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Old 06-22-2014, 02:38 PM   #4
_Ogre
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Join Date: Jan 2012
Location: Motown
Posts: 7,680
Re: Compressor Motor Sparking on Start

single phase motors have a start winding and switch, the switch is centrifical; closes when the motor stops and opens after a certain rpm
the start winding gets the motor turning in the correct direction and then opens the switch
the opening of the switch is what your seeing

and no, you wouldn't want to use it in an explosive atmosphere as you can also see a spark at your pressure switch
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