The best I have heard about is the protection the electric company provides right at the meter head. They pull the meter, put their device, and it (tries) to ground it there, before the house. Every fraction of inch of a wire has voltage differential, i.e. get it before it gets into the house. A breaker box has loss in the grounds. There are physical laws involved and one has to be realistic, no guarantees, only try to minimize damage.
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