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.
