Wiring A Subpanel With 2 Wires . Grounds and neutrals were isolated to provide separate paths back to the panel. I *think* this was acceptable in the past. Need some guidance on subpanel wiring. Community Forums from www.doityourself.com 1) it is 10/2 uf cable ran through pvc conduit into the trench until the trench depth reaches 24 inches on both sides (shed and house) of the run. Mount the subpanel about a foot away from the main service panel. As long as we had the heavy equipment on site, i wanted to bring utilities to the yurt/rv site, too.