Sans 10142-1 edition 3 effective Feb 2022

[Coen]

It is a 4mm2 cable

[Derlyn]

For a 4mm2 cable , 3phase balanced load

10 Amp circuit breaker 209 meters max

15 Amp circuit breaker 139 meters max

20 Amp circuit breaker 104 meters max

25 Amp circuit breaker 83 meters max

30 Amp circuit breaker 69 meters max

Hope this helps, brother.

So for 100 meters of 4mm cable, the largest breaker you can use is 20 Amp.

[Derlyn]

[Coen]

Thanks Derlyn. Much appreciated