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Ok, let me in order, reply, Mr DPC, For a single phase to earth fault, the return must be equally capable of conducting as the phase conductor to maximise scc and clear the fault asap. As faults are unpredictable it makes sense to prepare for worst scenario. Mr david beach and mr DPC, Utility...

Connection to star point by earth conductor must be greater or equal to phase conductor. Resistive (impedance) earthing will limit fault current, BIG BUT,This will allow dangerous voltages to appear exactly where you do not want them during a fault. You are in fact dicing with death.Balance the...