How many amps, the breaker? For 20 amps, use 12 ga, for 30
amps, use 10 ga.

I've seen 2 conductor (with ground) wire used. I've also
seen 3 conductor used, so there is a neutral as well as a
ground.

Yes, the two poles of the 220 volt are out of time with each
other. Oddly, they call that single phase 220.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Aaron Fude" wrote in message
...
Hi,

I have a wire that seems to have only to conductors in it.
It's a gray
wire in which the plastic sheath is tight over the wire. The
two wires
are about 1/4" apart. I'm not sure how to better describe
it.

It seems to be connected to a double breaker and carrying
240V to the
A/C unit. Does that make sense? I guess if the two wires are
120V
out-of-phase then the AC current can just flow from one of
the wires to
the other?

I'm trying to make sense of this for my own education, but
also
wondering what kind of wire I would need (12/2?) to replace
this one
(it's routed stupidly).

Thanks,

Aaron