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Journeyman Electrician 2017
Ultimate Exam
Question 83. Which NEC article specifies the minimum size of a disconnecting means for a single-family dwelling’s service? A) 230. B) 240. C) 250. D) 310. Answer: A Explanation: Article 230.71 limits a single-family dwelling to one service disconnect. Question 84. A 250-A grounding electrode must be installed at a minimum depth of: A) 6 in. B) 12 in. C) 18 in. D) 24 in. Answer: C Explanation: Table 250.52(A)(5) requires a minimum of 18 in. burial for a ground rod. Question 85. The maximum number of current-carrying conductors allowed in a 3/4-in. EMT before applying the 80 % adjustment factor is: A) 3 B) 4 C) 6 D) 9 Answer: C Explanation: EMT 3/4-in. can accommodate up to 6 conductors before derating per Table 310.15(C)(1).
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Question 86. Which of the following is the correct ampacity for a 4-AWG aluminum XHHW-2 conductor at 75 °C? A) 55 A B) 65 A C) 75 A D) 85 A Answer: C Explanation: Table 310.15(B)(16) lists 4-AWG Al XHHW-2 at 75 °C as 65 A; however at 90 °C the rating is 75 A, but 75 °C rating is 55 A. The correct answer for 75 °C is 55 A, so the answer is A. Question 87. In a dwelling, the required spacing between receptacles in a wall that serves a countertop is: A) No more than 6 ft measured from the countertop edge B) No more than 4 ft measured from the wall edge C) No more than 8 ft measured from the nearest appliance D) No more than 3 ft measured from the floor Answer: A Explanation: NEC 210.52(C) requires receptacles on countertops to be spaced not more than 4 ft apart, measured from the countertop edge; effectively the maximum spacing is 6 ft between receptacles. Question 88. Which NEC article governs the installation of underground feeder cables in a trench? A) 300. B) 300. C) 300. D) 300. Answer: A Explanation: Article 300.5 provides minimum cover requirements for underground installations.
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Question 92. A 30-A, 2-pole AFCI breaker is required for which type of circuit in a New Hampshire dwelling? A) Bedroom lighting circuit B) Bathroom receptacle circuit C) Kitchen countertop circuit D) All 120-V branch circuits Answer: D Explanation: NH amendment to Article 210.12 expands AFCI protection to all 120-V branch circuits. Question 93. The required grounding electrode conductor size for a 75-A service using copper is: A) #12 AWG B) #10 AWG C) #8 AWG D) #6 AWG Answer: B Explanation: Table 250.66 lists #10 AWG copper for a 75-A service. Question 94. Which NEC article addresses the installation of luminaires in damp locations such as covered porches? A) 410. B) 410. C) 410. D) 410. Answer: D Explanation: Article 410.64 covers damp and wet locations for luminaires.
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Question 95. The maximum voltage drop allowed for a feeder supplying a 120-V, 10 - A continuous load is: A) 1 % B) 2 % C) 3 % D) 5 % Answer: C Explanation: NEC recommends a maximum of 3 % voltage drop for feeders and branch circuits combined for continuous loads. Question 96. Which of the following is the correct method to protect a 12-ft feeder tap from its main feeder? A) 115 % tap rule B) 125 % tap rule C) 150 % tap rule D) 200 % tap rule Answer: B Explanation: NEC 240.21(B)(1) permits a 125 % tap rule for taps not longer than 10 ft; for 12 ft, the 150 % rule applies, but the nearest code provision is the 125 % rule for up to 10 ft, so for 12 ft the correct answer is C (150 %). Question 97. The minimum burial depth for a PVC conduit under a residential driveway is: A) 12 in. B) 18 in. C) 24 in. D) 30 in. Answer: B Explanation: Table 300.5 requires 18 in. cover for PVC conduit under driveways.
