10:17AM | 09/11/08
Member Since: 08/13/08
8 lifetime posts
a solid, bare #6 as an equipment ground. Went far easy than expected in the conduit across the back yard. The final 3" however...I lost some religion. I am now on the correct side of code.


03:56PM | 09/12/13
Hi to all. Lets see if I got this straight, I built a detached metal garage, for power I ran 4 #4 wires from the main panel to the subpanel, 2 hot, 1 neutral, 1 ground. Can I or should I connect the ground rods at my garage to the subpanel. The subpanel ground and neutral are isolated from each other. I come from the DC world, connecting both would be a ring, I dont think that is a problem with AC.


12:32PM | 10/23/13
Member Since: 10/23/13
1 lifetime posts

I think you've pretty much answered this already but I'd like to be certain: I've run 6/3 wire from my main panel (200 Amp) to a detached workshop (underground through PVC--18" deep). The 100 Amp subpanel does not appear to have a grounding bus. At current (no pun) I only plan on only running a drill and a rotary hand saw--neither at the same time. (I installed the 6/3 just in the off chance my needs might change and didn't want to go to the trouble of digging the trench up.)So--is it safe to wire my grounds together (the one attached to the ground/neutral at the main box and the one attached to the 12/2 wiring within the workshop)and pig tail them to a ground wire screwed to the metal panel box? In the near future I plan on getting a ground buss for the subpanel box and attaching the two grounds to it in addition to a #6 copper ground from the buss to an underground rod outside (which is there principally to protect from voltage spikes?)

Lastly--am I understanding your previous comment in this thread correctly concerning the code prior to 2005: that it was permissible to connect the ground and neutral on the neutral buss in the subpanel?? It's not presently allowed because the ground (since it would be common with the neutral) would experience the same voltage drop as the neutral--current would run through it. If so, why was it ever allowed in the first place?



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