TO start with electrical surges are not caused by lightening they are mains bound rises and falls in your supply voltage caused by numerous reasons . It has always been desirable to provide the lowest resistance / impedance to ground .I suspect that the coil you mention is a useless habit that allows the electrician to have some spare cable to remake the earthing without the wiring looking ugly . You will never be able to beat a lightening " strike " and as far as the least possible damage is concerned the odds are better on a slow horse than betting on a static discharge cos they dont follow any rules it all a guess good luck Don
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