Earth Cable Size Chart [WORKING]

The earth wire should be half the size of the phase wire (S/2). Why Does Size Matter?

| Phase Conductor Size (mm²) | Min. Earth Conductor Size (mm²) – Copper | |----------------------------|-------------------------------------------| | ≤ 16 | Same as phase conductor | | 25 | 16 | | 35 | 16 | | 50 | 25 | | 70 | 35 | | 95 | 50 | | 120 | 70 | | 150 | 70 | | 185 | 95 | | 240 | 120 | | 300 | 150 | earth cable size chart

If you aren't looking at a chart, many electricians use these two standard rules of thumb: The earth wire should be half the size