Maine Journeyman Electrician Exam
Newest (2026 Update) Actual Practice
Questions – Set 100 Most Common Exam
Questions And Answers In Details 100%
Verified Exam
1. What is the minimum cover required for direct-buried residential branch
circuits rated 120 volts or less with GFCI protection
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
✔ Correct Answer: A. 6 inches
Explanation: NEC Table 300.5 allows 6 inches for GFCI-protected 120V
residential branch circuits.
2. What type of conductor insulation is required for wet locations
A. THHN
B. THWN
C. NM-B
D. UF-B
✔ Correct Answer: B. THWN
Explanation: THWN insulation is rated for wet locations as required by
NEC 310.10.
3. What is the maximum number of 90°C current-carrying conductors in a
conduit before derating begins
A. 2
B. 3
C. 4
, D. 6
✔ Correct Answer: B. 3
Explanation: Ampacity adjustment begins when more than three current-
carrying conductors are installed.
4. What is the minimum size copper grounding electrode conductor for a 200-
amp service
A. #8 AWG
B. #6 AWG
C. #4 AWG
D. #2 AWG
✔ Correct Answer: B. #6 AWG
Explanation: NEC Table 250.66 specifies #6 copper for 200A services.
5. A box contains 3 #12 conductors and 2 devices. What is the minimum box
volume required
A. 16 cubic inches
B. 18 cubic inches
C. 20 cubic inches
D. 22 cubic inches
✔ Correct Answer: B. 18 cubic inches
Explanation: Each #12 requires 2.25 cubic inches; devices count as two
conductors each.
6. What is the purpose of a bonding jumper
A. Increase voltage
B. Provide overcurrent protection
C. Ensure electrical continuity
D. Reduce resistance
✔ Correct Answer: C. Ensure electrical continuity
Explanation: Bonding jumpers ensure effective fault current path
continuity.
, 7. What is the maximum continuous load on a 20A breaker
A. 16A
B. 18A
C. 20A
D. 22A
✔ Correct Answer: A. 16A
Explanation: Continuous loads are limited to 80% of breaker rating.
8. Which conductor is identified by white insulation
A. Ground
B. Neutral
C. Hot
D. Bonding
✔ Correct Answer: B. Neutral
Explanation: White or gray identifies grounded (neutral) conductors.
9. What is the NEC requirement for GFCI protection in bathrooms
A. Lighting only
B. Receptacles only
C. Both lighting and receptacles
D. None
✔ Correct Answer: B. Receptacles only
Explanation: NEC 210.8 requires GFCI protection for bathroom
receptacles.
10.What is the minimum working clearance in front of electrical equipment
A. 2 feet
B. 3 feet
C. 4 feet
D. 5 feet
✔ Correct Answer: B. 3 feet
Explanation: NEC 110.26 requires at least 3 feet of clearance.
Newest (2026 Update) Actual Practice
Questions – Set 100 Most Common Exam
Questions And Answers In Details 100%
Verified Exam
1. What is the minimum cover required for direct-buried residential branch
circuits rated 120 volts or less with GFCI protection
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
✔ Correct Answer: A. 6 inches
Explanation: NEC Table 300.5 allows 6 inches for GFCI-protected 120V
residential branch circuits.
2. What type of conductor insulation is required for wet locations
A. THHN
B. THWN
C. NM-B
D. UF-B
✔ Correct Answer: B. THWN
Explanation: THWN insulation is rated for wet locations as required by
NEC 310.10.
3. What is the maximum number of 90°C current-carrying conductors in a
conduit before derating begins
A. 2
B. 3
C. 4
, D. 6
✔ Correct Answer: B. 3
Explanation: Ampacity adjustment begins when more than three current-
carrying conductors are installed.
4. What is the minimum size copper grounding electrode conductor for a 200-
amp service
A. #8 AWG
B. #6 AWG
C. #4 AWG
D. #2 AWG
✔ Correct Answer: B. #6 AWG
Explanation: NEC Table 250.66 specifies #6 copper for 200A services.
5. A box contains 3 #12 conductors and 2 devices. What is the minimum box
volume required
A. 16 cubic inches
B. 18 cubic inches
C. 20 cubic inches
D. 22 cubic inches
✔ Correct Answer: B. 18 cubic inches
Explanation: Each #12 requires 2.25 cubic inches; devices count as two
conductors each.
6. What is the purpose of a bonding jumper
A. Increase voltage
B. Provide overcurrent protection
C. Ensure electrical continuity
D. Reduce resistance
✔ Correct Answer: C. Ensure electrical continuity
Explanation: Bonding jumpers ensure effective fault current path
continuity.
, 7. What is the maximum continuous load on a 20A breaker
A. 16A
B. 18A
C. 20A
D. 22A
✔ Correct Answer: A. 16A
Explanation: Continuous loads are limited to 80% of breaker rating.
8. Which conductor is identified by white insulation
A. Ground
B. Neutral
C. Hot
D. Bonding
✔ Correct Answer: B. Neutral
Explanation: White or gray identifies grounded (neutral) conductors.
9. What is the NEC requirement for GFCI protection in bathrooms
A. Lighting only
B. Receptacles only
C. Both lighting and receptacles
D. None
✔ Correct Answer: B. Receptacles only
Explanation: NEC 210.8 requires GFCI protection for bathroom
receptacles.
10.What is the minimum working clearance in front of electrical equipment
A. 2 feet
B. 3 feet
C. 4 feet
D. 5 feet
✔ Correct Answer: B. 3 feet
Explanation: NEC 110.26 requires at least 3 feet of clearance.
