watersparkfalls:
..so where did 1900 come from? catalog # or something?
just curious been years since i heard that term?
Tiger:
My understanding is that the box is 19.00 cubic inches.
I used to think that they were 19 cu.in., but looking at
Table 314.16(A) Metal Boxes you soon discover that NO box is 19 cu.in.
Maybe it was a model # ?
PS: on the East Coast, we still call a 4" box 1900 boxe....and 4 11/16" are called 5" boxes