GFCI nuisance trips

Isolate leakage paths, shared neutrals, moisture, equipment, and wiring errors.

A GFCI trip indicates current imbalance; find leakage, shared return paths, moisture, wiring errors, or incompatible equipment rather than bypassing protection.

Likely causes

Neutral-to-ground connection downstream.
Shared/misrouted neutral.
Moisture or damaged insulation.
Normal equipment leakage that accumulates across loads.

Isolation

Unplug or disconnect loads methodically.
Inspect wet locations and neutral separation.
Test insulation only when equipment is safely isolated from damaging test voltage.

Common mistakes

Replacing the GFCI before locating the leakage path.
Combining neutrals from different protected circuits.
Meggering connected electronics.

Verification

Restore one load at a time, use the device test function, and document the faulted load or wiring correction.