**Contents**show

## How many amps does a 30 hp motor draw at 480 volts?

AC Motor Full Load Amperes

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

30 | 92 | 40 |

40 | 120 | 52 |

50 | 150 | 65 |

60 | 177 | 77 |

## What size breaker do I need for a 25 hp motor?

Full Load Current: Three Phase AC Motors

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

10 | 230V 460V | 50 30 |

15 | 230V 460V | 70 40 |

20 | 230V 460V | 100 50 |

25 | 230V 460V | 100 50 |

## How do you determine the breaker size on 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].

## What size breaker do I need for a 30 amp motor?

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

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

15 | 230 V 460 V | 70 40 |

20 | 230 V 460 V | 100 50 |

25 | 230 V 460 V | 100 50 |

30 | 230 V 460 V | 125 70 |

## How many amps does a 30 kW motor draw?

Three Phase Motors

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

22 kW | 30 | 74 |

30 kW | 40 | 99 |

37 kW | 50 | 130 |

45 kW | 60 | 147 |

## What size wire is 30 amp?

For a maximum of 30 amps, you’ll need a wire gauge of 10. The most common household item that requires a 30 amp circuit is a central air conditioner.

## How much does a 30 amp breaker cost?

The average cost to install a new circuit breaker is $187. The cost is as low as $130 for 15 amp to 30 amp breakers and as high as $280 for breakers up to 200 amps or when the circuit breaker is an older one with limited availability.

## How many amps can a 20 amp breaker handle?

The standard for most household circuits are rated either 15 amps or 20 amps. An important note to remember is that circuit breakers can only handle about 80% of their overall amperage. That means a 15-amp circuit breaker can handle around 12-amps and a 20-amp circuit breaker can handle about 16 amps.

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

For AC, 3 phase supply (400 /440 Volts) the rating of Breaker will be 6 Amps, 3 Pole or 4 Pole.

## What size breaker do I need for a 10 amp motor?

If you are connecting your 10 amp load to a standard electrical circuit in North America, a 15 or 20 amp circuit would be appropriate. If it’s a motorized load, I recommend a 20 amp circuit because inrush current at startup can “nuisance” trip a 15 amp breaker.

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

A 3 HP will be about 18amps. the circuit breaker for the 13 amps should be 20 amps. For the 3 HP the breaker should be 30 amps .