Definitions Applicable to 29 CFR 1926 Subpart K cont'd

DOE-HDBK-1092-2004

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.

Disconnecting (or Isolating) switch--(Over 600 volts, nominal.) A mechanical switching device

used for isolating a circuit or equipment from a source of power.

Dry location--See "Location."

Enclosed--Surrounded by a case, housing, fence or walls which will prevent persons from

accidentally contacting energized parts.

Enclosure--The case or housing of apparatus, or the fence or walls surrounding an installation

to prevent personnel from accidentally contacting energized parts, or to protect the equipment

from physical damage.

Equipment--A general term including material, fittings, devices, appliances, fixtures, apparatus,

and the like, used as a part of, or in connection with, an electrical installation.

Equipment grounding conductor--See "Grounding conductor, equipment."

Explosion-proof apparatus--Apparatus enclosed in a case that is capable of withstanding an

explosion of a specified gas or vapor which may occur within it and of preventing the ignition of

a specified gas or vapor surrounding the enclosure by sparks, flashes, or explosion of the gas or

vapor within, and which operates at such an external temperature that it will not ignite a

surrounding flammable atmosphere.

Exposed--(As applied to live parts.) Capable of being inadvertently touched or approached

nearer than a safe distance by a person. It is applied to parts not suitably guarded, isolated, or

insulated. (See "Accessible" and "Concealed.")

Exposed--(As applied to wiring methods.) On or attached to the surface or behind panels

designed to allow access. [See "Accessible. (As applied to wiring methods.)"]

Exposed--(For the purposes of 1926.408(d), Communications systems.) Where the circuit is in

such a position that in case of failure of supports or insulation, contact with another circuit may

result.

Externally operable--Capable of being operated without exposing the operator to contact with

live parts.

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