**November 21, 1997**

**Contract \#** **TW-0928**

SPECIAL SPECIFICATION

SECTION 16495-S

[TRANSFER SWITCHES]{.underline}

Page

[PART 1 - GENERAL]{.underline}

1.01 Related Documents 1

1.02 Summary 1

1.03 Remote Annuciation System Description 1

1.04 Submittals 2

1.05 Quality Assurance 2

PART 2 - PRODUCTS

2.01 Manufacturers 3

2.02 General Transfer-Switch Product Requirements 4

2.03 Automatic Transfer Switch (ATS) 6

2.04 Automatic Transfer-Switch Features 7

2.05 Bypass/Isolation Switch 8

2.06 Remote Annuciator System 9

2.07 Finishes 10

2.08 Source Quality Control 10

PART 3 - EXECUTION

3.01 Installation 10

3.02 Wiring To Remote Components 11

3.03 Connections 11

3.04 Grounding 11

3.05 Field Quality Control 11

3.06 Demonstration 12

**SPECIAL SPECIFICATION**

**MASTERSPEC text, Copyright 1995, AIA, The American Institute of
Architects**

**Paragraph number formatting method, Copyright 1988, ARCOM,
Architectural Computer Services, Inc.**

**SECTION 16495-S**

**[TRANSFER SWITCHES]{.underline}**

[PART 1 - GENERAL]{.underline}

1.01 [RELATED DOCUMENTS]{.underline}

> A. Drawings and general provisions of the Contract, including General
> and Supplementary Conditions and Division 1 Specification Sections,
> apply to this Section.

1.02 [SUMMARY]{.underline}

> A. This Section includes transfer switches rated 600 V and less. It
> includes the following items:

ADJUST LIST BELOW TO SUIT PROJECT.

1.  Automatic transfer switch.

2\. Bypass/isolation switch.

3\. Remote annunciation system.

B. Related Sections include the following:

LIST BELOW ONLY PRODUCTS, CONSTRUCTION, AND EQUIPMENT FOR THIS PROJECT
THAT THE READER MIGHT EXPECT TO FIND IN THIS SECTION BUT ARE SPECIFIED
ELSEWHERE. VERIFY THAT THE SECTION TITLES LISTED BELOW ARE CORRECT FOR
THIS PROJECT\'S SPECIFICATIONS.

> 1\. Transfer switches integral with uninterruptible power supply
> systems are specified in Division 16 Section "Uninterruptible Power
> Supply Systems."

2\. Conductors for hard-wired connections between transfer switches and
remote equipment are specified in Division 16 Section \"Electrical
Work.\"

1.03 [REMOTE ANNUCIATION SYSTEM DESCRIPTION]{.underline}

A.  Functional Description: A remote annuciator panel annunciates
    conditions at indicated transfer switches including:

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1.  Source available (as defined by actual pick-up and drop-out settings
    of transfer witch controls).

2.  Switch position.

> 3\. Switch in test mode.
>
> 4\. Failure of digital communication link.

1.04 [SUBMITTALS]{.underline}

> A. Product Data: For each switch specified. Include dimensioned plans,
> sections, and elevations showing minimum clearances, conductor entry
> provisions, gutter space, installed features and devices, and
> materials lists.
>
> B. Wiring Diagrams: Details of wiring for transfer switches and
> differentiating between manufacturer-installed and field-installed
> wiring. Show both power and control wiring.

DELETE PARA BELOW IF BYPASS/ISOLATION SWITCH IS NOT REQUIRED.

> C. Single-Line Diagram: For each combined transfer switch and
> bypass/isolation switch, show connections between transfer switch,
> bypass/isolation switch, power sources, and load; and show
> interlocking provisions.
>
> D. Product Certificates: Signed by manufacturer certifying that
> products furnished comply with requirements and that switches have
> been tested for short-circuit closing and withstand ratings applicable
> to units for Project.
>
> E. Qualification Data: For firms and persons specified in the
> \"Quality Assurance\" Article.
>
> F. Field Test Reports: Indicate and interpret test results for
> compliance with performance requirements.
>
> G. Maintenance Data: For each type of product to include in the
> maintenance manuals specified in Division 1. Include all features and
> operating sequences, both automatic and manual. List all factory
> settings of relays and provide relay-setting and calibration
> instructions.
>
> H. Submit the above in accordance with Section 1300-S.

