Recommended Techniques For GroundingEquipment Grounding ConductorsIsolated Grounding SystemIsolated-Ground Wiring and Ground-Fault CurrentMerits of Isolated-Ground Wiring MethodsDemerits of Insulated Ground Wiring MethodsBranch-Circuit GroundingGround ResistanceGround RodsGround RingMeasure the resistance of the grounding electrode system to ground. Take reasonable measures to ensure that the resistance to ground is 25 ohms or less for typical loads. In many industrial cases, particularly where electronic loads are present, there are requirements which need values as low as 5 ohms or lessmany times as low as 1 ohm. For these s...See more on electrical-engineering-portal IEEE Xplore
Distribution System Grounding | part of Electric Power and Energy
Good system grounding provides the path for normal load and fault currents while maintaining load and controls temporary overvoltages. Good equipment grounding ensures personnel safety.
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