Definitions cont'd - hdbk10920278

DOE-HDBK-1092-98

Automatic circuit recloser--A self-controlled device for interrupting and reclosing an alternating

current circuit with a predetermined sequence of opening and reclosing followed by resetting, hold-

closed, or lockout operation.

Barricade--A physical obstruction such as tapes, cones, or A-frame type wood or metal structures

intended to provide a warning about and to limit access to a hazardous area.

Barrier--A physical obstruction which is intended to prevent contact with energized lines or

equipment or to prevent unauthorized access to a work area.

Bond--The electrical interconnection of conductive parts designed to maintain a common electrical

potential.

Bus--A conductor or a group of conductors that serve as a common connection for two or more

circuits.

Bushing--An insulating structure, including a through conductor or providing a passageway for such

a conductor, with provision for mounting on a barrier, conducting or otherwise, for the purposes of

insulating the conductor from the barrier and conducting current from one side of the barrier to the

other.

Cable--A conductor with insulation, or a stranded conductor with or without insulation and other

coverings (single-conductor cable), or a combination of conductors insulated from one another

(multiple-conductor cable).

Cable sheath--A conductive protective covering applied to cables.

NOTE: A cable sheath may consist of multiple layers of which one or more is conductive.

Circuit--A conductor or system of conductors through which an electric current is intended to flow.

Clearance (between objects)--The clear distance between two objects measured surface to surface.

Clearance (for work)--Authorization to perform specified work or permission to enter a restricted

area.

Communication lines--(See Lines, communication.)

Conductor--A material, usually in the form of a wire, cable, or bus bar, used for carrying an electric

current.

Covered conductor--A conductor covered with a dielectric having no rated insulating strength or

having a rated insulating strength less than the voltage of the circuit in which the conductor is used.

Current-carrying part--A conducting part intended to be connected in an electric circuit to a source

of voltage. Non-current-carrying parts are those not intended to be so connected.

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