Lights Tripping GFCI Problem

[JohnT]

My lights, when turned on, are tripping the GFCI after they have been on for about 5 minutes. I have Jandy dimmer relays installed between the GFCI and the light circuit. Has anyone else had this problem? I changed the GFCI and it still does it. It seems odd to me that there would be a delay, because if there were a ground fault, it would be instant. Anybody got any ideas?

You are thinking like I would. Changing the GFCI would have been my first and second guess. The delay seems really odd. Once it trips, what happens when you reset it? Another 5 minute delay? Sure doesn't sound like a ground fault if so.

Is it an outlet or a breaker type GFCI?

Anything else on the line that could be causing an unusual load?