Old 05-11-03, 06:18 AM
red harris
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how does a single wire, self grounding switch work as a stop/run switch
Old 05-11-03, 07:40 AM
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Huh !
Old 05-11-03, 12:52 PM
Join Date: Feb 2002
Location: port chester n y
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A single control-wire can operate or release a relay or contactor. This circuit requires a resistor in series with the operating coil and the single control wire connects to a momentary-contact SPDT switching device.

One of the coil leads is connected to "Ground" and the relay will release when the other coil lead is switched to "Ground" which results in Zero volts across the operating coil.

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