National Electrical Code Definitions Exam Questions with Verified Answers Latest Update 2024-2025
(Already Passed)
Accessible (as applied to equipment) - Answers Admitting close approach; not guarded by locked doors,
elevation, or other effective means.
Accessible (as applied to wiring methods) - Answers Capable of being removed or exposed without
damaging the building structure or finish or not permanently closed in by the structure or finish of the
building.
Accessible, Readily (Readily Accessible) - Answers Capable of being reached quickly for operation,
renewal, or inspections without requiring those to whom ready access is requisite to actions such as to
use tools, to climb over or remove obstacles, or to resort to portable ladders, and so forth.
Adjustable speed drive - Answers Power conversion equipment that provides a means of adjusting the
speed of an electric motor.
Adjustable speed drive system - Answers A combination of an adjustable speed drive, its associated
motor(s), and auxiliary equipment.
Ampacity - Answers The maximum current, in amperes, that a conductor can carry continuously under
the conditions of use without exceeding its temperature rating.
Appliance - Answers Utilization equipment, generally other than industrial, that is normally built in
standardized sizes or types and is installed or connected as a unit to perform one or more functions such
as clothes washing, air-conditioning, food mixing, deep frying etc.
Approved - Answers Acceptable to the authority having jurisdiction.
Arc-Fault Circuit Interrupter (AFCI) - Answers A device intended to provide protection from the effects of
arc faults by recognizing characteristics unique to arcing and by functioning to de-energize the circuit
when an arc fault is detected.
Askarel - Answers A generic term for a group of nonflammable synthetic chlorinated hydrocarbons used
as electrical insulating media.
Associated Apparatus [as applied to Hazardous (Classified) Locations] - Answers Apparatus in which
circuits are not necessarily interest simply safe themselves but that affects the energy in the intrinsically
safe circuits and is relied on to maintain intrinsic safety. Such apparatus is one of the following:
(1) electrical apparatus that has an alternative type of protection for use in the appropriate hazardous
parentheses (classified) location
,(2) electrical apparatus not so protected that shall not be used within a hazardous (classified) location
Associated nonicendive feild apparatus [as applied to hazardous (Classified) locations] - Answers
Apparatus in which the circuits are not necessarily nonincendive send of themselves but that affect the
energy in nonincendive field wiring circuits in our relied upon to maintain non-incentive energy levels.
Such apparatuses are one of the following:
(1) electrical apparatus that has an alternative type of protection for use in the appropriate hazardous
(classified) location
(2) electrical apparatus not so protected that shall not be used in a hazardous (classified) location
Attachment Plug (Plug Cap) (Plug) - Answers A device that, by insertion in a receptacle, establishes a
connection between the conductors of the attached flexible cord and the conductors connected
permanently to the receptacle.
Authority Having Jurisdiction (AHJ) - Answers An organization, office, or individual responsible for
enforcing the requirements of a code or standard, or for approving equipment, materials, an
installation, or a procedure.
Automatic - Answers Performing a function without the necessity of human intervention.
Bathroom - Answers An area including a basin with one or more of the following: a toilet, a urinal, a tub,
a shower, a bidet, or similar plumbing fixtures.
Battery System - Answers Interconnected battery subsystems consisting of one or more storage
batteries and battery chargers, and can include inverters, converters, and associated electrical
equipment.
Bonded (Bonding) - Answers Connected to establish electrical continuity and conductivity.
Bonding Conductor or Jumper - Answers A reliable conductor to ensure the required electrical
conductivity between metal parts required to be electrically connected.
Bonding Jumper, Equipment - Answers The connection between two or more portions of the equipment
grounding conductor.
Bonding Jumper, Main - Answers The connection between the grounded circuit conductor and the
equipment grounding conductor at the service.
Bonding Jumper, System - Answers The connection between the grounded circuit conductor and the
supply-side bonding jumper, or the equipment grounding conductor, or both, at a separately derived
system.
, Branch Circuit - Answers The circuit conductors between the final overcurrent device protecting the
circuit and the outlet(s).
