CALIFORNIA C-10 ELECTRICAL CONTRACTOR EXAM NEWEST 2026
UPDATE FAST REVIWED FROM ACTUAL TEST 100 QUESTIONS AND
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1. What is the primary purpose of the National Electrical Code (NEC)?
A. To provide design guidelines
B. To ensure electrical safety
C. To reduce construction costs
D. To standardize materials
B. To ensure electrical safety
The NEC is intended to safeguard people and property from electrical
hazards.
2. What does NEC Article 110 cover?
A. Wiring methods
B. Grounding
C. General requirements for electrical installations
D. Motors
C. General requirements for electrical installations
Article 110 outlines basic installation and inspection requirements.
3. What is the minimum burial depth for direct burial cable under residential
driveways?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
C. 18 inches
The NEC specifies minimum burial depths to protect cables from damage.
4. What type of current is typically used in residential homes?
A. Direct current
B. Alternating current
, C. Pulsating current
D. Static current
B. Alternating current
Homes use AC because it is efficient for transmission.
5. What is the standard voltage for most residential outlets in California?
A. 110V
B. 120V
C. 220V
D. 240V
B. 120V
Standard outlets provide 120 volts for general use.
6. What device protects against overcurrent?
A. Transformer
B. Circuit breaker
C. Capacitor
D. Relay
B. Circuit breaker
Circuit breakers interrupt current flow during overloads or short circuits.
7. What is the purpose of grounding?
A. Increase voltage
B. Stabilize frequency
C. Provide a safe path for fault current
D. Reduce resistance
C. Provide a safe path for fault current
Grounding prevents shock and equipment damage.
8. What does GFCI stand for?
A. Ground Fault Circuit Interrupter
B. General Fault Current Indicator
C. Ground Flow Control Instrument
D. Grid Fault Circuit Isolator
, A. Ground Fault Circuit Interrupter
GFCIs protect against electric shock by detecting ground faults.
9. Where are GFCIs required?
A. Bedrooms
B. Living rooms
C. Bathrooms
D. Closets
C. Bathrooms
Wet areas require GFCI protection due to higher shock risk.
10.What is the ampacity of a 12 AWG copper conductor?
A. 15 amps
B. 20 amps
C. 25 amps
D. 30 amps
B. 20 amps
12 AWG wire is rated for 20 amps under normal conditions.
11.What does AWG stand for?
A. American Wire Gauge
B. Alternating Watt Grid
C. Ampere Wiring Guide
D. Approved Wire Grade
A. American Wire Gauge
AWG is the standard for wire sizing.
12.What color is typically used for neutral wires?
A. Black
B. Red
C. White
D. Green
C. White
White or gray indicates neutral conductors.
UPDATE FAST REVIWED FROM ACTUAL TEST 100 QUESTIONS AND
100% VERIFIED ANSWERS| A+ GRADE Q&A | INSTANT DOWNLOAD
1. What is the primary purpose of the National Electrical Code (NEC)?
A. To provide design guidelines
B. To ensure electrical safety
C. To reduce construction costs
D. To standardize materials
B. To ensure electrical safety
The NEC is intended to safeguard people and property from electrical
hazards.
2. What does NEC Article 110 cover?
A. Wiring methods
B. Grounding
C. General requirements for electrical installations
D. Motors
C. General requirements for electrical installations
Article 110 outlines basic installation and inspection requirements.
3. What is the minimum burial depth for direct burial cable under residential
driveways?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
C. 18 inches
The NEC specifies minimum burial depths to protect cables from damage.
4. What type of current is typically used in residential homes?
A. Direct current
B. Alternating current
, C. Pulsating current
D. Static current
B. Alternating current
Homes use AC because it is efficient for transmission.
5. What is the standard voltage for most residential outlets in California?
A. 110V
B. 120V
C. 220V
D. 240V
B. 120V
Standard outlets provide 120 volts for general use.
6. What device protects against overcurrent?
A. Transformer
B. Circuit breaker
C. Capacitor
D. Relay
B. Circuit breaker
Circuit breakers interrupt current flow during overloads or short circuits.
7. What is the purpose of grounding?
A. Increase voltage
B. Stabilize frequency
C. Provide a safe path for fault current
D. Reduce resistance
C. Provide a safe path for fault current
Grounding prevents shock and equipment damage.
8. What does GFCI stand for?
A. Ground Fault Circuit Interrupter
B. General Fault Current Indicator
C. Ground Flow Control Instrument
D. Grid Fault Circuit Isolator
, A. Ground Fault Circuit Interrupter
GFCIs protect against electric shock by detecting ground faults.
9. Where are GFCIs required?
A. Bedrooms
B. Living rooms
C. Bathrooms
D. Closets
C. Bathrooms
Wet areas require GFCI protection due to higher shock risk.
10.What is the ampacity of a 12 AWG copper conductor?
A. 15 amps
B. 20 amps
C. 25 amps
D. 30 amps
B. 20 amps
12 AWG wire is rated for 20 amps under normal conditions.
11.What does AWG stand for?
A. American Wire Gauge
B. Alternating Watt Grid
C. Ampere Wiring Guide
D. Approved Wire Grade
A. American Wire Gauge
AWG is the standard for wire sizing.
12.What color is typically used for neutral wires?
A. Black
B. Red
C. White
D. Green
C. White
White or gray indicates neutral conductors.
