Scott, thanks for the info. It helps me out greatly. I also contacted the manufacturer and am waiting for their input.
This is going to be a pretty major job if I get it. Just working on an estimate now. They are replacing a small walk in cooler with a much bigger cooler and freezer unit. It is requiring several units on top of roof area. Some are 3 phase and some single phase, 240 volts and one is 115 volts. A lot of circuits involved. Thanks again