California General Electrician Certification
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A |
Instant Download Pdf
1. What is the minimum size copper grounding electrode conductor for a 200-
ampere residential service?
A. 6 AWG
B. 4 AWG
C. 2 AWG
D. 1 AWG
Rationale: Per NEC 250.66, for a 200A service, the minimum copper grounding
electrode conductor is 4 AWG.
2. What type of conduit is approved for direct burial without additional
protection?
A. EMT
B. IMC
C. RMC
D. PVC Schedule 80
Rationale: Schedule 80 PVC is rated for direct burial due to its thickness and
durability (NEC 352).
3. In which location is GFCI protection NOT required?
,A. Bathrooms
B. Unfinished basements
C. Dining rooms
D. Garages
Rationale: Dining rooms are not among the areas listed in NEC 210.8 for
required GFCI protection.
4. What is the minimum working space required in front of a 480V
panelboard?
A. 24 inches
B. 36 inches
C. 48 inches
D. 60 inches
Rationale: NEC 110.26(A)(1) requires at least 36 inches of clear working space
for voltages up to 600V.
5. What color is typically used to identify a grounded conductor?
A. Red
B. Blue
C. White
D. Black
Rationale: NEC 200.6 requires white or gray insulation for grounded (neutral)
conductors.
6. How often must flexible metal conduit (FMC) be securely supported?
,A. Every 4 feet
B. Every 4.5 feet
C. Every 6 feet
D. Every 10 feet
Rationale: NEC 348.30(A) requires FMC to be supported every 4.5 feet.
7. The minimum burial depth for direct-buried cables under a driveway is:
A. 12 inches
B. 18 inches
C. 24 inches
D. 30 inches
Rationale: NEC Table 300.5 specifies 18 inches for direct-buried conductors
under driveways.
8. What is the standard voltage of a single-phase residential service?
A. 120V
B. 120/240V
C. 208V
D. 277V
Rationale: Most single-phase residential services are 120/240V.
9. Which wire type is approved for wet locations?
A. THHN
B. THWN-2
C. NM
D. XHH
, Rationale: THWN-2 is approved for wet and dry locations (NEC Table 310.4).
10.A receptacle installed outdoors on a residential dwelling must be:
A. Tamper-resistant only
B. Weatherproof only
C. GFCI-protected and weather-resistant
D. AFCI-protected
Rationale: NEC 406.9(B)(1) requires outdoor outlets to be both GFCI-protected
and weather-resistant.
11.What is the minimum clearance above grade for a service drop over a
residential driveway?
A. 8 feet
B. 10 feet
C. 12 feet
D. 18 feet
Rationale: NEC 230.24(B) requires at least 12 feet of clearance over residential
driveways.
12.What is the ampacity of 12 AWG copper THHN in a raceway at 75°C?
A. 20 amps
B. 25 amps
C. 30 amps
D. 35 amps
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A |
Instant Download Pdf
1. What is the minimum size copper grounding electrode conductor for a 200-
ampere residential service?
A. 6 AWG
B. 4 AWG
C. 2 AWG
D. 1 AWG
Rationale: Per NEC 250.66, for a 200A service, the minimum copper grounding
electrode conductor is 4 AWG.
2. What type of conduit is approved for direct burial without additional
protection?
A. EMT
B. IMC
C. RMC
D. PVC Schedule 80
Rationale: Schedule 80 PVC is rated for direct burial due to its thickness and
durability (NEC 352).
3. In which location is GFCI protection NOT required?
,A. Bathrooms
B. Unfinished basements
C. Dining rooms
D. Garages
Rationale: Dining rooms are not among the areas listed in NEC 210.8 for
required GFCI protection.
4. What is the minimum working space required in front of a 480V
panelboard?
A. 24 inches
B. 36 inches
C. 48 inches
D. 60 inches
Rationale: NEC 110.26(A)(1) requires at least 36 inches of clear working space
for voltages up to 600V.
5. What color is typically used to identify a grounded conductor?
A. Red
B. Blue
C. White
D. Black
Rationale: NEC 200.6 requires white or gray insulation for grounded (neutral)
conductors.
6. How often must flexible metal conduit (FMC) be securely supported?
,A. Every 4 feet
B. Every 4.5 feet
C. Every 6 feet
D. Every 10 feet
Rationale: NEC 348.30(A) requires FMC to be supported every 4.5 feet.
7. The minimum burial depth for direct-buried cables under a driveway is:
A. 12 inches
B. 18 inches
C. 24 inches
D. 30 inches
Rationale: NEC Table 300.5 specifies 18 inches for direct-buried conductors
under driveways.
8. What is the standard voltage of a single-phase residential service?
A. 120V
B. 120/240V
C. 208V
D. 277V
Rationale: Most single-phase residential services are 120/240V.
9. Which wire type is approved for wet locations?
A. THHN
B. THWN-2
C. NM
D. XHH
, Rationale: THWN-2 is approved for wet and dry locations (NEC Table 310.4).
10.A receptacle installed outdoors on a residential dwelling must be:
A. Tamper-resistant only
B. Weatherproof only
C. GFCI-protected and weather-resistant
D. AFCI-protected
Rationale: NEC 406.9(B)(1) requires outdoor outlets to be both GFCI-protected
and weather-resistant.
11.What is the minimum clearance above grade for a service drop over a
residential driveway?
A. 8 feet
B. 10 feet
C. 12 feet
D. 18 feet
Rationale: NEC 230.24(B) requires at least 12 feet of clearance over residential
driveways.
12.What is the ampacity of 12 AWG copper THHN in a raceway at 75°C?
A. 20 amps
B. 25 amps
C. 30 amps
D. 35 amps
