Wisconsin Registered Electrician Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of the National Electrical Code (NEC)?
A. Reduce construction costs
B. Establish minimum safety requirements for electrical installations
C. Increase electrical efficiency only
D. Eliminate all electrical hazards
Answer: B. Establish minimum safety requirements for electrical
installations
Rationale: The NEC establishes minimum standards for safe electrical
design, installation, and inspection to protect people and property from
electrical hazards.
2. What is considered a continuous load according to the NEC?
A. A load operating for 1 hour or more
B. A load operating for 2 hours or more
C. A load operating for 3 hours or more
D. A load operating intermittently
,Answer: C. A load operating for 3 hours or more
Rationale: The NEC defines a continuous load as one expected to operate
at maximum current for three hours or more.
3. What is the minimum ampacity requirement for branch-circuit
conductors supplying a continuous load?
A. 100% of the load
B. 125% of the continuous load
C. 150% of the continuous load
D. 110% of the continuous load
Rationale: Conductors supplying continuous loads must be sized for at
least 125% of the continuous load to prevent overheating.
4. Which conductor is intentionally connected to earth?
A. Equipment grounding conductor
B. Bonding jumper
C. Grounded conductor
D. Traveler conductor
Rationale: The grounded conductor, commonly called the neutral, is
intentionally connected to earth at the service.
5. Which instrument measures electrical resistance?
,A. Ammeter
B. Voltmeter
C. Wattmeter
D. Ohmmeter
Rationale: An ohmmeter measures resistance in ohms and is used only on
de-energized circuits.
6. What does Ohm's Law state?
A. P = EI
B. E = P/I
C. E = IR
D. I = PR
Rationale: Ohm's Law states that voltage equals current multiplied by
resistance.
7. What is the unit of electrical power?
A. Volt
B. Ampere
C. Ohm
D. Watt
Rationale: Electrical power is measured in watts and equals volts
multiplied by amperes.
, 8. A 120-volt circuit draws 10 amperes. What is the power consumption?
A. 100 watts
B. 600 watts
C. 1,200 watts
D. 2,400 watts
Rationale: Power equals voltage multiplied by current: 120 × 10 = 1,200
watts.
9. What color is typically used for equipment grounding conductors?
A. Black
B. White
C. Red
D. Green or bare
Rationale: Equipment grounding conductors are identified by green
insulation or bare copper.
10. Which NEC chapter covers wiring methods?
A. Chapter 1
B. Chapter 2
C. Chapter 3
D. Chapter 5
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of the National Electrical Code (NEC)?
A. Reduce construction costs
B. Establish minimum safety requirements for electrical installations
C. Increase electrical efficiency only
D. Eliminate all electrical hazards
Answer: B. Establish minimum safety requirements for electrical
installations
Rationale: The NEC establishes minimum standards for safe electrical
design, installation, and inspection to protect people and property from
electrical hazards.
2. What is considered a continuous load according to the NEC?
A. A load operating for 1 hour or more
B. A load operating for 2 hours or more
C. A load operating for 3 hours or more
D. A load operating intermittently
,Answer: C. A load operating for 3 hours or more
Rationale: The NEC defines a continuous load as one expected to operate
at maximum current for three hours or more.
3. What is the minimum ampacity requirement for branch-circuit
conductors supplying a continuous load?
A. 100% of the load
B. 125% of the continuous load
C. 150% of the continuous load
D. 110% of the continuous load
Rationale: Conductors supplying continuous loads must be sized for at
least 125% of the continuous load to prevent overheating.
4. Which conductor is intentionally connected to earth?
A. Equipment grounding conductor
B. Bonding jumper
C. Grounded conductor
D. Traveler conductor
Rationale: The grounded conductor, commonly called the neutral, is
intentionally connected to earth at the service.
5. Which instrument measures electrical resistance?
,A. Ammeter
B. Voltmeter
C. Wattmeter
D. Ohmmeter
Rationale: An ohmmeter measures resistance in ohms and is used only on
de-energized circuits.
6. What does Ohm's Law state?
A. P = EI
B. E = P/I
C. E = IR
D. I = PR
Rationale: Ohm's Law states that voltage equals current multiplied by
resistance.
7. What is the unit of electrical power?
A. Volt
B. Ampere
C. Ohm
D. Watt
Rationale: Electrical power is measured in watts and equals volts
multiplied by amperes.
, 8. A 120-volt circuit draws 10 amperes. What is the power consumption?
A. 100 watts
B. 600 watts
C. 1,200 watts
D. 2,400 watts
Rationale: Power equals voltage multiplied by current: 120 × 10 = 1,200
watts.
9. What color is typically used for equipment grounding conductors?
A. Black
B. White
C. Red
D. Green or bare
Rationale: Equipment grounding conductors are identified by green
insulation or bare copper.
10. Which NEC chapter covers wiring methods?
A. Chapter 1
B. Chapter 2
C. Chapter 3
D. Chapter 5
