The green-yellow PVC insulated stranded copper earth cable, available in specifications of 10mm², 25mm², and 35mm², is a key safety component specifically designed for protective earthing in electrical installations. Its core function is to quickly conduct fault currents into the ground when electrical equipment malfunctions such as leakage or short circuits, preventing electric shock to humans when touching live equipment enclosures and avoiding damage to equipment due to overcurrent. It serves as an important line of defense to ensure the safe operation of electrical systems.​ In terms of product structure, the conductors of this series of cables are made of multi-strand stranded copper wires. The stranded design endows the cable with excellent flexibility, making it easy to bend and lay in complex electrical installation environments, especially suitable for scenarios that require passing through narrow pipes, walls, or equipment gaps, reducing damage to the conductor during installation. As a conductor material, copper has extremely high electrical conductivity, which can quickly conduct fault currents and ensure the low-resistance characteristic of the grounding circuit, which is crucial for the rapid dissipation of fault currents. The differences in cross-sectional areas of 10mm², 25mm², and 35mm² allow them to adapt to electrical equipment of different power levels: 10mm² is suitable for low-power scenarios such as small household appliances and office equipment; 25mm² can meet the grounding needs of medium-sized equipment such as air conditioners and elevators in commercial places; 35mm² is mostly used for protective earthing of large machinery, distribution cabinets, and other high-power equipment in industrial workshops.​ The insulation layer is made of polyvinyl chloride (PVC) material, and the outer layer adopts the internationally general green-yellow color identification. This color combination is a dedicated label for protective earthing, which can intuitively distinguish it from cables with other functions, avoid misconnection, and improve the safety of construction and maintenance. The PVC insulation layer not only has good insulation performance, which can prevent the risk of electric leakage caused by accidental contact between the grounding cable and other conductors, but also has certain corrosion resistance, weather resistance, and mechanical strength, which can adapt to various indoor and outdoor environments, such as humid basements and dusty workshops, extending the service life of the cable.​ The safety performance of this series of cables has been strictly controlled. The stranding process of the conductor ensures good conductivity and mechanical stability, and can maintain a stable grounding effect even in long-term use or slightly vibrating environments. The thickness of the insulation layer meets relevant standards, which can effectively resist external friction, extrusion, and other external forces, avoiding grounding failure caused by insulation layer damage. In addition, the green-yellow insulation material usually has certain flame-retardant properties, which can delay combustion in case of fire, buying time for fault handling and personnel evacuation.​ In application scenarios, this grounding cable has strong versatility. In civil buildings, it can be used for grounding of household distribution boxes, air conditioner outdoor units, electric water heaters and other equipment; in commercial buildings, it is suitable for high-voltage wells in office buildings, large refrigeration equipment in shopping malls, elevator systems in hotels, etc.; in the industrial field, it is an indispensable grounding component for production line equipment, transformers, high-voltage distribution cabinets, etc. Cables of different specifications can accurately match the grounding needs of various equipment through reasonable selection, ensuring that the safety protection of the entire electrical system is comprehensive.​ To sum up, the green-yellow PVC insulated stranded copper earth cable (10mm², 25mm², 35mm²) has become an ideal choice for protective earthing in electrical installations due to its clear identification, excellent conductivity, reliable insulation protection, and diverse specification options, providing a solid guarantee for the safety of various electrical equipment and personnel.