Enter the phase A current (amps), the phase B current (amps), and the phase C current (amps) into the calculator to determine the Neutral Current.

## Neutral Current Formula

The following formula is used to calculate the Neutral Current.

In = (A^2+B^2+C^2-A*B-A*C-B*C)

- Where In is the Neutral Current (amps)
- A is the phase A current (amps)
- B is the phase B current (amps)
- C` is the phase C current (amps)

## How to Calculate Neutral Current?

The following example problems outline how to calculate Neutral Current.

**Example Problem #1**

- First, determine the phase A current (amps). In this example, the phase A current (amps) is determined to be 10 .
- Next, determine the phase B current (amps). For this problem, the phase B current (amps) is measured to be 23 .
- Next, determine the phase C current (amps). In this case, the phase C current (amps) is found to be 3.
- Finally, calculate the Neutral Current using the formula above:

In = (A^2+B^2-+C^2-A*B-A*C-B*C)

Inserting the values from above and solving yields:

In = (10^2+23^2+3^2-10*23-10*3-23*3) = 309 (amps)

**Example Problem #2**

Using the same method as above, determine the variables required by the formula. For this example problem, these are:

phase A current (amps) = 5

phase B current (amps) = 41

phase C current (amps) = 2

Enter these given values into the calculator or above yields:

In = (5^2+51^2+2^2-5*41-5*2-41*2) =** **2333 (amps)