Nevada C-2 Electrical
Contractor Exam Prep: 2026
Q&A, Verified Answers &
Rationales (Instant PDF
Download)
Question 1
Which Nevada license classification generally covers electrical
contracting work?
A. C-1
B. C-2
C. C-3
D. C-4
Answer: B. C-2
Rationale: Nevada classifies electrical contracting under the C-2 license
category, which authorizes electrical installation and related work.
Question 2
What is the primary purpose of grounding electrical systems?
A. Increase voltage
B. Improve lighting output
,C. Provide a safe path for fault current
D. Reduce conductor length
Answer: C. Provide a safe path for fault current
Rationale: Grounding helps protect people and equipment by providing
a low-resistance path for fault current.
Question 3
A continuous load should not exceed what percentage of a circuit
breaker’s rating?
A. 50%
B. 60%
C. 80%
D. 100%
Answer: C. 80%
Rationale: NEC requirements generally limit continuous loads to 80% of
an overcurrent device's rating.
Question 4
What is the formula for calculating electrical power?
A. P = I ÷ V
B. P = V × I
C. P = V ÷ I
D. P = I² ÷ R
Answer: B. P = V × I
,Rationale: Electrical power is determined by multiplying voltage by
current.
Question 5
What device protects a motor from overload conditions?
A. Transformer
B. Disconnect switch
C. Overload relay
D. Ground rod
Answer: C. Overload relay
Rationale: Overload relays protect motors from excessive current that
can cause overheating.
Question 6
A grounded conductor is typically identified by which color?
A. Green
B. Red
C. White or Gray
D. Orange
Answer: C. White or Gray
Rationale: NEC standards require grounded conductors to be identified
by white or gray insulation.
Question 7
, What is the purpose of bonding?
A. Reduce conductor size
B. Ensure electrical continuity of conductive parts
C. Increase voltage
D. Reduce ampacity
Answer: B. Ensure electrical continuity of conductive parts
Rationale: Bonding creates an effective fault-current path and minimizes
shock hazards.
Question 8
A 20-amp breaker serving a continuous load should not carry more than:
A. 20 amps
B. 18 amps
C. 16 amps
D. 14 amps
Answer: C. 16 amps
Rationale: Eighty percent of 20 amps equals 16 amps.
Question 9
What is the primary function of a transformer?
A. Store electrical energy
B. Change voltage levels
C. Measure current
D. Control frequency
Contractor Exam Prep: 2026
Q&A, Verified Answers &
Rationales (Instant PDF
Download)
Question 1
Which Nevada license classification generally covers electrical
contracting work?
A. C-1
B. C-2
C. C-3
D. C-4
Answer: B. C-2
Rationale: Nevada classifies electrical contracting under the C-2 license
category, which authorizes electrical installation and related work.
Question 2
What is the primary purpose of grounding electrical systems?
A. Increase voltage
B. Improve lighting output
,C. Provide a safe path for fault current
D. Reduce conductor length
Answer: C. Provide a safe path for fault current
Rationale: Grounding helps protect people and equipment by providing
a low-resistance path for fault current.
Question 3
A continuous load should not exceed what percentage of a circuit
breaker’s rating?
A. 50%
B. 60%
C. 80%
D. 100%
Answer: C. 80%
Rationale: NEC requirements generally limit continuous loads to 80% of
an overcurrent device's rating.
Question 4
What is the formula for calculating electrical power?
A. P = I ÷ V
B. P = V × I
C. P = V ÷ I
D. P = I² ÷ R
Answer: B. P = V × I
,Rationale: Electrical power is determined by multiplying voltage by
current.
Question 5
What device protects a motor from overload conditions?
A. Transformer
B. Disconnect switch
C. Overload relay
D. Ground rod
Answer: C. Overload relay
Rationale: Overload relays protect motors from excessive current that
can cause overheating.
Question 6
A grounded conductor is typically identified by which color?
A. Green
B. Red
C. White or Gray
D. Orange
Answer: C. White or Gray
Rationale: NEC standards require grounded conductors to be identified
by white or gray insulation.
Question 7
, What is the purpose of bonding?
A. Reduce conductor size
B. Ensure electrical continuity of conductive parts
C. Increase voltage
D. Reduce ampacity
Answer: B. Ensure electrical continuity of conductive parts
Rationale: Bonding creates an effective fault-current path and minimizes
shock hazards.
Question 8
A 20-amp breaker serving a continuous load should not carry more than:
A. 20 amps
B. 18 amps
C. 16 amps
D. 14 amps
Answer: C. 16 amps
Rationale: Eighty percent of 20 amps equals 16 amps.
Question 9
What is the primary function of a transformer?
A. Store electrical energy
B. Change voltage levels
C. Measure current
D. Control frequency
