For single phase motors, NEC table 430-148 gives 230 Vac full load current of 8 amps for a 1 HP motor. Note, that a 1 HP motor not fully loaded (good practice) will show current draw of less than 8 amps.

## How do you calculate the starting current of a motor?

An induction motor, starting “across the line”, will typically have an **instantaneous draw 6x the kw it is rated to run at**. e.g. a 10 hp motor is rated at 7.46 kw, so on starting it may draw 75 kw. On 480 volts 3 phase, the amperage will be I = W / (E x 1.73) = 75,000 / (480 x 1.73) = 90.4 amps.

## How much current does a 1 HP motor draw?

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 is the full load current of a 1 HP motor?

Full Load Current: Three Phase AC Motors

Motor Horsepower | Motor Ampere | |
---|---|---|

1 | 230V 460 V |
4.2 2.1 |

1-1/2 | 230V 460V | 6.0 3.0 |

2 | 230V 460V | 6.8 3.4 |

3 | 230V 460V | 9.6 4.8 |

## How many amps is 3 horsepower?

AC Motor Full Load Amperes

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

1 | 4.8 | 2.1 |

1.5 | 6.9 | 3.0 |

2 | 7.8 | 3.4 |

3 | 11 |
4.8 |

## How much current would a 1.5 HP 240v motor draw?

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

## 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**.

## How many kW is a 5hp motor?

Hp to kW Conversion Table

Horsepower | Kilowatts | Rounded Kilowatts |
---|---|---|

1 hp | 0.745699872 kW | 1 kW |

5 hp | 3.72849936 kW |
4 kW |

10 hp | 7.45699872 kW | 7 kW |

15 hp | 11.18549808 kW | 11 kW |

## How do I convert HP to amps?

**How to use the hp to amps calculator?**

- Estimate the power in watts (the nominator of the expression), 1 hp * 746 = 746 W ;
- Evaluate the product in the denominator, 200 V * 0.92 * 90% = 165.6 V . …
- Make a fraction of these numbers and find the final horsepower to amps value, 746 / 165.6 = 4.505 A .