I"d leave the house as it is and pull out the long runs for use in
the shop once done.

I have single phase myself and added three phase rotary. I could have
the power line deliver me 3 phase - as I have 1500 feet 42KV 2 phase
and the house and shop tap off only one of the two legs. I'm a side
branch from the state highway - delivering power to my site - once a
sawmill. Mill is long gone, but the power allows all sort of possible
future expansions or changes.

Martin

On 10/25/2010 2:58 PM, Karl Townsend wrote:
"The Kid" is putting in underground wiring to his outbuildings. For
now, power will come from the house to the shop.

The shop sits twenty feet from a three phase line. future plans is to
install a three phase service to the shop, cut the ordinal transformer
out, and then feed one phase back to the house from the wiring being
installed now.

OK, a one phase house service has two 110 legs on the same phase
opposite polarity to get 220 across the two hot wires, neutral is the
center tap. As I understand it you in effect get three 110 hot wires
120 degrees apart in the phasing for three phase with the center tap
for neutral.

So, can you run single phase 220 off this? Need any special provisions
installed now? He's putting in conduit - four wires - two hot, neutral
and ground.

Karl