California General Electrician
Certification Exam Questions
And Correct Answers
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Rationales 2025/2026 Q&A |
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1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To provide design specifications only
B. To establish minimum safety standards for electrical installations
C. To regulate utility companies
D. To replace local building codes
Answer: B. To establish minimum safety standards for electrical
installations
Rationale: The NEC provides minimum requirements for safe
electrical installations to protect persons and property from electrical
hazards.
2. Which NEC article covers grounding and bonding?
A. Article 110
B. Article 220
C. Article 250
D. Article 300
,Answer: C. Article 250
Rationale: NEC Article 250 contains requirements for grounding and
bonding electrical systems and equipment.
3. What color insulation is typically used for grounded conductors
rated 6 AWG or smaller?
A. Green
B. Red
C. White or gray
D. Orange
Answer: C. White or gray
Rationale: NEC identifies grounded conductors with white or gray
insulation.
4. What is the minimum working space depth in front of 120/240-
volt equipment under Condition 2?
A. 2 feet
B. 3 feet
C. 3.5 feet
D. 4 feet
Answer: B. 3 feet
Rationale: NEC 110.26 generally requires a minimum working
clearance of 3 feet for many installations under Condition 2.
5. Which conductor is used specifically for equipment grounding?
A. White
B. Gray
,C. Green or bare
D. Red
Answer: C. Green or bare
Rationale: Green-insulated or bare conductors are designated as
equipment grounding conductors.
6. What is the ampacity of a 12 AWG copper conductor under the
60°C column?
A. 15 amps
B. 20 amps
C. 25 amps
D. 30 amps
Answer: B. 20 amps
Rationale: NEC Table 310.16 lists 12 AWG copper at 20 amperes in
the 60°C column.
7. What is the maximum overcurrent protection generally
permitted for 14 AWG copper conductors?
A. 10 amps
B. 15 amps
C. 20 amps
D. 25 amps
Answer: B. 15 amps
Rationale: NEC 240.4(D) limits 14 AWG copper conductors to 15-amp
overcurrent protection.
8. What type of current changes direction periodically?
, A. Direct current
B. Ground current
C. Alternating current
D. Leakage current
Answer: C. Alternating current
Rationale: Alternating current (AC) reverses direction at regular
intervals.
9. According to Ohm's Law, voltage equals:
A. Current × Resistance
B. Current ÷ Resistance
C. Resistance ÷ Current
D. Power × Current
Answer: A. Current × Resistance
Rationale: Ohm's Law is expressed as V = I × R.
10. What is the resistance of a circuit carrying 10 amps at 120 volts?
𝑉 = 𝐼𝑅
𝑉𝑠
V
𝑅
Ω
𝑉𝑠 12.0 V
𝐼= = = 2.00 A
𝑅 6.0 Ω
Vs = 12.0 V+-R = 6.0 ΩI = 2.00 A
A. 6 ohms
B. 10 ohms
Certification Exam Questions
And Correct Answers
(Verified Answers) Plus
Rationales 2025/2026 Q&A |
Instant Download Pdf
1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To provide design specifications only
B. To establish minimum safety standards for electrical installations
C. To regulate utility companies
D. To replace local building codes
Answer: B. To establish minimum safety standards for electrical
installations
Rationale: The NEC provides minimum requirements for safe
electrical installations to protect persons and property from electrical
hazards.
2. Which NEC article covers grounding and bonding?
A. Article 110
B. Article 220
C. Article 250
D. Article 300
,Answer: C. Article 250
Rationale: NEC Article 250 contains requirements for grounding and
bonding electrical systems and equipment.
3. What color insulation is typically used for grounded conductors
rated 6 AWG or smaller?
A. Green
B. Red
C. White or gray
D. Orange
Answer: C. White or gray
Rationale: NEC identifies grounded conductors with white or gray
insulation.
4. What is the minimum working space depth in front of 120/240-
volt equipment under Condition 2?
A. 2 feet
B. 3 feet
C. 3.5 feet
D. 4 feet
Answer: B. 3 feet
Rationale: NEC 110.26 generally requires a minimum working
clearance of 3 feet for many installations under Condition 2.
5. Which conductor is used specifically for equipment grounding?
A. White
B. Gray
,C. Green or bare
D. Red
Answer: C. Green or bare
Rationale: Green-insulated or bare conductors are designated as
equipment grounding conductors.
6. What is the ampacity of a 12 AWG copper conductor under the
60°C column?
A. 15 amps
B. 20 amps
C. 25 amps
D. 30 amps
Answer: B. 20 amps
Rationale: NEC Table 310.16 lists 12 AWG copper at 20 amperes in
the 60°C column.
7. What is the maximum overcurrent protection generally
permitted for 14 AWG copper conductors?
A. 10 amps
B. 15 amps
C. 20 amps
D. 25 amps
Answer: B. 15 amps
Rationale: NEC 240.4(D) limits 14 AWG copper conductors to 15-amp
overcurrent protection.
8. What type of current changes direction periodically?
, A. Direct current
B. Ground current
C. Alternating current
D. Leakage current
Answer: C. Alternating current
Rationale: Alternating current (AC) reverses direction at regular
intervals.
9. According to Ohm's Law, voltage equals:
A. Current × Resistance
B. Current ÷ Resistance
C. Resistance ÷ Current
D. Power × Current
Answer: A. Current × Resistance
Rationale: Ohm's Law is expressed as V = I × R.
10. What is the resistance of a circuit carrying 10 amps at 120 volts?
𝑉 = 𝐼𝑅
𝑉𝑠
V
𝑅
Ω
𝑉𝑠 12.0 V
𝐼= = = 2.00 A
𝑅 6.0 Ω
Vs = 12.0 V+-R = 6.0 ΩI = 2.00 A
A. 6 ohms
B. 10 ohms
