet or panelboard by an individual branch circuit of the voltage class and rating corresponding to the rating of the receptacle. Informational Note: Supplying receptacles at voltages other than the voltages marked on the receptacle may cause overheating or malfunctioning of connected equipment, for example, supplying single-phase, 120/240-volt, 3-wire loads from a 208Y/120-volt, 3-wire source. [555.33_(A)_(3)](https://2023.antflix.net#555.33_(A)_(3))", + "displayTitle": "(3) Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#555.33_(A)_(3)" + }, + { + "body": "Shore power for boats shall be provided by single receptacles rated not less than 30 amperes. Informational Note: See NFPA 303-2016, Fire Protection Standard for Marinas and Boatyards, for locking- and grounding-type receptacles for auxiliary power to boats.Receptacles rated 30 amperes and 50 amperes shall be of the locking and grounding type.Informational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, for various configurations and ratings of locking- and grounding-type receptacles and caps.Receptacles rated 60 amperes or higher shall be of the pin and sleeve type.Informational Note: See ANSI/UL 1686, UL Standard for Safety Pin and Sleeve Configurations, for various configurations and ratings of pin and sleeve receptacles. [555.33_(A)_(4)](https://2023.antflix.net#555.33_(A)_(4))", + "displayTitle": "(4) Ratings", + "children": [], + "url": "https://2023.antflix.net#555.33_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#555.33_(A)" + }, + { + "body": "Receptacles other than those supplying shore power to boats shall be permitted to be enclosed in marina power outlets with the receptacles that provide shore power to boats, provided the receptacles are marked to clearly indicate that the receptacles are not to be used to supply power to boats. [555.33_(B)](https://2023.antflix.net#555.33_(B))", + "displayTitle": "(B) Other Than Shore Power", + "children": [], + "url": "https://2023.antflix.net#555.33_(B)" + }, + { + "body": "The requirements in 555.33 shall apply to the replacement of marina receptacles. [555.33_(C)](https://2023.antflix.net#555.33_(C))", + "displayTitle": "(C) Replacement Receptacles", + "children": [], + "url": "https://2023.antflix.net#555.33_(C)" + } + ], + "url": "https://2023.antflix.net#555.33" + }, + { + "displayTitle": "555.34 Wiring Methods and Installation", + "children": [ + { + "displayTitle": "(A) Wiring Methods", + "children": [ + { + "body": "Wiring methods of Chapter 3 shall be permitted where identified for use in wet locations and shall contain a wire-type insulated equipment grounding conductor. [555.34_(A)_(1)](https://2023.antflix.net#555.34_(A)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#555.34_(A)_(1)" + }, + { + "body": "Extra-hard usage cord and extra-hard usage portable power cables rated not less than 75\u00b0C (167\u00b0F) and 600 volts, listed for use in the environment within which it is installed, shall be permitted as follows: As permanent wiring on the underside of piers (floating or fixed)Where flexibility is necessary as on piers composed of floating sections [555.34_(A)_(2)](https://2023.antflix.net#555.34_(A)_(2))", + "displayTitle": "(2) Portable Power Cables", + "children": [], + "url": "https://2023.antflix.net#555.34_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#555.34_(A)" + }, + { + "displayTitle": "(B) Installation", + "children": [ + { + "body": "Overhead wiring shall be installed to avoid possible contact with masts and other parts of boats being moved in the yard. Conductors and cables shall be routed to avoid wiring closer than 6.0 m (20 ft) from the outer edge or any portion of the yard that can be used for moving vessels or stepping or unstepping masts. [555.34_(B)_(1)](https://2023.antflix.net#555.34_(B)_(1))", + "displayTitle": "(1) Overhead Wiring", + "children": [], + "url": "https://2023.antflix.net#555.34_(B)_(1)" + }, + { + "body": "Multiple feeders and branch circuits shall be permitted and clearances for overhead branch-circuit and feeder wiring in locations of the boatyard other than those described in 555.34(B)(1) shall be located not less than 5.49 m (18 ft) above grade. Only Part I of Article 225 shall apply to marina installations. [555.34_(B)_(2)](https://2023.antflix.net#555.34_(B)_(2))", + "displayTitle": "(2) Outdoor Branch Circuits and Feeders", + "children": [], + "url": "https://2023.antflix.net#555.34_(B)_(2)" + }, + { + "body": "Where portable power cables are permitted by 555.34(A)(2), the installation shall comply with the following:Cables shall be properly supported.Cables shall be located on the underside of the pier.Cables shall be securely fastened by nonmetallic clips to structural members other than the deck planking.Cables shall not be installed where subject to physical damage.Where cables pass through structural members, they shall be protected against chafing by a permanently installed oversized sleeve of nonmetallic material.Where portable power cables are used as permitted in 555.34(A)(2)(2), there shall be a junction box of corrosion-resistant construction with permanently installed terminal blocks on each pier section to which the feeders and feeder extensions are to be connected. A listed marina power outlet employing terminal blocks/bars shall be permitted in lieu of a junction box. Metal junction boxes and covers, and metal screws and parts that are exposed externally to the boxes, shall be of corrosion-resistant materials or protected by material resistant to corrosion. [555.34_(B)_(3)](https://2023.antflix.net#555.34_(B)_(3))", + "displayTitle": "(3) Portable Power Cables", + "children": [], + "url": "https://2023.antflix.net#555.34_(B)_(3)" + }, + { + "body": "Rigid metal conduit, intermediate metal conduit, reinforced thermosetting resin conduit (RTRC) listed for aboveground use, or rigid polyvinyl chloride (PVC) conduit suitable for the location shall be used to protect wiring to a point at least 2.5 m (8 ft) above docks, decks of piers, and landing stages. The conduit shall be connected to the enclosure by full standard threads or fittings listed for use in damp or wet locations, as applicable. [555.34_(B)_(4)](https://2023.antflix.net#555.34_(B)_(4))", + "displayTitle": "(4) Protection", + "children": [], + "url": "https://2023.antflix.net#555.34_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#555.34_(B)" + } + ], + "url": "https://2023.antflix.net#555.34" + }, + { + "body": "For other than floating buildings, ground-fault protection for docking facilities shall be provided in accordance with 555.35(A) through (D). [555.35](https://2023.antflix.net#555.35)", + "displayTitle": "555.35 Ground-Fault Protection of Equipment (GFPE) and Ground-Fault Circuit Interrupter", + "children": [ + { + "body": "Listed GFPE, rated not more than 100 milliamperes, shall be provided for feeders installed on docking facilities. Coordination with downstream GFPE shall be permitted at the feeder overcurrent protective device. Exception: Transformer secondary conductors of a separately derived system that do not exceed 3 m (10 ft) and are installed in a raceway shall be permitted to be installed without ground-fault protection. This exception shall also apply to the supply terminals of the equipment supplied by the transformer secondary conductors. [555.35_(A)](https://2023.antflix.net#555.35_(A))", + "displayTitle": "(A) Feeder", + "children": [], + "url": "https://2023.antflix.net#555.35_(A)" + }, + { + "displayTitle": "(B) Branch-Circuits", + "children": [ + { + "body": "Listed GFPE, rated not more than 30 milliamperes, shall be provided for receptacles installed in accordance with 555.33(A). [555.35_(B)_(1)](https://2023.antflix.net#555.35_(B)_(1))", + "displayTitle": "(1) Receptacles Providing Shore Power", + "children": [], + "url": "https://2023.antflix.net#555.35_(B)_(1)" + }, + { + "body": "Outlets supplied by branch circuits not exceeding 150 volts to ground and 60 amperes, single phase, and 150 volts or less to ground, 100 amperes or less, three phase, shall be provided with GFCI protection for personnel. Exception to (B): Low-voltage circuits not requiring grounding, not exceeding the low-voltage contact limit and supplied by listed transformers or power supplies that comply with 680.23(A)(2) shall be permitted to be installed without ground-fault protection. [555.35_(B)_(2)](https://2023.antflix.net#555.35_(B)_(2))", + "displayTitle": "(2) Outlets for Other Than Shore Power", + "children": [], + "url": "https://2023.antflix.net#555.35_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#555.35_(B)" + }, + { + "body": "GFCI protection for personnel shall be provided for outlets not exceeding 240 volts that supply a boat hoist installed at docking facilities. GFCI protected receptacles for other than shore power shall be permitted to supply boat hoists. [555.35_(C)](https://2023.antflix.net#555.35_(C))", + "displayTitle": "(C) Boat Hoists", + "children": [], + "url": "https://2023.antflix.net#555.35_(C)" + }, + { + "body": "Where more than three receptacles supply shore power to boats, a listed leakage current measurement device for use in marina applications shall be available and be used to determine leakage current from each boat that will utilize shore power. The listing requirement for the leakage current measurement device for use in marina applications shall become effective January 1, 2026. Informational Note No. 1: Leakage current measurement will provide the capability to determine when an individual boat has defective wiring or other problems contributing to hazardous voltage and current. The use of a test device will allow the facility operator to identify a boat that is creating problems. In some cases a single boat could cause an upstream GFPE device protecting a feeder to operate even though multiple boats are supplied from the same feeder. The use of a test device will help the facility operator prevent a particular boat from contributing to hazardous voltage and current in the marina area. Informational Note No. 2: An annual test of each boat with the leakage current measurement device is a prudent step toward determining if a boat has defective wiring that could be contributing hazardous voltage and current. Where the leakage current measurement device reveals that a boat is contributing hazardous voltage and current, repairs should be made to the boat before it is permitted to utilize shore power. Exception: Where the shore power equipment includes a leakage indicator and leakage alarm, a separate leakage test device shall not be required. [555.35_(D)](https://2023.antflix.net#555.35_(D))", + "displayTitle": "(D) Leakage Current Measurement Device", + "children": [], + "url": "https://2023.antflix.net#555.35_(D)" + } + ], + "url": "https://2023.antflix.net#555.35" + }, + { + "body": "Disconnecting means shall be provided to isolate each boat from its supply connection(s). [555.36](https://2023.antflix.net#555.36)", + "displayTitle": "555.36 Disconnecting Means for Shore Power Connection(s)", + "children": [ + { + "body": "The disconnecting means shall consist of a circuit breaker, switch, or both, and shall be properly identified as to which receptacle it controls. [555.36_(A)](https://2023.antflix.net#555.36_(A))", + "displayTitle": "(A) Type", + "children": [], + "url": "https://2023.antflix.net#555.36_(A)" + }, + { + "body": "The disconnecting means shall be readily accessible, located not more than 762 mm (30 in.) from the receptacle it controls, and located in the supply circuit ahead of the receptacle. Circuit breakers or switches located in marina power outlets complying with this section shall be permitted as the disconnecting means. [555.36_(B)](https://2023.antflix.net#555.36_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#555.36_(B)" + }, + { + "body": "Each marina power outlet or enclosure that provides shore power to boats shall be provided with a listed emergency shutoff device or electrical disconnect that is clearly marked \"Emergency Shutoff\" in accordance with 110.22(A). The emergency shutoff device or electrical disconnect shall be within sight of the marina power outlet or other enclosure that provides shore power to boats, readily accessible, externally operable, manually resettable, and listed for use in wet locations. The emergency shutoff device or electrical disconnect shall de-energize the power supply to all circuits supplied by the marina power outlet(s) or enclosure(s) that provide shore power to boats. A circuit breaker handle shall not be used for this purpose. [555.36_(C)](https://2023.antflix.net#555.36_(C))", + "displayTitle": "(C) Emergency Electrical Disconnect", + "children": [], + "url": "https://2023.antflix.net#555.36_(C)" + } + ], + "url": "https://2023.antflix.net#555.36" + }, + { + "displayTitle": "555.37 Equipment Grounding Conductor", + "children": [ + { + "body": "The following items shall be connected to an equipment grounding conductor run with the circuit conductors in the same raceway, cable, or trench: Metal boxes, metal cabinets, and all other metal enclosuresMetal frames of utilization equipmentGrounding terminals of grounding-type receptacles [555.37_(A)](https://2023.antflix.net#555.37_(A))", + "displayTitle": "(A) Equipment to Be Connected to Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#555.37_(A)" + }, + { + "body": "An equipment grounding conductor shall be of the wire-type, insulated, and sized in accordance with 250.122 but not smaller than 12 AWG. [555.37_(B)](https://2023.antflix.net#555.37_(B))", + "displayTitle": "(B) Type of Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#555.37_(B)" + }, + { + "body": "Where a feeder supplies a remote panelboard or other distribution equipment, an insulated equipment grounding conductor shall extend from a grounding terminal in the service to a grounding terminal and busbar in the remote panelboard or other distribution equipment. [555.37_(C)](https://2023.antflix.net#555.37_(C))", + "displayTitle": "(C) Feeder Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#555.37_(C)" + }, + { + "body": "The insulated equipment grounding conductor for branch circuits shall terminate at a grounding terminal in a remote panelboard, in other distribution equipment, or in the main service equipment. [555.37_(D)](https://2023.antflix.net#555.37_(D))", + "displayTitle": "(D) Branch-Circuit Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#555.37_(D)" + }, + { + "body": "Unless double-insulated, cord-and-plug-connected appliances shall be grounded by means of an equipment grounding conductor in the cord and a grounding-type attachment plug. Exception: An equipment grounding conductor shall be permitted to be uninsulated if a part of a listed cable assembly identified for the environment and not subject to atmospheres or environments such as, but not limited to, storm water basins, sewage treatment ponds, and natural bodies of water containing salt water. [555.37_(E)](https://2023.antflix.net#555.37_(E))", + "displayTitle": "(E) Cord-and-Plug-Connected Appliances", + "children": [], + "url": "https://2023.antflix.net#555.37_(E)" + } + ], + "url": "https://2023.antflix.net#555.37" + }, + { + "displayTitle": "555.38 Luminaires", + "children": [ + { + "body": "All luminaires and retrofit kits shall be listed and identified for use in their intended environment. Luminaires and their supply connections shall be secured to structural elements of the marina to limit damage from watercraft and prevent entanglement of and interaction with sea life. [555.38_(A)](https://2023.antflix.net#555.38_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#555.38_(A)" + }, + { + "body": "Luminaires installed below the highest high tide level or electrical datum plane and likely to be periodically submersed shall be limited to those luminaires that comply with the following: Identified as submersibleOperate below the low-voltage contact limit defined in Article 100Supplied by an isolating transformer or power supply in accordance with 680.23(A)(2) [555.38_(B)](https://2023.antflix.net#555.38_(B))", + "displayTitle": "(B) Underwater Luminaires", + "children": [], + "url": "https://2023.antflix.net#555.38_(B)" + } + ], + "url": "https://2023.antflix.net#555.38" + }, + { + "displayTitle": "Part III Floating Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_79_III" + }, + { + "body": "One set of service conductors shall be permitted to serve more than one set of service equipment. [555.50](https://2023.antflix.net#555.50)", + "displayTitle": "555.50 Service Conductors", + "children": [], + "url": "https://2023.antflix.net#555.50" + }, + { + "body": "Each floating building shall be supplied by a single set of feeder conductors from its service equipment. Exception: Where the floating building has multiple occupancy, each occupant shall be permitted to be supplied by a single set of feeder conductors extended from the occupant's service equipment to the occupant's panelboard. [555.51](https://2023.antflix.net#555.51)", + "displayTitle": "555.51 Feeder Conductors", + "children": [], + "url": "https://2023.antflix.net#555.51" + }, + { + "displayTitle": "555.52 Installation of Services and Feeders", + "children": [ + { + "body": "Flexibility of the wiring system shall be maintained between floating buildings and the supply conductors. All wiring shall be installed so that motion of the water surface and changes in the water level will not result in unsafe conditions. [555.52_(A)](https://2023.antflix.net#555.52_(A))", + "displayTitle": "(A) Flexibility", + "children": [], + "url": "https://2023.antflix.net#555.52_(A)" + }, + { + "body": "Liquidtight flexible metal conduit or liquidtight flexible nonmetallic conduit with approved fittings shall be permitted for feeders and where flexible connections are required for services. Extra-hard usage portable power cable listed for both wet locations and sunlight resistance shall be permitted for a feeder to a floating building where flexibility is required. Other raceways suitable for the location shall be permitted to be installed where flexibility is not required. [555.52_(B)](https://2023.antflix.net#555.52_(B))", + "displayTitle": "(B) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#555.52_(B)" + } + ], + "url": "https://2023.antflix.net#555.52" + }, + { + "body": "The main overcurrent protective device that feeds the floating building shall have ground-fault protection not exceeding 100 mA. Ground-fault protection of each individual branch or feeder circuit shall be permitted as a suitable alternative. Outdoor outlets, shore power outlets, and boat hoists located at floating buildings shall comply with 555.35(B) and (C). [555.53](https://2023.antflix.net#555.53)", + "displayTitle": "555.53 Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#555.53" + }, + { + "body": "Grounding at floating buildings shall comply with 555.54(A) through (D). [555.54](https://2023.antflix.net#555.54)", + "displayTitle": "555.54 Grounding", + "children": [ + { + "body": "Grounding of both electrical and nonelectrical parts in a floating building shall be through connection to a grounding bus in the building panelboard. [555.54_(A)](https://2023.antflix.net#555.54_(A))", + "displayTitle": "(A) Grounding of Electrical and Nonelectrical Parts", + "children": [], + "url": "https://2023.antflix.net#555.54_(A)" + }, + { + "body": "The equipment grounding conductor shall be installed with the feeder conductors and connected to a grounding terminal in the service equipment. [555.54_(B)](https://2023.antflix.net#555.54_(B))", + "displayTitle": "(B) Installation and Connection of Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#555.54_(B)" + }, + { + "body": "The equipment grounding conductor shall be an insulated copper conductor with a continuous outer finish that is either green or green with one or more yellow stripes. For conductors larger than 6 AWG, or where multiconductor cables are used, re-identification of conductors allowed in 250.119(B)(2)b. and (B)(2)c. shall be permitted. [555.54_(C)](https://2023.antflix.net#555.54_(C))", + "displayTitle": "(C) Identification of Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#555.54_(C)" + }, + { + "body": "The grounding terminal in the service equipment shall be grounded by connection through an insulated grounding electrode conductor to a grounding electrode on shore. [555.54_(D)](https://2023.antflix.net#555.54_(D))", + "displayTitle": "(D) Grounding Electrode Conductor Connection", + "children": [], + "url": "https://2023.antflix.net#555.54_(D)" + } + ], + "url": "https://2023.antflix.net#555.54" + }, + { + "body": "The grounded circuit conductor (neutral) shall be an insulated conductor identified in compliance with 200.6. The neutral conductor shall be connected to the equipment grounding terminal in the service equipment, and, except for that connection, it shall be insulated from the equipment grounding conductors, equipment enclosures, and all other grounded parts. The neutral conductor terminals in the panelboard and in ranges, clothes dryers, counter-mounted cooking units, and the like shall be insulated from the enclosures. [555.55](https://2023.antflix.net#555.55)", + "displayTitle": "555.55 Insulated Neutral", + "children": [], + "url": "https://2023.antflix.net#555.55" + }, + { + "displayTitle": "555.56 Equipment Grounding", + "children": [ + { + "body": "All enclosures and exposed metal parts of electrical systems shall be connected to the grounding bus. [555.56_(A)](https://2023.antflix.net#555.56_(A))", + "displayTitle": "(A) Electrical Systems", + "children": [], + "url": "https://2023.antflix.net#555.56_(A)" + }, + { + "body": "Where required to be grounded, cord-connected appliances shall be grounded by means of an equipment grounding conductor in the cord and a grounding-type attachment plug. [555.56_(B)](https://2023.antflix.net#555.56_(B))", + "displayTitle": "(B) Cord-Connected Appliances", + "children": [], + "url": "https://2023.antflix.net#555.56_(B)" + } + ], + "url": "https://2023.antflix.net#555.56" + } + ], + "url": "https://2023.antflix.net#555" + }, + { + "displayTitle": "Article 590 Temporary Installations", + "children": [ + { + "body": "The provisions of this article apply to temporary electric power and lighting installations. [590.1](https://2023.antflix.net#590.1)", + "displayTitle": "590.1 Scope", + "children": [], + "url": "https://2023.antflix.net#590.1" + }, + { + "displayTitle": "590.2 All Wiring Installations", + "children": [ + { + "body": "Except as specifically modified in this article, all other requirements of this Code for permanent wiring shall apply to temporary wiring installations. [590.2_(A)](https://2023.antflix.net#590.2_(A))", + "displayTitle": "(A) Other Articles", + "children": [], + "url": "https://2023.antflix.net#590.2_(A)" + }, + { + "body": "Temporary wiring methods shall be acceptable only if approved based on the conditions of use and any special requirements of the temporary installation. [590.2_(B)](https://2023.antflix.net#590.2_(B))", + "displayTitle": "(B) Approval", + "children": [], + "url": "https://2023.antflix.net#590.2_(B)" + } + ], + "url": "https://2023.antflix.net#590.2" + }, + { + "displayTitle": "590.3 Time Constraints", + "children": [ + { + "body": "Temporary electric power and lighting installations shall be permitted during the period of construction, remodeling, maintenance, repair, or demolition of buildings, structures, equipment, or similar activities. [590.3_(A)](https://2023.antflix.net#590.3_(A))", + "displayTitle": "(A) During the Period of Construction", + "children": [], + "url": "https://2023.antflix.net#590.3_(A)" + }, + { + "body": "Temporary electric power and lighting installations shall be permitted for a period not to exceed 90 days for holiday decorative lighting and similar purposes. [590.3_(B)](https://2023.antflix.net#590.3_(B))", + "displayTitle": "(B) 90 Days", + "children": [], + "url": "https://2023.antflix.net#590.3_(B)" + }, + { + "body": "Temporary electric power and lighting installations shall be permitted during emergencies and for tests, experiments, and developmental work. [590.3_(C)](https://2023.antflix.net#590.3_(C))", + "displayTitle": "(C) Emergencies and Tests", + "children": [], + "url": "https://2023.antflix.net#590.3_(C)" + }, + { + "body": "Temporary wiring shall be removed immediately upon completion of construction or purpose for which the wiring was installed. [590.3_(D)](https://2023.antflix.net#590.3_(D))", + "displayTitle": "(D) Removal", + "children": [], + "url": "https://2023.antflix.net#590.3_(D)" + } + ], + "url": "https://2023.antflix.net#590.3" + }, + { + "displayTitle": "590.4 General", + "children": [ + { + "body": "Services shall be installed in conformance with Parts I through VIII of Article 230, as applicable. [590.4_(A)](https://2023.antflix.net#590.4_(A))", + "displayTitle": "(A) Services", + "children": [], + "url": "https://2023.antflix.net#590.4_(A)" + }, + { + "body": "Overcurrent protection shall be provided in accordance with 240.4, 240.5, 245.26, 445.12, and 445.13. Conductors shall be permitted within cable assemblies or within multiconductor cords or cables of a type identified in Table 400.4 for hard usage or extra-hard usage. For the purpose of this section, the following wiring methods shall be permitted: Type NM, Type NMC, and Type SE cables shall be permitted to be used in any dwelling, building, or structure without any height limitation or limitation by building construction type and without concealment within walls, floors, or ceilings.Type SE cable shall be permitted to be installed in a raceway in an underground installation.Exception: Single insulated conductors shall be permitted where installed for the purpose(s) specified in 590.3(C) and accessible only to qualified persons. [590.4_(B)](https://2023.antflix.net#590.4_(B))", + "displayTitle": "(B) Feeders", + "children": [], + "url": "https://2023.antflix.net#590.4_(B)" + }, + { + "body": "All branch circuits shall originate in an approved power outlet, switchgear, switchboard or panelboard, motor control center, or fused switch enclosure. Conductors shall be permitted within cable assemblies or within multiconductor cord or cable of a type identified in Table 400.4 for hard usage or extra-hard usage. Conductors shall be protected from overcurrent as provided in 240.4, 240.5, and 245.26. For the purposes of this section, the following wiring methods shall be permitted: Type NM, Type NMC, and Type SE cables shall be permitted to be used in any dwelling, building, or structure without any height limitation or limitation by building construction type and without concealment within walls, floors, or ceilings.Type SE cable shall be permitted to be installed in a raceway in an underground installation.Exception: Branch circuits installed for the purposes specified in 590.3(B) or 590.3(C) shall be permitted to be run as single insulated conductors. Where the wiring is installed in accordance with 590.3(B), the voltage to ground shall not exceed 150 volts, the wiring shall not be subject to physical damage, and the conductors shall be supported on insulators at intervals of not more than 3.0 m (10 ft); or, for festoon lighting, the conductors shall be so arranged that excessive strain is not transmitted to the lampholders. [590.4_(C)](https://2023.antflix.net#590.4_(C))", + "displayTitle": "(C) Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#590.4_(C)" + }, + { + "displayTitle": "(D) Receptacles", + "children": [ + { + "body": "All receptacles shall be of the grounding type. Unless installed in a continuous metal raceway that qualifies as an equipment grounding conductor in accordance with 250.118 or a continuous metal-covered cable that qualifies as an equipment grounding conductor in accordance with 250.118, all branch circuits shall include a separate equipment grounding conductor, and all receptacles shall be electrically connected to the equipment grounding conductor(s). Receptacles on construction sites shall not be installed on any branch circuit that supplies temporary lighting. [590.4_(D)_(1)](https://2023.antflix.net#590.4_(D)_(1))", + "displayTitle": "(1) All Receptacles", + "children": [], + "url": "https://2023.antflix.net#590.4_(D)_(1)" + }, + { + "body": "All 15- and 20-ampere, 125- and 250-volt receptacles installed in a wet location shall comply with 406.9(B)(1). [590.4_(D)_(2)](https://2023.antflix.net#590.4_(D)_(2))", + "displayTitle": "(2) Receptacles in Wet Locations", + "children": [], + "url": "https://2023.antflix.net#590.4_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#590.4_(D)" + }, + { + "body": "Suitable disconnecting switches or plug connectors shall be installed to permit the disconnection of all ungrounded conductors of each temporary circuit. Multi-wire branch circuits shall be provided with a means to disconnect simultaneously all ungrounded conductors at the power outlet or panelboard where the branch circuit originated. Identified handle ties shall be permitted. [590.4_(E)](https://2023.antflix.net#590.4_(E))", + "displayTitle": "(E) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#590.4_(E)" + }, + { + "body": "All lamps for general illumination shall be protected from accidental contact or breakage by a suitable luminaire or lampholder with a guard. Metal guarded sockets shall not be used unless the metal guard is connected to the circuit equipment grounding conductor. [590.4_(F)](https://2023.antflix.net#590.4_(F))", + "displayTitle": "(F) Lamp Protection", + "children": [], + "url": "https://2023.antflix.net#590.4_(F)" + }, + { + "body": "A box, conduit body, or other enclosure, with a cover installed, shall be required for all splices. Exception No. 1: On construction sites, a box, conduit body, or other enclosure shall not be required for either of the following conditions: (1) The circuit conductors being spliced are all from nonmetallic multiconductor cord or cable assemblies, provided that the equipment grounding continuity is maintained with or without the box. (2) The circuit conductors being spliced, are all from metal-sheathed cable assemblies terminated in listed fittings that mechanically secure the cable sheath to maintain effective electrical continuity. Exception No. 2: On construction sites, branch-circuits that are permanently installed in framed walls and ceilings and are used to supply temporary power or lighting, and that are GFCI protected, the following shall be permitted: (1) A box cover shall not be required for splices installed completely inside of junction boxes with plaster rings. (2) Listed pigtail-type lampholders shall be permitted to be installed in ceiling-mounted junction boxes with plaster rings. (3) Finger safe devices shall be permitted for supplying and connection of devices. [590.4_(G)](https://2023.antflix.net#590.4_(G))", + "displayTitle": "(G) Splices", + "children": [], + "url": "https://2023.antflix.net#590.4_(G)" + }, + { + "body": "Flexible cords and cables shall be protected from accidental damage. Sharp corners and projections shall be avoided. Where passing through doorways or other pinch points, protection shall be provided to avoid damage. [590.4_(H)](https://2023.antflix.net#590.4_(H))", + "displayTitle": "(H) Protection From Accidental Damage", + "children": [], + "url": "https://2023.antflix.net#590.4_(H)" + }, + { + "body": "Flexible cords and cables entering enclosures containing devices requiring termination shall be secured to the box with fittings listed for connecting flexible cords and cables to boxes designed for the purpose. [590.4_(I)](https://2023.antflix.net#590.4_(I))", + "displayTitle": "(I) Termination(s) at Devices", + "children": [], + "url": "https://2023.antflix.net#590.4_(I)" + }, + { + "body": "Cable assemblies and flexible cords and cables shall be supported in place at intervals that ensure that they will be protected from physical damage. Support shall be in the form of staples, cable ties, straps, or similar type fittings installed so as not to cause damage. Cable assemblies and flexible cords and cables installed as branch circuits or feeders shall not be installed on the floor or on the ground. Extension cords shall not be required to comply with 590.4(J). Vegetation shall not be used for support of overhead spans of branch circuits or feeders. Exception: For holiday lighting in accordance with 590.3(B), where the conductors or cables are arranged with strain relief devices, tension take-up devices, or other approved means to avoid damage from the movement of the live vegetation, trees shall be permitted to be used for support of overhead spans of branch-circuit conductors or cables. [590.4_(J)](https://2023.antflix.net#590.4_(J))", + "displayTitle": "(J) Support", + "children": [], + "url": "https://2023.antflix.net#590.4_(J)" + } + ], + "url": "https://2023.antflix.net#590.4" + }, + { + "body": "Decorative lighting used for holiday lighting and similar purposes, in accordance with 590.3(B), shall be listed and shall be labeled on the product. [590.5](https://2023.antflix.net#590.5)", + "displayTitle": "590.5 Listing of Decorative Lighting", + "children": [], + "url": "https://2023.antflix.net#590.5" + }, + { + "body": "Ground-fault protection for personnel for all temporary wiring installations shall be provided to comply with 590.6(A) and (B). This section shall apply only to temporary wiring installations used to supply temporary power to equipment used by personnel during construction, remodeling, maintenance, repair, or demolition of buildings, structures, equipment, or similar activities. This section shall apply to power derived from an electric utility company or from an on-site-generated power source. [590.6](https://2023.antflix.net#590.6)", + "displayTitle": "590.6 Ground-Fault Protection for Personnel", + "children": [ + { + "body": "Temporary receptacle installations used to supply temporary power to equipment used by personnel during construction, remodeling, maintenance, repair, or demolition of buildings, structures, equipment, or similar activities shall comply with the requirements of 590.6(A)(1) through (A)(3), as applicable. Exception: In industrial establishments only, where conditions of maintenance and supervision ensure that only qualified personnel are involved, an assured equipment grounding conductor program as specified in 590.6(B)(2) shall be permitted for only those receptacle outlets used to supply equipment that, would create a greater hazard if power were interrupted or having a design that is not compatible with GFCI protection. [590.6_(A)](https://2023.antflix.net#590.6_(A))", + "displayTitle": "(A) Receptacle Outlets", + "children": [ + { + "body": "All 125-volt, single-phase, 15-, 20-, and 30-ampere receptacle outlets that are not a part of the permanent wiring of the building or structure and that are in use by personnel shall have ground-fault circuit-interrupter protection for personnel. In addition to this required ground-fault circuit-interrupter protection for personnel, listed cord sets or devices incorporating listed ground-fault circuit-interrupter protection for personnel identified for portable use shall be permitted. [590.6_(A)_(1)](https://2023.antflix.net#590.6_(A)_(1))", + "displayTitle": "(1) Receptacle Outlets Not Part of Permanent Wiring", + "children": [], + "url": "https://2023.antflix.net#590.6_(A)_(1)" + }, + { + "body": "Ground-fault circuit-interrupter protection for personnel shall be provided for all 125-volt, single-phase, 15-, 20-, and 30-ampere receptacle outlets installed or existing as part of the permanent wiring of the building or structure and used for temporary electric power. Listed cord sets or devices incorporating listed ground-fault circuit-interrupter protection for personnel identified for portable use shall be permitted. [590.6_(A)_(2)](https://2023.antflix.net#590.6_(A)_(2))", + "displayTitle": "(2) Receptacle Outlets Existing or Installed as Permanent Wiring", + "children": [], + "url": "https://2023.antflix.net#590.6_(A)_(2)" + }, + { + "body": "All 125-volt and 125/250-volt, single-phase, 15-, 20-, and 30-ampere receptacle outlets that are a part of a 15-kW or smaller portable generator shall have listed ground-fault circuit-interrupter protection for personnel. All 15- and 20-ampere, 125- and 250-volt receptacles, including those that are part of a portable generator, used in a damp or wet location shall comply with 406.9(A) and (B). Listed cord sets or devices incorporating listed ground-fault circuit-interrupter protection for personnel identified for portable use shall be permitted for use with 15-kW or less portable generators manufactured or remanufactured prior to January 1, 2015. [590.6_(A)_(3)](https://2023.antflix.net#590.6_(A)_(3))", + "displayTitle": "(3) Receptacles on 15-kW or Less Portable Generators", + "children": [], + "url": "https://2023.antflix.net#590.6_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#590.6_(A)" + }, + { + "body": "For temporary wiring installations, receptacles, other than those covered by 590.6(A)(1) through (A)(3) used to supply temporary power to equipment used by personnel during construction, remodeling, maintenance, repair, or demolition of buildings, structures, or equipment, or similar activities, shall have protection in accordance with 590.6(B)(1) or the assured equipment grounding conductor program in accordance with 590.6(B)(2). [590.6_(B)](https://2023.antflix.net#590.6_(B))", + "displayTitle": "(B) Other Receptacle Outlets", + "children": [ + { + "body": "Ground-fault circuit-interrupter protection for personnel. [590.6_(B)_(1)](https://2023.antflix.net#590.6_(B)_(1))", + "displayTitle": "(1) GFCI Protection", + "children": [], + "url": "https://2023.antflix.net#590.6_(B)_(1)" + }, + { + "body": "A written assured equipment grounding conductor program continuously enforced at the site by one or more designated persons to ensure that equipment grounding conductors for all cord sets, receptacles that are not a part of the permanent wiring of the building or structure, and equipment connected by cord and plug are installed and maintained in accordance with the applicable requirements of 250.114, 250.138, 406.4(C), and 590.4(D). The following tests shall be performed on all cord sets, receptacles that are not part of the permanent wiring of the building or structure, and cord-and-plug-connected equipment required to be connected to an equipment grounding conductor:All equipment grounding conductors shall be tested for continuity and shall be electrically continuous.Each receptacle and attachment plug shall be tested for correct attachment of the equipment grounding conductor. The equipment grounding conductor shall be connected to its proper terminal.All required tests shall be performed as follows:Before first use on siteWhen there is evidence of damageBefore equipment is returned to service following any repairsAt intervals not exceeding 3 monthsThe tests required in 590.6(B)(2)(a) shall be recorded and made available to the authority having jurisdiction.The assured equipment grounding conductor program shall be documented and made available to the authority having jurisdiction.Informational Note: See OSHA 29 CFR 1910 and 1926 for requirements for assured equipment grounding conductor programs. See NFPA 70E-2018, Standard for Electrical Safety in the Workplace, for additional information. [590.6_(B)_(2)](https://2023.antflix.net#590.6_(B)_(2))", + "displayTitle": "(2) Assured Equipment Grounding Conductor Program", + "children": [], + "url": "https://2023.antflix.net#590.6_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#590.6_(B)" + } + ], + "url": "https://2023.antflix.net#590.6" + }, + { + "body": "For wiring over 600 volts, nominal, suitable fencing, barriers, or other effective means shall be provided to limit access only to authorized and qualified personnel. [590.7](https://2023.antflix.net#590.7)", + "displayTitle": "590.7 Guarding", + "children": [], + "url": "https://2023.antflix.net#590.7" + }, + { + "displayTitle": "590.8 Overcurrent Protective Devices", + "children": [ + { + "body": "Overcurrent protective devices that have been previously used and are installed in a temporary installation shall be examined to ensure they have been properly installed and properly maintained, and there is no evidence of impending failure. Informational Note: See the following standards for further information for properly maintained equipment:NEMA AB 4, Guidelines for Inspection and Preventive Maintenance of Molded-Case Circuit Breakers Used in Commercial and Industrial ApplicationsNFPA 70B, Recommended Practice for Electrical Equipment MaintenanceNEMA GD 1, Evaluating Water-Damaged Electrical EquipmentIEEE 1458, IEEE Recommended Practice for the Selection, Field Testing, and Life Expectancy of Molded-Case Circuit Breakers for Industrial Applications [590.8_(A)](https://2023.antflix.net#590.8_(A))", + "displayTitle": "(A) Where Reused", + "children": [], + "url": "https://2023.antflix.net#590.8_(A)" + }, + { + "body": "Overcurrent protective devices for solidly grounded wye electrical services of more than 150 volts to ground but not exceeding 1000 volts phase-to-phase, available fault current greater than 10,000 amperes, shall be current limiting. [590.8_(B)](https://2023.antflix.net#590.8_(B))", + "displayTitle": "(B) Service Overcurrent Protective Devices", + "children": [], + "url": "https://2023.antflix.net#590.8_(B)" + } + ], + "url": "https://2023.antflix.net#590.8" + } + ], + "url": "https://2023.antflix.net#590" + } + ], + "url": "https://2023.antflix.net#5" + } + ], + "Chapter 6 Special Equipment": [ + { + "displayTitle": "Chapter 6 Special Equipment", + "Article": [ + { + "displayTitle": "Article 600 Electric Signs and Outline Lighting", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_90_I" + }, + { + "body": "This article covers the installation of conductors, equipment, and field wiring for electric signs, retrofit kits, and outline lighting, regardless of voltage. All installations and equipment using neon tubing, such as signs, decorative elements, skeleton tubing, or art forms, are covered by this article. Informational Note: Sign and outline lighting illumination systems include, but are not limited to, cold cathode neon tubing, high-intensity discharge lamps (HID), fluorescent or incandescent lamps, light-emitting diodes (LEDs), and electroluminescent and inductance lighting.", + "displayTitle": "600.1 Scope", + "children": [], + "url": "https://2023.antflix.net#600.1" + }, + { + "body": "Fixed, mobile, or portable electric signs, section signs, outline lighting, photovoltaic (PV) powered signs, and retrofit kits, regardless of voltage, shall be listed and labeled, provided with installation instructions, and installed in conformance with that listing, unless otherwise approved by special permission.", + "displayTitle": "600.3 Listing", + "children": [ + { + "body": "Field-installed skeleton tubing shall not be required to be listed where installed in conformance with this Code.", + "displayTitle": "(A) Field-Installed Skeleton Tubing", + "children": [], + "url": "https://2023.antflix.net#600.3_(A)" + }, + { + "body": "Outline lighting shall not be required to be listed as a system when it consists of listed luminaires wired in accordance with Chapter 3.", + "displayTitle": "(B) Outline Lighting", + "children": [], + "url": "https://2023.antflix.net#600.3_(B)" + } + ], + "url": "https://2023.antflix.net#600.3" + }, + { + "displayTitle": "600.4 Markings", + "children": [ + { + "body": "Signs and outline lighting systems shall be listed and labeled; marked with the manufacturer's name, trademark, or other means of identification; and input voltage and current rating.", + "displayTitle": "(A) Signs and Outline Lighting Systems", + "children": [], + "url": "https://2023.antflix.net#600.4_(A)" + }, + { + "body": "Signs with a retrofitted illumination system shall contain the following: The sign shall be marked that the illumination system has been replaced.The marking shall include the kit providers and installer's name, logo, or unique identifier.Signs equipped with tubular light-emitting diode lamps powered by the existing sign sockets shall include a label alerting the service personnel that the sign has been modified. The label shall meet the requirements of 110.21(B). The label shall also include a warning not to install fluorescent lamps and shall also be visible during relamping.", + "displayTitle": "(B) Signs With a Retrofitted Illumination System", + "children": [], + "url": "https://2023.antflix.net#600.4_(B)" + }, + { + "body": "Signs and outline lighting systems with lampholders for incandescent lamps shall be marked to indicate the maximum allowable lamp wattage per lampholder. The markings shall be permanently installed, in letters at least 6 mm (1/4 in.) high, and shall be located where visible during relamping.", + "displayTitle": "(C) Signs With Lampholders for Incandescent Lamps", + "children": [], + "url": "https://2023.antflix.net#600.4_(C)" + }, + { + "body": "The markings required in 600.4(A) and listing labels shall be visible after installation and shall be permanently applied in a location visible prior to servicing. The marking shall be permitted to be installed in a location not viewed by the public.", + "displayTitle": "(D) Visibility", + "children": [], + "url": "https://2023.antflix.net#600.4_(D)" + }, + { + "body": "All signs, outline lighting, skeleton tubing systems, and retrofit kits shall be marked to indicate that field wiring and installation instructions are required. Exception: Portable, cord-connected signs are not required to be marked.", + "displayTitle": "(E) Installation Instructions", + "children": [], + "url": "https://2023.antflix.net#600.4_(E)" + } + ], + "url": "https://2023.antflix.net#600.4" + }, + { + "displayTitle": "600.5 Branch Circuits", + "children": [ + { + "body": "Each commercial building and each commercial occupancy accessible to pedestrians shall be provided with at least one outlet in an accessible location at each entrance to each tenant space for sign or outline lighting system use. The outlet(s) shall be supplied by a branch circuit rated at least 20 amperes that supplies no other load. Exception No. 1: A sign or outline lighting outlet shall not be required at entrances for deliveries, service corridors, or service hallways that are intended to be used only by service personnel or employees. Exception No. 2: The required branch circuit shall be permitted to supply loads directly related to the control of the sign such as electronic or electromechanical controllers.", + "displayTitle": "(A) Required Branch Circuit", + "children": [], + "url": "https://2023.antflix.net#600.5_(A)" + }, + { + "body": "A disconnecting means for a sign, outline lighting system, or controller shall be marked to identify the sign, outline lighting system, or controller it controls. Exception: An external disconnecting means that is mounted on the sign body, sign enclosure, sign pole, or controller shall not be required to identify the sign or outline lighting system it controls.", + "displayTitle": "(B) Marking", + "children": [], + "url": "https://2023.antflix.net#600.5_(B)" + }, + { + "body": "Branch circuits that supply signs shall be rated in accordance with 600.5(C)(1) or (C)(2) and shall be considered to be continuous loads for the purposes of calculations.", + "displayTitle": "(C) Rating", + "children": [ + { + "body": "Branch circuits that supply neon tubing installations shall not be rated in excess of 30 amperes.", + "displayTitle": "(1) Neon Signs", + "children": [], + "url": "https://2023.antflix.net#600.5_(C)_(1)" + }, + { + "body": "Branch circuits that supply all other signs and outline lighting systems shall be rated not to exceed 20 amperes.", + "displayTitle": "(2) All Other Signs", + "children": [], + "url": "https://2023.antflix.net#600.5_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#600.5_(C)" + }, + { + "body": "Wiring methods used to supply signs shall comply with 600.5(D)(1), (D)(2), and (D)(3).", + "displayTitle": "(D) Wiring Methods", + "children": [ + { + "body": "The wiring method used to supply signs and outline lighting systems shall terminate within a sign, an outline lighting system enclosure, a suitable box, a conduit body, or panelboard.", + "displayTitle": "(1) Supply", + "children": [], + "url": "https://2023.antflix.net#600.5_(D)_(1)" + }, + { + "body": "Listed and labeled electrical enclosures integral to the sign shall be permitted to be used for voltages up to 600 volts as pull or junction boxes for conductors supplying the following:Other adjacent signsOutline lighting systemsFloodlights that are part of a signThe enclosures in 600.5(D)(2)(a) shall be permitted to contain both branch and secondary circuit conductors.Listed and labeled neon transformer boxes shall be permitted to contain multiple voltages over 1000 volts. A disconnecting means shall be provided to de-energize all ungrounded conductors in the enclosures.", + "displayTitle": "(2) Enclosures as Pull Boxes", + "children": [], + "url": "https://2023.antflix.net#600.5_(D)_(2)" + }, + { + "body": "Metal or nonmetallic poles used to support signs shall be permitted to enclose supply conductors.", + "displayTitle": "(3) Metal or Nonmetallic Poles", + "children": [], + "url": "https://2023.antflix.net#600.5_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#600.5_(D)" + } + ], + "url": "https://2023.antflix.net#600.5" + }, + { + "body": "Each sign and outline lighting system, feeder conductors, or branch circuits supplying a sign, outline lighting system, or skeleton tubing shall be controlled by an externally operable switch or circuit breaker that opens all ungrounded conductors and controls no other load. Signs and outline lighting systems located within fountains shall have the disconnect located in accordance with 680.13. Exception No. 1: A disconnecting means shall not be required for an exit directional sign located within a building. Exception No. 2: A disconnecting means shall not be required for cord-connected signs with an attachment plug. Informational Note: The location of the disconnect is intended to allow service or maintenance personnel and first responders complete and local control of the disconnecting means.", + "displayTitle": "600.6 Disconnects", + "children": [ + { + "body": "The disconnecting means shall be accessible and located in accordance with 600.6(A)(1), 600.6(A)(2), or 600.6(A)(3). If the disconnecting means is remote from the sign it controls, it shall comply with 600.6(A)(4).", + "displayTitle": "(A) Location", + "children": [ + { + "body": "The disconnect shall be located at the point the feeder circuit or branch circuits supplying a sign or outline lighting system enters a sign enclosure, a sign body, or a pole in accordance with 600.5(D)(3). The disconnect shall open all ungrounded conductors where it enters the enclosure of the sign or pole. Exception No. 1: A disconnect shall not be required for branch circuits or feeder conductors passing through the sign where not accessible and enclosed in a Chapter 3 listed raceway or metal-jacketed cable identified for the location. Exception No. 2: A disconnect shall not be required at the point of entry to a sign enclosure or sign body for branch circuits or feeder conductors that supply an internal panelboards in a sign enclosure or sign body. The conductors shall be enclosed where not accessible in a Chapter 3 listed raceway or metal-jacketed cable identified for the location. A field-applied permanent hazard label that is visible during servicing shall be applied to the raceway at or near the point of entry into the sign enclosure or sign body. The danger label shall stale the following: \"Danger. This raceway contains energized conductors.\" The marking shall include the location of the disconnecting means for the energized conductors. The disconnecting means shall be capable of being locked in the open position.", + "displayTitle": "(1) At Point of Entry to a Sign", + "children": [], + "url": "https://2023.antflix.net#600.6_(A)_(1)" + }, + { + "body": "The disconnecting means shall be within sight of the sign or outline lighting system that it controls. Where the disconnecting means is out of the line of sight from any section that is able to be energized, the disconnecting means shall be lockable in accordance with 110.25. A permanent field-applied marking identifying the location of the disconnecting means shall be applied to the sign in a location visible during servicing.", + "displayTitle": "(2) Within Sight of the Sign", + "children": [], + "url": "https://2023.antflix.net#600.6_(A)_(2)" + }, + { + "body": "The following shall apply for signs or outline lighting systems operated by electronic or electromechanical controllers located external to the sign or outline lighting system: The disconnecting means shall be located within sight of the controller or in the same enclosure with the controller.The disconnecting means shall disconnect the sign or outline lighting system and the controller from all ungrounded supply conductors.The disconnecting means shall be designed such that no pole can be operated independently and shall be lockable in accordance with 110.25.Exception: Where the disconnecting means is not located within sight of the controller, a permanent field-applied marking identifying the location of the disconnecting means shall be applied to the controller in a location visible during servicing.", + "displayTitle": "(3) Within Sight of the Controller", + "children": [], + "url": "https://2023.antflix.net#600.6_(A)_(3)" + }, + { + "body": "The disconnecting means, if located remote from the sign, sign body, or pole, shall be mounted at an accessible location available to first responders and service personnel. The location of the disconnect shall be marked with a label at the sign location and marked as the disconnect for the sign or outline lighting system.", + "displayTitle": "(4) Remote Location", + "children": [], + "url": "https://2023.antflix.net#600.6_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#600.6_(A)" + }, + { + "body": "Switches, flashers, and similar devices controlling transformers and electronic power supplies shall be rated for controlling inductive loads or have a current rating not less than twice the current rating of the transformer or the electronic power supply.", + "displayTitle": "(B) Control Switch Rating", + "children": [], + "url": "https://2023.antflix.net#600.6_(B)" + } + ], + "url": "https://2023.antflix.net#600.6" + }, + { + "displayTitle": "600.7 Grounding and Bonding", + "children": [ + { + "displayTitle": "(A) Grounding", + "children": [ + { + "body": "Metal equipment of signs, outline lighting, and skeleton tubing systems shall be grounded by connection to the equipment grounding conductor of the supply branch circuit(s) or feeder using the types of equipment grounding conductors specified in 250.118. Exception: Portable cord-connected signs shall not be required to be connected to the equipment grounding conductor where protected by a system of double insulation or its equivalent. Double insulated equipment shall be distinctively marked.", + "displayTitle": "(1) Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#600.7_(A)_(1)" + }, + { + "body": "The equipment grounding conductor size shall be in accordance with 250.122.", + "displayTitle": "(2) Size of Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#600.7_(A)_(2)" + }, + { + "body": "Equipment grounding conductor connections shall be made in accordance with 250.130 and in a method specified in 250.8.", + "displayTitle": "(3) Connections of Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#600.7_(A)_(3)" + }, + { + "body": "Auxiliary grounding electrode(s) shall be permitted for electric signs and outline lighting systems covered by this article and shall meet the requirements of 250.54.", + "displayTitle": "(4) Auxiliary Grounding Electrode", + "children": [], + "url": "https://2023.antflix.net#600.7_(A)_(4)" + }, + { + "body": "Metal parts of a building shall not be permitted as a secondary return conductor or an equipment grounding conductor.", + "displayTitle": "(5) Metal Building Parts", + "children": [], + "url": "https://2023.antflix.net#600.7_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#600.7_(A)" + }, + { + "displayTitle": "(B) Bonding", + "children": [ + { + "body": "Metal parts and equipment of signs and outline lighting systems shall be bonded together and to the associated transformer or power-supply equipment grounding conductor of the branch circuit or feeder supplying the sign or outline lighting system and shall meet the requirements of 250.90. Exception: Remote metal parts of a section sign or outline lighting system only supplied by a remote Class 2 power supply shall not be required to be bonded to an equipment grounding conductor.", + "displayTitle": "(1) Bonding of Metal Parts", + "children": [], + "url": "https://2023.antflix.net#600.7_(B)_(1)" + }, + { + "body": "Bonding connections shall be made in accordance with 250.8.", + "displayTitle": "(2) Bonding Connections", + "children": [], + "url": "https://2023.antflix.net#600.7_(B)_(2)" + }, + { + "body": "Metal parts of a building shall not be used as a means for bonding metal parts and equipment of signs or outline lighting systems together or to the transformer or power-supply equipment grounding conductor of the supply circuit.", + "displayTitle": "(3) Metal Building Parts", + "children": [], + "url": "https://2023.antflix.net#600.7_(B)_(3)" + }, + { + "body": "Listed flexible metal conduit or listed liquidtight flexible metal conduit that encloses the secondary circuit conductor from a transformer or power supply for use with neon tubing shall be permitted as a bonding means if the total accumulative length of the conduit in the secondary circuit does not exceed 30 m (100 ft).", + "displayTitle": "(4) Flexible Metal Conduit Length", + "children": [], + "url": "https://2023.antflix.net#600.7_(B)_(4)" + }, + { + "body": "Small metal parts not exceeding 50 mm (2 in.) in any dimension, not likely to be energized, and spaced at least 19 mm (3/4 in.) from neon tubing shall not require bonding.", + "displayTitle": "(5) Small Metal Parts", + "children": [], + "url": "https://2023.antflix.net#600.7_(B)_(5)" + }, + { + "body": "Where listed nonmetallic conduit is used to enclose the secondary circuit conductor from a transformer or power supply and a bonding conductor is required, the bonding conductor shall be installed separate and remote from the nonmetallic conduit and be spaced at least 38 mm (11/2 in.) from the conduit when the circuit is operated at 100 Hz or less or 45 mm (13/4 in.) when the circuit is operated at over 100 Hz.", + "displayTitle": "(6) Nonmetallic Conduit", + "children": [], + "url": "https://2023.antflix.net#600.7_(B)_(6)" + }, + { + "body": "Bonding conductors installed outside of a sign or raceway shall be protected from physical damage. Bonding conductors shall comply with 250.120 and 250.122. Bonding conductor size shall also comply with one of the following: Bonding conductors shall be copper and not smaller than 14 AWG.Bonding conductors shall be copper-clad aluminum and not smaller than 12 AWG.", + "displayTitle": "(7) Bonding Conductors", + "children": [], + "url": "https://2023.antflix.net#600.7_(B)_(7)" + }, + { + "body": "Signs or outline lighting installed inside a fountain shall have all metal parts bonded to the equipment grounding conductor of the branch circuit for the fountain recirculating system. The bonding connection shall be as near as practicable to the fountain and shall be permitted to be made to metal piping systems that are bonded in accordance with 680.54(B). Informational Note: See 600.32(J) for restrictions on length of high-voltage secondary conductors.", + "displayTitle": "(8) Signs in Fountains", + "children": [], + "url": "https://2023.antflix.net#600.7_(B)_(8)" + } + ], + "url": "https://2023.antflix.net#600.7_(B)" + } + ], + "url": "https://2023.antflix.net#600.7" + }, + { + "body": "Live parts, other than lamps, and neon tubing shall be enclosed. Transformers and power supplies provided with an integral enclosure, including a primary and secondary circuit splice enclosure, shall not require an additional enclosure.", + "displayTitle": "600.8 Enclosures", + "children": [ + { + "body": "Enclosures shall have ample structural strength and rigidity.", + "displayTitle": "(A) Strength", + "children": [], + "url": "https://2023.antflix.net#600.8_(A)" + }, + { + "body": "Sign and outline lighting system enclosures shall be constructed of metal or shall be listed.", + "displayTitle": "(B) Material", + "children": [], + "url": "https://2023.antflix.net#600.8_(B)" + }, + { + "body": "Sheet copper or aluminum shall be at least 0.51 mm (0.020 in.) thick. Sheet steel shall be at least 0.41 mm (0.016 in.) thick.", + "displayTitle": "(C) Minimum Thickness of Enclosure Metal", + "children": [], + "url": "https://2023.antflix.net#600.8_(C)" + }, + { + "body": "Metal parts of equipment shall be protected from corrosion.", + "displayTitle": "(D) Protection of Metal", + "children": [], + "url": "https://2023.antflix.net#600.8_(D)" + } + ], + "url": "https://2023.antflix.net#600.8" + }, + { + "displayTitle": "600.9 Location", + "children": [ + { + "body": "Sign or outline lighting system equipment shall be at least 4.3 m (14 ft) above areas accessible to vehicles unless protected from physical damage.", + "displayTitle": "(A) Vehicles", + "children": [], + "url": "https://2023.antflix.net#600.9_(A)" + }, + { + "body": "Neon tubing, other than listed, dry-location, portable signs, readily accessible to pedestrians shall be protected from physical damage. Informational Note: See 600.41(D) for additional requirements.", + "displayTitle": "(B) Pedestrians", + "children": [], + "url": "https://2023.antflix.net#600.9_(B)" + }, + { + "body": "Signs and outline lighting systems shall be installed so that adjacent combustible materials are not subjected to temperatures in excess of 90\u00b0C (194\u00b0F). The spacing between wood or other combustible materials and an incandescent or HID lamp or lampholder shall not be less than 50 mm (2 in.).", + "displayTitle": "(C) Adjacent to Combustible Materials", + "children": [], + "url": "https://2023.antflix.net#600.9_(C)" + }, + { + "body": "Signs and outline lighting system equipment for wet location use, other than listed watertight type, shall be weatherproof and have drain holes, as necessary, in accordance with the following: Drain holes shall not be larger than 13 mm (1/2 in.) or smaller than 6 mm (1/4 in.).Every low point or isolated section of the equipment shall have at least one drain hole.Drain holes shall be positioned such that there will be no external obstructions.", + "displayTitle": "(D) Wet Location", + "children": [], + "url": "https://2023.antflix.net#600.9_(D)" + } + ], + "url": "https://2023.antflix.net#600.9" + }, + { + "displayTitle": "600.10 Portable or Mobile Signs", + "children": [ + { + "body": "Portable or mobile signs shall be adequately supported and readily movable without the use of tools.", + "displayTitle": "(A) Support", + "children": [], + "url": "https://2023.antflix.net#600.10_(A)" + }, + { + "body": "An attachment plug shall be provided for each portable or mobile sign.", + "displayTitle": "(B) Attachment Plug", + "children": [], + "url": "https://2023.antflix.net#600.10_(B)" + }, + { + "body": "Portable or mobile signs in wet or damp locations shall comply with 600.10(C)(1) and (C)(2).", + "displayTitle": "(C) Wet or Damp Location", + "children": [ + { + "body": "All cords shall be junior hard-service or hard-service types as designated in Table 400.4 and have an equipment grounding conductor.", + "displayTitle": "(1) Cords", + "children": [], + "url": "https://2023.antflix.net#600.10_(C)_(1)" + }, + { + "body": "In addition to the requirements in 210.8, the manufacturer of portable or mobile signs shall provide listed ground-fault circuit-interrupter protection for personnel. The ground-fault circuit interrupter shall be an integral part of the attachment plug or shall be located in the power-supply cord within 300 mm (12 in.) of the attachment plug.", + "displayTitle": "(2) Ground-Fault Circuit Interrupter", + "children": [], + "url": "https://2023.antflix.net#600.10_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#600.10_(C)" + }, + { + "body": "Portable or mobile signs in dry locations shall meet the following: Cords shall be SP-2, SPE-2, SPT-2, or heavier, as designated in Table 400.4.The cord shall not exceed 4.5 m (15 ft) in length.", + "displayTitle": "(D) Dry Location", + "children": [], + "url": "https://2023.antflix.net#600.10_(D)" + } + ], + "url": "https://2023.antflix.net#600.10" + }, + { + "body": "Field-installed secondary circuit wiring for electric signs, retrofit kits, outline lighting systems, skeleton tubing, and photovoltaic (PV) powered sign systems shall be in accordance with their installation instructions and 600.12(A), (B), or (C).", + "displayTitle": "600.12 Field-Installed Secondary Wiring", + "children": [ + { + "body": "Neon and secondary circuit wiring of 1000 volts or less shall comply with 600.31.", + "displayTitle": "(A) 1000 Volts or Less", + "children": [], + "url": "https://2023.antflix.net#600.12_(A)" + }, + { + "body": "Neon secondary circuit wiring of over 1000 volts shall comply with 600.32.", + "displayTitle": "(B) Over 1000 Volts", + "children": [], + "url": "https://2023.antflix.net#600.12_(B)" + }, + { + "body": "Where the installation complies with 600.33 and the power source provides a Class 2 output that complies with 600.24, either of the following wiring methods shall be permitted as determined by the installation instructions and conditions. Wiring methods identified in Chapter 3Class 2 cables complying with Table 600.33(A)(1) and Table 600.33(A)(2)", + "displayTitle": "(C) Class 2", + "children": [], + "url": "https://2023.antflix.net#600.12_(C)" + } + ], + "url": "https://2023.antflix.net#600.12" + }, + { + "body": "Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be of the self-contained type or be enclosed by placement in a listed sign body or listed separate enclosure.", + "displayTitle": "600.21 Ballasts, Transformers, Electronic Power Supplies, and Class 2 Power Sources", + "children": [ + { + "body": "Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be located where accessible and shall be securely fastened in place.", + "displayTitle": "(A) Accessibility", + "children": [], + "url": "https://2023.antflix.net#600.21_(A)" + }, + { + "body": "Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be installed as near to the lamps or neon tubing as practicable to keep the secondary conductors as short as possible.", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#600.21_(B)" + }, + { + "body": "Ballasts, transformers, electronic power supplies, and Class 2 power sources used in wet locations shall be of the weatherproof type or be of the outdoor type and protected from the weather by placement in a sign body or separate enclosure.", + "displayTitle": "(C) Wet Location", + "children": [], + "url": "https://2023.antflix.net#600.21_(C)" + }, + { + "body": "A working space at least 900 mm (3 ft) high \u00d7 900 mm (3 ft) wide \u00d7 900 mm (3 ft) deep shall be provided at each ballast, transformer, electronic power supply, and Class 2 power source or at its enclosure where not installed in a sign.", + "displayTitle": "(D) Working Space", + "children": [], + "url": "https://2023.antflix.net#600.21_(D)" + }, + { + "body": "Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be permitted to be located in attics and soffits, provided there is an access door at least 900 mm \u00d7 562.5 mm (36 in. \u00d7 221/2 in.) and a passageway of at least 900 mm (3 ft) high \u00d7 600 mm (2 ft) wide with a suitable permanent walkway at least 300 mm (12 in.) wide extending from the point of entry to each component. At least one lighting outlet containing a switch or controlled by a wall switch shall be installed in such spaces. At least one point of control shall be at the usual point of entry to these spaces. The lighting outlet shall be provided at or near the equipment requiring servicing.", + "displayTitle": "(E) Attic and Soffit Locations", + "children": [], + "url": "https://2023.antflix.net#600.21_(E)" + }, + { + "body": "Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be permitted to be located above suspended ceilings, provided that their enclosures are securely fastened in place and not dependent on the suspended-ceiling grid for support. Ballasts, transformers, and electronic power supplies installed in suspended ceilings shall not be connected to the branch circuit by flexible cord.", + "displayTitle": "(F) Suspended Ceilings", + "children": [], + "url": "https://2023.antflix.net#600.21_(F)" + } + ], + "url": "https://2023.antflix.net#600.21" + }, + { + "displayTitle": "600.22 Ballasts", + "children": [ + { + "body": "Ballasts shall be identified for the use and shall be listed.", + "displayTitle": "(A) Type", + "children": [], + "url": "https://2023.antflix.net#600.22_(A)" + }, + { + "body": "Ballasts shall be thermally protected.", + "displayTitle": "(B) Thermal Protection", + "children": [], + "url": "https://2023.antflix.net#600.22_(B)" + } + ], + "url": "https://2023.antflix.net#600.22" + }, + { + "displayTitle": "600.23 Transformers and Electronic Power Supplies", + "children": [ + { + "body": "Transformers and electronic power supplies shall be identified for the use and shall be listed.", + "displayTitle": "(A) Type", + "children": [], + "url": "https://2023.antflix.net#600.23_(A)" + }, + { + "body": "Transformers and electronic power supplies other than the following shall have secondary-circuit ground-fault protection: Transformers with isolated ungrounded secondaries and with a maximum open circuit voltage of 7500 volts or lessTransformers with integral porcelain or glass secondary housing for the neon tubing and requiring no field wiring of the secondary circuit", + "displayTitle": "(B) Secondary-Circuit Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#600.23_(B)" + }, + { + "body": "Secondary-circuit voltage shall not exceed 15,000 volts, nominal, under any load condition. The voltage to ground of any output terminals of the secondary circuit shall not exceed 7500 volts, under any load condition.", + "displayTitle": "(C) Voltage", + "children": [], + "url": "https://2023.antflix.net#600.23_(C)" + }, + { + "body": "Transformers and electronic power supplies shall have a secondary-circuit current rating of not more than 300 mA.", + "displayTitle": "(D) Rating", + "children": [], + "url": "https://2023.antflix.net#600.23_(D)" + }, + { + "body": "Secondary circuit outputs shall not be connected in parallel or in series.", + "displayTitle": "(E) Secondary Connections", + "children": [], + "url": "https://2023.antflix.net#600.23_(E)" + }, + { + "body": "Transformers and electronic power supplies that are equipped with secondary-circuit ground-fault protection shall be so marked.", + "displayTitle": "(F) Marking", + "children": [], + "url": "https://2023.antflix.net#600.23_(F)" + } + ], + "url": "https://2023.antflix.net#600.23" + }, + { + "body": "Class 2 transformers, power supplies, and power sources shall comply with the requirements of Class 2 circuits and 600.24(A), (B), (C), and (D).", + "displayTitle": "600.24 Class 2 Power Sources", + "children": [ + { + "body": "Class 2 power supplies and power sources shall be listed for use with electric signs and outline lighting systems or shall be a component in a listed electric sign.", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#600.24_(A)" + }, + { + "body": "Metal parts of Class 2 power supplies and power sources shall be connected to the equipment grounding conductor.", + "displayTitle": "(B) Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#600.24_(B)" + }, + { + "body": "Conductors and equipment on the supply side of the power source shall be installed in accordance with the appropriate requirements of Chapter 3.", + "displayTitle": "(C) Wiring Methods on the Supply Side of the Class 2 Power Supply", + "children": [], + "url": "https://2023.antflix.net#600.24_(C)" + }, + { + "body": "Secondary wiring on the load side of a Class 2 power source shall comply with 600.12(C) and 600.33.", + "displayTitle": "(D) Secondary Wiring", + "children": [], + "url": "https://2023.antflix.net#600.24_(D)" + } + ], + "url": "https://2023.antflix.net#600.24" + }, + { + "displayTitle": "Part II Field-Installed Skeleton Tubing, Outline Lighting, and Secondary Wiring", + "children": [], + "url": "https://2023.antflix.net#divider_90_II" + }, + { + "body": "Part II of this article shall apply to all of the following: Field-installed skeleton tubingField-installed secondary circuitsOutline lightingField-installed retrofit kitsThese requirements shall be in addition to the requirements of Part I.", + "displayTitle": "600.30 Applicability", + "children": [], + "url": "https://2023.antflix.net#600.30" + }, + { + "displayTitle": "600.31 Neon Secondary-Circuit Wiring, 1000 Volts or Less, Nominal", + "children": [ + { + "body": "Conductors shall be installed using any wiring method included in Chapter 3 suitable for the conditions.", + "displayTitle": "(A) Wiring Method", + "children": [], + "url": "https://2023.antflix.net#600.31_(A)" + }, + { + "body": "Conductors shall be listed, insulated, and not smaller than 18 AWG.", + "displayTitle": "(B) Insulation and Size", + "children": [], + "url": "https://2023.antflix.net#600.31_(B)" + }, + { + "body": "The number of conductors in a raceway shall be in accordance with Table 1 of Chapter 9.", + "displayTitle": "(C) Number of Conductors in Raceway", + "children": [], + "url": "https://2023.antflix.net#600.31_(C)" + }, + { + "body": "Conductors shall be installed so they are not subject to physical damage.", + "displayTitle": "(D) Installation", + "children": [], + "url": "https://2023.antflix.net#600.31_(D)" + }, + { + "body": "Bushings shall be used to protect wires passing through an opening in metal.", + "displayTitle": "(E) Protection of Leads", + "children": [], + "url": "https://2023.antflix.net#600.31_(E)" + } + ], + "url": "https://2023.antflix.net#600.31" + }, + { + "displayTitle": "600.32 Neon Secondary-Circuit Wiring, Over 1000 Volts, Nominal", + "children": [ + { + "displayTitle": "(A) Wiring Methods", + "children": [ + { + "body": "Conductors shall be installed in rigid metal conduit, intermediate metal conduit, liquidtight flexible nonmetallic conduit, flexible metal conduit, liquidtight flexible metal conduit, electrical metallic tubing, metal enclosures; on insulators in metal raceways; or in other equipment listed for use with neon secondary circuits over 1000 volts.", + "displayTitle": "(1) Installation", + "children": [], + "url": "https://2023.antflix.net#600.32_(A)_(1)" + }, + { + "body": "Conduit or tubing shall contain only one conductor.", + "displayTitle": "(2) Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#600.32_(A)_(2)" + }, + { + "body": "Conduit or tubing shall be a minimum of metric designator 16 (trade size 1/2).", + "displayTitle": "(3) Size", + "children": [], + "url": "https://2023.antflix.net#600.32_(A)_(3)" + }, + { + "body": "Other than at the location of connection to a metal enclosure or sign body, nonmetallic conduit or flexible nonmetallic conduit shall comply with the following: Be spaced not less than 38 mm (11/2 in.) from grounded or bonded parts when the conduit contains a conductor operating at 100 Hz or less, orBe spaced not less than 45 mm (13/4 in.) from grounded or bonded parts when the conduit contains a conductor operating at more than 100 Hz", + "displayTitle": "(4) Spacing From Grounded Parts", + "children": [], + "url": "https://2023.antflix.net#600.32_(A)_(4)" + }, + { + "body": "Metal parts of a building shall not be permitted as a secondary return conductor or an equipment grounding conductor.", + "displayTitle": "(5) Metal Building Parts", + "children": [], + "url": "https://2023.antflix.net#600.32_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#600.32_(A)" + }, + { + "body": "Conductors shall be insulated, listed as gas tube sign and ignition cable type GTO, rated for 5, 10, or 15 kV, not smaller than 18 AWG, and have a minimum temperature rating of 105\u00b0C (221 \u00b0F).", + "displayTitle": "(B) Insulation and Size", + "children": [], + "url": "https://2023.antflix.net#600.32_(B)" + }, + { + "body": "Conductors shall be so installed that they are not subject to physical damage.", + "displayTitle": "(C) Installation", + "children": [], + "url": "https://2023.antflix.net#600.32_(C)" + }, + { + "body": "Sharp bends in insulated conductors shall be avoided.", + "displayTitle": "(D) Bends in Conductors", + "children": [], + "url": "https://2023.antflix.net#600.32_(D)" + }, + { + "body": "Secondary conductors shall be separated from each other and from all objects other than insulators or neon tubing by a spacing of not less than 38 mm (11/2 in.). GTO cable installed in metal conduit or tubing shall not require spacing between the cable insulation and the conduit or tubing.", + "displayTitle": "(E) Spacing", + "children": [], + "url": "https://2023.antflix.net#600.32_(E)" + }, + { + "body": "Insulators and bushings for conductors shall be listed for use with neon secondary circuits over 1000 volts.", + "displayTitle": "(F) Insulators and Bushings", + "children": [], + "url": "https://2023.antflix.net#600.32_(F)" + }, + { + "body": "The insulation on all conductors shall extend not less than 65 mm (21/2 in.) beyond the metal conduit or tubing.", + "displayTitle": "(G) Conductors in Raceways", + "children": [], + "url": "https://2023.antflix.net#600.32_(G)" + }, + { + "body": "Conductors shall be permitted to run between the ends of neon tubing or to the secondary circuit midpoint return of listed transformers or listed electronic power supplies and provided with terminals or leads at the midpoint.", + "displayTitle": "(H) Between Neon Tubing and Midpoint Return", + "children": [], + "url": "https://2023.antflix.net#600.32_(H)" + }, + { + "body": "Equipment having an open circuit voltage exceeding 1000 volts shall not be installed in or on dwelling occupancies.", + "displayTitle": "(I) Dwelling Occupancies", + "children": [], + "url": "https://2023.antflix.net#600.32_(I)" + }, + { + "displayTitle": "(J) Length of Secondary Circuit Conductors", + "children": [ + { + "body": "The length of secondary circuit conductors from a high-voltage terminal or lead of a transformer or electronic power supply to the first neon tube electrode shall not exceed the following: 6 m (20 ft) where installed in metal conduit or tubing15 m (50 ft) where installed in nonmetallic conduit", + "displayTitle": "(1) Secondary Conductor to the First Electrode", + "children": [], + "url": "https://2023.antflix.net#600.32_(J)_(1)" + }, + { + "body": "All other sections of secondary circuit conductor in a neon tube circuit shall be as short as practicable.", + "displayTitle": "(2) Other Secondary Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#600.32_(J)_(2)" + } + ], + "url": "https://2023.antflix.net#600.32_(J)" + }, + { + "body": "Splices in high-voltage secondary circuit conductors shall be made in listed enclosures rated over 1000 volts. Splice enclosures shall be accessible after installation and listed for the location where they are installed.", + "displayTitle": "(K) Splices", + "children": [], + "url": "https://2023.antflix.net#600.32_(K)" + } + ], + "url": "https://2023.antflix.net#600.32" + }, + { + "body": "The wiring methods and materials used shall be in accordance with the sign manufacturer's installation instructions using any applicable wiring methods from Chapter 3, Wiring Methods, or the requirements for Class 2 circuits contained in 600.12(C), 600.24, and 600.33(A), (B), (C), and (D).", + "displayTitle": "600.33 Class 2 Sign Illumination Systems, Secondary Wiring", + "children": [ + { + "body": "Class 2 cable listed for the application that complies with Table 600.33(A)(1) or Table 600.33(A)(2) for substitutions shall be installed on the load side of the Class 2 power source. The conductors shall have an ampacity not less than the load to be supplied and shall not be sized smaller than 18 AWG.", + "displayTitle": "(A) Insulation and Sizing of Class 2 Conductors", + "children": [ + { + "body": "CL2 or CL3, PLTC, or any listed applicable cable for general use shall be installed within and on buildings or structures.", + "displayTitle": "(1) General Use", + "children": [], + "url": "https://2023.antflix.net#600.33_(A)_(1)" + }, + { + "body": "In other locations, any listed applicable cable permitted in 600.33(A)(1), (A)(2), (A)(3), and (A)(4) and Table 600.33(A)(1) and Table 600.33(A)(2) shall be permitted to be used as follows: CL2P or CL3P - Ducts, plenums, or other spaces used for environmental airCL2R or CL3R - Vertical shafts and risersSubstitutions from Table 600.33(A)(2)", + "displayTitle": "(2) Other Building Locations", + "children": [], + "url": "https://2023.antflix.net#600.33_(A)_(2)" + }, + { + "body": "Class 2 cable used in a wet location shall be listed and marked suitable for use in a wet location.", + "displayTitle": "(3) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#600.33_(A)_(3)" + }, + { + "body": "Class 2 cable exposed to sunlight shall be listed and marked \"sunlight resistant - suitable for outdoor use.\" Exception: Listed PLTC not marked as sunlight resistant shall be permitted. Informational Note: PLTC is tested for exposure to sunlight but might not be so marked.", + "displayTitle": "(4) Other Locations", + "children": [], + "url": "https://2023.antflix.net#600.33_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#600.33_(A)" + }, + { + "body": "Secondary wiring shall be installed in accordance with 600.33(B)(1) and (B)(2). Wiring shall be installed and supported in a neat and workmanlike manner. Cables and conductors installed exposed on the surface of ceilings and sidewalls shall be supported by the building structure in such a manner that the cable is not damaged by normal building use. The cable shall be supported and secured at intervals not exceeding 1.8 m (6 ft). Such cables shall be supported by straps, staples, hangers, cable ties, or similar fittings designed and installed so as not to damage the cable. The installation shall also comply with 300.4(D).Connections in cable and conductors shall be made with listed insulating devices and be accessible after installation. Where made in a wall, connections shall be enclosed in a listed box.", + "displayTitle": "(B) Installation", + "children": [], + "url": "https://2023.antflix.net#600.33_(B)" + }, + { + "body": "If subject to physical damage, the conductors shall be protected and installed in accordance with 300.4. All through-wall penetrations shall be protected by a listed bushing or raceway.", + "displayTitle": "(C) Protection Against Physical Damage", + "children": [], + "url": "https://2023.antflix.net#600.33_(C)" + }, + { + "body": "Grounding and bonding shall be in accordance with 600.7. Table 600.33(A)(1) Applications of Power Limited Cable in Signs and Outline Lighting Location CL2 CL3 CL2R CL3R CL2P CL3P PLTC Nonconcealed spaces inside buildings Y Y Y Y Y Y Y Concealed spaces inside buildings that are not used as plenums or risers Y Y Y Y Y Y Y Environmental air spaces plenums N N N N Y Y N Environmental air spaces risers N N Y Y Y Y N Wet locations N N N N N N Y Y = Permitted. N = Not Permitted. Table 600.33(A)(2) Class 2 Cable Substitutions Cable Type Permitted Substitutions CL3P CMP CL2P CMP, CL3P CL3R CMP, CL3P, CMR CL2R CMP, CL3P, CL2P, CMR, CL3R CL3 CMP, CL3P, CMR, CL3R, CMG, CM, PLTC CL2 CMP, CL3P, CL2P, CMR, CL3R, CL2R, CMG, CM, PLTC, CL3 CLX CMP, CL3P, CMR, CL3R, CMG, CM, PLTC, CL3, CMX CL2X CMP, CL3P, CL2P, CMR, CL3R, CL2R, CMG, CM, PLTC, CL3, CL2, CMX, CL3X PLTC None ", + "displayTitle": "(D) Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#600.33_(D)" + } + ], + "url": "https://2023.antflix.net#600.33" + }, + { + "body": "All field wiring of components and subassemblies for an off-grid stand-alone, on-grid interactive, or non-grid interactive PV installation shall be installed in accordance with Article 690, as applicable, 600.34, and the PV powered sign installation instructions.", + "displayTitle": "600.34 Photovoltaic (PV) Powered Sign", + "children": [ + { + "body": "Inverters, motor generators, PV modules, PV panels, ac PV modules, dc combiners, dc-ac converters, and charge controllers intended for use in PV powered sign systems shall be listed for PV application.", + "displayTitle": "(A) Equipment", + "children": [], + "url": "https://2023.antflix.net#600.34_(A)" + }, + { + "body": "Wiring from a photovoltaic panel or wiring external to the PV sign body shall be: Listed, labeled, and suitable for photovoltaic applicationsRouted to closely follow the sign body or enclosureAs short as possible and secured at intervals not exceeding 0.91 m (3 ft)Protected where subject to physical damage", + "displayTitle": "(B) Wiring", + "children": [], + "url": "https://2023.antflix.net#600.34_(B)" + }, + { + "body": "Flexible cords and cables shall comply with Article 400 and be identified as extra hard usage, rated for outdoor use, and water and sunlight resistant.", + "displayTitle": "(C) Flexible Cords and Cables", + "children": [], + "url": "https://2023.antflix.net#600.34_(C)" + }, + { + "body": "Grounding a PV powered sign shall comply with Article 690, Part V and 600.7.", + "displayTitle": "(D) Grounding", + "children": [], + "url": "https://2023.antflix.net#600.34_(D)" + }, + { + "body": "The disconnecting means for a PV powered sign shall comply with Article 690, Part III and 600.6.", + "displayTitle": "(E) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#600.34_(E)" + }, + { + "body": "Battery compartments shall require a tool to open.", + "displayTitle": "(F) Battery Compartments", + "children": [], + "url": "https://2023.antflix.net#600.34_(F)" + } + ], + "url": "https://2023.antflix.net#600.34" + }, + { + "displayTitle": "600.35 Retrofit Kits", + "children": [ + { + "body": "A general-use or sign-specific retrofit kit for a sign or outline lighting system shall include installation instructions and requirements for field conversion of a host sign. The retrofit kit shall be listed and labeled.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#600.35_(A)" + }, + { + "body": "All parts that are not replaced by a retrofit kit shall be inspected for damage. Any part found to be damaged or damaged during conversion of the sign shall be replaced or repaired to maintain the sign or outline lighting system's dry, damp, or wet location rating.", + "displayTitle": "(B) Damaged Parts", + "children": [], + "url": "https://2023.antflix.net#600.35_(B)" + }, + { + "body": "The retrofitted sign shall be marked in accordance with 600.4(B).", + "displayTitle": "(C) Marking", + "children": [], + "url": "https://2023.antflix.net#600.35_(C)" + } + ], + "url": "https://2023.antflix.net#600.35" + }, + { + "displayTitle": "600.41 Neon Tubing", + "children": [ + { + "body": "The length and design of the tubing shall not cause a continuous overcurrent beyond the design loading of the transformer or electronic power supply.", + "displayTitle": "(A) Design", + "children": [], + "url": "https://2023.antflix.net#600.41_(A)" + }, + { + "body": "Tubing shall be supported by listed tube supports. The neon tubing shall be supported within 150 mm (6 in.) from the electrode connection.", + "displayTitle": "(B) Support", + "children": [], + "url": "https://2023.antflix.net#600.41_(B)" + }, + { + "body": "A spacing of not less than 6 mm (1/4 in.) shall be maintained between the tubing and the nearest surface, other than its support.", + "displayTitle": "(C) Spacing", + "children": [], + "url": "https://2023.antflix.net#600.41_(C)" + }, + { + "body": "Field-installed skeleton tubing shall not be subject to physical damage. Where the tubing is readily accessible to other than qualified persons, field-installed skeleton tubing shall be provided with suitable guards or protected by other approved means.", + "displayTitle": "(D) Protection", + "children": [], + "url": "https://2023.antflix.net#600.41_(D)" + } + ], + "url": "https://2023.antflix.net#600.41" + }, + { + "displayTitle": "600.42 Electrode Connections", + "children": [ + { + "body": "Where the high-voltage secondary circuit conductors emerge from the wiring methods specified in 600.32(A), they shall be enclosed in a listed assembly.", + "displayTitle": "(A) Points of Transition", + "children": [], + "url": "https://2023.antflix.net#600.42_(A)" + }, + { + "body": "Terminals of the electrode shall not be accessible to unqualified persons.", + "displayTitle": "(B) Accessibility", + "children": [], + "url": "https://2023.antflix.net#600.42_(B)" + }, + { + "body": "Connections shall be made by use of a connection device, twisting of the wires together, or use of an electrode receptacle. Connections shall be electrically and mechanically secure and shall be in an enclosure listed for the purpose.", + "displayTitle": "(C) Electrode Connections", + "children": [], + "url": "https://2023.antflix.net#600.42_(C)" + }, + { + "body": "Neon secondary conductor(s) shall be supported not more than 150 mm (6 in.) from the electrode connection to the tubing.", + "displayTitle": "(D) Support", + "children": [], + "url": "https://2023.antflix.net#600.42_(D)" + }, + { + "body": "Electrode receptacles shall be listed.", + "displayTitle": "(E) Receptacles", + "children": [], + "url": "https://2023.antflix.net#600.42_(E)" + }, + { + "body": "Where electrodes penetrate an enclosure, bushings listed for the purpose shall be used unless receptacles are provided.", + "displayTitle": "(F) Bushings", + "children": [], + "url": "https://2023.antflix.net#600.42_(F)" + }, + { + "body": "A listed cap shall be used to close the opening between neon tubing and a receptacle where the receptacle penetrates a building. Where a bushing or neon tubing penetrates a building, the opening between neon tubing and the bushing shall be sealed.", + "displayTitle": "(G) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#600.42_(G)" + }, + { + "body": "Electrode enclosures shall be listed.", + "displayTitle": "(H) Electrode Enclosures", + "children": [ + { + "body": "Electrode enclosures that are listed, labeled, and identified for use in dry, damp, or wet locations shall be permitted to be installed and used in such locations.", + "displayTitle": "(1) Dry Locations", + "children": [], + "url": "https://2023.antflix.net#600.42_(H)_(1)" + }, + { + "body": "Electrode enclosures installed in damp and wet locations shall be specifically listed, labeled, and identified for use in such locations. Informational Note: See 110.3(B) covering installation and use of electrical equipment.", + "displayTitle": "(2) Damp and Wet Locations", + "children": [], + "url": "https://2023.antflix.net#600.42_(H)_(2)" + } + ], + "url": "https://2023.antflix.net#600.42_(H)" + } + ], + "url": "https://2023.antflix.net#600.42" + } + ], + "url": "https://2023.antflix.net#600" + }, + { + "displayTitle": "Article 604 Manufactured Wiring Systems", + "children": [ + { + "body": "This article applies to field-installed wiring using off-site manufactured subassemblies for branch circuits, remote-control circuits, signaling circuits, and communications circuits in accessible areas.", + "displayTitle": "604.1 Scope", + "children": [], + "url": "https://2023.antflix.net#604.1" + }, + { + "body": "Manufactured wiring systems and associated components shall be listed. Informational Note: See ANSI/UL 183, Standard for Manufacturing Wiring Systems, the safety standard for manufactured wiring systems.", + "displayTitle": "604.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#604.6" + }, + { + "body": "Manufactured wiring systems shall be secured and supported in accordance with the applicable cable or conduit article for the cable or conduit type employed.", + "displayTitle": "604.7 Installation", + "children": [], + "url": "https://2023.antflix.net#604.7" + }, + { + "body": "Manufactured wiring systems shall be permitted in accessible and dry locations and in ducts, plenums, and other air-handling spaces where listed for this application and installed in accordance with 300.22. Exception No. 1: In concealed spaces, one end of tapped cable shall be permitted to extend into hollow walls for direct termination at switch and outlet points. Exception No. 2: Manufactured wiring system assemblies installed outdoors shall be listed for use in outdoor locations.", + "displayTitle": "604.10 Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#604.10" + }, + { + "body": "Manufactured wiring system types shall not be permitted where limited by the applicable article in Chapter 3 for the wiring method used in its construction.", + "displayTitle": "604.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#604.12" + }, + { + "displayTitle": "604.100 Construction", + "children": [ + { + "displayTitle": "(A) Cable, Conduit, and Tubing Types", + "children": [ + { + "body": "Cable shall be listed Type AC cable or listed Type MC cable containing nominal 600-volt, 8 AWG to 12 AWG insulated copper-clad aluminum or copper conductors. Other cables as listed in 722.135, 800.113, and 830.179 shall be permitted in manufactured wiring systems for wiring of equipment within the scope of their respective articles.", + "displayTitle": "(1) Cables", + "children": [], + "url": "https://2023.antflix.net#604.100_(A)_(1)" + }, + { + "body": "Conduit shall be listed flexible metal conduit (FMC), listed liquidtight flexible metal conduit (LFMC), liquidtight flexible nonmetallic conduit (LFNC), or electrical metallic tubing (EMT) containing nominal 600-volt, 8 AWG to 12 AWG insulated copper-clad aluminum or copper conductors with a bare or insulated copper-clad aluminum or copper equipment grounding conductor equivalent in size to the ungrounded conductor. Exception No. 1 to (1) and (2): A luminaire tap, no longer than 1.8 m (6 ft) and intended for connection to a single luminaire, shall be permitted to contain conductors smaller than 12 AWG but not smaller than 18 AWG. Exception No. 2 to (1) and (2): Listed manufactured wiring assemblies containing conductors smaller than 12 AWG shall be permitted for remote-control, signaling, or communications circuits. Exception No. 3 to (2): Listed manufactured wiring systems containing unlisted flexible metal conduit of noncircular cross section or trade sizes smaller than permitted by 348.20(A), or both, shall be permitted where the wiring systems are supplied with fittings and conductors at the time of manufacture.", + "displayTitle": "(2) Conduits and Tubing", + "children": [], + "url": "https://2023.antflix.net#604.100_(A)_(2)" + }, + { + "body": "Flexible cord suitable for hard usage, with minimum 12 AWG conductors, shall be permitted as part of a listed factory-made assembly not exceeding 1.8 m (6 ft) in length when making a transition between components of a manufactured wiring system and utilization equipment not permanently secured to the building structure. The cord shall be visible for the entire length, shall not be subject to physical damage, and shall be provided with identified strain relief. Exception: Listed electric-discharge luminaires that comply with 410.62(C) shall be permitted with conductors smaller than 12 AWG.", + "displayTitle": "(3) Flexible Cord", + "children": [], + "url": "https://2023.antflix.net#604.100_(A)_(3)" + }, + { + "body": "Busways shall be listed continuous plug-in type containing factory-mounted, bare or insulated conductors, which shall be copper or aluminum bars, rods, or tubes. The busway shall be provided with an equipment ground. The busway shall be rated nominal 600 volts, 20, 30, or 40 amperes. Busways shall be installed in accordance with 368.12, 368.17(D), and 368.30.", + "displayTitle": "(4) Busways", + "children": [], + "url": "https://2023.antflix.net#604.100_(A)_(4)" + }, + { + "body": "Prewired, modular, surface-mounted raceways shall be listed for the use, rated nominal 600 volts, 20 amperes, and installed in accordance with 386.12, 386.30, 386.60, and 386.100.", + "displayTitle": "(5) Raceway", + "children": [], + "url": "https://2023.antflix.net#604.100_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#604.100_(A)" + }, + { + "body": "Each section shall be marked to identify the type of cable, flexible cord, or conduit.", + "displayTitle": "(B) Marking", + "children": [], + "url": "https://2023.antflix.net#604.100_(B)" + }, + { + "body": "Receptacles and connectors shall be of the locking type, uniquely polarized and identified for the purpose, and shall be part of a listed assembly for the appropriate system. All connector openings shall be designed to prevent inadvertent contact with live parts or capped to effectively close the connector openings.", + "displayTitle": "(C) Receptacles and Connectors", + "children": [], + "url": "https://2023.antflix.net#604.100_(C)" + }, + { + "body": "Other component parts shall be listed for the appropriate system.", + "displayTitle": "(D) Other Component Parts", + "children": [], + "url": "https://2023.antflix.net#604.100_(D)" + } + ], + "url": "https://2023.antflix.net#604.100" + } + ], + "url": "https://2023.antflix.net#604" + }, + { + "displayTitle": "Article 605 Office Furnishings", + "children": [ + { + "displayTitle": "605.1 Scope", + "children": [ + { + "body": "This article covers electrical equipment, lighting accessories, and wiring systems used to connect, contained within, or installed on office furnishings.", + "displayTitle": "(A) Covered", + "children": [], + "url": "https://2023.antflix.net#605.1_(A)" + }, + { + "body": "This article does not apply to individual office furnishings not connected to a system, such as chairs, freestanding desks, tables, storage units, and shelving units.", + "displayTitle": "(B) Not Covered", + "children": [], + "url": "https://2023.antflix.net#605.1_(B)" + } + ], + "url": "https://2023.antflix.net#605.1" + }, + { + "body": "Wiring systems shall be identified as suitable for providing power for lighting accessories and utilization equipment used within office furnishings. A wired partition shall not extend from floor to ceiling. Exception: Where permitted by the authority having jurisdiction, these relocatable wired partitions shall be permitted to extend to, but shall not penetrate, the ceiling.", + "displayTitle": "605.3 General", + "children": [], + "url": "https://2023.antflix.net#605.3" + }, + { + "body": "All conductors and connections shall be contained within wiring channels of metal or other material identified as suitable for the conditions of use. Wiring channels shall be free of projections or other conditions that might damage conductor insulation.", + "displayTitle": "605.4 Wireways", + "children": [], + "url": "https://2023.antflix.net#605.4" + }, + { + "body": "The electrical connection between office furnishings shall be a flexible assembly identified for use with office furnishings or shall be permitted to be installed using flexible cord, provided that all the following conditions are met: The cord is extra-hard usage type with 12 AWG or larger conductors, with an insulated equipment grounding conductor.The office furnishings are mechanically contiguous.The cord is not longer than necessary for maximum positioning of the office furnishing but is in no case to exceed 600 mm (2 ft).The cord is terminated at an attachment plug-and-cord connector with strain relief.", + "displayTitle": "605.5 Office Furnishing Interconnections", + "children": [], + "url": "https://2023.antflix.net#605.5" + }, + { + "body": "Lighting equipment shall be listed, labeled, and identified for use with office furnishings and shall comply with 605.6(A), (B), and (C).", + "displayTitle": "605.6 Lighting Accessories", + "children": [ + { + "body": "A means for secure attachment or support shall be provided.", + "displayTitle": "(A) Support", + "children": [], + "url": "https://2023.antflix.net#605.6_(A)" + }, + { + "body": "Where cord and plug connection is provided, it shall comply with all of the following: The cord length shall be suitable for the intended application but shall not exceed 2.7 m (9 ft) in length.The cord shall not be smaller than 18 AWG.The cord shall contain an equipment grounding conductor, except as specified in 605.6(B)(4).Cords on the load side of a listed Class 2 power source shall not be required to contain an equipment grounding conductor.The cord shall be of the hard usage type, except as specified in 605.6(B)(6).A cord provided on a listed Class 2 power source shall be of the type provided with the listed luminaire assembly or of the type specified in 725.130 and 725.127.Connection by other means shall be identified as suitable for the conditions of use.", + "displayTitle": "(B) Connection", + "children": [], + "url": "https://2023.antflix.net#605.6_(B)" + }, + { + "body": "Receptacles shall not be permitted in lighting accessories.", + "displayTitle": "(C) Receptacle Outlet", + "children": [], + "url": "https://2023.antflix.net#605.6_(C)" + } + ], + "url": "https://2023.antflix.net#605.6" + }, + { + "body": "Office furnishings that are fixed (secured to building surfaces) shall be permanently connected to the building electrical system by one of the wiring methods of Chapter 3.", + "displayTitle": "605.7 Fixed-Type Office Furnishings", + "children": [], + "url": "https://2023.antflix.net#605.7" + }, + { + "body": "Office furnishings of the freestanding type (not fixed) shall be permitted to be connected to the building electrical system by one of the wiring methods of Chapter 3.", + "displayTitle": "605.8 Freestanding-Type Office Furnishings", + "children": [], + "url": "https://2023.antflix.net#605.8" + }, + { + "body": "Individual office furnishings of the freestanding type, or groups of individual office furnishings that are electrically connected, are mechanically contiguous, and do not exceed 9.0 m (30 ft) when assembled, shall be permitted to be connected to the building electrical system by a single flexible cord and plug, provided that all of the conditions of 605.9(A) through (D) are met.", + "displayTitle": "605.9 Freestanding-Type Office Furnishings, Cord- And Plug-Connected", + "children": [ + { + "body": "The flexible power supply cord shall be extra-hard usage type with 12 AWG or larger conductors, with an insulated equipment grounding conductor, and shall not exceed 600 mm (2 ft) in length.", + "displayTitle": "(A) Flexible Power-Supply Cord", + "children": [], + "url": "https://2023.antflix.net#605.9_(A)" + }, + { + "body": "The receptacle(s) supplying power shall be on a separate circuit serving only the office furnishing and no other loads and shall be located not more than 300 mm (12 in.) from the office furnishing that is connected to it.", + "displayTitle": "(B) Receptacle Supplying Power", + "children": [], + "url": "https://2023.antflix.net#605.9_(B)" + }, + { + "body": "An individual office furnishing or groups of interconnected individual office furnishings shall not contain more than 13 15-ampere, 125-volt receptacles. For purposes of this requirement, a receptacle is considered (1) up to two (simplex) receptacles provided within a single enclosure and that are within 0.3 m (1 ft) of each other or (2) one duplex receptacle.", + "displayTitle": "(C) Receptacle. Maximum", + "children": [], + "url": "https://2023.antflix.net#605.9_(C)" + }, + { + "body": "An individual office furnishing or groups of interconnected office furnishings shall not contain multiwire circuits. Informational Note: See 210.4 for circuits supplying office furnishings in 605.7 and 605.8.", + "displayTitle": "(D) Multiwire Circuits, Not Permitted", + "children": [], + "url": "https://2023.antflix.net#605.9_(D)" + } + ], + "url": "https://2023.antflix.net#605.9" + } + ], + "url": "https://2023.antflix.net#605" + }, + { + "displayTitle": "Article 610 Cranes and Hoists", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_91_I" + }, + { + "body": "This article covers the installation of electrical equipment and wiring used in connection with cranes, monorail hoists, hoists, and all runways. Informational Note: See ASME B30, Safety Standards for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings, for further information.", + "displayTitle": "610.1 Scope", + "children": [], + "url": "https://2023.antflix.net#610.1" + }, + { + "displayTitle": "610.3 Special Requirements for Particular Locations", + "children": [ + { + "body": "All equipment that operates in a hazardous (classified) location shall conform to Article 500.", + "displayTitle": "(A) Hazardous (Classified) Locations", + "children": [ + { + "body": "Equipment used in locations that are hazardous because of the presence of flammable gases or vapors shall conform to Article 501.", + "displayTitle": "(1) Class I Locations", + "children": [], + "url": "https://2023.antflix.net#610.3_(A)_(1)" + }, + { + "body": "Equipment used in locations that are hazardous because of combustible dust shall conform to Article 502.", + "displayTitle": "(2) Class II Locations", + "children": [], + "url": "https://2023.antflix.net#610.3_(A)_(2)" + }, + { + "body": "Equipment used in locations that are hazardous because of the presence of easily ignitible fibers or flyings shall conform to Article 503.", + "displayTitle": "(3) Class III Locations", + "children": [], + "url": "https://2023.antflix.net#610.3_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#610.3_(A)" + }, + { + "body": "Where a crane, hoist, or monorail hoist operates over readily combustible material, the resistors shall be located as permitted in the following: A well ventilated cabinet composed of noncombustible material constructed so that it does not emit flames or molten metalA cage or cab constructed of noncombustible material that encloses the sides of the cage or cab from the floor to a point at least 150 mm (6 in.) above the top of the resistors", + "displayTitle": "(B) Combustible Materials", + "children": [], + "url": "https://2023.antflix.net#610.3_(B)" + }, + { + "body": "See 668.32.", + "displayTitle": "(C) Electrolytic Cell Lines", + "children": [], + "url": "https://2023.antflix.net#610.3_(C)" + } + ], + "url": "https://2023.antflix.net#610.3" + }, + { + "displayTitle": "Part II Wiring", + "children": [], + "url": "https://2023.antflix.net#divider_91_II" + }, + { + "body": "Conductors shall be enclosed in raceways or be Type AC cable with insulated equipment grounding conductor, Type MC cable, or Type MI cable unless otherwise permitted or required in 610.11 (A) through (E).", + "displayTitle": "610.11 Wiring Method", + "children": [ + { + "body": "Contact conductors shall not be required to be enclosed in raceways.", + "displayTitle": "(A) Contact Conductor", + "children": [], + "url": "https://2023.antflix.net#610.11_(A)" + }, + { + "body": "Short lengths of exposed conductors at resistors, collectors, and other equipment shall not be required to be enclosed in raceways.", + "displayTitle": "(B) Exposed Conductors", + "children": [], + "url": "https://2023.antflix.net#610.11_(B)" + }, + { + "body": "Where flexible connections are necessary, flexible stranded conductors shall be used. Conductors shall be in flexible metal conduit, liquidtight flexible metal conduit, liquidtight flexible nonmetallic conduit, multiconductor cable, or an approved nonmetallic flexible raceway.", + "displayTitle": "(C) Flexible Connections to Motors and Similar Equipment", + "children": [], + "url": "https://2023.antflix.net#610.11_(C)" + }, + { + "body": "Where multiconductor cable is used with a suspended pushbutton station, the station shall be supported in some satisfactory manner that protects the electrical conductors against strain.", + "displayTitle": "(D) Pushbutton Station Multiconductor Cable", + "children": [], + "url": "https://2023.antflix.net#610.11_(D)" + }, + { + "body": "Where flexibility is required for power or control to moving parts, listed festoon cable or a cord suitable for the purpose shall be permitted, provided the following apply: Suitable strain relief and protection from physical damage is provided.In Class I, Division 2 locations, the cord is approved for extra-hard usage.", + "displayTitle": "(E) Flexibility to Moving Parts", + "children": [], + "url": "https://2023.antflix.net#610.11_(E)" + } + ], + "url": "https://2023.antflix.net#610.11" + }, + { + "body": "Conductors leaving raceways or cables shall comply with either 610.12(A) or (B).", + "displayTitle": "610.12 Raceway or Cable Terminal Fittings", + "children": [ + { + "body": "A box or terminal fitting that has a separately bushed hole for each conductor shall be used wherever a change is made from a raceway or cable to exposed wiring. A fitting used for this purpose shall not contain taps or splices and shall not be used at luminaire outlets.", + "displayTitle": "(A) Separately Bushed Hole", + "children": [], + "url": "https://2023.antflix.net#610.12_(A)" + }, + { + "body": "A bushing shall be permitted to be used in lieu of a box at the end of a rigid metal conduit, intermediate metal conduit, or electrical metallic tubing where the raceway terminates at unenclosed controls or similar equipment, including contact conductors, collectors, resistors, brakes, power-circuit limit switches, and dc split-frame motors.", + "displayTitle": "(B) Bushing in Lieu of a Box", + "children": [], + "url": "https://2023.antflix.net#610.12_(B)" + } + ], + "url": "https://2023.antflix.net#610.12" + }, + { + "body": "Conductors shall comply with Table 310.4(1) unless otherwise permitted in 610.13(A) through (C).", + "displayTitle": "610.13 Types of Conductors", + "children": [ + { + "body": "A conductor(s) exposed to external heat or connected to resistors shall have a flame-resistant outer covering or be covered with flame-resistant tape individually or as a group.", + "displayTitle": "(A) Exposed to External Heat or Connected to Resistors", + "children": [], + "url": "https://2023.antflix.net#610.13_(A)" + }, + { + "body": "Contact conductors along runways, crane bridges, and monorails shall be permitted to be bare and shall be copper, aluminum, steel, or other alloys or combinations thereof in the form of hard-drawn wire, tees, angles, tee rails, or other stiff shapes.", + "displayTitle": "(B) Contact Conductors", + "children": [], + "url": "https://2023.antflix.net#610.13_(B)" + }, + { + "body": "Where flexibility is required, listed flexible cord or cable, or listed festoon cable, shall be permitted to be used and, where necessary, cable reels or take-up devices shall be used.", + "displayTitle": "(C) Flexibility", + "children": [], + "url": "https://2023.antflix.net#610.13_(C)" + } + ], + "url": "https://2023.antflix.net#610.13" + }, + { + "displayTitle": "610.14 Rating and Size of Conductors", + "children": [ + { + "body": "The ampacities of conductors shall be as shown in Table 610.14(A). Informational Note: See 430.23 for the ampacities of conductors between controllers and resistors.", + "displayTitle": "(A) Ampacity", + "children": [], + "url": "https://2023.antflix.net#610.14_(A)" + }, + { + "body": "Where the secondary resistor is separate from the controller, the minimum size of the conductors between controller and resistor shall be calculated by multiplying the motor secondary current by the appropriate factor from Table 610.14(B) and selecting a wire from Table 610.14(A).", + "displayTitle": "(B) Secondary Resistor Conductors", + "children": [], + "url": "https://2023.antflix.net#610.14_(B)" + }, + { + "body": "Conductors external to motors and controls shall be not smaller than 16 AWG unless otherwise permitted in either of the following: 18 AWG wire in multiconductor cord shall be permitted for control circuits not exceeding 7 amperes.Wires not smaller than 20 AWG shall be permitted for electronic circuits.", + "displayTitle": "(C) Minimum Size", + "children": [], + "url": "https://2023.antflix.net#610.14_(C)" + }, + { + "body": "Contact wires shall have an ampacity not less than that required by Table 610.14(A) for 75\u00b0C (167\u00b0F) wire, and in no case shall they be smaller than as shown in Table 610.14(D).", + "displayTitle": "(D) Contact Conductors", + "children": [], + "url": "https://2023.antflix.net#610.14_(D)" + }, + { + "displayTitle": "(E) Calculation of Motor Load", + "children": [ + { + "body": "For one motor, 100 percent of motor nameplate full-load ampere rating shall be used.", + "displayTitle": "(1) Single Motor", + "children": [], + "url": "https://2023.antflix.net#610.14_(E)_(1)" + }, + { + "body": "For multiple motors on a single crane or hoist, the minimum ampacity of the power supply conductors shall be the nameplate full-load ampere rating of the largest motor or group of motors for any single crane motion, plus 50 percent of the nameplate full-load ampere rating of the next largest motor or group of motors, using that column of Table 610.14(A) that applies to the longest time-rated motor.", + "displayTitle": "(2) Multiple Motors on Single Crane or Hoist", + "children": [], + "url": "https://2023.antflix.net#610.14_(E)_(2)" + }, + { + "body": "For multiple cranes, hoists, or both, supplied by a common conductor system, calculate the motor minimum ampacity shall be calculated for each crane as defined in 610.14(E), added them together, and the sum multiplied by the appropriate demand factor from Table 610.14(E)(3).", + "displayTitle": "(3) Multiple Cranes or Hoists on a Common Conductor System", + "children": [], + "url": "https://2023.antflix.net#610.14_(E)_(3)" + } + ], + "url": "https://2023.antflix.net#610.14_(E)" + }, + { + "body": "Additional loads, such as heating, lighting, and air conditioning, shall be provided for by application of the appropriate sections of this Code.", + "displayTitle": "(F) Other Loads", + "children": [], + "url": "https://2023.antflix.net#610.14_(F)" + }, + { + "body": "Each crane, monorail, or hoist shall be provided with a visible nameplate marked with the manufacturer's name, rating in volts, frequency, number of phases, and circuit amperes as calculated in 610.14(E) and (F). Table 610.14(A) Ampacities of Insulated Copper Conductors Used with Short-Time Rated Crane and Hoist Motors. Based on Ambient Temperature of 30\u00b0C (86\u00b0F) Maximum Operating Temperature Up to Four Simultaneously Energized Conductors in Raceway or Cable1 Up to Three ac2 or Four dc1 Simultaneously Energized Conductors in Raceway or Cable Maximum Operating Temperature 75\u00b0C (167\u00b0F) 90\u00b0C (194\u00b0F) 125\u00b0C (257\u00b0F) Size (AWG or kcmil) Types MTW, RHW, THW, THWN, XHHW, USE, ZW Types TA, TBS, SA, SIS, PFA, FEP, FEPB, RHH, THHN, XHHW, Z, ZW Types FEP, FEPB, PFA, PFAH, SA, TFE, Z, ZW Size (AWG or kcmil) 60 Min 30 Min 60 Min 30 Min 60 Min 30 Min 16 10 12 - - - - 16 14 25 26 31 32 38 40 14 12 30 33 36 40 45 50 12 10 40 43 49 52 60 65 10 8 55 60 63 69 73 80 8 6 76 86 83 94 101 119 6 5 85 95 95 106 115 134 5 4 100 117 111 130 133 157 4 3 120 141 131 153 153 183 3 2 137 160 148 173 178 214 2 1 143 175 158 192 210 253 1 1/0 190 233 211 259 253 304 1/0 2/0 222 267 245 294 303 369 2/0 3/0 280 341 305 372 370 452 3/0 4/0 300 369 319 399 451 555 4/0 250 364 420 400 461 510 635 250 300 455 582 497 636 587 737 300 350 486 646 542 716 663 837 350 400 538 688 593 760 742 941 400 450 600 765 660 836 818 1042 450 500 660 847 726 914 896 1143 500 AMPACITY CORRECTION FACTORS Ambient Temperature (\u00b0C) For ambient temperatures other than 30\u00b0C (86\u00b0F), multiply the ampacities shown above by the appropriate factor shown below. Ambient Temperature (\u00b0F) 21\u201425 1.05 1.05 1.04 1.04 1.02 1.02 70\u201477 26\u201430 1.00 1.00 1.00 1.00 1.00 1.00 79\u201486 31\u201435 0.94 0.94 0.96 0.96 0.97 0.97 88\u201495 36\u201440 0.88 0.88 0.91 0.91 0.95 0.95 97\u2014104 41\u201445 0.82 0.82 0.87 0.87 0.92 0.92 106\u2014113 46\u201450 0.75 0.75 0.82 0.82 0.89 0.89 115\u2014122 51\u201455 0.67 0.67 0.76 0.76 0.86 0.86 124\u2014131 56\u201460 0.58 0.58 0.71 0.71 0.83 0.83 133\u2014140 61\u201470 0.33 0.33 0.58 0.58 0.76 0.76 142\u2014158 71\u201480 - - 0.41 0.41 0.69 0.69 160\u2014176 81\u201490 - - - - 0.61 0.61 177\u2014194 91\u2014100 - - - - 0.51 0.51 195\u2014212 101\u2014120 - - - - 0.40 0.40 213\u2014248 Note: Other insulations shown in Table 310.4(1) and approved for the temperature and location shall be permitted to be substituted for those shown in Table 610.14(A). The allowable ampacities of conductors used with 15-minute motors shall be the 30-minute ratings increased by 12 percent. 1 For 5 to 8 simultaneously energized power conductors in raceway or cable, the ampacity of each power conductor shall be reduced to a value of 80 percent of that shown in this table. 2 lor 4 to 6 simultaneously energized 125\u00b0C (257\u00b0F) ac power conductors in raceway or cable, the ampacity of each power conductor shall be reduced to a value of 80 percent of that shown in this table. Table 610.14(B) Secondary Conductor Rating Factors Time in Seconds Ampacity of Wire in Percent of Full-Load Secondary Current On Off 5 75 35 10 70 45 15 75 55 15 45 65 15 30 75 15 15 85 Continuous Duty 110 Table 610.14(D) Minimum Contact Conductor Size Based on Distance Between Supports Minimum Size of Wire (AWG) Maximum Distance Between End Strain Insulators or Clamp-Type Intermediate Supports 6 9.0 m (30 ft) or less 4 18 m (60 ft) or less 2 Over 18 m (60 ft) Table 610.14(E)(3) Demand Factors Number of Cranes or Hoists Demand Factor 2 0.95 3 0.91 4 0.87 5 0.84 6 0.81 7 0.78 ", + "displayTitle": "(G) Nameplate", + "children": [], + "url": "https://2023.antflix.net#610.14_(G)" + } + ], + "url": "https://2023.antflix.net#610.14" + }, + { + "body": "Where a crane or hoist is operated by more than one motor, a common-return conductor of proper ampacity shall be permitted.", + "displayTitle": "610.15 Common Return", + "children": [], + "url": "https://2023.antflix.net#610.15" + }, + { + "displayTitle": "Part III Contact Conductors", + "children": [], + "url": "https://2023.antflix.net#divider_80_III" + }, + { + "body": "Contact conductors shall comply with 610.21(A) through (H).", + "displayTitle": "610.21 Installation of Contact Conductors", + "children": [ + { + "body": "Runway contact conductors shall be guarded, and bridge contact conductors shall be located or guarded in such a manner that persons cannot inadvertently touch energized current-carrying parts.", + "displayTitle": "(A) Locating or Guarding Contact Conductors", + "children": [], + "url": "https://2023.antflix.net#610.21_(A)" + }, + { + "body": "Wires that are used as contact conductors shall be secured at the ends by means of approved strain insulators and shall be mounted on approved insulators so that the extreme limit of displacement of the wire does not bring the latter within less than 38 mm (11/2 in.) from the surface wired over.", + "displayTitle": "(B) Contact Wires", + "children": [], + "url": "https://2023.antflix.net#610.21_(B)" + }, + { + "body": "Main contact conductors carried along runways shall be supported on insulating supports placed at intervals not exceeding 6.0 m (20 ft) unless otherwise permitted in 610.21 (F). Such conductors shall be separated at not less than 150 mm (6 in.), other than for monorail hoists where a spacing of not less than 75 mm (3 in.) shall be permitted. Where necessary, intervals between insulating supports shall be permitted to be increased up to 12 m (40 ft), the separation between conductors being increased proportionately.", + "displayTitle": "(C) Supports Along Runways", + "children": [], + "url": "https://2023.antflix.net#610.21_(C)" + }, + { + "body": "Bridge wire contact conductors shall be kept at least 65 mm (21/2 in.) apart, and, where the span exceeds 25 m (80 ft), insulating saddles shall be placed at intervals not exceeding 15 m (50 ft).", + "displayTitle": "(D) Supports on Bridges", + "children": [], + "url": "https://2023.antflix.net#610.21_(D)" + }, + { + "body": "Conductors along runways and crane bridges, that are of the rigid type specified in 610.13(B) and not contained within an approved enclosed assembly, shall be carried on insulating supports spaced at intervals of not more than 80 times the vertical dimension of the conductor, but in no case greater than 4.5 m (15 ft), and spaced apart sufficiently to give a clear electrical separation of conductors or adjacent collectors of not less than 25 mm (1 in.).", + "displayTitle": "(E) Supports for Rigid Conductors", + "children": [], + "url": "https://2023.antflix.net#610.21_(E)" + }, + { + "body": "Monorail, tram rail, or crane runway tracks shall be permitted as a conductor of current for one phase of a 3-phase, ac system furnishing power to the carrier, crane, or trolley, provided all of the following conditions are met: The conductors supplying the other two phases of the power supply are insulated.The power for all phases is obtained from an insulating transformer.The voltage does not exceed 300 volts.The rail serving as a conductor shall be bonded to the equipment grounding conductor at the transformer and also shall be permitted to be grounded by the fittings used for the suspension or attachment of the rail to a building or structure.", + "displayTitle": "(F) Track as Circuit Conductor", + "children": [], + "url": "https://2023.antflix.net#610.21_(F)" + }, + { + "body": "All sections of contact conductors shall be mechanically joined to provide a continuous electrical connection.", + "displayTitle": "(G) Electrical Continuity of Contact Conductors", + "children": [], + "url": "https://2023.antflix.net#610.21_(G)" + }, + { + "body": "Contact conductors shall not be used as feeders for any equipment other than the crane(s) or hoist(s) that they are primarily designed to serve.", + "displayTitle": "(H) Not to Supply Other Equipment", + "children": [], + "url": "https://2023.antflix.net#610.21_(H)" + } + ], + "url": "https://2023.antflix.net#610.21" + }, + { + "body": "Collectors shall be designed so as to reduce to a minimum sparking between them and the contact conductor; and, where operated in rooms used for the storage of easily ignitible combustible fibers and materials, they shall comply with 503.155.", + "displayTitle": "610.22 Collectors", + "children": [], + "url": "https://2023.antflix.net#610.22" + }, + { + "displayTitle": "Part IV Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#divider_27_IV" + }, + { + "body": "A disconnecting means that has a continuous ampere rating not less than that calculated in 610.14(E) and (F) shall be provided between the runway contact conductors and the power supply. The disconnecting means shall comply with 430.109. This disconnecting means shall be as follows: Readily accessible and operable from the ground or floor levelLockable open in accordance with 110.25Open all ungrounded conductors simultaneouslyPlaced within view of the runway contact conductorsException: The runway conductor disconnecting means for electrolytic cell lines shall be permitted to be placed out of view of the runway contact conductors where either of the following conditions are met:Where a location in view of the contact conductors is impracticable or introduces additional or increased hazards to persons or propertyIn industrial installations, with written safety procedures, where conditions of maintenance and supervision ensure that only qualified persons service the equipment", + "displayTitle": "610.31 Runway Conductor Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#610.31" + }, + { + "body": "A disconnecting means in compliance with 430.109 shall be provided in the leads from the runway contact conductors or other power supply on all cranes and monorail hoists. The disconnecting means shall be lockable open in accordance with 110.25. Where a monorail hoist or hand-propelled crane bridge installation meets all of the following, the disconnecting means shall be permitted to be omitted:The unit is controlled from the ground or floor level.The unit is within view of the power supply disconnecting means.No fixed work platform has been provided for servicing the unit.Means shall be provided at the operating station to open the power circuit to all motors of the crane or monorail hoist.", + "displayTitle": "610.32 Disconnecting Means for Cranes and Monorail Hoists", + "children": [], + "url": "https://2023.antflix.net#610.32" + }, + { + "body": "The continuous ampere rating of the switch or circuit breaker required by 610.32 shall not be less than 50 percent of the combined short-time ampere rating of the motors or less than 75 percent of the sum of the short-time ampere rating of the motors required for any single motion.", + "displayTitle": "610.33 Rating of Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#610.33" + }, + { + "displayTitle": "Part V Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#divider_21_V" + }, + { + "displayTitle": "610.41 Feeders, Runway Conductors", + "children": [ + { + "body": "The runway supply conductors and main contact conductors of a crane or monorail shall be protected by an overcurrent device(s) that shall not be greater than the largest rating or setting of any branch-circuit protective device plus the sum of the nameplate ratings of all the other loads with application of the demand factors from Table 610.14(E)(3).", + "displayTitle": "(A) Single Feeder", + "children": [], + "url": "https://2023.antflix.net#610.41_(A)" + }, + { + "body": "Where more than one feeder circuit is installed to supply runway conductors, each feeder circuit shall be sized and protected in compliance with 610.41(A).", + "displayTitle": "(B) More Than One Feeder Circuit", + "children": [], + "url": "https://2023.antflix.net#610.41_(B)" + } + ], + "url": "https://2023.antflix.net#610.41" + }, + { + "body": "Branch circuits shall be protected in accordance with 610.42(A). Branch-circuit taps, where made, shall comply with 610.42(B).", + "displayTitle": "610.42 Branch-Circuit Short-Circuit and Ground-Fault Protection", + "children": [ + { + "body": "Crane, hoist, and mono-rail hoist motor branch circuits shall be protected by fuses or inverse-time circuit breakers that have a rating in accordance with Table 430.52(C)(1). Where two or more motors operate a single motion, the sum of their nameplate current ratings shall be considered as that of a single motor.", + "displayTitle": "(A) Fuse or Circuit Breaker Rating", + "children": [], + "url": "https://2023.antflix.net#610.42_(A)" + }, + { + "displayTitle": "(B) Taps", + "children": [ + { + "body": "Where two or more motors are connected to the same branch circuit, each tap conductor to an individual motor shall have an ampacity not less than one-third that of the branch circuit. Each motor shall be protected from overload according to 610.43.", + "displayTitle": "(1) Multiple Motors", + "children": [], + "url": "https://2023.antflix.net#610.42_(B)_(1)" + }, + { + "body": "Where taps to control circuits originate on the load side of a branch-circuit protective device, each tap and piece of equipment shall be protected in accordance with 430.72.", + "displayTitle": "(2) Control Circuits", + "children": [], + "url": "https://2023.antflix.net#610.42_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#610.42_(B)" + } + ], + "url": "https://2023.antflix.net#610.42" + }, + { + "displayTitle": "610.43 Overload Protection", + "children": [ + { + "body": "Each motor, motor controller, and branch-circuit conductor shall be protected from overload by one of the following means: A single motor shall be considered as protected where the branch-circuit overcurrent device meets the rating requirements of 610.42.Overload relay elements in each ungrounded circuit conductor, with all relay elements protected from short circuit by the branch-circuit protection.Thermal sensing devices, sensitive to motor temperature or to temperature and current, that are thermally in contact with the motor winding(s). Hoist functions shall be considered to be protected if the sensing device limits the hoist to lowering only during an overload condition. Traverse functions shall be considered to be protected if the sensing device limits the travel in both directions for the affected function during an overload condition of either motor.", + "displayTitle": "(A) Motor and Branch-Circuit Overload Protection", + "children": [], + "url": "https://2023.antflix.net#610.43_(A)" + }, + { + "body": "If the motor is manually controlled, with spring return controls, the overload protective device shall not be required to protect the motor against stalled rotor conditions.", + "displayTitle": "(B) Manually Controlled Motor", + "children": [], + "url": "https://2023.antflix.net#610.43_(B)" + }, + { + "body": "Where two or more motors drive a single trolley, truck, or bridge and are controlled as a unit and protected by a single set of overload devices with a rating equal to the sum of their rated full-load currents, a hoist or trolley shall be considered to be protected if the sensing device is connected in the hoist's upper limit switch circuit so as to prevent further hoisting during an overtemperature condition of either motor.", + "displayTitle": "(C) Multimotor", + "children": [], + "url": "https://2023.antflix.net#610.43_(C)" + }, + { + "body": "Hoists and monorail hoists and their trolleys that are not used as part of an overhead traveling crane shall not require individual motor overload protection, provided the largest motor does not exceed 71/2 hp and all motors are under manual control of the operator.", + "displayTitle": "(D) Hoists and Monorail Hoists", + "children": [], + "url": "https://2023.antflix.net#610.43_(D)" + } + ], + "url": "https://2023.antflix.net#610.43" + }, + { + "displayTitle": "Part VI Control", + "children": [], + "url": "https://2023.antflix.net#divider_14_VI" + }, + { + "body": "Each motor shall be provided with an individual controller unless otherwise permitted in 610.51(A) or (B).", + "displayTitle": "610.51 Separate Controllers", + "children": [ + { + "body": "Where two or more motors drive a single hoist, carriage, truck, or bridge, they shall be permitted to be controlled by a single controller.", + "displayTitle": "(A) Motions With More Than One Motor", + "children": [], + "url": "https://2023.antflix.net#610.51_(A)" + }, + { + "body": "One controller shall be permitted to be switched between motors, under the following conditions: The controller has a horsepower rating that is not lower than the horsepower rating of the largest motor.Only one motor is operated at one time.", + "displayTitle": "(B) Multiple Motion Controller", + "children": [], + "url": "https://2023.antflix.net#610.51_(B)" + } + ], + "url": "https://2023.antflix.net#610.51" + }, + { + "body": "Conductors of control circuits shall be protected against overcurrent. Control circuits shall be considered as protected by overcurrent devices that are rated or set at not more than 300 percent of the ampacity of the control conductors, unless otherwise permitted in 610.53(A) or (B).", + "displayTitle": "610.53 Overcurrent Protection", + "children": [ + { + "body": "Taps to control transformers shall be considered as protected where the secondary circuit is protected by a device rated or set at not more than 200 percent of the rated secondary current of the transformer and not more than 200 percent of the ampacity of the control circuit conductors.", + "displayTitle": "(A) Taps to Control Transformers", + "children": [], + "url": "https://2023.antflix.net#610.53_(A)" + }, + { + "body": "Where the opening of the control circuit would create a hazard, as for example, the control circuit of a hot metal crane, the control circuit conductors shall be considered as being properly protected by the branch-circuit overcurrent devices.", + "displayTitle": "(B) Continuity of Power", + "children": [], + "url": "https://2023.antflix.net#610.53_(B)" + } + ], + "url": "https://2023.antflix.net#610.53" + }, + { + "body": "The dimension of the working space in the direction of access to live parts that are likely to require examination, adjustment, servicing, or maintenance while energized shall be a minimum of 750 mm (21/2 ft). Where controls are enclosed in cabinets, the door(s) shall either open at least 90 degrees or be removable.", + "displayTitle": "610.57 Clearance", + "children": [], + "url": "https://2023.antflix.net#610.57" + }, + { + "displayTitle": "Part VII Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#divider_12_VII" + }, + { + "body": "All exposed non-current-carrying metal parts of cranes, monorail hoists, hoists, and accessories, including pendant controls, shall be bonded either by mechanical connections or bonding jumpers, where applicable, so that the entire crane or hoist is an effective ground-fault current path by connection to the equipment grounding conductor of the branch circuit or feeder as required or permitted by Article 250, Parts I, V, VI, and VII. Moving parts, other than removable accessories, or attachments that have metal-to-metal bearing surfaces, shall be considered to be electrically bonded to each other through bearing surfaces for the purpose of establishing an effective ground-fault current path. The trolley frame and bridge frame shall not be considered as electrically bonded through the bridge and trolley wheels and its respective tracks. A separate bonding conductor shall be provided.", + "displayTitle": "610.61 Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#610.61" + } + ], + "url": "https://2023.antflix.net#610" + }, + { + "displayTitle": "Article 620 Elevators, Dumbwaiters, Escalators, Moving Walks, Platform Lifts, and Stairway Chairlifts", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_92_I" + }, + { + "body": "This article covers the installation of electrical equipment and wiring used in connection with elevators, dumbwaiters, escalators, moving walks, platform lifts, and stairway chairlifts. Informational Note No. 1: See ASME A17.1/CSA B44, Safety Code for Elevators and Escalators, for information on the installation of elevators and escalators. Informational Note No. 2: See CSA B44.1/ASME A17.5, Elevator and escalator electrical equipment, for information on elevator and escalator electrical equipment. Informational Note No. 3: See ASME A18.1, Safety Standard for Platform Lifts and Stairway Chairlifts, for information on installation of platform lifts and stairway chairlifts. The term wheelchair lift has been changed to platform lift. Informational Note No. 4: The motor controller, motion controller, and operation controller are located in a single enclosure or a combination of enclosures. Informational Note No. 5: See Informational Note Figure 620.1 for information only. Informational Note Figure 620.1 Control System.", + "displayTitle": "620.1 Scope", + "children": [], + "url": "https://2023.antflix.net#620.1" + }, + { + "body": "The supply voltage shall not exceed 300 volts between conductors unless otherwise permitted in 620.3(A) through (C).", + "displayTitle": "620.3 Voltage Limitations", + "children": [ + { + "body": "Branch circuits to door operator controllers and door motors and branch circuits and feeders to motor controllers, driving machine motors, machine brakes, and motor-generator sets shall not have a circuit voltage in excess of 1000 volts. Internal voltages of power conversion equipment and functionally associated equipment, and the operating voltages of wiring interconnecting the equipment, shall be permitted to be higher, provided that all such equipment and wiring shall be listed for the higher voltages. Where the voltage exceeds 600 volts, warning labels or signs that read \"DANGER - HIGH VOLTAGE\" shall be attached to the equipment and shall be plainly visible. The danger sign(s) or label(s) shall comply with 110.21(B).", + "displayTitle": "(A) Power Circuits", + "children": [], + "url": "https://2023.antflix.net#620.3_(A)" + }, + { + "body": "Lighting circuits shall comply with the requirements of Article 410.", + "displayTitle": "(B) Lighting Circuits", + "children": [], + "url": "https://2023.antflix.net#620.3_(B)" + }, + { + "body": "Branch circuits for heating and air-conditioning equipment located on the elevator car shall not have a circuit voltage in excess of 1000 volts.", + "displayTitle": "(C) Heating and Air-Conditioning Circuits", + "children": [], + "url": "https://2023.antflix.net#620.3_(C)" + } + ], + "url": "https://2023.antflix.net#620.3" + }, + { + "body": "All live parts of electrical apparatus in the hoistways, at the landings, in or on the cars of elevators and dumbwaiters, in the wellways or the landings of escalators or moving walks, or in the runways and machinery spaces of platform lifts and stairway chairlifts shall be enclosed to protect against accidental contact. Informational Note: See 110.27 for guarding of live parts (1000 volts, nominal, or less).", + "displayTitle": "620.4 Live Parts Enclosed", + "children": [], + "url": "https://2023.antflix.net#620.4" + }, + { + "body": "Working space shall be provided about controllers, disconnecting means, and other electrical equipment in accordance with 110.26(A). Where conditions of maintenance and supervision ensure that only qualified persons examine, adjust, service, and maintain the equipment, the clearance requirements of 110.26(A) shall not be required where any of the conditions in 620.5(A) through (D) are met.", + "displayTitle": "620.5 Working Clearances", + "children": [ + { + "body": "Electrical equipment in the following is provided with flexible leads to all external connections so that it can be repositioned to meet the clear working space requirements of 110.26: Controllers and disconnecting means for dumbwaiters, escalators, moving walks, platform lifts, and stairway chair-lifts installed in the same space with the driving machineControllers and disconnecting means for elevators installed in the hoistway or on the carControllers for door operatorsOther electrical equipment installed in the hoistway or on the car", + "displayTitle": "(A) Flexible Connections to Equipment", + "children": [], + "url": "https://2023.antflix.net#620.5_(A)" + }, + { + "body": "Live parts of the electrical equipment are suitably guarded, isolated, or insulated to reduce the likelihood of inadvertent contact with live parts operating at voltages greater than 30 volts ac rms, 42 volts ac peak, or 60 volts dc, and the equipment can be examined, adjusted, serviced, or maintained while energized without removal of this protection.", + "displayTitle": "(B) Guards", + "children": [], + "url": "https://2023.antflix.net#620.5_(B)" + }, + { + "body": "Electrical equipment is not required to be examined, adjusted, serviced, or maintained while energized.", + "displayTitle": "(C) Examination, Adjusting, and Servicing", + "children": [], + "url": "https://2023.antflix.net#620.5_(C)" + }, + { + "body": "Uninsulated parts are at a voltage not greater than 30 volts rms, 42 volts peak, or 60 volts dc.", + "displayTitle": "(D) Low Voltage", + "children": [], + "url": "https://2023.antflix.net#620.5_(D)" + } + ], + "url": "https://2023.antflix.net#620.5" + }, + { + "displayTitle": "620.6 Ground-Fault Circuit-Interrupter Protection for Personnel", + "children": [ + { + "body": "Each 125-volt, single-phase, 15- and 20-ampere receptacle installed in pits, in hoistways, on the cars of elevators and dumbwaiters associated with wind turbine tower elevators, on the platforms or in the runways and machinery spaces of platform lifts and stairway chairlifts, and in escalator and moving walk wellways shall be a listed Class A ground-fault circuit-interrupter type.", + "displayTitle": "(A) Pits, Hoistways, and on Cars", + "children": [], + "url": "https://2023.antflix.net#620.6_(A)" + }, + { + "body": "All 125-volt, single-phase, 15- and 20-ampere receptacles installed in machine rooms, control spaces, machinery spaces, control rooms, and truss interiors shall have listed Class A ground-fault circuit-interrupter protection for personnel.", + "displayTitle": "(B) Machine Rooms, Control Spaces, Machinery Spaces, Control Rooms, and Truss Interiors", + "children": [], + "url": "https://2023.antflix.net#620.6_(B)" + }, + { + "body": "A permanently installed sump pump shall be permanently wired or shall be supplied by a receptacle that is protected by a listed Class A ground-fault circuit-interrupter.", + "displayTitle": "(C) Sump Pumps", + "children": [], + "url": "https://2023.antflix.net#620.6_(C)" + } + ], + "url": "https://2023.antflix.net#620.6" + }, + { + "displayTitle": "Part II Conductors", + "children": [], + "url": "https://2023.antflix.net#divider_92_II" + }, + { + "body": "The insulation of conductors shall comply with 620.11(A) through (D). Informational Note: See UL 2556-2015, Wire and Cable Test Methods, for one method of determining that the insulation of conductors is flame retardant by testing the conductors or cables to the FV-2/VW-1 Test.", + "displayTitle": "620.11 Insulation of Conductors", + "children": [ + { + "body": "The conductors to the hoistway door interlocks from the hoistway riser shall be one of the following: Flame retardant and suitable for a temperature of not less than 200\u00b0C (392\u00b0F). Conductors shall be Type SF or equivalent.Physically protected using an approved method, such that the conductor assembly is flame retardant and suitable for a temperature of not less than 200\u00b0C (392\u00b0F).", + "displayTitle": "(A) Hoistway Door Interlock Wiring", + "children": [], + "url": "https://2023.antflix.net#620.11_(A)" + }, + { + "body": "Traveling cables used as flexible connections between the elevator or dumbwaiter car or counterweight and the raceway shall be of the types of elevator cable listed in Table 400.4 or other approved types.", + "displayTitle": "(B) Traveling Cables", + "children": [], + "url": "https://2023.antflix.net#620.11_(B)" + }, + { + "body": "All conductors in raceways shall have flame retardant insulation. Conductors shall be Type MTW, TF, TFF, TFN, TFFN, THHN, THW, THWN, TW, XHHW, hoistway cable, or any other conductor with insulation designated as flame retardant. Shielded conductors shall be permitted if such conductors are insulated for the maximum nominal circuit voltage applied to any conductor within the cable or raceway system.", + "displayTitle": "(C) Other Wiring", + "children": [], + "url": "https://2023.antflix.net#620.11_(C)" + }, + { + "body": "All conductors shall have an insulation voltage rating equal to at least the maximum nominal circuit voltage applied to any conductor within the enclosure, cable, or raceway. Insulations and outer coverings that are marked for limited smoke and are so listed shall be permitted.", + "displayTitle": "(D) Insulation", + "children": [], + "url": "https://2023.antflix.net#620.11_(D)" + } + ], + "url": "https://2023.antflix.net#620.11" + }, + { + "body": "The minimum size of conductors, other than conductors that form an integral part of control equipment, shall be in accordance with 620.12(A) and (B).", + "displayTitle": "620.12 Minimum Size of Conductors", + "children": [ + { + "displayTitle": "(A) Traveling Cables", + "children": [ + { + "body": "For lighting circuits, 14 AWG copper, 20 AWG copper or larger conductors shall be permitted in parallel, provided the ampacity is equivalent to at least that of 14 AWG copper.", + "displayTitle": "(1) Lighting Circuits", + "children": [], + "url": "https://2023.antflix.net#620.12_(A)_(1)" + }, + { + "body": "Communications cables used for Class 2 or communications circuits shall have a current limit equal to or greater than the current required to power the powered Class 2 or communications device. Communications cables shall comply with 800.179. The minimum conductor size for communications circuits shall be 24 AWG.", + "displayTitle": "(2) Class 2 and Communications Circuits", + "children": [], + "url": "https://2023.antflix.net#620.12_(A)_(2)" + }, + { + "body": "For other circuits, the minimum size conductor shall be 20 AWG copper.", + "displayTitle": "(3) Other Circuits", + "children": [], + "url": "https://2023.antflix.net#620.12_(A)_(3)" + }, + { + "body": "Where ampacity requirements or voltage drop conditions in a traveling cable circuit prevent the use of a single conductor of AWG 14 or smaller, conductors shall be permitted in parallel in compliance with all the following: Each conductor shall be no smaller than 20 AWG copper.The paralleled conductors shall be the same type and have the same ampacity rating.No more than 3 conductors shall be paralleled.The overcurrent protection shall be such that the ampacity of each individual conductor will not be exceeded if one of the parallel conductors becomes inadvertently disconnected.", + "displayTitle": "(4) Paralleled Conductors", + "children": [], + "url": "https://2023.antflix.net#620.12_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#620.12_(A)" + }, + { + "body": "24 AWG copper. Smaller size listed conductors shall be permitted.", + "displayTitle": "(B) Other Wiring", + "children": [], + "url": "https://2023.antflix.net#620.12_(B)" + } + ], + "url": "https://2023.antflix.net#620.12" + }, + { + "body": "Conductors shall have an ampacity in accordance with 620.13(A) through (D). With generator field control, the conductor ampacity shall be based on the nameplate current rating of the driving motor of the motor-generator set that supplies power to the elevator motor. Informational Note No. 1: The heating of conductors depends on root-mean-square current values, which, with generator field control, are reflected by the nameplate current rating of the motor-generator driving motor rather than by the rating of the elevator motor, which represents actual but short-time and intermittent full-load current values. Informational Note No. 2: See Informational Note Figure 620.13.", + "displayTitle": "620.13 Feeder and Branch-Circuit Conductors", + "children": [ + { + "body": "Conductors supplying a single motor shall have an ampacity not less than the percentage of motor nameplate current determined from 430.22(A) and (E). Informational Note: Some elevator motor currents, or those motor currents of similar function, exceed the motor nameplate value. Heating of the motor and conductors is dependent on the root-mean square (rms) current value and the length of operation time. Because this motor application is inherently intermittent duty, conductors are sized for duty cycle service as shown in Table 430.22(E).", + "displayTitle": "(A) Conductors Supplying Single Motor", + "children": [], + "url": "https://2023.antflix.net#620.13_(A)" + }, + { + "body": "Conductors supplying a single motor controller shall have an ampacity not less than the motor controller nameplate current rating, plus all other connected loads. Motor controller nameplate current ratings shall be permitted to be derived based on the rms value of the motor current using an intermittent duty cycle and other control system loads, if present.", + "displayTitle": "(B) Conductors Supplying a Single Motor Controller", + "children": [], + "url": "https://2023.antflix.net#620.13_(B)" + }, + { + "body": "Conductors supplying a single power transformer shall have an ampacity not less than the nameplate current rating of the power transformer plus all other connected loads. Informational Note No. 1: The nameplate current rating of a power transformer supplying a motor controller reflects the nameplate current rating of the motor controller at line voltage (transformer primary). Informational Note No. 2: See Informative Annex D, Example No. D10.", + "displayTitle": "(C) Conductors Supplying a Single Power Transformer", + "children": [], + "url": "https://2023.antflix.net#620.13_(C)" + }, + { + "body": "Conductors supplying more than one motor, motor controller, or power transformer shall have an ampacity not less than the sum of the nameplate current ratings of the equipment plus all other connected loads. The ampere ratings of motors to be used in the summation shall be determined from Table 430.22(E), 430.24, and 430.24, Exception No. 1. Informational Note: See Informative Annex D, Example Nos. D9 and D10. Informational Note Figure 620.13 Single-Line Diagram.", + "displayTitle": "(D) Conductors Supplying More Than One Motor, Motor Controller, or Power Transformer", + "children": [], + "url": "https://2023.antflix.net#620.13_(D)" + } + ], + "url": "https://2023.antflix.net#620.13" + }, + { + "body": "Feeder conductors of less ampacity than required by 620.13 shall be permitted, subject to the requirements of Table 620.14. Table 620.14 Feeder Demand Factors for Elevators Number of Elevators on a Single Feeder Demand Factor* 1 1.00 2 0.95 3 0.90 4 0.85 5 0.82 6 0.79 7 0.77 8 0.75 9 0.73 10 or more 0.72 * Demand factors are based on 50 percent duty cycle (i.e., half time on and half time off).", + "displayTitle": "620.14 Feeder Demand Factor", + "children": [], + "url": "https://2023.antflix.net#620.14" + }, + { + "body": "The motor controller rating shall comply with 430.83. The rating shall be permitted to be less than the nominal rating of the elevator motor, when the controller inherently limits the available power to the motor and is marked as power limited. Informational Note: See 430.8 for controller markings.", + "displayTitle": "620.15 Motor Controller Rating", + "children": [], + "url": "https://2023.antflix.net#620.15" + }, + { + "displayTitle": "620.16 Short-Circuit Current Rating", + "children": [ + { + "body": "Where an elevator control panel is installed, it shall be marked with its short-circuit current rating, based on one of the following: Short-circuit current rating of a listed assemblyShort-circuit current rating established utilizing an approved methodInformational Note: UL 508A-2013, Standard for Industrial Control Panels, Supplement SB, is an example of an approved method.", + "displayTitle": "(A) Marking", + "children": [], + "url": "https://2023.antflix.net#620.16_(A)" + }, + { + "body": "The elevator control panel shall not be installed where the available fault current exceeds its short-circuit current rating, as marked in accordance with 620.16(A).", + "displayTitle": "(B) Installation", + "children": [], + "url": "https://2023.antflix.net#620.16_(B)" + } + ], + "url": "https://2023.antflix.net#620.16" + }, + { + "displayTitle": "Part III Wiring", + "children": [], + "url": "https://2023.antflix.net#divider_81_III" + }, + { + "body": "Conductors, cables, and optical fiber cables located in hoistways, escalator and moving walk wellways, platform lifts, stairway chairlift runways, machinery spaces, control spaces, in or on cars, machine rooms, and control rooms, not including the traveling cables connecting the car or counterweight and hoistway wiring, shall be installed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, rigid nonmetallic conduit, or wireways, or shall be Type MC, MI, or AC cable unless otherwise permitted in 620.21(A) through (C). Unused conductors in an enclosure shall be insulated or protected from accidental contact with exposed live parts. Exception: Cords and cables of listed cord-and-plug-connected equipment shall not be required to be installed in a raceway. Informational Note: When an elevator is classified as a fire service access elevator or occupant evacuation operation elevator, some building codes require additional protection for conductors that are located outside of the elevator hoistway and machine room.", + "displayTitle": "620.21 Wiring Methods", + "children": [ + { + "displayTitle": "(A) Elevators", + "children": [ + { + "body": "Types CL2P, CL2R, and CL2 cables shall be permitted, provided the cables are supported and protected from physical damage. Substitute cables for Class 2 cables installed in accordance with 722.135(E) shall be permitted.Flexible cords and cables that are components of listed equipment and used in circuits operating at 30 volts rms or less or 42 volts dc or less shall be permitted, provided the cords and cables are supported and protected from physical damage and are of a jacketed and flame-retardant type.The following wiring methods shall be permitted in the hoistway in lengths not to exceed 1.8 m (6 ft):Flexible metal conduit.Liquidtight flexible metal conduit.Liquidtight flexible nonmetallic conduit.Flexible cords and cables, or conductors grouped together and taped or corded, shall be permitted to be installed without a raceway. They shall be located to be protected from physical damage, shall be of a flame retardant type, and shall be part of one of the following:Listed equipmentDriving machineDriving machine brakeException to 620.21(A)(1)(c)(1), (A)(1)(c)(2), and (A)(1)(c)(3): The conduit length shall not be required to be limited between risers and limit switches, interlocks, operating buttons, and similar devices.A sump pump or oil recovery pump located in the pit shall be permitted to be cord connected. The cord shall be a hard usage oil-resistant type, of a length not to exceed 1.8 m (6 ft), and shall be located to be protected from physical damage.Hard-service cords and junior hard-service cords that conform to the requirements of Article 400 (Table 400.4) shall be permitted as flexible connections between the fixed wiring in the hoistway and hoistway access switches when located in the hoistway door sight guard.Informational Note: See ASME A17.1-2019/CSA B44-19, Safety Code for Elevators and Escalators.", + "displayTitle": "(1) Hoistways and Pits", + "children": [], + "url": "https://2023.antflix.net#620.21_(A)_(1)" + }, + { + "body": "Flexible metal conduit, liquidtight flexible metal conduit, or liquidtight flexible nonmetallic conduit of metric designator 12 (trade size 3/8), or larger, not exceeding 1.8 m (6 ft) in length, shall be permitted on cars where so located as to be free from oil and if securely fastened in place.Exception: Liquidtight flexible nonmetallic conduit (LFNC-B) of metric designator 12 (trade size 3/8) or larger shall be permitted in lengths in excess of 1.8 m (6 ft).Hard-service cords and junior hard-service cords that conform to the requirements of Article 400 (Table 400.4) shall be permitted as flexible connections between the fixed wiring on the car and devices on the car doors or gates. Hard-service cords only shall be permitted as flexible connections for the top-of-car operating device or the car-top work light. Devices or luminaires shall be grounded by means of an equipment grounding conductor run with the circuit conductors. Cables with smaller conductors and other types and thicknesses of insulation and jackets shall be permitted as flexible connections between the fixed wiring on the car and devices on the car doors or gates, if listed for this use.Flexible cords and cables that are components of listed equipment and used in circuits operating at 30 volts rms or less or 42 volts dc or less shall be permitted, provided the cords and cables are supported and protected from physical damage and are of a jacketed and flame-retardant type.The following wiring methods shall be permitted on the car assembly in lengths not to exceed 1.8 m (6 ft):Flexible metal conduitLiquidtight flexible metal conduitLiquidtight flexible nonmetallic conduitFlexible cords and cables, or conductors grouped together and taped or corded, shall be permitted to be installed without a raceway. They shall be located to be protected from physical damage and shall be of a flame retardant type and shall be part of one of the following:Listed equipmentA driving machineA driving machine brake", + "displayTitle": "(2) Cars", + "children": [], + "url": "https://2023.antflix.net#620.21_(A)_(2)" + }, + { + "body": "Flexible metal conduit, liquidtight flexible metal conduit, or liquidtight flexible nonmetallic conduit of metric designator 12 (trade size 3/8), or larger, not exceeding 1.8 m (6 ft) in length, shall be permitted between control panels and machine motors, machine brakes, motor-generator sets, disconnecting means, and pumping unit motors and valves.Exception: Liquidtight flexible nonmetallic conduit (LFNC-B) metric designator 12 (trade size 3/8) or larger shall be permitted to be installed in lengths in excess of 1.8 m (6 ft).Where motor-generators, machine motors, or pumping unit motors and valves are located adjacent to or underneath control equipment and are provided with extra-length terminal leads not exceeding 1.8 m (6 ft) in length, such leads shall be permitted to be extended to connect directly to controller terminal studs without regard to the carrying capacity requirements of Articles 430 and 445. Auxiliary gutters shall be permitted in machine and control rooms between controllers, starters, and similar apparatus.Flexible cords and cables that are components of listed equipment and used in circuits operating at 30 volts rms or less or 42 volts dc or less shall be permitted, provided the cords and cables are supported and protected from physical damage and are of a jacketed and flame-retardant type.On existing or listed equipment, conductors shall also be permitted to be grouped together and taped or corded without being installed in a raceway. Such cable groups shall be supported at intervals not over 900 mm (3 ft) and located so as to be protected from physical damage.Flexible cords and cables in lengths not to exceed 1.8 m (6 ft) that are of a flame-retardant type and located to be protected from physical damage shall be permitted in these rooms and spaces without being installed in a raceway. They shall be part of one of the following:Listed equipmentA driving machineA driving machine brake", + "displayTitle": "(3) Within Machine Rooms, Control Rooms, and Machinery Spaces and Control Spaces", + "children": [], + "url": "https://2023.antflix.net#620.21_(A)_(3)" + }, + { + "body": "The following wiring methods shall be permitted on the counterweight assembly in lengths not to exceed 1.8 m (6 ft): Flexible metal conduitLiquidtight flexible metal conduitLiquidtight flexible nonmetallic conduitFlexible cords and cables, or conductors grouped together and taped or corded, shall be permitted to be installed without a raceway. They shall be located to be protected from physical damage, shall be of a flame retardant type, and shall be part of one of the following:Listed equipmentA driving machineA driving machine brake", + "displayTitle": "(4) Counterweight", + "children": [], + "url": "https://2023.antflix.net#620.21_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#620.21_(A)" + }, + { + "displayTitle": "(B) Escalators", + "children": [ + { + "body": "Flexible metal conduit, liquidtight flexible metal conduit, or liquidtight flexible nonmetallic conduit shall be permitted in escalator and moving walk wellways. Flexible metal conduit or liquidtight flexible conduit of metric designator 12 (trade size 3/8) shall be permitted in lengths not in excess of 1.8 m (6 ft). Exception: Metric designator 12 (trade size 3/8), nominal or larger liquidtight flexible nonmetallic conduit (LFNC-B) shall be permitted to be installed in lengths in excess of 1.8 m (6 ft).", + "displayTitle": "(1) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#620.21_(B)_(1)" + }, + { + "body": "Types CL2P, CL2R, and CL2 cables shall be permitted to be installed within escalators and moving walkways, provided the cables are supported and protected from physical damage. Substitute cables for Class 2 cables installed in accordance with 722.135(E) shall be permitted.", + "displayTitle": "(2) Class 2 Circuit Cables", + "children": [], + "url": "https://2023.antflix.net#620.21_(B)_(2)" + }, + { + "body": "Hard-service cords that conform to the requirements of Article 400 (Table 400.4) shall be permitted as flexible connections on escalators and moving walk control panels and disconnecting means where the entire control panel and disconnecting means are arranged for removal from machine spaces as permitted in 620.5.", + "displayTitle": "(3) Flexible Cords", + "children": [], + "url": "https://2023.antflix.net#620.21_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#620.21_(B)" + }, + { + "displayTitle": "(C) Platform Lifts and Stairway Chairlift Raceways", + "children": [ + { + "body": "Flexible metal conduit or liquidtight flexible metal conduit shall be permitted in platform lifts and stairway chairlift runways and machinery spaces. Flexible metal conduit or liquidtight flexible conduit of metric designator 12 (trade size 3/8) shall be permitted in lengths not in excess of 1.8 m (6 ft). Exception: Metric designator 12 (trade size 3/8) or larger liquidtight flexible nonmetallic conduit (LFNC-B) shall be permitted to be installed in lengths in excess of 1.8 m (6 ft).", + "displayTitle": "(1) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#620.21_(C)_(1)" + }, + { + "body": "Types CL2P, CL2R, and CL2 cables shall be permitted to be installed within platform lifts and stairway chairlift runways and machinery spaces, provided the cables are supported and protected from physical damage. Substitute cables for Class 2 cables installed in accordance with 722.135(E) shall be permitted.", + "displayTitle": "(2) Class 2 Circuit Cables", + "children": [], + "url": "https://2023.antflix.net#620.21_(C)_(2)" + }, + { + "body": "Flexible cords and cables that are components of listed equipment and used in circuits operating at 30 volts rms or less or 42 volts dc or less shall be permitted in lengths not to exceed 1.8 m (6 ft), provided the cords and cables are supported and protected from physical damage and are of a jacketed and flame-retardant type.", + "displayTitle": "(3) Flexible Cords and Cables", + "children": [], + "url": "https://2023.antflix.net#620.21_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#620.21_(C)" + } + ], + "url": "https://2023.antflix.net#620.21" + }, + { + "displayTitle": "620.22 Branch Circuits for Car Lighting, Receptacle(s), Ventilation, Heating, and Air-Conditioning", + "children": [ + { + "body": "A separate branch circuit shall supply the car lights. The car lights branch circuit shall be permitted to supply receptacles (alarm devices, emergency responder radio coverage (ERRC), car ventilation purification systems, monitoring devices not part of the control system), auxiliary lighting power source, car emergency signaling, communications devices (including their associated charging circuits), and ventilation on each elevator car or inside the operation controller. The overcurrent device protecting the branch circuit shall be located in the elevator machine room, control room, machinery space, or control space. Where there is no machine room, control room, machinery space, or control space outside the hoistway, the overcurrent device shall be located outside the hoistway and accessible to qualified persons only. Required lighting shall not be connected to the load side of a ground-fault circuit interrupter.", + "displayTitle": "(A) Car Light Receptacles, Auxiliary Lighting, and Ventilation", + "children": [], + "url": "https://2023.antflix.net#620.22_(A)" + }, + { + "body": "A separate branch circuit shall supply the air-conditioning and heating units on each elevator car. The overcurrent device protecting the branch circuit shall be located in the elevator machine room, control room, machinery space, or control space. Where there is no machine room, control room, machinery space, or control space outside the hoistway, the overcurrent device shall be located outside the hoistway and accessible only to qualified persons.", + "displayTitle": "(B) Air-Conditioning and Heating Source", + "children": [], + "url": "https://2023.antflix.net#620.22_(B)" + } + ], + "url": "https://2023.antflix.net#620.22" + }, + { + "displayTitle": "620.23 Branch Circuits for Machine Room, Control Room/Machinery Space, Control Space, or Truss Interior Lighting and Receptacle(s)", + "children": [ + { + "body": "The branch circuits supplying the lighting for machine rooms, control rooms, machinery spaces, control spaces, or truss interiors, where required, shall be separate from the branch circuits supplying the receptacles in those places. These circuits shall supply no other loads. Required lighting shall not be connected to the load side of a ground-fault circuit interrupter.", + "displayTitle": "(A) Separate Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#620.23_(A)" + }, + { + "body": "The machine room, control room/machinery space, or control space lighting switch shall be located at the point of entry.", + "displayTitle": "(B) Lighting Switch", + "children": [], + "url": "https://2023.antflix.net#620.23_(B)" + }, + { + "body": "At least one 125-volt, single-phase, 15- or 20-ampere duplex receptacle shall be provided in each machine room, control room and machinery space, control space, and in truss interiors where required. Informational Note: See ASME A17.1/CSA B44, Safety Code for Elevators and Escalators, for illumination levels and receptacle requirements.", + "displayTitle": "(C) Duplex Receptacle", + "children": [], + "url": "https://2023.antflix.net#620.23_(C)" + } + ], + "url": "https://2023.antflix.net#620.23" + }, + { + "displayTitle": "620.24 Branch Circuit for Hoistway Pit Lighting and Receptacles", + "children": [ + { + "body": "Separate branch circuits shall supply the hoistway pit lighting and receptacles. Required lighting shall not be connected to the load side of a ground-fault circuit interrupter.", + "displayTitle": "(A) Separate Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#620.24_(A)" + }, + { + "body": "The lighting switch shall be so located as to be readily accessible from the pit access door.", + "displayTitle": "(B) Lighting Switch", + "children": [], + "url": "https://2023.antflix.net#620.24_(B)" + }, + { + "body": "At least one 125-volt, single-phase, 15- or 20-ampere duplex receptacle shall be provided in the hoistway pit. Informational Note No. 1: See ASME A17.1-2016/CSA B44-16, Safety Code for Elevators and Escalators, for illumination levels. Informational Note No. 2: See 620.6 for ground-fault circuit-interrupter requirements.", + "displayTitle": "(C) Duplex Receptacle", + "children": [], + "url": "https://2023.antflix.net#620.24_(C)" + } + ], + "url": "https://2023.antflix.net#620.24" + }, + { + "displayTitle": "620.25 Branch Circuits for Other Utilization Equipment", + "children": [ + { + "body": "Additional branch circuit(s) shall supply utilization equipment not identified in 620.22, 620.23, and 620.24. Other utilization equipment shall be restricted to that equipment identified in 620.1.", + "displayTitle": "(A) Additional Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#620.25_(A)" + }, + { + "body": "The overcurrent devices protecting the branch circuit(s) shall be located in the elevator machine room, control room, machinery space, or control space. Where there is no machine room, control room, machinery space, or control space outside the hoistway, or for escalator and moving walk applications, the overcurrent device shall be located outside the hoistway and accessible only to qualified persons.", + "displayTitle": "(B) Overcurrent Devices", + "children": [], + "url": "https://2023.antflix.net#620.25_(B)" + } + ], + "url": "https://2023.antflix.net#620.25" + }, + { + "displayTitle": "Part