1.05 [QUALITY ASSURANCE]{.underline}

> A. Testing Agency Qualifications: In addition to requirements
> specified in Division 1 Section \"Quality Control,\" an independent
> testing agency shall meet OSHA criteria for accreditation of testing
> laboratories, Title 29, Part 1907, or shall be a full member company
> of the InterNational Electrical Testing Association.
>
> 1\. Testing Agency\'s Field Supervisor: Person currently certified by
> the InterNational Electrical Testing Association or National Institute
> for Certification in Engineering Technologies, to supervise on-site
> testing specified in Part 3.

REVISE RESPONSE TIME IN PARA BELOW TO SUIT PROJECT.

> B. Emergency Service: Manufacturer maintains a service center capable
> of providing emergency maintenance and repairs at Project site with an
> 8-hour maximum response time.

DELETE OR EDIT PARA BELOW TO SUIT PROJECT.

C. Source Limitations: Obtain automatic transfer switch,
bypass/isolation switch and remote annunciators from a single
manufacturer who assumes responsibility for all components.

SEE EDITING INSTRUCTION NO. 3 IN THE EVALUATIONS ABOUT LABELING FOR
EMERGENCY SERVICE IN PARA BELOW.

> D. Listing and Labeling: Provide transfer switches specified in this
> Section that are listed and labeled for emergency service under
> UL 1008.
>
> 1\. The Terms \"Listed\" and \"Labeled\": As defined in the National
> Electrical Code, Article 100.

SUBPARA BELOW IS REQUIRED BY SOME FEDERAL AGENCIES.

> 2\. Listing and Labeling Agency Qualifications: A \"Nationally
> Recognized Testing Laboratory\" as defined in OSHA Regulation 1910.7.

DELETE NONAPPLICABLE STANDARDS BELOW.

> E. Comply with NFPA 70, "National Electrical Code," for components and
> installation.
>
> F. Comply with NFPA 110, "Standard for Emergency and Standby Power
> Systems."
>
> G. Comply with NEMA ICS 1, "General Standards for Industrial Control,
> "ICS2, "Industrial Control Devices, Controllers and Assemblies," and
> ICS 6, "Enclosures for Industrial Controls and Systems."
>
> H. UL Compliance: Comply with UL 1008, \"Automatic Transfer
> Switches,\" unless requirements of these Specifications are stricter.

[PART 2 - PRODUCTS]{.underline}

2.01 [MANUFACTURERS]{.underline}

> A. Manufacturers: Subject to compliance with requirements,
> manufacturers offering products that may be incorporated into the Work
> are the following:

RETAIN ABOVE FOR NONPROPRIETARY OR BELOW FOR SEMIPROPRIETARY
SPECIFICATION. REFER TO DIVISION 1 SECTION \"MATERIALS AND EQUIPMENT.\"

1\. Conventional Transfer Switches:

a\. Caterpillar, Inc.; Engine Division.

b\. Emerson Electric Co.; Automatic Switch Co. Subsidiary.

c\. Generac Corp.

d\. Kohler Co.; Generator Division.

e\. Onan Corp.; Electrical Products Division.

f\. Russelectric, Inc.

> g\. Zenith Controls, Inc.

2\. [Substitutions]{.underline}: only under provisions of Section
1600-S.

2.02 [GENERAL TRANSFER-SWITCH PRODUCT REQUIREMENTS]{.underline}

DELETE ITEMS IN PARAS BELOW IF NOT IN PROJECT. COORDINATE WITH DRAWINGS.

> A. Units Smaller than 600 A: Listed without derating for all classes
> and all mixtures of classes of loads, including 100 percent tungsten
> filament lamp or 100 percent inductive load. Units 600 amperes and
> larger have current ratings that apply to mixtures of loads including
> 30-percents-maximum tungstenfilement lamp load.

DELETE PARA BELOW IF CIRCUIT-BREAKER-TYPE TRANSFER SWITCHES WITH
INTEGRAL OVERCURRENT PROTECTION OR IF CLOSING AND WITHSTAND RATINGS ARE
INDICATED IN A SCHEDULE. INDICATE REQUIRED FAULT-CURRENT VALUES. SEE
EDITING INSTRUCTION NO. 4 IN THE EVALUATIONS.

