A confounding situation.
Setup: Two pool lights (500W), one Spa light, Jandy controller with wired remote in house. Pool lights on their own relay, spa on another.
Problem: Pool lights will trip the GFCI almost always. Spa light works. When we can get the pool lights on, turning spa light on will trip GFCI always.
Detail: We recently had one of the two pool lights replaced after it being out for awhile (full fixture replacement). He also replaced the lens and gasket on the other light, which was working before.
Pool installer couldnít get lights to not trip GFCI, told us it needed replacing. Had electrician come out, replaced GFCI, no change in results.
The pool lights will immediately trip the GFCI, but if you keep resetting and trying, they will go on. Then, they (at least sometimes) can be turned on and off in succession without tripping. Any time you add the spa light it trips - no way to get the three to work.
Electrician spent nearly two hours with me. We tried each light by itself, on other relays in the Jandy. All lights work independently. One pool light and the spa light will work.
The new pool light goes to one junction box where the spa light also goes. The second pool light (the one whose fixture wasnít replaced) goes to the main circuit panel where the breakers are. Electrician confirmed the first pool light and spa light shared neutral.
It seems I can get the two pool lights to work by cycling the tripping and reset 3-5 times. Then it will work and stay on indefinitely. It will turn on and off if you do it shortly after getting the lights on. If you wait awhile and turn off an on, it will trip. Almost like itís a heat issue (Iím not an electrician) - where the GFCI tripping allows it to accept the circuit when itís been used/hotter.
When trying to get all three lights on, adding the spa light when the pool lights are on (when we can get them working) the GFCI trips about one second after hitting the spa light switch. When done in reverse (spa light on, add pool lights) it immediately trips.
I think Iíve covered all the permutations. The electrician left in the evening scratching his head.
Any thoughts or ideas? Thank you.