NYC Master Electrician License
Examination: 100 Comprehensive
Practice Questions, Verified Answers &
Detailed Rationales (2026 Edition)
1. Which document establishes the minimum safety requirements for
electrical installations in New York City?
A. OSHA Construction Standards
B. NFPA 70E
C. NYC Electrical Code
D. International Plumbing Code
Answer: NYC Electrical Code
Rationale: The NYC Electrical Code, based on the National Electrical Code (NEC)
with local amendments, governs electrical installations within New York City.
2. What is the primary purpose of grounding an electrical system?
A. Increase voltage
B. Reduce conductor size
C. Provide a safe path for fault current
D. Improve lighting levels
,Answer: Provide a safe path for fault current
Rationale: Grounding limits dangerous voltages and allows overcurrent devices to
operate during faults.
3. Which conductor is intentionally connected to earth at the service?
A. Equipment grounding conductor
B. Bonding jumper
C. Grounded (neutral) conductor
D. Traveler conductor
Answer: Grounded (neutral) conductor
Rationale: The neutral is bonded to ground at the service disconnect to establish a
reference to earth.
4. Which NEC article covers branch circuits?
A. Article 110
B. Article 210
C. Article 250
D. Article 430
Answer: Article 210
Rationale: Article 210 contains requirements for branch circuit installation,
ratings, and receptacles.
5. What is the maximum continuous load permitted on an 80-amp breaker?
A. 80 amps
B. 72 amps
,C. 64 amps
D. 60 amps
Answer: 64 amps
Rationale: Continuous loads are limited to 80% of overcurrent device ratings
unless equipment is listed for 100% operation.
6. A continuous load is defined as one expected to run for:
A. 30 minutes
B. 1 hour
C. 3 hours or more
D. 8 hours
Answer: 3 hours or more
Rationale: The NEC defines continuous loads as those operating for three hours or
longer.
7. Which device protects people from electric shock due to ground faults?
A. AFCI
B. Surge protector
C. Disconnect switch
D. GFCI
Answer: GFCI
Rationale: Ground-Fault Circuit Interrupters detect leakage current and
disconnect power rapidly.
8. AFCI protection primarily guards against:
, A. Overloading
B. Grounding failures
C. Arc faults that may cause fires
D. Voltage drops
Answer: Arc faults that may cause fires
Rationale: Arc-Fault Circuit Interrupters reduce fire hazards caused by damaged
wiring or loose connections.
9. Bonding ensures:
A. Lower electric bills
B. Increased voltage
C. Metal parts remain at the same electrical potential
D. Higher circuit capacity
Answer: Metal parts remain at the same electrical potential
Rationale: Bonding minimizes shock hazards by connecting conductive parts
together.
10.Conductors are generally sized based primarily on:
A. Color
B. Length only
C. Ampacity
D. Manufacturer preference
Answer: Ampacity
Rationale: Conductors must safely carry the expected load without overheating.
Examination: 100 Comprehensive
Practice Questions, Verified Answers &
Detailed Rationales (2026 Edition)
1. Which document establishes the minimum safety requirements for
electrical installations in New York City?
A. OSHA Construction Standards
B. NFPA 70E
C. NYC Electrical Code
D. International Plumbing Code
Answer: NYC Electrical Code
Rationale: The NYC Electrical Code, based on the National Electrical Code (NEC)
with local amendments, governs electrical installations within New York City.
2. What is the primary purpose of grounding an electrical system?
A. Increase voltage
B. Reduce conductor size
C. Provide a safe path for fault current
D. Improve lighting levels
,Answer: Provide a safe path for fault current
Rationale: Grounding limits dangerous voltages and allows overcurrent devices to
operate during faults.
3. Which conductor is intentionally connected to earth at the service?
A. Equipment grounding conductor
B. Bonding jumper
C. Grounded (neutral) conductor
D. Traveler conductor
Answer: Grounded (neutral) conductor
Rationale: The neutral is bonded to ground at the service disconnect to establish a
reference to earth.
4. Which NEC article covers branch circuits?
A. Article 110
B. Article 210
C. Article 250
D. Article 430
Answer: Article 210
Rationale: Article 210 contains requirements for branch circuit installation,
ratings, and receptacles.
5. What is the maximum continuous load permitted on an 80-amp breaker?
A. 80 amps
B. 72 amps
,C. 64 amps
D. 60 amps
Answer: 64 amps
Rationale: Continuous loads are limited to 80% of overcurrent device ratings
unless equipment is listed for 100% operation.
6. A continuous load is defined as one expected to run for:
A. 30 minutes
B. 1 hour
C. 3 hours or more
D. 8 hours
Answer: 3 hours or more
Rationale: The NEC defines continuous loads as those operating for three hours or
longer.
7. Which device protects people from electric shock due to ground faults?
A. AFCI
B. Surge protector
C. Disconnect switch
D. GFCI
Answer: GFCI
Rationale: Ground-Fault Circuit Interrupters detect leakage current and
disconnect power rapidly.
8. AFCI protection primarily guards against:
, A. Overloading
B. Grounding failures
C. Arc faults that may cause fires
D. Voltage drops
Answer: Arc faults that may cause fires
Rationale: Arc-Fault Circuit Interrupters reduce fire hazards caused by damaged
wiring or loose connections.
9. Bonding ensures:
A. Lower electric bills
B. Increased voltage
C. Metal parts remain at the same electrical potential
D. Higher circuit capacity
Answer: Metal parts remain at the same electrical potential
Rationale: Bonding minimizes shock hazards by connecting conductive parts
together.
10.Conductors are generally sized based primarily on:
A. Color
B. Length only
C. Ampacity
D. Manufacturer preference
Answer: Ampacity
Rationale: Conductors must safely carry the expected load without overheating.
