Yessir...'tis true Trumps [Linked Image]

We can use any type of 'earth electrode' ( rods, pipes, plates, tapes, wires, as well as u/g structural metalwork in foundations or welded re-bar in conrete ) and the recommended EFLI shouldn't exceed 200 Ohms.

4' is a handy length for a Cu rod if you're driving by hand. Around my area you'd be lucky to get 4" in the ground! [Linked Image] I use threaded rods; you can join them up and drive through to Oz if you want to get the figs down - or alternatively just daisy-chain them. I used to drive with a mallet, I now have a handy gizmo for the SDS-Max drill that thumps them in with no effort - too easy in fact!!

If hindsight were foresight, we'd all be millionaires!