Table of Contents

- 1 How do you convert HP to amps?
- 2 What is the full load current of a 1 hp motor?
- 3 What size breaker do I need for a 40 hp motor?
- 4 How many amps does a 1 HP pool pump draw?
- 5 What causes a motor to draw too many amps?
- 6 How many amps does a 5hp motor draw?
- 7 How many amps is a 40 hp motor?
- 8 How many amps does a 1.5 HP pool pump use?
- 9 How many amps does a hp motor draw?
- 10 How to find the current draw of a motor?
- 11 How is current in amps equal to horsepower?

## How do you convert HP to amps?

The conversion from amps, a measure of electric current, to horsepower, a measure of power output by a motor, can be done using a fairly simple formula. Thus, horsepower is equal to the current in amps times the voltage in volts times the efficiency times the power factor, divided by 746.

## What is the full load current of a 1 hp motor?

Full Load Current: Three Phase AC Motors

Motor Horsepower | Motor Ampere | |
---|---|---|

1 | 230V 460 V | 4.2 2.1 |

1-1/2 | 230V 460V | 6.0 3.0 |

2 | 230V 460V | 6.8 3.4 |

3 | 230V 460V | 9.6 4.8 |

**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.

### What size breaker do I need for a 40 hp motor?

How to Calculate How What Size Circuit Breaker a Machine will Need:

HorsePower of Main Motor | 220 Volts, 1 phase | 440 Volts, 3 phase |
---|---|---|

25 | 140 | 35 |

30 | 168 | 42 |

40 | 224 | 56 |

50 | 280 | 70 |

### How many amps does a 1 HP pool pump draw?

12 Amps

Since it’s an aboveground pool pump it’s an uprated model and draws in the vicinity of 10 to 12 Amps at 120 volts. It might draw less depending on your plumbing.

**How many amps is 3 HorsePower?**

Common Horsepower to Amps Conversions

Horsepower | Amps | Efficiency |
---|---|---|

3 HP | 20.7 A | 90% |

3.5 HP | 24.2 A | 90% |

4 HP | 27.6 A | 90% |

4.5 HP | 31.1 A | 90% |

#### What causes a motor to draw too many amps?

Electrical overload or over-current is caused by an excessive current flow within the motor windings, exceeding the design current which the motor is able to carry efficiently and safely. This can be caused by a low supply voltage, resulting in the motor drawing in more current in an attempt to maintain its torque.

#### How many amps does a 5hp motor draw?

AMP DRAW BASED ON HORSEPOWER

HP | 1 Phase Amps | 3 Phase Amps |
---|---|---|

115 volt | 208 volt | |

5 | 56 | 16.7 |

7-1/2 | 80 | 24.2 |

10 | 100 | 30.8 |

**What size breaker do I need for a 1 hp motor?**

How to Calculate How What Size Circuit Breaker a Machine will Need:

HorsePower of Main Motor | 220 Volts, 1 phase | 220 Volts, 3 phase |
---|---|---|

1 Hp | 5.6 Amps | 2.8 |

2 | 11.2 | 5.6 |

3 | 16.8 | 8.4 |

4 | 22.4 | 11.2 |

## How many amps is a 40 hp motor?

AC Motor Full Load Amperes

HP | 200 Volts | 220-240 Volts |
---|---|---|

40 | 120 | 104 |

50 | 150 | 130 |

60 | 177 | 154 |

75 | 221 | 192 |

## How many amps does a 1.5 HP pool pump use?

The 1.5HP pump is drawing 17 Amps on initial start up for about 2 seconds (literally), and then drops to 12 Amps and hums away. Thank you to everyone for your help.

**How many amps does a pool pump require?**

A typical above ground pool pump will require a 20-amp breaker and use #12 gauge wire to deliver the electricity.

### How many amps does a hp motor draw?

Amps = (Horsepower × 746) ÷ Efficiency ÷ Volts. Watts = Horsepower × 746. Watts = Watts ÷ Efficiency. Amps = Watts ÷ Volts.

### How to find the current draw of a motor?

Amps = HP × 746 V × η × PF Thus, the current in amps is equal to horsepower times 746 divided by the voltage times the efficiency η times the power factor. For example, let’s find the current draw in amps of a 1 horsepower motor that runs at 120 volts with a 90% efficiency. Amps = 1 HP × 746 W 120 V ×.9

**What should the load be on a 1 horsepower motor?**

For a 1 horsepower (hp) motor the load should typically be in the range 1/2 to 1 hp with maximum efficiency at 3/4 hp. A motor with a service factor can occasional be overloaded.

#### How is current in amps equal to horsepower?

Thus, the current in amps is equal to horsepower times 746 divided by the voltage times the efficiency η times the power factor. For example, let’s find the current draw in amps of a 1 horsepower motor that runs at 120 volts with a 90% efficiency.