Definitions cont'd - hdbk10920275

DOE-HDBK-1092-98

Separately derived system--A premises wiring system whose power is derived from generator,

transformer, or converter winding and has no direct electrical connection, including a solidly

connected grounded circuit conductor, to supply conductors originating in another system.

Service--The conductors and equipment for delivering energy from the electricity supply system to

the wiring system of the premises served.

Service cable--Service conductors made up in the form of a cable.

Service conductors--The supply conductors that extend from the street main or from transformers

to the service equipment of the premises supplied.

Service drop--The overhead service conductors from the last pole or other aerial support to and

including the splices, if any, connecting to the service-entrance conductors at the building or other

structure.

Service-entrance cable--Service-entrance cable is a single conductor or multiconductor assembly

provided with or without an overall covering, primarily used for services and of the following types:

Type SE, having a flame-retardant, moisture-resistant covering, but not required to have inherent

protection against mechanical abuse.

ii. Type USE, recognized for underground use, having a moisture-resistant covering, but not

required to have a flame-retardant covering or inherent protection against mechanical abuse.

Single-conductor cables having an insulation specifically approved for the purpose do not

require an outer covering.

Service-entrance conductors, overhead system--The service conductors between the terminals of

the service equipment and a point usually outside the building, clear of building walls, where joined

by tap or splice to the service drop.

Service entrance conductors, underground system--The service conductors between the terminals

of the service equipment and the point of connection to the service lateral. Where service equipment

is located outside the building walls, there may be no service-entrance conductors, or they may be

entirely outside the building.

Service equipment--The necessary equipment, usually consisting of a circuit breaker or switch and

fuses, and their accessories, located near the point of entrance of supply conductors to a building or

other structure, or an otherwise defined area, and intended to constitute the main control and means

of cutoff of the supply.

Service raceway--The raceway that encloses the service-entrance conductors.

Shielded nonmetallic-sheathed cable--Type SNM, shielded nonmetallic-sheathed cable is a factory

assembly of two or more insulated conductors in an extruded core of moisture-resistant, flame-

resistant nonmetallic material, covered with an overlapping spiral metal tape and wire shield and

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