Voltage drop

Old 03-08-04, 09:43 AM
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Question Voltage drop

One circuit of the house has been experiencing an intermittent voltage drop 115 down to about 100V. When this happens, the lights dim and brighten about every second for about five minutes. This circuit is protected by a gfi plug. Any suggestions on where to start looking?
Old 03-08-04, 10:10 AM
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Is there a motorized appliance running on this circuit when this occurs? Certain Whirlpool washers have been known to cause this exact condition. Also check for loose connections between panel and all devices on the circuit.
Good Luck
Old 03-08-04, 10:35 AM
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No motors

There is nothing on this circuit except lighting and a computer (surge protected). I was wondering if it could be the gfi or breaker as this happens daytime and nightime. Does this sound possible?
Old 03-08-04, 11:00 AM
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Is the voltage drop confined to just this one circuit? If not, call your power company.

Dimming this severe is unusual. It indicates a high-resistance connection somewhere on the circuit. High resistance means high heat. High heat means fire hazard.

I'm guessing there is something else on this circuit that you have not yet identified. A clothes iron, a pump somewhere, ... Do further investigation to be sure you know what's on this circuit. Often that means shutting off the breaker and testing everything in the house to see what no longer has power.

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