NEC Article-Based Practice Questions And
Answers Plus Rationales | Instant Pdf
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###1. What does the NEC define as the maximum current a
conductor can carry continuously without exceeding its
temperature rating?
A) Overload capacity
B) Continuous rating
C) Ampacity
D) Thermal limit
Correct Answer: C) Ampacity
Detailed Answer: Article 100 defines ampacity as the
maximum current, in amperes, that a conductor can carry
continuously under the conditions of use without exceeding its
temperature rating.
###2. According to Article 100, how many hours must a load
operate to be considered a "continuous load"?
A) 1 hour
B) 2 hours
,C) 3 hours
D) 4 hours
Correct Answer: C) 3 hours
Detailed Answer: A continuous load is defined in Article 100 as
a load where the maximum current is expected to continue for
three hours or more.
###3. What term describes the connection of electrical
equipment to establish electrical continuity and conductivity?
A) Grounded
B) Bonded
C) Labeled
D) Identified
Correct Answer: B) Bonded
Detailed Answer: Article 100 defines "Bonded (Bonding)" as
connected to establish electrical continuity and conductivity.
###4. The overhead conductors between the utility electric
supply system and the service point are known as what?
A) Service-entrance conductors
B) Service drop
,C) Service lateral
D) Feeder
Correct Answer: B) Service drop
Detailed Answer: Article 100 defines a service drop as the
overhead conductors between the utility electric supply system
and the service point.
###5. What does Article 100 define as "accessible" (as applied
to wiring methods)?
A) Capable of being reached without removing obstacles
B) Capable of being removed without damaging the structure
C) Not permanently closed in
D) Visible and not more than 50 ft distant
Correct Answer: A) Capable of being reached without
removing obstacles
Detailed Answer: Accessible means capable of being reached
for operation, repair, or inspection without removing obstacles.
###6. A device that protects personnel by de-energizing a
circuit when a ground-fault current exceeds a specific value is
called:
A) Circuit breaker
, B) GFCI
C) AFCI
D) Surge protector
Correct Answer: B) GFCI
Detailed Answer: A Ground-Fault Circuit Interrupter (GFCI) is
defined in Article 100 as a device that de-energizes a circuit
when a ground-fault current exceeds the values established for
a Class A device.
###7. According to Article 100, which of the following is NOT a
type of dwelling?
A) One-family dwelling
B) Two-family dwelling
C) Multifamily dwelling
D) Dormitory unit
Correct Answer: D) Dormitory unit
Detailed Answer: Article 100 defines three types of dwellings:
one-family, two-family, and multifamily. Dormitory units are
separately defined.
###8. What term describes equipment that has been tested and
bears a mark from an organization acceptable to the authority
Answers Plus Rationales | Instant Pdf
Download 2026
###1. What does the NEC define as the maximum current a
conductor can carry continuously without exceeding its
temperature rating?
A) Overload capacity
B) Continuous rating
C) Ampacity
D) Thermal limit
Correct Answer: C) Ampacity
Detailed Answer: Article 100 defines ampacity as the
maximum current, in amperes, that a conductor can carry
continuously under the conditions of use without exceeding its
temperature rating.
###2. According to Article 100, how many hours must a load
operate to be considered a "continuous load"?
A) 1 hour
B) 2 hours
,C) 3 hours
D) 4 hours
Correct Answer: C) 3 hours
Detailed Answer: A continuous load is defined in Article 100 as
a load where the maximum current is expected to continue for
three hours or more.
###3. What term describes the connection of electrical
equipment to establish electrical continuity and conductivity?
A) Grounded
B) Bonded
C) Labeled
D) Identified
Correct Answer: B) Bonded
Detailed Answer: Article 100 defines "Bonded (Bonding)" as
connected to establish electrical continuity and conductivity.
###4. The overhead conductors between the utility electric
supply system and the service point are known as what?
A) Service-entrance conductors
B) Service drop
,C) Service lateral
D) Feeder
Correct Answer: B) Service drop
Detailed Answer: Article 100 defines a service drop as the
overhead conductors between the utility electric supply system
and the service point.
###5. What does Article 100 define as "accessible" (as applied
to wiring methods)?
A) Capable of being reached without removing obstacles
B) Capable of being removed without damaging the structure
C) Not permanently closed in
D) Visible and not more than 50 ft distant
Correct Answer: A) Capable of being reached without
removing obstacles
Detailed Answer: Accessible means capable of being reached
for operation, repair, or inspection without removing obstacles.
###6. A device that protects personnel by de-energizing a
circuit when a ground-fault current exceeds a specific value is
called:
A) Circuit breaker
, B) GFCI
C) AFCI
D) Surge protector
Correct Answer: B) GFCI
Detailed Answer: A Ground-Fault Circuit Interrupter (GFCI) is
defined in Article 100 as a device that de-energizes a circuit
when a ground-fault current exceeds the values established for
a Class A device.
###7. According to Article 100, which of the following is NOT a
type of dwelling?
A) One-family dwelling
B) Two-family dwelling
C) Multifamily dwelling
D) Dormitory unit
Correct Answer: D) Dormitory unit
Detailed Answer: Article 100 defines three types of dwellings:
one-family, two-family, and multifamily. Dormitory units are
separately defined.
###8. What term describes equipment that has been tested and
bears a mark from an organization acceptable to the authority
