bdosborn wrote:It looks like grounded NM *might* have been a requirement in 1958 but grounded receptacles throughout weren't required until 1975. There were a few areas that grounded receptacles were required in 1959.
https://forums.mikeholt.com/threads/when-were-ground-wires-1st-required.61410/
My guess is the EC was using what he had on hand rather than it being required. Or your Dad was a forward thinker. I'd also guess there are a bunch of spots where the neutral and ground wires are tied together in her house.
Bruce
(Hope they didn't use 16 anywhere...
JasenC wrote:Are they metal boxes and was the ground hooked to them.
As others said, that's border line of the code change period. Most of my electricians would have suggested that if they saw the code change coming. A few bucks in material cost and you can upgrade to the more expansive receptacles later if you want.
QueticoBill wrote:I grew up in a house with those early versions of tamper proof receptacles, where the face of each outlet rotated to allow plug to be pushed in. I don't think that style was produced with a ground. For the life of me, I can't find a picture on line but I recall they were embossed with an arrow showing direction and that the holes were vertical when not in use. They also didn't work well when painted, as all of them were in my parents house.
Tom&Shelly wrote:Curiously, they say these have been required since 2008, but I don't recall buying them for the house we renovated in 2014-16.
the first picture of one of those receptacles...
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