IV Installation of Conductors", + "children": [], + "url": "https://2023.antflix.net#divider_28_IV" + }, + { + "body": "The sum of the cross-sectional area of the individual conductors in a wireway shall not be more than 50 percent of the interior cross-sectional area of the wireway. Vertical runs of wireways shall be securely supported at intervals not exceeding 4.5 m (15 ft) and shall have not more than one joint between supports. Adjoining wireway sections shall be securely fastened together to provide a rigid joint.", + "displayTitle": "620.32 Metal Wireways and Nonmetallic Wireways", + "children": [], + "url": "https://2023.antflix.net#620.32" + }, + { + "body": "The sum of the cross-sectional area of the individual conductors in raceways shall not exceed 40 percent of the interior cross-sectional area of the raceway, except as permitted in 620.32 for wireways.", + "displayTitle": "620.33 Number of Conductors in Raceways", + "children": [], + "url": "https://2023.antflix.net#620.33" + }, + { + "body": "Supports for cables or raceways in a hoistway or in an escalator or moving walk wellway or platform lift and stairway chairlift runway shall be securely fastened to the guide rail; escalator or moving walk truss; or to the hoistway, wellway, or runway construction.", + "displayTitle": "620.34 Supports", + "children": [], + "url": "https://2023.antflix.net#620.34" + }, + { + "body": "Auxiliary gutters shall not be subject to the restrictions of 366.10(C) covering length or of 366.22 covering number of conductors.", + "displayTitle": "620.35 Auxiliary Gutters", + "children": [], + "url": "https://2023.antflix.net#620.35" + }, + { + "body": "Optical fiber cables and conductors for operating devices, operation and motion control, power, signaling, fire alarm, lighting, heating, and air-conditioning circuits of 1000 volts or less shall be permitted to be run in the same traveling cable or raceway system if all conductors are insulated for the maximum voltage applied to any conductor within the cables or raceway system and if all live parts of the equipment are insulated from ground for this maximum voltage. Traveling cable or raceway shall also be permitted to include shielded pairs, coaxial cables, and other communications circuits. Type CMP-LP or CMR-LP cables complying with 800.179 shall be permitted in raceways.", + "displayTitle": "620.36 Different Systems in One Raceway or Traveling Cable", + "children": [], + "url": "https://2023.antflix.net#620.36" + }, + { + "displayTitle": "620.37 Wiring in Hoistways, Machine Rooms, Control Rooms, Machinery Spaces, and Control Spaces", + "children": [ + { + "body": "Electrical wiring, raceways, and cables used directly in connection with the elevator or dumbwaiter shall be permitted inside the hoistway, machine rooms, control rooms, machinery spaces, and control spaces, including wiring for the following: SignalsCommunications with the carFire detection systemsPit sump pumpsBranch circuits in 620.24Heating, lighting, and ventilating the hoistwayHeating, air conditioning, lighting, and ventilating the elevator car", + "displayTitle": "(A) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#620.37_(A)" + }, + { + "body": "Bonding of elevator rails (car and/or counterweight) to a lightning protection system down conductor(s) shall be permitted. The lightning protection system down conductor(s) shall not be located within the hoistway. Elevator rails or other hoistway equipment shall not be used as the down conductor for lightning protection systems. Informational Note No. 1: See 250.106 for bonding requirements. Informational Note No. 2: See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, for further information.", + "displayTitle": "(B) Lightning Protection", + "children": [], + "url": "https://2023.antflix.net#620.37_(B)" + }, + { + "body": "Feeders for supplying power to elevators and dumbwaiters shall be installed outside the hoistway unless as follows: By special permission, feeders for elevators shall be permitted within an existing hoistway if no conductors are spliced within the hoistway.Feeders shall be permitted inside the hoistway for elevators with driving machine motors located in the hoistway or on the car or counterweight.", + "displayTitle": "(C) Feeders", + "children": [], + "url": "https://2023.antflix.net#620.37_(C)" + } + ], + "url": "https://2023.antflix.net#620.37" + }, + { + "body": "Electrical equipment and wiring used for elevators, dumbwaiters, escalators, moving walks, and platform lifts and stairway chairlifts in garages shall comply with the requirements of 511.3(A). Informational Note: Garages used for parking or storage and where no repair work is done in accordance with 511.3(A) arc not classified.", + "displayTitle": "620.38 Electrical Equipment in Garages and Similar Occupancies", + "children": [], + "url": "https://2023.antflix.net#620.38" + }, + { + "displayTitle": "Part V Traveling Cables", + "children": [], + "url": "https://2023.antflix.net#divider_22_V" + }, + { + "body": "Traveling cables shall be suspended at the car and hoistways' ends, or counterweight end where applicable, so as to reduce the strain on the individual copper conductors to a minimum. Traveling cables shall be supported, utilizing listed components, by one of the following methods:By their steel supporting member(s)By looping the cables around supports for unsupported lengths less than 30 m (100 ft)By suspending from the supports by a means that automatically tightens around the cable when tension is increased for unsupported lengths up to 60 m (200 ft)Unsupported length for the hoistway suspension means shall be that length of cable measured from the point of suspension in the hoistway to the bottom of the loop, with the elevator car located at the bottom landing. Unsupported length for the car suspension means shall be that length of cable measured from the point of suspension on the car to the bottom of the loop, with the elevator car located at the top landing.", + "displayTitle": "620.41 Suspension of Traveling Cables", + "children": [], + "url": "https://2023.antflix.net#620.41" + }, + { + "body": "In hazardous (classified) locations, traveling cables shall be of a type approved for hazardous (classified) locations as permitted in 501.10(B)(2)(7), 502.10(B)(2)(6), 503.10(A)(3)(6), 505.15(C)(2), and 506.15(A)(6).", + "displayTitle": "620.42 Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#620.42" + }, + { + "body": "Traveling cable supports shall be located so as to reduce to a minimum the possibility of damage due to the cables coming in contact with the hoistway construction or equipment in the hoistway. Where necessary, suitable guards shall be provided to protect the cables against damage.", + "displayTitle": "620.43 Location of and Protection for Cables", + "children": [], + "url": "https://2023.antflix.net#620.43" + }, + { + "body": "Traveling cables that are suitably supported and protected from physical damage shall be permitted to be run without the use of a raceway in either or both of the following: When used inside the hoistway, on the elevator car, hoistway wall, counterweight, or controllers and machinery that are located inside the hoistway, provided the cables are in the original sheath.From inside the hoistway, to elevator controller enclosures and to elevator car and machine room, control room, machinery space, and control space connections that are located outside the hoistway for a distance not exceeding 1.8 m (6 ft) in length as measured from the first point of support on the elevator car or hoistway wall, or counterweight where applicable, provided the conductors are grouped together and taped or corded, or in the original sheath. These traveling cables shall be permitted to be continued to this equipment.", + "displayTitle": "620.44 Installation of Traveling Cables", + "children": [], + "url": "https://2023.antflix.net#620.44" + }, + { + "displayTitle": "Part VI Disconnecting Means and Control", + "children": [], + "url": "https://2023.antflix.net#divider_15_VI" + }, + { + "body": "A single means for disconnecting all ungrounded main power supply conductors for each elevator, dumbwaiter, escalator, moving walk, platform lift, or stairway chairlift shall be provided and be designed so that no pole can be operated independently. Where multiple driving machines are connected to a single elevator, escalator, moving walk, or pumping unit, there shall be one disconnecting means to disconnect the motor(s) and control valve operating magnets. The disconnecting means for the main power supply conductors shall not disconnect the branch circuits required in 620.22, 620.23, and 620.24.", + "displayTitle": "620.51 Disconnecting Means", + "children": [ + { + "body": "The disconnecting means shall be an enclosed externally operable fused motor circuit switch or circuit breaker that is lockable only in the open position in accordance with 110.25. The disconnecting means shall be a listed device. Informational Note No. 1: See ASME A17.1-2019/CSA B44-19, Safety Code for Elevators and Escalators, for additional information. Informational Note No. 2: See ASME A18.1-2017, Safety Standard for Platform Lifts and Stairway Chairlifts, for additional information. Exception No. 1: Where an individual branch circuit supplies a platform lift, the disconnecting means required by 620.51(C)(4) shall be permitted to comply with 430.109(C). This disconnecting means shall be listed and shall be lockable open in accordance with 110.25. Exception No. 2: Where an individual branch circuit supplies a stairway chairlift or where a stairway chairlift is supplied by batteries as the primary source, the stairway chairlift shall be permitted to be cord-and-plug-connected, provided it complies with 422.16(A) and the cord does not exceed 1.8 m (6 ft) in length.", + "displayTitle": "(A) Type", + "children": [], + "url": "https://2023.antflix.net#620.51_(A)" + }, + { + "body": "No provision shall be made to open or close this disconnecting means from any other part of the premises. If sprinklers are installed in hoistways, machine rooms, control rooms, machinery spaces, or control spaces, the disconnecting means shall be permitted to automatically open the power supply to the affected elevator(s) prior to the application of water. No provision shall be made to automatically close this disconnecting means. Power shall only be restored by manual means. Informational Note: To reduce hazards associated with water on live elevator electrical equipment.", + "displayTitle": "(B) Operation", + "children": [], + "url": "https://2023.antflix.net#620.51_(B)" + }, + { + "body": "The disconnecting means shall be located where it is readily accessible to qualified persons.", + "displayTitle": "(C) Location", + "children": [ + { + "body": "On elevators without generator field control, the disconnecting means shall be located within sight of the motor controller. Where the motor controller is located in the elevator hoistway, the disconnecting means required by 620.51(A) shall be located outside the hoistway and accessible to qualified persons only. An additional fused or non-fused, enclosed, externally operable motor circuit switch that is lockable open in accordance with 110.25 to disconnect all ungrounded main power-supply conductors shall be located within sight of the motor controller. The additional switch shall be a listed device and shall comply with 620.91(C). Driving machines or motion and operation controllers not within sight of the disconnecting means shall be provided with a manually operated switch installed in the control circuit to prevent starting. The manually operated switch(es) shall be installed adjacent to this equipment. Where the driving machine of an electric elevator or the hydraulic machine of a hydraulic elevator is located in a remote machine room or remote machinery space, a single means for disconnecting all ungrounded main power-supply conductors shall be provided and be lockable open in accordance with 110.25.", + "displayTitle": "(1) On Elevators Without Generator Field Control", + "children": [], + "url": "https://2023.antflix.net#620.51_(C)_(1)" + }, + { + "body": "On elevators with generator field control, the disconnecting means shall be located within sight of the motor controller for the driving motor of the motor-generator set. Driving machines, motor-generator sets, or motion and operation controllers not within sight of the disconnecting means shall be provided with a manually operated switch installed in the control circuit to prevent starting. The manually operated switch(es) shall be installed adjacent to this equipment. Where the driving machine or the motor-generator set is located in a remote machine room or remote machinery space, a single means for disconnecting all ungrounded main power supply conductors shall be provided and be lockable open in accordance with 110.25.", + "displayTitle": "(2) On Elevators With Generator Field Control", + "children": [], + "url": "https://2023.antflix.net#620.51_(C)_(2)" + }, + { + "body": "On escalators and moving walks, the disconnecting means shall be installed in the space where the controller is located.", + "displayTitle": "(3) On Escalators and Moving Walks", + "children": [], + "url": "https://2023.antflix.net#620.51_(C)_(3)" + }, + { + "body": "On platform lifts and stairway chairlifts, the disconnecting means shall be located within sight of the motor controller.", + "displayTitle": "(4) On Platform Lifts and Stairway Chairlifts", + "children": [], + "url": "https://2023.antflix.net#620.51_(C)_(4)" + } + ], + "url": "https://2023.antflix.net#620.51_(C)" + }, + { + "displayTitle": "(D) Identification and Signs", + "children": [ + { + "body": "The disconnecting means shall be legibly marked in the field with the available fault current at its line terminals. The field marking(s) shall include the date the available fault current calculation was performed and be of sufficient durability to withstand the environment involved. When modifications to the electrical installation occur that affect the available fault current at the disconnecting means, the available fault current shall be verified or recalculated as necessary to ensure the elevator equipment's short-circuit current rating is sufficient for the available fault current at the line terminals of the equipment. The required field marking(s) shall be adjusted to reflect the new level of available fault current.", + "displayTitle": "(1) Available Fault Current Field Marking", + "children": [], + "url": "https://2023.antflix.net#620.51_(D)_(1)" + } + ], + "url": "https://2023.antflix.net#620.51_(D)" + }, + { + "body": "Where any of the disconnecting means in 620.51 has been designated as supplying an emergency system load, a legally required system load, or a critical operation power system load, a listed SPD shall be installed.", + "displayTitle": "(E) Surge Protection", + "children": [], + "url": "https://2023.antflix.net#620.51_(E)" + } + ], + "url": "https://2023.antflix.net#620.51" + }, + { + "displayTitle": "620.52 Power From More Than One Source", + "children": [ + { + "body": "On single-car and multicar installations, equipment receiving electrical power from more than one source shall be provided with a disconnecting means for each source of electrical power. The disconnecting means shall be within sight of the equipment served.", + "displayTitle": "(A) Single-Car and Multicar Installations", + "children": [], + "url": "https://2023.antflix.net#620.52_(A)" + }, + { + "body": "Where multiple disconnecting means are used and parts of the controllers remain energized from a source other than the one disconnected, a warning sign shall be mounted on or next to the disconnecting means. The sign shall be clearly legible and shall read as follows: WARNING PARTS OF THE CONTROLLER ARE NOT DE-ENERGIZED BY THIS SWITCH. The warning sign(s) or label(s) shall comply with 110.21 (B).", + "displayTitle": "(B) Warning Sign for Multiple Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#620.52_(B)" + }, + { + "body": "Where interconnections between controllers are necessary for the operation of the system on multicar installations that remain energized from a source other than the one disconnected, a warning sign in accordance with 620.52(B) shall be mounted on or next to the disconnecting means.", + "displayTitle": "(C) Interconnection Multicar Controllers", + "children": [], + "url": "https://2023.antflix.net#620.52_(C)" + } + ], + "url": "https://2023.antflix.net#620.52" + }, + { + "body": "Elevators shall have a single means for disconnecting all ungrounded car light, receptacle(s), and ventilation power supply conductors for that elevator car. The disconnecting means shall be an enclosed, externally operable, fused motor-circuit switch or circuit breaker that is lockable open in accordance with 110.25 and shall be located in the machine room or control room for that elevator car. Where there is no machine room or control room outside the hoistway, the disconnecting means shall be located outside the hoistway and accessible to qualified persons only. Disconnecting means shall be numbered to correspond to the identifying number of the elevator car whose light source they control. The disconnecting means shall be provided with a sign to identify the location of the supply side overcurrent protective device. Exception: Where a separate branch circuit supplies car lighting, a receptacle(s), and a ventilation motor not exceeding 2 hp, the disconnecting means required by 620.53 shall be permitted to comply with 430.109(C). This disconnecting means shall be listed and shall be lockable open in accordance with 110.25.", + "displayTitle": "620.53 Car Light, Receptacle(s), and Ventilation Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#620.53" + }, + { + "body": "Elevators shall have a single means for disconnecting all ungrounded car heating and air-conditioning power-supply conductors for that elevator car. The disconnecting means shall be an enclosed, externally operable, fused motor-circuit switch or circuit breaker that is lockable open in accordance with 110.25 and shall be located in the machine room or control room for that elevator car. Where there is no machine room or control room outside the hoistway, the disconnecting means shall be located outside the hoistway and accessible to qualified persons only. Where there is equipment for more than one elevator car in the machine room, the disconnecting means shall be numbered to correspond to the identifying number of the elevator car whose heating and air-conditioning source they control. The disconnecting means shall be provided with a sign to identify the location of the supply side overcurrent protective device.", + "displayTitle": "620.54 Heating and Air-Conditioning Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#620.54" + }, + { + "body": "Each branch circuit for other utilization equipment shall have a single means for disconnecting all ungrounded conductors. The disconnecting means shall be lockable open in accordance with 110.25. Where there is more than one branch circuit for other utilization equipment, the disconnecting means shall be numbered to correspond to the identifying number of the equipment served. The disconnecting means shall be provided with a sign to identify the location of the supply side overcurrent protective device.", + "displayTitle": "620.55 Utilization Equipment Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#620.55" + }, + { + "displayTitle": "Part VII Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#divider_13_VII" + }, + { + "body": "Overcurrent protection shall be provided in accordance with 620.61 (A) through (D).", + "displayTitle": "620.61 Overcurrent Protection", + "children": [ + { + "body": "Operating devices and control and signaling circuits shall be protected against overcurrent in accordance with 724.43 and 724.45. Class 2 power-limited circuits shall be protected against overcurrent in accordance with Chapter 9, Notes to Tables 11 (A) and 11 (B).", + "displayTitle": "(A) Operating Devices and Control and Signaling Circuits", + "children": [], + "url": "https://2023.antflix.net#620.61_(A)" + }, + { + "body": "Motor and branch-circuit overload protection shall conform to Article 430, Part III, and 620.61(B)(1) through (B)(4).", + "displayTitle": "(B) Overload Protection for Motors", + "children": [ + { + "body": "Duty on elevator and dumbwaiter driving machine motors and driving motors of motor-generators used with generator field control shall be rated as intermittent. Such motors shall be permitted to be protected against overload in accordance with 430.33.", + "displayTitle": "(1) Duty Rating on Elevator, Dumbwaiter, and Motor-Generator Sets Driving Motors", + "children": [], + "url": "https://2023.antflix.net#620.61_(B)_(1)" + }, + { + "body": "Duty on escalator and moving walk driving machine motors shall be rated as continuous. Such motors shall be protected against overload in accordance with 430.32.", + "displayTitle": "(2) Duty Rating on Escalator Motors", + "children": [], + "url": "https://2023.antflix.net#620.61_(B)_(2)" + }, + { + "body": "Escalator and moving walk driving machine motors and driving motors of motor-generator sets shall be protected against running overload as provided in Table 430.37.", + "displayTitle": "(3) Overload Protection", + "children": [], + "url": "https://2023.antflix.net#620.61_(B)_(3)" + }, + { + "body": "Duty on platform lift and stairway chairlift driving machine motors shall be rated as intermittent. Such motors shall be permitted to be protected against overload in accordance with 430.33. Informational Note: See 430.44 for further information for orderly shutdown.", + "displayTitle": "(4) Duty Rating and Overload Protection on Platform Lift and Stairway Chairlift Motors", + "children": [], + "url": "https://2023.antflix.net#620.61_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#620.61_(B)" + }, + { + "body": "Motor feeder short-circuit and ground-fault protection shall be as required in Article 430, Part V.", + "displayTitle": "(C) Motor Feeder Short-Circuit and Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#620.61_(C)" + }, + { + "body": "Motor branch-circuit short-circuit and ground-fault protection shall be as required in Article 430, Part IV.", + "displayTitle": "(D) Motor Branch-Circuit Short-Circuit and Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#620.61_(D)" + } + ], + "url": "https://2023.antflix.net#620.61" + }, + { + "body": "Where more than one driving machine disconnecting means is supplied by the same source, the overcurrent protective devices in each disconnecting means shall be selectively coordinated with any other supply-side overcurrent protective devices. Selective coordination shall be selected by a licensed professional engineer or other qualified person engaged primarily in the design, installation, or maintenance of electrical systems. The selection and device settings shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device.", + "displayTitle": "620.62 Selective Coordination", + "children": [], + "url": "https://2023.antflix.net#620.62" + }, + { + "body": "Equipment enclosures containing selectively coordinated overcurrent devices shall be legibly marked in the field to indicate that the overcurrent devices are selectively coordinated. The marking shall meet the requirements of 110.21(B), shall be readily visible, and shall state the following: CAUTION: OVERCURRENT DEVICES IN THIS ENCLOSURE ARE SELECTIVELY COORDINATED. EQUIVALENT REPLACEMENTS AND TRIP SETTINGS ARE REQUIRED.", + "displayTitle": "620.65 Signage", + "children": [], + "url": "https://2023.antflix.net#620.65" + }, + { + "displayTitle": "Part VIII Machine Rooms, Control Rooms, Machinery Spaces, and Control Spaces", + "children": [], + "url": "https://2023.antflix.net#divider_6_VIII" + }, + { + "body": "Elevator, dumbwaiter, escalator, and moving walk driving machines; motor-generator sets; motor controllers; and disconnecting means shall be installed in a room or space set aside for that purpose unless otherwise permitted in 620.71(A) or (B). The room or space shall be secured against unauthorized access.", + "displayTitle": "620.71 Guarding Equipment", + "children": [ + { + "body": "Motor controllers shall be permitted outside the spaces herein specified, provided they are in enclosures with doors or removable panels that are capable of being locked in the closed position and the disconnecting means is located adjacent to or is an integral part of the motor controller. Motor controller enclosures for escalator or moving walks shall be permitted in the balustrade on the side located away from the moving steps or moving treadway. If the disconnecting means is an integral part of the motor controller, it shall be operable without opening the enclosure.", + "displayTitle": "(A) Motor Controllers", + "children": [], + "url": "https://2023.antflix.net#620.71_(A)" + }, + { + "body": "Elevators with driving machines located on the car, on the counterweight, or in the hoistway, and driving machines for dumbwaiters, platform lifts, and stairway lifts, shall be permitted outside the spaces herein specified.", + "displayTitle": "(B) Driving Machines", + "children": [], + "url": "https://2023.antflix.net#620.71_(B)" + } + ], + "url": "https://2023.antflix.net#620.71" + }, + { + "displayTitle": "Part IX Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#divider_6_IX" + }, + { + "body": "Metal raceways, Type MC cable, Type MI cable, or Type AC cable attached to elevator cars shall be bonded to metal parts of the car that are bonded to the equipment grounding conductor.", + "displayTitle": "620.81 Metal Raceways Attached to Cars", + "children": [], + "url": "https://2023.antflix.net#620.81" + }, + { + "body": "For electric elevators, the frames of all motors, elevator machines, controllers, and the metal enclosures for all electrical equipment in or on the car or in the hoistway shall be bonded in accordance with Article 250, Parts V and VII.", + "displayTitle": "620.82 Electric Elevators", + "children": [], + "url": "https://2023.antflix.net#620.82" + }, + { + "body": "For elevators other than electric having any electrical conductors attached to the car, the metal frame of the car, where normally accessible to persons, shall be bonded in accordance with Article 250, Parts V and VII.", + "displayTitle": "620.83 Nonelectric Elevators", + "children": [], + "url": "https://2023.antflix.net#620.83" + }, + { + "body": "Escalators, moving walks, platform lifts, and stairway chairlifts shall comply with Article 250.", + "displayTitle": "620.84 Escalators, Moving Walks, Platform Lifts, and Stairway Chairlifts", + "children": [], + "url": "https://2023.antflix.net#620.84" + }, + { + "displayTitle": "Part X Emergency and Standby Power Systems", + "children": [], + "url": "https://2023.antflix.net#divider_6_X" + }, + { + "body": "Elevators shall be permitted to be powered by an emergency or standby power system. Informational Note No. 1: See ASME A17.1-2016/CSA B44-16, Safety Code for Elevators and Escalators, 2.27.2, for additional information. Informational Note No. 2: When an elevator is classified as a fire service access elevator or occupant evacuation operation elevator, some building codes require the elevator equipment, elevator hoistway lighting, ventilation and cooling equipment for elevator machine rooms, control rooms, machine spaces, and control spaces as well as elevator car lighting to be supplied by standby power systems in compliance with Article 701.", + "displayTitle": "620.91 Emergency and Standby Power Systems", + "children": [ + { + "body": "For elevator systems that regenerate power back into the power source that is unable to absorb the regenerative power under overhauling elevator load conditions, a means shall be provided to absorb this power.", + "displayTitle": "(A) Regenerative Power", + "children": [], + "url": "https://2023.antflix.net#620.91_(A)" + }, + { + "body": "Other building loads, such as power and lighting, shall be permitted as the energy absorption means required in 620.91(A), provided that such loads are automatically connected to the emergency or standby power system operating the elevators and are large enough to absorb the elevator regenerative power.", + "displayTitle": "(B) Other Building Loads", + "children": [], + "url": "https://2023.antflix.net#620.91_(B)" + }, + { + "body": "The disconnecting means required by 620.51 shall disconnect the elevator from both the emergency or standby power system and the normal power system. Where an additional power source is connected to the load side of the disconnecting means, which allows automatic movement of the car to permit evacuation of passengers, the disconnecting means required in 620.51 shall be provided with an auxiliary contact that is positively opened mechanically, and the opening shall not be solely dependent on springs. This contact shall cause the additional power source to be disconnected from its load when the disconnecting means is in the open position.", + "displayTitle": "(C) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#620.91_(C)" + } + ], + "url": "https://2023.antflix.net#620.91" + } + ], + "url": "https://2023.antflix.net#620" + }, + { + "displayTitle": "Article 625 Electric Vehicle Power Transfer System", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_93_I" + }, + { + "body": "This article covers the electrical conductors and equipment connecting an electric vehicle to premises wiring for the purposes of charging, power export, or bidirectional current flow. Informational Note No. 1: See NFPA 505-2018. Fire Safety Standard for Powered Industrial Trucks Including Type Designations, Areas of Use, Conversions, Maintenance, and Operations, for information on fire protection of industrial trucks. Informational Note No. 2: See UL 2594-2016, Electric Vehicle Supply Equipment, for information on conductive electric vehicle supply equipment. Informational Note No. 3: See UL 2202-2009, Electric Vehicle Charging System Equipment, for information on conductive electric vehicle charging equipment. Informational Note No. 4: See UL 2750-2020, Outline of Investigation for Wireless Power Transfer Equipment for Electric Vehicles, for information on wireless power transfer equipment for transferring power to an electric vehicle. Informational Note No. 5: See NECA 413-2019, Installing and Maintaining Electric Vehicle Supply Equipment (EVSE), for information on the procedures for installing and maintaining AC Level 1. AC Level 2, and fast-charging dc electric vehicle supply equipment (EVSE).", + "displayTitle": "625.1 Scope", + "children": [], + "url": "https://2023.antflix.net#625.1" + }, + { + "body": "Unless other voltages are specified, the nominal ac system voltages of 120, 120/240, 208Y/120, 240, 480Y/277, 480, 600Y/347, 600, or 1000 volts or dc system input voltages of up to 1000 volts shall be used to supply equipment covered by this article. Output voltages to the electric vehicle are not specified.", + "displayTitle": "625.4 Voltages", + "children": [], + "url": "https://2023.antflix.net#625.4" + }, + { + "body": "Electric vehicle power transfer system equipment for the purposes of charging, power export, or bidirectional current flow shall be listed.", + "displayTitle": "625.6 Listed", + "children": [], + "url": "https://2023.antflix.net#625.6" + }, + { + "displayTitle": "Part II Equipment Construction", + "children": [], + "url": "https://2023.antflix.net#divider_93_II" + }, + { + "displayTitle": "625.17 Cords and Cables", + "children": [ + { + "body": "The cable for cord-connected electric vehicle supply equipment (EVSE) shall comply with all of the following: Be any of the types specified in 625.17(B)(1) or hard service cord, junior hard service cord, or portable power cable types in accordance with Table 400.4. Hard service cord, junior hard service cord, or portable power cable types shall be listed, as applicable, for exposure to oil and damp and wet locations.Have an ampacity as specified in Table 400.5(A)(1) or, for 8 AWG and larger, in the 60\u00b0C (140\u00b0F) columns of Table 400.5(A)(2).Have an overall length as specified in either of the following:When the interrupting device of the personnel protection system specified in 625.22 is located within the enclosure of the supply equipment or charging system, the power-supply cord shall be not more than the length indicated in (i) or (ii):For portable equipment in accordance with 625.44(A), the power-supply cord shall be not more than 300 mm (12 in.) long.For fastened-in-place equipment in accordance with 625.44(B), the power-supply cord shall be not more than 1.8 m (6 ft) long and the equipment shall be installed at a height that prevents the power-supply cord from contacting the floor when it is connected to the proper receptacle.When the interrupting device of the personnel protection system specified in 625.22 is located at the attachment plug, or within the first 300 mm (12 in.) of the power-supply cord, the overall cord length shall be not greater than 4.6 m (15 ft).", + "displayTitle": "(A) Power-Supply Cord", + "children": [], + "url": "https://2023.antflix.net#625.17_(A)" + }, + { + "body": "The output cable to electric vehicles shall be one of the following: Listed Type EV, EVJ, EVE, EVT, or EVJT flexible cable as specified in Table 400.4An integral part of listed electric vehicle supply equipmentInformational Note No. 1: See UL 2594-2016, Standard for Electric Vehicle Supply Equipment, for information on conductive electric vehicle supply equipment.Informational Note No. 2: See UL 2202-2009, Standard for Electric Vehicle (EV) Charging System Equipment, for information on conductive electric vehicle charging equipment.", + "displayTitle": "(B) Output Cable to Electric Vehicles", + "children": [], + "url": "https://2023.antflix.net#625.17_(B)" + }, + { + "body": "The overall usable length shall not exceed 7.5 m (25 ft) unless equipped with a cable management system that is part of the listed electric vehicle supply equipment.", + "displayTitle": "(C) Overall Cord and Cable Length", + "children": [ + { + "body": "For portable EVSE, the cord-exposed usable length shall be measured from the face of the attachment plug to the face of the electric vehicle connector.", + "displayTitle": "(1) Portable Equipment", + "children": [], + "url": "https://2023.antflix.net#625.17_(C)_(1)" + }, + { + "body": "Where the EVSE is fastened-in-place, the usable length of the output cable to the electric vehicle shall be measured from the cable exit of the electric vehicle supply equipment to the face of the electric vehicle connector. Where the wireless power transfer equipment (WPTE) is fastened-in-place, the output cable to the primary pad shall be measured from the cable exit of the control box to the cable inlet at the primary pad.", + "displayTitle": "(2) Fastened-in-Place", + "children": [], + "url": "https://2023.antflix.net#625.17_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#625.17_(C)" + }, + { + "body": "Other cabling systems that are integral parts of listed EVSE and are intended to interconnect pieces of equipment within an EVSE system using approved installation methods shall be permitted.", + "displayTitle": "(D) Interconnecting Cabling Systems", + "children": [], + "url": "https://2023.antflix.net#625.17_(D)" + } + ], + "url": "https://2023.antflix.net#625.17" + }, + { + "body": "EVSE shall have a listed system of protection against electric shock of personnel. Where cord-and-plug-connected equipment is used, the interrupting device of a listed personnel protection system shall be provided according to 625.17(A). A personnel protection system shall not be required for EVSE that supplies less than 60 volts dc.", + "displayTitle": "625.22 Personnel Protection System", + "children": [], + "url": "https://2023.antflix.net#625.22" + }, + { + "displayTitle": "Part III Installation", + "children": [], + "url": "https://2023.antflix.net#divider_82_III" + }, + { + "body": "Each outlet installed for the purpose of supplying EVSE greater than 16 amperes or 120 volts shall be supplied by an individual branch circuit. Exception: Branch circuits shall be permitted to feed multiple EVSEs as permitted by 625.42(A) or (B).", + "displayTitle": "625.40 Electric Vehicle Branch Circuit", + "children": [], + "url": "https://2023.antflix.net#625.40" + }, + { + "body": "Overcurrent protection for feeders and branch circuits supplying EVSE and WPTE, including bidirectional EVSE and WPTE, shall be sized for continuous duty and shall have a current rating of not less than 125 percent of the maximum load of the equipment. Where noncontinuous loads are supplied from the same feeder, the overcurrent device shall have a current rating of not less than the sum of the noncontinuous loads plus 125 percent of the continuous loads.", + "displayTitle": "625.41 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#625.41" + }, + { + "body": "The EVSE shall have sufficient rating to supply the load served. Electric vehicle charging loads shall be considered to be continuous loads for the purposes of this article. Service and feeder shall be sized in accordance with the product ratings, unless the overall rating of the installation can be limited through controls as permitted by 625.42(A) or (B).", + "displayTitle": "625.42 Rating", + "children": [ + { + "body": "Where an EMS in accordance with 750.30 provides load management of EVSE, the maximum equipment load on a service and feeder shall be the maximum load permitted by the EMS. The EMS shall be permitted to be integral to one piece of equipment or integral to a listed system consisting of more than one piece of equipment. When one or more pieces of equipment are provided with an integral load management control, the system shall be marked to indicate this control is provided.", + "displayTitle": "(A) Energy Management System (EMS)", + "children": [], + "url": "https://2023.antflix.net#625.42_(A)" + }, + { + "body": "EVSE with restricted access to an ampere adjusting means complying with 750.30(C) shall be permitted. If adjustments have an impact on the rating label, those changes shall be in accordance with manufacturer's instructions, and the adjusted rating shall appear on the rating label with sufficient durability to withstand the environment involved. EVSEas referenced shall be permitted to have ampere ratings that are equal to the adjusted current setting.", + "displayTitle": "(B) EVSE With Adjustable Settings", + "children": [], + "url": "https://2023.antflix.net#625.42_(B)" + } + ], + "url": "https://2023.antflix.net#625.42" + }, + { + "body": "For EVSE and WPTE rated more than 60 amperes or more than 150 volts to ground, the disconnecting means shall be provided and installed in a readily accessible location. If the disconnecting means is installed remote from the equipment, a plaque shall be installed on the equipment denoting the location of the disconnecting means. The disconnecting means shall be lockable open in accordance with 110.25.", + "displayTitle": "625.43 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#625.43" + }, + { + "body": "EVSE and WPTE shall be connected to the premises wiring system in accordance with one of the methods in 625.44(A) through (C).", + "displayTitle": "625.44 Equipment Connection", + "children": [ + { + "body": "Portable equipment shall be connected to the premises wiring system by one or more of the following methods: A nonlocking, 2-pole, 3-wire grounding-type receptacle outlet rated at 125 volts, single phase, 15 or 20 amperesA nonlocking, 2-pole, 3-wire grounding-type receptacle outlet rated at 250 volts, single phase, 15 or 20 amperesA nonlocking, 2-pole, 3-wire or 3-pole, 4-wire grounding-type receptacle outlet rated at 250 volts, single phase, 30 or 50 amperes, or 125/250 volts, single-phase, 30, 50, or 60 amperesA nonlocking, 2-pole, 3-wire grounding-type receptacle outlet rated at 60 volts dc maximum, 15 or 20 amperes", + "displayTitle": "(A) Portable Equipment", + "children": [], + "url": "https://2023.antflix.net#625.44_(A)" + }, + { + "body": "Equipment that is fastened-in-place shall be connected to the premises wiring system by one of the following methods: A nonlocking, 2-pole, 3-wire grounding-type receptacle outlet rated 125 volts or 250 volts, single phase, up to 50 amperesA nonlocking, 3-pole, 4-wire grounding-type receptacle outlet rated 250 volts, three phase, up to 50 amperesA nonlocking, 3-pole, 4-wire grounding-type receptacle outlet rated 125/250 volts, single phase, 30, 50, or 60 amperesA nonlocking, 2-pole, 3-wire grounding-type receptacle outlet rated 60 volts dc maximum, 15 or 20 amperes", + "displayTitle": "(B) Fastened-in-Place Equipment", + "children": [], + "url": "https://2023.antflix.net#625.44_(B)" + }, + { + "body": "All other EVSE and WPTE shall be permanently wired and fixed-in-place to the supporting surface.", + "displayTitle": "(C) Fixed-in-Place Equipment", + "children": [], + "url": "https://2023.antflix.net#625.44_(C)" + } + ], + "url": "https://2023.antflix.net#625.44" + }, + { + "body": "Means shall be provided such that, upon loss of voltage from the utility or other electrical system(s), energy cannot be back fed through the electric vehicle and the supply equipment to the premises wiring system unless permitted by 625.48.", + "displayTitle": "625.46 Loss of Primary Source", + "children": [], + "url": "https://2023.antflix.net#625.46" + }, + { + "body": "Where equipment is identified for the application, more than one feeder or branch circuit shall be permitted to supply equipment.", + "displayTitle": "625.47 Multiple Feeder or Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#625.47" + }, + { + "body": "EVSE or WPTE that incorporates a power export function and that is part of an interactive system that serves as an optional standby system, an electric power production source, or a bidirectional power feed shall be listed and marked as suitable for that purpose. When used as an optional standby system, the requirements of Parts I and II of Article 702 shall apply; when used as an electric power production source, the requirements of Parts I and II of Article 705 shall apply. EVPE that provides a receptacle outlet as its point of power export shall be in accordance with 625.60. Informational Note No. 1: See UL 1741, Inverters, Converters, Controllers and Interconnection System Equipment for Use with Distributed Energy Resources, for further information on supply equipment. Informational Note No. 2: See UL 9741, Bidirectional Electric Vehicle (EV) Charging System Equipment, for vehicle interactive systems. Informational Note No. 3: See SAE J3072, Standard for Interconnection Requirements for Onboard, Utility-Interactive Inverter Systems, for further information.", + "displayTitle": "625.48 Interactive Equipment", + "children": [], + "url": "https://2023.antflix.net#625.48" + }, + { + "body": "EVPE and bidirectional EVSE that incorporate a power export function shall be permitted to be a part of an interconnected power system operating in island mode.", + "displayTitle": "625.49 Island Mode", + "children": [], + "url": "https://2023.antflix.net#625.49" + }, + { + "body": "The EVSE shall be located for direct electrical coupling of the EV connector (conductive or inductive) to the electric vehicle. Unless specifically listed and marked for the location, the coupling means of the EVSE shall be stored or located at a height of not less than 450 mm (18 in.) above the floor level for indoor locations or 600 mm (24 in.) above the grade level for outdoor locations. This requirement does not apply to portable EVSE constructed in accordance with 625.44(A).", + "displayTitle": "625.50 Location", + "children": [], + "url": "https://2023.antflix.net#625.50" + }, + { + "body": "The ventilation requirement for charging an electric vehicle in an indoor enclosed space shall be determined by 625.52(A) or (B).", + "displayTitle": "625.52 Ventilation", + "children": [ + { + "body": "Where electric vehicle storage batteries are used or where the equipment is listed for charging electric vehicles indoors without ventilation, mechanical ventilation shall not be required.", + "displayTitle": "(A) Ventilation Not Required", + "children": [], + "url": "https://2023.antflix.net#625.52_(A)" + }, + { + "body": "Where the equipment is listed for charging electric vehicles that require ventilation for indoor charging, mechanical ventilation, such as a fan, shall be provided. The ventilation shall include both supply and exhaust equipment and shall be permanently installed and located to intake from, and vent directly to, the outdoors. Positive-pressure ventilation systems shall be permitted only in vehicle charging buildings or areas that have been specifically designed and approved for that application. Mechanical ventilation requirements shall be determined by one of the methods specified in 625.52(B)(1) through (B)(4).", + "displayTitle": "(B) Ventilation Required", + "children": [ + { + "body": "For supply voltages and currents specified in Table 625.52(B)(1)(1) or Table 625.52(B)(1)(2), the minimum ventilation requirements shall be as specified in Table 625.52(B)(1)(1) or Table 625.52(B)(1)(2) for each of the total number of electric vehicles that can be charged at one time.", + "displayTitle": "(1) Table Values", + "children": [], + "url": "https://2023.antflix.net#625.52_(B)_(1)" + }, + { + "body": "For supply voltages and currents other than specified in Table 625.52(B)(1)(1) or Table 625.52(B)(1)(2), the minimum ventilation requirements shall be calculated by means of the following general formulas, as applicable: (1) Single-phase ac or dc: Ventilationsingle-phase ac or dc in cubic meters per minute (m3/min) = [625.52(B)(2)a] Ventilationsingle-phase ac or dc in cubic feet per minute (cfm) = [625.52(B)(2)b] (2) Three-phase ac: Ventilation3-phase in cubic meters per minute (m3/min) = [625.52(B)(2)c] Ventilation3-phase in cubic feet per minute (cfm) = [625.52(B)(2)d] ", + "displayTitle": "(2) Other Values", + "children": [], + "url": "https://2023.antflix.net#625.52_(B)_(2)" + }, + { + "body": "For an equipment ventilation system designed by a person qualified to perform such calculations as an integral part of a building's total ventilation system, the minimum ventilation requirements shall be permitted to be determined in accordance with calculations specified in the engineering study.", + "displayTitle": "(3) Engineered Systems", + "children": [], + "url": "https://2023.antflix.net#625.52_(B)_(3)" + }, + { + "body": "The supply circuit to the mechanical ventilation equipment shall be electrically interlocked with the equipment and shall remain energized during the entire electric vehicle charging cycle. Equipment receptacles rated at 125 volts, single phase, 15 and 20 amperes shall be switched and the mechanical ventilation system shall be electrically interlocked through the switch supply power to the receptacle. Equipment supplied from less than 50 volts dc shall be switched and the mechanical ventilation system shall be electrically interlocked through the switch supply power to the equipment. Table 625.52(B)(1)(1) Minimum Ventilation Required in Cubic Meters per Minute (m3/min) for Each of the Total Number of Electric Vehicles That Can Be Charged at One Time Branch Circuit Ampere Rating Branch-Circuit Voltage DC \u2265 50 V Single Phase 3 Phase 120 V 208 V 240 V or120/240 V 208 V or208Y/120 V 240 V 480 V or480Y/277V 600 V or600Y/347V 15 0.5 1.1 1.8 2.1 \u2014 \u2014 \u2014 \u2014 20 0.6 1.4 2.4 2.8 4.2 4.8 9.7 12 30 0.9 2.1 3.6 4.2 6.3 7.2 15 18 40 1.2 2.8 4.8 5.6 8.4 9.7 19 24 50 1.5 3.5 6.1 7.0 10 12 24 30 60 1.8 4.2 7.3 8.4 13 15 29 36 100 2.9 7.0 12 14 21 24 48 60 150 \u2014 \u2014 \u2014 \u2014 31 36 73 91 200 \u2014 \u2014 \u2014 \u2014 42 48 97 120 250 \u2014 \u2014 \u2014 \u2014 52 60 120 150 300 \u2014 \u2014 \u2014 \u2014 63 73 145 180 350 \u2014 \u2014 \u2014 \u2014 73 85 170 210 400 \u2014 \u2014 \u2014 \u2014 84 97 195 240 Table 625.52(B)(1)(2) Minimum Ventilation Required in Cubic Feet per Minute (cfm) for Each of the Total Number of Electric Vehicles That Can Be Charged at One Time Branch Circuit Ampere Rating Branch-Circuit Voltage DC \u2265 50 V Single Phase 3 Phase 120 V 208 V 240 V or120/240 V 208 V or208Y/120 V 240 V 480 V or480Y/277V 600 V or600Y/347V 15 15.4 37 64 74 \u2014 \u2014 \u2014 \u2014 20 20.4 49 85 99 148 171 342 427 30 30.8 74 128 148 222 256 512 641 40 41.3 99 171 197 296 342 683 854 50 51.3 123 214 246 370 427 854 1066 60 61.7 148 256 296 444 512 1025 1281 100 102.5 246 427 493 740 854 1708 2135 150 \u2014 \u2014 \u2014 \u2014 1110 1281 2562 3203 200 \u2014 \u2014 \u2014 \u2014 1480 1708 3416 4270 250 \u2014 \u2014 \u2014 \u2014 1850 2135 4270 5338 300 \u2014 \u2014 \u2014 \u2014 2221 2562 5125 6406 350 \u2014 \u2014 \u2014 \u2014 2591 2989 5979 7473 400 \u2014 \u2014 \u2014 \u2014 2961 3416 6832 8541 ", + "displayTitle": "(4) Supply Circuits", + "children": [], + "url": "https://2023.antflix.net#625.52_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#625.52_(B)" + } + ], + "url": "https://2023.antflix.net#625.52" + }, + { + "body": "All receptacles installed for the connection of electric vehicle charging shall have ground-fault circuit-interrupter protection for personnel.", + "displayTitle": "625.54 Ground-Fault Circuit-Interrupter Protection for Personnel", + "children": [], + "url": "https://2023.antflix.net#625.54" + }, + { + "body": "All receptacles installed in a wet location for electric vehicle charging shall have an enclosure that is weatherproof with the attachment plug cap inserted or removed. An outlet box hood installed for this purpose shall be listed and shall be identified as extra duty. Other listed products, enclosures, or assemblies providing weatherproof protection that do not utilize an outlet box hood shall not be required to be marked extra duty.", + "displayTitle": "625.56 Receptacle Enclosures", + "children": [], + "url": "https://2023.antflix.net#625.56" + }, + { + "body": "AC receptacles installed in electric vehicles and intended to allow for connection of off-board utilization equipment shall comply with 625.60(A) through (D).", + "displayTitle": "625.60 AC Receptacle Outlets Used for EVPE", + "children": [ + { + "body": "The receptacle outlet shall be listed.", + "displayTitle": "(A) Type", + "children": [], + "url": "https://2023.antflix.net#625.60_(A)" + }, + { + "body": "The receptacle outlet shall be rated 250 volts maximum, single phase 50 amperes maximum.", + "displayTitle": "(B) Rating", + "children": [], + "url": "https://2023.antflix.net#625.60_(B)" + }, + { + "body": "Electric vehicles provided with receptacle outlets for power export shall be provided with overcurrent protection integral to the power export system. The overcurrent protection shall have a nominal rating sufficient for the receptacle it protects. The overcurrent protection shall also be sufficiently rated for the maximum available fault current at the receptacle and shall be included in the interactive equipment evaluation. See 625.48.", + "displayTitle": "(C) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#625.60_(C)" + }, + { + "body": "Ground-fault circuit-interrupter protection for personnel shall be provided for all receptacles. The ground-fault circuit-interrupter indication and reset shall be installed in a readily accessible location. Informational Note: There are various methods available to achieve ground-fault circuit-interrupter protection.", + "displayTitle": "(D) GFCI Protection for Personnel", + "children": [], + "url": "https://2023.antflix.net#625.60_(D)" + } + ], + "url": "https://2023.antflix.net#625.60" + }, + { + "displayTitle": "Part IV Wireless Power Transfer Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_29_IV" + }, + { + "body": "The primary pad base plate shall be of a nonferrous metal and shall be connected to the circuit equipment grounding conductor unless the listed WPTE employs a double-insulation system. The base plate shall be sized to match the size of the primary pad enclosure.", + "displayTitle": "625.101 Grounding", + "children": [], + "url": "https://2023.antflix.net#625.101" + }, + { + "displayTitle": "625.102 Installation", + "children": [ + { + "body": "The control pad, if included in the WPTE configuration, shall comply with 625.102(B). The primary pad shall comply with 625.102(C).", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#625.102_(A)" + }, + { + "body": "The control box enclosure shall be suitable for the environment and shall be mounted at a height not less than 450 mm (18 in.) above the floor level for indoor locations or 600 mm (24 in.) above grade level for outdoor locations. The control box shall be mounted in one of the following forms: PedestalWall or poleBuilding or structureRaised concrete pad", + "displayTitle": "(B) Control Box", + "children": [], + "url": "https://2023.antflix.net#625.102_(B)" + }, + { + "body": "The primary pad shall be installed secured to the surface or embedded in the surface of the floor with its top flush with the surface or below the surface, all per manufacturer's instructions and the following: If the primary pad is located in an area requiring snow removal, it shall not be located on or above the surface.Exception: Where installed on private property where snow removal is done manually, the primary pad shall be permitted to be installed on or above the surface.The primary pad enclosure shall be suitable for the environment. If the primary pad is located in an area subject to severe climatic conditions (e.g., flooding), the enclosure shall be suitably rated for those conditions.", + "displayTitle": "(C) Primary Pad", + "children": [], + "url": "https://2023.antflix.net#625.102_(C)" + }, + { + "body": "The output cable to the primary pad shall be secured in place over its entire length for the purpose of restricting its movement and to prevent strain at the connection points. If installed in conditions where drive-over could occur, the cable shall be provided with supplemental protection. Where there is no control box, the cord or cable supplying power to the primary pad shall be secured in place in order to restrict movement and to prevent strain at the connection points. Where subject to vehicular traffic, supplemental protection shall be provided.", + "displayTitle": "(D) Protection of Cords and Cables to the Primary Pad", + "children": [], + "url": "https://2023.antflix.net#625.102_(D)" + }, + { + "body": "Other wiring systems and fittings specifically listed for use on the WPTE shall be permitted.", + "displayTitle": "(E) Other Wiring Systems", + "children": [], + "url": "https://2023.antflix.net#625.102_(E)" + } + ], + "url": "https://2023.antflix.net#625.102" + } + ], + "url": "https://2023.antflix.net#625" + }, + { + "displayTitle": "Article 626 Electrified Truck Parking Spaces", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_94_I" + }, + { + "body": "This article covers the electrical conductors and equipment external to the truck or transport refrigerated unit that connects nonpropulsion electrical elements of trucks or transport refrigerated units to a supply of electricity, and the installation of equipment and devices related to electrical installations within an electrified truck parking space.", + "displayTitle": "626.1 Scope", + "children": [], + "url": "https://2023.antflix.net#626.1" + }, + { + "body": "Wherever the requirements of other articles of this Code and Article 626 differ, the requirements of Article 626 shall apply. Unless electrified truck parking space wiring systems are supported or arranged in such a manner that they cannot be used in or above locations classified in 511.3 or 514.3, or both, they shall comply with 626.3(A) and (B) in addition to the requirements of this article.", + "displayTitle": "626.3 Other Articles", + "children": [ + { + "body": "Electrified truck parking space electrical wiring systems located at facilities for the repair or storage of self-propelled vehicles that use volatile flammable liquids or flammable gases for fuel or power shall comply with Article 511.", + "displayTitle": "(A) Vehicle Repair and Storage Facilities", + "children": [], + "url": "https://2023.antflix.net#626.3_(A)" + }, + { + "body": "Electrified truck parking space electrical wiring systems located at or serving motor fuel dispensing stations shall comply with Article 514. Informational Note: See NFPA 88A-2019, Standard for Parking Structures, and NFPA 30A-2021, Code for Motor Fuel Dispensing Facilities and Repair Garages, for additional information.", + "displayTitle": "(B) Motor Fuel Dispensing Stations", + "children": [], + "url": "https://2023.antflix.net#626.3_(B)" + } + ], + "url": "https://2023.antflix.net#626.3" + }, + { + "displayTitle": "626.4 General Requirements", + "children": [ + { + "body": "This article shall not apply to that portion of other equipment in residential, commercial, or industrial facilities that requires electric power used to load and unload cargo, operate conveyors, and for other equipment used on the site or truck.", + "displayTitle": "(A) Not Covered", + "children": [], + "url": "https://2023.antflix.net#626.4_(A)" + }, + { + "body": "Unless other voltages are specified, the nominal ac system voltages of 120, 120/240, 208Y/120, 240, or 480Y/277 shall be used to supply equipment covered by this article.", + "displayTitle": "(B) Distribution System Voltages", + "children": [], + "url": "https://2023.antflix.net#626.4_(B)" + }, + { + "body": "This article shall apply to the electrified truck parking space supply equipment intended for connection to a wiring system as defined in 626.4(B).", + "displayTitle": "(C) Connection to Wiring System", + "children": [], + "url": "https://2023.antflix.net#626.4_(C)" + } + ], + "url": "https://2023.antflix.net#626.4" + }, + { + "displayTitle": "Part II Electrified Truck Parking Space Electrical Wiring Systems", + "children": [], + "url": "https://2023.antflix.net#divider_94_II" + }, + { + "body": "Electrified truck parking space single-phase branch circuits shall be derived from a 208Y/120-volt, 3-phase, 4-wire system or a 120/240-volt, single-phase, 3-wire system. Exception: A 120-volt distribution system shall be permitted to supply existing electrified truck parking spaces.", + "displayTitle": "626.10 Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#626.10" + }, + { + "displayTitle": "626.11 Feeder and Service Load Calculations", + "children": [ + { + "body": "The calculated load of a feeder or service shall be not less than the sum of the loads on the branch circuits. Electrical service and feeders shall be calculated on the basis of not less than 11 kVA per electrified truck parking space.", + "displayTitle": "(A) Parking Space Load", + "children": [], + "url": "https://2023.antflix.net#626.11_(A)" + }, + { + "body": "Electrified truck parking space electrical wiring system demand factors shall be based upon the climatic temperature zone in which the equipment is installed. The demand factors set forth in Table 626.11(B) shall be the minimum allowable demand factors that shall be permitted for calculating load for service and feeders. No demand factor shall be allowed for any other load, except as provided in this article. Informational Note: The U.S. Department of Agriculture (USDA) has developed a commonly used \"Plant Hardiness Zone\" map that is publicly available. The map provides guidance for determining the Climatic Temperature Zone. Data indicate that the HVAC has the highest power requirement in cold climates, with the heating demand representing the greatest load, which in turn is dependent on outside temperature. In very warm climates, where no heating load is necessary, the cooling load increases as the outdoor temperature rises. These demand factors do not apply to the portion of electrical wiring systems that supply the transport refrigerated units (TRUs).", + "displayTitle": "(B) Demand Factors", + "children": [], + "url": "https://2023.antflix.net#626.11_(B)" + }, + { + "body": "Where the electrified truck parking space wiring system is in a location that serves two or more electrified truck parking spaces, the equipment for each space shall comply with 626.11 (A), and the calculated load shall be calculated on the basis of each parking space.", + "displayTitle": "(C) Two or More Electrified Truck Parking Spaces", + "children": [], + "url": "https://2023.antflix.net#626.11_(C)" + }, + { + "body": "Truck space branch-circuit supplied loads shall be considered to be continuous. Table 626.11(B) Demand Factors for Services and Feeders Climatic Temperature Zone (USDA Hardiness Zone) (See Note) Demand Factor (%) 1 70 2a 67 2b 62 3a 59 3b 57 4a 55 4b 51 5a 47 5b 43 6a 39 6b 34 7a 29 7b 24 8a 21 8b 20 9a 20 9b 20 10a 21 10b 23 11 24 Note: The climatic temperature zones shown in Table 626.11 (B) correlate with those found on the \"USDA Plant Hardiness Zone Map,\" and the climatic temperature zone selected for use with the table shall be determined through the use of this map based on the installation location.", + "displayTitle": "(D) Conductor Rating", + "children": [], + "url": "https://2023.antflix.net#626.11_(D)" + } + ], + "url": "https://2023.antflix.net#626.11" + }, + { + "displayTitle": "Part III Electrified Truck Parking Space Supply Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_83_III" + }, + { + "displayTitle": "626.22 Wiring Methods and Materials", + "children": [ + { + "body": "The electrified truck parking space supply equipment shall be provided in one of the following forms: PedestalOverhead gantryRaised concrete pad", + "displayTitle": "(A) Electrified Truck Parking Space Supply Equipment Type", + "children": [], + "url": "https://2023.antflix.net#626.22_(A)" + }, + { + "body": "Post, pedestal, and raised concrete pad types of electrified truck parking space supply equipment shall be not less than 600 mm (2 ft) aboveground or above the point identified as the prevailing highest water level mark or an equivalent benchmark based on seasonal or storm-driven flooding from the authority having jurisdiction.", + "displayTitle": "(B) Mounting Height", + "children": [], + "url": "https://2023.antflix.net#626.22_(B)" + }, + { + "body": "All electrified truck parking space supply equipment shall be accessible by an unobstructed entrance or passageway not less than 600 mm (2 ft) wide and not less than 2.0 m (6 ft 6 in.) high.", + "displayTitle": "(C) Access to Working Space", + "children": [], + "url": "https://2023.antflix.net#626.22_(C)" + }, + { + "body": "A disconnecting switch or circuit breaker shall be provided to disconnect one or more electrified truck parking space supply equipment sites from a remote location. The disconnecting means shall be provided and installed in a readily accessible location and shall be lockable open in accordance with 110.25.", + "displayTitle": "(D) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#626.22_(D)" + } + ], + "url": "https://2023.antflix.net#626.22" + }, + { + "displayTitle": "626.23 Overhead Gantry or Cable Management System", + "children": [ + { + "body": "Electrified truck parking space equipment provided from either overhead gantry or cable management systems shall utilize a permanently attached power supply cable in electrified truck parking space supply equipment. Other cable types and assemblies listed as being suitable for the purpose, including optional hybrid communications, signal, and composite optical fiber cables, shall be permitted.", + "displayTitle": "(A) Cable Management", + "children": [], + "url": "https://2023.antflix.net#626.23_(A)" + }, + { + "body": "Means to prevent strain from being transmitted to the wiring terminals shall be provided. Permanently attached power supply cable(s) shall be provided with a means to de-energize the cable conductors and power service delivery device upon exposure to strain that could result in either cable damage or separation from the power service delivery device and exposure of live parts.", + "displayTitle": "(B) Strain Relief", + "children": [], + "url": "https://2023.antflix.net#626.23_(B)" + } + ], + "url": "https://2023.antflix.net#626.23" + }, + { + "displayTitle": "626.24 Electrified Truck Parking Space Supply Equipment Connection Means", + "children": [ + { + "body": "Each truck shall be supplied from electrified truck parking space supply equipment through suitable extra-hard service cables or cords. Each connection to the equipment shall be by a single separable power supply cable assembly.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#626.24_(A)" + }, + { + "body": "All receptacles shall be listed and of the grounding type. Every truck parking space with electrical supply shall be equipped with the following: A maximum of three receptacles, each 2-pole, 3-wire grounding type and rated 20 amperes, 125 volts, and two of the three connected to two separate branch circuits.Informational Note No. 1: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figure 5-20, for the nonlocking-type and grounding-type 20-ampere receptacle configuration.One single receptacle, 3-pole, 4-wire grounding type, single phase rated either 30 amperes 208Y/120 volts or 125/250 volts. The 125/250-volt receptacle shall be permitted to be used on a 208Y/120-volt, single-phase circuit.Informational Note No. 2: See UL1686-2012, Pin and Sleeve Configurations, Figure C2.9 or Part C3, for various configurations of 30-ampere pin and sleeve receptacles.Exception: Where electrified, truck parking space supply equipment provides the heating, air-conditioning, and comfort-cooling function without requiring a direct electrical connection at the truck, only two receptacles identified in 626.24(B)(1) shall be required.", + "displayTitle": "(B) Receptacle", + "children": [], + "url": "https://2023.antflix.net#626.24_(B)" + }, + { + "body": "The electrified truck parking space supply equipment shall be provided with a switch or circuit breaker for disconnecting the power supply to the electrified truck parking space. A disconnecting means shall be provided and installed in a readily accessible location and shall be lockable open in accordance with 110.25.", + "displayTitle": "(C) Disconnecting Means, Parking Space", + "children": [], + "url": "https://2023.antflix.net#626.24_(C)" + }, + { + "body": "In addition to the requirements in 210.8, the electrified truck parking space equipment shall be designed and constructed such that all receptacle outlets in 626.24 are provided with ground-fault circuit-interrupter protection for personnel.", + "displayTitle": "(D) Ground-Fault Circuit-Interrupter Protection for Personnel", + "children": [], + "url": "https://2023.antflix.net#626.24_(D)" + } + ], + "url": "https://2023.antflix.net#626.24" + }, + { + "body": "A separable power-supply cable assembly, consisting of a power-supply cord, a cord connector, and an attachment plug intended for connection with a truck flanged surface inlet, shall be of a listed type. The power-supply cable assembly or assemblies shall be identified and be one of the types and ratings specified in 626.25(A) and (B). Cords with adapters and pigtail ends, extension cords, and similar items shall not be used.", + "displayTitle": "626.25 Separable Power-Supply Cable Assembly", + "children": [ + { + "displayTitle": "(A) Rating(s)", + "children": [ + { + "body": "Equipment with a 20-ampere, 125-volt receptacle, in accordance with 626.24(B)(1), shall use a listed 20-ampere power-supply cable assembly. Exception: It shall be permitted to use a listed separable power-supply cable assembly, either hard service or extra-hard service and rated 15 amperes, 125 volts, for connection to an engine block heater for legacy vehicles.", + "displayTitle": "(1) Twenty-Ampere Power-Supply Cable Assembly", + "children": [], + "url": "https://2023.antflix.net#626.25_(A)_(1)" + }, + { + "body": "Equipment with a 30-ampere, 208Y/120-volt or 125/250-volt receptacle, in accordance with 626.24(B)(2), shall use a listed 30-ampere main power-supply cable assembly.", + "displayTitle": "(2) Thirty-Ampere Power-Supply Cable Assembly", + "children": [], + "url": "https://2023.antflix.net#626.25_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#626.25_(A)" + }, + { + "displayTitle": "(B) Power-Supply Cord", + "children": [ + { + "body": "The cord shall be a listed type with three or four conductors, for single-phase connection, one conductor of which shall be identified in accordance with 400.23. Exception: It shall be permitted to use a separate listed three-conductor separable power-supply cable assembly, one conductor of which shall be identified in accordance with 400.23 and rated 15 amperes, 125 volts for connection to an engine block heater for existing vehicles.", + "displayTitle": "(1) Conductors", + "children": [], + "url": "https://2023.antflix.net#626.25_(B)_(1)" + }, + { + "body": "Extra-hard usage flexible cords and cables rated not less than 90\u00b0C (194\u00b0F), 600 volts; listed for both wet locations and sunlight resistance; and having an outer jacket rated to be resistant to temperature extremes, oil. gasoline, ozone, abrasion, acids, and chemicals shall be permitted where flexibility is necessary between the electrified truck parking space supply equipment, the panel board, and flanged surface inlet(s) on the truck. Exception: Cords for the separable power supply cable assembly for 15- and 20-ampere connections shall be permitted to be a hard service type.", + "displayTitle": "(2) Cord", + "children": [], + "url": "https://2023.antflix.net#626.25_(B)_(2)" + }, + { + "body": "The exposed cord length shall be measured from the face of the attachment plug to the point of entrance to the truck or the face of the flanged surface inlet or to the point where the cord enters the truck. The overall length of the cable shall not exceed 7.5 m (25 ft) unless equipped with a cable management system that is listed as suitable for the purpose.", + "displayTitle": "(3) Cord Overall Length", + "children": [], + "url": "https://2023.antflix.net#626.25_(B)_(3)" + }, + { + "body": "The attachment plug(s) shall be listed, by itself or as part of a cord set, for the purpose and shall be molded to or installed on the flexible cord so that it is secured tightly to the cord at the point where the cord enters the attachment plug. If a right-angle cap is used, the configuration shall be oriented so that the grounding member is farthest from the cord. Where a flexible cord is provided, the attachment plug shall comply with 250.138(A). Connection to 20-Ampere Receptacle. A separable power supply cable assembly for connection to a truck flanged surface inlet, rated at 20 amperes, shall have a non-locking-type attachment plug that shall be 2-pole, 3-wire grounding type rated 20 amperes, 125 volts and intended for use with the 20-ampere, 125-volt receptacle.Exception: A separable power-supply cable assembly, provided for the connection of only an engine block heater, shall have an attachment plug of the 2-pole, 3-wire grounding type, rated 15 amperes, 125 volts.Informational Note: See ANSI/NEMA WD 6-2016, Wiring Devices - Dimensional Specifications, Figure 5-15 or Figure 5-20, for nonlocking- and grounding-type 15- or 20-ampere plug and receptacle configurations.Connection to 30-Ampere Receptacle. A separable power supply cable assembly for connection to a truck flanged surface inlet, rated at 30 amperes, shall have an attachment plug that shall be 3-pole, 4-wire grounding type rated 30 amperes, 208Y/120 volts or 125/250 volts, and intended for use with the receptacle in accordance with 626.24(B)(2). The 125/250-volt attachment plug shall be permitted to be used on a 208Y/120-volt, single-phase circuit.Informational Note: See UL 1686-2012, Pin and Sleeve Configurations, Figure C2.10 or Part C3, for various configurations of 30-ampere pin and sleeve plugs.", + "displayTitle": "(4) Attachment Plug", + "children": [], + "url": "https://2023.antflix.net#626.25_(B)_(4)" + }, + { + "body": "The cord connector for a separable power-supply cable assembly, as specified in 626.25(A)(1), shall be a 2-pole, 3-wire grounding type rated 20 amperes, 125 volts. The cord connector for a separable power-supply cable assembly, as specified in 626.25(A)(2), shall be a 3-pole, 4-wire grounding type rated 30 amperes, 208Y/120 volts or 125/250 volts. The 125/250-volt cord connector shall be permitted to be used on a 208Y/120-volt, single-phase circuit. Exception: The cord connector for a separable power supply cable assembly, rated 15 amperes, provided for the connection of an engine block heater for existing vehicles, shall have an attachment plug that shall be 2-pole, 3-wire grounding type rated 15 amperes, 125 volts. Informational Note: See UL 1686-2012, Pin and Sleeve Configurations, Figure C2.9 or Part C3, for various configurations of 30-ampere cord connectors.", + "displayTitle": "(5) Cord Connector", + "children": [], + "url": "https://2023.antflix.net#626.25_(B)_(5)" + } + ], + "url": "https://2023.antflix.net#626.25_(B)" + } + ], + "url": "https://2023.antflix.net#626.25" + }, + { + "body": "Means shall be provided such that, upon loss of voltage from the utility or other electric supply system(s), energy cannot be back-fed through the truck and the truck supply equipment to the electrified truck parking space wiring system unless permitted in 626.27.", + "displayTitle": "626.26 Loss of Primary Power", + "children": [], + "url": "https://2023.antflix.net#626.26" + }, + { + "body": "Electrified truck parking space supply equipment and other parts of a system, either on-board or off-board the vehicle, that are identified for and intended to be interconnected to a vehicle and also serve as an optional standby system or an electric power production source or provide for bi-directional power feed shall be listed as suitable for that purpose. When used as an optional standby system, the requirements of Article 702 shall apply, and when used as an electric power production source, the requirements of Article 705 shall apply.", + "displayTitle": "626.27 Interactive Systems", + "children": [], + "url": "https://2023.antflix.net#626.27" + }, + { + "displayTitle": "Part IV Transport Refrigerated Units (TRUs)", + "children": [], + "url": "https://2023.antflix.net#divider_30_IV" + }, + { + "body": "Electrified truck parking spaces intended to supply transport refrigerated units (TRUs) shall include an individual branch circuit and receptacle for operation of the refrigeration/heating units. The receptacle associated with the TRUs shall be provided in addition to the receptacles required in 626.24(B).", + "displayTitle": "626.30 Transport Refrigerated Units", + "children": [ + { + "body": "TRU spaces shall be supplied from 208-volt, 3-phase, 240-volt, 3-phase, or 480-volt, 3-phase branch circuits and with an equipment grounding conductor.", + "displayTitle": "(A) Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#626.30_(A)" + }, + { + "body": "The electrified truck parking space supply equipment, or portion thereof, providing electric power for the operation of TRUs shall be independent of the loads in Part III of Article 626.", + "displayTitle": "(B) Electrified Truck Parking Space Supply Equipment", + "children": [], + "url": "https://2023.antflix.net#626.30_(B)" + } + ], + "url": "https://2023.antflix.net#626.30" + }, + { + "displayTitle": "626.31 Disconnecting Means and Receptacles", + "children": [ + { + "body": "Disconnecting means shall be provided to isolate each refrigerated unit from its supply connection. A disconnecting means shall be provided and installed in a readily accessible location and shall be lockable open in accordance with 110.25.", + "displayTitle": "(A) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#626.31_(A)" + }, + { + "body": "The disconnecting means shall be readily accessible, located not more than 750 mm (30 in.) from the receptacle it controls, and located in the supply circuit ahead of the receptacle. Circuit breakers or switches located in power outlets complying with this section shall be permitted as the disconnecting means.", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#626.31_(B)" + }, + { + "body": "All receptacles shall be listed and of the grounding type. Every electrified truck parking space intended to provide an electrical supply for TRUs shall be equipped with one or more of the following: A 30-ampere, 480-volt, 3-phase, 3-pole, 4-wire receptacleA 60-ampere, 208-volt, 3-phase, 3-pole, 4-wire receptacleA 20-ampere, 1000-volt, 3-phase, 3-pole, 4-wire receptacle, pin and sleeve typeA 60-ampere, 250-volt, 3-phase, 3-pole, 4-wire receptacleA 60-ampere, 480-volt, 3-phase, 3-pole, 4-wire receptacleInformational Note: See UL 1686-2012, Pin and Sleeve Configurations, Figure C2.11, for complete details of the 30-ampere pin and sleeve receptacle configuration for refrigerated containers (TRUs) and for various configurations of 60-ampere pin and sleeve receptacles.", + "displayTitle": "(C) Receptacles", + "children": [], + "url": "https://2023.antflix.net#626.31_(C)" + } + ], + "url": "https://2023.antflix.net#626.31" + }, + { + "body": "A separable power supply cable assembly, consisting of a cord with an attachment plug and cord connector, shall be one of the types and ratings specified in 626.32(A), (B), and (C). Cords with adapters and pigtail ends, extension cords, and similar items shall not be used.", + "displayTitle": "626.32 Separable Power Supply Cable Assembly", + "children": [ + { + "body": "The power supply cable assembly shall be listed and rated in accordance with one of the following: A 30-ampere, 480-volt, 3-phase assemblyA 60-ampere, 208-volt, 3-phase assemblyA 20-ampere, 1000-volt, 3-phase assemblyA 60-ampere, 480-volt, 3-phase assemblyA 60-ampere, 250-volt, 3-phase assembly", + "displayTitle": "(A) Rating(s)", + "children": [], + "url": "https://2023.antflix.net#626.32_(A)" + }, + { + "body": "The cord shall be a listed type with four conductors, for 3-phase connection, one of which shall be identified in accordance with 400.23 for use as the equipment grounding conductor. Extra-hard usage cables rated not less than 90\u00b0C (194\u00b0F), 600 volts, listed for both wet locations and sunlight resistance, and having an outer jacket rated to be resistant to temperature extremes, oil, gasoline, ozone, abrasion, acids, and chemicals, shall be permitted where flexibility is necessary between the electrified truck parking space supply equipment and the inlet(s) on the TRU.", + "displayTitle": "(B) Cord Assemblies", + "children": [], + "url": "https://2023.antflix.net#626.32_(B)" + }, + { + "body": "Where a flexible cord is provided with an attachment plug and cord connector, they shall comply with 250.138(A). The attachment plug(s) and cord connector(s) shall be listed, by itself or as part of the power-supply cable assembly, for the purpose and shall be molded to or installed on the flexible cord so that it is secured tightly to the cord at the point where the cord enters the attachment plug or cord connector. If a right-angle cap is used, the configuration shall be oriented so that the grounding member is farthest from the cord. An attachment plug and cord connector for the connection of a truck or trailer shall be rated in accordance with one of the following: 30-ampere, 480-volt, 3-phase, 3-pole, 4-wire and intended for use with 30-ampere, 480-volt, 3-phase, 3-pole, 4-wire receptacles and inlets, respectively60-ampere, 208-volt, 3-phase, 3-pole, 4-wire and intended for use with 60-ampere, 208-volt, 3-phase, 3-pole, 4-wire receptacles and inlets, respectively20-ampere, 1000-volt, 3-phase, 3-pole, 4-wire and intended for use with 20-ampere, 1000-volt, 3-phase, 3-pole, 4-wire receptacles and inlets, respectively60-ampere, 480-volt, 3-phase, 3-pole, 4-wire and intended for use with 60-ampere, 480-volt, 3-phase, 3-pole, 4-wire receptacles and inlets, respectively60-ampere, 250-volt, 3-phase, 3-pole, 4-wire and intended for use with 60-ampere, 250-volt, 3-phase, 3-pole, 4-wire receptacles and inlets, respectivelyInformational Note: See UL 1686-2012, Pin and Sleeve Configurations, Figures C2.12 and C2.11, for complete details of the 30-ampere pin and sleeve receptacle configuration for refrigerated containers (TRUs) and for various configurations of 60-ampere pin and sleeve receptacles.", + "displayTitle": "(C) Attachment Plug(s) and Cord Connector(s)", + "children": [], + "url": "https://2023.antflix.net#626.32_(C)" + } + ], + "url": "https://2023.antflix.net#626.32" + } + ], + "url": "https://2023.antflix.net#626" + }, + { + "displayTitle": "Article 630 Electric Welders", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_95_I" + }, + { + "body": "This article covers apparatus for electric arc welding, resistance welding, plasma cutting, and other similar welding and cutting process equipment that is connected to an electrical supply system.", + "displayTitle": "630.1 Scope", + "children": [], + "url": "https://2023.antflix.net#630.1" + }, + { + "body": "All welding and cutting power equipment under the scope of this article shall be listed.", + "displayTitle": "630.6 Listing", + "children": [], + "url": "https://2023.antflix.net#630.6" + }, + { + "body": "All 125-volt, 15- and 20-ampere receptacles for electrical hand tools or portable lighting equipment, supplied by single-phase branch circuits rated 150 volts or less to ground, installed in work areas where welders are operated shall have ground-fault circuit-interrupter protection for personnel.", + "displayTitle": "630.8 Ground-Fault Circuit-Interrupter Protection for Personnel", + "children": [], + "url": "https://2023.antflix.net#630.8" + }, + { + "displayTitle": "Part II Arc Welders", + "children": [], + "url": "https://2023.antflix.net#divider_95_II" + }, + { + "body": "The ampacity of conductors for arc welders shall be in accordance with 630.11(A) and (B).", + "displayTitle": "630.11 Ampacity of Supply Conductors", + "children": [ + { + "body": "The ampacity of the supply conductors shall be not less than the I1eff value on the rating plate. Alternatively, if the I1eff is not given, the ampacity of the supply conductors shall not be less than the current value determined by multiplying the rated primary current in amperes given on the welder rating plate by the factor shown in Table 630.11 (A) based on the duty cycle of the welder.", + "displayTitle": "(A) Individual Welders", + "children": [], + "url": "https://2023.antflix.net#630.11_(A)" + }, + { + "body": "Minimum conductor ampacity shall be based on the individual currents determined in 630.11(A) as the sum of 100 percent of the two largest welders, plus 85 percent of the third largest welder, plus 70 percent of the fourth largest welder, plus 60 percent of all remaining welders. Exception: Percentage values lower than those given in 630.11(B) shall be permitted in cases where the work is such that a high-operating duty cycle for individual welders is impossible. Informational Note: Duty cycle considers welder loading based on the use to be made of each welder and the number of welders supplied by the conductors that will be in use at the same time. The load value used for each welder considers both the magnitude and the duration of the load while the welder is in use. Table 630.11 (A) Duty Cycle Multiplication Factors for Arc Welders Duty Cycle Multiplier for Arc Welders Nonmotor Generator Motor Generator 100 1.00 1.00 90 0.95 0.96 80 0.89 0.91 70 0.84 0.86 60 0.78 0.81 50 0.71 0.75 40 0.63 0.69 30 0.55 0.62 20 or less 0.45 0.55 ", + "displayTitle": "(B) Group of Welders", + "children": [], + "url": "https://2023.antflix.net#630.11_(B)" + } + ], + "url": "https://2023.antflix.net#630.11" + }, + { + "body": "Overcurrent protection for arc welders shall be as provided in 630.12(A) and (B). Where the values as determined by this section do not correspond to the standard ampere ratings provided in 240.6 or where the rating or setting specified results in unnecessary opening of the overcurrent device, the next higher standard rating or setting shall be permitted.", + "displayTitle": "630.12 Overcurrent Protection", + "children": [ + { + "body": "Each welder shall have overcurrent protection rated or set at not more than 200 percent of I1max. Alternatively, if the I1max is not given, the overcurrent protection shall be rated or set at not more than 200 percent of the rated primary current of the welder. An overcurrent device shall not be required for a welder that has supply conductors protected by an overcurrent device rated or set at not more than 200 percent of I1max or at the rated primary current of the welder. If the supply conductors for a welder are protected by an overcurrent device rated or set at not more than 200 percent of I1max or at the rated primary current of the welder, a separate overcurrent device shall not be required.", + "displayTitle": "(A) For Welders", + "children": [], + "url": "https://2023.antflix.net#630.12_(A)" + }, + { + "body": "Conductors that supply one or more welders shall be protected by an overcurrent device rated or set at not more than 200 percent of the conductor ampacity. Informational Note: I1max is the maximum value of the rated supply current at maximum rated output. I1eff is the maximum value of the effective supply current, calculated from the rated supply current (I1), the corresponding duty cycle (duty factor) (X), and the supply current at no-load (Io) by the following equation: [630.12(B)] ", + "displayTitle": "(B) For Conductors", + "children": [], + "url": "https://2023.antflix.net#630.12_(B)" + } + ], + "url": "https://2023.antflix.net#630.12" + }, + { + "body": "A disconnecting means shall be provided in the supply circuit for each arc welder that is not equipped with a disconnect mounted as an integral part of the welder. The disconnecting means shall be a switch, circuit breaker, or listed cord-and-plug connector, and its rating shall be not less than that necessary to accommodate overcurrent protection as specified in 630.12.", + "displayTitle": "630.13 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#630.13" + }, + { + "body": "A rating plate shall be provided for arc welders giving the following information: Name of manufacturerFrequencyNumber of phasesPrimary voltageI1max and I1eff, or rated primary currentMaximum open-circuit voltageRated secondary currentBasis of rating, such as the duty cycle", + "displayTitle": "630.14 Marking", + "children": [], + "url": "https://2023.antflix.net#630.14" + }, + { + "body": "The secondary circuit conductors of an arc welder, consisting of the electrode conductor and the work conductor, shall not be considered as premises wiring for the purpose of applying Article 250. Informational Note: Connecting welder secondary circuits to grounded objects can create parallel paths and can cause objectionable current over equipment grounding conductors.", + "displayTitle": "630.15 Grounding of Welder Secondary Circuit", + "children": [], + "url": "https://2023.antflix.net#630.15" + }, + { + "displayTitle": "Part III Resistance Welders", + "children": [], + "url": "https://2023.antflix.net#divider_84_III" + }, + { + "body": "The ampacity of the supply conductors for resistance welders shall be in accordance with 630.31(A) and (B). Informational Note: The ampacity of the supply conductors for resistance welders necessary to limit the voltage drop to a value permissible for the satisfactory performance of the welder is usually greater than that required to prevent overheating.", + "displayTitle": "630.31 Ampacity of Supply Conductors", + "children": [ + { + "body": "The ampacity of conductors for individual welders shall comply with the following: The ampacity of the supply conductors for a welder that can be operated at different times at different values of primary current or duty cycle shall not be less than 70 percent of the rated primary current for seam and automatically fed welders, and 50 percent of the rated primary current for manually operated nonautomatic welders.The ampacity of the supply conductors for a welder wired for a specific operation for which the actual primary current and duty cycle are known and remain unchanged shall not be less than the product of the actual primary current and the multiplier specified in Table 630.31(A) for the duty cycle at which the welder will be operated.", + "displayTitle": "(A) Individual Welders", + "children": [], + "url": "https://2023.antflix.net#630.31_(A)" + }, + { + "body": "The ampacity of conductors that supply two or more welders shall not be less than the sum of the value obtained in accordance with 630.31 (A) for the largest welder supplied and 60 percent of the values obtained for all the other welders supplied. Informational Note: Explanation of TermsThe rated primary current is the rated kilovolt-amperes (kVA) multiplied by 1000 and divided by the rated primary voltage, using values given on the nameplate.The actual primary current is the current drawn from the supply circuit during each welder operation at the particular heat tap and control setting usedThe duty cycle is the percentage of the time during which the welder is loaded. For instance, a spot welder supplied by a 60-Hz system (216,000 cycles per hour) and making 400 15-cycle welds per hour would have a duty cycle of 2.8 percent (400 multiplied by 15, divided by 216,000, multiplied by 100). A seam welder operating 2 cycles \"on\" and 2 cycles \"off\" would have a duty cycle of 50 percent.Table 630.31(A) Duty Cycle Multiplication Factors for Resistance Welders Duty Cycle (%) Multiplier 50 0.71 40 0.63 30 0.55 25 0.50 20 0.45 15 0.39 10 0.32 7.5 0.27 5 or less 0.22 ", + "displayTitle": "(B) Groups of Welders", + "children": [], + "url": "https://2023.antflix.net#630.31_(B)" + } + ], + "url": "https://2023.antflix.net#630.31" + }, + { + "body": "Overcurrent protection for resistance welders shall be as provided in 630.32(A) and (B). Where the values as determined by this section do not correspond with the standard ampere ratings provided in 240.6 or where the rating or setting specified results in unnecessary opening of the overcurrent device, a higher rating or setting that does not exceed the next higher standard ampere rating shall be permitted.", + "displayTitle": "630.32 Overcurrent Protection", + "children": [ + { + "body": "Each welder shall have an overcurrent device rated or set at not more than 300 percent of the rated primary current of the welder. If the supply conductors for a welder are protected by an overcurrent device rated or set at not more than 200 percent of the rated primary current of the welder, a separate overcurrent device shall not be required.", + "displayTitle": "(A) For Welders", + "children": [], + "url": "https://2023.antflix.net#630.32_(A)" + }, + { + "body": "Conductors that supply one or more welders shall be protected by an overcurrent device rated or set at not more than 300 percent of the conductor ampacity.", + "displayTitle": "(B) For Conductors", + "children": [], + "url": "https://2023.antflix.net#630.32_(B)" + } + ], + "url": "https://2023.antflix.net#630.32" + }, + { + "body": "A switch or circuit breaker shall be provided by which each resistance welder and its control equipment can be disconnected from the supply circuit. The ampere rating of this disconnecting means shall not be less than the supply conductor ampacity determined in accordance with 630.31. The supply circuit switch shall be permitted as the welder disconnecting means where the circuit supplies only one welder.", + "displayTitle": "630.33 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#630.33" + }, + { + "body": "A nameplate shall be provided for each resistance welder, giving the following information: Name of manufacturerFrequencyPrimary voltageRated kilovolt-amperes (kVA) at 50 percent duty cycleMaximum and minimum open-circuit secondary voltageShort-circuit secondary current at maximum secondary voltageSpecified throat and gap setting", + "displayTitle": "630.34 Marking", + "children": [], + "url": "https://2023.antflix.net#630.34" + }, + { + "displayTitle": "Part IV Welding Cable", + "children": [], + "url": "https://2023.antflix.net#divider_31_IV" + }, + { + "body": "Insulation of conductors intended for use in the secondary circuit of electric welders shall be flame retardant.", + "displayTitle": "630.41 Conductors", + "children": [], + "url": "https://2023.antflix.net#630.41" + }, + { + "body": "Cables shall be permitted to be installed in a dedicated cable tray as provided in 630.42(A), (B), and (C).", + "displayTitle": "630.42 Installation", + "children": [ + { + "body": "The cable tray shall provide support at not greater than 150-mm (6-in.) intervals.", + "displayTitle": "(A) Cable Support", + "children": [], + "url": "https://2023.antflix.net#630.42_(A)" + }, + { + "body": "The installation shall comply with 300.21.", + "displayTitle": "(B) Spread of Fire and Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#630.42_(B)" + }, + { + "body": "A permanent sign shall be attached to the cable tray at intervals not greater than 6.0 m (20 ft). The sign shall read as follows: CABLE TRAY FOR WELDING CABLES ONLY", + "displayTitle": "(C) Signs", + "children": [], + "url": "https://2023.antflix.net#630.42_(C)" + } + ], + "url": "https://2023.antflix.net#630.42" + } + ], + "url": "https://2023.antflix.net#630" + }, + { + "displayTitle": "Article 640 Audio Signal Processing, Amplification, and Reproduction Equipment", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_96_I" + }, + { + "displayTitle": "640.1 Scope", + "children": [ + { + "body": "This article covers equipment and wiring for audio signal generation, recording, processing, amplification, and reproduction; distribution of sound; public address; speech input systems; temporary audio system installations; and electronic organs or other electronic musical instruments. This also includes audio systems subject to Article 517, Part VI, and Articles 518, 520, 525, and 530. Informational Note: Examples of permanently installed distributed audio system locations include, but are not limited to, restaurant, hotel, business office, commercial and retail sales environments, churches, and schools. Both portable and permanently installed equipment locations include, but are not limited to, residences, auditoriums, theaters, stadiums, and movie and television studios. Temporary installations include, but are not limited to, auditoriums, theaters, stadiums (which use both temporary and permanently installed systems), and outdoor events such as fairs, festivals, circuses, public events, and concerts.", + "displayTitle": "(A) Covered", + "children": [], + "url": "https://2023.antflix.net#640.1_(A)" + }, + { + "body": "This article does not cover the installation and wiring of fire and burglary alarm signaling devices.", + "displayTitle": "(B) Not Covered", + "children": [], + "url": "https://2023.antflix.net#640.1_(B)" + } + ], + "url": "https://2023.antflix.net#640.1" + }, + { + "body": "Circuits and equipment shall comply with 640.3(A) through (N), as applicable.", + "displayTitle": "640.3 Locations and Other Articles", + "children": [ + { + "body": "Section 300.21 shall apply.", + "displayTitle": "(A) Spread of Fire or Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#640.3_(A)" + }, + { + "body": "Section 300.22(B) shall apply to circuits and equipment installed in ducts specifically fabricated for environmental air. Section 300.22(C) shall apply to circuits and equipment installed in other spaces used for environmental air (plenums). Exception No. 1: Class 2 and Class 3 cables installed in accordance with 722.135(B) shall be permitted to be installed in ducts specifically fabricated for environmental air. Exception No. 2: Class 2 and Class 3 cables installed in accordance with 722.135(B) shall be permitted to be installed in other spaces used for environmental air (plenums). Informational Note: See NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems, 4.3.11.2.6.5, which permits loudspeakers, loudspeaker assemblies, and their accessories listed in accordance with UL 2043-2013, Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces, to be installed in other spaces used for environmental air (ceiling cavity plenums).", + "displayTitle": "(B) Ducts, Plenums, and Other Air-Handling Spaces", + "children": [], + "url": "https://2023.antflix.net#640.3_(B)" + }, + { + "body": "Types CMP, CMR, CMG, and CM communications cables shall be permitted to substitute for Class 2 and Class 3 cables in accordance with 722.135(E).", + "displayTitle": "(C) Communications Cables", + "children": [], + "url": "https://2023.antflix.net#640.3_(C)" + }, + { + "body": "Cable trays and cable tray systems shall be installed in accordance with Part II of Article 392. The installation of Class 2, Class 3, and Type PLTC cables in cable trays shall be in accordance with 722.135(B).", + "displayTitle": "(D) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#640.3_(D)" + }, + { + "body": "Equipment used in hazardous (classified) locations shall comply with the applicable requirements of Chapter 5.", + "displayTitle": "(E) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#640.3_(E)" + }, + { + "body": "Equipment used in assembly occupancies shall comply with Article 518.", + "displayTitle": "(F) Assembly Occupancies", + "children": [], + "url": "https://2023.antflix.net#640.3_(F)" + }, + { + "body": "Equipment used in theaters, audience areas of motion picture and television studios, and similar locations shall comply with Article 520.", + "displayTitle": "(G) Theaters, Audience Areas of Motion Picture and Television Studios, and Similar Locations", + "children": [], + "url": "https://2023.antflix.net#640.3_(G)" + }, + { + "body": "Equipment used in carnivals, circuses, fairs, and similar events shall comply with Article 525.", + "displayTitle": "(H) Carnivals, Circuses, Fairs, and Similar Events", + "children": [], + "url": "https://2023.antflix.net#640.3_(H)" + }, + { + "body": "Equipment used in motion picture and television studios shall comply with Article 530.", + "displayTitle": "(I) Motion Picture and Television Studios", + "children": [], + "url": "https://2023.antflix.net#640.3_(I)" + }, + { + "body": "Audio equipment used in or near swimming pools, fountains, and similar locations shall comply with Article 680.", + "displayTitle": "(J) Swimming Pools, Fountains, and Similar Locations", + "children": [], + "url": "https://2023.antflix.net#640.3_(J)" + }, + { + "body": "Where the authority having jurisdiction permits audio systems for paging or music, or both, to be combined with fire alarm systems, the wiring shall comply with Article 760. Informational Note: See NFPA 72, National Fire Alarm and Signaling Code, and NFPA 101, Life Safety Code, for installation requirements for such combination systems.", + "displayTitle": "(K) Combination Systems", + "children": [], + "url": "https://2023.antflix.net#640.3_(K)" + }, + { + "body": "Equipment used in audio systems that contain an audio or video tuner and an antenna input shall comply with Article 810. Wiring other than antenna wiring that connects such equipment to other audio equipment shall comply with this article.", + "displayTitle": "(L) Antennas", + "children": [], + "url": "https://2023.antflix.net#640.3_(L)" + }, + { + "body": "Generators shall be installed in accordance with 445.10 through 445.12, 445.14 through 445.16, and 445.18. Grounding of portable and vehicle-mounted generators shall be in accordance with 250.34.", + "displayTitle": "(M) Generators", + "children": [], + "url": "https://2023.antflix.net#640.3_(M)" + }, + { + "body": "Additions of pipe organ pipes to an electronic organ shall be in accordance with 650.4 through 650.9.", + "displayTitle": "(N) Organ Pipes", + "children": [], + "url": "https://2023.antflix.net#640.3_(N)" + } + ], + "url": "https://2023.antflix.net#640.3" + }, + { + "body": "Amplifiers, loudspeakers, and other equipment shall be so located or protected as to guard against environmental exposure or physical damage, such as might result in fire, shock, or personal hazard.", + "displayTitle": "640.4 Protection of Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#640.4" + }, + { + "body": "Access to equipment shall not be denied by an accumulation of wires and cables that prevents removal of panels, including suspended ceiling panels.", + "displayTitle": "640.5 Access to Electrical Equipment Behind Panels Designed to Allow Access", + "children": [], + "url": "https://2023.antflix.net#640.5" + }, + { + "displayTitle": "640.6 Mechanical Execution of Work", + "children": [ + { + "body": "Cables installed exposed on the surface of ceilings and sidewalls shall be supported in such a manner that the audio distribution cables will not be damaged by normal building use. Such cables shall be secured by straps, staples, cable ties, hangers, or similar fittings designed and installed so as not to damage the cable. The installation shall conform to 300.4 and 300.11 (A).", + "displayTitle": "(A) Installation of Audio Distribution Cables", + "children": [], + "url": "https://2023.antflix.net#640.6_(A)" + }, + { + "body": "The accessible portion of abandoned audio distribution cables shall be removed.", + "displayTitle": "(B) Abandoned Audio Distribution Cables", + "children": [], + "url": "https://2023.antflix.net#640.6_(B)" + }, + { + "displayTitle": "(C) Installed Audio Distribution Cable Identified for Future Use", + "children": [ + { + "body": "Cables identified for future use shall be marked with a tag of sufficient durability to withstand the environment involved.", + "displayTitle": "(1) Cable Identification Means", + "children": [], + "url": "https://2023.antflix.net#640.6_(C)_(1)" + }, + { + "body": "Cable tags shall have the following information: Date cable was identified for future useDate of intended useInformation related to the intended future use of cable", + "displayTitle": "(2) Cable Tag Criteria", + "children": [], + "url": "https://2023.antflix.net#640.6_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#640.6_(C)" + } + ], + "url": "https://2023.antflix.net#640.6" + }, + { + "displayTitle": "640.7 Grounding", + "children": [ + { + "body": "Wireways and auxiliary gutters shall be connected to an equipment grounding conductor(s), to an equipment bonding jumper, or to the grounded conductor where permitted or required by 250.92(B)(1) or 250.142. Where the wireway or auxiliary gutter does not contain power-supply wires, the equipment grounding conductor shall not be required to be larger than 14 AWG copper or its equivalent. Where the wireway or auxiliary gutter contains power-supply wires, the equipment grounding conductor shall not be smaller than specified in 250.122.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#640.7_(A)" + }, + { + "body": "Grounding of separately derived systems with 60 volts to ground shall be in accordance with 647.6.", + "displayTitle": "(B) Separately Derived Systems With 60 Volts to Ground", + "children": [], + "url": "https://2023.antflix.net#640.7_(B)" + }, + { + "body": "Isolated grounding-type receptacles shall be permitted as described in 250.146(D), and for the implementation of other technical power systems in compliance with Article 250. For separately derived systems with 60 volts to ground, the branch-circuit equipment grounding conductor shall be terminated as required in 647.6(B). Informational Note: See 406.3(E) for grounding-type receptacles and required identification.", + "displayTitle": "(C) Isolated Ground Receptacles", + "children": [], + "url": "https://2023.antflix.net#640.7_(C)" + } + ], + "url": "https://2023.antflix.net#640.7" + }, + { + "body": "Insulated conductors of different systems grouped or bundled so as to be in close physical contact with each other in the same raceway or other enclosure, or in portable cords or cables, shall comply with 300.3(C)(1).", + "displayTitle": "640.8 Grouping of Conductors", + "children": [], + "url": "https://2023.antflix.net#640.8" + }, + { + "displayTitle": "640.9 Wiring Methods", + "children": [ + { + "displayTitle": "(A) Wiring to and Between Audio Equipment", + "children": [ + { + "body": "Wiring and equipment from source of power to and between devices connected to the premises wiring systems shall comply with the requirements of Chapters 1 through 4, except as modified by this article.", + "displayTitle": "(1) Power Wiring", + "children": [], + "url": "https://2023.antflix.net#640.9_(A)_(1)" + }, + { + "body": "Separately derived systems shall comply with the applicable articles of this Code, except as modified by this article. Separately derived systems with 60 volts to ground shall be permitted for use in audio system installations as specified in Article 647.", + "displayTitle": "(2) Separately Derived Power Systems", + "children": [], + "url": "https://2023.antflix.net#640.9_(A)_(2)" + }, + { + "body": "All wiring not connected to the premises wiring system or to a wiring system separately derived from the premises wiring system shall comply with Part II of Article 725.", + "displayTitle": "(3) Other Wiring", + "children": [], + "url": "https://2023.antflix.net#640.9_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#640.9_(A)" + }, + { + "body": "Equipment that has a separate input for an auxiliary power supply shall be wired in compliance with Article 725. Battery installation shall be in accordance with Article 480. This section shall not apply to the use of uninterruptible power supply (UPS) equipment, or other sources of supply, that are intended to act as a direct replacement for the primary circuit power source and are connected to the primary circuit input. Informational Note: See NFPA 72-2019, National Fire Alarm and Signaling Code, where equipment is used for a fire alarm system.", + "displayTitle": "(B) Auxiliary Power Supply Wiring", + "children": [], + "url": "https://2023.antflix.net#640.9_(B)" + }, + { + "body": "Amplifiers with output circuits carrying audio program signals shall be permitted to employ Class 1, Class 2, or Class 3 wiring where the amplifier is listed and marked for use with the specific class of wiring method. Such listing shall ensure the energy output is equivalent to the shock and fire risk of the same class as stated in Articles 724 and 725. Overcurrent protection shall be provided and shall be permitted to be inherent in the amplifier. Audio amplifier output circuits wired using Class 1 wiring methods shall be considered equivalent to Class 1 circuits and shall be installed in accordance with 724.46, where applicable. Audio amplifier output circuits wired using Class 2 or Class 3 wiring methods shall be considered equivalent to Class 2 or Class 3 circuits, respectively. They shall use conductors insulated at not less than the requirements of 722.179 and shall be installed in accordance with 722.135 and 725.136 through 725.144. Informational Note No. 1: See UL 1711-2016, Amplifiers for Fire Protective Signaling Systems, which contains requirements for the listing of amplifiers used for fire alarm systems in compliance with NFPA 72-2019, National Fire Alarm and Signaling Code. Informational Note No. 2: See UL 813-1996, Commercial Audio Equipment, UL 1419-2016, Professional Video and Audio Equipment, ANSI/UL 1492-1996, Audio-Video Products and Accessories; UL 6500-1999, Audio/Video and Musical Instrument Apparatus for Household, Commercial, and Similar Use, and UL 62368-1-2014, Audio/Video, Information and Communication Technology Equipment - Part 1: Safety Requirements, for examples of requirements for listing amplifiers used in residential, commercial, and professional use.", + "displayTitle": "(C) Output Wiring and Listing of Amplifiers", + "children": [], + "url": "https://2023.antflix.net#640.9_(C)" + }, + { + "body": "Audio transformers and autotransformers shall be used only for audio signals in a manner so as not to exceed the manufacturer's stated input or output voltage, impedance, or power limitations. The input or output wires of an audio transformer or autotransformer shall be allowed to connect directly to the amplifier or loudspeaker terminals. No electrical terminal or lead shall be required to be grounded or bonded.", + "displayTitle": "(D) Use of Audio Transformers and Autotransformers", + "children": [], + "url": "https://2023.antflix.net#640.9_(D)" + } + ], + "url": "https://2023.antflix.net#640.9" + }, + { + "body": "Audio systems near bodies of water, either natural or artificial, shall be subject to the restrictions specified in 640.10(A) and (B). Exception: This section does not include audio systems intended for use on boats, yachts, or other forms of land or water transportation used near bodies of water, whether or not supplied by branch-circuit power. Informational Note: See 680.27(A) for installation of underwater audio equipment.", + "displayTitle": "640.10 Audio Systems Near Bodies of Water", + "children": [ + { + "body": "Audio system equipment supplied by branch-circuit power shall not be placed horizontally within 1.5 m (5 ft) of the inside wall of a pool, spa, hot tub, or fountain, or within 1.5 m (5 ft) of the prevailing or tidal high water mark. In addition to the requirements in 210.8(B), the equipment shall be provided with branch-circuit power protected by a ground-fault circuit interrupter where required by other articles.", + "displayTitle": "(A) Equipment Supplied by Branch-Circuit Power", + "children": [], + "url": "https://2023.antflix.net#640.10_(A)" + }, + { + "body": "Audio system equipment powered by a listed Class 2 power supply or by the output of an amplifier listed as permitting the use of Class 2 wiring shall be restricted in placement only by the manufacturer's recommendations. Informational Note: See 640.10(A) for placement of the power supply or amplifier if supplied by branch-circuit power.", + "displayTitle": "(B) Equipment Not Supplied by Branch-Circuit Power", + "children": [], + "url": "https://2023.antflix.net#640.10_(B)" + } + ], + "url": "https://2023.antflix.net#640.10" + }, + { + "displayTitle": "Part II Permanent Audio System Installations", + "children": [], + "url": "https://2023.antflix.net#divider_96_II" + }, + { + "displayTitle": "640.21 Use of Flexible Cords and Cables", + "children": [ + { + "body": "Power supply cords for audio equipment shall be suitable for the use and shall be permitted to be used where the interchange, maintenance, or repair of such equipment is facilitated through the use of a power-supply cord.", + "displayTitle": "(A) Between Equipment and Branch-Circuit Power", + "children": [], + "url": "https://2023.antflix.net#640.21_(A)" + }, + { + "body": "Cables used to connect loudspeakers to each other or to an amplifier shall comply with Article 722. Other listed cable types and assemblies, including optional hybrid communications, signal, and hybrid optical fiber cables, shall be permitted.", + "displayTitle": "(B) Between Loudspeakers and Amplifiers or Between Loudspeakers", + "children": [], + "url": "https://2023.antflix.net#640.21_(B)" + }, + { + "body": "Cables used for the distribution of audio signals between equipment shall comply with Article 722. Other listed cable types and assemblies, including optional hybrid communications, signal, and hybrid optical fiber cables, shall be permitted. Other cable types and assemblies specified by the equipment manufacturer as acceptable for the use shall be permitted in accordance with 110.3(B). Informational Note: See 770.3 for the classification of composite optical fiber cables.", + "displayTitle": "(C) Between Equipment", + "children": [], + "url": "https://2023.antflix.net#640.21_(C)" + }, + { + "body": "The following power supplies, other than branch-circuit power supplies, shall be installed and wired between equipment in accordance with this Code for the voltage and power delivered: Storage batteriesTransformersTransformer rectifiersOther ac or dc power suppliesInformational Note: For some equipment, these sources such as in items (1) and (2) serve as the only source of power. These could, in turn, be supplied with intermittent or continuous branch-circuit power.", + "displayTitle": "(D) Between Equipment and Power Supplies Other Than Branch-Circuit Power", + "children": [], + "url": "https://2023.antflix.net#640.21_(D)" + }, + { + "body": "Flexible cords and cables shall be permitted for the electrical connection of permanently installed equipment racks to the premises wiring system to facilitate access to equipment or for the purpose of isolating the technical power system of the rack from the premises ground. Connection shall be made either by using approved plugs and receptacles or by direct connection within an approved enclosure. Flexible cords and cables shall not be subjected to physical manipulation or abuse while the rack is in use.", + "displayTitle": "(E) Between Equipment Racks and Premises Wiring System", + "children": [], + "url": "https://2023.antflix.net#640.21_(E)" + } + ], + "url": "https://2023.antflix.net#640.21" + }, + { + "body": "Metal equipment racks and enclosures shall be bonded and grounded. Bonding shall not be required if the rack is connected to a technical power ground. Wires, cables, structural components, or other equipment shall not be placed in such a manner as to prevent reasonable access to equipment power switches and resettable or replaceable circuit overcurrent protection devices. Supply cords or cables, if used, shall terminate within the equipment rack enclosure in an identified connector assembly. The supply cords or cable (and connector assembly if used) shall have sufficient ampacity to carry the total load connected to the equipment rack and shall be protected by overcurrent devices.", + "displayTitle": "640.22 Wiring of Equipment Racks and Enclosures", + "children": [], + "url": "https://2023.antflix.net#640.22" + }, + { + "displayTitle": "640.23 Conduit or Tubing", + "children": [ + { + "body": "The number of conductors permitted in a single conduit or tubing shall not exceed the percentage fill specified in Table 1, Chapter 9.", + "displayTitle": "(A) Number of Conductors", + "children": [], + "url": "https://2023.antflix.net#640.23_(A)" + }, + { + "body": "The use of nonmetallic conduit or tubing and insulating bushings shall be permitted where a technical power system is employed and shall comply with applicable articles.", + "displayTitle": "(B) Nonmetallic Conduit or Tubing and Insulating Bushings", + "children": [], + "url": "https://2023.antflix.net#640.23_(B)" + } + ], + "url": "https://2023.antflix.net#640.23" + }, + { + "body": "The use of metallic and nonmetallic wireways, gutters, and auxiliary gutters shall be permitted for use with audio signal conductors and shall comply with applicable articles with respect to permitted locations, construction, and fill.", + "displayTitle": "640.24 Wireways, Gutters, and Auxiliary Gutters", + "children": [], + "url": "https://2023.antflix.net#640.24" + }, + { + "body": "Loudspeakers installed in a fire resistance-rated partition, wall, or ceiling shall be listed and labeled, or identified as speaker assemblies for fire resistance, or installed in an enclosure or recess that maintains the fire resistance rating. Informational Note: Fire-rated construction is the fire-resistive classification used in building codes.", + "displayTitle": "640.25 Loudspeaker Installation in Fire Resistance-Rated Partitions, Walls, and Ceilings", + "children": [], + "url": "https://2023.antflix.net#640.25" + }, + { + "displayTitle": "Part III Portable and Temporary Audio System Installations", + "children": [], + "url": "https://2023.antflix.net#divider_85_III" + }, + { + "body": "Multipole branch-circuit cable connectors, male and female, for power supply cords and cables shall be so constructed that tension on the cord or cable is not transmitted to the connections. The female half shall be attached to the load end of the power supply cord or cable. The connector shall be rated in amperes and designed so that differently rated devices cannot be connected together. Alternating-current multipole connectors shall be polarized and comply with 406.7(A) and (B) and 406.10. Alternating-current or direct-current multipole connectors utilized for connection between loudspeakers and amplifiers, or between loudspeakers, shall not be compatible with nonlocking 15- or 20-ampere rated connectors intended for branch-circuit power or with connectors rated 250 volts or greater and of either the locking or nonlocking type. Signal cabling not intended for such loudspeaker and amplifier interconnection shall not be permitted to be compatible with multipole branch-circuit cable connectors of any accepted configuration. Informational Note: See 400.14 for pull at terminals.", + "displayTitle": "640.41 Multipole Branch-Circuit Cable Connectors", + "children": [], + "url": "https://2023.antflix.net#640.41" + }, + { + "displayTitle": "640.42 Use of Flexible Cords and Cables", + "children": [ + { + "body": "Power supply cords for audio equipment shall be listed and shall be permitted to be used where the interchange, maintenance, or repair of such equipment is facilitated through the use of a power-supply cord.", + "displayTitle": "(A) Between Equipment and Branch-Circuit Power", + "children": [], + "url": "https://2023.antflix.net#640.42_(A)" + }, + { + "body": "Installation of flexible cords and cables used to connect loudspeakers to each other or to an amplifier shall comply with Part I of Article 400 and Parts I, II, and III of Article 725, respectively. Cords and cables listed for portable use, either hard or extra-hard usage as defined by Article 400, shall also be permitted. Other listed cable types and assemblies, including optional hybrid communications, signal, and hybrid optical fiber cables, shall be permitted.", + "displayTitle": "(B) Between Loudspeakers and Amplifiers, or Between Loudspeakers", + "children": [], + "url": "https://2023.antflix.net#640.42_(B)" + }, + { + "body": "Installation of flexible cords and cables used for the distribution of audio signals between equipment shall comply with Parts I and II of Article 400 and Parts I, II, and III of Article 725, respectively. Cords and cables listed for portable use, either hard or extra-hard service as defined by Article 400, shall also be permitted. Other listed cable types and assemblies, including optional hybrid communications, signal, and hybrid optical fiber cables, shall be permitted.", + "displayTitle": "(C) Between Equipment and/or Between Equipment Racks", + "children": [], + "url": "https://2023.antflix.net#640.42_(C)" + }, + { + "body": "Wiring between the following power supplies, other than branch-circuit power supplies, shall be installed, connected, or wired in accordance with this Code for the voltage and power required: Storage batteriesTransformersTransformer rectifiersOther ac or dc power supplies", + "displayTitle": "(D) Between Equipment, Equipment Racks, and Power Supplies Other Than Branch-Circuit Power", + "children": [], + "url": "https://2023.antflix.net#640.42_(D)" + }, + { + "body": "The supply to a portable equipment rack shall be by means of listed extra-hard usage cords or cables, as defined in Table 400.4. For outdoor portable or temporary use, the cords or cables shall be further listed as being suitable for wet locations and sunlight resistant. Sections 520.5, 520.10, and 525.3 shall apply as appropriate when the following conditions exist. Where equipment racks include audio and lighting and/or power equipmentWhen using or constructing cable extensions, adapters, and breakout assemblies", + "displayTitle": "(E) Between Equipment Racks and Branch-Circuit Power", + "children": [], + "url": "https://2023.antflix.net#640.42_(E)" + } + ], + "url": "https://2023.antflix.net#640.42" + }, + { + "body": "Equipment racks fabricated of metal shall be bonded and grounded. Nonmetallic racks with covers (if provided) removed shall not allow access to Class I, Class 3, or primary circuit power without the removal of covers over terminals or the use of tools. Wires, cables, structural components, or other equipment shall not be placed in such a manner as to prevent reasonable access to equipment power switches and resettable or replaceable circuit overcurrent protection devices. Wiring that exits the equipment rack for connection to other equipment or to a power supply shall be relieved of strain or otherwise suitably terminated such that a pull on the flexible cord or cable will not increase the risk of damage to the cable or connected equipment such as to cause an unreasonable risk of fire or electric shock.", + "displayTitle": "640.43 Wiring of Equipment Racks", + "children": [], + "url": "https://2023.antflix.net#640.43" + }, + { + "body": "Portable equipment not listed for outdoor use shall be permitted only where appropriate protection of such equipment from adverse weather conditions is provided to prevent risk of fire or electric shock. Where the system is intended to remain operable during adverse weather, arrangements shall be made for maintaining operation and ventilation of heat-dissipating equipment.", + "displayTitle": "640.44 Environmental Protection of Equipment", + "children": [], + "url": "https://2023.antflix.net#640.44" + }, + { + "body": "Where accessible to the public, flexible cords and cables laid or run on the ground or on the floor shall be covered with approved nonconductive mats. Cables and mats shall be arranged so as not to present a tripping hazard. The cover requirements of 300.5 shall not apply to wiring protected by burial.", + "displayTitle": "640.45 Protection of Wiring", + "children": [], + "url": "https://2023.antflix.net#640.45" + }, + { + "body": "Equipment likely to present a risk of fire, electric shock, or physical injury to the public shall be protected by barriers or supervised by qualified personnel so as to prevent public access.", + "displayTitle": "640.46 Equipment Access", + "children": [], + "url": "https://2023.antflix.net#640.46" + } + ], + "url": "https://2023.antflix.net#640" + }, + { + "displayTitle": "Article 645 Information Technology Equipment", + "children": [ + { + "body": "This article covers equipment, power-supply wiring, equipment interconnecting wiring, and grounding of information technology equipment and systems in an information technology equipment room. Informational Note: See NFPA 75, Standard for the Fire Protection of Information Technology Equipment, which covers the requirements for the protection of information technology' equipment and information technology equipment areas.", + "displayTitle": "645.1 Scope", + "children": [], + "url": "https://2023.antflix.net#645.1" + }, + { + "body": "Circuits and equipment shall comply with 645.3(A) through (I), as applicable.", + "displayTitle": "645.3 Other Articles", + "children": [ + { + "body": "Sections 300.21, 770.26, and 800.26 shall apply to penetrations of the fire-resistant room boundary.", + "displayTitle": "(A) Spread of Fire or Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#645.3_(A)" + }, + { + "body": "The following sections and tables shall apply to wiring and cabling in other spaces used for environmental air (plenums) above an information technology equipment room: Wiring methods: 300.22(C)(1)Class 2, Class 3, and PLTC cables: 722.135(B)Fire alarm systems: 760.53(B)(2) and Table 760.154Optical fiber cables: 770.113(C) and Table 770.154(a)Communications circuits: 800.133(C) and Table 800.154(a)CATV and radio distribution systems: 800.113(C) and Table 800.154(a)", + "displayTitle": "(B) Wiring and Cabling in Other Spaces Used for Environmental Air (Plenums)", + "children": [], + "url": "https://2023.antflix.net#645.3_(B)" + }, + { + "body": "The non-current-carrying conductive members of optical fiber cables in an information technology equipment room shall be bonded and grounded in accordance with 770.114.", + "displayTitle": "(C) Bonding and Grounding", + "children": [], + "url": "https://2023.antflix.net#645.3_(C)" + }, + { + "body": "Section 725.60(A)(4) shall apply to the electrical classification of listed information technology equipment signaling circuits.", + "displayTitle": "(D) Electrical Classification of Data Circuits", + "children": [], + "url": "https://2023.antflix.net#645.3_(D)" + }, + { + "body": "Parts I, II, and III of Article 760 shall apply to fire alarm systems cables and equipment installed in an information technology equipment room. Only fire alarm cables listed in accordance with Part IV of Article 760 and listed fire alarm equipment shall be permitted to be installed in an information technology equipment room.", + "displayTitle": "(E) Fire Alarm Cables and Equipment", + "children": [], + "url": "https://2023.antflix.net#645.3_(E)" + }, + { + "body": "Sections 800.110, 800.113, and 800.154 shall apply to cable routing assemblies and communications raceways. Parts I, II, III, IV, and V of Articles 800 and 805 shall apply to communications wires, cables, and equipment installed in an information technology equipment room. Only communications wires and cables listed in accordance with 800.179, cable routing assemblies, and communications raceways listed in accordance with 800.182, and communications equipment listed in accordance with 800.171 shall be permitted to be installed in an information technology equipment room. Article 645 shall apply to the powering of communications equipment in an information technology equipment room. Informational Note: See Article 100, Definitions, for a definition of communications equipment.", + "displayTitle": "(F) Cable Routing Assemblies, Communications Wires, Cables, Raceways, and Equipment", + "children": [], + "url": "https://2023.antflix.net#645.3_(F)" + }, + { + "body": "Parts I, II, III, IV, and V of Articles 800 and 820 shall apply to community antenna television and radio distribution systems cables and equipment installed in an information technology equipment room. Only community antenna television and radio distribution cables listed in accordance with 800.179 and listed CATV equipment shall be permitted to be installed in an information technology equipment room. Article 645 shall apply to the powering of community antenna television and radio distribution systems equipment installed in an information technology equipment room.", + "displayTitle": "(G) Community Antenna Television and Radio Distribution Systems Cables and Equipment", + "children": [], + "url": "https://2023.antflix.net#645.3_(G)" + }, + { + "body": "Only optical fiber cables listed in accordance with 770.179 shall be permitted to be installed in an information technology equipment room.", + "displayTitle": "(H) Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#645.3_(H)" + }, + { + "body": "Cables extending beyond the information technology equipment room shall be subject to the applicable requirements of this Code.", + "displayTitle": "(I) Cables Not in Information Technology Equipment Room", + "children": [], + "url": "https://2023.antflix.net#645.3_(I)" + } + ], + "url": "https://2023.antflix.net#645.3" + }, + { + "body": "The alternative wiring methods to Chapter 3 and Parts I and II of Article 725 for signaling wiring and Parts I and V of Article 770 for optical fiber cabling shall be permitted where all of the following conditions are met: Disconnecting means complying with 645.10 are provided.A heating/ventilating/air-conditioning (HVAC) system is provided in one of the methods identified in the following:A separate HVAC system that is dedicated for information technology equipment use and is separated from other areas of occupancyAn HVAC system that serves other occupancies and meets all of the following:Also serves the information technology equipment roomProvides fire/smoke dampers at the point of penetration of the room boundaryActivates the damper operation upon initiation by smoke detector alarms, by operation of the disconnecting means required by 645.10, or by bothInformational Note No. 1: See NFPA 75-2020, Standard for the Fire Protection of Information Technology Equipment, Chapter 11, Section 11.1, 11.1.1, 11.1.2, and 11.1.3, for further information.All information technology and communications equipment installed in the room is listed.The room is occupied by, and accessible to, only those personnel needed for the maintenance and functional operation of the installed information technology equipment.The room is separated from other occupancies by fire resistant-rated walls, floors, and ceilings with protected openings.Informational Note No. 2: See NFPA 75-2020, Standard for the Fire Protection of Information Technology Equipment, Chapter 6, for further information on room construction requirements.Only electrical equipment and wiring associated with the operation of the information technology room is installed in the room.Informational Note No. 3: HVAC systems, communications systems, and monitoring systems such as telephone, fire alarm systems, security systems, water detection systems, and other related protective equipment are examples of equipment associated with the operation of the information technology room.", + "displayTitle": "645.4 Special Requirements for Information Technology Equipment Room", + "children": [], + "url": "https://2023.antflix.net#645.4" + }, + { + "displayTitle": "645.5 Supply Circuits and Interconnecting Cables", + "children": [ + { + "body": "The branch-circuit conductors supplying one or more units of information technology equipment shall have an ampacity not less than 125 percent of the total connected load.", + "displayTitle": "(A) Branch-Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#645.5_(A)" + }, + { + "body": "Information technology equipment shall be permitted to be connected to branch circuits by power supply cords that comply with the following: Power-supply cords shall not exceed 4.5 m (15 ft).Power-supply cords shall be listed and a type permitted for use on listed information technology equipment or shall be constructed of listed flexible cord and listed attachment plugs and cord connectors of a type permitted for information technology equipment.Plugs and receptacles used to connect the power-supply cords shall be listed and identified for the system voltage and current applied.Informational Note No. 1: See UL 60950-1, Safety of lnformation Technology Equipment -- Safety - Part 1: General Requirements; or UL 62368-1, Audio/Video, Information and Communication Technology Equipment - Part 1: Safety Requirements, for one method of determining if cords are of a permitted type.Informational Note No. 2: See ANSI/NEMA WD-6, Wiring Devices - Dimensional Specifications, which identifies plug and receptacle configurations L25-30P and L25-30R for 240 Vac and L26-30P and L26-30R for 240/415 Vac.", + "displayTitle": "(B) Power-Supply Cords", + "children": [], + "url": "https://2023.antflix.net#645.5_(B)" + }, + { + "body": "Separate information technology equipment units shall be permitted to be interconnected by means of listed cables and cable assemblies. The 4.5 m (15 ft) limitation in 645.5(B)(1) shall not apply to interconnecting cables.", + "displayTitle": "(C) Interconnecting Cables", + "children": [], + "url": "https://2023.antflix.net#645.5_(C)" + }, + { + "body": "Where exposed to physical damage, power-supply cords, branch-circuit supply conductors, and interconnecting cables shall be protected.", + "displayTitle": "(D) Physical Protection", + "children": [], + "url": "https://2023.antflix.net#645.5_(D)" + }, + { + "body": "Where the area under the floor is accessible and openings minimize the entrance of debris beneath the floor, power-supply cords, communications cables, connecting cables, interconnecting cables, cord-and-plug connections, and receptacles associated with the information technology equipment shall be permitted under a raised floor of approved construction. The installation requirement shall comply with 645.5(E)(1) through (E)(3).", + "displayTitle": "(E) Under Raised Floors", + "children": [ + { + "body": "The supply conductors shall be installed in accordance with 300.11.In addition to the wiring methods of 300.22(C), the following wiring methods shall also be permitted:Rigid metal conduitRigid nonmetallic conduitIntermediate metal conduitElectrical metallic tubingElectrical nonmetallic tubingMetal wirewayNonmetallic wirewaySurface metal raceway with metal coverSurface nonmetallic racewayFlexible metal conduitLiquidtight flexible metal conduitLiquidtight flexible nonmetallic conduitType MI cableType MC cableType AC cableAssociated metallic and nonmetallic boxes or enclosuresType TC power and control tray cable", + "displayTitle": "(1) Installation Requirements for Branch-Circuit Supply Conductors Under a Raised Floor", + "children": [], + "url": "https://2023.antflix.net#645.5_(E)_(1)" + }, + { + "body": "The following cords, cables, and conductors shall be permitted to be installed under a raised floor: Power-supply cords of listed information technology equipment in accordance with 645.5(B).Interconnecting cables enclosed in a raceway.Equipment grounding conductors.Where the air space under a raised floor is protected by an automatic fire suppression system, in addition to wiring installed in compliance with 722.135(B), Types CL2R, CL3R, CL2, and CL3 and substitute cables, including CMP, CMR, CM, and CMG, installed in accordance with 722.135(E) shall be permitted under raised floors.Where the air space under a raised floor is not protected by an automatic fire suppression system, in addition to wiring installed in compliance with 722.135(B), substitute cable Type CMP installed in accordance with 722.135(E) shall be permitted under raised floors.Listed Type DP cable having adequate fire-resistant characteristics suitable for use under raised floors of an information technology equipment room.Informational Note: See CSA \"Vertical Flame Test-Cables in Cable Trays\" as described in CSA C22.2 No. 0.3, Test Methods for Electrical Wires and Cables, for one method of defining resistance to the spread of fire where the damage (char length) of the cable does not exceed 1.5 m (4 ft 11 in.) or \"UL Flame Exposure, Vertical Flame Tray Test\" in UL 1685, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables. The smoke measurements in the test method are not applicable.", + "displayTitle": "(2) Installation Requirements for Power-Supply Cords, Data Cables, Interconnecting Cables, and Grounding Conductors Under a Raised Floor", + "children": [], + "url": "https://2023.antflix.net#645.5_(E)_(2)" + }, + { + "body": "The installation of optical fiber cables shall comply with either of the following: Where the air space under a raised floor is protected by an automatic fire suppression system, optical fiber cables installed in accordance with 770.113(C), Types OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted under raised floors.Where the air space under a raised floor is not protected by an automatic fire suppression system, only optical fiber cables installed in accordance with 770.113(C) shall be permitted under raised floors.", + "displayTitle": "(3) Installation Requirements for Optical Fiber Cables Under a Raised Floor", + "children": [], + "url": "https://2023.antflix.net#645.5_(E)_(3)" + } + ], + "url": "https://2023.antflix.net#645.5_(E)" + }, + { + "body": "Power-supply cords; communications cables, connecting cables, interconnecting cables, and associated boxes, connectors, plugs, and receptacles that are listed as part of, or for, information technology equipment shall not be required to be secured in place where installed under raised floors. Informational Note: See 300.11 for securement requirements for raceways and cables not listed as part of, or for, information technology equipment.", + "displayTitle": "(F) Securing in Place", + "children": [], + "url": "https://2023.antflix.net#645.5_(F)" + }, + { + "body": "The accessible portion of abandoned supply circuits and interconnecting cables shall be removed unless contained in a raceway.", + "displayTitle": "(G) Abandoned Supply Circuits and Interconnecting Cables", + "children": [], + "url": "https://2023.antflix.net#645.5_(G)" + }, + { + "displayTitle": "(H) Installed Supply Circuits and Interconnecting Cables Identified for Future Use", + "children": [ + { + "body": "Supply circuits and interconnecting cables identified for future use shall be marked with a tag of sufficient durability to withstand the environment involved.", + "displayTitle": "(1) Cable Identification Means", + "children": [], + "url": "https://2023.antflix.net#645.5_(H)_(1)" + }, + { + "body": "Supply circuit tags and interconnecting cable tags shall have the following information: Date identified for future useDate of intended useInformation relating to the intended future use", + "displayTitle": "(2) Cable Tag Criteria", + "children": [], + "url": "https://2023.antflix.net#645.5_(H)_(2)" + } + ], + "url": "https://2023.antflix.net#645.5_(H)" + } + ], + "url": "https://2023.antflix.net#645.5" + }, + { + "body": "An approved means shall be provided to disconnect power to all electronic equipment in the information technology equipment room or in designated zones within the room. There shall also be a similar approved means to disconnect the power to all dedicated HVAC systems serving the room or designated zones and to cause all required fire/smoke dampers to close. The disconnecting means shall comply with either 645.10(A) or (B). Exception: These requirements shall not apply to installations complying with Article 685.", + "displayTitle": "645.10 Disconnecting Means", + "children": [ + { + "displayTitle": "(A) Remote Disconnect Controls", + "children": [ + { + "body": "Remote disconnect controls shall be located at approved locations readily accessible in case of fire to authorized personnel and emergency responders.", + "displayTitle": "(1) Emergency Access", + "children": [], + "url": "https://2023.antflix.net#645.10_(A)_(1)" + }, + { + "body": "The remote disconnect means for the control of electronic equipment power and HVAC systems shall be grouped and identified. A single means to control both systems shall be permitted.", + "displayTitle": "(2) Disconnect Identification", + "children": [], + "url": "https://2023.antflix.net#645.10_(A)_(2)" + }, + { + "body": "Where multiple zones are created, each zone shall have an approved means to confine fire or products of combustion to within the zone.", + "displayTitle": "(3) Fire/Smoke Zone Isolation", + "children": [], + "url": "https://2023.antflix.net#645.10_(A)_(3)" + }, + { + "body": "Additional means to prevent unintentional operation of remote disconnect controls shall be permitted. Informational Note: See NFPA 75, Standard for the Fire Protection of Information Technology Equipment, for further information.", + "displayTitle": "(4) System Operation Continuity", + "children": [], + "url": "https://2023.antflix.net#645.10_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#645.10_(A)" + }, + { + "body": "Remote disconnecting controls shall not be required for critical operations data systems when all of the following conditions are met: An approved procedure has been established and maintained for removing power and air movement within the room or zone.Qualified personnel are continuously available to advise emergency responders and to instruct them of disconnecting methods.A smoke-sensing fire detection system is in place.Informational Note: See NFPA 72, National Fire Alarm and Signaling Code, for further information.An approved fire suppression system suitable for the application is in place.Cables installed under a raised floor, other than branch-circuit wiring, and power cords are installed in compliance with 645.5(E)(2) or (E)(3), or in compliance with Table 645.10(B).Table 645.10(B) Cables Installed Under Raised Floors Cable Type Applicable Sections Branch circuits under raised floors 645.5(E)(1) Supply cords of listed information technology equipment 645.5(E)(2)(1), 300.22(C) Class 2 and Class 3 remote control and PLTC cables in other spaces used for environmental air (plenums) 722.135(B) Optical fiber cable in other spaces used for environmental air (plenums) 770.113(C) and Table 770.154(a) Communications wires and cables, cable routing assemblies, and communications raceways in other spaces used for environmental air (plenums) 800.113(C) and Tables 800.154(a), (b), and (c) Coaxial CATV and radio distribution cables in other spaces used for environmental air (plenums) 800.113(C) and Table 800.154(a) ", + "displayTitle": "(B) Critical Operations Data Systems", + "children": [], + "url": "https://2023.antflix.net#645.10_(B)" + } + ], + "url": "https://2023.antflix.net#645.10" + }, + { + "body": "UPS systems installed within the information technology equipment room and their supply and output circuits shall comply with 645.10, except for the following installations and constructions: Installations complying with Parts I and II of Article 685Power sources limited to 750 volt-amperes or less derived either from UPS equipment or from battery circuits integral to electronic equipmentThe disconnecting means shall also disconnect the battery from its load.Informational Note: See UL 1778, Uninterruptible Power Systems, and UL 62368-1, Audio/Video, Information and Communication Technology Equipment - Part 1: Safety Requirements, for information on product listings for electronic equipment disconnecting means and backup battery power sources.", + "displayTitle": "645.11 Uninterruptible Power Supply (UPS)", + "children": [], + "url": "https://2023.antflix.net#645.11" + }, + { + "body": "Separately derived power systems shall be installed in accordance with Parts I and II of Article 250. Power systems derived within listed information technology equipment that supply information technology systems through receptacles or cable assemblies supplied as part of this equipment shall not be considered separately derived for the purpose of applying 250.30.", + "displayTitle": "645.14 System Grounding", + "children": [], + "url": "https://2023.antflix.net#645.14" + }, + { + "body": "All exposed noncurrent-carrying metal parts of an information technology system shall be bonded to the equipment grounding conductor in accordance with Parts I, V, VI, VII, and VIII of Article 250 or shall be double insulated. Where signal reference structures are installed, they shall be bonded to the equipment grounding conductor provided for the information technology equipment. Any auxiliary grounding electrode(s) installed for information technology equipment shall be installed in accordance with 250.54. Informational Note: See 250.146(D) and 406.3(E) for information on isolated grounding-type receptacles.", + "displayTitle": "645.15 Equipment Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#645.15" + }, + { + "body": "Each unit of an information technology system supplied by a branch circuit shall be provided with a manufacturer's nameplate, which shall also include the input power requirements for voltage, frequency, and maximum rated load in amperes.", + "displayTitle": "645.16 Marking", + "children": [], + "url": "https://2023.antflix.net#645.16" + }, + { + "body": "Power distribution units that are used for information technology equipment shall be permitted to have multiple panelboards within a single cabinet if the power distribution unit is utilization equipment listed for information technology application.", + "displayTitle": "645.17 Power Distribution Units", + "children": [], + "url": "https://2023.antflix.net#645.17" + }, + { + "body": "A listed surge-protective device (SPD) shall be installed for critical operations data systems in accordance with Part II of Article 242.", + "displayTitle": "645.18 Surge Protection for Critical Operations Data Systems", + "children": [], + "url": "https://2023.antflix.net#645.18" + }, + { + "body": "As an alternative to the feeder and service load calculations required by Parts III and IV of Article 220, feeder and service load calculations for new or existing loads shall be permitted to be used if provided by qualified persons under engineering supervision.", + "displayTitle": "645.25 Engineering Supervision", + "children": [], + "url": "https://2023.antflix.net#645.25" + }, + { + "body": "Critical operations data system(s) overcurrent protective devices shall be selectively coordinated with all supply-side overcurrent protective devices. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system.", + "displayTitle": "645.27 Selective Coordination", + "children": [], + "url": "https://2023.antflix.net#645.27" + } + ], + "url": "https://2023.antflix.net#645" + }, + { + "displayTitle": "Article 646 Modular Data Centers", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_97_I" + }, + { + "body": "This article covers modular data centers. Informational Note No. 1: Modular data centers include the installed information technology equipment (ITE) and support equipment, electrical supply and distribution, wiring and protection, working space, grounding, HVAC, and the like, that are located in an equipment enclosure. Informational Note No. 2: See NFPA 75, Standard for the Fire Protection of Information Technology Equipment, which covers the requirements for the protection of information technology equipment and systems in an information technology equipment room. Informational Note No. 3: See UL 60950-1, Information Technology Equipment - Safety - Part 1: General Requirements, and UL 62368-1, Audio/Video, Information and Communication Technology Equipment - Part 1: Safety Requirements, for information on listing requirements for both information technology equipment and communications equipment contained within a modular data center. Informational Note No. 4: Modular data centers are sometimes referred to as containerized data centers. Informational Note No. 5: Equipment enclosures housing only support equipment (e.g., HVAC or power distribution equipment) that are not part of a specific modular data center are not considered a modular data center.", + "displayTitle": "646.1 Scope", + "children": [], + "url": "https://2023.antflix.net#646.1" + }, + { + "body": "Circuits and equipment shall comply with 646.3(A) through (M) as applicable. Wherever the requirements of other articles of this Code and Article 646 differ, the requirements of Article 646 shall apply.", + "displayTitle": "646.3 Other Articles", + "children": [ + { + "body": "Sections 300.21, 770.26, and 800.26 shall apply to penetrations of a fire resistant room boundary, if provided.", + "displayTitle": "(A) Spread of Fire or Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#646.3_(A)" + }, + { + "body": "The following sections and tables shall apply to wiring and cabling in other spaces used for environmental air (plenums) within a modular data center space: Wiring methods: 300.22(C)(1)Class 2, Class 3, and PLTC cables: 722.135(B)Fire alarm systems: 760.53(B)(2) and Table 760.154Optical fiber cables: 770.113(C) and Table 770.154(a)Communications circuits: 800.113(C) and Table 800.154(a)CATV and radio distribution systems: 800.113(C) and Table 800.154(a)Informational Note: Environmentally controlled working spaces, aisles, and equipment areas in an MDC are not considered a plenum.", + "displayTitle": "(B) Wiring and Cabling in Other Spaces Used for Environmental Air (Plenums)", + "children": [], + "url": "https://2023.antflix.net#646.3_(B)" + }, + { + "body": "The non-current-carrying conductive members of optical fiber cables in an MDC shall be grounded in accordance with 770.114. Grounding and bonding of communications protectors, cable shields, and noncurrent-carrying metallic members of cable shall comply with Part IV of Article 805.", + "displayTitle": "(C) Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#646.3_(C)" + }, + { + "body": "Section 725.60(A)(4) shall apply to the electrical classification of listed information technology equipment signaling circuits.", + "displayTitle": "(D) Electrical Classification of Data Circuits", + "children": [], + "url": "https://2023.antflix.net#646.3_(D)" + }, + { + "body": "Parts I, II, and III of Article 760 shall apply to fire alarm systems, cables, and equipment installed in an MDC, where provided. Only fire alarm cables listed in accordance with Part IV of Article 760 and listed fire alarm equipment shall be permitted to be installed in an MDC.", + "displayTitle": "(E) Fire Alarm Equipment", + "children": [], + "url": "https://2023.antflix.net#646.3_(E)" + }, + { + "body": "Sections 800.110, 800.113, and 800.154 shall apply to cable routing assemblies and communications raceways. Parts I, II, III, IV, and V of Articles 800 and 805 shall apply to communications wires, cables, and equipment installed in an MDC. Only communications wires and cables listed in accordance with 800.179, cable routing assemblies and communications raceways listed in accordance with 800.182, and communications equipment listed in accordance with 800.171 shall be permitted to be installed in an MDC. Informational Note: See Article 100 for a definition of communications equipment.", + "displayTitle": "(F) Cable Routing Assemblies and Communications Wires, Cables, Raceways, and Equipment", + "children": [], + "url": "https://2023.antflix.net#646.3_(F)" + }, + { + "body": "Parts I, II, III, IV, and V of Articles 800 and 820 shall apply to community antenna television and radio distribution systems equipment installed in an MDC. Only community antenna television and radio distribution cables listed in accordance with 800.179 and listed CATV equipment shall be permitted to be installed in an MDC.", + "displayTitle": "(G) Community Antenna Television and Radio Distribution Systems Cables and Equipment", + "children": [], + "url": "https://2023.antflix.net#646.3_(G)" + }, + { + "body": "Where provided, surge-protective devices shall be listed and labeled and installed in accordance with Part II of Article 242.", + "displayTitle": "(H) Surge-Protective Devices (SPDs)", + "children": [], + "url": "https://2023.antflix.net#646.3_(H)" + }, + { + "body": "Lighting shall be installed in accordance with Parts I through XIV of Article 410.", + "displayTitle": "(I) Lighting", + "children": [], + "url": "https://2023.antflix.net#646.3_(I)" + }, + { + "body": "Power distribution wiring and wiring protection within an MDC shall comply with Parts I, II, and III of Article 210 for branch circuits.", + "displayTitle": "(J) Power Distribution Wiring and Wiring Protection", + "children": [], + "url": "https://2023.antflix.net#646.3_(J)" + }, + { + "body": "Wiring methods and materials shall comply with the following: Unless modified elsewhere in this article, wiring methods and materials for power distribution shall comply with Chapter 3. Wiring shall be suitable for its use and installation and shall be listed and labeled.Exception: This requirement shall not apply to wiring that is part of listed and labeled equipment.The following wiring methods shall not be permitted:Integrated gas spacer cable: Type IGS (Article 326)Concealed knob-and-tube wiring (Article 394)Messenger-supported wiring (Article 396)Open wiring on insulators (Article 398)Outdoor overhead conductors over 600 volts (Article 395)Wiring in areas under a raised floor that are constructed and used for ventilation as described in 645.5(E) shall be permitted to use the wiring methods described in 645.5(E) if the conditions of 645.4 are met.Installation of wiring for remote-control, signaling, and power-limited circuits shall comply with Part II of Article 725.Installation of optical fiber cables shall comply with Part V of Article 770.Alternate wiring methods as permitted by Article 645 shall be permitted for MDCs, provided that all of the conditions of 645.4 are met.", + "displayTitle": "(K) Wiring Methods and Materials", + "children": [], + "url": "https://2023.antflix.net#646.3_(K)" + }, + { + "body": "For an MDC that is designed such that it can be powered from a separate electrical service, the service equipment for control and protection of services and their installation shall comply with Parts I, V, VI, and VII of Article 230. The service equipment and their arrangement and installation shall permit the installation of the service-entrance conductors in accordance with Parts I and IV of Article 230. Service equipment shall be listed and labeled and marked as being suitable for use as service equipment.", + "displayTitle": "(L) Service Equipment", + "children": [], + "url": "https://2023.antflix.net#646.3_(L)" + }, + { + "body": "An approved means shall be provided to disconnect power to all electronic equipment in the MDC in accordance with 645.10. There shall also be a similar approved means to disconnect the power to all dedicated HVAC systems serving the MDC that shall cause all required fire/smoke dampers to close.", + "displayTitle": "(M) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#646.3_(M)" + } + ], + "url": "https://2023.antflix.net#646.3" + }, + { + "body": "All MDCs shall be listed and labeled and comply with 646.3(M) and 646.5 through 646.9 or comply with this article. Informational Note: See UL Subject 2755, Outline of Investigation for Modular Data Centers, for information on listing requirements for MDCs.", + "displayTitle": "646.4 Applicable Requirements", + "children": [], + "url": "https://2023.antflix.net#646.4" + }, + { + "body": "A permanent nameplate shall be attached to each equipment enclosure of an MDC and shall be plainly visible after installation. The nameplate shall include the following information, as applicable: Supply voltage, number of phases, frequency, and full-load current. The full-load current shown on the nameplate shall not be less than the sum of the full-load currents required for all motors and other equipment that may be in operation at the same time under normal conditions of use. Where unusual type loads, duty cycles, and so forth, require oversized conductors or permit reduced-size conductors, the required capacity shall be included in the marked full-load current. Where more than one incoming supply circuit is to be provided, the nameplate shall state the preceding information for each circuit. For listed equipment, the full-load current shown on the nameplate shall be permitted to be the maximum, measured, 15-minute, average full-load current.Informational Note No. 1: See 430.22(E) and 430.26 for duty cycle requirements.For MDCs powered by a separate service, the short-circuit current rating of the service equipment provided as part of the MDC.Informational Note No. 2: This rating may be part of the service equipment marking.For MDCs powered by a separate service, if the required service as determined by Parts III and IV of Article 220 is less than the rating of the service panel used, the required service shall be included on the nameplate. As an alternative to the feeder and service load calculations required by Parts III and IV of Article 220, feeder and service load calculations for new, future, or existing loads shall be permitted to be used if performed by qualified persons under engineering supervision.Informational Note No. 3: Branch circuits supplying ITE loads are assumed to be loaded not less than 80 percent of the branch-circuit rating with a 100 percent duty cycle.Electrical diagram number(s) or the number of the index to the electrical drawings.For MDC equipment enclosures that are not powered by a separate service, feeder, or branch circuit, a reference to the powering equipment.Manufacturer's name or trademark.", + "displayTitle": "646.5 Nameplate Data", + "children": [], + "url": "https://2023.antflix.net#646.5" + }, + { + "displayTitle": "646.6 Supply Conductors and Overcurrent Protection", + "children": [ + { + "body": "The size of the supply conductor shall be such as to have an ampacity not less than 125 percent of the full-load current rating. Informational Note No. 1: See the 0-2000-volt ampacity tables of Article 310 for ampacity of conductors rated 600 V and below. Informational Note No. 2: See 430.22(E) and 430.26 for duty cycle requirements.", + "displayTitle": "(A) Size", + "children": [], + "url": "https://2023.antflix.net#646.6_(A)" + }, + { + "body": "Where overcurrent protection for supply conductors is furnished as part of the MDC, overcurrent protection for each supply circuit shall comply with 646.6(B)(1) through (B)(2).", + "displayTitle": "(B) Overcurrent Protection", + "children": [ + { + "body": "Service conductors shall be provided with overcurrent protection in accordance with 230.90 through 230.95.", + "displayTitle": "(1) Service Equipment - Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#646.6_(B)_(1)" + }, + { + "body": "Where overcurrent protection for supply conductors is furnished as part of the MDC as permitted by 240.21, the overcurrent protection shall comply with the following: The overcurrent protection shall consist of a single circuit breaker or set of fuses.The MDC shall be marked \"OVERCURRENT PROTECTION PROVIDED AT MDC SUPPLY TERMINALS.\"The supply conductors shall be considered either as feeders or as taps and be provided with overcurrent protection complying with 240.21.", + "displayTitle": "(2) Taps and Feeders", + "children": [], + "url": "https://2023.antflix.net#646.6_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#646.6_(B)" + } + ], + "url": "https://2023.antflix.net#646.6" + }, + { + "displayTitle": "646.7 Short-Circuit Current Rating", + "children": [ + { + "body": "The service equipment of an MDC that connects directly to a service shall have a short-circuit current rating not less than the available fault current of the service.", + "displayTitle": "(A) Service Equipment", + "children": [], + "url": "https://2023.antflix.net#646.7_(A)" + }, + { + "body": "Modular data centers that connect to a branch circuit or a feeder circuit shall have a short-circuit current rating not less than the available fault current of the branch circuit or feeder. The short-circuit current rating of the MDC shall be based on the short-circuit current rating of a listed and labeled MDC or the short-circuit current rating established using an approved method. Exception: This requirement shall not apply to listed and labeled equipment connected to branch circuits located inside of the MDC equipment enclosure. Informational Note: See UL 508A-2018, Standard for Industrial Control Panels, Supplement SB, for an example of an approved method.", + "displayTitle": "(B) MDCs Connected to Branch Circuits and Feeders", + "children": [], + "url": "https://2023.antflix.net#646.7_(B)" + }, + { + "body": "Modular data center equipment enclosures, powered from a separate MDC system enclosure that is part of the specific MDC system, shall have a short-circuit current rating coordinated with the powering module in accordance with 110.10. Informational Note: See UL 508A-2018, Standard for Industrial Control Panels, Supplement SB, for an example of an approved method for determining short-circuit current ratings.", + "displayTitle": "(C) MDCs Powered From Separate MDC System Enclosures", + "children": [], + "url": "https://2023.antflix.net#646.7_(C)" + } + ], + "url": "https://2023.antflix.net#646.7" + }, + { + "body": "A field-wiring compartment in which service or feeder connections are to be made shall be readily accessible and comply with the following: Permit the connection of the supply wires after the MDC is installedPermit the connection to be introduced and readily connectedBe located so that the connections may be readily inspected after the MDC is installed", + "displayTitle": "646.8 Field-Wiring Compartments", + "children": [], + "url": "https://2023.antflix.net#646.8" + }, + { + "displayTitle": "646.9 Flexible Power Cords and Cables for Connecting Equipment Enclosures of an MDC System", + "children": [ + { + "body": "Flexible power cords and cables shall be permitted to be used for connections between equipment enclosures of an MDC system where not subject to physical damage. Informational Note: One example of flexible power cord usage for connections between equipment enclosures of an MDC system is between an MDC enclosure containing only servers and one containing power distribution equipment.", + "displayTitle": "(A) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#646.9_(A)" + }, + { + "body": "Flexible power cords and cables shall not be used for connection to external sources of power. Informational Note: Examples of external sources of power are electrical services, feeders, and premises branch circuits.", + "displayTitle": "(B) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#646.9_(B)" + }, + { + "body": "Where flexible power cords or cables are used, they shall be listed as suitable for extra-hard usage. Where used outdoors, flexible power cords and cables shall also be listed as suitable for wet locations and shall be sunlight resistant.", + "displayTitle": "(C) Listing", + "children": [], + "url": "https://2023.antflix.net#646.9_(C)" + }, + { + "body": "Single-conductor power cable shall be permitted to be used only in sizes 2 AWG or larger.", + "displayTitle": "(D) Single-Conductor Cable", + "children": [], + "url": "https://2023.antflix.net#646.9_(D)" + } + ], + "url": "https://2023.antflix.net#646.9" + }, + { + "displayTitle": "Part II Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_97_II" + }, + { + "body": "Equipment used for electrical supply and distribution in an MDC, including fittings, devices, luminaires, apparatus, machinery, and the like, shall comply with Parts I and II of Article 110.", + "displayTitle": "646.10 Electrical Supply and Distribution", + "children": [], + "url": "https://2023.antflix.net#646.10" + }, + { + "displayTitle": "646.11 Distribution Transformers", + "children": [ + { + "body": "Utility-owned distribution transformers shall not be permitted in an MDC.", + "displayTitle": "(A) Utility-Owned Transformers", + "children": [], + "url": "https://2023.antflix.net#646.11_(A)" + }, + { + "body": "Non-utility-owned premises distribution transformers installed in the vicinity of an MDC shall be of the dry type or the type filled with a noncombustible dielectric medium. Such transformers shall be installed in accordance with Parts I and II of Article 450. Non-utility-owned premises distribution transformers shall not be permitted in an MDC.", + "displayTitle": "(B) Non-Utility-Owned Premises Transformers", + "children": [], + "url": "https://2023.antflix.net#646.11_(B)" + }, + { + "body": "Power transformers that supply power only to the MDC shall be permitted to be installed in the MDC equipment enclosure. Only dry-type transformers shall be permitted to be installed in the MDC equipment enclosure. Such transformers shall be installed in accordance with Parts I, II, and III of Article 450.", + "displayTitle": "(C) Power Transformers", + "children": [], + "url": "https://2023.antflix.net#646.11_(C)" + } + ], + "url": "https://2023.antflix.net#646.11" + }, + { + "body": "At least one 125-volt ac, 15-or 20-ampere-rated duplex convenience outlet shall be provided in each work area of the MDC to facilitate the powering of test and measurement equipment that may be required during routine maintenance and servicing, without having to route flexible power cords through or across doorways or around line-ups of equipment, or the like.", + "displayTitle": "646.12 Receptacles", + "children": [], + "url": "https://2023.antflix.net#646.12" + }, + { + "body": "Electrical equipment that is an integral part of the MDC, including information technology equipment, lighting, control, power, HVAC (heating, ventilation, and air-conditioning), emergency lighting, alarm circuits, and so forth, shall comply with the requirements for its use and installation and shall be listed and labeled.", + "displayTitle": "646.13 Other Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#646.13" + }, + { + "body": "Listed and labeled equipment shall be installed and used in accordance with any instructions or limitations included in the listing.", + "displayTitle": "646.14 Installation and Use", + "children": [], + "url": "https://2023.antflix.net#646.14" + }, + { + "displayTitle": "Part III Lighting", + "children": [], + "url": "https://2023.antflix.net#divider_86_III" + }, + { + "body": "Illumination shall be provided for all workspaces and areas that are used for exit access and exit discharge. The illumination shall be arranged so that the failure of any single lighting unit does not result in a complete loss of illumination. Informational Note: See NFPA 101-2018, Life Safety Code, Section 7.8, for information on illumination of means of egress.", + "displayTitle": "646.15 General Illumination", + "children": [], + "url": "https://2023.antflix.net#646.15" + }, + { + "body": "Areas that are used for exit access and exit discharge shall be provided with emergency lighting. Emergency lighting systems shall be listed and labeled equipment installed in accordance with the manufacturer's instructions. Informational Note: See NFPA 101-2018, Life Safety Code, Section 7.9, for information on emergency lighting.", + "displayTitle": "646.16 Emergency Lighting", + "children": [], + "url": "https://2023.antflix.net#646.16" + }, + { + "body": "No appliances or lamps, other than those specified as required for emergency use, shall be supplied by emergency lighting circuits. Branch circuits supplying emergency lighting shall be installed to provide service from storage batteries, generator sets, UPS, separate service, fuel cells, or unit equipment. No other equipment shall be connected to these circuits unless the emergency lighting system includes a backup system where only the lighting is supplied by battery circuits under power failure conditions. All boxes and enclosures (including transfer switches, generators, and power panels) for emergency circuits shall be marked to identify them as components of an emergency circuit or system.", + "displayTitle": "646.17 Emergency Lighting Circuits", + "children": [], + "url": "https://2023.antflix.net#646.17" + }, + { + "displayTitle": "Part IV Workspace", + "children": [], + "url": "https://2023.antflix.net#divider_32_IV" + }, + { + "body": "Space about electrical equipment shall comply with 110.26.", + "displayTitle": "646.18 General", + "children": [], + "url": "https://2023.antflix.net#646.18" + }, + { + "body": "For equipment over 1.8 m (6 ft) wide or deep, there shall be one entrance to and egress from the required working space not less than 610 mm (24 in.) wide and 2.0 m (6 1/2 ft) high at each end of the working space. Doors shall open to the full extent of their designed egress opening and be equipped with listed panic hardware or listed fire exit hardware. A single entrance to and egress from the required working space shall be permitted where either of the conditions in 646.19(A) or (B) is met.", + "displayTitle": "646.19 Entrance to and Egress From Working Space", + "children": [ + { + "body": "Where the location permits a continuous and unobstructed way of egress travel, a single entrance to the working space shall be permitted.", + "displayTitle": "(A) Unobstructed Egress", + "children": [], + "url": "https://2023.antflix.net#646.19_(A)" + }, + { + "body": "Where the depth of the working space is twice that required by 110.26(A)(1), a single entrance shall be permitted. It shall be located such that the distance from the equipment to the nearest edge of the entrance is not less than the minimum clear distance specified in Table 110.26(A)(1) for equipment operating at that voltage and in that condition.", + "displayTitle": "(B) Extra Working Space", + "children": [], + "url": "https://2023.antflix.net#646.19_(B)" + } + ], + "url": "https://2023.antflix.net#646.19" + }, + { + "displayTitle": "646.20 Working Space for ITE", + "children": [ + { + "body": "The working space about ITE where any live parts that may be exposed during routine servicing operate at not greater than 30 volts rms, 42 volts peak, or 60 volts dc shall not be required to comply with the workspace requirements of 646.19.", + "displayTitle": "(A) Low-Voltage Circuits", + "children": [], + "url": "https://2023.antflix.net#646.20_(A)" + }, + { + "body": "Any areas of ITE that require servicing of parts that are greater than 30 volts rms, 42 volts peak, or 60 volts dc shall comply with the workspace requirements of 646.19. Informational Note No. 1: For example, field-wiring compartments for ac mains connections, power distribution units, and so forth. Informational Note No. 2: It is assumed that ITE operates at voltages not exceeding 1000 volts.", + "displayTitle": "(B) Other Circuits", + "children": [], + "url": "https://2023.antflix.net#646.20_(B)" + } + ], + "url": "https://2023.antflix.net#646.20" + }, + { + "body": "Working space about a battery system shall comply with 110.26. Working space shall be measured from the edges of the battery racks, cabinets, or trays.", + "displayTitle": "646.21 Work Areas and Working Space About Batteries", + "children": [], + "url": "https://2023.antflix.net#646.21" + }, + { + "body": "Workspace shall be provided to facilitate routine servicing and maintenance (those tasks involving operations that can be accomplished by employees and where extensive disassembly of equipment is not required). Routine servicing and maintenance shall be able to be performed without exposing the worker to a risk of electric shock or personal injury. Informational Note: An example of such routine maintenance is cleaning or replacing an air filter.", + "displayTitle": "646.22 Workspace for Routine Service and Maintenance", + "children": [], + "url": "https://2023.antflix.net#646.22" + } + ], + "url": "https://2023.antflix.net#646" + }, + { + "displayTitle": "Article 647 Sensitive Electronic Equipment", + "children": [ + { + "body": "This article covers the installation and wiring of separately derived systems operating at 120 volts line-to-line and 60 volts to ground for sensitive electronic equipment.", + "displayTitle": "647.1 Scope", + "children": [], + "url": "https://2023.antflix.net#647.1" + }, + { + "body": "Use of a separately derived 120-volt single-phase 3-wire system with 60 volts on each of two ungrounded conductors to an equipment grounding conductor shall be permitted for the purpose of reducing objectionable noise in sensitive electronic equipment locations, provided the following conditions apply: The system is installed only in commercial or industrial occupancies.The system's use is restricted to areas under close supervision by qualified personnel.All of the requirements in 647.4 through 647.8 are met.", + "displayTitle": "647.3 General", + "children": [], + "url": "https://2023.antflix.net#647.3" + }, + { + "displayTitle": "647.4 Wiring Methods", + "children": [ + { + "body": "Use of standard single-phase panelboards and distribution equipment with a higher voltage rating shall be permitted. The system shall be clearly marked on the face of the panel or on the inside of the panel doors. Common trip two-pole circuit breakers or a combination two-pole fused disconnecting means that are identified for use at the system voltage shall be provided for both ungrounded conductors in all feeders and branch circuits. Branch circuits and feeders shall be provided with a means to simultaneously disconnect all ungrounded conductors.", + "displayTitle": "(A) Panelboards and Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#647.4_(A)" + }, + { + "body": "All junction box covers shall be clearly marked to indicate the distribution panel and the system voltage.", + "displayTitle": "(B) Junction Boxes", + "children": [], + "url": "https://2023.antflix.net#647.4_(B)" + }, + { + "body": "All feeders and branch-circuit conductors installed under this section shall be identified as to system at all splices and terminations by color, marking, tagging, or equally effective means. The means of identification shall be posted at each branch-circuit panelboard and at the disconnecting means for the building.", + "displayTitle": "(C) Conductor Identification", + "children": [], + "url": "https://2023.antflix.net#647.4_(C)" + }, + { + "body": "The voltage drop on any branch circuit shall not exceed 1.5 percent. The combined voltage drop of feeder and branch-circuit conductors shall not exceed 2.5 percent.", + "displayTitle": "(D) Voltage Drop", + "children": [ + { + "body": "The voltage drop on branch circuits supplying equipment connected using wiring methods in Chapter 3 shall not exceed 1.5 percent. The combined voltage drop of feeder and branch-circuit conductors shall not exceed 2.5 percent.", + "displayTitle": "(1) Fixed Equipment", + "children": [], + "url": "https://2023.antflix.net#647.4_(D)_(1)" + }, + { + "body": "The voltage drop on branch circuits supplying receptacles shall not exceed 1 percent. For the purposes of making this calculation, the load connected to the receptacle outlet shall be considered to be 50 percent of the branch-circuit rating. The combined voltage drop of feeder and branch-circuit conductors shall not exceed 2.0 percent. Informational Note: The purpose of this provision is to limit voltage drop to 1.5 percent where portable cords may be used as a means of connecting equipment.", + "displayTitle": "(2) Cord-Connected Equipment", + "children": [], + "url": "https://2023.antflix.net#647.4_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#647.4_(D)" + } + ], + "url": "https://2023.antflix.net#647.4" + }, + { + "body": "Where 3-phase power is supplied, a separately derived 6-phase \"wye\" system with 60 volts to ground installed under this article shall be configured as three separately derived 120-volt single-phase systems having a combined total of no more than six disconnects.", + "displayTitle": "647.5 Three-Phase Systems", + "children": [], + "url": "https://2023.antflix.net#647.5" + }, + { + "displayTitle": "647.6 Grounding", + "children": [ + { + "body": "The transformer secondary center tap of the 60/120-volt, 3-wire system shall be grounded as provided in 250.30.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#647.6_(A)" + }, + { + "body": "Permanently wired utilization equipment and receptacles shall be grounded by means of an equipment grounding conductor run with the circuit conductors and connected to an equipment grounding bus prominently marked \"Technical Equipment Ground\" in the branch-circuit panelboard. The equipment grounding bus shall be connected to the grounded conductor on the line side of disconnecting means supplied by the separately derived system. The equipment grounding conductor shall not be smaller than that specified in Table 250.122 and run with the feeder conductors. The technical equipment grounding bus shall not be required to be bonded to the panelboard enclosure. Other equipment grounding methods authorized elsewhere in this Code shall be permitted where the impedance of the equipment grounding return path does not exceed the impedance of equipment grounding conductors sized and installed in accordance with this article. Informational Note No. 1: See 250.122 for equipment grounding conductor sizing requirements where circuit conductors are adjusted in size to compensate for voltage drop. Informational Note No. 2: These requirements limit the impedance of the ground fault return path where only 60 volts apply to a fault condition instead of the usual 120 volts.", + "displayTitle": "(B) Equipment Grounding Conductors Required", + "children": [], + "url": "https://2023.antflix.net#647.6_(B)" + } + ], + "url": "https://2023.antflix.net#647.6" + }, + { + "displayTitle": "647.7 Receptacles", + "children": [ + { + "body": "Where receptacles are used as a means of connecting equipment, the following conditions shall be met:\n\nAll 15- and 20-ampere receptacles shall be GFCI protected.\n\nAll receptacle outlet strips, adapters, receptacle covers, and faceplates shall be marked with the following words or equivalent:\nWARNING - TECHNICAL POWERDo not connect to lighting equipment. For electronic equipment use only. 60/120 V. 1\u03a6ac GFCI protected\nThe warning sign(s) or label(s) shall comply with 110.21(B).\n\nA 125-volt, single-phase, 15- or 20-ampere-rated receptacle having one of its current-carrying poles connected to a grounded circuit conductor shall be located within 1.8 m (6 ft) of all permanently installed 15- or 20-ampere-rated 60/120-volt technical power-system receptacles.\nAll 125-volt receptacles used for 60/120-volt technical power shall have a unique configuration and be identified for use with this class of system.\n\nException: Receptacles and attachment plugs rated 125-volt, single-phase, 15- or 20-amperes, and that are identified for use with grounded, circuit conductors, shall be permitted in machine rooms, control rooms, equipment rooms, equipment racks, and other similar locations that are restricted to use by qualified personnel.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#647.7_(A)" + }, + { + "body": "Isolated ground receptacles shall be permitted as described in 250.146(D); however, the branch-circuit equipment grounding conductor shall be terminated as required in 647.6(B).", + "displayTitle": "(B) Isolated Ground Receptacles", + "children": [], + "url": "https://2023.antflix.net#647.7_(B)" + } + ], + "url": "https://2023.antflix.net#647.7" + }, + { + "body": "Lighting equipment installed under this article for the purpose of reducing electrical noise originating from lighting equipment shall meet the conditions of 647.8(A) through (C).", + "displayTitle": "647.8 Lighting Equipment", + "children": [ + { + "body": "All luminaires connected to separately derived systems operating at 60 volts to ground, and associated control equipment if provided, shall have a disconnecting means that simultaneously opens all ungrounded conductors. The disconnecting means shall be located within sight of the luminaire or be lockable open in accordance with 110.25.", + "displayTitle": "(A) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#647.8_(A)" + }, + { + "body": "All luminaires shall be permanently installed and listed for connection to a separately derived system at 120 volts line-to-line and 60 volts to ground.", + "displayTitle": "(B) Luminaires", + "children": [], + "url": "https://2023.antflix.net#647.8_(B)" + }, + { + "body": "Luminaires installed under this section shall not have an exposed lamp screw shell.", + "displayTitle": "(C) Screw Shell", + "children": [], + "url": "https://2023.antflix.net#647.8_(C)" + } + ], + "url": "https://2023.antflix.net#647.8" + } + ], + "url": "https://2023.antflix.net#647" + }, + { + "displayTitle": "Article 650 Pipe Organs", + "children": [ + { + "body": "This article covers those electrical circuits and parts of electrically operated pipe organs that are employed for the control of the keyboards and of the pipe organ sounding apparatus, typically organ pipes. Informational Note: The typical pipe organ is a very large musical instrument that is built as part of a building or structure.", + "displayTitle": "650.1 Scope", + "children": [], + "url": "https://2023.antflix.net#650.1" + }, + { + "body": "Installations of circuits and equipment shall comply with 650.3(A) and (B) as applicable. Wherever the requirements of other articles in Chapters 1 through 7 of this Code and Article 650 differ, the requirements of Article 650 shall apply.", + "displayTitle": "650.3 Other Articles", + "children": [ + { + "body": "Installations of digital/analog-sampled sound production technology and associated audio signal processing, amplification, reproduction equipment, and wiring installed as part of a pipe organ shall be in accordance with Article 640.", + "displayTitle": "(A) Electronic Organ Equipment", + "children": [], + "url": "https://2023.antflix.net#650.3_(A)" + }, + { + "body": "Installations of optical fiber cables shall be in accordance with Parts I and V of Article 770.", + "displayTitle": "(B) Optical Fiber Cable", + "children": [], + "url": "https://2023.antflix.net#650.3_(B)" + } + ], + "url": "https://2023.antflix.net#650.3" + }, + { + "body": "DC power shall be supplied by a listed dc power supply with a maximum output of 30 volts. Informational Note: Class 1 power-limited power supplies are often utilized in pipe organ applications.", + "displayTitle": "650.4 Source of Energy", + "children": [], + "url": "https://2023.antflix.net#650.4" + }, + { + "body": "The installation of the dc power supply shall comply with either of the following: The dc power supply shall be double insulated.The metallic case of the dc power supply shall be bonded to the input equipment grounding conductor.", + "displayTitle": "650.5 Grounding or Double Insulation of the DC Power Supply", + "children": [], + "url": "https://2023.antflix.net#650.5" + }, + { + "body": "Conductors shall comply with 650.6(A) through (D).", + "displayTitle": "650.6 Conductors", + "children": [ + { + "body": "The minimum conductor size shall be not less than 28 AWG for electronic signal circuits and not less than 26 AWG for electromagnetic valve supply and the like. The minimum conductor size of a main common-return conductor in the electromagnetic supply shall not be less than 14 AWG.", + "displayTitle": "(A) Size", + "children": [], + "url": "https://2023.antflix.net#650.6_(A)" + }, + { + "body": "Conductors shall have thermoplastic or thermosetting insulation.", + "displayTitle": "(B) Insulation", + "children": [], + "url": "https://2023.antflix.net#650.6_(B)" + }, + { + "body": "Except for the common-return conductor and conductors inside the organ proper, the organ sections and the organ console conductors shall be cabled. The common-return conductors shall be permitted under an additional covering enclosing both cable and return conductor, or they shall be permitted as a separate conductor and shall be permitted to be in contact with the cable.", + "displayTitle": "(C) Conductors to Be Cabled", + "children": [], + "url": "https://2023.antflix.net#650.6_(C)" + }, + { + "body": "Each cable shall be provided with an outer covering, either overall or on each of any subassemblies of grouped conductors. Tape shall be permitted in place of a covering. Where not installed in metal raceway, the covering shall be resistant to flame spread, or the cable or each cable subassembly shall be covered with a closely wound listed fireproof tape. Informational Note: See UL 2556-2015, Wire, Cables and Cable Test Methods, for one method of determining that cable is resistant to flame spread by testing the cable to the FV-2/VW-1 Test.", + "displayTitle": "(D) Cable Covering", + "children": [], + "url": "https://2023.antflix.net#650.6_(D)" + } + ], + "url": "https://2023.antflix.net#650.6" + }, + { + "body": "Cables shall be securely fastened in place and shall be permitted to be attached directly to the organ structure without insulating supports. Splices shall not be required to be enclosed in boxes or other enclosures. Control equipment and busbars connecting common-return conductors shall be permitted to be attached directly to the organ structure without insulation supports. Abandoned cables that are not terminated at equipment shall be identified with a tag of sufficient durability to withstand the environment involved.", + "displayTitle": "650.7 Installation of Conductors", + "children": [], + "url": "https://2023.antflix.net#650.7" + }, + { + "body": "Circuits shall be so arranged that 20 AWG through 28 AWG conductors shall be protected by an overcurrent device rated at not more than 6 amperes. Other conductor sizes shall be protected in accordance with their ampacity. A common return conductor shall not require overcurrent protection.", + "displayTitle": "650.8 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#650.8" + }, + { + "body": "The wiring of the pipe organ sounding apparatus shall be within the lockable enclosure (organ chamber) where the exterior pipes shall be permitted to form part of the enclosure. Informational Note: Access to the pipe organ sounding apparatus and the associated circuitry is restricted by an enclosure. In most pipe organ installations, exterior pipes form part of the enclosure. In other installations, the pipes are covered by mill-work that permits the passage of sound.", + "displayTitle": "650.9 Protection From Accidental Contact", + "children": [], + "url": "https://2023.antflix.net#650.9" + } + ], + "url": "https://2023.antflix.net#650" + }, + { + "displayTitle": "Article 660 X-Ray Equipment", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_98_I" + }, + { + "body": "This article covers all X-ray equipment operating at any frequency or voltage for industrial or other nonmedical or nondental use. Informational Note: See Article 517, Part V, for X-ray installations in health care facilities. Nothing in this article shall be construed as specifying safeguards against the useful beam or stray X-ray radiation. Informational Note No. 1: Radiation safety and performance requirements of several classes of X-ray equipment are regulated under Public Law 90-602 and are enforced by the Department of Health and Human Services. Informational Note No. 2: In addition, information on radiation protection by the National Council on Radiation Protection and Measurements is published as Reports of the National Council on Radiation Protection and Measurement. These reports can be obtained from NCRP Publications, 7910 Woodmont Ave., Suite 1016, Bethesda, MD 20814.", + "displayTitle": "660.1 Scope", + "children": [], + "url": "https://2023.antflix.net#660.1" + }, + { + "body": "Unless identified for the location, X-ray and related equipment shall not be installed or operated in hazardous (classified) locations. Informational Note: See Article 517, Part IV, for additional information.", + "displayTitle": "660.3 Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#660.3" + }, + { + "displayTitle": "660.4 Connection to Supply Circuit", + "children": [ + { + "body": "Fixed and stationary X-ray equipment shall be connected to the power supply by means of a wiring method meeting the general requirements of this Code. Equipment properly supplied by a branch circuit rated at not over 30 amperes shall be permitted to be supplied through a suitable attachment plug cap and hard-service cable or power-supply cord.", + "displayTitle": "(A) Fixed and Stationary Equipment", + "children": [], + "url": "https://2023.antflix.net#660.4_(A)" + }, + { + "body": "Individual branch circuits shall not be required for portable, mobile, and transportable X-ray equipment requiring a capacity of not over 60 amperes. Portable and mobile types of X-ray equipment of any capacity shall be supplied through a suitable hard-service cable or power-supply cord. Transportable X-ray equipment of any capacity shall be permitted to be connected to its power supply by suitable connections and hard-service cable or power-supply cord.", + "displayTitle": "(B) Portable, Mobile, and Transportable Equipment", + "children": [], + "url": "https://2023.antflix.net#660.4_(B)" + }, + { + "body": "Circuits and equipment operated at more than 1000 volts, nominal, shall comply with Article 490.", + "displayTitle": "(C) Over 1000 Volts, Nominal", + "children": [], + "url": "https://2023.antflix.net#660.4_(C)" + } + ], + "url": "https://2023.antflix.net#660.4" + }, + { + "body": "A disconnecting means of adequate capacity for at least 50 percent of the input required for the momentary rating, or 100 percent of the input required for the long-time rating, of the X-ray equipment, whichever is greater, shall be provided in the supply circuit. The disconnecting means shall be located within sight from the X-ray control and readily accessible. Exception: The disconnecting means for the X-ray equipment shall not be required under either of the following conditions, provided that the controller disconnecting means is lockable open in accordance with 110.25: (1) Where such a location of the disconnecting means for the X-ray equipment is impracticable or introduces additional or increased hazards to persons or property (2) In industrial installations, with written safety procedures, where conditions of maintenance and supervision ensure that only qualified persons service the equipment", + "displayTitle": "660.5 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#660.5" + }, + { + "displayTitle": "660.6 Rating of Supply Conductors and Overcurrent Protection", + "children": [ + { + "body": "The ampacity of supply branch-circuit conductors and the overcurrent protective devices shall not be less than 50 percent of the momentary rating or 100 percent of the long-time rating, whichever is greater.", + "displayTitle": "(A) Branch-Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#660.6_(A)" + }, + { + "body": "The ampacity of conductors and the rating of overcurrent devices of a feeder for two or more branch circuits supplying X-ray units shall not be less than 100 percent of the momentary demand rating [as determined by 660.6(A)] of the two largest X-ray apparatus plus 20 percent of the momentary ratings of other X-ray apparatus. Informational Note: The minimum conductor size for branch and feeder circuits is also governed by voltage regulation requirements. For a specific installation, the manufacturer usually specifies minimum distribution transformer and conductor sizes, rating of disconnect means, and overcurrent protection.", + "displayTitle": "(B) Feeder Conductors", + "children": [], + "url": "https://2023.antflix.net#660.6_(B)" + } + ], + "url": "https://2023.antflix.net#660.6" + }, + { + "body": "X-ray equipment not provided with a permanently attached power-supply cord shall be provided with suitable wiring terminals or leads for the connection of power supply conductors of the size required by the rating of the branch circuit for the equipment.", + "displayTitle": "660.7 Wiring Terminals", + "children": [], + "url": "https://2023.antflix.net#660.7" + }, + { + "body": "Size 18 AWG or 16 AWG fixture wires, as specified in 724.49, and flexible cords shall be permitted for the control and operating circuits of X-ray and auxiliary equipment where protected by not larger than 20-ampere overcurrent devices.", + "displayTitle": "660.9 Minimum Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#660.9" + }, + { + "body": "All equipment for new X-ray installations and all used or reconditioned X-ray equipment moved to and reinstalled at a new location shall be of an approved type.", + "displayTitle": "660.10 Equipment Installations", + "children": [], + "url": "https://2023.antflix.net#660.10" + }, + { + "displayTitle": "Part II Control", + "children": [], + "url": "https://2023.antflix.net#divider_98_II" + }, + { + "displayTitle": "660.20 Fixed and Stationary Equipment", + "children": [ + { + "body": "A separate control device, in addition to the disconnecting means, shall be incorporated in the X-ray control supply or in the primary circuit to the high-voltage transformer. This device shall be a part of the X-ray equipment but shall be permitted in a separate enclosure immediately adjacent to the X-ray control unit.", + "displayTitle": "(A) Separate Control Device", + "children": [], + "url": "https://2023.antflix.net#660.20_(A)" + }, + { + "body": "A protective device, which shall be permitted to be incorporated into the separate control device, shall be provided to control the load resulting from failures in the high-voltage circuit.", + "displayTitle": "(B) Protective Device", + "children": [], + "url": "https://2023.antflix.net#660.20_(B)" + } + ], + "url": "https://2023.antflix.net#660.20" + }, + { + "body": "Portable and mobile equipment shall comply with 660.20, but the manually controlled device shall be located in or on the equipment.", + "displayTitle": "660.21 Portable and Mobile Equipment", + "children": [], + "url": "https://2023.antflix.net#660.21" + }, + { + "displayTitle": "660.23 Industrial and Commercial Laboratory Equipment", + "children": [ + { + "body": "All radiographic- and fluoroscopic-type equipment shall be effectively enclosed or shall have interlocks that de-energize the equipment automatically to prevent ready access to live current-carrying parts.", + "displayTitle": "(A) Radiographic and Fluoroscopic Types", + "children": [], + "url": "https://2023.antflix.net#660.23_(A)" + }, + { + "body": "Diffraction- and irradiation-type equipment or installations not effectively enclosed or not provided with interlocks to prevent access to uninsulated live parts during operation shall be provided with a positive means to indicate when they are energized. The indicator shall be a pilot light, readable meter deflection, or equivalent means.", + "displayTitle": "(B) Diffraction and Irradiation Types", + "children": [], + "url": "https://2023.antflix.net#660.23_(B)" + } + ], + "url": "https://2023.antflix.net#660.23" + }, + { + "body": "Where more than one piece of equipment is operated from the same high-voltage circuit, each piece or each group of equipment as a unit shall be provided with a high-voltage switch or equivalent disconnecting means. This disconnecting means shall be constructed, enclosed, or located so as to avoid contact by persons with its live parts.", + "displayTitle": "660.24 Independent Control", + "children": [], + "url": "https://2023.antflix.net#660.24" + }, + { + "displayTitle": "Part III Transformers and Capacitors", + "children": [], + "url": "https://2023.antflix.net#divider_87_III" + }, + { + "body": "Transformers and capacitors that are part of an X-ray equipment shall not be required to comply with Articles 450 and 460.", + "displayTitle": "660.35 General", + "children": [], + "url": "https://2023.antflix.net#660.35" + }, + { + "body": "Capacitors shall be mounted within enclosures of insulating material or grounded metal.", + "displayTitle": "660.36 Capacitors", + "children": [], + "url": "https://2023.antflix.net#660.36" + }, + { + "displayTitle": "Part IV Guarding and Grounding", + "children": [], + "url": "https://2023.antflix.net#divider_33_IV" + }, + { + "displayTitle": "660.47 General", + "children": [ + { + "body": "All high-voltage parts, including X-ray tubes, shall be mounted within grounded enclosures. Air, oil, gas, or other suitable insulating media shall be used to insulate the high voltage from the grounded enclosure. The connection from the high-voltage equipment to X-ray tubes and other high-voltage components shall be made with high-voltage shielded cables.", + "displayTitle": "(A) High-Voltage Parts", + "children": [], + "url": "https://2023.antflix.net#660.47_(A)" + }, + { + "body": "Low-voltage cables connecting to oil-filled units that are not completely sealed, such as transformers, condensers, oil coolers, and high-voltage switches, shall have insulation of the oil-resistant type.", + "displayTitle": "(B) Low-Voltage Cables", + "children": [], + "url": "https://2023.antflix.net#660.47_(B)" + } + ], + "url": "https://2023.antflix.net#660.47" + }, + { + "body": "Battery-operated X-ray equipment shall not be required to comply with the grounding requirements of this Code.", + "displayTitle": "660.48 Grounding", + "children": [], + "url": "https://2023.antflix.net#660.48" + } + ], + "url": "https://2023.antflix.net#660" + }, + { + "displayTitle": "Article 665 Induction and Dielectric Heating Equipment", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_99_I" + }, + { + "body": "This article covers the construction and installation of dielectric heating, induction heating, induction melting, and induction welding equipment and accessories for industrial and scientific applications. Medical or dental applications, appliances, or line frequency pipeline and vessel heating are not covered in this article. Informational Note: See Article 427, Part V, for line frequency induction heating of pipelines and vessels.", + "displayTitle": "665.1 Scope", + "children": [], + "url": "https://2023.antflix.net#665.1" + }, + { + "body": "The output circuit shall include all output components external to the converting device, including contactors, switches, busbars, and other conductors. The current flow from the output circuit to ground under operating and ground-fault conditions shall be limited to a value that does not cause 50 volts or more to ground to appear on any accessible part of the heating equipment and its load. The output circuit shall be permitted to be isolated from ground.", + "displayTitle": "665.5 Output Circuit", + "children": [], + "url": "https://2023.antflix.net#665.5" + }, + { + "displayTitle": "665.7 Remote Control", + "children": [ + { + "body": "Where multiple control points are used for applicator energization, a means shall be provided and interlocked so that the applicator can be energized from only one control point at a time. A means for de-energizing the applicator shall be provided at each control point.", + "displayTitle": "(A) Multiple Control Points", + "children": [], + "url": "https://2023.antflix.net#665.7_(A)" + }, + { + "body": "Switches operated by foot pressure shall be provided with a shield over the contact button to avoid accidental closing of a foot switch.", + "displayTitle": "(B) Foot Switches", + "children": [], + "url": "https://2023.antflix.net#665.7_(B)" + } + ], + "url": "https://2023.antflix.net#665.7" + }, + { + "body": "The ampacity of supply conductors shall be determined by 665.10(A) or (B).", + "displayTitle": "665.10 Ampacity of Supply Conductors", + "children": [ + { + "body": "The ampacity of conductors supplying one or more pieces of equipment shall be not less than the sum of the nameplate ratings for the largest group of machines capable of simultaneous operation, plus 100 percent of the standby currents of the remaining machines. Where standby currents are not given on the nameplate, the nameplate rating shall be used as the standby current.", + "displayTitle": "(A) Nameplate Rating", + "children": [], + "url": "https://2023.antflix.net#665.10_(A)" + }, + { + "body": "The ampacity of supply conductors for motor-generator equipment shall be determined in accordance with Article 430, Part II.", + "displayTitle": "(B) Motor-Generator Equipment", + "children": [], + "url": "https://2023.antflix.net#665.10_(B)" + } + ], + "url": "https://2023.antflix.net#665.10" + }, + { + "body": "A readily accessible disconnecting means shall be provided to disconnect each heating equipment from its supply circuit. The disconnecting means shall be located within sight from the controller or be lockable open in accordance with 110.25. The rating of this disconnecting means shall not be less than the nameplate rating of the heating equipment. Motor-generator equipment shall comply with Article 430, Part IX. The supply circuit disconnecting means shall be permitted to serve as the heating equipment disconnecting means where only one heating equipment is supplied.", + "displayTitle": "665.12 Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#665.12" + }, + { + "displayTitle": "Part II Guarding, Grounding, and Labeling", + "children": [], + "url": "https://2023.antflix.net#divider_99_II" + }, + { + "body": "The interconnection components required for a complete heating equipment installation shall be guarded.", + "displayTitle": "665.19 Component Interconnection", + "children": [], + "url": "https://2023.antflix.net#665.19" + }, + { + "body": "The converting device (excluding the component interconnections) shall be completely contained within an enclosure(s) of noncombustible material.", + "displayTitle": "665.20 Enclosures", + "children": [], + "url": "https://2023.antflix.net#665.20" + }, + { + "body": "All control panels shall be of dead-front construction.", + "displayTitle": "665.21 Control Panels", + "children": [], + "url": "https://2023.antflix.net#665.21" + }, + { + "body": "Access doors or detachable access panels shall be employed for internal access to heating equipment. Access doors to internal compartments containing equipment employing voltages from 150 volts to 1000 volts ac or dc shall be capable of being locked closed or shall be interlocked to prevent the supply circuit from being energized while the door(s) is open. The provision for locking or adding a lock to the access doors shall be installed on or at the access door and shall remain in place with or without the lock installed. Access doors to internal compartments containing equipment employing voltages exceeding 1000 volts ac or dc shall be provided with a disconnecting means equipped with mechanical lockouts to prevent access while the heating equipment is energized, or the access doors shall be capable of being locked closed and interlocked to prevent the supply circuit from being energized while the door(s) is open. Detachable panels not normally used for access to such parts shall be fastened in a manner that makes them inconvenient to remove.", + "displayTitle": "665.22 Access to Internal Equipment", + "children": [], + "url": "https://2023.antflix.net#665.22" + }, + { + "body": "Labels or signs that read \"DANGER - HIGH VOLTAGE - KEEP OUT\" shall be attached to the equipment and shall be plainly visible where persons might come in contact with energized parts when doors are open or closed or when panels are removed from compartments containing over 150 volts ac or dc. Hazard signs or labels shall comply with 110.21 (B).", + "displayTitle": "665.23 Hazard Labels or Signs", + "children": [], + "url": "https://2023.antflix.net#665.23" + }, + { + "body": "The time and means of discharge shall be in accordance with 460.6 for capacitors rated 600 volts, nominal, and under. The time and means of discharge shall be in accordance with 460.28 for capacitors rated over 600 volts, nominal. Capacitor internal pressure switches connected to a circuit-interrupter device shall be permitted for capacitor over-current protection.", + "displayTitle": "665.24 Capacitors", + "children": [], + "url": "https://2023.antflix.net#665.24" + }, + { + "body": "Protective cages or adequate shielding shall be used to guard dielectric heating applicators. Interlock switches shall be used on all hinged access doors, sliding panels, or other easy means of access to the applicator. All interlock switches shall be connected in such a manner as to remove all power from the applicator when any one of the access doors or panels is open.", + "displayTitle": "665.25 Dielectric Heating Applicator Shielding", + "children": [], + "url": "https://2023.antflix.net#665.25" + }, + { + "body": "Bonding to the equipment grounding conductor or inter-unit bonding, or both, shall be used wherever required for circuit operation, and for limiting to a safe value radio frequency voltages between all exposed non-current-carrying parts of the equipment and earth ground, between all equipment parts and surrounding objects, and between such objects and earth ground. Such connection to the equipment grounding conductor and bonding shall be installed in accordance with Article 250, Parts II and V. Informational Note: Under certain conditions, contact between the object being heated and the applicator results in an unsafe condition, such as eruption of heated materials. Grounding of the object being heated and ground detection can be used to prevent this unsafe condition.", + "displayTitle": "665.26 Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#665.26" + }, + { + "body": "Each heating equipment shall be provided with a nameplate giving the manufacturer's name and model identification and the following input data: line volts, frequency, number of phases, maximum current, full-load kilovolt-amperes (kVA), and full-load power factor. Additional data shall be permitted.", + "displayTitle": "665.27 Marking", + "children": [], + "url": "https://2023.antflix.net#665.27" + } + ], + "url": "https://2023.antflix.net#665" + }, + { + "displayTitle": "Article 668 Electrolytic Cells", + "children": [ + { + "body": "This article applies to the installation of the electrical components and accessory equipment of electrolytic cells, electrolytic cell lines, and process power supply for the production of aluminum, cadmium, chlorine, copper, fluorine, hydrogen peroxide, magnesium, sodium, sodium chlorate, and zinc. Not covered by this article are cells used as a source of electric energy and for electroplating processes and cells used for the production of hydrogen. Informational Note No. 1: In general, any cell line or group of cell lines operated as a unit for the production of a particular metal, gas, or chemical compound may differ from any other cell lines producing the same product because of variations in the particular raw materials used, output capacity, use of proprietary methods or process practices, or other modifying factors to the extent that detailed Code requirements become overly restrictive and do not accomplish the stated purpose of this Code. Informational Note No. 2: See IEEE 463-2013. Standard for Electrical Safety Practices in Electrolytic Cell Line Working Zones, for further information.", + "displayTitle": "668.1 Scope", + "children": [], + "url": "https://2023.antflix.net#668.1" + }, + { + "displayTitle": "668.3 Other Articles", + "children": [ + { + "body": "Chapters 1 through 4 shall apply to services, feeders, branch circuits, and apparatus for supplying lighting, ventilating, material handling, and the like that are outside the electrolytic cell line working zone.", + "displayTitle": "(A) Lighting, Ventilating, Material Handling", + "children": [], + "url": "https://2023.antflix.net#668.3_(A)" + }, + { + "body": "Those elements of a cell line power-supply system that are not electrically connected to the cell supply system, such as the primary winding of a two-winding transformer, the motor of a motor-generator set, feeders, branch circuits, disconnecting means, motor controllers, and overload protective equipment, shall be required to comply with all applicable sections of this Code.", + "displayTitle": "(B) Systems Not Electrically Connected", + "children": [], + "url": "https://2023.antflix.net#668.3_(B)" + }, + { + "body": "Electrolytic cell lines shall comply with the provisions of Chapters 1 through 4 except as amended in 668.3(C)(1) through (C)(4).", + "displayTitle": "(C) Electrolytic Cell Lines", + "children": [ + { + "body": "The electrolytic cell line conductors shall not be required to comply with Articles 110, 210, 215, 220, and 225. See 668.12.", + "displayTitle": "(1) Conductors", + "children": [], + "url": "https://2023.antflix.net#668.3_(C)_(1)" + }, + { + "body": "Overcurrent protection of electrolytic cell dc process power circuits shall not be required to comply with the requirements of Article 240.", + "displayTitle": "(2) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#668.3_(C)_(2)" + }, + { + "body": "Except as required by this article, equipment located or used within the electrolytic cell line working zone or associated with the cell line dc power circuits shall not be required to comply with Article 250.", + "displayTitle": "(3) Grounding", + "children": [], + "url": "https://2023.antflix.net#668.3_(C)_(3)" + }, + { + "body": "The electrolytic cells, cell line attachments, and the wiring of auxiliary equipment and devices within the cell line working zone shall not be required to comply with Articles 110, 210, 215, 220, and 225. See 668.30. Informational Note: See 668.15 for equipment, apparatus, and structural component grounding.", + "displayTitle": "(4) Working Zone", + "children": [], + "url": "https://2023.antflix.net#668.3_(C)_(4)" + } + ], + "url": "https://2023.antflix.net#668.3_(C)" + } + ], + "url": "https://2023.antflix.net#668.3" + }, + { + "displayTitle": "668.10 Cell Line Working Zone", + "children": [ + { + "body": "The space envelope of the cell line working zone shall encompass spaces that meet any of the following conditions: Is within 2.5 m (96 in.) above energized surfaces of electrolytic cell lines or their energized attachmentsIs below energized surfaces of electrolytic cell lines or their energized attachments, provided the headroom in the space beneath is less than 2.5 m (96 in.)Is within 1.0 m (42 in.) horizontally from energized surfaces of electrolytic cell lines or their energized attachments or from the space envelope described in 668.10(A)(1) or (A)(2)", + "displayTitle": "(A) Area Covered", + "children": [], + "url": "https://2023.antflix.net#668.10_(A)" + }, + { + "body": "The cell line working zone shall not be required to extend through or beyond walls, floors, roofs, partitions, barriers, or the like.", + "displayTitle": "(B) Area Not Covered", + "children": [], + "url": "https://2023.antflix.net#668.10_(B)" + } + ], + "url": "https://2023.antflix.net#668.10" + }, + { + "displayTitle": "668.11 Direct-Current Cell Line Process Power Supply", + "children": [ + { + "body": "The direct-current cell line process power supply conductors shall not be required to be grounded.", + "displayTitle": "(A) Not Grounded", + "children": [], + "url": "https://2023.antflix.net#668.11_(A)" + }, + { + "body": "All metal enclosures of power-supply apparatus for the direct-current cell line process operating with a power supply over 50 volts shall be grounded by either of the following means: Through protective relaying equipmentBy a minimum 2/0 AWG copper grounding electrode conductor or a conductor of equal or greater conductance", + "displayTitle": "(B) Metal Enclosures Grounded", + "children": [], + "url": "https://2023.antflix.net#668.11_(B)" + }, + { + "body": "The grounding electrode connections required by 668.11(B) shall be installed in accordance with 250.8, 250.10, 250.12, 250.68, and 250.70.", + "displayTitle": "(C) Grounding Requirements", + "children": [], + "url": "https://2023.antflix.net#668.11_(C)" + } + ], + "url": "https://2023.antflix.net#668.11" + }, + { + "displayTitle": "668.12 Cell Line Conductors", + "children": [ + { + "body": "Cell line conductors shall be either bare, covered, or insulated and of copper, aluminum, copper-clad aluminum, steel, or other suitable material.", + "displayTitle": "(A) Insulation and Material", + "children": [], + "url": "https://2023.antflix.net#668.12_(A)" + }, + { + "body": "Cell line conductors shall be of such cross-sectional area that the temperature rise under maximum load conditions and at maximum ambient shall not exceed the safe operating temperature of the conductor insulation or the material of the conductor supports.", + "displayTitle": "(B) Size", + "children": [], + "url": "https://2023.antflix.net#668.12_(B)" + }, + { + "body": "Cell line conductors shall be joined by bolted, welded, clamped, or compression connectors.", + "displayTitle": "(C) Connections", + "children": [], + "url": "https://2023.antflix.net#668.12_(C)" + } + ], + "url": "https://2023.antflix.net#668.12" + }, + { + "displayTitle": "668.13 Disconnecting Means", + "children": [ + { + "body": "Where more than one direct-current cell line process power supply serves the same cell line, a disconnecting means shall be provided on the cell line circuit side of each power supply to disconnect it from the cell line circuit.", + "displayTitle": "(A) More Than One Process Power Supply", + "children": [], + "url": "https://2023.antflix.net#668.13_(A)" + }, + { + "body": "Removable links or removable conductors shall be permitted to be used as the disconnecting means.", + "displayTitle": "(B) Removable Links or Conductors", + "children": [], + "url": "https://2023.antflix.net#668.13_(B)" + } + ], + "url": "https://2023.antflix.net#668.13" + }, + { + "displayTitle": "668.14 Shunting Means", + "children": [ + { + "body": "Partial or total shunting of cell line circuit current around one or more cells shall be permitted.", + "displayTitle": "(A) Partial or Total Shunting", + "children": [], + "url": "https://2023.antflix.net#668.14_(A)" + }, + { + "body": "The conductors, switches, or combination of conductors and switches used for shunting one or more cells shall comply with the applicable requirements of 668.12.", + "displayTitle": "(B) Shunting One or More Cells", + "children": [], + "url": "https://2023.antflix.net#668.14_(B)" + } + ], + "url": "https://2023.antflix.net#668.14" + }, + { + "body": "For equipment, apparatus, and structural components that are required to be grounded in accordance with Article 668, Article 250, Part III, for a local grounding electrode system shall apply, except a water pipe electrode shall not be required to be used. Any electrode or combination of electrodes described in 250.52 shall be permitted.", + "displayTitle": "668.15 Grounding", + "children": [], + "url": "https://2023.antflix.net#668.15" + }, + { + "displayTitle": "668.20 Portable Electrical Equipment", + "children": [ + { + "body": "The frames and enclosures of portable electrical equipment used within the cell line working zone shall not be grounded. Exception No. 1: Where the cell line voltage does not exceed 200 volts dc, these frames and enclosures shall be permitted to be grounded. Exception No. 2: These frames and enclosures shall be permitted to be grounded where guarded.", + "displayTitle": "(A) Portable Electrical Equipment Not to Be Grounded", + "children": [], + "url": "https://2023.antflix.net#668.20_(A)" + }, + { + "body": "Electrically powered, hand-held, cord-connected portable equipment with ungrounded frames or enclosures used within the cell line working zone shall be connected to receptacle circuits that have only ungrounded conductors such as a branch circuit supplied by an isolating transformer with an ungrounded secondary.", + "displayTitle": "(B) Isolating Transformers", + "children": [], + "url": "https://2023.antflix.net#668.20_(B)" + }, + { + "body": "Ungrounded portable electrical equipment shall be distinctively marked and shall employ plugs and receptacles of a configuration that prevents connection of this equipment to grounding receptacles and that prevents inadvertent interchange of ungrounded and grounded portable electrical equipment.", + "displayTitle": "(C) Marking", + "children": [], + "url": "https://2023.antflix.net#668.20_(C)" + } + ], + "url": "https://2023.antflix.net#668.20" + }, + { + "displayTitle": "668.21 Power-Supply Circuits and Receptacles for Portable Electrical Equipment", + "children": [ + { + "body": "Circuits supplying power to ungrounded receptacles for hand-held, cord-connected equipment shall be electrically isolated from any distribution system supplying areas other than the cell line working zone and shall be ungrounded. Power for these circuits shall be supplied through isolating transformers. Primaries of such transformers shall operate at not more than 1000 volts between conductors and shall be provided with proper overcurrent protection. The secondary voltage of such transformers shall not exceed 300 volts between conductors, and all circuits supplied from such secondaries shall be ungrounded and shall have an approved overcurrent device of proper rating in each conductor.", + "displayTitle": "(A) Isolated Circuits", + "children": [], + "url": "https://2023.antflix.net#668.21_(A)" + }, + { + "body": "Receptacles and their mating plugs for ungrounded equipment shall not have provision for an equipment grounding conductor and shall be of a configuration that prevents their use for equipment required to be grounded.", + "displayTitle": "(B) Noninterchangeability", + "children": [], + "url": "https://2023.antflix.net#668.21_(B)" + }, + { + "body": "Receptacles on circuits supplied by an isolating transformer with an ungrounded secondary shall be a distinctive configuration, shall be distinctively marked, and shall not be used in any other location in the plant.", + "displayTitle": "(C) Marking", + "children": [], + "url": "https://2023.antflix.net#668.21_(C)" + } + ], + "url": "https://2023.antflix.net#668.21" + }, + { + "displayTitle": "668.30 Fixed and Portable Electrical Equipment", + "children": [ + { + "body": "Alternating-current systems supplying fixed and portable electrical equipment within the cell line working zone shall not be required to be grounded.", + "displayTitle": "(A) Electrical Equipment Not Required to Be Grounded", + "children": [], + "url": "https://2023.antflix.net#668.30_(A)" + }, + { + "body": "Exposed conductive surfaces, such as electrical equipment housings, cabinets, boxes, motors, raceways, and the like, that are within the cell line working zone shall not be required to be grounded.", + "displayTitle": "(B) Exposed Conductive Surfaces Not Required to Be Grounded", + "children": [], + "url": "https://2023.antflix.net#668.30_(B)" + }, + { + "body": "Auxiliary electrical equipment such as motors, transducers, sensors, control devices, and alarms, mounted on an electrolytic cell or other energized surface, shall be connected to premises wiring systems using any of the following: Multiconductor hard usage cord.Wire or cable in suitable raceways or metal or nonmetallic cable trays. If metal conduit, cable tray, armored cable, or similar metallic systems are used, they shall be installed with insulating breaks such that they do not cause a potentially hazardous electrical condition.", + "displayTitle": "(C) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#668.30_(C)" + }, + { + "body": "Circuit protection shall not be required for control and instrumentation that are totally within the cell line working zone.", + "displayTitle": "(D) Circuit Protection", + "children": [], + "url": "https://2023.antflix.net#668.30_(D)" + }, + { + "body": "Bonding of fixed electrical equipment to the energized conductive surfaces of the cell line, its attachments, or auxiliaries shall be permitted. Where fixed electrical equipment is mounted on an energized conductive surface, it shall be bonded to that surface.", + "displayTitle": "(E) Bonding", + "children": [], + "url": "https://2023.antflix.net#668.30_(E)" + } + ], + "url": "https://2023.antflix.net#668.30" + }, + { + "body": "Auxiliary nonelectrical connections, such as air hoses, water hoses, and the like, to an electrolytic cell, its attachments, or auxiliary equipment shall not have continuous conductive reinforcing wire, armor, braids, and the like. Hoses shall be of a nonconductive material.", + "displayTitle": "668.31 Auxiliary Nonelectrical Connections", + "children": [], + "url": "https://2023.antflix.net#668.31" + }, + { + "displayTitle": "668.32 Cranes and Hoists", + "children": [ + { + "body": "The conductive surfaces of cranes and hoists that enter the cell line working zone shall not be required to be grounded. The portion of an overhead crane or hoist that contacts an energized electrolytic cell or energized attachments shall be insulated from ground.", + "displayTitle": "(A) Conductive Surfaces to Be Insulated From Ground", + "children": [], + "url": "https://2023.antflix.net#668.32_(A)" + }, + { + "body": "Remote crane or hoist controls that could introduce hazardous electrical conditions into the cell line working zone shall employ one or more of the following systems: Isolated and ungrounded control circuit in accordance with 668.21(A)Nonconductive rope operatorPendant pushbutton with nonconductive supporting means and having nonconductive surfaces or ungrounded exposed conductive surfacesRadio", + "displayTitle": "(B) Hazardous Electrical Conditions", + "children": [], + "url": "https://2023.antflix.net#668.32_(B)" + } + ], + "url": "https://2023.antflix.net#668.32" + }, + { + "body": "General-purpose electrical equipment enclosures shall be permitted where a natural draft ventilation system prevents the accumulation of gases.", + "displayTitle": "668.40 Enclosures", + "children": [], + "url": "https://2023.antflix.net#668.40" + } + ], + "url": "https://2023.antflix.net#668" + }, + { + "displayTitle": "Article 669 Electroplating", + "children": [ + { + "body": "This article applies to the installation of the electrical components and accessory equipment that supply the power and controls for electroplating, anodizing, electropolishing, and electrostripping. For purposes of this article, the term electroplating shall be used to identify any or all of these processes.", + "displayTitle": "669.1 Scope", + "children": [], + "url": "https://2023.antflix.net#669.1" + }, + { + "body": "Equipment for use in electroplating processes shall be identified for such service.", + "displayTitle": "669.3 General", + "children": [], + "url": "https://2023.antflix.net#669.3" + }, + { + "body": "Branch-circuit conductors supplying one or more units of equipment shall have an ampacity of not less than 125 percent of the total connected load. The ampacities for busbars shall be in accordance with 366.23.", + "displayTitle": "669.5 Branch-Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#669.5" + }, + { + "body": "Conductors connecting the electrolyte tank equipment to the conversion equipment shall be in accordance with 669.6(A) and (B).", + "displayTitle": "669.6 Wiring Methods", + "children": [ + { + "body": "Insulated conductors shall be permitted to be run without insulated support, provided they are protected from physical damage. Bare copper or aluminum conductors shall be permitted where supported on insulators.", + "displayTitle": "(A) Systems Not Exceeding 60 Volts Direct Current", + "children": [], + "url": "https://2023.antflix.net#669.6_(A)" + }, + { + "body": "Insulated conductors shall be permitted to be run on insulated supports, provided they are protected from physical damage. Bare copper or aluminum conductors shall be permitted where supported on insulators and guarded against accidental contact up to the point of termination in accordance with 110.27.", + "displayTitle": "(B) Systems Exceeding 60 Volts Direct Current", + "children": [], + "url": "https://2023.antflix.net#669.6_(B)" + } + ], + "url": "https://2023.antflix.net#669.6" + }, + { + "body": "Warning signs shall be posted to indicate the presence of bare conductors. The warning sign(s) or label(s) shall comply with 110.21(B).", + "displayTitle": "669.7 Warning Signs", + "children": [], + "url": "https://2023.antflix.net#669.7" + }, + { + "displayTitle": "669.8 Disconnecting Means", + "children": [ + { + "body": "Where more than one power supply serves the same dc system, a disconnecting means shall be provided on the dc side of each power supply.", + "displayTitle": "(A) More Than One Power Supply", + "children": [], + "url": "https://2023.antflix.net#669.8_(A)" + }, + { + "body": "Removable links or removable conductors shall be permitted to be used as the disconnecting means.", + "displayTitle": "(B) Removable Links or Conductors", + "children": [], + "url": "https://2023.antflix.net#669.8_(B)" + } + ], + "url": "https://2023.antflix.net#669.8" + }, + { + "body": "Direct-current conductors shall be protected from overcurrent by one or more of the following: Fuses or circuit breakersA current-sensing device that operates a disconnecting meansOther approved means", + "displayTitle": "669.9 Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#669.9" + } + ], + "url": "https://2023.antflix.net#669" + }, + { + "displayTitle": "Article 670 Industrial Machinery", + "children": [ + { + "body": "This article covers the nameplate data for, overvoltage protection for, and the size and overcurrent protection of supply conductors to industrial machinery. Informational Note No. 1: See NFPA 79, Electrical Standard for Industrial Machinery, for further information. Informational Note No. 2: See 110.26 for information on the workspace requirements for equipment containing supply conductor terminals. Informational Note No. 3: See NFPA 79, Electrical Standard for Industrial Machinery, for information on the workspace requirements for machine power and control equipment.", + "displayTitle": "670.1 Scope", + "children": [], + "url": "https://2023.antflix.net#670.1" + }, + { + "body": "Informational Note: See 430.22(E) and 430.26 for duty cycle requirements.", + "displayTitle": "670.3 Machine Nameplate Data", + "children": [ + { + "body": "A permanent nameplate shall be attached to the outside of the control equipment enclosure or on the machine immediately adjacent to the main control equipment enclosure that is visible after installation. The nameplate shall include the following information: Supply voltage, number of phases, frequency, and full-load currentMaximum ampere rating of the short-circuit and ground-fault protective deviceAmpere rating of largest motor, from the motor nameplate, or loadShort-circuit current rating of the machine industrial control panel based on one of the following:Short-circuit current rating of a listed and labeled machine control enclosure or assemblyShort-circuit current rating established using an approved methodInformational Note: See UL 508A-2017, Industrial Control Panels, Supplement SB, for an example of an approved method.Electrical diagram number(s) or the number of the index to the electrical drawingsThe full-load current shown on the nameplate shall not be less than the sum of the full-load currents required for all motors and other equipment that can be in operation at the same time under normal conditions of use. Where unusual type loads, duty cycles, and so forth require oversized conductors or permit reduced-size conductors, the required capacity shall be included in the marked \"full-load current.\" Where more than one incoming supply circuit is to be provided, the nameplate shall state the preceding information for each circuit.", + "displayTitle": "(A) Permanent Nameplate", + "children": [], + "url": "https://2023.antflix.net#670.3_(A)" + }, + { + "body": "Where overcurrent protection is provided in accordance with 670.4(C), the machine shall be marked \"overcurrent protection provided at machine supply terminals.\"", + "displayTitle": "(B) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#670.3_(B)" + } + ], + "url": "https://2023.antflix.net#670.3" + }, + { + "displayTitle": "670.4 Supply Conductors and Overcurrent Protection", + "children": [ + { + "body": "The size of the supply conductor shall be such as to have an ampacity not less than 125 percent of the full-load current rating of all resistance heating loads plus 125 percent of the full-load current rating of the highest rated motor plus the sum of the full-load current ratings of all other connected motors and apparatus, based on their duty cycle, that may be in operation at the same time. Informational Note No. 1: See Table 310.16 through Table 310.20 for ampacity of conductors rated 2000 volts and below. Informational Note No. 2: See 430.22(E) and 430.26 for duty cycle requirements.", + "displayTitle": "(A) Size", + "children": [], + "url": "https://2023.antflix.net#670.4_(A)" + }, + { + "body": "A machine shall be considered as an individual unit and therefore shall be provided with disconnecting means. The disconnecting means shall be permitted to be supplied by branch circuits protected by either fuses or circuit breakers. The disconnecting means shall not be required to incorporate overcurrent protection. Informational Note: See NFPA 70E, Standard for Electrical Safety in the Workplace, which provides guidance for creating an electrically safe work condition for performing maintenance or other work on the machine.", + "displayTitle": "(B) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#670.4_(B)" + }, + { + "body": "Where furnished as part of the machine, overcurrent protection for each supply circuit shall consist of a single circuit breaker or set of fuses, the machine shall bear the marking required in 670.3, and the supply conductors shall be considered either as feeders or as taps as covered by 240.21. The rating or setting of the overcurrent protective device for the circuit supplying the machine shall not be greater than the sum of the largest rating or setting of the branch-circuit short-circuit and ground-fault protective device provided with the machine, plus 125 percent of the full-load current rating of all resistance heating loads, plus the sum of the full-load currents of all other motors and apparatus that could be in operation at the same time. Exception: Where one or more instantaneous trip circuit breakers or motor short-circuit protectors are used for motor branch-circuit short-circuit and ground-fault protection as permitted by 430.52(C), the procedure specified in 670.4(C) for determining the maximum rating of the protective device for the circuit supplying the machine shall apply with the following provision: For the purpose of the calculation, each instantaneous trip circuit breaker or motor short-circuit protector shall be assumed to have a rating not exceeding the maximum percentage of motor full-load current permitted by Table 430.52(C)(1) for the type of machine supply circuit protective device employed. Where no branch-circuit short-circuit and ground-fault protective device is provided with the machine, the rating or setting of the overcurrent protective device shall be based on 430.52 and 430.53, as applicable.", + "displayTitle": "(C) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#670.4_(C)" + } + ], + "url": "https://2023.antflix.net#670.4" + }, + { + "displayTitle": "670.5 Short-Circuit Current Rating", + "children": [ + { + "body": "Industrial machinery shall not be installed where the available fault current exceeds its short-circuit current rating as marked in accordance with 670.3(A)(4).", + "displayTitle": "(A) Installation", + "children": [], + "url": "https://2023.antflix.net#670.5_(A)" + }, + { + "body": "Industrial machinery shall be legibly marked in the field with the available fault current. The field marking(s) shall include the date the available fault current calculation was performed and be of sufficient durability to withstand the environment involved.", + "displayTitle": "(B) Available Short-Circuit Current Field Marking", + "children": [], + "url": "https://2023.antflix.net#670.5_(B)" + } + ], + "url": "https://2023.antflix.net#670.5" + }, + { + "body": "Industrial machinery with safety circuits shall have overvoltage protection.", + "displayTitle": "670.6 Overvoltage Protection", + "children": [], + "url": "https://2023.antflix.net#670.6" + } + ], + "url": "https://2023.antflix.net#670" + }, + { + "displayTitle": "Article 675 Electrically Driven or Controlled Irrigation Machines", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_100_I" + }, + { + "body": "This article applies to electrically driven or controlled irrigation machines, and to the branch circuits and controllers for such equipment.", + "displayTitle": "675.1 Scope", + "children": [], + "url": "https://2023.antflix.net#675.1" + }, + { + "displayTitle": "675.4 Irrigation Cable", + "children": [ + { + "body": "The cable used to interconnect enclosures on the structure of an irrigation machine shall be an assembly of stranded, insulated conductors with nonhygroscopic and nonwicking filler in a core of moisture- and flame-resistant nonmetallic material overlaid with a metallic covering and jacketed with a moisture-, corrosion-, and sunlight-resistant nonmetallic material. The conductor insulation shall be of a type listed in Table 310.4(1) for an operating temperature of 75\u00b0C (167\u00b0F) or higher and for use in wet locations. The core insulating material thickness shall not be less than 0.76 mm (30 mils), and the metallic overlay thickness shall be not less than 0.20 mm (8 mils). The jacketing material thickness shall be not less than 1.27 mm (50 mils). A composite of power, control, and grounding conductors in the cable shall be permitted.", + "displayTitle": "(A) Construction", + "children": [], + "url": "https://2023.antflix.net#675.4_(A)" + }, + { + "body": "Installation of other listed cables complying with the construction requirements of 675.4(A) shall be permitted.", + "displayTitle": "(B) Alternate Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#675.4_(B)" + }, + { + "body": "Irrigation cable shall be secured by straps, hangers, or similar fittings identified for the purpose and so installed as not to damage the cable. Cable shall be supported at intervals not exceeding 1.2 m (4 ft).", + "displayTitle": "(C) Supports", + "children": [], + "url": "https://2023.antflix.net#675.4_(C)" + }, + { + "body": "Fittings shall be used at all points where irrigation cable terminates. The fittings shall be designed for use with the cable and shall be suitable for the conditions of service.", + "displayTitle": "(D) Fittings", + "children": [], + "url": "https://2023.antflix.net#675.4_(D)" + } + ], + "url": "https://2023.antflix.net#675.4" + }, + { + "body": "The signal and control conductors of a raceway or cable shall not be counted for the purpose of ampacity adjustment as required in 310.15(C)(1).", + "displayTitle": "675.5 More Than Three Conductors in a Raceway or Cable", + "children": [], + "url": "https://2023.antflix.net#675.5" + }, + { + "body": "The main control panel shall be provided with a nameplate giving the following information: The manufacturer's name, the rated voltage, the phase, and the frequencyThe current rating of the machineThe rating of the main disconnecting means and size of overcurrent protection required", + "displayTitle": "675.6 Marking on Main Control Panel", + "children": [], + "url": "https://2023.antflix.net#675.6" + }, + { + "body": "Where intermittent duty is not involved. Article 430 shall be used for determining ratings for controllers, disconnecting means, conductors, and the like. Where irrigation machines have inherent intermittent duty, the determinations of equivalent current ratings in 675.7(A) and (B) shall be used.", + "displayTitle": "675.7 Equivalent Current Ratings", + "children": [ + { + "body": "The equivalent continuous-current rating for the selection of branch-circuit conductors and overcurrent protection shall be equal to 125 percent of the motor nameplate full-load current rating of the largest motor, plus a quantity equal to the sum of each of the motor nameplate full-load current ratings of all remaining motors on the circuit, multiplied by the maximum percent duty cycle at which they can continuously operate.", + "displayTitle": "(A) Continuous-Current Rating", + "children": [], + "url": "https://2023.antflix.net#675.7_(A)" + }, + { + "body": "The equivalent locked-rotor current rating shall be equal to the numerical sum of the locked-rotor current of the two largest motors plus 100 percent of the sum of the motor nameplate full-load current ratings of all the remaining motors on the circuit.", + "displayTitle": "(B) Locked-Rotor Current", + "children": [], + "url": "https://2023.antflix.net#675.7_(B)" + } + ], + "url": "https://2023.antflix.net#675.7" + }, + { + "displayTitle": "675.8 Disconnecting Means", + "children": [ + { + "body": "A controller that is used to start and stop the complete machine shall meet all of the following requirements: An equivalent continuous current rating not less than specified in 675.7(A) or 675.22(A)A horsepower rating not less than the value from Table 430.251(A) and Table 430.251(B), based on the equivalent locked-rotor current specified in 675.7(B) or 675.22(B)Exception: A listed molded case switch shall not require a horsepower rating.", + "displayTitle": "(A) Main Controller", + "children": [], + "url": "https://2023.antflix.net#675.8_(A)" + }, + { + "body": "The main disconnecting means for the machine shall provide overcurrent protection, shall be at the point of connection of electric power to the machine, or shall be in sight from the machine, and it shall be readily accessible and lockable open in accordance with 110.25. This disconnecting means shall have a horsepower and current rating not less than required for the main controller. Exception No. 1: Circuit breakers without marked horsepower ratings shall be permitted in accordance with 430.109. Exception No. 2: A listed molded case switch without marked horsepower ratings shall be permitted.", + "displayTitle": "(B) Main Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#675.8_(B)" + }, + { + "body": "A disconnecting means shall be provided to simultaneously disconnect all ungrounded conductors for each motor and controller and shall be located as required by Article 430, Part IX. The disconnecting means shall not be required to be readily accessible.", + "displayTitle": "(C) Disconnecting Means for Individual Motors and Controllers", + "children": [], + "url": "https://2023.antflix.net#675.8_(C)" + } + ], + "url": "https://2023.antflix.net#675.8" + }, + { + "body": "The branch-circuit conductors shall have an ampacity not less than specified in 675.7(A) or 675.22(A).", + "displayTitle": "675.9 Branch-Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#675.9" + }, + { + "displayTitle": "675.10 Several Motors on One Branch Circuit", + "children": [ + { + "body": "Several motors, each not exceeding 2 hp rating, shall be permitted to be used on an irrigation machine circuit protected at not more than 30 amperes at 1000 volts, nominal, or less, provided all of the following conditions are met: The full-load rating of any motor in the circuit shall not exceed 6 amperes.Each motor in the circuit shall have individual overload protection in accordance with 430.32.Taps to individual motors shall not be smaller than 14 AWG copper and not more than 7.5 m (25 ft) in length.", + "displayTitle": "(A) Protection Required", + "children": [], + "url": "https://2023.antflix.net#675.10_(A)" + }, + { + "body": "Individual branch-circuit short-circuit protection for motors and motor controllers shall not be required where the requirements of 675.10(A) are met.", + "displayTitle": "(B) Individual Protection Not Required", + "children": [], + "url": "https://2023.antflix.net#675.10_(B)" + } + ], + "url": "https://2023.antflix.net#675.10" + }, + { + "displayTitle": "675.11 Collector Rings", + "children": [ + { + "body": "Collector rings shall have a current rating not less than 125 percent of the full-load current of the largest device served plus the full-load current of all other devices served, or as determined from 675.7(A) or 675.22(A).", + "displayTitle": "(A) Transmitting Current for Power Purposes", + "children": [], + "url": "https://2023.antflix.net#675.11_(A)" + }, + { + "body": "Collector rings for control and signal purposes shall have a current rating not less than 125 percent of the full-load current of the largest device served plus the full-load current of all other devices served.", + "displayTitle": "(B) Control and Signal Purposes", + "children": [], + "url": "https://2023.antflix.net#675.11_(B)" + }, + { + "body": "The collector ring used for grounding shall have a current rating not less than that sized in accordance with 675.11 (A).", + "displayTitle": "(C) Grounding", + "children": [], + "url": "https://2023.antflix.net#675.11_(C)" + }, + { + "body": "Collector rings shall be protected from the expected environment and from accidental contact by means of a suitable enclosure.", + "displayTitle": "(D) Protection", + "children": [], + "url": "https://2023.antflix.net#675.11_(D)" + } + ], + "url": "https://2023.antflix.net#675.11" + }, + { + "body": "The following equipment shall be grounded: All electrical equipment on the irrigation machineAll electrical equipment associated with the irrigation machineMetal junction boxes and enclosuresControl panels or control equipment that supplies or controls electrical equipment to the irrigation machineException: Grounding shall not be required on machines where all of the following provisions are met:The machine is electrically controlled but not electrically driven.The control voltage is 30 volts or less.The control or signal circuits are current limited as specified in Chapter 9, Tables 11(A) and 11(B).", + "displayTitle": "675.12 Grounding", + "children": [], + "url": "https://2023.antflix.net#675.12" + }, + { + "body": "Machines that require grounding shall have a non-current-carrying equipment grounding conductor provided as an integral part of each cord, cable, or raceway. This equipment grounding conductor shall be sized not less than the largest supply conductor in each cord, cable, or raceway. Feeder circuits supplying power to irrigation machines shall have an equipment grounding conductor sized according to Table 250.122.", + "displayTitle": "675.13 Methods of Grounding", + "children": [], + "url": "https://2023.antflix.net#675.13" + }, + { + "body": "Where electrical grounding is required on an irrigation machine, the metallic structure of the machine, metallic conduit, or metallic sheath of cable shall be connected to the equipment grounding conductor. Metal-to-metal contact with a part that is connected to the equipment grounding conductor and the non-current-carrying parts of the machine shall be considered as an acceptable bonding path.", + "displayTitle": "675.14 Bonding", + "children": [], + "url": "https://2023.antflix.net#675.14" + }, + { + "body": "If an irrigation machine has a stationary point, a grounding electrode system in accordance with Article 250, Part III, shall be connected to the machine at the stationary point for lightning protection.", + "displayTitle": "675.15 Lightning Protection", + "children": [], + "url": "https://2023.antflix.net#675.15" + }, + { + "body": "Equipment within an enclosure receiving electric energy from more than one source shall not be required to have a disconnecting means for the additional source if its voltage is 30 volts or less and it meets the requirements of Part II of Article 725.", + "displayTitle": "675.16 Energy From More Than One Source", + "children": [], + "url": "https://2023.antflix.net#675.16" + }, + { + "body": "External plugs and connectors on the equipment shall be of the weatherproof type. Unless provided solely for the connection of circuits meeting the requirements of Part II of Article 725, external plugs and connectors shall be constructed as specified in 250.124(A).", + "displayTitle": "675.17 Connectors", + "children": [], + "url": "https://2023.antflix.net#675.17" + }, + { + "displayTitle": "Part II Center Pivot Irrigation Machines", + "children": [], + "url": "https://2023.antflix.net#divider_100_II" + }, + { + "body": "Part II covers additional special requirements that are peculiar to center pivot irrigation machines. Article 100 for the definition of Center Pivot Irrigation Machine.", + "displayTitle": "675.21 General", + "children": [], + "url": "https://2023.antflix.net#675.21" + }, + { + "body": "To establish ratings of controllers, disconnecting means, conductors, and the like, for the inherent intermittent duty of center pivot irrigation machines, the determinations in 675.22(A) and (B) shall be used.", + "displayTitle": "675.22 Equivalent Current Ratings", + "children": [ + { + "body": "The equivalent continuous-current rating for the selection of branch-circuit conductors and branch-circuit devices shall be equal to 125 percent of the motor nameplate full-load current rating of the largest motor plus 60 percent of the sum of the motor nameplate full-load current ratings of all remaining motors on the circuit.", + "displayTitle": "(A) Continuous-Current Rating", + "children": [], + "url": "https://2023.antflix.net#675.22_(A)" + }, + { + "body": "The equivalent locked-rotor current rating shall be equal to the numerical sum of two times the locked-rotor current of the largest motor plus 80 percent of the sum of the motor nameplate full-load current ratings of all the remaining motors on the circuit.", + "displayTitle": "(B) Locked-Rotor Current", + "children": [], + "url": "https://2023.antflix.net#675.22_(B)" + } + ], + "url": "https://2023.antflix.net#675.22" + } + ], + "url": "https://2023.antflix.net#675" + }, + { + "displayTitle": "Article 680 Swimming Pools, Fountains, and Similar Installations", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_101_I" + }, + { + "body": "The provisions of this article apply to the construction and installation of electrical wiring for, and equipment in or adjacent to, all swimming, wading, therapeutic, and decorative pools; fountains; hot tubs; spas; and hydromassage bathtubs, whether permanently installed or storable, and to metallic auxiliary equipment, such as pumps, filters, and similar equipment. The term body of water used throughout Part I applies to all bodies of water covered in this scope unless otherwise amended.", + "displayTitle": "680.1 Scope", + "children": [], + "url": "https://2023.antflix.net#680.1" + }, + { + "body": "The authority having jurisdiction shall be permitted to require periodic inspection and testing.", + "displayTitle": "680.4 Inspections After Installation", + "children": [], + "url": "https://2023.antflix.net#680.4" + }, + { + "displayTitle": "680.5 Ground-Fault Circuit-Interrupter (GFCI) and Special Purpose Ground-Fault Circuit-Interrupter (SPGFCI) Protection", + "children": [ + { + "body": "The GFCI and SPGFCI requirements in this article, unless otherwise noted, are in addition to the requirements in 210.8.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#680.5_(A)" + }, + { + "body": "Where required in this article, ground-fault protection of receptacles and outlets on branch circuits rated 150 volts or less to ground and 60 amperes or less, single- or 3-phase, shall be provided with a Class A GFCI. Exception: Receptacles and outlets that are part of listed equipment with ratings not exceeding the low-voltage contact limit that are supplied by listed transformers or power supplies that comply with 680.23(A)(2) shall not be required to be provided with ground-fault protection. Informational Note: The high leg of a 120/240-volt 4-wire delta-connected system, and the two ungrounded phases of a corner-grounded delta system have a voltage to ground greater than 150 volts, exceeding the limit for a Class A GFCI.", + "displayTitle": "(B) 150 Volts or Less to Ground", + "children": [], + "url": "https://2023.antflix.net#680.5_(B)" + }, + { + "body": "Where required in this article, ground-fault protection of receptacles and outlets on branch circuits operating at voltages above 150 volts to ground, not exceeding 480 volts phase-to-phase, single- or 3-phase, shall be provided with SPGFCI protection not to exceed 20-mA ground-fault trip current. Informational Note: See UL 943C, Outline of Investigation for Special Purpose Ground-Fault Circuit Interrupters, for information on Classes C, D, and E ground-fault circuit interrupters.", + "displayTitle": "(C) Above 150 Volts to Ground", + "children": [], + "url": "https://2023.antflix.net#680.5_(C)" + } + ], + "url": "https://2023.antflix.net#680.5" + }, + { + "body": "All electrical equipment covered by this article shall be listed.", + "displayTitle": "680.6 Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#680.6" + }, + { + "displayTitle": "680.7 Grounding and Bonding", + "children": [ + { + "body": "Feeders and branch circuits installed in a corrosive environment or wet location shall contain an EGC that is an insulated copper conductor sized in accordance with Table 250.122, but not smaller than 12 AWG.", + "displayTitle": "(A) Feeders and Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#680.7_(A)" + }, + { + "body": "The flexible cord shall contain an EGC that is an insulated copper conductor sized in accordance with Table 250.122, but not smaller than 12 AWG. The flexible cord shall terminate in a grounding-type attachment plug having a fixed grounding contact member.", + "displayTitle": "(B) Cord-and-Plug Connections", + "children": [], + "url": "https://2023.antflix.net#680.7_(B)" + }, + { + "body": "Terminals used for bonding and equipment grounding shall be identified for use in wet locations. Field-installed terminals in damp or wet locations or corrosive environments shall be composed of copper, copper alloy, or stainless steel and shall be listed for direct burial use.", + "displayTitle": "(C) Terminals", + "children": [], + "url": "https://2023.antflix.net#680.7_(C)" + } + ], + "url": "https://2023.antflix.net#680.7" + }, + { + "body": "Fixed or stationary equipment, other than underwater luminaires, for a permanently installed pool shall be permitted to be connected with a flexible cord and plug to facilitate the removal or disconnection for maintenance or repair.", + "displayTitle": "680.8 Cord-and-Plug-Connected Equipment", + "children": [ + { + "body": "For other than storable pools, the flexible cord shall not exceed 900 mm (3 ft) in length.", + "displayTitle": "(A) Length", + "children": [], + "url": "https://2023.antflix.net#680.8_(A)" + }, + { + "body": "The flexible cord shall have a copper equipment grounding conductor sized in accordance with 250.122 but not smaller than 12 AWG. The cord shall terminate in a grounding-type attachment plug.", + "displayTitle": "(B) Equipment Grounding", + "children": [], + "url": "https://2023.antflix.net#680.8_(B)" + }, + { + "body": "The equipment grounding conductors shall be connected to a fixed metal part of the assembly. The removable part shall be mounted on or bonded to the fixed metal part.", + "displayTitle": "(C) Construction", + "children": [], + "url": "https://2023.antflix.net#680.8_(C)" + } + ], + "url": "https://2023.antflix.net#680.8" + }, + { + "body": "Overhead conductors shall meet the clearance requirements in this section. Where a minimum clearance from the water level is given, the measurement shall be taken from the maximum water level of the specified body of water.", + "displayTitle": "680.9 Overhead Conductor Clearances", + "children": [ + { + "body": "Overhead conductors and open overhead wiring not in a raceway shall comply with the minimum clearances given in Table 680.9(A) and illustrated in Figure 680.9(A).", + "displayTitle": "(A) Power", + "children": [], + "url": "https://2023.antflix.net#680.9_(A)" + }, + { + "body": "Communications, radio, and television coaxial cables within the scope of Chapter 8 shall be permitted at a height of not less than 3.0 m (10 ft) above the maximum water level of swimming and wading pools, and diving structures, observation stands, towers, or platforms.", + "displayTitle": "(B) Communications Systems", + "children": [], + "url": "https://2023.antflix.net#680.9_(B)" + }, + { + "body": "The minimum clearances for overhead network-powered broadband communications systems conductors from pools or fountains shall comply with the provisions in Table 680.9(A) for conductors operating at 0 to 750 volts to ground. FIGURE 680.9(A) Clearances from Pool Structures. Table 680.9(A) Overhead Conductor Clearances Clearance Parameters Insulated Cables, 0\u2014750 Volts to Ground, Supported on and Cabled Together with a Solidly Grounded Bare Messenger or Solidly Grounded Neutral Conductor All Other Conductors Voltage to Ground 0 through 15 kV Over 15 through 50 kV m ft m ft m ft A. Clearance in any direction to the water level, edge of water surface, base of diving platform, or permanently anchored raft 6.9 22.5 7.5 25 8.0 27 B. Clearance in any direction to the observation stand, tower, or diving platform 4.4 14.5 5.2 17 5.5 18 C. Horizontal limit of clearance measured from inside wall of the pool This limit shall extend to the outer edge of the structures listed in A and B of this table but not less than 3 m (10 ft). ", + "displayTitle": "(C) Network-Powered Broadband Communications Systems", + "children": [], + "url": "https://2023.antflix.net#680.9_(C)" + } + ], + "url": "https://2023.antflix.net#680.9" + }, + { + "displayTitle": "680.10 Electric Pool Water Heaters Incorporating Resistive Heating Elements and Electrically Powered Swimming Pool Heat Pumps and Chillers", + "children": [ + { + "body": "All electric pool water heaters incorporating resistive heating elements shall have the heating elements subdivided into loads not exceeding 48 amperes and protected at not over 60 amperes. The ampacity of the branch-circuit conductors and the rating or setting of overcurrent protective devices shall be 125 percent of the total nameplate-rated load or greater.", + "displayTitle": "(A) Electric Pool Water Heaters", + "children": [], + "url": "https://2023.antflix.net#680.10_(A)" + }, + { + "body": "Electrically powered swimming pool heat pumps and chillers using the circulating water system and providing heating, cooling, or both, shall be listed and rated for their intended use. The ampacity of the branch-circuit conductors and the rating or setting of overcurrent protective devices shall be sized to comply with the nameplate.", + "displayTitle": "(B) Electrically Powered Swimming Pool Heat Pumps and Chillers", + "children": [], + "url": "https://2023.antflix.net#680.10_(B)" + } + ], + "url": "https://2023.antflix.net#680.10" + }, + { + "body": "Underground wiring shall comply with 680.11(A) and (B).", + "displayTitle": "680.11 Underground Wiring", + "children": [ + { + "body": "Underground wiring within 1.5 m (5 ft) horizontally from the inside wall of the pool shall be permitted. The following wiring methods shall be considered suitable for the conditions in these locations provided they are installed complete between outlets, junctions, or splicing points: Rigid metal conduitIntermediate metal conduitRigid polyvinyl chloride conduitReinforced thermosetting resin conduitJacketed Type MC cable that is listed for burial useLiquidtight flexible nonmetallic conduit listed for direct burial useLiquidtight flexible metal conduit listed for direct burial use", + "displayTitle": "(A) Underground Wiring", + "children": [], + "url": "https://2023.antflix.net#680.11_(A)" + }, + { + "body": "Underground wiring shall not be permitted under the pool unless this wiring is necessary to supply pool equipment permitted by this article.", + "displayTitle": "(B) Wiring Under Pools", + "children": [], + "url": "https://2023.antflix.net#680.11_(B)" + } + ], + "url": "https://2023.antflix.net#680.11" + }, + { + "displayTitle": "680.12 Equipment Rooms, Vaults, and Pits", + "children": [ + { + "body": "Electrical equipment shall not be installed in rooms, vaults, or pits that do not have drainage that prevents water accumulation during normal operation or maintenance unless the equipment is rated and identified for submersion. Informational Note: Chemicals such as chlorine cause severe corrosive and deteriorating effects on electrical connections, equipment, and enclosures when stored and kept in the same vicinity. Adequate ventilation of indoor spaces such as equipment and storage rooms is addressed by ANSI/APSP-11, Standard for Water Quality in Public Pools and Spas, and can reduce the likelihood of the accumulation of corrosive vapors.", + "displayTitle": "(A) Drainage", + "children": [], + "url": "https://2023.antflix.net#680.12_(A)" + }, + { + "body": "At least one GFCI-protected 125-volt, 15- or 20-ampere receptacle supplied from a general purpose branch circuit shall be located within an equipment room. All other receptacles supplied by branch circuits rated 150 volts or less to ground within an equipment room and any receptacles supplied by a branch circuit rated 150 volts or less to ground in a vault or pit shall be GFCI protected.", + "displayTitle": "(B) Receptacles", + "children": [], + "url": "https://2023.antflix.net#680.12_(B)" + } + ], + "url": "https://2023.antflix.net#680.12" + }, + { + "body": "One or more means to simultaneously disconnect all ungrounded conductors shall be provided for all utilization equipment other than lighting. Each means shall be readily accessible and within sight from its equipment and shall be located not less than 1.5 m (5 ft) horizontally from the inside walls of a pool, spa, fountain, or hot tub unless separated from the open water by a permanently installed barrier that provides a 1.5 m (5 ft) reach path or greater. This horizontal distance shall be measured from the water's edge along the shortest path required to reach the disconnect.", + "displayTitle": "680.13 Maintenance Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#680.13" + }, + { + "displayTitle": "680.14 Corrosive Environments", + "children": [ + { + "body": "Wiring methods shall be suitable for use in corrosive environments. Rigid metal conduit, intermediate metal conduit, rigid polyvinyl chloride conduit, reinforced thermosetting resin conduit, and liquidtight flexible nonmetallic conduit shall be considered suitable for use. Aluminum conduit and tubing shall not be permitted.", + "displayTitle": "(A) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#680.14_(A)" + }, + { + "body": "Other equipment shall be suitable for use in corrosive environments or be installed in identified corrosion-resistant enclosures. Equipment listed for pool and spa use shall be considered suitable for use.", + "displayTitle": "(B) Other Equipment", + "children": [], + "url": "https://2023.antflix.net#680.14_(B)" + } + ], + "url": "https://2023.antflix.net#680.14" + }, + { + "displayTitle": "Part II Permanently Installed Pools", + "children": [], + "url": "https://2023.antflix.net#divider_101_II" + }, + { + "body": "Electrical installations at permanently installed pools shall comply with the provisions of Part I and Part II of this article.", + "displayTitle": "680.20 General", + "children": [], + "url": "https://2023.antflix.net#680.20" + }, + { + "displayTitle": "680.21 Motors", + "children": [ + { + "body": "The wiring to a pool motor shall comply with 680.21(A)(1) or (A)(2).", + "displayTitle": "(A) Wiring Methods", + "children": [ + { + "body": "Where necessary to employ flexible connections at or adjacent to the motor, liquidtight flexible metal, liquidtight flexible nonmetallic conduit, or MC cable suitable for the use shall be permitted.", + "displayTitle": "(1) Flexible Connections", + "children": [], + "url": "https://2023.antflix.net#680.21_(A)_(1)" + }, + { + "body": "Pool-associated motors shall be permitted to employ cord-and-plug connections. The flexible cord shall not exceed 900 mm (3 ft) in length.", + "displayTitle": "(2) Cord-and-Plug Connections", + "children": [], + "url": "https://2023.antflix.net#680.21_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#680.21_(A)" + }, + { + "body": "A listed cord-and-plug-connected pool pump incorporating an approved system of double insulation that provides a means for grounding only the internal and nonaccessible, non-current-carrying metal parts of the pump shall be connected to any wiring method recognized in Chapter 3 that is suitable for the location. Where the equipment grounding conductor of the motor circuit is connected to the equipotential bonding means in accordance with the second sentence of 680.26(B)(6)(a), the branch-circuit wiring shall comply with 680.21 (A).", + "displayTitle": "(B) Double-Insulated Pool Pumps", + "children": [], + "url": "https://2023.antflix.net#680.21_(B)" + }, + { + "body": "Outlets serving pool motors shall have ground-fault protection complying with 680.5(B) or (C), as applicable. Exception: Listed low-voltage motors not requiring grounding, with ratings not exceeding the low-voltage contact limit that are supplied by listed transformers or power supplies that comply with 680.23(A)(2), shall be permitted to be installed without ground-fault protection.", + "displayTitle": "(C) Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#680.21_(C)" + }, + { + "body": "Where a pool pump motor in 680.21 (C) is replaced or repaired, the replacement or repaired pump motor shall be provided with ground-fault protection complying with 680.5(B) or (C), as applicable.", + "displayTitle": "(D) Pool Pump Motor Replacement", + "children": [], + "url": "https://2023.antflix.net#680.21_(D)" + } + ], + "url": "https://2023.antflix.net#680.21" + }, + { + "displayTitle": "680.22 Lighting, Receptacles, and Equipment", + "children": [ + { + "displayTitle": "(A) Receptacles", + "children": [ + { + "body": "Where a permanently installed pool is installed, no fewer than one 125-volt, 15- or 20-ampere receptacle on a general-purpose branch circuit shall be located not less than 1.83 m (6 ft) from, and not more than 6.0 m (20 ft) from, the inside wall of the pool. This receptacle shall be located not more than 2.0 m (6 ft 6 in.) above the floor, platform, or grade level serving the pool.", + "displayTitle": "(1) Required Receptacle, Location", + "children": [], + "url": "https://2023.antflix.net#680.22_(A)_(1)" + }, + { + "body": "Receptacles that provide power for water-pump motors or for other loads directly related to the circulation and sanitation system shall be located at least 1.83 m (6 ft) from the inside walls of the pool. These receptacles shall have GFCI protection and be of the grounding type.", + "displayTitle": "(2) Circulation and Sanitation System, Location", + "children": [], + "url": "https://2023.antflix.net#680.22_(A)_(2)" + }, + { + "body": "Other receptacles shall be not less than 1.83 m (6 ft) from the inside walls of a pool.", + "displayTitle": "(3) Other Receptacles, Location", + "children": [], + "url": "https://2023.antflix.net#680.22_(A)_(3)" + }, + { + "body": "All receptacles rated 125 volts through 250 volts, 60 amperes or less, located within 6.0 m (20 ft) of the inside walls of a pool shall have GFCI protection complying with 680.5(B) or SPGFCI protection complying with 680.5(C), as applicable.", + "displayTitle": "(4) Ground-Fault Circuit-Interrupter (GFCI) and Special Purpose Ground-Fault Circuit-Interrupter (SPGFCI) Protection", + "children": [], + "url": "https://2023.antflix.net#680.22_(A)_(4)" + }, + { + "body": "In determining the dimensions in this section addressing receptacle spacings, the distance to be measured shall be the shortest path the supply cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, doorway with hinged or sliding door, window opening, or other effective permanent barrier.", + "displayTitle": "(5) Measurements", + "children": [], + "url": "https://2023.antflix.net#680.22_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#680.22_(A)" + }, + { + "displayTitle": "(B) Luminaires, Lighting Outlets, and Ceiling-Suspended (Paddle) Fans", + "children": [ + { + "body": "In outdoor pool areas, luminaires, lighting outlets, and ceiling-suspended (paddle) fans installed above the pool or the area extending 1.5 m (5 ft) horizontally from the inside walls of the pool shall be installed at a height not less than 3.7 m (12 ft) above the maximum water level of the pool.", + "displayTitle": "(1) New Outdoor Installation Clearances", + "children": [], + "url": "https://2023.antflix.net#680.22_(B)_(1)" + }, + { + "body": "For installations in indoor pool areas, the clearances shall be the same as for outdoor areas unless modified as provided in this paragraph. If the branch circuit supplying the equipment is protected by a ground-fault circuit interrupter, the following equipment shall be permitted at a height not less than 2.3 m (7 ft 6 in.) above the maximum pool water level: Totally enclosed luminairesCeiling-suspended (paddle) fans identified for use beneath ceiling structures such as provided on porches or patios", + "displayTitle": "(2) Indoor Clearances", + "children": [], + "url": "https://2023.antflix.net#680.22_(B)_(2)" + }, + { + "body": "Existing luminaires and lighting outlets located less than 1.5 m (5 ft) measured horizontally from the inside walls of a pool shall be not less than 1.5 m (5 ft) above the surface of the maximum water level, shall be rigidly attached to the existing structure, and shall be protected by a ground-fault circuit interrupter.", + "displayTitle": "(3) Existing Installations", + "children": [], + "url": "https://2023.antflix.net#680.22_(B)_(3)" + }, + { + "body": "Luminaires, lighting outlets, and ceiling-suspended (paddle) fans installed in the area extending between 1.5 m (5 ft) and 3.0 m (10 ft) horizontally from the inside walls of a pool shall have GFCI protection complying with 680.5(B) or SPGFCI protection complying with 680.5(C), as applicable, unless installed not less than 1.5 m (5 ft) above the maximum water level and rigidly attached to the structure adjacent to or enclosing the pool.", + "displayTitle": "(4) Ground-Fault Circuit-Interrupter (GFCI) and Special Purpose Ground-Fault Circuit-Interrupter (SPGFCI) Protection in Adjacent Areas", + "children": [], + "url": "https://2023.antflix.net#680.22_(B)_(4)" + }, + { + "body": "Cord-and-plug-connected luminaires shall comply with the requirements of 680.8 where installed within 4.9 m (16 ft) of any point on the water surface, measured radially.", + "displayTitle": "(5) Cord-and-Plug-Connected Luminaires", + "children": [], + "url": "https://2023.antflix.net#680.22_(B)_(5)" + }, + { + "body": "Listed low-voltage luminaires not requiring grounding, not exceeding the low-voltage contact limit, and supplied by listed transformers or power supplies that comply with 680.23(A)(2) shall be permitted to be located less than 1.5 m (5 ft) from the inside walls of the pool.", + "displayTitle": "(6) Low-Voltage Luminaires", + "children": [], + "url": "https://2023.antflix.net#680.22_(B)_(6)" + }, + { + "body": "Listed low-voltage gas-fired-luminaires, decorative fireplaces, fire pits, and similar equipment using low-voltage ignitors that do not require grounding, and are supplied by listed transformers or power supplies that comply with 680.23(A)(2) with outputs that do not exceed the low-voltage contact limit shall be permitted to be located less than 1.5 m (5 ft) from the inside walls of the pool. Metallic equipment shall be bonded in accordance with the requirements in 680.26(B). Transformers or power supplies supplying this type of equipment shall be installed in accordance with the requirements in 680.24. Metallic gas piping shall be bonded in accordance with the requirements in 250.104(B) and 680.26(B)(7).", + "displayTitle": "(7) Low-Voltage Gas-Fired Luminaires, Decorative Fireplaces, Fire Pits, and Similar Equipment", + "children": [], + "url": "https://2023.antflix.net#680.22_(B)_(7)" + }, + { + "body": "In determining the dimensions in this section addressing luminaires, the distance to be measured shall be the shortest path an imaginary cord connected to the luminaire would follow without piercing a floor, wall, ceiling, doorway with hinged or sliding door, window opening, or other effective permanent barrier.", + "displayTitle": "(8) Measurements", + "children": [], + "url": "https://2023.antflix.net#680.22_(B)_(8)" + } + ], + "url": "https://2023.antflix.net#680.22_(B)" + }, + { + "body": "Switching devices shall be located at least 1.5 m (5 ft) horizontally from the inside walls of a pool unless separated from the pool by a solid fence, wall, or other permanent barrier that provides at least a 1.5 m (5 ft) reach distance. Alternatively, a switch that is listed as being acceptable for use within 1.5 m (5 ft) shall be permitted.", + "displayTitle": "(C) Switching Devices", + "children": [], + "url": "https://2023.antflix.net#680.22_(C)" + }, + { + "body": "Other outlets shall be not less than 3.0 m (10 ft) from the inside walls of the pool. Measurements shall be determined in accordance with 680.22(A)(5). Informational Note: Other outlets may include, but are not limited to, remote-control, signaling, fire alarm, and communications circuits.", + "displayTitle": "(D) Other Outlets", + "children": [], + "url": "https://2023.antflix.net#680.22_(D)" + }, + { + "body": "Other equipment with ratings exceeding the low-voltage contact limit shall be located at least 1.5 m (5 ft) horizontally from the inside walls of a pool unless separated from the pool by a solid fence, wall, or other permanent barrier.", + "displayTitle": "(E) Other Equipment", + "children": [], + "url": "https://2023.antflix.net#680.22_(E)" + } + ], + "url": "https://2023.antflix.net#680.22" + }, + { + "body": "This section covers all luminaires installed below the maximum water level of the pool.", + "displayTitle": "680.23 Underwater Luminaires", + "children": [ + { + "displayTitle": "(A) General", + "children": [ + { + "body": "The design of an underwater luminaire supplied from a branch circuit either directly or by way of a transformer or power supply meeting the requirements of this section shall be such that, where the luminaire is properly installed without a GFCI, there is no shock hazard with any likely combination of fault conditions during normal use (not relamping).", + "displayTitle": "(1) Luminaire Design, Normal Operation", + "children": [], + "url": "https://2023.antflix.net#680.23_(A)_(1)" + }, + { + "body": "Transformers and power supplies used for the supply of underwater luminaires, together with the transformer or power supply enclosure, shall be listed, labeled, and identified for swimming pool and spa use. The transformer or power supply shall incorporate either a transformer of the isolated winding type, with an ungrounded secondary that has a grounded metal barrier between the primary and secondary windings, or one that incorporates an approved system of double insulation between the primary and secondary windings.", + "displayTitle": "(2) Transformers and Power Supplies", + "children": [], + "url": "https://2023.antflix.net#680.23_(A)_(2)" + }, + { + "body": "GFCI protection shall be installed in the branch circuit supplying luminaires operating at voltages greater than the low-voltage contact limit.", + "displayTitle": "(3) GFCI Protection, Lamping, Relamping, and Servicing", + "children": [], + "url": "https://2023.antflix.net#680.23_(A)_(3)" + }, + { + "body": "No luminaires shall be installed for operation on supply circuits over 150 volts between conductors.", + "displayTitle": "(4) Voltage Limitation", + "children": [], + "url": "https://2023.antflix.net#680.23_(A)_(4)" + }, + { + "body": "Luminaires mounted in walls shall be installed with the top of the luminaire lens not less than 450 mm (18 in.) below the normal water level of the pool, unless the luminaire is listed and identified for use at lesser depths. No luminaire shall be installed less than 100 mm (4 in.) below the normal water level of the pool.", + "displayTitle": "(5) Location, Wall-Mounted Luminaires", + "children": [], + "url": "https://2023.antflix.net#680.23_(A)_(5)" + }, + { + "body": "A luminaire facing upward shall comply with either (1) or (2): Have the lens guarded to prevent contact by any personBe listed for use without a guard", + "displayTitle": "(6) Bottom-Mounted Luminaires", + "children": [], + "url": "https://2023.antflix.net#680.23_(A)_(6)" + }, + { + "body": "Luminaires that depend on submersion for safe operation shall be inherently protected against the hazards of overheating when not submerged.", + "displayTitle": "(7) Dependence on Submersion", + "children": [], + "url": "https://2023.antflix.net#680.23_(A)_(7)" + }, + { + "body": "Compliance with these requirements shall be obtained by the use of a listed underwater luminaire and by installation of a listed GFCI in the branch circuit or a listed transformer or power supply for luminaires operating at not more than the low-voltage contact limit.", + "displayTitle": "(8) Compliance", + "children": [], + "url": "https://2023.antflix.net#680.23_(A)_(8)" + } + ], + "url": "https://2023.antflix.net#680.23_(A)" + }, + { + "displayTitle": "(B) Wet-Niche Luminaires", + "children": [ + { + "body": "Forming shells shall be installed for the mounting of all wet-niche underwater luminaires and shall be equipped with provisions for conduit entries. Metal parts of the luminaire and forming shell in contact with the pool water shall be of brass or other approved corrosion-resistant metal. All forming shells used with nonmetallic conduit systems, other than those that are part of a listed low-voltage lighting system not requiring grounding, shall include provisions for terminating an 8 AWG copper conductor.", + "displayTitle": "(1) Forming Shells", + "children": [], + "url": "https://2023.antflix.net#680.23_(B)_(1)" + }, + { + "body": "Conduit shall be installed from the forming shell to a junction box or other enclosure conforming to the requirements in 680.24. Conduit shall be rigid metal, intermediate metal, liquidtight flexible nonmetallic, or rigid polyvinyl chloride conduit. Metal Conduit. Metal conduit shall be listed and shall be red brass or stainless steel.Informational Note: See UL 6A, Electrical Rigid Metal Conduit - Aluminum, Red Brass, and Stainless Steel, for information on the listing criteria for red brass and stainless steel conduit.Nonmetallic Conduit. Where a nonmetallic conduit is used, an 8 AWG insulated solid or stranded copper bonding jumper shall be installed in this conduit unless a listed low-voltage lighting system not requiring grounding is used. The bonding jumper shall be terminated in the forming shell, junction box or transformer enclosure, or ground-fault circuit-interrupter enclosure. The termination of the 8 AWG bonding jumper in the forming shell shall be covered with, or encapsulated in, a listed potting compound to protect the connection from the possible deteriorating effect of pool water.", + "displayTitle": "(2) Wiring Extending Directly to the Forming Shell", + "children": [], + "url": "https://2023.antflix.net#680.23_(B)_(2)" + }, + { + "body": "Other than listed low-voltage lighting systems not requiring grounding, wet-niche luminaires that are supplied by a flexible cord or cable shall have all exposed non-current-carrying metal parts connected to an insulated copper equipment grounding conductor that is an integral part of the cord or cable. This equipment grounding conductor shall be connected to a grounding terminal in the supply junction box, transformer enclosure, or other enclosure. The equipment grounding conductor shall not be smaller than the supply conductors and not smaller than 16 AWG.", + "displayTitle": "(3) Equipment Grounding Provisions for Cords", + "children": [], + "url": "https://2023.antflix.net#680.23_(B)_(3)" + }, + { + "body": "The end of the flexible-cord jacket and the flexible-cord conductor terminations within a luminaire shall be covered with, or encapsulated in, a suitable potting compound to prevent the entry of water into the luminaire through the cord or its conductors. If present, the connection of the equipment grounding conductor within a luminaire shall be similarly treated to protect such connection from the deteriorating effect of pool water in the event of water entry into the luminaire.", + "displayTitle": "(4) Luminaire Grounding Terminations", + "children": [], + "url": "https://2023.antflix.net#680.23_(B)_(4)" + }, + { + "body": "The luminaire shall be bonded to, and secured to, the forming shell by a positive locking device that ensures a low-resistance contact and requires a tool to remove the luminaire from the forming shell. Bonding shall not be required for luminaires that are listed for the application and have no non-current-carrying metal parts.", + "displayTitle": "(5) Luminaire Bonding", + "children": [], + "url": "https://2023.antflix.net#680.23_(B)_(5)" + }, + { + "body": "Wet-niche luminaires shall be removable from the water for inspection, relamping, or other maintenance. The forming shell location and length of cord in the forming shell shall permit personnel to place the removed luminaire on the deck or other dry location for such maintenance. The luminaire maintenance location shall be accessible without entering or going in the pool water. In spa locations where wet-niche luminaires are installed low in the foot well of the spa, the luminaire shall only be required to reach the bench location, where the spa can be drained to make the bench location dry.", + "displayTitle": "(6) Servicing", + "children": [], + "url": "https://2023.antflix.net#680.23_(B)_(6)" + } + ], + "url": "https://2023.antflix.net#680.23_(B)" + }, + { + "displayTitle": "(C) Dry-Niche Luminaires", + "children": [ + { + "body": "A dry-niche luminaire shall have provision for drainage of water. Other than listed low-voltage luminaires not requiring grounding, a dry-niche luminaire shall have means for accommodating one equipment grounding conductor for each conduit entry.", + "displayTitle": "(1) Construction", + "children": [], + "url": "https://2023.antflix.net#680.23_(C)_(1)" + }, + { + "body": "A junction box shall not be required but, if used, shall not be required to be elevated or located as specified in 680.24(A)(2) if the luminaire is specifically identified for the purpose.", + "displayTitle": "(2) Junction Box", + "children": [], + "url": "https://2023.antflix.net#680.23_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#680.23_(C)" + }, + { + "body": "A no-niche luminaire shall meet the construction requirements of 680.23(B)(3) and be installed in accordance with t 680.23(B). Where connection to a forming shell is specified, the connection shall be to the mounting bracket.", + "displayTitle": "(D) No-Niche Luminaires", + "children": [], + "url": "https://2023.antflix.net#680.23_(D)" + }, + { + "body": "A through-wall lighting assembly shall be equipped with a threaded entry or hub, or a nonmetallic hub, for the purpose of accommodating the termination of the supply conduit. A through-wall lighting assembly shall meet the construction requirements of 680.23(B)(3) and be installed in accordance with 680.23. Where connection to a forming shell is specified, the connection shall be to the conduit termination point.", + "displayTitle": "(E) Through-Wall Lighting Assembly", + "children": [], + "url": "https://2023.antflix.net#680.23_(E)" + }, + { + "displayTitle": "(F) Branch-Circuit Wiring", + "children": [ + { + "body": "Where branch-circuit wiring, on the supply side of enclosures and junction boxes connected to conduits run to underwater luminaires, is installed in corrosive environments, the wiring method of that portion of the branch circuit shall be in accordance with 680.14. Exception: Where connecting to transformers or power supplies for pool lights, liquidtight flexible metal conduit shall be permitted. The length shall not exceed 1.8 m (6 ft) for any one length or exceed 3.0 m (10 ft) in total length used.", + "displayTitle": "(1) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#680.23_(F)_(1)" + }, + { + "body": "Other than listed low-voltage luminaires not requiring grounding, all through-wall lighting assemblies, wet-niche, dry-niche, or no-niche luminaires shall be connected to an insulated copper equipment grounding conductor installed with the circuit conductors. The equipment grounding conductor shall be installed without joint or splice except as permitted in 680.23(F)(2)(a) and (F)(2)(b). The equipment grounding conductor shall be sized in accordance with 250.122 but shall not be smaller than 12 AWG. Exception: An equipment grounding conductor between the wiring chamber of the secondary winding of a transformer and a junction box shall be sized in accordance with the transformer secondary overcurrent protection provided.If more than one underwater luminaire is supplied by the same branch circuit, the equipment grounding conductor, installed between the junction boxes, transformer enclosures, or other enclosures in the supply circuit to wet-niche luminaires, or between the field-wiring compartments of dry-niche luminaires, shall be permitted to be terminated on grounding terminals.If the underwater luminaire is supplied from a transformer, ground-fault circuit interrupter, clock-operated switch, or a manual snap switch that is located between the panelboard and a junction box connected to the conduit that extends directly to the underwater luminaire, the equipment grounding conductor shall be permitted to terminate on grounding terminals on the transformer, ground-fault circuit interrupter, clock-operated switch enclosure, or an outlet box used to enclose a snap switch.", + "displayTitle": "(2) Equipment Grounding", + "children": [], + "url": "https://2023.antflix.net#680.23_(F)_(2)" + }, + { + "body": "Conductors on the load side of a GFCI or of a transformer, used to comply with the provisions of 680.23(A)(8), shall not occupy raceways, boxes, or enclosures containing other conductors unless one of the following conditions applies: The other conductors are GFCI protected.The other conductors are equipment grounding conductors and bonding jumpers as required per 680.23(B)(2)(b).The other conductors are supply conductors to a feed-through-type GFCI.GFCIs shall be permitted in a panelboard that contains circuits protected by other than ground-fault circuit interrupters.", + "displayTitle": "(3) Conductors", + "children": [], + "url": "https://2023.antflix.net#680.23_(F)_(3)" + } + ], + "url": "https://2023.antflix.net#680.23_(F)" + } + ], + "url": "https://2023.antflix.net#680.23" + }, + { + "displayTitle": "680.24 Junction Boxes and Electrical Enclosures for Transformers or Ground-Fault Circuit Interrupters", + "children": [ + { + "body": "A junction box connected to a conduit that extends directly to a forming shell or mounting bracket of a no-niche luminaire shall meet the requirements of this section.", + "displayTitle": "(A) Junction Boxes", + "children": [ + { + "body": "The junction box shall be listed, labeled, and identified as a swimming pool junction box and shall comply with the following conditions: Be equipped with threaded entries or hubs or a nonmetallic hubBe comprised of copper, brass, suitable plastic, or other approved corrosion-resistant materialBe provided with electrical continuity between every connected metal conduit and the grounding terminals by means of copper, brass, or other approved corrosion-resistant metal that is integral with the box", + "displayTitle": "(1) Construction", + "children": [], + "url": "https://2023.antflix.net#680.24_(A)_(1)" + }, + { + "body": "Where the luminaire operates over the low-voltage contact limit, the junction box location shall comply with 680.24(A)(2)(a) and (A)(2)(b). Where the luminaire operates at the low-voltage contact limit or less, the junction box location shall be permitted to comply with 680.24(A)(2)(c). Vertical Spacing. The junction box shall be located not less than 100 mm (4 in.), measured from the inside of the bottom of the box, above the ground level, or pool deck, or not less than 200 mm (8 in.) above the maximum pool water level, whichever provides the greater elevation.Horizontal Spacing. The junction box shall be located not less than 1.2 m (4 ft) from the inside wall of the pool, unless separated from the pool by a solid fence, wall, or other permanent barrier.Flush Deck Box. If used on a lighting system operating at the low-voltage contact limit or less, a flush deck box shall be permitted if both of the following conditions are met:Potting compound is used to fill the box to prevent the entrance of moisture.The flush deck box is located not less than 1.2 m (4 ft) from the inside wall of the pool.", + "displayTitle": "(2) Installation", + "children": [], + "url": "https://2023.antflix.net#680.24_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#680.24_(A)" + }, + { + "body": "An enclosure for a transformer, ground-fault circuit interrupter, or a similar device connected to a conduit that extends directly to a forming shell or mounting bracket of a no-niche luminaire shall meet the requirements of this section.", + "displayTitle": "(B) Other Enclosures", + "children": [ + { + "body": "The enclosure shall be listed and labeled for the purpose and meet the following requirements: Equipped with threaded entries or hubs or a nonmetallic hubComprised of copper, brass, suitable plastic, or other approved corrosion-resistant materialProvided with sealing compound identified for use with cable insulation, conductor insulation, bare conductor, shield, or other components, sat the conduit connection, that prevents circulation of air between the conduit and the enclosuresProvided with electrical continuity between every connected metal conduit and the grounding terminals by means of copper, brass, or other approved corrosion-resistant metal that is integral with the box", + "displayTitle": "(1) Construction", + "children": [], + "url": "https://2023.antflix.net#680.24_(B)_(1)" + }, + { + "body": "Vertical Spacing. The enclosure shall be located not less than 100 mm (4 in.), measured from the inside of the bottom of the box, above the ground level, or pool deck, or not less than 200 mm (8 in.) above the maximum pool water level, whichever provides the greater elevation.Horizontal Spacing. The enclosure shall be located not less than 1.2 m (4 ft) from the inside wall of the pool, unless separated from the pool by a solid fence, wall, or other permanent barrier.", + "displayTitle": "(2) Installation", + "children": [], + "url": "https://2023.antflix.net#680.24_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#680.24_(B)" + }, + { + "body": "Junction boxes and enclosures mounted above the grade of the finished walkway around the pool shall not be located in the walkway unless afforded additional protection, such as by location under diving boards, adjacent to fixed structures, and the like.", + "displayTitle": "(C) Protection", + "children": [], + "url": "https://2023.antflix.net#680.24_(C)" + }, + { + "body": "Junction boxes, transformer and power-supply enclosures, and ground-fault circuit-interrupter enclosures connected to a conduit that extends directly to a forming shell or mounting bracket of a no-niche luminaire shall be provided with a number of grounding terminals that shall be no fewer than one more than the number of conduit entries.", + "displayTitle": "(D) Grounding Terminals", + "children": [], + "url": "https://2023.antflix.net#680.24_(D)" + }, + { + "body": "The termination of a flexible cord of an underwater luminaire within a junction box, transformer or power-supply enclosure, ground-fault circuit interrupter, or other enclosure shall be provided with a strain relief.", + "displayTitle": "(E) Strain Relief", + "children": [], + "url": "https://2023.antflix.net#680.24_(E)" + }, + { + "body": "The grounding terminals of a junction box, transformer enclosure, or other enclosure in the supply circuit to a wet-niche or no-niche luminaire and the field-wiring chamber of a dry-niche luminaire shall be connected to the equipment grounding terminal of the panelboard. This terminal shall be directly connected to the panelboard enclosure.", + "displayTitle": "(F) Grounding", + "children": [], + "url": "https://2023.antflix.net#680.24_(F)" + } + ], + "url": "https://2023.antflix.net#680.24" + }, + { + "displayTitle": "680.26 Equipotential Bonding", + "children": [ + { + "body": "The equipotential bonding required by 680.26(B) and (C) to reduce voltage gradients in the pool area shall be installed for pools with or without associated electrical equipment related to the pool.", + "displayTitle": "(A) Performance", + "children": [], + "url": "https://2023.antflix.net#680.26_(A)" + }, + { + "body": "The parts specified in 680.26(B)(1) through (B)(7) shall be bonded together using solid copper conductors, insulated, covered, or bare, not smaller than 8 AWG or with rigid metal conduit of brass or other identified corrosion-resistant metal. Connections to bonded parts shall be made in accordance with 250.8. An 8 AWG or larger solid copper bonding conductor provided to reduce voltage gradients in the pool area shall not be required to be extended or attached to remote panelboards, service equipment, or electrodes.", + "displayTitle": "(B) Bonded Parts", + "children": [ + { + "body": "Bonding to conductive pool shells shall be provided as specified in 680.26(B)(1)(a) or (B)(1)(b). Cast-in-place concrete, pneumatically applied or sprayed concrete, and concrete block with painted or plastered coatings shall all be considered conductive materials due to water permeability and porosity. Reconstructed pool shells shall also meet the requirements of this section. Vinyl liners and fiberglass composite shells shall be considered to be nonconductive materials and not subject to these requirements. Structural Reinforcing Steel. Unencapsulated structural reinforcing steel shall be bonded together by steel tie wires or the equivalent. Where structural reinforcing steel is encapsulated in a nonconductive compound, a copper conductor grid shall be installed in accordance with 680.26(B)(1)(b).Copper Conductor Grid. A copper conductor grid shall be provided and shall comply with the following:Be constructed of minimum 8 AWG bare solid copper conductors bonded to each other at all points of crossing in accordance with 250.8 or other approved meansConform to the contour of the poolBe arranged in a 300 mm (12 in.) by 300 mm (12 in.) network of conductors in a uniformly spaced perpendicular grid pattern with a tolerance of 100 mm (4 in.)Be secured within or under the pool no more than 150 mm (6 in.) from the outer contour of the pool shell", + "displayTitle": "(1) Conductive Pool Shells", + "children": [], + "url": "https://2023.antflix.net#680.26_(B)_(1)" + }, + { + "body": "The perimeter surface to be bonded shall be considered to extend for 1 m (3 ft) horizontally beyond the inside walls of the pool and shall include unpaved surfaces and other types of paving. Perimeter surfaces separated from the pool by a permanent wall or building 1.5 m (5 ft) in height or more shall require equipotential bonding only on the pool side of the permanent wall or building. Bonding to perimeter surfaces shall be provided as specified in 680.26(B)(2)(a), (B)(2)(b), or (B)(2)(c) and shall be attached to the pool reinforcing steel or copper conductor grid at a minimum of four points uniformly spaced around the perimeter of the pool. For nonconductive pool shells, bonding at four points shall not be required. Structural Reinforcing Steel. Structural reinforcing steel shall be bonded in accordance with 680.26(B)(1)(a).Copper Ring. Where structural reinforcing steel is not available or is encapsulated in a nonconductive compound, a copper conductor(s) shall be utilized where the following requirements are met:At least one minimum 8 AWG bare solid copper conductor shall be provided.The conductors shall follow the contour of the perimeter surface.Only listed splicing devices or exothermic welding shall be permitted.The required conductor shall be 450 mm to 600 mm (18 in. to 24 in.) from the inside walls of the pool.The required conductor shall be secured within or under the perimeter surface 100 mm to 150 mm (4 in. to 6 in.) below the subgrade.Copper Grid. Where structural reinforcing steel is not available or is encapsulated in a nonconductive compound, copper grid shall be utilized where the following requirements are met:The copper grid shall be constructed of 8 AWG solid bare copper and be arranged in accordance with 680.26(B)(1)(b)(3).The copper grid shall follow the contour of the perimeter surface extending 1 m (3 ft) horizontally beyond the inside walls of the pool.Only listed splicing devices or exothermic welding shall be permitted.The copper grid shall be secured within or under the deck or unpaved surfaces between 100 mm to 150 mm (4 in. to 6 in.) below the subgrade.", + "displayTitle": "(2) Perimeter Surfaces", + "children": [], + "url": "https://2023.antflix.net#680.26_(B)_(2)" + }, + { + "body": "All metallic parts of the pool structure, including reinforcing metal not addressed in 680.26(B)(l)(a), shall be bonded. Where reinforcing steel is encapsulated with a nonconductive compound, the reinforcing steel shall not be required to be bonded.", + "displayTitle": "(3) Metallic Components", + "children": [], + "url": "https://2023.antflix.net#680.26_(B)_(3)" + }, + { + "body": "All metal forming shells and mounting brackets of no-niche luminaires shall be bonded. Exception: Listed low-voltage lighting systems with nonmetallic forming shells shall not require bonding.", + "displayTitle": "(4) Underwater Lighting", + "children": [], + "url": "https://2023.antflix.net#680.26_(B)_(4)" + }, + { + "body": "All metal fittings within or attached to the pool structure shall be bonded. Exception: The following shall not be required to be bonded: (1) Isolated parts that are not over 100 mm (4 in.) in any dimension and do not penetrate into the pool structure more than 25 mm (1 in.) (2) Metallic pool cover anchors intended for insertion in a concrete or masonry deck surface, 25 mm (1 in.) or less in any dimension and 51 mm (2 in.) or less in length (3) Metallic pool cover anchors intended for insertion in a wood or composite deck surface, 51 mm (2 in.) or less in any flange dimension and 51 mm (2 in.) or less in length", + "displayTitle": "(5) Metal Fittings", + "children": [], + "url": "https://2023.antflix.net#680.26_(B)_(5)" + }, + { + "body": "Metal parts of the following electrical equipment shall be bonded: Electrically powered pool cover(s)Pool water circulation, treatment, heating, cooling, or dehumidification equipmentUnless separated from the pool by a permanent barrier that prevents contact by a person, any other electrical equipment within 1.5 m (5 ft) measured horizontally from the inside wall of the pool, or 3.7 m (12 ft) measured vertically above the maximum water level of the pool, or as measured vertically above any observation stands, towers, or platforms, or any diving structuresException: Metal parts of listed equipment incorporating an approved system of double insulation shall not be bonded.Double-Insulated Water Pump Motors. Where a double-insulated water pump motor is installed under the provisions of this rule, a solid 8 AWG copper conductor of sufficient length to make a bonding connection to a replacement motor shall be extended from the swimming pool equipotential bonding means to an accessible point in the vicinity of the pool pump motor. Where there is no connection between the swimming pool equipotential bonding means and the equipment grounding system for the premises, this bonding conductor shall be connected to the equipment grounding conductor of the motor circuit.Pool Water Heaters. For pool water heaters rated at more than 50 amperes and having specific instructions regarding bonding and grounding, only those parts designated to be bonded shall be bonded and only those parts designated to be grounded shall be grounded.", + "displayTitle": "(6) Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#680.26_(B)_(6)" + }, + { + "body": "All fixed metal parts, including, but not limited to, metal-sheathed cables and raceways, metal piping, metal awnings, metal fences, and metal door and window frames, shall be bonded where located no greater than either of the following: 1.5 m (5 ft) horizontally from the inside walls of the pool3.7 m (12 ft) vertically above the maximum water level of the pool, observation stands, towers, or platforms, or any diving structuresException: Those separated from the pool by a permanent barrier that prevents contact, by a person shall not be required to be bonded.", + "displayTitle": "(7) Fixed Metal Parts", + "children": [], + "url": "https://2023.antflix.net#680.26_(B)_(7)" + } + ], + "url": "https://2023.antflix.net#680.26_(B)" + }, + { + "body": "Where none of the bonded parts as specified in 680.26(B)(1) through (B)(7) are in direct connection with the pool water, the pool water shall be in direct contact with an approved corrosion-resistant conductive surface that exposes not less than 5800 mm2 (9 in.2) of surface area to the pool water at all times. The conductive surface shall be located where it is not exposed to physical damage or dislodgement during usual pool activities, and it shall be bonded in accordance with 680.26(B).", + "displayTitle": "(C) Pool Water", + "children": [], + "url": "https://2023.antflix.net#680.26_(C)" + } + ], + "url": "https://2023.antflix.net#680.26" + }, + { + "displayTitle": "680.27 Specialized Pool Equipment", + "children": [ + { + "body": "All underwater audio equipment shall be identified as underwater audio equipment.", + "displayTitle": "(A) Underwater Audio Equipment", + "children": [ + { + "body": "Each speaker shall be mounted in an approved metal forming shell, the front of which is enclosed by a captive metal screen, or equivalent, that is bonded to, and secured to, the forming shell by a positive locking device that ensures a low-resistance contact and requires a tool to open for installation or servicing of the speaker. The forming shell shall be installed in a recess in the wall or floor of the pool.", + "displayTitle": "(1) Speakers", + "children": [], + "url": "https://2023.antflix.net#680.27_(A)_(1)" + }, + { + "body": "Rigid metal conduit of brass or other identified corrosion-resistant metal, liquidtight flexible nonmetallic conduit (LFNC), rigid polyvinyl chloride conduit, or reinforced thermosetting resin conduit shall extend from the forming shell to a listed junction box or other enclosure as provided in 680.24. Where rigid polyvinyl chloride conduit, reinforced thermosetting resin conduit, or liquidtight flexible nonmetallic conduit is used, an 8 AWG insulated solid or stranded copper bonding jumper shall be installed in this conduit. The bonding jumper shall be terminated in the forming shell and the junction box. The termination of the 8 AWG bonding jumper in the forming shell shall be covered with, or encapsulated in, a listed potting compound to protect such connection from the possible deteriorating effect of pool water.", + "displayTitle": "(2) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#680.27_(A)_(2)" + }, + { + "body": "The forming shell and metal screen shall be of brass or other approved corrosion-resistant metal. All forming shells shall include provisions for terminating an 8 AWG copper conductor.", + "displayTitle": "(3) Forming Shell and Metal Screen", + "children": [], + "url": "https://2023.antflix.net#680.27_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#680.27_(A)" + }, + { + "displayTitle": "(B) Electrically Operated Pool Covers", + "children": [ + { + "body": "The electric motors, controllers, and wiring shall be located not less than 1.5 m (5 ft) from the inside wall of the pool unless separated from the pool by a wall, cover, or other permanent barrier. Electric motors installed below grade level shall be of the totally enclosed type. The device that controls the operation of the motor for an electrically operated pool cover shall be located such that the device operator has full view of the pool. Exception: Motors that are part of listed systems with ratings not exceeding the low-voltage contact limit that are supplied by listed transformers or power supplies that comply with 680.23(A)(2) shall be permitted to be located less than 1.5 m (5 ft) from the inside walls of the pool.", + "displayTitle": "(1) Motors and Controllers", + "children": [], + "url": "https://2023.antflix.net#680.27_(B)_(1)" + }, + { + "body": "The electric motor and controller shall be connected to a GFCI-protected branch circuit. Exception: Motors that are part of listed systems with ratings not exceeding the low-voltage contact limit that are supplied by listed transformers or power supplies that comply with 680.23(A)(2) shall not be required to have GFCI protection.", + "displayTitle": "(2) Protection", + "children": [], + "url": "https://2023.antflix.net#680.27_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#680.27_(B)" + }, + { + "body": "The provisions of this section shall apply to all pool deck areas, including a covered pool, where electrically operated comfort heating units are installed within 6.0 m (20 ft) of the inside wall of the pool.", + "displayTitle": "(C) Deck Area Heating", + "children": [ + { + "body": "Unit heaters shall be rigidly mounted to the structure and shall be of the totally enclosed or guarded type. Unit heaters shall not be mounted over the pool or within the area extending 1.5 m (5 ft) horizontally from the inside walls of a pool.", + "displayTitle": "(1) Unit Heaters", + "children": [], + "url": "https://2023.antflix.net#680.27_(C)_(1)" + }, + { + "body": "Radiant electric heaters shall be suitably guarded and securely fastened to their mounting device(s). Heaters shall not be installed over a pool or within the area extending 1.5 m (5 ft) horizontally from the inside walls of the pool and shall be mounted at least 3.7 m (12 ft) vertically above the pool deck unless otherwise approved.", + "displayTitle": "(2) Permanently Wired Radiant Heaters", + "children": [], + "url": "https://2023.antflix.net#680.27_(C)_(2)" + }, + { + "body": "Radiant heating cables embedded in or below the deck shall not be permitted.", + "displayTitle": "(3) Radiant Heating Cables Not Permitted", + "children": [], + "url": "https://2023.antflix.net#680.27_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#680.27_(C)" + } + ], + "url": "https://2023.antflix.net#680.27" + }, + { + "body": "Circuits serving gas-fired swimming pool and spa water heaters operating at voltages above the low-voltage contact limit shall be provided with GFCI protection.", + "displayTitle": "680.28 Gas-Fired Water Heater", + "children": [], + "url": "https://2023.antflix.net#680.28" + }, + { + "displayTitle": "Part III Storable Pools, Storable Spas, Storable Hot Tubs, and Storable Immersion Pools", + "children": [], + "url": "https://2023.antflix.net#divider_88_III" + }, + { + "body": "Electrical installations at storable pools, storable spas, storable hot tubs, or storable immersion pools shall comply with the provisions of Part I and Part III of this article.", + "displayTitle": "680.30 General", + "children": [], + "url": "https://2023.antflix.net#680.30" + }, + { + "body": "A cord-connected pool filter pump shall incorporate an approved system of double insulation or its equivalent and shall be provided with means for the termination of an equipment grounding conductor for the connection to the internal and nonaccessible non-current-carrying metal parts of the pump. Cord-connected pool filter pumps shall be provided with a GFCI that is an integral part of the attachment plug or located in the power-supply cord within 300 mm (12 in.) of the attachment plug.", + "displayTitle": "680.31 Pumps", + "children": [], + "url": "https://2023.antflix.net#680.31" + }, + { + "body": "All electrical equipment, including power-supply cords, used with storable pools shall have GFCI protection complying with 680.5(B) or SPGFCI protection complying with 680.5(C), as applicable. All receptacles rated 125 volts through 250 volts, 60 amperes or less, located within 6.0 m (20 ft) of the inside walls of a storable pool, storable spa, or storable hot tub shall have GFCI protection complying with 680.5(B) or SPGFCI protection complying with 680.5(C), as applicable. In determining these dimensions, the distance to be measured shall be the shortest path the supply cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, doorway with hinged or sliding door, window opening, or other effective permanent barrier.", + "displayTitle": "680.32 Ground-Fault Circuit-Interrupter (GFCI) and Special Purpose Ground-Fault Circuit-Interrupter (SPGFCI) Protection", + "children": [], + "url": "https://2023.antflix.net#680.32" + }, + { + "body": "An underwater luminaire, if installed, shall be installed in or on the wall of the storable pool, storable spa, or storable hot tub. It shall comply with either 680.33(A) or (B).", + "displayTitle": "680.33 Luminaires", + "children": [ + { + "body": "A luminaire shall be part of a cord-and plug connected lighting assembly. This assembly shall be listed as an assembly for the purpose and have the following construction features: No exposed metal partsA luminaire lamp that is suitable for use at the supplied voltageAn impact-resistant polymeric lens, luminaire body, and transformer enclosureA transformer or power supply meeting the requirements of 680.23(A)(2) with a primary rating not over 150 V", + "displayTitle": "(A) Within the Low-Voltage Contact Limit", + "children": [], + "url": "https://2023.antflix.net#680.33_(A)" + }, + { + "body": "A lighting assembly without a transformer or power supply and with the luminaire lamp(s) operating at not over 150 volts shall be permitted to be cord-and-plug-connected where the assembly is listed as an assembly for the purpose. The installation shall comply with 680.23(A)(5), and the assembly shall have the following construction features: No exposed metal partsAn impact-resistant polymeric lens and luminaire bodyA GFCI with open neutral conductor protection as an integral part of the assemblyThe luminaire lamp permanently connected to the GFCI with open-neutral protectionCompliance with the requirements of 680.23(A)", + "displayTitle": "(B) Over the Low-Voltage Contact Limit but Not Over 150 Volts", + "children": [], + "url": "https://2023.antflix.net#680.33_(B)" + } + ], + "url": "https://2023.antflix.net#680.33" + }, + { + "body": "Receptacles shall not be located less than 1.83 m (6 ft) from the inside walls of a storable pool, storable spa, or storable hot tub. In determining these dimensions, the distance to be measured shall be the shortest path the supply cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, doorway with hinged or sliding door, window opening, or other effective permanent barrier.", + "displayTitle": "680.34 Receptacle Locations", + "children": [], + "url": "https://2023.antflix.net#680.34" + }, + { + "body": "Storable and portable immersion pools shall additionally comply with 680.35(A) through (G).", + "displayTitle": "680.35 Storable and Portable Immersion Pools", + "children": [ + { + "body": "Self-contained storable and portable packaged immersion pools with identified integral permanently attached switches and/or controls, pumps, and/or heaters, including circulation heaters, rated 120 volts and 20 amperes or less, single phase, shall be permitted to be cord-and-plug-connected with a cord not shorter than 1.83 m (6 ft) and not longer than 4.6 m (15 ft), and shall be GFCI protected . The cord shall be minimum hard usage. If the GFCI is provided as an integral part of the cord assembly, it shall be located at the attachment plug or in the power supply cord within 300 mm (12 in.) of the attachment plug.", + "displayTitle": "(A) Cord Connection for Self-Contained Storable and Portable Immersion Pools", + "children": [], + "url": "https://2023.antflix.net#680.35_(A)" + }, + { + "body": "A cord-connected storable or portable pump utilized with, but not built-in or permanently attached as an integral part of, a storable or portable immersion pool shall be listed, labeled, and identified for swimming pool and spa use, and shall meet the requirements of 680.31.", + "displayTitle": "(B) Storable and Portable Pumps", + "children": [], + "url": "https://2023.antflix.net#680.35_(B)" + }, + { + "body": "A storable or portable heater, including circulation heaters, used with, but not built-in or permanently attached as an integral part of, a storable or portable immersion pool shall be rated 120 volts and 20 amperes or less or 250 volts and 30 amperes or less, single phase; shall be identified for swimming pool and spa use; shall be permitted to be cord-and-plug-connected with a cord not shorter than 1.83 m (6 ft) and not longer than 4.6 m (15 ft); and heaters supplied by branch circuits rated 150 volts or less to ground shall be provided with GFCI protection. The cord shall be minimum hard usage. If the GFCI is provided as an integral part of the cord assembly, it shall be located at the attachment plug or in the power supply cord within 300 mm (12 in.) of the attachment plug.", + "displayTitle": "(C) Storable and Portable Heaters", + "children": [], + "url": "https://2023.antflix.net#680.35_(C)" + }, + { + "body": "Audio equipment shall not be installed in or on a self-contained storable or portable immersion pool. All audio equipment operating at greater than the low-voltage contact limit and located within 1.83 m (6 ft) from the inside walls of a storable or portable immersion pool shall be grounded and shall be GFCI protected.", + "displayTitle": "(D) Audio Equipment", + "children": [], + "url": "https://2023.antflix.net#680.35_(D)" + }, + { + "body": "The storable or portable immersion pool shall be installed at least 3 m (10 ft), measured diagonally from the nearest point on each luminaire, lighting outlet, and ceiling-suspended (paddle) fan operating at greater than the low-voltage contact limit, to the nearest point on the top rim of the immersion pool. Luminaires shall not be installed in or on a storable or portable immersion pool.", + "displayTitle": "(E) Location Proximate to Luminaires, Lighting Outlets, and Ceiling-Suspended (Paddle) Fans", + "children": [], + "url": "https://2023.antflix.net#680.35_(E)" + }, + { + "body": "The storable or portable immersion pool shall be installed at least 1.5 m (5 ft), measured horizontally, from all switches operating above the low-voltage contact limit. Switches that are packaged with the immersion pool as an integral part of its internal electrical system, or that are integral to cord-and-plug-connected electrical equipment utilized in the pool's water circulation or drain system, including storable and portable pumps, heaters, and circulation heaters, shall be permitted to be located less than 1.5 m (5 ft) from the inside walls of the pool.", + "displayTitle": "(F) Location Proximate to Switches", + "children": [], + "url": "https://2023.antflix.net#680.35_(F)" + }, + { + "body": "All receptacles rated 250 volts, 50 amperes or less, located within 6.0 m (20 ft) of the inside walls of the installed storable or portable immersion pool and utilized for supplying power to heaters or other electrical equipment serving the immersion pool, shall meet the requirements of 680.32 and 680.34.", + "displayTitle": "(G) Receptacles", + "children": [], + "url": "https://2023.antflix.net#680.35_(G)" + } + ], + "url": "https://2023.antflix.net#680.35" + }, + { + "displayTitle": "Part IV Permanently Installed and Self-Contained Spas and Hot Tubs and Permanently Installed Immersion Pools", + "children": [], + "url": "https://2023.antflix.net#divider_34_IV" + }, + { + "body": "Electrical installations at spas and hot tubs shall comply with the provisions of Part I and Part IV of this article.", + "displayTitle": "680.40 General", + "children": [], + "url": "https://2023.antflix.net#680.40" + }, + { + "displayTitle": "680.41 Location of Other Equipment", + "children": [ + { + "body": "For other than one-family dwellings, a clearly labeled emergency shutoff or control switch for the purpose of stopping the motor(s) that provides power to the recirculation system and jet system shall be installed at a point readily accessible to the users and not less than 1.5 m (5 ft) away, adjacent to, and within sight of the spa or hot tub.", + "displayTitle": "(A) Emergency Switch for Spas and Hot Tubs", + "children": [], + "url": "https://2023.antflix.net#680.41_(A)" + }, + { + "body": "Except for self-contained spas and hot tubs, equipment with ratings exceeding the low-voltage contact limit shall be located at least 1.5 m (5 ft) horizontally from the inside walls of a spa or hot tub, unless separated from the spa or hot tub by a solid fence, wall, or other permanent barrier.", + "displayTitle": "(B) Equipment Exceeding the Low-Voltage Contact Limit", + "children": [], + "url": "https://2023.antflix.net#680.41_(B)" + } + ], + "url": "https://2023.antflix.net#680.41" + }, + { + "body": "A spa or hot tub installed outdoors shall comply with the provisions of Parts I and II of this article, except as permitted in 680.42(A) and (B), that would otherwise apply to pools installed outdoors.", + "displayTitle": "680.42 Outdoor Installations", + "children": [ + { + "body": "Listed packaged spa or hot tub equipment assemblies or self-contained spas or hot tubs utilizing a factory-installed or assembled control panel or panelboard shall be permitted to use flexible connections as covered in 680.42(A)(1) and (A)(2).", + "displayTitle": "(A) Flexible Connections", + "children": [ + { + "body": "Liquidtight flexible metal conduit or liquidtight flexible nonmetallic conduit shall be permitted.", + "displayTitle": "(1) Flexible Conduit", + "children": [], + "url": "https://2023.antflix.net#680.42_(A)_(1)" + }, + { + "body": "Cord-and-plug connections with a cord not longer than 4.6 m (15 ft) shall be permitted if GFCI protected.", + "displayTitle": "(2) Cord-and-Plug Connections", + "children": [], + "url": "https://2023.antflix.net#680.42_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#680.42_(A)" + }, + { + "body": "Bonding by metal-to-metal mounting on a common frame or base shall be permitted. The metal bands or hoops used to secure wooden staves shall not be required to be bonded as required in 680.26. Equipotential bonding of perimeter surfaces in accordance with 680.26(B)(2) shall not be required to be provided for spas and hot tubs where all of the following conditions apply:The spa or hot tub shall be listed, labeled, and identified as a self-contained spa for aboveground use.The spa or hot tub shall not be identified as suitable only for indoor use.The installation shall be in accordance with the manufacturer's instructions and shall be located on or above grade.The top rim of the spa or hot tub shall be at least 710 mm (28 in.) above all perimeter surfaces that are within 760 mm (30 in.), measured horizontally from the spa or hot tub. The height of nonconductive external steps for entry to or exit from the self-contained spa shall not be used to reduce or increase this rim height measurement.Informational Note: See ANSI/UL 1563, Standard for Electric Spas, Equipment Assemblies, and Associated Equipment, for information regarding listing requirements for self-contained spas and hot tubs.", + "displayTitle": "(B) Bonding", + "children": [], + "url": "https://2023.antflix.net#680.42_(B)" + }, + { + "body": "Wiring to an underwater luminaire shall comply with 680.23 or 680.33.", + "displayTitle": "(C) Underwater Luminaires", + "children": [], + "url": "https://2023.antflix.net#680.42_(C)" + } + ], + "url": "https://2023.antflix.net#680.42" + }, + { + "body": "A spa or hot tub installed indoors shall comply with the provisions of Parts I and II of this article except as modified by this section and shall be connected by the wiring methods of Chapter 3. Exception No. 1: Listed spa and hot tub packaged units rated 20 amperes or less shall be permitted to be cord-and-plug-connected to facilitate the removal or disconnection of the unit for maintenance and repair. Exception No. 2: The equipotential bonding requirements for perimeter surfaces in 680.26(B)(2) shall not apply to a listed self-contained spa or hot tub installed above a finished floor. Exception No. 3: For a dwelling unit(s) only, where a listed spa or hot tub is installed indoors, the wiring method requirements of 680.42(C) shall also apply.", + "displayTitle": "680.43 Indoor Installations", + "children": [ + { + "body": "At least one 125-volt, 15- or 20-ampere receptacle on a general-purpose branch circuit shall be located not less than 1.83 m (6 ft) from, and not exceeding 3.0 m (10 ft) from, the inside wall of the spa or hot tub.", + "displayTitle": "(A) Receptacles", + "children": [ + { + "body": "All receptacles shall be located at least 1.83 m (6 ft) measured horizontally from the inside walls of the spa or hot tub.", + "displayTitle": "(1) Location", + "children": [], + "url": "https://2023.antflix.net#680.43_(A)_(1)" + }, + { + "body": "All receptacles rated 125 volts through 250 volts, 60 amperes or less, located within 3.0 m (10 ft) of the inside walls of a spa or hot tub shall have GFCI protection complying with 680.5(B) or SPGFCI protection complying with 680.5(C), as applicable.", + "displayTitle": "(2) Ground-Fault Circuit-Interrupter (GFCI) and Special Purpose Ground-Fault Circuit-Interrupter (SPGFCI) Protection for Receptacles, General", + "children": [], + "url": "https://2023.antflix.net#680.43_(A)_(2)" + }, + { + "body": "Receptacles that provide power for a spa or hot tub shall not exceed 150 volts to ground and shall be GFCI protected.", + "displayTitle": "(3) Protection, Spa or Hot Tub Supply Receptacle", + "children": [], + "url": "https://2023.antflix.net#680.43_(A)_(3)" + }, + { + "body": "In determining the dimensions in this section addressing receptacle spacings, the distance to be measured shall be the shortest path the supply cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, doorway with hinged or sliding door, window opening, or other effective permanent barrier.", + "displayTitle": "(4) Measurements", + "children": [], + "url": "https://2023.antflix.net#680.43_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#680.43_(A)" + }, + { + "displayTitle": "(B) Installation of Luminaires, Lighting Outlets, and Ceiling-Suspended (Paddle) Fans", + "children": [ + { + "body": "Luminaires, except as covered in 680.43(B)(2), lighting outlets, and ceiling-suspended (paddle) fans located over the spa or hot tub or within 1.5 m (5 ft) from the inside walls of the spa or hot tub shall comply with the clearances specified in 680.43(B)(1)(a), (B)(1)(b), and (B)(1)(c) above the maximum water level. Without GFCI. Where no GFCI protection is provided, the mounting height shall be not less than 3.7 m (12 ft).With GFCI. Where GFCI protection is provided, the mounting height shall be permitted to be not less than 2.3 m (7 ft 6 in.).Below 2.3 m (7 ft 6 in.). Luminaires meeting the requirements of item (1) or (2) and protected by a ground-fault circuit interrupter shall be permitted to be installed less than 2.3 m (7 ft 6 in.) over a spa or hot tub:Recessed luminaires with a glass or plastic lens, nonmetallic or electrically isolated metal trim, and suitable for use in damp locationsSurface-mounted luminaires with a glass or plastic globe, a nonmetallic body, or a metallic body isolated from contact, and suitable for use in damp locations", + "displayTitle": "(1) Elevation", + "children": [], + "url": "https://2023.antflix.net#680.43_(B)_(1)" + }, + { + "body": "Underwater luminaires shall comply with the provisions of 680.23 or 680.33.", + "displayTitle": "(2) Underwater Applications", + "children": [], + "url": "https://2023.antflix.net#680.43_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#680.43_(B)" + }, + { + "body": "Switches shall be located at least 1.5 m (5 ft), measured horizontally, from the inside walls of the spa or hot tub.", + "displayTitle": "(C) Switches", + "children": [], + "url": "https://2023.antflix.net#680.43_(C)" + }, + { + "body": "The following parts shall be bonded together: All metal fittings within or attached to the spa or hot tub structureMetal parts of electrical equipment associated with the spa or hot tub water circulating system, including pump motors, unless part of a listed, labeled, and identified self-contained spa or hot tubMetal raceway and metal piping that are within 1.5 m (5 ft) of the inside walls of the spa or hot tub and that are not separated from the spa or hot tub by a permanent barrierAll metal surfaces that are within 1.5 m (5 ft) of the inside walls of the spa or hot tub and that are not separated from the spa or hot tub area by a permanent barrierException: Small conductive surfaces not likely to become energized, such as air and water jets and drain fittings, where not connected to metallic piping, towel bars, mirror frames, and similar nonelectrical equipment, shall not be required to be bonded.Non-current-carrying metal parts of electrical devices and controls that are not associated with the spas or hot tubs and that are located within 1.5 m (5 ft) of such units", + "displayTitle": "(D) Bonding", + "children": [], + "url": "https://2023.antflix.net#680.43_(D)" + }, + { + "body": "All metal parts associated with the spa or hot tub shall be bonded by any of the following methods: The interconnection of threaded metal piping and fittingsMetal-to-metal mounting on a common frame or baseThe provisions of a solid copper bonding jumper, insulated, covered, or bare, not smaller than 8 AWG", + "displayTitle": "(E) Methods of Bonding", + "children": [], + "url": "https://2023.antflix.net#680.43_(E)" + }, + { + "body": "The following equipment shall be connected to the equipment grounding conductor: All electrical equipment located within 1.5 m (5 ft) of the inside wall of the spa or hot tubAll electrical equipment associated with the circulating system of the spa or hot tubException to (1) and (2): Electrical equipment listed for operation at the low-voltage contact limit or less and supplied by a transformer or power supply that complies with 680.23(A)(2) shall not be required to be connected to the equipment grounding conductor.", + "displayTitle": "(F) Grounding", + "children": [], + "url": "https://2023.antflix.net#680.43_(F)" + }, + { + "body": "Underwater audio equipment shall comply with the provisions of Part II of this article.", + "displayTitle": "(G) Underwater Audio Equipment", + "children": [], + "url": "https://2023.antflix.net#680.43_(G)" + } + ], + "url": "https://2023.antflix.net#680.43" + }, + { + "displayTitle": "680.44 Ground-Fault Circuit-Interrupter (GFCI) and Special Purpose Ground-Fault Circuit-Interrupter (SPGFCI) Protection", + "children": [ + { + "body": "Except as otherwise provided in this section, the outlet(s) that supplies a self-contained spa or hot tub, a packaged spa or hot tub equipment assembly, or a field-assembled spa or hot tub shall have GFCI protection complying with 680.5(B) or SPGFCI protection complying with 680.5(C), as applicable.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#680.44_(A)" + }, + { + "body": "If so marked, a listed self-contained unit or a listed packaged equipment assembly that includes integral GFCI protection for all electrical parts within the unit or assembly (pumps, air blowers, heaters, lights, controls, sanitizer generators, wiring, and so forth) shall be permitted without additional ground-fault protection.", + "displayTitle": "(B) Listed Units", + "children": [], + "url": "https://2023.antflix.net#680.44_(B)" + }, + { + "body": "Circuits serving gas-fired spa and hot tub water heaters operating separately from the spa or hot tub they serve, and operating at voltages above the low-voltage contact limit, shall be GFCI protected.", + "displayTitle": "(C) Gas-Fired Water Heaters", + "children": [], + "url": "https://2023.antflix.net#680.44_(C)" + } + ], + "url": "https://2023.antflix.net#680.44" + }, + { + "body": "Electrical installations at permanently installed immersion pools, whether installed indoors or outdoors, shall comply with the provisions of Part I, Part II, and Part IV of this article except as modified by this section and shall be connected by the wiring methods of Chapter 3. With regard to provisions in Part IV of this article, an immersion pool shall be considered to be a spa or hot tub. Exception No. 1: The equipotential bonding requirements in 680.26(B) shall not apply to immersion pools that incorporate no permanently installed or permanently connected electrical equipment, and that are installed with all portions located on or above a finished floor. Exception No. 2: The equipotential bonding requirements for perimeter surfaces in 680.26(B)(2) shall not apply to nonconductive perimeter surfaces, such as steps, treads, and walking surfaces made of fiberglass composite.", + "displayTitle": "680.45 Permanently Installed Immersion Pools", + "children": [ + { + "body": "To facilitate the removal or disconnection of the unit(s) for maintenance, storage, and repair, self-contained portable packaged immersion pools with integral pumps and/or heaters, including circulation heaters, rated 120 volts and 20 amperes or less shall be permitted to be cord-and-plug-connected with a cord not shorter than 1.83 m (6 ft) and not longer than 4.6 m (15 ft) and shall be GFCI protected. The cord shall ground all non-current-carrying metal parts of the electrical equipment. If the GFCI is provided as an integral part of the cord assembly, it shall be located at the attachment plug or in the power-supply cord within 300 mm (12 in.) of the attachment plug.", + "displayTitle": "(A) Cord-and-Plug Connections", + "children": [], + "url": "https://2023.antflix.net#680.45_(A)" + }, + { + "body": "A cord-connected storable or portable pump used with, but not built-in or permanently attached as an integral part of, a permanently installed immersion pool shall be identified for swimming pool and spa use. It shall incorporate an approved system of double insulation or its equivalent and shall be provided with means for grounding only the internal and nonaccessible non-current-carrying metal parts of the appliance. Cord-connected pool filter pumps shall be provided with a GFCI that is an integral part of the attachment plug or located in the power-supply cord within 300 mm (12 in.) of the attachment plug.", + "displayTitle": "(B) Storable and Portable Pumps", + "children": [], + "url": "https://2023.antflix.net#680.45_(B)" + }, + { + "body": "Heaters used with permanently installed immersion pools shall comply with either 680.45(C)(1) or (C)(2).", + "displayTitle": "(C) Heaters", + "children": [ + { + "body": "A permanently installed heater, including immersion heaters, circulation heaters, and combination pump-heater units, built-in or permanently attached as an integral part of a permanently installed immersion pool, rated 120 volts or 250 volts, shall be identified for swimming pool and spa use; shall be grounded and bonded; and heaters supplied by branch circuits rated 150 volts or less to ground shall be provided with GFCI protection. Permanently installed immersion heaters, rated 120 volts and 20 amperes or less or 250 volts and 30 amperes or less, single phase, are permitted to be cord-and-plug-connected with a cord not shorter than 1.83 m (6 ft) and not longer than 4.6 m (15 ft), shall be GFCI protected, and shall be provided with means for grounding all non-current-carrying metal parts of the appliance. If the GFCI is provided as an integral part of the cord assembly, it shall be located at the attachment plug or in the power-supply cord within 300 mm (12 in.) of the attachment plug.", + "displayTitle": "(1) Permanently Installed Heaters", + "children": [], + "url": "https://2023.antflix.net#680.45_(C)_(1)" + }, + { + "body": "A cord-connected storable or portable heater, including immersion heaters, circulation heaters, and combination pump-heater units, used with, but not permanently installed or attached as an integral part of a permanently installed immersion pool, rated 120 volts and 20 amperes or less or 250 volts and 30 amperes or less, single phase, shall be identified for swimming pool and spa use; shall be cord-and-plug-connected with a cord not shorter than 1.83 m (6 ft) and not longer than 4.6 m (15 ft), heaters supplied by branch circuits rated 150 volts or less to ground shall be provided with Class A ground-fault circuit-interrupter protection, and shall be provided with means for grounding all non-current-carrying metal parts of the appliance. If the ground-fault circuit interrupter is provided as an integral part of the cord assembly, it shall be located at the attachment plug or in the power-supply cord within 300 mm (12 in.) of the attachment plug.", + "displayTitle": "(2) Storable and Portable Heaters", + "children": [], + "url": "https://2023.antflix.net#680.45_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#680.45_(C)" + }, + { + "body": "Audio equipment shall not be installed in or on a permanently installed immersion pool. All audio equipment operating at greater than the low-voltage contact limit and located within 1.83 m (6 ft) from the inside walls of a permanently installed immersion pool shall be connected to the equipment grounding conductor and GFCI protected.", + "displayTitle": "(D) Audio Equipment", + "children": [], + "url": "https://2023.antflix.net#680.45_(D)" + } + ], + "url": "https://2023.antflix.net#680.45" + }, + { + "displayTitle": "Part V Fountains", + "children": [], + "url": "https://2023.antflix.net#divider_23_V" + }, + { + "body": "Part I and Part V of this article shall apply to all permanently installed fountains.", + "displayTitle": "680.50 General", + "children": [ + { + "body": "Fountains that have water common to a pool shall also comply with Part II of Article 680.Fountains intended for recreational use by pedestrians, including splash pads, shall also comply with the requirements in 680.26.Part V does not apply to self-contained, portable fountains, which shall comply with Parts II and III of Article 422.", + "displayTitle": "(A) Additional Requirements", + "children": [], + "url": "https://2023.antflix.net#680.50_(A)" + }, + { + "body": "Equipment with ratings exceeding the low-voltage contact limit shall be located at least 1.5 m (5 ft) horizontally from the inside walls of a fountain, unless separated from the fountain by a solid fence, wall, or other permanent barrier.", + "displayTitle": "(B) Location of Equipment Exceeding the Low-Voltage Contact Limit", + "children": [], + "url": "https://2023.antflix.net#680.50_(B)" + } + ], + "url": "https://2023.antflix.net#680.50" + }, + { + "displayTitle": "680.51 Luminaires. Submersible Pumps, and Other Submersible Equipment", + "children": [ + { + "body": "Luminaires, submersible pumps, and other submersible equipment, unless listed for operation at low-voltage contact limit or less and supplied by a transformer or power supply that complies with 680.23(A)(2), shall be GFCI protected.", + "displayTitle": "(A) Ground-Fault Circuit Interrupter", + "children": [], + "url": "https://2023.antflix.net#680.51_(A)" + }, + { + "body": "No luminaires shall be installed for operation on supply circuits over 150 volts between conductors. Submersible pumps and other submersible equipment shall operate at 300 volts or less between conductors.", + "displayTitle": "(B) Operating Voltage", + "children": [], + "url": "https://2023.antflix.net#680.51_(B)" + }, + { + "body": "Luminaires shall be installed with the top of the luminaire lens below the normal water level of the fountain unless listed for above-water locations. A luminaire facing upward shall comply with either (1) or (2): Have the lens guarded to prevent contact by any personBe listed for use without a guard", + "displayTitle": "(C) Luminaire Lenses", + "children": [], + "url": "https://2023.antflix.net#680.51_(C)" + }, + { + "body": "Electrical equipment that depends on submersion for safe operation shall be protected against overheating by a low-water cutoff or other approved means when not submerged.", + "displayTitle": "(D) Overheating Protection", + "children": [], + "url": "https://2023.antflix.net#680.51_(D)" + }, + { + "body": "Equipment shall be equipped with provisions for threaded conduit entries or be provided with a suitable flexible cord. The maximum length of each exposed cord in the fountain shall be limited to 3.0 m (10 ft). Cords extending beyond the fountain perimeter shall be enclosed in approved wiring enclosures. Metal parts of equipment in contact with water shall be of brass or other approved corrosion-resistant metal.", + "displayTitle": "(E) Wiring", + "children": [], + "url": "https://2023.antflix.net#680.51_(E)" + }, + { + "body": "All equipment shall be removable from the water for relamping or normal maintenance. Luminaires shall not be permanently embedded into the fountain structure such that the water level must be reduced or the fountain drained for relamping, maintenance, or inspection.", + "displayTitle": "(F) Servicing", + "children": [], + "url": "https://2023.antflix.net#680.51_(F)" + }, + { + "body": "Equipment shall be inherently stable or be securely fastened in place.", + "displayTitle": "(G) Stability", + "children": [], + "url": "https://2023.antflix.net#680.51_(G)" + } + ], + "url": "https://2023.antflix.net#680.51" + }, + { + "displayTitle": "680.52 Junction Boxes and Other Enclosures", + "children": [ + { + "body": "Junction boxes and other enclosures used for other than underwater installation shall comply with 680.24.