ECN Forum Forums General Topics of the Trade General Discussion Area Circuits and GFCI - 70s code

I started electrical work around 1976 and I don't remember GFCI receptacles back then. I believe they came out late '70's early '80's around here. They were very big and came with a box extender. It almost looked like a "goof" plate. It stuck out of the wall about 1/4".