The 450/750V 150mm² yellow-green earth cable is a dedicated grounding cable compliant with IEC 60245 standards. It features a Class 2 stranded copper conductor and a polyvinyl chloride (PVC) insulation layer, designed specifically for safe grounding in low-voltage electrical systems. Its core function is to quickly conduct fault currents to the ground in the event of electric leakage, short circuits, or equipment failures, preventing electric shock to personnel and damage to devices, thus serving as a key component in ensuring the safe operation of power systems.​ In terms of specifications, the conductor cross-sectional area of this earth cable is 150mm², making it a large-section cable capable of carrying huge fault currents, meeting the grounding needs of large industrial equipment, high-voltage distribution systems, and other scenarios. The conductor adopts a Class 2 stranded structure (in accordance with IEC 60228 standards), composed of multiple strands of relatively thick copper wires twisted together. This structure not only retains a certain degree of flexibility, facilitating laying in complex environments, but also has high mechanical strength, able to withstand stretching and impact during installation and use. The conductor is made of high-purity electrolytic copper with a purity of over 99.95%, which has excellent conductivity, effectively reducing grounding resistance and ensuring the rapid dissipation of fault currents.​ The insulation layer is made of polyvinyl chloride (PVC) material, which not only has good electrical insulation performance, withstanding the rated voltage of 450/750V (450V is the phase-to-earth voltage and 750V is the phase-to-phase voltage), but also has excellent wear resistance and chemical corrosion resistance, capable of resisting erosion from environmental factors such as oil stains, dust, and moisture. The insulation layer adopts the internationally recognized yellow-green color combination, a global standard for earth cables. This eye-catching color combination enables quick identification of its function, avoiding misconnection and ensuring the correctness and safety of the grounding system.​ In terms of performance, this earth cable exhibits excellent characteristics. Its long-term operating temperature range is -15℃ to 70℃, adapting to most indoor and outdoor environments; the short-term overload temperature can reach 105℃, maintaining structural stability when fault currents pass through instantly. The flame-retardant performance of the PVC insulation layer meets relevant standards, which can slow down the burning speed and reduce the risk of fire spread in case of fire. In addition, the cable has high insulation resistance (≥100MΩ·km) and small leakage current, which can effectively prevent electric leakage accidents. Its bending radius is small, 12 times the outer diameter for fixed laying and 15 times the outer diameter for flexible laying, facilitating installation in narrow spaces.​ The application scenarios are extensive and critical, mainly including: grounding of heavy machinery and equipment in large industrial plants, such as production line equipment in metallurgy, chemical industry, machinery manufacturing and other industries, which can quickly conduct large currents generated during equipment failures; grounding main lines of high-voltage distribution systems, connecting key equipment such as distribution cabinets, transformers, and lightning arresters to grounding electrodes, ensuring the stable operation of the distribution system; total grounding loops of commercial buildings and data centers, providing a unified grounding reference point for the electrical systems of the entire building, reducing electrical interference; equipment grounding in new energy fields such as photovoltaic power stations and wind farms, ensuring the safe operation of renewable energy systems; grounding networks of large infrastructure such as railways and airports, ensuring the power safety and personnel safety of transportation hubs.​ In terms of production process, the manufacturing process of the cable strictly follows IEC 60245 standards, with precise control from copper purification, strand stranding to PVC insulation extrusion. The stranding process adopts concentric stranding technology to ensure uniform distribution of multiple copper strands, reducing the skin effect during current transmission; during the insulation extrusion process, by precisely controlling temperature and pressure, the PVC material is tightly attached to the conductor surface, preventing moisture intrusion and insulation layer detachment, ensuring long-term reliability of the cable.​ In terms of installation and maintenance, due to the characteristics of the Class 2 stranded conductor, the earth cable can be laid in various ways such as open laying, concealed laying, and pipe threading. During installation, excessive bending and stretching should be avoided to prevent conductor damage. Special grounding terminals must be used for terminal connection to ensure firm connection and good conductivity. In daily maintenance, regular inspections should be carried out to check whether the insulation layer is aged, cracked, or worn, and whether the conductor is oxidized or loose, ensuring that the grounding loop is always unobstructed and the grounding resistance meets relevant standards (usually required to be less than 4Ω).​ To sum up, the 450/750V 150mm² yellow-green earth cable, with its large cross-sectional area, high flexibility, reliable insulation, and clear identification, has become an indispensable safety component in large electrical systems. It provides stable and efficient grounding solutions for various high-power, high-risk power scenarios and is an irreplaceable key link in the electrical safety system.