That information is on the motor dataplate. You can calculate the approximate running current from knowing 1 HP = 750 watts and then multiply by the inverse of the motor’s efficiency (i.e., 80% = 1.25X).

## 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 |

## How do you calculate HP to current?

Knowing that we can write hp to amps formula for direct current (DC) as: **I = P * 746 / (V * η)** . As the SI unit of power is the watt, it’s common to convert units before estimating the amperage. A rule of thumb states that you should multiply the power in hp by 746 to get the power in watts.

## How do you calculate motor current?

**The motor FLA calculator uses the following formulas:**

- Single Phase AC Motor FLA (Amperes) = (P [kW] × 1000) / (V × cos ϕ)
- Single Phase AC Motor FLA (Amperes) = (P [HP] × 746) / (V × cos ϕ × η)
- Three Phase AC Motor FLA (Amperes) = (P [kW] × 1000) / (V × 1.732 × cos ϕ)

## What is the starting current of 1 HP motor?

For a 1 HP 3phase induction motor draws a current =W /V, so 1 HP is equal to 746 watts, or rounded off to 750 watts, so it will be 750 /415 volts =**1.7 amperes**, approximately and at a powerfactor at unity means 1.

## 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 is needed for a 5hp motor?

Common Horsepower to Amps Conversions

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

4 HP | 27.6 A | 120 V |

4.5 HP | 31.1 A | 120 V |

5 HP | 34.5 A |
120 V |

10 HP | 69.1 A | 120 V |

## How many kVA is 1 HP?

Equivalent Horsepower and kVA Ratings

HP | kVA |
---|---|

1 HP | 0.933 kVA |

2 HP | 1.87 kVA |

3 HP | 2.8 kVA |

4 HP | 3.73 kVA |

## What is the efficiency formula?

Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula **r=P/C**, where P is the amount of useful output (“product”) produced per the amount C (“cost”) of resources consumed.

## How much power does a 2 hp motor use?

So, 1 HP for 24 hour = 746×24= 17904 Watt-hour which is equal to 17904/1000= 17.904 units. How many kWh does a 10 hp motor use?

…

How many watts does a 1 hp electric motor use?

Horsepower | Watts | Rounded Watts |
---|---|---|

1 hp | 745.699872 W | 746 Watts |

2 hp | 1491.399744 W |
1491 Watts |

3 hp | 2237.099616 W | 2237 Watts |

## What is the formula for current?

The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as **I = V/R**. The SI unit of current is Ampere (Amp).