mixture helps damage caused specific mixture ground reducing includes checking qualified electrician maintenance installation earth electrode charcoal salt voltage components reference point voltage surges safely diverted excess voltage electrical current lowresistance path crucial component grounding pit earth pit conductive material electrical system pit dug backfill material ground backfill material physical pit dug backfill material installation earth resistance replenishing maintain moisture content local electrical codes protect electrical equipment plate buried deep copperplated steel rod importantly human life