> B. Tested Fault-Current Closing and Withstand Ratings: Adequate for
> duty imposed by protective devices at installation locations in
> Project under the fault conditions indicated based on testing
> according to UL 1008.
>
> 1\. Where External Circuit Breaker or Fuses Protect Transfer Switch:
> Products are listed for use with the actual devices providing the
> fault-current protection at each location for Project. Rated
> fault-current, withstand-duration times include the following:

DELETE DEVICES AND CURRENT RATINGS BELOW IF NOT USED TO PROTECT TRANSFER
SWITCHES IN PROJECT.

> a\. Units Protected by Molded-Case Circuit Breakers 150 A and Less:
> 1.5 cycles.
>
> b\. Units Protected by Molded-Case Circuit Breakers Larger than 150 A:
> 3 cycles.

REVISE BELOW IF CIRCUIT BREAKERS DO NOT HAVE INSTANTANEOUS-TRIP UNITS.
CONSULT MFRS.

> c\. Units Protected by Power and Insulated-Case Circuit Breakers: 10
> cycles.
>
> d\. Units Protected by Current-Limiting Fuses: 0.5 cycles (nominal).

DELETE BELOW IF THIS SECTION EXCLUDES AUTOMATIC TRANSFER SWITCHES BASED
ON MOLDED-CASE SWITCH PRODUCTS OR IF DESIGN DOES NOT INCLUDE
FAULT-CURRENT PROTECTION INTERNAL TO TRANSFER SWITCHES.

> 2\. Where Transfer Switch Includes Internal Protection: Rating of
> switch and trip unit combination exceeds indicated fault-current value
> at installation location.
>
> C. Annunciation and Control Interface Components: Devices at transfer
> switches for communicating with remote annunciators or annunciator and
> control panels have communications capability matched with the remote
> device.
>
> D. Solid-State Controls: Repetitive accuracy of all settings is plus
> or minus 2 percent or better over an operating temperature range of
> minus 20 deg C to 70 deg C.
>
> E. Resistance to Damage by Voltage Transients: Components meet or
> exceed voltage-surge withstand capability requirements when tested
> according to ANSI C37.90.1. Components meet or exceed voltage-impulse
> withstand test of NEMA ICS 1.
>
> F. Neutral Terminal: Where 2- or 3-pole switches are indicated,
> provide fully rated, solid, unswitched neutral terminal, unless
> otherwise indicated.

DELETE PARA BELOW UNLESS 4-POLE SWITCHES ARE INDICATED. SEE EDITING
INSTRUCTION NO. 5 IN THE EVALUATIONS.

> G. Four-Pole Switches: Where 4-pole switches are indicated, provide
> neutral switching.

DELETE PARA BELOW UNLESS REQUIRED FOR NONLINEAR LOADS. THIS REQUIREMENT
MAY RESULT IN SOME SUPPLIERS\' OVERSIZING CERTAIN SWITCHES TO PROVIDE AN
OVERSIZE NEUTRAL.

> H. Oversize Neutral: Ampacity and switch rating of neutral path
> through units indicated for oversize neutral shall be double the
> nominal rating of the circuit in which the switch is installed.

REVISE PARA BELOW TO REQUIRE NEMA 250, TYPE 12 DEFAULT ENCLOSURE IF
ENVIRONMENT IS GENERALLY DUSTY.

> I. Enclosures: General-purpose NEMA 250, Type 1, complying with
> NEMA ICS 6; UL 508, unless otherwise indicated.

DELETE PARA BELOW UNLESS ONE OR MORE SWITCHES ARE EXPOSED TO OUTDOOR
TEMPERATURE AND HUMIDITY CONDITIONS. COORDINATE WITH DRAWINGS.

> J. Heater: Equip switches exposed to outdoor temperature and humidity
> conditions, and other units indicated, with an internal heater.
> Provide thermostat within enclosure to control heater.
>
> K. Factory Wiring: Train and bundle factory wiring and label
> consistent with Shop Drawings, either by color code or by numbered or
> lettered wire and cable tape markers at terminations.
>
> 1\. Designated Terminals: Pressure type suitable for types and sizes
> of field wiring indicated.
>
> 2\. Power-Terminal Arrangement and Field-Wiring Space: Suitable for
> top, side, or bottom entrance of feeder conductors as indicated.
>
> 3\. Control Wiring: Equipped with lugs suitable for connection to
> terminal strips.
>
> L. Electrical Operation: Accomplish by a nonfused, momentarily
> energized solenoid or electric motor-operated mechanism, mechanically
> and electrically interlocked in both directions.
>
> M. Switch Characteristics: Designed for continuous-duty repetitive
> transfer of full-rated current between active power sources.

