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Old 02-20-2010, 10:55 AM   #1
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Another puzzling question about GFCI outlet


I have installed about 10 GFCI Recepticles throughout my home. I know how to wire them.
This particular outlet protects two outlets at the kitchen sink, two lower mounted outlets, and three small undercounter florescent fixtures. The outlet trips when the lights are turned OFF. I have replaced all three undercounter fixtures and the light switch. These new fixtures have a switch on them and I have tried isolation. With all fixtures off, the outlet will not trip.
I have checked all wiring and no situations like, ground touching neutral, exists.
Why would a GFCI trip when power is switched off?
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Old 02-20-2010, 12:12 PM   #2
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Have you tried replacing the GFI?
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Old 02-20-2010, 12:39 PM   #3
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Only at the moment the light is switched off?

Or again when you push the reset button and the light is still off?

It is possible for a fluorescent light to release a small surge into the line as the light is turned off and this might trip a GFCI.
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Old 02-20-2010, 01:00 PM   #4
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Quote:
Originally Posted by AllanJ View Post
Only at the moment the light is switched off?

Or again when you push the reset button and the light is still off?

It is possible for a fluorescent light to release a small surge into the line as the light is turned off and this might trip a GFCI.
Yes-- I have experienced that in the past. That's one reason I replaced the fixtures.
The outlet doesn't trip every time the lights are TURNED OFF. Once in four or five cycles, which is too many.
I may have to run the lights from a non protected circuit, which I rather not do in the kitchen.
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