Xfmr Grounding

[egurdian3]

Small renovation job, installing a Xmfr but the source panel (480/277V, 3Ph, 4w) seems to be using the RGSC as the grounding means; the EGCs are all disconnected, "waiting to be connected. No grounding bar.
The Question: Can we install a grounding bushing w/ locknut to establish the grounding bar, connect the Xfmr and all the EGCs? See picture.

 

[LarryFine]

I would bolt one or two grounding buses to the enclosure.

 

[egurdian3]

I would bolt one or two grounding buses to the enclosure.

Well the question is, by installing a grounding bushing and locknut, are we satisfying the grounding requirements for the source panel? If that is Kosher, then yeah, I would dedicate the Xfmr EGC to 1 bar.

 

[infinity]

Well the question is, by installing a grounding bushing and locknut, are we satisfying the grounding requirements for the source panel? If that is Kosher, then yeah, I would dedicate the Xfmr EGC to 1 bar.

So you want to attach the EGC feeding the transformer primary to a bonding bushing?

 

[egurdian3]

So you want to attach the EGC feeding the transformer primary to a bonding bushing?

Elctrically speaking ye; as long as the RGSC is used as the grounding means for the source panel.