NEMA size explained

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

See also

• Contactor
• Motor starter

Notes and References

1. Web site: NEMA ICS 2.4. dead. https://web.archive.org/web/20170405183145/https://www.nema.org/standards/pages/nema-and-iec-devices-for-motor-service-a-guide-for-understanding-the-differences.aspx. 2017-04-05.
2. Web site: Definition: NEMA Motor Starters.