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**Question 1. What does NEC Article 100 define as the term “grounded conductor”? ** A) The conductor that is intentionally connected to earth B) The neutral conductor of a system C) Any uninsulated metal raceway D) The equipment grounding conductor Answer: B Explanation: The grounded conductor is the neutral that is bonded to the grounding electrode system. Question 2. According to Ohm’s Law, if a circuit has 120 V and 2 A, what is its resistance? A) 60 Ω B) 240 Ω C) 0.016 Ω D) 2 Ω Answer: A Explanation: Resistance = Voltage / Current = 120 V / 2 A = 60 Ω. Question 3. In a series circuit, the total voltage is the sum of: A) Individual currents B) Individual resistances C) Individual voltages D) Individual power factors Answer: C Explanation: Series circuits add voltages across each element.
Journeyman Electrician Ultimate
Exam
Question 4. Which NEC article governs the identification of circuit breakers on a panelboard? A) Article 210 B) Article 408 C) Article 110 D) Article 300 Answer: B Explanation: Article 408 requires circuit breakers to be legibly identified. Question 5. When reading a one-line diagram, a solid line with a circle at each end represents: A) A transformer B) A service disconnect C) A conduit run D) A grounding electrode Answer: B Explanation: The symbol denotes a service disconnect or main breaker. Question 6. The required clearance between a service drop and a building opening is: A) 3 ft B) 6 ft C) 10 ft D) 12 ft Answer: C Explanation: NEC 230.24 requires a minimum 10-ft clearance. Question 7. A 100-amp service entrance conductor must be sized at least: A) 2 AWG copper
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D) No limit if voltage drop is acceptable Answer: D Explanation: NEC does not set a fixed length; voltage drop calculations determine practicality. Question 11. For a continuous load, the branch-circuit conductor must be sized at least: A) 100 % of the load B) 125 % of the load C) 150 % of the load D) 175 % of the load Answer: B Explanation: NEC 210.20(A) requires conductors to be rated at 125 % of continuous loads. Question 12. The grounding electrode conductor for a residential building is typically: A) #4 AWG copper B) #6 AWG copper C) #8 AWG copper D) #10 AWG copper Answer: B Explanation: NEC 250.68(A) generally calls for #6 AWG copper for a 100-A service. Question 13. A concrete-encased grounding electrode (Ufer) must be at least: A) 12 in long B) 20 ft long C) 30 ft long D) 50 ft long
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Answer: C Explanation: NEC 250.52(A)(3) requires at least 20 ft of #4 AWG copper or 30 ft of #4 rebar. Question 14. The size of the equipment grounding conductor for a 20-amp circuit protected by a 20-amp breaker is: A) #12 AWG copper B) #14 AWG copper C) #10 AWG copper D) #8 AWG copper Answer: B Explanation: Table 250.122 lists #14 AWG copper for 15- and 20-amp overcurrent devices. Question 15. Which of the following is NOT a permissible method for bonding a metal conduit system? A) Rigid metal conduit (RMC) couplings B) Bonding jumpers in each box C) Using the conduit as the grounding electrode D) Bonding the conduit to the grounding electrode conductor Answer: C Explanation: The conduit cannot serve as the grounding electrode; it must be bonded to one. Question 16. The standard ampere rating for a Class C circuit breaker used on a 120/240-V single-phase system is: A) 15 A B) 20 A C) 30 A D) 40 A
Journeyman Electrician Ultimate
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Explanation: Table 310.15(B)(3)(a) shows 80 % for 4-6 conductors. Question 20. THHN insulation is suitable for use in: A) Wet locations only B) Dry locations only C) Both wet and dry locations up to 90 °C D) Only in conduit Answer: C Explanation: THHN is rated for dry and wet locations, 90 °C (180 °F) in conduit. Question 21. The minimum burial depth for non-metallic sheathed cable (NM-B) in residential ground-level installations is: A) 6 in B) 12 in C) 18 in D) 24 in Answer: B Explanation: NEC 334.15 requires 12 in minimum cover for NM cable. Question 22. When installing MC cable, the maximum number of bends between supports is: A) 2 B) 3 C) 4 D) 6 Answer: D Explanation: NEC 320.30 allows up to six bends between supports for MC cable.
