# Best answer: How do you calculate the full load current of a motor?

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Look at the above formula, the three-phase full load current is equal to Power divided by the 3 times of product of line to neutral voltage and power factor. Here three-phase full load current is equal to the power divided by 1.732 times of line to line voltage and power factor.

## What is the full load current of a motor?

The full-load amperes (FLA) is the current the motor draws while producing its rated horsepower load at its rated voltage. NEC Tables. The full-load current (FLC) is the current value listed in Tables 450.247 through 450.250.

## How do you calculate load current?

Calculating an Electrical Load in a Simple Circuit

Let Power = Voltage * Current (P=VI). Let Current = Voltage/Resistance (I=V/R). Apply Kirchoff’s Second Law, that the sum of the voltages around a circuit is zero. Conclude that the load voltage around the simple circuit must be 9 volts.

## What is full load current of a 3 phase motor?

Full Load Current: Three Phase AC Motors

Motor Horsepower Motor Ampere
1 230V 460 V 4.2 2.1
1-1/2 230V 460V 6.0 3.0
2 230V 460V 6.8 3.4
3 230V 460V 9.6 4.8

## How much current is needed for a 5hp motor?

Common Horsepower to Amps Conversions

Horsepower Amps Voltage
4 HP 27.6 A 120 V
4.5 HP 31.1 A 120 V
5 HP 34.5 A 120 V
10 HP 69.1 A 120 V

## How many amps is 3 horsepower?

HP 200 Volts 440-480 Volts
1 4.8 2.1
1.5 6.9 3.0
2 7.8 3.4
3 11 4.8

## What is the formula for current?

The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).

## What is the efficiency formula?

Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula r=P/C, where P is the amount of useful output (“product”) produced per the amount C (“cost”) of resources consumed.

## What is the load unit?

A load unit is the combination of several items into a single-unit. With the single-unit, shipments are easily transported or moved from one place to another. The idea behind the load unit is the flexibility it brings when moving huge quantity of items at a time, instead of moving each item separately.

## What is the load current?

Load current in this context is simply the current thru the wire. As you say, a load consumes power. That power is delivered electrically, which means it is the product of voltage and current. The load current is just that current.

## How do you calculate the full load of a 3 phase motor?

Look at the above formula, the three-phase full load current is equal to Power divided by the 3 times of product of line to neutral voltage and power factor. Here three-phase full load current is equal to the power divided by 1.732 times of line to line voltage and power factor.

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## How do you measure a breaker for a 3 phase motor?

Breaker size must be rated for a minimum of 125% of the full-load current of the motor it is protecting, rounded up to the next standard breaker size. For example, the full-load current of a 5 HP motor at 460V is 7.6 Amps. The breaker must be sized for 7.6 * 1.25 = 10 Amps . 