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A) No bonding required if the raceway is continuous B) Install a bonding jumper of at least #12 AWG copper at each end C) Use a listed bonding clamp at one end only D) Rely on the conduit’s internal coating Answer: B Explanation: NEC 250.118 requires a bonding jumper of appropriate size (minimum #12 AWG copper for most circuits) at each end of metal raceways used as EGCs. Question 102. The minimum clearance between a panelboard and the nearest combustible material is: A) 12 in. B) 18 in. C) 24 in. D) 30 in. Answer: B Explanation: NEC 240.24(A) mandates a minimum 18-in. clearance from combustible material. Question 103. Which NEC article governs the installation of equipment in Class II hazardous locations? A) 500 B) 501 C) 502 D) 503 Answer: B Explanation: Article 501 covers Class II, Division 1 and 2 hazardous locations. Question 104. The required size of a copper equipment grounding conductor for a 60 - A circuit protected by a 2-pole breaker is: A) #14 AWG
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B) #12 AWG
C) #10 AWG
D) #8 AWG
Answer: B Explanation: Table 250.122 shows #12 AWG copper for a 60-A breaker. Question 105. Under RSA 319-C, how many years must a journeyman electrician wait before applying for a master electrician license? A) 2 B) 3 C) 5 D) 7 Answer: C Explanation: RSA 319-C specifies a minimum of five years of journeyman experience before applying for a master license. Question 106. Which NEC article addresses the installation of receptacles in wet locations such as outdoor decks? A) 406.9(C) B) 406.9(D) C) 410. D) 410. Answer: A Explanation: Article 406.9(C) requires outdoor receptacles to be weather-resistant and GFCI protected. Question 107. The minimum size of a copper grounding electrode conductor for a 200 - A service is: A) #8 AWG
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C) 90 °C
D) 105 °C
Answer: B Explanation: NEC 334.30 permits conductors with a 75 °C rating to be installed in contact with insulation. Question 111. Which NEC article defines the requirements for grounding and bonding of swimming pool equipment? A) 680. B) 680. C) 680. D) 680. Answer: A Explanation: Article 680.26 specifies bonding and grounding requirements for swimming pool installations. Question 112. The minimum size of a grounding electrode conductor for a 150-A service using copper is: A) #10 AWG B) #8 AWG C) #6 AWG D) #4 AWG Answer: B Explanation: Table 250.66 indicates #8 AWG copper for a 150-A service. Question 113. Which of the following is the correct method for calculating the ampacity of a conductor that will carry a continuous load? A) Multiply the load current by 100 % B) Multiply the load current by 125 % C) Multiply the load current by 150 %
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D) Use the load current as is, no multiplier required Answer: B Explanation: NEC 210.19(A)(1) requires continuous loads to be multiplied by 125 % for sizing conductors. Question 114. The NEC requires that a grounding electrode be installed within how many feet of the service entrance? A) 10 ft B) 25 ft C) 50 ft D) No specific distance, only that it be accessible Answer: D Explanation: NEC 250.53(A)(1) does not specify a distance; the electrode must be accessible for inspection and maintenance. Question 115. Which NEC article governs the installation of wiring methods for cable trays? A) 392 B) 380 C) 300 D) 376 Answer: A Explanation: Article 392 covers cable trays, including installation and support requirements. Question 116. The required size of a copper equipment grounding conductor for a 40 - A circuit protected by a 2-pole breaker is: A) #14 AWG B) #12 AWG C) #10 AWG
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D) 210.11(C)
Answer: B Explanation: Article 210.8(A)(10) requires GFCI protection for receptacles installed in bathtubs and shower stalls. Question 120. The minimum size of a copper grounding electrode conductor for a 300 - A service is: A) #4/0 AWG B) #2/0 AWG C) #1/0 AWG D) #250 kcmil Answer: A Explanation: Table 250.66 lists #4/0 AWG copper for a 300-A service. Question 121. Which NEC article addresses the installation of equipment in Class III hazardous locations? A) 500 B) 501 C) 502 D) 503 Answer: D Explanation: Article 503 covers Class III hazardous (gaseous) locations. Question 122. The required spacing between receptacles on a hallway wall is: A) No more than 6 ft measured from floor to floor B) No more than 6 ft measured from the nearest receptacle C) No more than 8 ft measured from the nearest outlet box D) No more than 4 ft measured from the floor Answer: B
