Equipment grounding conductor installed with service conductors

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finhead

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A three phase 4-wire service consists of three 600 kcmil conductors per phase and installed in three PVC conduits. The local inspector is insisting on a 3/0 equipment grounding conductor in each conduit.

While most of us would agree that the EGC is not required, and that it violates 310.4(B) because it would be paralleled with the neutral, does anyone know of any specific language that could be used to convince the inspector the the EGC is not required in a service raceway?

Using 310.4(B) is shakey because he may require a 600 kcmil EGC to avoid the violation.

Thanks,
Brian Dolan
 
It's difficult to beat that logic :)
You might look at 250.24 especially (C).. That might help
 
I would ask the inspector to give you the code reference that requires an EGC for bonding on the line side of the service. I would also point out 250.92.

Chris
 
Its sad when we see this misapplication of the rules.
Tell the inspector on the line side of the service its a white wire with an imaginary green stripe.
 
What does the serving electric utility say? The grounding conductor has to land somewhere. We strictly prohibit a customer's grounding from being connected to our facilities even to the point of prohibiting metallic conduit from entering our pad mounted equipment. :)
 
finhead said:
A three phase 4-wire service consists of three 600 kcmil conductors per phase and installed in three PVC conduits. The local inspector is insisting on a 3/0 equipment grounding conductor in each conduit.

While most of us would agree that the EGC is not required, and that it violates 310.4(B) because it would be paralleled with the neutral, does anyone know of any specific language that could be used to convince the inspector the the EGC is not required in a service raceway?

Using 310.4(B) is shakey because he may require a 600 kcmil EGC to avoid the violation.

Thanks,
Brian Dolan
Click to expand...

This seems like it must be a misunderstanding...

Also the statement "he may require a 600 kcmil EGC to avoid the violation."... Even if he decides to make you pull an EGC (for some reason) the requirement for parallel conductor to be the same size is apples to apples and oranges to oranges. EVERY wire doesn't have to be the same size just the paralleled ones right? Paralled phases must be the same, and paralleled neutrals have to be the same but not the same as each other...

Does that make sense?
 
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