FX Transformer GFCI Nuisance Trips: Moisture and Shared Loads

Before replacing an FX transformer, reset the GFCI and inspect cable entries for water. Nuisance trips track with rain events and with extension cords feeding multiple seasonal loads.

Dedicated outdoor GFCI for the landscape transformer is worth the electrician visit on problem sites.

Measure secondary voltage under load. A healthy transformer with a shorted fixture leg still looks "dead" at the path light.