I have a home with separate flat on the grounds. Our system, in South Africa, has 230V live and neutral, supplied by the national grid operator through a distribution board, via isolator. It then goes via the earth leakage detection isolator to various circuits. We have a 4 ft earth spike outside the main building, driven into the ground, to which all the earth connections of the building are connected.
I extended and added a flat, supplying it using an 80A capable armour cable from the main house board. The shielding and earth wire for the armour cable is connected to earth at the main house distribution board bar and the flat distribution board bar to supply earth to the flat.
I want to add an earth spike at the flat and connect it to the earth bar in the flat's distribution board for redundancy. Is this a good or a bad idea? I asked on another forum and someone suggested it was bad... going into an explanation about ground loops and huge current... I gathered he is not an electrical engineer so I thought I'd ask here before I make any decisions.
Thanks in advance!