Definitions cont'd - hdbk10920287

DOE-HDBK-1092-98

a. Class III, Division 1--A Class III, Division 1 location is a location in which easily ignitable fibers

or materials producing combustible flyings are handled, manufactured, or used.

NOTE: Easily ignitable fibers and flyings include rayon, cotton (including cotton linters and cotton

waste), sisal or henequen, istle, jute, hemp, tow, cocoa fiber, oakum, baled waste kapok, Spanish

moss, excelsior, sawdust, woodchips, and other material of similar nature.

b. Class III, Division 2--A Class III, Division 2 location is a location in which easily ignitable fibers

are stored or handled, except in process of manufacture.

Collector ring--A collector ring is an assembly of slip rings for transferring electrical energy from

a stationary to a rotating member.

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-

a. Bare--A conductor having no covering or electrical insulation whatsoever.

b. Covered--A conductor encased within material of composition or thickness that is not recognized

as electrical insulation.

Insulated--A conductor encased within material of composition and thickness that is recognized

as electrical insulation.

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.

Covered conductor--See "Conductor."

Cutout--(Over 600 volts, nominal.) An assembly of a fuse support with either a fuseholder, fuse

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.

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.

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