# Quick Answer: How many amps does a motor use?

Contents

## How many amps should a motor draw?

AMP DRAW BASED ON HORSEPOWER

HP 1 Phase Amps 3 Phase Amps
115 volt 230 volt
1 16 4.2
1-1/2 20 6
2 24 6.8

## How many amps does a 1.5 hp motor use?

For example a 1.5 HP Baldor motor turning 3450 rpm draws 13.4 amps on 120 volt service.

## How do you calculate amps on a motor?

Given horsepower and volts, it is possible to calculate amps. The calculation of amps uses Ohm’s Law, which is amps times volts equals watts. Multiply the horsepower by 746 watts. For example, an engine at two horsepower with 230 volts would be calculated as two horsepower times 746 watts, which equals 1492.

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

Example: A 5 HP motor at 230V, 3PH is12. 4 amps.

## How many amps is a 50 hp motor?

HP 200 Volts 440-480 Volts
40 120 52
50 150 65
60 177 77
75 221 96

## What size breaker do I need for a 15 amp motor?

A 12 wire and a 20A breaker is needed. 15A ends can be used on 20A circuits.

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## How many HP is 15 amps?

Common Amps to Horsepower Conversions

Amps Horsepower Efficiency
10 A 1.45 HP 90%
15 A 2.17 HP 90%
20 A 2.9 HP 90%
25 A 3.62 HP 90%

## How many horsepower is 2.5 amps?

Common Horsepower to Amps Conversions

Horsepower Amps Voltage
2.5 HP 17.3 A 120 V
3 HP 20.7 A 120 V
3.5 HP 24.2 A 120 V
4 HP 27.6 A 120 V

## How do I convert HP to amps?

How to use the hp to amps calculator?

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

## How many amps is a 7.5 hp motor?

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

3 9 4.5
5 15 7.5
7.5 22 11
10 27 14

## What is nominal current of motor?

Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.

## How many amps is a 3 phase?

The average voltage is 453 plus 458 plus 461 divided by 3 which equals 457 volts. The average current is 14.1 plus 13.9 plus 13.8 divided by 3 which equals 13.9 amps.

## 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.