TM 5-3895-374-24-1ELECTRICAL POWER REQUIREMENTSELECTRICAL WIRINGRefer to the air compressor’s serial label for the unit’svoltage and amperage requirements. Ensure that allwiring is done by a qualified electrician, In accordancewith the National Electrical Code. Use electrical conduitto protect the wiring to the compressor, and between themagnetic starter, pressure switch, and motor.MAIN POWER PANELProvide circuit breaker or fuse protection at your mainpower panel.MAIN POWER DISCONNECTInstall a main power disconnect in the line from the panelto the compressor. The disconnect must be located nearthe compressor, for ease of use and safety. Whenturned OFF, the disconnect shuts off all power to thecompressor. When it is turned ON, the compressor willstart and stop automatically, as directed by the pressureswitch.USE A DEDICATED CIRCUITFor best performance and reliable starting, the aircompressor must be installed on a dedicated circuit, asclose as possible to the electrical power panel. Lowvoltage will cause difficult starting or an overload Lowvoltage can be caused by a low supply voltage from thelocal power company, other equipment running on thesame line, or inadequate wiring If any other electricaldevices are drawing from the compressor’s circuit, It mayfall to start.Low voltage to the compressor can be caused by toosmall a wire size for the distance between thecompressor and the power source. The longer thedistance, the larger the wire diameter must be, toovercome the inherent voltage loss caused by the wireresistance Refer to the National Electrical Code todetermine proper wire size for your circuit.If the wiring Is not adequate, the voltage will drop from 20to 40 volts at startup. Low voltage or an overloadedcircuit can result in sluggish starting that causes themagnetic starter or circuit breaker to trip, especially Incold conditions. Use time delay fuses on the circuit,because the compressor will momentarily draw severaltimes its specified amperage when first started.200-2009(page 3-631)
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