Grounding (Earthing) Resistance Calculation
Vertical rod, horizontal strip, composite grid resistance and permissible contact/step voltage.
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Soil & system
Soil resistivity ρ (Ω·m)
Ground-fault (earthing) current I (A)
Fault duration t (s)
Surface layer ρb (Ω·m)
⬇
Vertical rod electrode
Rod type
Flat steel (width b)
Angle steel (side b)
Round / pipe (diameter d)
Rod length l (m)
Width b / diameter d (m)
Number of rods n
Utilization factor η
Rod burial depth h (top of rod, m)
➡
Composite grid
Grid area A (m²)
Total buried conductor length L (m)
Grid burial depth hg (m)
Calculate
Reset
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Results