Calculation of Resistance to Ground：One Ground Rod
Resistance to Ground,One Ground Rod,Ground resistivity,Length of vertical ground rod,Radius of vertical ground rod.
：H.B.DWIGHT：『Calculation of Resistances to Ground』,American Institute of Electrical Engineers,1936,Volume: 55 Issue:12,pp.1319 - 1328.
・ρ：Ground resistivity(Ω･m).Cited from Reference.
・L：Length of vertical ground rod
・a：Radius of vertical ground rod
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