Definitions Applicable to 29 CFR Subpart V cont'd

DOE-HDBK-1092-2004

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).

Designated employee--The term means a qualified person delegated to perform specific

duties under the conditions existing.

Effectively grounded--The term means intentionally connected to earth through a ground

connection or connections of sufficiently low impedance and having sufficient current-carrying

capacity to prevent the buildup of voltages which may result in undue hazard to connected

equipment or to persons.

Electric line trucks--The term means a truck used to transport men, tools, and material, and to

serve as a traveling workshop for electric power line construction and maintenance work. It is

sometimes equipped with a boom and auxiliary equipment for setting poles, digging holes,

and elevating material or men.

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