# What size breaker do I need for a 30 hp motor?

Contents
Motor Horsepower Breaker Size
25 230 V 460 V 100 50
30 230 V 460 V 125 70
40 230 V 460 V 175 100
50 230 V 460 V 200 150

## How many amps does a 30 hp motor use?

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 30 amp motor?

Any circuit fused for 30 amps must use a minimum of 10 ga copper or 8 ga alu. Longer runs may require an upgrade of wire size.

## What size breaker do I need for a 25 hp motor?

Full Load Current: Three Phase AC Motors

Motor Horsepower Size Breaker
10 230V 460V 50 30
15 230V 460V 70 40
20 230V 460V 100 50
25 230V 460V 100 50

## How do I convert HP to amps?

Convert to Amps

1. Amps = 1 HP × 746 W120 V × .9.
2. Amps = 746120 V × .9.
3. Amps = 746108.

## Will 6 gauge wire fit in a 30 amp breaker?

“Twelve-gauge wire is good for 20 amps, 10-gauge wire is good for 30 amps, 8-gauge is good for 40 amps, and 6-gauge is good for 55 amps,” and “The circuit breaker or fuse is always sized to protect the conductor [wire].”

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

You need 50 amp rated wire with a 50-100 amp breaker. 7.5hp=40 amps x 250%=100 amp breaker on #8 Thhn. If a 100amp breaker isn’t sufficient to start the motor without tripping I can then go up to a maximum of 400% of the motor rating.

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

How to Calculate How What Size Circuit Breaker a Machine will Need:

HorsePower of Main Motor 220 Volts, 1 phase 220 Volts, 3 phase
1 Hp 5.6 Amps 2.8
2 11.2 5.6
3 16.8 8.4
4 22.4 11.2

## What size breaker do I need for a 40 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

## What size breaker do I need for a 5 hp motor?

A 5hp single phase AC motor has a load current of 28 Amps. So 10GA. wire with a 30 Amp breaker will work.

## What size breaker do I need for a 1.5 hp motor?

Okay, a 1.5 HP motor at 115 volts the Full Load Current (FLC) is 20 amps, (table 430.148 NEC) to figure out short circuit and ground fault protection you take 250% x FLC, so 250% x 20 (FLC) = 50 amps, this is your circuit breaker size.

## How many amps does a 100 hp motor draw?

Here are the Full Load Amp (FLA) values for typical 230VAC and 480VAC 3 phase motors.