NFPA 70 – ARTICLE 100 – DEFINITIONS
LATEST UPDATED
Ampacity - ANSWER The maximum continuous current, in amperes, a
conductor is allowed to carry under usage conditions without exceeding its
temperature limit.
Appliance - ANSWER Device for use, commonly other than industrial,
generally made in standardized shapes or dimensions and installed or plugged in
whole to perform one or more functions such as cleaning garments, air
conditioning, food blending, deep-frying, and so on.
Appliance Branch Circuit - ANSWER A branch circuit supplying one or more
outlets to which appliances are to be connected and containing no permanently
installed luminaires other than those forming part of an appliance.
Approved - ANSWER Compliant to the authority having jurisdiction.
Arc-Fault Circuit Interrupter (AFCI) - ANSWER A circuit interrupter rated to
protect personnel from the damaging effects of arc faults by monitoring
characteristics unique to arcing and by acting on those characteristics to de-
energize the circuit when detecting an arc fault.
Authority Having Jurisdiction (AHJ) - ANSWER An office, organization, or
individual having jurisdiction to adopt, administer, and enforce codes or
standards, or to approve apparatus, materials, an installation, or a method.
Bonded (Bonding) - ANSWER Combined together to achieve electrical
continuity and conductance.
, Main Bonding Jumper - ANSWER The connection between the grounded
circuit conductor and the equipment grounding conductor at the service.
System Bonding Jumper - ANSWER 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 - ANSWER Those circuit conductors from the last overcurrent
device that protects the circuit to the outlet(s).
Building - ANSWER A building that is independent or one which is separated
from neighboring buildings by fire walls and which has all openings in the same
protected by approved fire doors.
Cabinet - ANSWER A box-shaped case which is either flush mounted or
surface mounted and is fitted with a frame, trim, or mat in which a swinging
door or doors are or can be hung.
Circuit Breaker - ANSWER A device designed for opening and closing a
circuit by nonautomatic means and for automatically opening the circuit on a
predetermined overcurrent without suffering damage to itself when used
properly within its rating.
Concealed - ANSWER Rendered inaccessible by building structure or finish.
Wires in concealed raceways are hidden, though they may become accessible by
pulling them out.
Continuous Duty - ANSWER Operating at a steady high load for an
indefinitely long period of time.
Continuous Load - ANSWER Load where the maximum current is expected to
last for 3 hours or more.
LATEST UPDATED
Ampacity - ANSWER The maximum continuous current, in amperes, a
conductor is allowed to carry under usage conditions without exceeding its
temperature limit.
Appliance - ANSWER Device for use, commonly other than industrial,
generally made in standardized shapes or dimensions and installed or plugged in
whole to perform one or more functions such as cleaning garments, air
conditioning, food blending, deep-frying, and so on.
Appliance Branch Circuit - ANSWER A branch circuit supplying one or more
outlets to which appliances are to be connected and containing no permanently
installed luminaires other than those forming part of an appliance.
Approved - ANSWER Compliant to the authority having jurisdiction.
Arc-Fault Circuit Interrupter (AFCI) - ANSWER A circuit interrupter rated to
protect personnel from the damaging effects of arc faults by monitoring
characteristics unique to arcing and by acting on those characteristics to de-
energize the circuit when detecting an arc fault.
Authority Having Jurisdiction (AHJ) - ANSWER An office, organization, or
individual having jurisdiction to adopt, administer, and enforce codes or
standards, or to approve apparatus, materials, an installation, or a method.
Bonded (Bonding) - ANSWER Combined together to achieve electrical
continuity and conductance.
, Main Bonding Jumper - ANSWER The connection between the grounded
circuit conductor and the equipment grounding conductor at the service.
System Bonding Jumper - ANSWER 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 - ANSWER Those circuit conductors from the last overcurrent
device that protects the circuit to the outlet(s).
Building - ANSWER A building that is independent or one which is separated
from neighboring buildings by fire walls and which has all openings in the same
protected by approved fire doors.
Cabinet - ANSWER A box-shaped case which is either flush mounted or
surface mounted and is fitted with a frame, trim, or mat in which a swinging
door or doors are or can be hung.
Circuit Breaker - ANSWER A device designed for opening and closing a
circuit by nonautomatic means and for automatically opening the circuit on a
predetermined overcurrent without suffering damage to itself when used
properly within its rating.
Concealed - ANSWER Rendered inaccessible by building structure or finish.
Wires in concealed raceways are hidden, though they may become accessible by
pulling them out.
Continuous Duty - ANSWER Operating at a steady high load for an
indefinitely long period of time.
Continuous Load - ANSWER Load where the maximum current is expected to
last for 3 hours or more.