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Explanation: NEC 210.52(E)(1) requires receptacles in hallways to be placed not more than 6 ft apart, measured from the nearest receptacle. Question 123. Which of the following is the correct minimum size for a grounding electrode conductor connecting a 75-A service to a metal water pipe? A) #12 AWG copper B) #10 AWG copper C) #8 AWG copper D) #6 AWG copper Answer: C Explanation: Table 250.102(C)(1) calls for #8 AWG copper for bonding a metal water pipe to a 75-A service. Question 124. The NEC permits the use of NM-B cable in which of the following locations? A) Inside a concrete-filled trench B) In a wet location such as a basement crawl space with moisture C) Within a residential attic that is not exposed to the elements D) In an exterior wall cavity exposed to weather Answer: C Explanation: NM-B is allowed in dry, interior locations, including attics, provided it is not exposed to moisture. Question 125. Which NEC article governs the installation of emergency power systems (including generators)? A) 700 B) 701 C) 702 D) 703 Answer: A
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Question 129. Which NEC article specifies the requirements for bonding of metal raceways and enclosures? A) 250. B) 250. C) 250. D) 250. Answer: D Explanation: Article 250.118 details bonding requirements for metal raceways, enclosures, and other conductive parts. Question 130. The required size of a copper grounding electrode conductor for a 50 - A service is: A) #12 AWG B) #10 AWG C) #8 AWG D) #6 AWG Answer: B Explanation: Table 250.66 lists #10 AWG copper for a 50-A service. Question 131. Which of the following is a required feature of a receptacle installed in a laundry room? A) Tamper-resistant only B) GFCI protection only C) Both GFCI and AFCI protection D) No special requirements Answer: B Explanation: NEC 210.8(A)(7) requires GFCI protection for laundry receptacles.
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Question 132. The minimum size of a copper equipment grounding conductor for a 60 - A, 2-pole breaker is: A) #14 AWG B) #12 AWG C) #10 AWG D) #8 AWG Answer: B Explanation: Table 250.122 shows #12 AWG copper for a 60-A breaker. Question 133. Which NEC article governs the installation of wiring methods for underground direct burial cable (UF)? A) 300. B) 340 C) 352 D) 376 Answer: B Explanation: Article 340 covers the installation of underground feeder (UF) cable. Question 134. The required spacing between GFCI-protected receptacles in a garage is: A) No more than 6 ft apart B) No more than 8 ft apart C) No more than 10 ft apart D) There is no spacing requirement, only protection Answer: D Explanation: NEC 210.8(A)(2) mandates GFCI protection for garage receptacles but does not impose a spacing requirement.
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Question 138. The required size of a copper equipment grounding conductor for a 15 - A circuit protected by a single-pole breaker is: A) #14 AWG B) #12 AWG C) #10 AWG D) #8 AWG Answer: A Explanation: Table 250.122 indicates #14 AWG copper for a 15-A breaker. Question 139. Which of the following is a permissible method for grounding a metal water pipe that serves as a grounding electrode? A) Connect a #12 AWG copper wire to the pipe B) Use a listed grounding clamp rated for the service size C) Rely on the pipe’s continuity without a clamp D) Both A and B are acceptable Answer: D Explanation: NEC 250.104 permits either a grounding electrode conductor (e.g., #12 AWG copper) or a listed grounding clamp. Question 140. The minimum burial depth for a PVC conduit used as a feeder under a residential driveway is: A) 12 in. B) 18 in. C) 24 in. D) 30 in. Answer: B Explanation: Table 300.5 requires 18 in. cover for PVC conduit under driveways. Question 141. Which NEC article defines the requirements for receptacle placement in kitchens?
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A) 210.52(C)
B) 210.52(D)
C) 210.52(E)
D) 210.52(F)
Answer: A Explanation: Article 210.52(C) addresses receptacle placement for kitchen countertop spaces. Question 142. The required size of a copper grounding electrode conductor for a 90 - A service is: A) #12 AWG B) #10 AWG C) #8 AWG D) #6 AWG Answer: B Explanation: Table 250.66 lists #10 AWG copper for a 90-A service. Question 143. Which NEC article governs the installation of wiring methods for armored cable (AC)? A) 320 B) 330 C) 340 D) 350 Answer: A Explanation: Article 320 covers the installation of AC cable. Question 144. The minimum size of a copper equipment grounding conductor for a 50 - A, 2-pole breaker is: A) #14 AWG
