Electrical Contractor (Master) License
QUESTION AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A INSTANT DOWNLOAD PDF
1. Which of the following is the minimum gauge for grounding
electrode conductor for a 200-amp service?
a) 6 AWG
b) 4 AWG
c) 3 AWG
d) 2 AWG
Rationale: The NEC requires a 3 AWG copper conductor for
grounding a 200-amp service.
2. What is the maximum number of 12 AWG conductors allowed in a
2-inch conduit under NEC?
a) 20
b) 25
c) 30
d) 35
Rationale: NEC conduit fill tables allow up to 25 12 AWG
conductors in a 2-inch conduit.
3. In a residential dwelling, the minimum branch circuit rating for a
kitchen countertop outlet is:
a) 15 amps
b) 20 amps
, c) 25 amps
d) 30 amps
Rationale: NEC requires at least one 20-amp branch circuit for
kitchen countertops.
4. What type of fire extinguisher is required for electrical fires?
a) Water
b) Foam
c) Class C
d) ABC
Rationale: Class C extinguishers are designed for energized
electrical equipment.
5. Which device protects against ground fault?
a) Circuit breaker
b) Fuse
c) GFCI
d) AFCI
Rationale: Ground Fault Circuit Interrupters (GFCIs) detect
current leakage to ground and trip.
6. The NEC defines a dwelling unit as:
a) A single apartment
b) A single floor of a building
c) A single unit providing complete living facilities
d) Any building with electrical service
Rationale: NEC defines a dwelling unit as providing living,
sleeping, cooking, and sanitary facilities.
7. For a three-phase 480V, 100A load, the minimum conductor size
is:
, a) 2 AWG
b) 1/0 AWG
c) 3/0 AWG
d) 4/0 AWG
Rationale: Using NEC ampacity tables, 3/0 AWG copper is
suitable for 100A in 75°C conditions.
8. Which of the following wiring methods is allowed in wet
locations?
a) NM-B cable
b) UF cable
c) MC cable in dry locations only
d) SE cable only
Rationale: Underground Feeder (UF) cable is rated for wet
locations.
9. What is the maximum distance a receptacle can be from a sink in a
kitchen?
a) 2 feet
b) 3 feet
c) 6 feet
d) 10 feet
Rationale: NEC requires GFCI protection for receptacles within 6
feet of a sink.
10. Which conductor color is typically used for neutral in a
branch circuit?
a) Black
b) Red
c) Blue
QUESTION AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A INSTANT DOWNLOAD PDF
1. Which of the following is the minimum gauge for grounding
electrode conductor for a 200-amp service?
a) 6 AWG
b) 4 AWG
c) 3 AWG
d) 2 AWG
Rationale: The NEC requires a 3 AWG copper conductor for
grounding a 200-amp service.
2. What is the maximum number of 12 AWG conductors allowed in a
2-inch conduit under NEC?
a) 20
b) 25
c) 30
d) 35
Rationale: NEC conduit fill tables allow up to 25 12 AWG
conductors in a 2-inch conduit.
3. In a residential dwelling, the minimum branch circuit rating for a
kitchen countertop outlet is:
a) 15 amps
b) 20 amps
, c) 25 amps
d) 30 amps
Rationale: NEC requires at least one 20-amp branch circuit for
kitchen countertops.
4. What type of fire extinguisher is required for electrical fires?
a) Water
b) Foam
c) Class C
d) ABC
Rationale: Class C extinguishers are designed for energized
electrical equipment.
5. Which device protects against ground fault?
a) Circuit breaker
b) Fuse
c) GFCI
d) AFCI
Rationale: Ground Fault Circuit Interrupters (GFCIs) detect
current leakage to ground and trip.
6. The NEC defines a dwelling unit as:
a) A single apartment
b) A single floor of a building
c) A single unit providing complete living facilities
d) Any building with electrical service
Rationale: NEC defines a dwelling unit as providing living,
sleeping, cooking, and sanitary facilities.
7. For a three-phase 480V, 100A load, the minimum conductor size
is:
, a) 2 AWG
b) 1/0 AWG
c) 3/0 AWG
d) 4/0 AWG
Rationale: Using NEC ampacity tables, 3/0 AWG copper is
suitable for 100A in 75°C conditions.
8. Which of the following wiring methods is allowed in wet
locations?
a) NM-B cable
b) UF cable
c) MC cable in dry locations only
d) SE cable only
Rationale: Underground Feeder (UF) cable is rated for wet
locations.
9. What is the maximum distance a receptacle can be from a sink in a
kitchen?
a) 2 feet
b) 3 feet
c) 6 feet
d) 10 feet
Rationale: NEC requires GFCI protection for receptacles within 6
feet of a sink.
10. Which conductor color is typically used for neutral in a
branch circuit?
a) Black
b) Red
c) Blue
