The accumulation of moisture is another major cause of GFCI tripping. Outdoor installations are the most vulnerable, and rain is the most common culprit. … The presence of moisture can expose you to the risk of accidental electric shock.

Will a GFCI trip if wet?

If the problem GFCI is an outdoor receptacle or an indoor outlet that was exposed to water in some way, moisture inside the receptacle box could be causing the GFCI to trip. A wet GFCI will trip regardless of what is plugged into it and may continue to trip even if there is no visible moisture inside the box.

Can rain cause a breaker to trip?

When extension cords are left outside over time, they can become frayed or cracked. Water from a sprinkler or rainstorm can make its way in, causing a short and making the circuit breaker trip.