I have a lot of temp power transformers setup on a job...they are fed by a 480V then steps down to 120/208...

The XO is bonded to the case then a #6 should be connected to a ground rod or grid correct? Even if temporary correct?

Please see photo..if possible point me to the NEC article.

Thank you again.

Greg

Attached Images
unngrounded_xfmr.jpg

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