OK so I had some time to look at this today and this is my finding... I hope I can explain in words well enough for you to see what's going on.
OK so I have a circuit that includes the following:
Pool Light, Pool Area Lights (there the brick lights), Heater, Robot Aux Pump.
There is a GFCI breaker in my basement that runs it. and there is a switch on my wall in the house that turns the lights on. There is a switch at the equipment pad for the heater and the Robot Aux Pump.
Problem works as follows:
When I get moisture in the ground from rain, sometimes from sprinkler system. the breaker will flip off if I turn on the lights.
Note:
if I don't touch the lights the heater, Aux Pump work fine.
Testing:
I removed the Pool area lights from the circuit (Junction Box At Pad). When I flip the switch the pool light comes on and breaker does not trip.
Conclusion:
Something in that perimeter pool area lighting is shorting, or moisture is getting to it and tripping the GFCI. I can see the wire coming into the junction box that I am pretty sure powers the lights in the wall (same ones I disconnected). is there something I can do to test which wire is at fault? What can I test? Do I need to dig it all up?
My understanding is that in the brick wall there are like 5 lights, each daisy chained to the next and then one run to that junction box to connect to that same circuit. I am guessing this is water trapped behind the wall and somehow getting into the light enough to trip the breaker...
If everything dries out I can turn it all on fine... it’s just when it rains more or less that the situation pops up.
Right now I have the wires disconnected and am testing it to be sure that it’s not going to trip the breaker as is... but I don't think it will.
Not sure if it could be anything else, like amp draw or something like that?
Thoughts?
these things drive me nuts, I will be thinking about it till I find the problem... I like my lights on the wall... need them to get sorted out.