A few years ago, I had my kitchen renovated. This included replacing the old overhead light (regular bulbs) with halogen lights (the dangling kind). Everything worked well.
Recently, I've noticed something really bizarre. When I turn on the halogen lights, one of the GFC interrupters trips. The GFC outlet is a few feet to the left of the light switch. The bizarre part is that the GFC outlet is on a completely different circuit than the halogen lights. Yes, I've tested this with the breaker.
If I turn the light on, reset the GFC, and then turn the light off and on quickly (1-2 second delay), the circuit doesn't trip. If I wait longer, it trips. The transformer for the halogen obviously needs a second or so to "power up", so this is a clue.
There are two switches for this light, on either side of the kitchen. Both switches cause the GFC outlet to trip, so it's not the switch. Just to make sure, I checked the switch that's closest to the outlet, and the wiring looked OK (although for some reason, it is a 4-way switch, despite the fact that there are only two switches for the light)
The only thing I can think of is that the wires from both circuits run side by side in the ceiling, and the transformer is somehow generating a field that causes the GFC outlet to trip. Is this in the same category as aliens-have-infestated-my-house or is this at least a remotely plausible explanation?
I could test this theory by wiring a regular light instead of the halogen light, and see if it still trips. Before I climb onto the countertop, I'd like to make sure I'm going in the right direction.
Any advice greatly appreciated.