The 150mm² Class 5 flexible copper PVC insulated yellow/green earth wire (450/750V) is a specialized cable designed for the safety of electrical systems. Its core function is to safely conduct current to the ground in the event of electric leakage, short circuits, or equipment failures, preventing electric shock to personnel or damage to devices. It is a key component ensuring the safe operation of power systems.​ In terms of structure, this earth wire uses a Class 5 flexible copper conductor, which means the conductor is stranded with multiple fine copper wires, providing extremely high flexibility. The cross-sectional area of 150mm² endows it with strong current-carrying capacity, enabling it to quickly conduct fault currents, meeting the needs of high-current grounding scenarios such as large industrial equipment and high-voltage distribution systems. The high ductility of the flexible copper conductor allows it to be easily bent and laid in complex environments, maintaining good electrical connection even in narrow spaces or occasions requiring frequent movement.​ The insulation layer is made of polyvinyl chloride (PVC) material, which not only has excellent electrical insulation performance, withstanding the rated voltage of 450/750V, but also has good wear resistance and chemical corrosion resistance, capable of resisting erosion from environmental factors such as oil stains, dust, and moisture. More importantly, the insulation layer adopts the internationally recognized yellow-green 双色标识，a global standard for earth wires. This eye-catching color combination can quickly identify its function, avoiding misconnection and ensuring the correctness of the grounding system.​ In terms of performance, this earth wire performs outstandingly. 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 current passes through instantly. The flame-retardant property 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 low resistance characteristic of the flexible copper conductor (conductor resistance not exceeding 0.124Ω/km) ensures that the grounding resistance meets safety specifications, usually requiring the grounding resistance to be less than 4Ω, effectively guaranteeing the current leakage efficiency.​ 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; grounding main lines of high-voltage distribution systems, connecting key equipment such as distribution cabinets and transformers to grounding electrodes; total grounding loops of commercial buildings and data centers, providing a unified grounding reference for the electrical systems of the entire building; equipment grounding in new energy fields such as photovoltaic power stations and wind farms, ensuring the safe operation of renewable energy systems; and grounding networks of large infrastructure such as railways and airports, ensuring the power safety of transportation hubs.​ In terms of installation and maintenance, due to the high flexibility of Class 5 flexible copper, this earth wire can be laid in various ways such as open laying, concealed laying, and pipe threading. There is no need to worry too much about conductor breakage during installation. However, it should be noted to avoid direct contact with sharp objects to prevent damage to the insulation layer; 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 or cracked, and whether the conductor is oxidized or loose, ensuring that the grounding loop is always unobstructed.​ To sum up, the 150mm² Class 5 flexible copper PVC insulated yellow/green earth wire, 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.

The 35mm² green-yellow earth wire is a key cable specially designed for the safe grounding of electrical systems. It adopts a high-purity multi-strand stranded copper core and is covered with a green-yellow Two-color insulation layer. It combines excellent conductivity, flexibility and identification, and is widely used in the grounding loops of industrial plants, commercial buildings, power facilities and other scenarios, providing core protection for the safety of equipment and personnel.​ The conductor part is stranded by 70 strands of high-purity electrolytic copper wires with a diameter of 0.8mm, with a total cross-sectional area of 35mm² and a purity of more than 99.95%. The multi-strand stranded structure not only makes the cable have excellent flexibility, which can be easily bent into various angles (the minimum bending radius is 6 times the outer diameter of the cable), adapting to complex grounding wiring environments, but also increases the conductor surface area, improving heat dissipation performance and current conduction efficiency. At an ambient temperature of 30℃, its current-carrying capacity can reach 135A, which can quickly conduct fault current into the ground, effectively reducing the risk of electrification of the equipment shell, and meeting the grounding needs of high-power scenarios such as large industrial equipment and power distribution systems.