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I had a rather strange discussion with our electrical inspector today. We were planning on using the conduit as our grounding conductor. I would rather pull ground wire but we are trying to eliminate extra cost. He told me that we can use the conduit as a ground but where it enters any concentric knockout that has a bigger size available we could not use it as a ground. we would need to install a bonding bushing or install a ground wire. i knew this rule applied for service conduits but i was not awear it applied for branch circuits of 110v. Any input would be greatly appreciated.

Typically it is good practice to install a ground wire but do you see any code violation here we are on the 2011 nec

Thanks
 

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I had a rather strange discussion with our electrical inspector today. We were planning on using the conduit as our grounding conductor. I would rather pull ground wire but we are trying to eliminate extra cost. He told me that we can use the conduit as a ground but where it enters any concentric knockout that has a bigger size available we could not use it as a ground. we would need to install a bonding bushing or install a ground wire. i knew this rule applied for service conduits but i was not awear it applied for branch circuits of 110v. Any input would be greatly appreciated.

Typically it is good practice to install a ground wire but do you see any code violation here we are on the 2011 nec

Thanks
No.

You need to ask your inspector where the violation is in the NEC.
 
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