## How many amps does a 75 hp motor draw?

AC Motor Full Load Amperes

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

60 | 177 | 77 |

75 | 221 | 96 |

100 | 285 | 124 |

125 | 359 | 156 |

## What size breaker do I need for a 75 hp motor?

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

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

75 | 230 V 460 V | 300 200 |

100 | 230 V 460 V | 400 200 |

125 | 230 V 460 V | 500 250 |

150 | 230 V 460 V | 600 300 |

**How many amps does a 100 HP 3 phase motor draw?**

Here are the Full Load Amp (FLA) values for typical 230VAC and 480VAC 3 phase motors.

Motor horsepower | Full load amps 230VAC | Full load amps 460VAC |
---|---|---|

100 | 245 | 123 |

125 | 310 | 155 |

150 | 360 | 180 |

200 | 480 | 240 |

### How do you size a circuit breaker for a motor?

You must size the overloads no more than 115% to 125% of the motor nameplate current rating, depending on the conditions [430.32(A)(1)]. You must size the short-circuit ground-fault protection device from 150% to 300% of the motor FLC [Table 430.52].

### How do you calculate motor overload current?

The overloads are determined using 125% of the FLA, 7A x 1.25 = 8.75A. The maximum allowable size for the overloads is 9.8A. The overloads can be sized at 140% of the FLA if the overloads trip at rated load or will not allow the motor to start, 7A x 1.4 = 9.8A.

**How do I size a motor overload?**

#### How many HP is 30 amps?

Common Amps to Horsepower Conversions

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

15 A | 2.17 HP | 90% |

20 A | 2.9 HP | 90% |

25 A | 3.62 HP | 90% |

30 A | 4.34 HP | 90% |