Charcoal industrial salt can be added to the bottom of the pit and irrigated to meet the requirements. You can also use a few angle steels to drive them into the ground every few meters, and then weld them with flat steel to lead out the grounding wire.
When the current flows through the above three kinds of grounding electrodes, the potential of the grounding electrodes will rise, which will affect the safety of people and equipment. Therefore, it is necessary to limit the potential rise of grounding electrode or take corresponding safety measures to ensure the safety of equipment and personnel.
Extended data:
earthing resistance
The grounding resistance value is related to soil conductivity, the shape, size and arrangement of grounding body, current frequency and other factors. Generally, the shape, size, quantity and arrangement of grounding bodies should be determined according to the requirements of grounding resistance. For areas with high soil resistivity (such as mountainous areas), in order to save metal materials, measures can be taken to improve soil conductivity.
Fill the soil around the grounding body with high conductivity or cover the grounding body with a layer of resistance reducer (solidified resin containing water and strong medium) to reduce the grounding resistance.
When lightning current flows into the grounding body, the potential on the grounding body is very high because of the large amplitude of lightning current, which will produce strong spark discharge in the soil around the grounding body, and the soil conductivity will increase accordingly, which is equivalent to reducing the stray current resistance.
References:
Baidu encyclopedia-grounding gas