NYC Master Electrician License Exam Questions
With Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. What is the minimum size copper grounding electrode conductor
(GEC) for a 200-amp service?
A. 6 AWG
B. 4 AWG
C. 2 AWG
D. 1/0 AWG
The NEC Table 250.66 requires a 2 AWG copper GEC for a 200-amp
service.
2. In NYC, which type of conduit is generally required for exposed
interior wiring in commercial buildings?
A. EMT
B. RMC
C. PVC
D. ENT
Rigid Metal Conduit (RMC) provides mechanical protection and
meets NYC code for exposed commercial areas.
3. What is the maximum distance between supports for 3/4-inch
EMT conduit?
A. 8 feet
B. 10 feet
C. 12 feet
D. 6 feet
NEC 358.30 requires EMT to be supported every 10 feet.
,4. Which color is typically used for a grounded (neutral) conductor in
branch circuits?
A. Black
B. Red
C. Blue
D. White
White is standard for grounded conductors under NEC Article 200.
5. In NYC, a ground-fault circuit interrupter (GFCI) is required in
which area?
A. Bedrooms
B. Bathrooms
C. Living rooms
D. Closets
NEC 210.8 requires GFCI protection in bathrooms.
6. What is the minimum working space in front of an electrical panel
rated 200 amps?
A. 24 inches
B. 30 inches
C. 36 inches
D. 42 inches
NEC 110.26 mandates at least 36 inches of clear working space.
7. Which NEC article covers flexible cords?
A. 300
B. 320
C. 400
D. 500
, Article 400 details the use, installation, and limitations of flexible
cords.
8. What is the maximum allowable voltage drop for feeders in a
commercial building?
A. 2%
B. 3%
C. 5%
D. 10%
NEC recommends a maximum 3% voltage drop for feeders to
ensure efficient operation.
9. Which device automatically opens a circuit when overcurrent
occurs?
A. Fuse
B. Circuit breaker
C. Both A and B
D. Switch
Both fuses and circuit breakers interrupt overcurrent to protect
wiring and devices.
10. In NYC, which type of conductor insulation is typically
required for wet locations?
A. THWN
B. NM-B
C. UF-B
D. MTW
THWN conductors are rated for wet locations per NEC 310.10(C).
11. What is the maximum number of 12 AWG conductors
allowed in a 4-inch square box?
With Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. What is the minimum size copper grounding electrode conductor
(GEC) for a 200-amp service?
A. 6 AWG
B. 4 AWG
C. 2 AWG
D. 1/0 AWG
The NEC Table 250.66 requires a 2 AWG copper GEC for a 200-amp
service.
2. In NYC, which type of conduit is generally required for exposed
interior wiring in commercial buildings?
A. EMT
B. RMC
C. PVC
D. ENT
Rigid Metal Conduit (RMC) provides mechanical protection and
meets NYC code for exposed commercial areas.
3. What is the maximum distance between supports for 3/4-inch
EMT conduit?
A. 8 feet
B. 10 feet
C. 12 feet
D. 6 feet
NEC 358.30 requires EMT to be supported every 10 feet.
,4. Which color is typically used for a grounded (neutral) conductor in
branch circuits?
A. Black
B. Red
C. Blue
D. White
White is standard for grounded conductors under NEC Article 200.
5. In NYC, a ground-fault circuit interrupter (GFCI) is required in
which area?
A. Bedrooms
B. Bathrooms
C. Living rooms
D. Closets
NEC 210.8 requires GFCI protection in bathrooms.
6. What is the minimum working space in front of an electrical panel
rated 200 amps?
A. 24 inches
B. 30 inches
C. 36 inches
D. 42 inches
NEC 110.26 mandates at least 36 inches of clear working space.
7. Which NEC article covers flexible cords?
A. 300
B. 320
C. 400
D. 500
, Article 400 details the use, installation, and limitations of flexible
cords.
8. What is the maximum allowable voltage drop for feeders in a
commercial building?
A. 2%
B. 3%
C. 5%
D. 10%
NEC recommends a maximum 3% voltage drop for feeders to
ensure efficient operation.
9. Which device automatically opens a circuit when overcurrent
occurs?
A. Fuse
B. Circuit breaker
C. Both A and B
D. Switch
Both fuses and circuit breakers interrupt overcurrent to protect
wiring and devices.
10. In NYC, which type of conductor insulation is typically
required for wet locations?
A. THWN
B. NM-B
C. UF-B
D. MTW
THWN conductors are rated for wet locations per NEC 310.10(C).
11. What is the maximum number of 12 AWG conductors
allowed in a 4-inch square box?