Branch Circuit, Appliance - Answers A branch circuit that supplies energy to one or more outlets to
which appliances are to be connected and that has no permanently connected luminaires that are not a
part of an appliance.
Branch Circuit, General-Purpose - Answers A branch circuit that supplies two or more receptacles or
outlets for lighting and appliances.
Branch Circuit, Individual - Answers A branch circuit that supplies only one utilization equipment.
Branch Circuit, Multiwire - Answers A branch circuit that consists of two or more ungrounded
conductors that have a voltage between them, and a grounded conductor that has equal voltage
between it and each ungrounded conductor of the circuit and that is connected to the neutral or
grounded conductor of the system.
Building - Answers A structure that stands alone or that is separated from adjoining structures by fire
walls.
Cabinet - Answers An enclosure that is designed for either surface mounting or flush mounting and is
provided with a frame, mat, or trim in which a swinging door or doors are or can be hung.
Cable Routing Assembly - Answers A single channel or connected multiple channels, as well as
associated fittings, forming a structural system that is used to support and route communications wires
and cables, optical fiber cables, data cables associated with information technology and communications
equipment, Class 2 and Class 3 cables, and powerlimited fire alarm cables.
Charge Controller - Answers Equipment that controls dc voltage or dc current, or both, and that is used
to charge a battery or other energy storage device.
Circuit Breaker - Answers A device designed to open and close a circuit by nonautomatic means and to
open the circuit automatically on a predetermined overcurrent without damage to itself when Properly
applied within its rating.
Adjustable (as applied to circuit breakers) - Answers A qualifying term indicating that the circuit breaker
can be set to trip at various values of current, time, or both, within a predetermined range.
Instantaneous Trip (as applied to circuit breakers). - Answers A qualifying term indicating that no delay is
purposely introduced in the tripping action of the circuit breaker.
Inverse Time (as applied to circuit breakers) - Answers A qualifying term indicating that there is
purposely introduced a delay in the tripping action of the circuit breaker, which delay decreases as the
magnitude of the current increases.
(Already Passed)
Accessible (as applied to equipment) - Answers Admitting close approach; not guarded by locked doors,
elevation, or other effective means.
Accessible (as applied to wiring methods) - Answers Capable of being removed or exposed without
damaging the building structure or finish or not permanently closed in by the structure or finish of the
building.
Accessible, Readily (Readily Accessible) - Answers Capable of being reached quickly for operation,
renewal, or inspections without requiring those to whom ready access is requisite to actions such as to
use tools, to climb over or remove obstacles, or to resort to portable ladders, and so forth.
Adjustable speed drive - Answers Power conversion equipment that provides a means of adjusting the
speed of an electric motor.
Adjustable speed drive system - Answers A combination of an adjustable speed drive, its associated
motor(s), and auxiliary equipment.
Ampacity - Answers The maximum current, in amperes, that a conductor can carry continuously under
the conditions of use without exceeding its temperature rating.
Appliance - Answers Utilization equipment, generally other than industrial, that is normally built in
standardized sizes or types and is installed or connected as a unit to perform one or more functions such
as clothes washing, air-conditioning, food mixing, deep frying etc.
Approved - Answers Acceptable to the authority having jurisdiction.
Arc-Fault Circuit Interrupter (AFCI) - Answers A device intended to provide protection from the effects of
arc faults by recognizing characteristics unique to arcing and by functioning to de-energize the circuit
when an arc fault is detected.
Askarel - Answers A generic term for a group of nonflammable synthetic chlorinated hydrocarbons used
as electrical insulating media.
Associated Apparatus [as applied to Hazardous (Classified) Locations] - Answers Apparatus in which
circuits are not necessarily interest simply safe themselves but that affects the energy in the intrinsically
safe circuits and is relied on to maintain intrinsic safety. Such apparatus is one of the following:
(1) electrical apparatus that has an alternative type of protection for use in the appropriate hazardous
parentheses (classified) location
,(2) electrical apparatus not so protected that shall not be used within a hazardous (classified) location
Associated nonicendive feild apparatus [as applied to hazardous (Classified) locations] - Answers
Apparatus in which the circuits are not necessarily nonincendive send of themselves but that affect the
energy in nonincendive field wiring circuits in our relied upon to maintain non-incentive energy levels.