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#680.52_(A)" + }, + { + "body": "Junction boxes and other underwater enclosures shall meet the requirements of 680.52(B)(1) and (B)(2).", + "displayTitle": "(B) Underwater Junction Boxes and Other Underwater Enclosures", + "children": [ + { + "body": "Underwater enclosures shall be equipped with provisions for threaded conduit entries or compression glands or seals for cord entry.Underwater enclosures shall be listed and rated for prolonged submersion and made of copper, brass, or other corrosion-resistant material.", + "displayTitle": "(1) Construction", + "children": [], + "url": "https://2023.antflix.net#680.52_(B)_(1)" + }, + { + "body": "Underwater enclosure installations shall comply with 680.52(B)(2)(a) and (B)(2)(b). Underwater enclosures shall be filled with a listed potting compound to prevent the entry of moisture.Underwater enclosures shall be firmly attached to the supports or directly to the fountain surface and bonded as required. Where the junction box is supported only by conduits in accordance with 314.23(E) and (F), the conduits shall be of copper, brass, stainless steel, or other corrosion-resistant metal. Where the box is fed by nonmetallic conduit, it shall have additional supports and fasteners of copper, brass, or other corrosion-resistant material.", + "displayTitle": "(2) Installation", + "children": [], + "url": "https://2023.antflix.net#680.52_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#680.52_(B)" + } + ], + "url": "https://2023.antflix.net#680.52" + }, + { + "displayTitle": "680.54 Grounding and Bonding", + "children": [ + { + "body": "The following equipment shall be connected to an equipment grounding conductor: All electrical equipment located within the fountain or within 1.5 m (5 ft) of the inside wall of the fountain, other than listed low-voltage luminaires not requiring groundingAll electrical equipment associated with the recirculating system of the fountainPanelboards that are not part of the service equipment and that supply any electrical equipment associated with the fountain", + "displayTitle": "(A) Grounding", + "children": [], + "url": "https://2023.antflix.net#680.54_(A)" + }, + { + "body": "If a conductor is used for bonding, it shall be a minimum 8 AWG solid copper conductor. The following parts shall be bonded together and connected to an equipment grounding conductor for a branch circuit supplying fountain equipment: All metal piping systems associated with the fountainAll metal fittings within or attached to the fountainMetal parts of electrical equipment associated with the fountain water-circulating system, including pump motorsMetal raceways that are within 1.5 m (5 ft) of the inside wall or perimeter of the fountain and that are not separated from the fountain by a permanent barrierAll metal surfaces that are within 1.5 m (5 ft) of the inside wall or perimeter of the fountain and that are not separated from the fountain by a permanent barrierElectrical equipment located less than 1.5 m (5 ft) of the inside wall or perimeter of the fountain", + "displayTitle": "(B) Bonding", + "children": [], + "url": "https://2023.antflix.net#680.54_(B)" + }, + { + "body": "For the purpose of equipotential bonding, the shell of a splash pad shall comprise the area traversed by pedestrians bounded by the extent of the footing of the splash pad and rising to its exposed surface(s) and its collection basin area. The boundary of this area shall be considered to be the inside wall for the purpose of perimeter bonding.", + "displayTitle": "(C) Equipotential Bonding of Splash Pads", + "children": [], + "url": "https://2023.antflix.net#680.54_(C)" + } + ], + "url": "https://2023.antflix.net#680.54" + }, + { + "displayTitle": "680.55 Methods of Grounding", + "children": [ + { + "body": "The provisions of 680.7(A), 680.21(A), 680.23(B)(3), 680.23(F)(1) and (F)(2), and 680.24(F) shall apply.", + "displayTitle": "(A) Applied Provisions", + "children": [], + "url": "https://2023.antflix.net#680.55_(A)" + }, + { + "body": "Electrical equipment that is supplied by a flexible cord shall have all exposed non-current-carrying metal parts grounded by an insulated copper equipment grounding conductor that is an integral part of this cord. The equipment grounding conductor shall be connected to an equipment grounding terminal in the supply junction box, transformer enclosure, power supply enclosure, or other enclosure.", + "displayTitle": "(B) Supplied by a Flexible Cord", + "children": [], + "url": "https://2023.antflix.net#680.55_(B)" + } + ], + "url": "https://2023.antflix.net#680.55" + }, + { + "displayTitle": "680.56 Cord-and-Plug-Connected Equipment", + "children": [ + { + "body": "All electrical equipment, including power-supply cords, shall be GFCI protected.", + "displayTitle": "(A) GFCI Protection", + "children": [], + "url": "https://2023.antflix.net#680.56_(A)" + }, + { + "body": "Flexible cord immersed in or exposed to water shall be of a type for extra-hard usage, as designated in Table 400.4, and shall be a listed type with a \"W\" suffix.", + "displayTitle": "(B) Cord Type", + "children": [], + "url": "https://2023.antflix.net#680.56_(B)" + }, + { + "body": "The end of the flexible cord jacket and the flexible cord conductor termination within equipment shall be covered with, or encapsulated in, a suitable potting compound to prevent the entry of water into the equipment through the cord or its conductors. In addition, the ground connection within equipment shall be similarly treated to protect such connections from the deteriorating effect of water that may enter into the equipment.", + "displayTitle": "(C) Sealing", + "children": [], + "url": "https://2023.antflix.net#680.56_(C)" + }, + { + "body": "Connections with flexible cord shall be permanent, except that grounding-type attachment plugs and receptacles shall be permitted to facilitate removal or disconnection for maintenance, repair, or storage of fixed or stationary equipment not located in any water-containing part of a fountain.", + "displayTitle": "(D) Terminations", + "children": [], + "url": "https://2023.antflix.net#680.56_(D)" + } + ], + "url": "https://2023.antflix.net#680.56" + }, + { + "displayTitle": "680.57 Signs", + "children": [ + { + "body": "This section covers electric signs installed within a fountain or within 3.0 m (10 ft) of the fountain edge.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#680.57_(A)" + }, + { + "body": "Branch circuits or feeders supplying the sign shall have GFCI protection.", + "displayTitle": "(B) GFCI Protection", + "children": [], + "url": "https://2023.antflix.net#680.57_(B)" + }, + { + "displayTitle": "(C) Location", + "children": [ + { + "body": "A fixed or stationary electric sign installed within a fountain shall be not less than 1.5 m (5 ft) inside the fountain measured from the outside edges of the fountain.", + "displayTitle": "(1) Fixed or Stationary", + "children": [], + "url": "https://2023.antflix.net#680.57_(C)_(1)" + }, + { + "body": "A portable electric sign shall not be placed within a pool or fountain or within 1.5 m (5 ft) measured horizontally from the inside walls of the fountain.", + "displayTitle": "(2) Portable", + "children": [], + "url": "https://2023.antflix.net#680.57_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#680.57_(C)" + }, + { + "body": "A sign shall have a local disconnecting means in accordance with 600.6 and 680.13.", + "displayTitle": "(D) Disconnect", + "children": [], + "url": "https://2023.antflix.net#680.57_(D)" + }, + { + "body": "A sign shall be grounded and bonded in accordance with 600.7.", + "displayTitle": "(E) Bonding and Grounding", + "children": [], + "url": "https://2023.antflix.net#680.57_(E)" + } + ], + "url": "https://2023.antflix.net#680.57" + }, + { + "body": "All receptacles rated 125 volts through 250 volts, 60 amperes or less, located within 6.0 m (20 ft) of a fountain edge shall have GFCI protection complying with 680.5(B) or SPGFCI protection complying with 680.5(C), as applicable.", + "displayTitle": "680.58 Ground-Fault Circuit-Interrupter (GFCI) and Special Purpose Ground-Fault Circuit-Interrupter (SPGFCI) Protection for Adjacent Receptacle Outlets", + "children": [], + "url": "https://2023.antflix.net#680.58" + }, + { + "body": "Outlets supplying all permanently installed nonsubmersible pump motors shall have GFCI protection complying with 680.5(B) or SPGFCI protection complying with 680.5(C), as applicable. Exception: Listed low-voltage motors not requiring grounding, with ratings not exceeding the low-voltage contact limit that are supplied by listed transformers or power supplies that comply with 680.23(A)(2), shall be permitted to be installed without GFCI or SPGFCI protection.", + "displayTitle": "680.59 Ground-Fault Circuit-Interrupter (GFCI) and Special Purpose Ground-Fault Circuit-Interrupter (SPGFCI) Protection for Permanently Installed Nonsubmersible Pumps", + "children": [], + "url": "https://2023.antflix.net#680.59" + }, + { + "displayTitle": "Part VI Pools and Tubs for Therapeutic Use", + "children": [], + "url": "https://2023.antflix.net#divider_16_VI" + }, + { + "body": "The provisions of Part I and Part VI of this article shall apply to pools and tubs for therapeutic use in health care facilities, gymnasiums, athletic training rooms, and similar areas. Portable therapeutic appliances shall comply with Parts II and III of Article 422.", + "displayTitle": "680.60 General", + "children": [], + "url": "https://2023.antflix.net#680.60" + }, + { + "body": "Therapeutic pools that are constructed in the ground, on the ground, or in a building in such a manner that the pool cannot be readily disassembled shall comply with Parts I and II of this article. Exception: The limitations of 680.22(B)(1) through (B)(4) shall not apply where all luminaires are of the totally enclosed type.", + "displayTitle": "680.61 Permanently Installed Therapeutic Pools", + "children": [], + "url": "https://2023.antflix.net#680.61" + }, + { + "body": "Therapeutic tubs, used for the submersion and treatment of patients, that are not easily moved from one place to another in normal use or that are fastened or otherwise secured at a specific location, including associated piping systems, shall comply with Part VI.", + "displayTitle": "680.62 Therapeutic Tubs (Hydrotherapeutic Tanks)", + "children": [ + { + "body": "Except as otherwise provided in this section, the outlet(s) that supplies a self-contained therapeutic tub or hydrotherapeutic tank, a packaged therapeutic tub or hydro-therapeutic tank, or a field-assembled therapeutic tub or hydrotherapeutic tank shall be GFCI protected.", + "displayTitle": "(A) Protection", + "children": [ + { + "body": "If so marked, a listed, labeled, and identified self-contained unit or a listed, labeled, and identified packaged equipment assembly that includes integral ground-fault circuit-interrupter protection for all electrical parts within the unit or assembly (pumps, air blowers, heaters, lights, controls, sanitizer generators, wiring, and so forth) shall be permitted without additional GFCI protection.", + "displayTitle": "(1) Listed Units", + "children": [], + "url": "https://2023.antflix.net#680.62_(A)_(1)" + }, + { + "body": "A therapeutic tub or hydrotherapeutic tank rated 3 phase or rated over 250 volts or with a heater load of more than 50 amperes shall not require the supply to be protected by a ground-fault circuit interrupter.", + "displayTitle": "(2) Other Units", + "children": [], + "url": "https://2023.antflix.net#680.62_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#680.62_(A)" + }, + { + "body": "The following parts shall be bonded together: All metal fittings within or attached to the tub structureMetal parts of electrical equipment associated with the tub water circulating system, including pump motorsMetal-sheathed cables and raceways and metal piping that are within 1.5 m (5 ft) of the inside walls of the tub and not separated from the tub by a permanent barrierAll metal surfaces that are within 1.5 m (5 ft) of the inside walls of the tub and not separated from the tub area by a permanent barrierElectrical devices and controls that are not associated with the therapeutic tubs and located within 1.5 m (5 ft) from such units.Exception: Small conductive surfaces not likely to become energized, such as air and water jets and drain fittings not connected to metallic piping, and towel bars, mirror frames, and similar nonelectrical equipment not connected to metal framing, shall not be required to be bonded.", + "displayTitle": "(B) Bonding", + "children": [], + "url": "https://2023.antflix.net#680.62_(B)" + }, + { + "body": "All metal parts required to be bonded by this section shall be bonded by any of the following methods: The interconnection of threaded metal piping and fittingsMetal-to-metal mounting on a common frame or baseConnections by suitable metal clampsBy the provisions of a solid copper bonding jumper, insulated, covered, or bare, not smaller than 8 AWG", + "displayTitle": "(C) Methods of Bonding", + "children": [], + "url": "https://2023.antflix.net#680.62_(C)" + }, + { + "body": "The following fixed or stationary equipment shall be connected to the equipment grounding conductor: All electrical equipment located within 1.5 m (5 ft) of the inside wall of the tubAll electrical equipment associated with the circulating system of the tub", + "displayTitle": "(D) Grounding", + "children": [], + "url": "https://2023.antflix.net#680.62_(D)" + }, + { + "body": "All receptacles within 1.83 m (6 ft) of a therapeutic tub shall have ground-fault protection complying with 680.5(B) or (C), as applicable.", + "displayTitle": "(E) Receptacles", + "children": [], + "url": "https://2023.antflix.net#680.62_(E)" + }, + { + "body": "All luminaires used in therapeutic tub areas shall be of the totally enclosed type.", + "displayTitle": "(F) Luminaires", + "children": [], + "url": "https://2023.antflix.net#680.62_(F)" + } + ], + "url": "https://2023.antflix.net#680.62" + }, + { + "displayTitle": "Part VII Hydromassage Bathtubs", + "children": [], + "url": "https://2023.antflix.net#divider_14_VII" + }, + { + "body": "Hydromassage bathtubs as defined in Article 100 shall comply with Part VII of this article. They shall not be required to comply with other parts of this article.", + "displayTitle": "680.70 General", + "children": [], + "url": "https://2023.antflix.net#680.70" + }, + { + "body": "Hydromassage bathtubs and their associated electrical components shall be on an individual branch circuit(s) and protected by a readily accessible GFCI. All 125-volt, single-phase receptacles not exceeding 30 amperes and located within 1.83 m (6 ft) measured horizontally of the inside walls of a hydromassage tub shall be GFCI protected.", + "displayTitle": "680.71 Protection", + "children": [], + "url": "https://2023.antflix.net#680.71" + }, + { + "body": "Luminaires, switches, receptacles, and other electrical equipment located in the same room, and not directly associated with a hydromassage bathtub, shall be installed in accordance with Chapters 1 through 4 in this Code covering the installation of that equipment in bathrooms.", + "displayTitle": "680.72 Other Electrical Equipment", + "children": [], + "url": "https://2023.antflix.net#680.72" + }, + { + "body": "Hydromassage bathtub electrical equipment shall be accessible without damaging the building structure or building finish. Where the hydromassage bathtub is cord- and plug-connected with the supply receptacle accessible only through a service access opening, the receptacle shall be installed so that its face is within direct view and not more than 300 mm (1 ft) of the opening.", + "displayTitle": "680.73 Accessibility", + "children": [], + "url": "https://2023.antflix.net#680.73" + }, + { + "displayTitle": "680.74 Bonding", + "children": [ + { + "body": "The following parts shall be bonded together: All metal fittings within or attached to the tub structure that are in contact with the circulating waterMetal parts of electrical equipment associated with the tub water circulating system, including pump and blower motorsMetal-sheathed cables, metal raceways, and metal piping within 1.5 m (5 ft) of the inside walls of the tub and not separated from the tub by a permanent barrierAll exposed metal surfaces that are within 1.5 m (5 ft) of the inside walls of the tub and not separated from the tub area by a permanent barrierNon-current-carrying metal parts of electrical devices and controls that are not associated with the hydromassage tubs within 1.5 m (5 ft) from such unitsException No. 1: Small conductive surfaces not likely to become energized, such as air and water jets, supply valve assemblies, and drain fittings not connected to metallic piping, and towel bars, mirror frames, and similar nonelectrical equipment not connected to metal framing shall not be required to be bonded.Exception No. 2: Double-insulated motors and blowers shall not be bonded.Exception No. 3: Small conductive surfaces of electrical equipment not likely to become energized, such as the mounting strap or yoke of a listed light switch or receptacle that is grounded, shall not be required to be bonded.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#680.74_(A)" + }, + { + "body": "All metal parts required to be bonded by this section shall be bonded together using a solid copper bonding jumper, insulated, covered, or bare, not smaller than 8 AWG. The bonding jumper(s) shall be required for equipotential bonding in the area of the hydromassage bathtub and shall not be required to be extended or attached to any remote panelboard, service equipment, or any electrode. In all installations a bonding jumper long enough to terminate on a replacement non-double-insulated pump or blower motor shall be provided and shall be terminated to the equipment grounding conductor of the branch circuit of the motor when a double-insulated circulating pump or blower motor is used.", + "displayTitle": "(B) Bonding Conductor", + "children": [], + "url": "https://2023.antflix.net#680.74_(B)" + } + ], + "url": "https://2023.antflix.net#680.74" + }, + { + "displayTitle": "Part VIII Electrically Powered Pool Lifts", + "children": [], + "url": "https://2023.antflix.net#divider_5_VIII" + }, + { + "body": "Electrically powered pool lifts as defined in Article 100 shall comply with Part VIII of this article. Part VIII shall not be subject to the requirements of other parts of this article except where the requirements are specifically referenced.", + "displayTitle": "680.80 General", + "children": [], + "url": "https://2023.antflix.net#680.80" + }, + { + "body": "Lifts shall be listed, labeled, and identified for swimming pool and spa use. Exception No. 1: Lifts where the battery is removed for charging at another location and the battery is rated less than or equal to the low-voltage contact limit shall not be required to be listed or labeled. Exception No. 2: Solar-operated or solar-recharged lifts where the solar panel is attached to the lift and the battery is rated less than or equal to 24 volts shall not be required to be listed or labeled. Exception No. 3: Lifts that are supplied from a source not exceeding the low-voltage contact limit and supplied by listed transformers or power supplies that comply with 680.23(A)(2) shall not be required to be listed or labeled.", + "displayTitle": "680.81 Equipment Approval", + "children": [], + "url": "https://2023.antflix.net#680.81" + }, + { + "body": "Pool lifts connected to premises wiring and operated above the low-voltage contact limit shall be provided with GFCI protection and comply with 680.5.", + "displayTitle": "680.82 Protection", + "children": [], + "url": "https://2023.antflix.net#680.82" + }, + { + "body": "Lifts shall be bonded in accordance with 680.26(B)(5) and (B)(7) using solid copper conductors, insulated, covered, or bare, not smaller than 8 AWG. Connections to bonded parts shall be made in accordance with 250.8. An 8 AWG or larger solid copper bonding conductor provided to reduce voltage gradients in the pool lift area shall not be required to be extended or attached to remote panelboards, service equipment, or electrodes.", + "displayTitle": "680.83 Equipotential Bonding", + "children": [], + "url": "https://2023.antflix.net#680.83" + }, + { + "body": "Switches and switching devices that are operated above the low-voltage contact limit shall comply with 680.22(C). Receptacles for electrically powered pool lifts that are operated above the low-voltage contact limit shall comply with 680.22(A)(3) and (A)(4).", + "displayTitle": "680.84 Switching Devices and Receptacles", + "children": [], + "url": "https://2023.antflix.net#680.84" + }, + { + "body": "Electrically powered pool lifts shall be provided with a nameplate giving the identifying name and model and rating in volts and amperes, or in volts and watts. If the lift is to be used on a specific frequency or frequencies, it shall be so marked. Battery-powered pool lifts shall indicate the type reference of the battery or battery pack to be used. Batteries and battery packs shall be provided with a battery type reference and voltage rating. Exception: Nameplate ratings for battery-powered pool lifts shall only need to provide a rating in volts in addition to the identifying name and model.", + "displayTitle": "680.85 Nameplate Marking", + "children": [], + "url": "https://2023.antflix.net#680.85" + } + ], + "url": "https://2023.antflix.net#680" + }, + { + "displayTitle": "Article 682 Natural and Artificially Made Bodies of Water", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_102_I" + }, + { + "body": "This article applies to the installation of electrical wiring for, and equipment in and adjacent to, natural or artificially made bodies of water not covered by other articles in this Code, such as, but not limited to, aeration ponds, fish farm ponds, storm retention basins, treatment ponds, and irrigation (channels) facilities.", + "displayTitle": "682.1 Scope", + "children": [], + "url": "https://2023.antflix.net#682.1" + }, + { + "body": "If the water is subject to boat traffic, the wiring shall comply with 555.34(B).", + "displayTitle": "682.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#682.3" + }, + { + "body": "This article shall not apply in industrial applications where there is alarm indication of equipment faults and the following conditions are in place: Conditions of maintenance and supervision ensure that only qualified persons service and operate the installed systems.Continued circuit operation is necessary for safe operation of equipment or processes.", + "displayTitle": "682.4 Industrial Application", + "children": [], + "url": "https://2023.antflix.net#682.4" + }, + { + "body": "The electrical datum plane shall consist of one of the following: In land areas subject to tidal fluctuation, the electrical datum plane shall be a horizontal plane 600 mm (2 ft) above the highest tide level for the area occurring under normal circumstances, that is, highest high tide.In land areas not subject to tidal fluctuation, the electrical datum plane shall be a horizontal plane 600 mm (2 ft) above the highest water level for the area occurring under normal circumstances.In land areas subject to flooding, the electrical datum plane based on (1) or (2) above shall be a horizontal plane 600 mm (2 ft) above the point identified as the prevailing high water mark or an equivalent benchmark based on seasonal or storm-driven flooding from the authority having jurisdiction.The electrical datum plane for floating structures and landing stages that are (a) installed to permit rise and fall response to water level, without lateral movement, and (b) that are so equipped that they can rise to the datum plane established for (1) or (2) above, shall be a horizontal plane 750 mm (30 in.) above the water level at the floating structure or landing stage and a minimum of 300 mm (12 in.) above the level of the deck.", + "displayTitle": "682.5 Electrical Datum Plane Distances", + "children": [], + "url": "https://2023.antflix.net#682.5" + }, + { + "displayTitle": "Part II Installation", + "children": [], + "url": "https://2023.antflix.net#divider_102_II" + }, + { + "body": "Electrical equipment and transformers, including their enclosures, shall be specifically approved for the intended location. No portion of an enclosure for electrical equipment not identified for operation while submerged shall be located below the electrical datum plane.", + "displayTitle": "682.10 Electrical Equipment and Transformers", + "children": [], + "url": "https://2023.antflix.net#682.10" + }, + { + "body": "On land, the equipment serving feeders shall comply with one of the following: Be located no closer than 1.5 m (5 ft) horizontally from the shoreline, and live parts of the equipment are elevated a minimum of 300 mm (12 in.) above the electrical datum planeBe located no closer than the shoreline, and live parts of the equipment are located a minimum of 3 m (10 ft) above the electrical datum plane", + "displayTitle": "682.11 Location of Electrical Distribution Equipment", + "children": [], + "url": "https://2023.antflix.net#682.11" + }, + { + "body": "Electrical connections shall comply with 682.12(A) or (B).", + "displayTitle": "682.12 Electrical Connections", + "children": [ + { + "body": "All electrical connections not intended for operation while submerged shall be located at least 300 mm (12 in.) above the deck of a floating or fixed structure but not below the electrical datum plane on fixed structures. Conductor splices, within junction boxes identified for wet locations, using sealed wire connector systems listed and identified for submersion shall be required for floating structures where located above the waterline but below the electrical datum plane.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#682.12_(A)" + }, + { + "body": "Replacement electrical connections located below the electrical datum plane shall be identified for submersion.", + "displayTitle": "(B) Replacements", + "children": [], + "url": "https://2023.antflix.net#682.12_(B)" + } + ], + "url": "https://2023.antflix.net#682.12" + }, + { + "body": "Wiring methods and installation shall comply with 682.13(A) through (C).", + "displayTitle": "682.13 Wiring Methods and Installation", + "children": [ + { + "body": "Wiring methods suitable for use in wet locations that include an insulated equipment grounding conductor shall be permitted.", + "displayTitle": "(A) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#682.13_(A)" + }, + { + "body": "Extra-hard usage portable power cables that contain an insulated equipment grounding conductor rated not less than 75\u00b0C (167\u00b0F) and 600 volts shall be permitted as follows: As permanent wiring on the underside of piers (floating or fixed)Where flexibility is necessary as on piers composed of floating sections", + "displayTitle": "(B) Portable Power Cables", + "children": [], + "url": "https://2023.antflix.net#682.13_(B)" + }, + { + "body": "Submersible or floating equipment shall be cord-and plug-connected, using extra-hard usage cord, as designated in Table 400.4 and listed with a \"W\" suffix.", + "displayTitle": "(C) Submersible or Floating Equipment Power Connection(s)", + "children": [], + "url": "https://2023.antflix.net#682.13_(C)" + } + ], + "url": "https://2023.antflix.net#682.13" + }, + { + "body": "A disconnecting means shall be provided to isolate each submersible or floating electrical equipment from its supply connection(s) without requiring the plug to be removed from the receptacle. Plug and receptacle combinations shall be arranged to be suitable for the location while in use. Exception: Equipment listed for direct connection and equipment anchored in place and incapable of routine movement caused by water currents or wind shall be permitted to be connected using wiring methods covered in 682.13.", + "displayTitle": "682.14 Disconnecting Means", + "children": [ + { + "body": "The disconnecting means shall consist of a circuit breaker, a switch, or both, and shall be specifically marked to designate which receptacle or other outlet it controls.", + "displayTitle": "(A) Type and Marking", + "children": [], + "url": "https://2023.antflix.net#682.14_(A)" + }, + { + "body": "The disconnecting means shall be readily accessible on land, located not more than 750 mm (30 in.) from the receptacle it controls, and shall be located in the supply circuit ahead of the receptacle. The disconnecting means shall be located within sight of but not closer than 1.5 m (5 ft) from the shoreline and shall be elevated not less than 300 mm (12 in.) above the datum plane.", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#682.14_(B)" + } + ], + "url": "https://2023.antflix.net#682.14" + }, + { + "body": "The GFCI requirements in this article, unless otherwise noted, shall be in addition to the requirements in 210.8. Ground-fault protective devices shall be listed and provided in accordance with 682.15(A) and (B). The protective device shall be located not less than 300 mm (12 in.) above the established electrical datum plane.", + "displayTitle": "682.15 Ground-Fault Protection", + "children": [ + { + "body": "Outlets supplied by branch circuits not exceeding 150 volts to ground and 60 amperes, single-phase, shall be provided with ground-fault circuit-interrupter protection for personnel.", + "displayTitle": "(A) Outlets", + "children": [], + "url": "https://2023.antflix.net#682.15_(A)" + }, + { + "body": "Feeder and branch-circuit conductors that are installed on piers shall be provided with ground-fault protection not exceeding 30 mA. Coordination with downstream ground-fault protection shall be permitted at the feeder overcurrent protective device. Exception No. 1: Transformer secondary conductors of a separately derived ac system, operating at voltages exceeding 15 volts ac, that do not exceed 3 m (10 ft) and are installed in a raceway shall be permitted to be installed without ground-fault protection. This exception shall also apply to the supply terminals of the equipment supplied by the transformer secondary conductors. Exception No. 2: Low-voltage circuits not requiring grounding, not exceeding the low-voltage contact limit as defined in Article 100, and supplied by listed transformers or power supplies that comply with 680.23(A)(2) shall be permitted to be installed without ground-fault protection.", + "displayTitle": "(B) Feeder and Branch Circuits on Piers", + "children": [], + "url": "https://2023.antflix.net#682.15_(B)" + } + ], + "url": "https://2023.antflix.net#682.15" + }, + { + "displayTitle": "Part III Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#divider_89_III" + }, + { + "body": "Wiring and equipment within the scope of this article shall be grounded as specified in 555.37, 555.54, and the requirements in Part III of this article.", + "displayTitle": "682.30 Grounding", + "children": [], + "url": "https://2023.antflix.net#682.30" + }, + { + "displayTitle": "682.31 Equipment Grounding Conductors", + "children": [ + { + "body": "The following shall be connected to an equipment grounding conductor run with the circuit conductors in the same raceway, cable, or trench: Metal boxes, metal cabinets, and all other metal enclosuresMetal frames of utilization equipmentGrounding terminals of grounding-type receptacles", + "displayTitle": "(A) Equipment to Be Connected to Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#682.31_(A)" + }, + { + "body": "Equipment grounding conductors shall be insulated copper conductors sized in accordance with 250.122 but not smaller than 12 AWG.", + "displayTitle": "(B) Type", + "children": [], + "url": "https://2023.antflix.net#682.31_(B)" + }, + { + "body": "Where a feeder supplies a remote panelboard or other distribution equipment, an insulated equipment grounding conductor shall extend from a grounding terminal in the service to a grounding terminal and busbar in the remote panelboard or other distribution equipment.", + "displayTitle": "(C) Feeders", + "children": [], + "url": "https://2023.antflix.net#682.31_(C)" + }, + { + "body": "The insulated equipment grounding conductor for branch circuits shall terminate at a grounding terminal in a remote panelboard or other distribution equipment or the grounding terminal in the main service equipment.", + "displayTitle": "(D) Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#682.31_(D)" + }, + { + "body": "Unless double insulated, cord-and-plug-connected appliances shall be grounded by means of an equipment grounding conductor in the cord and a grounding-type attachment plug. Exception: An equipment grounding conductor shall be permitted to be uninsulated if the EGC is part of a listed cable assembly identified for the environment and not subject to environments such as, but not limited to, storm water basins, sewage treatment ponds, and natural bodies of water containing salt.", + "displayTitle": "(E) Cord-and-Plug-Connected Appliances", + "children": [], + "url": "https://2023.antflix.net#682.31_(E)" + } + ], + "url": "https://2023.antflix.net#682.31" + }, + { + "body": "All metal parts in contact with the water, all metal piping, tanks, and all non-current-carrying metal parts that are likely to become energized shall be bonded to the grounding terminal in the distribution equipment.", + "displayTitle": "682.32 Bonding of Non-Current-Carrying Metal Parts", + "children": [], + "url": "https://2023.antflix.net#682.32" + }, + { + "body": "An equipotential plane shall be installed where required in this section to mitigate step and touch voltages at electrical equipment.", + "displayTitle": "682.33 Equipotential Planes and Bonding of Equipotential Planes", + "children": [ + { + "body": "Equipotential planes shall be installed adjacent to all outdoor service equipment or disconnecting means that control equipment in or on water, that have a metallic enclosure and controls accessible to personnel, and that are likely to become energized. The equipotential plane shall encompass the area around the equipment and shall extend from the area directly below the equipment out not less than 900 mm (36 in.) in all directions from which a person would be able to stand and come in contact with the equipment.", + "displayTitle": "(A) Areas Requiring Equipotential Planes", + "children": [], + "url": "https://2023.antflix.net#682.33_(A)" + }, + { + "body": "Equipotential planes shall not be required for the controlled equipment supplied by the service equipment or disconnecting means.", + "displayTitle": "(B) Areas Not Requiring Equipotential Planes", + "children": [], + "url": "https://2023.antflix.net#682.33_(B)" + }, + { + "displayTitle": "(C) Bonding", + "children": [ + { + "body": "The parts specified in 682.33(C)(1) through (C)(3) shall be bonded together and to the electrical grounding system. Bonding conductors shall be solid copper, insulated, covered or bare, and not smaller than 8 AWG. Connections shall be made by exothermic welding or by listed pressure connectors or clamps that are labeled as being suitable for the purpose and are of stainless steel, brass, copper, or copper alloy.", + "displayTitle": "(1) Bonded Parts", + "children": [], + "url": "https://2023.antflix.net#682.33_(C)_(1)" + }, + { + "body": "Outdoor service equipment or disconnecting means that control equipment in or on water, that have a metallic enclosure and controls accessible to personnel, and that are likely to become energized shall be bonded to the equipotential plane.", + "displayTitle": "(2) Outdoor Service Equipment and Disconnects", + "children": [], + "url": "https://2023.antflix.net#682.33_(C)_(2)" + }, + { + "body": "Surfaces directly below the equipment specified in 682.33(C)(2) but not less than 900 mm (36 in.) in all directions from the equipment from which a person would be able to stand and come in contact with the equipment shall be bonded to the equipotential plane. Bonding to this surface shall be wire mesh or other conductive elements on, embedded in, or placed under the walk surface within 75 mm (3 in.).", + "displayTitle": "(3) Walking Surfaces", + "children": [], + "url": "https://2023.antflix.net#682.33_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#682.33_(C)" + } + ], + "url": "https://2023.antflix.net#682.33" + } + ], + "url": "https://2023.antflix.net#682" + }, + { + "displayTitle": "Article 685 Integrated Electrical Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_103_I" + }, + { + "body": "This article covers integrated electrical systems, other than unit equipment, in which orderly shutdown is necessary to ensure safe operation. An integrated electrical system as used in this article is a unitized segment of an industrial wiring system where all of the following conditions are met: An orderly shutdown is required to minimize personnel hazard and equipment damage.The conditions of maintenance and supervision ensure that qualified persons service the system. The name(s) of the qualified person(s) shall be kept in a permanent record at the office of the establishment in charge of the completed installation.A person designated as a qualified person shall possess the skills and knowledge related to the construction and operation of the electrical equipment and installation and shall have received documented safety training on the hazards involved. Documentation of their qualifications shall be on file with the office of the establishment in charge of the completed installation.Effective safeguards approved by the authority having jurisdiction are established and maintained.", + "displayTitle": "685.1 Scope", + "children": [], + "url": "https://2023.antflix.net#685.1" + }, + { + "body": "The articles/sections in Table 685.3 apply to particular cases of installation of conductors and equipment, where there are orderly shutdown requirements that are in addition to those of this article or are modifications of them. Table 685.3 Application of Other Articles Conductor/Equipment Section More than one building or other structure 225, Part II Ground-fault protection of equipment 230.95, Exception Protection of conductors 240.4 Electrical system coordination 240.12 Ground-fault protection of equipment 240.13(1) Grounding ac systems of 50 volts to less than 1000 volts 250.21 Equipment protection 427.22 Orderly shutdown 430.44 Disconnection 430.75, Exception Nos. 1 and 2 Disconnecting means in sight from controller 430.102(A), Exception No. 2 Energy from more than one source 430.113. Exception Nos. 1 and 2 Disconnecting means 645.10, Exception Uninterruptible power supplies (UPS) 645.11(1) Point of connection 705.12 ", + "displayTitle": "685.3 Application of Other Articles", + "children": [], + "url": "https://2023.antflix.net#685.3" + }, + { + "displayTitle": "Part II Orderly Shutdown", + "children": [], + "url": "https://2023.antflix.net#divider_103_II" + }, + { + "body": "Location of overcurrent devices that are critical to integrated electrical systems shall be permitted to be accessible, with mounting heights permitted to ensure security from operation by unqualified personnel.", + "displayTitle": "685.10 Location of Overcurrent Devices in or on Premises", + "children": [], + "url": "https://2023.antflix.net#685.10" + }, + { + "body": "Two-wire dc circuits shall be permitted to be ungrounded.", + "displayTitle": "685.12 Direct-Current System Grounding", + "children": [], + "url": "https://2023.antflix.net#685.12" + }, + { + "body": "Where operational continuity is required, control circuits of 150 volts or less from separately derived systems shall be permitted to be ungrounded.", + "displayTitle": "685.14 Ungrounded Control Circuits", + "children": [], + "url": "https://2023.antflix.net#685.14" + } + ], + "url": "https://2023.antflix.net#685" + }, + { + "displayTitle": "Article 690 Solar Photovoltaic (PV) Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_104_I" + }, + { + "body": "This article applies to solar PV systems, other than those covered by Article 691, including the array circuit(s), inverter(s), and controller(s) for such systems. The systems covered by this article include those interactive with other electric power production sources or stand-alone, or both. These PV systems may have ac or dc output for utilization. Informational Note No. 1: See Informational Note Figure 690.1. Informational Note No. 2: Article 691 covers the installation of large-scale PV electric supply stations. Informational Note Figure 690.1 Illustration of PV System DC Circuits and PV System Components in a Typical PV Installation.", + "displayTitle": "690.1 Scope", + "children": [], + "url": "https://2023.antflix.net#690.1" + }, + { + "displayTitle": "690.4 General Requirements", + "children": [ + { + "body": "PV systems shall be permitted to supply a building or other structure in addition to any other electrical supply system(s).", + "displayTitle": "(A) PV Systems", + "children": [], + "url": "https://2023.antflix.net#690.4_(A)" + }, + { + "body": "Electronic power converters, motor generators, PV modules, ac modules and ac module systems, dc combiners, PV rapid shutdown equipment (PVRSE), PV hazard control equipment (PVHCE), PV hazard control systems (PVHCS), dc circuit controllers, and charge controllers intended for use in PV systems shall be listed or be evaluated for the application and have a field label applied.", + "displayTitle": "(B) Equipment", + "children": [], + "url": "https://2023.antflix.net#690.4_(B)" + }, + { + "body": "The installation of equipment, associated wiring, and interconnections shall be performed only by qualified persons.", + "displayTitle": "(C) Qualified Personnel", + "children": [], + "url": "https://2023.antflix.net#690.4_(C)" + }, + { + "body": "Multiple PV systems shall be permitted to be installed in or on a single building or structure. Where the PV systems are remotely located from each other, a directory in accordance with 705.10 shall be provided at each PV system disconnecting means.", + "displayTitle": "(D) Multiple PV Systems", + "children": [], + "url": "https://2023.antflix.net#690.4_(D)" + }, + { + "body": "PV system equipment and disconnecting means shall not be installed in bathrooms.", + "displayTitle": "(E) Locations Not Permitted", + "children": [], + "url": "https://2023.antflix.net#690.4_(E)" + }, + { + "body": "Electronic power converters and their associated devices shall be permitted to be mounted on roofs or other areas that are not readily accessible. Disconnecting means shall be installed in accordance with 690.15.", + "displayTitle": "(F) Electronic Power Converters Mounted in Not Readily Accessible Locations", + "children": [], + "url": "https://2023.antflix.net#690.4_(F)" + }, + { + "body": "PV equipment floating on or attached to structures floating on bodies of water shall be identified as being suitable for the purpose and shall utilize wiring methods that allow for any expected movement of the equipment. Informational Note: PV equipment in these installations are often subject to increased levels of humidity, corrosion, and mechanical and structural stresses. Expected movement of floating PV arrays is often included in the structural design.", + "displayTitle": "(G) PV Equipment Floating on Bodies of Water", + "children": [], + "url": "https://2023.antflix.net#690.4_(G)" + } + ], + "url": "https://2023.antflix.net#690.4" + }, + { + "displayTitle": "690.6 Alternating-Current (AC) Modules and Systems", + "children": [ + { + "body": "The requirements of Article 690 pertaining to PV source circuits shall not apply to ac modules or ac module systems. The PV source circuit, conductors, and inverters shall be considered as internal components of an ac module or ac module system.", + "displayTitle": "(A) Photovoltaic Source Circuits", + "children": [], + "url": "https://2023.antflix.net#690.6_(A)" + }, + { + "body": "The output of an ac module or ac module system shall be considered an inverter output circuit.", + "displayTitle": "(B) Output Circuit", + "children": [], + "url": "https://2023.antflix.net#690.6_(B)" + } + ], + "url": "https://2023.antflix.net#690.6" + }, + { + "displayTitle": "Part II Circuit Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_104_II" + }, + { + "body": "The maximum voltage shall be used to determine the voltage and voltage to ground of circuits in the application of this Code. Maximum voltage shall be used for conductors, cables, equipment, working space, and other applications where voltage limits and ratings are used. The maximum voltage of PV system dc circuits shall be the highest voltage between any two conductors of a circuit or any conductor and ground and shall comply with the following: PV system dc circuits shall not exceed 1000 volts within or originating from arrays located on or attached to buildings and PV system dc circuits inside buildings.PV system dc circuits shall not exceed 600 volts on or in one- and two-family dwellings.PV system dc circuits exceeding 1000 volts shall comply with 690.31(G).", + "displayTitle": "690.7 Maximum Voltage", + "children": [ + { + "body": "The maximum dc voltage for a PV source circuit shall be calculated in accordance with one of the following methods: The sum of the PV module-rated open-circuit voltage of the series-connected modules in the PV string circuit corrected for the lowest expected ambient temperature using the open-circuit voltage temperature coefficients in accordance with the instructions included in the listing or labeling of the moduleFor crystalline and multicrystalline silicon modules, the sum of the PV module-rated open-circuit voltage of the series-connected modules in the PV string circuit corrected for the lowest expected ambient temperature using the correction factors provided in Table 690.7(A)For PV systems with an inverter generating capacity of 100 kW or greater, a documented and stamped PV system design, using an industry standard method maximum voltage calculation provided by a licensed professional electrical engineerInformational Note No. 1: One source for lowest-expected, ambient temperature design data for various locations the chapter titled \"Extreme Annual Mean Minimum Design Dry Bulb Temperature\" found in the ASHRAE Handbook - Fundamentals, 2017. These temperature data can be used to calculate maximum voltage.Informational Note No. 2: See SAND 2004-3535, Photovoltaic Array Performance Model, for one industry standard method for calculating maximum voltage of a PV system.", + "displayTitle": "(A) Photovoltaic Source Circuits", + "children": [], + "url": "https://2023.antflix.net#690.7_(A)" + }, + { + "body": "In PV dc-to-dc converter circuits, the maximum voltage shall be calculated in accordance with 690.7(B)(1) or (B)(2).", + "displayTitle": "(B) DC-to-DC Converter Circuits", + "children": [ + { + "body": "For circuits connected to the output of a single dc-to-dc converter, the maximum voltage shall be determined in accordance with the instructions included in the listing or labeling of the dc-to-dc converter. If the instructions do not provide a method to determine the maximum voltage, the maximum voltage shall be the maximum rated voltage output of the dc-to-dc converter.", + "displayTitle": "(1) Single DC-to-DC Converter", + "children": [], + "url": "https://2023.antflix.net#690.7_(B)_(1)" + }, + { + "body": "For circuits connected to the output of two or more series-connected dc-to-dc converters, the maximum voltage shall be determined in accordance with the instructions included in the listing or labeling of the dc-to-dc converter. If the instructions do not provide a method to determine the maximum voltage, the maximum voltage shall be the sum of the maximum rated voltage output of the dc-to-dc converters in series.", + "displayTitle": "(2) Two or More Series-Connected DC-to-DC Converters", + "children": [], + "url": "https://2023.antflix.net#690.7_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#690.7_(B)" + }, + { + "body": "For monopole subarrays in bipolar systems, the maximum voltage shall be the highest voltage between the monopole circuit conductors where one conductor of the monopole circuit is connected to the functionally grounded reference. To prevent overvoltage in the event of a ground fault or arc fault, the monopole circuits shall be isolated from ground.", + "displayTitle": "(C) Bipolar PV Source Circuits", + "children": [], + "url": "https://2023.antflix.net#690.7_(C)" + }, + { + "body": "A permanent readily visible label indicating the highest maximum dc voltage in a PV system, calculated in accordance with 690.7, shall be provided by the installer at one of the following locations: DC PV system disconnecting meansPV system electronic power conversion equipmentDistribution equipment associated with the PV systemTable 690.7(A) Voltage Correction Factors for Crystalline and Multicrystalline Silicon Modules Correction Factors for Ambient Temperatures Below 25\u00b0C (77\u00b0F). (Multiply the rated open-circuit voltage by the appropriate correction factor shown below.) Ambient Temperature (\u00b0C) Factor Ambient Temperature (\u00b0F) 24 to 20 1.02 76 to 68 19 to 15 1.04 67 to 59 14 to 10 1.06 58 to 50 9 to 5 1.08 49 to 41 4 to 0 1.10 40 to 32 \u20141 to \u20145 1.12 31 to 23 \u20146 to\u201410 1.14 22 to 14 \u201411 to \u201415 1.16 13 to 5 \u201416 to \u201420 1.18 4 to \u20144 \u201421 to \u201425 1.20 \u20145 to \u201413 \u201426 to \u201430 1.21 \u201414 to \u201422 \u201431 to \u201435 1.23 \u201423 to \u201431 \u201436 to \u201440 1.25 \u201432 to \u201440 ", + "displayTitle": "(D) Marking DC PV Circuits", + "children": [], + "url": "https://2023.antflix.net#690.7_(D)" + } + ], + "url": "https://2023.antflix.net#690.7" + }, + { + "displayTitle": "690.8 Circuit Sizing and Current", + "children": [ + { + "body": "The maximum current for the specific circuit shall be calculated in accordance with one of the methods in 690.8(A)(1) or (A)(2).", + "displayTitle": "(A) Calculation of Maximum Circuit Current", + "children": [ + { + "body": "The maximum current shall be calculated in accordance with 690.8(A)(1)(a) through (A)(1)(c). Photovoltaic Source Circuit Currents The maximum current shall be as calculated in either of the following:The maximum current shall be the sum of the short-circuit current ratings of the PV modules connected in parallel multiplied by 125 percent.For PV systems with an inverter generating capacity of 100 kW or greater, a documented and stamped PV system design, using an industry standard method maximum current calculation provided by a licensed professional electrical engineer, shall be permitted. The calculated maximum current value shall be based on the highest 3-hour current average resulting from the simulated local irradiance on the PV array accounting for elevation and orientation. The current value used by this method shall not be less than 70 percent of the value calculated using 690.8(A)(1)(a)(1).Informational Note: See SAND 2004-3535, Photovoltaic Array Performance Model, for one industry standard method for calculating maximum current of a PV system. This model is used by the System Advisor Model simulation program provided by the National Renewable Energy Laboratory.PV DC-to-DC Converter Circuit Current. The maximum current shall be the sum of parallel connected dc-to-dc converter continuous output current ratings.Inverter Output Circuit Current. The maximum current shall be the inverter continuous output current rating.Informational Note: Modules that can produce electricity when exposed to light on multiple surfaces are labeled with applicable short-circuit currents. Additional guidance is provided in the instructions included with the listing.", + "displayTitle": "(1) PV System Circuits", + "children": [], + "url": "https://2023.antflix.net#690.8_(A)_(1)" + }, + { + "body": "Where a circuit is protected with an overcurrent device not exceeding the conductor ampacity, the maximum current shall be permitted to be the rated input current of the electronic power converter input to which it is connected.", + "displayTitle": "(2) Circuits Connected to the Input of Electronic Power Converters", + "children": [], + "url": "https://2023.antflix.net#690.8_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#690.8_(A)" + }, + { + "body": "Circuit conductors shall have an ampacity not less than the larger of 690.8(B)(1) or (B)(2).", + "displayTitle": "(B) Conductor Ampacity", + "children": [ + { + "body": "The minimum conductor size with an ampacity not less than the maximum currents calculated in 690.8(A) multiplied by 125 percent. Exception: Circuits containing an assembly, together with its overcurrent device(s), that is listed for continuous operation at 100 percent of its rating shall be permitted to be used at 100 percent of its rating.", + "displayTitle": "(1) Without Adjustment and Correction Factors", + "children": [], + "url": "https://2023.antflix.net#690.8_(B)_(1)" + }, + { + "body": "The maximum currents calculated in 690.8(A) with adjustment and correction factors.", + "displayTitle": "(2) With Adjustment and Correction Factors", + "children": [], + "url": "https://2023.antflix.net#690.8_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#690.8_(B)" + }, + { + "body": "For a PV power source that has multiple output circuit voltages and employs a common-return conductor, the ampacity of the common-return conductor shall not be less than the sum of the ampere ratings of the overcurrent devices of the individual output circuits.", + "displayTitle": "(C) Systems With Multiple Direct-Current Voltages", + "children": [], + "url": "https://2023.antflix.net#690.8_(C)" + }, + { + "body": "Where an overcurrent device is used to protect more than one set of parallel-connected PV string circuits, the ampacity of each conductor protected by the device shall not be less than the sum of the following: The rating of the overcurrent deviceThe sum of the maximum currents as calculated in 690.8(A)(1)(a) for the other parallel-connected PV string circuits protected by the overcurrent device", + "displayTitle": "(D) Multiple PV String Circuits", + "children": [], + "url": "https://2023.antflix.net#690.8_(D)" + } + ], + "url": "https://2023.antflix.net#690.8" + }, + { + "displayTitle": "690.9 Overcurrent Protection", + "children": [ + { + "body": "PV system dc circuit and inverter output conductors and equipment shall be protected against overcurrent. Circuits sized in accordance with 690.8(A)(2) are required to be protected against overcurrent with overcurrent protective devices. Each circuit shall be protected from overcurrent in accordance with 690.9(A)(1), (A)(2), or (A)(3).", + "displayTitle": "(A) Circuits and Equipment", + "children": [ + { + "body": "Overcurrent protective devices shall not be required where both of the following conditions are met: The conductors have sufficient ampacity for the maximum circuit current.The currents from all sources do not exceed the maximum overcurrent protective device rating specified for the PV module or electronic power converter.", + "displayTitle": "(1) Circuits Where Overcurrent Protection Not Required", + "children": [], + "url": "https://2023.antflix.net#690.9_(A)_(1)" + }, + { + "body": "A circuit conductor connected at one end to a current-limited supply, where the conductor is rated for the maximum circuit current from that supply, and also connected to sources having an available maximum circuit current greater than the ampacity of the conductor, shall be protected from overcurrent at the point of connection to the higher current source. Informational Note: Photovoltaic system dc circuits and electronic power converter outputs powered by these circuits are current-limited and in some cases do not need overcurrent protection. Where these circuits are connected to higher current sources, such as parallel-connected PV system dc circuits, energy storage systems, or a utility service, the overcurrent device is often installed at the higher current source end of the circuit conductor.", + "displayTitle": "(2) Circuits Where Overcurrent Protection Is Required on One End", + "children": [], + "url": "https://2023.antflix.net#690.9_(A)_(2)" + }, + { + "body": "Circuits that do not comply with 690.9(A)(1) or (A)(2) shall be protected with one of the following methods: Conductors not greater than 3 m (10 ft) in length and not in buildings, protected from overcurrent on one endConductors not greater than 3 m (10 ft) in length and in buildings, protected from overcurrent on one end and in a raceway or metal clad cableConductors protected from overcurrent on both endsConductors not installed on or in buildings are permitted to be protected from overcurrent on one end of the circuit where the circuit complies with all of the following conditions:The conductors are installed in metal raceways or metal-clad cables, or installed in enclosed metal cable trays, or underground, or where directly entering pad-mounted enclosures.The conductors for each circuit terminate on one end at a single circuit breaker or a single set of fuses that limit the current to the ampacity of the conductors.The overcurrent device for the conductors is an integral part of a disconnecting means or shall be located within 3 m (10 ft) of conductor length of the disconnecting means.The disconnecting means for the conductors is installed outside of a building, or at a readily accessible location nearest the point of entrance of the conductors inside of a building, including installations complying with 230.6.", + "displayTitle": "(3) Other Circuits", + "children": [], + "url": "https://2023.antflix.net#690.9_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#690.9_(A)" + }, + { + "body": "Overcurrent devices used in PV source circuits shall be listed for use in PV systems. Electronic devices that are listed to prevent backfeed current in PV system dc circuits shall be permitted to prevent overcurrent of conductors on the PV array side of the device. Overcurrent devices, where required, shall be rated in accordance with one of the following and permitted to be rounded up to the next higher standard size in accordance with 240.4(B): Overcurrent devices shall be rated not less than 125 percent of the maximum currents calculated in 690.8(A).An assembly, together with its overcurrent device(s), that is listed for continuous operation at 100 percent of its rating shall be permitted to be used at 100 percent of its rating.Informational Note: Some electronic devices prevent backfeed current, which in some cases is the only source of overcurrent in PV system dc circuits.", + "displayTitle": "(B) Device Ratings", + "children": [], + "url": "https://2023.antflix.net#690.9_(B)" + }, + { + "body": "A single overcurrent protective device, where required, shall be permitted to protect the PV modules, dc-to-dc converters, and conductors of each circuit. Where single overcurrent protection devices are used to protect circuits, all overcurrent devices shall be placed in the same polarity for all circuits within a PV system. The overcurrent devices shall be accessible but shall not be required to be readily accessible. Informational Note: Due to improved ground-fault protection required in PV systems by 690.41(B), a single overcurrent protective device in either the positive or negative conductors of a PV system in combination with this ground-fault protection provides adequate overcurrent protection.", + "displayTitle": "(C) PV System DC Circuits", + "children": [], + "url": "https://2023.antflix.net#690.9_(C)" + }, + { + "body": "Overcurrent protection for power transformers shall be installed in accordance with 705.30(F). Exception: A power transformer with a current rating on the side connected toward the interactive inverter output, not less than the rated continuous output current of the inverter, shall be permitted without overcurrent protection from the inverter.", + "displayTitle": "(D) Transformers", + "children": [], + "url": "https://2023.antflix.net#690.9_(D)" + } + ], + "url": "https://2023.antflix.net#690.9" + }, + { + "body": "Photovoltaic systems with PV system dc circuits operating at 80 volts dc or greater between any two conductors shall be protected by a listed PV arc-fault circuit interrupter or other system components listed to provide equivalent protection. The system shall detect and interrupt arcing faults resulting from a failure in the intended continuity of a conductor, connection, module, or other system component in the PV system dc circuits. Exception: PV system dc circuits that utilize metal-clad cables, are installed in metal raceways or enclosed metal cable trays, or are underground shall be permitted without arc-fault circuit protection if the installation complies with at least one of the following: (1) The PV system dc circuits are not installed in or on buildings. (2) The PV system dc circuits are located in or on detached structures whose sole purpose is to support or contain PV system equipment.", + "displayTitle": "690.11 Arc-Fault Circuit Protection (DC)", + "children": [], + "url": "https://2023.antflix.net#690.11" + }, + { + "body": "PV system circuits installed on or in buildings shall include a rapid shutdown function to reduce shock hazard for firefighters in accordance with 690.12(A) through (D). Exception No. 1: Ground-mounted PV system circuits that enter buildings, of which the sole purpose is to house PV system equipment, shall not be required to comply with 690.12. Exception No. 2: PV equipment and circuits installed on nonenclosed detached structures including but not limited to parking shade structures, carports, solar trellises, and similar structures shall not be required to comply with 690.12. Informational Note: Exceptions for rapid shutdown are intended to be consistent with building and fire codes that have limitations as to the types of buildings on which firefighters typically perform rooftop operations.", + "displayTitle": "690.12 Rapid Shutdown of PV Systems on Buildings", + "children": [ + { + "body": "Requirements for controlled conductors shall apply to the following: PV system dc circuitsInverter output circuits originating from inverters located within the array boundaryInformational Note: The rapid shutdown function reduces the risk of electrical shock that dc circuits in a PV system could pose for firefighters. The ac output conductors from PV systems that include inverters will either be de-energized after shutdown initiation or will remain energized by other sources such as a utility service. To prevent PV arrays with attached inverters from having energized ac conductors within the PV array(s), those circuits are also specifically controlled after shutdown initiation.Exception: PV system circuits originating within or from arrays not attached to buildings that terminate on the exterior of buildings and PV system circuits installed in accordance with 230.6 shall not be considered controlled conductors for the purposes of 690.12.", + "displayTitle": "(A) Controlled Conductors", + "children": [], + "url": "https://2023.antflix.net#690.12_(A)" + }, + { + "body": "The use of the term array boundary in this section is defined as 305 mm (1 ft) from the array in all directions. Controlled conductors outside the array boundary shall comply with 690.12(B)(1) and inside the array boundary shall comply with 690.12(B)(2). Equipment and systems shall be permitted to meet the requirements of both inside and outside the array as defined by the manufacturer's instructions included with the listing.", + "displayTitle": "(B) Controlled Limits", + "children": [ + { + "body": "Controlled conductors located outside the boundary or more than 1 m (3 ft) from the point of entry inside a building shall be limited to not more than 30 volts within 30 seconds of rapid shutdown initiation. Voltage shall be measured between any two conductors and between any conductor and ground.", + "displayTitle": "(1) Outside the Array Boundary", + "children": [], + "url": "https://2023.antflix.net#690.12_(B)_(1)" + }, + { + "body": "The PV system shall comply with one of the following: The PV system shall provide shock hazard control for firefighters through the use of a PVHCS installed in accordance with the instructions included with the listing or field labeling. Where a PVHCS requires initiation to transition to a controlled state, the rapid shutdown initiation device required in 690.12(C) shall perform this initiation.Informational Note No. 1: A listed or field-labeled PVHCS is comprised of cither an individual piece of equipment that fulfills the necessary functions or multiple pieces of equipment coordinated to perform the functions as described in the installation instructions to reduce the risk of electric shock hazard within a damaged PV array for firefighters. See UL 3741, Photovoltaic Hazard Control.The PV system shall provide shock hazard control for firefighters by limiting the highest voltage inside equipment or between any two conductors of a circuit or any conductor and ground inside array boundary to not more than 80 volts within 30 seconds of rapid shutdown initiation.Informational Note No. 2: Common methods include the use of PV equipment with a limited maximum voltage of 80 volts as determined by 690.7, PVRSE, PVHCE, or any combination of these.", + "displayTitle": "(2) Inside the Array Boundary", + "children": [], + "url": "https://2023.antflix.net#690.12_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#690.12_(B)" + }, + { + "body": "Where circuits identified in 690.12(A) are required to meet the requirements in 690.12(B), an initiation device(s) shall be provided and shall initiate the rapid shutdown function. The device's \"off\" position shall indicate that the rapid shutdown function has been initiated for all PV systems connected to that device. For one-and two-family dwellings, an initiation device(s), where required, shall be located at a readily accessible outdoor location. For a single PV system, the rapid shutdown initiation shall occur by the operation of any single initiation device. Devices shall consist of at least one or more of the following:Service disconnecting meansPV system disconnecting meansReadily accessible switch that plainly indicates whether it is in the \"off\" or \"on\" positionWhere multiple PV systems are installed with rapid shutdown functions on a single service, the initiation device(s) shall consist of not more than six switches or six sets of circuit breakers, or a combination of not more than six switches and sets of circuit breakers, mounted in a single enclosure, or in a group of separate enclosures. These initiation device(s) shall initiate the rapid shutdown of all PV systems with rapid shutdown functions on that service.", + "displayTitle": "(C) Initiation Device", + "children": [], + "url": "https://2023.antflix.net#690.12_(C)" + }, + { + "body": "Buildings with PV systems shall have a permanent label located at each service equipment location to which the PV systems are connected or at an approved readily visible location and shall indicate the location of rapid shutdown initiation devices. The label shall include a simple diagram of a building with a roof and shall include the following words: SOLAR PV SYSTEM IS EQUIPPED WITH RAPID SHUTDOWN.TURN RAPID SHUTDOWN SWITCH TO THE \"OFF\" POSITION TO SHUT DOWNPV SYSTEM AND REDUCE SHOCK HAZARD IN ARRAY. The title \"SOLAR PV SYSTEM IS EQUIPPED WITH RAPID SHUTDOWN\" shall have these letters capitalized and having a minimum height of 9.5 mm (3/8 in.). All text shall be legible and contrast the background. Informational Note: See Informational Note Figure 690.12(D).", + "displayTitle": "(D) Buildings With Rapid Shutdown", + "children": [ + { + "body": "For buildings that have PV systems with more than one rapid shutdown type or PV systems with no rapid shutdown, a detailed plan view diagram of the roof shall be provided showing each different PV system with a dotted line around areas that remain energized after rapid shutdown is initiated.", + "displayTitle": "(1) Buildings With More Than One Rapid Shutdown Type", + "children": [], + "url": "https://2023.antflix.net#690.12_(D)_(1)" + }, + { + "body": "A rapid shutdown switch shall have a label that includes the following wording located on or no more than 1 m (3 ft) from the switch: RAPID SHUTDOWN SWITCH FOR SOLAR PV SYSTEM The label shall be reflective, with all letters capitalized and having a minimum height of 9.5 mm (3/8 in.) in white on red background. Informational Note Figure 690.12(D) Label for Roof-Mounted PV Systems with Rapid Shutdown.", + "displayTitle": "(2) Rapid Shutdown Switch", + "children": [], + "url": "https://2023.antflix.net#690.12_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#690.12_(D)" + } + ], + "url": "https://2023.antflix.net#690.12" + }, + { + "displayTitle": "Part III Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#divider_90_III" + }, + { + "body": "Means shall be provided to disconnect the PV system from all wiring systems including power systems, energy storage systems, and utilization equipment and its associated premises wiring.", + "displayTitle": "690.13 Photovoltaic System Disconnecting Means", + "children": [ + { + "displayTitle": "(A) Location", + "children": [ + { + "body": "The PV system disconnecting means shall be installed at a readily accessible location.", + "displayTitle": "(1) Readily Accessible", + "children": [], + "url": "https://2023.antflix.net#690.13_(A)_(1)" + }, + { + "body": "Where a disconnecting means for circuits operating above 30 volts is readily accessible to unqualified persons, an enclosure door or hinged cover that exposes energized parts when open shall have its door or cover locked or require a tool to be opened.", + "displayTitle": "(2) Enclosure Doors and Covers", + "children": [], + "url": "https://2023.antflix.net#690.13_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#690.13_(A)" + }, + { + "body": "Each PV system disconnecting means shall plainly indicate whether in the open (off) or closed (on) position and be permanently marked \"PV SYSTEM DISCONNECT\" or equivalent. Additional markings shall be permitted based upon the specific system configuration. For PV system disconnecting means where the line and load terminals may be energized in the open position, the device shall be marked with the following words or equivalent: WARNINGELECTRIC SHOCK HAZARD TERMINALS ON THE LINE AND LOAD SIDES MAY BE ENERGIZED IN THE OPEN POSITION The warning sign(s) or label(s) shall comply with 110.21 (B).", + "displayTitle": "(B) Marking", + "children": [], + "url": "https://2023.antflix.net#690.13_(B)" + }, + { + "body": "Each PV system disconnecting means shall consist of not more than six switches or six sets of circuit breakers, or a combination of not more than six switches and sets of circuit breakers, mounted in a single enclosure, or in a group of separate enclosures. A single PV system disconnecting means shall be permitted for the combined ac output of one or more inverters or ac modules. Informational Note: This requirement does not limit the number of PV systems connected to a service as permitted in 690.4(D). This requirement allows up to six disconnecting means to disconnect a single PV system. For PV systems where all power is converted through interactive inverters, a dedicated circuit breaker, in 705.12(B)(1), is an example of a single PV system disconnecting means.", + "displayTitle": "(C) Maximum Number of Disconnects", + "children": [], + "url": "https://2023.antflix.net#690.13_(C)" + }, + { + "body": "The PV system disconnecting means shall have ratings sufficient for the maximum circuit current, available fault current, and voltage that is available at the terminals of the PV system disconnect.", + "displayTitle": "(D) Ratings", + "children": [], + "url": "https://2023.antflix.net#690.13_(D)" + }, + { + "body": "The PV system disconnecting means shall simultaneously disconnect the PV system conductors that are not solidly grounded from all conductors of other wiring systems. The PV system disconnecting means or its remote operating device or the enclosure providing access to the disconnecting means shall be capable of being locked in accordance with 110.25. The PV system disconnecting means shall be one of the following: A manually operable switch or circuit breakerA connector meeting the requirements of 690.33(D)(1) or (D)(3)A pull-out switch with the required interrupting ratingA remote-controlled switch or circuit breaker that is operable locally and opens automatically when control power is interruptedA device listed or approved for the intended applicationInformational Note: Circuit breakers marked \"line\" and \"load\" may not be suitable for backfeed or reverse current.", + "displayTitle": "(E) Type of Disconnect", + "children": [], + "url": "https://2023.antflix.net#690.13_(E)" + } + ], + "url": "https://2023.antflix.net#690.13" + }, + { + "body": "Disconnecting means of the type required in 690.15(A) shall be provided to disconnect ac PV modules, fuses, dc-to-dc converters, inverters, and charge controllers from all conductors that are not solidly grounded.", + "displayTitle": "690.15 Disconnecting Means for Isolating Photovoltaic Equipment", + "children": [ + { + "body": "Where a disconnect is required to isolate equipment, the disconnecting means shall be one of the following: An equipment disconnecting means in accordance with 690.1.5(C)An isolating device as part of listed equipment where an interlock or similar means prevents the opening of the isolating device under loadFor circuits with a maximum circuit current of 30 amperes or less, an isolating device in accordance with 690.15(B)", + "displayTitle": "(A) Type of Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#690.15_(A)" + }, + { + "body": "An isolating device shall not be required to have an interrupting rating. Where an isolating device is not rated for interrupting the circuit current, it shall be marked \"Do Not Disconnect Under Load\" or \"Not for Current Interrupting.\" An isolating device shall not be required to simultaneously disconnect all current-carrying conductors of a circuit. The isolating device shall be one of the following: A mating connector meeting the requirements of 690.33 and listed and identified for use with specific equipmentA finger-safe fuse holderAn isolating device that requires a tool to place the device in the open (off) positionAn isolating device listed for the intended application", + "displayTitle": "(B) Isolating Device", + "children": [], + "url": "https://2023.antflix.net#690.15_(B)" + }, + { + "body": "Equipment disconnecting means shall comply with the following: Have ratings sufficient for the maximum circuit current, available fault current, and voltage that is available at the terminals.Simultaneously disconnect all current-carrying conductors that are not solidly grounded to the circuit to which it is connected.Be externally operable without exposing the operator to contact with energized parts and shall indicate whether in the open (off) or closed (on) position. Where not within sight or not within 3 m (10 ft) of the equipment, the disconnecting means or its remote operating device or the enclosure providing access to the disconnecting means shall be capable of being locked in accordance with 110.25.Be one of the types in 690.13(E)(1) through (E)(5).Equipment disconnecting means, other than those complying with 690.33, shall be marked in accordance with the warning in 690.13(B) if the line and load terminals can be energized in the open position.Informational Note: A common installation practice is to terminate PV source-side dc conductors in the same manner that utility source-side ac conductors are generally connected on the line side of a disconnecting means. This practice is more likely to de-energize load-side terminals, blades, and fuses when the disconnect is in the open position and no energized sources are connected to the load side of the disconnect.", + "displayTitle": "(C) Equipment Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#690.15_(C)" + }, + { + "body": "Isolating devices or equipment disconnecting means shall comply with one or more of the following: Located within the equipmentLocated in sight from and readily accessible from the equipment for those to whom access is requiredLockable in accordance with 110.25Provided with remote controls to activate the disconnecting means where the remote controls comply with one of the following:The disconnecting means and their controls are located within the same equipment.The disconnecting means is lockable in accordance with 110.25, and the location of the controls are marked on the disconnecting means.", + "displayTitle": "(D) Location and Control", + "children": [], + "url": "https://2023.antflix.net#690.15_(D)" + } + ], + "url": "https://2023.antflix.net#690.15" + }, + { + "displayTitle": "Part IV Wiring Methods and Materials", + "children": [], + "url": "https://2023.antflix.net#divider_35_IV" + }, + { + "displayTitle": "690.31 Wiring Methods", + "children": [ + { + "displayTitle": "(A) Wiring Systems", + "children": [ + { + "body": "Where wiring devices with integral enclosures are used, sufficient length of cable shall be provided to facilitate replacement.", + "displayTitle": "(1) Serviceability", + "children": [], + "url": "https://2023.antflix.net#690.31_(A)_(1)" + }, + { + "body": "Where not guarded, PV system dc circuit conductors operating at voltages greater than 30 volts that are readily accessible to unqualified persons shall be installed in Type MC cable, in multiconductor jacketed cable, or in raceway.", + "displayTitle": "(2) Where Readily Accessible", + "children": [], + "url": "https://2023.antflix.net#690.31_(A)_(2)" + }, + { + "body": "The ampacity of 105\u00b0C (221\u00b0F) and 125\u00b0C (257\u00b0F) conductors shall be permitted to be determined by Table 690.31 (A)(3)(1). For ambient temperatures greater than 30\u00b0C (86\u00b0F), the ampacities of these conductors shall be corrected in accordance with Table 690.31 (A)(3)(2).", + "displayTitle": "(3) Conductor Ampacity", + "children": [], + "url": "https://2023.antflix.net#690.31_(A)_(3)" + }, + { + "body": "In addition to wiring methods included elsewhere in this Code, other wiring systems specifically listed for use in PV systems shall be permitted. Informational Note: See 110.14(C) for conductor temperature limitations due to termination provisions. Table 690.31(A)(3)(1) Ampacities of Insulated Conductors Rated Up To and Including 2000 Volts, 105\u00b0C Through 125\u00b0C (221\u00b0F Through 257\u00b0F), Not More Than Three Current-Carrying Conductors in Raceway, Cable, or Earth (Directly Buried), Based on Ambient Temperature of 30\u00b0C (86\u00b0F) AWG Types PVC, CPE, XLPE 105\u00b0C XLPE, EPDM 125\u00b0C 18 15 16 16 19 20 14 29 31 12 36 39 10 46 50 8 64 69 6 81 87 4 109 118 3 129 139 2 143 154 1 168 181 1/0 193 208 2/0 229 247 3/0 263 284 4/0 301 325 Table 690.31 (A)(3)(2) Correction Factors Ambient Temperature (\u00b0C) Temperature Rating of Conductor Ambient Temperature (\u00b0F) 105\u00b0C (221\u00b0F) 125\u00b0C (257\u00b0F) 30 1 1 86 31\u201435 0.97 0.97 87\u201495 36\u201440 0.93 0.95 96\u2014104 41\u201445 0.89 0.92 105\u2014113 46\u201450 0.86 0.89 114\u2014122 51\u201455 0.82 0.86 123\u2014131 56\u201460 0.77 0.83 132\u2014140 61\u201465 0.73 0.79 141\u2014149 66\u201470 0.68 0.76 150\u2014158 71\u201475 0.63 0.73 159\u2014167 76\u201480 0.58 0.69 168\u2014176 81\u201485 0.52 0.65 177\u2014185 86\u201490 0.45 0.61 186\u2014194 91\u201495 0.37 0.56 195\u2014203 96\u2014100 0.26 0.51 204\u2014212 101\u2014105 - 0.46 213\u2014221 106\u2014110 - 0.4 222\u2014230 111\u2014115 - 0.32 231\u2014239 116\u2014120 - 0.23 240\u2014248 ", + "displayTitle": "(4) Special Equipment", + "children": [], + "url": "https://2023.antflix.net#690.31_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#690.31_(A)" + }, + { + "displayTitle": "(B) Identification and Grouping", + "children": [ + { + "body": "Where not otherwise allowed in an equipment's listing, PV system dc circuits shall not occupy the same equipment wiring enclosure, cable, or raceway as other non-PV systems or inverter output circuits unless separated from other circuits by a barrier or partition. Exception: Where all conductors or cables have an insulation rating equal to at least the maximum circuit voltage applied to any conductor within the same wiring method, the following shall be permitted: (1) Multiconductor jacketed cables for remote control, signaling, or power-limited circuits shall be permitted within the same wiring enclosure, cable, or raceway as PV system dc circuits where all circuits serve the PV system. (2) Inverter output circuits shall be permitted to occupy the same junction box, pull box, or wireway with PV system dc circuits that are identified and grouped as required by 690.31(B)(2) and (B)(3). (3) PV system dc circuits utilizing multiconductor jacketed cable or metal-clad cable assemblies or listed wiring harnesses identified for the application shall be permitted to occupy the same wiring method as inverter output circuits and other non-PV systems.", + "displayTitle": "(1) Conductors of Different Systems", + "children": [], + "url": "https://2023.antflix.net#690.31_(B)_(1)" + }, + { + "body": "PV system dc circuit conductors shall be identified at all termination, connection, and splice points by color coding, marking tape, tagging, or other approved means in accordance with 690.31(B)(2)(a) and (B)(2)(b). Exception: Where the identification of the conductors is evident by spacing or arrangement, further identification shall not be required.Conductors that rely on other than color coding for polarity identification-shall be identified by an approved permanent marking means such as labeling, sleeving, or shrink-tubing that is suitable for the conductor size.The permanent marking means for nonsolidly grounded positive conductors shall include imprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, or gray. The permanent marking means for nonsolidly grounded negative conductors shall include imprinted negative signs (-) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red. Only solidly grounded PV system dc circuit conductors shall be marked in accordance with 200.6.", + "displayTitle": "(2) Identification", + "children": [], + "url": "https://2023.antflix.net#690.31_(B)_(2)" + }, + { + "body": "Where ac and dc conductors of PV systems occupy the same junction box, pull box, or wireway, the ac and dc circuit conductors shall be grouped separately by cable ties or similar means at least once and at intervals not to exceed 1.8 m (6 ft). Exception: The requirement for grouping shall not apply if the circuit enters from a cable or raceway unique to the circuit that makes the grouping obvious.", + "displayTitle": "(3) Grouping", + "children": [], + "url": "https://2023.antflix.net#690.31_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#690.31_(B)" + }, + { + "body": "Type PV wire or cable and Type distributed generation (DG) cable shall be listed. Informational Note: See UL 4703, Standard for Photovoltaic Wire, for PV wire and UL 3003, Distributed Generation Cables, for DG cable. PV wire and cable and DG cable have a nonstandard outer diameter.", + "displayTitle": "(C) Cables", + "children": [ + { + "body": "Single-conductor cables shall comply with 690.31 (C)(1)(a) through (C)(1)(c). Single-conductor cable in exposed outdoor locations in PV system dc circuits within the PV array shall be permitted to be one of the following:PV wire or cableSingle-conductor cable marked sunlight resistant and Type USE-2 and Type RHW-2Exposed cables sized 8 AWG or smaller shall be supported and secured at intervals not to exceed 600 mm (24 in.) by cable ties, straps, hangers, or similar fittings listed and identified for securement and support in outdoor locations. PV wire or cable shall be permitted in all locations where RHW-2 is permitted.PV systems meeting the requirements of 691.4 shall be permitted to have support and securement intervals as defined in the engineered design.Exposed cables sized larger than 8 AWG shall be supported and secured at intervals not to exceed 1400 mm (54 in.) by cable ties, straps, hangers, or similar fittings listed and identified for securement and support in outdoor locations.", + "displayTitle": "(1) Single-Conductor Cable", + "children": [], + "url": "https://2023.antflix.net#690.31_(C)_(1)" + }, + { + "body": "Single-conductor PV wire or cable of all sizes or distributed generation (DG) cable of all sizes, with or without a cable tray rating, shall be permitted in cable trays installed in outdoor locations, provided that the cables are supported at intervals not to exceed 300 mm (12 in.) and secured at intervals not to exceed 1400 mm (54 in.). Where installed in uncovered cable trays, ampacity of single-conductor PV wire smaller than 1/0 AWG, the adjustment factors for 1/0 AWG single conductor cable in 392.80(A)(2) shall be permitted to be used. Where single-conductor PV wire smaller than 1/0 AWG is installed in ladder ventilated trough cable trays, the following shall apply:All single conductors shall be installed in a single layer.Conductors that are bound together to comprise each circuit pair shall be permitted to be installed in other than a single layer.The sum of diameters of all single conductor cables shall not exceed the cable tray width.", + "displayTitle": "(2) Cable Tray", + "children": [], + "url": "https://2023.antflix.net#690.31_(C)_(2)" + }, + { + "body": "Where part of a listed PV assembly, multiconductor jacketed cables shall be installed in accordance with the included instructions. Where not part of a listed assembly, or where not otherwise covered in this Code, multiconductor jacketed cables, including DG cable, shall be installed in accordance with the product listing and shall be permitted in PV systems. These cables shall be installed in accordance with the following: In raceways, where on or in buildings other than rooftopsWhere not in raceways, in accordance with the following:Marked sunlight resistant in exposed outdoor locationsProtected or guarded, where subject to physical damageClosely follow the surface of support structuresSecured at intervals not exceeding 1.8 m (6 ft)Secured within 600 mm (24 in.) of mating connectors or entering enclosuresMarked direct burial, where buried in the earth", + "displayTitle": "(3) Multiconductor Jacketed Cables", + "children": [], + "url": "https://2023.antflix.net#690.31_(C)_(3)" + }, + { + "body": "Flexible cords and flexible cables, where connected to moving parts of tracking PV arrays, shall comply with Article 400 and shall be of a type identified as a hard service cord or portable power cable; they shall be suitable for extra-hard usage, listed for outdoor use, water resistant, and sunlight resistant. Allowable ampacities shall be in accordance with 400.5. Stranded copper PV wire shall be permitted to be connected to moving parts of tracking PV arrays in accordance with the minimum number of strands specified in Table 690.31(C)(4).", + "displayTitle": "(4) Flexible Cords and Cables Connected to Tracking PV Arrays", + "children": [], + "url": "https://2023.antflix.net#690.31_(C)_(4)" + }, + { + "body": "Flexible, fine-stranded cables shall be terminated only with terminals, lugs, devices, or connectors in accordance with 110.14.", + "displayTitle": "(5) Flexible, Fine-Stranded Cables", + "children": [], + "url": "https://2023.antflix.net#690.31_(C)_(5)" + }, + { + "body": "Single-conductor cables listed for outdoor use that are sunlight resistant and moisture resistant in sizes 16 AWG and 18 AWG shall be permitted for module interconnections where such cables meet the ampacity requirements of 400.5. Section 310.14 shall be used to determine the cable ampacity adjustment and correction factors. Table 690.31(C)(4) Minimum PV Wire Strands PV Wire AWG Minimum Strands 18 17 16\u201410 19 8\u20144 49 2 130 1 AWG\u20141000 MCM 259 ", + "displayTitle": "(6) Small-Conductor Cables", + "children": [], + "url": "https://2023.antflix.net#690.31_(C)_(6)" + } + ], + "url": "https://2023.antflix.net#690.31_(C)" + }, + { + "body": "Wiring methods on or in buildings shall comply with the installation requirements in 690.31(D)(1) and (D)(2).", + "displayTitle": "(D) Direct-Current Circuits on or in Buildings", + "children": [ + { + "body": "Where inside buildings, PV system dc circuits that exceed 30 volts or 8 amperes shall be contained in metal raceways, in Type MC metal-clad cable that complies with 250.118(A)(10)(b) or (A)(10)(c), or in metal enclosures. Exception: PVHCS installed in accordance with 690.12(B)(2)(1) shall be permitted to be provided with or listed for use with nonmetallic enclosure(s), nonmetallic raceway(s), and cables other than Type MC metal-clad cable(s), at the point of penetration of the surface of the building.", + "displayTitle": "(1) Metal Raceways and Enclosures", + "children": [], + "url": "https://2023.antflix.net#690.31_(D)_(1)" + }, + { + "body": "Unless located and arranged so the purpose is evident, the following wiring methods and enclosures that contain PV system dc circuit conductors shall be marked with the wording PHOTOVOLTAIC POWER SOURCE or SOLAR PV DC CIRCUIT by means of permanently affixed labels or other approved permanent marking: Exposed raceways, cable trays, and other wiring methodsCovers or enclosures of pull boxes and junction boxesConduit bodies in which any of the available conduit openings are unusedThe labels or markings shall be visible after installation. All letters shall be capitalized and shall be a minimum height of 9.5 mm (3/8 in.) in white on a red background. Labels shall appear on every section of the wiring system that is separated by enclosures, walls, partitions, ceilings, or floors. Spacing between labels or markings, or between a label and a marking, shall not be more than 3 m (10 ft). Labels required by this section shall be suitable for the environment where they are installed.", + "displayTitle": "(2) Marking and Labeling", + "children": [], + "url": "https://2023.antflix.net#690.31_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#690.31_(D)" + }, + { + "body": "Where the sum, without consideration of polarity, of the voltages of the two monopole circuits exceeds the rating of the conductors and connected equipment, monopole circuits in a bipolar PV system shall be physically separated, and the electrical output circuits from each monopole circuit shall be installed in separate raceways until connected to the inverter. The disconnecting means and overcurrent protective devices for each monopole circuit output shall be in separate enclosures. All conductors from each separate monopole circuit shall be routed in the same raceway. Solidly grounded bipolar PV systems shall be clearly marked with a permanent, legible warning notice indicating that the disconnection of the grounded conductor(s) may result in overvoltage on the equipment. Exception: Listed switchgear rated for the maximum voltage between circuits and containing a physical barrier separating the disconnecting means for each monopole circuit shall be permitted to be used instead of disconnecting means in separate enclosures.", + "displayTitle": "(E) Bipolar Photovoltaic Systems", + "children": [], + "url": "https://2023.antflix.net#690.31_(E)" + }, + { + "body": "Roof-mounted PV array mounting systems shall be permitted to be held in place with an approved means other than those required by 110.13 and shall utilize wiring methods that allow any expected movement of the array. Informational Note: Expected movement of unattached PV arrays is often included in structural calculations.", + "displayTitle": "(F) Wiring Methods and Mounting Systems", + "children": [], + "url": "https://2023.antflix.net#690.31_(F)" + }, + { + "body": "Equipment and wiring methods containing PV system dc circuits with a maximum voltage greater than 1000 volts shall comply with the following: Shall not be permitted on or in one- and two-family dwellings.Shall not be permitted within buildings containing habitable rooms.Where installed on the exterior of buildings shall be located less than 3 m (10 ft) above grade. Wiring methods containing PV system dc circuits connected to this equipment shall not be permitted to attach to the building greater than 10 m (33 ft) along the building surface from the equipment.", + "displayTitle": "(G) Over 1000 Volts DC", + "children": [], + "url": "https://2023.antflix.net#690.31_(G)" + } + ], + "url": "https://2023.antflix.net#690.31" + }, + { + "body": "Fittings and connectors that are intended to be concealed at the time of on-site assembly, where listed for such use, shall be permitted for on-site interconnection of modules or other array components. Such fittings and connectors shall be equal to the wiring method employed in insulation, temperature rise, and short-circuit current rating, and shall be capable of resisting the effects of the environment in which they are used.", + "displayTitle": "690.32 Component Interconnections", + "children": [], + "url": "https://2023.antflix.net#690.32" + }, + { + "body": "Mating connectors, other than connectors covered by 690.32, shall comply with 690.33(A) through (D).", + "displayTitle": "690.33 Mating Connectors", + "children": [ + { + "body": "The mating connectors shall be polarized and shall have a configuration that is noninterchangeable with receptacles in other electrical systems on the premises.", + "displayTitle": "(A) Configuration", + "children": [], + "url": "https://2023.antflix.net#690.33_(A)" + }, + { + "body": "The mating connectors shall be constructed and installed so as to guard against inadvertent contact with live parts by persons.", + "displayTitle": "(B) Guarding", + "children": [], + "url": "https://2023.antflix.net#690.33_(B)" + }, + { + "body": "The mating connectors shall be of the latching or locking type. Mating connectors that are readily accessible and that are used in circuits operating at over 30 volts dc or 15 volts ac shall require a tool for opening. Where mating connectors are not of the identical type and brand, they shall be listed and identified for intermatability, as described in the manufacturer's instructions.", + "displayTitle": "(C) Type", + "children": [], + "url": "https://2023.antflix.net#690.33_(C)" + }, + { + "body": "Mating connectors shall be one of the following: Rated for interrupting current without hazard to the operatorA type that requires the use of a tool to open and marked \"Do Not Disconnect Under Load\" or \"Not for Current Interrupting\"Supplied as part of listed equipment and used in accordance with instructions provided with the listed connected equipmentInformational Note: Some listed equipment, such as micro-inverters, are evaluated to make use of mating connectors as disconnect devices even though the mating connectors are marked as \"Do Not Disconnect Under Load\" or \"Not for Current Interrupting.\"", + "displayTitle": "(D) Interruption of Circuit", + "children": [], + "url": "https://2023.antflix.net#690.33_(D)" + } + ], + "url": "https://2023.antflix.net#690.33" + }, + { + "body": "Junction, pull, and outlet boxes located behind modules or panels shall be so installed that the wiring contained in them can be rendered accessible directly or by displacement of a module(s) or panel(s) secured by removable fasteners and connected by a flexible wiring system.", + "displayTitle": "690.34 Access to Boxes", + "children": [], + "url": "https://2023.antflix.net#690.34" + }, + { + "displayTitle": "Part V Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#divider_24_V" + }, + { + "displayTitle": "690.41 PV System DC Circuit Grounding and Protection", + "children": [ + { + "body": "One or more of the following system configurations shall be employed for PV system dc circuits: 2-wire circuits with one functionally grounded conductorBipolar circuits according to 690.7(C) with a functional ground reference (center tap)Circuits not isolated from the grounded inverter output circuitUngrounded circuitsSolidly grounded circuits as permitted in 690.41 (B)Circuits protected by equipment listed and identified for the use", + "displayTitle": "(A) PV System DC Circuit Grounding Configurations", + "children": [], + "url": "https://2023.antflix.net#690.41_(A)" + }, + { + "body": "PV system dc circuits that exceed 30 volts or 8 amperes shall be provided with GFDI protection meeting the requirements of 690.41 (B)(1) and (B)(2) to reduce fire hazards. Solidly grounded PV source circuits with not more than two modules in parallel and not on or in buildings shall be permitted without GFDI protection. Informational Note: Not all inverters, charge controllers, or dc-to-dc converters include dc GFDI protection. Equipment that does not have GFDI protection often includes the following statement in the manual: \"Warning: This unit is not provided with a GFDI device.\"", + "displayTitle": "(B) DC Ground-Fault Detector-Interrupter (GFDI) Protection", + "children": [ + { + "body": "The GFDI device or system shall detect ground fault(s) in the PV system dc circuits, including any functionally grounded conductors, and be listed for providing GFDI protection. For dc-to-dc converters not listed as providing GFDI protection, where required, listed GFDI protection equipment identified for the combination of the dc-to-dc converter and the GFDI device shall be installed to protect the circuit. Informational Note: Some dc-to-dc converters without integral GFDI protection on their input (source) side can prevent other GFDI protection equipment from properly functioning on portions of PV system dc circuits.", + "displayTitle": "(1) Ground-Fault Detection", + "children": [], + "url": "https://2023.antflix.net#690.41_(B)_(1)" + }, + { + "body": "The faulted circuits shall be controlled by one of the following methods: The current-carrying conductors of the faulted circuit shall be automatically disconnected.The device providing GFDI protection fed by the faulted circuit shall automatically cease to supply power to output circuits and interrupt the faulted PV system dc circuits from the ground reference in a functionally grounded system.", + "displayTitle": "(2) Faulted Circuits", + "children": [], + "url": "https://2023.antflix.net#690.41_(B)_(2)" + }, + { + "body": "The GFDI protection equipment shall provide indication of ground faults at a readily accessible location. Informational Note: Examples of indication include, but are not limited to, the following: remote indicator light, display, monitor, signal to a monitored alarm system, or receipt of notification by web-based services.", + "displayTitle": "(3) Indication of Faults", + "children": [], + "url": "https://2023.antflix.net#690.41_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#690.41_(B)" + } + ], + "url": "https://2023.antflix.net#690.41" + }, + { + "displayTitle": "690.42 Point of PV System DC Circuit Grounding Connection", + "children": [ + { + "body": "Circuits protected by GFDI equipment in accordance with 690.41 (B) shall have any circuit-to-ground connection made by the GFDI equipment.", + "displayTitle": "(A) Circuits With GFDI Protection", + "children": [], + "url": "https://2023.antflix.net#690.42_(A)" + }, + { + "body": "For solidly grounded PV system dc circuits, the grounding connection shall be made from any single point on the PV dc system to a point in the grounding electrode system in 690.47(A).", + "displayTitle": "(B) Solidly Grounded Circuits", + "children": [], + "url": "https://2023.antflix.net#690.42_(B)" + } + ], + "url": "https://2023.antflix.net#690.42" + }, + { + "body": "Exposed noncurrent-carrying metal parts of PV module frames, electrical equipment, and conductor enclosures of PV systems shall be connected to an equipment grounding conductor in accordance with 250.134 or 250.136, regardless of voltage. Equipment grounding conductors and devices shall comply with 690.43(A) through (D).", + "displayTitle": "690.43 Equipment Grounding and Bonding", + "children": [ + { + "body": "Devices and systems used for mounting PV modules that are also used for bonding module frames shall be listed, labeled, and identified for bonding PV modules. Informational Note: See UL 2703, Standard for Mounting Systems, Mounting Devices, Clamping/Retention Devices, and Ground Lugs for Use with Flat-Plate Photovoltaic Modules and Panels for PV Module Clamps, and UL 3703, Standard for Solar Trackers.", + "displayTitle": "(A) Photovoltaic Module Mounting Systems and Devices", + "children": [], + "url": "https://2023.antflix.net#690.43_(A)" + }, + { + "body": "Devices listed, labeled, and identified for bonding and grounding the metal parts of PV systems shall be permitted to bond the equipment to grounded metal supports. Metallic support structures shall have identified bonding jumpers connected between separate metallic sections or shall be identified for equipment bonding and shall be connected to the equipment grounding conductor.", + "displayTitle": "(B) Equipment Secured to Grounded Metal Supports", + "children": [], + "url": "https://2023.antflix.net#690.43_(B)" + }, + { + "body": "Equipment grounding conductors shall be permitted to be run separately from the PV system conductors within the PV array. Where PV system circuit conductors leave the vicinity of the PV array, equipment grounding conductors shall comply with 250.134.", + "displayTitle": "(C) Location", + "children": [], + "url": "https://2023.antflix.net#690.43_(C)" + }, + { + "body": "The bonding requirements contained in 250.97 shall apply only to solidly grounded PV system circuits operating over 250 volts to ground.", + "displayTitle": "(D) Bonding for Over 250 Volts", + "children": [], + "url": "https://2023.antflix.net#690.43_(D)" + } + ], + "url": "https://2023.antflix.net#690.43" + }, + { + "body": "Equipment grounding conductors for PV system circuits shall be sized in accordance with 250.122. Where no overcurrent protective device is used in the circuit, an assumed overcurrent device rated in accordance with 690.9(B) shall be used when applying Table 250.122. Increases in equipment grounding conductor size to address voltage drop considerations shall not be required.", + "displayTitle": "690.45 Size of Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#690.45" + }, + { + "displayTitle": "690.47 Grounding Electrode System", + "children": [ + { + "body": "A building or structure(s) supporting a PV system shall utilize a grounding electrode system installed in accordance with 690.47(B). PV array equipment grounding conductors shall be connected to a grounding electrode system in accordance with Part VII of Article 250. This connection shall be in addition to any other equipment grounding conductor requirements in 690.43(C). The PV array equipment grounding conductors shall be sized in accordance with 690.45. For specific PV system grounding configurations permitted in 690.41(A), one of the following conditions shall apply:For PV systems that are not solidly grounded, the equipment grounding conductor for the output of the PV system, where connected to associated distribution equipment connected to a grounding electrode system, shall be permitted to be the only connection to ground for the system.For solidly grounded PV systems, as permitted in 690.41(A)(5), the grounded conductor shall be connected to a grounding electrode system by means of a grounding electrode conductor sized in accordance with 250.166.Informational Note: Most PV systems are functionally grounded systems rather than solidly grounded systems as defined in this Code. For functionally grounded PV systems with an interactive inverter output, the ac equipment grounding conductor is connected to associated grounded ac distribution equipment. This connection is most often the connection to ground for ground-fault protection and equipment grounding of the PV array.", + "displayTitle": "(A) Buildings or Structures Supporting a PV System", + "children": [], + "url": "https://2023.antflix.net#690.47_(A)" + }, + { + "body": "Additional grounding electrodes shall be permitted to be installed in accordance with 250.52 and 250.54. Grounding electrodes shall be permitted to be connected directly to the PV module frame(s) or support structure. A grounding electrode conductor shall be sized according to 250.66. A support structure for a ground-mounted PV array shall be permitted to be considered a grounding electrode if it meets the requirements of 250.52. PV arrays mounted to buildings shall be permitted to use the metal structural frame of the building if the requirements of 250.68(C)(2) are met.", + "displayTitle": "(B) Grounding Electrodes and Grounding Electrode Conductors", + "children": [], + "url": "https://2023.antflix.net#690.47_(B)" + } + ], + "url": "https://2023.antflix.net#690.47" + }, + { + "displayTitle": "Part VI Source Connections", + "children": [], + "url": "https://2023.antflix.net#divider_17_VI" + }, + { + "body": "Plaques or directories shall be installed in accordance with 705.10.", + "displayTitle": "690.56 Identification of Power Sources", + "children": [], + "url": "https://2023.antflix.net#690.56" + }, + { + "body": "PV systems connected to other sources shall be installed in accordance with Parts I and II of Article 705.", + "displayTitle": "690.59 Connection to Other Sources", + "children": [], + "url": "https://2023.antflix.net#690.59" + }, + { + "body": "The PV source circuit shall be considered to comply with the requirements for charge control of a battery without the use of separate charge control equipment if the circuit meets both of the following: The PV source circuit is matched to the voltage rating and charge current requirements of the interconnected battery cells.The maximum charging current multiplied by 1 hour is less than 3 percent of the rated battery capacity expressed in ampere-hours or as recommended by the battery manufacturer.", + "displayTitle": "690.72 Self-Regulated PV Charge Control", + "children": [], + "url": "https://2023.antflix.net#690.72" + } + ], + "url": "https://2023.antflix.net#690" + }, + { + "displayTitle": "Article 691 Large-Scale Photovoltaic (PV) Electric Supply Stations", + "children": [ + { + "body": "This article covers the installation of large-scale PV electric supply stations not under exclusive utility control. Informational Note No. 1: Facilities covered by this article have specific design and safety features unique to large-scale PV facilities outlined in 691.4 and are operated for the sole purpose of providing electric supply to a system operated by a regulated utility for the transfer of electric energy. Informational Note No. 2: See 90.2(B)(5) for additional information about utility-owned properties not covered under this Code. See ANSI/IEEE C2-2017, National Electrical Safety Code, for additional information on electric supply stations. Informational Note No. 3: See Informational Note Figure 691.1. Notes:The diagram is for informational purposes only and is not representative of all potential configurations.Custom designs occur in each configuration, and some components are optional.Informational Note Figure 691.1 Identification of Large-Scale PV Electric Supply Station Components.", + "displayTitle": "691.1 Scope", + "children": [], + "url": "https://2023.antflix.net#691.1" + }, + { + "body": "Large-scale PV electric supply stations shall be accessible only to authorized personnel and comply with the following: Electrical circuits and equipment shall be maintained and operated only by qualified persons.Informational Note No. 1: See NFPA 70E-2021, Standard for Electrical Safety in the Workplace, for electrical safety requirements.Access to PV electric supply stations shall be restricted in accordance with 110.31. Field-applied hazard markings shall be applied in accordance with 110.21 (B).The connection between the PV electric supply station and the system operated by a utility for the transfer of electrical energy shall be through medium- or high-voltage switch gear, substation, switch yard, or similar methods whose sole purpose shall be to interconnect the two systems.The electrical loads within the PV electric supply station shall only be used to power auxiliary equipment for the generation of the PV power.Large-scale PV electric supply stations shall not be installed on buildings.The station shall be monitored from a central command center.The station shall have an inverter generating capacity of at least 5000 kW.Informational Note No. 2: Some individual sites with capacities less than 5000 kW are operated as part of a group of facilities with a total generating capacity exceeding 5000 kW.", + "displayTitle": "691.4 Special Requirements for Large-Scale PV Electric Supply Stations", + "children": [], + "url": "https://2023.antflix.net#691.4" + }, + { + "body": "All electrical equipment shall be approved for installation by one of the following: Listing and labelingBe evaluated for the application and have a field label appliedWhere products complying with 691.5(1) or (2) are not available, by engineering review validating that the electrical equipment is evaluated and tested to relevant standards or industry practice", + "displayTitle": "691.5 Equipment", + "children": [], + "url": "https://2023.antflix.net#691.5" + }, + { + "body": "Documentation of the electrical portion of the engineered design of the electric supply station shall be stamped and provided upon request of the AHJ. Additional stamped independent engineering reports detailing compliance of the design with applicable electrical standards and industry practice shall be provided upon request of the AHJ. The independent engineer shall be a licensed professional electrical engineer retained by the system owner or installer. This documentation shall include details of conformance of the design with Article 690, and any alternative methods to Article 690, or other articles of this Code.", + "displayTitle": "691.6 Engineered Design", + "children": [], + "url": "https://2023.antflix.net#691.6" + }, + { + "body": "Documentation that the construction of the electric supply station conforms to the electrical engineered design shall be provided upon request of the AHJ. Additional stamped independent engineering reports detailing the construction conforms with this Code, applicable standards and industry practice shall be provided upon request of the AHJ. The independent engineer shall be a licensed professional electrical engineer retained by the system owner or installer. This documentation, where requested, shall be available prior to commercial operation of the station.", + "displayTitle": "691.7 Conformance of Construction to Engineered Design", + "children": [], + "url": "https://2023.antflix.net#691.7" + }, + { + "body": "For large-scale PV electric supply stations, calculations shall be included in the documentation required in 691.6.", + "displayTitle": "691.8 Direct Current Operating Voltage", + "children": [], + "url": "https://2023.antflix.net#691.8" + }, + { + "body": "Disconnecting means for equipment shall not be required within sight of equipment and shall be permitted to be located remotely from equipment. The engineered design required by 691.6 shall document disconnection procedures and means of isolating equipment. Informational Note: See NFPA 70B-2019, Recommended Practice for Electrical Equipment Maintenance, for information on electrical system maintenance. See NFPA 70E-2021, Standard for Electrical Safety in the Workplace, for information on written procedures and conditions of maintenance, including lockout/tagout procedures. Buildings whose sole purpose is to house and protect supply station equipment shall not be required to comply with 690.12. Written standard operating procedures shall be available at the site detailing necessary shutdown procedures in the event of an emergency.", + "displayTitle": "691.9 Disconnecting Means for Isolating Photovoltaic Equipment", + "children": [], + "url": "https://2023.antflix.net#691.9" + }, + { + "body": "PV systems that do not comply with the requirements of 690.11 shall include details of fire mitigation plans to address dc arc-faults in the documentation required in 691.6. Informational Note: Fire mitigation plans are typically reviewed by the local fire agency and include topics such as access roads within the facility.", + "displayTitle": "691.10 Fire Mitigation", + "children": [], + "url": "https://2023.antflix.net#691.10" + }, + { + "body": "Fence grounding requirements and details shall be included in the documentation required in 691.6. Informational Note: See 250.194 for fence bonding and grounding requirements enclosing substation portions of an electric supply station. Grounding requirements for other portions of electric supply station fencing are assessed based on the presence of overhead conductors, proximity to generation and distribution equipment, and associated step and touch potential.", + "displayTitle": "691.11 Fence Bonding and Grounding", + "children": [], + "url": "https://2023.antflix.net#691.11" + } + ], + "url": "https://2023.antflix.net#691" + }, + { + "displayTitle": "Article 692 Fuel Cell Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_105_I" + }, + { + "body": "This article applies to the installation of fuel cell systems. Informational Note: Some fuel cell systems can be interactive with other electrical power production sources, are stand-alone, or both. Some fuel cell systems are connected to electric energy storage systems such as batteries. Fuel cell systems can have ac output(s), dc output(s), or both for utilization.", + "displayTitle": "692.1 Scope", + "children": [], + "url": "https://2023.antflix.net#692.1" + }, + { + "displayTitle": "692.4 Installation", + "children": [ + { + "body": "A fuel cell system shall be permitted to supply a building or other structure in addition to any service(s) of another electricity supply system(s).", + "displayTitle": "(A) Fuel Cell System", + "children": [], + "url": "https://2023.antflix.net#692.4_(A)" + }, + { + "body": "Fuel cell systems shall be marked with a plaque or directory installed in accordance with 705.10.", + "displayTitle": "(B) Identification of Power Sources", + "children": [], + "url": "https://2023.antflix.net#692.4_(B)" + }, + { + "body": "The construction and operation of equipment, associated wiring, and interconnections shall be performed only by qualified persons. Informational Note: See Article 100 for the definition of qualified person.", + "displayTitle": "(C) System Installation", + "children": [], + "url": "https://2023.antflix.net#692.4_(C)" + } + ], + "url": "https://2023.antflix.net#692.4" + }, + { + "body": "The fuel cell system shall be approved for the application in accordance with one of the following: Be listed for the applicationBe evaluated for the application and have a field label applied", + "displayTitle": "692.6 Listing Requirement", + "children": [], + "url": "https://2023.antflix.net#692.6" + }, + { + "displayTitle": "Part II Circuit Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_105_II" + }, + { + "displayTitle": "692.8 Circuit Sizing and Current", + "children": [ + { + "body": "The nameplate(s) rated circuit current shall be the rated current indicated on the fuel cell nameplate(s).", + "displayTitle": "(A) Nameplate Rated Circuit Current", + "children": [], + "url": "https://2023.antflix.net#692.8_(A)" + }, + { + "body": "The ampacity of the feeder circuit conductors from the fuel cell system(s) to the premises wiring system shall not be less than the greater of (1) nameplate(s) rated circuit current or (2) the rating of the fuel cell system(s) overcurrent protective device(s).", + "displayTitle": "(B) Conductor Ampacity and Overcurrent Device Ratings", + "children": [], + "url": "https://2023.antflix.net#692.8_(B)" + }, + { + "body": "If an interactive single-phase, 2-wire fuel cell output(s) is connected to the grounded or neutral conductor and a single ungrounded conductor of a 3-wire system or of a 3-phase, 4-wire, wye-connected system, the maximum unbalanced neutral load current plus the fuel cell system(s) output rating shall not exceed the ampacity of the grounded or neutral conductor.", + "displayTitle": "(C) Ampacity of Grounded or Neutral Conductor", + "children": [], + "url": "https://2023.antflix.net#692.8_(C)" + } + ], + "url": "https://2023.antflix.net#692.8" + }, + { + "displayTitle": "692.9 Overcurrent Protection", + "children": [ + { + "body": "If the fuel cell system is provided with overcurrent protection sufficient to protect the circuit conductors that supply the load, additional circuit overcurrent devices shall not be required. Equipment and conductors connected to more than one electrical source shall be protected.", + "displayTitle": "(A) Circuits and Equipment", + "children": [], + "url": "https://2023.antflix.net#692.9_(A)" + }, + { + "body": "Overcurrent devices shall be readily accessible.", + "displayTitle": "(B) Accessibility", + "children": [], + "url": "https://2023.antflix.net#692.9_(B)" + } + ], + "url": "https://2023.antflix.net#692.9" + }, + { + "displayTitle": "Part III Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#divider_91_III" + }, + { + "body": "Means shall be provided to disconnect all current-carrying conductors of a fuel cell system power source from all other conductors in a building or other structure.", + "displayTitle": "692.13 All Conductors", + "children": [], + "url": "https://2023.antflix.net#692.13" + }, + { + "body": "The disconnecting means for ungrounded conductors shall consist of readily accessible, manually operable switch(es) or circuit breaker(s). Where all terminals of the disconnecting means may be energized in the open position, a warning sign shall be mounted on or adjacent to the disconnecting means. The sign shall be clearly legible and shall have the following words or equivalent: DANGERELECTRIC SHOCK HAZARD. DO NOT TOUCH TERMINALS. TERMINALS ON BOTH THE LINE AND LOADSIDES MAY BE ENERGIZED IN THE OPEN POSITION. The danger sign(s) or label(s) shall comply with 110.21(B).", + "displayTitle": "692.17 Switch or Circuit Breaker", + "children": [], + "url": "https://2023.antflix.net#692.17" + }, + { + "displayTitle": "Part IV Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#divider_36_IV" + }, + { + "body": "In addition to wiring methods included in Chapter 3 of this Code, wiring methods and fittings specifically listed and identified for use with fuel cell systems shall be permitted.", + "displayTitle": "692.31 Wiring Systems", + "children": [], + "url": "https://2023.antflix.net#692.31" + }, + { + "displayTitle": "Part V Marking", + "children": [], + "url": "https://2023.antflix.net#divider_25_V" + }, + { + "body": "A marking specifying the fuel cell system, output voltage, output power rating, and continuous output current rating shall be provided at the disconnecting means for the fuel cell power source at an accessible location on the site.", + "displayTitle": "692.50 Fuel Cell Power Sources", + "children": [], + "url": "https://2023.antflix.net#692.50" + }, + { + "body": "The location of the manual fuel shut-off valve shall be marked at the location of the primary disconnecting means of the building or circuits supplied.", + "displayTitle": "692.51 Fuel Shut-Off", + "children": [], + "url": "https://2023.antflix.net#692.51" + }, + { + "body": "A fuel cell system that stores electrical energy shall require the following warning sign, or equivalent, at the location of the service disconnecting means of the premises: WARNINGFUEL CELL POWER SYSTEM CONTAINS ELECTRICAL ENERGY STORAGE DEVICES. The warning sign(s) or label(s) shall comply with 110.21(B).", + "displayTitle": "692.52 Stored Energy", + "children": [], + "url": "https://2023.antflix.net#692.52" + }, + { + "displayTitle": "Part VI Connection to Other Circuits", + "children": [], + "url": "https://2023.antflix.net#divider_18_VI" + }, + { + "body": "Fuel cell systems connected to other sources shall be installed in accordance with Parts I and II of Article 705.", + "displayTitle": "692.60 Connection to Other Systems", + "children": [], + "url": "https://2023.antflix.net#692.60" + }, + { + "body": "A transfer switch shall be required in non-grid-interactive systems that use utility grid backup. The transfer switch shall maintain isolation between the electrical production and distribution network and the fuel cell system. The transfer switch shall be permitted to be located externally or internally to the fuel cell system unit. Where the utility service conductors of the structure are connected to the transfer switch, the switch shall comply with Article 230, Part V.", + "displayTitle": "692.61 Transfer Switch", + "children": [], + "url": "https://2023.antflix.net#692.61" + } + ], + "url": "https://2023.antflix.net#692" + }, + { + "displayTitle": "Article 694 Wind Electric Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_106_I" + }, + { + "body": "This article applies to wind (turbine) electric systems that consist of one or more wind electric generators and their related alternators, generators, inverters, controllers, and associated equipment. Informational Note: Some wind electric systems are interactive with other electric power sources (see Informational Note Figure 694.1). Some systems have ac output and some have dc output. Some systems contain electrical energy storage, such as batteries. Informational Note Figure 694.1 Identification of Wind Electric System Components - Interactive System.", + "displayTitle": "694.1 Scope", + "children": [], + "url": "https://2023.antflix.net#694.1" + }, + { + "body": "The construction and maintenance, associated wiring, and interconnections shall be performed only by qualified persons. Informational Note: See Article 100 for the definition of qualified person.", + "displayTitle": "694.7 Construction and Maintenance", + "children": [ + { + "body": "A wind electric system(s) shall be permitted to supply a building or other structure in addition to other sources of supply. These requirements apply to both onshore and offshore installations.", + "displayTitle": "(A) Wind Electric Systems", + "children": [], + "url": "https://2023.antflix.net#694.7_(A)" + }, + { + "body": "Wind electric systems shall comply with one of the following: Be listedBe evaluated for the application and have a field label appliedWind electric systems undergoing evaluation for type certification and listing shall be permitted to be operated in a controlled location with access limited to qualified personnel.Informational Note: See UL 6141, Standard for Wind Turbines Permitting Entry of Personnel, and UL 6142, Standard for Small Wind Turbine Systems, for further information on wind turbine equipment. Ratings for wind turbines could include limitations on installation locations such as onshore or offshore. Testing is typically performed under supervision of a qualified electrical testing organization.", + "displayTitle": "(B) Equipment", + "children": [], + "url": "https://2023.antflix.net#694.7_(B)" + }, + { + "body": "A wind electric system employing a diversion load controller as the primary means of regulating the speed of a wind turbine rotor shall be equipped with an additional, independent, reliable means to prevent over-speed operation. An interconnected utility service shall not be considered to be a reliable diversion load.", + "displayTitle": "(C) Diversion Load Controllers", + "children": [], + "url": "https://2023.antflix.net#694.7_(C)" + }, + { + "body": "A listed surge protective device shall be installed between a wind electric system and any loads served by the premises electrical system. The SPD shall be permitted to be a Type 3 SPD on the circuit serving a wind electric system or a Type 2 SPD located anywhere on the load side of the service disconnect. SPDs shall be installed in accordance with Part II of Article 242.", + "displayTitle": "(D) Overvoltage Protection", + "children": [], + "url": "https://2023.antflix.net#694.7_(D)" + }, + { + "body": "A receptacle shall be permitted to be supplied by a wind electric system branch or feeder circuit for maintenance or data acquisition use. Receptacles shall be protected with an overcurrent device with a rating not to exceed the current rating of the receptacle. In addition to the requirements in 210.8, all 125-volt, single-phase, 15- and 20-ampere receptacles installed for maintenance of the wind turbine shall have ground-fault circuit-interrupter protection for personnel.", + "displayTitle": "(E) Receptacles", + "children": [], + "url": "https://2023.antflix.net#694.7_(E)" + }, + { + "body": "A pole or tower shall be permitted to be used as a raceway if approved in accordance with one of the following: Be evaluated as part of the listing for the wind turbineBe listed for the applicationBe evaluated for the application and have a field label applied", + "displayTitle": "(F) Poles or Towers Supporting Wind Turbines Used as a Raceway", + "children": [], + "url": "https://2023.antflix.net#694.7_(F)" + }, + { + "body": "Working space shall be provided for electrical cabinets and other electrical equipment in accordance with 110.26(A). For large wind turbines where service personnel enter the equipment, where conditions of maintenance and supervision ensure that only qualified persons perform the work, working clearances shall be permitted to comply with Table 694.7(G) for systems up to 1000 volts nominal. Table 694.7(G) Working Spaces Nominal Voltage to Ground Condition 1 Condition 2 Condition 3 0\u2014150 900 mm (3 ft) 900 mm (3 ft) 900 mm (3 ft) 151\u20141000 900 mm (3 ft) 1.0 m (3 ft 6 in.) 1.2 m (4 ft) ", + "displayTitle": "(G) Working Clearances", + "children": [], + "url": "https://2023.antflix.net#694.7_(G)" + } + ], + "url": "https://2023.antflix.net#694.7" + }, + { + "displayTitle": "Part II Circuit Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_106_II" + }, + { + "displayTitle": "694.10 Maximum Voltage", + "children": [ + { + "body": "Wind turbine output circuits on or in one- and two-family dwellings shall be permitted to have a maximum voltage up to 600 volts.", + "displayTitle": "(A) Wind Turbine Output Circuits", + "children": [], + "url": "https://2023.antflix.net#694.10_(A)" + }, + { + "body": "The voltage of dc utilization circuits shall comply with 210.6.", + "displayTitle": "(B) Direct-Current Utilization Circuits", + "children": [], + "url": "https://2023.antflix.net#694.10_(B)" + }, + { + "body": "In one- and two-family dwellings, live parts in circuits over 150 volts to ground shall not be accessible to other than qualified persons while energized. Informational Note: See 110.27 for guarding of live parts and 210.6 for branch circuit voltage limitations.", + "displayTitle": "(C) Circuits Over 150 Volts to Ground", + "children": [], + "url": "https://2023.antflix.net#694.10_(C)" + } + ], + "url": "https://2023.antflix.net#694.10" + }, + { + "displayTitle": "694.12 Circuit Sizing and Current", + "children": [ + { + "body": "The maximum current for a circuit shall be calculated in accordance with 694.12(A)(1) through (A)(3).", + "displayTitle": "(A) Calculation of Maximum Circuit Current", + "children": [ + { + "body": "The maximum current shall be based on the circuit current of the wind turbine operating at maximum output power.", + "displayTitle": "(1) Turbine Output Circuit Currents", + "children": [], + "url": "https://2023.antflix.net#694.12_(A)_(1)" + }, + { + "body": "The maximum output current shall be the inverter continuous output current rating.", + "displayTitle": "(2) Inverter Output Circuit Current", + "children": [], + "url": "https://2023.antflix.net#694.12_(A)_(2)" + }, + { + "body": "The maximum input current shall be the stand-alone continuous inverter input current rating of the inverter producing rated power at the lowest input voltage.", + "displayTitle": "(3) Stand-Alone Inverter Input Circuit Current", + "children": [], + "url": "https://2023.antflix.net#694.12_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#694.12_(A)" + }, + { + "displayTitle": "(B) Ampacity and Overcurrent Device Ratings", + "children": [ + { + "body": "Wind turbine electric system currents shall be considered to be continuous.", + "displayTitle": "(1) Continuous Current", + "children": [], + "url": "https://2023.antflix.net#694.12_(B)_(1)" + }, + { + "body": "Circuit conductors and overcurrent devices shall be sized to carry not less than 125 percent of the maximum current as calculated in 694.12(A). The rating or setting of overcurrent devices shall be permitted in accordance with 240.4(B) and (C). Exception: Circuits containing an assembly, together with its overcurrent devices, listed for continuous operation at 100 percent of its rating shall be permitted to be used at 100 percent of its rating.", + "displayTitle": "(2) Sizing of Conductors and Overcurrent Devices", + "children": [], + "url": "https://2023.antflix.net#694.12_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#694.12_(B)" + } + ], + "url": "https://2023.antflix.net#694.12" + }, + { + "displayTitle": "694.15 Overcurrent Protection", + "children": [ + { + "body": "Turbine output circuits, inverter output circuits, and storage battery circuit conductors and equipment shall be protected in accordance with 240.4 and 240.5. Circuits connected to more than one electrical source shall have overcurrent devices located so as to provide overcurrent protection from all sources. Exception: An overcurrent device shall not be required for circuit conductors sized in accordance with 694.12(B) where the maximum current from all sources does not exceed the ampacity of the conductors. Informational Note: Possible backfeed of current from any source of supply, including a supply through an inverter to the wind turbine output circuit, is a consideration in determining whether overcurrent protection from all sources is provided. Some wind electric systems rely on the turbine output circuit to regulate turbine speed. Inverters may also operate in reverse for turbine startup or speed control.", + "displayTitle": "(A) Circuits and Equipment", + "children": [], + "url": "https://2023.antflix.net#694.15_(A)" + }, + { + "body": "Overcurrent protection for a transformer with sources on each side shall be provided in accordance with 450.3 by considering first one side of the transformer, then the other side of the transformer, as the primary. Exception: A power transformer with a current rating on the side connected to the inverter output, which is not less than the rated continuous output current rating of the inverter, shall not be required to have overcurrent protection at the inverter.", + "displayTitle": "(B) Power Transformers", + "children": [], + "url": "https://2023.antflix.net#694.15_(B)" + }, + { + "body": "Overcurrent devices, either fuses or circuit breakers, used in any dc portion of a wind electric system shall be listed for use in dc circuits and shall have appropriate voltage, current, and interrupting ratings.", + "displayTitle": "(C) Direct-Current Rating", + "children": [], + "url": "https://2023.antflix.net#694.15_(C)" + } + ], + "url": "https://2023.antflix.net#694.15" + }, + { + "displayTitle": "Part III Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#divider_92_III" + }, + { + "body": "Means shall be provided to disconnect all current-carrying conductors of a wind electric power source from all other conductors in a building or other structure. A switch, circuit breaker, or other device, either ac or dc, shall not be installed in a grounded conductor if operation of that switch, circuit breaker, or other device leaves the marked, grounded conductor in an ungrounded and energized state. Exception: A wind turbine that uses the turbine output circuit for regulating turbine speed shall not require a turbine output circuit disconnecting means.", + "displayTitle": "694.20 All Conductors", + "children": [], + "url": "https://2023.antflix.net#694.20" + }, + { + "body": "Disconnecting means shall comply with 694.22(A) through (D).", + "displayTitle": "694.22 Additional Provisions", + "children": [ + { + "body": "The disconnecting means shall not be required to be suitable for use as service equipment. The disconnecting means for ungrounded conductors shall consist of manually operable switches or circuit breakers complying with all of the following requirements: They shall be located where readily accessible.They shall be externally operable without exposing the operator to contact with live parts.They shall plainly indicate whether in the open or closed position.They shall have an interrupting rating sufficient for the nominal circuit voltage and the current that is available at the line terminals of the equipment.Where all terminals of the disconnecting means are capable of being energized in the open position, a warning sign shall be mounted on or adjacent to the disconnecting means. The sign shall be clearly legible and shall have the following words or equivalent:WARNING.ELECTRIC SHOCK HAZARD. DO NOT TOUCH TERMINALS. TERMINALS ON BOTH THE LINE AND LOADSIDES MAY BE ENERGIZED IN THE OPEN POSITION.The warning sign(s) or label(s) shall comply with 110.21 (B).", + "displayTitle": "(A) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#694.22_(A)" + }, + { + "body": "Equipment such as rectifiers, controllers, output circuit isolating and shorting switches, and over-current devices shall be permitted on the wind turbine side of the disconnecting means.", + "displayTitle": "(B) Equipment", + "children": [], + "url": "https://2023.antflix.net#694.22_(B)" + }, + { + "displayTitle": "(C) Requirements for Disconnecting Means", + "children": [ + { + "body": "The wind electric system disconnecting means shall be installed at a readily accessible location either on or adjacent to the turbine tower, on the outside of a building or structure, or inside at the point of entrance of the wind system conductors. Exception: Installations that comply with 694.30(C) shall be permitted to have the disconnecting means located remotely from the point of entry of the wind system conductors. A wind turbine disconnecting means shall not be required to be located at the nacelle or tower. The disconnecting means shall not be installed in bathrooms. For one-family and two-family dwellings, a disconnecting means or manual shutdown button or switch shall be located at a readily accessible location outside the building.", + "displayTitle": "(1) Location", + "children": [], + "url": "https://2023.antflix.net#694.22_(C)_(1)" + }, + { + "body": "Each turbine system disconnecting means shall be permanently marked to identify it as a wind electric system disconnect.", + "displayTitle": "(2) Marking", + "children": [], + "url": "https://2023.antflix.net#694.22_(C)_(2)" + }, + { + "body": "Turbine system disconnecting means shall be suitable for the prevailing conditions.", + "displayTitle": "(3) Suitable for Use", + "children": [], + "url": "https://2023.antflix.net#694.22_(C)_(3)" + }, + { + "body": "The turbine disconnecting means shall consist of not more than six switches or six circuit breakers mounted in a single enclosure, in a group of separate enclosures, or in or on a switchgear.", + "displayTitle": "(4) Maximum Number of Disconnects", + "children": [], + "url": "https://2023.antflix.net#694.22_(C)_(4)" + } + ], + "url": "https://2023.antflix.net#694.22_(C)" + }, + { + "body": "Rectifiers, controllers, and inverters shall be permitted to be mounted in nacelles or other exterior areas that are not readily accessible.", + "displayTitle": "(D) Equipment That Is Not Readily Accessible", + "children": [], + "url": "https://2023.antflix.net#694.22_(D)" + } + ], + "url": "https://2023.antflix.net#694.22" + }, + { + "displayTitle": "694.23 Turbine Shutdown", + "children": [ + { + "body": "Wind turbines shall be required to have a readily accessible manual shutdown button or switch. Operation of the button or switch shall result in a parked turbine state that shall either stop the turbine rotor or allow limited rotor speed combined with a means to de-energize the turbine output circuit. Exception: Turbines with a swept area of less than 50 m2 (538 ft2) shall not be required to have a manual shutdown button or switch.", + "displayTitle": "(A) Manual Shutdown", + "children": [], + "url": "https://2023.antflix.net#694.23_(A)" + }, + { + "body": "The shutdown procedure for a wind turbine shall be defined and permanently posted at the location of a shutdown means and at the location of the turbine controller or disconnect, if the location is different.", + "displayTitle": "(B) Shutdown Procedure", + "children": [], + "url": "https://2023.antflix.net#694.23_(B)" + } + ], + "url": "https://2023.antflix.net#694.23" + }, + { + "body": "Means shall be provided to disconnect equipment, such as inverters, batteries, and charge controllers, from all ungrounded conductors of all sources. If the equipment is energized from more than one source, the disconnecting means shall be grouped and identified. A single disconnecting means in accordance with 694.22 shall be permitted for the combined ac output of one or more inverters. A shorting switch or plug shall be permitted to be used as an alternative to a disconnect in systems that regulate turbine speed using the turbine output circuit. Exception: Equipment housed in a turbine nacelle shall not be required to have a disconnecting means.", + "displayTitle": "694.24 Disconnection of Wind Electric System Equipment", + "children": [], + "url": "https://2023.antflix.net#694.24" + }, + { + "body": "Means shall be provided to disconnect a fuse from all sources of supply where the fuse is energized from both directions and is accessible to other than qualified persons. Switches, pullouts, or similar devices that are rated for the application shall be permitted to serve as a means to disconnect fuses from all sources of supply.", + "displayTitle": "694.26 Fuses", + "children": [], + "url": "https://2023.antflix.net#694.26" + }, + { + "body": "Open circuiting, short circuiting, or mechanical brakes shall be used to disable a turbine for installation and service. Informational Note: Some wind turbines rely on the connection from the alternator to a remote controller for speed regulation. Opening turbine output circuit conductors may cause mechanical damage to a turbine and create excessive voltages that could damage equipment or expose persons to electric shock.", + "displayTitle": "694.28 Installation and Service of a Wind Turbine", + "children": [], + "url": "https://2023.antflix.net#694.28" + }, + { + "displayTitle": "Part IV Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#divider_37_IV" + }, + { + "displayTitle": "694.30 Permitted Methods", + "children": [ + { + "body": "In addition to wiring methods included in Chapter 3 of this Code, wiring methods and fittings specifically intended listed and identified for use on wind turbines shall be permitted. In readily accessible locations, turbine output circuits that operate at voltages greater than 30 volts shall be installed in raceways.", + "displayTitle": "(A) Wiring Systems", + "children": [], + "url": "https://2023.antflix.net#694.30_(A)" + }, + { + "body": "Flexible cords and cables, where used to connect the moving parts of turbines or where used for ready removal for maintenance and repair, shall comply with Article 400 and shall be of a type identified as hard service cord or portable power cable, shall be suitable for extra-hard usage, shall be listed for outdoor use, and shall be water resistant. Cables exposed to sunlight shall be sunlight resistant. Flexible, fine-stranded cables shall be terminated only with terminals, lugs, devices, or connectors in accordance with 110.14(A).", + "displayTitle": "(B) Flexible Cords and Cables", + "children": [], + "url": "https://2023.antflix.net#694.30_(B)" + }, + { + "body": "Direct-current turbine output circuits installed inside a building or structure shall be enclosed in metal raceways or installed in metal enclosures, or run in Type MC metal-clad cable that complies with 250.118(A)(10), from the point of penetration of the surface of the building or structure to the first readily accessible disconnecting means.", + "displayTitle": "(C) Direct-Current Turbine Output Circuits Inside a Building", + "children": [], + "url": "https://2023.antflix.net#694.30_(C)" + } + ], + "url": "https://2023.antflix.net#694.30" + }, + { + "displayTitle": "Part V Grounding and Bonding", + "children": [], + "url": "https://2023.antflix.net#divider_26_V" + }, + { + "displayTitle": "694.40 Equipment Grounding and Bonding", + "children": [ + { + "body": "Exposed non-current-carrying metal parts of towers, turbine nacelles, other equipment, and conductor enclosures shall be grounded and bonded to the premises grounding and bonding system. Attached metal parts, such as turbine blades and tails that are not likely to become energized, shall not be required to be grounded or bonded.", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#694.40_(A)" + }, + { + "displayTitle": "(B) Tower Grounding and Bonding", + "children": [ + { + "body": "A wind turbine tower shall be connected to a grounding electrode system. Where installed in close proximity to galvanized foundation or tower anchor components, galvanized grounding electrodes shall be used. Informational Note: Copper and copper-clad grounding electrodes, where used in highly conductive soils, can cause electrolytic corrosion of galvanized foundation and tower anchor components.", + "displayTitle": "(1) Grounding Electrodes and Grounding Electrode Conductors", + "children": [], + "url": "https://2023.antflix.net#694.40_(B)_(1)" + }, + { + "body": "Equipment grounding conductors or supply-side bonding jumpers, as applicable, shall be required between turbines, towers, and the premises grounding system.", + "displayTitle": "(2) Bonding Conductor", + "children": [], + "url": "https://2023.antflix.net#694.40_(B)_(2)" + }, + { + "body": "Equipment grounding, bonding, and grounding electrode conductors, where used, shall be connected to metallic towers using listed means. All mechanical elements used to terminate these conductors shall be accessible.", + "displayTitle": "(3) Tower Connections", + "children": [], + "url": "https://2023.antflix.net#694.40_(B)_(3)" + }, + { + "body": "Guy wires used to support turbine towers shall not be required to be connected to an equipment grounding conductor or to comply with the requirements of 250.110. Informational Note: Guy wires supporting grounded towers are unlikely to become energized under normal conditions, but partial lightning currents could flow through guy wires when exposed to a lightning environment. Grounding of metallic guy wires may be required by lightning standards. See NFPA 780-2017, Standard for the Installation of Lightning Protection Systems, for information on lightning protection systems.", + "displayTitle": "(4) Guy Wires", + "children": [], + "url": "https://2023.antflix.net#694.40_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#694.40_(B)" + } + ], + "url": "https://2023.antflix.net#694.40" + }, + { + "displayTitle": "Part VI Marking", + "children": [], + "url": "https://2023.antflix.net#divider_19_VI" + }, + { + "body": "Wind electric systems employing energy storage shall be marked with the maximum operating voltage, any equalization voltage, and the polarity of the grounded circuit conductor.", + "displayTitle": "694.52 Power Systems Employing Energy Storage", + "children": [], + "url": "https://2023.antflix.net#694.52" + }, + { + "body": "Wind turbine systems shall be marked with a plaque or directory installed in accordance with 705.10.", + "displayTitle": "695.54 Identification of Power Sources", + "children": [], + "url": "https://2023.antflix.net#695.54" + }, + { + "body": "A plaque shall be installed at or adjacent to the turbine location providing basic instructions for disabling the turbine.", + "displayTitle": "696.56 Instructions for Disabling Turbine", + "children": [], + "url": "https://2023.antflix.net#696.56" + }, + { + "displayTitle": "Part VII Connection to Other Sources", + "children": [], + "url": "https://2023.antflix.net#divider_15_VII" + }, + { + "body": "Only inverters that are listed, labeled, and identified as interactive shall be permitted in interactive systems.", + "displayTitle": "694.60 Identified Interactive Equipment", + "children": [], + "url": "https://2023.antflix.net#694.60" + }, + { + "body": "Wind electric systems connected to other sources shall be installed in accordance with Parts I and II of Article 705.", + "displayTitle": "694.62 Installation", + "children": [], + "url": "https://2023.antflix.net#694.62" + }, + { + "body": "Wind electric systems connected to dedicated branch or feeder circuits shall be permitted to exceed normal voltage operating ranges on these circuits, provided that the voltage at any distribution equipment supplying other loads remains within normal ranges. Informational Note: Wind turbines might use the electric grid to dump energy from short-term wind gusts. See ANSI C84.1-2006, Voltage Ratings for Electric Power Systems and Equipment (60 Hz), for information on normal operating voltages.", + "displayTitle": "694.66 Operating Voltage Range", + "children": [], + "url": "https://2023.antflix.net#694.66" + } + ], + "url": "https://2023.antflix.net#694" + }, + { + "displayTitle": "Article 695 Fire Pumps", + "children": [ + { + "displayTitle": "695.1 Scope", + "children": [ + { + "body": "This article covers the installation of the following: Electric power sources and interconnecting circuitsSwitching and control equipment dedicated to fire pump driversInformational Note: Text that is followed by a reference in brackets has been extracted from NFPA 20-2019, Standard for the Installation of Stationary Pumps for Eire Protection. Only editorial changes were made to the extracted text to make it consistent with this Code.", + "displayTitle": "(A) Covered", + "children": [], + "url": "https://2023.antflix.net#695.1_(A)" + }, + { + "body": "This article does not cover the following: The performance, maintenance, and acceptance testing of the fire pump system and the internal wiring of the components of the systemThe installation of pressure maintenance (jockey or makeup) pumpsInformational Note No. 1: See Article 430 for the installation of pressure maintenance (jockey or makeup) pumps supplied by the fire pump circuit or another source.Transfer equipment upstream of the fire pump transfer switch(es)Informational Note No. 2: See NFPA 20-2019, Standard for the Installation of Stationary Pumps for Fire Protection, for further information.Water pumps installed in one- and two-family dwellings and used for fire suppressionInformational Note No. 3: See NFPA 13D-2019, Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, for further information.", + "displayTitle": "(B) Not Covered", + "children": [], + "url": "https://2023.antflix.net#695.1_(B)" + } + ], + "url": "https://2023.antflix.net#695.1" + }, + { + "body": "Reconditioned fire pump controllers and transfer switches shall not be permitted.", + "displayTitle": "695.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#695.2" + }, + { + "body": "Electric motor-driven fire pumps shall have a reliable source of power. Informational Note: See NFPA 20-2019, Standard for the Installation of Stationary Pumps for Fire Protection, 9.3.2 and A.9.3.2, for guidance on the determination of power source reliability.", + "displayTitle": "695.3 Power Source(s) for Electric Motor-Driven Fire Pumps", + "children": [ + { + "body": "Where reliable, and where capable of carrying indefinitely the sum of the locked-rotor current of the fire pump motor(s) and the pressure maintenance pump motor(s) and the full-load current of the associated fire pump accessory equipment when connected to this power supply, the power source for an electric motor driven fire pump shall be one or more of the following.", + "displayTitle": "(A) Individual Sources", + "children": [ + { + "body": "A fire pump shall be permitted to be supplied by a separate service, or from a connection located ahead of and not within the same cabinet, enclosure, vertical switchgear section, or vertical switchboard section as the service disconnecting means. The connection shall be located and arranged so as to minimize the possibility of damage by fire from within the premises and from exposing hazards. A tap ahead of the service disconnecting means shall comply with 230.82(5). The service equipment shall comply with the labeling requirements in 230.2 and the location requirements in 230.72(B). [20:9.2.2(1)]", + "displayTitle": "(1) Electric Utility Service Connection", + "children": [], + "url": "https://2023.antflix.net#695.3_(A)_(1)" + }, + { + "body": "A fire pump shall be permitted to be supplied by an on-site power production facility. The source facility shall be located and protected to minimize the possibility of damage by fire. [20:9.2.2(3)]", + "displayTitle": "(2) On-Site Power Production Facility", + "children": [], + "url": "https://2023.antflix.net#695.3_(A)_(2)" + }, + { + "body": "A dedicated feeder shall be permitted where it is derived from a service connection as described in 695.3(A)(1). [20:9.2.2(3)] Informational Note: See NFPA 20-2019, Standard for the Installation of Stationary Pumps for Fire Protection, 9.2.2, for more information on normal power sources. Subsection 9.2.2(3) permits a \"dedicated feeder\" to be derived from a \"dedicated service\" disconnecting means. Subsection 9.2.2(5) permits a \"dedicated transformer connection\" that is supplied directly from a \"dedicated service disconnecting means\" where the service is not at utilization voltage.", + "displayTitle": "(3) Dedicated Feeder", + "children": [], + "url": "https://2023.antflix.net#695.3_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#695.3_(A)" + }, + { + "body": "If reliable power cannot be obtained from a source described in 695.3(A), power shall be supplied by one of the following: [20:9.3.2]", + "displayTitle": "(B) Multiple Sources", + "children": [ + { + "body": "An approved combination of two or more of the sources from 695.3(A).", + "displayTitle": "(1) Individual Sources", + "children": [], + "url": "https://2023.antflix.net#695.3_(B)_(1)" + }, + { + "body": "An approved combination of one or more of the sources in 695.3(A) and an on-site standby generator complying with 695.3(D). [20:9.3.4] Exception to 695.3(B)(1) and (B)(2): An alternate source of power shall not be required where a back-up engine-driven fire pump, back-up steam turbine-driven fire pump, or back-up electric motor-driven fire pump with an independent power source in accordance with 695.3(A) or (C) is installed.", + "displayTitle": "(2) Individual Source and On-Site Standby Generator", + "children": [], + "url": "https://2023.antflix.net#695.3_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#695.3_(B)" + }, + { + "body": "If the sources in 695.3(A) are not practicable and the installation is part of a multibuilding campus-style complex, feeder sources shall be permitted if approved by the authority having jurisdiction and installed in accordance with either 695.3(C)(1) and (C)(3) or (C)(2) and (C)(3).", + "displayTitle": "(C) Multibuilding Campus-Style Complexes", + "children": [ + { + "body": "Two or more feeders shall be permitted as more than one power source if such feeders are connected to, or derived from, separate utility services. The connection(s), overcurrent protective device(s), and disconnecting means for such feeders shall meet the requirements of 695.4(B)(1)(b).", + "displayTitle": "(1) Feeder Sources", + "children": [], + "url": "https://2023.antflix.net#695.3_(C)_(1)" + }, + { + "body": "A feeder shall be permitted as a normal power source if an alternate power source independent from the feeder is provided. The connection(s), overcurrent protective device(s), and disconnecting means for such feeders shall meet the requirements of 695.4(B)(1)(b).", + "displayTitle": "(2) Feeder and Alternate Source", + "children": [], + "url": "https://2023.antflix.net#695.3_(C)_(2)" + }, + { + "body": "Overcurrent protective device(s) shall be selectively coordinated with all supply-side overcurrent protective device(s). Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, maintain, and operate the system. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device.", + "displayTitle": "(3) Selective Coordination", + "children": [], + "url": "https://2023.antflix.net#695.3_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#695.3_(C)" + }, + { + "body": "An on-site standby generator(s) used as an alternate source of power shall comply with 695.3(D)(1) through (D)(3). [20:9.6.2.1]", + "displayTitle": "(D) On-Site Standby Generator as Alternate Source", + "children": [ + { + "body": "The generator shall have sufficient capacity to allow normal starting and running of the motor(s) driving the fire pump(s) while supplying all other simultaneously operated load(s). [20:9.6.1.1] Automatic shedding of one or more optional standby loads in order to comply with this capacity requirement shall be permitted.", + "displayTitle": "(1) Capacity", + "children": [], + "url": "https://2023.antflix.net#695.3_(D)_(1)" + }, + { + "body": "A tap ahead of the generator disconnecting means shall not be required. [20:9.6.1.2]", + "displayTitle": "(2) Connection", + "children": [], + "url": "https://2023.antflix.net#695.3_(D)_(2)" + }, + { + "body": "The requirements of 430.113 shall not apply.", + "displayTitle": "(3) Adjacent Disconnects", + "children": [], + "url": "https://2023.antflix.net#695.3_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#695.3_(D)" + }, + { + "body": "All power supplies shall be located and arranged to protect against damage by fire from within the premises and exposing hazards. [20:9.1.4] Multiple power sources shall be arranged so that a fire at one source does not cause an interruption at the other source.", + "displayTitle": "(E) Arrangement", + "children": [], + "url": "https://2023.antflix.net#695.3_(E)" + }, + { + "body": "Transfer of power to the fire pump controller between the individual source and one alternate source shall take place within the pump room. [20:9.6.4]", + "displayTitle": "(F) Transfer of Power", + "children": [], + "url": "https://2023.antflix.net#695.3_(F)" + }, + { + "body": "Selection of power source shall be performed by a transfer switch listed for fire pump service. [20:10.8.1.3.1]", + "displayTitle": "(G) Power Source Selection", + "children": [], + "url": "https://2023.antflix.net#695.3_(G)" + }, + { + "body": "An instantaneous trip circuit breaker shall be permitted in lieu of the overcurrent devices specified in 695.4(B)(2)(a)(1), provided that it is part of a transfer switch assembly listed for fire pump service that complies with 695.4(B)(2)(a)(2).", + "displayTitle": "(H) Overcurrent Device Selection", + "children": [], + "url": "https://2023.antflix.net#695.3_(H)" + }, + { + "body": "Phase converters shall not be used to supply power to a fire pump. [20:9.1.7]", + "displayTitle": "(I) Phase Converters", + "children": [], + "url": "https://2023.antflix.net#695.3_(I)" + } + ], + "url": "https://2023.antflix.net#695.3" + }, + { + "body": "Circuits that supply electric motor-driven fire pumps shall be supervised from inadvertent disconnection as covered in 695.4(A) or (B).", + "displayTitle": "695.4 Continuity of Power", + "children": [ + { + "body": "The supply conductors shall directly connect the power source to a listed fire pump controller, a listed combination fire pump controller and power transfer switch, or a listed fire pump power transfer switch.", + "displayTitle": "(A) Direct Connection", + "children": [], + "url": "https://2023.antflix.net#695.4_(A)" + }, + { + "displayTitle": "(B) Connection Through Disconnecting Means and Overcurrent Device", + "children": [ + { + "body": "General. A single disconnecting means and associated overcurrent protective device(s) shall be permitted to be installed between the fire pump power source(s) and one of the following: [20:9.2.3]A listed fire pump controllerA listed fire pump power transfer switchA listed combination fire pump controller and power transfer switchFeeder Sources. For systems installed under the provisions of 695.3(C) only, additional disconnecting means and the associated overcurrent protective device(s) shall be permitted.On-Site Standby Generator. Where an on-site standby generator is used to supply a fire pump, an additional disconnecting means and an associated overcurrent protective device(s) shall be permitted.", + "displayTitle": "(1) Number of Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#695.4_(B)_(1)" + }, + { + "body": "Overcurrent devices shall comply with 695.4(B)(2)(a) or (B)(2)(b). Individual Sources. Overcurrent protection for individual sources shall comply with the following:Overcurrent protective device(s) shall be rated to carry indefinitely the sum of the locked-rotor current of the largest fire pump motor and the full-load current of all of the other pump motors and accessory equipment. [20:9.2.3.4] Where the locked-rotor current value does not correspond to a standard overcurrent device size, the next standard overcurrent device size shall be used in accordance with 240.6. The requirement to carry the locked-rotor currents indefinitely shall not apply to conductors or devices other than overcurrent devices in the fire pump motor circuit(s).Exception: The requirement to carry the locked-rotor currents indefinitely shall not apply to feeder overcurrent protective devices installed in accordance with 695.3(C).Overcurrent protection shall be provided by an assembly listed for fire pump service and complying with the following:The overcurrent protective device shall not open within 2 minutes at 600 percent of the full-load current of the fire pump motor(s).The overcurrent protective device shall not open with a re-start transient of 24 times the full-load current of the fire pump motor(s).The overcurrent protective device shall not open within 10 minutes at 300 percent of the full-load current of the fire pump motor(s).The trip point for circuit breakers shall not be field adjustable. [20:9.2.3.4.1]On-Site Standby Generators. Overcurrent protective devices between an on-site standby generator and a fire pump controller shall be selected and sized to allow for instantaneous pickup of the full pump room load, but shall not be larger than the value selected to comply with 430.62 to provide short-circuit protection only. [20:9.6.1.1]", + "displayTitle": "(2) Overcurrent Device Selection", + "children": [], + "url": "https://2023.antflix.net#695.4_(B)_(2)" + }, + { + "body": "All disconnecting devices that are unique to the fire pump loads shall comply with items 695.4(B)(3)(a) through (B)(3)(e).\n\n\nFeatures and Location - Normal Power Source. The disconnecting means for the normal power source shall comply with all of the following: [20:9.2.3.1]\n\nBe identified as suitable for use as service equipment.\nBe lockable in the closed position. The provision for locking or adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and shall remain in place with or without the lock installed.\nNot be located within the same enclosure, panelboard, switchboard, switchgear, or motor control center, with or without common bus, that supplies loads other than the fire pump.\n\nBe located sufficiently remote from other building or other fire pump source disconnecting means such that inadvertent operation at the same time would be unlikely.\nException to 695.4(B)(3)(a): For a multibuilding campus-style complex(s) installed under the provisions of 695.3(C), only the requirements in 695.4(B)(3)(a)(2) shall apply for normal power source disconnects.\n\n\n\nFeatures and Location - On-Site Standby Generator. The disconnecting means for an on-site standby generator(s) used as the alternate power source shall be installed in accordance with 700.10(B)(6) for emergency circuits and shall be lockable in the closed position. The provision for locking or adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and shall remain in place with or without the lock installed.\nDisconnect Marking. The disconnecting means shall be marked \"Fire Pump Disconnecting Means.