Transformer Grounding and Bonding

[strawburner]

I have a 25KVA single phase 480 volt to 120/240 step down transformer. The transformer is fed with 3 wire from utility. Do I ground XO on secondary to transformer case together with primary grounded conductor. See attached transformer nameplate.

 

[augie47]

Short answer "Yes"

 

[augie47]

 

[LarryFine]

Do I ground XO on secondary to transformer case together with primary grounded conductor.

Not groundED conductor, groundING conductor, IF it's large enough for both purposes.

 

[augie47]

Not groundED conductor, groundING conductor, IF it's large enough for both purposes.

Important distinction., good catch, Thanks ! (I "preach" the distinction in classes but missed it here)

 

[strawburner]

Thanks for the replies!

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