MCC bus sizing Help
MCC bus sizing Help
(OP)
I have a total of 654hp motor list, largest motor 150hp. The 150hp (on a starter contactor) runs a meat grinder which will only operate continuosly for no more than 10min at a time. My estimate gives me an 800amp bus. Will this size do the trick? how do you properly calculate the proper bus size for such load?
Thanks
Sam
Thanks
Sam






RE: MCC bus sizing Help
430.24 Several Motors or a Motor(s) and Other Load(s).
Conductors supplying several motors, or a motor(s) and other
load(s), shall have an ampacity not less than the sum of each
of the following:
(1) 125 percent of the full-load current rating of the highest
rated motor, as determined by 430.6(A)
(2) Sum of the full-load current ratings of all the other
motors in the group, as determined by 430.6(A)
(3) 100 percent of the noncontinuous non-motor load
(4) 125 percent of the continuous non-motor load
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RE: MCC bus sizing Help
Bill
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RE: MCC bus sizing Help