Interesting concept. 2 'hots' & 1 neutral. I wonder why this didn't catch on big??

fires

These don't look very T/R either. That whole rail is just begging to be probed with a nail file.

reminds me of a time when I plugged in a hand drill and it smoked on me. the receptacle was wired for 240 V not sure why, it was in a kitchen beside the kitchen table.

Does anyone remember ITE Electrostrip? Not the same as the product above, but quite similar, older product was L & N, later product was L,N,& G.