On Sat, 17 Nov 2007 23:21:28 -0600, "Greg O"


Actually, you typically have 2 phase power into residence. 120 V on
two legs of a 3 phase system.

Single phase, center tapped.


If the shop is 'residential' there will likely only be 2 phase power
and you can confirm this my looking at how many wires enter the mast
just before the meter on the building. 3 wires is 2 phase (2
power-one common)


Single phase power. Two hot legs from a transformer and a center tap which
you tie to ground in your panel.

--

-Mike-