Motor HP |
NEMA amps | Phase Wires (AWG) |
---|---|---|

7 1/2 | 11 | 12 |

10 |
14 | 10 |

15 | 21 | 10 |

20 | 27 | 8 |

## What size breaker do I need for a 10 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 many amps does a 10 hp motor draw?

AMP DRAW BASED ON HORSEPOWER

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

115 volt | 208 volt | |

5 | 56 | 16.7 |

7-1/2 | 80 | 24.2 |

10 | 100 | 30.8 |

## How do you calculate the cable size of an HP motor?

Size of Cable for Branch circuit which has Single Motor connection is 125% of Motor Full Load Current Capacity. Example: what is the minimum rating in amperes for Cables supplying 1 No of 5 hp, 415-volt, 3-phase motor at 0.8 Power Factor. Full-load currents for 5 hp = 7Amp. Min Capacity of Cable= (7X125%) =8.75 Amp.

## How do I choose a motor wire size?

You must size the conductors at 125% of the motor FLC [430.22(A)]. 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 50 hp motor?

Electrical motor wiring data – NEMA amps, starter size, HMCP size for motors ranging 1/2 to 500 hp

Motor HP | NEMA amps | Phase Wires (AWG) |
---|---|---|

30 | 40 | 6 |

40 | 52 | 4 |

50 | 65 | 4 |

60 | 77 | 2 |

## What size wire do I need for a 1 hp motor?

Single Phase (230 Volt) – Wire Size Selection Guide* | ||
---|---|---|

HP | Cable Length | |

1/2 | 14 | 14 |

3/4 | 14 | 14 |

1 | 14 | 14 |

## How do I convert HP to amps?

Converting horsepower to amps can be done in a few simple steps, or using this simple formula.

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

## How many amps does a 5 hp motor use?

A 5 HP motor at 230V, 3PH is12.

Using the formula above, multiply 12.4 amps by 10% for a result of 1.24. Add this total to 12.4 for a total of 13.64 amps.

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

How many watts does a 2 HP motors have? If a 2 horse power motor is doing 2 horsepower of work then in the load about 1500 Watts of energy is used in the load.

## What size cable do I need for 32 amps?

Cable Size Ratings in Amps

Cable size | Rating in Amps |
---|---|

2.5mm | 13.5 |

4.00mm | 17.5 |

6.00mm | 23.5 |

10.00mm | 32 |

## What is the size of cable?

Cable Size & Current Rating Chart

Cross Section (mm2) | Approximate Overall Diameter (mm) | Current Rating |
---|---|---|

1.5 | 2.9 | 17.5 |

2.5 | 3.53 | 24 |

4.0 | 4.4 | 32 |

6.0 | 4.68 | 41 |

## How many watts can a 2.5 mm cable take?

Choosing the correct size cable

Conductor Size | Current | Maximum power (Watts) |
---|---|---|

1.25 mm2 | 13 amps | Up to 3120 Watts |

1.5 mm2 | 15 amps | Up to 3600 Watts |

2.5 mm2 | 20 amps | Up to 4800 Watts |

4.0 mm2 | 25 amps | Up to 6000 Watts |

## What size breaker do I need for a 7.5 hp motor?

You need 50 amp rated wire with a 50-100 amp breaker.

## What wire do you use for 3 phase?

Some three-phase power supplies do use a fourth wire, which is a neutral wire. The two most common configurations of three-phase systems are known as wye and delta. A delta configuration has only three wires, while a wye configuration may have a fourth, neutral, wire.

## How do I choose a cable size for a specific load?

Selection of Cable

- Cable derating amp should be higher than full load current of load.
- Cable voltage drop should be less than defined voltage drop.
- No. of cable runs ≥ (Full load current / Cable derating current).
- Cable short circuit capacity should be higher than system short circuit capacity at that point.

30.06.2014