Electrical Glossary: A Detailed
Glossary of All Electrical Terms
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Rain that has become acidic
due to the emission of sulfur dioxide and nitrogen
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.
Electric current which changes
direction with a regular frequency. Domestic mains in
the UK have a frequency of 50 Hertz.
An electric generator designed
to produce alternating current. Usually consists of
rotating parts which created the changing magnetic field
to produce the alternating current.
The surrounding temperature of
A standard measure which
represents the size of wire. The larger the number, the
smaller the wire. Abbreviated AWG.
The current, in amperes, that
a conductor can carry continuously under the conditions
of use without exceeding its temperature rating.
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
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.
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.
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.