10 HP motor is invariably 3 phase motor, and in India, rated for 440 V. Current at full load will be 13.1 Amp. Fuse rating will be more than double of this to account for starting currents, and correct rating will be 30 Amps for wired fuses.

## How do you find the fuse rating on a 3 phase motor?

Motor Fuse sizing calculation:

- For single-phase: Motor fuse rating = PkW x 1.25 / (pf x V(V)) …
- For Three-phase: Motor fuse rating = PkW x 1250 / (1.732 x power factor x V(V-L)) …
- Fuse rating Calculation: …
- For single-phase: …
- For Three-phase transformer, …
- Example:

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

Full Load Current: Three Phase AC Motors

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

5 | 230V 460V | 15 15 |

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

10 | 230V 460V | 50 30 |

15 | 230V 460V | 70 40 |

## How do I know how much fuse I need?

The simple calculation is watts divided by volts equals amps. After you have calculated this, it is a simple case of adding around 10% to the value and choosing the nearest fuse to match. This is a more precise method then just guessing should you require a 3, 5, or even 13 amp fuse.

## How do you size a fuse for a motor?

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 type of fuse is best for motor protection?

Time delay fuses are the most useful fuses for motor branch circuit application. A time delay fuse can be sized closer to motor full load current, providing a degree of overload protection, better short circuit protection, and possible use of a smaller disconnect switch.

## How do you size a 12v fuse?

Find the size of fuse by multiplying the amps required by the device (2) by 1.5. 2×1.25 = 2.5 then we will round up to the nearest fuse size (in multiples of 5 amps) which would call for a 5 amp fuse. Cross Reference that fuse size to verify that it’s below the Maximum fuse size called out by this chart.

## How many amps is a 40 hp motor?

AC Motor Full Load Amperes

HP | 200 Volts | 550-600 Volts |
---|---|---|

25 | 78.2 | 27 |

30 | 92 | 32 |

40 | 120 | 41 |

50 | 150 | 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 |

## How many amps does a 10 HP 3 phase 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 |

## What are the 3 types of fuses?

Different Types of Fuses – Constriction, Working & Characteristics

- DC Fuses.
- AC Fuses.
- Cartridge Fuses.
- D – Type Cartridge Fuse.
- HRC (High Rupturing Capacity) Fuse or Link Type Cartridge Fuse.
- High Voltage Fuses.
- Automotive, Blade Type & Bolted Type Fuses.
- SMD Fuses (Surface Mount Fuse), Chip , Radial, and Lead Fuses.

## What appliances need a 5 fuse?

The clock radio has 3amps. 5 Amp coffee maker. 13 Amp Dishwasher.

## How many watts can a 5 amp fuse take?

If your lighting circuit at home is protected by a typical 5 amp fuse you can multiply this by the voltage to get 1150 Watts.

## What is the fuse rating can be selected for a 10 HP induction motor?

10 HP motor is invariably 3 phase motor, and in India, rated for 440 V. Current at full load will be 13.1 Amp. Fuse rating will be more than double of this to account for starting currents, and correct rating will be 30 Amps for wired fuses.

## What is the standard fuse size?

Standard sizes for fuses and fixed trip circuit breakers, per 240.6, are 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 125, 150, 175, 200, 225, 250, 300, 350, 400, 450, 500, 600, 700, 800, 1000, 1200, 1600, 2000, 2500, 3000, 4000 5000, and 6000 amps.

## How do you choose a fuse for a motor?

Motors should be fused with a time-delay fuse rated 175% of the motor’s full load operating amperage, 250% of the full load operating amperage if a circuit breaker is used. The wire to a motor must be rated to carry 25% more amperage than the motor draws when operating at full load.