Does anyone else have problems when they hear people call 120/240 1p "split phase" or even "2 phase"?
Yikes it sets my teeth on edge.
The problem is even Wikipedia and a few panel manufacturers use the term split phase in their documentation. Split phase is one way to wire a motor and there is only one phase in your household panel with 2 ungrounded conductors derived from one 240v secondary that just happens to have a grounded center tap. It is simply single phase, nothing else.
I know it was not on any streetcars, it was n a house of worship in Center City. A sub-basement, way down below grade, and that made it scarier. Heck, if there was any issue, noone would have found us.