# Best answer: What size wire do I need for a 10 hp motor?

Contents
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.

1. Amps = (Horsepower × 746) ÷ Efficiency ÷ Volts.
2. Watts = Horsepower × 746.
3. Watts = Wattsη
4. Amps = Watts ÷ Volts.
5. 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

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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

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

30.06.2014