Earthing calculations: Formula for cross section of earthing conductor, depth of burying the strip or bare earthing conductor, etc.

Question

Accepted Answer

The formula for cross section of earthing conductor and depth of burying the strip or bare earthing conductor.

The formula for cross section of earthing conductor is determined by the maximum fault current and the allowable touch voltage.
The depth of burying the strip or bare earthing conductor depends on factors such as soil resistivity and the type of installation.
The cross section of earthing conductor can be calculated using the formula: Cross Section = (Fault Current x Length) / (k x ∆V)
The depth of burying the strip or bare earthing conductor can be determined based on the soil resistivity and the required resistance to earth.
It is important to consider safety standards and regulations when performing earthing calculations.

Accepted Answer

current dissipated by one Earthing Pipe = Current Density x Surface area of electrode

Accepted Answer

System earthing involves the provision of a connection to the general mass of earth. This connection should have a resistance not greater than that required to operate safety mechanisms to isolate the electricity supply from a fault situation.

Second important characteristic of earthing connection is that .

The value of resistance required might not always be amenable to an automatically set value. Therefore, the various factors which affect the resistance to earth and fault current capacity of the buried conductor, designated the earth electrode, should be considered.

This should include the size and shape of the earth conductor, the resistivity of the soil in which it is buried and the connection of the system to it. It is also essential to consider the current density at the surface of the earth electrode and the ground potentials in its vicinity.

Earthing calculations: Formula for cross section of earthing conductor, depth of burying the strip or bare earthing conductor, etc.

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