Pool Lighting GFCI Tripping

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andy s.

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I stopped by a friends place and was told that his lighting doesn't work anymore. I checked the circuits by unwiring the connections and individually checking the ohms on each one. I noticed that the ohms were around six to ground. I then re-attached the circuits individually to have each time the GFCI tripping out. I also proved to the owner that the GFCI was not at fault by plugging a big floor fan to the circuit thus causing no trip out. Could the wiring have been compromised with the underwater lighting? And I personally don't feel comfortable with 120 volt lighting versus low voltage such as 12 volt DC. Any suggestions??
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Re: Pool Lighting GFCI Tripping

Or the wire feeding to it. I have seen where the conduit will get water in it and the hot wire might have just a little nick in it. but it does sound like the fixtures have been compromised and will have to be resealed but when you get them apart and dried out recheck the wires to be sure.
 
Re: Pool Lighting GFCI Tripping

If this is outdoor landscape lights i would suspect wiring.Far too often it isn't barried enough and shovels will hit it.
 
Re: Pool Lighting GFCI Tripping

Six ohms to ground or six ohms to neutral there is a problem and the 20 amp circuit shouldn't hold in any event, GFCI or breaker (in theory) tripping.

Roger
 
Re: Pool Lighting GFCI Tripping

Are these wet niche line voltage fixtures? If they are, look in the lens and see if water has breached the gasket. this is not too uncommon for these as a swimmer can sometimes just push off one and cause the lens to slip. If it looks dry then you might have a bad wires in the ground. Hope they were installed in conduit as the NEC requires.
 
Re: Pool Lighting GFCI Tripping

In a wet niche fixture the conduit leading to the deck box is supposed to have water in it. Any small imperfection in the wiring will lead to a trip.
 
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