Sparks wrote:

Sorry to butt-in here, but can you tell me how you measure earth rods?
What do you use to do the measuring, and what is the other test lead
connected to?

I usually use a Megger LT5 digital loop tester. It actually measures the
earth fault loop impedance for a whole circuit, so is not quite a true
reading of the electrode resistance in isolation, but does give a
reasonable indication. Obviously you need to disconnect the main
equipotential bonds when you take a reading so as not to include any
fortuitous lowering of impedance they may give you.

--
Cheers,

John.

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