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Journeyman Electrician Ultimate Exam
Question 1. Which NEC article defines the term “accessible” as used in residential wiring? A) Article 100 B) Article 110 C ) Article 210 D) Article 250 Answer: A Explanation: Article 100 provides definitions for terminology, including “accessible”. Question 2. Ohm’s Law states that V =? A) I ÷ R B) I × R C) R ÷ I D) V ÷ I Answer: B Explanation: Voltage equals current multiplied by resistance (V = I·R). Question 3. A 20-A branch circuit supplies a 120-V receptacle. What is the maximum continuous load allowed on that circuit? A) 16 A B) 18 A C) 20 A D) 24 A Answer: A Explanation: Continuous loads may not exceed 80 % of the breaker rating (20 A × 0.8 = 16 A). Question 4. Which of the following is the correct voltage-drop limit for a 120-V feeder supplying a single-family dwelling? A) 2 %
Journeyman Electrician Ultimate Exam
B) 3 %
C) 5 %
D) 10 %
Answer: B Explanation: NEC recommends a maximum of 3 % voltage drop for feeders and branch circuits. Question 5. In a series circuit, the total resistance is the sum of the individual resistances. True or false? A) True B) False Answer: A Explanation: Series resistances add directly. Question 6. What is the minimum size copper grounding electrode conductor for a 100-A service? A) #10 AWG B) #8 AWG C) #6 AWG D) #4 AWG Answer: B Explanation: Table 250.66 requires #8 AWG copper for a 100-A service. Question 7. Which of the following devices provides protection against both ground-fault and arc-fault currents? A) GFCI B) AFCI C) Dual-function GFCI/AFCI D) Circuit breaker only Answer: C
Journeyman Electrician Ultimate Exam
Question 11. Which type of cable is permitted for interior residential wiring and has a non-metallic sheath? A) Type AC B) Type MC C) Type NM-B D) Type SE Answer: C Explanation: NM-B (Romex) is a non-metallic sheathed cable allowed in residences. Question 12. The grounding electrode system for a new home includes a 5-ft copper rod driven 8 ft into the earth. What is the minimum diameter of this rod? A) ¼ in. B) ⅜ in. C) ½ in. D) ¾ in. Answer: B Explanation: NEC 250.52(A)(5) requires a minimum of ⅜-in. copper rod. Question 13. Under Utah NEC amendments, what is the required AFCI protection for bedroom receptacle circuits? A) None required B) Only GFCI required C) AFCI required for all outlets D) AFCI required only for lighting Answer: C Explanation: Utah has adopted the 2023 NEC requirement for AFCI protection on bedroom outlets. Question 14. Which of the following is the correct ampacity of a 3-conductor 75 °C #6 AWG copper THHN in a 30 °C ambient temperature? A) 45 A
Journeyman Electrician Ultimate Exam
B) 55 A
C) 65 A
D) 75 A
Answer: C Explanation: Table 310.16 lists 65 A for #6 AWG copper at 75 °C. Question 15. A 30-A two-pole breaker supplies a 240-V water heater. What is the minimum size of the grounding conductor required? A) #12 AWG copper B) #10 AWG copper C) #8 AWG copper D) #6 AWG copper Answer: B Explanation: Table 250.122 requires #10 AWG copper for a 30-A circuit. Question 16. What is the required minimum height for a receptacle outlet in a bathroom according to NEC? A) 12 in. above the floor B) 15 in. above the floor C) 18 in. above the floor D) No specific height, as long as it is accessible Answer: D Explanation: NEC does not prescribe a specific height; receptacles must be readily accessible. Question 17. Which article governs the installation of wiring methods for outdoor lighting fixtures? A) 210. B) 410. C) 430.
Journeyman Electrician Ultimate Exam
Explanation: Metal conduit can serve as a grounding electrode conductor when installed per 250.118. Question 21. For a 120-V, 20-A receptacle circuit, what is the minimum size of the equipment grounding conductor if copper THHN is used? A) #14 AWG B) #12 AWG C) #10 AWG D) #8 AWG Answer: B Explanation: Table 250.122 requires #12 AWG copper for a 20-A circuit. Question 22. Which NEC section requires that all outdoor receptacles be GFCI protected? A) 210.8(A)(3) B) 210.8(A)(2) C) 210.8(B)(1) D) 210.8(C)(1) Answer: A Explanation: Article 210.8(A)(3) mandates GFCI protection for outdoor receptacles. Question 23. A 15-A, 120-V kitchen countertop receptacle must be located no more than how many inches from the edge of the countertop? A) 12 in. B) 18 in. C) 24 in. D) 30 in. Answer: B Explanation: NEC 210.52(C)(1) requires receptacles to be within 24 in. of any countertop edge, with no point farther than 12 in. from the edge; the 18-in. spacing ensures compliance.
