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Electrical Theory & Applications for HVACR
Glossary
Page 131
Edison base fuses
15, 20, and 30 amp fuses with the same style of base as incandescent bulbs
effecƟve voltage
a value of an AC sine wave voltage with the same heaƟng effect as an equal value of DC voltage;
Eeff = Epeak X 0.707
electrical charge
a basic property of elementary parƟcles of maƩer; a charge that can be either posiƟve or negaƟve;
like charges repel and unlike charges aƩract
electrical degree
one 360th of an alternaƟng current or voltage cycle
electricity
energy produced through the flow of electrons from one atom to another
electromagnet
a magnet made by passing current through a coil of wire wound around an iron core
electron
the part of an atom that carries a negaƟve charge
ELI
an acronym used to remember that voltage (E) in an inducƟve (L) circuit leads current (I) or current
lags voltage
EMF
abbreviaƟon for electromoƟve force
EMI
abbreviaƟon for electromagneƟc interference
EMT
abbreviaƟon for electrical metallic tubing (thin‐wall conduit)
end bell
the plate at the end of a motor that supports the bearings; also called an end shield or end plate
energize
to supply power or electron flow to an electrical circuit
Energy Efficiency RaƟo (EER)
the number of Btu produced per waƩ of electrical power consumed by an air condiƟoner