Glossary of Terms 5 About Wiring Harnes


A female flange mounted wiring device with the conducting elements recessed behind the mating
surface. Often referred to as an outlet. This type of device is normally wired to be live when nothing is
plugged in to it. Therefore, receptacles are wired to the source of power.

Restriction of Hazardous Substances; A European directive dictating materials that may not be used in
the manufacture of certain products. Materials restricted include: Lead, Mercury, Cadmium, Hexavalent
Chromium, Polybrominated Byphenyls, and Plybrominated Diphenyl Ether.

The designation to Remove Outer Jacket.

The designation to separate insulated parallel wires.

Straight Blade
Refers to a NEMA device with straight prongs.

The designation of the removal of the insulation or jacket from a conductor/wire.

Temperature Rating
The maximum temperature at which insulation will maintain its integrity.

A terminal is the point at which a conductor from an electrical component, device or network comes to
an end and provides a point of connection to external circuits. A terminal may simply be the end of a
wire or it may be fitted with a connector or fastener. The connection may be temporary, as for portable
equipment, or may require a tool for assembly and removal, or may be a permanent electrical joint
between two wires or devices.

Refers to a NEMA device with circular prongs that locks the connection in place. Locking connectors
use curved blades. Once pushed into the receptacle, the plug is twisted and its now-rotated blades latch
into the receptacle. To unlatch the plug, the rotation is reversed. The locking coupling makes for a more
reliable connection in commercial and industrial settings, where vibration or incidental impact could
disconnect a non-locking connector.

Underwriters Laboratories; An independent non-profit product safety and certification organization.

The force or “push” driving electrical energy through a conductor or wire that can be compared to the
pressure of water in a pipe.

A unit of power, defined as one joule per second. Wattage is calculated as Voltage x Amperage.

Wire Harness
See: cable harness. Also known as Wiring Assembly and Wiring Loom.

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