Journeyman Electrician Ultimate Exam
Question 24. Which of the following devices must be installed on a garage branch circuit that supplies a 120-V receptacle? A) AFCI only B) GFCI only C) Both AFCI and GFCI D) Neither, unless required by local amendment Answer: B Explanation: NEC 210.8(A)(2) requires GFCI protection for garage receptacles. Question 25. The minimum clearance required in front of a service disconnecting means in a residential dwelling is: A) 3 ft B) 30 in. C) 36 in. D) 42 in. Answer: B Explanation: NEC 230.71 requires a minimum of 30 in. of working space in front of the service disconnect. Question 26. When using NM-B cable in a conduit, what is the maximum number of cables allowed in a ¾-in. PVC conduit? A) 2 B) 3 C) 4 D) 5 Answer: B Explanation: NEC limits NM-B in conduit to a maximum of 3 cables to avoid overheating.
Journeyman Electrician Ultimate Exam
B) Two-pole 20-A breaker C) 30-A fuse only D) No overcurrent device required Answer: B Explanation: A two-pole breaker protects both ungrounded conductors of a 240-V circuit. Question 31. For a residential feeder supplying a sub-panel, the neutral must be: A) Isolated from ground at the sub-panel only B) Bonded to ground at both the service and sub-panel C) Never bonded to ground D) Bonded only at the feeder panel Answer: A Explanation: The neutral is bonded to ground at the service entrance only; at sub-panels it must remain isolated. Question 32. Which of the following is the correct minimum size for a copper grounding electrode conductor for a 400-A service? A) #6 AWG B) #4 AWG C) #2 AWG D) #1/0 AWG Answer: D Explanation: Table 250.66 requires #1/0 AWG copper for a 400-A service. Question 33. In Utah, what is the required continuing education credit for a journeyman electrician every two years? A) 8 hours B) 12 hours
Journeyman Electrician Ultimate Exam
C) 16 hours D) 20 hours Answer: C Explanation: Utah DOPL rules mandate 16 hours of continuing education per renewal cycle. Question 34. Which NEC article addresses the installation of receptacles in damp or wet locations? A) 210.8(A)(5) B) 210.8(B)(3) C) 300.5(A) D) 250.68(A) Answer: A Explanation: Article 210.8(A)(5) requires GFCI protection for receptacles in damp or wet locations. Question 35. The minimum height for a light switch in a residential dwelling is: A) 36 in. above finished floor B) 42 in. above finished floor C) No specific height required, only accessibility D) 48 in. above finished floor Answer: C Explanation: NEC does not prescribe a specific height; switches must be readily accessible. Question 36. When installing a new circuit for a 120-V, 15-A bathroom vanity light, which protection is required? A) AFCI only B) GFCI only C) Both AFCI and GFCI D) No special protection required
Journeyman Electrician Ultimate Exam
Answer: D Explanation: NEC does not set a length limit; voltage-drop should be evaluated for any length where it may be a concern. Question 40. Which of the following is the correct size of a THHN copper conductor to be used as a feeder for a 30-A sub-panel? A) #12 AWG B) #10 AWG C) #8 AWG D) #6 AWG Answer: B Explanation: #10 AWG copper THHN is rated for 30 A at 75 °C. Question 41. For a 30-A, 240-V AC motor, what is the minimum size of the equipment grounding conductor? A) #12 AWG copper B) #10 AWG copper C) #8 AWG copper D) #6 AWG copper Answer: B Explanation: Table 250.122 requires #10 AWG copper for a 30-A circuit. Question 42. Which NEC article specifies the required spacing of receptacles in a hallway? A) 210.52(E)(1) B) 210.70(B) C) 210.21(B)(3) D) 210.8(A)(2) Answer: A Explanation: Article 210.52(E)(1) addresses receptacle spacing in hallways.
