Journeyman Electrician #4 Exam Questions and Answers

Journeyman Electrician #4 Exam Questions and Answers Where conduits enter a floor-standing switchboard or panelboard at the bottom, the conduits including their end fittings, shall not rise more than _____ above the bottom of the enclosure. a) 6 inches b) 4 inches c) 2 inches d) 3 inches -Answer-D: 3 inches Ref: 408.5 When installed on the service of a building or structure, a type 2 SPD (TVSS) shall be connected _____. a)on the line side of the service disconnect overcurrent device b) on the load side of the service disconnect overcurrent device c) on the meter housing d) at the final overcurrent device -Answer-B: on the load side of the service disconnect overcurrent device Ref: 285.24(A) A detached garage supplied from a dwelling with a three-wire feeder of size 4/0 AWG aluminum USE cable with a 200-ampere rated circuit breaker for overcurrent protection requires a MINIMUM size copper grounding electrode to a concrete encased electrode of _____ AWG. a) 8 b) 6 c) 4 d) 2 -Answer-C: 4 Ref: 250.52(A)(3) When a raceway is run from the interior to the exterior of a building, the raceway shall _____. a) be rigid metal conduit (RMC) b) be rigid polyvinyl chloride conduit (PVC) c) be sealed with an approved material d) have an explosion-proof seal -Answer-C: be sealed with an approved material Ref: 300.7(A) A disconnecting means shall be provided on the supply side of all fuses in circuits having a voltage of at LEAST _____ volts to ground. a) 120 b) 250 c) 150 d) 277 -Answer-C: 150 Ref: 240.40 Given: an 80-ampere, 240-volt, single-phase, load is located 200 feet from the supply panelboard and is supplied with size 3 AWG copper conductors with THHN/THWN insulation. What is the approximate voltage-drop on this circuit? (K = 12.9) a) 6.0 volts b) 4.0 volts c) 9.2 volts d) 7.84 volts -Answer-D: 7.84 volts Ref: Chpt. 9, Tbl. 8 Sol: VD = 2KID / CM VD = (2 x 12.9 x 80 amps x 200') / 52,620 CM = 7.84 volts Enclosures in a Class I, Division 1, location containing components that have arcing devices must have an approved seal located within _____ of each conduit run entering or leaving such enclosures. a) 12 inches b) 18 inches c) 24 inches d) 30 inches -Answer-B: 18 inches