NORTH CAROLINA RESIDENTIAL
SINGLE-FAMILY DWELLING
ELECTRICAL CONTRACTOR
LICENSING EXAM QUESTIONS AND
CORRECT ANSWERS WITH
EXPLANATIONS
1. According to the NEC, what is the minimum number of 20-ampere small-appliance branch
circuits required for a dwelling unit kitchen?
A. Two
B. One
C. Three
D. Four
Answer: A
Conceptual Explanation: NEC 210.11(C)(1) requires at least two 20-ampere small-
appliance branch circuits for all receptacle outlets specified by 210.52(B).
2. What is the maximum distance a receptacle can be from the edge of a kitchen sink for it to
be required to have GFCI protection?
A. 3 feet
,B. 4 feet
C. 10 feet
D. 6 feet
Answer: D
Conceptual Explanation: NEC 210.8(A)(7) states that all 125-volt through 250-volt
receptacles installed within 6 feet of the top inside edge of the bowl of the sink shall have
GFCI protection.
3. When calculating box fill, how many conductor volume allowances must be made for a
single yoke or strap containing one or more devices?
A. One
B. Three
C. Two
D. Four
Answer: C
Conceptual Explanation: NEC 314.16(B)(4) requires a double volume allowance based on
the largest conductor connected to a device on that yoke.
4. What is the minimum size copper grounding electrode conductor for a 200-ampere service
using 2/0 AWG copper service-entrance conductors?
A. #8 AWG
, B. #6 AWG
C. #4 AWG
D. #2 AWG
Answer: C
Conceptual Explanation: According to NEC Table 250.66, for 2/0 AWG copper service
conductors, a #4 AWG copper grounding electrode conductor is required.
5. In a single-family dwelling, what is the maximum length of a cord-and-plug connection for
a built-in dishwasher?
A. 3 feet
B. 6.5 feet
C. 4 feet
D. 10 feet
Answer: B
Conceptual Explanation: NEC 422.16(B)(2) specifies that the length of the cord for a
built-in dishwasher shall be between 3 feet and 6.5 feet.
6. Which of the following locations in a dwelling unit does NOT require Arc-Fault Circuit-
Interrupter (AFCI) protection?
A. Family rooms
B. Dining rooms
SINGLE-FAMILY DWELLING
ELECTRICAL CONTRACTOR
LICENSING EXAM QUESTIONS AND
CORRECT ANSWERS WITH
EXPLANATIONS
1. According to the NEC, what is the minimum number of 20-ampere small-appliance branch
circuits required for a dwelling unit kitchen?
A. Two
B. One
C. Three
D. Four
Answer: A
Conceptual Explanation: NEC 210.11(C)(1) requires at least two 20-ampere small-
appliance branch circuits for all receptacle outlets specified by 210.52(B).
2. What is the maximum distance a receptacle can be from the edge of a kitchen sink for it to
be required to have GFCI protection?
A. 3 feet
,B. 4 feet
C. 10 feet
D. 6 feet
Answer: D
Conceptual Explanation: NEC 210.8(A)(7) states that all 125-volt through 250-volt
receptacles installed within 6 feet of the top inside edge of the bowl of the sink shall have
GFCI protection.
3. When calculating box fill, how many conductor volume allowances must be made for a
single yoke or strap containing one or more devices?
A. One
B. Three
C. Two
D. Four
Answer: C
Conceptual Explanation: NEC 314.16(B)(4) requires a double volume allowance based on
the largest conductor connected to a device on that yoke.
4. What is the minimum size copper grounding electrode conductor for a 200-ampere service
using 2/0 AWG copper service-entrance conductors?
A. #8 AWG
, B. #6 AWG
C. #4 AWG
D. #2 AWG
Answer: C
Conceptual Explanation: According to NEC Table 250.66, for 2/0 AWG copper service
conductors, a #4 AWG copper grounding electrode conductor is required.
5. In a single-family dwelling, what is the maximum length of a cord-and-plug connection for
a built-in dishwasher?
A. 3 feet
B. 6.5 feet
C. 4 feet
D. 10 feet
Answer: B
Conceptual Explanation: NEC 422.16(B)(2) specifies that the length of the cord for a
built-in dishwasher shall be between 3 feet and 6.5 feet.
6. Which of the following locations in a dwelling unit does NOT require Arc-Fault Circuit-
Interrupter (AFCI) protection?
A. Family rooms
B. Dining rooms
