PVC insulated earthing/grounding copper cables are specialized wires designed for grounding and earthing systems in electrical setups. Their core function is to reliably connect metal enclosures of electrical equipment, line structures, etc., to the ground, forming a safe loop to discharge fault currents, prevent electric shock accidents, and stabilize system voltage. This series of cables offers five cross-sectional area specifications: 70mm², 50mm², 35mm², 25mm², and 16mm², all using stranded copper conductors, suitable for electrical systems of different power levels.​ In terms of conductor characteristics, the stranded copper material is a significant advantage. Copper, as a high-conductivity metal, can quickly conduct fault currents, ensuring the timeliness of grounding response. The stranded structure enhances the cable's flexibility, making it easy to bend, lay, and fix in complex wiring environments (such as building wall interlayers and narrow spaces at the bottom of equipment), reducing construction difficulty. The different cross-sectional area designs correspond to diverse application scenarios: 16mm² and 25mm² are suitable for low-power grounding systems such as small industrial equipment and household distribution boxes; 35mm² and 50mm² can meet the grounding needs of medium-sized production lines and commercial buildings; 70mm² is applicable to high-power scenarios like large substations and high-voltage transmission lines, ensuring stable performance even under high current impact.​ The insulation layer is made of polyvinyl chloride (PVC) material, which has multiple practical properties. The PVC insulation layer not only has high insulation resistance, effectively isolating the conductor from the external environment and preventing leakage risks, but also has good corrosion resistance, which can resist acid-base substances in the soil, moisture in the air, and slight chemical erosion, extending the service life of the cable. In addition, PVC material has moderate cost and mature processing technology, making the cable have high cost performance while ensuring performance, suitable for large-scale promotion and application.​ In terms of safety performance, this series of cables strictly complies with international standards for grounding systems (such as IEC, GB, etc.) and has passed multiple tests including insulation strength, aging resistance, and flame retardancy. The low impedance characteristic of its grounding loop can quickly conduct fault currents into the ground, avoiding electrification of equipment enclosures; at the same time, the self-extinguishing property of the PVC insulation layer can delay combustion in case of open fire, reducing the risk of fire spread.​ In terms of installation, the outer PVC sheath of the cable is smooth and wear-resistant, facilitating installation through pipes, burial, or open laying, and is suitable for various environments such as soil, concrete, and air. Cables of different specifications can be flexibly combined through terminals, connectors, and other accessories to meet the topological requirements of different grounding networks. Whether it is an independent grounding, shared grounding, or combined grounding system, it can provide reliable connection support.​ In summary, with multi-specification adaptability, high-conductivity stranded copper conductors, durable PVC insulation layers, and excellent safety performance, PVC insulated earthing/grounding copper cables have become an ideal choice for grounding systems in industrial, construction, power, and other fields, providing solid protection for the safe operation of electrical equipment and personnel protection.