I have a 60 amp subpanel in my garage and plan to add a second 30 amp subpanel to an out-building 130 ft away (fed from the 60 amp). I Plan to run 6 AWG 4-wire from the 60 amp to the 30 amp in 1 1/2 in PVC buried 18 in. My understanding is that I must keep the neutral & ground from the 30 amp separate from the 60 amp (e.g. the ground goes to a separate ground rod [or two] at the out-building and the neutral runs back to the main service entrance). If I understand this correctly, I have a problem in that I do not have a means of getting the neutral from the new 30 amp back to the main service entrance.
- Is my understanding regarding the ground & neutral correct?
- If so, are there other options (current needs a return to source so I doubt it)?