transfrmer grounding

[MBLES]

i need to install a 50kva transformer on seventh floor parking garage. i dont have any building steel available. the transformer is feed from first
floor. could i run GEC in same conduit as feeder to ground rod on first floor? any ideas welcome.

 

[petersonra]

i need to install a 50kva transformer on seventh floor parking garage. i dont have any building steel available. the transformer is feed from first
floor. could i run GEC in same conduit as feeder to ground rod on first floor? any ideas welcome.

I think you would have to bond it to the conduit at both ends if it is ferrous, but I don't recall any requirement that precludes putting a GEC in a conduit with other conductors.

Incidentally, the code requirement is not to bond it to building steel but to the closest available grounding electrode.

 

[ADub]

Is the transformer fed from the service equipment?


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[MBLES]

Is the transformer fed from the service equipment?


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yes its fed from MDP.

 

[ADub]

yes its fed from MDP.

Look at 250.30(5) exception 2


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