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Electrical Motors - Horsepower and Amps

Horsepower rating of electrical motors compared to their ampere rating

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electric motor horsepower amps

Horsepower rating compared to electric motor ampere rating - 115 VAC and 230 VAC - are indicated below:

Ampere Rating (amps)
Power Rating
(hp)
115 VAC230 VAC
Efficiency (%)
50705070
1/4 3.2 2.3 1.6 1.2
1/3 4.3 3.1 2.2 1.5
1/2 6.5 4.6 3.2 2.3
3/4 9.7 7.0 4.9 3.5
1 13.0 9.3 6.5 4.6
1 1/2 19.5 13.9 9.7 7.0
2 25.9 18.5 13.0 9.3
5 64.9 46.3 32.4 23.2
  • 1 hp = 745.7 W
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