Earthing / Grounding Calculator
The Earthing / Grounding Calculator finds the earth-electrode resistance and grounding-conductor size for a system, checked against the limit. Example: for four 3 m rods in 50 Ω·m soil for a TN-S system, Earth resistance = 3.73 Ω, Limit = 10 Ω, Result = PASS (per PEC 2017 Art. 2.50 | IEC 60364-5-54).
How it works
Computed from your inputs per PEC 2017 Art. 2.50 | IEC 60364-5-54.
Worked example (Electrical & Power)
Inputs: four 3 m rods in 50 Ω·m soil for a TN-S system.
| Result | Value |
|---|---|
| Earth resistance | 3.73 Ω |
| Limit | 10 Ω |
| Result | PASS |
Computed live by WorkHive's calculation engine; standard: PEC 2017 Art. 2.50 | IEC 60364-5-54.
How to use this calculator
- Enter the figures for the duty you are sizing: the worked example below uses four 3 m rods in 50 Ω·m soil for a TN-S system.
- The calculator returns Earth resistance, Limit, Result, computed per PEC 2017 Art. 2.50 | IEC 60364-5-54.
- Check the worked example to confirm the method matches how you would do it by hand, then run your own numbers in the interactive tool.
FAQ
What is a earthing grounding resistance calculator?
The Earthing / Grounding Calculator is a free online tool that computes finds the earth-electrode resistance and grounding-conductor size for a system, checked against the limit. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following PEC 2017 Art. 2.50 | IEC 60364-5-54. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive's engineering calculators are free to use, no sign-up needed for the tools. WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive Earthing / Grounding Calculator in WorkHive: free, no sign-up needed for the calculators.