Disconnect needed?

[Machiavelli999]

The situation is a 112.5KVA transformer being fed from a panelboard far away and out of sight of the transformer. On the secondary is a panelboard with a main breaker. Does the main breaker act as the disconnect for the entire installation or do I need a disconnect for the primary feeder?

 

[iceworm]

I'm not understanding the question.

You said you have a transformer feeder disconnect:

The situation is a 112.5KVA transformer being fed from a panelboard far away and out of sight of the transformer. ...

A panel with a main CB on the xfm secondary doesn't have anything to do with disconnecting the transformer - but I'm thinking you already knew that. Which leads me to beleive - I don't understand the question.

Are you asking if you need a transformer disconnect in-sight-of the transformer?

If you are under NEC 2011, 450.14 governs transformer disconnecting means.

the worm

 

[infinity]

What code cycle are you on? For for the 2008 and earlier you did not need a disconnect within sight of a transformer for the primary. The 2011 requires one, or a not within sight disconnect that is lockable and a transformer with some documentation as to where the disco is located.