Ground Resistance Calculation Online

This calculator allows you to quickly calculate online the total resistance of the grounding system to the spreading of electric current (R). The calculator is suitable for calculations in the event that vertical grounding electrodes are used. The advantages of such grounding conductors is that when using electrodes, it is possible to achieve extremely low values ​​of loop resistance. To make it clearer to you - the smaller the R of the grounding system, the less will be the dangerous potential on the body of a damaged electrical appliance, for example, a washing machine. All that is required of you is to fill out the initial data in the formula and click the "Calculate" button, after which the calculator will perform an online calculation of grounding.

Topsoil
Climatic coefficient

Bottom layer

Number of vert. grounding

Depth of topsoil, H (m)
The length of the vertical ground electrode, L1 (m)
Depth of horizontal ground electrode system, h2 (m)
The length of the connecting strip, L3 (m)
Diameter of the vertical ground electrode, D (m)
Width of horizontal earthing switch, b (m)
Ground resistivity
Resistance single vert. earthing switch
Horizontal earthing length
Horizontal earthing resistance:
General resistance to electric current spreading

In the report, you will be presented with ready-made values ​​of resistivity of the soil, vertical and horizontal grounding, as well as the general resistance to spreading of electric current. All permissible values ​​of R of the grounding device are indicated in one of the most important books for electricians - PUE. For example, with a linear voltage of 220 volts in a single-phase network, the resistance of the charger should not exceed 4 ohms. After using the online calculator to calculate grounding, we recommend that you familiarize yourself with the following materials:

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One comment

  • Maxim

    What is the parameter “Length of the connecting strip, L3 (m)” is the part that connects the vertical grounding conductors? or the part that goes from the circuit to the installation? and why, when calculating, in the item “Horizontal earthing switch length” another figure is shown? not as in the clause “The length of the connecting strip, L3 (m)” based on what it is considered to be clause this clause

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