How To Select — Earthing Cable Size

$$S = \frac\sqrt10,000^2 \times 0.1143 = \frac\sqrt10,000,000143 = \frac3162143 \approx 22.1 \text mm^2$$

calculating the fault current for your system? AI can make mistakes, so double-check responses Copy Creating a public link... You can now share this thread with others Good response Bad response 12 sites Earth Cable Size Calculator - kWCalc Earth Cable Size FAQs * How do you calculate earthing cable size? Earthing cable size is calculated using the adiabatic equation S... kWCalc Earth Cable Size Calculator - kWCalc Earth Cable Size FAQs * How do you calculate earthing cable size? Earthing cable size is calculated using the adiabatic equation S... kWCalc Sizing of protective earthing conductor Mar 20, 2026 — how to select earthing cable size

| Cross-sectional Area of Phase Conductor ($S_phase$) | Minimum Cross-sectional Area of Earth Conductor ($S_earth$) | | :--- | :--- | | | $S_earth = S_phase$ (Same size) | | $16 \text mm^2 < S_phase \le 35 \text mm^2$ | $S_earth = 16 \text mm^2$ | | $S_phase > 35 \text mm^2$ | $S_earth = S_phase / 2$ (Half size) | $$S = \frac\sqrt10,000^2 \times 0

| Conductor material | PVC insulation (70°C) | XLPE (90°C) | Bare copper | |-------------------|----------------------|-------------|-------------| | Copper (Cu) | 115 | 143 | 226 | | Aluminum (Al) | 76 | 94 | 148 | Earthing cable size is calculated using the adiabatic

If you don’t want to calculate, use this simplified copper earthing conductor size relative to the phase conductor: