What is the acceptable earth resistance value? - Ask the Experts
What is the acceptable earth resistance value? IEEE 80 and IEC 60364 define limits by application: less than 1 ohm for substations, 5 ohms for commercial buildings, and 25 ohms for residential. E&S Grounding explains the standards, measurement methods, and what to do when resistance is too high.
Mohammad asked: What Is An Acceptable Earth Ground Resistance Value, 5 Ohm Or 25 Ohm?
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