In article JMhvf.6482$Yc2.4004@trnddc04, "WConner" wrote:
A son has a garage that is about 25 ft. from his house. Previous owner ran a
direct burial 2-12 w/ground wire to it. It is a 20a 110v circuit. I am
wondering about changing it to 220v by using the ground wire as the neutral,
white wire to one side of the breaker box, black wire to other then putting
down a new ground rod out from the garage and running a new ground wire from
it for ground in the garage making 220v and 110v available so he can do some
modest shop work??

Multiple violations of the National Electrical Code here. Code does not permit
the use of an uninsulated neutral. The separate ground wire doesn't meet Code
either, as it fails the requirement that all conductors on a given circuit
must be in the same cable or conduit. Do it right: run a new, proper 220V
circuit using 10-3 WG direct-burial cable.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.