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Journeyman
Electrician Test
Questions &
Answers
If you must guess on an exam question, most of the time the answer is... - ANSWER B or C As a general rule, an insulated equipment grounding conductor of a branch circuit shall be identified by which color? - ANSWER Green An emergency electrical disconnect provided for a gasoline motor. fuel dispensing pump must be located not more than _______ from the fuel dispensing device it serves. - ANSWER 100 feet A building or other structure served shall be supplied by only one service except one where the capacity requirements are in excess of _________. - ANSWER 2000 amps at a supply voltage of 1000 volts or less
Disregarding exceptions, the minimum size overhead service-drop conductors shall be _______ AWG copper. - ANSWER 8 gauge Where multiple driven ground rods are installed at a service, they shall be spaced not less than ______ feet apart. - ANSWER 6 feet Where a one-family dwelling has a 200 amp, 120/240 volt, single phase main service panel and is supplied with size 2/0 gauge THW copper ungrounded line service entrance conductors in rigid metal conduit, the minimum required size of the bonding jumper for this service entrance conduit is _____ copper. - ANSWER 4 AWG A disconnect switch enclosure installed in a Class 2, division 2, hazardous location in an industrial establishment shall be ______. - ANSWER Dust-tight The interior of enclosures or raceways installed underground shall be considered to be a _____ location.
- ANSWER Wet Determine the ampacity of four, size 1/0 gauge THW copper current carrying conductors installed in a common raceway with an ambient temperature of 86 degrees Fahrenheit. - ANSWER 120 Amps The NEC defines a continuous load to be a load where the maximum current on the circuit is expected to continue for at least _____ hours or more. - ANSWER Three Determine the maximum number of size 14 AWG THHN conductors permitted to be installed in a trade size 3/8 inch flexible metal conduit FMC that contains a bare size 14 AWG grounding conductor, when the FMC has external fittings. - ANSWER Four Which of the listed conduits does the NEC permit to enclose conductors supplying wet niche underwater pool luminaries? - ANSWER Schedule 40 rigid PVC conduit Underground wiring is not permitted under a permanently installed swimming pool or within _____ distance of the pool, unless the wiring is supplying the associated pool equipment. - ANSWER 5 feet What types of batteries are not permitted for use as a source of power for emergency systems? - ANSWER Automotive
In general, for other than dwelling units, all 15 and 20 amp, 125 volt, single phase receptacles installed on rooftops must be provided with ______. - ANSWER GFCI protection only Where the motor controller also serves as a disconnecting means, it shall open all ______ conductors to the motor. - ANSWER Ungrounded Before demand factors are taken into consideration for commercial occupancies, general purpose receptacle loads are to be computed at not less than _____ per duplex or single receptacle outlet mounted on one yoke. - ANSWER 180 VA Conductors with ______ insulation have a greater ampacity when used in a dry location compared to when used in a wet location. - ANSWER THHW Where a submersible pump is housed in a metal well casing, the well casing shall be _____ the pump circuit equipment grounding conductor? - ANSWER Connected to Determine the minimum size THW copper branch circuit conductors the NEC requires to supply a 3 phase, continuous duty, as motor that draws 70 amps per phase. Consider all terminations are rated for 75 degrees celcius. - ANSWER 3 AWG Given: You have determined a conductor has a computed ampacity of 75 amps. What is the maximum standard amp rating of the overcurrent protection device the NEC permits to protect this circuit here this is not a motor circuit or part of a multi-outlet branch circuit supplying more than one receptical? - ANSWER 80 Amps A 208 volt, 3 phase, 50 horsepower, squirrel cage, continuous duty, ac motor has a full load running current rating of _____. - ANSWER 143 Amps What is the maximum distance that a disconnect switch is permitted to be located from the operator's station for a portable carnival ride? - ANSWER 6 feet Determine the minimum trade size electrical metallic tubing (EMT) required to enclose eight, 6 guage AWG copper conductors with THHW insulation, when installed in a 50 foot conduit run. - ANSWER 1. inch
Where exceptions are not applicable, when a feeder supplies a continuous load of 240 amps, the overcurrent protection device protecting this feeder circuit shall have a rating of at least _______. - ANSWER 250 amps Liquid tight flexible metal conduit LFMC shall be securely fastened in place within _____ of each box or other conduit termination. - ANSWER 12 inches When a pull box or junction box contains conductors of size 4 AWG and larger and a straight pull of the conductors is to be made, the length of the box shall not be less than _____ times the trade diameter of the largest conduit entering the pull box or junction box. - ANSWER Eight Conduit nipples not over 24 inches long may be filled to a maximum of _____ of their cross-sectional area. - ANSWER 60 percent In a health care facility, low voltage electrical equipment that is likely to become energized that is frequently in contact with the bodies of patients, shall operate at a voltage of _____ or less if the equipment is not approved as intrinsically safe, double insulated or moisture resistant. - ANSWER 10 volts Information technology equipment shall be permitted to be connected to a branch circuit by a listed power-supply cord having a length not to exceed: - ANSWER 15 feet When ambient temperature is not a factor, a size 8 AWG single copper conductor with type FEPB insulation, installed in free air, has an ampacity of ______. - ANSWER 80 Amps For the purpose of determining conductor fill in a device box, a three way toggle switch is counted as equal to _____ conductors, based on the largest conductor connected to the switch. - ANSWER Two When determining the required ampacity of the branch circuit conductors to supply a 3 phase, continuous duty AC motor, current values given on _____ shall be used. - ANSWER Table 430.250 of the NEC
