Delaware Limited Master Electrician
Certification Practice 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 burial depth for rigid metal conduit (RMC) under a
residential driveway according to NEC guidelines?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
✔ Correct Answer: C. 18 inches
Explanation: NEC Table 300.5 specifies minimum cover requirements; for
RMC under driveways, 18 inches is required for adequate protection.
2. A continuous load is defined as a load where the maximum current is
expected to continue for how long?
A. 1 hour or more
B. 2 hours or more
C. 3 hours or more
D. 4 hours or more
✔ Correct Answer: C. 3 hours or more
Explanation: NEC defines a continuous load as one expected to run for 3
hours or more, impacting conductor and overcurrent sizing.
3. What is the required ampacity adjustment factor for 4 current-carrying
conductors in a raceway?
A. 100%
, B. 90%
C. 80%
D. 70%
✔ Correct Answer: C. 80%
Explanation: NEC Table 310.15(C)(1) requires an 80% adjustment factor for
4–6 current-carrying conductors.
4. Which conductor type is permitted for direct burial without conduit?
A. THHN
B. UF
C. NM
D. SE
✔ Correct Answer: B. UF
Explanation: Underground Feeder (UF) cable is specifically listed for direct
burial applications.
5. What is the minimum size copper grounding electrode conductor for a 200A
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 grounding electrode
conductor for 200A services.
6. In a dwelling unit, what is the minimum number of small appliance branch
circuits required?
A. One
B. Two
C. Three
D. Four
✔ Correct Answer: B. Two
, Explanation: NEC requires at least two 20-amp small appliance circuits for
kitchen/dining areas.
7. A 20A circuit using #12 AWG copper wire has a voltage of 120V. What is the
maximum load in watts?
A. 1,200 W
B. 2,000 W
C. 2,400 W
D. 2,800 W
✔ Correct Answer: C. 2,400 W
Explanation: Power = Voltage × Current = 120V × 20A = 2400W.
8. What is the maximum number of 90-degree bends allowed between pull
points in a conduit run?
A. Two
B. Three
C. Four
D. Five
✔ Correct Answer: C. Four
Explanation: NEC limits conduit bends to 360 degrees total between pull
points.
9. Which device protects against ground-fault shock hazards?
A. AFCI
B. GFCI
C. Fuse
D. Breaker
✔ Correct Answer: B. GFCI
Explanation: Ground-Fault Circuit Interrupters detect imbalance and shut
off power quickly.
10.What is the minimum working clearance in front of electrical panels up to
150V to ground?
A. 24 inches
Certification Practice 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 burial depth for rigid metal conduit (RMC) under a
residential driveway according to NEC guidelines?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
✔ Correct Answer: C. 18 inches
Explanation: NEC Table 300.5 specifies minimum cover requirements; for
RMC under driveways, 18 inches is required for adequate protection.
2. A continuous load is defined as a load where the maximum current is
expected to continue for how long?
A. 1 hour or more
B. 2 hours or more
C. 3 hours or more
D. 4 hours or more
✔ Correct Answer: C. 3 hours or more
Explanation: NEC defines a continuous load as one expected to run for 3
hours or more, impacting conductor and overcurrent sizing.
3. What is the required ampacity adjustment factor for 4 current-carrying
conductors in a raceway?
A. 100%
, B. 90%
C. 80%
D. 70%
✔ Correct Answer: C. 80%
Explanation: NEC Table 310.15(C)(1) requires an 80% adjustment factor for
4–6 current-carrying conductors.
4. Which conductor type is permitted for direct burial without conduit?
A. THHN
B. UF
C. NM
D. SE
✔ Correct Answer: B. UF
Explanation: Underground Feeder (UF) cable is specifically listed for direct
burial applications.
5. What is the minimum size copper grounding electrode conductor for a 200A
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 grounding electrode
conductor for 200A services.
6. In a dwelling unit, what is the minimum number of small appliance branch
circuits required?
A. One
B. Two
C. Three
D. Four
✔ Correct Answer: B. Two
, Explanation: NEC requires at least two 20-amp small appliance circuits for
kitchen/dining areas.
7. A 20A circuit using #12 AWG copper wire has a voltage of 120V. What is the
maximum load in watts?
A. 1,200 W
B. 2,000 W
C. 2,400 W
D. 2,800 W
✔ Correct Answer: C. 2,400 W
Explanation: Power = Voltage × Current = 120V × 20A = 2400W.
8. What is the maximum number of 90-degree bends allowed between pull
points in a conduit run?
A. Two
B. Three
C. Four
D. Five
✔ Correct Answer: C. Four
Explanation: NEC limits conduit bends to 360 degrees total between pull
points.
9. Which device protects against ground-fault shock hazards?
A. AFCI
B. GFCI
C. Fuse
D. Breaker
✔ Correct Answer: B. GFCI
Explanation: Ground-Fault Circuit Interrupters detect imbalance and shut
off power quickly.
10.What is the minimum working clearance in front of electrical panels up to
150V to ground?
A. 24 inches
