I inherited a machine which has five motor starters all bussed togethere across the top of the OL unit. Originally the five motors were .75, 1.5, 2, 2, and 3 horsepower and the fuse feeding all five starters was specified to be 30 amps. I have replaced the 3 hp motor with a 10 hp including the proper OL unit and contactor. I am unsure of how to properly size the fuse now. Do I size the fuses by figuring the total horsepower? If that's the case, 30 amps seems appropriate given the total hp before I made the changes.
Voltage is 480 FWIW.
Thanks in advance.
Voltage is 480 FWIW.
Thanks in advance.