One side of 120 volt circuits is at ground potential, even in 1954. I guess I was fortunate to have started on the neutral side. Or possibly, with a wooden building, wasn't grounded and didn't cross anything. It occured in Falls Church, Virginia way back when that was in the deep boonies and the building probably had the old timey cloth bound romex and no ground wire.
As far as the muscle retraction goes, 240 volts DC "bites" a lot! harder than 240 VAC. After 50 years in the field, I'd much rather tangle with AC. Oh, and Tommy Edison was a good salesman, but no engineer.
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