He only needs #10 for the ground conductor for either #8 or #6. I'm not sure
if it's "still" legal to not run a ground with the circuit conductors, but
if he does that, nothing conductive can go between the buildings, including
catv, telephone, metal water line, etc.



"zxcvbob" wrote in message
...
dpb wrote:

As others have noted, I'll reiterate the more significant problems
here -- first, for underground even in conduit you need wet-location-
rated conductor and what you've described isn't -- you need an UF and
could dispense w/ the conduit except for protecting it going
underground. 3/4" conduit as you noted later isn't really large
enough.

I strongly recommend going to #10 for the feed and installing a small
subpanel. It will be far better in the end to spend a few extra bucks
up front. But, in particularl, the interior romex is _NOT_SUITABLE_
for the application.



You could stuff four #8 THWN-2 wires in there pretty easily, and #8 is
easy to work with. That would give you a 40A service with a separate
ground. Or run 2 black sixes and a white #8 for a 50A (60A? I don't
remember) service and establish a new ground at the garage. Either of
these would be legal with 3/4" conduit.

Bob