EGCs missing ?

[Isaiah]

Client has a delta-delta ungrounded transformer (13.8kV to 480V, 2.0MVA), that feeds a 480V SWGR, 3P,3W, via bus duct to the XMFR secondary.
From the SWGR they feed 5, 480V MCCs,3P, 3W with parallel 500kCMIL conductors, BUT they do not show an EGC with any of the feeders…
As far as I know, you must have an EGC in each conduit for parallel feeders even if the upstream transformer is ungrounded. Am I missing something?


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[Dsg319]

Should still be a egc for ground fault indication

 

[infinity]

What type of conduit?

 

[Isaiah]

What type of conduit?

It appears to RGS - rigid galvanized steel


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[infinity]

It appears to RGS - rigid galvanized steel


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So there is an EGC, the metallic conduit.

 

[ptonsparky]

There should be some bonding bushings or locknuts involved.

 

[infinity]

There should be some bonding bushings or locknuts involved.

You might be right if there are concentric or eccentric KO's.