Conduit used as ground

37609 Views 8 Replies 8 Participants Last post by Gregdrose, Nov 24, 2013

scottieboy469

Discussion Starter · Oct 25, 2013

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.

Thanks

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RIVETER

· #5 · Oct 31, 2013

scottieboy469 said:
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.

Thanks

It is pretty important that when we are talking about "ground" that we understand what GROUND is... EARTH, and the solid connection to it for the purpose of dissipating weird voltages has nothing to do with the circuit operation. Bonding TO ground is important...as well,

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