DELETE SUBPARA BELOW IF UNITS USING SWITCHING COMPONENTS DESIGNED FOR
MOLDED-CASE SWITCHES, INSULATED-CASE CIRCUIT BREAKERS, OR CONTACTORS ARE
PERMISSIBLE.

> 1\. Limitation: Switches using molded-case switch or insulated-case
> circuit-breaker components and switches using contactors not designed
> for continuous-duty repetitive switching between active power sources
> are not acceptable.
>
> 2\. Switch Action: Double throw; mechanically held in both directions.
>
> 3\. Switch Contacts: Silver composition for load current switching.
> Conventional automatic transfer-switch units rated 225 A and greater
> have separate arcing contacts.

2.03 [AUTOMATIC TRANSFER SWITCH (ATS)]{.underline}

> A. Comply with Level 1 equipment according to NFPA 110.

DELETE PARA BELOW EXCEPT FOR AUTOMATIC TRANSFER SWITCHES FOR FIRE PUMPS.

B. Comply with NFPA 20 for fire-pump transfer switches.

> C. Switching Arrangement: Double-throw type, incapable of pauses or
> intermediate position stops during normal functioning, unless
> otherwise indicated.

PARA BELOW IS OPTIONAL FEATURE WITH SOME MFRS.

> D. Manual Switch Operation: Manually operated under load, with the
> door closed, and with either or both sources energized. Transfer time
> is the same as for electrical operation. Control circuit automatically
> disconnects from electrical operator during manual operation.

DELETE PARA BELOW IF NOT REQUIRED FOR CONTROL TO MINIMIZE ELEVATOR
DISRUPTION OR FOR OTHER PURPOSES.

> E. Signal-before-Transfer Contacts: A set of normally open/normally
> closed dry contacts operates in advance of retransfer to normal
> source. Interval is adjustable from 1 to 30 seconds.

DELETE PARA BELOW UNLESS DIGITAL COMMUNICATIONS MAY BE USED FOR REMOTE
ANNUNCIATION OR REMOTE ANNUNCIATION AND CONTROL.

> F. Digital Communications Interface: Full-duplex RS 422 type, matched
> to capability of remote annunciator or annunciator and control panel.

DELETE PARA BELOW UNLESS TRANSFER SWITCHES BASED ON MOLDED-CASE SWITCH
COMPONENTS ARE PERMITTED.

> G. Transfer Switches Based on Molded-Case Switch Components: Comply
> with UL 489, UL 869, and NEMA AB 1.

THREE PARAS BELOW SPECIFY ALTERNATIVE AUTOMATIC TRANSFER-SWITCH OPTIONS
FOR HANDLING LARGE-MOTOR LOADS. DELETE 2 OR ALL PARAS. COORDINATE WITH
DRAWINGS. SEE EDITING INSTRUCTION NO. 6 IN THE EVALUATIONS.

> H. Automatic Transfer Switches for Large-Motor Loads: Where indicated,
> include factory-wired, internal, in-phase monitor relay. The relay
> controls transfer to occur when the 2 sources are synchronized in
> phase. The relay compares phase relationship and frequency difference
> between the normal and emergency sources and initiates transfer when
> both sources are within 15 electrical degrees, and only if transfer
> can be completed within 60 electrical degrees. In-phase transfer is
> initiated only if both sources are within 2 Hz of nominal frequency
> and 70 percent or more of nominal voltage.
>
> I. Automatic Transfer Switches for Large-Motor Loads: Where indicated,
> include factory-wired, internal, motor-control undervoltage and timing
> relays. Relays control designated starters to disconnect motors before
> transfer and reconnect them selectively at adjustable time intervals
> after transfer. Control connection to motor starters is through wiring
> external to the automatic transfer switch. Time delay for individual
> motor loads is adjustable between 1 and 60 seconds, and settings are
> as indicated. Relay contacts handling motor-control circuit inrush and
> seal currents are rated for actual currents to be encountered.
>
> J. Automatic Transfer Switches for Large-Motor Loads: Where indicated,
> operator has a programmed neutral position arranged to provide a
> midpoint between the 2 working switch positions, with an intentional,
> time-controlled pause at the midpoint during transfer. The pause is
> adjustable from 0.5 to 30 seconds minimum and factory set at 0.5
> second, unless otherwise indicated. Time delay occurs for both
> transfer directions.

