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ICC RESIDENTIAL ELECTRICAL INSPECTOR (E1) Original
Exam Questions with Answers and Rationales
Section 1: General Requirements and Definitions (Questions
1–15)
1. What is the primary purpose of the National Electrical
Code (NEC)?
A. To increase electrical costs
B. To provide practical safeguarding of persons and
property from electrical hazards
C. To promote electrical sales
D. To regulate electricians only
Answer: B
Rationale: The NEC (NFPA 70) is designed to protect
people and property from electrical hazards by
establishing minimum standards for safe electrical
installations.
2. What does the term "accessible" mean in the NEC as
applied to equipment?
A. Admitting close approach but not guarded
B. Capable of being reached quickly for operation without
tools
C. Capable of being removed or exposed without damaging
the structure
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D. All of the above depending on context
Answer: D
Rationale: The NEC defines "accessible" differently
depending on context—accessible (equipment) means
not guarded by locked doors or obstacles; accessible
(readily) means reachable quickly without tools;
accessible (wiring methods) means capable of being
exposed without damage.
3. What is the definition of "ampacity" in the NEC?
A. The voltage rating of a conductor
B. The maximum current a conductor can carry
continuously without exceeding its temperature rating
C. The resistance of a conductor
D. The length of a conductor
Answer: B
Rationale: Ampacity is the maximum continuous current-
carrying capacity of a conductor, expressed in amperes,
without exceeding its rated temperature.
4. What is a "branch circuit" as defined by the NEC?
A. The service entrance conductors
B. The circuit conductors between the final overcurrent
protective device and the outlet(s)
C. The feeder conductors
D. The grounding electrode conductor
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Answer: B
Rationale: A branch circuit is the portion of the wiring
system between the final overcurrent protective device
(breaker or fuse) and the outlets or loads it serves.
5. What is a "feeder" in the NEC?
A. The conductors from the utility to the service panel
B. The circuit conductors between the service equipment
and the final branch circuit overcurrent device
C. The grounding conductor
D. The neutral conductor only
Answer: B
Rationale: A feeder carries power from the service
equipment (or other source) to the final branch circuit
overcurrent protective device, not directly to outlets.
6. What is the definition of "grounded conductor" in the
NEC?
A. A conductor that is intentionally connected to earth
B. A conductor that carries current under normal
conditions (usually the neutral) and is intentionally
grounded
C. A conductor that only carries fault current
D. Any green conductor
Answer: B
Rationale: The grounded conductor (often the neutral) is
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a current-carrying conductor that is intentionally
connected to the grounding electrode system. It is
typically white or gray.
7. What is the definition of "equipment grounding
conductor" (EGC) in the NEC?
A. A current-carrying conductor
B. A non-current-carrying conductor that connects non-
current-carrying metal parts to the grounding electrode
system
C. The neutral conductor
D. The hot conductor
Answer: B
Rationale: The EGC is the protective conductor that bonds
metal enclosures, equipment, and raceways to the
grounding system, providing a low-impedance path for
fault current. It is typically green or bare.
8. What is the definition of "bonding" in the NEC?
A. Connecting to earth
B. The permanent joining of metallic parts to form an
electrically conductive path ensuring continuity and
capacity to conduct fault current
C. Insulating metallic parts
D. Painting metallic parts
Answer: B
ICC RESIDENTIAL ELECTRICAL INSPECTOR (E1) Original
Exam Questions with Answers and Rationales
Section 1: General Requirements and Definitions (Questions
1–15)
1. What is the primary purpose of the National Electrical
Code (NEC)?
A. To increase electrical costs
B. To provide practical safeguarding of persons and
property from electrical hazards
C. To promote electrical sales
D. To regulate electricians only
Answer: B
Rationale: The NEC (NFPA 70) is designed to protect
people and property from electrical hazards by
establishing minimum standards for safe electrical
installations.
2. What does the term "accessible" mean in the NEC as
applied to equipment?
A. Admitting close approach but not guarded
B. Capable of being reached quickly for operation without
tools
C. Capable of being removed or exposed without damaging
the structure
,https://www.stuvia.com/user/performance
D. All of the above depending on context
Answer: D
Rationale: The NEC defines "accessible" differently
depending on context—accessible (equipment) means
not guarded by locked doors or obstacles; accessible
(readily) means reachable quickly without tools;
accessible (wiring methods) means capable of being
exposed without damage.
3. What is the definition of "ampacity" in the NEC?
A. The voltage rating of a conductor
B. The maximum current a conductor can carry
continuously without exceeding its temperature rating
C. The resistance of a conductor
D. The length of a conductor
Answer: B
Rationale: Ampacity is the maximum continuous current-
carrying capacity of a conductor, expressed in amperes,
without exceeding its rated temperature.
4. What is a "branch circuit" as defined by the NEC?
A. The service entrance conductors
B. The circuit conductors between the final overcurrent
protective device and the outlet(s)
C. The feeder conductors
D. The grounding electrode conductor
,https://www.stuvia.com/user/performance
Answer: B
Rationale: A branch circuit is the portion of the wiring
system between the final overcurrent protective device
(breaker or fuse) and the outlets or loads it serves.
5. What is a "feeder" in the NEC?
A. The conductors from the utility to the service panel
B. The circuit conductors between the service equipment
and the final branch circuit overcurrent device
C. The grounding conductor
D. The neutral conductor only
Answer: B
Rationale: A feeder carries power from the service
equipment (or other source) to the final branch circuit
overcurrent protective device, not directly to outlets.
6. What is the definition of "grounded conductor" in the
NEC?
A. A conductor that is intentionally connected to earth
B. A conductor that carries current under normal
conditions (usually the neutral) and is intentionally
grounded
C. A conductor that only carries fault current
D. Any green conductor
Answer: B
Rationale: The grounded conductor (often the neutral) is
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a current-carrying conductor that is intentionally
connected to the grounding electrode system. It is
typically white or gray.
7. What is the definition of "equipment grounding
conductor" (EGC) in the NEC?
A. A current-carrying conductor
B. A non-current-carrying conductor that connects non-
current-carrying metal parts to the grounding electrode
system
C. The neutral conductor
D. The hot conductor
Answer: B
Rationale: The EGC is the protective conductor that bonds
metal enclosures, equipment, and raceways to the
grounding system, providing a low-impedance path for
fault current. It is typically green or bare.
8. What is the definition of "bonding" in the NEC?
A. Connecting to earth
B. The permanent joining of metallic parts to form an
electrically conductive path ensuring continuity and
capacity to conduct fault current
C. Insulating metallic parts
D. Painting metallic parts
Answer: B
