A plan reviewer is asking me to consider two DC motors contribution (50 and 75 HP, 500 V) in my Fault Current Calculation of a 480/277 V, 3 phases system where they are connected through two rectifiers. Does somebody know about to do that?
Thanks.
I am an engineer in Florida.
NEC, Art. 430.26 direct you to IEEE Std. 141 and IEEE std. 241 to obtain another demand factors to affect classical load calculation.
I read these books and they say about a diversity factor as another factor to apply due to individual non-coincident maximum demand...