Wiring and Protection
Grounding Voltage Rise Calculator
Grounding Voltage Rise converts the entered electrical measurements into ground potential rise. Use it to the ground potential rise calculation.
Enter values for ground potential rise
Use one consistent electrical operating case for all fields.
How Grounding Voltage Rise works
The example applies Vrise = Ifault × Rground. Grounding Voltage Rise uses Fault current, Ground resistance to report Ground potential rise.
With the loaded values, ground potential rise evaluates to 800.00 V. Use separate cases for competing input values. Compare this result with Breaker Load Margin Calculator when unused breaker capacity is also needed.
Inputs for Grounding Voltage Rise
Fault current and Ground resistance belong to Grounding Voltage Rise. Keep source units with fault current.
Use the defaults to understand the output, then enter the real circuit or energy data.
- Fault current
- Example entry: 1000 A.
- Ground resistance
- Example entry: 0.8 Ω.
Reading the Grounding Voltage Rise result
This output represents Grounding Voltage Rise.
Component selection requires more than the arithmetic result; verify margins, transients, and published ratings.
Measurement and units
Treat these results as planning arithmetic; conductor and protective-device selection must follow the applicable electrical code and equipment instructions. Check prefixes on fault current.
Alternatives should share one documented measurement convention.
Limits of this calculation
Touch and step potentials need a site-specific safety analysis.
Unlisted circuit behavior remains outside the computed result. Unentered effects remain outside Grounding Voltage Rise.
A useful Grounding Voltage Rise comparison
Record ground potential rise before testing a different fault current value. For contact power loss, use Contact Resistance Loss Calculator.
Document the alternate fault current source.
Questions about Grounding Voltage Rise
What does Grounding Voltage Rise calculate?
Grounding Voltage Rise reports ground potential rise.
Can Fault current be zero?
For Grounding Voltage Rise, measure any zero fault current directly.
Why can ground potential rise differ from measurement?
Touch and step potentials need a site-specific safety analysis. Recheck fault current.
Should the result be rounded?
Keep extra digits while comparing cases, then round to the precision supported by fault current.