**Contents**show

## How many amps does a 3/4 hp motor draw at 120 volts?

AC Motor Full Load Amperes

HP | 110-120 Volts | |
---|---|---|

3/4 | 13.8 |
6.9 |

1 |
16 |
8 |

1.5 | 20 | 10 |

2 | 24 | 12 |

## How do you convert HP to amps?

**How to Convert Horsepower to Amps**

- Amps = (Horsepower × 746) ÷ Efficiency ÷ Volts.
- Watts = Horsepower × 746.
- Watts = Wattsη
- Amps = Watts ÷ Volts.
- Amps = HP × 746V × η × PF.

## How do you calculate amp draw on a motor?

You can usually find this information listed on the product label, or in the owner’s manual. Then **you take the wattage, and divide it by the voltage** (100 watts / 12 volts = 8.33 amps.) This will tell you roughly the amperage your equipment will draw.

## How many amps does a 3/4 hp motor draw?

AMP DRAW BASED ON HORSEPOWER

HP | 1 Phase Amps | |
---|---|---|

115 volt | 230 volt | |

1/2 | 9.8 | 4.9 |

3/4 | 13.8 |
6.9 |

1 | 16 | 8 |

## What size breaker do I need for a 3 HP motor?

What size breaker do I need for a 3 HP motor? **A 20 amp breaker** is all you’d ever need for a 220v 3HP motor. It wouldn’t hurt anything to run 30amp circuits if you so choose, but it’s overkill.

## How many amps does a 2.2 kW motor draw?

Single Phase Motors

MOTOR RATING | HP | APPROX. F.L.C. AT LINE VOLTAGE |
---|---|---|

0.75 kW | 1 | 15 |

1.1 kW | 1.5 | 21 |

1.5 kW | 2 | 26 |

2.2 kW | 3 |
37 |

## How do you calculate amps in a 3 phase circuit?

Divide the power consumption in watts by the line voltage multiplied by the power factor to find the amperage. For three phase circuits the power factor is **the square root of 3**. If your calculator doesn’t have a square root function, use 1.73 as an approximation of the square root of 3.

## How many amps does a 2 HP well pump draw?

When delivering 1/2hp to the pump, it draws **5.0 Amps**. If that motor operates at its service factor of 0.8, it will draw 6.0 Amps. Most installations have motors near the maximum load.