Definitions cont'd - hdbk10920295

DOE-HDBK-1092-98

Bond--The term means an electrical connection from one conductive element to another for the

purpose of minimizing potential differences or providing suitable conductivity for fault current or

for mitigation of leakage current and electrolytic action.

Bushing--The term means 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 purpose of insulating the conductor from the barrier and conducting current from one side of

the barrier to the other.

Cable--The term means 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--The term means a protective covering applied to cables.

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

Circuit--The term means a conductor or system of conductors through which an electric current is

intended to flow.

Communication lines--The term means the conductors and their supporting or containing structures

which are used for public or private signal or communication service, and which operate at potentials

not exceeding 400 volts to ground or 750 volts between any two points of the circuit, and the

transmitted power of which does not exceed 150 watts. When operating at less than 150 volts no limit

is placed on the capacity of the system.

NOTE: Telephone, telegraph, railroad signal, data, clock, fire, police-alarm, community television

antenna, and other systems conforming with the above are included. Lines used for signaling

purposes, but not included under the above definition, are considered as supply lines of the same

voltage and are to be so run.

Conductor--The term means a material, usually in the form of a wire, cable, or bus bar suitable for

carrying an electric current.

Conductor shielding--The term means an envelope which encloses the conductor of a cable and

provides an equipotential surface in contact with the cable insulation.

Current-carrying part--The term means 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.

Dead (deenergized)--The term means free from any electrical connection to a source of potential

difference and from electrical charges: Not having a potential difference from that of earth.

NOTE: The term is used only with reference to current-carrying parts which are sometimes alive

(energized).

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