NEMA size

NEMA (National Electrical Manufacturers Association) contactors and motor starters are rated by sizes. These sizes are grouped by rated current and power.^[1]^[2]

NEMA size	Max. continuous amperes	Max. HP at 200 V, AC	Max. HP at 230 V, AC	Max. HP at 480/575 V, AC
00	9	1.5	1.5	2
0	18	3	3	5
1	27	7.5	7.5	10
2	45	10	15	25
3	90	25	35	50
4	135	40	50	100
5	270	75	100	200
6	540	150	200	400
7	810	-	300	600
8	1215	-	450	900
9	2250	-	800	1600

References