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Earth rod resistance

Estimate a single earth rod’s resistance from its dimensions and uniform soil resistivity.

Single vertical rod in uniform soil approximation. Layered soil, parallel electrodes and touch/step voltage are not modelled.

min 1 · max 100000

min 0.1 · max 50

min 1 · max 200

Results

Enter inputs above, then tap Calculate.

Method and assumptions

Single vertical rod in uniform soil approximation. Layered soil, parallel electrodes and touch/step voltage are not modelled.

Check the stated method and limits against your installation. Results are calculation aids, not certification.

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Calculation model 2026-11-02.1