The line vs. load mistake almost everyone makes On a GFCI receptacle, the “line” terminals are meant for the incoming power feed, and the “load” terminals are optional outputs that extend protection ...
Fig 1. Placing this two-terminal circuit between a GFCI line-load terminal and ground creates an adjustable line-voltage limiter. Fig 2. With the trip point set at 133 V rms, the circuit draws less ...
GFCI protection requires extra attention in a construction environment. The GFCI has no doubt saved many people from electrocution, so it would be easy to start thinking GFCIs will always protect you.