\" The letters shall be at least 25 mm (1 in.) in height, and they shall be visible without opening enclosure doors or covers. [20:9.2.3.1 (5)]\nController Marking. A placard shall be placed adjacent to the fire pump controller, stating the location of this disconnecting means and the location of the key (if the disconnecting means is locked). [20:9.2.3.2]\n\nSupervision. The disconnecting means shall be supervised in the closed position by one of the following methods:\n\nCentral station, proprietary, or remote station signal device\nLocal signaling service that causes the sounding of an audible signal at a constantly attended point\nLocking the disconnecting means in the closed position\nSealing of disconnecting means and approved weekly recorded inspections when the disconnecting means are located within fenced enclosures or in buildings under the control of the owner [20:9.2.3.3]\n\n\n", + "displayTitle": "(3) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#695.4_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#695.4_(B)" + } + ], + "url": "https://2023.antflix.net#695.4" + }, + { + "body": "Where the service or system voltage is different from the utilization voltage of the fire pump motor, transformer(s) protected by disconnecting means and overcurrent protective devices shall be permitted to be installed between the system supply and the fire pump controller in accordance with 695.5(A) and (B), or with (C). Only transformers covered in 695.5(C) shall be permitted to supply loads not directly associated with the fire pump system.", + "displayTitle": "695.5 Transformers", + "children": [ + { + "body": "Where a transformer supplies an electric motor driven fire pump, it shall be rated at a minimum of 125 percent of the sum of the fire pump motor(s) and pressure maintenance pump(s) motor loads, and 100 percent of the associated fire pump accessory equipment supplied by the transformer.", + "displayTitle": "(A) Size", + "children": [], + "url": "https://2023.antflix.net#695.5_(A)" + }, + { + "body": "The primary overcurrent protective device(s) shall be selected or set to carry indefinitely the sum of the locked-rotor current of the fire pump motor(s) and the pressure maintenance pump motor(s) and the full-load current of the associated fire pump accessory equipment when connected to this power supply. Secondary overcurrent protection shall not be permitted. The requirement to carry the locked-rotor currents indefinitely shall not apply to conductors or devices other than overcurrent devices in the fire pump motor circuit(s).", + "displayTitle": "(B) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#695.5_(B)" + }, + { + "body": "Where a feeder source is provided in accordance with 695.3(C), transformers supplying the fire pump system shall be permitted to supply other loads. All other loads shall be calculated in accordance with Article 220, including demand factors as applicable.", + "displayTitle": "(C) Feeder Source", + "children": [ + { + "body": "Transformers shall be rated at a minimum of 125 percent of the sum of the fire pump motor(s) and pressure maintenance pump(s) motor loads, and 100 percent of the remaining load supplied by the transformer.", + "displayTitle": "(1) Size", + "children": [], + "url": "https://2023.antflix.net#695.5_(C)_(1)" + }, + { + "body": "The transformer size, the feeder size, and the overcurrent protective device(s) shall be coordinated such that overcurrent protection is provided for the transformer in accordance with 450.3 and for the feeder in accordance with 215.3, and such that the overcurrent protective device(s) is selected or set to carry indefinitely the sum of the locked-rotor current of the fire pump motor(s), the pressure maintenance pump motor(s), the full-load current of the associated fire pump accessory equipment, and 100 percent of the remaining loads supplied by the transformer. The requirement to carry the locked-rotor currents indefinitely shall not apply to conductors or devices other than overcurrent devices in the fire pump motor circuit(s).", + "displayTitle": "(2) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#695.5_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#695.5_(C)" + } + ], + "url": "https://2023.antflix.net#695.5" + }, + { + "body": "Power circuits and wiring methods shall comply with the requirements in 695.6(A) through (J), and as permitted in 230.90(A), Exception No. 4; 230.94, Exception No. 4; 240.13; 230.208; 240.4(A); and 430.31.", + "displayTitle": "695.6 Power Wiring", + "children": [ + { + "displayTitle": "(A) Supply Conductors", + "children": [ + { + "body": "Service conductors and conductors supplied by on-site power production facilities shall be physically routed outside a building(s) and shall be installed as service-entrance conductors in accordance with 230.6, 230.9, and Parts III and IV of Article 230. Where supply conductors cannot be physically routed outside of buildings, the conductors shall be permitted to be routed through the building(s) where installed in accordance with 230.6(1) or (2). Exception: The supply conductors within the fire pump room shall not be required to meet 230.6(1) or (2). Informational Note: See 250.24(C) for routing the grounded conductor to the service equipment.", + "displayTitle": "(1) Services and On-Site Power Production Facilities", + "children": [], + "url": "https://2023.antflix.net#695.6_(A)_(1)" + }, + { + "body": "Fire pump supply conductors on the load side of the final disconnecting means and overcurrent device(s) permitted by 695.4(B) or conductors that connect directly to an on-site standby generator shall comply with all of the following: Independent Routing. The conductors shall be kept entirely independent of all other wiring.Associated Fire Pump Loads. The conductors shall supply only loads that are directly associated with the fire pump system.Protection from Potential Damage. The conductors shall be protected from potential damage by fire, structural failure, or operational accident.Inside of a Building. Where routed through a building, the conductors shall be protected from fire for 2 hours using one of the following methods:The cable or raceway is encased in a minimum 50 mm (2 in.) of concrete.The cable or raceway is part of a listed fire-resistive cable system.Informational Note No. 1: See UL 2196, Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for one method of defining a fire-resistive cable system.Informational Note No. 2: See UL Guide Information for Electrical Circuit Integrity Systems (FHIT) for identifying the system and its installation limitations to maintain a minimum 2-hour fire-resistive rating.Informational Note No. 3: The listing organization provides information for fire-resistive cable systems on proper installation requirements to maintain the fire rating.The cable or raceway is protected by a listed electrical circuit protective system.Informational Note No. 4: See UL 1724, Fire Tests for Electrical Circuit Protective Systems, for one method of defining an electrical circuit protective system.Informational Note No. 5: See UL Guide Information for Electrical Circuit Integrity Systems (FHIT) for identifying the system and its installation limitations to maintain a minimum 2-hour fire-resistive rating.Informational Note No. 6: The listing organization provides information for electrical circuit protective systems on proper installation requirements to maintain the fire rating.Exception to 695.6(A)(2)(4): The supply conductors located in the electrical equipment room where they originate and in the fire pump room shall not be required to have the minimum 2-hour fire separation or fire-resistance rating unless otherwise required by 700.10(D) of this Code.", + "displayTitle": "(2) Feeders", + "children": [], + "url": "https://2023.antflix.net#695.6_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#695.6_(A)" + }, + { + "displayTitle": "(B) Conductor Size", + "children": [ + { + "body": "Conductors supplying a fire pump motor(s), pressure maintenance pumps, and associated fire pump accessory equipment shall have an ampacity of not less than the sum of the following: 125 percent of the sum of the fire pump motor(s) and pressure maintenance motor(s) full-load current(s), as determined by 430.6(A)100 percent of the associated fire pump accessory equipment full-load current(s)", + "displayTitle": "(1) Fire Pump Motors and Other Equipment", + "children": [], + "url": "https://2023.antflix.net#695.6_(B)_(1)" + }, + { + "body": "Conductors supplying only a fire pump motor shall have a minimum ampacity in accordance with 430.22 and shall comply with the voltage drop requirements in 695.7.", + "displayTitle": "(2) Fire Pump Motors Only", + "children": [], + "url": "https://2023.antflix.net#695.6_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#695.6_(B)" + }, + { + "body": "Power circuits shall not have automatic protection against overloads. Except for protection of transformer primaries provided in 695.5(C)(2), branch-circuit and feeder conductors shall be protected against short circuit only. Where a tap is made to supply a fire pump, the wiring shall be treated as service conductors in accordance with 230.6. The applicable distance and size restrictions in 240.21 shall not apply. Exception No. 1: Conductors between storage batteries and the engine shall not require overcurrent protection or disconnecting means. Exception No. 2: For an on-site standby generator(s) rated to produce continuous current in excess of 225 percent of the full-load amperes of the fire pump motor, the conductors between the on-site generator(s) and the combination fire pump transfer switch controller or separately mounted transfer switch shall be installed in accordance with 695.6(A)(2). The protection provided shall be in accordance with the short-circuit current rating of the combination fire pump transfer switch controller or separately mounted transfer switch.", + "displayTitle": "(C) Overload Protection", + "children": [], + "url": "https://2023.antflix.net#695.6_(C)" + }, + { + "displayTitle": "(D) Pump Wiring", + "children": [ + { + "body": "Wiring from the controller(s) to the pump motor shall be in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, liquidtight flexible metal conduit, or liquidtight flexible nonmetallic conduit LFNC-B, listed Type MC cable with an impervious covering, or Type MI cable. [20:9.4.4.1]", + "displayTitle": "(1) Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#695.6_(D)_(1)" + }, + { + "body": "Fittings shall be listed for use in wet locations.", + "displayTitle": "(2) Fittings", + "children": [], + "url": "https://2023.antflix.net#695.6_(D)_(2)" + }, + { + "body": "Electrical connections at motor terminal boxes shall be made with a listed means of connection. Twist-on, insulation-piercing-type, and soldered wire connectors shall not be used for this purpose. [20: 9.4.4.2, 9.4.4.3]", + "displayTitle": "(3) Connections", + "children": [], + "url": "https://2023.antflix.net#695.6_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#695.6_(D)" + }, + { + "body": "A fire pump controller and fire pump power transfer switch, if provided, shall not serve any load other than the fire pump for which it is intended.", + "displayTitle": "(E) Loads Supplied by Controllers and Transfer Switches", + "children": [], + "url": "https://2023.antflix.net#695.6_(E)" + }, + { + "body": "All wiring from engine controllers and batteries shall be protected against physical damage and shall be installed in accordance with the controller and engine manufacturer's instructions.", + "displayTitle": "(F) Mechanical Protection", + "children": [], + "url": "https://2023.antflix.net#695.6_(F)" + }, + { + "body": "Ground-fault protection of equipment shall not be installed in any fire pump power circuit. [20:9.1.8.1]", + "displayTitle": "(G) Ground-Fault Protection of Equipment", + "children": [], + "url": "https://2023.antflix.net#695.6_(G)" + }, + { + "body": "Electrical circuit protective system installation shall comply with any restrictions provided in the listing of the electrical circuit protective system used, and the following also shall apply: A junction box shall be installed ahead of the fire pump controller a minimum of 300 mm (12 in.) beyond the fire-rated ceiling, wall, or floor bounding the fire zone.Where required by the manufacturer of a listed electrical circuit protective system or by the listing, or as required elsewhere in this Code, the raceway between a junction box and the fire pump controller shall be sealed at the junction box end as required and in accordance with the instructions of the manufacturer. [20:9.8.2]Standard wiring between the junction box and the controller shall be permitted. [20:9.8.3]", + "displayTitle": "(H) Listed Electrical Circuit Protective System to Controller Wiring", + "children": [], + "url": "https://2023.antflix.net#695.6_(H)" + }, + { + "body": "Where fire pump wiring to or from a fire pump controller is routed through a junction box, the following requirements shall be met: The junction box shall be securely mounted. [20:9.7(1)]Mounting and installing of a junction box shall not violate the enclosure type rating of the fire pump controller(s). [20:9.7(2)]Mounting and installing of a junction box shall not violate the integrity of the fire pump controller(s) and shall not affect the short-circuit current rating of the controller(s).As a minimum, a Type 2, drip-proof enclosure (junction box) shall be used where installed in the fire pump room. The enclosure shall be listed to match the fire pump controller enclosure type rating. [20:9.7(4)]Terminals, junction blocks, wire connectors, and splices, where used, shall be listed. [20:9.7(5)]A fire pump controller or fire pump power transfer switch, where provided, shall not be used as a junction box to supply other equipment, including a pressure maintenance (jockey) pump(s).", + "displayTitle": "(I) Junction Boxes", + "children": [], + "url": "https://2023.antflix.net#695.6_(I)" + }, + { + "body": "Where raceways or cable are terminated at a fire pump controller, the following requirements shall be met: Raceway or cable fittings listed and identified for use in wet locations shall be used.The type rating of the raceway or cable fittings shall be at least equal to that of the fire pump controller.The installation instructions of the manufacturer of the fire pump controller shall be followed.Alterations to the fire pump controller, other than raceway or cable terminations as allowed elsewhere in this Code, shall be approved by the authority having jurisdiction.", + "displayTitle": "(J) Terminations", + "children": [], + "url": "https://2023.antflix.net#695.6_(J)" + } + ], + "url": "https://2023.antflix.net#695.6" + }, + { + "displayTitle": "695.7 Voltage Drop", + "children": [ + { + "body": "Unless the requirements of 695.7(B) or (C) are met, the voltage at the fire pump controller line terminals shall not drop more than 15 percent below normal (controller-rated voltage) under motor starting conditions. [20:9.4.1]", + "displayTitle": "(A) Motor Starting", + "children": [], + "url": "https://2023.antflix.net#695.7_(A)" + }, + { + "body": "The requirements of 695.7(A) shall not apply to emergency-run mechanical starting, provided a successful start can be demonstrated on the standby generator system. [20:9.4.2]", + "displayTitle": "(B) Emergency Run", + "children": [], + "url": "https://2023.antflix.net#695.7_(B)" + }, + { + "body": "The requirements of 695.7(A) shall not apply to the bypass mode of a variable speed pressure limiting control, provided a successful start can be demonstrated on the standby gen-set. [20:9.4.3]", + "displayTitle": "(C) Bypass Mode", + "children": [], + "url": "https://2023.antflix.net#695.7_(C)" + }, + { + "body": "The voltage at the contactor load terminals to which the motor is connected shall not drop more than 5 percent below the voltage rating of the motor when the motor is operating at 115 percent of the full-load current rating of the motor. [20:9.4.4]", + "displayTitle": "(D) Motor Running", + "children": [], + "url": "https://2023.antflix.net#695.7_(D)" + } + ], + "url": "https://2023.antflix.net#695.7" + }, + { + "body": "Diesel engine fire pump controllers, electric fire pump controllers, electric motors, fire pump power transfer switches, foam pump controllers, and limited service controllers shall be listed for fire pump service. [20:9.5.1.1, 10.1.2.1, 12.1.3.1]", + "displayTitle": "695.10 Listed Equipment", + "children": [], + "url": "https://2023.antflix.net#695.10" + }, + { + "displayTitle": "695.12 Equipment Location", + "children": [ + { + "body": "Electric motor-driven fire pump controllers and power transfer switches shall be located as close as practicable to, and within sight of, the motors that they control.", + "displayTitle": "(A) Controllers and Transfer Switches", + "children": [], + "url": "https://2023.antflix.net#695.12_(A)" + }, + { + "body": "Engine-drive fire pump controllers shall be located as close as is practical to, and within sight of, the engines that they control.", + "displayTitle": "(B) Engine-Drive Controllers", + "children": [], + "url": "https://2023.antflix.net#695.12_(B)" + }, + { + "body": "Storage batteries for fire pump engine drives shall be supported above the floor, secured against displacement, and located where they are not subject to physical damage, flooding with water, excessive temperature, or excessive vibration.", + "displayTitle": "(C) Storage Batteries", + "children": [], + "url": "https://2023.antflix.net#695.12_(C)" + }, + { + "body": "All energized equipment parts shall be located at least 300 mm (12 in.) above the floor level.", + "displayTitle": "(D) Energized Equipment", + "children": [], + "url": "https://2023.antflix.net#695.12_(D)" + }, + { + "body": "Fire pump controller and power transfer switches shall be located or protected so that they are not damaged by water escaping from pumps or pump connections.", + "displayTitle": "(E) Protection Against Pump Water", + "children": [], + "url": "https://2023.antflix.net#695.12_(E)" + }, + { + "body": "All fire pump control equipment shall be mounted in a substantial manner on noncombustible supporting structures.", + "displayTitle": "(F) Mounting", + "children": [], + "url": "https://2023.antflix.net#695.12_(F)" + } + ], + "url": "https://2023.antflix.net#695.12" + }, + { + "displayTitle": "695.14 Control Wiring", + "children": [ + { + "body": "External control circuits that extend outside the fire pump room shall be arranged so that failure of any external circuit (open or short circuit) shall not prevent the operation of a pump(s) from all other internal or external means. Breakage, disconnecting, shorting of the wires, or loss of power to these circuits could cause continuous running of the fire pump but shall not prevent the controller(s) from starting the fire pump(s) due to causes other than these external control circuits. All control conductors within the fire pump room that are not fault tolerant shall be protected against physical damage. [20:10.5.2.6, 12.5.2.5]", + "displayTitle": "(A) Control Circuit Failures", + "children": [], + "url": "https://2023.antflix.net#695.14_(A)" + }, + { + "body": "No undervoltage, phase-loss, frequency-sensitive, or other sensor(s) shall be installed that automatically or manually prohibits actuation of the motor contactor. [20:10.4.5.6] Exception: A phase-loss sensor(s) shall be permitted only as a part of a listed fire pump controller.", + "displayTitle": "(B) Sensor Functioning", + "children": [], + "url": "https://2023.antflix.net#695.14_(B)" + }, + { + "body": "No remote device(s) shall be installed that will prevent automatic operation of the transfer switch. [20:10.8.1.3]", + "displayTitle": "(C) Remote Device(s)", + "children": [], + "url": "https://2023.antflix.net#695.14_(C)" + }, + { + "body": "All wiring between the controller and the diesel engine shall be stranded and sized to continuously carry the charging or control currents as required by the controller manufacturer. Such wiring shall be protected against physical damage. Controller manufacturer's specifications for distance and wire size shall be followed. [20:12.3.5.1]", + "displayTitle": "(D) Engine-Drive Control Wiring", + "children": [], + "url": "https://2023.antflix.net#695.14_(D)" + }, + { + "body": "All electric motor-driven fire pump control wiring shall be in rigid metal conduit, intermediate metal conduit, liquidtight flexible metal conduit, electrical metallic tubing, liquidtight flexible nonmetallic conduit, listed Type MC cable with an impervious covering, or Type MI cable.", + "displayTitle": "(E) Electric Fire Pump Control Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#695.14_(E)" + }, + { + "body": "Control conductors installed between the fire pump power transfer switch and the standby generator supplying the fire pump during normal power loss shall be kept entirely independent of all other wiring. The integrity of the generator remote start circuit shall be monitored for broken, disconnected, or shorted wires. Loss of integrity shall start the generator(s). Informational Note: See NFPA 20-2019, Standard for the Installation of Stationary Pumps for Fire Protection, 3.3.7.2, for more information on fault-tolerant external control circuits. The control conductors shall be protected to resist potential damage by fire or structural failure. Where routed through a building, the conductors shall be protected from fire for 2 hours using one of the following methods:The cable or raceway is encased in a minimum 50 mm (2 in.) of concrete.The cable or raceway is part of a listed fire-resistive cable system.Informational Note No. 1: See UL 2196-2017, Standard for Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for testing requirements for fire-resistive cables.Informational Note No. 2: The listing organization provides information for fire-resistive cable systems on proper installation requirements to maintain the fire rating.The cable or raceway is protected by a listed electrical circuit protective system.Informational Note No. 3: See UL 1724, Fire Tests for Electrical Circuit Protection Systems, for testing requirements for circuit protective systems.Informational Note No. 4: Electrical circuit protective systems could include, but are not limited to, thermal barriers or a protective shaft.Informational Note No. 5: The listing organization provides information for electrical circuit protective systems on proper installation requirements to maintain the fire rating.", + "displayTitle": "(F) Generator Control Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#695.14_(F)" + } + ], + "url": "https://2023.antflix.net#695.14" + }, + { + "body": "A listed surge protective device (SPD) shall be installed in or on the fire pump controller. Informational Note: See UL 1449-2021, Standard for Surge Protective Devices, for proper application of SPD types. Exception: Surge-protective devices shall not be required in or on a fire pump controller for diesel fire pumps.", + "displayTitle": "695.15 Surge Protection", + "children": [], + "url": "https://2023.antflix.net#695.15" + } + ], + "url": "https://2023.antflix.net#695" + } + ], + "url": "https://2023.antflix.net#6" + } + ], + "Chapter 7 Special Conditions": [ + { + "displayTitle": "Chapter 7 Special Conditions", + "children": [ + { + "displayTitle": "Article 700 Emergency Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_107_I" + }, + { + "body": "This article applies to the electrical safety of the installation, operation, and maintenance of emergency systems consisting of circuits and equipment intended to supply, distribute, and control electricity for illumination, power, or both, to required facilities when the normal electrical supply or system is interrupted. Informational Note No. 1: Emergency systems are generally installed in places of assembly where artificial illumination is required for safe exiting and for panic control in buildings subject to occupancy by large numbers of persons, such as hotels, theaters, sports arenas, health care facilities, and similar institutions. Emergency systems may also provide power for such functions as ventilation where essential to maintain life, fire detection and alarm systems, elevators, fire pumps, public safety communications systems, industrial processes where current interruption would produce serious life safety or health hazards, and similar functions. Informational Note No. 2: See Article 517, Health Care Facilities, for further information regarding wiring and installation of emergency systems in health care facilities. Informational Note No. 3: See NFPA 99-2018, Health Care Facilities Code, for further information regarding performance and maintenance of emergency systems in health care facilities. Informational Note No. 4: See NFPA 101-2018, Life Safety Code, for specification of locations where emergency lighting is considered essential to life safety. Informational Note No. 5: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, and NFPA 111-2019, Standard on Stored Electrical Energy Emergency and Standby Power Systems, for further information regarding performance of emergency and standby power systems. Emergency systems are considered Level 1 systems when applying NFPA 110. [700.1](https://2023.antflix.net#700.1)", + "displayTitle": "700.1 Scope", + "children": [], + "url": "https://2023.antflix.net#700.1" + }, + { + "body": "Reconditioned transfer switches shall not be permitted. [700.2](https://2023.antflix.net#700.2)", + "displayTitle": "700.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#700.2" + }, + { + "displayTitle": "700.3 Tests and Maintenance", + "children": [ + { + "body": "The authority having jurisdiction shall conduct or witness the commissioning of the complete system upon installation and periodically afterward. Informational Note: See NECA 90, Standard for Commissioning Building Electrical Systems. [700.3_(A)](https://2023.antflix.net#700.3_(A))", + "displayTitle": "(A) Commissioning Witness Test", + "children": [], + "url": "https://2023.antflix.net#700.3_(A)" + }, + { + "body": "Systems shall be tested periodically on a schedule approved by the authority having jurisdiction to ensure the systems are maintained in proper operating condition. [700.3_(B)](https://2023.antflix.net#700.3_(B))", + "displayTitle": "(B) Tested Periodically", + "children": [], + "url": "https://2023.antflix.net#700.3_(B)" + }, + { + "body": "Emergency system equipment shall be maintained in accordance with manufacturer instructions and industry standards. [700.3_(C)](https://2023.antflix.net#700.3_(C))", + "displayTitle": "(C) Maintenance", + "children": [], + "url": "https://2023.antflix.net#700.3_(C)" + }, + { + "body": "A written record shall be kept of such tests and maintenance. [700.3_(D)](https://2023.antflix.net#700.3_(D))", + "displayTitle": "(D) Written Record", + "children": [], + "url": "https://2023.antflix.net#700.3_(D)" + }, + { + "body": "Means for testing all emergency lighting and power systems during maximum anticipated load conditions shall be provided. Informational Note: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, for information on testing and maintenance of emergency power supply systems (EPSSs). [700.3_(E)](https://2023.antflix.net#700.3_(E))", + "displayTitle": "(E) Testing Under Load", + "children": [], + "url": "https://2023.antflix.net#700.3_(E)" + }, + { + "body": "If the emergency system relies on a single alternate source of power, which will be disabled for maintenance or repair, the emergency system shall include permanent switching means to connect a portable or temporary alternate source of power that shall be available for the duration of the maintenance or repair. The permanent switching means to connect a portable or temporary alternate source of power shall comply with the following: Connection to the portable or temporary alternate source of power shall not require modification of the permanent system wiring.Transfer of power between the normal power source and the emergency power source shall be in accordance with 700.12.The connection point for the portable or temporary alternate source shall be marked with the phase rotation and system bonding requirements.The switching means, including the interlocks, shall be listed and provided with mechanical or mechanical and electrical interlocking to prevent inadvertent interconnection of power sources.The switching means shall include a contact point that shall annunciate at a location remote from the generator or at another facility monitoring system to indicate that the permanent emergency source is disconnected from the emergency system.The permanent connection point for the temporary generator shall be located outdoors and shall not have cables from the connection point to the temporary generator routed through exterior windows, doors, or similar openings.A permanent label shall be field applied at the permanent connection point to identify the system voltage, maximum amperage, short-circuit current rating of the load side of equipment supplied, and ungrounded conductor identification in accordance with 210.5.It shall be permissible to use manual switching to switch from the permanent source of power to the portable or temporary alternate source of power and to use the switching means for connection of a load bank.Informational Note: See Informational Note Figure 700.3(F) for one example of many possible methods to achieve the requirements of 700.3(F).Exception: The permanent switching means to connect a portable or temporary alternate source of power for the duration of the maintenance or repair shall not be required where any of the following conditions exists:All processes that rely on the emergency system source are capable of being disabled during maintenance or repair of the emergency source of power.The building or structure is unoccupied and fire protection systems are fully functional and do not require an alternate power source.Other temporary means can be substituted for the emergency system.A permanent alternate emergency source, such as, but not limited to, a second on-site standby generator or separate electric utility service connection, capable of supporting the emergency system, exists.Informational Note Figure 700.3(F) [700.3_(F)](https://2023.antflix.net#700.3_(F))", + "displayTitle": "(F) Temporary Source of Power for Maintenance or Repair of the Alternate Source of Power", + "children": [], + "url": "https://2023.antflix.net#700.3_(F)" + } + ], + "url": "https://2023.antflix.net#700.3" + }, + { + "displayTitle": "700.4 Capacity and Rating", + "children": [ + { + "body": "An emergency system shall have adequate capacity in accordance with Parts I through IV of Article 220 or by another approved method. The system capacity shall be sufficient for the rapid load changes and transient power and energy requirements associated with any expected loads. [700.4_(A)](https://2023.antflix.net#700.4_(A))", + "displayTitle": "(A) Capacity", + "children": [], + "url": "https://2023.antflix.net#700.4_(A)" + }, + { + "body": "The alternate power source shall be permitted to supply emergency, legally required standby, and optional standby system loads where the source has adequate capacity or where load management (that includes automatic selective load pickup and load shedding) is provided as needed to ensure adequate power to the following in order of priority: Emergency circuitsLegally required standby circuitsOptional standby circuits [700.4_(B)](https://2023.antflix.net#700.4_(B))", + "displayTitle": "(B) Selective Load Management", + "children": [], + "url": "https://2023.antflix.net#700.4_(B)" + }, + { + "body": "Parallel operation of the emergency source(s) shall consist of the sources specified in 700.4(C)(1) and (C)(2). [700.4_(C)](https://2023.antflix.net#700.4_(C))", + "displayTitle": "(C) Parallel Operation", + "children": [ + { + "body": "The emergency source shall be permitted to operate in parallel with the normal source in compliance with Part I or Part II of Article 705 where the capacity required to supply the emergency load is maintained at all times. Any operating condition that results in less than the required emergency source capacity shall initiate a system malfunction signal in accordance with 700.6(A). Parallel operation shall be permitted for satisfying the test requirements of 700.3(B), provided all other conditions of 700.3 are met. Informational Note: Peak load shaving is one application for parallel source operation. [700.4_(C)_(1)](https://2023.antflix.net#700.4_(C)_(1))", + "displayTitle": "(1) Normal Source", + "children": [], + "url": "https://2023.antflix.net#700.4_(C)_(1)" + }, + { + "body": "Emergency sources shall be permitted to operate in parallel where the necessary equipment to establish and maintain a synchronous condition is provided. [700.4_(C)_(2)](https://2023.antflix.net#700.4_(C)_(2))", + "displayTitle": "(2) Emergency Source", + "children": [], + "url": "https://2023.antflix.net#700.4_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#700.4_(C)" + } + ], + "url": "https://2023.antflix.net#700.4" + }, + { + "displayTitle": "700.5 Transfer Equipment", + "children": [ + { + "body": "Transfer equipment shall be automatic, listed, and marked for emergency use. Transfer equipment shall be designed and installed to prevent the inadvertent interconnection of normal and emergency sources of supply in any operation of the transfer equipment. Transfer equipment and electric power production systems installed to permit operation in parallel with the normal source shall meet the requirements of Article 705. Meter-mounted transfer switches shall not be permitted for emergency system use. [700.5_(A)](https://2023.antflix.net#700.5_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#700.5_(A)" + }, + { + "body": "Means shall be permitted to bypass and isolate the transfer equipment. Where bypass isolation transfer switches are used, inadvertent parallel operation shall be prevented. [700.5_(B)](https://2023.antflix.net#700.5_(B))", + "displayTitle": "(B) Bypass Isolation Transfer Switches", + "children": [], + "url": "https://2023.antflix.net#700.5_(B)" + }, + { + "body": "Automatic transfer switches shall be electrically operated and mechanically held. [700.5_(C)](https://2023.antflix.net#700.5_(C))", + "displayTitle": "(C) Automatic Transfer Switches", + "children": [], + "url": "https://2023.antflix.net#700.5_(C)" + }, + { + "body": "If emergency loads are supplied by a single feeder, the emergency power system shall include redundant transfer equipment or a bypass isolation transfer switch to facilitate maintenance as required in 700.3(C) without jeopardizing continuity of power. If the redundant transfer equipment or bypass isolation transfer switch is manual (or nonautomatic), then it shall be actively supervised by a qualified person when the primary (automatic) transfer equipment is disabled for maintenance or repair. Exception: The requirement for redundancy with the transfer equipment shall not apply where any of the following conditions exist: (1) All processes that rely on the emergency system source are capable of being disabled during maintenance or repair activities without jeopardizing the safety to human life. (2) The building or structure is unoccupied and fire protection systems are fully functional and do not require an alternate power source. (3) Other temporary means shall be permitted to be substituted for the emergency system. (4) A written emergency plan that includes mitigation actions and responsibilities for qualified persons to address the recognized site hazards for the duration of the maintenance or repair activities shall be developed and implemented. The emergency plan shall be made available to the authority having jurisdiction. [700.5_(D)](https://2023.antflix.net#700.5_(D))", + "displayTitle": "(D) Redundant Transfer Equipment", + "children": [], + "url": "https://2023.antflix.net#700.5_(D)" + }, + { + "body": "Transfer equipment shall supply only emergency loads. Informational Note: Transfer equipment that supplies emergency loads provides separation of this load type from any others and is independent of any equipment used to combine or parallel sources. [700.5_(E)](https://2023.antflix.net#700.5_(E))", + "displayTitle": "(E) Use", + "children": [], + "url": "https://2023.antflix.net#700.5_(E)" + }, + { + "body": "The short-circuit current rating of the transfer equipment, based on the specific overcurrent protective device type and settings protecting the transfer equipment, shall be field marked on the exterior of the transfer equipment. [700.5_(F)](https://2023.antflix.net#700.5_(F))", + "displayTitle": "(F) Documentation", + "children": [], + "url": "https://2023.antflix.net#700.5_(F)" + } + ], + "url": "https://2023.antflix.net#700.5" + }, + { + "body": "Audible, visual, and facility or network remote annunciation devices shall be provided, where applicable, for the purpose described in 700.6(A) through (D). [700.6](https://2023.antflix.net#700.6)", + "displayTitle": "700.6 Signals", + "children": [ + { + "body": "Malfunction signals indicate a malfunction of the emergency source. [700.6_(A)](https://2023.antflix.net#700.6_(A))", + "displayTitle": "(A) Malfunction", + "children": [], + "url": "https://2023.antflix.net#700.6_(A)" + }, + { + "body": "Load carrying signals indicate that the emergency source is carrying load. [700.6_(B)](https://2023.antflix.net#700.6_(B))", + "displayTitle": "(B) Carrying Load", + "children": [], + "url": "https://2023.antflix.net#700.6_(B)" + }, + { + "body": "Storage battery charging malfunction signals indicate a charging malfunction on a battery required for source readiness, including starting the prime mover, is not functioning. [700.6_(C)](https://2023.antflix.net#700.6_(C))", + "displayTitle": "(C) Storage Battery Charging Malfunction", + "children": [], + "url": "https://2023.antflix.net#700.6_(C)" + }, + { + "body": "Ground-fault signals indicate a ground fault in solidly grounded wye emergency systems of more than 150 volts to ground and circuit-protective devices rated 1000 amperes or more. The sensor for the ground-fault signal devices shall be located at, or ahead of, the main system disconnecting means for the emergency source, and the maximum setting of the signal devices shall be for a ground-fault current of 1200 amperes. Instructions on the course of action to be taken in the event of indicated ground fault shall be located at or near the sensor location. For systems with multiple emergency sources connected to a paralleling bus, the ground fault sensor and the system bonding jumper shall be permitted to be at an alternative location. [700.6_(D)](https://2023.antflix.net#700.6_(D))", + "displayTitle": "(D) Ground Fault", + "children": [], + "url": "https://2023.antflix.net#700.6_(D)" + } + ], + "url": "https://2023.antflix.net#700.6" + }, + { + "displayTitle": "700.7 Signs", + "children": [ + { + "body": "A sign shall be placed at the service-entrance equipment, indicating type and location of each on-site emergency power source. Exception: A sign shall not be required for individual unit equipment as specified in 700.12(H). [700.7_(A)](https://2023.antflix.net#700.7_(A))", + "displayTitle": "(A) Emergency Sources", + "children": [], + "url": "https://2023.antflix.net#700.7_(A)" + }, + { + "body": "Where removal of a grounding or bonding connection in normal power source equipment interrupts the grounding electrode conductor connection to the alternate power source(s) grounded conductor, a warning sign shall be installed at the normal power source equipment stating: WARNINGSHOCK HAZARD EXISTS IF GROUNDING ELECTRODE CONDUCTOR OR BONDING JUMPER CONNECTION IN THIS EQUIPMENT IS REMOVED WHILE ALTERNATE SOURCE(S) IS ENERGIZED. The warning sign(s) or label(s) shall comply with 110.21(B). [700.7_(B)](https://2023.antflix.net#700.7_(B))", + "displayTitle": "(B) Grounding", + "children": [], + "url": "https://2023.antflix.net#700.7_(B)" + } + ], + "url": "https://2023.antflix.net#700.7" + }, + { + "body": "A listed SPD shall be installed in or on all emergency system switchgear, switchboards, and panelboards. [700.8](https://2023.antflix.net#700.8)", + "displayTitle": "700.8 Surge Protection", + "children": [], + "url": "https://2023.antflix.net#700.8" + }, + { + "displayTitle": "Part II Circuit Wiring", + "children": [], + "url": "https://2023.antflix.net#divider_107_II" + }, + { + "displayTitle": "700.10 Wiring, Emergency System", + "children": [ + { + "body": "Emergency circuits shall be permanently marked so they will be readily identified as a component of an emergency circuit or system by the following methods: All boxes and enclosures (including transfer switches, generators, and power panels) for emergency circuits shall be permanently marked as a component of an emergency circuit or system.Where boxes or enclosures are not encountered, exposed cable or raceway systems shall be permanently marked to be identified as a component of an emergency circuit or system, at intervals not to exceed 7.6 m (25 ft).Receptacles supplied from the emergency system shall have a distinctive color or marking on the receptacle cover plates or the receptacles. [700.10_(A)](https://2023.antflix.net#700.10_(A))", + "displayTitle": "(A) Identification", + "children": [], + "url": "https://2023.antflix.net#700.10_(A)" + }, + { + "body": "Wiring from an emergency source or emergency source distribution overcurrent protection to emergency loads shall be kept entirely independent of all other wiring and equipment unless otherwise permitted in the following: Wiring from the normal power source located in transfer equipment enclosuresWiring supplied from two sources in exit or emergency luminairesWiring from two sources in a listed load control relay supplying exit or emergency luminaires, or in a common junction box, attached to exit or emergency luminairesWiring within a common junction box attached to unit equipment, containing only the branch circuit supplying the unit equipment and the emergency circuit supplied by the unit equipmentWiring within a traveling cable to an elevatorWiring from an emergency source to supply emergency and other (nonemergency) loads in accordance with the following:Separate vertical switchgear sections or separate vertical switchboard sections, with or without a common bus, or individual disconnects mounted in separate enclosures shall be used to separate emergency loads from all other loads.The common bus of separate sections of the switchgear, separate sections of the switchboard, or the individual enclosures shall be either of the following:Supplied by single or multiple feeders without overcurrent protection at the sourceSupplied by single or multiple feeders with overcurrent protection, provided that the overcurrent protection that is common to an emergency system and any nonemergency system(s) is selectively coordinated with the next downstream overcurrent protective device in the nonemergency system(s)Informational Note: See Informational Note Figure 700.10(B)(1) and Informational Note Figure 700.10(B)(2) for further information.Emergency circuits shall not originate from the same vertical switchgear section, vertical switchboard section, panelboard enclosure, or individual disconnect enclosure as other circuits.It shall be permissible to use single or multiple feeders to supply distribution equipment between an emergency source and the point where the emergency loads are separated from all other loads.At the emergency power source, such as a generator, multiple integral overcurrent protective devices shall each be permitted to supply a designated emergency or a designated nonemergency load, provided that there is complete separation between emergency and nonemergency loads beginning immediately after the overcurrent protective device line-side connections.Wiring of two or more emergency circuits supplied from the same source shall be permitted in the same raceway, cable, box, or cabinet.Informational Note Figure 700.10(B)(1) Single or Multiple Feeders Without Overcurrent Protection.Informational Note Figure 700.10(B)(2) Single or Multiple Feeders with Overcurrent Protection. [700.10_(B)](https://2023.antflix.net#700.10_(B))", + "displayTitle": "(B) Wiring", + "children": [], + "url": "https://2023.antflix.net#700.10_(B)" + }, + { + "body": "Emergency wiring circuits shall be designed and located so as to minimize the hazards that might cause failure due to flooding, fire, icing, vandalism, and other adverse conditions. [700.10_(C)](https://2023.antflix.net#700.10_(C))", + "displayTitle": "(C) Wiring Design and Location", + "children": [], + "url": "https://2023.antflix.net#700.10_(C)" + }, + { + "displayTitle": "(D) Fire Protection", + "children": [ + { + "body": "Emergency systems shall meet the additional requirements in 700.10(D)(2) through (D)(4) in the following occupancies: Assembly occupancies for not less than 1000 personsBuildings above 23 m (75 ft) in heightEducational occupancies with more than 300 occupants [700.10_(D)_(1)](https://2023.antflix.net#700.10_(D)_(1))", + "displayTitle": "(1) Occupancies", + "children": [], + "url": "https://2023.antflix.net#700.10_(D)_(1)" + }, + { + "body": "Feeder-circuit wiring shall meet one of the following conditions: The cable or raceway is installed in spaces or areas that are fully protected by an approved automatic fire protection system.The cable or raceway is protected by a listed electrical circuit protective system with a minimum 2-hour fire rating.Informational Note No. 1: See UL 1724, Fire Tests for Electrical Circuit Protection Systems, for one method of defining an electrical circuit protective system. The UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information to identify the system and its installation limitations to maintain a minimum 2-hour fire-resistive rating and is available from the certification body.The cable or raceway is a listed fire-resistive cable system with a minimum 2-hour fire rating.Informational Note No. 2: See UL 2196-2017, Standard for Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for one method of defining a fire-resistive cable system.The cable or raceway is protected by a listed fire-rated assembly that has a minimum fire rating of 2 hours and contains only emergency circuits.The cable or raceway is encased in a minimum of 50 mm (2 in.) of concrete. [700.10_(D)_(2)](https://2023.antflix.net#700.10_(D)_(2))", + "displayTitle": "(2) Feeder-Circuit Wiring", + "children": [], + "url": "https://2023.antflix.net#700.10_(D)_(2)" + }, + { + "body": "Equipment for feeder circuits (including transfer switches, transformers, and panelboards) shall be located either in spaces fully protected by an approved automatic fire protection system or in spaces with a 2-hour fire resistance rating. [700.10_(D)_(3)](https://2023.antflix.net#700.10_(D)_(3))", + "displayTitle": "(3) Feeder-Circuit Equipment", + "children": [], + "url": "https://2023.antflix.net#700.10_(D)_(3)" + }, + { + "body": "Control conductors installed between the emergency power supply system/stored-energy power supply system (EPSS/SEPSS) and transfer equipment or control systems that initiate the operation of emergency sources or initiate the automatic connection to emergency loads shall be kept entirely independent of all other wiring and shall meet the conditions of 700.10(D)(2). The integrity of source control wiring shall be monitored for broken, disconnected, or shorted wires. Loss of integrity shall result in the following actions: Generators. Shall start the generator(s).All other sources. Shall be considered a system malfunction and initiate the designated signal(s) in 700.6(A). [700.10_(D)_(4)](https://2023.antflix.net#700.10_(D)_(4))", + "displayTitle": "(4) Source Control Wiring", + "children": [], + "url": "https://2023.antflix.net#700.10_(D)_(4)" + } + ], + "url": "https://2023.antflix.net#700.10_(D)" + } + ], + "url": "https://2023.antflix.net#700.10" + }, + { + "displayTitle": "700.11 Wiring, Class-2-Powered Emergency Lighting Systems", + "children": [ + { + "body": "Line voltage supply wiring and installation of Class 2 emergency lighting control devices shall comply with 700.10. Class 2 emergency circuits shall comply with 700.11 (B) through (D). [700.11_(A)](https://2023.antflix.net#700.11_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#700.11_(A)" + }, + { + "body": "Emergency circuits shall be permanently marked so they will be readily identified as a component of an emergency circuit or system by the following methods: All boxes and enclosures for Class 2 emergency circuits shall be permanently marked as a component of an emergency circuit or system.Exposed cable, cable tray, or raceway systems shall be permanently marked to be identified as a component of an emergency circuit or system, within 900 mm (3 ft) of each connector and at intervals not to exceed 7.6 m (25 ft). [700.11_(B)](https://2023.antflix.net#700.11_(B))", + "displayTitle": "(B) Identification", + "children": [], + "url": "https://2023.antflix.net#700.11_(B)" + }, + { + "body": "Class 2 emergency circuits shall be wired in a listed, jacketed cable or with one of the wiring methods of Chapter 3. If installed alongside nonemergency Class 2 circuits that are bundled, Class 2 emergency circuits shall be bundled separately. If installed alongside nonemergencv Class 2 circuits that are not bundled, Class 2 emergency circuits shall be separated by a nonconductive sleeve or nonconductive barrier from all other Class 2 circuits. Separation from other circuits shall comply with 725.136. [700.11_(C)](https://2023.antflix.net#700.11_(C))", + "displayTitle": "(C) Separation of Circuits", + "children": [], + "url": "https://2023.antflix.net#700.11_(C)" + }, + { + "body": "Wiring shall comply with the requirements of 300.4 and be installed in a raceway, armored or metal-clad cable, or cable tray. Exception Exception No. 1: Section 700.11(D) shall not apply to wiring that does not exceed 1.83 m (6 ft) in length and that terminates at an emergency luminaire or an emergency lighting control device. Exception Exception No. 2: Section 700.11(D) shall not apply to locked rooms or locked enclosures that are accessible only to qualified persons. Informational Note: Locked rooms accessible only to qualified persons include locked telecommunications rooms, locked electrical equipment rooms, or other access-controlled areas. [700.11_(D)](https://2023.antflix.net#700.11_(D))", + "displayTitle": "(D) Protection", + "children": [], + "url": "https://2023.antflix.net#700.11_(D)" + } + ], + "url": "https://2023.antflix.net#700.11" + }, + { + "displayTitle": "Part III Sources of Power", + "children": [], + "url": "https://2023.antflix.net#divider_93_III" + }, + { + "body": "Current supply shall be such that, in the event of failure of the normal supply to, or within, the building or group of buildings concerned, emergency lighting, emergency power, or both shall be available within the time required for the application but not to exceed 10 seconds. The supply system for emergency purposes, in addition to the normal services to the building and meeting the general requirements of this section, shall be one or more of the types of systems described in 700.12(C) through (H). Unit equipment in accordance with 700.12(H) shall satisfy the applicable requirements of this article. [700.12](https://2023.antflix.net#700.12)", + "displayTitle": "700.12 General Requirements", + "children": [ + { + "body": "In selecting an emergency source of power, consideration shall be given to the occupancy and the type of service to be rendered, whether of minimum duration, as for evacuation of a theater, or longer duration, as for supplying emergency power and lighting due to an indefinite period of current failure from trouble either inside or outside the building. [700.12_(A)](https://2023.antflix.net#700.12_(A))", + "displayTitle": "(A) Power Source Considerations", + "children": [], + "url": "https://2023.antflix.net#700.12_(A)" + }, + { + "body": "Equipment shall be designed and located so as to minimize the hazards that might cause complete failure due to flooding, fires, icing, and vandalism. Equipment for sources of power as described in 700.12(C) through (H) shall be installed either in spaces fully protected by approved automatic fire protection systems or in spaces with a 2-hour fire rating where located within the following:Assembly occupancies for more than 1000 personsBuildings above 23 m (75 ft) in heightEducational occupancies with more than 300 occupantsInformational Note No. 1: See NFPA 101-2021, Life Safety Code, Section 6.1, for information on occupancy classifications.Informational Note No. 2: See IEEE 3006.5-2014, Recommended Practice for the Use of Probability Methods for Conducting a Reliability Analysis of Industrial and Commercial Power Systems, for information regarding power system reliability. [700.12_(B)](https://2023.antflix.net#700.12_(B))", + "displayTitle": "(B) Equipment Design and Location", + "children": [], + "url": "https://2023.antflix.net#700.12_(B)" + }, + { + "body": "The emergency power source shall be of suitable rating and capacity to supply and maintain the total load for the duration determined by the system design. In no case shall the duration be less than 2 hours of system operation unless used for emergency illumination in 700.12(C)(4) or unit equipment in 700.12(H). Additionally, the power source shall comply with 700.12(C)(1) through (C)(5) as applicable. Informational Note: See NFPA 110-2022, Standard for Emergency and Standby Power Systems, for information on classification of emergency power supply systems (EPSS). [700.12_(C)](https://2023.antflix.net#700.12_(C))", + "displayTitle": "(C) Supply Duration", + "children": [ + { + "body": "An on-site fuel supply shall be provided, sufficient for not less than 2 hours operation of the system. [700.12_(C)_(1)](https://2023.antflix.net#700.12_(C)_(1))", + "displayTitle": "(1) On-Site Fuel Supply", + "children": [], + "url": "https://2023.antflix.net#700.12_(C)_(1)" + }, + { + "body": "Where power is needed for the operation of the fuel transfer pumps to deliver fuel to the source, these pumps shall be connected to the emergency power system. [700.12_(C)_(2)](https://2023.antflix.net#700.12_(C)_(2))", + "displayTitle": "(2) Fuel Transfer Pumps", + "children": [], + "url": "https://2023.antflix.net#700.12_(C)_(2)" + }, + { + "body": "Sources shall not be solely dependent on a public utility gas system for their fuel supply or municipal water supply for their cooling systems. Exception: Where approved by the authority having jurisdiction, the use of other than on-site fuels shall be permitted where there is a low probability of a simultaneous failure of both the off-site fuel delivery system and power from the outside electrical utility company. Where the public gas system is approved, the requirements of 700.12(C)(1) shall not apply. [700.12_(C)_(3)](https://2023.antflix.net#700.12_(C)_(3))", + "displayTitle": "(3) Public Gas System, Municipal Water Supply", + "children": [], + "url": "https://2023.antflix.net#700.12_(C)_(3)" + }, + { + "body": "Storage batteries and UPS used to supply emergency illumination shall be of suitable rating and capacity to supply and maintain the total load for a minimum period of 11/2 hours, without the voltage applied to the load falling below 871/2 percent of nominal voltage. Automotive-type batteries shall not be used. An automatic battery charging means shall be provided. [700.12_(C)_(4)](https://2023.antflix.net#700.12_(C)_(4))", + "displayTitle": "(4) Storage Batteries and UPS", + "children": [], + "url": "https://2023.antflix.net#700.12_(C)_(4)" + }, + { + "body": "Where dual fuel sources are used, means shall be provided for automatically transferring from one fuel source to another. [700.12_(C)_(5)](https://2023.antflix.net#700.12_(C)_(5))", + "displayTitle": "(5) Automatic Fuel Transfer", + "children": [], + "url": "https://2023.antflix.net#700.12_(C)_(5)" + } + ], + "url": "https://2023.antflix.net#700.12_(C)" + }, + { + "displayTitle": "(D) Generator Set", + "children": [ + { + "body": "For a generator set driven by a prime mover approved by the authority having jurisdiction and sized in accordance with 700.4, means shall be provided for automatically starting the prime mover on failure of the normal power source and for automatic transfer and operation of all required electrical circuits. A time-delay feature shall be provided to avoid retransfer in case of short-time reestablishment of the normal source. [700.12_(D)_(1)](https://2023.antflix.net#700.12_(D)_(1))", + "displayTitle": "(1) Prime Mover-Driven", + "children": [], + "url": "https://2023.antflix.net#700.12_(D)_(1)" + }, + { + "body": "Where a storage battery is used for control or signal power or as the means of starting the prime mover, it shall be suitable for the purpose and shall be equipped with an automatic charging means independent of the generator set. Where the battery charger is required for the operation of the generator set, it shall be connected to the emergency system. Where power is required for the operation of dampers used to ventilate the generator set, the dampers shall be connected to the emergency system. [700.12_(D)_(2)](https://2023.antflix.net#700.12_(D)_(2))", + "displayTitle": "(2) Battery Power and Dampers", + "children": [], + "url": "https://2023.antflix.net#700.12_(D)_(2)" + }, + { + "body": "Generator sets that require more than 10 seconds to develop power shall be permitted if an auxiliary power supply energizes the emergency system until the generator can pick up the load. [700.12_(D)_(3)](https://2023.antflix.net#700.12_(D)_(3))", + "displayTitle": "(3) Auxiliary Power Supply", + "children": [], + "url": "https://2023.antflix.net#700.12_(D)_(3)" + }, + { + "body": "Where an outdoor-housed generator set is equipped with a readily accessible disconnecting means in accordance with 445.18, and the disconnecting means is located within sight of the building or structure supplied, an additional disconnecting means shall not be required where ungrounded conductors serve or pass through the building or structure. Where the generator supply conductors terminate at a disconnecting means in or on a building or structure, the disconnecting means shall meet the requirements of 225.36. Exception: For installations under single management, where conditions of maintenance and supervision ensure that only qualified persons will monitor and service the installation and where documented safe switching procedures are established and maintained for disconnection, the generator set disconnecting means shall not be required to be located within sight of the building or structure served. [700.12_(D)_(4)](https://2023.antflix.net#700.12_(D)_(4))", + "displayTitle": "(4) Outdoor Generator Sets", + "children": [], + "url": "https://2023.antflix.net#700.12_(D)_(4)" + } + ], + "url": "https://2023.antflix.net#700.12_(D)" + }, + { + "body": "Stored energy power supply systems shall comply with 700.12(E)(1) and (E)(2). [700.12_(E)](https://2023.antflix.net#700.12_(E))", + "displayTitle": "(E) Stored-Energy Power Supply Systems (SEPSS)", + "children": [ + { + "body": "Systems shall consist of one or more of the following system types: Uninterruptible power supply (UPS)Informational Note: See UL 1778, Uninterruptible Power Systems, for further information.Fuel cell systemEnergy storage system (ESS)Storage batteryOther approved equivalent stored energy sources that comply with 700.12 [700.12_(E)_(1)](https://2023.antflix.net#700.12_(E)_(1))", + "displayTitle": "(1) Types", + "children": [], + "url": "https://2023.antflix.net#700.12_(E)_(1)" + }, + { + "body": "The systems in 700.12(E)(1) shall be installed with the fire protection, suppression, ventilation, and separation requirements specified in the manufacturer's instructions or equipment listing. Informational Note: See NFPA 853-2020, Standard for the Installation of Stationary Fuel Cell Power Systems, and NFPA 855-2020, Standard for the Installation of Stationary Energy Storage Systems, for additional information on fire protection installation requirements. [700.12_(E)_(2)](https://2023.antflix.net#700.12_(E)_(2))", + "displayTitle": "(2) Fire Protection, Suppression, Ventilation, and Separation", + "children": [], + "url": "https://2023.antflix.net#700.12_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#700.12_(E)" + }, + { + "body": "Where approved by the authority having jurisdiction as suitable for use as an emergency source of power, an additional service shall be permitted. This service shall be in accordance with the applicable provisions of Article 230 and the following additional requirements: Separate overhead service conductors, service drops, underground service conductors, or service laterals shall be installed.The service conductors for the separate service shall be installed sufficiently remote electrically and physically from any other service conductors to minimize the possibility of simultaneous interruption of supply. [700.12_(F)](https://2023.antflix.net#700.12_(F))", + "displayTitle": "(F) Separate Service", + "children": [], + "url": "https://2023.antflix.net#700.12_(F)" + }, + { + "body": "On-site sources, designated as emergency sources, shall be permitted to be connected to a microgrid system. The system shall isolate the emergency system from all nonemergency loads when the normal electric supply is interrupted or shall meet the requirements of 700.4(B). Interruption or partial or complete failure of the normal or nonemergency source(s) shall not impact the availability, capacity, and duration provided by the designated emergency sources. The designated stored-energy electrical emergency power source(s) of a microgrid system shall be permitted to remain interconnected to any available power production source during operation of the emergency source(s) where the lack of, or failure of, the interconnected power production source(s), or related controls, does not impact system operation. Interconnected power production sources, other than the designated stored emergency power source(s), shall not be required to meet the requirements of this article. [700.12_(G)](https://2023.antflix.net#700.12_(G))", + "displayTitle": "(G) Microgrid Systems", + "children": [], + "url": "https://2023.antflix.net#700.12_(G)" + }, + { + "displayTitle": "(H) Battery-Equipped Emergency Luminaires", + "children": [ + { + "body": "All battery-equipped emergency luminaires shall be listed. Informational Note No. 1: See ANSI/UL 924, Emergency Lighting and Power Equipment, for the requirements covering battery-equipped emergency luminaires and emergency battery packs. A listed emergency battery pack installed in a listed luminaire will provide similar functionality as a listed battery-equipped emergency luminaire. Informational Note No. 2: Unit equipment is a type of battery-equipped emergency luminaire. [700.12_(H)_(1)](https://2023.antflix.net#700.12_(H)_(1))", + "displayTitle": "(1) Listing", + "children": [], + "url": "https://2023.antflix.net#700.12_(H)_(1)" + }, + { + "body": "Battery-equipped emergency luminaires shall be installed in accordance with the following: Battery-equipped emergency luminaires shall be permanently fixed in place (i.e., not portable).Wiring to each luminaire shall be installed in accordance with the requirements of any of the wiring methods in Chapter 3 unless otherwise specified in Part II, IV, or V of this article. Flexible cord-and-plug connection shall be permitted for unit equipment, provided that the cord does not exceed 900 mm (3 ft) in length. Flexible cord, with or without a plug, shall also be permitted for battery-equipped emergency luminaires installed in accordance with 410.62(C)(1).The branch circuit feeding the battery-equipped emergency luminaire shall be one of the following:The same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches.The same or a different branch circuit as that serving the normal lighting in the area if that circuit is equipped with means to monitor the status of that area's normal lighting branch circuit ahead of any local switches.A separate branch circuit originating from the same panelboard as one or more normal lighting circuits. This separate branch circuit disconnecting means shall be provided with a lock-on feature.The branch circuit that feeds battery-equipped emergency luminaires shall be clearly identified at the distribution panel.Emergency luminaires that obtain power from a battery-equipped emergency luminaire shall be wired to the battery-equipped emergency luminaires as required in Part II, IV, or V of this article.Remote luminaires providing lighting for the exterior of an exit door shall be permitted to be supplied by the battery-equipped emergency luminaire serving the area immediately inside the exit door. [700.12_(H)_(2)](https://2023.antflix.net#700.12_(H)_(2))", + "displayTitle": "(2) Installation", + "children": [], + "url": "https://2023.antflix.net#700.12_(H)_(2)" + } + ], + "url": "https://2023.antflix.net#700.12_(H)" + } + ], + "url": "https://2023.antflix.net#700.12" + }, + { + "displayTitle": "Part IV Emergency System Circuits for Lighting and Power", + "children": [], + "url": "https://2023.antflix.net#divider_38_IV" + }, + { + "body": "No appliances and no lamps, other than those specified as required for emergency use, shall be supplied by emergency lighting circuits. [700.15](https://2023.antflix.net#700.15)", + "displayTitle": "700.15 Loads on Emergency Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#700.15" + }, + { + "displayTitle": "700.16 Emergency Illumination", + "children": [ + { + "body": "Emergency illumination shall include means of egress lighting, illuminated exit signs, and all other luminaires specified as necessary to provide required illumination. [700.16_(A)](https://2023.antflix.net#700.16_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#700.16_(A)" + }, + { + "body": "Emergency lighting systems shall be designed and installed so that the failure of any illumination source cannot leave in total darkness any space that requires emergency illumination. Emergency lighting control devices in the emergency lighting system shall be listed for use in emergency systems. Listed unit equipment in accordance with 700.12(H) shall be considered as meeting the provisions of this section. Informational Note: See 700.23 through 700.26 for applications of emergency system control devices. [700.16_(B)](https://2023.antflix.net#700.16_(B))", + "displayTitle": "(B) System Reliability", + "children": [], + "url": "https://2023.antflix.net#700.16_(B)" + }, + { + "body": "Where high-intensity discharge lighting such as high- and low-pressure sodium, mercury vapor, and metal halide is used as the sole source of normal illumination, the emergency lighting system shall be required to operate until normal illumination has been restored. [700.16_(C)](https://2023.antflix.net#700.16_(C))", + "displayTitle": "(C) Discharge Lighting", + "children": [], + "url": "https://2023.antflix.net#700.16_(C)" + }, + { + "body": "Where an emergency system is installed, emergency illumination shall be provided in the area of the disconnecting means required by 225.31 and 230.70, as applicable, where the disconnecting means are installed indoors. Exception: Alternative means that ensure that the emergency lighting illumination level is maintained shall be permitted. [700.16_(D)](https://2023.antflix.net#700.16_(D))", + "displayTitle": "(D) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#700.16_(D)" + } + ], + "url": "https://2023.antflix.net#700.16" + }, + { + "body": "Branch circuits that supply emergency lighting shall be installed to provide service from a source complying with 700.12 when the normal supply for lighting is interrupted. Such installations shall provide either of the following: An emergency lighting supply, independent of the normal lighting supply, with provisions for automatically transferring the emergency lights upon the event of failure of the normal lighting supply.Two or more branch circuits supplied from separate and complete systems with independent power sources. One of the two power sources and systems shall be part of the emergency system, and the other shall be permitted to be part of the normal power source and system. Each system shall provide sufficient power for emergency lighting purposes.Unless both systems are used for regular lighting purposes and both are kept lighted, means shall be provided for automatically energizing either system upon failure of the other. Either system or both systems shall be permitted to be a part of the general lighting of the protected occupancy if circuits supplying lights for emergency illumination are installed in accordance with other sections of this article. [700.17](https://2023.antflix.net#700.17)", + "displayTitle": "700.17 Branch Circuits for Emergency Lighting", + "children": [], + "url": "https://2023.antflix.net#700.17" + }, + { + "body": "For branch circuits that supply equipment classed as emergency, there shall be an emergency system supply source to which the load will be transferred automatically upon the failure of the normal supply. [700.18](https://2023.antflix.net#700.18)", + "displayTitle": "700.18 Circuits for Emergency Power", + "children": [], + "url": "https://2023.antflix.net#700.18" + }, + { + "body": "The branch circuit serving emergency lighting and power circuits shall not be part of a multiwire branch circuit. [700.19](https://2023.antflix.net#700.19)", + "displayTitle": "700.19 Multiwire Branch Circuits", + "children": [], + "url": "https://2023.antflix.net#700.19" + }, + { + "displayTitle": "Part V Control - Emergency Lighting Circuits", + "children": [], + "url": "https://2023.antflix.net#divider_27_V" + }, + { + "body": "The switch or switches installed in emergency lighting circuits shall be arranged so that only authorized persons have control of emergency lighting. Exception No. I: Where two or more single-throw switches are connected in parallel to control a single circuit, at least one of these switches shall be accessible only to authorized persons. Exception No. 2: Additional switches that act only to put emergency lights into operation but not disconnect them shall be permissible. Switches connected in series or 3- and 4-way switches shall not be used. [700.20](https://2023.antflix.net#700.20)", + "displayTitle": "700.20 Switch Requirements", + "children": [], + "url": "https://2023.antflix.net#700.20" + }, + { + "body": "All manual switches for controlling emergency circuits shall be in locations convenient to authorized persons responsible for their actuation. In facilities covered by Articles 518 and 520, a switch for controlling emergency lighting systems shall be located in the lobby or at a place conveniently accessible thereto. In no case shall a control switch for emergency lighting be placed in a motion-picture projection booth or on a stage or platform. Exception: Where multiple switches are provided, one such switch shall be permitted in such locations where arranged so that it can only energize the circuit but cannot de-energize the circuit. [700.21](https://2023.antflix.net#700.21)", + "displayTitle": "700.21 Switch Location", + "children": [], + "url": "https://2023.antflix.net#700.21" + }, + { + "body": "Those lights on the exterior of a building that are not required for illumination when there is sufficient daylight shall be permitted to be controlled by an automatic light-actuated device. [700.22](https://2023.antflix.net#700.22)", + "displayTitle": "700.22 Exterior Lights", + "children": [], + "url": "https://2023.antflix.net#700.22" + }, + { + "body": "A dimmer or relay system containing more than one dimmer or relay and listed for use in emergency systems shall be permitted to be used as a control device for energizing emergency lighting circuits. Upon failure of normal power, the dimmer or relay system shall be permitted to selectively energize only those branch circuits required to provide minimum emergency illumination using a control bypass function. Where the dimmer or relay system is fed by a normal/emergency power source from an upstream transfer switch, normal power sensing for this function shall be permitted to be from a normal-only power source upstream of the transfer switch. All branch circuits supplied by the dimmer or relay system cabinet shall comply with the wiring methods of Part II of Article 700. [700.23](https://2023.antflix.net#700.23)", + "displayTitle": "700.23 Dimmer and Relay Systems", + "children": [], + "url": "https://2023.antflix.net#700.23" + }, + { + "body": "Where emergency illumination is provided by one or more directly controlled emergency luminaires that, upon loss of normal power, respond to an external control input to establish the required emergency illumination level, such directly controlled emergency luminaries shall be listed for use in emergency systems. Luminaires that are energized to the required emergency illumination level by disconnection of their control input by a listed emergency lighting control device shall not be required to be listed for use in emergency systems. [700.24](https://2023.antflix.net#700.24)", + "displayTitle": "700.24 Directly Controlled Emergency Luminaires", + "children": [], + "url": "https://2023.antflix.net#700.24" + }, + { + "body": "Emergency lighting loads supplied by branch circuits rated at not greater than 20 amperes shall be permitted to be transferred from the normal branch circuit to an emergency branch circuit using a listed branch circuit emergency lighting transfer switch. The mechanically held requirement of 700.5(C) shall not apply to listed branch circuit emergency lighting transfer switches. [700.25](https://2023.antflix.net#700.25)", + "displayTitle": "700.25 Branch Circuit Emergency Lighting Transfer Switch", + "children": [], + "url": "https://2023.antflix.net#700.25" + }, + { + "body": "If an emergency lighting load is automatically energized upon loss of the normal supply, a listed automatic load control relay shall be permitted to energize the load. The load control relay shall not be used as transfer equipment. [700.26](https://2023.antflix.net#700.26)", + "displayTitle": "700.26 Automatic Load Control Relay", + "children": [], + "url": "https://2023.antflix.net#700.26" + }, + { + "body": "Devices that combine control signals with Class 2 emergency power on a single circuit shall be listed as emergency lighting control devices. Informational Note: An example of a device combining control signals with Class 2 emergency power sources is a Power over Ethernet (PoE) switch. [700.27](https://2023.antflix.net#700.27)", + "displayTitle": "700.27 Class 2 Powered Emergency Lighting Systems", + "children": [], + "url": "https://2023.antflix.net#700.27" + }, + { + "displayTitle": "Part VI Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#divider_20_VI" + }, + { + "body": "The branch-circuit overcurrent devices in emergency circuits shall be accessible to authorized persons only. [700.30](https://2023.antflix.net#700.30)", + "displayTitle": "700.30 Accessibility", + "children": [], + "url": "https://2023.antflix.net#700.30" + }, + { + "body": "The alternate source for emergency systems shall not be required to provide ground-fault protection of equipment with automatic disconnecting means. Ground-fault indication at the emergency source shall be provided in accordance with 700.6(D) if ground-fault protection of equipment with automatic disconnecting means is not provided. [700.31](https://2023.antflix.net#700.31)", + "displayTitle": "700.31 Ground-Fault Protection of Equipment", + "children": [], + "url": "https://2023.antflix.net#700.31" + }, + { + "displayTitle": "700.32 Selective Coordination", + "children": [ + { + "body": "Emergency system(s) overcurrent protective devices (OCPDs) shall be selectively coordinated with all supply-side and load-side OCPDs. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. [700.32_(A)](https://2023.antflix.net#700.32_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#700.32_(A)" + }, + { + "body": "Where emergency system(s) OCPDs are replaced, they shall be reevaluated to ensure selective coordination is maintained with all supply-side and load-side OCPDs. [700.32_(B)](https://2023.antflix.net#700.32_(B))", + "displayTitle": "(B) Replacements", + "children": [], + "url": "https://2023.antflix.net#700.32_(B)" + }, + { + "body": "If modifications, additions, or deletions to the emergency system(s) occur, selective coordination of the emergency system(s) OCPDs with all supply-side and load-side OCPDs shall be reevaluated.\nException: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device.\nInformational Note: See Informational Note Figure 700.32(C) for an example of how emergency system OCPDs selectively coordinate with all supply-side OCPDs.\nOCPD D selectively coordinates with OCPDs C, F, E, B, and A.\nOCPD C selectively coordinates with OCPDs F, E, B, and A.\nOCPD F selectively coordinates with OCPD E.\nOCPD B is not required to selectively coordinate with OCPD A because OCPD B is not an emergency system OCPD.\n\nInformational Note Figure 700.32(C) Emergency System Selective Coordination. [700.32_(C)](https://2023.antflix.net#700.32_(C))", + "displayTitle": "(C) Modifications", + "children": [], + "url": "https://2023.antflix.net#700.32_(C)" + } + ], + "url": "https://2023.antflix.net#700.32" + } + ], + "url": "https://2023.antflix.net#700" + }, + { + "displayTitle": "Article 701 Legally Required Standby Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_108_I" + }, + { + "body": "This article applies to the electrical safety of the installation, operation, and maintenance of legally required standby systems consisting of circuits and equipment intended to supply, distribute, and control electricity to required facilities for illumination or power, or both, when the normal electrical supply or system is interrupted. The systems covered by this article consist only of those that are permanently installed in their entirety, including the power source. Informational Note No. 1: See NFPA 99-2018, Health Care Facilities Code, for further information. Informational Note No. 2: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, for further information regarding performance of emergency and standby power systems. Informational Note No. 3: See ANSI/IEEE 446-1995, Recommended Practice for Emergency and Standby Power Systems for Industrial and Commercial Applications, for further information. Informational Note No. 4: Legally required standby systems are typically installed to serve loads, such as heating and refrigeration systems, communications systems, ventilation and smoke removal systems, sewage disposal systems, lighting systems, and industrial processes that, when stopped during any interruption of the normal electrical supply, could create hazards or hamper rescue or firefighting operations. Informational Note No. 5: Legally required standby systems are considered level one systems when failure to perform could result in loss of human life or serious injuries and level two systems when failure of legally required standby systems to perform is less critical to human life and safety when applying NFPA 110-2019, Standard for Emergency Standby Power Systems. [701.1](https://2023.antflix.net#701.1)", + "displayTitle": "701.1 Scope", + "children": [], + "url": "https://2023.antflix.net#701.1" + }, + { + "body": "Reconditioned transfer switches shall not be permitted. [701.2](https://2023.antflix.net#701.2)", + "displayTitle": "701.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#701.2" + }, + { + "displayTitle": "701.3 Commissioning and Maintenance", + "children": [ + { + "body": "The authority having jurisdiction shall conduct or witness the commissioning of the complete system upon installation. [701.3_(A)](https://2023.antflix.net#701.3_(A))", + "displayTitle": "(A) Commissioning Witness Test", + "children": [], + "url": "https://2023.antflix.net#701.3_(A)" + }, + { + "body": "Systems shall be tested periodically on a schedule and in a manner approved by the authority having jurisdiction to ensure the systems are maintained in proper operating condition. [701.3_(B)](https://2023.antflix.net#701.3_(B))", + "displayTitle": "(B) Tested Periodically", + "children": [], + "url": "https://2023.antflix.net#701.3_(B)" + }, + { + "body": "Legally required standby system equipment shall be maintained in accordance with manufacturer instructions and industry standards. [701.3_(C)](https://2023.antflix.net#701.3_(C))", + "displayTitle": "(C) Maintenance", + "children": [], + "url": "https://2023.antflix.net#701.3_(C)" + }, + { + "body": "A written record shall be kept on such tests and maintenance. [701.3_(D)](https://2023.antflix.net#701.3_(D))", + "displayTitle": "(D) Written Record", + "children": [], + "url": "https://2023.antflix.net#701.3_(D)" + }, + { + "body": "Means for testing legally required standby systems under load shall be provided. Informational Note: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, for information on testing and maintenance of emergency power supply systems (EPSSs). [701.3_(E)](https://2023.antflix.net#701.3_(E))", + "displayTitle": "(E) Testing Under Load", + "children": [], + "url": "https://2023.antflix.net#701.3_(E)" + } + ], + "url": "https://2023.antflix.net#701.3" + }, + { + "displayTitle": "701.4 Capacity and Rating", + "children": [ + { + "body": "Legally required standby system equipment shall be suitable for the available fault current at its terminals. [701.4_(A)](https://2023.antflix.net#701.4_(A))", + "displayTitle": "(A) Rating", + "children": [], + "url": "https://2023.antflix.net#701.4_(A)" + }, + { + "body": "A legally required standby system shall have adequate capacity in accordance with Parts I through IV of Article 220 or by another approved method. The system capacity shall be sufficient for the rapid load changes and transient power and energy requirements associated with any expected loads. [701.4_(B)](https://2023.antflix.net#701.4_(B))", + "displayTitle": "(B) Capacity", + "children": [], + "url": "https://2023.antflix.net#701.4_(B)" + }, + { + "body": "The alternate power source shall be permitted to supply legally required standby and optional standby system loads where the alternate source has adequate capacity or where load management (that includes automatic selective load pickup and load shedding) is provided that will ensure adequate power to the legally required standby circuits. [701.4_(C)](https://2023.antflix.net#701.4_(C))", + "displayTitle": "(C) Load Management", + "children": [], + "url": "https://2023.antflix.net#701.4_(C)" + }, + { + "body": "Parallel operation shall comply with Part I or Part II of Article 705 where the legally required source capacity required to supply the legally required load is maintained at all times. Parallel operation of the legally required source(s) shall consist of the sources specified in 701.4(D)(1) and (D)(2). [701.4_(D)](https://2023.antflix.net#701.4_(D))", + "displayTitle": "(D) Parallel Operation", + "children": [ + { + "body": "The alternate power source shall be permitted to operate in parallel with the normal source in compliance with Part I or Part II of Article 705 where the capacity required to supply the legally required standby load is maintained at all times. Any operating condition that results in less than the required source capacity shall initiate a legally required standby source malfunction signal in 701.6(A). Parallel operation shall be permitted for satisfying the test requirements of 701.3(B), provided all other conditions of 701.3 are met. Informational Note: Peak load shaving is one application for parallel source operation. [701.4_(D)_(1)](https://2023.antflix.net#701.4_(D)_(1))", + "displayTitle": "(1) Normal Source", + "children": [], + "url": "https://2023.antflix.net#701.4_(D)_(1)" + }, + { + "body": "Legally required standby sources shall be permitted to operate in parallel where the necessary equipment to establish and maintain a synchronous condition is provided. [701.4_(D)_(2)](https://2023.antflix.net#701.4_(D)_(2))", + "displayTitle": "(2) Alternate Source", + "children": [], + "url": "https://2023.antflix.net#701.4_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#701.4_(D)" + } + ], + "url": "https://2023.antflix.net#701.4" + }, + { + "displayTitle": "701.5 Transfer Equipment", + "children": [ + { + "body": "Transfer equipment shall be automatic, listed, and marked for emergency system or legally required standby use. Transfer equipment shall be designed and installed to prevent the inadvertent interconnection of normal and alternate sources of supply in any operation of the transfer equipment. Transfer equipment and electric power production systems installed to permit operation in parallel with the normal source shall meet the requirements of Article 705. Meter-mounted transfer switches shall not be permitted for legally required system use. [701.5_(A)](https://2023.antflix.net#701.5_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#701.5_(A)" + }, + { + "body": "Means to bypass and isolate the transfer switch equipment shall be permitted. Where bypass isolation switches are used, inadvertent parallel operation shall be avoided. [701.5_(B)](https://2023.antflix.net#701.5_(B))", + "displayTitle": "(B) Bypass Isolation Switches", + "children": [], + "url": "https://2023.antflix.net#701.5_(B)" + }, + { + "body": "Automatic transfer switches shall be electrically operated and mechanically held. [701.5_(C)](https://2023.antflix.net#701.5_(C))", + "displayTitle": "(C) Automatic Transfer Switches", + "children": [], + "url": "https://2023.antflix.net#701.5_(C)" + }, + { + "body": "The short-circuit current rating of the transfer equipment, based on the specific overcurrent protective device type and settings protecting the transfer equipment, shall be field marked on the exterior of the transfer equipment. [701.5_(D)](https://2023.antflix.net#701.5_(D))", + "displayTitle": "(D) Documentation", + "children": [], + "url": "https://2023.antflix.net#701.5_(D)" + } + ], + "url": "https://2023.antflix.net#701.5" + }, + { + "body": "Audible and visual signal devices shall be provided, where practicable, for the purposes described in 701.6(A), (B), (C), and (D). [701.6](https://2023.antflix.net#701.6)", + "displayTitle": "701.6 Signals", + "children": [ + { + "body": "Malfunction signals indicate a malfunction of the standby source. [701.6_(A)](https://2023.antflix.net#701.6_(A))", + "displayTitle": "(A) Malfunction", + "children": [], + "url": "https://2023.antflix.net#701.6_(A)" + }, + { + "body": "Load carrying signals indicate that the standby source is carrying load. [701.6_(B)](https://2023.antflix.net#701.6_(B))", + "displayTitle": "(B) Carrying Load", + "children": [], + "url": "https://2023.antflix.net#701.6_(B)" + }, + { + "body": "Battery charging malfunction signals indicate charging malfunction on a battery required for source readiness, including the prime mover starting battery. Informational Note: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, for signals for generator sets. [701.6_(C)](https://2023.antflix.net#701.6_(C))", + "displayTitle": "(C) Battery Charging Malfunction", + "children": [], + "url": "https://2023.antflix.net#701.6_(C)" + }, + { + "body": "Ground-fault signals indicate a ground fault in solidly grounded wye, legally required standby systems of more than 150 volts to ground and circuit-protective devices rated 1000 amperes or more. The sensor for the ground-fault signal devices shall be located at, or ahead of, the main system disconnecting means for the legally required standby source, and the maximum setting of the signal devices shall be for a ground-fault current of 1200 amperes. Instructions on the course of action to be taken in the event of an indicated ground fault shall be located at or near the sensor location. For systems with multiple emergency sources connected to a paralleling bus, the ground-fault sensor shall be permitted at an alternate location. Informational Note: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, for signals for generator sets. [701.6_(D)](https://2023.antflix.net#701.6_(D))", + "displayTitle": "(D) Ground Fault", + "children": [], + "url": "https://2023.antflix.net#701.6_(D)" + } + ], + "url": "https://2023.antflix.net#701.6" + }, + { + "displayTitle": "701.7 Signs", + "children": [ + { + "body": "A sign shall be placed at the service entrance indicating type and location of each on-site legally required standby power source. Exception: A sign shall not be required for individual unit equipment as specified in 701.12(1). [701.7_(A)](https://2023.antflix.net#701.7_(A))", + "displayTitle": "(A) Mandated Standby", + "children": [], + "url": "https://2023.antflix.net#701.7_(A)" + }, + { + "body": "Where removal of a grounding or bonding connection in normal power source equipment interrupts the grounding electrode conductor connection to the alternate power source(s) grounded conductor, a warning sign shall be installed at the normal power source equipment stating: WARNINGSHOCK HAZARD EXISTS IF GROUNDING ELECTRODECONDUCTOR OR BONDING JUMPER CONNECTION INTHIS EQUIPMENT IS REMOVED WHILE ALTERNATESOURCE(S) IS ENERGIZED. The warning sign(s) or label(s) shall comply with 110.21(B). [701.7_(B)](https://2023.antflix.net#701.7_(B))", + "displayTitle": "(B) Grounding", + "children": [], + "url": "https://2023.antflix.net#701.7_(B)" + } + ], + "url": "https://2023.antflix.net#701.7" + }, + { + "displayTitle": "Part II Circuit Wiring", + "children": [], + "url": "https://2023.antflix.net#divider_108_II" + }, + { + "displayTitle": "701.10 Wiring Legally Required Standby Systems", + "children": [ + { + "body": "The legally required standby system wiring shall be permitted to occupy the same raceways, cables, boxes, and cabinets with other general wiring. [701.10_(A)](https://2023.antflix.net#701.10_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#701.10_(A)" + }, + { + "body": "Wiring from a legally required source to supply legally required and other (nonlegally required) loads shall be in accordance with the following: The common bus of switchgear, sections of a switchboard, or individual enclosures shall be either of the following:Supplied by single or multiple feeders without overcurrent protection at the sourceSupplied by single or multiple feeders with overcurrent protection, provided that the overcurrent protection that is common to a legally required system and any nonlegally required system(s) is selectively coordinated with the next downstream overcurrent protective device in the nonlegally required system(s)\nInformational Note: See Informational Note Figure 701.10(B)(1) and Informational Note Figure 701.10(B)(2) for further information.\n\n\nInformational Note: See Informational Note Figure 701.10(B)(1) Single or Multiple Feeders Without Overcurrent Protection.Informational Note Figure 701.10(B)(2) Single or Multiple Feeders with Overcurrent Protection. [701.10_(B)](https://2023.antflix.net#701.10_(B))", + "displayTitle": "(B) Wiring", + "children": [], + "url": "https://2023.antflix.net#701.10_(B)" + } + ], + "url": "https://2023.antflix.net#701.10" + }, + { + "displayTitle": "Part III Sources of Power", + "children": [], + "url": "https://2023.antflix.net#divider_94_III" + }, + { + "body": "Current supply shall be such that, in the event of failure of the normal supply to, or within, the building or group of buildings concerned, legally required standby power will be available within the time required for the application but not to exceed 60 seconds. The supply system for legally required standby purposes, in addition to the normal services to the building, shall be permitted to comprise one or more of the types of systems described in 701.12(A) through (I). Unit equipment in accordance with 701.12(1) shall satisfy the applicable requirements of this article. [701.12](https://2023.antflix.net#701.12)", + "displayTitle": "701.12 General Requirements", + "children": [ + { + "body": "In selecting a legally required standby source of power, consideration shall be given to the type of service to be rendered, whether of short-time duration or long duration. [701.12_(A)](https://2023.antflix.net#701.12_(A))", + "displayTitle": "(A) Power Source Considerations", + "children": [], + "url": "https://2023.antflix.net#701.12_(A)" + }, + { + "body": "Consideration shall be given to the location or design, or both, of all equipment to minimize the hazards that might cause complete failure due to floods, fires, icing, and vandalism. Informational Note: See ANSI/IEEE 493-2007, Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems, for further information. [701.12_(B)](https://2023.antflix.net#701.12_(B))", + "displayTitle": "(B) Equipment Design and Location", + "children": [], + "url": "https://2023.antflix.net#701.12_(B)" + }, + { + "body": "The alternate power source shall be of suitable rating and capacity to supply and maintain the total load for the duration determined by the system design. In no case shall the duration be less than 2 hours of system operation. Additionally, the power source shall comply with 701.12(C)(1) through (C)(5) as applicable. Informational Note: See NFPA 110-2022, Standard for Emergency and Standby Power Systems, for information on classification of emergency power supply systems (EPSS). [701.12_(C)](https://2023.antflix.net#701.12_(C))", + "displayTitle": "(C) Supply Duration", + "children": [ + { + "body": "An on-site fuel supply shall be provided, sufficient for not less than 2 hours operation of the system. [701.12_(C)_(1)](https://2023.antflix.net#701.12_(C)_(1))", + "displayTitle": "(1) On-Site Fuel Supply", + "children": [], + "url": "https://2023.antflix.net#701.12_(C)_(1)" + }, + { + "body": "Where power is needed for the operation of the fuel transfer pumps to deliver fuel to the source, these pumps shall be connected to the legally required standby power system. [701.12_(C)_(2)](https://2023.antflix.net#701.12_(C)_(2))", + "displayTitle": "(2) Fuel Transfer Pumps", + "children": [], + "url": "https://2023.antflix.net#701.12_(C)_(2)" + }, + { + "body": "Sources shall not be solely dependent on a public utility gas system for their fuel supply or on a municipal water supply for their cooling systems. Exception: Where approved by the authority having jurisdiction, the use of other than on-site fuels shall be permitted where there is a low probability of a simultaneous failure of both the off-site fuel delivery system and power from the outside electrical utility company. Where a public gas system is approved, the requirements of 701.12(C)(1) shall not apply. [701.12_(C)_(3)](https://2023.antflix.net#701.12_(C)_(3))", + "displayTitle": "(3) Public Gas System, Municipal Water Supply", + "children": [], + "url": "https://2023.antflix.net#701.12_(C)_(3)" + }, + { + "body": "Storage batteries and UPS used to supply standby illumination shall be of suitable rating and capacity to supply and maintain the total load for a minimum period of 11/2 hours, without the voltage applied to the load falling below 871/2 percent of nominal voltage. Automotive-type batteries shall not be used. An automatic battery charging means shall be provided. [701.12_(C)_(4)](https://2023.antflix.net#701.12_(C)_(4))", + "displayTitle": "(4) Storage Batteries and UPS", + "children": [], + "url": "https://2023.antflix.net#701.12_(C)_(4)" + }, + { + "body": "Where dual fuel sources are used, means shall be provided for automatically transferring from one fuel source to another. [701.12_(C)_(5)](https://2023.antflix.net#701.12_(C)_(5))", + "displayTitle": "(5) Automatic Fuel Source Transfer", + "children": [], + "url": "https://2023.antflix.net#701.12_(C)_(5)" + } + ], + "url": "https://2023.antflix.net#701.12_(C)" + }, + { + "displayTitle": "(D) Generator Set", + "children": [ + { + "body": "For a generator set driven by a prime mover approved by the authority having jurisdiction and sized in accordance with 701.4, means shall be provided for automatically starting the prime mover upon failure of the normal power source and for automatic transfer and operation of all required electrical circuits. A time-delay feature permitting a 15-minute setting shall be provided to avoid retransfer in case of short-time reestablishment of the normal source. [701.12_(D)_(1)](https://2023.antflix.net#701.12_(D)_(1))", + "displayTitle": "(1) Prime Mover-Driven", + "children": [], + "url": "https://2023.antflix.net#701.12_(D)_(1)" + }, + { + "body": "Where a storage battery is used for control or signal power or as the means of starting the prime mover, it shall be suitable for the purpose and shall be equipped with an automatic charging means independent of the generator set. [701.12_(D)_(2)](https://2023.antflix.net#701.12_(D)_(2))", + "displayTitle": "(2) Battery Power", + "children": [], + "url": "https://2023.antflix.net#701.12_(D)_(2)" + }, + { + "body": "If an outdoor-housed generator set is equipped with a readily accessible disconnecting means in accordance with 445.18, and the disconnecting means is located within sight of the building or structure supplied, an additional disconnecting means shall not be required where ungrounded conductors serve or pass through the building or structure. Where the generator supply conductors terminate at a disconnecting means in or on a building or structure, the disconnecting means shall meet the requirements of 225.36. [701.12_(D)_(3)](https://2023.antflix.net#701.12_(D)_(3))", + "displayTitle": "(3) Outdoor Generator Sets", + "children": [], + "url": "https://2023.antflix.net#701.12_(D)_(3)" + } + ], + "url": "https://2023.antflix.net#701.12_(D)" + }, + { + "body": "Stored energy power supply systems shall comply with 701.12(E)(1) and (E)(2). [701.12_(E)](https://2023.antflix.net#701.12_(E))", + "displayTitle": "(E) Stored-Energy Power Supply Systems (SEPSS)", + "children": [ + { + "body": "Systems shall consist of one or more of the following system types: Uninterruptible power supply (UPS)Informational Note: See UL 1778, Uninterruptable Power Systems, and UL 924, Emergency Lighting and Power Equipment, for further information.Fuel cell systemEnergy storage system (ESS)Storage batteryOther approved equivalent stored energy sources that comply with 701.12 [701.12_(E)_(1)](https://2023.antflix.net#701.12_(E)_(1))", + "displayTitle": "(1) Types", + "children": [], + "url": "https://2023.antflix.net#701.12_(E)_(1)" + }, + { + "body": "The systems in 701.12(E)(1) shall be installed with the fire protection, suppression, ventilation, and separation requirements specified in the manufacturer's instructions or equipment listing. Informational Note: See NFPA 853-2020, Standard for the Installation of Stationary Fuel Cell Power Systems, and NFPA 855-2020, Standard for the Installation of Stationary Energy Storage Systems, for additional information on fire protection installation requirements. [701.12_(E)_(2)](https://2023.antflix.net#701.12_(E)_(2))", + "displayTitle": "(2) Fire Protection, Suppression, Ventilation, and Separation", + "children": [], + "url": "https://2023.antflix.net#701.12_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#701.12_(E)" + }, + { + "body": "Where approved, by the authority having jurisdiction as suitable for use as a legally required source of power, an additional service shall be permitted. This service shall be in accordance with Article 230 and the following additional requirements: Separate overhead service conductors, service drops, underground service conductors, or service laterals shall be installed.The service conductors for the separate service shall be installed sufficiently remote electrically and physically from any other service conductors to minimize the possibility of simultaneous interruption of supply. [701.12_(F)](https://2023.antflix.net#701.12_(F))", + "displayTitle": "(F) Separate Service", + "children": [], + "url": "https://2023.antflix.net#701.12_(F)" + }, + { + "body": "Where approved by the authority having jurisdiction, connections located ahead of and not within the same cabinet, enclosure, vertical switchgear section, or vertical switchboard section as the service disconnecting means shall be permitted. The legally required standby service shall be sufficiently separated from the normal main service disconnecting means to minimize simultaneous interruption of supply through an occurrence within the building or groups of buildings served. Informational Note: See 230.82 for equipment permitted on the supply side of a service disconnecting means. [701.12_(G)](https://2023.antflix.net#701.12_(G))", + "displayTitle": "(G) Connection Ahead of Service Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#701.12_(G)" + }, + { + "body": "On-site sources, designated as legally required standby sources, shall be permitted to be connected to a microgrid system. The system shall isolate the legally required standby system from all nonlegally required loads when the normal electric supply is interrupted or shall meet the requirements of 701.4(C). Interruption or partial or complete failure of the normal source(s) shall not impact the availability, capacity, and duration provided by the designated legally required standby sources. The designated stored-energy legally required standby power source(s) of a microgrid system shall be permitted to remain interconnected to any available power production source during operation of the legally required standby source(s) where the lack of, or failure of, the interconnected power production source(s), or related controls, does not impact system operation. Interconnected power production sources, other than the designated SEPSS, shall not be required to meet the requirements of this article. [701.12_(H)](https://2023.antflix.net#701.12_(H))", + "displayTitle": "(H) Microgrid Systems", + "children": [], + "url": "https://2023.antflix.net#701.12_(H)" + }, + { + "body": "Battery-equipped emergency luminaires used for legally required standby systems shall comply with 700.12(H). [701.12_(I)](https://2023.antflix.net#701.12_(I))", + "displayTitle": "(I) Battery-Equipped Emergency Luminaires, Used for Legally Required Standby Systems", + "children": [], + "url": "https://2023.antflix.net#701.12_(I)" + } + ], + "url": "https://2023.antflix.net#701.12" + }, + { + "displayTitle": "Part IV Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#divider_39_IV" + }, + { + "body": "The branch-circuit overcurrent devices in legally required standby circuits shall be accessible to authorized persons only. [701.30](https://2023.antflix.net#701.30)", + "displayTitle": "701.30 Accessibility", + "children": [], + "url": "https://2023.antflix.net#701.30" + }, + { + "body": "The alternate source for legally required standby systems shall not be required to provide ground-fault protection of equipment with automatic disconnecting means. Ground-fault indication at the legally required standby source shall be provided in accordance with 701.6(D) if ground-fault protection of equipment with automatic disconnecting means is not provided. [701.31](https://2023.antflix.net#701.31)", + "displayTitle": "701.31 Ground-Fault Protection of Equipment", + "children": [], + "url": "https://2023.antflix.net#701.31" + }, + { + "displayTitle": "701.32 Selective Coordination", + "children": [ + { + "body": "Legally required standby system(s) overcurrent protective devices (OCPDs shall be selectively coordinated with all supply-side and load-side OCPDs. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. [701.32_(A)](https://2023.antflix.net#701.32_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#701.32_(A)" + }, + { + "body": "Where legally required standby OCPDs are replaced, they shall be reevaluated to ensure selective coordination is maintained with all supply-side and load-side OCPDs. [701.32_(B)](https://2023.antflix.net#701.32_(B))", + "displayTitle": "(B) Replacements", + "children": [], + "url": "https://2023.antflix.net#701.32_(B)" + }, + { + "body": "If modifications, additions, or deletions to the legally required standby system(s) occur, selective coordination of the legally required system(s) OCPDs with all supply-side and load-side OCPDs shall be reevaluated. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. Informational Note: See Informational Note Figure 701.32(C) for an example of how legally required standby system OCPDs selectively coordinate with all supply-side OCPDs. OCPD D selectively coordinates with OCPDs C, F, E, B, and A. OCPD C selectively coordinates with OCPDs F, E, B, and A. OCPD F selectively coordinates with OCPD E. OCPD B is not required to selectively coordinate with OCPD A because OCPD B is not a legally required standby system OCPD. Informational Note Figure 701.32(C) Legally Required Standby System Selective Coordination. [701.32_(C)](https://2023.antflix.net#701.32_(C))", + "displayTitle": "(C) Modifications", + "children": [], + "url": "https://2023.antflix.net#701.32_(C)" + } + ], + "url": "https://2023.antflix.net#701.32" + } + ], + "url": "https://2023.antflix.net#701" + }, + { + "displayTitle": "Article 702 Optional Standby Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_109_I" + }, + { + "body": "This article applies to the installation and operation of optional standby systems. The systems covered by this article consist of those that are permanently installed in their entirety, including prime movers, and those that are arranged for a connection to a premises wiring system from a portable alternate power supply. Informational Note: Optional standby systems are typically installed to provide an alternate source of electric power for such facilities as industrial and commercial buildings, farms, and residences and to serve loads such as heating and refrigeration systems, data processing and communications systems, and industrial processes that, when stopped during any power outage, could cause discomfort, serious interruption of the process, damage to the product or process, or the like. [702.1](https://2023.antflix.net#702.1)", + "displayTitle": "702.1 Scope", + "children": [], + "url": "https://2023.antflix.net#702.1" + }, + { + "body": "Reconditioned transfer switches shall not be permitted. [702.2](https://2023.antflix.net#702.2)", + "displayTitle": "702.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#702.2" + }, + { + "displayTitle": "702.4 Capacity and Rating", + "children": [ + { + "displayTitle": "(A) System Capacity", + "children": [ + { + "body": "If the connection of load is manual or nonautomatic, an optional standby system shall have adequate capacity and rating for the supply of all equipment intended to be operated at one time. The user of the optional standby system shall be permitted to select the load connected to the system. Informational Note: Manual and nonautomatic transfer equipment require human intervention. [702.4_(A)_(1)](https://2023.antflix.net#702.4_(A)_(1))", + "displayTitle": "(1) Manual and Nonautomatic Load Connection", + "children": [], + "url": "https://2023.antflix.net#702.4_(A)_(1)" + }, + { + "body": "If the connection of load is automatic, an optional standby system shall comply with 702.4(A)(2)(a) or (A)(2)(b) in accordance with Parts I through IV of Article 220 or by another approved method.\n\nFull Load. The standby source shall be capable of supplying the full load that is automatically connected.\nEnergy Management System (EMS). Where a system is employed in accordance with 750.30 that will automatically manage the connected load, the standby source shall have a capacity sufficient to supply the maximum load that will be connected by the EMS.\n [702.4_(A)_(2)](https://2023.antflix.net#702.4_(A)_(2))", + "displayTitle": "(2) Automatic Load Connection", + "children": [], + "url": "https://2023.antflix.net#702.4_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#702.4_(A)" + } + ], + "url": "https://2023.antflix.net#702.4" + }, + { + "displayTitle": "702.5 Interconnection or Transfer Equipment", + "children": [ + { + "body": "Interconnection or transfer equipment shall be required for all standby systems subject to the requirements of this article. Equipment shall be suitable for the intended use and shall be listed, designed, and installed so as to prevent the inadvertent interconnection of all sources of supply in any operation of the equipment. Exception: Temporary connection of a portable generator without transfer equipment shall be permitted where conditions of maintenance and supervision ensure that only qualified persons service the installation and where the normal supply is physically isolated by a lockable disconnecting means or by disconnection of the normal supply conductors. [702.5_(A)](https://2023.antflix.net#702.5_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#702.5_(A)" + }, + { + "body": "Transfer switches installed between the utility meter and the meter enclosure shall be listed meter-mounted transfer switches and shall be approved. Informational Note No. 1: See UL 1008M, Transfer Stritch Equipment, Meter Mounted, for more information. Informational Note No. 2: Manual and nonautomatic transfer equipment use human intervention. [702.5_(B)](https://2023.antflix.net#702.5_(B))", + "displayTitle": "(B) Meter-Mounted Transfer Switches", + "children": [], + "url": "https://2023.antflix.net#702.5_(B)" + }, + { + "body": "In other than dwelling units, the short-circuit current rating of the transfer equipment, based on the specific overcurrent protective device type and settings protecting the transfer equipment, shall be field marked on the exterior of the transfer equipment. [702.5_(C)](https://2023.antflix.net#702.5_(C))", + "displayTitle": "(C) Documentation", + "children": [], + "url": "https://2023.antflix.net#702.5_(C)" + }, + { + "body": "Systems installed to permit operation in parallel with the normal source shall also meet Part I or Part II of Article 705. [702.5_(D)](https://2023.antflix.net#702.5_(D))", + "displayTitle": "(D) Parallel Installation", + "children": [], + "url": "https://2023.antflix.net#702.5_(D)" + } + ], + "url": "https://2023.antflix.net#702.5" + }, + { + "body": "Audible and visual signal devices shall be provided, where practicable, for the following purposes specified in 702.6(A) and (B). [702.6](https://2023.antflix.net#702.6)", + "displayTitle": "702.6 Signals", + "children": [ + { + "body": "To indicate malfunction of the optional standby source. [702.6_(A)](https://2023.antflix.net#702.6_(A))", + "displayTitle": "(A) Malfunction", + "children": [], + "url": "https://2023.antflix.net#702.6_(A)" + }, + { + "body": "To indicate that the optional standby source is carrying load. Exception: Signals shall not be required for portable standby power sources. [702.6_(B)](https://2023.antflix.net#702.6_(B))", + "displayTitle": "(B) Carrying Load", + "children": [], + "url": "https://2023.antflix.net#702.6_(B)" + } + ], + "url": "https://2023.antflix.net#702.6" + }, + { + "displayTitle": "702.7 Signs", + "children": [ + { + "body": "A sign shall be placed at the service equipment for other than one- and two-family dwellings that indicates the type and location of each on-site optional standby power source. For one- and two-family dwelling units, a sign shall be placed at the disconnecting means required in 230.85 that indicates the location of each permanently installed on-site optional standby power source disconnect or means to shut down the prime mover as required in 445.19(C). [702.7_(A)](https://2023.antflix.net#702.7_(A))", + "displayTitle": "(A) Standby", + "children": [], + "url": "https://2023.antflix.net#702.7_(A)" + }, + { + "body": "Where removal of a grounding or bonding connection in normal power source equipment interrupts the grounding electrode conductor connection to the alternate power source(s) grounded conductor, a warning sign shall be installed at the normal power source equipment stating: WARNING: SHOCK HAZARD EXISTS IF GROUNDING ELECTRODECONDUCTOR OR BONDING JUMPER CONNECTION INTHIS EQUIPMENT IS REMOVED WHILE ALTERNATESOURCE(S) IS ENERGIZED. The warning sign(s) or label(s) shall comply with 110.21(B). [702.7_(B)](https://2023.antflix.net#702.7_(B))", + "displayTitle": "(B) Grounding", + "children": [], + "url": "https://2023.antflix.net#702.7_(B)" + }, + { + "body": "Where a power inlet is used for a temporary connection to a portable generator, a warning sign shall be placed near the inlet to indicate the type of derived system that the system is capable of based on the wiring of the transfer equipment. The sign shall display one of the following warnings: WARNING: FOR CONNECTION OF A SEPARATELY DERIVED(BONDED NEUTRAL) SYSTEM ONLYorWARNING:FOR CONNECTION OF A NONSEPARATELY DERIVED(FLOATING NEUTRAL) SYSTEM ONLY [702.7_(C)](https://2023.antflix.net#702.7_(C))", + "displayTitle": "(C) Power Inlet", + "children": [], + "url": "https://2023.antflix.net#702.7_(C)" + } + ], + "url": "https://2023.antflix.net#702.7" + }, + { + "displayTitle": "Part II Wiring", + "children": [], + "url": "https://2023.antflix.net#divider_109_II" + }, + { + "body": "The optional standby system wiring shall be permitted to occupy the same raceways, cables, boxes, and cabinets with other general wiring. [702.10](https://2023.antflix.net#702.10)", + "displayTitle": "702.10 Wiring Optional Standby Systems", + "children": [], + "url": "https://2023.antflix.net#702.10" + }, + { + "displayTitle": "702.11 Portable Generator Grounding", + "children": [ + { + "body": "Where a portable optional standby source is used as a separately derived system, it shall be grounded to a grounding electrode in accordance with 250.30. [702.11_(A)](https://2023.antflix.net#702.11_(A))", + "displayTitle": "(A) Separately Derived System", + "children": [], + "url": "https://2023.antflix.net#702.11_(A)" + }, + { + "body": "Where a portable optional standby source is used as a nonseparately derived system, the equipment grounding conductor shall be bonded to the system grounding electrode. [702.11_(B)](https://2023.antflix.net#702.11_(B))", + "displayTitle": "(B) Nonseparately Derived System", + "children": [], + "url": "https://2023.antflix.net#702.11_(B)" + } + ], + "url": "https://2023.antflix.net#702.11" + }, + { + "displayTitle": "702.12 Outdoor Generator Sets", + "children": [ + { + "body": "Where an outdoor housed generator set is equipped with a readily accessible disconnecting means in accordance with 445.18, and the disconnecting means is located within sight of the building or structure supplied, an additional disconnecting means shall not be required where ungrounded conductors serve or pass through the building or structure. Where the generator supply conductors terminate at a disconnecting means in or on a building or structure, the disconnecting means shall meet the requirements of 225.36. [702.12_(A)](https://2023.antflix.net#702.12_(A))", + "displayTitle": "(A) Portable Generators Greater Than 15 kW and Permanently Installed Generators", + "children": [], + "url": "https://2023.antflix.net#702.12_(A)" + }, + { + "body": "Where a portable generator, rated 15 kW or less, is installed using a flanged inlet or other cord-and-plug-type connection, a disconnecting means shall not be required where ungrounded conductors serve or pass through a building or structure. The flanged inlet or other cord-and-plug-type connection shall be located outside of a building or structure. [702.12_(B)](https://2023.antflix.net#702.12_(B))", + "displayTitle": "(B) Portable Generators 15 kW or Less", + "children": [], + "url": "https://2023.antflix.net#702.12_(B)" + }, + { + "body": "Equipment containing power inlets for the connection of a generator source shall be listed for the intended use. Systems with power inlets not rated as a disconnecting means shall be equipped with an interlocked disconnecting means. Exception: Supervised industrial installations where permanent space is identified for the portable generator located within line of sight of the power inlets shall not be required to have interlocked disconnecting means nor inlets rated as disconnects. [702.12_(C)](https://2023.antflix.net#702.12_(C))", + "displayTitle": "(C) Power Inlets Rated at 100 Amperes or Greater, for Portable Generators", + "children": [], + "url": "https://2023.antflix.net#702.12_(C)" + } + ], + "url": "https://2023.antflix.net#702.12" + } + ], + "url": "https://2023.antflix.net#702" + }, + { + "displayTitle": "Article 705 Interconnected Electric Power Production Sources", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_110_I" + }, + { + "body": "This article covers installation of one or more electric power production sources operating in parallel with a primary source(s) of electricity. Informational Note No. 1: Examples of the types of primary sources include a utility supply or an on-site electric power source(s). Informational Note No. 2: See Informational Note Figure 705.1. Notes:These diagrams are intended to be a means of identification for power source components, circuits, and connections.The power source disconnect in these diagrams separates the power source from other systems.Equipment disconnecting means not shown.System grounding and equipment grounding are not shown.Custom designs occur in each configuration, and some components are optional.Informational Note Figure 705.1 Identification of Power Source Components in Common Configurations [705.1](https://2023.antflix.net#705.1)", + "displayTitle": "705.1 Scope", + "children": [], + "url": "https://2023.antflix.net#705.1" + }, + { + "displayTitle": "705.5 Parallel Operation", + "children": [ + { + "body": "Power production sources operating in parallel with a primary source of electricity or other power production sources shall have compatible voltage, wave shape, and frequency ratings. [705.5_(A)](https://2023.antflix.net#705.5_(A))", + "displayTitle": "(A) Output Compatibility", + "children": [], + "url": "https://2023.antflix.net#705.5_(A)" + }, + { + "body": "Synchronous generators operating in parallel with a primary power source shall be installed with the required synchronizing equipment. Informational Note: See IEEE 1547, Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces, and UL 1741, Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use with Distributed Energy Resources, for utility interconnection. [705.5_(B)](https://2023.antflix.net#705.5_(B))", + "displayTitle": "(B) Synchronous Generators", + "children": [], + "url": "https://2023.antflix.net#705.5_(B)" + } + ], + "url": "https://2023.antflix.net#705.5" + }, + { + "body": "Interconnection and interactive equipment intended to connect to or operate in parallel with power production sources shall be listed for the required interactive function or be evaluated for the interactive function and have a field label applied, or both. Informational Note No. 1: See UL 1741, Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use with Distributed Energy Resources, for evaluating interconnected equipment. Sources identified as stand-alone, interactive, or multimode are specifically identified and certified to operate in these operational modes. Stand-alone sources operate in island mode, interactive sources operate in interactive mode, and multimode sources operate in either island mode or interactive mode. Stand-alone sources are not evaluated for interactive capabilities. Informational Note No. 2: An interactive function is common in equipment such as microgrid interconnect devices, power control systems, interactive inverters, synchronous engine generators, ac energy storage systems, and ac wind turbines. [705.6](https://2023.antflix.net#705.6)", + "displayTitle": "705.6 Equipment Approval", + "children": [], + "url": "https://2023.antflix.net#705.6" + }, + { + "body": "Installation of one or more electrical power production sources operating in parallel with a primary source(s) of electricity shall be performed only by qualified persons. Informational Note: See Article 100 for the definition of Qualified Person. [705.8](https://2023.antflix.net#705.8)", + "displayTitle": "705.8 System Installation", + "children": [], + "url": "https://2023.antflix.net#705.8" + }, + { + "body": "Permanent plaques, labels, or directories shall be installed at each service equipment location, or at an approved readily visible location in accordance with the following: Denote the location of each power source disconnecting means for the building or structure.Exception: Installations with multiple colocated power production sources shall be permitted to be identified as a group(s). The plaque, label, or directory shall not be required to identify each power source individually.Indicate the emergency telephone numbers of any off-site entities servicing the power source systems.Informational Note: See NFPA 1-2021, Fire Code, 11.12.2.1.5 for installer information.Be marked with the wording \"CAUTION: MULTIPLE SOURCES OF POWER.\" The marking shall comply with 110.21(B). [705.10](https://2023.antflix.net#705.10)", + "displayTitle": "705.10 Identification of Power Sources", + "children": [], + "url": "https://2023.antflix.net#705.10" + }, + { + "displayTitle": "705.11 Source Connections to a Service", + "children": [ + { + "body": "An electric power production source shall be permitted to be connected to a service by one of the following methods: To a new service in accordance with 230.2(A)To the supply side of the service disconnecting means in accordance with 230.82(6)To an additional set of service entrance conductors in accordance with 230.40, Exception No. 5These connections shall comply with 705.11 (B) through (F). [705.11_(A)](https://2023.antflix.net#705.11_(A))", + "displayTitle": "(A) Service Connections", + "children": [], + "url": "https://2023.antflix.net#705.11_(A)" + }, + { + "body": "Service conductors connected to power production sources shall comply with the following: The ampacity of the service conductors connected to the power production source service disconnecting means shall not be less than the sum of the power production source maximum circuit current in 705.28(A).The service conductors connected to the power production source service disconnecting means shall be sized in accordance with 705.28 and not be smaller than 6 AWG copper or 4 AWG aluminum or copper-clad aluminum.The ampacity of any other service conductors to which the power production sources are connected shall not be less than that required in 705.11 (B). [705.11_(B)](https://2023.antflix.net#705.11_(B))", + "displayTitle": "(B) Conductors", + "children": [], + "url": "https://2023.antflix.net#705.11_(B)" + }, + { + "body": "Connections to service conductors or equipment shall comply with 705.11(C)(1) through (C)(3). [705.11_(C)](https://2023.antflix.net#705.11_(C))", + "displayTitle": "(C) Connections", + "children": [ + { + "body": "Service conductorsplices and taps shall be made in accordance with 230.33 or 230.46 and comply with all applicable enclosure fill requirements. [705.11_(C)_(1)](https://2023.antflix.net#705.11_(C)_(1))", + "displayTitle": "(1) Splices or Taps", + "children": [], + "url": "https://2023.antflix.net#705.11_(C)_(1)" + }, + { + "body": "Any modifications to existing equipment shall be made in accordance with the manufacturer's instructions, or the modification must be field evaluated for the application and be field labeled. [705.11_(C)_(2)](https://2023.antflix.net#705.11_(C)_(2))", + "displayTitle": "(2) Existing Equipment", + "children": [], + "url": "https://2023.antflix.net#705.11_(C)_(2)" + }, + { + "body": "For meter socket enclosures or other equipment under the exclusive control of the electric utility, only connections approved by the electric utility shall be permitted. [705.11_(C)_(3)](https://2023.antflix.net#705.11_(C)_(3))", + "displayTitle": "(3) Utility-Controlled Equipment", + "children": [], + "url": "https://2023.antflix.net#705.11_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#705.11_(C)" + }, + { + "body": "A disconnecting means in accordance with Parts VI through VII of Article 230 shall be provided to disconnect all ungrounded conductors of a power production source from the conductors of other systems. [705.11_(D)](https://2023.antflix.net#705.11_(D))", + "displayTitle": "(D) Service Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#705.11_(D)" + }, + { + "body": "All metal enclosures, metal wiring methods, and metal parts associated with the service connected to a power production source shall be bonded in accordance with Parts II through V and VIII of Article 250. [705.11_(E)](https://2023.antflix.net#705.11_(E))", + "displayTitle": "(E) Bonding and Grounding", + "children": [], + "url": "https://2023.antflix.net#705.11_(E)" + }, + { + "body": "The power production source service conductors shall be protected from overcurrent in accordance with Part VII of Article 230. The rating of the overcurrent protection device of the power production source service disconnecting means shall be used to determine if ground-fault protection of equipment is required in accordance with 230.95. [705.11_(F)](https://2023.antflix.net#705.11_(F))", + "displayTitle": "(F) Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#705.11_(F)" + } + ], + "url": "https://2023.antflix.net#705.11" + }, + { + "body": "The output of an interconnected electric power source shall be permitted to be connected to the load side of the service disconnecting means of the other source(s) at any distribution equipment on the premises. Where distribution equipment or feeders are fed simultaneously by a primary source of electricity and one or more other power source(s), the feeders or distribution equipment shall comply with relevant sections of 705.12(A) and (B). Currents from power source connections to feeders or busbars shall be based on the maximum circuit currents calculated in 705.28(A). The ampacity of feeders and taps shall comply with 705.12(A), and the ampere ratings of busbars shall comply with 705.12(B). [705.12](https://2023.antflix.net#705.12)", + "displayTitle": "705.12 Load-Side Source Connections", + "children": [ + { + "body": "Where the power source output connection is made to a feeder, the following shall apply: The feeder ampacity is greater than or equal to 125 percent of the power-source output circuit current.Where the power-source output connection is made at a location other than the opposite end of the feeder from the primary source overcurrent device, that portion of the feeder on the load side of the power source output connection shall be protected by one of the following:The feeder ampacity shall be not less than the sum of the rating of the primary source overcurrent device and 125 percent of the power-source output circuit current.An overcurrent device at the load side of the power source connection point shall be rated not greater than the ampacity of the feeder.For taps sized in accordance with 240.21(B)(2) or (B)(4). the ampacity of taps conductors shall not be less than one-third of the sum of the rating of the overcurrent device protecting the feeder plus the ratings of any power source overcurrent devices connected to the feeder. [705.12_(A)](https://2023.antflix.net#705.12_(A))", + "displayTitle": "(A) Feeders and Feeder Taps", + "children": [], + "url": "https://2023.antflix.net#705.12_(A)" + }, + { + "body": "For power source connections to distribution equipment with no specific listing and instructions for combining multiple sources, one of the following methods shall be used to determine the required ampere ratings of busbars: The sum of 125 percent of the power source(s) output circuit current and the rating of the overcurrent device protecting the busbar shall not exceed the busbar ampere rating.Informational Note: This general rule assumes no limitation in the number of the loads or sources applied to busbars or their locations.Where two sources, one a primary power source and the other another power source, are located at opposite ends of a busbar that contains loads, the sum of 125 percent of the power-source(s) output circuit current and the rating of the overcurrent device protecting the busbar shall not exceed 120 percent of the busbar ampere rating. The busbar shall be sized for the loads connected in accordance with Article 220. A permanent warning label shall be applied to the distribution equipment adjacent to the back-fed breaker from the power source that displays the following or equivalent wording:WARNING:POWER SOURCE OUTPUT DO NOT RELOCATETHIS OVERCURRENT DEVICE.The warning sign(s) or label(s) shall comply with 110.21(B).The sum of the ampere ratings of all overcurrent devices on panelboards, both load and supply devices, excluding the rating of the overcurrent device protecting the busbar, shall not exceed the ampacity of the busbar. The rating of the overcurrent device protecting the busbar shall not exceed the rating of the busbar. Permanent warning labels shall be applied to distribution equipment displaying the following or equivalent wording:WARNING:EQUIPMENT FED BY MULTIPLE SOURCES. TOTALRATING OF ALL OVERCURRENT DEVICES EXCLUDINGMAIN SUPPLY OVERCURRENT DEVICE SHALLNOT EXCEED AMPACITY OF BUSBAR.The warning sign(s) or label(s) shall comply with 110.21(B).A connection at either end of a center-fed panelboard in dwellings shall be permitted where the sum of 125 percent of the power-source(s) output circuit current and the rating of the overcurrent device protecting the busbar does not exceed 120 percent of the busbar ampere rating.Connections shall be permitted on busbars of panelboards that supply lugs connected to feed-through conductors or are supplied by feed-through conductors. The feed-through conductors shall be sized in accordance with 705.12(A). Where an overcurrent device is installed at either end of the feed-through conductors, panelboard busbars on either side of the feed-through conductors shall be permitted to be sized in accordance with 705.12(B)(1) through (B)(3).Connections shall be permitted on switchgear, switchboards, and panelboards in configurations other than those permitted in 705.12(B)(1) through (B)(5) where designed under engineering supervision that includes available fault-current and busbar load calculations.Informational Note: Specifically designed equipment exists, listed to UL 1741, Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, for the combination and distribution of sources to supply loads. The options provided in 705.12(B) are for equipment with no specific listing for combining sources. [705.12_(B)](https://2023.antflix.net#705.12_(B))", + "displayTitle": "(B) Busbars", + "children": [], + "url": "https://2023.antflix.net#705.12_(B)" + } + ], + "url": "https://2023.antflix.net#705.12" + }, + { + "body": "An EMS in accordance with 750.30 shall be permitted to limit current and loading on the busbars and conductors supplied by the output of one or more interconnected electric power production or energy storage sources. Informational Note: A listed power control system (PCS) is a type of EMS that is capable of monitoring multiple power sources and controlling the current on busbars and conductors to prevent overloading. See UL 1741, Inverters, Converters, Controllers and Interconnection System Equipment for Use with Distributed Energy Resources, and UL 916, Energy Management Equipment, for information on PCS and EMS. [705.13](https://2023.antflix.net#705.13)", + "displayTitle": "705.13 Energy Management Systems (EMS)", + "children": [], + "url": "https://2023.antflix.net#705.13" + }, + { + "body": "Means shall be provided to disconnect power source output conductors of electric power production equipment from conductors of other systems. A single disconnecting means shall be permitted to disconnect multiple power sources from conductors of other systems. Informational Note: See 480.7, Part II of Article 445, Part III of Article 690, Part III of Article 692, Part III of Article 694, and Part II of Article 706 for specific source disconnecting means requirements. The disconnecting means shall comply with the following:Be one of the following types:A manually operable switch or circuit breakerA load-break-rated pull-out switchA power-operated or remote-controlled switch or circuit breaker that is manually operable locally and opens automatically when control power is interruptedA device listed or approved for the intended applicationSimultaneously disconnect all ungrounded conductors of the circuitLocated where readily accessibleExternally operable without exposed live partsPlainly indicate whether in the open (off) or closed (on) positionHave ratings sufficient for the maximum circuit current, available fault current, and voltage that is available at the terminalsWhere the line and load terminals are capable of being energized in the open position, be marked with the following words or equivalent:WARNING ELECTRIC SHOCK HAZARD TERMINALS ON THELINE AND LOAD SIDES MAY BE ENERGIZED IN THEOPEN POSITION.Informational Note: With interconnected power sources, some equipment, including switches and fuses, is capable of being energized from both directions. [705.20](https://2023.antflix.net#705.20)", + "displayTitle": "705.20 Source Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#705.20" + }, + { + "body": "Power source output conductors shall comply with 705.25(A) through (C). [705.25](https://2023.antflix.net#705.25)", + "displayTitle": "705.25 Wiring Methods", + "children": [ + { + "body": "Wiring methods and fittings listed for use with power production systems shall be permitted in addition to general wiring methods and fittings permitted elsewhere in this Code. [705.25_(A)](https://2023.antflix.net#705.25_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#705.25_(A)" + }, + { + "body": "Flexible cords and cables, where used to connect the moving parts of power production equipment, or where used for ready removal for maintenance and repair, shall be listed and identified as DG cable, or other cable suitable for extra hard use, and shall be water resistant. Cables exposed to sunlight shall be sunlight resistant. Flexible, fine-stranded cables shall be terminated only with terminals, lugs, devices, or connectors in accordance with 110.14(A). [705.25_(B)](https://2023.antflix.net#705.25_(B))", + "displayTitle": "(B) Flexible Cords and Cables", + "children": [], + "url": "https://2023.antflix.net#705.25_(B)" + }, + { + "body": "Multiconductor cable assemblies used in accordance with their listings shall be permitted. Informational Note: See UL 3003, Distributed Generation Cables. and UL 9703, Outline of Investigation for Distributed Generation Wiring Harnesses, for additional information on DG cable (distributed generation cable) and harnesses. An ac module harness is one example of a multiconductor cable assemble. [705.25_(C)](https://2023.antflix.net#705.25_(C))", + "displayTitle": "(C) Multiconductor Cable Assemblies", + "children": [], + "url": "https://2023.antflix.net#705.25_(C)" + } + ], + "url": "https://2023.antflix.net#705.25" + }, + { + "displayTitle": "705.28 Circuit Sizing and Current", + "children": [ + { + "body": "Where not elsewhere required or permitted in this Code, the maximum current for power sources shall be calculated using one of the following methods: The sum of the continuous output current ratings of the power production equipment at the circuit nominal system voltageFor power production equipment controlled by an EMS, the current setpoint of the EMSWhere sources controlled by an EMS are combined with other sources on the same power source output circuit, the sum of 705.28(A)(1) and (A)(2) [705.28_(A)](https://2023.antflix.net#705.28_(A))", + "displayTitle": "(A) Power Source Output Maximum Current", + "children": [], + "url": "https://2023.antflix.net#705.28_(A)" + }, + { + "body": "Where not elsewhere required or permitted in this Code, the power source output conductors shall have an ampacity not less than the larger of the following and comply with 110.14(C): The maximum currents in 705.28(A) multiplied by 125 percent without adjustment or correction factorsException No. 1: If the assembly, including the overcurrent devices protecting the circuit, is listed for operation at 100 percent of its rating, the ampacity of the conductors shall be permitted to be not less than the calculated maximum current of 705.28(A).Exception No. 2: Where a portion of a circuit is connected at both its supply and load ends to separately installed pressure connections as covered in 110.14(C)(2), it shall be permitted to have an ampacity not less than the calculated maximum current of 705.28(A). No portion of the circuit installed under this exception shall extend into an enclosure containing either the circuit supply or the circuit load terminations, as covered in 110.14(C)(1).Exception No. 3: Grounded conductors that are not connected to an overcurrent device shall be permitted to be sized at 100 percent of the calculated maximum current of 705.28(A).The maximum currents in 705.28(A) after the application of adjustment and correction factors in accordance with 310.14Where connected to feeders, if smaller than the feeder conductors, the ampacity as calculated in 240.21(B) based on the over-current device protecting the feeder [705.28_(B)](https://2023.antflix.net#705.28_(B))", + "displayTitle": "(B) Conductor Ampacity", + "children": [], + "url": "https://2023.antflix.net#705.28_(B)" + }, + { + "body": "Neutral conductors shall be permitted to be sized in accordance with either 705.28(C)(1) or (C)(2). [705.28_(C)](https://2023.antflix.net#705.28_(C))", + "displayTitle": "(C) Neutral Conductors", + "children": [ + { + "body": "Where not elsewhere required or permitted in this Code, the ampacity of a neutral conductor to which a single-phase line-to-neutral power source is connected shall not be smaller than the ampacity in 705.28(B). [705.28_(C)_(1)](https://2023.antflix.net#705.28_(C)_(1))", + "displayTitle": "(1) Single-Phase Line-to-Neutral Power Sources", + "children": [], + "url": "https://2023.antflix.net#705.28_(C)_(1)" + }, + { + "body": "A power production equipment neutral conductor used solely for instrumentation, voltage detection, or phase detection shall be permitted to be sized in accordance with 250.102. [705.28_(C)_(2)](https://2023.antflix.net#705.28_(C)_(2))", + "displayTitle": "(2) Neutral Conductor Used Solely for Instrumentation. Voltage, Detection, or Phase Detection", + "children": [], + "url": "https://2023.antflix.net#705.28_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#705.28_(C)" + } + ], + "url": "https://2023.antflix.net#705.28" + }, + { + "displayTitle": "705.30 Overcurrent Protection", + "children": [ + { + "body": "Power source output conductors and equipment shall be provided with overcurrent protection. Circuits connected to more than one electrical source shall have overcurrent devices located to provide overcurrent protection from all sources. [705.30_(A)](https://2023.antflix.net#705.30_(A))", + "displayTitle": "(A) Circuit and Equipment", + "children": [], + "url": "https://2023.antflix.net#705.30_(A)" + }, + { + "body": "The overcurrent devices in other than generator systems shall be sized to carry not less than 125 percent of the maximum currents as calculated in 705.28(A). The rating or setting of overcurrent devices shall be permitted in accordance with 240.4(B) and (C). Exception: Circuits containing an assembly together with its overcurrent device(s) that is listed for continuous operation at 100 percent of its rating shall be permitted to be utilized at 100 percent of its rating. [705.30_(B)](https://2023.antflix.net#705.30_(B))", + "displayTitle": "(B) Overcurrent Device Ratings", + "children": [], + "url": "https://2023.antflix.net#705.30_(B)" + }, + { + "body": "Equipment containing overcurrent devices supplied from interconnected power sources shall be marked to indicate the presence of all sources. [705.30_(C)](https://2023.antflix.net#705.30_(C))", + "displayTitle": "(C) Marking", + "children": [], + "url": "https://2023.antflix.net#705.30_(C)" + }, + { + "body": "Fused disconnects, unless otherwise marked, shall be considered suitable for backfeed. Circuit breakers not marked \"line\" and \"load\" shall be considered suitable for backfeed. Circuit breakers marked \"line\" and \"load\" shall be considered suitable for backfeed or reverse current if specifically rated. [705.30_(D)](https://2023.antflix.net#705.30_(D))", + "displayTitle": "(D) Suitable for Backfeed", + "children": [], + "url": "https://2023.antflix.net#705.30_(D)" + }, + { + "body": "Listed plug-in-type circuit breakers backfed from electric power sources that are listed and identified as interactive shall be permitted to omit the additional fastener normally required by 408.36(D) for such applications. [705.30_(E)](https://2023.antflix.net#705.30_(E))", + "displayTitle": "(E) Fastening", + "children": [], + "url": "https://2023.antflix.net#705.30_(E)" + }, + { + "body": "The following apply to the installation of transformers: For the purpose of overcurrent protection, the primary side of transformers with sources on each side shall be the side connected to the largest source of available fault current.Transformer secondary conductors shall be protected in accordance with 240.21 (C). [705.30_(F)](https://2023.antflix.net#705.30_(F))", + "displayTitle": "(F) Transformers", + "children": [], + "url": "https://2023.antflix.net#705.30_(F)" + } + ], + "url": "https://2023.antflix.net#705.30" + }, + { + "body": "Where ground-fault protection of equipment is installed in ac circuits as required elsewhere in this Code, the output of interconnected power production equipment shall be connected to the supply side of the ground-fault protection equipment. Exception: Connection of power production equipment shall be permitted to be made to the load side of ground-fault protection equipment where installed in accordance with 705.11 or where there is ground-fault protection for equipment from all ground-fault current sources. [705.32](https://2023.antflix.net#705.32)", + "displayTitle": "705.32 Ground-Fault Protection", + "children": [], + "url": "https://2023.antflix.net#705.32" + }, + { + "body": "The output of interactive electric power production equipment shall be automatically disconnected from all ungrounded conductors of the primary source when one or more of the phases of the primary source to which it is connected opens. The interactive electric power production equipment shall not be reconnected to the primary source until all the phases of the primary source to which it is connected are restored. This requirement shall not be applicable to electric power production equipment providing power to an emergency or legally required standby system. Exception: A listed interactive inverter shall trip or shall be permitted to automatically cease exporting power when one or more of the phases of the interconnected primary source opens and shall not be required to automatically disconnect all ungrounded conductors from the primary source. A listed interactive inverter shall be permitted to automatically or manually resume exporting power to the interconnected system once all phases of the source to which it is connected are restored. Informational Note No. 1: Risks to personnel and equipment associated with the primary source could occur if an interactive electric power production source can operate as an intentional island. Special detection methods are required to determine that a primary source supply system outage has occurred and whether there should be automatic disconnection. When the primary source supply system is restored, special detection methods are typically required to limit exposure of power production sources to out-of-phase reconnection. Informational Note No. 2: Induction-generating equipment connected on systems with significant capacitance can become self-excited upon loss of the primary source and experience severe overvoltage as a result. Interactive power production equipment shall be permitted to operate in island mode to supply loads that have been disconnected from the electric utility or other electric power production and distribution network. [705.40](https://2023.antflix.net#705.40)", + "displayTitle": "705.40 Loss of Primary Source", + "children": [], + "url": "https://2023.antflix.net#705.40" + }, + { + "displayTitle": "705.45 Unbalanced Interconnections", + "children": [ + { + "body": "Single-phase power sources in interactive systems shall be connected to 3-phase power systems in order to limit unbalanced voltages at the point of interconnection to not more than 3 percent. Informational Note: For interactive power sources, unbalanced voltages can be minimized by the same methods that are used for single-phase loads on a 3-phase power system. See ANSI/ C84.1-2016, Electric Power Systems and Equipment - Voltage Ratings (60 Hertz). [705.45_(A)](https://2023.antflix.net#705.45_(A))", + "displayTitle": "(A) Single Phase", + "children": [], + "url": "https://2023.antflix.net#705.45_(A)" + }, + { + "body": "Three-phase power sources in interactive systems shall have all phases automatically de-energized upon loss of, or unbalanced, voltage in one or more phases unless the interconnected system is designed so that significant unbalanced voltages will not result. [705.45_(B)](https://2023.antflix.net#705.45_(B))", + "displayTitle": "(B) Three Phase", + "children": [], + "url": "https://2023.antflix.net#705.45_(B)" + } + ], + "url": "https://2023.antflix.net#705.45" + }, + { + "displayTitle": "Part II Microgrid Systems", + "children": [], + "url": "https://2023.antflix.net#divider_110_II" + }, + { + "body": "Interconnected microgrid systems shall be capable of operating in interactive mode with a primary source of power, or electric utility, or other electric power production and distribution network. Microgrid systems shall be permitted to disconnect from other sources and operate in island mode. Informational Note No. 1: Microgrid systems often include a single source or a compatible interconnection of multiple sources such as engine generators, solar PV, wind, or ESS. Informational Note No. 2: See Article 517 for health care facilities incorporating microgrids. [705.50](https://2023.antflix.net#705.50)", + "displayTitle": "705.50 System Operation", + "children": [], + "url": "https://2023.antflix.net#705.50" + }, + { + "body": "Connections to primary power sources that are external to the microgrid system shall comply with the requirements of 705.11, 705.12, or 705.13. Power source conductors connecting to a microgrid system, including conductors supplying distribution equipment, shall be considered as power source output conductors. [705.60](https://2023.antflix.net#705.60)", + "displayTitle": "705.60 Primary Power Source Connection", + "children": [], + "url": "https://2023.antflix.net#705.60" + }, + { + "body": "Microgrid systems that reconnect to primary power sources shall be provided with the necessary equipment to establish a synchronous transition. [705.65](https://2023.antflix.net#705.65)", + "displayTitle": "705.65 Reconnection to Primary Power Source", + "children": [], + "url": "https://2023.antflix.net#705.65" + }, + { + "body": "Microgrid interconnect devices shall comply with the following: Be required for any connection between a microgrid system and a primary power sourceBe evaluated for the application and have a field label applied or be listed for the applicationHave overcurrent devices located to provide overcurrent protection from all sourcesInformational Note: MID functionality is often incorporated in an interactive or multimode inverter, energy storage system, or similar device identified for interactive operation. [705.70](https://2023.antflix.net#705.70)", + "displayTitle": "705.70 Microgrid Interconnect Devices (MID)", + "children": [], + "url": "https://2023.antflix.net#705.70" + }, + { + "body": "Microgrid control systems shall comply with the following: Coordinate interaction between multiple power sources of similar or different types, manufacturers, and technologies (including energy storage)Be evaluated for the application and have a field label applied, or be listed, or be designed under engineering supervisionMonitor and control microgrid power production and power qualityMonitor and control transitions with a primary source external to the microgridInformational Note: MID functionality is often incorporated in an interactive or multimode inverter, energy storage system, or similar device identified for interactive operation. [705.76](https://2023.antflix.net#705.76)", + "displayTitle": "705.76 Microgrid Control System (MCS)", + "children": [], + "url": "https://2023.antflix.net#705.76" + }, + { + "displayTitle": "Part III Interconnected Systems Operating in Island Mode", + "children": [], + "url": "https://2023.antflix.net#divider_95_III" + }, + { + "body": "For interconnected power production sources that operate in island mode, capacity shall be calculated using the sum of all power source output maximum currents for the connected power production source. [705.80](https://2023.antflix.net#705.80)", + "displayTitle": "705.80 Power Source Capacity", + "children": [], + "url": "https://2023.antflix.net#705.80" + }, + { + "body": "Power sources operating in island mode shall be controlled so that voltage and frequency are supplied within limits compatible with the connected loads. [705.81](https://2023.antflix.net#705.81)", + "displayTitle": "705.81 Voltage and Frequency Control", + "children": [], + "url": "https://2023.antflix.net#705.81" + }, + { + "body": "Systems operating in island mode shall be permitted to supply 120 volts to single-phase, 3-wire, 120/240-volt distribution equipment where there are no 240-volt outlets and where there are no multiwire branch circuits. In all installations, the sum of the ratings of the power sources shall be less than the rating of the neutral bus in the distribution equipment. This equipment shall be marked with the following words or equivalent: WARNING:SINGLE 120-VOLT SUPPLYDO NOT CONNECT MULTIWIRE BRANCH CIRCUITS The warning sign(s) or label(s) shall comply with 110.21(B). [705.82](https://2023.antflix.net#705.82)", + "displayTitle": "705.82 Single 120-Volt Supply", + "children": [], + "url": "https://2023.antflix.net#705.82" + } + ], + "url": "https://2023.antflix.net#705" + }, + { + "displayTitle": "Article 706 Energy Storage Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_111_I" + }, + { + "body": "This article applies to all energy storage systems (ESS) having a capacity greater than 3.6 MJ (1 kWh) that may be stand-alone or interactive with other electric power production sources. These systems are primarily intended to store and provide energy during normal operating conditions. Informational Note No. 1: See Article 480 for installations that meet the definition of stationary standby batteries. Informational Note No. 2: For batteries rated in ampere hours, kWh is equal to the nominal rated voltage times ampere-hour rating divided by 1000. Informational Note No. 3: The following standards are frequently referenced for the installation of ESSs:NFPA 1-2021, Fire CodeNFPA 111-2019, Standard on Stored Electrical Energy Emergency and Standby Power SystemsNECA 416-2016, Recommended Practice for Installing Energy Storage Systems (ESS)UL 810A, Electrochemical CapacitorsNFPA 855-2020, Standard for the Installation of Stationary Energy Storage SystemsUL 1973, Standard for Batteries for Use in Stationary, Vehicle Auxiliary Power, and Light Electric Rail (LER) ApplicationsUL 1989, Standard for Standby BatteriesUL 9540, Standard for Safety Energy Storage Systems and EquipmentUL Subject 2436, Spill Containment For Stationary Lead Acid Battery Systems [706.1](https://2023.antflix.net#706.1)", + "displayTitle": "706.1 Scope", + "children": [], + "url": "https://2023.antflix.net#706.1" + }, + { + "body": "The installation and maintenance of ESS equipment and all associated wiring and interconnections shall be performed only by qualified persons. Informational Note: See Article 100 for the definition of qualified person. [706.3](https://2023.antflix.net#706.3)", + "displayTitle": "706.3 Qualified Personnel", + "children": [], + "url": "https://2023.antflix.net#706.3" + }, + { + "body": "Each ESS shall be provided with a nameplate plainly visible after installation and marked with the following: Manufacturer's name, trademark, or other descriptive marking by which the organization responsible for supplying the ESS can be identifiedRated frequencyNumber of phases, if acRating (kW or kVA)Available fault current derived by the ESS at the output terminalsMaximum output and input current of the ESS at the output terminalsMaximum output and input voltage of the ESS at the output terminalsUtility-interactive capability, if applicable [706.4](https://2023.antflix.net#706.4)", + "displayTitle": "706.4 System Requirements", + "children": [], + "url": "https://2023.antflix.net#706.4" + }, + { + "body": "Energy storage systems shall be listed. [706.5](https://2023.antflix.net#706.5)", + "displayTitle": "706.5 Listing", + "children": [], + "url": "https://2023.antflix.net#706.5" + }, + { + "body": "Multiple ESSs shall be permitted to be installed on the same premises. [706.6](https://2023.antflix.net#706.6)", + "displayTitle": "706.6 Multiple Systems", + "children": [], + "url": "https://2023.antflix.net#706.6" + }, + { + "displayTitle": "706.7 Commissioning and Maintenance", + "children": [ + { + "body": "ESSs shall be commissioned upon installation. This shall not apply in one- and two-family dwellings. Informational Note: See NFPA 855-2020, Standard for the Installation of Stationary Energy Storage Systems, for information related to the commissioning of ESSs. [706.7_(A)](https://2023.antflix.net#706.7_(A))", + "displayTitle": "(A) Commissioning", + "children": [], + "url": "https://2023.antflix.net#706.7_(A)" + }, + { + "body": "ESSs shall be maintained in proper and safe operating condition. The required maintenance shall be in accordance with the manufacturer's requirements and industry standards. A written record of the system maintenance shall be kept and shall include records of repairs and replacements necessary to maintain the system in proper and safe operating condition. This shall not apply in one- and two-family dwellings. Informational Note: See NFPA 70B-2019, Recommended Practice for Electrical Equipment Maintenance, or ANSI/NETA ATS-2017, Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems, for information related to general electrical equipment maintenance and developing an effective electrical preventive maintenance (EPM) program. [706.7_(B)](https://2023.antflix.net#706.7_(B))", + "displayTitle": "(B) Maintenance", + "children": [], + "url": "https://2023.antflix.net#706.7_(B)" + } + ], + "url": "https://2023.antflix.net#706.7" + }, + { + "body": "The maximum voltage of an ESS shall be the rated ESS input and output voltage(s) indicated on the ESS nameplate(s) or system listing. [706.9](https://2023.antflix.net#706.9)", + "displayTitle": "706.9 Maximum Voltage", + "children": [], + "url": "https://2023.antflix.net#706.9" + }, + { + "displayTitle": "Part II Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#divider_111_II" + }, + { + "displayTitle": "706.15 Disconnecting Means", + "children": [ + { + "body": "Means shall be provided to disconnect the ESS from all wiring systems, including other power systems, utilization equipment, and its associated premises wiring. [706.15_(A)](https://2023.antflix.net#706.15_(A))", + "displayTitle": "(A) ESS Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#706.15_(A)" + }, + { + "body": "The disconnecting means shall be readily accessible and shall comply with one or more of the following: Located within the ESSLocated within sight and within 3 m (10 ft) from the ESSWhere not located within sight of the ESS, the disconnecting means, or the enclosure providing access to the disconnecting means, shall be capable of being locked in accordance with 110.25Where controls to activate the disconnecting means of an ESS are used and are not located within sight of the ESS, the disconnecting means shall be lockable in accordance with 110.25, and the location of the controls shall be marked on the disconnecting means.For one- and two-family dwellings, an ESS shall include an emergency shutdown function to cease the export of power from the ESS to premises wiring of other systems. An initiation device(s) shall be located at a readily accessible location outside the building and shall plainly indicate whether in the \"off\" or \"on\" position. The \"off\" position of the device(s) shall perform the ESS emergency shutdown function. [706.15_(B)](https://2023.antflix.net#706.15_(B))", + "displayTitle": "(B) Location and Control", + "children": [], + "url": "https://2023.antflix.net#706.15_(B)" + }, + { + "body": "Each ESS disconnecting means shall plainly indicate whether it is in the open (off) or closed (on) position and be permanently marked as follows: \"ENERGY STORAGE SYSTEM DISCONNECT\" The disconnecting means shall be legibly marked in the field to indicate the following:Nominal ESS output voltageAvailable fault current derived from the ESSAn arc-flash label applied in accordance with acceptable industry practiceDate the calculation was performedException: List items (2), (3), and (4) shall not apply to one- and two- family dwellings.Informational Note No. 1: See NFPA 70E-2018, Standard for Electrical Safety in the Workplace, for industry practices for equipment labeling. This standard provides specific criteria for developing arc-flash labels for equipment that provides nominal system voltage, incident energy levels, arc-flash boundaries, minimum required levels of personal protective equipment, and so forth.Informational Note No. 2: ESS electronics could include inverters or other types of power conversion equipment.For ESS disconnecting means where the line and load terminals could be energized in the open position, the device shall be marked with the following words or equivalent:WARNINGELECTRIC SHOCK HAZARDTERMINALS ON THE LINE AND LOAD SIDES MAY BEENERGIZED IN THE OPEN POSITIONThe notification(s) and marking(s) shall comply with 110.21(B). [706.15_(C)](https://2023.antflix.net#706.15_(C))", + "displayTitle": "(C) Notification and Marking", + "children": [], + "url": "https://2023.antflix.net#706.15_(C)" + }, + { + "body": "Where circuits from the input or output terminals of energy storage components in an ESS pass through a wall, floor, or ceiling, a readily accessible disconnecting means shall be provided within sight of the energy storage component. Fused disconnecting means or circuit breakers shall be permitted to be used. [706.15_(D)](https://2023.antflix.net#706.15_(D))", + "displayTitle": "(D) Partitions Between Components", + "children": [], + "url": "https://2023.antflix.net#706.15_(D)" + }, + { + "body": "In cases where the battery is separate from the ESS electronics and is subject to field servicing, 706.15(E)(1) through (E)(4) shall apply. Informational Note: Batteries could include an enclosure, battery monitoring and controls, or other related battery components. [706.15_(E)](https://2023.antflix.net#706.15_(E))", + "displayTitle": "(E) Disconnecting Means for Batteries", + "children": [ + { + "body": "A disconnecting means shall be provided for all ungrounded conductors. A disconnecting means shall be readily accessible and located within sight of the battery. Informational Note: See 240.21(H) for information on the location of the overcurrent device for battery conductors. [706.15_(E)_(1)](https://2023.antflix.net#706.15_(E)_(1))", + "displayTitle": "(1) Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#706.15_(E)_(1)" + }, + { + "body": "Battery circuits exceeding 240 volts dc nominal between conductors or to ground shall have provisions to disconnect the series-connected strings into segments not exceeding 240 volts dc nominal for maintenance by qualified persons. Non-load-break bolted or plug-in disconnects shall be permitted. [706.15_(E)_(2)](https://2023.antflix.net#706.15_(E)_(2))", + "displayTitle": "(2) Disconnection of Series Battery Circuits", + "children": [], + "url": "https://2023.antflix.net#706.15_(E)_(2)" + }, + { + "body": "Where a disconnecting means is provided with remote controls to activate the disconnecting means and the controls for the disconnecting means are not located within sight of the battery, the disconnecting means shall be capable of being locked in the open position, in accordance with 110.25, and the location of the controls shall be field marked on the disconnecting means. [706.15_(E)_(3)](https://2023.antflix.net#706.15_(E)_(3))", + "displayTitle": "(3) Remote Activation", + "children": [], + "url": "https://2023.antflix.net#706.15_(E)_(3)" + }, + { + "body": "The disconnecting means shall be legibly marked in the field. The marking shall be of sufficient durability to withstand the environment involved and shall include the following: Nominal battery voltageAvailable fault current derived from the stationary standby battery systemInformational Note No. 1: Battery equipment suppliers can provide information about available fault current on any particular battery model.An arc-flash label in accordance with acceptable industry practiceInformational Note No. 2: See NFPA 70E-2021, Standard for Electrical Safety in the Workplace, for assistance in determining the severity of potential exposure, planning safe work practices, determining arc-flash labeling, and selecting personal protective equipment.Date the calculation was performed [706.15_(E)_(4)](https://2023.antflix.net#706.15_(E)_(4))", + "displayTitle": "(4) Notification", + "children": [], + "url": "https://2023.antflix.net#706.15_(E)_(4)" + } + ], + "url": "https://2023.antflix.net#706.15_(E)" + } + ], + "url": "https://2023.antflix.net#706.15" + }, + { + "body": "The connection of an ESS to sources of energy shall comply with 706.16(A) through (F). [706.16](https://2023.antflix.net#706.16)", + "displayTitle": "706.16 Connection to Energy Sources", + "children": [ + { + "body": "A disconnect that has multiple sources of power shall disconnect all energy sources when in the off position. [706.16_(A)](https://2023.antflix.net#706.16_(A))", + "displayTitle": "(A) Source Disconnect", + "children": [], + "url": "https://2023.antflix.net#706.16_(A)" + }, + { + "body": "ESS that operate in parallel with other ac sources shall use inverters that are listed and identified as interactive. [706.16_(B)](https://2023.antflix.net#706.16_(B))", + "displayTitle": "(B) Identified Interactive Equipment", + "children": [], + "url": "https://2023.antflix.net#706.16_(B)" + }, + { + "body": "Upon loss of a primary source of power, an ESS with a utility-interactive inverter shall comply with the requirements of 705.40. [706.16_(C)](https://2023.antflix.net#706.16_(C))", + "displayTitle": "(C) Loss of Interactive System Power", + "children": [], + "url": "https://2023.antflix.net#706.16_(C)" + }, + { + "body": "Unbalanced ac connections between an ESS and other ac electric power production sources shall be in accordance with 705.45 [706.16_(D)](https://2023.antflix.net#706.16_(D))", + "displayTitle": "(D) Unbalanced Interconnections", + "children": [], + "url": "https://2023.antflix.net#706.16_(D)" + }, + { + "body": "The connection of an ESS to other energy sources shall be in accordance with 705.12. [706.16_(E)](https://2023.antflix.net#706.16_(E))", + "displayTitle": "(E) Other Energy Sources", + "children": [], + "url": "https://2023.antflix.net#706.16_(E)" + }, + { + "body": "Where the output of an ESS is capable of operating in stand-alone mode, the requirements of 710.15 shall apply. [706.16_(F)](https://2023.antflix.net#706.16_(F))", + "displayTitle": "(F) Stand-Alone Operation", + "children": [], + "url": "https://2023.antflix.net#706.16_(F)" + } + ], + "url": "https://2023.antflix.net#706.16" + }, + { + "displayTitle": "Part III Installation Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_96_III" + }, + { + "displayTitle": "706.20 General", + "children": [ + { + "body": "Provisions appropriate to the energy storage technology shall be made for sufficient diffusion and ventilation of any possible gases from the storage device, if present, to prevent the accumulation of an explosive mixture. Ventilation of an ESS shall be permitted to be provided in accordance with the manufacturer's recommendations and listing for the system. Informational Note No. 1: See NFPA 855-2020, Standard for the Installation of Stationary Energy Storage Systems, for technology-specific guidance. Not all ESS technologies require ventilation. Informational Note No. 2: See IEEE 1635-2018/ASHRAE Guideline 21-2018, Guide for the Ventilation and Thermal Management of Batteries for Stationary Applications, as a source for design of ventilation of batteries. [706.20_(A)](https://2023.antflix.net#706.20_(A))", + "displayTitle": "(A) Ventilation", + "children": [], + "url": "https://2023.antflix.net#706.20_(A)" + }, + { + "body": "An ESS for one- and two-family dwelling units shall not exceed 100 volts dc between conductors or to ground. Exception: Where live parts are not accessible during routine ESS maintenance, a maximum ESS voltage of 600 volts dc shall be permitted. [706.20_(B)](https://2023.antflix.net#706.20_(B))", + "displayTitle": "(B) Dwelling Units", + "children": [], + "url": "https://2023.antflix.net#706.20_(B)" + }, + { + "displayTitle": "(C) Spaces About ESS Components", + "children": [ + { + "body": "Working spaces for ESS shall comply with 110.26 and 110.34. [706.20_(C)_(1)](https://2023.antflix.net#706.20_(C)_(1))", + "displayTitle": "(1) General", + "children": [], + "url": "https://2023.antflix.net#706.20_(C)_(1)" + }, + { + "body": "ESSs shall be permitted to have space between components in accordance with the manufacturer's instructions and listing. Informational Note: Additional space may be needed to accommodate ESS hoisting equipment, tray removal, or spill containment. [706.20_(C)_(2)](https://2023.antflix.net#706.20_(C)_(2))", + "displayTitle": "(2) Space Between Components", + "children": [], + "url": "https://2023.antflix.net#706.20_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#706.20_(C)" + } + ], + "url": "https://2023.antflix.net#706.20" + }, + { + "body": "ESS shall be indicated by markings or labels that shall be in accordance with 110.21(B). [706.21](https://2023.antflix.net#706.21)", + "displayTitle": "706.21 Directory (Identification of Power Sources)", + "children": [ + { + "body": "Plaques or directories shall be installed in accordance with 705.10. [706.21_(A)](https://2023.antflix.net#706.21_(A))", + "displayTitle": "(A) Facilities With Utility Services and ESS", + "children": [], + "url": "https://2023.antflix.net#706.21_(A)" + }, + { + "body": "Plaques or directories shall be installed in accordance with 710.10. [706.21_(B)](https://2023.antflix.net#706.21_(B))", + "displayTitle": "(B) Facilities With Stand-Alone Systems", + "children": [], + "url": "https://2023.antflix.net#706.21_(B)" + } + ], + "url": "https://2023.antflix.net#706.21" + }, + { + "displayTitle": "Part IV Circuit Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_40_IV" + }, + { + "displayTitle": "706.30 Circuit Sizing and Current", + "children": [ + { + "body": "The maximum current for the specific circuit shall be calculated in accordance with 706.30(A)(1) through (A)(5). [706.30_(A)](https://2023.antflix.net#706.30_(A))", + "displayTitle": "(A) Maximum Rated Current for a Specific Circuit", + "children": [ + { + "body": "Circuit current shall be the rated current indicated on the ESS nameplate(s) or system listing. Where the ESS has separate input (charge) and output (discharge) circuits or ratings, these shall be considered individually. Where the same terminals on the ESS are used for charging and discharging, the rated current shall be the greater of the two. [706.30_(A)_(1)](https://2023.antflix.net#706.30_(A)_(1))", + "displayTitle": "(1) Nameplate-Rated Circuit Current", + "children": [], + "url": "https://2023.antflix.net#706.30_(A)_(1)" + }, + { + "body": "The maximum current shall be the inverter continuous output current rating. [706.30_(A)_(2)](https://2023.antflix.net#706.30_(A)_(2))", + "displayTitle": "(2) Inverter Output Circuit Current", + "children": [], + "url": "https://2023.antflix.net#706.30_(A)_(2)" + }, + { + "body": "The maximum current shall be the continuous inverter input current rating when the inverter is producing rated power at the lowest input voltage. [706.30_(A)_(3)](https://2023.antflix.net#706.30_(A)_(3))", + "displayTitle": "(3) Inverter Input Circuit Current", + "children": [], + "url": "https://2023.antflix.net#706.30_(A)_(3)" + }, + { + "body": "The maximum current shall be the continuous ac output current rating of the inverter when the inverter is producing rated power. [706.30_(A)_(4)](https://2023.antflix.net#706.30_(A)_(4))", + "displayTitle": "(4) Inverter Utilization Output Circuit Current", + "children": [], + "url": "https://2023.antflix.net#706.30_(A)_(4)" + }, + { + "body": "The maximum current shall be the dc-to-dc converter continuous output current rating. [706.30_(A)_(5)](https://2023.antflix.net#706.30_(A)_(5))", + "displayTitle": "(5) DC to DC Converter Output Current", + "children": [], + "url": "https://2023.antflix.net#706.30_(A)_(5)" + } + ], + "url": "https://2023.antflix.net#706.30_(A)" + }, + { + "body": "The ampacity of the output circuit conductors of the ESS(s) connected to the wiring system serving the loads to be serviced by the system shall not be less than the greater of the nameplate(s)-rated circuit current as determined in accordance with 706.30(A)(1) or the rating of the ESS(s) overcurrent protective device(s). [706.30_(B)](https://2023.antflix.net#706.30_(B))", + "displayTitle": "(B) Conductor Ampacity", + "children": [], + "url": "https://2023.antflix.net#706.30_(B)" + }, + { + "body": "If the output of a single-phase, 2-wire ESS output(s) is connected to the grounded or neutral conductor and a single ungrounded conductor of a 3-wire system or of a 3-phase, 4-wire, wye-connected system, the maximum unbalanced neutral load current plus the ESS(s) output rating shall not exceed the ampacity of the grounded or neutral conductor. [706.30_(C)](https://2023.antflix.net#706.30_(C))", + "displayTitle": "(C) Ampacity of Grounded or Neutral Conductor", + "children": [], + "url": "https://2023.antflix.net#706.30_(C)" + } + ], + "url": "https://2023.antflix.net#706.30" + }, + { + "displayTitle": "706.31 Overcurrent Protection", + "children": [ + { + "body": "Protection devices for ESS circuits shall be in accordance with 706.31(B) through (F). Circuits shall be protected at the source from overcurrent. A circuit conductor connected at one end to a supply with integral fault protection, where the conductor is rated for the maximum circuit current from that supply, and also connected to sources having an available maximum circuit current greater than the ampacity of the conductor, shall be protected from overcurrent at the point of connection to the higher current source. Informational Note: Listed electronic power converter circuits powered by an ESS have integral fault protection. Where these circuits are connected to higher current sources such as a utility service, the overcurrent device is more appropriately installed at the higher current source end of the circuit conductor. [706.31_(A)](https://2023.antflix.net#706.31_(A))", + "displayTitle": "(A) Circuits and Equipment", + "children": [], + "url": "https://2023.antflix.net#706.31_(A)" + }, + { + "body": "Overcurrent protective devices, where required, shall be not less than 125 percent of the maximum currents calculated in 706.30(A). Exception: Where the assembly, including the overcurrent protective devices, is listed for operation at 100 percent of its rating, the ampere rating of the overcurrent devices shall be permitted to be not less than the maximum currents calculated in 706.30(B). [706.31_(B)](https://2023.antflix.net#706.31_(B))", + "displayTitle": "(B) Overcurrent Device Ampere Ratings", + "children": [], + "url": "https://2023.antflix.net#706.31_(B)" + }, + { + "body": "Overcurrent protective devices, either fuses or circuit breakers, used in any dc portion of an ESS shall be listed for dc and shall have the appropriate voltage, current, and interrupting ratings for the application. [706.31_(C)](https://2023.antflix.net#706.31_(C))", + "displayTitle": "(C) Direct Current Rating", + "children": [], + "url": "https://2023.antflix.net#706.31_(C)" + }, + { + "body": "A listed and labeled current-limiting overcurrent protective device shall be installed adjacent to the ESS for each dc output circuit. Exception: Where current-limiting overcurrent protection is provided for the dc output circuits of a listed ESS, additional current-limiting overcurrent devices shall not be required. [706.31_(D)](https://2023.antflix.net#706.31_(D))", + "displayTitle": "(D) Current Limiting", + "children": [], + "url": "https://2023.antflix.net#706.31_(D)" + }, + { + "body": "Means shall be provided to disconnect any fuses associated with ESS equipment and components when the fuse is energized from both directions and is accessible to other than qualified persons. Switches, pullouts, or similar devices that are rated for the application shall be permitted to serve as a means to disconnect fuses from all sources of supply. [706.31_(E)](https://2023.antflix.net#706.31_(E))", + "displayTitle": "(E) Fuses", + "children": [], + "url": "https://2023.antflix.net#706.31_(E)" + }, + { + "body": "Where circuits from the input or output terminals of energy storage components in an ESS pass through a wall, floor, or ceiling, overcurrent protection shall be provided at the energy storage component end of the circuit. [706.31_(F)](https://2023.antflix.net#706.31_(F))", + "displayTitle": "(F) Location", + "children": [], + "url": "https://2023.antflix.net#706.31_(F)" + } + ], + "url": "https://2023.antflix.net#706.31" + }, + { + "displayTitle": "706.33 Charge Control", + "children": [ + { + "body": "Provisions shall be provided to control the charging process of the ESS. All adjustable means for control of the charging process shall be accessible only to qualified persons. [706.33_(A)](https://2023.antflix.net#706.33_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#706.33_(A)" + }, + { + "displayTitle": "(B) Diversion Charge Controller", + "children": [ + { + "body": "An ESS employing a diversion charge controller as the sole means of regulating charging shall be equipped with a second independent means to prevent overcharging of the storage device. [706.33_(B)_(1)](https://2023.antflix.net#706.33_(B)_(1))", + "displayTitle": "(1) Sole Means of Regulating Charging", + "children": [], + "url": "https://2023.antflix.net#706.33_(B)_(1)" + }, + { + "body": "Circuits containing a diversion charge controller and a diversion load shall comply with the following: The current rating of the diversion load shall be less than or equal to the current rating of the diversion load charge controller. The voltage rating of the diversion load shall be greater than the maximum ESS voltage. The power rating of the diversion load shall be at least 150 percent of the power rating of the charging source.The conductor ampacity and the rating of the overcurrent device for this circuit shall be at least 150 percent of the maximum current rating of the diversion charge controller. [706.33_(B)_(2)](https://2023.antflix.net#706.33_(B)_(2))", + "displayTitle": "(2) Circuits With Diversion Charge Controller and Diversion Load", + "children": [], + "url": "https://2023.antflix.net#706.33_(B)_(2)" + }, + { + "body": "Systems using interactive inverters to control energy storage state-of-charge by diverting excess power into an alternate electric power production and distribution system, such as utility, shall comply with 706.33(B)(3)(a) and (B)(3)(b). These systems shall not be required to comply with 706.33(B)(2).These systems shall have a second, independent means of controlling the ESS charging process for use when the alternate system is not available or when the primary charge controller fails or is disabled. [706.33_(B)_(3)](https://2023.antflix.net#706.33_(B)_(3))", + "displayTitle": "(3) ESS Using Interactive Inverters", + "children": [], + "url": "https://2023.antflix.net#706.33_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#706.33_(B)" + }, + { + "body": "Where charge controllers and other DC-to-DC power converters that increase or decrease the output current or output voltage with respect to the input current or input voltage are installed, all of the following shall apply: The ampacity of the conductors in output circuits shall be based on the maximum rated continuous output current of the charge controller or converter for the selected output voltage range.The voltage rating of the output circuits shall be based on the maximum voltage output of the charge controller or converter for the selected output voltage range. [706.33_(C)](https://2023.antflix.net#706.33_(C))", + "displayTitle": "(C) Charge Controllers and DC-to-DC Converters", + "children": [], + "url": "https://2023.antflix.net#706.33_(C)" + } + ], + "url": "https://2023.antflix.net#706.33" + }, + { + "body": "Part V applies to ESSs composed of or containing flow batteries. Informational Note: Due to the unique design features and difference in operating characteristics of flow batteries as compared with that of storage batteries such as lead acid or lithium ion batteries, the requirements for flow batteries have been included herein (Article 706, Part V). [V](https://2023.antflix.net#V)", + "displayTitle": "Part V Flow Battery ESSs", + "children": [], + "url": "https://2023.antflix.net#V" + }, + { + "body": "The system and system components shall also meet Parts I, II, and III of this article. Informational Note: See NFPA 855-2020, Standard for the Installation of Stationary Energy Storage Systems, for installation requirements for ESS, including requirements for flow batteries. [706.40](https://2023.antflix.net#706.40)", + "displayTitle": "706.40 General", + "children": [], + "url": "https://2023.antflix.net#706.40" + }, + { + "body": "The electrolyte(s) that are acceptable for use in the batteries associated with the ESS shall be identified by name and chemical composition. Such identification shall be provided by readily discernable signage adjacent to every location in the system where the electrolyte can be put into or taken out of the system. [706.41](https://2023.antflix.net#706.41)", + "displayTitle": "706.41 Electrolyte Classification", + "children": [], + "url": "https://2023.antflix.net#706.41" + }, + { + "body": "Flow battery systems shall be provided with a means for electrolyte containment to prevent spills of electrolyte from the system. An alarm system shall be provided to signal an electrolyte leak from the system. Electrical wiring and connections shall be located and routed in a manner that mitigates the potential for exposure to electrolytes. [706.42](https://2023.antflix.net#706.42)", + "displayTitle": "706.42 Electrolyte Containment", + "children": [], + "url": "https://2023.antflix.net#706.42" + }, + { + "body": "Controls shall be provided to safely shut down the system in the event of electrolyte blockage. [706.43](https://2023.antflix.net#706.43)", + "displayTitle": "706.43 Flow Controls", + "children": [], + "url": "https://2023.antflix.net#706.43" + }, + { + "body": "Pumps and other fluid handling equipment are to be rated/specified suitable for exposure to the electrolytes. [706.44](https://2023.antflix.net#706.44)", + "displayTitle": "706.44 Pumps and Other Fluid Handling Equipment", + "children": [], + "url": "https://2023.antflix.net#706.44" + }, + { + "body": "Part VI Applies to ESSs Using Other Technologies Intended to Store Energy and When There Is a Demand for Electrical Power to Use the Stored Energy to Generate the Needed Power [divider_21_VI](https://2023.antflix.net#divider_21_VI)", + "displayTitle": "Part VI Other Energy Storage Technologies", + "children": [], + "url": "https://2023.antflix.net#divider_21_VI" + }, + { + "body": "All electrical connections to and from the system and system components shall be in accordance with the applicable provisions of this Code. The systems shall comply with Parts I, II, III, and IV of this article. [706.50](https://2023.antflix.net#706.50)", + "displayTitle": "706.50 General", + "children": [], + "url": "https://2023.antflix.net#706.50" + }, + { + "body": "Flywheel ESS (FESS) using flywheels as the storage mechanism shall also comply with all of the following: FESS shall not be used for one- or two-family dwelling units.Informational Note No. 1: FESS are intended for high-power shorter term applications. They contain parts that rotate under high speed with hazardous kinetic energy and include parts such as magnetic bearings that require ongoing monitoring and maintenance and, therefore, are not suitable for residential-type applications.FESS shall be provided with bearing monitoring and controls that can identify bearing wear or damage to avoid catastrophic failure.Informational Note No. 2: The bearing monitoring controls should be evaluated as part of the listing evaluation.FESS shall be provided with a containment means to contain moving parts that could break from the system upon catastrophic failure.Informational Note No. 3: The containment means should be evaluated as part of the listing evaluation.The spin-down time of the FESS shall be provided in the maintenance documentation. [706.51](https://2023.antflix.net#706.51)", + "displayTitle": "706.51 Flywheel ESS (FESS)", + "children": [], + "url": "https://2023.antflix.net#706.51" + } + ], + "url": "https://2023.antflix.net#706" + }, + { + "displayTitle": "Article 708 Critical Operations Power Systems (COPS)", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_112_I" + }, + { + "body": "This article applies to the installation, operation, monitoring, control, and maintenance of the portions of the premises wiring system intended to supply, distribute, and control electricity to designated critical operations areas (DCOA) in the event of disruption to elements of the normal system. Critical operations power systems are those systems so classed by municipal, state, federal, or other codes by any governmental agency having jurisdiction or by facility engineering documentation establishing the necessity for such a system. These systems include but are not limited to power systems, HVAC, fire alarm, security, communications, and signaling for designated critical operations areas. Informational Note No. 1: Critical operations power systems are generally installed in vital infrastructure facilities that, if destroyed or incapacitated, would disrupt national security, the economy, public health or safety; and where enhanced electrical infrastructure for continuity of operation has been deemed necessary by governmental authority. Informational Note No. 2: See NFPA 1600-2019, Standard on Continuity, Emergency, and Crisis Management, for further information on disaster and emergency management. Informational Note No. 3: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, for further information regarding performance of emergency and standby power systems. Informational Note No. 4: See NFPA 707-2021, Life Safety Code, or the applicable building code, for specification of locations where emergency lighting is considered essential to life safety. Informational Note No. 5: See NFPA 730-2020, Guide for Premises Security, and ANSI/TIA-5017-2016, Telecommunications Physical Network Security Standard, for further information regarding physical security. Informational Note No. 6: See NFPA 1600-2019, Standard on Continuity, Emergency, and Crisis Management, A.5.3.2. Threats to facilities that may require transfer of operation to the critical systems include both naturally occurring hazards and human-caused events. Informational Note No. 7: See Informative Annex F, Availability and Reliability for Critical Operations Power Systems; and Development and Implementation of Functional Performance Tests (FPTs) for Critical Operations Power Systems. Informational Note No. 8: See Informative Annex G, Supervisory Control and Data Acquisition (SCADA). Informational Note No. 9: Text that is followed by a reference in brackets has been extracted from NFPA 1600-2019, Standard on Continuity, Emergency, and Crisis Management. Only editorial changes were made to the extracted text to make it consistent with this Code. [708.1](https://2023.antflix.net#708.1)", + "displayTitle": "708.1 Scope", + "children": [], + "url": "https://2023.antflix.net#708.1" + }, + { + "body": "Reconditioned transfer switches shall not be permitted. [708.2](https://2023.antflix.net#708.2)", + "displayTitle": "708.