inspectorwill Posted November 14, 2009 Report Share Posted November 14, 2009 Inspected a home with detached, all steel (frame and siding) constructed shop about 75' from main house and main panel. All outlets are equipped with two conductor wiring (hot and neutral) and run through metal conduit back to the subpanel. The subpanel is connected via metal conduit (as far as I can tell because it is buried) back to the main panel. The neutral terminal in the subpanel is isolated from the panel and there is a bare, stranded copper wire connected to the neutral terminal and run to a ground rod at the exterior of the shop. The grounding conductor is doubled up with the neutral under a single lug. Seems to me the bare copper grounding conductor connected to the neutral creates a potential path for stray current since it is not isolated from the conduit through which it runs. Not really sure why or if the separate ground rod is necessary. See photos attached. Thanks for any feedback. Click to Enlarge 61.1 KB Click to Enlarge 62.53 KB Click to Enlarge 54.77 KB Quote Link to comment Share on other sites More sharing options...
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