California General Electrician Certification Practice
Exam PRACTICE QUESTIONS AND VERIFIED
ANSWERS 2026 Q&A |INSTANT DOWNLOAD PDF
1. Which of the following conductors is most suitable for a wet
location?
A) NM (Nonmetallic-sheathed) cable
B) UF (Underground Feeder) cable
C) MC (Metal-clad) cable
D) SE (Service Entrance) cable
Correct Answer: B) UF (Underground Feeder) cable
Rationale: UF cable is designed for wet locations as it has a moisture-
resistant sheath and is suitable for direct burial.
2. What is the maximum allowable voltage drop for branch circuits in
a commercial building?
A) 2%
B) 3%
C) 5%
D) 10%
Correct Answer: B) 3%
Rationale: NEC recommends a maximum of 3% voltage drop for branch
circuits to ensure proper appliance operation and efficiency.
3. When grounding a service panel, which of the following is required?
,A) Grounding electrode conductor connected to a water pipe
B) Only metallic conduit
C) Plastic raceway only
D) Grounding is optional
Correct Answer: A) Grounding electrode conductor connected to a water
pipe
Rationale: NEC requires the service panel to be grounded to a grounding
electrode such as a metal water pipe or ground rod.
4. What type of overcurrent protection is required for a 20-amp
branch circuit?
A) 15-amp breaker
B) 20-amp breaker
C) 30-amp breaker
D) No breaker needed
Correct Answer: B) 20-amp breaker
Rationale: Branch circuit overcurrent protection must match the circuit
ampacity to prevent overheating and fires.
5. Which conduit type is suitable for outdoor direct sunlight
exposure?
A) PVC Schedule 40
B) EMT (Electrical Metallic Tubing)
C) Flexible Metal Conduit (FMC)
D) ENT (Electrical Nonmetallic Tubing)
,Correct Answer: A) PVC Schedule 40
Rationale: PVC Schedule 40 conduit is sunlight-resistant and suitable for
outdoor installations.
6. The purpose of a GFCI is to:
A) Protect against overcurrent
B) Protect against electrical shock
C) Increase voltage
D) Reduce energy consumption
Correct Answer: B) Protect against electrical shock
Rationale: Ground-Fault Circuit Interrupters (GFCI) detect leakage
currents and quickly disconnect power to prevent shock hazards.
7. What color is used for an equipment grounding conductor?
A) White
B) Black
C) Green or bare
D) Red
Correct Answer: C) Green or bare
Rationale: NEC requires equipment grounding conductors to be either
green or bare to differentiate them from hot or neutral conductors.
8. Which of the following is a correct method to splice copper wires?
A) Twist wires together and tape
B) Use a wire nut or approved connector
, C) Solder only
D) Leave ends touching
Correct Answer: B) Use a wire nut or approved connector
Rationale: NEC requires mechanical connectors such as wire nuts for
secure, code-compliant splices.
9. How far apart should receptacles be installed in a residential living
room along the wall?
A) Every 4 feet
B) Every 6 feet
C) Every 12 feet
D) Every 10 feet
Correct Answer: D) Every 10 feet
Rationale: NEC requires receptacles no more than 12 feet apart;
practically, spacing every 10 feet ensures coverage for furniture
placement.
10. A 240-volt branch circuit must have:
A) One hot wire
B) Two hot wires and a neutral
C) Two hot wires and a ground
D) One hot, one neutral, one ground
Correct Answer: C) Two hot wires and a ground
Rationale: A 240V circuit typically uses two hots and a ground; neutral is
only needed if 120V devices are included.
Exam PRACTICE QUESTIONS AND VERIFIED
ANSWERS 2026 Q&A |INSTANT DOWNLOAD PDF
1. Which of the following conductors is most suitable for a wet
location?
A) NM (Nonmetallic-sheathed) cable
B) UF (Underground Feeder) cable
C) MC (Metal-clad) cable
D) SE (Service Entrance) cable
Correct Answer: B) UF (Underground Feeder) cable
Rationale: UF cable is designed for wet locations as it has a moisture-
resistant sheath and is suitable for direct burial.
2. What is the maximum allowable voltage drop for branch circuits in
a commercial building?
A) 2%
B) 3%
C) 5%
D) 10%
Correct Answer: B) 3%
Rationale: NEC recommends a maximum of 3% voltage drop for branch
circuits to ensure proper appliance operation and efficiency.
3. When grounding a service panel, which of the following is required?
,A) Grounding electrode conductor connected to a water pipe
B) Only metallic conduit
C) Plastic raceway only
D) Grounding is optional
Correct Answer: A) Grounding electrode conductor connected to a water
pipe
Rationale: NEC requires the service panel to be grounded to a grounding
electrode such as a metal water pipe or ground rod.
4. What type of overcurrent protection is required for a 20-amp
branch circuit?
A) 15-amp breaker
B) 20-amp breaker
C) 30-amp breaker
D) No breaker needed
Correct Answer: B) 20-amp breaker
Rationale: Branch circuit overcurrent protection must match the circuit
ampacity to prevent overheating and fires.
5. Which conduit type is suitable for outdoor direct sunlight
exposure?
A) PVC Schedule 40
B) EMT (Electrical Metallic Tubing)
C) Flexible Metal Conduit (FMC)
D) ENT (Electrical Nonmetallic Tubing)
,Correct Answer: A) PVC Schedule 40
Rationale: PVC Schedule 40 conduit is sunlight-resistant and suitable for
outdoor installations.
6. The purpose of a GFCI is to:
A) Protect against overcurrent
B) Protect against electrical shock
C) Increase voltage
D) Reduce energy consumption
Correct Answer: B) Protect against electrical shock
Rationale: Ground-Fault Circuit Interrupters (GFCI) detect leakage
currents and quickly disconnect power to prevent shock hazards.
7. What color is used for an equipment grounding conductor?
A) White
B) Black
C) Green or bare
D) Red
Correct Answer: C) Green or bare
Rationale: NEC requires equipment grounding conductors to be either
green or bare to differentiate them from hot or neutral conductors.
8. Which of the following is a correct method to splice copper wires?
A) Twist wires together and tape
B) Use a wire nut or approved connector
, C) Solder only
D) Leave ends touching
Correct Answer: B) Use a wire nut or approved connector
Rationale: NEC requires mechanical connectors such as wire nuts for
secure, code-compliant splices.
9. How far apart should receptacles be installed in a residential living
room along the wall?
A) Every 4 feet
B) Every 6 feet
C) Every 12 feet
D) Every 10 feet
Correct Answer: D) Every 10 feet
Rationale: NEC requires receptacles no more than 12 feet apart;
practically, spacing every 10 feet ensures coverage for furniture
placement.
10. A 240-volt branch circuit must have:
A) One hot wire
B) Two hot wires and a neutral
C) Two hot wires and a ground
D) One hot, one neutral, one ground
Correct Answer: C) Two hot wires and a ground
Rationale: A 240V circuit typically uses two hots and a ground; neutral is
only needed if 120V devices are included.
