[mikemal]

Hi , Im mike, 29 years old, I live in Mauritius. I would like to know how to size my eathing wire since my supply wire is 6 mm2.

Thanks

[tkrussell]

Earthing conductor is usually based on the size of overcurrent protection device, not of the associated branch circuit wire size.

6 mm2 wire is close to #10 AWG wire in the US, which is good for 30 amps. So using the code here to size the earth wire for your circuit, the equivalent wire would be 4 mm2

[engsadi]

Hi

Can u tel me what are the thumb rules for chosing earth cable for small cable size and large cable size

[tkrussell]

The rule of thumb is to consult with the Code or Standard that applies in your geographical area.