Ground Resistance Calculator
Calculate ground resistance for electrical earthing systems with our comprehensive calculator. Determine earth electrode resistance based on soil resistivity, electrode type, and configuration for safe electrical installations.
Step 1: Electrode Specifications
Understanding Ground Electrodes
Ground resistance depends on electrode type, size, and soil conditions. Longer electrodes and multiple parallel rods typically yield lower resistance values for better earthing performance.
Step 2: Soil Parameters
About Soil Resistivity
Soil resistivity is the key factor affecting ground resistance. Moisture content, temperature, and soil composition dramatically impact resistivity values. Lower resistivity soils provide better grounding.
Ground Resistance Results
Calculated Ground Resistance
Soil Type Resistance Comparison
| Soil Type | Resistivity (Ω·m) | Ground Resistance | Rating |
|---|
Resistance Factors Breakdown
Ground Resistance Formula
R = (ρ / (2πL)) × ln(4L/d)
For a single vertical rod: R = Ground Resistance (Ω), ρ = Soil Resistivity (Ω·m), L = Rod Length (m), d = Rod Diameter (m). For multiple rods, additional factors account for mutual resistance.
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