Graphite earthing, as evident, can be widely applied in various fields such as power, telecommunications, railways, construction, mining, chemical industries, factories, and warehouses for their earthing, protective earthing, anti-interference earthing, lightning protection earthing, and static electricity prevention facilities. It effectively reduces the earthing resistance and ensures long-term stability of the earthing effect.
Graphite grounding, in rural power grids, how to connect a protective earth wire without one? This requires handling three different scenarios.
Newly constructed buildings, for those using reinforced concrete structures, should have 60mm x 60mm x 2500mm galvanized angle irons installed as grounding electrodes below the corner columns at the four corners of the house during foundation excavation. Then, use a welding machine to securely connect the four grounding electrodes to the main reinforcing steel. Also, leave a wire connection point at the entrance line for connecting the neutral wire for the power supply department and to lead out the grounding protection wire—PE wire. Ensure this grounding electrode is electrically connected to the three-phase four-wire neutral wire, and use copper-core wire with a minimum cross-sectional area of 10 square millimeters. Additionally, this grounding electrode can also serve as a comprehensive grounding electrode, and can be used for lightning protection grounding in buildings.
The soil around the house is dry and has a high resistivity.
If the new construction is not a house built from new or not of reinforced concrete structure, we can only install an artificial grounding electrode. If the soil around the house is relatively moist, drive 1-2 60mm x 60mm x 2500mm galvanized angle irons into the ground, and securely weld them together using galvanized round or flat steel bars, and make an electrical connection to the neutral wire of the three-phase four-wire system, leading to the protective earth wire—PE.