detached garage subpanel help
You need a ground rod at the subpanel and should also have a ground wire running back to the main panel. The ground wire going back to the house is also mandatory if there are any other metallic connections such as cable TV wires or plumbing going to the house. (Grounding the subpanel to a metal water pipe going into the ground can be substituted for the ground rod.)
Only one feed is allowed out to any one separate building so with your 70 amp subpanel you might as well run #6 wires for 60 amps @ 240 volts.
Neutrals and grounds are kept separate all the way except for the connection in the main panel.
The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.
Last edited by AllanJ; 03-17-2009 at 06:05 PM.