Full Load Efficiency Range for Electric Motors

Horsepower	NEMA Design B Standard, 3-phase Induction Motor	3-phase 4-pole Energy Efficient Motor
1	68-78	80-84
1.5	68-80	81-84
2	72-81	81-84
3	74-83	83-88.5
5	78-85	85-88.5
7.5	80-87	86-90.5
10	81-88	87.5-90.5
15	83-89	89.5-91.5
20	84-89	90-93
25	85-90	91-93
30	86-90.5	91-93
40	87-91.5	91.5-93
50	88-92	91.5-94
60	88.5-92	91-94
75	89.5-92.5	92-95
100	90-93	93-95
125	90.5-93	93-95
150	91-93.5	93-96
200	91.5-94	94-95
250	91.5-94.5