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??

Thanks for any help,

Walt Conner