Residential Electrician Certification Practice Exam
Questions And Correct Answers (Verified Answers)
Plus Rationales 2025/2026 Q&A |Already graded A+
1. What is the primary purpose of the equipment grounding conductor?
A. Carry normal load current
B. Provide a path for fault current
C. Increase system voltage
D. Prevent voltage drop
Answer: B
The equipment grounding conductor provides a low-impedance path for fault
current to facilitate overcurrent device operation.
2. Which NEC article primarily covers residential wiring methods?
A. Article 110
B. Article 210
C. Article 300
D. Article 400
Answer: C
Article 300 contains general requirements for wiring methods used in
residential installations.
3. What is the minimum ampere rating for a general-purpose residential
lighting circuit?
A. 10 amps
B. 15 amps
C. 20 amps
D. 30 amps
Answer: B
General lighting circuits in residences must be at least 15 amps per NEC 210.
,4. Which conductor color is required for grounding?
A. White
B. Black
C. Green or bare
D. Red
Answer: C
Green or bare conductors are designated for grounding purposes.
5. What device protects against ground faults in residential bathrooms?
A. AFCI
B. GFCI
C. Circuit breaker
D. Fuse
Answer: B
GFCIs protect people from electric shock caused by ground faults.
6. What is the maximum number of receptacles allowed on a 15-amp
residential circuit?
A. 8
B. 10
C. Unlimited (load dependent)
D. 12
Answer: C
The NEC does not limit the number of receptacles; it limits the load.
7. What size copper conductor is required for a 20-amp branch circuit?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
, Answer: B
12 AWG copper is rated for 20 amps under normal conditions.
8. Which area requires AFCI protection in a dwelling?
A. Garage
B. Bathroom
C. Living room
D. Outdoor receptacles
Answer: C
AFCI protection is required in most habitable rooms, including living rooms.
9. What is the minimum height for receptacles above a countertop?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Answer: A
Countertop receptacles must be no more than 20 inches above, commonly
placed at 6 inches.
10. What does NEC stand for?
A. National Energy Code
B. National Electrical Code
C. National Electric Council
D. National Engineering Code
Answer: B
NEC is the National Electrical Code, governing safe electrical installations.
11. Which wiring method is most common in residential construction?
A. EMT
B. Rigid conduit
Questions And Correct Answers (Verified Answers)
Plus Rationales 2025/2026 Q&A |Already graded A+
1. What is the primary purpose of the equipment grounding conductor?
A. Carry normal load current
B. Provide a path for fault current
C. Increase system voltage
D. Prevent voltage drop
Answer: B
The equipment grounding conductor provides a low-impedance path for fault
current to facilitate overcurrent device operation.
2. Which NEC article primarily covers residential wiring methods?
A. Article 110
B. Article 210
C. Article 300
D. Article 400
Answer: C
Article 300 contains general requirements for wiring methods used in
residential installations.
3. What is the minimum ampere rating for a general-purpose residential
lighting circuit?
A. 10 amps
B. 15 amps
C. 20 amps
D. 30 amps
Answer: B
General lighting circuits in residences must be at least 15 amps per NEC 210.
,4. Which conductor color is required for grounding?
A. White
B. Black
C. Green or bare
D. Red
Answer: C
Green or bare conductors are designated for grounding purposes.
5. What device protects against ground faults in residential bathrooms?
A. AFCI
B. GFCI
C. Circuit breaker
D. Fuse
Answer: B
GFCIs protect people from electric shock caused by ground faults.
6. What is the maximum number of receptacles allowed on a 15-amp
residential circuit?
A. 8
B. 10
C. Unlimited (load dependent)
D. 12
Answer: C
The NEC does not limit the number of receptacles; it limits the load.
7. What size copper conductor is required for a 20-amp branch circuit?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
, Answer: B
12 AWG copper is rated for 20 amps under normal conditions.
8. Which area requires AFCI protection in a dwelling?
A. Garage
B. Bathroom
C. Living room
D. Outdoor receptacles
Answer: C
AFCI protection is required in most habitable rooms, including living rooms.
9. What is the minimum height for receptacles above a countertop?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Answer: A
Countertop receptacles must be no more than 20 inches above, commonly
placed at 6 inches.
10. What does NEC stand for?
A. National Energy Code
B. National Electrical Code
C. National Electric Council
D. National Engineering Code
Answer: B
NEC is the National Electrical Code, governing safe electrical installations.
11. Which wiring method is most common in residential construction?
A. EMT
B. Rigid conduit
