Wisconsin Registered Electrician Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which organization publishes the National Electrical Code (NEC)?
A. OSHA
B. IEEE
C. NFPA
D. ANSI
Answer: C. NFPA
Rationale: The National Fire Protection Association (NFPA) develops and
publishes the NEC, which establishes minimum safety standards for
electrical installations.
2. The primary purpose of grounding is to:
A. Increase voltage
B. Improve lighting
, C. Reduce shock hazards by providing a fault current path
D. Increase conductor resistance
Answer: C. Reduce shock hazards by providing a fault current path
Rationale: Grounding provides a low-impedance path for fault current,
helping protective devices operate quickly and reducing electrical shock
hazards.
3. A registered electrician in Wisconsin must generally work:
A. Independently at all times
B. Without permits
C. Under the direct supervision of an appropriately licensed
electrician
D. Only on commercial projects
Answer: C. Under the direct supervision of an appropriately licensed
electrician
Rationale: _Wisconsin regulations require registered electricians to
perform electrical wiring under the supervision of an appropriately
licensed electrician. This is established in Wisconsin administrative rules.*
4. What color insulation is typically used for grounded (neutral)
conductors?
A. Green
, B. Red
C. White or gray
D. Orange
Answer: C. White or gray
Rationale: The NEC identifies white or gray as the standard colors for
grounded (neutral) conductors.
5. Equipment grounding conductors are intended to:
A. Carry normal load current
B. Increase circuit voltage
C. Carry fault current
D. Reduce conductor ampacity
Answer: C. Carry fault current
Rationale: Equipment grounding conductors normally carry no current and
conduct only fault current during abnormal conditions.
6. Ohm's Law states:
A. Power = Voltage × Current
B. Voltage = Current × Resistance
C. Resistance = Voltage × Power
D. Current = Voltage × Power
Answer: B. Voltage = Current × Resistance
, Rationale: Ohm's Law is expressed as V = I × R and is fundamental to
electrical calculations.
7. Which instrument measures current?
A. Voltmeter
B. Ohmmeter
C. Wattmeter
D. Ammeter
Answer: D. Ammeter
Rationale: An ammeter measures electrical current and is connected in
series with the circuit.
8. Before working on electrical equipment, the first priority is to:
A. Wear gloves
B. Test voltage only
C. De-energize and verify absence of voltage
D. Replace fuses
Answer: C. De-energize and verify absence of voltage
Rationale: Electrical safety procedures require establishing an electrically
safe work condition before beginning work.
9. The unit of electrical resistance is:
A. Volt
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which organization publishes the National Electrical Code (NEC)?
A. OSHA
B. IEEE
C. NFPA
D. ANSI
Answer: C. NFPA
Rationale: The National Fire Protection Association (NFPA) develops and
publishes the NEC, which establishes minimum safety standards for
electrical installations.
2. The primary purpose of grounding is to:
A. Increase voltage
B. Improve lighting
, C. Reduce shock hazards by providing a fault current path
D. Increase conductor resistance
Answer: C. Reduce shock hazards by providing a fault current path
Rationale: Grounding provides a low-impedance path for fault current,
helping protective devices operate quickly and reducing electrical shock
hazards.
3. A registered electrician in Wisconsin must generally work:
A. Independently at all times
B. Without permits
C. Under the direct supervision of an appropriately licensed
electrician
D. Only on commercial projects
Answer: C. Under the direct supervision of an appropriately licensed
electrician
Rationale: _Wisconsin regulations require registered electricians to
perform electrical wiring under the supervision of an appropriately
licensed electrician. This is established in Wisconsin administrative rules.*
4. What color insulation is typically used for grounded (neutral)
conductors?
A. Green
, B. Red
C. White or gray
D. Orange
Answer: C. White or gray
Rationale: The NEC identifies white or gray as the standard colors for
grounded (neutral) conductors.
5. Equipment grounding conductors are intended to:
A. Carry normal load current
B. Increase circuit voltage
C. Carry fault current
D. Reduce conductor ampacity
Answer: C. Carry fault current
Rationale: Equipment grounding conductors normally carry no current and
conduct only fault current during abnormal conditions.
6. Ohm's Law states:
A. Power = Voltage × Current
B. Voltage = Current × Resistance
C. Resistance = Voltage × Power
D. Current = Voltage × Power
Answer: B. Voltage = Current × Resistance
, Rationale: Ohm's Law is expressed as V = I × R and is fundamental to
electrical calculations.
7. Which instrument measures current?
A. Voltmeter
B. Ohmmeter
C. Wattmeter
D. Ammeter
Answer: D. Ammeter
Rationale: An ammeter measures electrical current and is connected in
series with the circuit.
8. Before working on electrical equipment, the first priority is to:
A. Wear gloves
B. Test voltage only
C. De-energize and verify absence of voltage
D. Replace fuses
Answer: C. De-energize and verify absence of voltage
Rationale: Electrical safety procedures require establishing an electrically
safe work condition before beginning work.
9. The unit of electrical resistance is:
A. Volt
