secondary protection

[GSXR600]

I have a 7.5 KVA, 208 volt to 480 volt single phase transformer feeding 20, 250 watt fixtures will i need secondary protection if so can you piont to the code article.

Thanks,

 

[augie47]

Your primary articles will be 450.3 and 240.21(C). If you primary OCP is properly sized per 450.3 you may not need secondary protection as far as the transformer is concerned. If your primary and secondary are both two wire and your conductors are sized as mentioned in 240.21, you might not need secondary protection as far as the conductors are concerned.