As costly as the phase converter will be, it would most likely be cheaper than replacing the motors and controls on an existing machine. The new service will be close to the same either way you go.
I would suggest a 25% growth factor for this customer in figuring the new service.
As his business grows he wii be adding equipment. Depending on his plans, you might ask him to consider a step-up transformer. I believe a 120/240v 1 phase to 480/277 3 phase is available. Might even be less expensive overall.
Good luck.
[This message has been edited by nesparky (edited 10-12-2002).]
