How To Select Earthing Cable Size !exclusive! Now

| Conductor material | PVC insulation (70°C) | XLPE (90°C) | Bare copper | |-------------------|----------------------|-------------|-------------| | Copper (Cu) | 115 | 143 | 226 | | Aluminum (Al) | 76 | 94 | 148 |

How to Select the Correct Earthing Cable Size (Step-by-Step Guide) how to select earthing cable size

Selecting the wrong earthing cable size can lead to equipment damage, fire, or fatal electric shock. The earthing conductor must be sized to safely carry fault current long enough for the overcurrent device (breaker or fuse) to trip. | Conductor material | PVC insulation (70°C) |

Copper, PVC insulated, ( I = 5000A ), ( t = 0.2s ) Step 3: Follow Simplified Table (BS 7671 /

[ S = \frac\sqrt5000^2 \times 0.2115 = \frac\sqrt25,000,000 \times 0.2115 = \frac\sqrt5,000,000115 = \frac2236115 \approx 19.4 \text mm^2 ] → Select copper cable. Step 3: Follow Simplified Table (BS 7671 / IEC) If you don’t want to calculate, use this simplified copper earthing conductor size relative to the phase conductor: