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Electrical Glossary: A Detailed Glossary of All Electrical Terms

Choose a letter below to navigate to the definition you're looking for:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

 

 

[A]

 

 

Acid Rain:

Rain that has become acidic due to the emission of sulfur dioxide and nitrogen oxides.

 

 

 

Air Leakage Rating:

The air leakage rating is a measure of how much air leaks through the crack between the window sash and frame. The rating reflects the leakage from a window exposed to a 25-mile-per-hour wind, and is measured in cubic feet per minute per linear foot of sash crack.

 

 

 

Alternating Current (AC):

Electric current which changes direction with a regular frequency. Domestic mains in the UK have a frequency of 50 Hertz.

 

 

 

Alternator:

An electric generator designed to produce alternating current. Usually consists of rotating parts which created the changing magnetic field to produce the alternating current.

 

 

 

Ambient Temperature:

The surrounding temperature of an area.

 

 

 

American Wire Gauge:

A standard measure which represents the size of wire. The larger the number, the smaller the wire. Abbreviated AWG.

 

 

 

Ampacity:

The current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.

 

 

 

Ampere:

A type of electric current produced by one volt applied across a resistance of one ohm. It is also equal to the flow of one coulomb per second.   Named after French physicist Andre M. Ampère 1836.

 

 

 

Analog:

A measuring or display methodology which uses continuously varying physical parameters. In contrast, digital represents information in discrete binary form using only zeros and ones.

 

 

 

Annual Fuel Utilization Efficiency (AFUE):

An indication of how well a furnace converts energy into usable heat. The rating is expressed as a percentage of the annual output of heat to the annual energy input to the furnace.

 

 

 

Appliance:

Utilization equipment, generally other than industrial, normally built in standardized sizes or types, that is installed or connected as a unit to perform one or more functions such as clothes washing, air conditioning, food mixing, deep frying, etc.

 

 
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