Related Resources: motors
Small Induction Motors Horsepower and Speed Ratings NEMA
Electric Motors Design and Engineering
Typical NEMA horsepower and speed ratings for small induction motors rated at 115, 200, and 230 volts single phase and 115, 200, and 230 volts polyphase induction motors
Small Induction Motors, Horsepower and Speed Ratings
HP |
All Motors Except Shaded Pole and Permanent-Split Capacitor |
Permanent Split Capacitor Motors |
All Motors Except Shaded Pole and Permanent Split Capacitor |
Permanent Split Capacitor |
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60-Hertz Synchronous Rpm |
Approximate RPM at Rated Load |
50-Hertz Synchronous Rpm |
Approximate RPM at Rated Load |
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1, 1.5, 2, 3, 5, 7.5, 10, 15, 25, and 35 millhorsepower |
3600 1800 1200 900 |
3450 1725 1140 ... |
... ... ... ... |
3000 1500 1000 ... |
2850 1425 950 ... |
... ... ... ... |
1/20, 1/12, and 1/8 horsepower |
3600 1800 1200 900 |
3450 1725 1140 850 |
... ... ... ... |
3000 1500 1000 ... |
2850 1425 950 ... |
... ... ... ... |
1/6, 1/4, and 1/3 horsepower |
3600 1800 1200 900 |
3450 1725 1140 ...850 |
... ... ... ... |
3000 1500 1000 ... |
2850 1425 950 ... |
... ... ... ... |
1/2 horsepower |
3600 1800 1200 |
3450 1725 1140 |
3250 1625 1075 |
3000 1500 1000 |
2850 1425 950 |
2700 1350 900 |
3/4 horsepower |
3600 1800 |
3450 1725 |
3250 1625 |
3000 1500 |
2850 1425. |
2700 1350 |
1 horse power |
3600 |
3450 |
3250 |
3000 |
2850 |
2700 |