N-Link - Refer to Fuse Link, Type N.
NEMA - National Electrical Manufacturers Association.
Neutral - That conductor (when one exists) of
a polyphase (multi-phase) circuit or single-phase, 3-wire circuit
which is intended to have a voltage such that the voltage differences
and each of the other conductors are approximately equal in magnitude
and are equally spaced in phase, or
the junction point of the legs in a Wye circuit.
Neutral Grounding Resistor - A grounding device,
the principal element of which is resistance, which is used to
connect the neutral point of the transformer to earth.
Noncombustible Construction - That type of construction
in which a degree of fire safety is attained by the use of noncombustible
materials for structural members and other building assemblies.
Non-Incendive Circuit - A circuit in which any
spark or thermal effect that may occur under normal operating conditions
or due to opening, shorting, or grounding of field wiring, is incapable
of causing an ignition of the prescribed flammable gas or vapour.
Nonmetallic Conduit - see definition for Conduit.
Non-Relocatable Structure - A factory-built unit
for use on permanent foundations.
Nonventilated Cable Tray - see definition for
Normal Duty - A classifying current category
for distribution equipment.