NEC Article 100 Flashcards

Cabinet

An enclosure that is designed for either surface mounting or flush mounting and is provided with a frame, mat, or trim in which a swinging door or doors are or can be hung.

Circuit Breaker

A device designed to open and close a circuit by nonautomatic means and to open the circuit automatically on a predetermined overcurrent without damage to itself when properly applied within its rating.

Clothes Closet

A non-habitable room or space intended primarily for storage of garments and apparel.

Concealed

Rendered inaccessible by the structure or finish of the building. Wires in concealed raceways are considered concealed, even though they may become accessible by withdrawing them.

Conductor, Bare

A conductor having no covering or electrical insulation whatsoever.

Conductor, Insulated

A conductor encased within material of composition and thickness that is recognized by this Code as electrical insulation.

Conduit Body

A separate portion of a conduit or tubing system that provides access through a removable cover(s) to the interior of the system at a junction of two or more sections of the system or at a terminal point of the system.

Continuous Load

A load where the maximum current is expected to continue for 3 hours or more.

Cooking Unit, Counter-Mounted

A cooking appliance designed for mounting in or on a counter and consisting of one or more heating elements, internal wiring, and built-in or mountable controls.

Copper-Clad Aluminum Conductors

Conductors drawn from a copper-clad aluminum rod with the copper metallurgically bonded to an aluminum core. The copper forms a minimum of 10 percent of the cross-sectional area of a solid conductor or each strand of a stranded conductor.

Cutout Box

An enclosure designed for surface mounting that has swinging doors or covers secured directly to and telescoping with the walls of the box proper.

Dead Front

Without live parts exposed to a person on the operating side of the equipment.

Demand Factor

The ratio of the maximum demand of a system, or part of a system, to the total connected load of a system or the part of the system under consideration.

Device

A unit of an electrical system that carries or controls electric energy as its principal function.

Disconnecting Means

A device, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply.

Dust-tight

Constructed so that dust will not enter the enclosing case under specified test conditions.

Duty, Continuous

Operation at a substantially constant load for an indefinitely long time.

Duty, Intermittent

Operation for alternate intervals of (1) load and no load; or (2) load and rest; or (3) load, no load, and rest.

Dwelling, One-Family

A building that consists solely of one dwelling unit.

Dwelling, Two-Family

A building that consists solely of two dwelling units.