Is a disconnect required to be installed next to a transfer switch (industrial, campus type setting) for the generator feeder. There is a generator remotely installed away from a Bldg. and the generator power enters a mechanical room. Normally, I've seen the gen. feeder go right to the transfer switch. I think it's good design, in case you want to isolate Generator power for a test, and or trouble shooting job. Is there anything in the code that requires such a disconnect? Thanks
445.18 Disconnecting Means Required for Generators. Generators shall be equipped with disconnect(s) by means of which the generator and all protective devices and control apparatus are able to be disconnected entirely from circuits supplied by the generator except where both of following conditions apply: (1) The driving means for the generator can be readily down. (2) The generator is not arranged to operate in parallel another generator or other source of voltage.