NORTH CAROLINA RESIDENTIAL
SINGLE-FAMILY DWELLING
ELECTRICAL CONTRACTOR (SP-SFD)
LICENSING EXAM PREP 2026/2027
QUESTIONS AND CORRECT ANSWERS
WITH EXPLANATIONS
1. According to North Carolina General Statutes Chapter 87, Article 4, what is the maximum
value of a single project for which an SP-SFD licensee can act as the prime contractor?
A. There is no project value limit for SP-SFD licensees
B. $50,000
C. $100,000
D. $250,000
Answer: A
Conceptual Explanation: The North Carolina State Board of Examiners of Electrical
Contractors does not impose a project value dollar limit on the SP-SFD license; the limit is
based on the scope of work, specifically single-family dwellings.
2. Under the NEC, what is the maximum number of 12 AWG THHN conductors permitted in a
1/2-inch EMT conduit?
A. 6
,B. 15
C. 12
D. 9
Answer: D
Conceptual Explanation: Based on NEC Annex C, Table C.1, a 1/2-inch EMT conduit can
hold up to 9 12 AWG THHN conductors.
3. A dwelling unit has a 200-ampere service. What is the minimum size copper Grounding
Electrode Conductor required for a concrete-encased electrode?
A. 4 AWG
B. 6 AWG
C. 2 AWG
D. 1/0 AWG
Answer: A
Conceptual Explanation: NEC 250.66(B) states that the portion of the grounding
electrode conductor that is the sole connection to the concrete-encased electrode shall not
be required to be larger than 4 AWG copper.
4. When calculating box fill, how many conductor volume allowances must be made for a
device (strap) such as a duplex receptacle?
A. One volume allowance
, B. Two volume allowances
C. Three volume allowances
D. Zero volume allowances
Answer: B
Conceptual Explanation: NEC 314.16(B)(4) requires each yoke or strap containing one or
more devices to be counted as a double volume allowance based on the largest conductor
connected to the device.
5. All 125-volt, single-phase, 15- and 20-ampere receptacles installed in dwelling unit
bathrooms must have:
A. AFCI protection only
B. Surge protection
C. Both AFCI and GFCI protection
D. GFCI protection only
Answer: D
Conceptual Explanation: NEC 210.8(A)(1) requires GFCI protection for all 125-volt, 15-
and 20-ampere receptacles in bathrooms. AFCI is generally required for areas like
bedrooms and living rooms (210.12).
SINGLE-FAMILY DWELLING
ELECTRICAL CONTRACTOR (SP-SFD)
LICENSING EXAM PREP 2026/2027
QUESTIONS AND CORRECT ANSWERS
WITH EXPLANATIONS
1. According to North Carolina General Statutes Chapter 87, Article 4, what is the maximum
value of a single project for which an SP-SFD licensee can act as the prime contractor?
A. There is no project value limit for SP-SFD licensees
B. $50,000
C. $100,000
D. $250,000
Answer: A
Conceptual Explanation: The North Carolina State Board of Examiners of Electrical
Contractors does not impose a project value dollar limit on the SP-SFD license; the limit is
based on the scope of work, specifically single-family dwellings.
2. Under the NEC, what is the maximum number of 12 AWG THHN conductors permitted in a
1/2-inch EMT conduit?
A. 6
,B. 15
C. 12
D. 9
Answer: D
Conceptual Explanation: Based on NEC Annex C, Table C.1, a 1/2-inch EMT conduit can
hold up to 9 12 AWG THHN conductors.
3. A dwelling unit has a 200-ampere service. What is the minimum size copper Grounding
Electrode Conductor required for a concrete-encased electrode?
A. 4 AWG
B. 6 AWG
C. 2 AWG
D. 1/0 AWG
Answer: A
Conceptual Explanation: NEC 250.66(B) states that the portion of the grounding
electrode conductor that is the sole connection to the concrete-encased electrode shall not
be required to be larger than 4 AWG copper.
4. When calculating box fill, how many conductor volume allowances must be made for a
device (strap) such as a duplex receptacle?
A. One volume allowance
, B. Two volume allowances
C. Three volume allowances
D. Zero volume allowances
Answer: B
Conceptual Explanation: NEC 314.16(B)(4) requires each yoke or strap containing one or
more devices to be counted as a double volume allowance based on the largest conductor
connected to the device.
5. All 125-volt, single-phase, 15- and 20-ampere receptacles installed in dwelling unit
bathrooms must have:
A. AFCI protection only
B. Surge protection
C. Both AFCI and GFCI protection
D. GFCI protection only
Answer: D
Conceptual Explanation: NEC 210.8(A)(1) requires GFCI protection for all 125-volt, 15-
and 20-ampere receptacles in bathrooms. AFCI is generally required for areas like
bedrooms and living rooms (210.12).
