Earth Mats are metal mats that are installing underground to form a very high quality ground frequently for really good lightning security, or for particularly high quality ground systems required for EMI testing.
It is typically needed to dig up the ground to a depth, the fill terrible on top of the mats. An array of ground rod motivated into the ground is an enhanced method.
The fabric is generally copper, but other materials can be used if the soil is highly acidic. The higher the conductivity of the material the better.
An earthing method has two objectives:
1. offer for a uniform potential grade over a physical area. This is required so that individuals who are walking in the area are not exposing to extreme voltages across the length of a stride step potential or when they feel a metallic structure reach potential
2. Offer a association to earth throughout which lightning or system responsibility current can be dissolute. In effect, this purpose amounts to managing the potential diverse relative to a remote area.
Earthing mat in general consist of a rectangular or square grid of copper wires that are hidden in underground trench. This grid be required to lie under the entire area to be secluded, & must expand beyond any safety fencing that may be there to stop interference by civilians. Calculations that take into account the resistivity of the soil & any surface action in the protected area to attain maximum step & reach potentials.
Earthing mats also may comprise driven copper rods at some or all of the grid intersection. The rods are more necessary to disperse current than to manage step & reach potentials.
In some instances, it is also essential to treat the soil surrounding the mesh with chemicals to improve soil conductivity. And it may be essential to install driven rods in bore holes that are back filled with particular chemicals.
In specially demanding applications for example, in areas where there is a lot of granite beneath the surface earth, it may be essential to complement the mesh with any esd bags that are sunk into nearby bodies of water, or by linking the mesh to water wells that are bored throughout the granite into conductive products.
It is typically needed to dig up the ground to a depth, the fill terrible on top of the mats. An array of ground rod motivated into the ground is an enhanced method.
The fabric is generally copper, but other materials can be used if the soil is highly acidic. The higher the conductivity of the material the better.
An earthing method has two objectives:
1. offer for a uniform potential grade over a physical area. This is required so that individuals who are walking in the area are not exposing to extreme voltages across the length of a stride step potential or when they feel a metallic structure reach potential
2. Offer a association to earth throughout which lightning or system responsibility current can be dissolute. In effect, this purpose amounts to managing the potential diverse relative to a remote area.
Earthing mat in general consist of a rectangular or square grid of copper wires that are hidden in underground trench. This grid be required to lie under the entire area to be secluded, & must expand beyond any safety fencing that may be there to stop interference by civilians. Calculations that take into account the resistivity of the soil & any surface action in the protected area to attain maximum step & reach potentials.
Earthing mats also may comprise driven copper rods at some or all of the grid intersection. The rods are more necessary to disperse current than to manage step & reach potentials.
In some instances, it is also essential to treat the soil surrounding the mesh with chemicals to improve soil conductivity. And it may be essential to install driven rods in bore holes that are back filled with particular chemicals.
In specially demanding applications for example, in areas where there is a lot of granite beneath the surface earth, it may be essential to complement the mesh with any esd bags that are sunk into nearby bodies of water, or by linking the mesh to water wells that are bored throughout the granite into conductive products.