Electrical earth electrode parallel model calculator

Calculate ideal parallel resistance with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use ideal parallel resistance to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Independent electrode resistances (ohms)
30,40,50
Ideal parallel resistance (ohms)
12.765957

Try another scenario

Independent electrode resistances (ohms)
[31, 40, 50]
Ideal parallel resistance (ohms)
12.943633
Calculation method

Calculation method

Ideal parallel resistance (ohms)

Ideal independent parallel resistances; real mutual soil coupling is not modeled.

Symbols and units
a
Independent electrode resistances (ohms)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • User-supplied measurements and assumptions; Ideal independent parallel resistances; real mutual soil coupling is not modeled. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
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