NEVADA C-2 ELECTRICAL CONTRACTOR EXAM– QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED
ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
General Electrical Knowledge
Service, Feeders, and Branch Circuits
Grounding and Bonding
Conductors and Cables
Raceways and Boxes
Special Occupancies and Equipment
Motors, Low Voltage, and Lighting
Nevada Contractor Law and Safety
Introduction
The Nevada C-2 Electrical Contractor examination is designed to assess the competency of individuals seeking licensure
to perform electrical contracting work within the state. This assessment evaluates a candidate's mastery of the National
Electrical Code (NEC), Nevada Administrative Code (NAC), and practical electrical theory. The exam utilizes both
multiple-choice questions and scenario-based problems to ensure candidates can apply their knowledge to real-world
,situations. Emphasis is placed on critical decision-making, safety compliance, and regulatory adherence, ensuring that
licensed contractors possess the skills necessary to manage electrical projects safely and legally.
SECTION ONE: QUESTIONS 1–50
1. What is the primary function of a rectifier in an electrical circuit?
A. Convert DC to AC
B. Convert AC to DC
C. Increase voltage levels
D. Store electrical energy
🟢 Correct Answer: B. Convert AC to DC
🔴 Explanation: A rectifier is an electrical device that converts alternating current (AC), which periodically reverses
direction, into direct current (DC), which flows in only one direction. This is essential for powering DC equipment
from standard AC supplies .
2. When calculating the fill for a 3/4-inch electrical metallic tubing (EMT) run, what is the maximum number of 12
AWG conductors permitted?
,A. 4
B. 5
C. 7
D. 8
🟢 Correct Answer: C. 7
🔴 Explanation: According to NEC Chapter 9, Table 1 and Table 4, a 3/4-inch EMT raceway has a total internal area
that allows for a maximum of 7 conductors of 12 AWG size, based on a 40% conduit fill allowance .
3. Which of the following correctly describes the function of a transformer in an electrical power distribution
system?
A. It protects circuits from overcurrent
B. It changes voltage levels through electromagnetic induction
C. It converts AC power to DC power
D. It provides a low-impedance path for fault current
🟢 Correct Answer: B. It changes voltage levels through electromagnetic induction
🔴 Explanation: Transformers are used to step voltage up or down to meet system or equipment requirements. They
operate on the principle of electromagnetic induction, transferring electrical energy between two or more coils
without a direct electrical connection .
, 4. What is the primary purpose of an Arc-Fault Circuit Interrupter (AFCI)?
A. Prevent overloads on branch circuits
B. Prevent electrical fires caused by arcing conditions
C. Reduce voltage fluctuations
D. Provide a grounding path for equipment
🟢 Correct Answer: B. Prevent electrical fires caused by arcing conditions
🔴 Explanation: AFCIs are designed to detect dangerous arcing conditions in wiring that could ignite surrounding
materials and start a fire. They monitor the waveform of the current and trip the circuit when they sense the
signature of an arc fault .
5. In a single-phase electrical system, what is the correct formula for calculating current (I) when power (P) and
voltage (V) are known?
A. I = V × R
B. I = V ÷ R
C. I = P ÷ V
D. I = P × V
🟢 Correct Answer: C. I = P ÷ V
ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
General Electrical Knowledge
Service, Feeders, and Branch Circuits
Grounding and Bonding
Conductors and Cables
Raceways and Boxes
Special Occupancies and Equipment
Motors, Low Voltage, and Lighting
Nevada Contractor Law and Safety
Introduction
The Nevada C-2 Electrical Contractor examination is designed to assess the competency of individuals seeking licensure
to perform electrical contracting work within the state. This assessment evaluates a candidate's mastery of the National
Electrical Code (NEC), Nevada Administrative Code (NAC), and practical electrical theory. The exam utilizes both
multiple-choice questions and scenario-based problems to ensure candidates can apply their knowledge to real-world
,situations. Emphasis is placed on critical decision-making, safety compliance, and regulatory adherence, ensuring that
licensed contractors possess the skills necessary to manage electrical projects safely and legally.
SECTION ONE: QUESTIONS 1–50
1. What is the primary function of a rectifier in an electrical circuit?
A. Convert DC to AC
B. Convert AC to DC
C. Increase voltage levels
D. Store electrical energy
🟢 Correct Answer: B. Convert AC to DC
🔴 Explanation: A rectifier is an electrical device that converts alternating current (AC), which periodically reverses
direction, into direct current (DC), which flows in only one direction. This is essential for powering DC equipment
from standard AC supplies .
2. When calculating the fill for a 3/4-inch electrical metallic tubing (EMT) run, what is the maximum number of 12
AWG conductors permitted?
,A. 4
B. 5
C. 7
D. 8
🟢 Correct Answer: C. 7
🔴 Explanation: According to NEC Chapter 9, Table 1 and Table 4, a 3/4-inch EMT raceway has a total internal area
that allows for a maximum of 7 conductors of 12 AWG size, based on a 40% conduit fill allowance .
3. Which of the following correctly describes the function of a transformer in an electrical power distribution
system?
A. It protects circuits from overcurrent
B. It changes voltage levels through electromagnetic induction
C. It converts AC power to DC power
D. It provides a low-impedance path for fault current
🟢 Correct Answer: B. It changes voltage levels through electromagnetic induction
🔴 Explanation: Transformers are used to step voltage up or down to meet system or equipment requirements. They
operate on the principle of electromagnetic induction, transferring electrical energy between two or more coils
without a direct electrical connection .
, 4. What is the primary purpose of an Arc-Fault Circuit Interrupter (AFCI)?
A. Prevent overloads on branch circuits
B. Prevent electrical fires caused by arcing conditions
C. Reduce voltage fluctuations
D. Provide a grounding path for equipment
🟢 Correct Answer: B. Prevent electrical fires caused by arcing conditions
🔴 Explanation: AFCIs are designed to detect dangerous arcing conditions in wiring that could ignite surrounding
materials and start a fire. They monitor the waveform of the current and trip the circuit when they sense the
signature of an arc fault .
5. In a single-phase electrical system, what is the correct formula for calculating current (I) when power (P) and
voltage (V) are known?
A. I = V × R
B. I = V ÷ R
C. I = P ÷ V
D. I = P × V
🟢 Correct Answer: C. I = P ÷ V
