Chap 1 Definitions

An accessory such as locknut, bushing, or other part of a wiring system that is intended primarily to perform a mechanical rather than an electrical function

Performing a function without the necessity of human intervention

A generic term for a group of nonflammable synthetic chlorinated hyfrocarbons used as electrical insulating media.

A unit of an electrical system, other than a conductor, that is intended to carry or control but not utilize electric energy.

A protective device for limiting surge voltages by discharging or bypassing surge current; it also prevents continued flow of follow current while remaining capable of repeating these functions.

A point on the wiring system at which current is taken to supply utilization equipment.

A complete lighting unit consisting of lamp or lamps together with the parts designed to distribute the light, to position and protect the lamps and ballast (where applicable), and to connect the lamps to the power supply.

A general term including material fittings, devices, appliances, luminaires, apparatus, and the like used as a part of, or in connection with, an electrical installation.

A compartment or chamber to which one or more air ducts are connected and that forms part of the air distribution system.

Constructed or protected so that exposure to the weather will not interfere with successful operation.