i am originally from the midwest and always called 4 squares 1900 boxes, but once i moved found out nobody knew what i was talking about out here in the westcoast so where did 1900 come from? catalog # or something?
just curious been years since i heard that term?
i know its not a code question but had to ask after reading it in a posting.
Back in the 70's I worked for a guy the called the boxes 1900 boxes and called the raised covers: * 19T = single toggle * 19TT = double toggle * 19D = single duplex * 19DD = double duplex * 19TD = toggle and duplex
Stuck in my head all these years. When I make a material list I always use these numbers. My shorthand. Can't order them that way. No one knows what you are talking about.