Hello, Im bidding a job for a print shop. They have an existing 225 amp single phase panel that pulls 190 amps when they have everything going. They want to hook up 180 amps worth of 3 phase printing equipment. I know how to do everything for the job EXCEPT how to meter the two panels. I called the supply house and asked for a 400 amp 3 phase meter base and they said all they make is a 320 amp meter base. They went on to say that I could hook up my 2 panels to this meter base but if the current goes over 320 amps then the meter will not record the watts properlly. So my question is do I need to use a current transformer? I think thats what they are called. Could someone who deals with these types of service installations please give me some help? Thanks.
