Fault Loop Impedance Calculation Patched ❲Instant❳

Copper increases in resistance as it gets hot. Since cables heat up under load and significantly more during a fault, we apply a correction factor (usually for PVC cables). The Final Design Formula:

Where:

Choose the right (Type B breakers trip easier than Type C). fault loop impedance calculation

Using a loop impedance tester at the main distribution board. Copper increases in resistance as it gets hot