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Old 09-25-2013, 12:30 PM   #1
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Hi all,

New member here, posting for the first time! I’m planning to add a 60amp sub panel in my basement (hobby) woodworking shop. The run from the main panel is about 68’, plan to use #6awg red, black & white and a #10awg green ground in ” emt. So far so good? In the shop I’m planning 3 220v circuits with #10awg & 3 110v circuits with #12awg, all in emt. The question is about running ground wire in the branch circuits. From reading many posts it looks like green ground wire isn’t required in the shop branch circuits, but I’m considering doing so for added safety. What size ground should I use?

Thanks for any help & suggestions!

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Old 09-25-2013, 12:56 PM   #2
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technically, the emt can function as the equipment grounding conductor but this means every coupling, every box connection, etc. needs to be installed correctly so as to carry fault current. all it takes is one loose screw and the grounding becomes compromised. if it was me, i would pull a grounding conductor in each conduit run. you don't necessarily need one for each circuit, just each run (if each circuit has its own conduit run, then it is academic). for conduits with the #10 conductors, pull a #10 ground. for conduits with the #12, pull a #12.

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Old 09-25-2013, 12:59 PM   #3
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A single ground conductor is permitted in a a conduit with multiple circuits. The ground must be sized to the largest circuit in the conduit.
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Old 09-25-2013, 01:02 PM   #4
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Always run a ground wire. Especially for equipment. You many not need a Neutral wire for the 240V plugs, but a ground should be ran...as you said, for safety. So if anything faults to ground, there is a dedicated fault path for the current to take and ensure it goes to the ground rod, not into another circuit or through you. Use a full size ground on each circuit. For example, if you will be running 120v, 14ga wire for a single phase plug, use 14/3 wire.
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Old 09-25-2013, 01:13 PM   #5
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Thanks all for the quick replies, resolved that question! Got another question though, is it to code and prudent to run 2 #10 hots for 220v plus a #12 hot, #12 neutral for a 110v circuit and a #10 ground in a single 1/2" emt? Runs are 30' or less. I can use existing 1/2" emt & make life a little easier.
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Old 09-25-2013, 01:26 PM   #6
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Quote:
Originally Posted by dpakiz View Post
Thanks all for the quick replies, resolved that question! Got another question though, is it to code and prudent to run 2 #10 hots for 220v plus a #12 hot, #12 neutral for a 110v circuit and a #10 ground in a single 1/2" emt? Runs are 30' or less. I can use existing 1/2" emt & make life a little easier.
no conduit fill issue with the 1/2" emt
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Old 09-25-2013, 04:27 PM   #7
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Quote:
Originally Posted by statum1012 View Post
Always run a ground wire. Especially for equipment. You many not need a Neutral wire for the 240V plugs, but a ground should be ran...as you said, for safety. So if anything faults to ground, there is a dedicated fault path for the current to take and ensure it goes to the ground rod, not into another circuit or through you. Use a full size ground on each circuit. For example, if you will be running 120v, 14ga wire for a single phase plug, use 14/3 wire.
Oh so many misconceptions

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