2.04 [AUTOMATIC TRANSFER-SWITCH FEATURES]{.underline}

EDIT PARAS BELOW TO COORDINATE TERMINOLOGY FOR SOURCES, SUCH AS
\"NORMAL,\" \"PREFERRED,\" \"EMERGENCY,\" AND \"ALTERNATE,\" IF SUCH
NAMES ARE USED ELSEWHERE IN CONSTRUCTION DOCUMENTS. REVISE PICKUP,
DROPOUT, AND TIME-DELAY SETTINGS IN 4 PARAS BELOW TO SUIT APPLICATION.

> A. Voltage sensing for each phase of normal source. Pickup voltage is
> adjustable from 85 to 100 percent of nominal, and dropout voltage is
> adjustable from 75 to 98 percent of pickup value. Factory set for
> pickup at 90 percent and dropout at 85 percent.
>
> B. Time delay for override of normal-source voltage sensing delays
> transfer and engine start signals. Adjustable 0 to 6 seconds and
> factory set at 1 second.
>
> C. Voltage/Frequency Lockout Relay: Prevents premature transfer to an
> emergency generator set. Pickup voltage is adjustable from 85 to 100
> percent of nominal. Factory set to pickup at 90 percent. Pickup
> frequency is adjustable from 90 to 100 percent of nominal. Factory set
> to pickup at 95 percent.
>
> D. Time Delay for Retransfer to Normal Source: Adjustable from 0 to 30
> minutes and factory set at 10 minutes. Provides automatic defeat of
> the delay on loss of voltage or sustained undervoltage of the
> emergency source, provided normal supply has been restored.
>
> E. Test Switch: Simulates normal-source failure.
>
> F. Switch-Position Pilot Lights: Indicate source to which load is
> connected.
>
> G. Source-Available Indicating Lights: Supervise sources via the
> transfer-switch, normal- and emergency-source sensing circuits.
>
> 1\. Normal Power Supervision: Green light with nameplate engraved
> \"Normal Source Available.\"
>
> 2\. Emergency Power Supervision: Red light with nameplate engraved
> \"Emergency Source Available.\"
>
> H. Unassigned Auxiliary Contacts: 2 normally open single-pole,
> double-throw contacts for each switch position, rated 10 A at 240 V,
> ac.
>
> I. Transfer Override Switch: Overrides automatic retransfer control so
> automatic transfer switch will remain connected to emergency power
> source regardless of the condition of the normal source. A pilot light
> indicates override status.

DELETE REQUIREMENTS BELOW UNLESS NEEDED TO COORDINATE WITH
ENGINE-GENERATOR PLANT. DO NOT DUPLICATE CONTROL FEATURES FURNISHED WITH
GENERATOR SET. SEE EDITING INSTRUCTION NO. 7 IN THE EVALUATIONS.

> J. Engine Starting Contacts: 1 isolated, normally closed and 1
> isolated, normally open. Contacts are gold flashed or gold plated and
> rated 10 A at 32 V, dc minimum.

DELETE 1 OF 2 PARAS BELOW.

> K. Engine Shutdown Contacts: Instantaneous. Initiates shutdown
> sequence at remote engine-generator controls after retransfer of load
> to normal source.
>
> L. Engine Shutdown Contacts: Time delay adjustable from 0 to 5
> minutes; factory set at 5 minutes. Initiates shutdown at remote
> engine-generator controls after retransfer of load to normal source.
>
> M. Engine-Generator Exerciser: Solid-state, programmable-time switch
> starts engine-generator set and transfers load to it from normal
> source for a preset time, then retransfers and shuts down engine after
> a preset cool-down period. Initiates exercise cycle at preset
> intervals adjustable from 7 to 30 days. Running periods are adjustable
> from 10 to 30 minutes. Factory-set periods are for 7 days, 20 minutes,
> and 5 minutes, respectively. Exerciser features include the following:
>
> 1\. Exerciser Transfer Selector Switch: Permits selection between
> exercise with and without load transfer.
>
> 2\. Push-button programming control with digital display of settings.
>
> 3\. Integral battery operation of time switch when normal control
> power is not available.

