NORTH CAROLINA RESIDENTIAL
SINGLE-FAMILY DWELLING
ELECTRICAL CONTRACTOR
LICENSING PRACTICE EXAM
QUESTIONS AND CORRECT ANSWERS
WITH EXPLANATIONS
1. According to the NEC Table 310.12, what is the minimum size Copper THW conductor
required for a 200-ampere, single-phase, 120/240-volt residential service entrance?
A. 1/0 AWG
B. 4/0 AWG
C. 3/0 AWG
D. 2/0 AWG
Answer: D
Conceptual Explanation: Per Table 310.12, for a 200A residential service, 2/0 AWG
Copper or 4/0 AWG Aluminum is required.
2. What is the minimum number of 20-ampere small-appliance branch circuits required for a
dwelling unit’s kitchen area?
A. One
,B. Two
C. Three
D. Four
Answer: B
Conceptual Explanation: NEC 210.11(C)(1) requires at least two 20-ampere small-
appliance branch circuits for the kitchen countertop and dining areas.
3. In a dwelling unit, a receptacle must be installed so that no point measured horizontally
along the floor line in any wall space is more than how many feet from a receptacle outlet?
A. 6 feet
B. 4 feet
C. 10 feet
D. 12 feet
Answer: A
Conceptual Explanation: NEC 210.52(A)(1) states that receptacles shall be installed so
that no point along the floor line is more than 6 feet from an outlet (the ‘12-foot rule’).
4. Which of the following locations in a residential dwelling does NOT require AFCI protection
under the NEC 210.12?
A. Bedrooms
B. Living rooms
, C. Bathrooms
D. Hallways
Answer: C
Conceptual Explanation: While bedrooms, living rooms, and hallways require AFCI,
bathrooms (and garages/unfinished basements in some versions) are typically excluded
from AFCI requirements, though they require GFCI.
5. What is the maximum distance a laundry receptacle can be from the laundry equipment?
A. 3 feet
B. 6 feet
C. 8 feet
D. There is no maximum distance
Answer: B
Conceptual Explanation: NEC 210.50(C) requires the receptacle for a specific appliance to
be within 6 feet of the intended location of the appliance.
6. A 120-volt, 20-ampere branch circuit supplies a single bathroom. Can this circuit supply
lighting in the same bathroom?
A. Yes, but only if the lighting is GFCI protected.
B. No, it must only supply receptacles.
C. Yes, if the circuit supplies no other rooms.
SINGLE-FAMILY DWELLING
ELECTRICAL CONTRACTOR
LICENSING PRACTICE EXAM
QUESTIONS AND CORRECT ANSWERS
WITH EXPLANATIONS
1. According to the NEC Table 310.12, what is the minimum size Copper THW conductor
required for a 200-ampere, single-phase, 120/240-volt residential service entrance?
A. 1/0 AWG
B. 4/0 AWG
C. 3/0 AWG
D. 2/0 AWG
Answer: D
Conceptual Explanation: Per Table 310.12, for a 200A residential service, 2/0 AWG
Copper or 4/0 AWG Aluminum is required.
2. What is the minimum number of 20-ampere small-appliance branch circuits required for a
dwelling unit’s kitchen area?
A. One
,B. Two
C. Three
D. Four
Answer: B
Conceptual Explanation: NEC 210.11(C)(1) requires at least two 20-ampere small-
appliance branch circuits for the kitchen countertop and dining areas.
3. In a dwelling unit, a receptacle must be installed so that no point measured horizontally
along the floor line in any wall space is more than how many feet from a receptacle outlet?
A. 6 feet
B. 4 feet
C. 10 feet
D. 12 feet
Answer: A
Conceptual Explanation: NEC 210.52(A)(1) states that receptacles shall be installed so
that no point along the floor line is more than 6 feet from an outlet (the ‘12-foot rule’).
4. Which of the following locations in a residential dwelling does NOT require AFCI protection
under the NEC 210.12?
A. Bedrooms
B. Living rooms
, C. Bathrooms
D. Hallways
Answer: C
Conceptual Explanation: While bedrooms, living rooms, and hallways require AFCI,
bathrooms (and garages/unfinished basements in some versions) are typically excluded
from AFCI requirements, though they require GFCI.
5. What is the maximum distance a laundry receptacle can be from the laundry equipment?
A. 3 feet
B. 6 feet
C. 8 feet
D. There is no maximum distance
Answer: B
Conceptual Explanation: NEC 210.50(C) requires the receptacle for a specific appliance to
be within 6 feet of the intended location of the appliance.
6. A 120-volt, 20-ampere branch circuit supplies a single bathroom. Can this circuit supply
lighting in the same bathroom?
A. Yes, but only if the lighting is GFCI protected.
B. No, it must only supply receptacles.
C. Yes, if the circuit supplies no other rooms.
