sub panel

Old 09-19-04, 04:51 AM
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sub panel

A few years back I installed a 60 amp subpanel in my garage. The garage is 75 feet from the house. The wiring runs underground in PVC conduit. I had my electrical work inspected and it passed with no problem. I have been doing some reading and now wondering if I should have installed a separate grounding rod at the subpanel? If so why didn't the inspector pick it up. Any ideas of this?
Old 09-19-04, 05:23 AM
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If an inspector didn't notice you had no ground rod at a detached structure he wasn't looking very well.
Yes, you should install one with #6cu to the panel. If you ran 3 feed conductors to the sub then you do NOT isolate the grounds and neutrals.
If you ran 4 conductors (hot,hot,neutral,ground) then you have to keep the grounds and neutral isolated in the sub. A separate ground bar in the panel may be necessary.

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