Michigan Master Electrician Licensing Exam
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
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1. Which of the following is the minimum size copper grounding
electrode conductor for a 200-amp service?
A. 6 AWG
B. 4 AWG
C. 2 AWG
D. 1/0 AWG
B. 4 AWG
The NEC requires a 4 AWG copper conductor for grounding
electrodes on a 200-amp service.
2. What is the maximum number of 15-ampere, 120-volt receptacles
allowed on a 20-ampere branch circuit in a dwelling?
A. 8
B. 10
C. 12
D. No maximum specified
D. No maximum specified
The NEC does not limit the number of receptacles, but the total
load must not exceed the branch circuit rating.
,3. For a feeder supplying a continuous load of 48 amps and a
noncontinuous load of 32 amps, what is the minimum conductor
size assuming copper and THHN insulation?
A. 8 AWG
B. 6 AWG
C. 4 AWG
D. 2 AWG
B. 6 AWG
Continuous loads require 125% of load, so total ampacity = (48 ×
1.25) + 32 = 92 amps. 6 AWG copper (75°C) is rated for 95 amps.
4. Which of the following devices is required to provide protection
from arcing faults in a dwelling unit?
A. GFCI
B. AFCI
C. Standard circuit breaker
D. Surge protector
B. AFCI
AFCI (Arc Fault Circuit Interrupter) devices detect arcing conditions
and prevent fires in dwelling circuits.
5. The voltage drop for feeders should not exceed:
A. 1%
B. 3%
C. 5%
D. 10%
B. 3%
The NEC recommends a maximum voltage drop of 3% for feeders
to ensure efficiency and proper operation of equipment.
,6. What is the minimum height above finished grade for service
conductors over a residential driveway?
A. 10 feet
B. 12 feet
C. 18 feet
D. 20 feet
B. 12 feet
Service drop conductors must maintain 12 feet clearance over
residential driveways according to NEC Table 230.24.
7. What is the maximum distance a receptacle can be installed from
a wall in a kitchen countertop area?
A. 2 feet
B. 3 feet
C. 4 feet
D. 6 feet
B. 3 feet
NEC 210.52(C) requires that countertop receptacles be installed so
that no point is more than 24 inches from a receptacle, effectively
a 3-foot spacing.
8. Which type of conduit is NOT permitted for use in wet locations?
A. PVC Schedule 40
B. Rigid steel (RMC)
C. EMT
D. FMC (Flexible metal conduit)
D. FMC (Flexible metal conduit)
FMC is not listed for wet locations; for wet locations, LFMC or PVC
are required.
, 9. When sizing a feeder for three-phase motors, the NEC requires
using:
A. Full-load current multiplied by 125%
B. Full-load current multiplied by 115%
C. Full-load current with no adjustment
D. Full-load current multiplied by 150%
A. Full-load current multiplied by 125%
Feeder conductors must carry 125% of the motor full-load current
for continuous duty.
10. The main bonding jumper connects:
A. The neutral to the panel cover
B. The service neutral to the service grounding electrode
C. The equipment grounding conductor to the neutral bar
D. The ground rod to the water pipe
B. The service neutral to the service grounding electrode
The main bonding jumper ensures a low-resistance path between
the neutral and grounding system.
11. What is the minimum size copper conductor for a 100-
ampere single-phase service using THWN conductors?
A. 4 AWG
B. 3 AWG
C. 2 AWG
D. 1 AWG
A. 4 AWG
According to NEC Table 310.16, 4 AWG copper THWN is rated 85–
100 amps depending on insulation rating and temperature.
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. Which of the following is the minimum size copper grounding
electrode conductor for a 200-amp service?
A. 6 AWG
B. 4 AWG
C. 2 AWG
D. 1/0 AWG
B. 4 AWG
The NEC requires a 4 AWG copper conductor for grounding
electrodes on a 200-amp service.
2. What is the maximum number of 15-ampere, 120-volt receptacles
allowed on a 20-ampere branch circuit in a dwelling?
A. 8
B. 10
C. 12
D. No maximum specified
D. No maximum specified
The NEC does not limit the number of receptacles, but the total
load must not exceed the branch circuit rating.
,3. For a feeder supplying a continuous load of 48 amps and a
noncontinuous load of 32 amps, what is the minimum conductor
size assuming copper and THHN insulation?
A. 8 AWG
B. 6 AWG
C. 4 AWG
D. 2 AWG
B. 6 AWG
Continuous loads require 125% of load, so total ampacity = (48 ×
1.25) + 32 = 92 amps. 6 AWG copper (75°C) is rated for 95 amps.
4. Which of the following devices is required to provide protection
from arcing faults in a dwelling unit?
A. GFCI
B. AFCI
C. Standard circuit breaker
D. Surge protector
B. AFCI
AFCI (Arc Fault Circuit Interrupter) devices detect arcing conditions
and prevent fires in dwelling circuits.
5. The voltage drop for feeders should not exceed:
A. 1%
B. 3%
C. 5%
D. 10%
B. 3%
The NEC recommends a maximum voltage drop of 3% for feeders
to ensure efficiency and proper operation of equipment.
,6. What is the minimum height above finished grade for service
conductors over a residential driveway?
A. 10 feet
B. 12 feet
C. 18 feet
D. 20 feet
B. 12 feet
Service drop conductors must maintain 12 feet clearance over
residential driveways according to NEC Table 230.24.
7. What is the maximum distance a receptacle can be installed from
a wall in a kitchen countertop area?
A. 2 feet
B. 3 feet
C. 4 feet
D. 6 feet
B. 3 feet
NEC 210.52(C) requires that countertop receptacles be installed so
that no point is more than 24 inches from a receptacle, effectively
a 3-foot spacing.
8. Which type of conduit is NOT permitted for use in wet locations?
A. PVC Schedule 40
B. Rigid steel (RMC)
C. EMT
D. FMC (Flexible metal conduit)
D. FMC (Flexible metal conduit)
FMC is not listed for wet locations; for wet locations, LFMC or PVC
are required.
, 9. When sizing a feeder for three-phase motors, the NEC requires
using:
A. Full-load current multiplied by 125%
B. Full-load current multiplied by 115%
C. Full-load current with no adjustment
D. Full-load current multiplied by 150%
A. Full-load current multiplied by 125%
Feeder conductors must carry 125% of the motor full-load current
for continuous duty.
10. The main bonding jumper connects:
A. The neutral to the panel cover
B. The service neutral to the service grounding electrode
C. The equipment grounding conductor to the neutral bar
D. The ground rod to the water pipe
B. The service neutral to the service grounding electrode
The main bonding jumper ensures a low-resistance path between
the neutral and grounding system.
11. What is the minimum size copper conductor for a 100-
ampere single-phase service using THWN conductors?
A. 4 AWG
B. 3 AWG
C. 2 AWG
D. 1 AWG
A. 4 AWG
According to NEC Table 310.16, 4 AWG copper THWN is rated 85–
100 amps depending on insulation rating and temperature.
