**Contents**show

## How many amps does a 2.5 hp motor draw?

Common Horsepower to Amps Conversions

Horsepower | Amps | Voltage |
---|---|---|

2 HP | 13.8 A | 120 V |

2.5 HP | 17.3 A |
120 V |

3 HP | 20.7 A | 120 V |

3.5 HP | 24.2 A | 120 V |

## 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 size breaker do I need for a 2 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 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?

Full-Load Current and Circuit Protection Data for Three-Phase AC Motors

Motor Horsepower | Breaker Size | |
---|---|---|

20 | 230 V 460 V | 100 50 |

25 | 230 V 460 V | 100 50 |

30 | 230 V 460 V | 125 70 |

40 | 230 V 460 V | 175 100 |

## How many amps is a 5 hp motor?

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 |

## How many HP is 9.5 amps?

Here are the typical Full Load Amps (FLA) for 220VAC and 120VAC 1 phase 60hz electric motors

Motor horsepower | RPM | Full Load Amps |
---|---|---|

3/4 | 3450 | 11.8 |

1725 | 11.6 | |

1075 | 9.5 | |

1 | 3450 | 13.0-15.0 |

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

1 HP is 746 watts x 1.5 HP = 1,119 watts. 1,119watts ÷ 120volts= **9.325 amps**.

## What size wire do I need for a 30 hp motor?

Electrical motor wiring data – NEMA amps, starter size, HMCP size for motors ranging 1/2 to 500 hp

Motor HP | NEMA amps | Phase Wires (AWG) |
---|---|---|

25 | 34 | 6 |

30 |
40 |
6 |

40 | 52 | 4 |

50 | 65 | 4 |

## What size breaker do I need for a 1.5 hp motor?

Okay, a 1.5 HP motor at 115 volts the Full Load Current (FLC) is 20 amps, (table 430.148 NEC) to figure out short circuit and ground fault protection you take 250% x FLC, so 250% x 20 (FLC) = **50 amps**, this is your circuit breaker size.

## What size breaker do I need for a 20-amp motor?

Use **12-gauge wire** for a 20-amp circuit, 10-gauge for 30 amps, 8-gauge for 40 amps, and 6-gauge for 50 amps.