Arno Wagner wrote:

In most residential areas, they will send one leg of that three
phase 3KV out to a distribution transformer near your house. The
secondary of that transformer has a center-tap tied to the neutral,
and then two hot wires that are 180' out of phase. So neutral to
one leg is 120V, but leg to leg is 240V.

That would be 210V leg-to leg, because of the phase shift.

No, it's 180' phase shift. The two legs are directly out of phase,
therefore they sum. It's not three-phase, it's what they call
single-phase (even though it's really two phases).
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."