Transformer Secondary Disconnect

[dose101]

In NEC do you need a disconnect switch for the secondary side of 480/120-208 transformer?

 

[charlie b]

Re: Transformer Secondary Disconnect

Not always. Look at NEC Table 450.3(B).

 

[don_resqcapt19]

Re: Transformer Secondary Disconnect

A disconenct is never required by code for the secondary of a transformer. The transformer secondary and/or the secondary conductors may require overcurrent protection.
Don

 

[pierre]

Re: Transformer Secondary Disconnect

Both Charlie and Don are correct ... it is semantics, a play on the language used.

If I can take a little liberty here, what I believe charlie meant is that based on table 450.3(B), you may have a disconnect on the secondary side of the transformer.

What Don meant is that the secondary of a transformer itself never has a disconnect.

If I stuck my nose where it didn't belong

Pierre

 

[don_resqcapt19]

Re: Transformer Secondary Disconnect

Pierre,
You are exactly correct. I didn't know what the real question in the original post was asking. Charlie answered based on overcurrent protection and I answered based on a disconnet switch.
don