2.05 [BYPASS/ISOLATION SWITCH]{.underline}

DELETE THIS ARTICLE IF BYPASS/ISOLATION SWITCH IS NOT ASSOCIATED WITH
AUTOMATIC TRANSFER-SWITCH UNITS. COORDINATE WITH DRAWINGS.

A. Comply with requirements for Level 1 equipment per NFPA 110.

> B. Description: Manual type, arranged to select and connect either
> source of power directly to the load, isolating the transfer switch
> from the load and from both power sources. Include the following
> features for each combined automatic transfer switch and
> bypass/isolation switch:
>
> 1\. Means to lock the bypass/isolation in the position that isolates
> the transfer switch, with an arrangement that permits complete
> electrical testing of the transfer switch while isolated. While
> isolated, interlocks prevent transfer-switch operation, except for
> testing or maintenance.
>
> 2\. Drawout Arrangement for Transfer Switch: Provides physical
> separation from live parts and accessibility for testing and
> maintenance operations.
>
> 3\. Bypass/Isolation Switch Current, Voltage, Closing, and
> Short-Circuit Withstand Ratings: Equal to or greater than those of the
> associated automatic transfer switch, and with the same phase
> arrangement and number of poles.
>
> 4\. Contact temperatures of bypass/isolation switches do not exceed
> those of automatic transfer-switch contacts when they are carrying
> rated load.
>
> 5\. Operability: Constructed so load bypass and transfer-switch
> isolation can be performed by 1 person in no more than 2 operations in
> 15 seconds or less.
>
> 6\. Legend: Manufacturer\'s standard legend for control labels and
> instruction signs give detailed operating instructions.
>
> 7\. Maintainability: Fabricate to allow convenient removal of major
> components from the front without removing other parts or main power
> conductors.
>
> C. Interconnection of Bypass/Isolation Switches with Automatic
> Transfer Switches: Factory-installed copper bus bars, plated at
> connection points and braced for the indicated available short-circuit
> current.

2.06 [REMOTE ANNUNCIATOR SYSTEM]{.underline}

> A. Functional Description: Remote annunciator panel annunciates
> conditions at indicated transfer switches. Annunciation includes the
> following:

DELETE INDICATIONS BELOW IF NOT REQUIRED.

> 1\. Sources available, as defined by actual pickup and dropout
> settings of transfer-switch controls.

2\. Switch position.

3\. Switch in test mode.

DELETE INDICATION BELOW IF PANEL IS HARD WIRED.

> 4\. Failure of digital communications link.
>
> B. Annunciator Panel: LED-lamp type with audible signal and silencing
> switch.
>
> 1\. Indicating Lights: Grouped for each transfer switch monitored.
>
> 2\. Label each group indicating the transfer switch it monitors,
> location of switch, and identity of load it serves.
>
> 3\. Mounting: Flush, modular, steel cabinet, unless otherwise
> indicated.
>
> 4\. Lamp Test: Push-to-test or lamp test switch on front panel.

2.07 [FINISHES]{.underline}

> A. Enclosures: Manufacturer\'s standard enamel over
> corrosion-resistant pretreatment and primer.

2.08 [SOURCE QUALITY CONTROL]{.underline}

> A. Factory Test Components, Assembled Switches, and Associated
> Equipment: Ensure proper operation. Check transfer time and voltage,
> frequency, and time-delay settings for compliance with specified
> requirements. Perform dielectric strength test complying with
> NEMA ICS 1.

[PART 3 - EXECUTION]{.underline}

3.01 [INSTALLATION]{.underline}

DELETE NONAPPLICABLE MOUNTING PARAS BELOW. COORDINATE WITH DRAWINGS.

> A. Floor Mounting of Switches: Level and anchor unit to floor.
>
> B. Annunciator and Control Panel Mounting: Flush in wall, unless
> otherwise indicated.

SELECT PARA BELOW TO REFLECT SECTION LOCATION OF ELECTRICAL
IDENTIFICATION REQUIREMENTS FOR PROJECT.

