Normaly a MCC doesn't need a neutral.
I like the idea of an undersized neutral that is used just for the control transformers. It can get overloaded though. I have seen many machines with lights, receptacles and other 120 volt devices connected to the control circuits.
Is the line side of the control circuit tapped in the bucket with it's own fuse in place of the transformer?
Not sure if it is a violation though.
