Code says take Highest over current device ( say on 50 hp. 65 amp Times Largest allowable fuse size 300% plus full load amps of other mts. ) to get feeder Overcurrent Device size. Example
50 Hp = 65 a,30 hp= 40a, 10 hp=14a 10hp.= 14a
65x300%=195+40+14+14=263a
250 A overcureent Device.Max (there are Exceptions I know)
But I'm wondering how many use the 300% max and how many use less say 150% to 175% x largest OC device???
65x150%=97.5+40+14+14=165.5 amps then round up to 200A.
H?????and if so have you had any problems??
YoopersUp
