400V, 50kA prospective earth fault current, 0.1s disconnection time (via MCCB), copper conductor with PVC insulation.
[ S = \frac\sqrtI^2 \times tk ]
There is a dangerous misconception that because the earth doesn't carry current under normal conditions, it can be small. Remember: the earth cable must carry more current than the live cable, but for a much shorter time. It faces the toughest test during a fault. earth cable size
The job of an earth cable is to provide a low-resistance path for fault current to travel back to the source. 400V, 50kA prospective earth fault current, 0
This is the cable that connects your main distribution board (consumer unit) to the supplier’s earth terminal or the earth rod. This cable has no phase conductor to compare against. 50kA prospective earth fault current