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#708.2" + }, + { + "body": "Risk assessment for critical operations power systems shall be documented and shall be conducted in accordance with 708.4(A) through (C). Informational Note: See NFPA 1600-2019, Standard on Continuity, Emergency, and Crisis Management, Chapter 5, which provides additional guidance concerning risk assessment and hazard analysis. [708.4](https://2023.antflix.net#708.4)", + "displayTitle": "708.4 Risk Assessment", + "children": [ + { + "body": "In critical operations power systems, risk assessment shall be performed to identify hazards, the likelihood of their occurrence, and the vulnerability of the electrical system to those hazards. [708.4_(A)](https://2023.antflix.net#708.4_(A))", + "displayTitle": "(A) Conducting Risk Assessment", + "children": [], + "url": "https://2023.antflix.net#708.4_(A)" + }, + { + "body": "Hazards to be considered at a minimum shall include, but shall not be limited to, the following: Naturally occurring hazards (geological, meteorological, and biological)Human-caused events (accidental and intentional) [708.4_(B)](https://2023.antflix.net#708.4_(B))", + "displayTitle": "(B) Identification of Hazards", + "children": [], + "url": "https://2023.antflix.net#708.4_(B)" + }, + { + "body": "Based on the results of the risk assessment, a strategy shall be developed and implemented to mitigate the hazards that have not been sufficiently mitigated by the prescriptive requirements of this Code. [708.4_(C)](https://2023.antflix.net#708.4_(C))", + "displayTitle": "(C) Developing Mitigation Strategy", + "children": [], + "url": "https://2023.antflix.net#708.4_(C)" + } + ], + "url": "https://2023.antflix.net#708.4" + }, + { + "body": "Physical security shall be provided for critical operations power systems in accordance with 708.5(A) and (B). [708.5](https://2023.antflix.net#708.5)", + "displayTitle": "708.5 Physical Security", + "children": [ + { + "body": "Based on the results of the risk assessment, a strategy for providing physical security for critical operations power systems shall be developed, documented, and implemented. [708.5_(A)](https://2023.antflix.net#708.5_(A))", + "displayTitle": "(A) Risk Assessment", + "children": [], + "url": "https://2023.antflix.net#708.5_(A)" + }, + { + "body": "Electrical circuits and equipment for critical operations power systems shall be accessible to qualified personnel only. [708.5_(B)](https://2023.antflix.net#708.5_(B))", + "displayTitle": "(B) Restricted Access", + "children": [], + "url": "https://2023.antflix.net#708.5_(B)" + } + ], + "url": "https://2023.antflix.net#708.5" + }, + { + "displayTitle": "708.6 Testing and Maintenance", + "children": [ + { + "body": "The authority having jurisdiction shall conduct or witness a test of the complete system upon installation and periodically afterward. [708.6_(A)](https://2023.antflix.net#708.6_(A))", + "displayTitle": "(A) Conduct or Witness Test", + "children": [], + "url": "https://2023.antflix.net#708.6_(A)" + }, + { + "body": "Systems shall be tested periodically on a schedule approved by the authority having jurisdiction to ensure the systems are maintained in proper operating condition. [708.6_(B)](https://2023.antflix.net#708.6_(B))", + "displayTitle": "(B) Tested Periodically", + "children": [], + "url": "https://2023.antflix.net#708.6_(B)" + }, + { + "body": "The authority having jurisdiction shall require a documented preventive maintenance program for critical operations power systems. Informational Note: See NFPA 70B-2019, Recommended Practice for Electrical Equipment Maintenance, for information concerning maintenance. [708.6_(C)](https://2023.antflix.net#708.6_(C))", + "displayTitle": "(C) Maintenance", + "children": [], + "url": "https://2023.antflix.net#708.6_(C)" + }, + { + "body": "A written record shall be kept of such tests and maintenance. [708.6_(D)](https://2023.antflix.net#708.6_(D))", + "displayTitle": "(D) Written Record", + "children": [], + "url": "https://2023.antflix.net#708.6_(D)" + }, + { + "body": "Means for testing all critical power systems during maximum anticipated load conditions shall be provided. Informational Note: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, for information concerning testing and maintenance of emergency power supply systems (EPSSs) that are also applicable to COPS. [708.6_(E)](https://2023.antflix.net#708.6_(E))", + "displayTitle": "(E) Testing Under Load", + "children": [], + "url": "https://2023.antflix.net#708.6_(E)" + } + ], + "url": "https://2023.antflix.net#708.6" + }, + { + "body": "COPS that are connected to a communication network and have the capability to permit control of any portion of the premises COPS shall comply with either of the following: The ability to control the system is limited to a direct connection through a local nonnetworked interface.It is connected through a networked interface complying with one of the following methods:The system and associated software are identified as being evaluated for cybersecurity.A cybersecurity assessment is conducted on the connected system to determine vulnerabilities to cyberattacks.The cybersecurity assessment shall be conducted when the system configuration changes and at not more than 5-year intervals.Documentation of the evaluation, assessment, and certification shall be made available to those authorized to inspect, operate, and maintain the system.Informational Note No. 1: See ANSI/ISA 62443, Cybersecurity Standards series; UL 2900, Cybersecurity Standards series; or the NIST Framework for Improving Critical infrastructure Cybersecurity, Version 1.1, for assessment requirements.Informational Note No. 2: Examples of the commissioning certification used to demonstrate the system has been investigated for cybersecurity vulnerabilities could be one of the following:The ISA Security Compliance Institute (ISCI) conformity assessment programCertification of compliance by a nationally recognized test laboratoryManufacturer certification for the specific type and brand of system provided [708.7](https://2023.antflix.net#708.7)", + "displayTitle": "708.7 Cybersecurity", + "children": [], + "url": "https://2023.antflix.net#708.7" + }, + { + "displayTitle": "708.8 Commissioning", + "children": [ + { + "body": "A commissioning plan shall be developed and documented. Informational Note No. 1: See NFPA 70B-2019, Recommended Practice for Electrical Equipment Maintenance, for further information on developing a commissioning program. Informational Note No. 2: See 708.7 for cybersecurity assessments. [708.8_(A)](https://2023.antflix.net#708.8_(A))", + "displayTitle": "(A) Commissioning Plan", + "children": [], + "url": "https://2023.antflix.net#708.8_(A)" + }, + { + "body": "The installation of the equipment shall undergo component and system tests to ensure that, when energized, the system will function properly. [708.8_(B)](https://2023.antflix.net#708.8_(B))", + "displayTitle": "(B) Component and System Tests", + "children": [], + "url": "https://2023.antflix.net#708.8_(B)" + }, + { + "body": "A set of baseline test results shall be documented for comparison with future periodic maintenance testing to identify equipment deterioration. [708.8_(C)](https://2023.antflix.net#708.8_(C))", + "displayTitle": "(C) Baseline Test Results", + "children": [], + "url": "https://2023.antflix.net#708.8_(C)" + }, + { + "body": "A functional performance test program shall be established, documented, and executed upon complete installation of the critical system in order to establish a baseline reference for future performance requirements. Informational Note: See Informative Annex F, Availability and Reliability for Critical Operations Power Systems; and Development and Implementation of Functional Performance Tests (FPTs) for Critical Operations Power Systems, for more information on developing and implementing a functional performance test program. [708.8_(D)](https://2023.antflix.net#708.8_(D))", + "displayTitle": "(D) Functional Performance Tests", + "children": [], + "url": "https://2023.antflix.net#708.8_(D)" + } + ], + "url": "https://2023.antflix.net#708.8" + }, + { + "displayTitle": "Part II Circuit Wiring and Equipment", + "children": [], + "url": "https://2023.antflix.net#divider_112_II" + }, + { + "displayTitle": "708.10 Feeder and Branch Circuit Wiring", + "children": [ + { + "displayTitle": "(A) Identification", + "children": [ + { + "body": "In a building or at a structure where a critical operations power system and any other type of power system are present, all boxes and enclosures (including transfer switches, generators, and power panels) for critical operations power system circuits shall be permanently marked so they will be readily identified as a component of the critical operations power system. [708.10_(A)_(1)](https://2023.antflix.net#708.10_(A)_(1))", + "displayTitle": "(1) Boxes and Enclosures", + "children": [], + "url": "https://2023.antflix.net#708.10_(A)_(1)" + }, + { + "body": "In a building in which COPS are present with other types of power systems described in other sections in this article, the cover plates for the receptacles or the receptacles themselves supplied from the COPS shall have a distinctive color or marking so as to be readily identifiable. Nonlocking-type, 125-volt, 15- and 20-ampere receptacles supplied from the COPS shall have an illuminated face or an indicator light to indicate that there is power to the receptacle. Exception: If the COPS supplies power to a DCOA that is a stand-alone building, receptacle cover plates or the receptacles themselves shall not be required to have distinctive marking. [708.10_(A)_(2)](https://2023.antflix.net#708.10_(A)_(2))", + "displayTitle": "(2) Receptacle Identification", + "children": [], + "url": "https://2023.antflix.net#708.10_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#708.10_(A)" + }, + { + "body": "Wiring of two or more COPS circuits supplied from the same source shall be permitted in the same raceway, cable, box, or cabinet. In other than transfer equipment enclosures, wiring from a COPS source or COPS source distribution overcurrent protection to critical loads shall be kept entirely independent of all other wiring and equipment. [708.10_(B)](https://2023.antflix.net#708.10_(B))", + "displayTitle": "(B) Wiring", + "children": [], + "url": "https://2023.antflix.net#708.10_(B)" + }, + { + "body": "COPS feeders shall comply with 708.10(C)(1) through (C)(3). [708.10_(C)](https://2023.antflix.net#708.10_(C))", + "displayTitle": "(C) COPS Feeder Wiring Requirements", + "children": [ + { + "body": "The wiring of the COPS system shall be protected against physical damage. Only the following wiring methods shall be permitted: Rigid metal conduit, intermediate metal conduit, or Type Ml cable.Where encased in not less than 50 mm (2 in.) of concrete, any of the following wiring methods shall be permitted:Schedule 40 or Schedule 80 rigid polyvinyl chloride conduit (PVC)Reinforced thermosetting resin conduit (RTRC)Electrical metallic tubing (EMT)Flexible nonmetallic or jacketed metallic racewaysJacketed metallic cable assemblies listed for installation in concreteWhere provisions must be made for flexibility at equipment connection, one or more of the following shall also be permitted:Flexible metal fittingsFlexible metal conduit with listed fittingsLiquidtight flexible metal conduit with listed fittings [708.10_(C)_(1)](https://2023.antflix.net#708.10_(C)_(1))", + "displayTitle": "(1) Protection Against Physical Damage", + "children": [], + "url": "https://2023.antflix.net#708.10_(C)_(1)" + }, + { + "body": "Feeders shall meet one of the following conditions: The cable or raceway is protected by a listed electrical circuit protective system with a minimum 2-hour fire rating.Informational Note No. 1: See UL 1724, Fire Tests for Electrical Circuit Protective Systems, for one method of defining an electrical circuit protective system, by establishing a rating when tested. UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information to identify the system and its installation limitations to maintain a minimum 2-hour fire resistive rating.The cable or raceway is a listed fire-resistive cable system with a minimum 2-hour fire rating.Informational Note No. 2: See UL 2196-2017, Standard for Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for testing requirements for fire-resistive cables.Informational Note No. 3: The listing organization provides information for fire-resistive cable systems on proper installation requirements to maintain the fire rating.The cable or raceway is protected by a listed fire-rated assembly that has a minimum fire rating of 2 hours.The cable or raceway is encased in a minimum of 50 mm (2 in.) of concrete. [708.10_(C)_(2)](https://2023.antflix.net#708.10_(C)_(2))", + "displayTitle": "(2) Fire Protection for Feeders", + "children": [], + "url": "https://2023.antflix.net#708.10_(C)_(2)" + }, + { + "body": "Where COPS feeders are installed below the level of the 100-year floodplain, the insulated circuit conductors shall be listed for use in a wet location and be installed in a wiring method that is permitted for use in wet locations. [708.10_(C)_(3)](https://2023.antflix.net#708.10_(C)_(3))", + "displayTitle": "(3) Floodplain Protection", + "children": [], + "url": "https://2023.antflix.net#708.10_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#708.10_(C)" + }, + { + "body": "Outside the DCOA. COPS branch circuits installed outside the DCOA shall comply with the physical and fire protection requirements of 708.10(C)(1) through (C)(3).Within the DCOA. Any of the wiring methods recognized in Chapter 3 of this Code shall be permitted within the DCOA. [708.10_(D)](https://2023.antflix.net#708.10_(D))", + "displayTitle": "(D) COPS Branch Circuit Wiring", + "children": [], + "url": "https://2023.antflix.net#708.10_(D)" + } + ], + "url": "https://2023.antflix.net#708.10" + }, + { + "displayTitle": "708.11 Branch Circuit and Feeder Distribution Equipment", + "children": [ + { + "body": "COPS branch circuit distribution equipment shall be located within the same DCOA as the branch circuits it supplies. [708.11_(A)](https://2023.antflix.net#708.11_(A))", + "displayTitle": "(A) Branch Circuit Distribution Equipment", + "children": [], + "url": "https://2023.antflix.net#708.11_(A)" + }, + { + "body": "Equipment for COPS feeder circuits (including transfer equipment, transformers, and panelboards) shall comply with the following: Be located in spaces with a 2-hour fire resistance ratingBe located above the 100-year floodplain [708.11_(B)](https://2023.antflix.net#708.11_(B))", + "displayTitle": "(B) Feeder Distribution Equipment", + "children": [], + "url": "https://2023.antflix.net#708.11_(B)" + } + ], + "url": "https://2023.antflix.net#708.11" + }, + { + "body": "Feeders and branch circuits supplied by the COPS shall supply only equipment specified as required for critical operations use. [708.12](https://2023.antflix.net#708.12)", + "displayTitle": "708.12 Feeders and Branch Circuits Supplied by COPS", + "children": [], + "url": "https://2023.antflix.net#708.12" + }, + { + "body": "All conductors or cables shall be installed using any of the metal wiring methods permitted by 708.10(C)(1) and, in addition, shall comply with the following, as applicable: All cables for fire alarm, security, signaling systems, and emergency communications shall be shielded twisted pair cables or installed to comply with the performance requirements of the system.Shields of cables for fire alarm, security, signaling systems, and emergency communications shall be arranged in accordance with the manufacturer's published installation instructions.Optical fiber cables shall be used for connections between two or more buildings on the property and under single management.A listed primary protector shall be provided on all communications circuits. Listed secondary protectors shall be provided at the terminals of the communications circuits.Conductors for all control circuits rated above 50 volts shall be rated not less than 600 volts.Communications, fire alarm, and signaling circuits shall use relays with contact ratings that exceed circuit voltage and current ratings in the controlled circuit.All cables for fire alarm, security, emergency communications, and signaling systems shall be riser-rated and shall be part of a listed 2-hour fire-resistive cable system or protected by a listed 2-hour electrical circuit protective system.Control, monitoring, and power wiring to HVAC systems shall be part of a listed 2-hour fire-resistive cable system or protected by a listed 2-hour electrical circuit protective system. [708.14](https://2023.antflix.net#708.14)", + "displayTitle": "708.14 Wiring of HVAC, Fire Alarm, Security, Emergency Communications, and Signaling Systems", + "children": [], + "url": "https://2023.antflix.net#708.14" + }, + { + "displayTitle": "Part III Power Sources and Connection", + "children": [], + "url": "https://2023.antflix.net#divider_97_III" + }, + { + "displayTitle": "708.20 Sources of Power", + "children": [ + { + "body": "Current supply shall be such that, in the event of failure of the normal supply to the DCOA, critical operations power shall be available within the time required for the application. The supply system for critical operations power, in addition to the normal services to the building and meeting the general requirements of this section, shall be one or more of the types of systems described in 708.20(E) through (H). Informational Note No. 1: Assignment of degree of reliability of the recognized critical operations power system depends on the careful evaluation in accordance with the risk assessment. Informational Note No. 2: See IEEE 3006.5\u20142014, Recommended Practice for the Use of Probability Methods for Conducting a Reliability Analysis of Industrial and Commercial Power Systems, for guidance about determining degree of reliability. [708.20_(A)](https://2023.antflix.net#708.20_(A))", + "displayTitle": "(A) General Requirements", + "children": [], + "url": "https://2023.antflix.net#708.20_(A)" + }, + { + "body": "Where located within a building, equipment for sources of power as described in 708.20(E) through (H) shall be installed either in spaces fully protected by an approved automatic fire protection system or in spaces with a 2-hour fire rating. [708.20_(B)](https://2023.antflix.net#708.20_(B))", + "displayTitle": "(B) Fire Protection", + "children": [], + "url": "https://2023.antflix.net#708.20_(B)" + }, + { + "body": "All sources of power shall be grounded as a separately derived source in accordance with 250.30. Exception: Where installed in accordance with 708.10(C) and 708.11(B), equipment containing the main bonding jumper or system bonding jumper for the normal source and the feeder wiring to the transfer equipment shall not be required to be grounded as a separately derived source. [708.20_(C)](https://2023.antflix.net#708.20_(C))", + "displayTitle": "(C) Grounding", + "children": [], + "url": "https://2023.antflix.net#708.20_(C)" + }, + { + "body": "Surge protection devices shall be provided at all facility distribution voltage levels. [708.20_(D)](https://2023.antflix.net#708.20_(D))", + "displayTitle": "(D) Surge Protection Devices", + "children": [], + "url": "https://2023.antflix.net#708.20_(D)" + }, + { + "body": "An automatic battery charging means shall be provided. Batteries shall be compatible with the charger for that particular installation. Automotive-type batteries shall not be used. [708.20_(E)](https://2023.antflix.net#708.20_(E))", + "displayTitle": "(E) Storage Battery", + "children": [], + "url": "https://2023.antflix.net#708.20_(E)" + }, + { + "displayTitle": "(F) Generator Set", + "children": [ + { + "body": "Generator sets driven by a prime mover shall be provided with means for automatically starting the prime mover on failure of the normal power source. A time-delay feature permitting a minimum 15-minute setting shall be provided to avoid retransfer in case of short-time reestablishment of the normal source. [708.20_(F)_(1)](https://2023.antflix.net#708.20_(F)_(1))", + "displayTitle": "(1) Prime Mover-Driven", + "children": [], + "url": "https://2023.antflix.net#708.20_(F)_(1)" + }, + { + "body": "Where power is needed for the operation of the fuel transfer pumps to deliver fuel to a generator set day tank, this pump shall be connected to the COPS. [708.20_(F)_(2)](https://2023.antflix.net#708.20_(F)_(2))", + "displayTitle": "(2) Power for Fuel Transfer Pumps", + "children": [], + "url": "https://2023.antflix.net#708.20_(F)_(2)" + }, + { + "body": "Prime movers shall not be solely dependent on a public utility gas system for their fuel supply or municipal water supply for their cooling systems. Means shall be provided for automatically transferring from one fuel supply to another where dual fuel supplies are used. [708.20_(F)_(3)](https://2023.antflix.net#708.20_(F)_(3))", + "displayTitle": "(3) Dual Supplies", + "children": [], + "url": "https://2023.antflix.net#708.20_(F)_(3)" + }, + { + "body": "Where a storage battery is used for control or signal power or as the means of starting the prime mover, it shall be suitable for the purpose and shall be equipped with an automatic charging means independent of the generator set. Where the battery charger is required for the operation of the generator set, it shall be connected to the COPS. Where power is required for the operation of dampers used to ventilate the generator set, the dampers shall be connected to the COPS. [708.20_(F)_(4)](https://2023.antflix.net#708.20_(F)_(4))", + "displayTitle": "(4) Battery Power and Dampers", + "children": [], + "url": "https://2023.antflix.net#708.20_(F)_(4)" + }, + { + "body": "Permanently Installed Generators and Portable Generators Greater Than 15 kW. Where an outdoor housed generator set is equipped with a readily accessible disconnecting means in accordance with 445.18, and the disconnecting means is located within sight of the building or structure supplied, an additional disconnecting means shall not be required where ungrounded conductors serve or pass through the building or structure. Where the generator supply conductors terminate at a disconnecting means in or on a building or structure, the disconnecting means shall meet the requirements of 225.36.Portable Generators 15 kW or Less. Where a portable generator, rated 15 kW or less, is installed using a flanged inlet or other cord-and plug-type connection, a disconnecting means shall not be required where ungrounded conductors serve or pass through a building or structure. [708.20_(F)_(5)](https://2023.antflix.net#708.20_(F)_(5))", + "displayTitle": "(5) Outdoor Generator Sets", + "children": [], + "url": "https://2023.antflix.net#708.20_(F)_(5)" + }, + { + "body": "Where the COPS is supplied by a single generator, a means to connect a portable or vehicle-mounted generator shall be provided. [708.20_(F)_(6)](https://2023.antflix.net#708.20_(F)_(6))", + "displayTitle": "(6) Means for Connecting Portable or Vehicle-Mounted Generator", + "children": [], + "url": "https://2023.antflix.net#708.20_(F)_(6)" + }, + { + "body": "Where internal combustion engines are used as the prime mover, an on-site fuel supply shall be provided. The on-site fuel supply shall be secured and protected in accordance with the risk assessment. [708.20_(F)_(7)](https://2023.antflix.net#708.20_(F)_(7))", + "displayTitle": "(7) On-Site Fuel Supply", + "children": [], + "url": "https://2023.antflix.net#708.20_(F)_(7)" + } + ], + "url": "https://2023.antflix.net#708.20_(F)" + }, + { + "body": "Uninterruptible power supplies used as the sole source of power for COPS shall comply with 708.20(E) and (F). [708.20_(G)](https://2023.antflix.net#708.20_(G))", + "displayTitle": "(G) Uninterruptible Power Supplies", + "children": [], + "url": "https://2023.antflix.net#708.20_(G)" + }, + { + "body": "Installation of a fuel cell system shall meet the requirements of Parts II through VIII of Article 692. [708.20_(H)](https://2023.antflix.net#708.20_(H))", + "displayTitle": "(H) Fuel Cell System", + "children": [], + "url": "https://2023.antflix.net#708.20_(H)" + } + ], + "url": "https://2023.antflix.net#708.20" + }, + { + "body": "Adequate ventilation shall be provided for the alternate power source for continued operation under maximum anticipated ambient temperatures. Informational Note: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, and NFPA 111-2019, Standard on Stored Electrical Energy Emergency and Standby Power Systems, for additional information on ventilation air for combustion and cooling. [708.21](https://2023.antflix.net#708.21)", + "displayTitle": "708.21 Ventilation", + "children": [], + "url": "https://2023.antflix.net#708.21" + }, + { + "displayTitle": "708.22 Capacity of Power Sources", + "children": [ + { + "body": "A COPS shall have capacity and rating for all loads to be operated simultaneously for continuous operation with variable load for an unlimited number of hours, except for required maintenance of the power source. A portable, temporary, or redundant alternate power source shall be available for use whenever the COPS power source is out of service for maintenance or repair. [708.22_(A)](https://2023.antflix.net#708.22_(A))", + "displayTitle": "(A) Capacity and Rating", + "children": [], + "url": "https://2023.antflix.net#708.22_(A)" + }, + { + "body": "The alternate power source shall be permitted to supply COPS emergency, legally required standby, and optional loads where the source has adequate capacity or where load management (that includes automatic selective load pickup and load shedding) is provided as needed to ensure adequate power to (1) the COPS and emergency circuits, (2) the legally required standby circuits, and (3) the optional standby circuits, in that order of priority. The alternate power source shall be permitted to be used for peak load shaving, provided these conditions are met. Peak load-shaving operation shall be permitted for satisfying the test requirement of 708.6(B), provided all other conditions of 708.6 are met. [708.22_(B)](https://2023.antflix.net#708.22_(B))", + "displayTitle": "(B) Selective Load Management", + "children": [], + "url": "https://2023.antflix.net#708.22_(B)" + }, + { + "body": "The alternate power source shall be capable of operating the COPS for a minimum of 72 hours at full load of DCOA with a steady-state voltage within \u00b110 percent of nominal utilization voltage. [708.22_(C)](https://2023.antflix.net#708.22_(C))", + "displayTitle": "(C) Duration of COPS Operation", + "children": [], + "url": "https://2023.antflix.net#708.22_(C)" + } + ], + "url": "https://2023.antflix.net#708.22" + }, + { + "displayTitle": "708.24 Transfer Equipment", + "children": [ + { + "body": "Transfer equipment, including automatic transfer switches, shall be automatic, listed, and identified for emergency use. Transfer equipment shall be designed and installed to prevent the inadvertent interconnection of normal and critical operations sources of supply in any operation of the transfer equipment. Transfer equipment and electric power production systems installed to permit operation in parallel with the normal source shall meet the requirements of Parts I and II of Article 705. [708.24_(A)](https://2023.antflix.net#708.24_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#708.24_(A)" + }, + { + "body": "Means shall be permitted to bypass and isolate the transfer equipment. If bypass isolation transfer switches are used, inadvertent parallel operation shall be avoided. [708.24_(B)](https://2023.antflix.net#708.24_(B))", + "displayTitle": "(B) Bypass Isolation Transfer Switches", + "children": [], + "url": "https://2023.antflix.net#708.24_(B)" + }, + { + "body": "If used with sources that are not inherently synchronized, automatic transfer switches shall comply with the following: Automatic transfer switches shall be listed for emergency use.Automatic transfer switches shall be electrically operated and mechanically held. [708.24_(C)](https://2023.antflix.net#708.24_(C))", + "displayTitle": "(C) Automatic Transfer Switches", + "children": [], + "url": "https://2023.antflix.net#708.24_(C)" + }, + { + "body": "If COPS loads are supplied by a single feeder, the COPS shall include redundant transfer equipment or a bypass isolation transfer switch to facilitate maintenance as required in 708.6(C) without jeopardizing continuity of power. If the redundant transfer equipment or bypass isolation transfer switch is manual (or nonautomatic), then it shall be actively supervised by a qualified person when the primary (automatic) transfer equipment is disabled for maintenance or repair. [708.24_(D)](https://2023.antflix.net#708.24_(D))", + "displayTitle": "(D) Redundant Transfer Equipment", + "children": [], + "url": "https://2023.antflix.net#708.24_(D)" + }, + { + "body": "Transfer equipment shall supply only COPS loads. [708.24_(E)](https://2023.antflix.net#708.24_(E))", + "displayTitle": "(E) Use", + "children": [], + "url": "https://2023.antflix.net#708.24_(E)" + }, + { + "body": "The short-circuit current rating of the transfer equipment, based on the specific overcurrent protective device type and settings protecting the transfer equipment, shall be field marked on the exterior of the transfer equipment. [708.24_(F)](https://2023.antflix.net#708.24_(F))", + "displayTitle": "(F) Documentation", + "children": [], + "url": "https://2023.antflix.net#708.24_(F)" + } + ], + "url": "https://2023.antflix.net#708.24" + }, + { + "body": "Branch circuits supplied by the COPS shall only supply equipment specified as required for critical operations use. [708.30](https://2023.antflix.net#708.30)", + "displayTitle": "708.30 Branch Circuits Supplied by COPS", + "children": [], + "url": "https://2023.antflix.net#708.30" + }, + { + "displayTitle": "Part IV Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#divider_41_IV" + }, + { + "body": "The feeder- and branch-circuit overcurrent devices shall be accessible to authorized persons only. [708.50](https://2023.antflix.net#708.50)", + "displayTitle": "708.50 Accessibility", + "children": [], + "url": "https://2023.antflix.net#708.50" + }, + { + "displayTitle": "708.52 Ground-Fault Protection of Equipment", + "children": [ + { + "body": "The requirements of 708.52 shall apply to critical operations (including multiple occupancy buildings) with critical operation areas. [708.52_(A)](https://2023.antflix.net#708.52_(A))", + "displayTitle": "(A) Applicability", + "children": [], + "url": "https://2023.antflix.net#708.52_(A)" + }, + { + "body": "Where ground-fault protection is provided for operation of the service disconnecting means or feeder disconnecting means as specified by 230.95 or 215.10, an additional step of ground-fault protection shall be provided in all next level feeder disconnecting means downstream toward the load. Such protection shall consist of overcurrent devices and current transformers or other equivalent protective equipment that causes the feeder disconnecting means to open. [708.52_(B)](https://2023.antflix.net#708.52_(B))", + "displayTitle": "(B) Feeders", + "children": [], + "url": "https://2023.antflix.net#708.52_(B)" + }, + { + "body": "When equipment ground-fault protection is first installed, each level shall be tested to ensure that ground-fault protection is operational. Informational Note: Testing is intended to verify the ground-fault function is operational. The performance test is not intended to verify selectivity in 708.52(D), as this is often coordinated similarly to circuit breakers by reviewing time and current curves and properly setting the equipment. (Selectivity of fuses and circuit breakers is not performance tested for overload and short circuit.) [708.52_(C)](https://2023.antflix.net#708.52_(C))", + "displayTitle": "(C) Testing", + "children": [], + "url": "https://2023.antflix.net#708.52_(C)" + }, + { + "body": "Ground-fault protection for operation of the service and feeder disconnecting means shall be fully selective such that the feeder device, but not the service device, shall open on ground faults on the load side of the feeder device. Separation of ground-fault protection time-current characteristics shall conform to the manufacturer's recommendations and shall consider all required tolerances and disconnect operating time to achieve 100 percent selectivity. Informational Note: See 230.95, Informational Note No. 4, for transfer of alternate source where ground-fault protection is applied. [708.52_(D)](https://2023.antflix.net#708.52_(D))", + "displayTitle": "(D) Selectivity", + "children": [], + "url": "https://2023.antflix.net#708.52_(D)" + } + ], + "url": "https://2023.antflix.net#708.52" + }, + { + "displayTitle": "708.54 Selective Coordination", + "children": [ + { + "body": "Critical operations power system(s) overcurrent protective devices (OCPDs) shall be selectively coordinated with all supply-side and load-side OCPDs. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. [708.54_(A)](https://2023.antflix.net#708.54_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#708.54_(A)" + }, + { + "body": "Where critical operations power system(s) OCPDs are replaced, they shall be reevaluated to ensure selective coordination is maintained with all supply-side and load-side OCPDs. [708.54_(B)](https://2023.antflix.net#708.54_(B))", + "displayTitle": "(B) Replacements", + "children": [], + "url": "https://2023.antflix.net#708.54_(B)" + }, + { + "body": "If modifications, additions, or deletions to the critical operations power system(s) occur, selective coordination of the critical operations power system(s) OCPDs with all supply-side and load-side OCPDs shall be reevaluated. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. Informational Note: See Informational Note Figure 708.54(C) for an example of how critical operations power system OCPDs selectively coordinate with all supply-side OCPDs. OCPD D selectively coordinates with OCPDs C, F, E, B, and A. OCPD C selectively coordinates with OCPDs F, E, B, and A. OCPD F selectively coordinates with OCPD E. OCPD B is not required to selectively coordinate with OCPD A because OCPD B is not a critical operations power system OCPD. Informational Note Figure 708.54(C) Critical Operations Power System Selective Coordination. [708.54_(C)](https://2023.antflix.net#708.54_(C))", + "displayTitle": "(C) Modifications", + "children": [], + "url": "https://2023.antflix.net#708.54_(C)" + } + ], + "url": "https://2023.antflix.net#708.54" + }, + { + "displayTitle": "Part V System Performance and Analysis", + "children": [], + "url": "https://2023.antflix.net#divider_29_V" + }, + { + "body": "A facility with a COPS shall have a documented emergency operations plan. The plan shall consider emergency operations and response, recovery, and continuity of operations. Informational Note: See NFPA 1600-2019, Standard on Continuity, Emergency, and Crisis Management, Section 5.7, which provides guidance for the development and implementation of emergency plans. [708.64](https://2023.antflix.net#708.64)", + "displayTitle": "708.64 Emergency Operations Plan", + "children": [], + "url": "https://2023.antflix.net#708.64" + } + ], + "url": "https://2023.antflix.net#708" + }, + { + "displayTitle": "Article 710 Stand-Alone Systems", + "children": [ + { + "body": "This article covers electric power production systems that operate in island mode not connected to an electric utility or other electric power production and distribution network. Informational Note: These systems operate independently from an electric utility and include isolated microgrid systems. Standalone systems often include a single or a compatible interconnection of sources such as engine generators, solar PV, wind, ESS, or batteries. [710.1](https://2023.antflix.net#710.1)", + "displayTitle": "710.1 Scope", + "children": [], + "url": "https://2023.antflix.net#710.1" + }, + { + "body": "All power production equipment or systems shall be approved for use in island mode and comply with one of the following: Be listedBe evaluated for the application and have a field label applied [710.6](https://2023.antflix.net#710.6)", + "displayTitle": "710.6 Equipment Approval", + "children": [], + "url": "https://2023.antflix.net#710.6" + }, + { + "body": "A permanent plaque, label, or directory shall be installed at a building supplied by a stand-alone system at the power source disconnecting means location, or at an approved readily visible location. The plaque, label, or directory shall denote the location of each power source disconnecting means for the building or be grouped with other plaques or directories for other on-site sources. Where multiple sources supply the building, markings shall comply with 705.10. [710.10](https://2023.antflix.net#710.10)", + "displayTitle": "710.10 Identification of Power Sources", + "children": [], + "url": "https://2023.antflix.net#710.10" + }, + { + "body": "The maximum current shall be the stand-alone continuous inverter input current rating when the inverter is producing rated power at the lowest input voltage. [710.12](https://2023.antflix.net#710.12)", + "displayTitle": "710.12 Stand-Alone Inverter Input Circuit Current", + "children": [], + "url": "https://2023.antflix.net#710.12" + }, + { + "body": "Premises wiring systems shall be adequate to meet the requirements of this Code for similar installations supplied by a feeder or service. The wiring on the supply side of the building or structure disconnecting means shall comply with the requirements of this Code, except as modified by 710.15(A) through (G). [710.15](https://2023.antflix.net#710.15)", + "displayTitle": "710.15 General", + "children": [ + { + "body": "Power supply to premises wiring systems fed by stand-alone or isolated microgrid power sources shall be permitted to have less capacity than the calculated load. The capacity of the sum of all sources of the stand-alone supply shall be equal to or greater than the load posed by the largest single utilization equipment connected to the system. Calculated general lighting loads shall not be considered as a single load. Informational Note: For general-use loads the system capacity can be calculated using the sum of the capacity of the firm sources, such as generators and ESS inverters. For specialty loads intended to be powered directly from a variable source, the capacity can be calculated using the sum of the variable sources, such as PV or wind inverters, or the combined capacity of both firm and variable sources. [710.15_(A)](https://2023.antflix.net#710.15_(A))", + "displayTitle": "(A) Supply Output", + "children": [], + "url": "https://2023.antflix.net#710.15_(A)" + }, + { + "body": "The circuit conductors between a stand-alone source and a building or structure disconnecting means shall be sized based on the sum of the output ratings of the stand-alone source(s). For three-phase interconnections, the phase loads shall be controlled or balanced to be compatible with specifications of the sum of the power supply capacities. [710.15_(B)](https://2023.antflix.net#710.15_(B))", + "displayTitle": "(B) Sizing and Protection", + "children": [], + "url": "https://2023.antflix.net#710.15_(B)" + }, + { + "body": "Stand-alone and isolated microgrid systems shall be permitted to supply 120 volts to single-phase, 3-wire, 120/240-volt service equipment or distribution panels where there are no 240-volt outlets and where there are no multiwire branch circuits. In all installations, the sum of the ratings of the power sources shall be less than the rating of the neutral bus in the service equipment. This equipment shall be marked with the following words or equivalent: WARNING:SINGLE 120-VOLT SUPPLY. DO NOT CONNECT MULTI-WIRE BRANCH CIRCUITS! The warning sign(s) or label(s) shall comply with 110.21(B). [710.15_(C)](https://2023.antflix.net#710.15_(C))", + "displayTitle": "(C) Single 120-Volt Supply", + "children": [], + "url": "https://2023.antflix.net#710.15_(C)" + }, + { + "body": "Stand-alone and microgrid systems shall be permitted to supply three-phase, 3-wire or 4-wire systems. [710.15_(D)](https://2023.antflix.net#710.15_(D))", + "displayTitle": "(D) Three-Phase Supply", + "children": [], + "url": "https://2023.antflix.net#710.15_(D)" + }, + { + "body": "Energy storage or backup power supplies shall not be required. [710.15_(E)](https://2023.antflix.net#710.15_(E))", + "displayTitle": "(E) Energy Storage or Backup Power System Requirements", + "children": [], + "url": "https://2023.antflix.net#710.15_(E)" + }, + { + "body": "The stand-alone power sources shall be controlled during operation so that voltage and frequency are supplied within limits compatible with the connected loads. [710.15_(F)](https://2023.antflix.net#710.15_(F))", + "displayTitle": "(F) Voltage and Frequency Control", + "children": [], + "url": "https://2023.antflix.net#710.15_(F)" + } + ], + "url": "https://2023.antflix.net#710.15" + } + ], + "url": "https://2023.antflix.net#710" + }, + { + "displayTitle": "Article 722 Cables for Power-Limited Circuits and Fault-Managed Power Circuits", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_113_I" + }, + { + "body": "This article covers the general requirements for the installation of single- and multiple-conductor cables used in Class 2 and Class 3 power-limited circuits, power-limited fire alarm (PLFA) circuits, and Class 4 fault-managed power circuits. [722.1](https://2023.antflix.net#722.1)", + "displayTitle": "722.1 Scope", + "children": [], + "url": "https://2023.antflix.net#722.1" + }, + { + "body": "In addition to the requirements of this article, installation of cables shall comply with the articles or sections listed in 722.3(A) through (O). Only those sections of Article 300 referenced in this article shall apply. [722.3](https://2023.antflix.net#722.3)", + "displayTitle": "722.3 Other Articles", + "children": [ + { + "body": "The number and size of conductors and cables, as well as raceway sizing, shall comply with 300.17. [722.3_(A)](https://2023.antflix.net#722.3_(A))", + "displayTitle": "(A) Installation of Cables and Conductors in Raceway", + "children": [], + "url": "https://2023.antflix.net#722.3_(A)" + }, + { + "body": "Installation of power-limited circuits shall comply with 300.21. [722.3_(B)](https://2023.antflix.net#722.3_(B))", + "displayTitle": "(B) Spread of Fire or Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#722.3_(B)" + }, + { + "body": "Power-limited circuits installed in ducts, plenums, or other space used for environmental air shall comply with 300.22. Exception No. 1: Cables selected in accordance with Table 722.135(B) and installed in accordance with 300.22(B), Exception shall be permitted to be installed in ducts specifically fabricated for environmental air. Exception No. 2: Cables selected in accordance with Table 722.135(B) shall be permitted to be installed in other spaces used for environmental air (plenums). [722.3_(C)](https://2023.antflix.net#722.3_(C))", + "displayTitle": "(C) Ducts, Plenums, and Other Air-Handling Spaces", + "children": [], + "url": "https://2023.antflix.net#722.3_(C)" + }, + { + "body": "Section 300.22(A) for wiring systems shall apply. Exception: Nonconductive optical fiber cables shall be permitted in ducts used for dust, loose stock, or vapor removal. [722.3_(D)](https://2023.antflix.net#722.3_(D))", + "displayTitle": "(D) Cables in Ducts for Dust, Loose Stock, or Vapor Removal", + "children": [], + "url": "https://2023.antflix.net#722.3_(D)" + }, + { + "body": "Cable tray installations shall comply with Parts I and II of Article 392. [722.3_(E)](https://2023.antflix.net#722.3_(E))", + "displayTitle": "(E) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#722.3_(E)" + }, + { + "body": "Circuits wired using instrumentation tray cable shall comply with 335.1 and 335.4 through 335.9. [722.3_(F)](https://2023.antflix.net#722.3_(F))", + "displayTitle": "(F) Instrumentation Tray Cable", + "children": [], + "url": "https://2023.antflix.net#722.3_(F)" + }, + { + "body": "Section 300.7(A) shall apply. [722.3_(G)](https://2023.antflix.net#722.3_(G))", + "displayTitle": "(G) Raceways or Sleeves Exposed to Different Temperatures", + "children": [], + "url": "https://2023.antflix.net#722.3_(G)" + }, + { + "body": "Vertical installations of circuit integrity (CI) cables and conductors installed in a raceway or conductors and cables of electrical circuit protective systems and fire resistive-cable systems shall be installed in accordance with 300.19. [722.3_(H)](https://2023.antflix.net#722.3_(H))", + "displayTitle": "(H) Vertical Support for Fire-Resistive Cables and Conductors", + "children": [], + "url": "https://2023.antflix.net#722.3_(H)" + }, + { + "body": "Section 300.8 shall apply. [722.3_(I)](https://2023.antflix.net#722.3_(I))", + "displayTitle": "(I) Installation of Cables With Other Systems", + "children": [], + "url": "https://2023.antflix.net#722.3_(I)" + }, + { + "body": "The installation of power-limited cables shall comply with the applicable requirements in 110.11, 300.5(B), 300.6, 300.9, and 310.10(F) when installed in corrosive, damp, or wet locations. [722.3_(J)](https://2023.antflix.net#722.3_(J))", + "displayTitle": "(J) Corrosive, Damp, or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#722.3_(J)" + }, + { + "body": "Cables installed in cable routing assemblies shall be selected in accordance with Table 800.154(c), listed in accordance with 800.182, and installed in accordance with 800.110(C)(1)), 800.110(C)(2), and 800.113. [722.3_(K)](https://2023.antflix.net#722.3_(K))", + "displayTitle": "(K) Cable Routing Assemblies", + "children": [], + "url": "https://2023.antflix.net#722.3_(K)" + }, + { + "body": "Cables communications raceways shall be selected in accordance with Table 800.154(b), listed in accordance with 800.182, and installed in accordance with 800.113 and 362.24 through 362.56, where the requirements applicable to electrical nonmetallic tubing (ENT) apply. [722.3_(L)](https://2023.antflix.net#722.3_(L))", + "displayTitle": "(L) Communications Raceways", + "children": [], + "url": "https://2023.antflix.net#722.3_(L)" + }, + { + "body": "The requirements of 310.14(A)(3) on the temperature limitation of conductors shall apply to power-limited circuit cables and fault-managed power cables. [722.3_(M)](https://2023.antflix.net#722.3_(M))", + "displayTitle": "(M) Temperature Limitation of Cables", + "children": [], + "url": "https://2023.antflix.net#722.3_(M)" + }, + { + "body": "Equipment grounding conductors shall be identified in accordance with 250.119. Exception: Cables that do not contain an equipment grounding conductor shall be permitted to use a conductor with green insulation, or green insulation with one or more yellow stripes, for other than equipment grounding purposes. [722.3_(N)](https://2023.antflix.net#722.3_(N))", + "displayTitle": "(N) Identification of Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#722.3_(N)" + }, + { + "body": "As appropriate, the installation of wires and cables shall also comply with the following: Class 2 and Class 3 cables - Part II of Article 725Class 4 cables - Part IV of Article 726Fire alarm cables - Part III of Article 760Optical fiber cables - Part V of Article 770 [722.3_(O)](https://2023.antflix.net#722.3_(O))", + "displayTitle": "(O) Specific Requirements", + "children": [], + "url": "https://2023.antflix.net#722.3_(O)" + } + ], + "url": "https://2023.antflix.net#722.3" + }, + { + "body": "Class 4 cables shall be permitted to be used in hazardous (classified) locations where specifically permitted by other articles of this Code. [722.10](https://2023.antflix.net#722.10)", + "displayTitle": "722.10 Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#722.10" + }, + { + "body": "Class 4 cables shall not be permitted for any applications that are not part of a Class 4 system. Exception: Use of Class 4 cable for other applications shall be permitted if the cable has been listed as suitable for the other applications. [722.12](https://2023.antflix.net#722.12)", + "displayTitle": "722.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#722.12" + }, + { + "body": "Access to electrical equipment shall not be denied by an accumulation of cables that prevents removal of panels, including suspended ceiling panels. [722.21](https://2023.antflix.net#722.21)", + "displayTitle": "722.21 Access to Electrical Equipment Behind Panels Designed to Allow Access", + "children": [], + "url": "https://2023.antflix.net#722.21" + }, + { + "displayTitle": "722.24 Mechanical Execution of Work", + "children": [ + { + "body": "Cables shall be installed in a neat and workmanlike manner. Cables installed exposed on the surface of ceilings and sidewalls shall be supported by the building structure in such a manner that the cable will not be damaged by normal building use. Such cables shall be secured by hardware, including straps, staples, hangers, listed cable ties identified for securement and support, or similar fittings, designed and installed so as not to damage the cable. The installation shall conform to 300.4 and 300.11. A bushing shall be installed where cables emerge from raceway used for mechanical support or protection in accordance with 300.15(C). Nonmetallic cable ties and other nonmetallic cable accessories used to secure and support cables in other spaces used for environmental air (plenums) shall be listed as having low smoke and heat release properties in accordance with 300.22(C). Informational Note No. 1: See NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, for discrete combustible components. Informational Note No. 2: Paint, plaster, cleaners, abrasives, corrosive residues, or other contaminants could result in an undetermined alteration of cable properties. [722.24_(A)](https://2023.antflix.net#722.24_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#722.24_(A)" + }, + { + "body": "Cables shall not be strapped, taped, or attached by any means to the exterior of any conduit or other raceway as a means of support. Exception No. 1: Class 2 circuit conductors or cables shall be permitted to be installed as permitted by 300.11(C)(2). Exception No. 2: Overhead (aerial) spans of optical fiber cables shall be permitted to be attached to the exterior of a raceway-type mast intended for the attachment and support of such cables. [722.24_(B)](https://2023.antflix.net#722.24_(B))", + "displayTitle": "(B) Support of Cables", + "children": [], + "url": "https://2023.antflix.net#722.24_(B)" + }, + { + "body": "Circuit integrity (CI) cable shall be supported at a distance not exceeding 610 mm (24 in.). Cable shall be secured to the noncombustible surface of the building structure. Cable supports and fasteners shall be steel. [722.24_(C)](https://2023.antflix.net#722.24_(C))", + "displayTitle": "(C) Circuit Integrity (CI) Cable", + "children": [], + "url": "https://2023.antflix.net#722.24_(C)" + } + ], + "url": "https://2023.antflix.net#722.24" + }, + { + "body": "The accessible portion of abandoned cables shall be removed. Where cables are identified for future use with a tag, the tag shall be of sufficient durability to withstand the environment involved. [722.25](https://2023.antflix.net#722.25)", + "displayTitle": "722.25 Abandoned Cables", + "children": [], + "url": "https://2023.antflix.net#722.25" + }, + { + "body": "Where damage to power-limited circuits can result in a failure of safety-control equipment that would introduce a direct fire or life hazard, the power limited circuits shall be installed using Class 1 circuit wiring methods in accordance with 724.46. All conductors of such circuits shall be installed in rigid metal conduit, intermediate metal conduit, rigid nonmetallic conduit, electrical metallic tubing, Type MI cable, or Type MC cable, or be otherwise suitably protected from physical damage. [722.31](https://2023.antflix.net#722.31)", + "displayTitle": "722.31 Safety-Control Equipment", + "children": [], + "url": "https://2023.antflix.net#722.31" + }, + { + "body": "The installation of cables shall comply with 722.135(A) through (I), as applicable. [722.135](https://2023.antflix.net#722.135)", + "displayTitle": "722.135 Installation of Cables", + "children": [ + { + "body": "Cables installed in buildings shall be listed. [722.135_(A)](https://2023.antflix.net#722.135_(A))", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#722.135_(A)" + }, + { + "body": "The installation of cables shall comply with Table 722.135(B). Informational Note No. 1: See NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, 4.3.4 and 4.3.11.3.3, for information on fire protection of wiring installed in ducts specifically fabricated for environmental air and other spaces used for environmental air (plenums). Informational Note No. 2: See 300.21 for firestop requirements for floor penetrations. Informational Note No. 3: See Chapter 3 for the installation requirements for PLTC cables installed outdoors in cable trays. Informational Note No. 4: See UL 2024, Cable Routing Assemblies and Communications Raceways, for applicable requirements for plenum, riser, and general-purpose cable routing assemblies and raceways. [722.135_(B)](https://2023.antflix.net#722.135_(B))", + "displayTitle": "(B) Cables in Buildings", + "children": [], + "url": "https://2023.antflix.net#722.135_(B)" + }, + { + "body": "In industrial establishments where the conditions of maintenance and supervision ensure that only qualified persons service the installation, Type PLTC cable shall be permitted in accordance with either of the following: Where the cable is not subject to physical damage, Type PLTC cable that complies with the crush and impact requirements of Type MC cable and is identified as Type PITC-ER for such use shall be permitted to be exposed between the cable tray and the utilization equipment or device. The cable shall be continuously supported and protected against physical damage using mechanical protection such as dedicated struts, angles, or channels. The cable shall be supported and secured at intervals not exceeding 1.8 m (6 ft). Where not subject to physical damage, Type PLTC-ER cable shall be permitted to transition between cable trays and between cable trays and utilization equipment or devices for a distance not to exceed 1.8 m (6 ft) without continuous support. The cable shall be mechanically supported where exiting the cable tray to ensure that the minimum bending radius is not exceeded.Type PLTC cable, with a metallic sheath or armor in accordance with 722.179(A)(6), shall be permitted to be installed exposed. The cable shall be continuously supported and protected against physical damage using mechanical protection such as dedicated struts, angles, or channels. The cable shall be secured at intervals not exceeding 1.8 m (6 ft). [722.135_(C)](https://2023.antflix.net#722.135_(C))", + "displayTitle": "(C) Industrial Establishments", + "children": [], + "url": "https://2023.antflix.net#722.135_(C)" + }, + { + "body": "In hoistways, cables shall be installed in rigid metal conduit, rigid nonmetallic conduit, intermediate metal conduit, liquidtight flexible nonmetallic conduit, or electrical metallic tubing. For elevators or similar equipment, these conductors shall be permitted to be installed as provided in 620.21. [722.135_(D)](https://2023.antflix.net#722.135_(D))", + "displayTitle": "(D) In Hoistways", + "children": [], + "url": "https://2023.antflix.net#722.135_(D)" + }, + { + "body": "The substitutions for cables listed in Table 722.135(E) shall be permitted. Where substitute cables are installed, the installation requirements of the articles described in 722.3(0) shall also apply. CI cables shall be permitted to be installed to provide 2-hour circuit integrity. See 722.135(F). Informational Note: See 800.179 for information on Types CMP, CMR, CM, and CMX. [722.135_(E)](https://2023.antflix.net#722.135_(E))", + "displayTitle": "(E) Cable Substitutions", + "children": [], + "url": "https://2023.antflix.net#722.135_(E)" + }, + { + "body": "CI cable, a fire-resistive cable system, or a listed electrical circuit protective system shall be permitted for use in systems that supply critical circuits to ensure survivability for continued circuit operation for a specified time under fire conditions. [722.135_(F)](https://2023.antflix.net#722.135_(F))", + "displayTitle": "(F) Circuit Integrity (CI) Cable, Fire-Resistive Cable System, or Electrical Circuit Protective System", + "children": [], + "url": "https://2023.antflix.net#722.135_(F)" + }, + { + "body": "Conductors in Type PLTC cables used for Class 2 thermocouple circuits shall be permitted to be any of the materials used for thermocouple extension wire. [722.135_(G)](https://2023.antflix.net#722.135_(G))", + "displayTitle": "(G) Thermocouple Circuits", + "children": [], + "url": "https://2023.antflix.net#722.135_(G)" + }, + { + "body": "Where 4-pair cables are used to transmit power and data to a powered device, 725.144 shall apply. [722.135_(H)](https://2023.antflix.net#722.135_(H))", + "displayTitle": "(H) Bundling of 4-Pair Cables Transmitting Power and Data", + "children": [], + "url": "https://2023.antflix.net#722.135_(H)" + }, + { + "body": "Circuit conductors that extend beyond one building and are run such that they are subject to accidental contact with electric light or power conductors operating over 300 volts to ground, or are exposed to lightning on interbuilding circuits on the same premises, shall comply with the following: For other than coaxial conductors, 800.44, 800.53, 800.100, 805.50, 805.93, 805.170(A), and 805.170(B)For coaxial conductors, 800.44, 820.93, and 820.100The installation requirements of Part I of Article 300Table 722.135(B) Installation of Listed Cables in Buildings Applications Cable Type1 Plenum Riser General-Purpose Limited-Use Under Carpet PLTC In ducts specifically fabricated for environmental air as described in 300.22(B)2 Cables in lengths as short as practicable to perform the required function Y N N N N N In metal raceway that complies with 300.22(B) Y Y Y Y N Y In other spaces used for environmental air (plenums) as described in 300.22(C) Cables in other spaces used for environmental air Y N N N N N Cables in metal raceway that complies with 300.22(C) Y Y Y Y N Y Cables in plenum communications raceways Y N N N N N Cables in plenum cable routing assemblies Y N N N N N Cables supported by open metal cable trays Y N N N N N Cables or cables installed in raceways or cable routing assemblies supported by solid bottom metal cable trays with solid metal covers Y Y Y Y N Y In risers and vertical runs Cables in vertical runs penetrating one or more floors and in vertical runs in a shaft Y Y N N N N Cables in metal raceways Y Y Y Y N Y Cables in fireproof shafts Y Y Y N N Y Cables in plenum communications raceways Y Y N N N N Cables in plenum cable routing assemblies Y Y N N N N Cables in riser communications raceways Y Y N N N N Cables in riser cable routing assemblies Y Y N N N N Cables in one- and two-family dwellings Y Y Y Y3 N Y Cables and innerducts installed in metal raceways in a riser having firestops at each floor2 Cables Y Y Y Y N Y Cables in plenum communications raceways(innerduct) Y Y Y Y N Y Cables in riser communications raceways (innerduct) Y Y Y Y N Y Cables in general-purpose communications raceways (innerduct) Y Y Y Y N Y In fireproof riser shafts having firestops at each floor2 Cables Y Y Y N N Y Cables in plenum communications raceways or plenum cable routing assemblies Y Y Y N N Y Cables in riser communications raceways or riser cable routing assemblies Y Y Y N N Y Cables in general-purpose communications raceways or general-purpose cable routing assemblies Y Y Y N N Y In cable trays Outdoors N N N N N Y Cables, or cables in plenum, riser, or general-purpose communications raceways, installed indoors Y Y Y N N Y In cross-connect arrays Cables, and cables in plenum, riser, or general-purpose communications raceways or cable routing assemblies Y Y Y N N Y In one-, two-, and multifamily dwellings, and in building locations other than the locations covered above Cables Y Y Y Y3 N Y Cables in plenum, riser, or general-purpose communications raceways or cable routing assemblies, or raceways recognized in Chapter 3 Y Y Y Y N Y Cables in nonconcealed spaces Y Y Y Y4 Y Y Under carpet, floor covering, modular flooring, and planks N N N N Y N 1\"N\" indicates that the cable type shall not be installed in the application. \"Y\" indicates that the cable type shall be permitted to be installed in the application, subject to any limitations described in this article or the articles described in 722.3(O).2In 300.22(B), cables shall be permitted in ducts specifically fabricated for environmental air only if directly associated with the air distribution system.3Limited-use cable shall be permitted to be installed only in one-, two-, and multifamily dwellings and only if the cable is smaller in diameter than 6.35 mm (0.25 in.).4The exposed length of cable shall not exceed 3.05 m (10 ft).Table 722.135(E) Cable Substitutions Cable Type Permitted Substitutions CL3P CMP CL2P CMP, CL3P CL3R CMP, CL3P, CMR CL2R CMP, CL3P, CL2P, CMR, CL3R PLTC None CL3 CMP, CL3P, CMR, CL3R, CMG, CM, PLTC CL2 CMP, CL3P, CL2P, CMR, CL3R, CL2R, CMG, CM, PLTC, CL3 CL3X CMP, CL3P, CMR, CL3R, CMG, CM, PLTC, CL3, CMX CL2X CMP, CL3P, CL2P, CMR, CL3R, CL2R, CMG, CM, PLTC, CL3, CL2, CMX, CL3X FPLP CMP FPLR CMP, FPLP, CMR FPL CMP, FPLP, CMR, FPLR, CMG, CM OFNP None OFCP OFNP OFNR OFNP OFCR OFNP, OFCP, OFNR OFNG, OFN OFNP, OFNR OFCG, OFC OFNP, OFCP, OFNR, OFCR, OFNG, OFN CMUC None [722.135_(I)](https://2023.antflix.net#722.135_(I))", + "displayTitle": "(I) Installation of Circuit Conductors Extending Beyond One Building", + "children": [], + "url": "https://2023.antflix.net#722.135_(I)" + } + ], + "url": "https://2023.antflix.net#722.135" + }, + { + "displayTitle": "Part II Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_113_II" + }, + { + "body": "Cables installed in buildings shall be listed in accordance with 722.179(A) and marked in accordance with 722.179(B), and they shall be permitted to be marked in accordance with 722.179(C). Exception: Optical fiber cables that are installed in compliance with 770.48 shall not be required to be listed. [722.179](https://2023.antflix.net#722.179)", + "displayTitle": "722.179 Listing and Marking of Cables", + "children": [ + { + "body": "Cables installed as wiring methods within buildings shall be listed as resistant to the spread of fire and other criteria in accordance with 722.179(A)(1) through (A) (16). Informational Note No. 1: See UL 13, Standard for Power-Limited Circuit Cables, for applicable requirements for listing of Class 2 and Class 3 cable and power-limited tray cable (PLTC). Informational Note No. 2: See UL 1424, Cables for Power-Limited Fire-Alarm Circuits, for applicable requirements for listing of power-limited fire alarm cable. Informational Note No. 3: See UL 1651, Optical Fiber Cable, for applicable requirements for listing of optical fiber cable. Informational Note No. 4: See UL 1400-2, Outline for Fault-Managed Power Systems - Part 2: Requirements for Class 4 Cables, for applicable requirements for listing of Class 4 cable. [722.179_(A)](https://2023.antflix.net#722.179_(A))", + "displayTitle": "(A) Listing of Cables", + "children": [ + { + "body": "Plenum cable shall be listed as suitable for use in ducts, plenums, and other space for environmental air and shall be listed as having adequate fire-resistant and low-smoke producing characteristics. Refer to Table 722.179(B) for plenum cable types. Informational Note: See NFPA 262-2019, Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air-Handling Spaces, for the test method used to determine that a cable is low-smoke producing and fire resistant, exhibiting a maximum peak optical density of 0.50 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.52 m (5 ft) or less. [722.179_(A)_(1)](https://2023.antflix.net#722.179_(A)_(1))", + "displayTitle": "(1) Plenum Cable", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(1)" + }, + { + "body": "Riser cable shall be listed as suitable for use in a vertical run in a shaft or from floor to floor and shall be listed as having fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. Informational Note: See ANSI/UL 1666-2012, Test for Flame Propagation Height of Electrical and Optical-Fiber Cable Installed Vertically in Shafts, for the cable requirements defining fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. [722.179_(A)_(2)](https://2023.antflix.net#722.179_(A)_(2))", + "displayTitle": "(2) Riser Cable", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(2)" + }, + { + "body": "General-purpose cable shall be listed as resistant to the spread of fire and as suitable for general-purpose use, except for use in risers, ducts, plenums, and other space used for environmental air. Informational Note: See UL 2556, Wire and Cable lest Methods, for defining resistant to the spread of fire. One method is to demonstrate that the cables do not spread fire to the top of the tray in the UL Flame Exposure, Vertical Tray Flame Test. The smoke measurements in the test method are not applicable. A method of defining resistant to the spread of fire is for the damage (char length) not to exceed 1.5 m (4 ft 11 in.) when performing the FT4 Vertical Flame Test. [722.179_(A)_(3)](https://2023.antflix.net#722.179_(A)_(3))", + "displayTitle": "(3) General-Purpose Cable", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(3)" + }, + { + "body": "Alternative general-purpose optical fiber cable shall be listed as suitable for general-purpose use, with the exception of risers and plenums, and shall also be resistant to the spread of fire. Informational Note: See CSA C22.2 No. 0.3-M-2001, Test Methods for Electrical Wires and Cables, for the CSA vertical flame test - cables in cable trays, that can also be used to define resistance to the spread of fire when the damage (char length) does not exceed 1.5 m (4 ft 11 in.). [722.179_(A)_(4)](https://2023.antflix.net#722.179_(A)_(4))", + "displayTitle": "(4) Alternative General-Purpose Cable", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(4)" + }, + { + "body": "Limited-use cable shall be listed as suitable for use in dwellings and raceways and shall be listed as resistant to flame spread. Informational Note: See ANSI/UL 2556, Standard for Wire and Cable Test Methods, for one method of determining that cable is resistant to flame spread by testing the cable to the FV-2/VW-1 test. [722.179_(A)_(5)](https://2023.antflix.net#722.179_(A)_(5))", + "displayTitle": "(5) Limited-Use Cable", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(5)" + }, + { + "body": "Type PLTC nonmetallic-sheathed, power-limited tray cable shall be listed as being suitable for cable trays, resistant to the spread of fire, and sunlight- and moisture-resistant. Type PLTC cable used in a wet location shall be listed for use in wet locations and marked \"wet\" or \"wet location.\" Informational Note: See ANSI/UL 1685-2010, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables, for the UL flame exposure, vertical tray flame test that is used to determine resistance to the spread of fire when cables do not spread fire to the top of the tray. The smoke measurements in the test method are not applicable. See CSA C22.2 No. 0.3-M-2001, Test Methods for Electrical Wires and Cables, for the CSA vertical flame test - cables in cable trays that can also be used to define resistance to the spread of fire when the damage (char length) does not exceed 1.5 m (4 ft 11 in.). [722.179_(A)_(6)](https://2023.antflix.net#722.179_(A)_(6))", + "displayTitle": "(6) Type PLTC", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(6)" + }, + { + "body": "Cables that are used for survivability of critical circuits under fire conditions shall comply with either 722.179(A)(7)(a), (A)(7)(b), or (A)(7)(c). Informational Note: See NFPA 72, National Fire Alarm and Signaling Code, 12.4.3 and 12.4.4, for additional information on fire alarm CI cable, fire-resistive cable systems, or electrical circuit protective systems used for fire alarm circuits to comply with the survivability requirements to maintain the circuit's electrical function during fire conditions for a defined period of time.CI Cables. CI cables of the types specified in 722.179(A)(1), (A)(2), (A)(3), (A)(4), and (A)(6) and used for survivability of critical circuits shall be marked with the additional classification using the suffix \"CI\" To maintain its listed fire-resistive rating, CI cable shall only be installed in free air in accordance with 722.24(C). CI cables shall only be permitted to be installed in a raceway where specifically listed and marked as part of a fire-resistive cable system as covered in 722.179(A)(7)(b).Informational Note: See UL 2196, Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, and UL 1425, Cables for Non\u2014Power-Limited Fire-Alarm Circuits, for information on establishing a rating for CI cable. The UL Guide Information for Nonpower-limited Fire Alarm Circuits (HNHT) contains information to identify the cable and its installation limitations to maintain the fire-resistive rating.Fire-Resistive Cables. Fire-resistive cables of the types specified in 722.179(A)(1), (A)(2), (A)(3), (A)(4), (A)(6), and (A)(7)(a) that are part of a fire-resistive cable system shall be identified with the system identifier and hourly rating marked on the protectant or the smallest unit container and installed in accordance with the listing of the system.Informational Note: See UL 2196, Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for information on establishing a rating for a fire-resistive cable system. The UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information to identify the system and its installation limitations to maintain a minimum fire-resistive rating.Electrical Circuit Protective System. Protectants for cables of the types specified in 722.179(A)(1), (A)(2), (A)(3), (A)(4), and (A)(6) that are part of an electrical circuit protective system shall be identified with the protective system identifier and hourly rating marked on the protectant or the smallest unit container and installed in accordance with the listing of the protective system.Informational Note: See UL 1724, Fire Tests for Electrical Circuit Protective Systems, for information on establishing a rating for an electrical circuit protective system. The UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information to identify the system and its installation limitations to maintain the fire-resistive rating. [722.179_(A)_(7)](https://2023.antflix.net#722.179_(A)_(7))", + "displayTitle": "(7) Circuit Integrity (CI) Cable, Fire-Resistive Cable System, or Electrical Circuit Protective System", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(7)" + }, + { + "body": "Class 3 single conductors used as other wiring within buildings shall be listed Type CL3 and shall not be smaller than 18 AWG. Informational Note: See ANSI/UL 1685-2010, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables, for the UL flame exposure, vertical tray flame test that is used to determine resistance to the spread of fire when cables do not spread fire to the top of the tray. The smoke measurements in the test method are not applicable. See CSA C22.2 No. 0.3-M-2001, Test Methods for Electrical Wires and Cables, for the CSA vertical flame test - cables in cable trays that can also be used to define resistance to the spread of fire when the damage (char length) does not exceed 1.5 m (4 ft 11 in.). [722.179_(A)_(8)](https://2023.antflix.net#722.179_(A)_(8))", + "displayTitle": "(8) Class 3 Single Conductors", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(8)" + }, + { + "body": "Class 2 and Class 3 LP cables shall be listed as suitable for carrying power and data up to a specified current limit for each conductor without exceeding the temperature rating of the cable. The cables shall be marked with the suffix \"-LP (XXA)\" where XXA designates the current limit in amperes per conductor. Informational Note: An example of the marking on 23 AWG, 4-pair, Class 2 cable rated 75\u00b0C with an LP current rating of 0.6 amperes per conductor is \"CL2-LP (0.6A) 75\u00b0C 23 AWG 4-pair.\" [722.179_(A)_(9)](https://2023.antflix.net#722.179_(A)_(9))", + "displayTitle": "(9) Limited Power (LP) Cable", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(9)" + }, + { + "body": "Undercarpet cable shall be listed as suitable for use under carpet, floor covering, modular tiles, and planks. Informational Note: See UL 444, Standard for Safety for Communications Cables, for the compressive loading test used to determine the suitability of cable for undercarpet use. [722.179_(A)_(10)](https://2023.antflix.net#722.179_(A)_(10))", + "displayTitle": "(10) Undercarpet Cables", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(10)" + }, + { + "body": "Cable used in a wet location shall be listed for use in wet locations and be marked \"wet\" or \"wet location\" or have a moisture-impervious metal sheath. [722.179_(A)_(11)](https://2023.antflix.net#722.179_(A)_(11))", + "displayTitle": "(11) Wet Locations", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(11)" + }, + { + "body": "Field-assembled optical fiber cable shall comply with 722.179(A) (12) (a) through (d). The specific combination of jacket and optical fibers intended to be installed as a field-assembled optical fiber cable shall be one of the types in 722.179(A)(1), (A)(2), or (A)(3) and shall be marked in accordance with Table 179(B).The jacket of a field-assembled optical fiber cable shall have a surface marking indicating the specific optical fibers with which it is identified for use.The optical fibers shall have a permanent marking, such as a marker tape, indicating the jacket with which they are identified for use.The jacket without fibers shall meet the listing requirements for communications raceways in 800.182(A), (B), or (C) in accordance with the cable marking. [722.179_(A)_(12)](https://2023.antflix.net#722.179_(A)_(12))", + "displayTitle": "(12) Field-Assembled Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(12)" + }, + { + "body": "Composite optical fiber cables shall be listed as electrical cables based on the type of electrical conductors. [722.179_(A)_(13)](https://2023.antflix.net#722.179_(A)_(13))", + "displayTitle": "(13) Cables Containing Optical Fibers", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(13)" + }, + { + "body": "Class 2 cables shall have a voltage rating of not less than 150 volts. Class 3 cables shall have a voltage rating of not less than 300 volts. Class 2 and Class 3 cables shall have a temperature rating of not less than 60\u00b0C (140\u00b0F). [722.179_(A)_(14)](https://2023.antflix.net#722.179_(A)_(14))", + "displayTitle": "(14) Class 2 and Class 3 Cable Voltage and Temperature Ratings", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(14)" + }, + { + "body": "PFLA cables shall comply with 722.179(A) (15) (a) through (A)(15)(d). Conductors for cables, other than coaxial cables, shall be solid or stranded copper. Coaxial cables shall be permitted to use 30 percent conductivity copper-covered steel center conductor wire.The size of conductors in a multiconductor cable shall not be smaller than 26 AWG. Single conductors shall not be smaller than 18 AWG. Conductors of 26 AWG shall be permitted only where spliced with a connector listed as suitable for 26 AWG to 24 AWG or larger conductors that are terminated on equipment or where the 26 AWG conductors are terminated on equipment listed as suitable for 26 AWG conductors.Cables shall have a voltage rating of not less than 300 volts.Cables shall have a temperature rating of not less than 60\u00b0C (140\u00b0F). [722.179_(A)_(15)](https://2023.antflix.net#722.179_(A)_(15))", + "displayTitle": "(15) Power-Limited Fire Alarm (PLFA) Cables", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(15)" + }, + { + "displayTitle": "(16) Class 4 Cable Construction", + "children": [ + { + "body": "Conductors of sizes not smaller than 24 AWG shall be permitted to be used. [722.179_(A)_(16)_(1)](https://2023.antflix.net#722.179_(A)_(16)_(1))", + "displayTitle": "(1) Sizes", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(16)_(1)" + }, + { + "body": "Insulation on conductors shall be rated not less than 450 volts dc. [722.179_(A)_(16)_(2)](https://2023.antflix.net#722.179_(A)_(16)_(2))", + "displayTitle": "(2) Insulation", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(16)_(2)" + }, + { + "body": "Cables shall have a voltage rating of not less than 450 volts dc. Voltage ratings shall not be marked on the cables. [722.179_(A)_(16)_(3)](https://2023.antflix.net#722.179_(A)_(16)_(3))", + "displayTitle": "(3) Voltage Rating", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(16)_(3)" + }, + { + "body": "Cables shall have a temperature rating of not less than 60\u00b0C (140\u00b0F). [722.179_(A)_(16)_(4)](https://2023.antflix.net#722.179_(A)_(16)_(4))", + "displayTitle": "(4) Temperature Rating", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(16)_(4)" + }, + { + "body": "Cables shall comply with any requirements provided in the listing of the system. Informational Note: See UL 1400-1, Outline for Fault-Managed Power Distribution Technologies - Part 1: General Requirements, for information on determining applicable requirements for the listing of Class 4 power systems. Excessive cable lengths can result in higher capacitance which could affect the safety of the circuit. [722.179_(A)_(16)_(5)](https://2023.antflix.net#722.179_(A)_(16)_(5))", + "displayTitle": "(5) Cabling", + "children": [], + "url": "https://2023.antflix.net#722.179_(A)_(16)_(5)" + } + ], + "url": "https://2023.antflix.net#722.179_(A)_(16)" + } + ], + "url": "https://2023.antflix.net#722.179_(A)" + }, + { + "body": "Cables shall be durably marked on the surface in accordance with the following: The AWG size or circular mil area shall be repeated at intervals not exceeding 610 mm (24 in.).All other markings shall be repeated at intervals not exceeding 1.0 m (40 in.).The proper type designation for the type of cable shall be marked in accordance with Table 722.179(B).The manufacturer's name, trademark, or other distinctive marking by which the organization responsible for the product can be readily identified shall be marked.The AWG size or circular mil area shall be marked.Informational Note No. 1: See Chapter 9, Table 8, for conductor area expressed in SI units for conductor sizes specified in AWG or circular mil area.The temperature rating for a temperature rating exceeding 60\u00b0C (140\u00b0F) shall be marked.Informational Note No. 2: A minimum temperature rating of 60\u00b0C is assumed for cables not marked with a temperature rating.Voltage ratings shall not be marked on the cables.Exception: Voltage markings shall be permitted where the cable has multiple listings and a voltage marking is required for one or more of the listings.Informational Note No. 3: Voltage markings on cables could be misinterpreted to suggest that the cables may be suitable for Class 1 electric light and power applications.Informational Note No. 4: Cable types are listed in descending order of tire resistance rating. [722.179_(B)](https://2023.antflix.net#722.179_(B))", + "displayTitle": "(B) Marking", + "children": [], + "url": "https://2023.antflix.net#722.179_(B)" + }, + { + "body": "Cables shall be permitted to be surface marked to indicate special characteristics of the cable materials. Informational Note No. 1: Examples of these characteristics include, but are not limited to, limited smoke, halogen free, low smoke and halogen free, and sunlight resistant. Informational Note No. 2: Some examples of optional markings are STI to indicate limited smoke characteristics. See UL 2556, Wire and Cable Test Methods; HF to indicate halogen free. See in UL 2885, Outline of Investigation for Acid Gas, Acidity and Conductivity of Combusted Materials; and LSHF to indicate halogen free and low-smoke characteristics. See IEC 61034-2, Measurement of smoke density of cables burning under defined conditions - Part 2: Test procedure and requirements. Table 722.179(B) Cable Type Markings Cable Type Cable Marking Class 4 plenum cable CL4P Class 3 plenum cable CL3P Class 2 plenum cable CL2P Power-limited fire alarm plenum cable FPLP Nonconductive optical fiber plenum cable OFNP Conductive optical fiber plenum cable OFCP Class 4 riser cable CL4R Class 3 riser cable CL3R Class 2 riser cable CL2R Power-limited fire alarm riser cable FPLR Nonconductive optical fiber riser cable OFNR Conductive optical fiber riser cable OFCR Class 4 general-purpose cable CL4 Class 3 general-purpose cable CL3 Class 2 general-purpose cable CL2 Power-limited fire alarm cable FPL Nonconductive general-purpose optical fiber cable OFN Conductive general-purpose optical fiber cable OFC Alternative nonconductive general-purpose optical fiber cable OFNG Alternative conductive general-purpose optical fiber cable OFCG Class 3 cable - limited use CL3X Class 2 cable - limited use CL2X Undercarpet cable CMUC Note: All types of CL2, CL3, and FPL cables containing optical fibers are provided with the suffix \"-OF.\" [722.179_(C)](https://2023.antflix.net#722.179_(C))", + "displayTitle": "(C) Optional Markings", + "children": [], + "url": "https://2023.antflix.net#722.179_(C)" + } + ], + "url": "https://2023.antflix.net#722.179" + } + ], + "url": "https://2023.antflix.net#722" + }, + { + "displayTitle": "Article 724 Class 1 Power-Limited Circuits and Class 1 Power-Limited Remote-Control and Signaling Circuits", + "children": [ + { + "body": "This article covers Class 1 circuits, including power-limited Class 1 remote-control and signaling circuits, that are not an integral part of a device or utilization equipment. Informational Note: See 300.26 for classifications of remote-control and signaling circuits. [724.1](https://2023.antflix.net#724.1)", + "displayTitle": "724.1 Scope", + "children": [], + "url": "https://2023.antflix.net#724.1" + }, + { + "body": "In addition to the requirements of this article, circuits and equipment shall comply with 724.3(A) through (J). [724.3](https://2023.antflix.net#724.3)", + "displayTitle": "724.3 Other Articles", + "children": [ + { + "body": "The number and size of conductors shall comply with 300.17. [724.3_(A)](https://2023.antflix.net#724.3_(A))", + "displayTitle": "(A) Number and Size of Conductors in Raceway", + "children": [], + "url": "https://2023.antflix.net#724.3_(A)" + }, + { + "body": "Installation of Class 1 circuits shall comply with 300.21. [724.3_(B)](https://2023.antflix.net#724.3_(B))", + "displayTitle": "(B) Spread of Fire or Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#724.3_(B)" + }, + { + "body": "Class 1 circuits installed in ducts, plenums, and other spaces used for environmental air shall comply with 300.22. [724.3_(C)](https://2023.antflix.net#724.3_(C))", + "displayTitle": "(C) Ducts, Plenums, and Other Air-Handling Spaces", + "children": [], + "url": "https://2023.antflix.net#724.3_(C)" + }, + { + "body": "Class 1 circuits shall not be installed in any hazardous (classified) locations except as permitted by other articles of this Code. [724.3_(D)](https://2023.antflix.net#724.3_(D))", + "displayTitle": "(D) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#724.3_(D)" + }, + { + "body": "Cable tray installations shall comply with Parts I and II of Article 392. [724.3_(E)](https://2023.antflix.net#724.3_(E))", + "displayTitle": "(E) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#724.3_(E)" + }, + { + "body": "Installation of raceways shall comply with 300.7 (A). [724.3_(F)](https://2023.antflix.net#724.3_(F))", + "displayTitle": "(F) Raceways Exposed to Different Temperatures", + "children": [], + "url": "https://2023.antflix.net#724.3_(F)" + }, + { + "body": "Vertical installations of circuit integrity (CI) cables and conductors installed in a raceway or conductors and cables of electrical circuit protective systems shall comply with 300.19. [724.3_(G)](https://2023.antflix.net#724.3_(G))", + "displayTitle": "(G) Vertical Support for Fire-Rated Cables and Conductors", + "children": [], + "url": "https://2023.antflix.net#724.3_(G)" + }, + { + "body": "Bushings shall be installed where cables emerge from raceways used for mechanical support or protection in accordance with 300.15(C). [724.3_(H)](https://2023.antflix.net#724.3_(H))", + "displayTitle": "(H) Bushings", + "children": [], + "url": "https://2023.antflix.net#724.3_(H)" + }, + { + "body": "Installation of conductors with other systems shall comply with 300.8. [724.3_(I)](https://2023.antflix.net#724.3_(I))", + "displayTitle": "(I) Installation of Conductors With Other Systems", + "children": [], + "url": "https://2023.antflix.net#724.3_(I)" + }, + { + "body": "Equipment grounding conductors shall be identified in accordance with 250.119. [724.3_(J)](https://2023.antflix.net#724.3_(J))", + "displayTitle": "(J) Identification of Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#724.3_(J)" + } + ], + "url": "https://2023.antflix.net#724.3" + }, + { + "body": "Access to electrical equipment shall not be denied by an accumulation of wires and cables preventing the removal of panels, including suspended ceiling panels. [724.21](https://2023.antflix.net#724.21)", + "displayTitle": "724.21 Access to Electrical Equipment Behind Panels Designed to Allow Access", + "children": [], + "url": "https://2023.antflix.net#724.21" + }, + { + "body": "Class 1 circuits shall be installed in a neat and workmanlike manner. Cables and conductors installed exposed on the surfaces of ceilings and sidewalls shall be supported by the building structure such that the cable will not be damaged by normal building use. Such cables shall be supported by straps, staples, hangers, cable ties, or similar fittings that are designed and installed to not damage the cable. The installation shall also comply with the requirements of 300.4 and 300.11. Informational Note: Paint, plaster, cleaners, abrasives, corrosive residues, or other contaminants can result in an undetermined alteration of Class 1 cable properties. [724.24](https://2023.antflix.net#724.24)", + "displayTitle": "724.24 Mechanical Execution of Work", + "children": [], + "url": "https://2023.antflix.net#724.24" + }, + { + "body": "Class 1 circuits shall be identified at terminal and junction locations in a manner that prevents unintentional interference with other circuits during testing and servicing. [724.30](https://2023.antflix.net#724.30)", + "displayTitle": "724.30 Class 1 Circuit Identification", + "children": [], + "url": "https://2023.antflix.net#724.30" + }, + { + "body": "If controlling safety-control equipment, Class 1 circuits shall be provided with physical protection if the failure of such equipment to operate introduces a direct fire or life hazard. All conductors of such circuits shall be installed in rigid metal conduit, intermediate metal conduit, rigid nonmetallic conduit, electrical metallic tubing, Type MI cable, or Type MC cable, or be otherwise suitably protected from physical damage. [724.31](https://2023.antflix.net#724.31)", + "displayTitle": "724.31 Safety-Control Equipment", + "children": [], + "url": "https://2023.antflix.net#724.31" + }, + { + "body": "Class 1 circuits shall be supplied from a source with a rated output of not more than 30 volts and 1000 volt-amperes. [724.40](https://2023.antflix.net#724.40)", + "displayTitle": "724.40 Class 1 Circuits", + "children": [ + { + "body": "Transformers shall be permitted to supply Class 1 circuits. Informational Note: See Parts I and II of Article 450 for information on transformers used to supply a Class 1 circuit. [724.40_(A)](https://2023.antflix.net#724.40_(A))", + "displayTitle": "(A) Class 1 Transformers", + "children": [], + "url": "https://2023.antflix.net#724.40_(A)" + }, + { + "body": "Power sources other than transformers shall be protected by overcurrent devices rated at not more than 167 percent of the volt-ampere rating of the source divided by the rated voltage. The overcurrent devices shall not be interchangeable with overcurrent devices of higher ratings. The overcurrent device shall be permitted to be an integral part of the power supply. To comply with the 1000 volt-ampere limitation of 724.40, the maximum output (VAmax) of power sources other than transformers shall be limited to 2500 volt-amperes, and the product of the maximum current (Imax) and maximum voltage (Vmax) shall not exceed 10,000 volt-amperes. These ratings shall be determined with any overcurrent-protective device bypassed. VAmax is the maximum volt-ampere output after one minute of operation regardless of load and with overcurrent protection bypassed, if used. Current-limiting impedance shall not be bypassed when determining VAmax. Imax is the maximum output current under any noncapacitive load, including short circuit, and with overcurrent protection bypassed, if used. Current-limiting impedance should not be bypassed when determining Where a current-limiting impedance listed for the purpose or as part of a listed product is used in combination with a stored energy source, such as a storage battery, to limit the output current, Imax limits apply after 5 seconds. Vmax is the maximum output voltage regardless of load with rated input applied. [724.40_(B)](https://2023.antflix.net#724.40_(B))", + "displayTitle": "(B) Other Class 1 Power Sources", + "children": [], + "url": "https://2023.antflix.net#724.40_(B)" + } + ], + "url": "https://2023.antflix.net#724.40" + }, + { + "body": "Overcurrent protection for conductors 14 AWG and larger shall be provided in accordance with the conductor ampacity, without applying the ampacity adjustment and correction factors specified in 310.15 to the ampacity calculation. Overcurrent protection shall not exceed 7 amperes for 18 AWG conductors and 10 amperes for 16 AWG. Exception: Where other articles of this Code permit or require other overcurrent protection. [724.43](https://2023.antflix.net#724.43)", + "displayTitle": "724.43 Class 1 Circuit Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#724.43" + }, + { + "body": "Overcurrent devices shall be located as specified in 724.45(A) through (E). [724.45](https://2023.antflix.net#724.45)", + "displayTitle": "724.45 Class 1 Circuit Overcurrent Device Location", + "children": [ + { + "body": "Overcurrent devices shall be located at the point where the conductor to be protected receives its supply. [724.45_(A)](https://2023.antflix.net#724.45_(A))", + "displayTitle": "(A) Point of Supply", + "children": [], + "url": "https://2023.antflix.net#724.45_(A)" + }, + { + "body": "Class 1 circuit conductors shall be permitted to be tapped, without overcurrent protection at the tap, where the overcurrent device protecting the circuit conductor is sized to protect the tap conductor. [724.45_(B)](https://2023.antflix.net#724.45_(B))", + "displayTitle": "(B) Feeder Taps", + "children": [], + "url": "https://2023.antflix.net#724.45_(B)" + }, + { + "body": "Class 1 circuit conductors 14 AWG and larger that are tapped from the load side of the overcurrent protective device(s) of a controlled light and power circuit shall require only short-circuit and ground-fault protection and shall be permitted to be protected by the branch-circuit overcurrent protective device(s) where the rating of the protective device(s) is not more than 300 percent of the ampacity of the Class 1 circuit conductor. [724.45_(C)](https://2023.antflix.net#724.45_(C))", + "displayTitle": "(C) Branch-Circuit Taps", + "children": [], + "url": "https://2023.antflix.net#724.45_(C)" + }, + { + "body": "Class 1 circuit conductors supplied by the secondary of a single-phase transformer having only a 2-wire (single-voltage) secondary shall be permitted to be protected by overcurrent protection provided on the primary side of the transformer if the protection is in accordance with 450.3 and does not exceed the value determined by multiplying the secondary conductor ampacity by the secondary-to-primary transformer voltage ratio. Transformer secondary conductors other than 2-wire shall not be considered to be protected by the primary overcurrent protection. [724.45_(D)](https://2023.antflix.net#724.45_(D))", + "displayTitle": "(D) Primary Side of Transformer", + "children": [], + "url": "https://2023.antflix.net#724.45_(D)" + }, + { + "body": "Class 1 circuit conductors supplied by the output of a single-phase, listed electronic power source other than a transformer having only a 2-wire (single-voltage) output for connection to Class 1 circuits shall be permitted to be protected by overcurrent protection provided on the input side of the electronic power source if the protection does not exceed the value determined by multiplying the Class 1 circuit conductor ampacity by the output-to-input voltage ratio. Electronic power source outputs other than 2-wire (single voltage) shall not be considered to be protected by the primary overcurrent protection. [724.45_(E)](https://2023.antflix.net#724.45_(E))", + "displayTitle": "(E) Input Side of Electronic Power Source", + "children": [], + "url": "https://2023.antflix.net#724.45_(E)" + } + ], + "url": "https://2023.antflix.net#724.45" + }, + { + "body": "Class 1 circuits shall be installed in accordance with 300.2 through 300.26. Exception No. 1: The requirements of 724.48 through 724.51 shall be permitted to apply in installations of Class 1 circuits. Exception No. 2: Methods permitted or required by other articles of this Code shall apply to installations of Class 1 circuits. [724.46](https://2023.antflix.net#724.46)", + "displayTitle": "724.46 Class 1 Circuit Wiring Methods", + "children": [], + "url": "https://2023.antflix.net#724.46" + }, + { + "body": "Class 1 circuits shall be permitted to be installed with other circuits as specified in 724.48(A) and (B). [724.48](https://2023.antflix.net#724.48)", + "displayTitle": "724.48 Conductors of Different Circuits in the Same Cable, Cable Tray, Enclosure, or Raceway", + "children": [ + { + "body": "Class 1 circuits shall be permitted to occupy the same cable, cable tray, enclosure, or raceway regardless of whether the individual circuits are alternating current or direct current if all conductors are insulated for the maximum voltage of any conductor in the cable, cable tray, enclosure, or raceway. [724.48_(A)](https://2023.antflix.net#724.48_(A))", + "displayTitle": "(A) Two or More Class 1 Circuits", + "children": [], + "url": "https://2023.antflix.net#724.48_(A)" + }, + { + "body": "Class 1 circuits shall be permitted to be installed with power-supply conductors as specified in 724.48(B)(1) through (B)(4). [724.48_(B)](https://2023.antflix.net#724.48_(B))", + "displayTitle": "(B) Class 1 Circuits With Power-Supply Circuits", + "children": [ + { + "body": "Class 1 circuits and power-supply circuits shall be permitted to occupy the same cable, enclosure, or raceway without a barrier only where the equipment powered is functionally associated. Class 1 circuits shall be permitted to be installed together with the conductors of electric light, power, non-power-limited fire alarm systems, and medium-power network-powered broadband communications circuits where separated by a barrier. [724.48_(B)_(1)](https://2023.antflix.net#724.48_(B)_(1))", + "displayTitle": "(1) In Cables, Enclosures, or Raceways", + "children": [], + "url": "https://2023.antflix.net#724.48_(B)_(1)" + }, + { + "body": "Class 1 circuits and power-supply circuits shall be permitted to be installed in factory- or field-assembled control centers. [724.48_(B)_(2)](https://2023.antflix.net#724.48_(B)_(2))", + "displayTitle": "(2) In Factory- or Field-Assembled Control Centers", + "children": [], + "url": "https://2023.antflix.net#724.48_(B)_(2)" + }, + { + "body": "Class 1 circuits and power-supply circuits shall be permitted to be installed as underground conductors in manholes in accordance with one of the following: The power-supply or Class 1 circuit conductors are in metal-enclosed cable or Type UF cable.The conductors are permanently separated from power-supply conductors by continuous firmly fixed non-conductors, such as flexible tubing, in addition to insulation on the wire.The conductors are permanently and effectively separated from power-supply conductors and securely fastened to racks, insulators, or other approved supports. [724.48_(B)_(3)](https://2023.antflix.net#724.48_(B)_(3))", + "displayTitle": "(3) In Manholes", + "children": [], + "url": "https://2023.antflix.net#724.48_(B)_(3)" + }, + { + "body": "Installations in cable trays shall comply with the requirements of one of the following: Class 1 circuit conductors and power-supply conductors not functionally associated with the Class 1 circuit conductors shall be separated by a solid fixed barrier of a material compatible with the cable tray.Class 1 circuit conductors and power-supply conductors not functionally associated with the Class 1 circuit conductors shall be permitted to be installed in a cable tray without barriers where all of the conductors are installed with separate multiconductor Type AC, Type MC, Type MI, or Type TC cables and all the conductors in the cables are insulated at 600 volts or greater. [724.48_(B)_(4)](https://2023.antflix.net#724.48_(B)_(4))", + "displayTitle": "(4) In Cable Trays", + "children": [], + "url": "https://2023.antflix.net#724.48_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#724.48_(B)" + } + ], + "url": "https://2023.antflix.net#724.48" + }, + { + "displayTitle": "724.49 Class 1 Circuit Conductors", + "children": [ + { + "body": "Conductors that are 18 AWG and 16 AWG shall be permitted to be used if they supply loads that do not exceed the ampacities specified in 402.5 and are installed in a raceway, an approved enclosure, or a listed cable. Conductors larger than 16 AWG shall not supply loads greater than the ampacities specified in 310.14. Flexible cords shall comply with the requirements of Article 400. [724.49_(A)](https://2023.antflix.net#724.49_(A))", + "displayTitle": "(A) Sizes and Use", + "children": [], + "url": "https://2023.antflix.net#724.49_(A)" + }, + { + "body": "Insulation on conductors shall be rated for the system voltage and not less than 600 volts. Conductors larger than 16 AWG shall comply with the requirements of Article 310. Conductors that are 18 AWG and 16 AWG shall be Type FFH-2, Type KF-2, Type KFF-2, Type PAF, Type PAFF, Type PF, Type PFF, Type PGF, Type PGFF, Type PTF, Type PTFF, Type RFH-2, Type RFHH-2, Type RFHH-3, Type SF-2, SFF-2, Type TF, Type TFF, Type TFFN, Type TFN, Type ZF, or Type ZFF. Conductors with other types and thicknesses of insulation shall be permitted if listed for Class 1 circuit use. [724.49_(B)](https://2023.antflix.net#724.49_(B))", + "displayTitle": "(B) Insulation", + "children": [], + "url": "https://2023.antflix.net#724.49_(B)" + } + ], + "url": "https://2023.antflix.net#724.49" + }, + { + "displayTitle": "724.51 Number of Conductors in Cable Trays and Raceways, and Ampacity Adjustment", + "children": [ + { + "body": "Where only Class 1 circuit conductors are in a raceway, the number of conductors shall be determined in accordance with 300.17. The ampacity adjustment factors specified in 310.15(C)(1) shall apply only if such conductors carry continuous loads in excess of 10 percent of the ampacity of each conductor. [724.51_(A)](https://2023.antflix.net#724.51_(A))", + "displayTitle": "(A) Class 1 Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#724.51_(A)" + }, + { + "body": "Where power-supply conductors and Class 1 circuit conductors are permitted in a raceway in accordance with 724.48, the number of conductors shall be determined in accordance with 300.17. The ampacity adjustment factors specified in 310.15(C)(1) shall apply as follows: To all conductors where the Class 1 circuit conductors carry continuous loads in excess of 10 percent of the ampacity of each conductor and where the total number of conductors is more than threeTo the power-supply conductors only, where the Class 1 circuit conductors do not carry continuous loads in excess of 10 percent of the ampacity of each conductor and where the number of power-supply conductors is more than three [724.51_(B)](https://2023.antflix.net#724.51_(B))", + "displayTitle": "(B) Power-Supply Conductors and Class 1 Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#724.51_(B)" + }, + { + "body": "Where Class 1 circuit conductors are installed in cable trays, they shall comply with the requirements of 392.22 and 392.80(A). [724.51_(C)](https://2023.antflix.net#724.51_(C))", + "displayTitle": "(C) Class 1 Circuit Conductors in Cable Trays", + "children": [], + "url": "https://2023.antflix.net#724.51_(C)" + } + ], + "url": "https://2023.antflix.net#724.51" + }, + { + "body": "Class 1 circuits that extend aerially beyond one building shall also meet the requirements of Part I of Article 225. [724.52](https://2023.antflix.net#724.52)", + "displayTitle": "724.52 Circuits Extending Beyond One Building", + "children": [], + "url": "https://2023.antflix.net#724.52" + } + ], + "url": "https://2023.antflix.net#724" + }, + { + "displayTitle": "Article 725 Class 2 and Class 3 Power-Limited Circuits", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_114_I" + }, + { + "body": "This article covers power-limited circuits, including power-limited remote-control and signaling circuits, that are not an integral part of a device or of utilization equipment. Informational Note No. 1: The circuits described herein are characterized by usage and electrical power limitations that differentiate them from electric light and power circuits; therefore, alternative requirements are given regarding minimum wire sizes, ampacity adjustment and correction factors, overcurrent protection, insulation requirements, and wiring methods and materials. Informational Note No. 2: See 300.26 for classifications of remote-control and signaling circuits. [725.1](https://2023.antflix.net#725.1)", + "displayTitle": "725.1 Scope", + "children": [], + "url": "https://2023.antflix.net#725.1" + }, + { + "body": "In addition to the requirements of this article, circuits and equipment shall comply with the articles or sections listed in 725.3(A) through (E). Only those sections of Article 300 referenced in this article shall apply to Class 2 and Class 3 circuits. [725.3](https://2023.antflix.net#725.3)", + "displayTitle": "725.3 Other Articles", + "children": [ + { + "body": "Installation of Class 2 and Class 3 circuits shall comply with 300.21. [725.3_(A)](https://2023.antflix.net#725.3_(A))", + "displayTitle": "(A) Spread of Fire or Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#725.3_(A)" + }, + { + "body": "Class 2 and Class 3 circuits installed in ducts, plenums, or other space used for environmental air shall comply with 300.22. [725.3_(B)](https://2023.antflix.net#725.3_(B))", + "displayTitle": "(B) Ducts, Plenums, and Other Air-Handling Spaces", + "children": [], + "url": "https://2023.antflix.net#725.3_(B)" + }, + { + "body": "Motor control circuits tapped from the load side of the motor branch-circuit protective device(s) as specified in 430.72(A) shall comply with Part IV of Article 430. [725.3_(C)](https://2023.antflix.net#725.3_(C))", + "displayTitle": "(C) Motor Control Circuits", + "children": [], + "url": "https://2023.antflix.net#725.3_(C)" + }, + { + "body": "Equipment grounding conductors shall be identified in accordance with 250.119. [725.3_(D)](https://2023.antflix.net#725.3_(D))", + "displayTitle": "(D) Identification of Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#725.3_(D)" + }, + { + "body": "The listing and installation of cables for Class 2 and Class 3 circuits shall comply with Part I and Part II of Article 722. [725.3_(E)](https://2023.antflix.net#725.3_(E))", + "displayTitle": "(E) Cables for Class 2 and Class 3 Circuits", + "children": [], + "url": "https://2023.antflix.net#725.3_(E)" + } + ], + "url": "https://2023.antflix.net#725.3" + }, + { + "body": "Cables and equipment shall be permitted to be used in hazardous (classified) locations where specifically permitted by other articles in this Code. [725.10](https://2023.antflix.net#725.10)", + "displayTitle": "725.10 Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#725.10" + }, + { + "body": "Access to electrical equipment shall not be denied by an accumulation of wires and cables that prevents removal of panels, including suspended ceiling panels. [725.21](https://2023.antflix.net#725.21)", + "displayTitle": "725.21 Access to Electrical Equipment Behind Panels Designed to Allow Access", + "children": [], + "url": "https://2023.antflix.net#725.21" + }, + { + "body": "Class 2 and Class 3 equipment shall be installed in a neat and workmanlike manner. The installation shall also comply with 300.4 and 300.11. [725.24](https://2023.antflix.net#725.24)", + "displayTitle": "725.24 Mechanical Execution of Work", + "children": [], + "url": "https://2023.antflix.net#725.24" + }, + { + "body": "Class 2 and Class 3 circuits shall be identified at terminal and junction locations in a manner that prevents unintentional interference with other circuits during testing and servicing. [725.30](https://2023.antflix.net#725.30)", + "displayTitle": "725.30 Class 2 and Class 3 Circuit Identification", + "children": [], + "url": "https://2023.antflix.net#725.30" + }, + { + "body": "Where damage to power-limited circuits can result in a failure of safety-control equipment that would introduce a direct fire or life hazard, the power-limited circuits shall be installed in accordance with 724.31. Room thermostats, water temperature regulating devices, and similar controls used in conjunction with electrically controlled household heating and air conditioning shall not be considered safety-control equipment. [725.31](https://2023.antflix.net#725.31)", + "displayTitle": "725.31 Safety-Control Equipment", + "children": [], + "url": "https://2023.antflix.net#725.31" + }, + { + "displayTitle": "Part II Class 2 and Class 3 Circuits", + "children": [], + "url": "https://2023.antflix.net#divider_114_II" + }, + { + "displayTitle": "725.60 Power Sources for Class 2 and Class 3 Circuits", + "children": [ + { + "body": "The power source for a Class 2 or a Class 3 circuit shall be as follows: Informational Note No. 1: Informational Note Figure 725.60 illustrates the relationships between Class 2 or Class 3 power sources, their supply, and the Class 2 or Class 3 circuits.Informational Note No. 2: See Chapter 9, Table 11(A) and Table 11(B), for requirements for listed Class 2 and Class 3 power sources. Informational Note Figure 725.60 Class 2 and Class 3 Circuits. A listed Class 2 or Class 3 transformerA listed Class 2 or Class 3 power supplyOther listed equipment marked to identify the Class 2 or Class 3 power sourceException No. 1 to (3): Thermocouples shall not require listing as a Class 2 power source.Exception No. 2 to (3): Limited power circuits of listed equipment where these circuits have energy levels rated at or below the limits established in Chapter 9, Table 11(A) and Table 11(B).Informational Note No. 3: Examples of other listed equipment are as follows:A circuit card listed for use as a Class 2 or Class 3 power source where used as part of a listed assemblyA current-limiting impedance, listed for the purpose, or part of a listed product, used in conjunction with a non-power-limited transformer or a stored energy source, for example, storage battery, to limit the output currentA thermocoupleLimited voltage/current or limited impedance secondary communications circuits of listed industrial control equipmentListed audio/video, information technology (computer), communications, and industrial equipment limited-power circuitsInformational Note No. 4: One way to determine applicable requirements for listing of information technology (computer) equipment is to refer to UL 60950-1-2011, Standard for Safely of Information Technology Equipment. Another way to determine applicable requirements for listing of audio/video, information technology, and communications equipment is to refer to UL 62368-1-2014, Safety of audio/video, information and communication technology equipment. Typically such circuits are used to interconnect data circuits for the purpose of exchanging information data. One way to determine applicable requirements for listing of industrial equipment is to refer to UL 61010-2-201, Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-201: Particular requirements for control equipment, and/or UL 61800-5-1, Adjustable speed electrical power drive systems - Part 5-1: Safety requirements - Electrical, thermal and energy.A battery source or battery source system that is listed and identified as Class 2 [725.60_(A)](https://2023.antflix.net#725.60_(A))", + "displayTitle": "(A) Power Source", + "children": [], + "url": "https://2023.antflix.net#725.60_(A)" + }, + { + "body": "Class 2 or Class 3 power sources shall not have the output connections paralleled or otherwise interconnected unless listed for such interconnection. [725.60_(B)](https://2023.antflix.net#725.60_(B))", + "displayTitle": "(B) Interconnection of Power Sources", + "children": [], + "url": "https://2023.antflix.net#725.60_(B)" + }, + { + "body": "The equipment supplying the circuits shall be durably marked where plainly visible to indicate each circuit that is a Class 2 or Class 3 circuit. The power sources for limited power circuits in 725.60(A)(3), limited power circuits for listed audio/video equipment, listed information technology equipment, listed communications equipment, and listed industrial equipment in 725.60(A)(4) shall have a label indicating the maximum voltage and rated current output per conductor for each connection point on the power source. Where multiple connection points have the same rating, a single label shall be permitted to be used. Informational Note No. 1: Rated current for power sources covered in 725.144 is the output current per conductor the power source is designed to deliver to an operational load at normal operating conditions, as declared by the manufacturer. Informational Note No. 2: An example of a label is \"52V @ 0.433A, 57V MAX\" for an IEEE 802.3 compliant Class 8 power source. [725.60_(C)](https://2023.antflix.net#725.60_(C))", + "displayTitle": "(C) Marking", + "children": [], + "url": "https://2023.antflix.net#725.60_(C)" + } + ], + "url": "https://2023.antflix.net#725.60" + }, + { + "body": "Conductors and equipment on the supply side of the power source shall be installed in accordance with the appropriate requirements of Chapters 1 through 4. Exception: The input leads of a transformer or other power source supplying Class 2 and Class 3 circuits shall be permitted to be smaller than 14 AWG but not smaller than 18 AWG if they are protected by an overcurrent device rated not over 20 amperes, are not over 305 mm (12 in.) long, and have insulation that complies with 724.49(B). [725.127](https://2023.antflix.net#725.127)", + "displayTitle": "725.127 Wiring Methods on Supply Side of the Class 2 or Class 3 Power Source", + "children": [], + "url": "https://2023.antflix.net#725.127" + }, + { + "body": "Class 2 and Class 3 circuits on the load side of the power source shall be permitted to be installed using wiring methods and materials in accordance with 725.130(A), (B), or a combination of both. Parts I and II of Article 722 shall apply. [725.130](https://2023.antflix.net#725.130)", + "displayTitle": "725.130 Wiring Methods and Materials on Load Side of the Class 2 or Class 3 Power Source", + "children": [ + { + "body": "Use of Class 1 wiring methods for Class 2 and Class 3 circuits shall be permitted. Separation from electric light, power, Class 1, non-power-limited fire alarm circuit conductors, and medium-power network-powered broadband communications cables shall comply with 725.136. Exception: The ampacity adjustment factors given in 310.15(C)(1) shall not apply. [725.130_(A)](https://2023.antflix.net#725.130_(A))", + "displayTitle": "(A) Class 1 Wiring Methods and Materials", + "children": [], + "url": "https://2023.antflix.net#725.130_(A)" + }, + { + "body": "Conductors on the load side of the power source shall be insulated in accordance with 722.179 and be installed in accordance with 722.135 and 725.136 through 725.144. Exception No. 1: As provided for in 620.21 for elevators and similar equipment. Exception No. 2: Other wiring methods and materials installed in accordance with 725.3 shall be permitted to extend or replace the conductors and cables described in 722.179(A) and permitted by 725.130(B). Exception No. 3: Bare Class 2 conductors shall be permitted as part of a listed intrusion protection system where installed in accordance with the listing instructions for the system. [725.130_(B)](https://2023.antflix.net#725.130_(B))", + "displayTitle": "(B) Class 2 and Class 3 Wiring Methods and Materials", + "children": [], + "url": "https://2023.antflix.net#725.130_(B)" + } + ], + "url": "https://2023.antflix.net#725.130" + }, + { + "displayTitle": "725.136 Separation From Electric Light, Power, Class 1, Non-Power-Limited Fire Alarm Circuit Conductors, and Medium-Power Network-Powered Broadband Communications Cables", + "children": [ + { + "body": "Cables and conductors of Class 2 and Class 3 circuits shall not be placed in any cable, cable tray, compartment, enclosure, manhole, outlet box, device box, raceway, or similar fitting with conductors of electric light, power, Class 1, non\u2014power-limited fire alarm circuits, and medium-power network-powered broadband communications circuits unless permitted by 725.136(B) through (I). [725.136_(A)](https://2023.antflix.net#725.136_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#725.136_(A)" + }, + { + "body": "Class 2 and Class 3 circuits shall be permitted to be installed together with the conductors of electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are separated by a barrier. [725.136_(B)](https://2023.antflix.net#725.136_(B))", + "displayTitle": "(B) Separated by Barriers", + "children": [], + "url": "https://2023.antflix.net#725.136_(B)" + }, + { + "body": "In enclosures, Class 2 and Class 3 circuits shall be permitted to be installed in a raceway to separate them from Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits. [725.136_(C)](https://2023.antflix.net#725.136_(C))", + "displayTitle": "(C) Raceways Within Enclosures", + "children": [], + "url": "https://2023.antflix.net#725.136_(C)" + }, + { + "body": "Class 2 and Class 3 circuit conductors in compartments, enclosures, device boxes, outlet boxes, or similar fittings shall be permitted to be installed with electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are introduced solely to connect the equipment connected to Class 2 and Class 3 circuits, and where one of the following applies: The electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors are routed to maintain a minimum of 6 mm (0.25 in.) separation from the conductors and cables of Class 2 and Class 3 circuits.The circuit conductors operate at 150 volts or less to ground and comply with one of the following:The Class 2 and Class 3 circuits are installed using Type CL3, Type CL3R, or Type CL3P or permitted substitute cables if these Class 3 cable conductors extending beyond the jacket are separated by a minimum of 6 mm (0.25 in.) or by a nonconductive sleeve or nonconductive barrier from all other conductors.The Class 2 and Class 3 circuit conductors are installed as a Class 1 circuit in accordance with 724.40. [725.136_(D)](https://2023.antflix.net#725.136_(D))", + "displayTitle": "(D) Associated Systems Within Enclosures", + "children": [], + "url": "https://2023.antflix.net#725.136_(D)" + }, + { + "body": "Class 2 and Class 3 circuit conductors entering compartments, enclosures, device boxes, outlet boxes, or similar fittings shall be permitted to be installed with Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are introduced solely to connect the equipment connected to Class 2 and Class 3 circuits. Where Class 2 and Class 3 circuit conductors must enter an enclosure that is provided with a single opening, they shall be permitted to enter through a single fitting (such as a tee) if the conductors are separated from the conductors of the other circuits by a continuous and firmly fixed nonconductor, such as flexible tubing. [725.136_(E)](https://2023.antflix.net#725.136_(E))", + "displayTitle": "(E) Enclosures With Single Opening", + "children": [], + "url": "https://2023.antflix.net#725.136_(E)" + }, + { + "body": "Underground Class 2 and Class 3 circuit conductors in a manhole shall be permitted to be installed with Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where one of the following conditions is met: The electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors are in a metal-enclosed cable or Type UF cable.The Class 2 and Class 3 circuit conductors are permanently and effectively separated from the conductors of other circuits by a continuous and firmly fixed nonconductor, such as flexible tubing, in addition to the insulation or covering on the wire.The Class 2 and Class 3 circuit conductors are permanently and effectively separated from conductors of the other circuits and securely fastened to racks, insulators, or other approved supports. [725.136_(F)](https://2023.antflix.net#725.136_(F))", + "displayTitle": "(F) Manholes", + "children": [], + "url": "https://2023.antflix.net#725.136_(F)" + }, + { + "body": "Class 2 and Class 3 circuit conductors shall be permitted to be installed in cable trays where the conductors of the electric light, Class 1, and non\u2014power-limited fire alarm circuits are separated by a solid fixed barrier of a material compatible with the cable tray or where the Class 2 or Class 3 circuits are installed in Type MC cable. [725.136_(G)](https://2023.antflix.net#725.136_(G))", + "displayTitle": "(G) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#725.136_(G)" + }, + { + "body": "Class 2 and Class 3 circuits shall be permitted to be installed together with the conductors of electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are installed using Class 1 wiring methods in accordance with 724.46 and where they are protected by an approved raceway. [725.136_(H)](https://2023.antflix.net#725.136_(H))", + "displayTitle": "(H) Where Protected", + "children": [], + "url": "https://2023.antflix.net#725.136_(H)" + }, + { + "body": "For other applications, conductors of Class 2 and Class 3 circuits shall be separated by at least 50 mm (2 in.) from conductors of any electric light, power, Class 1, non\u2014power-limited fire alarm, or medium-power network-powered broadband communications circuits unless one of the following conditions is met: Either all of the electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors or all of the Class 2 and Class 3 circuit conductors are in a raceway or in metal-sheathed, metal-clad, nonmetallic-sheathed, Type TC, or Type UF cables.All of the electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors are permanently separated from all of the Class 2 and Class 3 circuit conductors by a continuous and firmly fixed nonconductor, such as porcelain tubes or flexible tubing, in addition to the insulation on the conductors. [725.136_(I)](https://2023.antflix.net#725.136_(I))", + "displayTitle": "(I) Other Applications", + "children": [], + "url": "https://2023.antflix.net#725.136_(I)" + } + ], + "url": "https://2023.antflix.net#725.136" + }, + { + "displayTitle": "725.139 Installation of Conductors of Different Circuits in the Same Cable, Enclosure, Cable Tray, Raceway, or Cable Routing Assembly", + "children": [ + { + "body": "Conductors of two or more Class 2 circuits shall be permitted within the same cable, enclosure, raceway, or cable routing assembly. [725.139_(A)](https://2023.antflix.net#725.139_(A))", + "displayTitle": "(A) Two or More Class 2 Circuits", + "children": [], + "url": "https://2023.antflix.net#725.139_(A)" + }, + { + "body": "Conductors of two or more Class 3 circuits shall be permitted within the same cable, enclosure, raceway, or cable routing assembly. [725.139_(B)](https://2023.antflix.net#725.139_(B))", + "displayTitle": "(B) Two or More Class 3 Circuits", + "children": [], + "url": "https://2023.antflix.net#725.139_(B)" + }, + { + "body": "Conductors of one or more Class 2 circuits shall be permitted within the same cable, enclosure, raceway, or cable routing assembly with conductors of Class 3 circuits if the insulation of the Class 2 circuit conductors in the cable, enclosure, raceway, or cable routing assembly is at least that required for Class 3 circuits. [725.139_(C)](https://2023.antflix.net#725.139_(C))", + "displayTitle": "(C) Class 2 Circuits With Class 3 Circuits", + "children": [], + "url": "https://2023.antflix.net#725.139_(C)" + }, + { + "displayTitle": "(D) Class 2 and Class 3 Circuits With Communications Circuits", + "children": [ + { + "body": "Conductors of one or more Class 2 or Class 3 circuits shall be permitted in the same cable with conductors of communications circuits if the cable is a listed communications cable installed in accordance with Part V of Article 800. The cables shall be listed as communications cables. [725.139_(D)_(1)](https://2023.antflix.net#725.139_(D)_(1))", + "displayTitle": "(1) Communications Cables", + "children": [], + "url": "https://2023.antflix.net#725.139_(D)_(1)" + }, + { + "body": "Cables constructed of individually listed Class 2, Class 3, and communications cables under a common jacket shall be permitted to be classified as communications cables. The fire resistance rating of the composite cable shall be determined by the performance of the composite cable. [725.139_(D)_(2)](https://2023.antflix.net#725.139_(D)_(2))", + "displayTitle": "(2) Composite Cables", + "children": [], + "url": "https://2023.antflix.net#725.139_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#725.139_(D)" + }, + { + "body": "Jacketed cables of Class 2 or Class 3 circuits shall be permitted in the same enclosure, cable tray, raceway, or cable routing assembly with jacketed cables of any of the following: Power-limited fire alarm systems in compliance with Parts I and III of Article 760Nonconductive and conductive optical fiber cables in compliance with Parts I and IV of Article 770Communications circuits in compliance with Parts I and IV of Article 805Community antenna television and radio distribution systems in compliance with Parts I and IV of Article 820Low-power, network-powered broadband communications in compliance with Parts I and IV of Article 830 [725.139_(E)](https://2023.antflix.net#725.139_(E))", + "displayTitle": "(E) Class 2 or Class 3 Cables With Other Circuit Cables", + "children": [], + "url": "https://2023.antflix.net#725.139_(E)" + }, + { + "body": "Audio system circuits described in 640.9(C) and installed using Class 2 or Class 3 wiring methods in compliance with 722.135 shall not be installed in the same cable, raceway, or cable routing assembly with Class 2 or Class 3 conductors or cables. [725.139_(F)](https://2023.antflix.net#725.139_(F))", + "displayTitle": "(F) Class 2 or Class 3 Conductors or Cables and Audio System Circuits", + "children": [], + "url": "https://2023.antflix.net#725.139_(F)" + } + ], + "url": "https://2023.antflix.net#725.139" + }, + { + "body": "Sections 725.144(A) and (B) shall apply to Class 2 and Class 3 circuits that transmit power and data to a powered device over listed cabling. Section 300.11 and Parts I and III of Article 725 shall apply to Class 2 and Class 3 circuits that transmit power and data. The conductors that carry power for the data circuits shall be copper. The current in the power circuit shall not exceed the current limitation of the connectors. Informational Note No. 1: One example of the use of cables that transmit power and data is the connection of closed-circuit TV cameras (CCTV). Informational Note No. 2: The 8P8C connector is in widespread use with powered communications systems. IEC 60603-7-2008, Connectors for electronic equipment - Part 7-1: Detail specification for 8-way, unshielded, free and, fixed connectors, specifies these connectors to have a current-carrying capacity per contact of 1.0 amperes maximum at 60\u00b0C (149\u00b0F). See IEC 60603-7 for more information on current-carrying capacity at higher and lower temperatures. Informational Note No. 3: The requirements of Table 725.144 were derived for carrying power and data over 4-pair copper balanced twisted pair cabling. This type of cabling is described in ANSI/TIA 568-C.2-2009, Commercial Building Telecommunications Cabling Standard - Part 2: Balanced Twisted-Pair Telecommunications Cabling and Components. Informational Note No. 4: See TIA-TSB-184-A-2017, Guidelines for Supporting Power Delivery Over Balanced Twisted-Pair Cabling, for information on installation and management of balanced twisted pair cabling supporting power delivery. Informational Note No. 5: See ANSI/NEMA C137.3-2017, American National Standard for Lighting Systems - Minimum Requirements for Installation of Energy Efficient Power over Ethernet (PoE) Lighting Systems, for information on installation of cables for PoE lighting systems. Informational Note No. 6: Rated current for power sources covered in 725.144 is the output current per conductor the power source is designed to deliver to an operational load at normal operating conditions, as declared by the manufacturer. In the design of these systems, the actual current in a given conductor might vary from the rated current per conductor by as much as 20 percent. An increase in current in one conductor is offset by a corresponding decrease in current in one or more conductors of the same cable. [725.144](https://2023.antflix.net#725.144)", + "displayTitle": "725.144 Bundling of Cables Transmitting Power and Data", + "children": [ + { + "body": "Where Type CL3P, Type CL2P, Type CL3R, Type CL2R, Type CL3, or Type CL2 4-pair cables transmit power and data, the rated current per conductor of the power source shall not exceed the ampacities in Table 725.144 at an ambient temperature of 30\u00b0C (86\u00b0F). For ambient temperatures above 30\u00b0C (86\u00b0F), the correction factors in Table 310.15(B)(1)(1) or in Equation 310.15(B) shall apply. Exception: Compliance with Table 725.144 shall not be required for installations where conductors are 24 AWG or larger and the rated current per conductor of the power source does not exceed 0.3 amperes. Informational Note: One example of the use of Class 2 cables is a network of closed-circuit TV cameras using 24 AWG, 60\u00b0C rated, Type CL2R, Category 5e balanced twisted-pair cabling. [725.144_(A)](https://2023.antflix.net#725.144_(A))", + "displayTitle": "(A) Use of 4-Pair Class 2 or Class 3 Cables to Transmit Power and Data", + "children": [], + "url": "https://2023.antflix.net#725.144_(A)" + }, + { + "body": "Type CL3P-LP, Type CL2P-LP, Type CL3R-LP, Type CL2R-LP, Type CL3-LP, or Type CL2-LP cables shall be permitted to supply power to equipment from a power source with a rated current per conductor up to the marked current limit located immediately following the suffix \"-LP\" and shall be permitted to transmit data to the equipment. Where the number of bundled LP cables is 192 or less and the selected ampacity of the cables in accordance with Table 725.144 exceeds the marked current limit of the cable, the ampacity determined from the table shall be permitted to be used. For ambient temperatures above 30\u00b0C (86\u00b0F), the correction factors of Table 310.15(B)(1)(1) or Equation 310.15(B) shall apply. The Class 2-LP and Class 3-LP cables shall comply with the following, as applicable: Cables with the suffix \"-LP\" shall be permitted to be installed in bundles, raceways, cable trays, communications raceways, and cable routing assemblies.Cables with the suffix \"-LP\" and a marked current limit shall follow the substitution hierarchy of 722.135(E) for the cable type without the suffix \"-LP\" and without the marked current limit.System design shall be permitted by qualified persons under engineering supervision.Informational Note: An example of the marking on a 23 AWG, 4-pair, Class 2 cable rated 75\u00b0C with an LP current rating of 0.6 amperes per conductor is \"CL2-LP(0.6A) 75\u00b0C 23 AWG 4-pair\". See 722.179(A)(9). [725.144_(B)](https://2023.antflix.net#725.144_(B))", + "displayTitle": "(B) Use of Class 2-LP or Class 3-LP Cables to Transmit Power and Data", + "children": [], + "url": "https://2023.antflix.net#725.144_(B)" + } + ], + "url": "https://2023.antflix.net#725.144" + }, + { + "displayTitle": "Part III Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_98_III" + }, + { + "body": "The listed power source for circuits intended to provide power and data over Class 2 cables to remote equipment shall be as specified in 725.60(A)(1), (A)(2), (A)(3), or (A)(4). In accordance with 725.60(B), the power sources shall not have the output connections paralleled or otherwise interconnected, unless listed for such interconnection. Powered devices connected to a circuit supplying data and power shall be listed. Marking of equipment output connections shall be in accordance with 725.60(C). [725.160](https://2023.antflix.net#725.160)", + "displayTitle": "725.160 Listing and Marking of Equipment for Power and Data Transmission", + "children": [], + "url": "https://2023.antflix.net#725.160" + } + ], + "url": "https://2023.antflix.net#725" + }, + { + "displayTitle": "Article 726 Class 4 Fault-Managed Power Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_115_I" + }, + { + "body": "This article covers the installation of wiring systems and equipment, including utilization equipment, of Class 4 fault-managed power (FMP) systems. Informational Note No. 1: Class 4 fault-managed power systems consist of a Class 4 power transmitter and a Class 4 power receiver connected by a Class 4 cabling system. These systems are characterized by monitoring the circuit for faults and controlling the source current to ensure the energy delivered into any fault is limited. Class 4 systems differ from Class 1, Class 2, and Class 3 systems in that they are not limited for power delivered to an appropriate load. They are current limited for faults between the Class 4 transmitter and Class 4 receiver. Table 725.144 Ampacities of Each Conductor in Amperes in 4-Pair Class 2 or Class 3 Balanced Twisted-Pair Cables Based on Copper Conductors at an Ambient Temperature of 30\u00b0C (86\u00b0F) with All Conductors in All Cables Carrying Current, 60\u00b0C (140\u00b0F), 75\u00b0C (167\u00b0F), and 90\u00b0C (194\u00b0F) Rated Cables AWG Number of 4-Pair Cables in a Bundle 1\u20147 8\u201419 20\u201437 38\u201461 62\u201491 92\u2014192 Temperature Rating Temperature Rating Temperature Rating Temperature Rating Temperature Rating Temperature Rating 60\u00b0C 75\u00b0C 90\u00b0C 60\u00b0C 75\u00b0C 90\u00b0C 60\u00b0C 75\u00b0C 90\u00b0C 60\u00b0C 75\u00b0C 90\u00b0C 60\u00b0C 75\u00b0C 90\u00b0C 60\u00b0C 75\u00b0C 90\u00b0C 26 1.00 1.23 1.42 0.71 0.87 1.02 0.55 0.68 0.78 0.46 0.57 0.67 0.45 0.55 0.64 NA NA NA 24 1.19 1.46 1.69 0.81 1.01 1.17 0.63 0.78 0.91 0.55 0.67 0.78 0.46 0.56 0.65 0.40 0.48 0.55 23 1.24 1.53 1.78 0.89 1.11 1.28 0.77 0.95 1.10 0.66 0.80 0.93 0.58 0.71 0.82 0.45 0.55 0.63 22 1.50 1.86 2.16 1.04 1.28 1.49 0.77 0.95 1.11 0.66 0.82 0.96 0.62 0.77 0.89 0.53 0.63 0.72 Notes: 1. For bundle sizes over 192 cables, or for conductor sizes smaller than 26 AWG, ampacities shall be permitted to be determined by qualified personnel under engineering supervision. 2. Where only half of the conductors in each cable are carrying current, the values in the table shall be permitted to be increased by a factor of 1.4. Informational Note No. 1: Elevated cable temperatures can reduce a cable's data transmission performance. For information on practices for 4-pair balanced twisted pair cabling, see TIA-TSB-184-A and 6.4.7, 6.6.3, and Annex G of ANSI/TIA-568-C.2, which provide guidance on adjustments for operating temperatures between 20\u00b0C and 60\u00b0C. Informational Note No. 2: The per-contact current rating of connectors can limit the maximum allowable current below the ampacity shown in Table 725.144. Informational Note No. 2: The circuits described in this article are characterized by monitoring and control systems that differentiate them from electric light and power circuits; therefore, alternative requirements to those of Chapters 1 through 4 are given. [726.1](https://2023.antflix.net#726.1)", + "displayTitle": "726.1 Scope", + "children": [], + "url": "https://2023.antflix.net#726.1" + }, + { + "body": "The listing and installation of cables for Class 4 circuits shall comply with Article 722. Only those sections of Article 300 referenced in Article 722 shall apply to Class 4 circuits. [726.3](https://2023.antflix.net#726.3)", + "displayTitle": "726.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#726.3" + }, + { + "body": "Class 4 power systems shall be permitted to be used in hazardous (classified) locations where specifically permitted by other articles in this Code. [726.10](https://2023.antflix.net#726.10)", + "displayTitle": "726.10 Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#726.10" + }, + { + "body": "Class 4 power systems shall not be permitted in dwelling units. [726.12](https://2023.antflix.net#726.12)", + "displayTitle": "726.12 Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#726.12" + }, + { + "body": "Class 4 equipment shall be installed in a neat and workmanlike manner. The installation shall also comply with 300.4 and 300.11. [726.24](https://2023.antflix.net#726.24)", + "displayTitle": "726.24 Mechanical Execution of Work", + "children": [], + "url": "https://2023.antflix.net#726.24" + }, + { + "displayTitle": "Part II Class 4 Circuits", + "children": [], + "url": "https://2023.antflix.net#divider_115_II" + }, + { + "body": "The power source shall be a listed Class 4 power transmitter or a listed Class 4 power transmitter as part of a transmitter/receiver system and shall provide the protections in accordance with 726.121(A). Class 4 circuits shall be supplied from a power source (transmitter) that has a voltage output of not more than 450 volts peak or dc. Informational Note No. 1: Informational Note Figure 726.121 illustrates the relationships between Class 4 power transmitters (power sources), Class 4 circuits, Class 4 power receivers, and utilization equipment. Informational Note No. 2: See UL 1400-1, Outline for Fault-Managed Power Systems- Part 1: General Requirements, for information on determining applicable requirements for the listing of Class 4 power systems. [726.121](https://2023.antflix.net#726.121)", + "displayTitle": "726.121 Power Sources for Class 4 Circuits", + "children": [ + { + "body": "For listing purposes, a transmitter shall interrupt an energized circuit when any of the following conditions occur on the circuit between the transmitter and receiver: A short circuitA line-to-line fault condition that presents an unacceptable risk of fire or electric shockA ground-fault condition that presents an unacceptable risk of fire or electric shockAn overcurrent conditionA malfunction of the monitoring or control system that presents an unacceptable risk of fire or electric shockAny other condition that presents an unacceptable risk of fire or electric shockInformational Note: See UL 1400-1, Outline for Fault-Managed Power Systems - Part 1: General Requirements, for information on determining applicable requirements for the listing of Class 4 power systems, including safe operation and limiting the risk of fire and electric shock.Informational Note Figure 726.121 Class 4 Circuits. [726.121_(A)](https://2023.antflix.net#726.121_(A))", + "displayTitle": "(A) Fault Management", + "children": [], + "url": "https://2023.antflix.net#726.121_(A)" + } + ], + "url": "https://2023.antflix.net#726.121" + }, + { + "body": "Outputs of a Class 4 receiver and power outputs of Class 4 utilization equipment shall be considered a separately derived system if the outputs are used as a supply for a feeder or branch circuit. Informational Note: Class 4 utilization equipment that does not provide power outputs is not subject to these requirements. Exception: A Class 4 receiver with limited-power circuit outputs shall be permitted to meet the requirements of Part II of Article 725. [726.122](https://2023.antflix.net#726.122)", + "displayTitle": "726.122 Class 4 Loads", + "children": [], + "url": "https://2023.antflix.net#726.122" + }, + { + "displayTitle": "726.124 Class 4 Marking", + "children": [ + { + "body": "The equipment supplying the Class 4 circuits shall be durably marked where plainly visible to indicate each circuit that is a Class 4 circuit. The marking shall also include the maximum voltage and current output for each connection point. Where multiple connection points have the same rating, a single label shall be permitted to be used. Informational Note: An example of marking is \"Class 4: +/- 190V, 5A\" for a Class 4 transmitter capable of delivering 1.9 kW from 380 volts line to line. [726.124_(A)](https://2023.antflix.net#726.124_(A))", + "displayTitle": "(A) Class 4 Transmitter Marking", + "children": [], + "url": "https://2023.antflix.net#726.124_(A)" + }, + { + "displayTitle": "(B) Class 4 Receiver Marking", + "children": [ + { + "body": "A Class 4 receiver or Class 4 utilization equipment shall be durably marked where plainly visible to indicate each circuit that is a Class 4 circuit. The marking shall include the maximum input voltage and current for each connection point. [726.124_(B)_(1)](https://2023.antflix.net#726.124_(B)_(1))", + "displayTitle": "(1) Class 4 Circuits", + "children": [], + "url": "https://2023.antflix.net#726.124_(B)_(1)" + }, + { + "body": "Where the Class 4 receiver or Class 4 utilization equipment has outputs, terminals, or socket outlets for providing power to other equipment, each output shall be durably marked where plainly visible. The marking shall include the maximum output voltage and current for each connection point. Where multiple connection points have the same rating, a single label shall be permitted to be used. Class 1, Class 2, and Class 3 circuits shall be identified in accordance with 724.30 or Part II of Article 725. [726.124_(B)_(2)](https://2023.antflix.net#726.124_(B)_(2))", + "displayTitle": "(2) Output Terminals and Socket Outlets", + "children": [], + "url": "https://2023.antflix.net#726.124_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#726.124_(B)" + } + ], + "url": "https://2023.antflix.net#726.124" + }, + { + "displayTitle": "726.130 Terminals and Connectors", + "children": [ + { + "body": "Connecting hardware used on Class 4 distribution systems shall be listed. [726.130_(A)](https://2023.antflix.net#726.130_(A))", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#726.130_(A)" + }, + { + "body": "Connectors for Class 4 circuits shall be designed such that they are not interchangeable with non\u2014power-limited sources located on the same premises. [726.130_(B)](https://2023.antflix.net#726.130_(B))", + "displayTitle": "(B) Noninterchangeability", + "children": [], + "url": "https://2023.antflix.net#726.130_(B)" + }, + { + "body": "Any junctions and mating connectors shall be constructed and installed to guard against inadvertent contact with live parts by persons. [726.130_(C)](https://2023.antflix.net#726.130_(C))", + "displayTitle": "(C) Guarding", + "children": [], + "url": "https://2023.antflix.net#726.130_(C)" + } + ], + "url": "https://2023.antflix.net#726.130" + }, + { + "displayTitle": "726.136 Separation From Electric Light, Power, Class 1, Non-Power-Limited Fire Alarm Circuit, and Medium-Power Network-Powered Broadband Communications Cables", + "children": [ + { + "body": "Cables and conductors of Class 4 circuits shall not be placed in any cable, cable tray, compartment, enclosure, manhole, outlet box, device box, raceway, or similar fitting with conductors of electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits unless permitted by 726.136(B) through (H). [726.136_(A)](https://2023.antflix.net#726.136_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#726.136_(A)" + }, + { + "body": "Class 4 circuits shall be permitted to be installed together with the conductors of electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are separated by a barrier. [726.136_(B)](https://2023.antflix.net#726.136_(B))", + "displayTitle": "(B) Separated by Barriers", + "children": [], + "url": "https://2023.antflix.net#726.136_(B)" + }, + { + "body": "In enclosures, Class 4 circuits shall be permitted to be installed in a raceway to separate them from Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits. [726.136_(C)](https://2023.antflix.net#726.136_(C))", + "displayTitle": "(C) Raceways Within Enclosures", + "children": [], + "url": "https://2023.antflix.net#726.136_(C)" + }, + { + "body": "Class 4 circuit conductors in compartments, enclosures, device boxes, outlet boxes, or similar fittings shall be permitted to be installed with electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are introduced solely to connect the equipment connected to Class 4 circuits, and where either of the following applies: The electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors are routed to maintain a minimum of 6 mm (0.25 in.) separation from the conductors and cables of Class 4 circuits.The non-Class 4 circuit conductors operate at 150 volts or less to ground and the Class 4 circuits are installed using Type CL4, Type CL4R, or Type CL4P cables if any CL4 cable conductors extending beyond the jacket are separated by a minimum of 6 mm (0.25 in.) or by a nonconductive sleeve or nonconductive barrier from all other conductors. [726.136_(D)](https://2023.antflix.net#726.136_(D))", + "displayTitle": "(D) Associated Systems Within Enclosures", + "children": [], + "url": "https://2023.antflix.net#726.136_(D)" + }, + { + "body": "Class 4 circuit conductors entering compartments, enclosures, device boxes, outlet boxes, or similar fittings shall be permitted to be installed with Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are introduced solely to connect the equipment connected to Class 4 circuits. Where Class 4 circuit conductors must enter an enclosure that is provided with a single opening, they shall be permitted to enter through a single fitting (such as a tee) if the conductors are separated from the conductors of the other circuits by a continuous and firmly fixed nonconductor, such as flexible tubing. [726.136_(E)](https://2023.antflix.net#726.136_(E))", + "displayTitle": "(E) Enclosures With Single Openings", + "children": [], + "url": "https://2023.antflix.net#726.136_(E)" + }, + { + "body": "Underground Class 4 circuit conductors in a manhole shall be permitted to be installed with Class 1, non-power-limited fire alarm, and medium-power network-powered broadband communications circuits where one of the following conditions is met: The electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors are in a metal-enclosed cable or Type UF cable.The Class 4 circuit conductors are permanently and effectively separated from the conductors of other circuits by a continuous and firmly fixed nonconductor, such as flexible tubing, in addition to the insulation or covering on the wire.The Class 4 circuit conductors are permanently and effectively separated from conductors of the other circuits and securely fastened to racks, insulators, or other approved supports. [726.136_(F)](https://2023.antflix.net#726.136_(F))", + "displayTitle": "(F) Manholes", + "children": [], + "url": "https://2023.antflix.net#726.136_(F)" + }, + { + "body": "Class 4 circuit conductors shall be permitted to be installed in cable trays where the conductors of the electric light. Class 1, and non\u2014power-limited fire alarm circuits are separated by a solid fixed barrier of a material compatible with the cable tray or where the Class 4 circuits are installed in Type MC cable. [726.136_(G)](https://2023.antflix.net#726.136_(G))", + "displayTitle": "(G) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#726.136_(G)" + }, + { + "body": "For other applications, conductors of Class 4 circuits shall be separated by at least 50 mm (2 in.) from conductors of any electric light, power. Class 1, non\u2014power-limited fire alarm, or medium-power network-powered broadband communications circuits unless one of the following conditions is met: Either all of the electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors or all of the Class 4 circuit conductors are in a raceway or in metal-sheathed, metal-clad, non-metallic-sheathed, Type TC, or Type UF cablesAll of the electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors are permanently separated from all of the Class 4 circuit conductors by a continuous and firmly fixed nonconductor, such as porcelain tubes or flexible tubing, in addition to the insulation on the conductors [726.136_(H)](https://2023.antflix.net#726.136_(H))", + "displayTitle": "(H) Other Applications", + "children": [], + "url": "https://2023.antflix.net#726.136_(H)" + } + ], + "url": "https://2023.antflix.net#726.136" + }, + { + "displayTitle": "726.139 Installation of Conductors of Different Circuits in the Same Cable, Enclosure, Cable Tray, Raceway, or Cable Routing Assembly", + "children": [ + { + "body": "Conductors of two or more Class 4 circuits shall be permitted within the same cable, enclosure, raceway, or cable routing assembly. [726.139_(A)](https://2023.antflix.net#726.139_(A))", + "displayTitle": "(A) Two or More Class 4 Circuits", + "children": [], + "url": "https://2023.antflix.net#726.139_(A)" + }, + { + "body": "Conductors of one or more Class 4 circuits shall be permitted within the same cable assembly as conductors of Class 2, Class 3, or communications circuits if the insulation of the Class 2, Class 3, or communications circuit conductors in the cable is at least that required for Class 4 circuits. Class 4 cables shall be permitted within the same enclosure, raceway, or cable routing assembly as Class 2, Class 3, or communications circuits. [726.139_(B)](https://2023.antflix.net#726.139_(B))", + "displayTitle": "(B) Class 4 Circuits With Class 2, Class 3, or Communications Circuits", + "children": [], + "url": "https://2023.antflix.net#726.139_(B)" + }, + { + "body": "Jacketed cables of Class 4 circuits shall be permitted in the same enclosure, cable tray, raceway, or cable routing assembly with jacketed cables of any of the following: Power-limited fire alarm systems in compliance with Parts I and III of Article 760Nonconductive and conductive optical fiber cables in compliance with Parts I and IV of Article 770Communications circuits in compliance with Parts I and IV of Article 805Community antenna television and radio distribution systems in compliance with Parts I and IV of Article 820Low-power, network-powered broadband communications in compliance with Parts I and IV of Article 830 [726.139_(C)](https://2023.antflix.net#726.139_(C))", + "displayTitle": "(C) Class 4 Cables With Other Circuit Cables", + "children": [], + "url": "https://2023.antflix.net#726.139_(C)" + } + ], + "url": "https://2023.antflix.net#726.139" + }, + { + "body": "The ampacity of Class 4 cables shall comply with 300.15 based on the temperature rating of the Class 4 cable for conductors sized 16 AWG to 6 AWG. For conductors sized 24 AWG to 17 AWG, the Class 4 cable shall be rated for the intended ampacity as evidenced by the marking FMP-XXA, where XX is the maximum allowable ampacity permitted. Informational Note No. 1: See 722.179(A) (16) for additional Class 4 cable requirements. Informational Note No. 2: See UL 1400-1, Outline of Investigation for Fault-Managed Power Systems - Part 1: General Requirements, and UL 1400-2, Outline of Fault-Managed Power Systems - Part 2: Requirements for Class 4 Cables, for information on determining maximum allowable ampacities. [726.144](https://2023.antflix.net#726.144)", + "displayTitle": "726.144 Ampacity", + "children": [], + "url": "https://2023.antflix.net#726.144" + }, + { + "displayTitle": "Part III Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_99_III" + }, + { + "body": "The active components of a Class 4 system shall be listed as a Class 4 device. The listing information shall include compatible devices if a listed Class 4 device depends on specific system devices for interoperability, monitoring, or control. Informational Note No. 1: See UL 1400-1, Outline for Fault-Managed Power Systems - Part I: General Requirements, for information on determining applicable requirements for the listing of Class 4 power systems. Informational Note No. 2: An example of a dependent active device in a Class 4 system is a transmitter that relies on a particular receiver or receivers as part of the monitoring and control system. [726.170](https://2023.antflix.net#726.170)", + "displayTitle": "726.170 Listing of Equipment for Class 4 Systems", + "children": [], + "url": "https://2023.antflix.net#726.170" + } + ], + "url": "https://2023.antflix.net#726" + }, + { + "displayTitle": "Article 728 Fire-Resistive Cable Systems", + "children": [ + { + "body": "This article covers the installation of fire-resistive cables, fire-resistive conductors, and other system components used for survivability of critical circuits to ensure continued operation during a specified time under fire conditions as required in this Code. [728.1](https://2023.antflix.net#728.1)", + "displayTitle": "728.1 Scope", + "children": [], + "url": "https://2023.antflix.net#728.1" + }, + { + "body": "Wherever the requirements of other articles of this Code and Article 728 differ, the requirements of Article 728 shall apply. [728.3](https://2023.antflix.net#728.3)", + "displayTitle": "728.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#728.3" + }, + { + "body": "Fire-resistive cables and conductors and their components shall be tested and listed as a complete system, shall be designated for use in a specific system, and shall not be interchangeable between systems. Informational Note: One method of defining the fire rating is by testing the system in accordance with UL 2196, Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables. [728.4](https://2023.antflix.net#728.4)", + "displayTitle": "728.4 General", + "children": [], + "url": "https://2023.antflix.net#728.4" + }, + { + "body": "Fire-resistive cable systems installed outside the fire-rated rooms that they serve, such as the electrical room or the fire pump room, shall comply with the requirements of 728.5(A) through (H) and all other installation instructions provided in the listing. [728.5](https://2023.antflix.net#728.5)", + "displayTitle": "728.5 Installations", + "children": [ + { + "body": "The fire-resistive cable system shall be secured to the building structure in accordance with the listing and the manufacturer's installation instructions. [728.5_(A)](https://2023.antflix.net#728.5_(A))", + "displayTitle": "(A) Mounting", + "children": [], + "url": "https://2023.antflix.net#728.5_(A)" + }, + { + "body": "The fire-resistive cable system shall be supported in accordance with the listing and the manufacturer's installation instructions. Informational Note: The supports are critical for survivability of the system. Each system has its specific support requirements. [728.5_(B)](https://2023.antflix.net#728.5_(B))", + "displayTitle": "(B) Supports", + "children": [], + "url": "https://2023.antflix.net#728.5_(B)" + }, + { + "body": "Where fire-resistive cable is listed to be installed in a raceway, the raceway enclosing the cable, any couplings, and any connectors shall be listed as part of the fire-resistive cable system. The raceway fill for each system shall comply with the listing requirements for the system and shall not be greater than the fill permitted in Chapter 9, Table 1. Informational Note: Raceway fill might not be the same for all listed fire-resistive cable systems. [728.5_(C)](https://2023.antflix.net#728.5_(C))", + "displayTitle": "(C) Raceways and Couplings", + "children": [], + "url": "https://2023.antflix.net#728.5_(C)" + }, + { + "body": "Cable trays used as part of a fire-resistive cable system shall be listed as part of the fire-resistive cable system. [728.5_(D)](https://2023.antflix.net#728.5_(D))", + "displayTitle": "(D) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#728.5_(D)" + }, + { + "body": "Boxes or enclosures used as part of a fire-resistive cable system shall be listed as part of the fire-resistive cable system and shall be secured to the building structure independently of the raceways or cables listed in the system. [728.5_(E)](https://2023.antflix.net#728.5_(E))", + "displayTitle": "(E) Boxes", + "children": [], + "url": "https://2023.antflix.net#728.5_(E)" + }, + { + "body": "Fire-resistive cable installed in a raceway shall only use pulling lubricants listed as part of the fire-resistive cable system. [728.5_(F)](https://2023.antflix.net#728.5_(F))", + "displayTitle": "(F) Pulling Lubricants", + "children": [], + "url": "https://2023.antflix.net#728.5_(F)" + }, + { + "body": "Cables and conductors installed in vertical raceways shall be supported in accordance with the listing of the fire-resistive cable system and in accordance with 300.19. [728.5_(G)](https://2023.antflix.net#728.5_(G))", + "displayTitle": "(G) Vertical Supports", + "children": [], + "url": "https://2023.antflix.net#728.5_(G)" + }, + { + "body": "Only splices that are part of the listing for the fire-resistive cable system shall be used. Splices shall have manufacturer's installation instructions. [728.5_(H)](https://2023.antflix.net#728.5_(H))", + "displayTitle": "(H) Splices", + "children": [], + "url": "https://2023.antflix.net#728.5_(H)" + } + ], + "url": "https://2023.antflix.net#728.5" + }, + { + "body": "Fire-resistive cables installed in a raceway requiring an equipment grounding conductor shall use the same fire-resistive cable described in the system unless alternative equipment grounding conductors are listed with the system. Any alternative equipment grounding conductors shall be marked with the system number. The system shall specify a permissible equipment grounding conductor. If not specified, the equipment grounding conductor shall be the same as the fire-resistive cable described in the system. [728.60](https://2023.antflix.net#728.60)", + "displayTitle": "728.60 Equipment Grounding Conductor", + "children": [], + "url": "https://2023.antflix.net#728.60" + }, + { + "body": "In addition to the marking required in 310.8, system cables and conductors shall be surface marked with the suffix \"FRR\" (fire-resistive rating), along with the circuit integrity duration in hours, and with the system identifier. [728.120](https://2023.antflix.net#728.120)", + "displayTitle": "728.120 Marking", + "children": [], + "url": "https://2023.antflix.net#728.120" + } + ], + "url": "https://2023.antflix.net#728" + }, + { + "displayTitle": "Article 750 Energy Management Systems", + "children": [ + { + "body": "This article applies to the installation and operation of energy management systems. Informational Note: Performance provisions in other codes establish prescriptive requirements that may further restrict the requirements contained in this article. [750.1](https://2023.antflix.net#750.1)", + "displayTitle": "750.1 Scope", + "children": [], + "url": "https://2023.antflix.net#750.1" + }, + { + "body": "Energy management systems shall be one of the following: Listed as a complete energy management systemListed as a kit for field installation in switch or overcurrent device enclosuresListed individual components assembled as a system [750.6](https://2023.antflix.net#750.6)", + "displayTitle": "750.6 Listing", + "children": [], + "url": "https://2023.antflix.net#750.6" + }, + { + "body": "An energy management system shall not override any control necessary to ensure continuity of an alternate power source for the following: Fire pumpsHealth care facilitiesEmergency systemsLegally required standby systemsCritical operations power systems [750.20](https://2023.antflix.net#750.20)", + "displayTitle": "750.20 Alternate Power Sources", + "children": [], + "url": "https://2023.antflix.net#750.20" + }, + { + "body": "Energy management systems shall be permitted to monitor and control electrical loads and sources in accordance with 750.30(A) through (C). [750.30](https://2023.antflix.net#750.30)", + "displayTitle": "750.30 Load Management", + "children": [ + { + "body": "An energy management system shall not override the load shedding controls put in place to ensure the minimum electrical capacity for the following: Fire pumpsEmergency systemsLegally required standby systemsCritical operations power systems [750.30_(A)](https://2023.antflix.net#750.30_(A))", + "displayTitle": "(A) Load Shedding Controls", + "children": [], + "url": "https://2023.antflix.net#750.30_(A)" + }, + { + "body": "An energy management system shall not cause disconnection of power to the following: Elevators, escalators, moving walks, or stairway lift chairsPositive mechanical ventilation for hazardous (classified) locationsVentilation used to exhaust hazardous gas or reclassify an areaCircuits supplying emergency lightingEssential electrical systems in health care facilities [750.30_(B)](https://2023.antflix.net#750.30_(B))", + "displayTitle": "(B) Disconnection of Power", + "children": [], + "url": "https://2023.antflix.net#750.30_(B)" + }, + { + "body": "An energy management system shall not cause a branch circuit, feeder, or service to be overloaded. If an EMS is used to limit the current on a conductor, 750.30(C)(1) through (C)(4) shall apply: [750.30_(C)](https://2023.antflix.net#750.30_(C))", + "displayTitle": "(C) Capacity of Branch Circuit, Feeder, or Service", + "children": [ + { + "body": "A single value equal to the maximum ampere setpoint of the EMS shall be permitted for one or more of the following: For calculating the connected load per 220.70For the maximum source current permitted by EMS control [750.30_(C)_(1)](https://2023.antflix.net#750.30_(C)_(1))", + "displayTitle": "(1) Current Setpoint", + "children": [], + "url": "https://2023.antflix.net#750.30_(C)_(1)" + }, + { + "body": "The EMS shall use monitoring and controls to automatically cease current flow upon malfunction of the EMS. [750.30_(C)_(2)](https://2023.antflix.net#750.30_(C)_(2))", + "displayTitle": "(2) System Malfunction", + "children": [], + "url": "https://2023.antflix.net#750.30_(C)_(2)" + }, + { + "body": "Adjustable settings shall be permitted if access to the settings is accomplished by at least one of the following: Located behind removable and sealable covers over the adjustment meansLocated behind a cover or door that requires the use of a tool to openLocated behind locked doors accessible only to qualified personnelPassword protected with password accessible only to qualified personnelSoftware that has password protected access to the adjusting means accessible to qualified personnel only [750.30_(C)_(3)](https://2023.antflix.net#750.30_(C)_(3))", + "displayTitle": "(3) Settings", + "children": [], + "url": "https://2023.antflix.net#750.30_(C)_(3)" + }, + { + "body": "The equipment that supplies the branch circuit, feeder, or service shall be field marked with the following information: Maximum current settingDate of calculation and settingIdentification of loads and sources associated with the current limiting featureThe following or equivalent wording: \"The setting for the EMS current limiting feature shall not be bypassed\"The markings shall meet the requirements in 110.21(B) and shall be located such that they are clearly visible to qualified persons before examination, adjustment, servicing, or maintenance of the equipment. [750.30_(C)_(4)](https://2023.antflix.net#750.30_(C)_(4))", + "displayTitle": "(4) Marking", + "children": [], + "url": "https://2023.antflix.net#750.30_(C)_(4)" + } + ], + "url": "https://2023.antflix.net#750.30_(C)" + } + ], + "url": "https://2023.antflix.net#750.30" + }, + { + "body": "Where an energy management system is employed to control electrical power through the use of a remote means, a directory identifying the controlled device(s) and circuit(s) shall be posted on the enclosure of the controller. disconnect, or branch-circuit overcurrent device. [750.50](https://2023.antflix.net#750.50)", + "displayTitle": "750.50 Directory", + "children": [], + "url": "https://2023.antflix.net#750.50" + } + ], + "url": "https://2023.antflix.net#750" + }, + { + "displayTitle": "Article 760 Fire Alarm Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_116_I" + }, + { + "body": "This article covers the installation of wiring and equipment of fire alarm systems, including all circuits controlled and powered by the fire alarm system. Informational Note No. 1: Fire alarm systems include fire detection and alarm notification, guard's tour, sprinkler waterflow, and sprinkler supervisory systems. Circuits controlled and powered by the fire alarm system include circuits for the control of building systems safety functions, elevator capture, elevator shutdown, door release, smoke doors and damper control, fire doors and damper control, and fan shutdown, but only where these circuits are powered by and controlled by the fire alarm system. Informational Note No. 2: See NFPA 72, National Fire Alarm and Signaling Code, for further information on the installation and monitoring for integrity requirements for fire alarm systems. [760.1](https://2023.antflix.net#760.1)", + "displayTitle": "760.1 Scope", + "children": [], + "url": "https://2023.antflix.net#760.1" + }, + { + "body": "Circuits and equipment shall comply with 760.3(A) through (O). Only those sections of Article 300 referenced in this article shall apply to fire alarm systems. [760.3](https://2023.antflix.net#760.3)", + "displayTitle": "760.3 Other Articles", + "children": [ + { + "body": "Installation of fire alarm circuits shall comply with 300.21. [760.3_(A)](https://2023.antflix.net#760.3_(A))", + "displayTitle": "(A) Spread of Fire or Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#760.3_(A)" + }, + { + "body": "Power-limited and non-power-limited fire alarm cables installed in ducts, plenums, or other spaces used for environmental air shall comply with 300.22. Exception No. 1: Power-limited fire alarm cables selected in accordance with Table 760.154 and installed in accordance with 722.135 and 300.22(B), Exception, shall be permitted to be installed in ducts specifically fabricated for environmental air. Exception No. 2: Power-limited fire alarm cables selected in accordance with Table 760.154 and installed in accordance with 722.135 shall be permitted to be installed in other spaces used for environmental air (plenums). [760.3_(B)](https://2023.antflix.net#760.3_(B))", + "displayTitle": "(B) Ducts, Plenums, and Other Air-Handling Spaces", + "children": [], + "url": "https://2023.antflix.net#760.3_(B)" + }, + { + "body": "Fire alarm circuits and equipment installed in corrosive, damp, or wet locations shall comply with 110.11, 300.5(B), 300.6, 300.9, and 310.10(F). [760.3_(C)](https://2023.antflix.net#760.3_(C))", + "displayTitle": "(C) Corrosive, Damp, or Wet Locations", + "children": [], + "url": "https://2023.antflix.net#760.3_(C)" + }, + { + "body": "Building control systems (e.g., elevator capture, fan shutdown) associated with the fire alarm system shall comply with Article 725. [760.3_(D)](https://2023.antflix.net#760.3_(D))", + "displayTitle": "(D) Building Control Circuits", + "children": [], + "url": "https://2023.antflix.net#760.3_(D)" + }, + { + "body": "Where optical fiber cables are utilized for fire alarm circuits, the cables shall be installed in accordance with Article 770. [760.3_(E)](https://2023.antflix.net#760.3_(E))", + "displayTitle": "(E) Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#760.3_(E)" + }, + { + "body": "Installations shall comply with 300.8. [760.3_(F)](https://2023.antflix.net#760.3_(F))", + "displayTitle": "(F) Installation of Conductors With Other Systems", + "children": [], + "url": "https://2023.antflix.net#760.3_(F)" + }, + { + "body": "Installations shall comply with 300.7(A). [760.3_(G)](https://2023.antflix.net#760.3_(G))", + "displayTitle": "(G) Raceways or Sleeves Exposed to Different Temperatures", + "children": [], + "url": "https://2023.antflix.net#760.3_(G)" + }, + { + "body": "Vertical installations of circuit integrity (CI) cables and conductors installed in a raceway or conductors and cables of fire-resistive cable systems shall be installed in accordance with 300.19. [760.3_(H)](https://2023.antflix.net#760.3_(H))", + "displayTitle": "(H) Vertical Support for Fire-Resistive Cables and Conductors", + "children": [], + "url": "https://2023.antflix.net#760.3_(H)" + }, + { + "body": "The number and size of cables and conductors shall comply with 300.17. [760.3_(I)](https://2023.antflix.net#760.3_(I))", + "displayTitle": "(I) Installation of Cables and Conductors in Raceway", + "children": [], + "url": "https://2023.antflix.net#760.3_(I)" + }, + { + "body": "A bushing shall be installed where cables emerge from raceway used for mechanical support or protection in accordance with 300.15(C). [760.3_(J)](https://2023.antflix.net#760.3_(J))", + "displayTitle": "(J) Bushing", + "children": [], + "url": "https://2023.antflix.net#760.3_(J)" + }, + { + "body": "Power-limited fire alarm cables shall be permitted to be installed in plenum cable routing assemblies, riser cable routing assemblies, and general-purpose cable routing assemblies selected in accordance with Table 800.154(c), listed in accordance with 800.182, and installed in accordance with 800.110(C) and 800.113. [760.3_(K)](https://2023.antflix.net#760.3_(K))", + "displayTitle": "(K) Cable Routing Assemblies", + "children": [], + "url": "https://2023.antflix.net#760.3_(K)" + }, + { + "body": "Power-limited fire alarm cables shall be permitted to be installed in plenum communications raceways, riser communications raceways, and general-purpose communications raceways selected in accordance with Table 800.154(b), listed in accordance with 800.182, and installed in accordance with 800.113 and 362.24 through 362.56, where the requirements applicable to electrical nonmetallic tubing apply. [760.3_(L)](https://2023.antflix.net#760.3_(L))", + "displayTitle": "(L) Communications Raceways", + "children": [], + "url": "https://2023.antflix.net#760.3_(L)" + }, + { + "body": "The requirements of 310.14(A)(3) on the temperature limitation of conductors shall apply to power-limited fire alarm cables and non\u2014power-limited fire alarms cables. [760.3_(M)](https://2023.antflix.net#760.3_(M))", + "displayTitle": "(M) Temperature Limitations of Power-Limited and Non-Power-Limited Fire Alarm Cables", + "children": [], + "url": "https://2023.antflix.net#760.3_(M)" + }, + { + "body": "Equipment grounding conductors shall be identified in accordance with 250.119. Exception: Conductors with green insulation shall be permitted to be used as ungrounded signal conductors for Types FPLP, FPLR, FPL, and substitute cables installed in accordance with 760.154(A). [760.3_(N)](https://2023.antflix.net#760.3_(N))", + "displayTitle": "(N) Identification of Equipment Grounding Conductors", + "children": [], + "url": "https://2023.antflix.net#760.3_(N)" + }, + { + "body": "The listing and installation of cables for power-limited fire alarm circuits shall comply with Part III of this article and Parts I and II of Article 722. [760.3_(O)](https://2023.antflix.net#760.3_(O))", + "displayTitle": "(O) Cables for Power-Limited Fire Alarm (PLFA) Circuits", + "children": [], + "url": "https://2023.antflix.net#760.3_(O)" + } + ], + "url": "https://2023.antflix.net#760.3" + }, + { + "body": "Cables and equipment shall be permitted to be used in hazardous (classified) locations where specifically permitted by other articles in this Code. [760.10](https://2023.antflix.net#760.10)", + "displayTitle": "760.10 Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#760.10" + }, + { + "body": "Access to electrical equipment shall not be denied by an accumulation of conductors and cables that prevents removal of panels, including suspended ceiling panels. [760.21](https://2023.antflix.net#760.21)", + "displayTitle": "760.21 Access to Electrical Equipment Behind Panels Designed to Allow Access", + "children": [], + "url": "https://2023.antflix.net#760.21" + }, + { + "displayTitle": "760.24 Mechanical Execution of Work", + "children": [ + { + "body": "Fire alarm circuits shall be installed in a neat and workmanlike manner. Cables and conductors installed exposed on the surface of ceilings and sidewalls shall be supported by the building structure in such a manner that the cable will not be damaged by normal building use. Such cables shall be supported by hardware, including straps, staples, hangers, listed cable ties identified for securement and support, or similar fittings designed and installed so as not to damage the cable. The installation shall also comply with 300.4 and 300.11. Informational Note: Paint, plaster, cleaners, abrasives, corrosive residues, or other contaminants might result in an undetermined alteration of PLFA and NPLFA cable properties. [760.24_(A)](https://2023.antflix.net#760.24_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#760.24_(A)" + }, + { + "body": "Circuit integrity (CI) cables shall be supported at a distance not exceeding 610 mm (24 in.). Where located within 2.1 m (7 ft) of the floor in accordance with 760.53(A)(1) and 760.130(B)(1), as applicable, the cable shall be fastened in an approved manner at intervals of not more than 450 mm (18 in.). Cable supports and fasteners shall be steel. [760.24_(B)](https://2023.antflix.net#760.24_(B))", + "displayTitle": "(B) Circuit Integrity (CI) Cable", + "children": [], + "url": "https://2023.antflix.net#760.24_(B)" + } + ], + "url": "https://2023.antflix.net#760.24" + }, + { + "body": "The accessible portion of abandoned fire alarm cables shall be removed. Where cables are identified for future use with a tag, the tag shall be of sufficient durability to withstand the environment involved. [760.25](https://2023.antflix.net#760.25)", + "displayTitle": "760.25 Abandoned Cables", + "children": [], + "url": "https://2023.antflix.net#760.25" + }, + { + "body": "Fire alarm circuits shall be identified at terminal and junction locations in a manner that helps to prevent unintentional signals on fire alarm system circuit(s) during testing and servicing of other systems. [760.30](https://2023.antflix.net#760.30)", + "displayTitle": "760.30 Fire Alarm Circuit Identification", + "children": [], + "url": "https://2023.antflix.net#760.30" + }, + { + "body": "Non-power-limited fire alarm circuits and power-limited fire alarm circuits that extend beyond one building and run outdoors shall meet the installation requirements of Parts II, III, and IV of Article 805 and shall meet the installation requirements of Part I of Article 300. [760.32](https://2023.antflix.net#760.32)", + "displayTitle": "760.32 Fire Alarm Circuits Extending Beyond One Building", + "children": [], + "url": "https://2023.antflix.net#760.32" + }, + { + "body": "A listed surge-protective device (SPD) shall be installed on the supply side of a fire alarm control panel in accordance with Part II of Article 242. [760.33](https://2023.antflix.net#760.33)", + "displayTitle": "760.33 Supply-Side Overvoltage Protection", + "children": [], + "url": "https://2023.antflix.net#760.33" + }, + { + "body": "Fire alarm circuits shall comply with 760.35(A) and (B). [760.35](https://2023.antflix.net#760.35)", + "displayTitle": "760.35 Fire Alarm Circuit Requirements", + "children": [ + { + "body": "See Parts I and II. [760.35_(A)](https://2023.antflix.net#760.35_(A))", + "displayTitle": "(A) Non-Power-Limited Fire Alarm (NPLFA) Circuits", + "children": [], + "url": "https://2023.antflix.net#760.35_(A)" + }, + { + "body": "See Parts I and III. [760.35_(B)](https://2023.antflix.net#760.35_(B))", + "displayTitle": "(B) Power-Limited Fire Alarm (PLFA) Circuits", + "children": [], + "url": "https://2023.antflix.net#760.35_(B)" + } + ], + "url": "https://2023.antflix.net#760.35" + }, + { + "displayTitle": "Part II Non-Power-Limited Fire Alarm (NPLFA) Circuits", + "children": [], + "url": "https://2023.antflix.net#divider_116_II" + }, + { + "displayTitle": "760.41 NPLFA Circuit Power Source Requirements", + "children": [ + { + "body": "The power source of non\u2014power-limited fire alarm circuits shall comply with Chapters 1 through 4, and the output voltage shall be not more than 600 volts, nominal. The fire alarm circuit disconnect shall be permitted to be secured in the \"on\" position. [760.41_(A)](https://2023.antflix.net#760.41_(A))", + "displayTitle": "(A) Power Source", + "children": [], + "url": "https://2023.antflix.net#760.41_(A)" + }, + { + "body": "The branch circuit supplying the fire alarm equipment(s) shall supply no other loads. The location of the branch-circuit overcurrent protective device shall be permanently identified at the fire alarm control unit. The circuit disconnecting means shall have red identification, shall be accessible only to qualified personnel, and shall be identified as \"FIRE ALARM CIRCUIT.\" The red identification shall not damage the overcurrent protective devices or obscure the manufacturer's markings. This branch circuit shall not be supplied through ground-fault circuit interrupters or arc-fault circuit-interrupters. [760.41_(B)](https://2023.antflix.net#760.41_(B))", + "displayTitle": "(B) Branch Circuit", + "children": [], + "url": "https://2023.antflix.net#760.41_(B)" + } + ], + "url": "https://2023.antflix.net#760.41" + }, + { + "body": "Overcurrent protection for conductors 14 AWG and larger shall be provided in accordance with the conductor ampacity without applying the ampacity adjustment and correction factors of 310.14 to the ampacity calculation. Overcurrent protection shall not exceed 7 amperes for 18 AWG conductors and 10 amperes for 16 AWG conductors. Exception: Where other articles of this Code permit or require other overcurrent protection. [760.43](https://2023.antflix.net#760.43)", + "displayTitle": "760.43 NPLFA Circuit Overcurrent Protection", + "children": [], + "url": "https://2023.antflix.net#760.43" + }, + { + "body": "Overcurrent devices shall be located at the point where the conductor to be protected receives its supply. Exception No. 1: Where the overcurrent device protecting the larger conductor also protects the smaller conductor. Exception No. 2: Transformer secondary conductors. Non-power-limited fire alarm circuit conductors supplied by the secondary of a single-phase transformer that has only a 2-wire (single-voltage) secondary shall be permitted to be protected by overcurrent protection provided by the primary (supply) side of the transformer, provided the protection is in accordance with 450.3 and does not exceed the value determined by multiplying the secondary conductor ampacity by the secondary-to-primary transformer voltage ratio. Transformer secondary conductors other than 2-wire shall not be considered to be protected by the primary overcurrent protection. Exception No. 3: Electronic power source output conductors. Non\u2014power-limited circuit conductors supplied by the output of a single-phase, listed electronic power source, other than a transformer, having only a 2-wire (single-voltage) output for connection to non\u2014power-limited circuits shall be permitted to be protected by overcurrent protection provided on the input side of the electronic power source, provided this protection does not exceed the value determined by multiplying the non\u2014power-limited circuit conductor ampacity by the output-to-input voltage ratio. Electronic power source outputs, other than 2-wire (single voltage), connected to non\u2014power-limited circuits shall not be considered to be protected by overcurrent protection on the input of the electronic power source. Informational Note: A single-phase, listed electronic power supply whose output supplies a 2-wire (single-voltage) circuit is an example of a non\u2014power-limited power source that meets the requirements of 760.41. [760.45](https://2023.antflix.net#760.45)", + "displayTitle": "760.45 NPLFA Circuit Overcurrent Device Location", + "children": [], + "url": "https://2023.antflix.net#760.45" + }, + { + "body": "Installation of non\u2014power-limited fire alarm circuits shall be in accordance with 110.3(B), 300.7, 300.11, 300.15, 300.17, 300.19(B), and other appropriate articles of Chapter 3. Exception No. 1: As provided in 760.48 through 760.53. Exception No. 2: Where other articles of this Code require other methods. [760.46](https://2023.antflix.net#760.46)", + "displayTitle": "760.46 NPLFA Circuit Wiring", + "children": [], + "url": "https://2023.antflix.net#760.46" + }, + { + "displayTitle": "760.48 Conductors of Different Circuits in Same Cable, Enclosure, or Raceway", + "children": [ + { + "body": "Class 1 and non\u2014power-limited fire alarm circuits shall be permitted to occupy the same cable, enclosure, or raceway without regard to whether the individual circuits are alternating current or direct current, provided all conductors are insulated for the maximum voltage of any conductor in the enclosure or raceway. [760.48_(A)](https://2023.antflix.net#760.48_(A))", + "displayTitle": "(A) Class 1 With NPLFA Circuits", + "children": [], + "url": "https://2023.antflix.net#760.48_(A)" + }, + { + "body": "Power-supply and fire alarm circuit conductors shall be permitted in the same cable, enclosure, or raceway only where connected to the same equipment. [760.48_(B)](https://2023.antflix.net#760.48_(B))", + "displayTitle": "(B) Fire Alarm With Power-Supply Circuits", + "children": [], + "url": "https://2023.antflix.net#760.48_(B)" + } + ], + "url": "https://2023.antflix.net#760.48" + }, + { + "displayTitle": "760.49 NPLFA Circuit Conductors", + "children": [ + { + "body": "Only copper conductors shall be permitted to be used for fire alarm systems. Size 18 AWG and 16 AWG conductors shall be permitted to be used, provided they supply loads that do not exceed the ampacities given in Table 402.5 and are installed in a raceway, an approved enclosure, or a listed cable. Conductors larger than 16 AWG shall not supply loads greater than the ampacities given in 310.14, as applicable. [760.49_(A)](https://2023.antflix.net#760.49_(A))", + "displayTitle": "(A) Sizes and Use", + "children": [], + "url": "https://2023.antflix.net#760.49_(A)" + }, + { + "body": "Insulation on conductors shall be rated for the system voltage and not less than 600 volts. Conductors larger than 16 AWG shall comply with Article 310. Conductors 18 AWG and 16 AWG shall be Type KF-2, KFF-2, PAFF, PTFF, PF, PFF, PGF, PGFF, RFH-2, RFHH-2, RFHH-3, SF-2, SFF-2, TF, TFF, TFN, TFFN, ZF, or ZFF. Conductors with other types and thickness of insulation shall be permitted if listed for non\u2014power-limited fire alarm circuit use. Informational Note: See Table 402.3 for application provisions. [760.49_(B)](https://2023.antflix.net#760.49_(B))", + "displayTitle": "(B) Insulation", + "children": [], + "url": "https://2023.antflix.net#760.49_(B)" + }, + { + "body": "Conductors shall be solid or stranded copper. Exception to (B) and (C): Wire Types PAF and PTF shall be permitted only for high-temperature applications between 90\u00b0C (194\u00b0F) and 250\u00b0C (482\u00b0F). [760.49_(C)](https://2023.antflix.net#760.49_(C))", + "displayTitle": "(C) Conductor Materials", + "children": [], + "url": "https://2023.antflix.net#760.49_(C)" + } + ], + "url": "https://2023.antflix.net#760.49" + }, + { + "displayTitle": "760.51 Number of Conductors in Cable Trays and Raceways, and Ampacity Adjustment Factors", + "children": [ + { + "body": "Where only non-power-limited fire alarm circuit and Class 1 circuit conductors are in a raceway, the number of conductors shall be determined in accordance with 300.17. The ampacity adjustment factors given in 310.15(C)(1) shall apply if such conductors carry continuous load in excess of 10 percent of the ampacity of each conductor. [760.51_(A)](https://2023.antflix.net#760.51_(A))", + "displayTitle": "(A) NPLFA Circuits and Class 1 Circuits", + "children": [], + "url": "https://2023.antflix.net#760.51_(A)" + }, + { + "body": "Where power-supply conductors and non\u2014power-limited fire alarm circuit conductors are permitted in a raceway in accordance with 760.48, the number of conductors shall be determined in accordance with 300.17. The ampacity adjustment factors given in 310.15(C)(1) shall apply as follows: To all conductors where the fire alarm circuit conductors carry continuous loads in excess of 10 percent of the ampacity of each conductor and where the total number of conductors is more than threeTo the power-supply conductors only, where the fire alarm circuit conductors do not carry continuous loads in excess of 10 percent of the ampacity of each conductor and where the number of power-supply conductors is more than three [760.51_(B)](https://2023.antflix.net#760.51_(B))", + "displayTitle": "(B) Power-Supply Conductors and NPLFA Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#760.51_(B)" + }, + { + "body": "Where fire alarm circuit conductors are installed in cable trays, they shall comply with 392.22 and 392.80(A). [760.51_(C)](https://2023.antflix.net#760.51_(C))", + "displayTitle": "(C) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#760.51_(C)" + } + ], + "url": "https://2023.antflix.net#760.51" + }, + { + "body": "Multiconductor non-power-limited fire alarm cables that meet the requirements of 760.176 shall be permitted to be used on fire alarm circuits operating at 150 volts or less and shall be installed in accordance with 760.53(A) and (B). [760.53](https://2023.antflix.net#760.53)", + "displayTitle": "760.53 Multiconductor NPLFA Cables", + "children": [ + { + "body": "Multiconductor non-power-limited fire alarm circuit cables shall be installed in accordance with 760.53(A)(1), (A)(2), and (A)(3). [760.53_(A)](https://2023.antflix.net#760.53_(A))", + "displayTitle": "(A) NPLFA Wiring Method", + "children": [ + { + "body": "Cable splices or terminations shall be made in listed fittings, boxes, enclosures, fire alarm devices, or utilization equipment. Where installed exposed, cables shall be adequately supported and installed in such a way that maximum protection against physical damage is afforded by building construction such as baseboards, door frames, ledges, and so forth. Where located within 2.1 m (7 ft) of the floor, cables shall be securely fastened in an approved manner at intervals of not more than 450 mm (18 in.). [760.53_(A)_(1)](https://2023.antflix.net#760.53_(A)_(1))", + "displayTitle": "(1) In Raceways, Exposed on Ceilings or Sidewalls, or Fished in Concealed Spaces", + "children": [], + "url": "https://2023.antflix.net#760.53_(A)_(1)" + }, + { + "body": "Cables shall be installed in metal raceway or rigid nonmetallic conduit where passing through a floor or wall to a height of 2.1 m (7 ft) above the floor, unless adequate protection can be afforded by building construction such as detailed in 760.53(A)(1), or unless an equivalent solid guard is provided. [760.53_(A)_(2)](https://2023.antflix.net#760.53_(A)_(2))", + "displayTitle": "(2) Passing Through a Floor or Wall", + "children": [], + "url": "https://2023.antflix.net#760.53_(A)_(2)" + }, + { + "body": "Cables shall be installed in rigid metal conduit, rigid nonmetallic conduit, intermediate metal conduit, liquidtight flexible nonmetallic conduit, or electrical metallic tubing where installed in hoistways. Exception: As provided for in 620.21 for elevators and similar equipment. [760.53_(A)_(3)](https://2023.antflix.net#760.53_(A)_(3))", + "displayTitle": "(3) In Hoistways", + "children": [], + "url": "https://2023.antflix.net#760.53_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#760.53_(A)" + }, + { + "body": "The use of non-power-limited fire alarm circuit cables shall comply with 760.53(B)(1) through (B)(4). [760.53_(B)](https://2023.antflix.net#760.53_(B))", + "displayTitle": "(B) Applications of Listed NPLFA Cables", + "children": [ + { + "body": "Multiconductor non\u2014power-limited fire alarm circuit cables, Types NPLFP, NPLFR, and NPLF, shall not be installed exposed in ducts specifically fabricated for environmental air. Informational Note: See 300.22(B). [760.53_(B)_(1)](https://2023.antflix.net#760.53_(B)_(1))", + "displayTitle": "(1) Ducts Specifically Fabricated for Environmental Air", + "children": [], + "url": "https://2023.antflix.net#760.53_(B)_(1)" + }, + { + "body": "Cables installed in other spaces used for environmental air shall be Type NPLFP. Exception No. 1: Types NPLFR and NPLF cables installed in compliance with 300.22( C). Exception No. 2: Other wiring methods in accordance with 300.22(C) and conductors in compliance with 760.49(C). Exception No. 3: Type NPLFP-CI cable shall be permitted to be installed to provide a 2-hour circuit integrity rated cable. [760.53_(B)_(2)](https://2023.antflix.net#760.53_(B)_(2))", + "displayTitle": "(2) Other Spaces Used for Environmental Air (Plenums)", + "children": [], + "url": "https://2023.antflix.net#760.53_(B)_(2)" + }, + { + "body": "Cables installed in vertical runs and penetrating one or more floors, or cables installed in vertical runs in a shaft, shall be Type NPLFR. Floor penetrations requiring Type NPLFR shall contain only cables suitable for riser or plenum use. Exception No. 1: Type NPLF or other cables that are specified in Chapter 3 and are in compliance with 760.49(C) and encased in metal raceway. Exception No. 2: Type NPLF cables located in a fireproof shaft having firestops at each floor. Informational Note: See 300.21 for firestop requirements for floor penetrations. Exception No. 3: Type NPLF-CI cable shall be permitted to be installed to provide a 2-hour circuit integrity rated cable. [760.53_(B)_(3)](https://2023.antflix.net#760.53_(B)_(3))", + "displayTitle": "(3) Riser", + "children": [], + "url": "https://2023.antflix.net#760.53_(B)_(3)" + }, + { + "body": "Cables installed in building locations other than the locations covered in 760.53(B)(1), (B)(2), and (B)(3) shall be Type NPLF. Exception No. 1: Chapter 3 wiring methods with conductors in compliance with 760.49(C). Exception No. 2: Type NPLFP or Type NPLFR cables shall be permitted. Exception No. 3: Type NPLFR-CI cable shall be permitted to be installed to provide a 2-hour circuit integrity rated cable. [760.53_(B)_(4)](https://2023.antflix.net#760.53_(B)_(4))", + "displayTitle": "(4) Other Wiring Within Buildings", + "children": [], + "url": "https://2023.antflix.net#760.53_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#760.53_(B)" + } + ], + "url": "https://2023.antflix.net#760.53" + }, + { + "displayTitle": "Part III Power-Limited Fire Alarm (PLFA) Circuits", + "children": [], + "url": "https://2023.antflix.net#divider_100_III" + }, + { + "displayTitle": "760.121 Power Sources for PLFA Circuits", + "children": [ + { + "body": "The power source for a power-limited fire alarm circuit shall be as specified in the following: Informational Note No. 1: See Chapter 9, Tables 12(A) and 12(B), for the listing requirements for power-limited fire alarm circuit sources.A listed PLFA or Class 3 transformerA listed PLFA or Class 3 power supplyListed equipment marked to identify the PLFA power sourceInformational Note No. 2: Examples of listed equipment are a fire alarm control panel with integral power source; a circuit card listed for use as a PLFA source, where used as part of a listed assembly; a current-limiting impedance, listed for the purpose or part of a listed product, used in conjunction with a non\u2014power-limited transformer or a stored energy source, for example, storage battery, to limit the output current. [760.121_(A)](https://2023.antflix.net#760.121_(A))", + "displayTitle": "(A) Power Source", + "children": [], + "url": "https://2023.antflix.net#760.121_(A)" + }, + { + "body": "The branch circuit supplying the fire alarm equipment(s) shall comply with the following requirements: The branch circuit shall supply no other loads.The branch circuit shall not be supplied through ground-fault circuit interrupters or arc-fault circuit interrupters.The location of the branch-circuit overcurrent protective device shall be permanently identified at the fire alarm control unit.The circuit disconnecting means shall have red identification, shall be accessible only to qualified personnel, and shall be identified with the following words: \"FIRE ALARM CIRCUIT.\" The red identification shall not damage the overcurrent protective devices or obscure the manufacturer's markings.The fire alarm branch-circuit disconnecting means shall be permitted to be secured in the \"on\" position.Informational Note: See 210.8(A)(5), Exception, for requirements on receptacles in dwelling-unit unfinished basements that supply power for fire alarm systems. [760.121_(B)](https://2023.antflix.net#760.121_(B))", + "displayTitle": "(B) Branch Circuit", + "children": [], + "url": "https://2023.antflix.net#760.121_(B)" + } + ], + "url": "https://2023.antflix.net#760.121" + }, + { + "body": "The equipment supplying PLFA circuits shall be durably marked where plainly visible to indicate each circuit that is a power-limited fire alarm circuit. [760.124](https://2023.antflix.net#760.124)", + "displayTitle": "760.124 Circuit Marking", + "children": [], + "url": "https://2023.antflix.net#760.124" + }, + { + "body": "Conductors and equipment on the supply side of the power source shall be installed in accordance with the appropriate requirements of Part II and Chapters 1 through 4. Transformers or other devices supplied from power-supply conductors shall be protected by an overcurrent device rated not over 20 amperes. Exception: The input leads of a transformer or other power source supplying power-limited fire alarm circuits shall be permitted to be smaller than 14 AWG, but not smaller than 18 AWG, if they are not over 300 mm (12 in.) long and if they have insulation that complies with 760.49(B). [760.127](https://2023.antflix.net#760.127)", + "displayTitle": "760.127 Wiring Methods on Supply Side of the PLFA Power Source", + "children": [], + "url": "https://2023.antflix.net#760.127" + }, + { + "body": "Fire alarm circuits on the load side of the power source shall be permitted to be installed using wiring methods and materials in accordance with 760.130(A), (B), or a combination of both. Parts I and II of Article 722 shall apply. [760.130](https://2023.antflix.net#760.130)", + "displayTitle": "760.130 Wiring Methods and Materials on Load Side of the PLFA Power Source", + "children": [ + { + "body": "NPLFA wiring methods shall be permitted when used in accordance with 760.46, 760.49, or 760.53 for PLFA circuits. Conductors shall be solid or stranded copper. Separation from electric light, power, Class 1, non\u2014power-limited fire alarm circuit conductors, and medium-power network-powered broadband communications cables shall comply with 760.136. Exception: The ampacity adjustment factors specified in 310.15(C)(1) shall not apply. [760.130_(A)](https://2023.antflix.net#760.130_(A))", + "displayTitle": "(A) NPLFA Wiring Methods and Materials", + "children": [], + "url": "https://2023.antflix.net#760.130_(A)" + }, + { + "body": "Power-limited fire alarm conductors and cables described in 722.179 shall be installed as detailed in 722.135 and 760.130(B)(1) through (B)(4). Devices shall be installed in accordance with 110.3(B), 300.1 1(A), and 300.15. [760.130_(B)](https://2023.antflix.net#760.130_(B))", + "displayTitle": "(B) PLFA Wiring Methods and Materials", + "children": [ + { + "body": "Cable splices or terminations shall be made in listed fittings, boxes, enclosures, fire alarm devices, or utilization equipment. Where installed exposed, cables shall be adequately supported and installed such that maximum protection against physical damage is afforded by building construction such as baseboards, door frames, ledges, and so forth. Where located within 2.1 m (7 ft) of the floor, cables shall be securely fastened in an approved manner at intervals of not more than 450 mm (18 in.). [760.130_(B)_(1)](https://2023.antflix.net#760.130_(B)_(1))", + "displayTitle": "(1) In Raceways, Exposed on Ceilings or Sidewalls, or Fished in Concealed Spaces", + "children": [], + "url": "https://2023.antflix.net#760.130_(B)_(1)" + }, + { + "body": "Cables shall be installed in metal raceways or rigid nonmetallic conduit where passing through a floor or wall to a height of 2.1 m (7 ft) above the floor, unless adequate protection can be afforded by building construction such as detailed in 760.130(B)(1) or unless an equivalent solid guard is provided. [760.130_(B)_(2)](https://2023.antflix.net#760.130_(B)_(2))", + "displayTitle": "(2) Passing Through a Floor or Wall", + "children": [], + "url": "https://2023.antflix.net#760.130_(B)_(2)" + }, + { + "body": "Cables specified in Chapter 3 and meeting the requirements of 722.179(A)(15)(a) and (A)(15) (b) shall be permitted to be installed in nonconcealed spaces where the exposed length of cable does not exceed 3 m (10 ft). [760.130_(B)_(3)](https://2023.antflix.net#760.130_(B)_(3))", + "displayTitle": "(3) Nonconcealed Spaces", + "children": [], + "url": "https://2023.antflix.net#760.130_(B)_(3)" + }, + { + "body": "A portable fire alarm system provided to protect a stage or set when not in use shall be permitted to use wiring methods in accordance with 530.12. [760.130_(B)_(4)](https://2023.antflix.net#760.130_(B)_(4))", + "displayTitle": "(4) Portable Fire Alarm Systems", + "children": [], + "url": "https://2023.antflix.net#760.130_(B)_(4)" + } + ], + "url": "https://2023.antflix.net#760.130_(B)" + } + ], + "url": "https://2023.antflix.net#760.130" + }, + { + "body": "Conductors and equipment for power-limited fire alarm circuits shall be installed in accordance with Parts I and II of Article 722 and 760.136 through 760.143. [760.133](https://2023.antflix.net#760.133)", + "displayTitle": "760.133 Installation of Conductors and Equipment in Cables, Compartments, Cable Trays, Enclosures, Manholes, Outlet Boxes, Device Boxes, Raceways, and Cable Routing Assemblies for Power-Limited Fire Alarm Circuits", + "children": [], + "url": "https://2023.antflix.net#760.133" + }, + { + "displayTitle": "760.136 Separation From Electric Light, Power, Class 1, NPLFA, and Medium-Power Network-Powered Broadband Communications Circuit Conductors", + "children": [ + { + "body": "Power-limited fire alarm circuit cables and conductors shall not be placed in any cable, cable tray, compartment, enclosure, manhole, outlet box, device box, raceway, or similar fitting with conductors of electric light, power, Class 1, non\u2014power-limited fire alarm circuits, and medium-power network-powered broadband communications circuits unless permitted by 760.136(B) through (G). [760.136_(A)](https://2023.antflix.net#760.136_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#760.136_(A)" + }, + { + "body": "Power-limited fire alarm circuit cables shall be permitted to be installed together with Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are separated by a barrier. [760.136_(B)](https://2023.antflix.net#760.136_(B))", + "displayTitle": "(B) Separated by Barriers", + "children": [], + "url": "https://2023.antflix.net#760.136_(B)" + }, + { + "body": "In enclosures, power-limited fire alarm circuits shall be permitted to be installed in a raceway within the enclosure to separate them from Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits. [760.136_(C)](https://2023.antflix.net#760.136_(C))", + "displayTitle": "(C) Raceways Within Enclosures", + "children": [], + "url": "https://2023.antflix.net#760.136_(C)" + }, + { + "body": "Power-limited fire alarm conductors in compartments, enclosures, device boxes, outlet boxes, or similar fittings shall be permitted to be installed with electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are introduced solely to connect the equipment connected to power-limited fire alarm circuits, and shall comply with either of the following conditions: The electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors are routed to maintain a minimum of 6 mm (1/4 in.) separation from the conductors and cables of power-limited fire alarm circuits.The circuit conductors operate at 150 volts or less to ground and also comply with one of the following conditions:The fire alarm power-limited circuits are installed using Type FPL. Type FPLR, Type FPLP, or permitted substitute cables if these power-limited cable conductors extending beyond the jacket are separated by a minimum of 6 mm (1/4 in.) or by a nonconductive sleeve or nonconductive barrier from all other conductors.The power-limited fire alarm circuit conductors are installed as non\u2014power-limited circuits in accordance with 760.46. [760.136_(D)](https://2023.antflix.net#760.136_(D))", + "displayTitle": "(D) Associated Systems Within Enclosures", + "children": [], + "url": "https://2023.antflix.net#760.136_(D)" + }, + { + "body": "Power-limited fire alarm circuit conductors entering compartments, enclosures, device boxes, outlet boxes, or similar fittings shall be permitted to be installed with electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are introduced solely to connect the equipment connected to power-limited fire alarm circuits or to other circuits controlled by the fire alarm system to which the other conductors in the enclosure are connected. Where power-limited fire alarm circuit conductors must enter an enclosure that is provided with a single opening, they shall be permitted to enter through a single fitting (such as a tee), provided the conductors are separated from the conductors of the other circuits by a continuous and firmly fixed nonconductor, such as flexible tubing. [760.136_(E)](https://2023.antflix.net#760.136_(E))", + "displayTitle": "(E) Enclosures With Single Opening", + "children": [], + "url": "https://2023.antflix.net#760.136_(E)" + }, + { + "body": "In hoistways, power-limited fire alarm circuit conductors shall be installed in rigid metal conduit, rigid nonmetallic conduit, intermediate metal conduit, liquidtight flexible nonmetallic conduit, or electrical metallic tubing. For elevators or similar equipment, these conductors shall be permitted to be installed as provided in 620.21. [760.136_(F)](https://2023.antflix.net#760.136_(F))", + "displayTitle": "(F) In Hoistways", + "children": [], + "url": "https://2023.antflix.net#760.136_(F)" + }, + { + "body": "PLFA circuits shall be permitted to be installed together with the conductors of electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are installed using NPFLA wiring methods and materials in accordance with Part II of Article 760 and are protected by an approved method. [760.136_(G)](https://2023.antflix.net#760.136_(G))", + "displayTitle": "(G) Where Protected", + "children": [], + "url": "https://2023.antflix.net#760.136_(G)" + }, + { + "body": "For other applications, power-limited fire alarm circuit conductors shall be separated by at least 50 mm (2 in.) from conductors of any electric light, power, Class 1, non\u2014power-limited fire alarm, or medium-power network-powered broadband communications circuits unless one of the following conditions is met: Either (a) all of the electric light, power, Class 1. non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors or (b) all of the power-limited fire alarm circuit conductors are in a raceway or in metal-sheathed, metal-clad, nonmetallic-sheathed, or Type UF cables.All of the electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors are permanently separated from all of the power-limited fire alarm circuit conductors by a continuous and firmly fixed nonconductor, such as porcelain tubes or flexible tubing, in addition to the insulation on the conductors. [760.136_(H)](https://2023.antflix.net#760.136_(H))", + "displayTitle": "(H) Other Applications", + "children": [], + "url": "https://2023.antflix.net#760.136_(H)" + } + ], + "url": "https://2023.antflix.net#760.136" + }, + { + "displayTitle": "760.139 Installation of Conductors of Different PLFA Circuits, Class 2, Class 3, and Communications Circuits in the Same Cable, Enclosure, Cable Tray, Raceway, or Cable Routing Assembly", + "children": [ + { + "body": "(Cable and conductors of two or more power-limited fire alarm circuits shall be permitted within the same cable, enclosure, cable tray, raceway, or cable routing assembly. [760.139_(A)](https://2023.antflix.net#760.139_(A))", + "displayTitle": "(A) Two or More PLFA Circuits", + "children": [], + "url": "https://2023.antflix.net#760.139_(A)" + }, + { + "body": "Conductors of one or more Class 2 circuits shall be permitted within the same cable, enclosure, cable tray, raceway, or cable routing assembly with conductors of power-limited fire alarm circuits if the insulation of the Class 2 circuit conductors in the cable, enclosure, raceway, or cable routing assembly is at least that required by the power-limited fire alarm circuits. [760.139_(B)](https://2023.antflix.net#760.139_(B))", + "displayTitle": "(B) Class 2 Circuits With PLFA Circuits", + "children": [], + "url": "https://2023.antflix.net#760.139_(B)" + }, + { + "body": "Cable and conductors of Class 3 and communications circuits shall be permitted within the same cable, enclosure, cable tray, raceway, or cable routing assembly with cables and conductors of power-limited fire alarm circuits. [760.139_(C)](https://2023.antflix.net#760.139_(C))", + "displayTitle": "(C) Class 3 and Communications Circuits With PLFA Circuits", + "children": [], + "url": "https://2023.antflix.net#760.139_(C)" + }, + { + "body": "Low-power network-powered broadband communications circuits shall be permitted in the same enclosure, cable tray, raceway, or cable routing assembly with PLFA cables. [760.139_(D)](https://2023.antflix.net#760.139_(D))", + "displayTitle": "(D) Low-Power Network-Powered Broadband Communications Cables and PLFA Cables", + "children": [], + "url": "https://2023.antflix.net#760.139_(D)" + }, + { + "body": "Audio system circuits described in 640.9(C) and installed using Class 2 or Class 3 wiring methods in compliance with 722.135 shall not be installed in the same cable, cable tray, raceway, or cable routing assembly with power-limited conductors or cables. [760.139_(E)](https://2023.antflix.net#760.139_(E))", + "displayTitle": "(E) Audio System Circuits and PLFA Circuits", + "children": [], + "url": "https://2023.antflix.net#760.139_(E)" + } + ], + "url": "https://2023.antflix.net#760.139" + }, + { + "body": "Conductors of 26 AWG shall be permitted only where spliced with a connector listed as suitable for 26 AWG to 24 AWG or larger conductors that are terminated on equipment or where the 26 AWG conductors are terminated on equipment listed as suitable for 26 AWG conductors. Single conductors shall not be smaller than 18 AWG. [760.142](https://2023.antflix.net#760.142)", + "displayTitle": "760.142 Conductor Size", + "children": [], + "url": "https://2023.antflix.net#760.142" + }, + { + "body": "Power-limited fire alarm circuit conductors shall not be strapped, taped, or attached by any means to the exterior of any conduit or other raceway as a means of support. [760.143](https://2023.antflix.net#760.143)", + "displayTitle": "760.143 Support of Conductors", + "children": [], + "url": "https://2023.antflix.net#760.143" + }, + { + "displayTitle": "760.145 Current-Carrying Continuous Line-Type Fire Detectors", + "children": [ + { + "body": "Listed continuous line-type fire detectors, including insulated copper tubing of pneumatically operated detectors, employed for both detection and carrying signaling currents shall be permitted to be used in power-limited circuits. [760.145_(A)](https://2023.antflix.net#760.145_(A))", + "displayTitle": "(A) Application", + "children": [], + "url": "https://2023.antflix.net#760.145_(A)" + }, + { + "body": "Continuous line-type fire detectors shall be installed in accordance with 760.124 through 760.130 and 760.133. [760.145_(B)](https://2023.antflix.net#760.145_(B))", + "displayTitle": "(B) Installation", + "children": [], + "url": "https://2023.antflix.net#760.145_(B)" + } + ], + "url": "https://2023.antflix.net#760.145" + }, + { + "body": "PLFA cables shall comply with the requirements described in Table 760.154 or where cable substitutions are made as shown in 760.154(A). Where substitute cables are installed, the wiring requirements of Article 760, Parts 1 and III, shall apply. Types FPLP-CI, FPLR-CI, and FPL-CI cables shall be permitted to be installed to provide 2-hour circuit integrity rated cables. [760.154](https://2023.antflix.net#760.154)", + "displayTitle": "760.154 Applications of Listed PLFA Cables", + "children": [ + { + "body": "The substitutions for fire alarm cables listed in Table 760.154(A) and illustrated in Figure 760.154(A) shall be permitted. Where substitute cables are installed, the wiring requirements of Article 760, Parts I and III, shall apply. Informational Note: See 800.179 for information on communications cables (CMP, CMR, CMG, CM). FIGURE 760.154(A) Cable Substitution Hierarchy. Table 760.154 Applications of Listed PLFA Cables in Buildings Applications Cable Type FPLP & FPLP-CI FPLR & FPLR-CI FPL & FPL-CI In fabricated ducts as described in 300.22(B) In fabricated ducts Y* N N In metal raceway that complies with 300.22(B) Y* Y* Y* In other spaces used for environmental air as described in 300.22(C) In other spaces used for environmental air Y* N N In metal raceway that complies with 300.22(C) Y* Y* Y* In plenum communications raceways Y* N N In plenum cable routing assemblies Y* N N Supported by open metal cable trays Y* N N Supported by solid bottom metal cable trays with solid metal covers Y* Y* Y* In risers In vertical runs Y* Y* N In metal raceways Y* Y* Y* In fireproof shafts Y* Y* Y* In plenum communications raceways Y* Y* N In plenum cable routing assemblies Y* Y* N In riser communications raceways Y* Y* N In riser cable routing assemblies Y* Y* N In one- and two-family dwellings Y* Y* Y* Within buildings in other than air-handling spaces and risers General Y* Y* Y* Supported by cable trays Y* Y* Y* In any raceway recognized in Chapter 3 Y* Y* Y* In plenum communications raceway Y* Y* Y* In plenum cable routing assemblies Y* Y* Y* In riser communications raceways Y* Y* Y* In riser cable routing assemblies Y* Y* Y* In general-purpose communications raceways Y* Y* Y* In general-purpose cable routing assemblies Y* Y* Y* Note: \"N\" indicates that the cable type shall not be permitted to be installed in the application. \"Y*\" indicates that the cable type shall be permitted to be installed in the application subject to the limitations described in 760.130 through 760.145. Table 760.154(A) Cable Substitutions Cable Type Permitted Substitutions FPLP CMP FPLR CMP, FPLP, CMR FPL CMP, FPLP, CMR, FPLR, CMG, CM [760.154_(A)](https://2023.antflix.net#760.154_(A))", + "displayTitle": "(A) Fire Alarm Cable Substitutions", + "children": [], + "url": "https://2023.antflix.net#760.154_(A)" + } + ], + "url": "https://2023.antflix.net#760.154" + }, + { + "displayTitle": "Part IV Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_42_IV" + }, + { + "body": "Non-power-limited fire alarm cables installed as wiring within buildings shall be listed in accordance with 760.176(A) and (B), be listed as resistant to the spread of fire in accordance with 760.176(C) through (F), and be marked in accordance with 760.176(G). Cable used in a wet location shall be listed for use in wet locations or have a moisture-impervious metal sheath. Non\u2014power-limited fire alarm cables shall have a temperature rating of not less than 60\u00b0C (140\u00b0F). Non-power-limited fire alarm cables shall be permitted to contain optical fibers. Informational Note: See UL 1425, Standard for Cables for Non\u2014Power-Limited Fire-Alarm Circuits, for information on non\u2014power-limited fire alarm cables. [760.176](https://2023.antflix.net#760.176)", + "displayTitle": "760.176 Listing and Marking of NPLFA Cables", + "children": [ + { + "body": "Conductors shall be 18 AWG or larger solid or stranded copper. [760.176_(A)](https://2023.antflix.net#760.176_(A))", + "displayTitle": "(A) NPLFA Conductor Materials", + "children": [], + "url": "https://2023.antflix.net#760.176_(A)" + }, + { + "body": "Insulation on conductors shall be rated for the system voltage and not less than 600 V. Insulated conductors 14 AWG and larger shall be one of the types listed in Table 310.4(1) or one that is identified for such use. Insulated conductors 18 AWG and 16 AWG shall be in accordance with 760.49. [760.176_(B)](https://2023.antflix.net#760.176_(B))", + "displayTitle": "(B) Insulated Conductors", + "children": [], + "url": "https://2023.antflix.net#760.176_(B)" + }, + { + "body": "Type NPLFP non\u2014power-limited fire alarm cable for use in other space used for environmental air shall be listed as being suitable for use in other space used for environmental air as described in 300.22(C) and shall also be listed as having adequate fire-resistant and low smoke-producing characteristics. Informational Note: See NFPA 262, Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air-Handling Spaces, for one method of defining a cable that is low-smoke producing and fire-resistant if the cable exhibits a maximum peak optical density of 0.50 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.52 m (5 ft) or less when tested. [760.176_(C)](https://2023.antflix.net#760.176_(C))", + "displayTitle": "(C) Type NPLFP", + "children": [], + "url": "https://2023.antflix.net#760.176_(C)" + }, + { + "body": "Type NPLFR non\u2014power-limited fire alarm riser cable shall be listed as being suitable for use in a vertical run in a shaft or from floor to floor and shall also be listed as having fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. Informational Note: See UL 1666, Test for Flame Propagation Height of Electrical and Optical-Fiber Cables Installed Vertically in Shafts, for one method of defining fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. [760.176_(D)](https://2023.antflix.net#760.176_(D))", + "displayTitle": "(D) Type NPLFR", + "children": [], + "url": "https://2023.antflix.net#760.176_(D)" + }, + { + "body": "Type NPLF non\u2014power-limited fire alarm cable shall be listed as being suitable for general-purpose fire alarm use, with the exception of use in risers, ducts, plenums, and other space used for environmental air, and shall also be listed as being resistant to the spread of fire. Informational Note: See UL 2556, Wire and Cable Test Methods, for one method of defining resistant to the spread of fire. One method is to demonstrate that the cables do not spread fire to the top of the tray in the \"UL Flame Exposure, Vertical Tray Flame Test.\" The smoke measurements in the test method are not applicable. Another method of defining resistant to the spread of fire is for the damage (char length) not to exceed 1.5 m (4 ft 11 in.) when performing the FT4 \"Vertical Flame Test.\" [760.176_(E)](https://2023.antflix.net#760.176_(E))", + "displayTitle": "(E) Type NPLF", + "children": [], + "url": "https://2023.antflix.net#760.176_(E)" + }, + { + "body": "Cables that are used for survivability of critical circuits under fire conditions shall be listed and meet the requirements of 760.176(F)(1), (F)(2), or (F)(3). Informational Note: See NFPA 72, National Fire Alarm and Signaling Code, 12.4.3 and 12.4.4, for additional information on circuit integrity (CI) cable, fire-resistive cable systems, or electrical circuit protective systems used for fire alarm circuits to comply with the survivability requirements to maintain the circuit's electrical function during fire conditions for a defined period of time. [760.176_(F)](https://2023.antflix.net#760.176_(F))", + "displayTitle": "(F) Circuit Integrity (CI) Cable, Fire-Resistive Cable System, or Electrical Circuit Protective System", + "children": [ + { + "body": "Circuit integrity (CI) cables specified in 760.176(C), (D), and (E) and used for survivability of critical circuits shall be marked for an additional classification using the suffix \"-CI.\" In order to maintain its listed fire-resistive rating, CI cables shall only be installed in free air in accordance with 760.24(B). CI cables shall only be permitted to be installed in a raceway where specifically listed and marked as part of an electrical circuit protective fire-resistive cable system as covered in 760.176(F)(2). CI cables shall only be permitted to be installed in a raceway where specifically listed and marked as part of an electrical circuit protective system as covered in 760.176(F)(2). Informational Note: See UL 2196, Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, and UL 1425, Cables for Non-Power-Limited Fire-Alarm Circuits, for information on establishing a rating for CI cable. The UL Guide Information for Nonpower-limited Fire Alarm Circuits (HNHT) contains information for identifying the cable and its installation limitations to maintain the fire-resistive rating. [760.176_(F)_(1)](https://2023.antflix.net#760.176_(F)_(1))", + "displayTitle": "(1) Circuit Integrity (CI) Cables", + "children": [], + "url": "https://2023.antflix.net#760.176_(F)_(1)" + }, + { + "body": "Cables specified in 760.176(C), (D), (E), and (F)(1) that are part of a fire-resistive cable system shall be identified with the system identifier and hourly rating marked on the protectant or the smallest unit container and installed in accordance with the listing of the system. Informational Note: See UL 2196, Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for information on establishing a rating for a fire-resistive cable system. The UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information for identifying the system and its installation limitations to maintain a minimum fire-resistive rating. [760.176_(F)_(2)](https://2023.antflix.net#760.176_(F)_(2))", + "displayTitle": "(2) Fire-Resistive Cable Systems", + "children": [], + "url": "https://2023.antflix.net#760.176_(F)_(2)" + }, + { + "body": "Protectants for cables specified in 760.176(C), (D), and (E) that are part of an electrical circuit protective system shall be identified with the protective system identifier and hourly rating marked on the protectant or the smallest unit container and installed in accordance with the listing of the protective system. Informational Note: See UL 1724, Fire Tests for Electrical Circuit Protective Systems, for information on establishing a rating for an electrical circuit protective system. The UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information for identifying the system and its installation limitations to maintain the fire-resistive rating. [760.176_(F)_(3)](https://2023.antflix.net#760.176_(F)_(3))", + "displayTitle": "(3) Electrical Circuit Protective System", + "children": [], + "url": "https://2023.antflix.net#760.176_(F)_(3)" + } + ], + "url": "https://2023.antflix.net#760.176_(F)" + }, + { + "body": "Multiconductor non\u2014power-limited fire alarm cables shall be marked in accordance with Table 760.176(G). Non\u2014power-limited fire alarm circuit cables shall be permitted to be marked with a maximum usage voltage rating of 150 volts. Cables that are listed for circuit integrity shall be identified with the suffix \"-CI\" as defined in 760.176(F). The temperature rating shall be marked on the jacket of NPLFA cables that have a temperature rating exceeding 60\u00b0C (140\u00b0F). The jacket of NPLFA cables shall be marked with the conductor size. Informational Note: Cable types are listed in descending order of fire performance. Table 760.176(G) NPLFA Cable Markings Cable Marking Type Reference NPLFP Non-power-limited fire alarm circuit cable for use in other space used for environmental air 760.176(C) and (G) NPLFR Non-power-limited fire alarm circuit riser cable 760.176(D) and (G) NPLF Non-power-limited fire alarm circuit cable 760.176(E) and (G) Notes:Cables identified in 760.176(C), (D), and (E) and meeting the requirements for circuit integrity shall have the additional classification using the suffix \"-CI\" (for example, NPLFP-CI, NPLFR-CI, and NPLF-CI).Cables containing optical fibers shall be provided with the suffix \"-OF\". [760.176_(G)](https://2023.antflix.net#760.176_(G))", + "displayTitle": "(G) NPLFA Cable Markings", + "children": [], + "url": "https://2023.antflix.net#760.176_(G)" + } + ], + "url": "https://2023.antflix.net#760.176" + }, + { + "body": "Insulated continuous line-type fire detectors shall be listed in accordance with 760.179(A) through (D). Cable used in a wet location shall be listed for use in wet locations or have a moisture-impervious metal sheath. [760.179](https://2023.antflix.net#760.179)", + "displayTitle": "760.179 Listing and Marking of Insulated Continuous Line-Type Fire Detectors", + "children": [ + { + "body": "The cable shall be listed as being resistant to the spread of fire in accordance with 722.179(A)(1), (A)(2), and (A)(3). [760.179_(A)](https://2023.antflix.net#760.179_(A))", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#760.179_(A)" + }, + { + "body": "The cable shall have a voltage rating of not less than 300 volts. The cable shall have a temperature rating of not less than 60\u00b0C (140\u00b0F). [760.179_(B)](https://2023.antflix.net#760.179_(B))", + "displayTitle": "(B) Voltage and Temperature Rating", + "children": [], + "url": "https://2023.antflix.net#760.179_(B)" + }, + { + "body": "The cable shall be marked as fire resistance Type FPLP, Type FPLR, or Type FPL in accordance with 722.179(B). The voltage rating shall not be marked on the cable. The temperature rating shall be marked on the jacket of cables that have a temperature rating exceeding 60\u00b0C (140\u00b0F). The jacket of PLFA cables shall be marked with the conductor size. Informational Note: Voltage ratings on cables might be misinterpreted to suggest that the cables could be suitable for Class 1, electric light, and power applications. Exception: Voltage markings shall be permitted where the cable has multiple listings and voltage marking is required for one or more of the listings. [760.179_(C)](https://2023.antflix.net#760.179_(C))", + "displayTitle": "(C) Markings", + "children": [], + "url": "https://2023.antflix.net#760.179_(C)" + }, + { + "body": "The cable jacket compound shall have a high degree of abrasion resistance. [760.179_(D)](https://2023.antflix.net#760.179_(D))", + "displayTitle": "(D) Cable Jacket Compound", + "children": [], + "url": "https://2023.antflix.net#760.179_(D)" + } + ], + "url": "https://2023.antflix.net#760.179" + } + ], + "url": "https://2023.antflix.net#760" + }, + { + "displayTitle": "Article 770 Optical Fiber Cables", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_117_I" + }, + { + "body": "This article covers the installation of optical fiber cables. This article does not cover the construction of optical fiber cables. [770.1](https://2023.antflix.net#770.1)", + "displayTitle": "770.1 Scope", + "children": [], + "url": "https://2023.antflix.net#770.1" + }, + { + "body": "Installations of optical fiber cables shall comply with 770.3(A) through (D). Only those sections of Chapter 2 and Article 300 referenced in this article shall apply to optical fiber cables. [770.3](https://2023.antflix.net#770.3)", + "displayTitle": "770.3 Other Articles", + "children": [ + { + "body": "Listed optical fiber cables shall be permitted to be installed in hazardous (classified) locations. The cables shall be sealed in accordance with 501.15, 502.15, 505.16, or 506.16, as applicable. [770.3_(A)](https://2023.antflix.net#770.3_(A))", + "displayTitle": "(A) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#770.3_(A)" + }, + { + "body": "The requirements of 300.22(A) for wiring systems shall apply to conductive optical fiber cables. [770.3_(B)](https://2023.antflix.net#770.3_(B))", + "displayTitle": "(B) Cables in Ducts for Dust, Loose Stock, or Vapor Removal", + "children": [], + "url": "https://2023.antflix.net#770.3_(B)" + }, + { + "body": "Hybrid optical fiber cables shall be classified as electrical cables in accordance with the type of electrical conductors. They shall be constructed, listed, and marked in accordance with the appropriate article for each type of electrical cable. [770.3_(C)](https://2023.antflix.net#770.3_(C))", + "displayTitle": "(C) Hybrid Cables", + "children": [], + "url": "https://2023.antflix.net#770.3_(C)" + }, + { + "body": "Vertical installations of circuit integrity (CI) cables installed in a raceway or cables of fire-resistive cable systems shall be installed in accordance with their listing. [770.3_(D)](https://2023.antflix.net#770.3_(D))", + "displayTitle": "(D) Vertical Support for Fire-Resistive Cables", + "children": [], + "url": "https://2023.antflix.net#770.3_(D)" + } + ], + "url": "https://2023.antflix.net#770.3" + }, + { + "body": "Access to electrical equipment shall not be denied by an accumulation of optical fiber cables that prevents removal of panels, including suspended ceiling panels. [770.21](https://2023.antflix.net#770.21)", + "displayTitle": "770.21 Access to Electrical Equipment Behind Panels Designed to Allow Access", + "children": [], + "url": "https://2023.antflix.net#770.21" + }, + { + "displayTitle": "770.24 Mechanical Execution of Work", + "children": [ + { + "body": "Optical fiber cables shall be installed in a neat and workmanlike manner. Cables installed exposed on the surface of ceilings and sidewalls shall be supported by the building structure in such a manner that the cable will not be damaged by normal building use. Such cables shall be secured by hardware, including straps; staples; cable ties listed and identified for securement and support; and hangers, or similar fittings, designed and installed so as not to damage the cable. The installation shall also conform to 300.4 and 300.11. Plenum cable ties and other nonmetallic cable accessories used to secure and support cables in other spaces used for environmental air (plenums) shall be listed as having low smoke and heat release properties in accordance with 800.170. Informational Note No. 1: See ANSI/NECA/FOA 301-2016, Standard for Installing and Testing Fiber Optic Cables, ANSI/ TIA-568.0-D-2015, Generic Telecommunications Cabling for Customer Premises, and ANSI/TIA 568.3-D-2016, Optical Fiber Cabling and Components Standard, for accepted industry practices. Informational Note No. 2: See NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, for discrete combustible components installed in accordance with 300.22(C). Informational Note No. 3: Paint, plaster, cleaners, abrasives, corrosive residues, or other contaminants may result in an undetermined alteration of optical fiber cable properties. [770.24_(A)](https://2023.antflix.net#770.24_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#770.24_(A)" + }, + { + "body": "Circuit integrity (CI) cable shall be supported at a distance not exceeding 610 mm (24 in.). Cable shall be secured to the noncombustible surface of the building structure. Cable supports and fasteners shall be steel. [770.24_(B)](https://2023.antflix.net#770.24_(B))", + "displayTitle": "(B) Circuit Integrity (CI) Cable", + "children": [], + "url": "https://2023.antflix.net#770.24_(B)" + } + ], + "url": "https://2023.antflix.net#770.24" + }, + { + "body": "The accessible portion of abandoned optical fiber cables shall be removed. Where cables are identified for future use with a tag, the tag shall be of sufficient durability to withstand the environment involved. [770.25](https://2023.antflix.net#770.25)", + "displayTitle": "770.25 Abandoned Cables", + "children": [], + "url": "https://2023.antflix.net#770.25" + }, + { + "body": "Installations of optical fiber cables and communications raceways in hollow spaces, vertical shafts, and ventilation or air-handling ducts shall be made so that the possible spread of fire or products of combustion will not be substantially increased. Openings around penetrations of optical fiber cables and communications raceways through fire-resistant-rated walls, partitions, floors, or ceilings shall be fire-stopped using approved methods to maintain the fire resistance rating. Informational Note: Directories of electrical construction materials published by qualified testing laboratories contain many listing installation restrictions necessary to maintain the fire-resistive rating of assemblies where penetrations or openings are made. Building codes also contain restrictions on membrane penetrations on opposite sides of a fire resistance\u2014rated wall assembly. An example is the 600-mm (24-in.) minimum horizontal separation that usually applies between boxes installed on opposite sides of the wall. Assistance in complying with 770.26 can be found in building codes, fire resistance directories, and product listings. [770.26](https://2023.antflix.net#770.26)", + "displayTitle": "770.26 Spread of Fire or Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#770.26" + }, + { + "body": "Optical fiber cable shall not be used in such a manner that its operating temperature exceeds that of its rating. [770.27](https://2023.antflix.net#770.27)", + "displayTitle": "770.27 Temperature Limitation of Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#770.27" + }, + { + "displayTitle": "Part II Cables Outside and Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_117_II" + }, + { + "body": "Overhead optical fiber cables containing a non-current-carrying metallic member entering buildings shall comply with 800.44(A) and (B). [770.44](https://2023.antflix.net#770.44)", + "displayTitle": "770.44 Overhead (Aerial) Optical Fiber Cables", + "children": [ + { + "body": "Where outside plant optical fiber cables and electric light or power conductors are supported by the same pole or are run parallel to each other in-span, the conditions described in 770.44(A)(1) through (A)(4) shall be met. [770.44_(A)](https://2023.antflix.net#770.44_(A))", + "displayTitle": "(A) On Poles and In-Span", + "children": [ + { + "body": "Where practicable, the outside plant optical fiber cables shall be located below the electric light or power conductors. [770.44_(A)_(1)](https://2023.antflix.net#770.44_(A)_(1))", + "displayTitle": "(1) Relative Location", + "children": [], + "url": "https://2023.antflix.net#770.44_(A)_(1)" + }, + { + "body": "Attachment of outside plant optical fiber cables to a cross-arm that carries electric light or power conductors shall not be permitted. [770.44_(A)_(2)](https://2023.antflix.net#770.44_(A)_(2))", + "displayTitle": "(2) Attachment to Cross-Arms", + "children": [], + "url": "https://2023.antflix.net#770.44_(A)_(2)" + }, + { + "body": "The climbing space through outside plant optical fiber cables shall comply with the requirements of 225.14(B). [770.44_(A)_(3)](https://2023.antflix.net#770.44_(A)_(3))", + "displayTitle": "(3) Climbing Space", + "children": [], + "url": "https://2023.antflix.net#770.44_(A)_(3)" + }, + { + "body": "Supply service drops and sets of overhead service conductors of 0 to 750 volts running above and parallel to optical fiber cable service drops shall have a minimum separation of 300 mm (12 in.) at any point in the span, including the point of their attachment to the building. Clearance of not less than 1.0 m (40 in.) shall be maintained between the two services at the pole. [770.44_(A)_(4)](https://2023.antflix.net#770.44_(A)_(4))", + "displayTitle": "(4) Clearance", + "children": [], + "url": "https://2023.antflix.net#770.44_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#770.44_(A)" + }, + { + "body": "Outside plant optical fiber cables shall have a vertical clearance of not less than 2.5 m (8 ft) from all points of roofs above which they pass. Exception No. 1: The requirement of 770.44(B) shall not apply to auxiliary buildings such as garages and the like. Exception No. 2: A reduction in clearance above only the overhanging portion of the roof to not less than 450 mm (18 in.) shall be permitted if (1) not more than 1.2 m (4 ft) of optical fiber cable service drop cable passes above the roof overhang, and (2) the cable is terminated at a through- or above-the-roof raceway or approved support. Exception No. 3: Where the roof has a slope of not less than 100 mm in 300 mm (4 in. in 12 in.), a reduction in clearance to not less than 900 mm (3 ft) shall be permitted. Informational Note: See ANSI/IEEE C2-2017, National Electric Safety Code, Part 2, Safety Rules for Overhead Lines, for additional information regarding overhead wires and cables. [770.44_(B)](https://2023.antflix.net#770.44_(B))", + "displayTitle": "(B) Above Roofs", + "children": [], + "url": "https://2023.antflix.net#770.44_(B)" + } + ], + "url": "https://2023.antflix.net#770.44" + }, + { + "body": "Underground optical fiber cables entering buildings shall comply with 770.47(A) and (B). [770.47](https://2023.antflix.net#770.47)", + "displayTitle": "770.47 Underground Optical Fiber Cables Entering Buildings", + "children": [ + { + "body": "Underground conductive optical fiber cables entering buildings with electric light, power, Class 1, or non\u2014power-limited fire alarm circuit conductors in a raceway, handhole enclosure, or manhole shall be located in a section separated from such conductors by means of brick, concrete, or tile partitions or by means of a suitable barrier. [770.47_(A)](https://2023.antflix.net#770.47_(A))", + "displayTitle": "(A) Underground Systems With Electric Light, Power, Class 1, or Non\u2014Power-Limited Fire Alarm Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#770.47_(A)" + }, + { + "body": "Direct-buried conductive optical fiber cables shall be separated by at least 300 mm (12 in.) from conductors of any electric light, power, non-power-limited fire alarm circuit conductors, or Class 1 circuit. Exception No. 1: Separation shall not be required where the electric service conductors are installed in raceways or have metal cable armor. Exception No. 2: Separation shall not be required where electric light or power branch-circuit or feeder conductors, non\u2014power-limited fire alarm circuit conductors, or Class 1 circuit conductors are installed in a raceway or in metal-sheathed, metal-clad, or Type UF or Type USE cables. [770.47_(B)](https://2023.antflix.net#770.47_(B))", + "displayTitle": "(B) Direct-Buried Cables and Raceways", + "children": [], + "url": "https://2023.antflix.net#770.47_(B)" + } + ], + "url": "https://2023.antflix.net#770.47" + }, + { + "displayTitle": "770.48 Unlisted Cables Entering Buildings", + "children": [ + { + "body": "Unlisted conductive and nonconductive outside plant optical fiber cables shall be permitted to be installed in building spaces, other than risers, ducts used for environmental air, plenums used for environmental air, and other spaces used for environmental air, where the length of the cable within the building, measured from its point of entrance, does not exceed 15 m (50 ft) and the cable enters the building from the outside and is terminated in an enclosure. The point of entrance shall be permitted to be extended from the penetration of the external wall, roof, or floor slab by continuously enclosing the entrance optical fiber cables in rigid metal conduit (RMC) or intermediate metal conduit (IMC) to the point of emergence. Informational Note: Splice cases or terminal boxes, both metallic and plastic types, typically are used as enclosures for splicing or terminating optical fiber cables. [770.48_(A)](https://2023.antflix.net#770.48_(A))", + "displayTitle": "(A) Conductive and Nonconductive Cables", + "children": [], + "url": "https://2023.antflix.net#770.48_(A)" + }, + { + "body": "Unlisted nonconductive outside plant optical fiber cables shall be permitted to enter the building from the outside and shall be permitted to be installed in any of the following raceways: Intermediate metal conduit (IMC)Rigid metal conduit (RMC)Rigid polyvinyl chloride conduit (PVC)Electrical metallic tubing (EMT)Unlisted nonconductive outside plant cables installed in rigid polyvinyl chloride conduit (PVC) or electrical metallic tubing (EMT) shall not be installed in risers, ducts used for environmental air, plenums used for environmental air, and other spaces used for environmental air. [770.48_(B)](https://2023.antflix.net#770.48_(B))", + "displayTitle": "(B) Nonconductive Cables in Raceway", + "children": [], + "url": "https://2023.antflix.net#770.48_(B)" + } + ], + "url": "https://2023.antflix.net#770.48" + }, + { + "body": "Metal conduit containing optical fiber entrance cable shall be connected by a bonding conductor or grounding electrode conductor to a grounding electrode or, where present, the building grounding electrode system in accordance with 770.100(B). [770.49](https://2023.antflix.net#770.49)", + "displayTitle": "770.49 Metal Entrance Conduit Grounding", + "children": [], + "url": "https://2023.antflix.net#770.49" + }, + { + "displayTitle": "Part III Protection", + "children": [], + "url": "https://2023.antflix.net#divider_101_III" + }, + { + "body": "Optical fiber cables entering the building or terminating on the outside of the building shall comply with 770.93(A) or (B). [770.93](https://2023.antflix.net#770.93)", + "displayTitle": "770.93 Grounding, Bonding, or Interruption of Non-Current-Carrying Metallic Members of Optical Fiber Cables", + "children": [ + { + "body": "In installations where an optical fiber cable is exposed to contact with electric light or power conductors and the cable enters the building, the non-current-carrying metallic members shall be either grounded or bonded as specified in 770.100 or interrupted by an insulating joint or equivalent device. The grounding or interruption shall be as close as practicable to the point of entrance. [770.93_(A)](https://2023.antflix.net#770.93_(A))", + "displayTitle": "(A) Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#770.93_(A)" + }, + { + "body": "In installations where an optical fiber cable is exposed to contact with electric light or power conductors and the cable is terminated on the outside of the building, the non-current-carrying metallic members shall be either grounded or bonded as specified in 770.100 or interrupted by an insulating joint or equivalent device. The grounding, bonding, or interruption shall be as close as practicable to the point of termination of the cable. [770.93_(B)](https://2023.antflix.net#770.93_(B))", + "displayTitle": "(B) Terminating on the Outside of Buildings", + "children": [], + "url": "https://2023.antflix.net#770.93_(B)" + } + ], + "url": "https://2023.antflix.net#770.93" + }, + { + "displayTitle": "Part IV Grounding Methods", + "children": [], + "url": "https://2023.antflix.net#divider_43_IV" + }, + { + "body": "If required, the non-current-carrying metallic members of optical fiber cables entering buildings shall be bonded or grounded as specified in 770.100(A) through (D). [770.100](https://2023.antflix.net#770.100)", + "displayTitle": "770.100 Entrance Cable Bonding and Grounding", + "children": [ + { + "displayTitle": "(A) Bonding Conductor or Grounding Electrode Conductor", + "children": [ + { + "body": "The bonding conductor or grounding electrode conductor shall be listed and shall be permitted to be insulated, covered, or bare. [770.100_(A)_(1)](https://2023.antflix.net#770.100_(A)_(1))", + "displayTitle": "(1) Insulation", + "children": [], + "url": "https://2023.antflix.net#770.100_(A)_(1)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall be copper or other corrosion-resistant conductive material, stranded or solid. [770.100_(A)_(2)](https://2023.antflix.net#770.100_(A)_(2))", + "displayTitle": "(2) Material", + "children": [], + "url": "https://2023.antflix.net#770.100_(A)_(2)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall not be smaller than 14 AWG. It shall have a current-carrying capacity not less than that of the grounded metallic member(s). The bonding conductor or grounding electrode conductor shall not be required to exceed 6 AWG. [770.100_(A)_(3)](https://2023.antflix.net#770.100_(A)_(3))", + "displayTitle": "(3) Size", + "children": [], + "url": "https://2023.antflix.net#770.100_(A)_(3)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall be as short as practicable. In one- and two- family dwellings, the bonding conductor or grounding electrode conductor shall be as short as practicable not to exceed 6.0 m (20 ft) in length. Informational Note: Similar bonding conductor or grounding electrode conductor length limitations applied at apartment buildings and commercial buildings help to reduce voltages that may develop between the building's power and communications systems during lightning events. Exception: In one- and two-family dwellings if it is not practicable to achieve an overall maximum bonding conductor or grounding electrode conductor length of 6.0 m (20 ft), a separate ground rod meeting the minimum dimensional criteria of 770.100(B)(3)(2) shall be driven, the grounding electrode conductor shall be connected to the separate ground rod in accordance with 770.100(C), and the separate ground rod shall be bonded to the power grounding electrode system in accordance with 770.100(D). [770.100_(A)_(4)](https://2023.antflix.net#770.100_(A)_(4))", + "displayTitle": "(4) Length", + "children": [], + "url": "https://2023.antflix.net#770.100_(A)_(4)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall be run in as straight a line as practicable. [770.100_(A)_(5)](https://2023.antflix.net#770.100_(A)_(5))", + "displayTitle": "(5) Run in Straight Line", + "children": [], + "url": "https://2023.antflix.net#770.100_(A)_(5)" + }, + { + "body": "Bonding conductors and grounding electrode conductors shall be protected where exposed to physical damage. Where the bonding conductor or grounding electrode conductor is installed in a metal raceway, both ends of the raceway shall be bonded to the contained conductor or to the same terminal or electrode to which the bonding conductor or grounding electrode conductor is connected. [770.100_(A)_(6)](https://2023.antflix.net#770.100_(A)_(6))", + "displayTitle": "(6) Physical Protection", + "children": [], + "url": "https://2023.antflix.net#770.100_(A)_(6)" + } + ], + "url": "https://2023.antflix.net#770.100_(A)" + }, + { + "body": "The bonding conductor and grounding electrode conductor shall be connected in accordance with 770.100(B)(1), (B)(2), or (B)(3). [770.100_(B)](https://2023.antflix.net#770.100_(B))", + "displayTitle": "(B) Electrode", + "children": [ + { + "body": "If the building or structure served has an intersystem bonding termination as required by 250.94, the bonding conductor shall be connected to the intersystem bonding termination. Informational Note: See Informational Note Figure 800.100(B)(1) for an illustration of the application of the bonding conductor in buildings or structures equipped with an intersystem bonding termination. [770.100_(B)_(1)](https://2023.antflix.net#770.100_(B)_(1))", + "displayTitle": "(1) In Buildings or Structures With an Intersystem Bonding Termination", + "children": [], + "url": "https://2023.antflix.net#770.100_(B)_(1)" + }, + { + "body": "If an intersystem bonding termination is established, 250.94(A) shall apply. If the building or structure served has no intersystem bonding termination, the bonding conductor or grounding electrode conductor shall be connected to the nearest accessible location on one of the following:The building or structure grounding electrode system as covered in 250.50The power service accessible means external to enclosures using the options identified in 250.94(A), ExceptionThe nonflexible metal power service racewayThe service equipment enclosureThe grounding electrode conductor or the grounding electrode conductor metal enclosure of the power serviceThe grounding electrode conductor or the grounding electrode of a building or structure disconnecting means that is connected to a grounding electrode as covered in 250.32The grounded interior metal water piping system, within 1.5 m (5 ft) from its point of entrance to the building, as covered in 250.52Informational Note: See Informational Note Figure 800.100(B)(2) for an illustration of the application of the bonding conductor in buildings or structures not equipped with an intersystem bonding termination or terminal block providing access to the building grounding electrode system. [770.100_(B)_(2)](https://2023.antflix.net#770.100_(B)_(2))", + "displayTitle": "(2) In Buildings or Structures With Grounding Means", + "children": [], + "url": "https://2023.antflix.net#770.100_(B)_(2)" + }, + { + "body": "If the building or structure served has no intersystem bonding termination or grounding means, as described in 770.100(B)(2), the grounding electrode conductor shall be connected to either of the following: To any one of the individual grounding electrodes described in 250.52(A)(1), (A)(2), (A)(3), or (A)(4).If the building or structure served has no grounding means, as described in 770.100(B)(2) or (B)(3)(l), to any one of the individual grounding electrodes described in 250.52(A)(7) and (A)(8) or to a ground rod or pipe not less than 1.5 m (5 ft) in length and 12.7 mm (1/2 in.) in diameter, driven, where practicable, into permanently damp earth and separated from lightning protection system conductors as covered in 800.53 and at least 1.8 m (6 ft) from electrodes of other systems. Steam, hot water pipes, or lightning protection system conductors shall not be employed as electrodes for non-current-carrying metallic members. [770.100_(B)_(3)](https://2023.antflix.net#770.100_(B)_(3))", + "displayTitle": "(3) In Buildings or Structures Without Intersystem Bonding Termination or Grounding Means", + "children": [], + "url": "https://2023.antflix.net#770.100_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#770.100_(B)" + }, + { + "body": "Connections to grounding electrodes shall comply with 250.70. [770.100_(C)](https://2023.antflix.net#770.100_(C))", + "displayTitle": "(C) Electrode Connection", + "children": [], + "url": "https://2023.antflix.net#770.100_(C)" + }, + { + "body": "A bonding jumper not smaller than 6 AWG copper or equivalent shall be connected between the grounding electrode and power grounding electrode system at the building or structure served where separate electrodes are used. Exception: At mobile homes as covered in 770.106. Informational Note No. 1: See 250.60 for connection to a lightning protection system. Informational Note No. 2: Bonding together of all separate electrodes limits potential differences between them and between their associated wiring systems. [770.100_(D)](https://2023.antflix.net#770.100_(D))", + "displayTitle": "(D) Bonding of Electrodes", + "children": [], + "url": "https://2023.antflix.net#770.100_(D)" + } + ], + "url": "https://2023.antflix.net#770.100" + }, + { + "displayTitle": "770.106 Grounding and Bonding of Entrance Cables at Mobile Homes", + "children": [ + { + "body": "Grounding shall comply with 770.106(A)(1) and (A)(2). Installations Without Mobile Home Service Equipment. If there is no mobile home service equipment located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, the non-current-carrying metallic members of optical fiber cables entering the mobile home shall be grounded in accordance with 770.100(B)(3).Installations Without Mobile Home Disconnecting Means. If there is no mobile home disconnecting means grounded in accordance with 250.32 and located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, the non-current-carrying metallic members of optical fiber cables entering the mobile home shall be grounded in accordance with 770.100(B)(3). [770.106_(A)](https://2023.antflix.net#770.106_(A))", + "displayTitle": "(A) Grounding", + "children": [], + "url": "https://2023.antflix.net#770.106_(A)" + }, + { + "body": "The grounding electrode shall be bonded to the metal frame or available grounding terminal of the mobile home with a copper conductor or other equivalent corrosion-resistant material not smaller than 12 AWG under either of the following conditions: If there is no mobile home service equipment or disconnecting means as in 770.106(A)If the mobile home is supplied by cord and plug [770.106_(B)](https://2023.antflix.net#770.106_(B))", + "displayTitle": "(B) Bonding", + "children": [], + "url": "https://2023.antflix.net#770.106_(B)" + } + ], + "url": "https://2023.antflix.net#770.106" + }, + { + "displayTitle": "Part V Installation Methods Within Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_30_V" + }, + { + "displayTitle": "770.110 Raceways, Cable Routing Assemblies, and Cable Trays for Optical Fiber Cables", + "children": [ + { + "body": "Optical fiber cables shall be permitted to be installed in any raceway that complies with either 770.110(A)(1) or (A)(2). [770.110_(A)](https://2023.antflix.net#770.110_(A))", + "displayTitle": "(A) Types of Raceways", + "children": [ + { + "body": "Optical fiber cables shall be permitted to be installed in any raceway included in Chapter 3. The raceways shall be installed in accordance with Chapter 3. [770.110_(A)_(1)](https://2023.antflix.net#770.110_(A)_(1))", + "displayTitle": "(1) Raceways Recognized in Chapter 3", + "children": [], + "url": "https://2023.antflix.net#770.110_(A)_(1)" + }, + { + "body": "Optical fiber cables shall be permitted to be installed in listed communications raceways selected in accordance with Table 800.154(b). [770.110_(A)_(2)](https://2023.antflix.net#770.110_(A)_(2))", + "displayTitle": "(2) Communications Raceways", + "children": [], + "url": "https://2023.antflix.net#770.110_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#770.110_(A)" + }, + { + "body": "Raceway fill for optical fiber cables shall comply with either 770.110(B)(1) or (B)(2). [770.110_(B)](https://2023.antflix.net#770.110_(B))", + "displayTitle": "(B) Raceway Fill for Optical Fiber Cables", + "children": [ + { + "body": "Where optical fiber cables are installed in raceway without electric light or power conductors, the raceway fill requirements of Chapters 3 and 9 shall not apply. [770.110_(B)_(1)](https://2023.antflix.net#770.110_(B)_(1))", + "displayTitle": "(1) Without Electric Light or Power Conductors", + "children": [], + "url": "https://2023.antflix.net#770.110_(B)_(1)" + }, + { + "body": "Where nonconductive optical fiber cables are installed with electric light or power conductors in a raceway, the raceway fill requirements of Chapters 3 and 9 shall apply. [770.110_(B)_(2)](https://2023.antflix.net#770.110_(B)_(2))", + "displayTitle": "(2) Nonconductive Optical Fiber Cables With Electric Light or Power Conductors", + "children": [], + "url": "https://2023.antflix.net#770.110_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#770.110_(B)" + }, + { + "body": "Optical fiber cables shall be permitted to be installed in listed cable routing assemblies selected in accordance with Table 800.154(c). [770.110_(C)](https://2023.antflix.net#770.110_(C))", + "displayTitle": "(C) Cable Routing Assemblies", + "children": [], + "url": "https://2023.antflix.net#770.110_(C)" + }, + { + "body": "Optical fiber cables shall be permitted to be installed in metal or listed nonmetallic cable tray systems. [770.110_(D)](https://2023.antflix.net#770.110_(D))", + "displayTitle": "(D) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#770.110_(D)" + } + ], + "url": "https://2023.antflix.net#770.110" + }, + { + "body": "Listed plenum communications raceways, listed riser communications raceways, and listed general-purpose communications raceways selected in accordance with Table 800.154(b) shall be permitted to be installed as innerduct in any type of listed raceway permitted in Chapter 3. [770.111](https://2023.antflix.net#770.111)", + "displayTitle": "770.111 Innerduct for Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#770.111" + }, + { + "body": "Installation of optical fiber cables shall comply with 770.113(A) through (J). Installation of raceways and cable routing assemblies shall comply with 770.110. [770.113](https://2023.antflix.net#770.113)", + "displayTitle": "770.113 Installation of Optical Fiber Cables", + "children": [ + { + "body": "Optical fiber cables installed in buildings shall be listed in accordance with 770.179 and installed in accordance with the limitations of the listing. Exception: Optical fiber cables that are installed in compliance with 770.48 shall not be required to be listed. [770.113_(A)](https://2023.antflix.net#770.113_(A))", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#770.113_(A)" + }, + { + "body": "Installations of optical fiber cables in ducts specifically fabricated for environmental air shall be in accordance with 770.113(B)(1) and (B)(2). [770.113_(B)](https://2023.antflix.net#770.113_(B))", + "displayTitle": "(B) Ducts Specifically Fabricated for Environmental Air", + "children": [ + { + "body": "The following cables shall be permitted in ducts specifically fabricated for environmental air as described in 300.22(B) if they are directly associated with the air distribution system: Up to 1.22 m (4 ft) of Types OFNP and OFGPTypes OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC installed in raceways that are installed in compliance with 300.22(B)Informational Note: For information on fire protection of wiring installed in fabricated ducts, see NFPA 90A-2018, Standard for the Installation of Air-Conditioning and Ventilating Systems. [770.113_(B)_(1)](https://2023.antflix.net#770.113_(B)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#770.113_(B)_(1)" + }, + { + "body": "Types OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall not be permitted to be installed in ducts specifically fabricated for environmental air as described in 300.22(B). Informational Note: See NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, for information on fire protection of wiring installed in fabricated ducts. [770.113_(B)_(2)](https://2023.antflix.net#770.113_(B)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#770.113_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#770.113_(B)" + }, + { + "body": "Installations of optical fiber cables in other spaces used for environmental air shall be in accordance with 770.113(C)(1) and (C)(2). [770.113_(C)](https://2023.antflix.net#770.113_(C))", + "displayTitle": "(C) Other Spaces Used for Environmental Air (Plenums)", + "children": [ + { + "body": "The following cables shall be permitted in other spaces used for environmental air as described in 300.22(C): Types OFNP and OFCPTypes OFNP and OFCP installed in plenum communications racewaysTypes OFNP and OFCP installed in plenum cable routing assembliesTypes OFNP and OFCP supported by open metal cable tray systemsTypes OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC installed in raceways that are installed in compliance with 300.22(C)Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC supported by solid bottom metal cable trays with solid metal covers in other spaces used for environmental air (plenums), as described in 300.22(C)Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC installed in plenum riser and general-purpose communications raceways supported by solid bottom metal cable trays with solid metal covers in other spaces used for environmental air (plenums), as described in 300.22(C) [770.113_(C)_(1)](https://2023.antflix.net#770.113_(C)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#770.113_(C)_(1)" + }, + { + "body": "Types OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall not be permitted to be installed in other spaces used for environmental air (plenums). Informational Note: See NFPA 90A-2018, Standard for the Installation of Air-Conditioning and Ventilating Systems, for information on fire protection of wiring installed in other spaces used for environmental air. [770.113_(C)_(2)](https://2023.antflix.net#770.113_(C)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#770.113_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#770.113_(C)" + }, + { + "body": "Installations of optical fiber cables in vertical runs shall be in accordance with 770.113(D)(1) and (D)(2). (l) Uses Permitted. The following cables shall be permitted in vertical runs penetrating one or more floors and in vertical runs in a shaft:Types OFNP, OFCP, OFNR, and OFCRTypes OFNP, OFCP, OFNR, and OFCR installed in the following:Plenum communications racewaysPlenum cable routing assembliesRiser communications racewaysRiser cable routing assemblies [770.113_(D)](https://2023.antflix.net#770.113_(D))", + "displayTitle": "(D) Risers - Cables in Vertical Runs", + "children": [], + "url": "https://2023.antflix.net#770.113_(D)" + }, + { + "body": "Types OFNG, OFCG, OFN, and OFC shall not be permitted to be installed in vertical runs. Informational Note: See 770.26 for firestop requirements for floor penetrations. [770.113_(2)](https://2023.antflix.net#770.113_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#770.113_(2)" + }, + { + "body": "The following cables and innerducts shall be permitted in metal raceways in a riser having firestops at each floor: Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFCTypes OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC installed in the following:Plenum communications raceways (innerduct)Riser communications raceways (innerduct)General-purpose communications raceways (innerduct)Informational Note: See 770.26 for firestop requirements for floor penetrations. [770.113_(E)](https://2023.antflix.net#770.113_(E))", + "displayTitle": "(E) Risers - Cables Permitted in Metal Raceways", + "children": [], + "url": "https://2023.antflix.net#770.113_(E)" + }, + { + "body": "The following cables shall be permitted to be installed in fireproof riser shafts having firestops at each floor: Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFCTypes OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC installed in the following:Plenum communications racewaysPlenum cable routing assembliesRiser communications racewaysRiser cable routing assembliesGeneral-purpose communications racewaysGeneral-purpose cable routing assembliesInformational Note: See 770.26 for firestop requirements for floor penetrations. [770.113_(F)](https://2023.antflix.net#770.113_(F))", + "displayTitle": "(F) Risers - Cables Permitted in Fireproof Shafts", + "children": [], + "url": "https://2023.antflix.net#770.113_(F)" + }, + { + "body": "The following cables shall be permitted in one- and two- family dwellings: Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFCTypes OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC installed in the following:Plenum communications racewaysPlenum cable routing assembliesRiser communications racewaysRiser cable routing assembliesGeneral-purpose communications racewaysGeneral-purpose cable routing assemblies [770.113_(G)](https://2023.antflix.net#770.113_(G))", + "displayTitle": "(G) Risers - Cables Permitted in One- And Two-Family Dwellings", + "children": [], + "url": "https://2023.antflix.net#770.113_(G)" + }, + { + "body": "The following cables shall be permitted to be supported by cable trays: Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFCTypes OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC installed in the following:Plenum communications racewaysRiser communications racewaysGeneral-purpose communications raceways [770.113_(H)](https://2023.antflix.net#770.113_(H))", + "displayTitle": "(H) Cable Trays - Cables Permitted", + "children": [], + "url": "https://2023.antflix.net#770.113_(H)" + }, + { + "body": "The following cables shall be permitted to be installed in distributing frames and cross-connect arrays: (2) Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC (3) Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC installed in the following:Plenum communications racewaysPlenum cable routing assembliesRiser communications racewaysRiser cable routing assembliesGeneral-purpose communications racewaysGeneral-purpose cable routing assemblies [770.113_(I)](https://2023.antflix.net#770.113_(I))", + "displayTitle": "(I) Distributing Frames and Cross-Connect Arrays - Cables Permitted", + "children": [], + "url": "https://2023.antflix.net#770.113_(I)" + }, + { + "body": "The following cables shall be permitted to be installed in building locations other than the locations covered in 770.113(B) through (I): Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFCTypes OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC installed in:Plenum communications racewaysPlenum cable routing assembliesRiser communications racewaysRiser cable routing assembliesGeneral-purpose communications racewaysGeneral-purpose cable routing assembliesTypes OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC installed in a raceway of a type recognized in Chapter 3 [770.113_(J)](https://2023.antflix.net#770.113_(J))", + "displayTitle": "(J) Other Building Locations - Cables Permitted", + "children": [], + "url": "https://2023.antflix.net#770.113_(J)" + } + ], + "url": "https://2023.antflix.net#770.113" + }, + { + "body": "Non-current-carrying conductive members of optical fiber cables shall be bonded to a grounded equipment rack or enclosure, or grounded in accordance with the grounding methods specified by 770.100(B) using a conductor specified in 770.100(A). [770.114](https://2023.antflix.net#770.114)", + "displayTitle": "770.114 Grounding", + "children": [], + "url": "https://2023.antflix.net#770.114" + }, + { + "displayTitle": "770.133 Installation of Optical Fibers and Electrical Conductors", + "children": [ + { + "body": "Conductive optical fiber cables contained in an armored or metal-clad-type sheath and nonconductive optical fiber cables shall be permitted to occupy the same cable tray or raceway with conductors for electric light, power, Class 1, non-power-limited fire alarm, Type ITC, or medium-power network-powered broadband communications circuits operating at 1000 volts or less. Conductive optical fiber cables without an armored or metal-clad-type sheath shall not be permitted to occupy the same cable tray or raceway with conductors for electric light, power, Class 1, non-power-limited fire alarm, Type ITC, or medium-power network-powered broadband communications circuits, unless all of the conductors of electric light, power, Class 1, non\u2014power-limited fire alarm, and medium-power network-powered broadband communications circuits are separated from all of the optical fiber cables by a permanent barrier or listed divider. [770.133_(A)](https://2023.antflix.net#770.133_(A))", + "displayTitle": "(A) In Cable Trays and Raceways", + "children": [], + "url": "https://2023.antflix.net#770.133_(A)" + }, + { + "body": "Nonconductive optical fiber cables shall not be permitted to occupy the same cabinet, outlet box, panel, or similar enclosure housing the electrical terminations of an electric light, power, Class 1, non\u2014power-limited fire alarm, or medium-power network-powered broadband communications circuit unless one or more of the following conditions exist: The nonconductive optical fiber cables are functionally associated with the electric light, power, Class 1, non-power-limited fire alarm, or medium-power network-powered broadband communications circuit.The conductors for electric light, power, Class 1, non-power-limited fire alarm, Type ITC, or medium-power network-powered broadband communications circuits operate at 1000 volts or less.The nonconductive optical fiber cables and the electrical terminations of electric light, power, Class 1, non\u2014power-limited fire alarm, or medium-power network-powered broadband communications circuit are installed in factory- or field-assembled control centers.The nonconductive optical fiber cables are installed in an industrial establishment where conditions of maintenance and supervision ensure that only qualified persons service the installation. (C) With Other Circuits. Conductive and nonconductive optical fiber cables shall be permitted in the same raceway, cable tray, box, enclosure, or cable routing assembly, with conductors of any of the following: When optical fibers are within the same hybrid cable for electric light, power, Class 1, non\u2014power-limited fire alarm, or medium-power network-powered broadband communications circuits operating at 1000 volts or less, they shall be permitted to be installed only where the functions of the optical fibers and the electrical conductors are associated.Optical fibers in hybrid optical fiber cables containing only current-carrying conductors for electric light, power, or Class 1 circuits rated 1000 volts or less shall be permitted to occupy the same cabinet, cable tray, outlet box, panel, raceway, or other termination enclosure with conductors for electric light, power, or Class 1 circuits operating at 1000 volts or less.Optical fibers in hybrid optical fiber cables containing current-carrying conductors for electric light, power, or Class 1 circuits rated over 1000 volts shall be permitted to occupy the same cabinet, cable tray, outlet box, panel, raceway, or other termination enclosure with conductors for electric light, power, or Class 1 circuits in industrial establishments, where conditions of maintenance and supervision ensure that only qualified persons service the installation.Class 2 and Class 3 remote-control, signaling, and power-limited circuits in compliance with 645.5(E)(2) or Parts I and II of Article 725Power-limited fire alarm systems in compliance with Parts I and III of Article 760Communications circuits in compliance with Parts I and V of Article 805Community antenna television and radio distribution systems in compliance with Parts I and V of Article 820Low-power network-powered broadband communications circuits in compliance with Parts I and V of Article 830 [770.133_(B)](https://2023.antflix.net#770.133_(B))", + "displayTitle": "(B) In Cabinets, Outlet Boxes, and Similar Enclosures", + "children": [], + "url": "https://2023.antflix.net#770.133_(B)" + }, + { + "body": "Raceways shall be used for their intended purpose. Optical fiber cables shall not be strapped, taped, or attached by any means to the exterior of any conduit or raceway as a means of support. Exception: Overhead (aerial) spans of optical fiber cables shall be permitted to be attached to the exterior of a raceway-type mast intended for the attachment and support of such cables. [770.133_(D)](https://2023.antflix.net#770.133_(D))", + "displayTitle": "(D) Support of Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#770.133_(D)" + } + ], + "url": "https://2023.antflix.net#770.133" + }, + { + "body": "Permitted and nonpermitted applications of listed optical fiber cables shall be as indicated in Table 770.154(a). The permitted applications shall be subject to the installation requirements of 770.110 and 770.113. The substitutions for optical fiber cables in Table 770.154(b) and illustrated in Figure 770.154 shall be permitted. Table 770.154(a) Applications of Listed Optical Fiber Cables in Buildings Applications Listed Optical Fiber Cable Type OFNP, OFCP OFNR, OFCR OFNG, OFCG, OFN, OFC In ducts specifically fabricated for environmental air as described in 300.22(B) In fabricated ducts Y* N N In metal raceway that complies with 300.22(B) Y* Y* Y* In other spaces used for environmental air (plenums) as described in 300.22(C) In other spaces used for environmental air Y* N N In metal raceway that complies with 300.22(C) Y* Y* Y* In plenum communications raceways Y* N N In plenum cable routing assemblies Y* N N Supported by open metal cable trays Y* N N Supported by solid bottom metal cable trays with solid metal covers Y* Y* Y* In risers In vertical runs Y* Y* N In metal raceways Y* Y* Y* In fireproof shafts Y* Y* Y* In plenum communications raceways Y* Y* N In plenum cable routing assemblies Y* Y* N In riser communications raceways Y* Y* N In riser cable routing assemblies Y* Y* N In one- and two-family dwellings Y* Y* Y* Within buildings in other than air-handling spaces and risers General Y* Y* Y* Supported by cable trays Y* Y* Y* In distributing frames and cross-connect arrays Y* Y* Y* In any raceway recognized in Chapter 3 Y* Y* Y* In plenum communications raceway Y* Y* Y* In plenum cable routing assemblies Y* Y* Y* In riser communications raceways Y* Y* Y* In riser cable routing assemblies Y* Y* Y* In general-purpose communications raceways Y* Y* Y* In general-purpose cable routing assemblies Y* Y* Y* Note: \"N\" indicates that the cable type shall not be permitted to be installed in the application. \"Y*\" indicates that the cable type shall be permitted to be installed in the application subject to the limitations described in 770.110 and 770.113. Informational Note No. 1: Part V of Article 770 covers installation methods within buildings. This table covers the applications of listed optical fiber cables in buildings. The definition of Point of Entrance is in 770.2. Informational Note No. 2: For information on the restrictions to the installation of optical fiber cables in ducts specifically fabricated for environmental air, see 770.113(B). Table 770.154(b) Cable Substitutions Cable Type Permitted Substitutions OFNP None OFCP OFNP OFNR OFNP OFCR OFNP, OFCP, OFNR OFNG, OFN OFNP, OFNR OFCG, OFC OFNP, OFCP, OFNR, OFCR, OFNG, OFN FIGURE 770.154 Cable Substitution Hierarchy. [770.154](https://2023.antflix.net#770.154)", + "displayTitle": "770.154 Applications of Listed Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#770.154" + }, + { + "displayTitle": "Part VI Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_22_VI" + }, + { + "body": "Optical fiber cables shall be listed and identified in accordance with 770.179(A) through (G) and shall be marked in accordance with Table 770.179. Optical fiber cables shall have a temperature rating of not less than 60\u00b0C (140\u00b0F). The temperature rating shall be marked on the jacket of optical fiber cables that have a temperature rating exceeding 60\u00b0C (140\u00b0F). Informational Note: See UL 1651-2015, Standard for Optical Fiber Cable, for information on optical fiber cables. [770.179](https://2023.antflix.net#770.179)", + "displayTitle": "770.179 Optical Fiber Cables", + "children": [ + { + "body": "Types OFNP and OFCP nonconductive and conductive optical fiber plenum cables shall be suitable for use in ducts, plenums, and other space used for environmental air and shall also have adequate fire-resistant and low-smoke-producing characteristics. Informational Note: See NFPA 262-2019, Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air-Handling Spaces, for one method of defining that a cable has adequate fire-resistant and low-smoke-producing characteristics where the cable exhibits a maximum peak optical density of 0.50 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.52 m (5 ft) or less. [770.179_(A)](https://2023.antflix.net#770.179_(A))", + "displayTitle": "(A) Types OFNP and OFCP", + "children": [], + "url": "https://2023.antflix.net#770.179_(A)" + }, + { + "body": "Types OFNR and OFCR nonconductive and conductive optical fiber riser cables shall be suitable for use in a vertical run in a shaft or from floor to floor and shall also have the fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. Informational Note: See ANSI/UL 1666-2017, Standard Test for Flame Propagation Height of Electrical and Optical-Fiber Cable Installed Vertically in Shafts, for one method of defining fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. [770.179_(B)](https://2023.antflix.net#770.179_(B))", + "displayTitle": "(B) Types OFNR and OFCR", + "children": [], + "url": "https://2023.antflix.net#770.179_(B)" + }, + { + "body": "Types OFNG and OFCG nonconductive and conductive general-purpose optical fiber cables shall be suitable for general-purpose use, with the exception of risers and plenums, and shall also be resistant to the spread of fire Informational Note No. 1: See CSA Vertical Flame Test - Cables in Cable Trays, as described in CSA C22.2 No. 0.3-2009 (R2019), Test Methods for Electrical Wires and Cables, for one method of defining resistant to the spread of fire for the damage (char length) not to exceed 1.5 m (4 ft 11 in.) when performing the test. Informational Note No. 2: See ANSI/UL 1685-2015, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables, for another method of defining resistant to the spread of fire where the cables do not spread fire to the top of the tray in the UL flame exposure, vertical tray flame test. The smoke measurements in the test method are not applicable. [770.179_(C)](https://2023.antflix.net#770.179_(C))", + "displayTitle": "(C) Types OFNG and OFCG", + "children": [], + "url": "https://2023.antflix.net#770.179_(C)" + }, + { + "body": "Types OFN and OFC nonconductive and conductive optical fiber cables shall be suitable for general-purpose use, with the exception of risers, plenums, and other spaces used for environmental air, and shall also be resistant to the spread of fire. Informational Note No. 1: See ANSI/UL 1685-2015, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables, for one method of defining resistant to the spread of fire where the cables do not spread fire to the top of the tray in the UL flame exposure, vertical tray flame test. The smoke measurements in the test method are not applicable. Informational Note No. 2: See CSA Vertical Flame Test - Cables in Cables Trays, as described in CSA C22.2 No. 0.3-2009 (R2019), Test Methods for Electrical Wires and Cables, for another method of defining resistant to the spread of fire where the damage (char length) does not exceed 1.5 m (4 ft 11 in.). Informational Note No. 3: Cable types are listed in descending order of fire resistance rating. Within each fire resistance rating, nonconductive cable is listed first because it is often substituted for conductive cable. [770.179_(D)](https://2023.antflix.net#770.179_(D))", + "displayTitle": "(D) Types OFN and OFC", + "children": [], + "url": "https://2023.antflix.net#770.179_(D)" + }, + { + "body": "Cables that are used for survivability of critical circuits under fire conditions shall meet either 770.179(E)(1), (E)(2), or (E)(3). [770.179_(E)](https://2023.antflix.net#770.179_(E))", + "displayTitle": "(E) Circuit Integrity (CI), Fire-Resistive Cable System, or Electrical Circuit Protective System", + "children": [ + { + "body": "Cables specified in 770.179(A) through (D), and used for survivability of critical circuits, shall be marked with the additional classification using the suffix \"CI\" In order to maintain its listed fire rating, CI cable shall only be installed in free air in accordance with 770.24. CI cables shall only be permitted to be installed in a raceway where specifically listed and marked as part of a fire-resistive cable system as covered in 770.179(E)(2). Informational Note: See UL 2196, Standard for Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for one method of defining CI cable for establishing a minimum 2-hour fire resistance rating for the cable as specified in UL 1651, Optical Fiber Cable. UL Guide Information for Optical Cable Fiber (QAYK) contains information to identify the cable and its installation limitations to maintain the fire-resistive rating. [770.179_(E)_(1)](https://2023.antflix.net#770.179_(E)_(1))", + "displayTitle": "(1) Circuit Integrity (CI) Cables", + "children": [], + "url": "https://2023.antflix.net#770.179_(E)_(1)" + }, + { + "body": "Cables specified in 770.179(A) through (D) and 770.179(E)(1) that are part of an electrical circuit protective system shall be fire-resistive cable and identified with the protective system number on the product or on the smallest unit container in which the product is packaged and installed in accordance with the listing of the protective system. Informational Note: See UL 2196, Standard for Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for one method of defining an electrical circuit protective system for establishing a rating for the system. UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information to identify the system and its installation limitations to maintain a minimum fire-resistive rating. [770.179_(E)_(2)](https://2023.antflix.net#770.179_(E)_(2))", + "displayTitle": "(2) Fire-Resistive Cables", + "children": [], + "url": "https://2023.antflix.net#770.179_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#770.179_(E)" + }, + { + "body": "Field-assembled optical fiber cable shall comply with the following: The specific combination of jacket and optical fibers intended to be installed as a field-assembled optical fiber cable shall be one of the types in 770.179(A), (B), or (D) and shall be marked in accordance with Table 770.179.The jacket of a field-assembled optical fiber cable shall have a surface marking indicating the specific optical fibers with which it is identified for use.The optical fibers shall have a permanent marking, such as a marker tape, indicating the jacket with which they are identified for use.The jacket without fibers shall meet the listing requirements for communications raceways in 800.182(A), (B), or (C) in accordance with the cable marking. [770.179_(F)](https://2023.antflix.net#770.179_(F))", + "displayTitle": "(F) Field-Assembled Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#770.179_(F)" + }, + { + "body": "Cables shall be permitted to be surface marked to indicate special characteristics of the cable materials. Informational Note: These markings can include, but are not limited to, markings for limited-smoke halogen-free, low-smoke halogen-free, and sunlight resistance. Table 770.179 Cable Markings Cable Marking Type OFNP Nonconductive optical fiber plenum cable OFCP Conductive optical fiber plenum cable OFNR Nonconductive optical fiber riser cable OFCR Conductive optical fiber riser cable OFNG Nonconductive optical fiber general-purpose cable OFCG Conductive optical fiber general-purpose cable OFN Nonconductive optical fiber general-purpose cable OFC Conductive optical fiber general-purpose cable [770.179_(G)](https://2023.antflix.net#770.179_(G))", + "displayTitle": "(G) Optional Markings", + "children": [], + "url": "https://2023.antflix.net#770.179_(G)" + } + ], + "url": "https://2023.antflix.net#770.179" + }, + { + "body": "Where bonding or grounding is required, devices used to connect a shield, a sheath, or noncurrent-carrying metallic members of a cable to a bonding conductor or grounding electrode conductor shall be listed or be part of listed equipment. [770.180](https://2023.antflix.net#770.180)", + "displayTitle": "770.180 Grounding Devices", + "children": [], + "url": "https://2023.antflix.net#770.180" + } + ], + "url": "https://2023.antflix.net#770" + } + ], + "url": "https://2023.antflix.net#7" + } + ], + "Chapter 8 Communications Systems": [ + { + "displayTitle": "Chapter 8 Communications Systems", + "children": [ + { + "displayTitle": "Article 800 General Requirements for Communications Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_118_I" + }, + { + "body": "This article covers general requirements for communications systems. These general requirements apply to communications circuits, community antenna television and radio distribution systems, network-powered broadband communications systems, and premises-powered broadband communications systems, unless modified by Articles 805, 820, 830, or 840. Informational Note No. 1: See 90.2(D)(4) for installations of circuits and equipment that are not covered. Informational Note No. 2: See Part II of Article 725 for information on the installation of Class 2 and Class 3 circuits and 722.135(E) for the substitution of communications cables for Class 2 and Class 3 cables. Informational Note No. 3: See Part II of Article 760 for information on the installation of power-limited fire alarm circuits, including the substitution of communications cables for power-limited fire alarm cables. [800.1](https://2023.antflix.net#800.1)", + "displayTitle": "800.1 Scope", + "children": [], + "url": "https://2023.antflix.net#800.1" + }, + { + "body": "The requirements of 110.21(A)(2) shall apply. [800.2](https://2023.antflix.net#800.2)", + "displayTitle": "800.2 Reconditioned Equipment", + "children": [], + "url": "https://2023.antflix.net#800.2" + }, + { + "body": "Only those sections of Chapters 1 through 7 referenced in Chapter 8 shall apply to Chapter 8. The definitions from Article 100 apply to Chapter 8. Installations of circuits and equipment shall comply with 800.3(A) through (H). [800.3](https://2023.antflix.net#800.3)", + "displayTitle": "800.3 Other Articles", + "children": [ + { + "body": "As appropriate for the services provided, the output circuits derived from a network-powered broadband communications system's network interface unit (NIU) or from a premises-powered broadband communications system's network terminal shall comply with the requirements of the following:\n\nInstallations of Class 2 and Class 3 circuits \u2014 Part II of Article 725 and Parts I and II of Article 722\nInstallations of power-limited fire alarm circuits \u2014 Part III of Article 760\nInstallations of optical fiber cables \u2014 Part V of Article 770\n\nInstallations of communications circuits \u2014 Part IV of Article 805\nInformational Note: The communications circuits covered by Article 805 are commonly referred to as POTS (plain old telephone service) circuits.\n\nInstallations of premises (within buildings) community antenna television and radio distribution circuits \u2014 Part V of Article 820\n [800.3_(A)](https://2023.antflix.net#800.3_(A))", + "displayTitle": "(A) Output Circuits", + "children": [], + "url": "https://2023.antflix.net#800.3_(A)" + }, + { + "body": "Circuits and equipment installed in a location that is classified in accordance with 500.5 and 505.5 shall comply with the applicable requirements of Chapter 5. [800.3_(B)](https://2023.antflix.net#800.3_(B))", + "displayTitle": "(B) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#800.3_(B)" + }, + { + "body": "The requirements of 300.22(A) shall apply. [800.3_(C)](https://2023.antflix.net#800.3_(C))", + "displayTitle": "(C) Wiring in Ducts for Dust, Loose Stock, or Vapor Removal", + "children": [], + "url": "https://2023.antflix.net#800.3_(C)" + }, + { + "body": "The requirements of 300.22(C)(3) shall apply. [800.3_(D)](https://2023.antflix.net#800.3_(D))", + "displayTitle": "(D) Equipment in Other Space Used for Environmental Air", + "children": [], + "url": "https://2023.antflix.net#800.3_(D)" + }, + { + "body": "The requirements of 110.3(B) shall apply. [800.3_(E)](https://2023.antflix.net#800.3_(E))", + "displayTitle": "(E) Installation and Use", + "children": [], + "url": "https://2023.antflix.net#800.3_(E)" + }, + { + "body": "Where optical fiber cable is used to provide a communications circuit within a building, Article 770 shall apply. [800.3_(F)](https://2023.antflix.net#800.3_(F))", + "displayTitle": "(F) Optical Fiber Cable", + "children": [], + "url": "https://2023.antflix.net#800.3_(F)" + }, + { + "body": "Vertical installations of circuit integrity (CI) cables and conductors installed in a raceway or conductors and cables of fire-resistive cable systems shall be installed in accordance with 300.19. [800.3_(G)](https://2023.antflix.net#800.3_(G))", + "displayTitle": "(G) Vertical Support for Fire-Resistive Cables and Conductors", + "children": [], + "url": "https://2023.antflix.net#800.3_(G)" + }, + { + "body": "The requirements of 250.4(A)(5) shall apply to the metal shields of cables used for communications. [800.3_(H)](https://2023.antflix.net#800.3_(H))", + "displayTitle": "(H) Bonding and Grounding of Cable Shields", + "children": [], + "url": "https://2023.antflix.net#800.3_(H)" + } + ], + "url": "https://2023.antflix.net#800.3" + }, + { + "body": "Access to electrical equipment shall not be denied by an accumulation of wires and cables that prevents removal of panels, including suspended ceiling panels. [800.21](https://2023.antflix.net#800.21)", + "displayTitle": "800.21 Access to Electrical Equipment Behind Panels Designed to Allow Access", + "children": [], + "url": "https://2023.antflix.net#800.21" + }, + { + "displayTitle": "800.24 Mechanical Execution of Work", + "children": [ + { + "body": "Circuits and equipment shall be installed in a neat and workmanlike manner. Cables installed exposed on the surface of ceilings and sidewalls shall be supported by the building structure in such a manner that the cable will not be damaged by normal building use. Such cables shall be secured by hardware, including straps; staples: cable ties listed and identified for securement and support; and hangers, or similar fittings, designed and installed so as not to damage the cable. The installation shall also conform to 300.4 and 300.11. Plenum cable ties and other nonmetallic cable accessories used to secure and support cables in other spaces used for environmental air (plenums) shall be listed as having low smoke and heat release properties in accordance with 800.170. Informational Note No. 1: See ANSI/BICSI Nl-2019, Installation Practices for Telecommunications and IC Cabling and Related Cabling Infrastructure, ANSI/TIA-568.1-E-2020, Commercial Building Telecommunications Infrastructure Standard; ANSI/TIA-569-E-2019, Telecommunications Pathways and Spaces; ANSI/TIA-570-C-2012, Residential Telecommunications Infrastructure Standard; ANSI/ TIA-1005-A-2012, Telecommunications Infrastructure Standard for Industrial Premises; ANSI/ TIA-1179-A-2017, Healthcare Facility Telecommunications Infrastructure Standard; ANSI/TIA-4966-2014, Telecommunications Infrastructure Standard for Educational Facilities; and other ANSI-approved installation standards for accepted industry practices. Informational Note No. 2: See NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, for discrete combustible components installed in accordance with 300.22(C). Informational Note No. 3: Paint, plaster, cleaners, abrasives, corrosive residues, or other contaminants may result in an undetermined alteration of wire and cable properties. [800.24_(A)](https://2023.antflix.net#800.24_(A))", + "displayTitle": "(A) General", + "children": [], + "url": "https://2023.antflix.net#800.24_(A)" + }, + { + "body": "CI cable shall be supported at a distance not exceeding 610 mm (24 in.). Cable shall be secured to the noncombustible surface of the building structure. Cable supports and fasteners shall be steel. [800.24_(B)](https://2023.antflix.net#800.24_(B))", + "displayTitle": "(B) Circuit Integrity (CI) Cable", + "children": [], + "url": "https://2023.antflix.net#800.24_(B)" + } + ], + "url": "https://2023.antflix.net#800.24" + }, + { + "body": "The accessible portion of abandoned cables shall be removed. Where cables are identified for future use with a tag, the tag shall be of sufficient durability to withstand the environment involved. [800.25](https://2023.antflix.net#800.25)", + "displayTitle": "800.25 Abandoned Cables", + "children": [], + "url": "https://2023.antflix.net#800.25" + }, + { + "body": "Installations of cables, communications raceways, cable routing assemblies in hollow spaces, vertical shafts, and ventilation or air-handling ducts shall be made so that the possible spread of fire or products of combustion will not be substantially increased. Openings around penetrations of cables, communications raceways, and cable routing assemblies through fire-resistant-rated walls, partitions, floors, or ceilings shall be firestopped using approved methods to maintain the fire resistance rating. Informational Note: Directories of electrical construction materials published by qualified testing laboratories contain many listing installation restrictions necessary to maintain the fire-resistive rating of assemblies where penetrations or openings are made. Building codes also contain restrictions on membrane penetrations on opposite sides of a fire resistance-rated wall assembly. An example is the 600 mm (24 in.) minimum horizontal separation that usually applies between boxes installed on opposite sides of the wall. Assistance in complying with 800.26 can be found in building codes, fire resistance directories, and product listings. [800.26](https://2023.antflix.net#800.26)", + "displayTitle": "800.26 Spread of Fire or Products of Combustion", + "children": [], + "url": "https://2023.antflix.net#800.26" + }, + { + "body": "No wire or cable shall be used in such a manner that its operating temperature exceeds that of its rating. [800.27](https://2023.antflix.net#800.27)", + "displayTitle": "800.27 Temperature Limitation of Wires and Cables", + "children": [], + "url": "https://2023.antflix.net#800.27" + }, + { + "displayTitle": "Part II Wires and Cables Outside and Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_118_II" + }, + { + "body": "Overhead (aerial) communications wires and cables and CATV-type coaxial cables entering buildings shall comply with 800.44(A) through (D). Informational Note: See ANSI C2-2017, National Electrical Safely Code, Part 2 Safety Rules for Overhead Lines, for additional information regarding overhead (aerial) wires and cables. [800.44](https://2023.antflix.net#800.44)", + "displayTitle": "800.44 Overhead (Aerial) Wires and Cables", + "children": [ + { + "body": "If communications wires and cables or CATV-type coaxial cables and electric light or power conductors are supported by the same pole or are run parallel to each other in-span, the conditions described in 800.44(A)(1) through (A)(4) shall be met. [800.44_(A)](https://2023.antflix.net#800.44_(A))", + "displayTitle": "(A) On Poles, In-Span, Above Roofs, on Masts, or Between Buildings", + "children": [ + { + "body": "If practicable, the communications wires and cables and CATV- type coaxial cables shall be located below the electric light or power conductors. [800.44_(A)_(1)](https://2023.antflix.net#800.44_(A)_(1))", + "displayTitle": "(1) Relative Location", + "children": [], + "url": "https://2023.antflix.net#800.44_(A)_(1)" + }, + { + "body": "Communications wires and cables and CATV-type coaxial cables shall not be attached to a cross-arm that carries electric light or power conductors. [800.44_(A)_(2)](https://2023.antflix.net#800.44_(A)_(2))", + "displayTitle": "(2) Attachment to Cross-Arms", + "children": [], + "url": "https://2023.antflix.net#800.44_(A)_(2)" + }, + { + "body": "The climbing space through wires and cables shall comply with the requirements of 225.14(B). [800.44_(A)_(3)](https://2023.antflix.net#800.44_(A)_(3))", + "displayTitle": "(3) Climbing Space", + "children": [], + "url": "https://2023.antflix.net#800.44_(A)_(3)" + }, + { + "body": "Supply service drops and sets of overhead service conductors of 0 volts to 750 volts running above and parallel to communications wires and cables and CATV-type coaxial service drops shall have a minimum separation of 300 mm (12 in.) at any point in the span, including the point of their attachment to the building, provided that the ungrounded conductors are insulated and that a clearance of not less than 1.0 m (40 in.) is maintained between the two services at the pole. [800.44_(A)_(4)](https://2023.antflix.net#800.44_(A)_(4))", + "displayTitle": "(4) Clearance", + "children": [], + "url": "https://2023.antflix.net#800.44_(A)_(4)" + } + ], + "url": "https://2023.antflix.net#800.44_(A)" + }, + { + "body": "Communications wires and cables and CATV-type coaxial cables shall have a vertical clearance of not less than 2.5 m (8 ft) from all points of roofs above which they pass. Exception No. 1: Communications wires and cables and CATV-type coaxial cables shall not be required to have a vertical clearance of not less than 2.5 m (8 ft) above auxiliary buildings, such as garages and the like. Exception No. 2: A reduction in clearance above only the overhanging portion of the roof to not less than 450 mm (18 in.) shall be permitted if (1) not more than 1.2 m (4 ft) of communications and CATV-type service-drop conductors pass above the roof overhang and (2) they are terminated at a through- or above-the-roof raceway or approved support. Exception No. 3: Where the roof has a slope of not less than 100 mm in 300 mm (4 in. in 12 in.), a reduction in clearance to not less than 900 mm (3 ft) shall be permitted. Informational Note: See ANSI/IEEE C2-2017, National Electrical Safety Code, Part 2, Safety Rules for Overhead Lines, for additional information regarding overhead (aerial) wire and cables. [800.44_(B)](https://2023.antflix.net#800.44_(B))", + "displayTitle": "(B) Above Roofs", + "children": [], + "url": "https://2023.antflix.net#800.44_(B)" + }, + { + "body": "Overhead (aerial) communications wires and cables and CATV-type coaxial cables shall be permitted to be attached to an above-the-roof raceway mast that does not enclose or support conductors of electric light or power circuits. [800.44_(C)](https://2023.antflix.net#800.44_(C))", + "displayTitle": "(C) On Masts", + "children": [], + "url": "https://2023.antflix.net#800.44_(C)" + }, + { + "body": "Communications and CATV-type coaxial cables extending between buildings or structures, and also the supports or attachment fixtures, shall be identified and shall have sufficient strength to withstand the loads to which they might be subjected. Exception: If a communications cable or a CATV-type coaxial cable does not have sufficient strength to be self-supporting, it shall be attached to a supporting messenger cable that, together with the. attachment fixtures or supports, shall be acceptable for the purpose and shall have sufficient strength to withstand the loads to which they may be subjected. [800.44_(D)](https://2023.antflix.net#800.44_(D))", + "displayTitle": "(D) Between Buildings", + "children": [], + "url": "https://2023.antflix.net#800.44_(D)" + }, + { + "body": "Where attached to buildings, communications wires and cables and CATV-type coaxial cables shall be securely fastened in such a manner that they will be separated from other conductors in accordance with 800.44(E)(1) and (E)(2). [800.44_(E)](https://2023.antflix.net#800.44_(E))", + "displayTitle": "(E) On Buildings", + "children": [ + { + "body": "The communications wires and cables and CATV-type coaxial cables shall have a separation of at least 100 mm (4 in.) from electric light, power, Class 1, or non-power-limited fire alarm circuit conductors not in raceway or cable, or shall be permanently separated from conductors of the other system by a continuous and firmly fixed nonconductive barrier in addition to the insulation on the wires. [800.44_(E)_(1)](https://2023.antflix.net#800.44_(E)_(1))", + "displayTitle": "(1) Electric Light or Power", + "children": [], + "url": "https://2023.antflix.net#800.44_(E)_(1)" + }, + { + "body": "Communications wires and cables and CATV-type coaxial cables shall be installed so that there will be no unnecessary interference in the maintenance of the separate systems. In no case shall the wires, cables, messenger strand, or equipment of one system cause abrasion to the wires, cables, messenger strand, or equipment of any other system. [800.44_(E)_(2)](https://2023.antflix.net#800.44_(E)_(2))", + "displayTitle": "(2) Other Communications Systems", + "children": [], + "url": "https://2023.antflix.net#800.44_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#800.44_(E)" + } + ], + "url": "https://2023.antflix.net#800.44" + }, + { + "body": "Underground communications wires and cables, CATV-type coaxial cables, and network-powered broadband communications cables entering buildings shall comply with 800.47(A) and (B). The requirements of 310.10(C) shall not apply to communications wires and cables and CATV-type coaxial cables. [800.47](https://2023.antflix.net#800.47)", + "displayTitle": "800.47 Underground Systems Entering Buildings", + "children": [ + { + "body": "Underground communications wires and cables, CATV-type coaxial cables, and network-powered broadband communications cables in a raceway, pedestal, handhole enclosure, or manhole containing electric light, power, Class 1, or non-power-limited fire alarm circuit conductors shall be in a section separated from such conductors by means of brick, concrete, or tile partitions or by means of a suitable barrier. [800.47_(A)](https://2023.antflix.net#800.47_(A))", + "displayTitle": "(A) Underground Systems With Electric Light, Power, Class 1, or Non-Power-Limited Fire Alarm Circuit Conductors", + "children": [], + "url": "https://2023.antflix.net#800.47_(A)" + }, + { + "body": "Direct-buried communications wires and cables, CATV-type coaxial cables, and network-powered broadband communications cables shall be separated at least 300 mm (12 in.) from conductors of any light or power, non-power-limited fire alarm circuit conductors, or Class 1 circuit. Exception No. 1: Separation shall not be required if electric service conductors or all the direct-buried communications wires and cables, CATV-type coaxial cables, and network-powered broadband communications cables are installed in raceways or have metal cable armor. Exception No. 2: Separation shall not be required under one of the following conditions: (1) If the. electric light or power branch-circuit or feeder conductors or Class 1 circuit conductors are installed in a raceway or in metal-sheathed, metal-clad, or Type UF or Type USE cables (2) If all the direct-buried communications wires cables, CATV-type coaxial cables, and network-powered broadband communications cables have metal cable armor or are installed in raceway [800.47_(B)](https://2023.antflix.net#800.47_(B))", + "displayTitle": "(B) Direct-Buried Cables and Raceways", + "children": [], + "url": "https://2023.antflix.net#800.47_(B)" + } + ], + "url": "https://2023.antflix.net#800.47" + }, + { + "body": "Unlisted outside plant communications cables and unlisted outside plant CATV-type coaxial cables shall be permitted to be installed in building spaces other than risers, ducts used for environmental air, plenums used for environmental air, and other spaces used for environmental air if all of the following applies: The length of the cable within the building, measured from its point of entrance, does not exceed 15 m (50 ft).The cable enters the building from the outside.The unlisted outside plant communications cable is terminated in an enclosure or on a listed primary protector, or the unlisted outside plant CATV type coaxial cable is terminated at a grounding block.The point of entrance shall be permitted to be extended from the penetration of the external wall, roof, or floor slab by continuously enclosing the entrance cables in rigid metal conduit (RMC) or intermediate metal conduit (IMC) to the point of emergence.Informational Note No. 1: Splice cases or terminal boxes, both metallic and plastic types, are typically used as enclosures for splicing or terminating communications cables.Informational Note No. 2: This section limits the length of unlisted outside plant cable to 15 m (50 ft) from the point of entrance, while 805.90(B) requires that the primary protector be located as close as practicable to the point of entrance of the cable. Therefore, in installations requiring a primary protector, the outside plant cable may not extend 15 m (50 ft) into the building if it is practicable to place the primary protector closer to the point of entrance. [800.48](https://2023.antflix.net#800.48)", + "displayTitle": "800.48 Unlisted Cables Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#800.48" + }, + { + "body": "Metal conduit containing entrance wire or cable shall be connected by a bonding conductor or grounding electrode conductor to a grounding electrode or, where present, the building grounding electrode system in accordance with 800.100(B). [800.49](https://2023.antflix.net#800.49)", + "displayTitle": "800.49 Metal Entrance Conduit Grounding", + "children": [], + "url": "https://2023.antflix.net#800.49" + }, + { + "body": "Where practicable on buildings, a separation of at least 1.8 m (6 ft) shall be maintained between lightning protection conductors and all communications wires and cables and CATV-type coaxial cables. Informational Note No. 1: See ANSI C2-2017 National Electrical Safety Code, Part 2, Safety Rules for Overhead Lines, for additional information regarding overhead (aerial) wires and cables. Informational Note No. 2: See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, for information on calculation of separation distances using the sideflash equation. [800.53](https://2023.antflix.net#800.53)", + "displayTitle": "800.53 Separation From Lightning Conductors", + "children": [], + "url": "https://2023.antflix.net#800.53" + }, + { + "displayTitle": "Part III Grounding Methods", + "children": [], + "url": "https://2023.antflix.net#divider_102_III" + }, + { + "displayTitle": "800.100 Cable and Primary Protector Bonding and Grounding", + "children": [ + { + "displayTitle": "(A) Bonding Conductor or Grounding Electrode Conductor", + "children": [ + { + "body": "The bonding conductor or grounding electrode conductor shall be listed and shall be permitted to be insulated, covered, or bare. [800.100_(A)_(1)](https://2023.antflix.net#800.100_(A)_(1))", + "displayTitle": "(1) Insulation", + "children": [], + "url": "https://2023.antflix.net#800.100_(A)_(1)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall be copper or other corrosion-resistant conductive material, stranded or solid. [800.100_(A)_(2)](https://2023.antflix.net#800.100_(A)_(2))", + "displayTitle": "(2) Material", + "children": [], + "url": "https://2023.antflix.net#800.100_(A)_(2)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall not be smaller than 14 AWG. The bonding conductor or grounding electrode conductor shall have a current-carrying capacity not less than the aggregate of the grounded metal cable sheath member, the metal strength member(s), and the protected conductor(s) of the communications cable, or the outer sheath of the coaxial cable, as applicable. The bonding conductor or grounding electrode conductor shall not be required to exceed 6 AWG. [800.100_(A)_(3)](https://2023.antflix.net#800.100_(A)_(3))", + "displayTitle": "(3) Size", + "children": [], + "url": "https://2023.antflix.net#800.100_(A)_(3)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall be as short as practicable. In one- and two- family dwellings, the bonding conductor or grounding electrode conductor shall be as short as practicable, not to exceed 6.0 m (20 ft) in length. Informational Note: Similar bonding conductor or grounding electrode conductor length limitations applied at apartment buildings and commercial buildings help to reduce voltages that may be developed between the building's power and communications systems during lightning events. See ANSI/TIA-607-D-2019, Generic Telecommunications Bonding and Grounding (Earthing) for Customer Premises, which includes useful information to reduce such voltages. Exception: In one- and two-family dwellings if it is not practicable to achieve an overall maximum bonding conductor or grounding electrode conductor length of 6.0 m (20 ft), a separate ground rod meeting the minimum dimensional criteria of 800.100(B)(3)(2) or (B)(3)(3) shall be driven, the bonding conductor or grounding electrode conductor shall be connected to the ground rod in accordance with 800.100(C), and the ground rod shall be connected to the power grounding electrode system in accordance with 800.100(D). [800.100_(A)_(4)](https://2023.antflix.net#800.100_(A)_(4))", + "displayTitle": "(4) Length", + "children": [], + "url": "https://2023.antflix.net#800.100_(A)_(4)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall be run in as straight a line as practicable. [800.100_(A)_(5)](https://2023.antflix.net#800.100_(A)_(5))", + "displayTitle": "(5) Run in Straight Line", + "children": [], + "url": "https://2023.antflix.net#800.100_(A)_(5)" + }, + { + "body": "Bonding conductors and grounding electrode conductors shall be protected where exposed to physical damage. If the bonding conductor or grounding electrode conductor is installed in a metal raceway, both ends of the raceway shall be bonded to the contained conductor or to the same terminal or electrode to which the bonding conductor or grounding electrode conductor is connected. [800.100_(A)_(6)](https://2023.antflix.net#800.100_(A)_(6))", + "displayTitle": "(6) Physical Protection", + "children": [], + "url": "https://2023.antflix.net#800.100_(A)_(6)" + } + ], + "url": "https://2023.antflix.net#800.100_(A)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall be connected in accordance with 800.100(B)(1), (B)(2), or (B)(3). [800.100_(B)](https://2023.antflix.net#800.100_(B))", + "displayTitle": "(B) Electrode", + "children": [ + { + "body": "If the building or structure served has an intersystem bonding termination as required by 250.94, the bonding conductor shall be connected to the intersystem bonding termination. Informational Note: Informational Note Figure 800.100(B)(1) illustrates the connection of the bonding conductor in buildings or structures equipped with an intersystem bonding termination or a terminal block providing access to the building grounding means. Informational Note Figure 800.100(B)(1) Illustration of a Bonding Conductor in a Communications Installation Equipped With an Intersystem Bonding Termination or Terminal Block Providing Access To the Building Grounding Means. [800.100_(B)_(1)](https://2023.antflix.net#800.100_(B)_(1))", + "displayTitle": "(1) In Buildings or Structures With an Intersystem Bonding Termination", + "children": [], + "url": "https://2023.antflix.net#800.100_(B)_(1)" + }, + { + "body": "If an intersystem bonding termination is established, 250.94(A) shall apply. If the building or structure served has no intersystem bonding termination, the bonding conductor or grounding electrode conductor shall be connected to the nearest accessible location on one of the following: The building or structure grounding electrode system as covered in 250.50The power service accessible means external to enclosures using the options identified in 250.94(A), ExceptionThe nonflexible metal power service racewayThe service equipment enclosureThe grounding electrode conductor or the grounding electrode conductor metal enclosure of the power serviceThe grounding electrode conductor or the grounding electrode of a building or structure disconnecting means that is connected to a grounding electrode as covered in 250.32The grounded interior metal water piping system, within 1.5 m (5 ft) from its point of entrance to the building, as covered in 250.52A bonding device intended to provide a termination point for the bonding conductor (intersystem bonding) shall not interfere with the opening of an equipment enclosure. A bonding device shall be mounted on nonremovable parts. A bonding device shall not be mounted on a door or cover even if the door or cover is nonremovable.For purposes of this section, the mobile home service equipment or the mobile home disconnecting means located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, or at a mobile home disconnecting means connected to an electrode by a grounding electrode conductor in accordance with 250.32 and located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, shall be considered to meet the requirements of this section.Informational Note: See Informational Note Figure 800.100(B)(2) for an illustration of a grounding electrode conductor and a bonding conductor in a communications installation not equipped with an intersystem bonding termination or terminal block. Informational Note Figure 800.100(B)(2) Illustration of a Grounding Electrode Conductor and a Bonding Conductor in a Communications Installation Not Equipped with an Intersystem Bonding Termination or Terminal Block Providing Access to the Building Grounding Means. [800.100_(B)_(2)](https://2023.antflix.net#800.100_(B)_(2))", + "displayTitle": "(2) In Buildings or Structures With Grounding Means", + "children": [], + "url": "https://2023.antflix.net#800.100_(B)_(2)" + }, + { + "body": "If the building or structure served has no intersystem bonding termination or grounding means, as described in 800.100(B)(2), the grounding electrode conductor shall be connected to one of the following: To any one of the individual grounding electrodes described in 250.52(A)(1), (A)(2), (A)(3), or (A)(4)If the building or structure served has no intersystem bonding termination or grounding means, as described in 800.100(B)(2) or (B)(3)(1), to any one of the individual grounding electrodes described in 250.52(A)(5), (A)(7), and (A)(8)For communications circuits covered in Article 805 or network-powered broadband communications systems covered in Article 830, to a ground rod or pipe not less than 1.5 m (5 ft) in length and 12.7 mm (0.5 in.) in diameter, driven, where practicable, into permanently damp earth and separated from lightning protection system conductors, as covered in 800.53, and at least 1.8 m (6 ft) from electrodes of other systemsSteam pipes, hot water pipes, or lightning protection system conductors shall not be employed as grounding electrodes or as a bonding or grounding electrode conductor for protectors and grounded metal members. [800.100_(B)_(3)](https://2023.antflix.net#800.100_(B)_(3))", + "displayTitle": "(3) In Buildings or Structures Without an Intersystem Bonding Termination or Grounding Means", + "children": [], + "url": "https://2023.antflix.net#800.100_(B)_(3)" + } + ], + "url": "https://2023.antflix.net#800.100_(B)" + }, + { + "body": "Connections to grounding electrodes shall comply with 250.70. [800.100_(C)](https://2023.antflix.net#800.100_(C))", + "displayTitle": "(C) Electrode Connection", + "children": [], + "url": "https://2023.antflix.net#800.100_(C)" + }, + { + "body": "A bonding jumper not smaller than 6 AWG copper or equivalent shall be connected between the grounding electrode and power grounding electrode system at the building or structure served if separate electrodes are used. Exception: Bonding of electrodes at mobile homes shall be in accordance with 800.106. Informational Note No. 1: See 250.60 for connection to a lightning protection system. Informational Note No. 2: Bonding together of all separate electrodes limits potential differences between them and between their associated wiring systems. [800.100_(D)](https://2023.antflix.net#800.100_(D))", + "displayTitle": "(D) Bonding of Electrodes", + "children": [], + "url": "https://2023.antflix.net#800.100_(D)" + } + ], + "url": "https://2023.antflix.net#800.100" + }, + { + "displayTitle": "800.106 Primary Protector Grounding and Bonding at Mobile Homes", + "children": [ + { + "body": "Grounding shall comply with 800.106(A)(1) and (A)(2). [800.106_(A)](https://2023.antflix.net#800.106_(A))", + "displayTitle": "(A) Grounding", + "children": [ + { + "body": "Where there is no mobile home service equipment located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, grounding shall comply with one of the following: The following components (if present) shall be connected to a grounding electrode in accordance with 800.100(B)(3):Primary protector grounding terminalNetwork interface unitCoaxial cable shield groundSurge arrester grounding terminalNetwork-powered broadband communications cable shieldNetwork-powered broadband communications cable metal members not used for communications or poweringThe non-current-carrying metal members of optical fiber cables shall be connected to a grounding electrode in accordance with 770.106(A)(1). The network terminal, if required to be grounded, shall be connected to a grounding electrode in accordance with 800.106(A)(1)(1). The grounding electrode shall be bonded in accordance with 770.106(B). [800.106_(A)_(1)](https://2023.antflix.net#800.106_(A)_(1))", + "displayTitle": "(1) Mobile Home Service Equipment", + "children": [], + "url": "https://2023.antflix.net#800.106_(A)_(1)" + }, + { + "body": "Where there is no mobile home disconnecting means grounded in accordance with 250.32 and located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, grounding shall comply with one of the following: The following components (if present) shall be connected to a grounding electrode in accordance with 800.100(B)(3):Primary protector grounding terminalNetwork interface unitNetwork-powered broadband communications shieldNetwork-powered broadband communications cable metal members not used for communications or poweringThe non-current-carrying metal members of optical fiber cables shall be connected to a grounding electrode in accordance with 770.106(A)(2). The network terminal, if required to be grounded, shall be connected to a grounding electrode in accordance with 800.106(A)(2). The grounding electrode shall be bonded in accordance with 770.106(B). [800.106_(A)_(2)](https://2023.antflix.net#800.106_(A)_(2))", + "displayTitle": "(2) Mobile Home Feeder Disconnecting Means", + "children": [], + "url": "https://2023.antflix.net#800.106_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#800.106_(A)" + }, + { + "body": "The primary protector grounding terminal or grounding electrode, network-powered broadband communications cable grounding terminal, or network interface unit grounding terminal shall be bonded together and connected to the metal frame or available grounding terminal of the mobile home with a copper conductor not smaller than 12 AWG under either of the following conditions: If there is no mobile home service equipment or disconnecting means as in 800.106(A)If the mobile home is supplied by cord and plug [800.106_(B)](https://2023.antflix.net#800.106_(B))", + "displayTitle": "(B) Bonding", + "children": [], + "url": "https://2023.antflix.net#800.106_(B)" + } + ], + "url": "https://2023.antflix.net#800.106" + }, + { + "displayTitle": "Part IV Installation Methods Within Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_44_IV" + }, + { + "displayTitle": "800.110 Raceways, Cable Routing Assemblies, and Cable Trays", + "children": [ + { + "body": "Wires and cables shall be permitted to be installed in raceways that comply with 800.110(A)(1), 800.110(A)(2), or 800.110(A)(3). Medium-power network-powered broadband communications cables shall not be installed in raceways that comply with 800.110(A)(2). [800.110_(A)](https://2023.antflix.net#800.110_(A))", + "displayTitle": "(A) Types of Raceways", + "children": [ + { + "body": "Wires and cables shall be permitted to be installed in any raceway included in Chapter 3. The raceways shall be installed in accordance with Chapter 3. [800.110_(A)_(1)](https://2023.antflix.net#800.110_(A)_(1))", + "displayTitle": "(1) Raceways Recognized in Chapter 3", + "children": [], + "url": "https://2023.antflix.net#800.110_(A)_(1)" + }, + { + "body": "Wires and cables shall be permitted to be installed in plenum communications raceways, riser communications raceways, and general-purpose communications raceways selected in accordance with Table 800.154(b), listed in accordance with 800.182, and installed in accordance with 800.113 and 362.24 through 362.56, where the requirements applicable to electrical nonmetallic tubing (ENT) apply. [800.110_(A)_(2)](https://2023.antflix.net#800.110_(A)_(2))", + "displayTitle": "(2) Communications Raceways", + "children": [], + "url": "https://2023.antflix.net#800.110_(A)_(2)" + }, + { + "body": "Listed plenum communications raceways, listed riser communications raceways, and listed general-purpose communications raceways selected in accordance with Table 800.154(b) shall be permitted to be installed as innerduct in any type of listed raceway permitted in Chapter 3. [800.110_(A)_(3)](https://2023.antflix.net#800.110_(A)_(3))", + "displayTitle": "(3) Innerduct for Communications Wires and Cables, Coaxial Cables, or Network-Powered Broadband Communications Cables", + "children": [], + "url": "https://2023.antflix.net#800.110_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#800.110_(A)" + }, + { + "body": "The raceway fill requirements of Chapters 3 and 9 shall apply to medium-power network-powered broadband communications cables. [800.110_(B)](https://2023.antflix.net#800.110_(B))", + "displayTitle": "(B) Raceway Fill", + "children": [], + "url": "https://2023.antflix.net#800.110_(B)" + }, + { + "body": "Cables shall be permitted to be installed in plenum cable routing assemblies, riser cable routing assemblies, and general-purpose cable routing assemblies selected in accordance with Table 800.154(c), listed in accordance with 800.182, and installed in accordance with 800.110(C)(1) and (C)(2) and 800.113. [800.110_(C)](https://2023.antflix.net#800.110_(C))", + "displayTitle": "(C) Cable Routing Assemblies", + "children": [ + { + "body": "Cable routing assemblies shall be supported where run horizontally at intervals not to exceed 900 mm (3 ft) and at each end or joint, unless listed for other support intervals. In no case shall the distance between supports exceed 3 m (10 ft). [800.110_(C)_(1)](https://2023.antflix.net#800.110_(C)_(1))", + "displayTitle": "(1) Horizontal Support", + "children": [], + "url": "https://2023.antflix.net#800.110_(C)_(1)" + }, + { + "body": "Vertical runs of cable routing assemblies shall be supported at intervals not exceeding 1.2 m (4 ft), unless listed for other support intervals, and shall not have more than one joint between supports. [800.110_(C)_(2)](https://2023.antflix.net#800.110_(C)_(2))", + "displayTitle": "(2) Vertical Support", + "children": [], + "url": "https://2023.antflix.net#800.110_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#800.110_(C)" + }, + { + "body": "Wires and cables and communications raceways shall be permitted to be installed in metal or listed nonmetallic cable tray systems. Ladder cable trays shall be permitted to support cable routing assemblies. [800.110_(D)](https://2023.antflix.net#800.110_(D))", + "displayTitle": "(D) Cable Trays", + "children": [], + "url": "https://2023.antflix.net#800.110_(D)" + } + ], + "url": "https://2023.antflix.net#800.110" + }, + { + "body": "Installation of wires, cables, cable routing assemblies, and communications raceways shall comply with 800.113(A) through (L). Installation of cable routing assemblies and communications raceways shall comply also with 800.110. Types of cables used by this section are identified in Table 800.113.Table 800.113 Cables Used for Communications Circuits Listed Cable Types Plenum cables CMP, CATVP, BLP, OFNP, OFCP Riser cables CMR, CATVR, BMR, BLR, OFNR, OFCR General-purpose cables CMG, CM, CATV, BM, BL, OFNG, OFN, OFCG, OFC Limited-use cables CMX, CATVX, BLX Undercarpet CMUC Underground BMU, BLU [800.113](https://2023.antflix.net#800.113)", + "displayTitle": "800.113 Installation of Cables Used for Communications Circuits, Communications Wires, Cable Routing Assemblies, and Communications Raceways", + "children": [ + { + "body": "Cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways installed in buildings shall be listed and installed in accordance with the limitations of the listing. Exception: Cables installed in compliance with 800.48 shall not be required to be listed. [800.113_(A)](https://2023.antflix.net#800.113_(A))", + "displayTitle": "(A) Listing", + "children": [], + "url": "https://2023.antflix.net#800.113_(A)" + }, + { + "body": "Installations of cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways in ducts specifically fabricated for environmental air shall be in accordance with 800.113(B)(1) and (B)(2). [800.113_(B)](https://2023.antflix.net#800.113_(B))", + "displayTitle": "(B) Ducts Specifically Fabricated for Environmental Air", + "children": [ + { + "body": "The following cables shall be permitted in ducts specifically fabricated for environmental air as described in 300.22(B) if they are directly associated with the air distribution system: Plenum cables up to 1.22 m (4 ft) in lengthPlenum, rise, general-purpose, and limited-use cables installed in raceways that are installed in compliance with 300.22(B) [800.113_(B)_(1)](https://2023.antflix.net#800.113_(B)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(B)_(1)" + }, + { + "body": "The following cables, wires, cable routing assemblies, and communications raceways shall not be permitted in ducts specifically fabricated for environmental air as described in 300.22(B): Plenum, riser, and general-purpose communications racewaysPlenum, riser, and general-purpose cable routing assembliesRiser, general-purpose, and limited-use cablesType CMUC cables and wiresTypes BMU and BLU cablesCommunications wiresHybrid power and communications cablesInformational Note: See NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, for information on fire protection of wiring installed in fabricated ducts. [800.113_(B)_(2)](https://2023.antflix.net#800.113_(B)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(B)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(B)" + }, + { + "body": "Installations of cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways in other spaces used for environmental air (plenums) shall be in accordance with 800.113(C)(1) and (C)(2). [800.113_(C)](https://2023.antflix.net#800.113_(C))", + "displayTitle": "(C) Other Spaces Used for Environmental Air (Plenums)", + "children": [ + { + "body": "The following cables, wires, cable routing assemblies, and communications raceways shall be permitted in other spaces used for environmental air as described in 300.22(C): Plenum cablesPlenum communications racewaysPlenum cable routing assembliesPlenum cables installed in plenum communications racewaysPlenum cables installed in plenum cable routing assembliesPlenum cables and plenum communications raceways supported by open metal cable tray systemsPlenum, riser, general-purpose, and limited-use cables, and communications wires installed in raceways that are installed in compliance with 300.22(C)Plenum, rise, general-purpose, limited-use cables and plenum, riser, and general-purpose communications raceways supported by solid bottom metal cable trays with solid metal covers in other spaces used for environmental air (plenums) as described in 300.22(C)Plenum, riser, general-purpose, and limited-use cables installed in plenum, riser, and general-purpose communications raceways supported by solid bottom metal cable trays with solid metal covers in other spaces used for environmental air (plenums) as described in 300.22(C) [800.113_(C)_(1)](https://2023.antflix.net#800.113_(C)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(C)_(1)" + }, + { + "body": "The following cables, wires, cable routing assemblies, and communications raceways shall not be permitted in other spaces used for environmental air as described in 300.22(C): Riser, general-purpose, and limited-use cablesRiser and general-purpose communications racewaysRiser and general-purpose cable routing assembliesType CMUC cables and wiresTypes BMR, BM, BMU, and BLU cablesCommunications wiresHybrid power and communications cablesInformational Note: See NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, for information on fire protection of wiring installed in other spaces used for environmental air. [800.113_(C)_(2)](https://2023.antflix.net#800.113_(C)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(C)" + }, + { + "body": "Installations of cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways in risers shall be in accordance with 800.113(D)(1) and (D)(2). [800.113_(D)](https://2023.antflix.net#800.113_(D))", + "displayTitle": "(D) Risers - Cables, Cable Routing Assemblies, and Communications Raceways in Vertical Runs", + "children": [ + { + "body": "The following cables, cable routing assemblies, and communications raceways shall be permitted in vertical runs penetrating one or more floors and in vertical runs in a shaft: Plenum and riser cablesPlenum and riser communications racewaysPlenum and riser cable routing assembliesPlenum and riser cables installed in the following:Plenum communications racewaysRiser communications racewaysPlenum cable routing assembliesRiser cable routing assemblies [800.113_(D)_(1)](https://2023.antflix.net#800.113_(D)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(D)_(1)" + }, + { + "body": "The following cables, wires, cable routing assemblies, and communications raceways shall not be permitted in risers: General-purpose and limited-use cablesGeneral-purpose communications racewaysGeneral-purpose cable routing assembliesType CMUC cables and wiresTypes BMR, BM, BMU, and BLU cablesCommunications wiresHybrid power and communications cablesInformational Note: See 800.26 for firestop requirements for floor penetrations. [800.113_(D)_(2)](https://2023.antflix.net#800.113_(D)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(D)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(D)" + }, + { + "body": "Installations of cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways in metal raceways in a riser having firestops at each floor shall be in accordance with 800.113(E)(1) and (E)(2). [800.113_(E)](https://2023.antflix.net#800.113_(E))", + "displayTitle": "(E) Risers \u2014 Cables and Innerducts in Metal Raceways", + "children": [ + { + "body": "The following cables and innerducts shall be permitted in metal raceways in a riser having firestops at each floor: Plenum, riser, general-purpose, and limited-use cablesPlenum, riser, and general-purpose communications raceways (innerduct)Plenum, riser, general-purpose, and limited-use cables installed in the following:Plenum communications raceways (innerduct)Riser communications raceways (innerduct)General-purpose communications raceways (innerduct) [800.113_(E)_(1)](https://2023.antflix.net#800.113_(E)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(E)_(1)" + }, + { + "body": "The following cables, wires, cable routing assemblies, and communications raceways shall not be permitted in metal raceways in a riser having firestops at each floor: Plenum, riser, and general-purpose cable routing assembliesType CMUC cables and wiresTypes BMR. BM, BMU, and BLU cablesCommunications wiresHybrid power and communications cablesInformational Note: See 800.26 for firestop requirements for floor penetrations. [800.113_(E)_(2)](https://2023.antflix.net#800.113_(E)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(E)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(E)" + }, + { + "body": "Installations of cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways in fireproof riser shafts having firestops at each floor shall be in accordance with 800.113(F)(1) and (F)(2). [800.113_(F)](https://2023.antflix.net#800.113_(F))", + "displayTitle": "(F) Risers \u2014 Cables, Cable Routing Assemblies, and Communications Raceways in Fireproof Shafts", + "children": [ + { + "body": "The following cables, cable routing assemblies, and communications raceways shall be permitted to be installed in fireproof riser shafts having firestops at each floor: Plenum, riser, general-purpose, and limited-use cablesPlenum, riser, and general-purpose communications racewaysPlenum, riser, and general-purpose cable routing assembliesPlenum, riser, general-purpose, and limited-use cables installed in the following:Plenum communications racewaysRiser communications racewaysGeneral-purpose communications racewaysPlenum cable routing assembliesRiser cable routing assembliesGeneral-purpose cable routing assemblies [800.113_(F)_(1)](https://2023.antflix.net#800.113_(F)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(F)_(1)" + }, + { + "body": "The following cables, wires, cable routing assemblies, and communications raceways shall not be permitted in metal raceways in fireproof riser shafts having firestops at each floor: Type CMUC cables and wiresType BMU and BLU cablesCommunications wiresHybrid power and communications cablesInformational Note: See 800.26 for firestop requirements for floor penetrations. [800.113_(F)_(2)](https://2023.antflix.net#800.113_(F)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(F)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(F)" + }, + { + "body": "Installations of cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways in risers in one- and two-family dwellings shafts shall be in accordance with 800.113(G)(1) and (G)(2). [800.113_(G)](https://2023.antflix.net#800.113_(G))", + "displayTitle": "(G) Risers \u2014 One- And Two-Family Dwellings", + "children": [ + { + "body": "The following cables, cable routing assemblies, and communications raceways shall be permitted in one- and two-family dwellings: Plenum, riser, and general-purpose cablesLimited-use cables less than 6 mm (0.25 in.) in diameterPlenum, riser, and general-purpose communications racewaysPlenum, riser, and general-purpose cable routing assembliesPlenum, riser, and general-purpose cables installed in the following:Plenum communications racewaysRiser communications racewaysGeneral-purpose communications racewaysPlenum cable routing assembliesRiser cable routing assembliesGeneral-purpose cable routing assemblies [800.113_(G)_(1)](https://2023.antflix.net#800.113_(G)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(G)_(1)" + }, + { + "body": "The following cables and wires shall not be permitted in risers in one- and two-family dwellings: Type CMUC cables and wiresType BMU and BLU cablesCommunications wiresHybrid power and communications cables [800.113_(G)_(2)](https://2023.antflix.net#800.113_(G)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(G)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(G)" + }, + { + "body": "Installations of cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways supported by cable trays shall be in accordance with 800.113(H)(1) and (H)(2). [800.113_(H)](https://2023.antflix.net#800.113_(H))", + "displayTitle": "(H) Cable Trays", + "children": [ + { + "body": "The following wires, cables, and communications raceways shall be permitted to be supported by cable trays: Plenum, riser, and general-purpose cablesPlenum, riser, and general-purpose communications racewaysCommunications wires, plenum, riser, and general-purpose cables installed in the following:Plenum communications racewaysRiser communications raceways.General-purpose communications raceways [800.113_(H)_(1)](https://2023.antflix.net#800.113_(H)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(H)_(1)" + }, + { + "body": "The following cables and wires shall not be supported by cable trays: Limited-use cablesType CMUC cables and wiresType BMU and BLU cablesCommunications wiresHybrid power and communications cables [800.113_(H)_(2)](https://2023.antflix.net#800.113_(H)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(H)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(H)" + }, + { + "body": "Installations of cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways in distributing frames and cross-connect arrays shall be in accordance with 800.113(I)(1) and (I)(2). [800.113_(I)](https://2023.antflix.net#800.113_(I))", + "displayTitle": "(I) Distributing Frames and Cross-Connect Arrays", + "children": [ + { + "body": "The following wires, cables, cable routing assemblies, and communications raceways shall be permitted to be installed in distributing frames and cross-connect arrays: Plenum, riser, and general-purpose cables and communications wiresPlenum, riser, and general-purpose communications racewaysPlenum, riser, and general-purpose cable routing assembliesCommunications wires, plenum, riser, and general-purpose cables installed in the following:Plenum communications racewaysRiser communications racewaysGeneral-purpose communications racewaysPlenum cable routing assembliesRiser cable routing assembliesGeneral-purpose cable routing assemblies [800.113_(I)_(1)](https://2023.antflix.net#800.113_(I)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(I)_(1)" + }, + { + "body": "The following cables and wires shall not be installed in distributing frames and cross-connect arrays: Types BMR, BM, BMU, and BLU cablesLimited-use cablesType CMUC cables and wiresHybrid power and communications cables [800.113_(I)_(2)](https://2023.antflix.net#800.113_(I)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(I)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(I)" + }, + { + "body": "Installations of cables used for communications circuits, cable communications wires, routing assemblies, and communications raceways in building locations other than those covered in 800.113(B) through (I) shall be in accordance with 800.113 (J)(1) and (J)(2). [800.113_(J)](https://2023.antflix.net#800.113_(J))", + "displayTitle": "(J) Other Building Locations", + "children": [ + { + "body": "The following wires, cables, cable routing assemblies, and communications raceways shall be permitted to be installed in building locations other than the locations covered in 800.113(B) through (I): Plenum, riser, and general-purpose cablesLimited-use cables with a maximum of 3 m (10 ft) of exposed length in nonconcealed spacesPlenum, riser, and general-purpose communications racewaysPlenum, riser, and general-purpose cable routing assembliesCommunications wires, plenum, riser, and general-purpose cables installed in the following:Plenum communications racewaysRiser communications racewaysGeneral-purpose communications racewaysPlenum, riser, and general-purpose cables installed in the following:Plenum cable routing assembliesRiser cable routing assembliesGeneral-purpose cable routing assembliesCommunications wires and plenum, riser, general-purpose, and limited-use cables installed in raceways recognized in Chapter 3Type CMUC undercarpet communications wires and cables installed under carpet, modular flooring, and planks [800.113_(J)_(1)](https://2023.antflix.net#800.113_(J)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(J)_(1)" + }, + { + "body": "The following cables, wires, cable routing assemblies, and communications raceways shall not be installed in building locations other than the locations covered in 800.113(B) through (I): Types BMU and BLU cablesCommunications wiresHybrid power and communications cables [800.113_(J)_(2)](https://2023.antflix.net#800.113_(J)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(J)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(J)" + }, + { + "body": "Installations of cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways in multifamily dwellings shall be in accordance with 800.113(K)(1) and (K)(2). [800.113_(K)](https://2023.antflix.net#800.113_(K))", + "displayTitle": "(K) Multifamily Dwellings", + "children": [ + { + "body": "The following cables, cable routing assemblies, and communications raceways shall be permitted to be installed in multifamily dwellings in locations other than the locations covered in 800.113(B) through (G): Plenum, riser, and general-purpose cablesLimited-use cables less than 6 mm (0.25 in.) in diameter in nonconcealed spacesPlenum, riser, and general-purpose communications racewaysPlenum, riser, and general-purpose cable routing assembliesCommunications wires and plenum, riser, and general-purpose cables installed in the following:Plenum communications racewaysRiser communications racewaysGeneral-purpose communications racewaysPlenum, riser, and general-purpose cables installed in the following:Plenum cable routing assembliesRiser cable routing assembliesGeneral-purpose cable routing assembliesCommunications wires and plenum, riser, general-purpose, and limited-use cables installed in raceways recognized in Chapter 3Type CMUC under-carpet communications wires and cables installed under carpet, modular flooring, and planks [800.113_(K)_(1)](https://2023.antflix.net#800.113_(K)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(K)_(1)" + }, + { + "body": "The following cables, cable routing assemblies, and communications raceways shall not be installed in multifamily dwellings in locations other than the locations covered in 800.113(B) through (G): Types BMU and BLU cablesCommunications wiresHybrid power and communications cables [800.113_(K)_(2)](https://2023.antflix.net#800.113_(K)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(K)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(K)" + }, + { + "body": "Installations of cables used for communications circuits, communications wires, cable routing assemblies, and communications raceways in one- and two-family dwellings in locations other than those covered in 800.113(B) through (F) shall be in accordance with 800.113(L)(1) and (L)(2). [800.113_(L)](https://2023.antflix.net#800.113_(L))", + "displayTitle": "(L) One- And Two-Family Dwellings", + "children": [ + { + "body": "The following wires, cables, cable routing assemblies, and communications raceways shall be permitted to be installed in one- and two-family dwellings in locations other than the locations covered in 800.113(B) through (F): Plenum, riser, and general-purpose cablesLimited-use cables less than 6 mm (0.25 in.) in diameterPlenum, riser, and general-purpose communications racewaysPlenum, riser, and general-purpose cable routing assembliesCommunications wires, plenum, riser, and general-purpose cables installed in the following:Plenum communications racewaysRiser communications racewaysGeneral-purpose communications racewaysPlenum, riser, and general-purpose cables installed in the following:Plenum cable routing assembliesRiser cable routing assembliesGeneral-purpose cable routing assembliesCommunications wires and plenum, riser, general-purpose, and limited-use cables installed in raceways recognized in Chapter 3Type CMUC under-carpet communications wires and cables installed under carpet, modular flooring, and planksHybrid power and communications cable listed in accordance with 800.179 [800.113_(L)_(1)](https://2023.antflix.net#800.113_(L)_(1))", + "displayTitle": "(1) Uses Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(L)_(1)" + }, + { + "body": "The following cables, wires, cable routing assemblies, and communications raceways shall not be installed in one- and two-family dwellings in locations other than those covered in 800.113(B) through (F): Types BMU and BLU cablesCommunications wires [800.113_(L)_(2)](https://2023.antflix.net#800.113_(L)_(2))", + "displayTitle": "(2) Uses Not Permitted", + "children": [], + "url": "https://2023.antflix.net#800.113_(L)_(2)" + } + ], + "url": "https://2023.antflix.net#800.113_(L)" + } + ], + "url": "https://2023.antflix.net#800.113" + }, + { + "body": "Installation of communications wires and cables, from the protector to the equipment, or where no protector is required, communications wires and cables attached to the outside or inside of the building, shall comply with 800.133(A) and 800.133(B). Installation of CATV-type coaxial cables, beyond the point of grounding as defined in 820.93, shall comply with 800.133(A) through (C). [800.133](https://2023.antflix.net#800.133)", + "displayTitle": "800.133 Installation of Communications Wires and Cables and CATV-type Coaxial Cables", + "children": [ + { + "displayTitle": "(A) In Raceways, Cable Trays, Boxes, Cables, Enclosures, and Cable Routing Assemblies", + "children": [ + { + "body": "Communications cables and CATV-type coaxial cables shall be permitted in the same raceway, cable tray, box, enclosure, or cable routing assembly together and with jacketed cables of any of the following: Class 2 and Class 3 remote-control, signaling, and power-limited circuits in compliance with 645.5(E)(2) or Parts I and II of Article 725Power-limited fire alarm systems in compliance with Parts I and III of Article 760Nonconductive and conductive optical fiber cables in compliance with Parts I and V of Article 770Communications circuits in compliance with Parts I and IV of Articles 800 and 805Community antenna television and radio distribution systems in compliance with Parts I and V of Articles 800 and 820Low-power network-powered broadband communications circuits in compliance with Parts I and V of Articles 800 and 830 [800.133_(A)_(1)](https://2023.antflix.net#800.133_(A)_(1))", + "displayTitle": "(1) Other Circuits", + "children": [], + "url": "https://2023.antflix.net#800.133_(A)_(1)" + }, + { + "body": "Class 1 circuits shall not be run in the same cable with communications circuits. Class 2 and Class 3 circuit conductors shall be permitted in the same listed communications cable with communications circuits. [800.133_(A)_(2)](https://2023.antflix.net#800.133_(A)_(2))", + "displayTitle": "(2) Class 2 and Class 3 Circuits", + "children": [], + "url": "https://2023.antflix.net#800.133_(A)_(2)" + }, + { + "body": "Communications wires and cables and CATV-type coaxial cables shall not be placed in any raceway, compartment, outlet box, junction box, or similar fitting with conductors of electric light, power, Class 1, non-power-limited fire alarm, or medium-power network-powered broadband communications circuits.\nException No. 1: Communications wires and cables and CATV-type coaxial cables shall be permitted to be placed in any raceway, compartment, outlet box, junction box, or other enclosures with conductors of electric light, power, Class 1, non-power-limited fire alarm., or medium-power network-powered broadband communications circuits where all of the conductors of electric light, power, Class 1, non-power-limited fire alarm, and medium-power network-powered broadband communications circuits are separated from all of the communications wires and cables and CATV-type coaxial cables by a permanent barrier or listed divider.\nException No. 2: Communications wires and cables and CATV-type coaxial cables shall be permitted to be placed in outlet boxes, junction boxes, or similar fittings or compartments with power conductors where such conductors are introduced solely for power supply to the communications and coaxial cable system distribution equipment. The power circuit conductors shall be routed within the enclosure to maintain a minimum 6 mm (1/4 in.) separation from the communications wires and cables and the CATV-type coaxial cables.\nException No. 3: Separation of circuits shall not be required in elevator traveling cables constructed in accordance with by 620.36. [800.133_(A)_(3)](https://2023.antflix.net#800.133_(A)_(3))", + "displayTitle": "(3) Electric Light, Power, Class 1, Non-Power-Limited Fire Alarm, and Medium-Power Network-Powered Broadband Communications Circuits in Raceways, Compartments, and Boxes", + "children": [], + "url": "https://2023.antflix.net#800.133_(A)_(3)" + } + ], + "url": "https://2023.antflix.net#800.133_(A)" + }, + { + "body": "Communications wires and cables and CATV-type coaxial cables shall be separated at least 50 mm (2 in.) from conductors of any electric light, power, Class 1, non\u2014power-limited fire alarm, or medium-power network-powered broadband communications circuits.\nException No. 1: Separation shall not be required where either (1) all of the conductors of electric light, power, Class 1, non-power-limited fire alarm, and medium-power network-powered broadband communications circuits are in a raceway or in metal-sheathed, metal-clad, nonmetallic-sheathed, Type AC or Type UF cables, or (2) all of the communications wires and cables and all of the CATV-type coaxial cables are encased in raceway.\nException No. 2: Separation shall not be required where the communications wires and cables and CATV-type coaxial cables are permanently separated from the conductors of electric light, power, Class 1, non-power-limited fire alarm, and medium-power network-powered broadband communications circuits by a continuous and firmly fixed nonconductor, such as porcelain lubes or flexible tubing, in addition to the insulation on the wire. [800.133_(B)](https://2023.antflix.net#800.133_(B))", + "displayTitle": "(B) Other Applications", + "children": [], + "url": "https://2023.antflix.net#800.133_(B)" + }, + { + "body": "Raceways shall be used for their intended purpose. Communications wires and cables and CATV-type coaxial cables shall not be strapped, taped, or attached by any means to the exterior of any raceway as a means of support. Exception: Overhead (aerial) spans of communications drop wires, communications cables, and CATV-type coaxial cables shall be permitted to be attached to the exterior of a raceway-type mast intended for the attachment and support of such wires and cables. [800.133_(C)](https://2023.antflix.net#800.133_(C))", + "displayTitle": "(C) Support of Communications Wires and Cables and CATV-type Coaxial Cables", + "children": [], + "url": "https://2023.antflix.net#800.133_(C)" + } + ], + "url": "https://2023.antflix.net#800.133" + }, + { + "body": "Permitted and nonpermitted applications of listed communications wires, cables, coaxial cables, network-powered broadband communications system cables and raceways, and listed cable routing assemblies, shall be in accordance with one of the following: Listed communications wires and cables as indicated in Table 800.154(a)Listed communications raceways as indicated in Table 800.154(b)Listed cable routing assemblies as indicated in Table 800.154(c)The permitted applications shall be subject to the installation requirements of 800.110 and 800.113.Table 800.154(a) Applications of Listed Communications Wires, Cables, and Network-Powered Broadband Communications System Cables in Buildings Applications Wire and Cable Type Plenum Riser BMR General-Purpose BM Limited-Use Undercarpet BMU, BLU Hybrid Power and Communications Cables Communications Wires In ducts specifically fabricated for environmental air as described in 300.22(B) In fabricated ducts Y N N N N N N N N N In metal raceway that complies with 300.22(B) Y Y Y Y Y Y N N N Y In other spaces used for environmental air (plenums) as described in 300.22(C) In other spaces used for environmental air Y N N N N N N N N N In metal raceway that complies with 300.22(C) Y Y Y Y Y Y N N N Y In plenum communications raceways Y N N N N N N N N N In plenum cable routing assemblies Y N N N N N N N N N Supported by open metal cable trays Y N N N N N N N N N Supported by solid bottom metal cable trays with solid metal covers Y Y Y Y Y Y N N N N In risers In vertical runs Y Y Y N N N N N N N In metal raceways Y Y Y Y Y Y N N N N In fireproof shafts Y Y Y Y Y Y N N N N In plenum communications raceways Y Y N N N N N N N N In plenum cable routing assemblies Y Y N N N N N N N N In riser communications raceways Y Y N N N N N N N N In riser cable routing assemblies Y Y N N N N N N N N In one- and two- family dwellings Y Y Y Y Y Y N N Y N Within buildings in other than air-handling spaces and risers General Y Y Y Y Y Y N N N N In one- and two- family dwellings Y Y Y Y Y Y Y N Y N In multifamily dwellings Y Y Y Y Y Y Y N N N In nonconcealed spaces Y Y Y Y Y Y Y N N N Supported by cable trays Y Y Y Y Y N N N N N Under carpet, modular flooring, and planks N N N N N N Y N N N In distributing frames and cross-connect arrays Y Y N Y N N N N N Y In rigid metal conduit (RMC) and intermediate metal conduit (IMC) Y Y Y Y Y Y Y Y Y Y In any raceway recognized in Chapter 3 Y Y Y Y Y Y N N N Y In plenum communications raceways Y Y N Y N N N N N Y In plenum cable routing assemblies Y Y N Y N N N N N Y In riser communications raceways Y Y N Y N N N N N Y In riser cable routing assemblies Y Y N Y N N N N N Y In general-purpose communications raceways Y Y N Y N N N N N Y In general-purpose cable routing assemblies Y Y N Y N N N N N Y Note: An \"N\" in the table indicates that the cable type shall not be installed in the application. A \"Y\" indicates that the cable type shall be permitted to be installed in the application subject to the limitations described in 800.113. The Riser column includes all riser cables except BMR, and the General-Purpose column includes all general-purpose cables except BM.Table 800.154(b) Applications of Listed Communications Raceways in Buildings Applications Listed Communications Raceway Type Plenum Riser General-Purpose In ducts specifically fabricated for environmental air as described in 300.22(B) In fabricated ducts N N N In metal raceway that complies with 300.22(B) N N N In other spaces used for environmental air (plenums) as described in 300.22(C) In other spaces used for environmental air Y N N In metal raceway that complies with 300.22(C) Y Y Y In plenum cable routing assemblies N N N Supported by open metal cable trays Y N N Supported by solid bottom metal cable trays with solid metal covers Y Y Y In risers In vertical runs Y Y N In metal raceways Y Y Y In fireproof shafts Y Y Y In plenum cable routing assemblies N N N In riser cable routing assemblies N N N In one- and two-family dwellings Y Y Y Within buildings in other than air-handling spaces and risers General Y Y Y In one- and two-family dwellings Y Y Y In multifamily dwellings Y Y Y In nonconcealed spaces Y Y Y Supported by cable trays Y Y Y Under carpet, modular flooring, and planks N N N In distributing frames and cross-connect arrays Y Y Y In any raceway recognized in Chapter 3 Y Y Y In plenum cable routing assemblies N N N In riser cable routing assemblies N N N In general-purpose cable routing assemblies N N N Note: An \"N\" in the table indicates that the communications raceway type shall not be installed in the application. A \"Y\" indicates that the communications raceway type shall be permitted to be installed in the application, subject to the limitations described in 800.110 and 800.113.Table 800.154(c) Applications of Listed Cable Routing Assemblies in Buildings Applications Listed Cable Routing Assembly Type Plenum Riser General-Purpose In ducts specifically fabricated for environmental air as described in 300.22(B) In fabricated ducts N N N In metal raceway that complies with 300.22(B) N N N In other spaces used for environmental air (plenums) as described in 300.22(C) In other spaces used for environmental air Y N N In metal raceway that complies with 300.22(C) N N N In plenum communications raceways N N N Supported by open metal cable trays Y N N Supported by solid bottom metal cable trays with solid metal covers N N N In risers In vertical runs Y Y N In metal raceways N N N In fireproof shafts Y Y Y In plenum communications raceways N N N In riser communications raceways N N N In one- and two-family dwellings Y Y Y Within buildings in other than air-handling spaces and risers General Y Y Y In one- and two-family dwellings Y Y Y In multifamily dwellings Y Y Y In nonconcealed spaces Y Y Y Supported by cable trays Y Y Y Under carpet, modular flooring, and planks N N N In distributing frames and cross-connect arrays Y Y Y In any raceway recognized in Chapter 3 N N N In plenum communications raceways N N N In riser communications raceways N N N In general-purpose communications raceways N N N Note: An \"N\" in the table indicates that the cable routing assembly type shall not be installed in the application. A \"Y\" indicates that the cable routing assembly type shall be permitted to be installed in the application subject to the limitations described in 800.113.\nInformational Note No. 1: Part IV of Article 800 covers installation methods within buildings. This table covers the applications of listed communications wires, cables, and raceways in buildings. Informational Note No. 2: For information on the restrictions to the installation of communications cables in fabricated ducts, see 800.113(B). [800.154](https://2023.antflix.net#800.154)", + "displayTitle": "800.154 Applications of Listed Communications Wires, Cables, and Raceways, and Listed Cable Routing Assemblies", + "children": [], + "url": "https://2023.antflix.net#800.154" + }, + { + "displayTitle": "Part V Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_31_V" + }, + { + "body": "Cable lies intended for use in other space used for environmental air (plenums) shall be listed as having low smoke and heat release properties. Informational Note: See NFPA 90A-2018, Standard for the Installation of Air-Conditioning and Ventilating Systems, and ANSI/ UL 2043-2013, Standard for Safety Tire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces, for information on listing discrete products as having low smoke and heat release properties. [800.170](https://2023.antflix.net#800.170)", + "displayTitle": "800.170 Plenum Cable Ties", + "children": [], + "url": "https://2023.antflix.net#800.170" + }, + { + "body": "Communications equipment shall be listed as being suitable for electrical connection to a communications network. Informational Note No. 1: See ANSI/UL 60950-1-2014, Standard for Safety of Information Technology Equipment, ANSI/ UL 1863-2012, Standard for Safety Communications Circuit Accessories, or ANSI/UL 62368-1-2014 or ANSI/UL 62368-1-2018, Audio/Video, Information and Communication Technology Equipment - Part 1: Safety Requirements. Informational Note No. 2: See ANSI/ATIS 0600337-2016, Requirements for Maximum Voltage, Current, and Power Levels Used in Communications Circuits, for additional information regarding voltages, currents, and power allowed on communications circuits. [800.171](https://2023.antflix.net#800.171)", + "displayTitle": "800.171 Communications Equipment", + "children": [], + "url": "https://2023.antflix.net#800.171" + }, + { + "body": "Communications wires and cables, community antenna television cables, and network-powered broadband communications cables shall be listed in accordance with 800.179(A) through (L) and shall have a temperature rating of not less than 60\u00b0C (140\u00b0F). The temperature rating shall be marked on the jacket of cables that have a temperature rating exceeding 60\u00b0C (140\u00b0F). Conductors in communications cables, other than in a coaxial cable, shall be copper. Cables shall be permitted to contain optical fibers. Cables containing optical fibers shall be marked with the suffix \"-OF.\" Communications wires and cables and network-powered communications cables shall have a voltage rating of not less than 300 volts; the insulation for the individual conductors, other than the outer conductor of a coaxial cable, shall be rated for 300 volts minimum. The cable voltage rating shall not be marked on the cable or on the under-carpet communications wire. Exception: Voltage markings shall be permitted where the cable has multiple listings and voltage marking is required for one or more of the listings. Informational Note No. 1: Voltage markings on cables could be misinterpreted to suggest that the cables may be suitable for Class 1, electric light, and power applications. Informational Note No. 2: See UL 444-2017, Standard for Communications Cables, for information on communications cables. Informational Note No. 3: See UL1655-2009, Standard for Community-Antenna Television Cables, for information on community-antenna television cables. [800.179](https://2023.antflix.net#800.179)", + "displayTitle": "800.179 Wires and Cables", + "children": [ + { + "body": "Type CMP communications plenum cables, Type CATVP community antenna television plenum coaxial cables, and Type BLP network-powered broadband communication low-power plenum cables shall be listed as being suitable for use in ducts, plenums, and other spaces used for environmental air and shall also be listed as having adequate fire-resistant and low-smoke-producing characteristics. Informational Note: See NFPA 262-2019, Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air-Handling Spaces, for one method of defining a cable that is low-smoke-producing cable and fire-resistant cable so that the cable exhibits a maximum peak optical density of 0.50 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.52 m (5 ft). [800.179_(A)](https://2023.antflix.net#800.179_(A))", + "displayTitle": "(A) Plenum Cables", + "children": [], + "url": "https://2023.antflix.net#800.179_(A)" + }, + { + "body": "Type CMR communications riser cables, Type CATVR community antenna television riser coaxial cables, Type BMR network-powered broadband communications medium-power riser cables, and Type BLR network-powered broadband communications low-power riser cables shall be listed as being suitable for use in a vertical run in a shaft or from floor to floor and shall also be listed as having fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. Informational Note: See ANSI/UL 1666-2017, Standard Test for Flame Propagation Height of Electrical and Optical-Fiber Cable Installed Vertically in Shafts, for one method of defining fire-resistant characteristics of the cable capable of preventing the carrying of fire from floor to floor. [800.179_(B)](https://2023.antflix.net#800.179_(B))", + "displayTitle": "(B) Riser Cables", + "children": [], + "url": "https://2023.antflix.net#800.179_(B)" + }, + { + "displayTitle": "(C) General-Purpose Cables", + "children": [ + { + "body": "Type CMG communications general-purpose cables shall be listed as being suitable for general-purpose use, with the exception of risers and plenums, and shall also be listed as being resistant to the spread of fire. Informational Note: See CSA Vertical Flame Test - Cables in Cable Trays as described in CSA C22.2 No. 0.3-09 (R2019), Test Methods for Electrical Wires and Cables, for one method of defining resistance to the spread of fire where the damage (char length) of the cable does not exceed 1.5 m (4 ft 11 in.) or FT4 Flame Test in ANSI/UL 1685-2015, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables. The smoke measurements in the test methods are not applicable. [800.179_(C)_(1)](https://2023.antflix.net#800.179_(C)_(1))", + "displayTitle": "(1) Type CMG", + "children": [], + "url": "https://2023.antflix.net#800.179_(C)_(1)" + }, + { + "body": "Type CM communications general-purpose cables, Type CATV community antenna television coaxial general-purpose cables, Type BM network-powered broadband communications medium-power general-purpose cables, and Type BL network-powered broadband communications low-power general-purpose cables shall be listed as being suitable for general-purpose use, with the exception of risers and plenums, and shall also be listed as being resistant to the spread of fire. Informational Note: See UL Flame Exposure in ANSI/ UL 1685-2015, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables, for one method of defining resistance to the spread of fire where the damage (char length) of the cable does not to exceed 244 cm (8 ft 0 in.). The smoke measurements in the test method are not applicable. [800.179_(C)_(2)](https://2023.antflix.net#800.179_(C)_(2))", + "displayTitle": "(2) Types cm, CATV, BM, and BL", + "children": [], + "url": "https://2023.antflix.net#800.179_(C)_(2)" + } + ], + "url": "https://2023.antflix.net#800.179_(C)" + }, + { + "body": "Type CMX limited-use communications cables, Type CATVX limited-use community antenna television coaxial cables, and Type BLX limited-use network-powered broadband low-power cables shall be listed as being suitable for use in dwellings and for use in raceway and shall also be listed as being resistant to flame spread. Informational Note: See ANSI/UL 2556, Standard for Wire and Cable Test Method, for one method of determining that cable is resistant to flame spread is by testing the cable to the FV-2/VW-1 flame test. [800.179_(D)](https://2023.antflix.net#800.179_(D))", + "displayTitle": "(D) Limited-Use Cables", + "children": [], + "url": "https://2023.antflix.net#800.179_(D)" + }, + { + "body": "Cables that are used for survivability of critical circuits under fire conditions shall be listed and meet either 800.179(E)(1), (E)(2), or (E)(3). [800.179_(E)](https://2023.antflix.net#800.179_(E))", + "displayTitle": "(E) Circuit Integrity (CI) Cable, Fire-Resistive Cable System, or Electrical Circuit Protective System", + "children": [ + { + "body": "Cables specified in 800.179(A) through (C) and used for survivability of critical circuits shall be marked with the additional classification using the suffix \"CI.\" In order to maintain its listed lire rating, CI cable shall only be installed in free air in accordance with 800.24. CI cables shall only be permitted to be installed in a raceway where specifically listed and marked as part of a fire-resistive cable system as covered in 800.179(E)(2). Informational Note: See UL 2196, Standard for Fire Test for Circuit Integrity of Fire-Resistant Power, Instrumentation, Control, and Data Cables, for one method of defining CI cable by establishing a minimum 2-hour fire resistance rating for the cable as specified in UL 444, Standard for Safety Communications Cables. [800.179_(E)_(1)](https://2023.antflix.net#800.179_(E)_(1))", + "displayTitle": "(1) CI Cables", + "children": [], + "url": "https://2023.antflix.net#800.179_(E)_(1)" + }, + { + "body": "Cables specified in 800.179(A) through (C) and 800.179(E)(1) that are part of an electrical circuit protective system shall be fire-resistive cable identified with the protective system number on the product, or on the smallest unit container in which the product is packaged, and shall be installed in accordance with the listing of the protective system. Informational Note No. 1: See UL 2196, Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for one method of defining an electrical circuit protective system rating for the system. UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information to identify the system and its installation limitations to maintain a minimum fire-resistive rating. Informational Note No. 2: The listing organization provides information for electrical circuit protective systems (FHIT), including installation requirements for maintaining the fire rating. [800.179_(E)_(2)](https://2023.antflix.net#800.179_(E)_(2))", + "displayTitle": "(2) Fire-Resistive Cable Systems", + "children": [], + "url": "https://2023.antflix.net#800.179_(E)_(2)" + }, + { + "body": "Protectants for cables specified in 800.179(A) through (E), which are part of an electrical circuit protective system, shall be identified with the protective system identifier and hourly rating marked on the protectant or the smallest unit container and installed in accordance with the listing of the system. Informational Note: See UL 1724, Fire Tests for Electrical Circuit Protective Systems, for one method of defining an electrical circuit protective system. UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information to identify the system and its installation limitations to maintain the fire-resistive rating. [800.179_(E)_(3)](https://2023.antflix.net#800.179_(E)_(3))", + "displayTitle": "(3) Electrical Circuit Protective System", + "children": [], + "url": "https://2023.antflix.net#800.179_(E)_(3)" + } + ], + "url": "https://2023.antflix.net#800.179_(E)" + }, + { + "body": "Types CMP-LP, CMR-LP, CMG-LP, and CM-LP communications limited power cables shall be listed as suitable for carrying power and data up to a specified current limit for each conductor without exceeding the temperature rating of the cable where the cable is installed in cable bundles in free air or installed within a raceway, cable tray, or cable routing assembly. The cables shall be marked with the suffix \"-LP(XXA),\" where XX designates the current limit in amperes per conductor. Informational Note: An example of the marking on a communications cable with an LP rating is \"CMP-LP (0.6A) (75\u00b0C) 23 AWG 4 pair,\" which indicates that it is a 4-pair plenum cable with 23 AWG conductors, a temperature rating of 75\u00b0C, and a current limit of 0.6 amperes. [800.179_(F)](https://2023.antflix.net#800.179_(F))", + "displayTitle": "(F) Types CMP-LP, CMR-LP, CMG-LP, and CM-LP Limited Power (LP) Cables", + "children": [], + "url": "https://2023.antflix.net#800.179_(F)" + }, + { + "body": "Type CMUC undercarpet communications wires and cables shall be listed as being suitable for undercarpet use and shall also be listed as being resistant to flame spread. Informational Note: See ANSI/UL 2556, Standard for Wire and Cable Test Methods, for one method of determining that cable is resistant to flame spread in accordance with the FV-2/VW-1 flame test. [800.179_(G)](https://2023.antflix.net#800.179_(G))", + "displayTitle": "(G) Type CMUC Undercarpet Wires and Cables", + "children": [], + "url": "https://2023.antflix.net#800.179_(G)" + }, + { + "body": "Communications wires, such as distributing frame wire and jumper wire, shall be listed as being resistant to the spread of fire. Informational Note No. 1: See UL Flame Exposure, Vertical Flame Tray Test in ANSI/UL 1685-2015, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release lest for Electrical and Optical-Fiber Cables, for one method of defining cable flame resistance to the spread of fire where the cables do not spread fire to the top of the tray. The smoke measurements in the test method are not applicable. Informational Note No. 2: See CSA Vertical Flame Test - Cables in Cable Trays, as described in CSA C22.2 No. 0.3-09 (R2019), Test Methods for Electrical Wires and Cables, for another method of defining resistance to the spread of fire is for the damage (char length) of the cable to not exceed 1.5 m (4 ft 11 in.). [800.179_(H)](https://2023.antflix.net#800.179_(H))", + "displayTitle": "(H) Communications Wires", + "children": [], + "url": "https://2023.antflix.net#800.179_(H)" + }, + { + "body": "Cables shall be permitted to be surface marked to indicate special characteristics of the cable materials. Informational Note: These markings can include, but are not limited to, markings for limited-smoke, halogen-free, low-smoke halogen-free, and sunlight resistance. [800.179_(I)](https://2023.antflix.net#800.179_(I))", + "displayTitle": "(I) Optional Markings", + "children": [], + "url": "https://2023.antflix.net#800.179_(I)" + } + ], + "url": "https://2023.antflix.net#800.179" + }, + { + "body": "Where bonding or grounding is required, devices used to connect a shield, a sheath, or noncurrent-carrying metallic members of a cable to a bonding conductor or grounding electrode conductor shall be listed or be part of listed equipment. [800.180](https://2023.antflix.net#800.180)", + "displayTitle": "800.180 Grounding Devices", + "children": [], + "url": "https://2023.antflix.net#800.180" + }, + { + "body": "Cable routing assemblies and communications raceways shall be listed in accordance with 800.182(A) through (C). Cable routing assemblies shall be marked in accordance with Table 800.182(a). Communications raceways shall be marked in accordance with Table 800.182(b). Informational Note: See ANSI/UL 2024-5-2015, Cable Routing Assemblies and Communications Raceways, for information on listing requirements for both communications raceways and cable routing assemblies. [800.182](https://2023.antflix.net#800.182)", + "displayTitle": "800.182 Cable Routing Assemblies and Communications Raceways", + "children": [ + { + "body": "Plenum cable routing assemblies and plenum communications raceways shall be listed as having adequate fire-resistant and low-smoke-producing characteristics. Informational Note No. 1: See ASTM E84-19B, Standard lest Method for Surface Burning Characteristics of Building Materials, or ANSI/UL 723-2018, Standard Test Method for Surface Burning Characteristics of Building Materials, for one method of defining cable routing assemblies and communications raceways that have adequate fire-resistant and low-smoke-producing characteristics and exhibit a maximum flame spread index of 25 and a maximum smoke developed index of 50. Informational Note No. 2: See NFPA 262-2019, Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air-Handling Spaces, for another method of defining communications raceways that have adequate fire-resistant and low-smoke-producing characteristics and exhibit a maximum peak optical density of 0.50 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.52 m (5 ft) or less. Informational Note No. 3: See 4.3.11.2.6 or 4.3.11.5.5 of NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, for information on materials exposed to the airflow in ceiling cavity and raised floor plenums.\n\n\nTable 800.182(a) Cable Routing Assembly Markings Type Marking Plenum Cable Routing Assembly Plenum Cable Routing Assembly Riser Cable Routing Assembly Riser Cable Routing Assembly General-Purpose Cable Routing Assembly General-Purpose Cable Routing Assembly [800.182_(A)](https://2023.antflix.net#800.182_(A))", + "displayTitle": "(A) Plenum Cable Routing Assemblies and Plenum Communications Raceways", + "children": [], + "url": "https://2023.antflix.net#800.182_(A)" + }, + { + "body": "Riser cable routing assemblies and riser communications raceways shall be listed as having adequate fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. Informational Note: See ANSI/UL 1666-2017, Standard Test for Flame Propagation Height of Electrical and Optical Fiber Cable Installed Vertically in Shafts, for one method of defining fire-resistant characteristics capable of preventing the carrying of fire from floor to floor of the cable routing assemblies and communications raceways.Table 800.182(b) Communications Raceway Markings Type Marking Plenum Communications Raceway Plenum Communications Raceway Riser Communications Raceway Riser Communications Raceway General-Purpose Communications Raceway General-Purpose Communications Raceway [800.182_(B)](https://2023.antflix.net#800.182_(B))", + "displayTitle": "(B) Riser Cable Routing Assemblies and Riser Communications Raceways", + "children": [], + "url": "https://2023.antflix.net#800.182_(B)" + }, + { + "body": "General-purpose cable routing assemblies and general-purpose communications raceways shall be listed as being resistant to the spread of fire. Informational Note: See ANSI/UL 1685-2015, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables, for one method of defining resistance to the spread of fire where the cable routing assemblies and communications raceways do not spread fire to the top of the tray. [800.182_(C)](https://2023.antflix.net#800.182_(C))", + "displayTitle": "(C) General-Purpose Cable Routing Assemblies and General-Purpose Communications Raceways", + "children": [], + "url": "https://2023.antflix.net#800.182_(C)" + } + ], + "url": "https://2023.antflix.net#800.182" + } + ], + "url": "https://2023.antflix.net#800" + }, + { + "displayTitle": "Article 805 Communications Circuits", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_119_I" + }, + { + "body": "This article covers communications circuits and equipment. [805.1](https://2023.antflix.net#805.1)", + "displayTitle": "805.1 Scope", + "children": [], + "url": "https://2023.antflix.net#805.1" + }, + { + "body": "Equipment electrically connected to a communications network shall be listed in accordance with 800.171. Exception: This listing requirement shall not apply to test equipment that is intended for temporary connection to a telecommunications network by qualified persons during the course of installation, maintenance, or repair of telecommunications equipment or systems. [805.18](https://2023.antflix.net#805.18)", + "displayTitle": "805.18 Installation of Equipment", + "children": [], + "url": "https://2023.antflix.net#805.18" + }, + { + "displayTitle": "Part II Wires and Cables Outside and Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_119_II" + }, + { + "body": "Where the entire street circuit is run underground and the circuit within the block is placed so as to be free from the likelihood of accidental contact with electric light or power circuits of over 300 volts to ground, the insulation requirements of 805.50(A) and 805.50(C) shall not apply, insulating supports shall not be required for the conductors, and bushings shall not be required where the conductors enter the building. [805.47](https://2023.antflix.net#805.47)", + "displayTitle": "805.47 Underground Communications Wires and Cables Entering Buildings \u2014 Underground Block Distribution", + "children": [], + "url": "https://2023.antflix.net#805.47" + }, + { + "body": "Circuits that require primary protectors as provided in 805.90 shall comply with 805.50(A),805.50(B), and 805.50(C). [805.50](https://2023.antflix.net#805.50)", + "displayTitle": "805.50 Circuits Requiring Primary Protectors", + "children": [ + { + "body": "Communications wires and cables without a metal shield, running from the last outdoor support to the primary protector, shall be listed in accordance with 805.173. [805.50_(A)](https://2023.antflix.net#805.50_(A))", + "displayTitle": "(A) Insulation, Wires, and Cables", + "children": [], + "url": "https://2023.antflix.net#805.50_(A)" + }, + { + "body": "Communications wires and cables in accordance with 805.50(A) shall be separated at least 100 mm (4 in.) from electric light or power conductors not in a raceway or cable or be permanently separated from conductors of the other systems by a continuous and firmly fixed nonconductor in addition to the insulation on the wires, such as porcelain tubes or flexible tubing. Communications wires and cables in accordance with 805.50(A) exposed to accidental contact with electric light and power conductors operating at over 300 volts to ground and attached to buildings shall be separated from woodwork by being supported on glass, porcelain, or other insulating material. Exception: Separation from woodwork shall not be required where fuses are omitted as provided for in 805.90(A)(1), or where conductors are used to extend circuits to a building from a cable having a grounded metal sheath. [805.50_(B)](https://2023.antflix.net#805.50_(B))", + "displayTitle": "(B) On Buildings", + "children": [], + "url": "https://2023.antflix.net#805.50_(B)" + }, + { + "displayTitle": "(C) Entering Buildings", + "children": [ + { + "body": "If a primary protector is installed inside the building, the communications wires and cables shall enter the building either through a noncombustible, nonabsorbent insulating bushing or through a metal raceway. Exception: The insulating bushing shall not be required if the entering communications wires and cables meet one or more of the following conditions: (1) Is a metal-sheathed cable (2) Pass through masonry (3) Meet the requirements of 805.50(A) and fuses are omitted in accordance with 805.90(A)(1) (4) Meet the requirements of 805.50(A) and are used to extend circuits to a building from a cable having a grounded metal sheath [805.50_(C)_(1)](https://2023.antflix.net#805.50_(C)_(1))", + "displayTitle": "(1) Installed Inside Buildings", + "children": [], + "url": "https://2023.antflix.net#805.50_(C)_(1)" + }, + { + "body": "Raceways or bushings shall slope upward from the outside, or, where this cannot be done, drip loops shall be formed in the communications wires and cables immediately before they enter the building. [805.50_(C)_(2)](https://2023.antflix.net#805.50_(C)_(2))", + "displayTitle": "(2) Orientation of Raceways or Bushings", + "children": [], + "url": "https://2023.antflix.net#805.50_(C)_(2)" + }, + { + "body": "Raceways shall be equipped with an approved service head. More than one communications wire and cable shall be permitted to enter through a single raceway or bushing. Conduits or other metal raceways located ahead of the primary protector shall be grounded. [805.50_(C)_(3)](https://2023.antflix.net#805.50_(C)_(3))", + "displayTitle": "(3) Service Head", + "children": [], + "url": "https://2023.antflix.net#805.50_(C)_(3)" + } + ], + "url": "https://2023.antflix.net#805.50_(C)" + } + ], + "url": "https://2023.antflix.net#805.50" + }, + { + "displayTitle": "Part III Protection", + "children": [], + "url": "https://2023.antflix.net#divider_103_III" + }, + { + "displayTitle": "805.90 Protective Devices", + "children": [ + { + "body": "A listed primary protector shall be provided on each circuit run partly or entirely in aerial wire or aerial cable not confined within a block. Also, a listed primary protector shall be provided on each circuit, aerial or underground, located within the block containing the building served so as to be exposed to accidental contact with electric light or power conductors operating at over 300 volts to ground. In addition, where there exists a lightning exposure, each interbuilding circuit on a premises shall be protected by a listed primary protector at each end of the interbuilding circuit. Installation of primary protectors shall also comply with 110.3(B). Informational Note No. 1: On a circuit not exposed to accidental contact with power conductors, providing a listed primary protector in accordance with this article helps protect against other hazards, such as lightning and above-normal voltages induced by fault currents on power circuits in proximity to the communications circuit. Informational Note No. 2: Interbuilding circuits are considered to have a lightning exposure unless one or more of the following conditions exist:Circuits in large metropolitan areas where buildings are close together and sufficiently high to intercept lightning.Interbuilding cable runs of 42 m (140 ft) or less, directly buried or in underground conduit, where a continuous metallic cable shield or a continuous metal conduit containing the cable is connected to each building grounding electrode system.Areas having an average of five or fewer thunderstorm days per year and earth resistivity of less than 100 ohmmeters. Such areas are found along the Pacific coast.Informational Note No. 3: See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, for information on lightning protection systems. [805.90_(A)](https://2023.antflix.net#805.90_(A))", + "displayTitle": "(A) Application", + "children": [ + { + "body": "Fuseless-type primary protectors shall be permitted under any of the following conditions: Where conductors enter a building through a cable with grounded metallic sheath member(s) and where the conductors in the cable safely fuse on all currents greater than the current-carrying capacity of the primary protector and of the primary protector bonding conductor or grounding electrode conductorWhere insulated conductors in accordance with 805.50(A) are used to extend circuits to a building from a cable with an effectively grounded metallic sheath member(s) and where the conductors in the cable or cable stub, or the connections between the insulated conductors and the plant exposed to accidental contact with electric light or power conductors operating at greater than 300 volts to ground, safely fuse on all currents greater than the current-carrying capacity of the primary protector, or the associated insulated conductors and of the primary protector bonding conductor or grounding electrode conductorWhere insulated conductors in accordance with 805.50(A) or (B) are used to extend circuits to a building from other than a cable with metallic sheath member(s), where (a) the primary protector is listed as being suitable for this purpose for application with circuits extending from other than a cable with metallic sheath members and (b) the connections of the insulated conductors to the plant exposed to accidental contact with electric light or power conductors operating at greater than 300 volts to ground or the conductors of the plant exposed to accidental contact with electric light or power conductors operating at greater than 300 volts to ground safely fuse on all currents greater than the current-carrying capacity of the primary protector, or associated insulated conductors and of the primary protector bonding conductor or grounding electrode conductorWhere insulated conductors in accordance with 805.50(A) are used to extend circuits aerially to a building from a buried or underground circuit that is unexposed to accidental contact with electric light or power conductors operating at greater than 300 volts to groundWhere insulated conductors in accordance with 805.50(A) are used to extend circuits to a building from cable with an effectively grounded metallic sheath member(s), and where (a) the combination of the primary protector and insulated conductors is listed as being suitable for this purpose for application with circuits extending from a cable with an effectively grounded metallic sheath member(s) and (b) the insulated conductors safely fuse on all currents greater than the current-carrying capacity of the primary protector and of the primary protector bonding conductor or grounding electrode conductorInformational Note: See ANSI/IEEE C2-2017, National Electrical Safety Code, Section 9, for examples of methods of protective grounding that can achieve effective grounding of communications cable sheaths for cables from which communications circuits are extended. [805.90_(A)_(1)](https://2023.antflix.net#805.90_(A)_(1))", + "displayTitle": "(1) Fuseless Primary Protectors", + "children": [], + "url": "https://2023.antflix.net#805.90_(A)_(1)" + }, + { + "body": "Where the requirements listed under 805.90(A)(1)(a) through (A)(1)(e) are not met, fused-type primary protectors shall be used. Fused-type primary protectors shall consist of an arrester connected between each line conductor and ground, a fuse in series with each line conductor, and an appropriate mounting arrangement. Primary protector terminals shall be marked to indicate line, instrument, and ground, as applicable. [805.90_(A)_(2)](https://2023.antflix.net#805.90_(A)_(2))", + "displayTitle": "(2) Fused Primary Protectors", + "children": [], + "url": "https://2023.antflix.net#805.90_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#805.90_(A)" + }, + { + "body": "The primary protector shall be located in, on, or immediately adjacent to the structure or building served and as close as practicable to the point of entrance. For purposes of this section, primary protectors located at mobile home service equipment within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, or at a mobile home disconnecting means connected to an electrode by a grounding electrode conductor in accordance with 250.32 and located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, shall be considered to meet the requirements of this section. Informational Note: Selecting a primary protector location to achieve the shortest practicable primary protector bonding conductor or grounding electrode conductor helps limit potential differences between communications circuits and other metallic systems. [805.90_(B)](https://2023.antflix.net#805.90_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#805.90_(B)" + }, + { + "body": "The primary protector shall not be located in any hazardous (classified) locations, as defined in 500.5 and 505.5, or in the vicinity of easily ignitible material. Exception: As permitted in 501.150, 502.150, and 503.150. [805.90_(C)](https://2023.antflix.net#805.90_(C))", + "displayTitle": "(C) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#805.90_(C)" + }, + { + "body": "Where a secondary protector is installed in series with the indoor communications wire and cable between the primary protector and the equipment, it shall be listed for the purpose in accordance with 805.170(B). Informational Note: Secondary protectors on circuits exposed to accidental contact with electric light or power conductors operating at greater than 300 volts to ground are not intended for use without primary protectors. [805.90_(D)](https://2023.antflix.net#805.90_(D))", + "displayTitle": "(D) Secondary Protectors", + "children": [], + "url": "https://2023.antflix.net#805.90_(D)" + } + ], + "url": "https://2023.antflix.net#805.90" + }, + { + "body": "Communications cables entering the building or terminating on the outside of the building shall comply with 805.93(A) or (B). [805.93](https://2023.antflix.net#805.93)", + "displayTitle": "805.93 Grounding, Bonding, or Interruption of Non-Current-Carrying Metallic Sheath Members of Communications Cables", + "children": [ + { + "body": "In installations where the communications cable enters a building, the metallic sheath members of the cable shall be grounded or bonded as specified in 800.100 or interrupted by an insulating joint or equivalent device. The grounding, bonding, or interruption shall be as close as practicable to the point of entrance. [805.93_(A)](https://2023.antflix.net#805.93_(A))", + "displayTitle": "(A) Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#805.93_(A)" + }, + { + "body": "In installations where the communications cable is terminated on the outside of the building, the metallic sheath members of the cable shall be grounded or bonded as specified in 800.100 or interrupted by an insulating joint or equivalent device. The grounding, bonding, or interruption shall be as close as practicable to the point of termination of the cable. [805.93_(B)](https://2023.antflix.net#805.93_(B))", + "displayTitle": "(B) Terminating on the Outside of Buildings", + "children": [], + "url": "https://2023.antflix.net#805.93_(B)" + } + ], + "url": "https://2023.antflix.net#805.93" + }, + { + "displayTitle": "Part IV Installation Methods Within Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_45_IV" + }, + { + "body": "The substitutions for communications cables listed in Table 805.154 and illustrated in Figure 805.154 shall be permitted. Table 805.154 Cable Substitutions Cable Type Permitted Substitutions CMR CMP CMG, CM CMP, CMR CMX CMP, CMR, CMG, CM FIGURE 805.154 Cable Substitution Hierarchy. [805.154](https://2023.antflix.net#805.154)", + "displayTitle": "805.154 Substitutions for Listed Communications Cables", + "children": [], + "url": "https://2023.antflix.net#805.154" + }, + { + "body": "For new construction, a minimum of one communications outlet shall be installed within the dwelling in a readily accessible area and cabled to the service provider demarcation point. [805.156](https://2023.antflix.net#805.156)", + "displayTitle": "805.156 Dwelling Unit Communications Outlet", + "children": [], + "url": "https://2023.antflix.net#805.156" + }, + { + "displayTitle": "Part V Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_32_V" + }, + { + "body": "Protectors shall be listed in accordance with 805.170(A) or 805.170(B). [805.170](https://2023.antflix.net#805.170)", + "displayTitle": "805.170 Protectors", + "children": [ + { + "body": "The primary protector shall be listed and consist of an arrester connected between each line conductor and ground in an appropriate mounting. Primary protector terminals shall be marked to indicate line and ground as applicable. Informational Note: See ANSI/UL 497-2017, Standard for Protectors for Paired Conductor Communications Circuits, to determine applicable requirements for a listed primary protector. [805.170_(A)](https://2023.antflix.net#805.170_(A))", + "displayTitle": "(A) Primary Protectors", + "children": [], + "url": "https://2023.antflix.net#805.170_(A)" + }, + { + "body": "The secondary protector shall be listed as suitable to provide means to safely limit currents to less than the current-carrying capacity of listed indoor communications wire and cable, listed telephone set line cords, and listed communications terminal equipment having ports for external wire line communications circuits. Any overvoltage protection, arresters, or grounding connection shall be connected on the equipment terminals side of the secondary protector current-limiting means. Informational Note: See ANSI/UL 497A-2019, Standard for Secondary Protectors for Communications Circuits, to determine applicable requirements for a listed secondary protector. [805.170_(B)](https://2023.antflix.net#805.170_(B))", + "displayTitle": "(B) Secondary Protectors", + "children": [], + "url": "https://2023.antflix.net#805.170_(B)" + } + ], + "url": "https://2023.antflix.net#805.170" + }, + { + "body": "Communications wires and cables without a metallic shield, running from the last outdoor support to the primary protector, shall be listed as being suitable for the purpose and shall have current-carrying capacity as specified in 805.90(A)(1) (b) or (A)(1) (c). [805.173](https://2023.antflix.net#805.173)", + "displayTitle": "805.173 Drop Wire and Cable", + "children": [], + "url": "https://2023.antflix.net#805.173" + } + ], + "url": "https://2023.antflix.net#805" + }, + { + "displayTitle": "Article 810 Antenna Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_120_I" + }, + { + "body": "This article covers antenna systems for radio and television receiving equipment, amateur and citizen band radio transmitting and receiving equipment, and certain features of transmitter safety. This article covers antennas such as wire-strung type, multi-element, vertical rod, flat, or parabolic and also covers the wiring and cabling that connect them to equipment. This article does not cover equipment and antennas used for coupling carrier current to power line conductors. [810.1](https://2023.antflix.net#810.1)", + "displayTitle": "810.1 Scope", + "children": [], + "url": "https://2023.antflix.net#810.1" + }, + { + "body": "Wiring from the source of power to and between devices connected to the interior wiring system shall comply with the following: Chapters 1 through 4 other than as modified by Parts I and II of Article 640.Coaxial cables that connect antennas to equipment shall comply with the appropriate article of Chapter 8.Wiring and equipment installed in hazardous (classified) locations shall comply with the appropriate requirements in Chapter 5. [810.3](https://2023.antflix.net#810.3)", + "displayTitle": "810.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#810.3" + }, + { + "body": "The installation of the antenna shall comply with this article. The installation of the distribution system shall comply with the appropriate article of Chapter 8. [810.4](https://2023.antflix.net#810.4)", + "displayTitle": "810.4 Community Television Antenna", + "children": [], + "url": "https://2023.antflix.net#810.4" + }, + { + "body": "Radio interference eliminators, interference capacitors, or noise suppressors connected to power-supply leads shall be of a listed type. They shall not be exposed to physical damage. [810.5](https://2023.antflix.net#810.5)", + "displayTitle": "810.5 Radio Noise Suppression", + "children": [], + "url": "https://2023.antflix.net#810.5" + }, + { + "body": "If an antenna lead-in surge protector is installed, it shall be listed as being suitable for limiting surges on the cable that connects the antenna to the receiver/transmitter electronics and shall be connected between the conductors and the grounded shield or other ground connection. The antenna lead-in protector shall be grounded using a bonding conductor or grounding electrode conductor installed in accordance with 810.21 (F). Informational Note: See UL 497E, Outline of Investigation for Protectors for Antenna Lead-In Conductors, for information concerning protectors for antenna lead-in conductors. [810.6](https://2023.antflix.net#810.6)", + "displayTitle": "810.6 Antenna Lead-in Protectors", + "children": [], + "url": "https://2023.antflix.net#810.6" + }, + { + "body": "If bonding or grounding is required, devices used to connect a shield, a sheath, noncurrent-carrying metal members of a cable, or metal parts of equipment or antennas to a bonding conductor or grounding electrode conductor shall be listed or be part of listed equipment. [810.7](https://2023.antflix.net#810.7)", + "displayTitle": "810.7 Grounding Devices", + "children": [], + "url": "https://2023.antflix.net#810.7" + }, + { + "displayTitle": "Part II Receiving Equipment \u2014 Antenna Systems", + "children": [], + "url": "https://2023.antflix.net#divider_120_II" + }, + { + "body": "Antennas and lead-in conductors shall be of hard-drawn copper, bronze, aluminum alloy, copper-clad steel, or other high-strength, corrosion-resistant material. Exception: Soft-drawn or medium-drawn copper shall be permitted for lead-in conductors if the maximum span between points of support is less than 11 m (35 ft). [810.11](https://2023.antflix.net#810.11)", + "displayTitle": "810.11 Material", + "children": [], + "url": "https://2023.antflix.net#810.11" + }, + { + "body": "Outdoor antennas and lead-in conductors shall be securely supported. The antennas or lead-in conductors shall not be attached to the electric service mast. They shall not be attached to poles or similar structures carrying open electric light or power wires or trolley wires of over 250 volts between conductors. Insulators supporting the antenna conductors shall have sufficient mechanical strength to safely support the conductors. Lead-in conductors shall be securely attached to the antennas. [810.12](https://2023.antflix.net#810.12)", + "displayTitle": "810.12 Supports", + "children": [], + "url": "https://2023.antflix.net#810.12" + }, + { + "body": "Outdoor antennas and lead-in conductors from an antenna to a building shall not cross over open conductors of electric light or power circuits and shall be kept well away from all such circuits so as to avoid the possibility of accidental contact. Where proximity to open electric light or power service conductors of less than 250 volts between conductors cannot be avoided, the installation shall be such as to provide a clearance of at least 600 mm (2 ft). Where practicable, antenna conductors shall be installed so as not to cross under open electric light or power conductors. [810.13](https://2023.antflix.net#810.13)", + "displayTitle": "810.13 Avoidance of Contacts With Conductors of Other Systems", + "children": [], + "url": "https://2023.antflix.net#810.13" + }, + { + "body": "Splices and joints in antenna spans shall be made mechanically secure with approved splicing devices or by such other means and be suitable for the conditions of use and location in compliance with 110.14(A) and (B). [810.14](https://2023.antflix.net#810.14)", + "displayTitle": "810.14 Splices", + "children": [], + "url": "https://2023.antflix.net#810.14" + }, + { + "body": "Masts and metal structures supporting antennas shall be grounded or bonded in accordance with 810.21, unless the antenna and its related supporting mast or structure are within a zone of protection defined by a 46 m (150 ft) radius rolling sphere. Informational Note: See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, 4.7.3.1, for the application of the term rolling sphere. [810.15](https://2023.antflix.net#810.15)", + "displayTitle": "810.15 Grounding or Bonding", + "children": [], + "url": "https://2023.antflix.net#810.15" + }, + { + "displayTitle": "810.16 Size of Wire-Strung Antenna \u2014 Receiving Station", + "children": [ + { + "body": "Outdoor antenna conductors for receiving stations shall be of a size not less than given in Table 810.16(A).Table 810.16 (A) Size of Receiving Station Outdoor Antenna Conductors Material Minimum Size of Conductors (AWG)Where Maximum Open Span Length Is Less Than11 m (35 ft) 11 m to45 m (35 ftto 150 ft) Over 45 m(150 ft) Aluminum alloy, hard-drawn copper 19 14 12 Copper-clad steel, bronze, or other high-strength material 20 17 14 [810.16_(A)](https://2023.antflix.net#810.16_(A))", + "displayTitle": "(A) Size of Antenna Conductors", + "children": [], + "url": "https://2023.antflix.net#810.16_(A)" + }, + { + "body": "Outdoor antennas, such as vertical rods and flat, parabolic, or dipole structures, shall be of corrosion-resistant materials and of strength suitable to withstand ice and wind loading conditions and shall be located well away from overhead conductors of electric light and power circuits of over 150 volts to ground, so as to avoid the possibility of the antenna or structure falling into or making accidental contact with such circuits. [810.16_(B)](https://2023.antflix.net#810.16_(B))", + "displayTitle": "(B) Self-Supporting Antennas", + "children": [], + "url": "https://2023.antflix.net#810.16_(B)" + } + ], + "url": "https://2023.antflix.net#810.16" + }, + { + "body": "Lead-in conductors from outside antennas for receiving stations shall, for various maximum open span lengths, be of such size as to have a tensile strength at least as great as that of the conductors for antennas as specified in 810.16. If the lead-in consists of two or more conductors that are twisted together, are enclosed in the same covering, or are concentric, the conductor size shall, for various maximum open span lengths, be such that the tensile strength of the combination is at least as great as that of the conductors for antennas as specified in 810.16. [810.17](https://2023.antflix.net#810.17)", + "displayTitle": "810.17 Size of Lead-in \u2014 Receiving Station", + "children": [], + "url": "https://2023.antflix.net#810.17" + }, + { + "displayTitle": "810.18 Clearances \u2014 Receiving Stations", + "children": [ + { + "body": "Lead-in conductors attached to buildings shall be installed so that they cannot swing closer than 600 mm (2 ft) to the conductors of circuits of 250 volts or less between conductors, or 3.0 m (10 ft) to the conductors of circuits of over 250 volts between conductors, except that in the case of circuits not over 150 volts between conductors, if all conductors involved are supported so as to ensure permanent separation, the clearance shall be permitted to be reduced but shall not be less than 100 mm (4 in.). The clearance between lead-in conductors and any conductor forming a part of a lightning protection system shall not be less than 1.8 m (6 ft). Underground conductors shall be separated at least 300 mm (12 in.) from conductors of any light or power circuits or Class 1 circuits. Exception: The separation and clearance requirements shall not apply if the electric light or power conductors, Class 1 conductors, or lead-in conductors are installed in raceways or metal cable armor. Informational Note No. 1: See 250.60 for grounding associated with lightning protection components - strike termination devices. See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, for detailed information on grounding, bonding, and spacing from lightning protection systems, and the calculation of specific separation distances using the sideflash equation in Section 4.6. Informational Note No. 2: See NFPA 780-2020, Standard for the Installation of Lighting Protection Systems, for information on bonding or separation of metal raceways, enclosures, frames, and other non-current-carrying metal parts of electrical equipment installed on a building equipped with a lightning protection system. Separation from lightning protection conductors is typically 1.8 m (6 ft) through air or 900 mm (3 ft) through dense materials such as concrete, brick, or wood. [810.18_(A)](https://2023.antflix.net#810.18_(A))", + "displayTitle": "(A) Outside of Buildings", + "children": [], + "url": "https://2023.antflix.net#810.18_(A)" + }, + { + "body": "Indoor antennas and indoor lead-ins shall not be run nearer than 50 mm (2 in.) to conductors of other wiring systems in the premises unless one of the following conditions applies: The other conductors are in metal raceways or cable armor.The indoor antennas and indoor lead-ins are permanently separated from such other conductors by a continuous firmly fixed nonconductor. [810.18_(B)](https://2023.antflix.net#810.18_(B))", + "displayTitle": "(B) Antennas and Lead-Ins \u2014 Indoors", + "children": [], + "url": "https://2023.antflix.net#810.18_(B)" + }, + { + "body": "Indoor antennas and indoor lead-ins shall be permitted to occupy the same box or enclosure with conductors of other wiring systems if separated from such other conductors by an effective permanently installed barrier. [810.18_(C)](https://2023.antflix.net#810.18_(C))", + "displayTitle": "(C) In Boxes or Other Enclosures", + "children": [], + "url": "https://2023.antflix.net#810.18_(C)" + } + ], + "url": "https://2023.antflix.net#810.18" + }, + { + "body": "If an electrical supply circuit is used in lieu of an antenna, the device by which the radio receiving set is connected to the supply circuit shall be listed. [810.19](https://2023.antflix.net#810.19)", + "displayTitle": "810.19 Electrical Supply Circuits Used in Lieu of Antenna \u2014 Receiving Stations", + "children": [], + "url": "https://2023.antflix.net#810.19" + }, + { + "displayTitle": "810.20 Antenna Discharge Units \u2014 Receiving Stations", + "children": [ + { + "body": "Each lead-in conductor from an outdoor antenna shall be provided with a listed antenna discharge unit. Exception: A separate antenna discharge unit is not required if the lead-in conductors are enclosed in a continuous metal shield that complies with one of the following: (1) Is grounded or bonded with a conductor in accordance with 810.21 (2) Is protected by an antenna discharge unit [810.20_(A)](https://2023.antflix.net#810.20_(A))", + "displayTitle": "(A) General Requirement", + "children": [], + "url": "https://2023.antflix.net#810.20_(A)" + }, + { + "body": "Antenna discharge units shall be located outside the building or inside the building between the point of entrance of the lead-in and the radio set or transformers and as near as practicable to the entrance of the conductors to the building. The antenna discharge unit shall not be located near combustible material or in a hazardous (classified) location as defined in accordance with 500.5 and 505.5. [810.20_(B)](https://2023.antflix.net#810.20_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#810.20_(B)" + }, + { + "body": "The antenna discharge unit shall be grounded or bonded in accordance with 810.21. [810.20_(C)](https://2023.antflix.net#810.20_(C))", + "displayTitle": "(C) Grounding or Bonding", + "children": [], + "url": "https://2023.antflix.net#810.20_(C)" + } + ], + "url": "https://2023.antflix.net#810.20" + }, + { + "body": "Bonding conductors and grounding electrode conductors shall comply with 810.21(A) through 810.21 (K). [810.21](https://2023.antflix.net#810.21)", + "displayTitle": "810.21 Bonding Conductors and Grounding Electrode Conductors \u2014 Receiving Stations", + "children": [ + { + "body": "The bonding conductor or grounding electrode conductor shall be of copper, aluminum, copper-clad steel, copper-clad aluminum, bronze, or similar corrosion-resistant material. Aluminum or copper-clad aluminum bonding conductors or grounding electrode conductors shall not be used if subject to corrosive conditions or in direct contact with masonry or the earth or where subject to corrosive conditions. If used outside, aluminum or copper-clad aluminum conductors shall not be installed within 450 mm (18 in.) of the earth. [810.21_(A)](https://2023.antflix.net#810.21_(A))", + "displayTitle": "(A) Material", + "children": [], + "url": "https://2023.antflix.net#810.21_(A)" + }, + { + "body": "Insulation on bonding conductors or grounding electrode conductors shall not be required. [810.21_(B)](https://2023.antflix.net#810.21_(B))", + "displayTitle": "(B) Insulation", + "children": [], + "url": "https://2023.antflix.net#810.21_(B)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall be securely fastened in place and shall be permitted to be directly attached to the surface wired over without the use of insulating supports. Exception: Where proper support cannot be provided, the size of the bonding conductors or grounding electrode conductors shall be increased proportionately. [810.21_(C)](https://2023.antflix.net#810.21_(C))", + "displayTitle": "(C) Supports", + "children": [], + "url": "https://2023.antflix.net#810.21_(C)" + }, + { + "body": "Bonding conductors and grounding electrode conductors shall be protected where exposed to physical damage. Where the bonding conductor or grounding electrode conductor is installed in a metal raceway, both ends of the raceway shall be bonded to the contained conductor or to the same terminal or electrode to which the bonding conductor or grounding electrode conductor is connected. [810.21_(D)](https://2023.antflix.net#810.21_(D))", + "displayTitle": "(D) Physical Protection", + "children": [], + "url": "https://2023.antflix.net#810.21_(D)" + }, + { + "body": "The bonding conductor or grounding electrode conductor for an antenna mast or antenna discharge unit shall be run in as straight a line as practicable. [810.21_(E)](https://2023.antflix.net#810.21_(E))", + "displayTitle": "(E) Run in Straight Line", + "children": [], + "url": "https://2023.antflix.net#810.21_(E)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall be connected as required in 810.21(F)(1) through 810.21(F)(3). [810.21_(F)](https://2023.antflix.net#810.21_(F))", + "displayTitle": "(F) Electrode", + "children": [ + { + "body": "If the building or structure served has an inter-system bonding termination as required by 250.94, the bonding conductor shall be connected to the intersystem bonding termination. [810.21_(F)_(1)](https://2023.antflix.net#810.21_(F)_(1))", + "displayTitle": "(1) In Buildings or Structures With an Intersystem Bonding Termination", + "children": [], + "url": "https://2023.antflix.net#810.21_(F)_(1)" + }, + { + "body": "If the building or structure served has no intersystem bonding termination, the bonding conductor or grounding electrode conductor shall be connected to the nearest accessible location on one of the following: The building or structure grounding electrode system as covered in 250.50The power service accessible means external to the building, as covered in 250.94The nonflexible metal power service racewayThe service equipment enclosureThe grounding electrode conductor or the grounding electrode conductor metal enclosures of the power serviceThe grounded interior metal water piping systems, within 1.52 m (5 ft) from its point of entrance to the building, as covered in 250.52A bonding device intended to provide a termination point for the bonding conductor (intersystem bonding) shall not interfere with the opening of an equipment enclosure. A bonding device shall be mounted on nonremovable parts. A bonding device shall not be mounted on a door or cover even if the door or cover is nonremovable. [810.21_(F)_(2)](https://2023.antflix.net#810.21_(F)_(2))", + "displayTitle": "(2) In Buildings or Structures With Grounding Means", + "children": [], + "url": "https://2023.antflix.net#810.21_(F)_(2)" + }, + { + "body": "If the building or structure served has no intersystem bonding termination or grounding means as described in 810.21(F)(2), the grounding electrode conductor shall be connected to a grounding electrode as described in 250.52. [810.21_(F)_(3)](https://2023.antflix.net#810.21_(F)_(3))", + "displayTitle": "(3) In Buildings or Structures Without an Intersystem Bonding Termination or Grounding Means", + "children": [], + "url": "https://2023.antflix.net#810.21_(F)_(3)" + } + ], + "url": "https://2023.antflix.net#810.21_(F)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall be permitted to be run either inside or outside the building. [810.21_(G)](https://2023.antflix.net#810.21_(G))", + "displayTitle": "(G) Inside or Outside Building", + "children": [], + "url": "https://2023.antflix.net#810.21_(G)" + }, + { + "body": "The bonding conductor or grounding electrode conductor shall not be smaller than 10 AWG copper, 8 AWG aluminum, or 17 AWG copper-clad steel or bronze. [810.21_(H)](https://2023.antflix.net#810.21_(H))", + "displayTitle": "(H) Size", + "children": [], + "url": "https://2023.antflix.net#810.21_(H)" + }, + { + "body": "A single bonding conductor or grounding electrode conductor shall be permitted for both protective and operating purposes. [810.21_(I)](https://2023.antflix.net#810.21_(I))", + "displayTitle": "(I) Common Ground", + "children": [], + "url": "https://2023.antflix.net#810.21_(I)" + }, + { + "body": "A bonding jumper not smaller than 6 AWG copper or equivalent shall be connected between the radio and television equipment grounding electrode and the power grounding electrode system at the building or structure served if separate electrodes are used. [810.21_(J)](https://2023.antflix.net#810.21_(J))", + "displayTitle": "(J) Bonding of Electrodes", + "children": [], + "url": "https://2023.antflix.net#810.21_(J)" + }, + { + "body": "Connections to grounding electrodes shall comply with 250.70. [810.21_(K)](https://2023.antflix.net#810.21_(K))", + "displayTitle": "(K) Electrode Connection", + "children": [], + "url": "https://2023.antflix.net#810.21_(K)" + } + ], + "url": "https://2023.antflix.net#810.21" + }, + { + "displayTitle": "Part III Amateur and Citizen Band Transmitting and Receiving Stations \u2014 Antenna Systems", + "children": [], + "url": "https://2023.antflix.net#divider_104_III" + }, + { + "body": "In addition to complying with Part III, antenna systems for amateur and citizen band transmitting and receiving stations shall also comply with 810.11 through 810.15. [810.51](https://2023.antflix.net#810.51)", + "displayTitle": "810.51 Other Sections", + "children": [], + "url": "https://2023.antflix.net#810.51" + }, + { + "body": "Antenna conductors for transmitting and receiving stations shall be of a size not less than given in Table 810.52. Table 810.52 Size of Outdoor Antenna Conductors Material Minimum Size of Conductors (AWG)If Maximum Open Span Length Is Less Than 45 m(150 ft) Over 45 m(150 ft) Hard-drawn copper 14 10 Copper-clad steel, bronze, or other high-strength material 14 12 [810.52](https://2023.antflix.net#810.52)", + "displayTitle": "810.52 Size of Conductors", + "children": [], + "url": "https://2023.antflix.net#810.52" + }, + { + "body": "Lead-in conductors for transmitting stations shall, for various maximum span lengths, be of a size at least as great as that of conductors for antennas as specified in 810.52. [810.53](https://2023.antflix.net#810.53)", + "displayTitle": "810.53 Size of Lead-in Conductors", + "children": [], + "url": "https://2023.antflix.net#810.53" + }, + { + "body": "Antenna conductors for transmitting stations, attached to buildings, shall be firmly mounted at least 75 mm (3 in.) clear of the surface of the building on nonabsorbent insulating supports, such as treated pins or brackets equipped with insulators having not less than 75-mm (3-in.) creepage and airgap distances. Lead-in conductors attached to buildings shall also comply with these requirements. Exception: If the lead-in conductors are enclosed in a continuous metal shield that is grounded with a conductor in accordance with 810.58, they shall not be required to comply with these requirements. If grounded, the metal shield shall also be permitted to be used as a conductor. [810.54](https://2023.antflix.net#810.54)", + "displayTitle": "810.54 Clearance on Building", + "children": [], + "url": "https://2023.antflix.net#810.54" + }, + { + "body": "Except where protected with a continuous metallic shield that is grounded with a conductor in accordance with 810.58, lead-in conductors for transmitting stations shall enter buildings by one of the following methods: Through a rigid, noncombustible, nonabsorbent insulating tube or bushingThrough an opening provided for the purpose in which the entrance conductors are firmly secured so as to provide a clearance of at least 50 mm (2 in.)Through a drilled window pane [810.55](https://2023.antflix.net#810.55)", + "displayTitle": "810.55 Entrance to Building", + "children": [], + "url": "https://2023.antflix.net#810.55" + }, + { + "body": "Lead-in conductors to radio transmitters shall be located or installed so as to make accidental contact with them difficult. [810.56](https://2023.antflix.net#810.56)", + "displayTitle": "810.56 Protection Against Accidental Contact", + "children": [], + "url": "https://2023.antflix.net#810.56" + }, + { + "body": "Each lead-in conductor for outdoor antennas shall be provided with an antenna discharge unit or other suitable means that drain static charges from the antenna system. Exception No. 1: If the lead-in conductor is protected by a continuous metal shield that is grounded with a conductor in accordance with 810.58, an antenna discharge unit or other suitable means shall not be required for the lead-in conductor. Exception No. 2: If the antenna is grounded or bonded with a conductor in accordance with 810.58, an antenna discharge unit or other suitable means shall not be required. [810.57](https://2023.antflix.net#810.57)", + "displayTitle": "810.57 Antenna Discharge Units \u2014 Transmitting Stations", + "children": [], + "url": "https://2023.antflix.net#810.57" + }, + { + "body": "Bonding conductors and grounding electrode conductors shall comply with 810.58(A) through 810.58(C). [810.58](https://2023.antflix.net#810.58)", + "displayTitle": "810.58 Bonding Conductors and Grounding Electrode Conductors \u2014 Amateur and Citizen Band Transmitting and Receiving Stations", + "children": [ + { + "body": "All bonding conductors and grounding electrode conductors for amateur and citizen band transmitting and receiving stations shall comply with 810.21(A) through 810.21(C). [810.58_(A)](https://2023.antflix.net#810.58_(A))", + "displayTitle": "(A) Other Sections", + "children": [], + "url": "https://2023.antflix.net#810.58_(A)" + }, + { + "body": "The protective bonding conductor or grounding electrode conductor for transmitting stations shall be as large as the lead-in but not smaller than 10 AWG copper, bronze, or copper-clad steel. [810.58_(B)](https://2023.antflix.net#810.58_(B))", + "displayTitle": "(B) Size of Protective Bonding Conductor or Grounding Electrode Conductor", + "children": [], + "url": "https://2023.antflix.net#810.58_(B)" + }, + { + "body": "The operating bonding conductor or grounding electrode conductor for transmitting stations shall not be less than 14 AWG copper or its equivalent. [810.58_(C)](https://2023.antflix.net#810.58_(C))", + "displayTitle": "(C) Size of Operating Bonding Conductor or Grounding Electrode Conductor", + "children": [], + "url": "https://2023.antflix.net#810.58_(C)" + } + ], + "url": "https://2023.antflix.net#810.58" + }, + { + "displayTitle": "Part IV Interior Installation \u2014 Transmitting Stations", + "children": [], + "url": "https://2023.antflix.net#divider_46_IV" + }, + { + "body": "All conductors inside the building shall be separated at least 100 mm (4 in.) from the conductors of any electric light, power, or signaling circuit unless one of the following conditions applies: The conductors of a permanent audio system are installed in compliance with Parts I and II of Article 640.The conductors of portable and temporary audio systems are installed in compliance with Parts I and III of Article 640.The conductors are separated from such other conductors by a continuous and firmly fixed nonconductor. [810.70](https://2023.antflix.net#810.70)", + "displayTitle": "810.70 Separation From Other Conductors", + "children": [], + "url": "https://2023.antflix.net#810.70" + }, + { + "body": "Transmitters shall comply with 810.71(A) through (C). [810.71](https://2023.antflix.net#810.71)", + "displayTitle": "810.71 General", + "children": [ + { + "body": "The transmitter shall be enclosed in a metal frame or grille or separated from the operating space by a barrier or other equivalent means, all metallic parts of which are effectively connected to a bonding conductor or grounding electrode conductor. [810.71_(A)](https://2023.antflix.net#810.71_(A))", + "displayTitle": "(A) Enclosing", + "children": [], + "url": "https://2023.antflix.net#810.71_(A)" + }, + { + "body": "All external metal handles and controls accessible to the operating personnel shall be effectively connected to an equipment grounding conductor if the transmitter is powered by the premises wiring system or grounded with a conductor in accordance with 810.21. [810.71_(B)](https://2023.antflix.net#810.71_(B))", + "displayTitle": "(B) Grounding of Controls", + "children": [], + "url": "https://2023.antflix.net#810.71_(B)" + }, + { + "body": "All access doors shall be provided with interlocks that disconnect all voltages of over 350 volts between conductors when any access door is opened. [810.71_(C)](https://2023.antflix.net#810.71_(C))", + "displayTitle": "(C) Interlocks on Doors", + "children": [], + "url": "https://2023.antflix.net#810.71_(C)" + } + ], + "url": "https://2023.antflix.net#810.71" + } + ], + "url": "https://2023.antflix.net#810" + }, + { + "displayTitle": "Article 820 Community Antenna Television and Radio Distribution Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_121_I" + }, + { + "body": "This article covers coaxial cable distribution of radio frequency signals typically employed in community antenna television (CATV) systems. [820.1](https://2023.antflix.net#820.1)", + "displayTitle": "820.1 Scope", + "children": [], + "url": "https://2023.antflix.net#820.1" + }, + { + "body": "The wiring methods of Article 830 shall be permitted to substitute for the wiring methods of Article 820. Informational Note: Use of Article 830 wiring methods will facilitate the upgrading of Article 820 installations to network-powered broadband applications. [820.3](https://2023.antflix.net#820.3)", + "displayTitle": "820.3 Other Articles", + "children": [], + "url": "https://2023.antflix.net#820.3" + }, + { + "body": "Coaxial cable shall be permitted to deliver power to equipment that is directly associated with the radio frequency distribution system if the voltage is not over 60 volts and if the current is supplied by a transformer or other device that has power-limiting characteristics. Power shall be blocked from premises devices on the network that are not intended to be powered via the coaxial cable. [820.15](https://2023.antflix.net#820.15)", + "displayTitle": "820.15 Power Limitations", + "children": [], + "url": "https://2023.antflix.net#820.15" + }, + { + "displayTitle": "Part III Protection", + "children": [], + "url": "https://2023.antflix.net#divider_105_III" + }, + { + "body": "Coaxial cables entering buildings or attached to buildings shall comply with 820.93(A) or (B). Where the outer conductive shield of a coaxial cable is grounded, no other protective devices shall be required. For purposes of this section, grounding located at mobile home service equipment located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, or at a mobile home disconnecting means grounded in accordance with 250.32 and located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, shall be considered to meet the requirements of this section. Informational Note: Selecting a grounding block location to achieve the shortest practicable bonding conductor or grounding electrode conductor helps limit potential differences between CATV and other metallic systems. [820.93](https://2023.antflix.net#820.93)", + "displayTitle": "820.93 Grounding of the Outer Conductive Shield of Coaxial Cables", + "children": [ + { + "body": "In installations where the coaxial cable enters the building, the outer conductive shield shall be grounded in accordance with 820.100. The grounding shall be as close as practicable to the point of entrance. [820.93_(A)](https://2023.antflix.net#820.93_(A))", + "displayTitle": "(A) Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#820.93_(A)" + }, + { + "body": "In installations where the coaxial cable is terminated outside of the building, the outer conductive shield shall be grounded in accordance with 820.100. The grounding shall be as close as practicable to the point of attachment or termination. [820.93_(B)](https://2023.antflix.net#820.93_(B))", + "displayTitle": "(B) Terminating Outside of the Building", + "children": [], + "url": "https://2023.antflix.net#820.93_(B)" + }, + { + "body": "Where installed, a listed primary protector shall be applied on each community antenna and radio distribution (CATV) cable external to the premises. The listed primary protector shall be located as close as practicable to the entrance point of the cable on either side or integral to the ground block. [820.93_(C)](https://2023.antflix.net#820.93_(C))", + "displayTitle": "(C) Location", + "children": [], + "url": "https://2023.antflix.net#820.93_(C)" + }, + { + "body": "If a primary protector or equipment providing the primary protection function is used, it shall not be located in any hazardous (classified) location as defined in 500.5 and 505.5 or in the vicinity of easily ignitible material. Exception: Primary protection equipment shall be used only if permitted by 501.150, 502.150, and 503.150. [820.93_(D)](https://2023.antflix.net#820.93_(D))", + "displayTitle": "(D) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#820.93_(D)" + } + ], + "url": "https://2023.antflix.net#820.93" + }, + { + "displayTitle": "Part IV Grounding Methods", + "children": [], + "url": "https://2023.antflix.net#divider_47_IV" + }, + { + "body": "The shield of the coaxial cable shall be bonded or grounded as specified in 820.100(A) and (B). Exception: For communications systems using coaxial cable completely contained within the building (i.e., they do not exit the building) or the exterior zone of protection defined by a 46 m (150 ft) radius rolling sphere and isolated from outside cable plant, the shield shall be permitted to be grounded by a connection to an equipment grounding conductor as described in 250.118. Connecting to an equipment grounding conductor through a grounded receptacle using a dedicated bonding jumper and a permanently connected listed device shall be permitted. Use of a cord and plug for the connection to an equipment grounding conductor shall not be permitted. Informational Note: See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, 4.7.3.1, for the application of the term rolling sphere. [820.100](https://2023.antflix.net#820.100)", + "displayTitle": "820.100 Cable Bonding and Grounding", + "children": [ + { + "body": "The installation shall be in accordance with 800.100. [820.100_(A)](https://2023.antflix.net#820.100_(A))", + "displayTitle": "(A) General Requirements", + "children": [], + "url": "https://2023.antflix.net#820.100_(A)" + }, + { + "body": "Grounding of a coaxial drop cable shield by means of a protective device that does not interrupt the grounding system within the premises shall be permitted. [820.100_(B)](https://2023.antflix.net#820.100_(B))", + "displayTitle": "(B) Shield Protection Devices", + "children": [], + "url": "https://2023.antflix.net#820.100_(B)" + } + ], + "url": "https://2023.antflix.net#820.100" + }, + { + "body": "Unpowered equipment and enclosures or equipment powered by the coaxial cable shall be considered grounded where connected to the metallic cable shield. [820.103](https://2023.antflix.net#820.103)", + "displayTitle": "820.103 Equipment Grounding", + "children": [], + "url": "https://2023.antflix.net#820.103" + }, + { + "displayTitle": "Part V Installation Methods Within Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_33_V" + }, + { + "body": "The substitutions for coaxial cables in Table 820.154 and illustrated in Figure 820.154 shall be permitted. Informational Note: The substitute cables in Table 820.154 and Figure 820.154 are only coaxial-type cables. Table 820.154 Coaxial Cable Uses and Permitted Substitutions Cable Type Permitted Substitutions CATVP CMP, BLP CATVR CATVP, CMP, CMR, BMR, BLP, BLR CATV CATVP, CMP, CATVR. CMR, CMG, CM, BMR, BM, BLP, BLR, BL CATVX CATVP, CMP, CATVR, CMR, CATV, CMG, CM, BMR, BM, BLP, BLR, BL, BLX FIGURE 820.154 Coaxial Cable Substitution Hierarchy. [820.154](https://2023.antflix.net#820.154)", + "displayTitle": "820.154 Substitutions of Listed CATV Cables", + "children": [], + "url": "https://2023.antflix.net#820.154" + } + ], + "url": "https://2023.antflix.net#820" + }, + { + "displayTitle": "Article 830 Network-Powered Broadband Communications Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_122_I" + }, + { + "body": "This article covers network-powered broadband communications systems that provide any combination of voice, audio, video, data, and interactive services through a network interface unit. Informational Note: A typical basic system configuration includes a cable supplying power and broadband signal to a network interface unit that converts the broadband signal to the component signals. Typical cables are coaxial cable with both broadband signal and power on the center conductor, composite metallic cable with a coaxial member(s) or twisted pair members for the broadband signal and twisted pair members for power, and hybrid optical fiber cable with a pair of conductors for power. Larger systems may also include network components such as amplifiers that require network power. [830.1](https://2023.antflix.net#830.1)", + "displayTitle": "830.1 Scope", + "children": [], + "url": "https://2023.antflix.net#830.1" + }, + { + "body": "Network-powered broadband communications systems shall be classified as having low- or medium-power sources as specified in the following: Sources shall be classified as defined in Table 830.15.Direct-current power sources exceeding 150 volts to ground, but no more than 200 volts to ground, with the current to ground limited to 10 mA dc, that meet the current and power limitation for medium-power sources in Table 830.15 shall be classified as medium-power sources.Informational Note: See UL 60950-21-2007, Standard for Safety for Information Technology Equipment - Safety - Part 21: Remote Power Feeding, for listing information on equipment that complies with 830.15(2).Table 830.15 Limitations for Network-Powered Broadband Communications Systems Network Power Source Low Medium Circuit voltage, Vmax (volts)1 0\u2014100 0\u2014150 Power limitation, VAmax (volt-amperes)1 250 250 Current limitation, Imax (amperes)1 1000/Vmax 1000/Vmax Maximum power rating (volt-amperes) 100 100 Maximum voltage rating (volts) 100 150 Maximum overcurrent protection (amperes)2 100/Vmax NA 1 Vmax, Imax, and VAmax are determined with the current-limiting impedance in the circuit (not bypassed) as follows:Vmax - Maximum system voltage regardless of load with rated input appliedImax - Maximum system current under any noncapacitive load, including short circuit, and with overcurrent protection bypassed if used. Imax limits apply after 1 minute of operationVAmax - Maximum volt-ampere output after 1 minute of operation regardless of load and overcurrent protection bypassed if used2Overcurrent protection is not required if the current limiting device provides equivalent current limitation and the current-limiting device does not reset until power or the load is removed. [830.15](https://2023.antflix.net#830.15)", + "displayTitle": "830.15 Power Limitations", + "children": [], + "url": "https://2023.antflix.net#830.15" + }, + { + "displayTitle": "Part II Cables Outside and Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_121_II" + }, + { + "body": "Network-powered broadband communications cables located outside and entering buildings shall comply with 830.40(A) and (B). [830.40](https://2023.antflix.net#830.40)", + "displayTitle": "830.40 Entrance Cables", + "children": [ + { + "body": "Medium-power network-powered broadband communications circuits located outside and entering buildings shall be installed using Type BMU, Type BM, or Type BMR network-powered broadband communications medium-power cables. [830.40_(A)](https://2023.antflix.net#830.40_(A))", + "displayTitle": "(A) Medium-Power Circuits", + "children": [], + "url": "https://2023.antflix.net#830.40_(A)" + }, + { + "body": "Low-power network-powered broadband communications circuits located outside and entering buildings shall be installed using Type BLU or Type BLX low-power network-powered broadband communications cables. Cables shown in Table 830.154 shall be permitted to substitute. [830.40_(B)](https://2023.antflix.net#830.40_(B))", + "displayTitle": "(B) Low-Power Circuits", + "children": [], + "url": "https://2023.antflix.net#830.40_(B)" + } + ], + "url": "https://2023.antflix.net#830.40" + }, + { + "body": "Overhead (aerial) network powered broadband communications cables shall comply with 830.44(A) through (F). [830.44](https://2023.antflix.net#830.44)", + "displayTitle": "830.44 Overhead (Aerial) Cables", + "children": [ + { + "body": "Where network-powered broadband communications cables ate installed on poles and in-span or above roofs, they shall comply with 800.44. [830.44_(A)](https://2023.antflix.net#830.44_(A))", + "displayTitle": "(A) On Poles and In-Span or Above Roofs", + "children": [], + "url": "https://2023.antflix.net#830.44_(A)" + }, + { + "body": "Overhead (aerial) spans of network-powered broadband communications cables shall conform to not less than the following: 2.9 m (91/2 ft) - above finished grade, sidewalks, or from any platform or projection from which they might be reached and accessible to pedestrians only3.5 m (111/2 ft) - over residential property and driveways, and those commercial areas not subject to truck traffic4.7 m (151/2 ft) - over public streets, alleys, roads, parking areas subject to truck traffic, driveways on other than residential property, and other land traversed by vehicles such as cultivated, grazing, forest, and orchardInformational Note: See ANSI/IEEE C2-2017, National Electrical Safety Code, Table 232-1, which provides for clearances of wires, conductors, and cables above ground and roadways, rather than using the clearances referenced in 225.18. [830.44_(B)](https://2023.antflix.net#830.44_(B))", + "displayTitle": "(B) Clearance From Ground", + "children": [], + "url": "https://2023.antflix.net#830.44_(B)" + }, + { + "body": "Clearance of network-powered broadband communications cable in any direction from the water level, edge of pool, base of diving platform, or anchored raft shall comply with those clearances in 680.9. [830.44_(C)](https://2023.antflix.net#830.44_(C))", + "displayTitle": "(C) Over Pools", + "children": [], + "url": "https://2023.antflix.net#830.44_(C)" + }, + { + "body": "Final spans of network-powered broadband communications cables without an outer jacket shall be permitted to be attached to the building, but they shall be kept not less than 900 mm (3 ft) from windows that are designed to be opened, doors, porches, balconies, ladders, stairs, fire escapes, or similar locations. Exception: Conductors run above the top level of a window shall be permitted to be less than the 900-mm (3-ft) requirement above. Overhead (aerial) network-powered broadband communications cables shall not be installed beneath openings through which materials might be moved, such as openings in farm and commercial buildings, and shall not be installed where they obstruct entrance to these building openings. [830.44_(D)](https://2023.antflix.net#830.44_(D))", + "displayTitle": "(D) Final Spans", + "children": [], + "url": "https://2023.antflix.net#830.44_(D)" + }, + { + "body": "Network-powered broadband communications cables extending between buildings or structures, and also the supports or attachment fixtures, shall be identified as suitable for outdoor aerial applications and shall have sufficient strength to withstand the loads to which they may be subjected. Exception: Where a network-powered broadband communications cable does not have sufficient strength to be self-supporting, it shall be attached to a supporting messenger cable that, together with the attachment fixtures or supports, shall be acceptable for the purpose and shall have sufficient strength to withstand the loads to which they may be subjected. [830.44_(E)](https://2023.antflix.net#830.44_(E))", + "displayTitle": "(E) Between Buildings", + "children": [], + "url": "https://2023.antflix.net#830.44_(E)" + }, + { + "body": "Where attached to buildings, network-powered broadband communications cables shall be securely fastened in such a manner that they are separated from other conductors in accordance with 830.44(F)(1) through (F)(3). [830.44_(F)](https://2023.antflix.net#830.44_(F))", + "displayTitle": "(F) On Buildings", + "children": [ + { + "body": "The network-powered broadband communications cable shall have a separation of at least 100 mm (4 in.) from electric light, power, Class 1, or non-power-limited fire alarm circuit conductors not in raceway or cable, or be permanently separated from conductors of the other system by a continuous and firmly fixed nonconductor in addition to the insulation on the wires. [830.44_(F)_(1)](https://2023.antflix.net#830.44_(F)_(1))", + "displayTitle": "(1) Electric Light or Power", + "children": [], + "url": "https://2023.antflix.net#830.44_(F)_(1)" + }, + { + "body": "Network-powered broadband communications cables shall be installed so that there will be no unnecessary interference in the maintenance of the separate systems. In no case shall the conductors, cables, messenger strand, or equipment of one system cause abrasion to the conductors, cables, messenger strand, or equipment of any other system. [830.44_(F)_(2)](https://2023.antflix.net#830.44_(F)_(2))", + "displayTitle": "(2) Other Communications Systems", + "children": [], + "url": "https://2023.antflix.net#830.44_(F)_(2)" + }, + { + "body": "Network-powered broadband communications cables attached to buildings or structures and located within 2.5 m (8 ft) of finished grade shall be protected by enclosures, raceways, or other approved means. Exception: A low-power network-powered broadband communications circuit that is equipped with a listed fault protection device, appropriate to the network-powered broadband communications cable used, and located on the network side of the network-powered broadband communications cable shall not be required to be additionally protected by enclosures, raceways, or other approved means. [830.44_(F)_(3)](https://2023.antflix.net#830.44_(F)_(3))", + "displayTitle": "(3) Protection From Damage", + "children": [], + "url": "https://2023.antflix.net#830.44_(F)_(3)" + } + ], + "url": "https://2023.antflix.net#830.44_(F)" + } + ], + "url": "https://2023.antflix.net#830.44" + }, + { + "body": "Underground network-powered broadband communications cables entering buildings shall comply with 830.47(A) and (B). [830.47](https://2023.antflix.net#830.47)", + "displayTitle": "830.47 Underground Network-Powered Broadband Communications Cables Entering Buildings", + "children": [ + { + "body": "Direct-buried cable, conduit, or other raceways shall be installed to meet the minimum cover requirements of Table 830.47(A). In addition, direct-buried cables emerging from the ground shall be protected by enclosures, raceways, or other approved means extending from the minimum cover distance required by Table 830.47(A) below grade to a point at least 2.5 m (8 ft) above finished grade. In no case shall the protection be required to exceed 450 mm (18 in.) below finished grade. Types BMU and BLU direct-buried cables emerging from the ground shall be installed in rigid metal conduit (RMC), intermediate metal conduit (IMC), rigid nonmetallic conduit, or other approved means extending from the minimum cover distance required by Table 830.47(A) below grade to the point of entrance. Exception: Protection from physical damage shall not be required if a low-power network-powered broadband communications circuit is equipped with a listed fault protection device that is located on the network side of the network-powered broadband cable being protected and the device is appropriate to the network-powered broadband communications cable used.Table 830.47(A) Network-Powered Broadband Communications Systems Minimum Cover Requirements Location ofWiring Methodor Circuit Direct Burial Cables Rigid Metal Conduit (RMC)or Intermediate MetalConduit (IMC) Nonmetallic Raceways Listed forDirect Burial; Without ConcreteEncasement or Other ApprovedRaceways mm in. mm in. mm in. All locations not specified below 450 18 150 6 300 12 In trench below 50 mm (2 in.) thick concrete or equivalent 300 12 150 6 150 6 Under a building (in raceway only) 0 0 0 0 0 0 Under minimum of 100 mm (4 in.) thick concrete exterior slab with no vehicular traffic and the slab extending not less than 150 mm (6 in.) beyond the underground installation 300 12 100 4 100 4 One- and two-family dwelling driveways and outdoor parking areas and used only for dwelling-related purposes 300 12 300 12 300 12 Notes:Cover is the shortest distance measured between a point on the top surface of any direct-buried cable, conduit, or other raceway and the top surface of finished grade, concrete, or similar cover.Raceways approved for burial only where concrete encased shall require a concrete envelope not less than 50 mm (2 in.) thick.Lesser depths shall be permitted where cables rise for terminations or splices or where access is otherwise required.Where solid rock is encountered, all wiring shall be installed in metal or nonmetallic raceway permitted for direct burial.The raceways shall be covered by a minimum of 50 mm (2 in.) of concrete extending down to rock. [830.47_(A)](https://2023.antflix.net#830.47_(A))", + "displayTitle": "(A) Protection From Physical Damage", + "children": [], + "url": "https://2023.antflix.net#830.47_(A)" + }, + { + "body": "Cables located under the pool or within the area extending 1.5 m (5 ft) horizontally from the inside wall of the pool shall meet those clearances and requirements specified in 680.11. [830.47_(B)](https://2023.antflix.net#830.47_(B))", + "displayTitle": "(B) Pools", + "children": [], + "url": "https://2023.antflix.net#830.47_(B)" + } + ], + "url": "https://2023.antflix.net#830.47" + }, + { + "displayTitle": "Part III Protection", + "children": [], + "url": "https://2023.antflix.net#divider_106_III" + }, + { + "displayTitle": "830.90 Primary Electrical Protection", + "children": [ + { + "body": "Primary electrical protection shall be provided on all network-powered broadband communications conductors that are neither grounded nor interrupted and are run partly or entirely in aerial cable not confined within a block. Also, primary electrical protection shall be provided on all aerial or underground network-powered broadband communications conductors that are neither grounded nor interrupted and are located within the block containing the building served so as to be exposed to lightning or accidental contact with electric light or power conductors operating at over 300 volts to ground. Exception: Primary electrical protection shall not be required on the network-powered broadband communications conductors where electrical protection is provided on the derived circuit(s) (output side of the NIU) in accordance with 830.90(B)(3). Informational Note No. 1: On network-powered broadband communications conductors not exposed to lightning or accidental contact with power conductors, providing primary electrical protection in accordance with this article helps protect against other hazards, such as ground potential rise caused by power fault currents, and above-normal voltages induced by fault currents on power circuits in proximity to the network-powered broadband communications conductors. Informational Note No. 2: Network-powered broadband communications circuits are considered to have a lightning exposure unless one or more of the following conditions exist:Circuits in large metropolitan areas where buildings are close together and sufficiently high to intercept lightning.Areas having an average of five or fewer thunderstorm days each year and earth resistivity of less than 100 ohmmeters. Such areas are found along the Pacific coast.Informational Note No. 3: See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, for information on lightning protection systems. [830.90_(A)](https://2023.antflix.net#830.90_(A))", + "displayTitle": "(A) Application", + "children": [ + { + "body": "Fuseless-type primary protectors shall be permitted where power fault currents on all protected conductors in the cable are safely limited to a value no greater than the current-carrying capacity of the primary protector and of the primary protector bonding conductor or grounding electrode conductor. [830.90_(A)_(1)](https://2023.antflix.net#830.90_(A)_(1))", + "displayTitle": "(1) Fuseless Primary Protectors", + "children": [], + "url": "https://2023.antflix.net#830.90_(A)_(1)" + }, + { + "body": "Where the requirements listed in 830.90(A)(1) are not met, fused-type primary protectors shall be used. Fused-type primary protectors shall consist of an arrester connected between each conductor to be protected and ground, a fuse in series with each conductor to be protected, and an appropriate mounting arrangement. Fused primary protector terminals shall be marked to indicate line, instrument, and ground, as applicable. [830.90_(A)_(2)](https://2023.antflix.net#830.90_(A)_(2))", + "displayTitle": "(2) Fused Primary Protectors", + "children": [], + "url": "https://2023.antflix.net#830.90_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#830.90_(A)" + }, + { + "body": "The location of the primary protector, where required, shall comply with the following: A listed primary protector shall be applied on each network-powered broadband communications cable external to and on the network side of the network interface unit.The primary protector function shall be an integral part of and contained in the network interface unit. The network interface unit shall be listed as being suitable for application with network-powered broadband communications systems and shall have an external marking indicating that it contains primary electrical protection.The primary protector(s) shall be provided on the derived circuit(s) (output side of the NIU), and the combination of the NIU and the protector(s) shall be listed as being suitable for application with network-powered broadband communications systems.A primary protector, whether provided integrally or external to the network interface unit, shall be located as close as practicable to the point of entrance.For purposes of this section, a network interface unit and any externally provided primary protectors located at mobile home service equipment located in sight from and not more than 9.0 m (30 ft) from the exterior wall of the mobile home it serves, or at a mobile home disconnecting means grounded in accordance with 250.32 and located in sight from and not more than 9.0 m (30 ft) from the exterior wall of the mobile home it serves, shall be considered to meet the requirements of this section.Informational Note: Selecting a network interface unit and primary protector location to achieve the shortest practicable primary protector bonding conductor or grounding electrode conductor helps limit potential differences between communications circuits and other metallic systems. [830.90_(B)](https://2023.antflix.net#830.90_(B))", + "displayTitle": "(B) Location", + "children": [], + "url": "https://2023.antflix.net#830.90_(B)" + }, + { + "body": "The primary protector or equipment providing the primary protection function shall not be located in any hazardous (classified) location as defined in 500.5 and 505.5 or in the vicinity of easily ignitible material. Exception: As permitted in 501.150, 502.150, and 503.150. [830.90_(C)](https://2023.antflix.net#830.90_(C))", + "displayTitle": "(C) Hazardous (Classified) Locations", + "children": [], + "url": "https://2023.antflix.net#830.90_(C)" + } + ], + "url": "https://2023.antflix.net#830.90" + }, + { + "displayTitle": "Part IV Grounding Methods", + "children": [], + "url": "https://2023.antflix.net#divider_48_IV" + }, + { + "body": "Network-powered communications cables entering buildings or attaching to buildings shall comply with 830.93(A) or (B). For purposes of this section, grounding located at mobile home service equipment located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, or at a mobile home disconnecting means grounded in accordance with 250.32 and located within 9.0 m (30 ft) of the exterior wall of the mobile home it serves, shall be considered to meet the requirements of this section. Informational Note: Selecting a grounding location to achieve the shortest practicable bonding conductor or grounding electrode conductor helps limit potential differences between the network-powered broadband communications circuits and other metallic systems. [830.93](https://2023.antflix.net#830.93)", + "displayTitle": "830.93 Grounding or Interruption of Metallic Members of Network-Powered Broadband Communications Cables", + "children": [ + { + "body": "In installations where the network-powered communications cable enters the building, the shield shall be grounded in accordance with 800.100, and metallic members of the cable not used for communications or powering shall be grounded in accordance with 800.100 or interrupted by an insulating joint or equivalent device. The grounding or interruption shall be as close as practicable to the point of entrance. [830.93_(A)](https://2023.antflix.net#830.93_(A))", + "displayTitle": "(A) Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#830.93_(A)" + }, + { + "body": "In installations where the network-powered communications cable is terminated outside of the building, the shield shall be grounded in accordance with 800.100, and metallic members of the cable not used for communications or powering shall be grounded in accordance with 800.100 or interrupted by an insulating joint or equivalent device. The grounding or interruption shall be as close as practicable to the point of attachment of the NIU. [830.93_(B)](https://2023.antflix.net#830.93_(B))", + "displayTitle": "(B) Terminating Outside of the Building", + "children": [], + "url": "https://2023.antflix.net#830.93_(B)" + } + ], + "url": "https://2023.antflix.net#830.93" + }, + { + "displayTitle": "Part V Installation Methods Within Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_34_V" + }, + { + "body": "Cable and equipment installations within buildings shall comply with 830.133(A) through (C), as applicable. [830.133](https://2023.antflix.net#830.133)", + "displayTitle": "830.133 Installation of Network-Powered Broadband Communications Cables and Equipment", + "children": [ + { + "displayTitle": "(A) Separation of Conductors", + "children": [ + { + "body": "\nLow- and Medium-Power Network-Powered Broadband Communications Circuit Cables. Low- and medium-power network-powered broadband communications cables shall be permitted in the same raceway, cable tray, box, enclosure, or cable routing assembly.\n\nLow-Power Network-Powered Broadband Communications Circuit Cables with Other Circuits. Low-power network-powered broadband communications cables shall be permitted in the same raceway, cable tray, box, enclosure, or cable routing assembly with jacketed cables of any of the following circuits:\n\nClass 2 and Class 3 remote-control, signaling, and power-limited circuits in compliance with Parts I and II of Article 725\nPower-limited fire alarm systems in compliance with Parts I and III of Article 760\nCommunications circuits in compliance with Parts I and IV of Article 805\nNonconductive and conductive optical fiber cables in compliance with Parts I and V of Article 770\nCommunity antenna television and radio distribution systems in compliance with Parts I and V of Article 820\n\n\n\nMedium-Power Network-Powered Broadband Communications Circuit Cables with Optical Fiber Cables and Other Communications Cables. Medium-power network-powered broadband communications cables shall not be permitted in the same raceway, cable tray, box, enclosure, or cable routing assembly with conductors of any of the following circuits:\n\nCommunications circuits in compliance with Parts I and IV of Article 805\nConductive optical fiber cables in compliance with Parts I and V of Article 770\nCommunity antenna television and radio distribution systems in compliance with Parts I and V of Article 820\n\n\n\nMedium-Power Network-Powered Broadband Communications Circuit Cables with Other Circuits. Medium-power network-powered broadband communications cables shall not be permitted in the same raceway, cable tray, box, enclosure, or cable routing assembly with conductors of any of the following circuits:\n\nClass 2 and Class 3 remote-control, signaling, and power-limited circuits in compliance with Parts I and II of Article 725\nPower-limited fire alarm systems in compliance with Parts I and III of Article 760\n\n\nElectric Light, Power, Class 1, Nonpowered Broadband Communications Circuit Cables. Network-powered broadband communications cable shall not be placed in any raceway, cable tray, compartment, outlet box, junction box, or similar fittings with conductors of electric light, power, Class 1, or non-power-limited fire alarm circuit cables.\n\nException No. 1: Network-powered broadband communications cable shall be permitted to be placed in a raceway, cable tray, compartment, outlet box, junction box, or similar fittings with conductors of electric light, power, Class 1, or non-power-limited fire alarm circuit cables where all of the conductors of electric light, power, Class 1, non-power-limited fire alarm circuits are separated from all of the network-powered broadband communications cables by a permanent barrier or listed divider.\nException No. 2: Where power circuit conductors in outlet boxes, junction boxes, or similar fittings or compartments where such conductors are introduced solely for power supply to the network-powered broadband communications system distribution equipment, the power circuit conductors shall be routed within the enclosure to maintain a minimum 6 mm (1/4 in.) separation from network-powered broadband communications cables. [830.133_(A)_(1)](https://2023.antflix.net#830.133_(A)_(1))", + "displayTitle": "(1) In Raceways. Cable Trays, Boxes, Enclosures, and Cable Routing Assemblies", + "children": [], + "url": "https://2023.antflix.net#830.133_(A)_(1)" + }, + { + "body": "Network-powered broadband communications cable shall be separated at least 50 mm (2 in.) from conductors of any electric light, power, Class 1, and non-power-limited fire alarm circuits.\nException No. 1: Separation shall not be. required where: (1) all of the conductors of electric light, power, Class 1, and non-power-limited fire alarm circuits are in a raceway or in metal-sheathed, metal-clad, nonmetallic-sheathed, Type AC, or Type UF cables, or (2) all of the network-powered broadband communications cables are encased in a raceway.\nException No. 2: Separation shall not be required where the network-powered broadband communications cables are permanently separated from the conductors of electric light, power, Class 1, and non-power-limited fire alarm circuits by a continuous and firmly fixed nonconductor, such as porcelain tubes or flexible tubing, in addition to the insulation on the wire. [830.133_(A)_(2)](https://2023.antflix.net#830.133_(A)_(2))", + "displayTitle": "(2) Other Applications", + "children": [], + "url": "https://2023.antflix.net#830.133_(A)_(2)" + } + ], + "url": "https://2023.antflix.net#830.133_(A)" + }, + { + "body": "Raceways shall be used for their intended purpose. Network-powered broadband communications cables shall not be strapped, taped, or attached by any means to the exterior of any conduit or raceway as a means of support. [830.133_(B)](https://2023.antflix.net#830.133_(B))", + "displayTitle": "(B) Support of Network-Powered Broadband Communications Cables", + "children": [], + "url": "https://2023.antflix.net#830.133_(B)" + }, + { + "body": "Where a medium-powered network-powered broadband communications cable is spliced or extended, a listed junction box or listed patch panel shall be used. [830.133_(C)](https://2023.antflix.net#830.133_(C))", + "displayTitle": "(C) Splicing of Medium-Powered Network-Powered Communications Cables", + "children": [], + "url": "https://2023.antflix.net#830.133_(C)" + } + ], + "url": "https://2023.antflix.net#830.133" + }, + { + "body": "The substitutions for network-powered broadband system cables listed in Table 830.154 shall be permitted. Table 830.154 Cable Substitutions Cable Type Permitted Cable Substitutions BM BMR BLP CMP, CL3P BLR CMP, CL3P, CMR, CL3R, BLP, BMR BL CMP, CMR, CM, CMG, CL3P, CL3R, CL3, BMR, BM, BLP, BLR BLX CMP, CMR, CM, CMG, CMX, CL3P, CL3R, CL3, CL3X, BMR, BM, BLP, BRP, BL [830.154](https://2023.antflix.net#830.154)", + "displayTitle": "830.154 Substitutions of Network-Powered Broadband Communications System Cables", + "children": [], + "url": "https://2023.antflix.net#830.154" + }, + { + "body": "Bends in network broadband cable shall be made so as not to damage the cable. The radius of the curve of the inner edge of any bend shall not be less than 10 times the diameter of the cable. Informational Note: See ANSI/TIA-568.0-E Generic Telecommunications Cabling for Customer Premises, for information on bend radii of network broadband cable during different types of installation conditions. [830.160](https://2023.antflix.net#830.160)", + "displayTitle": "830.160 Bends", + "children": [], + "url": "https://2023.antflix.net#830.160" + }, + { + "displayTitle": "Part VI Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_23_VI" + }, + { + "body": "Network-powered broadband communications equipment and cables shall be listed and marked in accordance with 830.179(A) through (C). Exception No. 1: This listing requirement shall not apply to community antenna television and radio distribution system coaxial cables that were installed prior to January 1, 2000, in accordance with Article 820 and are used for low-power network-powered broadband communications circuits. Exception No. 2: Substitute cables for network-powered broadband communications cables shall be permitted as shown in Table 830.154. [830.179](https://2023.antflix.net#830.179)", + "displayTitle": "830.179 Network-Powered Broadband Communications Equipment and Cables", + "children": [ + { + "body": "The general requirements in 800.179 shall apply. [830.179_(A)](https://2023.antflix.net#830.179_(A))", + "displayTitle": "(A) General Requirements", + "children": [], + "url": "https://2023.antflix.net#830.179_(A)" + }, + { + "body": "Network-powered broadband communications medium-power cables shall be factory-assembled cables consisting of a jacketed coaxial cable, a jacketed combination of coaxial cable and multiple individual conductors, or a jacketed combination of an optical fiber cable and multiple individual conductors. The insulation for the individual conductors shall be rated for 300 volts minimum. Cables intended for outdoor use shall be listed as suitable for the application. Cables shall be marked in accordance with 310.8. Type BMU cables shall be jacketed and listed as being suitable for outdoor underground use. [830.179_(B)](https://2023.antflix.net#830.179_(B))", + "displayTitle": "(B) Network-Powered Broadband Communications Medium-Power Cables", + "children": [], + "url": "https://2023.antflix.net#830.179_(B)" + }, + { + "body": "Network-powered broadband communications low-power cables shall be factory-assembled cables consisting of a jacketed coaxial cable, a jacketed combination of coaxial cable and multiple individual conductors, or a jacketed combination of an optical fiber cable and multiple individual conductors. The insulation for the individual conductors shall be rated for 300 volts minimum. Cables intended for outdoor use shall be listed as suitable for the application. Cables shall be marked in accordance with 310.8. Type BLU cables shall be jacketed and listed as being suitable for outdoor underground use. Informational Note: See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, for the theory of the term rolling sphere. [830.179_(C)](https://2023.antflix.net#830.179_(C))", + "displayTitle": "(C) Network-Powered Broadband Communication Low-Power Cables", + "children": [], + "url": "https://2023.antflix.net#830.179_(C)" + } + ], + "url": "https://2023.antflix.net#830.179" + } + ], + "url": "https://2023.antflix.net#830" + }, + { + "displayTitle": "Article 840 Premises-Powered Broadband Communications Systems", + "children": [ + { + "displayTitle": "Part I General", + "children": [], + "url": "https://2023.antflix.net#divider_123_I" + }, + { + "body": "This article covers premises-powered broadband communications systems. Informational Note: A typical basic system configuration consists of an optical fiber, twisted pair, or coaxial cable to the premises supplying a broadband signal to a network terminal that converts the broadband signal into component signals, such as traditional telephone, video, high-speed Internet, and interactive services. Powering for the network terminal and network devices is typically accomplished through a premises power supply that might be built into the network terminal or provided as a separate unit. In order to provide communications in the event of a power interruption, a battery backup unit or an uninterruptible power supply (UPS) is typically part of the powering system. [840.1](https://2023.antflix.net#840.1)", + "displayTitle": "840.1 Scope", + "children": [], + "url": "https://2023.antflix.net#840.1" + }, + { + "displayTitle": "Part II Cables Outside and Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#divider_122_II" + }, + { + "body": "Direct-buried cables shall be installed to have a minimum cover of 150 mm (6 in.). [840.47](https://2023.antflix.net#840.47)", + "displayTitle": "840.47 Underground Wires and Cables Entering Buildings", + "children": [], + "url": "https://2023.antflix.net#840.47" + }, + { + "displayTitle": "Part III Protection", + "children": [], + "url": "https://2023.antflix.net#divider_107_III" + }, + { + "body": "The requirements of 805.90 shall apply. [840.90](https://2023.antflix.net#840.90)", + "displayTitle": "840.90 Protective Devices", + "children": [], + "url": "https://2023.antflix.net#840.90" + }, + { + "body": "Non-current-carrying metallic members of optical fiber cables, communications cables, or coaxial cables entering buildings or attaching to buildings shall comply with 840.93(A), (B), or (C), respectively. [840.93](https://2023.antflix.net#840.93)", + "displayTitle": "840.93 Grounding or Interruption", + "children": [ + { + "body": "Non-current-carrying metallic members of optical fiber cables entering a building or terminating on the outside of a building shall comply with 770.93(A) or (B). [840.93_(A)](https://2023.antflix.net#840.93_(A))", + "displayTitle": "(A) Non-Current-Carrying Metallic Members of Optical Fiber Cables", + "children": [], + "url": "https://2023.antflix.net#840.93_(A)" + }, + { + "body": "The grounding or interruption of the metallic sheath of communications cable shall comply with 805.93. [840.93_(B)](https://2023.antflix.net#840.93_(B))", + "displayTitle": "(B) Communications Cables", + "children": [], + "url": "https://2023.antflix.net#840.93_(B)" + }, + { + "body": "Where the network terminal is installed inside or outside of the building, with coaxial cables terminating at the network terminal, and is either entering, exiting, or attached to the outside of the building, 820.93 shall apply. [840.93_(C)](https://2023.antflix.net#840.93_(C))", + "displayTitle": "(C) Coaxial Cables", + "children": [], + "url": "https://2023.antflix.net#840.93_(C)" + } + ], + "url": "https://2023.antflix.net#840.93" + }, + { + "body": "Where circuits leave the building to power equipment remote to the building or outside the exterior zone of protection defined by a 46 m (150 ft) radius rolling sphere, 805.90 and 805.93 shall apply. [840.94](https://2023.antflix.net#840.94)", + "displayTitle": "840.94 Premises Circuits Leaving the Building", + "children": [], + "url": "https://2023.antflix.net#840.94" + }, + { + "displayTitle": "Part IV Grounding Methods", + "children": [], + "url": "https://2023.antflix.net#divider_49_IV" + }, + { + "body": "If the network terminal is served by a nonconductive optical fiber cable, or where any non-current-carrying metal member of a conductive optical fiber cable is interrupted by an insulating joint or equivalent device, and circuits that terminate at the network terminal are completely contained within the building (i.e., they do not exit the building), 840.101(A), (B), or (C) shall apply, as applicable. [840.101](https://2023.antflix.net#840.101)", + "displayTitle": "840.101 Premises Circuits Not Leaving the Building", + "children": [ + { + "body": "The shield of coaxial cable shall be grounded by one of the following: Any of the methods described in 820.100 or 800.106A fixed connection to an equipment grounding conductor as described in 250.118Connection to the network terminal grounding terminal provided that the terminal is connected to ground by one of the methods described in 820.100 or 800.106, or to an equipment grounding conductor through a listed grounding device that wall retain the ground connection if the network terminal is unplugged [840.101_(A)](https://2023.antflix.net#840.101_(A))", + "displayTitle": "(A) Coaxial Cable Shield Grounding", + "children": [], + "url": "https://2023.antflix.net#840.101_(A)" + }, + { + "body": "Communications circuits shall not be required to be grounded. [840.101_(B)](https://2023.antflix.net#840.101_(B))", + "displayTitle": "(B) Communications Circuit Grounding", + "children": [], + "url": "https://2023.antflix.net#840.101_(B)" + }, + { + "body": "The network terminal shall not be required to be grounded unless required by its listing. If the coaxial cable shield is separately grounded as described in 840.101 (A)(1) or 840.101 (A)(2), the use of a cord and plug for the connection to the network terminal grounding connection shall be permitted. Informational Note: If required to be grounded, a listed device that extends the equipment grounding conductor from the receptacle to the network terminal equipment grounding terminal is permitted. Sizing of the extended equipment grounding conductor is covered in Table 250.122. [840.101_(C)](https://2023.antflix.net#840.101_(C))", + "displayTitle": "(C) Network Terminal Grounding", + "children": [], + "url": "https://2023.antflix.net#840.101_(C)" + } + ], + "url": "https://2023.antflix.net#840.101" + }, + { + "body": "If circuits leave the building to power equipment remote to the building or outside the exterior zone of protection defined by a 46 m (150 ft) radius rolling sphere, the installation of communications wires and cables shall comply with 800.100 and 800.106, and the installation of coaxial cables shall comply with 820.100 and 800.106. Informational Note: See NFPA 780-2020, Standard for the Installation of Lightning Protection Systems, for the application of the term rolling sphere. [840.102](https://2023.antflix.net#840.102)", + "displayTitle": "840.102 Premises Circuits Leaving the Building", + "children": [], + "url": "https://2023.antflix.net#840.102" + }, + { + "displayTitle": "Part VI Premises Powering of Communications Equipment Over Communications Cables", + "children": [], + "url": "https://2023.antflix.net#divider_24_VI" + }, + { + "body": "Listed communications cables, in addition to carrying the communications circuit, shall also be permitted to carry circuits for powering listed communications equipment. The power source shall be listed in accordance with 840.170(C). Installation of the listed 4-pair communications cables for a communications circuit or installation where 4-pair communications cables are substituted for Class 2 and Class 3 cables in accordance with 722.135(E) shall comply with 725.144. Exception: Installing communications cables in compliance with 725.144 shall not be required for listed 4-pair communications cables where the rated current of the power source does not exceed 0.3 amperes in any conductor 24 AWG or larger. Informational Note No. 1: A typical communications cable for this application is a 4-pair cable sometimes referred to as Category 5e (or higher) LAN cable or balanced twisted pair cable. These types of cables are often used to provide Ethernet-and Power over Ethernet (PoE)-type services. Informational Note No. 2: See 725.144 for requirements to manage the temperature rise of bundles of cables that provide power. [840.160](https://2023.antflix.net#840.160)", + "displayTitle": "840.160 Powering Circuits", + "children": [], + "url": "https://2023.antflix.net#840.160" + }, + { + "displayTitle": "Part VII Listing Requirements", + "children": [], + "url": "https://2023.antflix.net#divider_16_VII" + }, + { + "body": "Premises-powered broadband communications systems equipment and cables shall comply with 840.170(A) through (D). [840.170](https://2023.antflix.net#840.170)", + "displayTitle": "840.170 Equipment and Cables", + "children": [ + { + "body": "The network terminal and applicable grounding means shall be listed for application with premises-powered broadband communications systems. Informational Note No. 1: See ANSI/UL 60950-1-2014, Standard for Safety of Information Technology Equipment, ANSI/ UL 498A-2015, Current Taps and Adapters; ANSI/UL 467-2013, Grounding and Bonding Equipment; or ANSI/UL 62368-1-2014, Audio/Video, Information and Communication Technology Equipment - Part I: Safety Requirements. Informational Note No. 2: There are no requirements on the network terminal and its grounding methodologies except for those covered by the listing of the product. [840.170_(A)](https://2023.antflix.net#840.170_(A))", + "displayTitle": "(A) Network Terminal", + "children": [], + "url": "https://2023.antflix.net#840.170_(A)" + }, + { + "body": "Communications wires and cables shall be listed and marked in accordance with 800.179. [840.170_(B)](https://2023.antflix.net#840.170_(B))", + "displayTitle": "(B) Premises Communications Wires and Cables", + "children": [], + "url": "https://2023.antflix.net#840.170_(B)" + }, + { + "body": "The power source for circuits intended to provide power over communications cables to remote equipment shall be limited in accordance with Table 11 (B) in Chapter 9 for voltage sources up to 60 volts dc and be listed as specified in either of the following: A power source shall be listed as specified in 725.60(A)(1), (A)(2), (A)(3), or (A)(4). The power sources shall not have the output connections paralleled or otherwise interconnected unless listed for such interconnection.A power source shall be listed as communications equipment for limited-power circuits.Informational Note: See ANSI/UL 60950-1-2014, Standard far Safety of Information Technology Equipment-Safety \u2014 Part 1, or ANSI/UL 62368-1-2014, Audio/Video, Information and Communication Technology Equipment \u2014 Part 1: Safety Requirements. Typically, such circuits are used to interconnect equipment for the purpose of exchanging information (data). [840.170_(C)](https://2023.antflix.net#840.170_(C))", + "displayTitle": "(C) Power Source", + "children": [], + "url": "https://2023.antflix.net#840.170_(C)" + }, + { + "body": "Communications accessory equipment and/or assemblies shall be listed for application with premises-powered communications systems. Informational Note: See ANSI/UL 1863-2004, Communications-Circuit Accessories. [840.170_(D)](https://2023.antflix.net#840.170_(D))", + "displayTitle": "(D) Accessory Equipment", + "children": [], + "url": "https://2023.antflix.net#840.170_(D)" + } + ], + "url": "https://2023.antflix.net#840.170" + } + ], + "url": "https://2023.antflix.net#840" + } + ], + "url": "https://2023.antflix.net#8" + } + ], + "Chapter 9 Tables": [ + { + "Table": "Table 4 Dimensions and Percent Area of Conduit and Tubing", + "data": [ + { + "Conduits": [ + { + "Type": "EMT", + "Trade Size": "1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "78", + "in.2": "0.122" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "196", + "in.2": "0.304" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "3/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "137", + "in.2": "0.213" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "343", + "in.2": "0.533" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "1", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "222", + "in.2": "0.346" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "556", + "in.2": "0.864" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "1-1/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "387", + "in.2": "0.598" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "968", + "in.2": "1.496" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "1-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "526", + "in.2": "0.814" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "1314", + "in.2": "2.036" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "866", + "in.2": "1.342" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "2165", + "in.2": "3.356" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "2-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "1513", + "in.2": "2.343" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "3783", + "in.2": "5.858" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "3", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "2280", + "in.2": "3.538" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "5701", + "in.2": "8.846" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "3-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "2980", + "in.2": "4.618" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "7451", + "in.2": "11.545" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "3808", + "in.2": "5.901" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "9521", + "in.2": "14.753" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "5", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "5220", + "in.2": "8.085" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "13050", + "in.2": "20.212" + }, + "url": "https://2023.antflix.net#table_4(EMT)" + }, + { + "Type": "EMT", + "Trade Size": "6", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "7528", + "in.2": "11.663" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "18821", + "in.2": "29.158" + }, + "url": "https://2023.antflix.net#table_4(ENT)" + }, + { + "Type": "ENT", + "Trade Size": "1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "73", + "in.2": "0.114" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "184", + "in.2": "0.285" + }, + "url": "https://2023.antflix.net#table_4(ENT)" + }, + { + "Type": "ENT", + "Trade Size": "3/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "131", + "in.2": "0.203" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "328", + "in.2": "0.508" + }, + "url": "https://2023.antflix.net#table_4(ENT)" + }, + { + "Type": "ENT", + "Trade Size": "1", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "215", + "in.2": "0.333" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "537", + "in.2": "0.832" + }, + "url": "https://2023.antflix.net#table_4(ENT)" + }, + { + "Type": "ENT", + "Trade Size": "1-1/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "375", + "in.2": "0.581" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "937", + "in.2": "1.453" + }, + "url": "https://2023.antflix.net#table_4(ENT)" + }, + { + "Type": "ENT", + "Trade Size": "1-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "512", + "in.2": "0.794" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "1281", + "in.2": "1.986" + }, + "url": "https://2023.antflix.net#table_4(ENT)" + }, + { + "Type": "ENT", + "Trade Size": "2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "849", + "in.2": "1.316" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "2123", + "in.2": "3.291" + }, + "url": "https://2023.antflix.net#table_4(ENT)" + }, + { + "Type": "ENT", + "Trade Size": "2-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table_4(ENT)" + }, + { + "Type": "ENT", + "Trade Size": "3", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table_4(ENT)" + }, + { + "Type": "ENT", + "Trade Size": "3-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "3/8", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "30", + "in.2": "0.046" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "74", + "in.2": "0.116" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "81", + "in.2": "0.127" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "204", + "in.2": "0.317" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "3/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "137", + "in.2": "0.213" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "343", + "in.2": "0.533" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "1", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "211", + "in.2": "0.327" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "527", + "in.2": "0.817" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "1-1/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "330", + "in.2": "0.511" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "824", + "in.2": "1.277" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "1-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "480", + "in.2": "0.743" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "1201", + "in.2": "1.858" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "843", + "in.2": "1.307" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "2107", + "in.2": "3.269" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "2-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "1267", + "in.2": "1.963" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "3167", + "in.2": "4.909" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "3", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "1824", + "in.2": "2.827" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "4560", + "in.2": "7.069" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "3-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "2483", + "in.2": "3.848" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "6207", + "in.2": "9.621" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "FMC", + "Trade Size": "4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "3243", + "in.2": "5.027" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "8107", + "in.2": "12.566" + }, + "url": "https://2023.antflix.net#table-4(FMC)" + }, + { + "Type": "IMC", + "Trade Size": "3/8", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://code.antflix.net/NEC-2023.pdf#page=720" + }, + { + "Type": "IMC", + "Trade Size": "1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "89", + "in.2": "0.137" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "222", + "in.2": "0.342" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "3/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "151", + "in.2": "0.235" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "377", + "in.2": "0.586" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "1", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "248", + "in.2": "0.384" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "620", + "in.2": "0.959" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "1-1/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "425", + "in.2": "0.659" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "1064", + "in.2": "1.647" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "1-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "573", + "in.2": "0.890" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "1432", + "in.2": "2.225" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "937", + "in.2": "1.452" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "2341", + "in.2": "3.630" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "2-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "1323", + "in.2": "2.054" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "3308", + "in.2": "5.135" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "3", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "2046", + "in.2": "3.169" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "5115", + "in.2": "7.922" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "3-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "2729", + "in.2": "4.234" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "6822", + "in.2": "10.584" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "3490", + "in.2": "5.452" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "8725", + "in.2": "13.631" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "5", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "5455", + "in.2": "8.528" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "13639", + "in.2": "21.32" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "IMC", + "Trade Size": "6", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "7878", + "in.2": "12.304" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "19696", + "in.2": "30.76" + }, + "url": "https://2023.antflix.net#table_4(IMC)" + }, + { + "Type": "LFNC", + "Trade Size": "3/8", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "50", + "in.2": "0.077" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "125", + "in.2": "0.192" + }, + "url": "https://2023.antflix.net#table_4(LFNC-A)" + }, + { + "Type": "LFNC", + "Trade Size": "1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "80", + "in.2": "0.125" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "201", + "in.2": "0.312" + }, + "url": "https://2023.antflix.net#table_4(LFNC-A)" + }, + { + "Type": "LFNC", + "Trade Size": "3/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "139", + "in.2": "0.214" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "346", + "in.2": "0.535" + }, + "url": "https://2023.antflix.net#table_4(LFNC-A)" + }, + { + "Type": "LFNC", + "Trade Size": "1", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "221", + "in.2": "0.342" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "552", + "in.2": "0.854" + }, + "url": "https://2023.antflix.net#table_4(LFNC-A)" + }, + { + "Type": "LFNC", + "Trade Size": "1-1/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "387", + "in.2": "0.601" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "968", + "in.2": "1.502" + }, + "url": "https://2023.antflix.net#table_4(LFNC-A)" + }, + { + "Type": "LFNC", + "Trade Size": "1-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "520", + "in.2": "0.807" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "1301", + "in.2": "2.018" + }, + "url": "https://2023.antflix.net#table_4(LFNC-A)" + }, + { + "Type": "LFNC", + "Trade Size": "2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "863", + "in.2": "1.337" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "2157", + "in.2": "3.343" + }, + "url": "https://2023.antflix.net#table_4(LFNC-A)" + }, + { + "Type": "LFNC", + "Trade Size": "6", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "6", + "in.2": "6" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "6", + "in.2": "6" + }, + "url": "https://2023.antflix.net#table_4(LFNC-A)" + }, + { + "Type": "LFNC", + "Trade Size": "3/8", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "49", + "in.2": "0.077" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "123", + "in.2": "0.192" + }, + "url": "https://2023.antflix.net#table_4(LFNC-B)" + }, + { + "Type": "LFNC", + "Trade Size": "1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "81", + "in.2": "0.125" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "204", + "in.2": "0.314" + }, + "url": "https://2023.antflix.net#table_4(LFNC-B)" + }, + { + "Type": "LFNC", + "Trade Size": "3/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "140", + "in.2": "0.216" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "350", + "in.2": "0.541" + }, + "url": "https://2023.antflix.net#table_4(LFNC-B)" + }, + { + "Type": "LFNC", + "Trade Size": "1", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "226", + "in.2": "0.349" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "564", + "in.2": "0.873" + }, + "url": "https://2023.antflix.net#table_4(LFNC-B)" + }, + { + "Type": "LFNC", + "Trade Size": "1-1/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "394", + "in.2": "0.611" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "984", + "in.2": "1.528" + }, + "url": "https://2023.antflix.net#table_4(LFNC-B)" + }, + { + "Type": "LFNC", + "Trade Size": "1-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "510", + "in.2": "0.792" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "1276", + "in.2": "1.981" + }, + "url": "https://2023.antflix.net#table_4(LFNC-B)" + }, + { + "Type": "LFNC", + "Trade Size": "2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "836", + "in.2": "1.298" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "2091", + "in.2": "3.246" + }, + "url": "https://2023.antflix.net#table_4(LFNC-B)" + }, + { + "Type": "LFNC", + "Trade Size": "5", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "5", + "in.2": "5" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "5", + "in.2": "5" + }, + "url": "https://2023.antflix.net#table_4(LFNC-B)" + }, + { + "Type": "LFNC", + "Trade Size": "3/8", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "47.7", + "in.2": "0.074" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "119.19", + "in.2": "0.185" + }, + "url": "https://2023.antflix.net#table_4(LFNC-C)" + }, + { + "Type": "LFNC", + "Trade Size": "1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "77.9", + "in.2": "0.121" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "194.778", + "in.2": "0.302" + }, + "url": "https://2023.antflix.net#table_4(LFNC-C)" + }, + { + "Type": "LFNC", + "Trade Size": "3/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "134.6", + "in.2": "0.209" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "336.568", + "in.2": "0.522" + }, + "url": "https://2023.antflix.net#table_4(LFNC-C)" + }, + { + "Type": "LFNC", + "Trade Size": "1", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "215.0", + "in.2": "0.333" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "537.566", + "in.2": "0.833" + }, + "url": "https://2023.antflix.net#table_4(LFNC-C)" + }, + { + "Type": "LFNC", + "Trade Size": "1-1/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "380.4", + "in.2": "0.590" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "951.039", + "in.2": "1.474" + }, + "url": "https://2023.antflix.net#table_4(LFNC-C)" + }, + { + "Type": "LFNC", + "Trade Size": "1-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "509.2", + "in.2": "0.789" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "1272.963", + "in.2": "1.973" + }, + "url": "https://2023.antflix.net#table_4(LFNC-C)" + }, + { + "Type": "LFNC", + "Trade Size": "2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "847.6", + "in.2": "1.314" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "2119.063", + "in.2": "3.285" + }, + "url": "https://2023.antflix.net#table_4(LFNC-C)" + }, + { + "Type": "LFNC", + "Trade Size": "4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "4", + "in.2": "4" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "4", + "in.2": "4" + }, + "url": "https://2023.antflix.net#table_4(LFNC-C)" + }, + { + "Type": "Liquidtight Flexible Metal Conduit (LFMC)", + "Trade Size": "3/8", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "49", + "in.2": "0.077" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "123", + "in.2": "0.192" + }, + "url": "https://2023.antflix.net#table_4(LFMC)" + }, + { + "Type": "Liquidtight Flexible Metal Conduit (LFMC)", + "Trade Size": "1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "81", + "in.2": "0.125" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "204", + "in.2": "0.314" + }, + "url": "https://2023.antflix.net#table_4(LFMC)" + }, + { + "Type": "Liquidtight 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"mm.2": "510", + "in.2": "0.792" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "1276", + "in.2": "1.981" + }, + "url": "https://2023.antflix.net#table_4(LFMC)" + }, + { + "Type": "Liquidtight Flexible Metal Conduit (LFMC)", + "Trade Size": "2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "836", + "in.2": "1.298" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "2091", + "in.2": "3.246" + }, + "url": "https://2023.antflix.net#table_4(LFMC)" + }, + { + "Type": "Liquidtight Flexible Metal Conduit (LFMC)", + "Trade Size": "2-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "1259", + "in.2": "1.953" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "3147", + "in.2": "4.881" + }, + "url": "https://2023.antflix.net#table_4(LFMC)" + }, + { + "Type": "Liquidtight Flexible Metal Conduit (LFMC)", + "Trade Size": "3", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "1931", + "in.2": "2.990" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "4827", + "in.2": 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"https://2023.antflix.net#table_4(PVC-A)" + }, + { + "Type": "Type A, Rigid PVC Conduit (PVC)", + "Trade Size": "2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "940", + "in.2": "1.459" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "2350", + "in.2": "3.647" + }, + "url": "https://2023.antflix.net#table_4(PVC-A)" + }, + { + "Type": "Type A, Rigid PVC Conduit (PVC)", + "Trade Size": "2-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "1406", + "in.2": "2.181" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "3515", + "in.2": "5.453" + }, + "url": "https://2023.antflix.net#table_4(PVC-A)" + }, + { + "Type": "Type A, Rigid PVC Conduit (PVC)", + "Trade Size": "3", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "2112", + "in.2": "3.278" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "5281", + "in.2": "8.194" + }, + "url": "https://2023.antflix.net#table_4(PVC-A)" + }, + { + "Type": "Type A, Rigid PVC Conduit (PVC)", + "Trade Size": "3-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "2758", + "in.2": "4.278" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "6896", + "in.2": "10.694" + }, + "url": "https://2023.antflix.net#table_4(PVC-A)" + }, + { + "Type": "Type A, Rigid PVC Conduit (PVC)", + "Trade Size": "4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "3543", + "in.2": "5.489" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "8858", + "in.2": "13.723" + }, + "url": "https://2023.antflix.net#table_4(PVC-A)" + }, + { + "Type": "Type A, Rigid PVC Conduit (PVC)", + "Trade Size": "5", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table_4(PVC-A)" + }, + { + "Type": "Type A, Rigid PVC Conduit (PVC)", + "Trade Size": "6", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table_4(PVC-A)" + }, + { + "Type": "PVC", + "Trade Size": "1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "3/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "1", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "1-1/4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "1-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "999", + "in.2": "1.550" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "2498", + "in.2": "3.874" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "2-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "-", + "in.2": "-" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "-", + "in.2": "-" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "3", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "2248", + "in.2": "3.484" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "5621", + "in.2": "8.709" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "3-1/2", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "2932", + "in.2": "4.546" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "7329", + "in.2": "11.365" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "4", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "3726", + "in.2": "5.779" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "9314", + "in.2": "14.448" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "5", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "5726", + "in.2": "8.878" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "14314", + "in.2": "22.195" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + }, + { + "Type": "PVC", + "Trade Size": "6", + "Fill Capacity": { + "Over 2 Wires 40%": { + "mm.2": "8133", + "in.2": "12.612" + } + }, + "Total Area 100%(nipple)": { + "mm.2": "20333", + "in.2": "31.530" + }, + "url": "https://2023.antflix.net#table_4(PVC-EB)" + } + ] + } + ], + "url": "https://2023.antflix.net#table_4" + }, + { + "Table": "Table 5 Dimensions of Insulated Conductors and Fixture Wires", + "data": [ + { + "Conductors": [ + { + "Type": "RFH-2,FFH-2, RFHH-2", + "Sizes": [ + { + "Size(AWG or kcmil)": "18", + "Approximate Area": { + "mm.2": "9.355", + "in.2": "0.0145" + }, + "Approximate Diameter": { + "mm.2": "3.454", + "in.2": "0.136" + } + }, + { + "Size(AWG or kcmil)": "16", + "Approximate Area": { + "mm.2": "11.10", + "in.2": "0.0172" + }, + "Approximate Diameter": { + "mm.2": "3.759", + "in.2": "0.148" + } + } + ], + "url": "https://2023.antflix.net#table_5(RFH-2)" + }, + { + "Type": "RHH, RHW, RHW-2", + "Sizes": [ + { + "Size(AWG or kcmil)": "14", + "Approximate Area": { + "mm.2": "18.90", + "in.2": "0.0293" + }, + "Approximate Diameter": { + "mm.2": "4.902", + "in.2": "0.193" + } + }, + { + "Size(AWG or kcmil)": "12", + "Approximate Area": { + "mm.2": "22.77", + "in.2": "0.0353" + }, + "Approximate Diameter": { + "mm.2": "5.385", + "in.2": "0.212" + } + }, + { + "Size(AWG or kcmil)": "10", + "Approximate Area": { + "mm.2": "28.19", + "in.2": "0.0437" + }, + "Approximate Diameter": { + "mm.2": "5.994", + "in.2": "0.236" + } + }, + { + "Size(AWG or kcmil)": "8", + "Approximate Area": { + "mm.2": "53.87", + "in.2": "0.0835" + }, + "Approximate Diameter": { + "mm.2": "8.280", + "in.2": "0.326" + } + }, + { + "Size(AWG or kcmil)": "6", + "Approximate Area": { + "mm.2": "67.16", + "in.2": "0.1041" + }, + "Approximate Diameter": { + "mm.2": "9.246", + "in.2": "0.364" + } + }, + { + "Size(AWG or kcmil)": "4", + "Approximate Area": { + "mm.2": "86.00", + "in.2": "0.1333" + }, + "Approximate Diameter": { + "mm.2": "10.46", + "in.2": "0.412" + } + }, + { + "Size(AWG or kcmil)": "3", + "Approximate Area": { + "mm.2": "98.13", + "in.2": "0.1521" + }, + "Approximate Diameter": { + "mm.2": "11.18", + "in.2": "0.440" + } + }, + { + "Size(AWG or kcmil)": "2", + "Approximate Area": { + "mm.2": "112.9", + "in.2": "0.1750" + }, + "Approximate Diameter": { + "mm.2": "11.99", + "in.2": "0.472" + } + }, + { + "Size(AWG or kcmil)": "1", + "Approximate Area": { + "mm.2": "171.6", + "in.2": "0.2660" + }, + "Approximate Diameter": { + "mm.2": "14.78", + "in.2": "0.582" + } + }, + { + "Size(AWG or kcmil)": "1/0", + "Approximate Area": { + "mm.2": "196.1", + "in.2": "0.3039" + }, + "Approximate Diameter": { + "mm.2": "15.80", + "in.2": "0.622" + } + }, + { + "Size(AWG or kcmil)": "2/0", + "Approximate Area": { + "mm.2": "226.1", + "in.2": "0.3505" + }, + "Approximate Diameter": { + "mm.2": "16.97", + "in.2": "0.668" + } + }, + { + "Size(AWG or kcmil)": "3/0", + "Approximate Area": { + "mm.2": "262.7", + "in.2": "0.4072" + }, + "Approximate Diameter": { + "mm.2": "18.29", + "in.2": "0 720" + } + }, + { + "Size(AWG or kcmil)": "4/0", + "Approximate Area": { + "mm.2": "306.7", + "in.2": "0.4754" + }, + "Approximate Diameter": { + "mm.2": "19.76", + "in.2": "0.778" + } + }, + { + "Size(AWG or kcmil)": "250", + "Approximate Area": { + "mm.2": "405.9", + "in.2": "0.6291" + }, + "Approximate Diameter": { + "mm.2": "22.73", + "in.2": "0.895" + } + }, + { + "Size(AWG or kcmil)": "300", + "Approximate Area": { + "mm.2": "457.3", + "in.2": "0.7088" + }, + "Approximate Diameter": { + "mm.2": "24.13", + "in.2": "0.950" + } + }, + { + "Size(AWG or kcmil)": "350", + "Approximate Area": { + "mm.2": "507.7", + "in.2": "0.7870" + }, + "Approximate Diameter": { + "mm.2": "25.43", + "in.2": "1.001" + } + }, + { + "Size(AWG or kcmil)": "400", + "Approximate Area": { + "mm.2": "556.5", + "in.2": "0.8626" + }, + "Approximate Diameter": { + "mm.2": "26.62", + "in.2": "1.048" + } + }, + { + "Size(AWG or kcmil)": "500", + "Approximate Area": { + "mm.2": "650.5", + "in.2": "1.0082" + }, + "Approximate Diameter": { + "mm.2": "28.78", + "in.2": "1.133" + } + }, + { + "Size(AWG or kcmil)": "600", + "Approximate Area": { + "mm.2": "782.9", + "in.2": "1.2135" + }, + "Approximate Diameter": { + "mm.2": "31.57", + "in.2": "1.243" + } + }, + { + "Size(AWG or kcmil)": "700", + "Approximate Area": { + "mm.2": "874.9", + "in.2": "1.3561" + }, + "Approximate Diameter": { + "mm.2": "33.38", + "in.2": "1.314" + } + }, + { + "Size(AWG or kcmil)": "750", + "Approximate Area": { + "mm.2": "920.8", + "in.2": "1.4272" + }, + "Approximate Diameter": { + "mm.2": "34.24", + "in.2": "1.348" + } + }, + { + "Size(AWG or kcmil)": "800", + "Approximate Area": { + "mm.2": "965.0", + "in.2": "1.4957" + }, + "Approximate Diameter": { + "mm.2": "35.05", + "in.2": "1.380" + } + }, + { + "Size(AWG or kcmil)": "900", + "Approximate Area": { + "mm.2": "1057", + "in.2": "1.6377" + }, + "Approximate Diameter": { + "mm.2": "36.68", + "in.2": "1.444" + } + }, + { + "Size(AWG or kcmil)": "1000", + "Approximate Area": { + "mm.2": "1143", + "in.2": "1.7719" + }, + "Approximate Diameter": { + "mm.2": "38.15", + "in.2": "1.502" + } + }, + { + "Size(AWG or kcmil)": "1250", + "Approximate Area": { + "mm.2": "1515", + "in.2": "2.3479" + }, + "Approximate Diameter": { + "mm.2": "43.92", + "in.2": "1.729" + } + }, + { + "Size(AWG or kcmil)": "1500", + "Approximate Area": { + "mm.2": "1738", + "in.2": "2.6938" + }, + "Approximate Diameter": { + "mm.2": "47.04", + "in.2": "1.852" + } + }, + { + "Size(AWG or kcmil)": "1750", + "Approximate Area": { + "mm.2": "1959", + "in.2": "3.0357" + }, + "Approximate Diameter": { + "mm.2": "49.94", + "in.2": "1.966" + } + }, + { + "Size(AWG or kcmil)": "2000", + "Approximate Area": { + "mm.2": "2175", + "in.2": "3.3719" + }, + "Approximate Diameter": { + "mm.2": "52.63", + "in.2": "2.072" + } + } + ], + "url": "https://2023.antflix.net#table_5(RHH)" + }, + { + "Type": "SF-2, SFF-2", + "Sizes": [ + { + "Size(AWG or kcmil)": "18", + "Approximate Area": { + "mm.2": "7.419", + "in.2": "0.0115" + }, + "Approximate Diameter": { + "mm.2": "3.073", + "in.2": "0.121" + } + }, + { + "Size(AWG or kcmil)": "16", + "Approximate Area": { + "mm.2": "8.968", + "in.2": "0.0139" + }, + "Approximate Diameter": { + "mm.2": "3.378", + "in.2": "0.133" + } + }, + { + "Size(AWG or kcmil)": "14", + "Approximate Area": { + "mm.2": "11.10", + "in.2": "0.0172" + }, + "Approximate Diameter": { + "mm.2": "3.759", + "in.2": "0.148" + } + } + ], + "url": "https://code.antflix.net/NEC-2023.pdf#page=723" + }, + { + "Type": "SF-1, SFF-1", + "Sizes": [ + { + "Size(AWG or kcmil)": "18", + "Approximate Area": { + "mm.2": "4.194", + "in.2": "0.0065" + }, + "Approximate Diameter": { + "mm.2": "2.311", + "in.2": "0.091" + } + } + ], + "url": "https://code.antflix.net/NEC-2023.pdf#page=723" + }, + { + "Type": "RFH-1, TF, TFF, XF, XFF", + "Sizes": [ + { + "Size(AWG or kcmil)": "18", + "Approximate Area": { + "mm.2": "5.161", + "in.2": "0.0088" + }, + "Approximate Diameter": { + "mm.2": "2.692", + "in.2": "0.106" + } + } + ], + "url": "https://code.antflix.net/NEC-2023.pdf#page=723" + }, + { + "Type": "TF, TFF, XF, XFF", + "Sizes": [ + { + "Size(AWG or kcmil)": "16", + "Approximate Area": { + "mm.2": "7.032", + "in.2": "0.0109" + }, + "Approximate Diameter": { + "mm.2": "2.997", + "in.2": "0.118" + } + } + ], + "url": "https://code.antflix.net/NEC-2023.pdf#page=724" + }, + { + "Type": "TW, XF, XFF, THHW, THW,THW-2", + "Sizes": [ + { + "Size(AWG or kcmil)": "14", + "Approximate Area": { + "mm.2": "8.968", + "in.2": "0.0139" + }, + "Approximate Diameter": { + "mm.2": "3.378", + "in.2": "0.133" + } + } + ], + "url": "https://2023.antflix.net#table_5(TW)" + }, + { + "Type": "TW, THHW, THW, THW-2", + "Sizes": [ + { + "Size(AWG or kcmil)": "12", + "Approximate Area": { + "mm.2": "11.68", + "in.2": "0.0181" + }, + "Approximate Diameter": { + "mm.2": "3.861", + "in.2": "0.152" + } + }, + { + "Size(AWG or kcmil)": "10", + "Approximate Area": { + "mm.2": "15.68", + "in.2": "0.0243" + }, + "Approximate Diameter": { + "mm.2": "4.470", + "in.2": "0.176" + } + }, + { + "Size(AWG or kcmil)": "8", + "Approximate Area": { + "mm.2": "28.19", + "in.2": "0.0437" + }, + "Approximate Diameter": { + "mm.2": "5.994", + "in.2": "0.236" + } + } + ], + "url": "https://2023.antflix.net#table_5(THHN)" + }, + { + "Type": "RHH, RHW, RHW-2", + "Sizes": [ + { + "Size(AWG or kcmil)": "14", + "Approximate Area": { + "mm.2": "13.48", + "in.2": "0.0209" + }, + "Approximate Diameter": { + "mm.2": "4.140", + "in.2": "0.163" + } + } + ], + "url": "https://code.antflix.net/NEC-2023.pdf#page=724" + }, + { + "Type": "RHH, RHW, RHW-2, XF, XFF", + "Sizes": [ + { + "Size(AWG or kcmil)": "12", + "Approximate Area": { + "mm.2": "16.77", + "in.2": "0.0260" + }, + "Approximate Diameter": { + "mm.2": "4.623", + "in.2": "0.182" + } + } + ], + "url": "https://code.antflix.net/NEC-2023.pdf#page=724" + }, + { + "Type": "RHH, RHW, RHW-2, XF, XFF", + "Sizes": [ + { + "Size(AWG or kcmil)": "10", + "Approximate Area": { + "mm.2": "21.48", + "in.2": "0.0333" + }, + "Approximate Diameter": { + "mm.2": "5.232", + "in.2": "0.206" + } + } + ], + "url": "https://code.antflix.net/NEC-2023.pdf#page=724" + }, + { + "Type": "RHH, RHW, RHW-2", + "Sizes": [ + { + "Size(AWG or kcmil)": "8", + "Approximate Area": { + "mm.2": "35.87", + "in.2": "0.0556" + }, + "Approximate Diameter": { + "mm.2": "6.756", + "in.2": "0.266" + } + } + ], + "url": "https://code.antflix.net/NEC-2023.pdf#page=724" + }, + { + "Type": "TW, THW, THHW. THW-2,RHH, RHW, RHW-2", + "Sizes": [ + { + "Size(AWG or kcmil)": "6", + "Approximate Area": { + "mm.2": "46.84", + "in.2": "0.0726" + }, + "Approximate Diameter": { + "mm.2": "7.722", + "in.2": "0.304" + } + }, + { + "Size(AWG or kcmil)": "4", + "Approximate Area": { + "mm.2": "62.77", + "in.2": "0.0973" + }, + "Approximate Diameter": { + "mm.2": "8.941", + "in.2": "0.352" + } + }, + { + "Size(AWG or kcmil)": "3", + "Approximate Area": { + "mm.2": "73.16", + "in.2": "0.1134" + }, + "Approximate Diameter": { + "mm.2": "9.652", + "in.2": "0.380" + } + }, + { + "Size(AWG or kcmil)": "2", + "Approximate Area": { + "mm.2": "86.00", + "in.2": "0.1333" + }, + "Approximate Diameter": { + "mm.2": "10.46", + "in.2": "0.412" + } + }, + { + "Size(AWG or kcmil)": "1", + "Approximate Area": { + "mm.2": "122.6", + "in.2": "0.1901" + }, + "Approximate Diameter": { + "mm.2": "12.50", + "in.2": "0.492" + } + }, + { + "Size(AWG or kcmil)": "1/0", + "Approximate Area": { + "mm.2": "143.4", + "in.2": "0.2223" + }, + "Approximate Diameter": { + "mm.2": "13.51", + "in.2": "0.532" + } + }, + { + "Size(AWG or kcmil)": "2/0", + "Approximate Area": { + "mm.2": "169.3", + "in.2": "0.2624" + }, + "Approximate Diameter": { + "mm.2": "14.68", + "in.2": "0.578" + } + }, + { + "Size(AWG or kcmil)": "3/0", + "Approximate Area": { + "mm.2": "201.1", + "in.2": "0.3117" + }, + "Approximate Diameter": { + "mm.2": "16.00", + "in.2": "0.630" + } + }, + { + "Size(AWG or kcmil)": "4/0", + "Approximate Area": { + "mm.2": "239.9", + "in.2": "0.3718" + }, + "Approximate Diameter": { + "mm.2": "17.48", + "in.2": "0.688" + } + }, + { + "Size(AWG or kcmil)": "250", + "Approximate Area": { + "mm.2": "296.5", + "in.2": "0.4596" + }, + "Approximate Diameter": { + "mm.2": "19.43", + "in.2": "0.765" + } + }, + { + "Size(AWG or kcmil)": "300", + "Approximate Area": { + "mm.2": "340.7", + "in.2": "0.5281" + }, + "Approximate Diameter": { + "mm.2": "20.83", + "in.2": "0.820" + } + }, + { + "Size(AWG or kcmil)": 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