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| DOE-HDBK-1092-98
Concealed--Rendered inaccessible by the structure or finish of the building. Wires in concealed
raceways are considered concealed, even though they may become accessible by withdrawing them.
[See "Accessible. (As applied to wiring methods.)"]
Conductor--
Bare. A conductor having no covering or electrical insulation whatsoever.
i.
ii. Covered--A conductor encased within material of composition or thickness that is not
recognized as electrical insulation.
iii. Insulated--A conductor encased within material of composition and thickness that is recognized
as electrical insulation.
Conduit body--A separate portion of a conduit or tubing system that provides access through a
removable cover(s) to the interior of the system at a junction of two or more sections of the system
or at a terminal point of the system. Boxes such as FS and FD or larger cast or sheet metal boxes are
not classified as conduit bodies.
Controller--A device or group of devices that serves to govern, in some predetermined manner, the
electric power delivered to the apparatus to which it is connected.
Cooking unit, counter-mounted--A cooking appliance designed for mounting in or on a counter and
consisting of one or more heating elements, internal wiring, and built-in or separately mountable
controls. (See "Oven, wall-mounted.")
Covered conductor--See "Conductor."
carrier, or disconnecting blade. The fuseholder or fuse carrier may include a conducting element
(fuse link), or may act as the disconnecting blade by the inclusion of a nonfusible member.
Cutout box--An enclosure designed for surface mounting and having swinging doors or covers
secured directly to and telescoping with the walls of the box proper. (See "Cabinet.")
Damp location--See "Location."
Dead front--Without live parts exposed to a person on the operating side of the equipment.
Device--A unit of an electrical system which is intended to carry but not utilize electric energy.
Dielectric heating--Dielectric heating is the heating of a nominally insulating material due to its own
dielectric losses when the material is placed in a varying electric field.
Disconnecting means--A device, or group of devices, or other means by which the conductors of
a circuit can be disconnected from their source of supply.
B-8
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