**Contents**show

## How many amps does a 20 hp motor?

AMP DRAW BASED ON HORSEPOWER

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

115 volt | 208 volt | |

10 | 100 | 30.8 |

15 | — | 46.2 |

20 | — | 59.4 |

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

Full Load Current: Three Phase AC Motors

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

7-1/2 | 230V 460V | 40 30 |

10 | 230V 460V | 50 30 |

15 | 230V 460V | 70 40 |

20 | 230V 460V | 100 50 |

## How do you convert HP to amps?

How to Convert Horsepower to Amps

- Amps = (Horsepower × 746) ÷ Efficiency ÷ Volts.
- Watts = Horsepower × 746.
- Watts = Wattsη
- Amps = Watts ÷ Volts.
- Amps = HP × 746V × η × PF.

## What size breaker do I need for a 30 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 does a 20 hp motor draw at 480 volts?

AC Motor Full Load Amperes

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

20 | 62.1 | 27 |

25 | 78.2 | 34 |

30 | 92 | 40 |

40 | 120 | 52 |

## How much current does a motor draw?

Calculate the amps used by dividing the wattage by the voltage. For example a 500-watt motor — running on 50 volts — will draw 10 amps. A motor with the same wattage — running on 20 volts — will use 25 amps. This is the theoretical number of amps used by the motor.

## 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 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 many amps does A 7.5 hp motor draw at 480 volts?

AC Motor Full Load Amperes

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

5 | 17.5 | 7.6 |

7.5 | 25.3 | 11 |

10 | 32.2 | 14 |

15 | 48.3 | 21 |

## How many amps does a 1.5 HP 220v motor draw?

The 1.5 HP Baldor motor that turns at 1725 will draw 18 amps according to its name plate.

## How many HP is 15 amps?

Common Amps to Horsepower Conversions

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

10 A | 1.45 HP | 90% |

15 A | 2.17 HP | 90% |

20 A | 2.9 HP | 90% |

25 A | 3.62 HP | 90% |

## How many amps does a 2.2 kW motor draw?

Three Phase Motors

MOTOR RATING | HP | |
---|---|---|

0.75 kW | 1 | 3.2 |

1.1 kW | 1.5 | 4.5 |

1.5 kW | 2 | 5.8 |

2.2 kW | 3 | 8.7 |

## What size breaker do I need for a 230 volt well pump?

Pumps Under Maximum Load

Well Pump (HP) | Volts | Req. Circuit Breaker (Amps) |
---|---|---|

0.5 HP | 110V | 15A |

0.5 HP | 230V | 15A |

0.75 HP | 230V | 20A |

1 HP | 230V | 25A |

## What wire do I use for 40 amps?

For a maximum of 40 amps, you’ll need a wire gauge of 8. Many electric cooking appliances require 40 amps such as electric cooktops.

## How many amps does a 5 HP single phase motor draw?

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. |