Customer has a 230 volt single phase 5hp air compressor. It does not list 208 on the nameplate. They never check with us when they buy equipment to see what voltage they should get, just "save a lot of money" when they buy the cheapest one.
The service is 480/277 3 phase. There is a 208/120 volt panel next to it. The unit will sit 20 ft from the panel. I still think I need to install a 7.5 KVA buck-boost to get the 230 volts it calls for on the nameplate. The 208-230 volt motors I have seen many times must be 3 phase, right? Do I need the transformer?
[This message has been edited by poorboy (edited 09-29-2005).]
