Eh? As I said, in the very worst possible situation (unless you folk somehow let HV onto the LV network ), of 230V between the connecting cable and earth, one would be very unlikely to get more than about 12A flowing along that cable and down the electrode (at an electrode impedance around 20Ω - pretty unusual for a domestic rod). To get the ~60A needed to require a 10mm² cable would be incredibly unlikely with a domestic rod, wouldn't it?I specified internal & external faults e,g, loss of neutral on the service cable ... loss of neutral on the main ... both of which could lead to load current being carried by that electrode and connecting cable
What sort of current do you envisage you could get to flow down the rod - and under what circumstances?
Kind Regards, John