Fault Loop Impedance Calculator 💯 No Ads

If a calculator determines your $Z_s$ is too high (exceeds the max limit for your breaker):

The calculation is based on Ohm’s Law ($I = V / R$), adapted for AC circuits. fault loop impedance calculator

Zs = Ze + (R1 + R2)

Where:

$$Z_s = \fracVI_a$$

While a calculator is a design tool, it must be verified onsite using an Earth Fault Loop Impedance Tester. If a calculator determines your $Z_s$ is too

Several online fault loop impedance calculator tools are available, including: fault loop impedance calculator