Earth Fault Loop Impedance Calculator |verified|

Should allow you to select specific MCB types (Type B, C, or D) and fuse types (BS 88, BS 1361).

The Ultimate Guide to Using an Earth Fault Loop Impedance Calculator earth fault loop impedance calculator

Identify the cable length and look up the milliohms per meter ( ) for that specific cross-sectional area. Multiply by the length. Should allow you to select specific MCB types

Max Zs = V0 / Ia = 230 / 100 = 2.30 Ω Actual Zs (0.809 Ω) ≤ 2.30 Ω ✅ Safe. earth fault loop impedance calculator