none of the answers provided Dusttight enclosures are designed to prevent dust from entering ______. except under extreme conditions specified conditions in outdoor environments in hazardous environments The NEC’s definition of electric signs does not include those that are ______. illuminated portable non-illuminated none of the answers provided A Field Evaluation Body (FEB) performs field evaluations of ______. electrical equipment wire coating hazardous locations inspector compliance Equipment that has been labeled by a Field Evaluation Body indicating that it was found to comply with requirements is called ______. suitable non-hazardous dusttight field labeled A photovoltaic system converts solar energy into electrical energy ______. that is useless for any practical applications with the use of the wind for connection to a utilization load only for self-contained systems A process seal for hazardous locations is a seal between electrical systems and ______. the surrounding air flammable or combustible fluids water none of the answers provided A raceway may be nonmetallic. True A receptacle is a ______ installed at the outlet for the connection of an attachment plug. protector bare conductor termination watertight seal contact device The NEC’s definition of a structure includes ______. a free-standing switchboard a light pole an electric sign none of the answers provided A ______ is an assemblage of equipment through which electric energy is passed for the purpose of distribution. photovoltaic cell fuse substation conductor Quiz 2 Product testing, evaluation and listing may be performed by ______. recognized qualified electrical testing laboratories an inspector in the field any licensed electrician all of the answers provided The NEC has specified that all conductors are to be ______ or ______ unless otherwise specified. sealed, protected copper, aluminum stapled titanium, steel Equipment intended to interrupt current at fault levels shall have an interrupting rating at nominal circuit voltage ______ the current that is available at the line terminals of the equipment. greater than less than at equal to suitable for Equipment identified ______, such as “dry locations,” “indoor use only” or “damp locations” shall be protected against damage from the weather during construction. only for outdoor use as refurbished with a field label only for indoor use
must clear railroad tracks by at least 24-1/2 feet must cross railroad tracks underground Metal support structures supporting overhead service conductors passing over a roof must be bonded to ______. the grounded overhead service conductor the side of the building an additional metal structure that touches the ground the rooftop For an installation with a 200A, continuous load with 3 current-carrying copper conductors with insulation rated at 75C, what size service-entrance conductors are required? 4/0 AWG 250 AWG 300 AWG 350 AWG For an installation with a 240A, 3-phase, continuous load with 3 current-carrying copper conductors with insulation rated at 75C, what size service-entrance conductors are required? 250 AWG 300 AWG 350 AWG 400 AWG Cables permitted for use in cable trays ______. must be listed for use in cable trays must be field labeled with “CT” must be marked by the manufacturer with “CT” all of the answers provided Raceways enclosing service-entrance conductors must be listed or approved as rainproof. True False The 2017 NEC requires that service heads on service-entrance cables are located ______ the service drop. below the point of attachment of above the point of attachment of above the roofline of within a gooseneck at A socket does not need to be listed when ______. it is rated for the voltage and ampacity of the service it’s an individual socket it is to be field labeled it’s under the exclusive control of an electric utility The NEC does not allow ______ to be connected to the supply side of a service disconnect. solar PV systems batteries HVAC equipment wind electric systems Where fuses are used as the service overcurrent device, the ______ shall be located ahead of the supply side of the fuses. meter socket disconnecting means attach raceway Quiz 5 According to Table 240.6(A), ______ is a standard ampere rating for a fuse. 45 55 65 75 If we calculate the minimum ampere rating for a fuse of 180 amps, what standard ampere rating fuse should we select? 175 amps 200 amps 210 amps 300 amps If a tool is required to open an industrial control it is considered to be ______. not readily accessible not suitable for use readily accessible suitable for use with AHJ approval