Best route for Service upgrade

[jonbritt]

I have a small industrial building with 2 seperate spaces both with 208/120Y 200 amp services. The same company bought both partitions and knocked down the middle wall. They run CNC machinery and have built up to being fully loaded out for the service they have. Now they purchased a machine that has a rated capacity of 75kva. Thats 194 amps at the voltage they have. Their place is physically at its size limit for how many machines can fit in the building. So the question is, whats the best route. Utility said they wont provide a third service to the building , so another 200 amp panel wont work. Would a 400 amp 480 and 2 step down transformers for the current 208 panels be the best/ cheapest, or maybe replace the 2 - 200 amp meter socket with a 600 amp transocket, and feed 3 - 200 amp panels from that. Any ideas?

 

[kwired]

If the existing service disconnecting means are not at same location you already have code violations involving number of services to the building.

I think only option is to increase service capacity at a single location and subfeed anything existing that is to otherwise remain in place.

I doubt a 480 volt service is worthwhile if there is little or no room for expansion and you already are supplying everything from 208 volts. Plus you need additional space for transformers, panels, switches, etc.