Such apparatuses are one of the following:
(1) electrical apparatus that has an alternative type of protection for use in the appropriate hazardous
(classified) location
(2) electrical apparatus not so protected that shall not be used in a hazardous (classified) location
Attachment Plug (Plug Cap) (Plug) - Answers A device that, by insertion in a receptacle, establishes a
connection between the conductors of the attached flexible cord and the conductors connected
permanently to the receptacle.
Authority Having Jurisdiction (AHJ) - Answers An organization, office, or individual responsible for
enforcing the requirements of a code or standard, or for approving equipment, materials, an
installation, or a procedure.
Automatic - Answers Performing a function without the necessity of human intervention.
Bathroom - Answers An area including a basin with one or more of the following: a toilet, a urinal, a tub,
a shower, a bidet, or similar plumbing fixtures.
Battery System - Answers Interconnected battery subsystems consisting of one or more storage
batteries and battery chargers, and can include inverters, converters, and associated electrical
equipment.
Bonded (Bonding) - Answers Connected to establish electrical continuity and conductivity.
Bonding Conductor or Jumper - Answers A reliable conductor to ensure the required electrical
conductivity between metal parts required to be electrically connected.
Bonding Jumper, Equipment - Answers The connection between two or more portions of the equipment
grounding conductor.
Bonding Jumper, Main - Answers The connection between the grounded circuit conductor and the
equipment grounding conductor at the service.
Bonding Jumper, System - Answers The connection between the grounded circuit conductor and the
supply-side bonding jumper, or the equipment grounding conductor, or both, at a separately derived
system.
, Branch Circuit - Answers The circuit conductors between the final overcurrent device protecting the
circuit and the outlet(s).
Branch Circuit, Appliance - Answers A branch circuit that supplies energy to one or more outlets to
which appliances are to be connected and that has no permanently connected luminaires that are not a
part of an appliance.
Branch Circuit, General-Purpose - Answers A branch circuit that supplies two or more receptacles or
outlets for lighting and appliances.
Branch Circuit, Individual - Answers A branch circuit that supplies only one utilization equipment.
Branch Circuit, Multiwire - Answers A branch circuit that consists of two or more ungrounded
conductors that have a voltage between them, and a grounded conductor that has equal voltage
between it and each ungrounded conductor of the circuit and that is connected to the neutral or
grounded conductor of the system.
Building - Answers A structure that stands alone or that is separated from adjoining structures by fire
walls.
Cabinet - Answers An enclosure that is designed for either surface mounting or flush mounting and is
provided with a frame, mat, or trim in which a swinging door or doors are or can be hung.
Cable Routing Assembly - Answers A single channel or connected multiple channels, as well as
associated fittings, forming a structural system that is used to support and route communications wires
and cables, optical fiber cables, data cables associated with information technology and communications
equipment, Class 2 and Class 3 cables, and powerlimited fire alarm cables.
Charge Controller - Answers Equipment that controls dc voltage or dc current, or both, and that is used
to charge a battery or other energy storage device.
Circuit Breaker - Answers A device designed to open and close a circuit by nonautomatic means and to
open the circuit automatically on a predetermined overcurrent without damage to itself when Properly
applied within its rating.
Adjustable (as applied to circuit breakers) - Answers A qualifying term indicating that the circuit breaker
can be set to trip at various values of current, time, or both, within a predetermined range.
Instantaneous Trip (as applied to circuit breakers). - Answers A qualifying term indicating that no delay is
purposely introduced in the tripping action of the circuit breaker.
Inverse Time (as applied to circuit breakers) - Answers A qualifying term indicating that there is
purposely introduced a delay in the tripping action of the circuit breaker, which delay decreases as the
magnitude of the current increases.
