| AWG | Abbrivation for American Wire Guage. |
| AWM | Designation for appliance wiring materials. |
| Alternating current | Electric current that continually reverses its direction. It is expressed in cycles per second (hertz of Hz). |
| Ambient Temperature | The Temperature of a medium (gas or liquid) surrounding the object. |
| American Wire Guage (AWG) | A Standard system for designating wire diameter. Also referred to as the Brown and Sharpe(B&S) wire guage |
| Ampacity | (See Current Carrying Capacity) |
| Ampere | The Unit of current. One ampere is the current flowing through one ohm of resistance at one volt potential. |
| Anneal | Relief of mechanical stress through heat and gradual cooling. Annealing copper renders it less brittle. |
| Audio Frequency | The range of frequencies audible to the human ear. Usually 20- 20,000 Hz. |
| Basic Protection | A commonly used industry term for partial surge protection, usually a single MOV protecting line-to-neutral (see Full Protection). |
| Braid | A fibrous or metallic group of filaments interwoven in cylindrical form to form a covering over one or more wires. |
| Breakdown | The Voltage at which the insulation Voltage between conductors breaks down. |
| Bunch Stranding | A Group of wires of the same diameter twisted together without a predetermined. |
