Wisconsin Master Electrician
Residential Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which NEC article contains the general requirements for grounding
and bonding?
A. Article 250
B. Article 300
C. Article 310
D. Article 430
Answer: A. Article 250
Rationale: Article 250 establishes the requirements for grounding,
bonding, grounding electrodes, grounding conductors, and equipment
grounding to protect persons and property.
, 2. The minimum working space depth for equipment operating at 0–150
volts to ground under Condition 1 is:
A. 24 inches
B. 36 inches
C. 42 inches
D. 48 inches
Rationale: NEC 110.26(A)(1) requires a minimum clear working depth of 36
inches under Condition 1 for equipment rated 0–150 volts to ground.
3. A branch circuit supplying only one utilization equipment is called a:
A. General-purpose circuit
B. Multiwire branch circuit
C. Individual branch circuit
D. Feeder
Rationale: An individual branch circuit supplies only one utilization
equipment according to NEC Article 100 definitions.
4. What is the maximum overcurrent protection permitted for 14 AWG
copper conductors in most residential branch circuits?
A. 15 amperes
B. 20 amperes
C. 25 amperes
D. 30 amperes
,Rationale: NEC 240.4(D) limits 14 AWG copper conductors to 15-amp
overcurrent protection except where specifically permitted.
5. Kitchen countertop receptacles in dwelling units require:
A. AFCI protection only
B. GFCI protection
C. Weather-resistant construction
D. Twist-lock configuration
Rationale: NEC 210.8 requires GFCI protection for receptacles serving
kitchen countertop surfaces.
6. AFCI protection is generally required for:
A. Outdoor receptacles
B. Detached garages only
C. Most 120-volt, 15- and 20-amp dwelling unit branch circuits
D. Service conductors
Rationale: NEC 210.12 requires AFCI protection for many dwelling unit
branch circuits serving living spaces.
7. The grounded conductor is commonly identified by:
A. Green insulation
B. Red insulation
, C. White or gray insulation
D. Orange insulation
Rationale: NEC 200.6 specifies white or gray identification for grounded
conductors.
8. Which conductor is normally bonded to metal enclosures?
A. Grounded conductor
B. Ungrounded conductor
C. Equipment grounding conductor
D. Traveler conductor
Rationale: The equipment grounding conductor provides a low-impedance
fault path and bonds non-current-carrying metal parts.
9. A residential bathroom receptacle circuit must be rated at least:
A. 15 amperes
B. 20 amperes
C. 25 amperes
D. 30 amperes
Rationale: NEC 210.11(C)(3) requires at least one 20-amp bathroom branch
circuit.
10. Which NEC article covers branch circuits?
Residential Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which NEC article contains the general requirements for grounding
and bonding?
A. Article 250
B. Article 300
C. Article 310
D. Article 430
Answer: A. Article 250
Rationale: Article 250 establishes the requirements for grounding,
bonding, grounding electrodes, grounding conductors, and equipment
grounding to protect persons and property.
, 2. The minimum working space depth for equipment operating at 0–150
volts to ground under Condition 1 is:
A. 24 inches
B. 36 inches
C. 42 inches
D. 48 inches
Rationale: NEC 110.26(A)(1) requires a minimum clear working depth of 36
inches under Condition 1 for equipment rated 0–150 volts to ground.
3. A branch circuit supplying only one utilization equipment is called a:
A. General-purpose circuit
B. Multiwire branch circuit
C. Individual branch circuit
D. Feeder
Rationale: An individual branch circuit supplies only one utilization
equipment according to NEC Article 100 definitions.
4. What is the maximum overcurrent protection permitted for 14 AWG
copper conductors in most residential branch circuits?
A. 15 amperes
B. 20 amperes
C. 25 amperes
D. 30 amperes
,Rationale: NEC 240.4(D) limits 14 AWG copper conductors to 15-amp
overcurrent protection except where specifically permitted.
5. Kitchen countertop receptacles in dwelling units require:
A. AFCI protection only
B. GFCI protection
C. Weather-resistant construction
D. Twist-lock configuration
Rationale: NEC 210.8 requires GFCI protection for receptacles serving
kitchen countertop surfaces.
6. AFCI protection is generally required for:
A. Outdoor receptacles
B. Detached garages only
C. Most 120-volt, 15- and 20-amp dwelling unit branch circuits
D. Service conductors
Rationale: NEC 210.12 requires AFCI protection for many dwelling unit
branch circuits serving living spaces.
7. The grounded conductor is commonly identified by:
A. Green insulation
B. Red insulation
, C. White or gray insulation
D. Orange insulation
Rationale: NEC 200.6 specifies white or gray identification for grounded
conductors.
8. Which conductor is normally bonded to metal enclosures?
A. Grounded conductor
B. Ungrounded conductor
C. Equipment grounding conductor
D. Traveler conductor
Rationale: The equipment grounding conductor provides a low-impedance
fault path and bonds non-current-carrying metal parts.
9. A residential bathroom receptacle circuit must be rated at least:
A. 15 amperes
B. 20 amperes
C. 25 amperes
D. 30 amperes
Rationale: NEC 210.11(C)(3) requires at least one 20-amp bathroom branch
circuit.
10. Which NEC article covers branch circuits?