Journeyman Electrician Ultimate
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Question 23. The conduit fill for a single #4 AWG THHN conductor in EMT must not exceed what percent of the conduit’s internal area? A) 20 % B) 30 % C) 40 % D) 53 % Answer: B Explanation: Table 1 of Chapter 9 limits a single conductor to 53 % of conduit area; however for a single #4 THHN, the 40 % rule for one conductor applies. Question 24. What is the minimum size of a grounding electrode conductor (GEC) for a 200-amp service? A) #8 AWG copper B) #6 AWG copper C) #4 AWG copper D) #2 AWG copper Answer: C Explanation: Table 250.122 requires #4 AWG copper for 200-amp overcurrent devices. Question 25. Which conduit type is permitted for direct burial without a protective raceway? A) EMT B) RMC C) PVC Schedule 40 D) Flexible metal conduit (FMC) Answer: C Explanation: PVC Schedule 40 is rated for direct burial per NEC 352.10.
Journeyman Electrician Ultimate
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A) 80- 100 %
B) 100- 125 %
C) 115- 150 %
D) 150- 200 %
Answer: C Explanation: NEC 430.32 requires overloads at 115- 150 % of full-load current. Question 30. Which of the following is a required feature of a motor disconnecting means? A) Must be located within 6 ft of the motor B) Must have a lockout provision C) Must be a fused type only D) Must be a 2-pole breaker for three-phase motors Answer: B Explanation: NEC 430.102 requires a means to lock out the disconnect. Question 31. In a Class I, Division 2 hazardous location, which wiring method is permitted? A) NM cable B) Rigid metal conduit (RMC) C) PVC conduit with THHN D) Flexible metal conduit (FMC) Answer: B Explanation: RMC is listed for Class I, Division 2 environments. Question 32. An intrinsically safe circuit must be protected by a fuse not exceeding: A) 2 A B) 5 A
Journeyman Electrician Ultimate
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C) 10 A
D) 15 A
Answer: B Explanation: IEC/NEC standards limit intrinsically safe circuits to 5 A maximum fuse. Question 33. The required clearance between a swimming pool pump and the water’s edge is: A) 3 ft B) 5 ft C) 10 ft D) 15 ft Answer: B Explanation: NEC 680.23 requires at least 5 ft clearance for pool equipment. Question 34. An EV charging station that supplies 240 V, 40 A must be protected by a breaker of at least: A) 40 A B) 45 A C) 50 A D) 60 A Answer: C Explanation: NEC 625.41 requires the overcurrent device to be not less than the rating of the charger; a 40 A charger typically uses a 50 A breaker. Question 35. A photovoltaic (PV) array that produces 5 kW at 240 V requires a minimum conductor size of: A) #12 AWG copper B) #10 AWG copper C) #8 AWG copper
Journeyman Electrician Ultimate
Exam
Explanation: OFNP (plenum-rated) is approved for air-handling spaces. Question 39. The minimum PPE required when working on a circuit rated 600 V or less is: A) Hard hat only B) Safety glasses and insulated gloves C) Arc-flash suit, regardless of rating D) No PPE required if de-energized Answer: B Explanation: NEC 110.12(A) requires safety glasses and insulated gloves for 600 V or less. Question 40. The lockout/tagout (LOTO) procedure must be performed: A) Only on high-voltage equipment B) Before any servicing or maintenance on energized equipment C) After the work is completed D) Only when a fuse is present Answer: B Explanation: OSHA 1910.147 requires LOTO before servicing energized equipment. Question 41. When using a multimeter to test voltage, the meter must be set to a range at least: A) Equal to the expected voltage B) 10 % higher than the expected voltage C) 20 % higher than the expected voltage D) The highest possible range on the meter Answer: C Explanation: To avoid over-range, select a range 20 % higher than the anticipated voltage.
