That is your 240/120 service and it could
come from a transformer, be synthesized from a battery, or just exist on
a piece of paper.

Oh my.

So there is another point of semantic confusion in this discussion.

120/240 can mean 120 Volts and 240 Volts can refer to the two voltages in a usual home system.

0/120/240 can also refer to 0 degrees , 120 degrees , 240 degrees, the three phase angles in the usual 3 phase system.


mark