grounding in high rise

[tholloway]

New to forum..main service enters building..sub panels and xfmrs on other floors..in electric rooms there will be a ground bar..tied to ground ring..bldg. steel..other ground bars...my question is ..can I ground my xfmrs to the ground bar or do I have to supplement it somehow..I.e. the ground bar and bldg. steel?

 

[infinity]

If the building has building steel frame construction you would use the steel in the vicinity of each transformer as the grounding electrode.

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