> C. Identify components according to Division 16 Section \"Electrical
> Identification.\"
>
> D. Identify components according to Division 16 Section \"Basic
> Electrical Materials and Methods.\"

3.02 [WIRING TO REMOTE COMPONENTS]{.underline}

DELETE THIS ARTICLE IF NO CONNECTIONS TO REMOTE ANNUNCIATORS, CONTROL
PANELS, OR MOTOR CONTROLS. COORDINATE WITH DRAWINGS.

> A. Match type and number of cables and conductors to control and
> communications requirements of transfer switches used. Increase
> raceway sizes at no additional cost to Owner if necessary to
> accommodate required wiring.

3.03 [CONNECTIONS]{.underline}

A. Ground equipment as indicated and required by National Electrical
Code.

1\. Tighten electrical connectors and terminals according to
manufacturer\'s published torque-tightening values. Where
manufacturer\'s torque values are not indicated, use those specified in
UL 486A and UL 486B.

3.04 [GROUNDING]{.underline}

A.  Make equipment connections for transfer switch units as indicated
    and as required by the NEC.

3.05 [FIELD QUALITY CONTROL]{.underline}

DELETE PARA ABOVE OR BELOW. RETAIN BELOW IF TESTING AGENCY SERVICES ARE
INCLUDED IN CONTRACT. DELETE BOTH PARAS IF CONTRACTOR WILL PERFORM FIELD
QUALITY-CONTROL TESTING.

> A. Testing Agency: Provide the services of a qualified independent
> testing agency to perform specified acceptance testing.
>
> B. Preliminary Tests: Perform electrical tests as recommended by
> manufacturer and as follows:
>
> 1\. Measure phase-to-phase and phase-to-ground insulation resistance
> levels with insulation resistance tester. Include external annunciator
> and control circuits. Use test voltages and procedure recommended by
> manufacturer. Meet manufacturer\'s specified minimum resistance.
>
> 2\. Check for electrical continuity of circuits and for short
> circuits.
>
> C. Field Tests: Give 7 days\' advance notice of tests and perform
> tests in presence of Owner\'s representative.

DELETE PARA BELOW IF AUTOMATIC TRANSFER SWITCH IS NOT ASSOCIATED WITH
GENERATOR SET.

D. Coordinate tests with tests of generator plant and run them
concurrently.

F. Tests: As recommended by manufacturer and as follows:

> 1\. Contact Resistance Test: Measure resistance of power contacts for
> automatic transfer switches, nonautomatic transfer switches, and
> bypass/isolation switches. Resolve values in excess of 500 micro-ohms
> and differences between adjacent poles exceeding 50 percent.

DELETE SUBPARA AND SUBORDINATE TEXT BELOW IF PROTECTIVE DEVICES FOR
CIRCUITS CONNECTED TO TRANSFER SWITCHES DO NOT INCLUDE GROUND-FAULT
PROTECTION.

> 2\. Ground-Fault Tests: Coordinate with testing of ground-fault
> protective devices to ensure sensors are properly selected and located
> to optimize ground-fault protection when power is being delivered from
> either source.

a\. Verify grounding points and sensor ratings and locations.

> b\. Apply simulated fault current at sensors and observe reaction of
> circuit-interrupting devices.
>
> 3\. Operational Tests: Demonstrate interlocking sequence and
> operational function for each switch at least 3 times.
>
> a\. Simulate power failures of normal source to automatic transfer
> switches and of emergency source with normal source available.
>
> b\. Simulate low phase-to-ground voltage for each phase of normal
> source to automatic transfer switches.

c\. Verify time-delay settings and pickup and dropout voltages.

F. Test Failures: Correct deficiencies identified by tests and prepare
for retest. Verify that equipment meets specified requirements.

> G. Reports: Maintain a written record of observations and tests.
> Report defective materials and workmanship and retest corrected items.
> Record adjustable relay settings and measured insulation and contact
> resistances and time delays. Attach a label or tag to each tested
> component indicating satisfactory completion of tests.

3.06 [DEMONSTRATION]{.underline}

DELETE PARA BELOW OR EDIT TO REQUIRE TRAINING THAT SUITS COMPLEXITY OF
PROJECT.

> A. Training: Engage a factory-authorized service representative to
> instruct Owner\'s personnel in the operation, maintenance, and
> adjustment of transfer switches and related equipment. Provide a
> minimum of 4 hours of instruction scheduled 7 days in advance.

END OF SECTION