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
60-Hertz
Synchronous
Rpm
Approximate
RPM at
Rated Load
50-Hertz
Synchronous
Rpm
Approximate
RPM at
Rated Load
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

 

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