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Ambient (Amb)-
The temperature of the space around motor
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Air-Over
Motors intended for fan and stream blower service. Must be located in the air stream to provide motor cooling.
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Effeciency-
The ratio of output power divided by input power; usually expressed as a percentage.
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Dripproof (DP)
Ventilation openings in end shields & shell placed so drops of liquid falling within an angle of 15 degrees. from vertical will not affect performance. Usually used indoors, fairly clean locations.
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Totally Enclosed (TE)
NO Ventilation openings in motor housing (but not airtight or waterproof). Used in locations which are dirty, damp, oily, etc.
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Totally enclosed, Fan Cooled (TEFC)
Includes an external fac, in a protective shroud, to blow cooling over the motor.
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Totally Enclosd, Nonventilated (TENV)
Not equipped with an external cooling fan. Depends on convection air for cooling.
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Totally Enclosed, Air Over (TEAO)
Air flow from driven or external device provides cooling air flow over the motor.
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Hazardous Location (Explosion Proof EXPRF)
A totally enclosed motor designed to withstand an internal explosion of specified gases or vapors, and not allow the internal flame or explosion to escape.
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Full-Load Amps (F/L Amps)
Line Current (amperage) drawn by a motor when operating at rated HP and voltage. Shown on motor nameplat. Important for proper wire size selection and motor starter heater selection.
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Frame
Usually refers to the NEMA system of standardized motor mounting dimensions, which facilitates replacement.
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