Journeyman Electrician Ultimate
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Question 42. A ladder used for electrical work must have a minimum rung spacing of: A) 8 in B) 10 in C) 12 in D) 14 in Answer: C Explanation: OSHA requires a maximum rung spacing of 12 in for safety. Question 43. The NEC defines “listed” equipment as: A) Equipment that has been inspected and approved by the manufacturer only B) Equipment that meets the standards of a recognized testing agency C) Any equipment sold in the United States D) Equipment that is only for residential use Answer: B Explanation: “Listed” means evaluation and approval by a recognized testing agency (e.g., UL). Question 44. Which of the following is the correct method to calculate voltage drop? A) Vdrop = I × R × 2 B) Vdrop = I × (R + X) × 2 C) Vdrop = I × (R × L) × 2 D) Vdrop = I × (2 × K × L) / CSA Answer: D Explanation: The NEC voltage-drop formula uses V = I × 2 × K × L / CSA.
Journeyman Electrician Ultimate
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Question 48. For a 120/240-V single-phase feeder supplying a 30-amp load, the minimum copper feeder size is: A) #12 AWG B) #10 AWG C) #8 AWG D) #6 AWG Answer: B Explanation: 30 A requires #10 AWG copper per Table 310.15(B)(16). Question 49. Which NEC article addresses requirements for emergency lighting systems? A) Article 700 B) Article 701 C) Article 702 D) Article 703 Answer: A Explanation: Article 700 covers emergency systems, including lighting. Question 50. The minimum distance between a receptacle and a bathtub edge is: A) 12 in B) 18 in C) 24 in D) 30 in Answer: C Explanation: NEC 210.8(A)(2) requires at least 24 in clearance. Question 51. When installing a GFCI receptacle in a bathroom, it must be protected by a breaker rated at:
Journeyman Electrician Ultimate
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A) 15 A
B) 20 A
C) 30 A
D) 40 A
Answer: B Explanation: Bathroom receptacles require 20-A circuits per NEC 210.11(C)(3). Question 52. The maximum number of conductors allowed in a 1-in EMT conduit without derating is: A) 3 B) 4 C) 5 D) 6 Answer: B Explanation: Up to 4 conductors can be installed without applying the 80 % derating factor. **Question 53. Which of the following is considered a “continuous load” under NEC? ** A) A 30-minute motor start B) A lighting circuit that operates 3 hours daily C) A refrigerator that cycles on/off D) A heating element that runs for 12 hours or more each day Answer: D Explanation: Loads operating for 3 hours or more continuously are classified as continuous. Question 54. A 3-phase, 4-wire service requires which type of grounding electrode system?
Journeyman Electrician Ultimate
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A) No correction – temperature is within standard range B) A 10 % increase factor C) A derating factor from Table 310.15(B)(2) D) A factor of 0. Answer: C Explanation: Table 310.15(B)(2) provides correction factors for temperatures above 30 °C. Question 58. Which of the following is the correct designation for a 4-wire, 120/240-V feeder? A) L1-L2-N-G B) L1-L2-L3-N C) L1-L2-L3-G D) L1-L2-N-E Answer: A Explanation: A 4-wire 120/240-V system includes two ungrounded conductors (L1, L2), a neutral (N), and a grounding conductor (G). Question 59. The NEC requires that a disconnecting means for a motor be located: A) Within sight of the motor location B) No more than 50 ft away C) Within the same room as the motor D) Within 6 ft of the motor Answer: A Explanation: “Within sight” means visible and not obstructed, per NEC 430.102. Question 60. For a 3-phase, 4-pole motor starter, the required overcurrent protection is based on:
Journeyman Electrician Ultimate
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A) Full-load current only B) Locked-rotor current only C) 125 % of full-load current D) 250 % of locked-rotor current Answer: C Explanation: NEC 430.32 specifies overload protection at 125 % of full-load current; the breaker can be sized per Table 430.250. Question 61. Which of the following is a permissible location for a receptacle in a kitchen countertop? A) More than 24 in from the countertop edge B) Within 12 in of the sink C) No farther than 48 in apart horizontally D) Directly above the stove Answer: C Explanation: NEC 210.52(C)(1) requires countertop receptacles to be no more than 48 in apart. Question 62. The NEC defines a “listed” circuit breaker as one that: A) Has been tested by the installer B) Meets UL or equivalent testing standards C) Is manufactured in the USA D) Is marked with a voltage rating only Answer: B Explanation: “Listed” means it has been evaluated by a recognized testing agency such as UL. Question 63. When installing a raceway in a concrete wall, the minimum cover to the nearest edge of the conduit is:
