Most installations involve some form of lightning protection system which is connected to an earth electrode. The function of the earth electrode is to dissipate the lightning strike safely in to the ground. Often the performance of the earth electrode is specified and verified by stating a maximum resistance and ensuring that the installed system meets this. Resistance is easily understood and an easy property to measure. However, it is only indicative of the performance of the earth electrode under lightning conditions. Other parameters have a more signification effect.
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