Journeyman Electrician Ultimate Exam
Question 43. The minimum size of a copper grounding electrode conductor for a concrete-encased electrode (Ufer) that is 20 ft long is: A) #4 AWG B) #6 AWG C) #8 AWG D) #10 AWG Answer: C Explanation: Table 250.66 permits #8 AWG copper for a Ufer electrode of at least 20 ft. Question 44. Which of the following devices is required on a 20-A, 120-V bathroom receptacle? A) AFCI only B) GFCI only C) Both AFCI and GFCI D) No device required Answer: B Explanation: NEC 210.8(A)(1) mandates GFCI protection for bathroom receptacles. Question 45. A 12-AWG copper conductor is installed in a conduit with an ambient temperature of 40 °C. What is the appropriate ampacity after applying the temperature correction factor? A) 20 A B) 25 A C) 30 A D) 35 A Answer: B Explanation: Table 310.15(B)(2)(a) gives a 0.88 factor at 40 °C; 30 A × 0.88 ≈ 26 A, rounded to the next lower standard rating of 25 A.
Journeyman Electrician Ultimate Exam
B) 36 in. C) 42 in. D) 48 in. Answer: B Explanation: NEC 110.26(A) requires a minimum of 36 in. of clear working space in front of equipment. Question 50. Which article specifies the requirements for receptacles in laundry rooms? A) 210.52(F) B) 210.8(A)(10) C) 210.11(C)(2) D) 210.52(E) Answer: A Explanation: Article 210.52(F) addresses receptacle placement in laundry areas. Question 51. When installing a 120-V, 20-A circuit for a dedicated garage door opener, which protection is mandatory? A) AFCI only B) GFCI only C) Both AFCI and GFCI D) Neither, unless local amendment requires it Answer: B Explanation: NEC 210.8(A)(2) requires GFCI protection for garage receptacles; door opener circuits are considered receptacle circuits. Question 52. The maximum number of 12-AWG conductors allowed in a ¾-in. EMT conduit is: A) 8 B) 9 C) 10
Journeyman Electrician Ultimate Exam
D) 12
Answer: C Explanation: Annex C Table 1 lists 10 conductors for 12-AWG in ¾-in. EMT. Question 53. Which of the following is the correct minimum size for a copper grounding electrode conductor for a 200-A service? A) #8 AWG B) #6 AWG C) #4 AWG D) #2 AWG Answer: C Explanation: Table 250.66 requires #4 AWG copper for a 200-A service. Question 54. A 15-A, 120-V kitchen countertop receptacle is supplied by a 20-A circuit. Is this acceptable? A) Yes, because the receptacle rating is lower than the breaker rating B) No, receptacle must match breaker size exactly C) Yes, but only if GFCI protected D) No, receptacle must be rated at least 20 A Answer: A Explanation: Receptacles may be rated lower than the circuit breaker as long as the load does not exceed the receptacle rating. Question 55. Which NEC article deals with the installation of electric vehicle (EV) charging equipment in dwellings? A) 210.8(A)(11) B) 625. C) 690. D) 440. Answer: B
Journeyman Electrician Ultimate Exam
Question 59. The NEC requires a minimum of how many receptacles in a bedroom of any size? A) One B) Two C) Three D) No minimum, only spacing requirements apply Answer: D Explanation: NEC does not set a minimum number of receptacles in a bedroom; it only addresses spacing and protection. Question 60. Which article specifies the requirements for grounding of swimming pool equipment? A) 680. B) 250. C) 210.8(A)(12) D) 590. Answer: A Explanation: Article 680 covers swimming pools, including grounding and bonding. Question 61. For a 120-V, 15-A lighting circuit, what is the maximum number of 15 - A receptacles allowed on the same circuit? A) 1 B) 6 C) 12 D) No specific limit, as long as total load does not exceed 80 % of the breaker rating Answer: D Explanation: NEC limits total load, not the number of receptacles. Question 62. Which of the following is the correct minimum size for a copper grounding electrode conductor for a 100-ft concrete-encased electrode? A) #8 AWG
Journeyman Electrician Ultimate Exam
B) #6 AWG
C) #4 AWG
D) #2 AWG
Answer: B Explanation: Table 250.66 requires #6 AWG copper for a concrete-encased electrode of at least 20 ft; longer electrodes may use #8 AWG, but #6 AWG is the minimum for 100 ft. Question 63. In Utah, what is the required minimum number of continuing education hours for a master electrician renewal? A) 12 hours B) 16 hours C) 24 hours D) 30 hours Answer: C Explanation: Utah DOPL requires 24 hours of continuing education for master electricians every two years. Question 64. Which NEC article governs the installation of receptacles in basements? A) 210.52(D) B) 210.8(A)(5) C) 210.8(A)(6) D) 210.70(A) Answer: C Explanation: Article 210.8(A)(6) requires GFCI protection for receptacles in basements. Question 65. The maximum allowable voltage drop for a feeder supplying a 120 - V lighting load is: A) 2 %
