NYC Master Electrician License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the maximum number of 15-ampere branch circuits allowed
to be supplied by a single 20-ampere breaker?
A) 1
B) 2
C) 3
D) 4
Rationale: A 20A breaker can safely supply up to two 15A circuits if
load calculations do not exceed the breaker rating.
2. In NYC, what is the minimum working space in front of an electrical
panel rated 200A or less?
A) 24 inches
B) 30 inches
, C) 36 inches
D) 42 inches
Rationale: NEC and NYC Electrical Code require 36 inches of clear
working space in front of panels to ensure safe operation and
maintenance.
3. What type of conductor insulation is required for wet locations in
NYC?
A) THHN
B) THWN
C) XHHW
D) NM-B
Rationale: THWN conductors are rated for wet locations and meet
NYC Code requirements.
4. What is the maximum allowable voltage drop for branch circuits in a
dwelling unit?
A) 1%
B) 2%
C) 3%
D) 5%
Rationale: The recommended maximum voltage drop for branch
circuits is 3% to ensure proper device operation and efficiency.
5. Which device is required to protect personnel from electrical shock in
wet locations?
, A) Fuse
B) Circuit breaker
C) GFCI
D) AFCI
Rationale: Ground-Fault Circuit Interrupters (GFCI) protect individuals
from shock in wet locations as mandated by NYC Code.
6. For a 3-phase, 480V system, which of the following is the correct
phase-to-neutral voltage?
A) 208V
B) 240V
C) 277V
D) 480V
Rationale: In a 3-phase, 480V system, the phase-to-neutral voltage is
calculated as 480V ÷ √3 ≈ 277V.
7. What is the minimum burial depth for a PVC conduit carrying
120/240V circuits under a sidewalk?
A) 6 inches
B) 12 inches
C) 18 inches
D) 24 inches
Rationale: NYC Electrical Code requires a minimum burial depth of 18
inches for PVC conduit under sidewalks to protect against mechanical
damage.
, 8. What is the maximum overcurrent protection for a 14 AWG copper
conductor in a residential circuit?
A) 10A
B) 15A
C) 20A
D) 25A
Rationale: 14 AWG copper wire is rated for 15 amperes, which is the
maximum breaker size allowed.
9. What is the minimum number of receptacles required for a 12-foot
wall in a kitchen counter area?
A) 1
B) 2
C) 3
D) 4
Rationale: NEC and NYC Code require receptacles at intervals no
more than 4 feet apart along countertops, so a 12-foot wall requires
three receptacles.
10. Which of the following is required on all 125V, single-phase, 15-
and 20-ampere receptacles in dwelling units?
A) AFCI protection
B) GFCI protection
C) Surge protection
D) Isolation transformer
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the maximum number of 15-ampere branch circuits allowed
to be supplied by a single 20-ampere breaker?
A) 1
B) 2
C) 3
D) 4
Rationale: A 20A breaker can safely supply up to two 15A circuits if
load calculations do not exceed the breaker rating.
2. In NYC, what is the minimum working space in front of an electrical
panel rated 200A or less?
A) 24 inches
B) 30 inches
, C) 36 inches
D) 42 inches
Rationale: NEC and NYC Electrical Code require 36 inches of clear
working space in front of panels to ensure safe operation and
maintenance.
3. What type of conductor insulation is required for wet locations in
NYC?
A) THHN
B) THWN
C) XHHW
D) NM-B
Rationale: THWN conductors are rated for wet locations and meet
NYC Code requirements.
4. What is the maximum allowable voltage drop for branch circuits in a
dwelling unit?
A) 1%
B) 2%
C) 3%
D) 5%
Rationale: The recommended maximum voltage drop for branch
circuits is 3% to ensure proper device operation and efficiency.
5. Which device is required to protect personnel from electrical shock in
wet locations?
, A) Fuse
B) Circuit breaker
C) GFCI
D) AFCI
Rationale: Ground-Fault Circuit Interrupters (GFCI) protect individuals
from shock in wet locations as mandated by NYC Code.
6. For a 3-phase, 480V system, which of the following is the correct
phase-to-neutral voltage?
A) 208V
B) 240V
C) 277V
D) 480V
Rationale: In a 3-phase, 480V system, the phase-to-neutral voltage is
calculated as 480V ÷ √3 ≈ 277V.
7. What is the minimum burial depth for a PVC conduit carrying
120/240V circuits under a sidewalk?
A) 6 inches
B) 12 inches
C) 18 inches
D) 24 inches
Rationale: NYC Electrical Code requires a minimum burial depth of 18
inches for PVC conduit under sidewalks to protect against mechanical
damage.
, 8. What is the maximum overcurrent protection for a 14 AWG copper
conductor in a residential circuit?
A) 10A
B) 15A
C) 20A
D) 25A
Rationale: 14 AWG copper wire is rated for 15 amperes, which is the
maximum breaker size allowed.
9. What is the minimum number of receptacles required for a 12-foot
wall in a kitchen counter area?
A) 1
B) 2
C) 3
D) 4
Rationale: NEC and NYC Code require receptacles at intervals no
more than 4 feet apart along countertops, so a 12-foot wall requires
three receptacles.
10. Which of the following is required on all 125V, single-phase, 15-
and 20-ampere receptacles in dwelling units?
A) AFCI protection
B) GFCI protection
C) Surge protection
D) Isolation transformer
