Earthing / Grounding Calculator
Static · formula-only · worked example computed when this page was built · no live data
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, Allowable limit = 10 Ω, Compliance = 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. Anything the worked example does not state uses this calculator's standard default; the interactive version shows every input and lets you change it.
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 |
| Allowable limit | 10 Ω |
| Compliance | PASS |
Computed by WorkHive's calculation engine when this page was built; standard: PEC 2017 Art. 2.50 | IEC 60364-5-54.
How to use this calculator
- Read the worked example. It uses four 3 m rods in 50 Ω·m soil for a TN-S system and shows every number in the method.
- Follow the formula with your own figures: it returns Earth resistance, Limit, Result, computed per PEC 2017 Art. 2.50 | IEC 60364-5-54.
- To compute interactively, open the Earthing / Grounding Calculator inside WorkHive's free Engineering Design suite (link below). It runs the same method with your inputs.
FAQ
What is an earthing grounding resistance calculator?
The Earthing / Grounding Calculator is a free online tool that 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 is free: this worked example is open to everyone, and the interactive calculator runs inside the free Engineering Design suite after a free sign-up (your work is saved to your account). 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, and a free sign-up saves your calculations, BOMs and scope-of-works to your account.