A

Asbestos-insulated, no braid, for dry locations only. In raceways, only for leads to or within apparatus. Limited to 300V, 200°C.

A/D

Analog to digital signal conversion

AA

Asbestos-insulated, asbestos or glass braid. Dry locations only. Open wiring. In raceways, only for leads to or within apparatus. Limited to 300V, 200°C.

AAA

Aluminum Association of America

AAAC

All aluminum alloy conductor, usually used to refer to 6201 aluminum alloy.

AAC

Aluminum Alloy Conductors

AAR

American Association of Rail Roads

AASC

Aluminum Alloy Stranded Conductors

AB

High-voltage butyl cable.

ABC

Armored bushed cable. BX-armored building wire with polyvinyl chloride insulation, 600V

ABP

Butyl-polyethylene high voltage cable, 75°C.

Abrasion Resistance

Ability of material or cable to resist surface wear.

ABS

Acrylonitrile butadiene styrene

Absolute Pressure (PSIA)

Pressure measured relative to a vacuum (absolute zero).

Absorption

The property of materials such as clothing, drapes, carpeting on racks, acoustic ceilings, etc., which causes them to soak up or deaden sound.

AC

Branch circuit and feeder cables with flexible metal tape armor.

AC adapter

A device intended to convert line voltage alternating current to low voltage AC or DC current.

AC Input Mode

An I/O module that converts various AC signals originating at user devices to the appropriate logic level signal for use within the processor of a programmable controller.

AC Output Module

An I/O module that converts the logic level signal of the processor to a usable output signal to control a user AC device.

ACA

Synthetic tapes, felted asbestos, glazed cotton or glass braid, 1000V, 90°C.

ACAR

Aluminum Conductor Alloy Reinforced

Accelerated Aging

A test performed on material or cable meant to duplicate long time environmental conditions in a relatively short space of time.

Accelerator

A chemical additive which hastens a chemical reaction under specific conditions.

Accent Lighting

directional lighting to emphasize a particular object or dawa attention to a part of the field of view.

Accuracy

The total of all deviations from a specified straight line including the sum of nonlinearity, repeatability, and hysteresis expressed as a percent of full scale output.