Dry Type Tranformer Disconnecting Means

[ramdiesel3500]

Good morning folks!
I have been asked to determine the requirements for disconnecting means on remotely located dry-type transformers. All are 480V delta primary-120/208V Wye secondary units. In each case, the disconnecting means and overcurrent protection (one circuit breaker for both functions) for the 480V power feed is in a panel that is not within sight of the transformer. The load being fed from the transformer is a panelboard that is also 'not within sight' of the transformer.

Can anyone out there point me to the correct code sections(s) to help me determine where I need to place a disconnect switch(s) and overcurrent protection? My gut tells me that a non-fused disconnect is required required for the supply conductors (480V) within sight of the transformer. My gut also tells me I need a fused disconnect within 10 feet of the transformer to protect the secondary conductors and this disconnect would need to be bondable (say service entrance rated??) unless I bond inside the transformer.

Any code sections references or guidance will be greatly apprecaited by this confused, tired, overloaded engineer!!!
Thanks in advance!!

 

[ryan_618]

There are no requirements for a disconnect within sight of a transformer.

 

[ramdiesel3500]

Thanks Ryan
Your response prompted me to re-think my question. My question actually has to do with protection of the primary and secondary conductors as well as the transformer itself. After some frantic digging, I found 240.21(C) and now I have my answer.
Thank-you for your quick response. It set me on the right path!