Transformer

[hhsting]

I have low voltage transformer 120V to 12V for automatic toilet and urinals. Engineer says on plans its not separately derived but does not give xfmr model number or manufacturer


Questions:


1. Is their anywhere in NEC 2017 that says secondary has to have equipment grounding conductor extended?

2. Where would their be grounding and bonding for such transformer?


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[don_resqcapt19]

1) NO
2) Only on the primary

 

[augie47]

Without a model or manufacturer you are shooting in the dark but the ones I have seen are similar to doorbell transformers and either plug in or or mounted to a plate. (examples below)
don has answered your specific questions above.

 

[Tulsa Electrician]

May be dc as well. I had done a few a while back and they were 12 v dc.

What VA?