Latest Discussions : Electrical & Lighting

Mseraphine

10:00PM | 12/08/17
Member Since: 12/08/17
1 lifetime posts
I have a really strange situation with an outlet on my front porch... I put up christmas lights a couple of weeks ago and everything was working fine until it rained. Since the rain my lights will turn on for a short period of time and then the GFCI in the garage will trip. It has not rained or snowed since the initial rain we had. Temperatures have stayed in the 30s or lower since then.

I have replaced the outlet in question with a brand new weather resistant outlet, and also replaced the GFCI in the garage.

Is it possible that there is still residual moisture or ice that is causing it to trip out?

This is driving me nuts not being able to figure this out.

BV015251

06:32PM | 12/15/17
I assume that your lights are on the same circuit as the garage GFCI. The GFCI is doing its job by shutting down the circuit due to even a relatively small power surge within the circuit, such as could be caused by moisture on your lighting harness. If the lights were on another circuit, not controlled by a GFCI, chances are that your lights would stay on, even with a small amount of moisture on them, unless of course the circuit breaker would trip due a significant short circuit.

This reminds me of a case where a refrigerator was on the same circuit that had a GFCI in it. Frequently, when the refrigerator cycled on, causing a temporary power surge, the GFCI would trip causing the entire circuit to shut down.


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