Journeyman Electrician’s Exam Journeyman Electrician's 2026 Edition 4 — Questions and Answers
Question 1: In a commercial occupancy, what is the general lighting load used for load calculations expressed in volt-amperes per square foot?
- 1.5 VA/sq ft
- 2 VA/sq ft
- 3.5 VA/sq ft
- 3 VA/sq ft (Correct answer)
Correct answer: 3 VA/sq ft
NEC Table 220.12 assigns a general lighting load of 3 VA per square foot for commercial occupancies.
Question 2: What is the purpose of an equipment bonding jumper in an electrical system?
- To provide a low-impedance fault return path to the source (Correct answer)
- To reduce voltage drop on long branch circuits
- To balance phase loads across a panel
- To isolate sensitive equipment from noise
Correct answer: To provide a low-impedance fault return path to the source
An equipment bonding jumper connects non-current-carrying metal parts to ensure a low-impedance path back to the source to facilitate overcurrent device operation.
Question 3: When is an arc-fault circuit interrupter (AFCI) required for a bedroom circuit in a dwelling unit?
- Only for new construction
- Only when the circuit is 20 amps
- For all 120V, 15A or 20A branch circuits supplying outlets in bedrooms (Correct answer)
- Only when a receptacle is within 6 feet of the bed
Correct answer: For all 120V, 15A or 20A branch circuits supplying outlets in bedrooms
NEC 210.12(A) requires AFCI protection for all 120V, 15A or 20A branch circuits supplying outlets or devices in dwelling unit bedrooms.
Question 4: What is the minimum headroom required in front of electrical equipment rated over 600V?
- 5.5 feet
- 6 feet
- 6.5 feet (Correct answer)
- 7 feet
Correct answer: 6.5 feet
NEC 110.26(A)(1) requires a minimum working space height of 6.5 feet (or the height of the equipment if greater) for electrical equipment rated over 600V.
Question 5: For a 3-phase motor with a nameplate full-load current (FLC) of 40A, what is the maximum rating of an inverse time circuit breaker used as the branch-circuit short-circuit and ground-fault protective device?
- 50A
- 60A
- 100A (Correct answer)
- 200A
Correct answer: 100A
Per NEC Table 430.52, an inverse time breaker for a 3-phase AC motor may be rated up to 250% of FLC; 40A × 250% = 100A.
Question 6: What is the minimum wire-bending space required at the terminals of a panelboard bus when the conductor is 1/0 AWG copper?
- 2 inches
- 2.5 inches
- 3 inches (Correct answer)
- 3.5 inches
Correct answer: 3 inches
NEC Table 312.6(A) requires a minimum 3-inch wire-bending space for a 1/0 AWG conductor entering a terminal in a panelboard.
Question 7: A 120/240V single-phase service entrance has two ungrounded conductors and one grounded (neutral) conductor. What is the minimum size copper grounding electrode conductor for a 200A service?
- 6 AWG
- 4 AWG (Correct answer)
- 2 AWG
- 1/0 AWG
Correct answer: 4 AWG
Per NEC Table 250.66, a 200A service with copper service entrance conductors requires a 4 AWG copper grounding electrode conductor.
Journeyman Electrician’s Exam Journeyman Electrician's 2026 Edition 4
In a commercial occupancy, what is the general lighting load used for load calculations expressed in volt-amperes per square foot?