Current Carrying Capacity

Nominal Diameter		Current Range (kA)
Inch	mm	UHP	SHP	HP	HD
8	200	–	–	5.5 – 9	5 – 6.9
10	250	9.2 – 15.1	9 – 14.5	8 – 13	7 – 10
12	300	13 – 22	13 – 20	13 – 17.4	10 – 13
14	350	20 – 30	19 – 28	17 – 24	13 – 18
16	400	25 – 40	24 – 36	21 – 32	18 – 23
18	450	32 – 45	29 – 42	25 – 40	22 – 27
20	500	38 – 55	32 – 52	30 – 48	25 – 30
22	550	48 – 62	42 – 59	37 – 57	32 – 40
24	600	52 – 72	46 – 69	44 – 67	38 – 47
28 AC	700	62 – 95	–	–	–

Important: This data is for guidance only. Maximum current ranges depend heavily on Power-On time, total Operating Power, and furnace regulation. Please consult your MBI representative for a complete evaluation.