Wire Ampacity Calculator

Calculate Wire Ampacity











Formula

The formula to calculate the wire ampacity is:

\[ I = \sqrt{\frac{T_c - T_a}{R_{dc} \cdot R_{ca}}} \]

Where:

Wire Ampacity Definition

A wire ampacity is defined as the maximum current that a conductor can carry continuously without exceeding the temperature rating.

Example Calculation 1

Let's assume the following values:

Using the formula:

\[ I = \sqrt{\frac{90 - 30}{0.5 \cdot 0.1}} = \sqrt{\frac{60}{0.05}} = \sqrt{1200} \approx 34.64 \text{ kiloamps} \]

The wire ampacity would be approximately 34.64 kiloamps.

Example Calculation 2

Let's assume the following values:

Using the formula:

\[ I = \sqrt{\frac{75 - 25}{0.3 \cdot 0.2}} = \sqrt{\frac{50}{0.06}} = \sqrt{833.33} \approx 28.87 \text{ kiloamps} \]

The wire ampacity would be approximately 28.87 kiloamps.