Earthing / Grounding Quick Calculator
Use for quick estimates. For final design and safety checks use standards (IEEE-80, IEC) and a full site study.
1) Soil resistivity (Wenner 4-pin)
2) Single vertical rod resistance (approx)
3) EPR (Earth Potential Rise)
4) Earthing conductor sizing (adiabatic)
Notes: Rod resistance formula is approximate. For grid design, use fall-of-potential tests or full numerical methods (IEEE-80). Adiabatic k varies with material and allowed temp rise — check local code/manufacturer.
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