| Term | Description |
|---|---|
| Arc | A luminous glow formed by the flow of electric current through ionized air, gas or vapor between separated electrodes or contacts; a portion of the circumference of a circle |
| Arc Over Voltage | The minimum voltage required to create an arc between electrodes separated by a gas or liquid insulation under specified conditions |
| Arc Resistance | The degree to which a material opposes the formation of a conductive path |
| Area of Conductor | The size of a conductor cross section measured in circular mils, square inches, etc. |
| Armor | A braid or wrapping of metal, usually steel, used for mechanical protection (generally placed over the outer sheath) |
| Armored Cable | A cable having a metallic covering for protection against mechanical injury |
| ASA | The American Standards Association (former name of ANSI) |
| ASME | The American Society of Mechanical Engineers |
| ASP | A filled direct burial telephone cable used in areas subject to rodent attacks. It consists of a filled cable core, corrugated aluminum shield, corrugated steel tape, flooding compound and polyethylene jacket. |
| ASTM | The American Society for Testing and Materials |
| Attenuation | Power loss in an electrical system. In cables, generally expressed in dB per unit length (usually 100 ft.) |
| Audio Frequency | The range of frequencies audible to the human ear (usually 20-20,000 Hz.) |
| AWG | Abbreviation for American Wire Gauge |
| AWM | Designation for appliance wiring material |
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