Transformer Disc.

[101010]

I am putting a transformer in a fire pump vault and it is feed from an outside panel, The engineer does not have a disconnect where the power comes in the vault on line side of the transformer. There should be means of disconnect in the vault right?

 

[jim dungar]

A general use transformer has never needed an in-sight disconnect.
Well at least not until the 2011 NEC

 

[Dan coulstring]

REF 2011 NEC

450 This article covers the installation of transformers dedicated
to supplying power to a fire pump installation as
modified by Article 695.

450.14 Disconnecting Means. Transformers, other than
Class 2 or Class 3 transformers, shall have a disconnecting
means located either in sight of the transformer or in
a remote location. Where located in a remote location,
the disconnecting means shall be lockable, and the location
shall be field marked on the transformer.

 

[augie47]

Is the fire pump vault a seperate building ?
If so, you might look at 225.32 to make sure the exception applies.