Examination: 2023 NEC with 2026 Georgia
Amendments
Section 1: General Electrical Theory & Fundamentals (Questions 1-
25)
1. What is the maximum voltage drop recommended for branch
k k k k k k k k
kcircuits in residential wiring?
k k k
a) 3%
b) 5%
c) 8%
d) 10%
Answer: a) 3% k k
Rationale: The NEC recommends a maximum voltage drop of
k k k k k k k k
k3% for branch circuits and 5% total for feeders and branch
k k k k k k k k k k
kcircuits combined to maintain efficient operation of
k k k k k k
kelectrical devices . k k
2. Which conductor color is typically used for grounding in the
k k k k k k k k k
U.S.?
k
a) Black
b) Red
c) White
d) Green
Answer: d) Green k k
Rationale: Green or bare copper wires are designated for
k k k k k k k k
equipment grounding conductors to ensure safety and proper
k k k k k k k k
identification per NEC 250.119 .
k k k k k
,3. What is the primary purpose of a GFCI (Ground Fault Circuit
k k k k k k k k k k
Interrupter)?
k
a) To prevent overcurrent
k k
b) To protect against electric shock
k k k k
c) To control voltage
k k
d) To provide backup power
k k k
Answer: b) To protect against electric shock
k k k k k k
Rationale: GFCIs detect imbalances between hot and neutral
k k k k k k k
wires (leakage current) and quickly shut off power to
k k k k k k k k k
prevent serious electric shock .
k k k k k
4. What is the NEC minimum wire size for a 20-amp residential
k k k k k k k k k k
branch circuit?
k k
a) 14 AWG
k
b) 12 AWG
k
c) 10 AWG
k
d) 8 AWG
k
Answer: b) 12 AWG k k k
Rationale: NEC Table 310.16 specifies 12 AWG copper wire as
k k k k k k k k k
the minimum size for a 20-amp circuit to safely handle the
k k k k k k k k k k k
load without overheating .
k k k k
5. The term "ampacity" refers to:
k k k k
a) Resistance of a conductor k k k
b) Maximum current a conductor can carry safely
k k k k k k
c) Voltage drop k
d) Conduit size k
Answer: b) Maximum current a conductor can carry safely
k k k k k k k k
Rationale: Ampacity is the maximum current, in amperes,
k k k k k k k k
,that a conductor can carry continuously under the conditions
k k k k k k k k
of use without exceeding its temperature rating .
k k k k k k k k
6. Which NEC article covers grounding and bonding?
k k k k k k
a) Article 310 k
b) Article 250 k
c) Article 430 k
d) Article 404 k
Answer: b) Article 250 k k k
Rationale: Article 250 of the NEC details the requirements for
k k k k k k k k k
grounding and bonding electrical systems to ensure safety
k k k k k k k k
by providing a path for fault current .
k k k k k k k k
7. What is the typical residential service voltage in Georgia?
k k k k k k k k
a) 120V only k
b) 208V
c) 120/240V
d) 277/480V
Answer: c) 120/240V k k
Rationale: Most U.S. homes, including Georgia, use split-
k k k k k k k
phase 120/240V for residential service to supply general
k k k k k k k k
lighting and appliances .
k k k k
8. Which of the following protects circuits from overload?
k k k k k k k
a) GFCI
b) Surge protector k
c) Circuit breaker or fuse k k k
d) Transformer
Answer: c) Circuit breaker or fuse
k k k k k
Rationale: Circuit breakers and fuses are designed to
k k k k k k k
, interrupt current when it exceeds safe levels (overcurrent),
k k k k k k k
kprotecting conductors and equipment . k k k k
9. What is the maximum number of 15-amp receptacles allowed on
k k k k k k k k k
a 15-amp general lighting branch circuit per NEC?
k k k k k k k k
a) 6
b) 8
c) 10
d) No limit k
Answer: d) No limit k k k
Rationale: The NEC does not limit the number of receptacles
k k k k k k k k k
on a 15-amp circuit; however, the load must not exceed the
k k k k k k k k k k k
circuit rating. Standard practice often limits to 8-10, but code
k k k k k k k k k k
does not specify .
k k k k
10. In a 3-way switch setup, what color is typically used for the
k k k k k k k k k k k
ktraveler wires? k
a) Black only k
b) Red and Black k k
c) White
d) Green
Answer: b) Red and Black k k k k
Rationale: Red and black wires are commonly used as travelers
k k k k k k k k k
kbetween 3-way switches to distinguish them from the common
k k k k k k k k
kterminal wire . k k
11. A feeder supplies power to:
k k k k
a) Individual outlets only k k
b) Subpanels or branch circuits k k k
c) Only a single device k k k