**Contents**show

## How many amps does a 3 HP motor have?

Common Horsepower to Amps Conversions

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

3 HP | 20.7 A |
120 V |

3.5 HP | 24.2 A | 120 V |

4 HP | 27.6 A | 120 V |

4.5 HP | 31.1 A | 120 V |

## 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 3 HP 480 volt motor draw?

AC Motor Full Load Amperes

HP | 200 Volts | 440-480 Volts |
---|---|---|

2 | 7.8 | 3.4 |

3 | 11 | 4.8 |

5 | 17.5 | 7.6 |

7.5 | 25.3 | 11 |

## How many amps is a 3/4 HP motor?

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 200 hp motor?

What size breaker do I need for a 200 hp motor? So, assuming an inverse time breaker, the 200 hp motor would have a maximum branch circuit OCPD of **240 amps x 250% = 600 amp**.

## Can I use 12 gauge wire on a 30 amp breaker?

“Twelve-gauge wire is good for 20 amps, **10-gauge wire** is good for 30 amps, 8-gauge is good for 40 amps, and 6-gauge is good for 55 amps,” and “The circuit breaker or fuse is always sized to protect the conductor [wire].”

## 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 |

## What size breaker do I need for a 21 amp 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 |
---|---|---|

10 | 56 | 14 |

15 | 84 | 21 |

20 | 112 | 28 |

25 | 140 | 35 |

## How much current is needed for a 5hp motor?

Full-Load Current in Amperes Single-Phase Alternating Current Motors

HP | 115V | 230V |
---|---|---|

5 |
56 |
28 |

7-^{1}/2 |
80 | 40 |

10 | 100 | 50 |

The voltages listed are rated motor voltages. The listed currents are for system voltage ranges of 110 to 120 and 220 to 240. |