​ The insulation layer is made of polyvinyl chloride (PVC) or cross-linked polyethylene (XLPE) material with a temperature resistance level of 105℃, and the thickness is uniform and not less than 1.2mm. This insulating material has excellent insulation performance (volume resistivity ≥1×10¹⁴Ω・cm), which can prevent the grounding loop from accidentally contacting other conductors. At the same time, it has aging resistance and chemical corrosion resistance, and can resist oil pollution, moisture and mild acid-base erosion in industrial environments. The insulation layer has passed strict voltage withstand tests (AC 2000V/5min without breakdown) to ensure safe use in complex environments. The green-yellow 双色 insulation layer design is its significant identifier, which conforms to the color standard of the dedicated grounding wire in international electrical specifications. It can be quickly distinguished from phase wires and neutral wires, avoiding the risk of misconnection during construction and improving the reliability of the grounding system.​ The mechanical properties of the earth wire are also excellent, with a tensile strength of ≥12MPa and an elongation at break of ≥150%. It can withstand stretching and friction during wiring, and is not prone to conductor breakage or insulation layer damage. Its flame retardant performance reaches UL 94 V-2 level, which can inhibit combustion and reduce smoke when exposed to open fire, reducing safety hazards in case of fire. In addition, the cable has passed multiple tests such as vibration resistance and damp heat resistance, maintaining stable performance in the temperature range of -40℃ to 105℃, with a service life of more than 15 years.​ In practical applications, the 35mm² green-yellow earth wire is mainly used in the following scenarios: grounding the shell of large motors and transformers in industrial plants, quickly conducting the leakage current generated during equipment failure into the ground; connecting the main grounding terminal box of commercial buildings with the grounding electrode, constructing the grounding main line of the entire building; wiring the grounding grid of power substations, forming an efficient fault current shunting network; safety grounding of new energy charging piles, ensuring the safety of personnel during charging. Its flexible characteristics make it particularly suitable for laying in equipment-intensive areas and narrow spaces, such as internal grounding of switch cabinets and grounding branches in cable trays, simplifying the construction process and improving the installation efficiency of the grounding system.​ The production process of the cable strictly follows standards such as GB 50169 and IEC 60445. From copper wire drawing, stranding to insulation extrusion, all realize automatic control. Each batch of products undergoes comprehensive tests such as conductor resistance, insulation resistance and temperature resistance, and is accompanied by a quality certificate to ensure that it meets the strict requirements of the grounding system. As the "lifeline" of electrical safety, the 35mm² green-yellow earth wire, with its excellent performance and clear identification, has become an indispensable safety guarantee component in various electrical systems.

The copper earth cable introduced in this article is a professional cable product specially designed for electrical grounding systems. Its cross-sectional specifications range from 2.5mm² to 50mm². It uses high-purity copper as the conductor, with a PVC insulation layer wrapped around the outside. The wire body is green and yellow, with a rated voltage of 450/750V. It is widely used in grounding devices of various buildings, industrial facilities and electrical equipment, providing key protection for electrical safety.​ In terms of conductor material, the selection of high-purity copper is the core advantage of this cable. Copper has excellent electrical conductivity, especially in grounding systems, which can quickly conduct fault current or static electricity into the earth, avoiding potential safety hazards caused by charge accumulation. At the same time, the copper conductor has good corrosion resistance and ductility. After special processing, it can maintain stable conductivity and structural integrity even in humid, dusty and other complex environments, prolonging the service life of the cable.​ In the design of the insulation layer, the application of PVC material provides reliable electrical insulation protection for the cable. The PVC insulation layer can not only effectively block current leakage, prevent interference between the grounding system and other circuits, but also has certain wear resistance and aging resistance, adapting to different installation environments. The green and yellow wire body design is an internationally accepted grounding mark, which can clearly distinguish the grounding cable from other wires, facilitating identification and installation by construction personnel and reducing the risk of misoperation.​ In terms of specifications, the cross-sectional range of 2.5mm² to 50mm² enables it to meet the grounding needs of different scenarios. The 2.5mm² small-section cable is suitable for light-load grounding systems such as small electrical equipment and household circuits; while the 50mm² large-section cable can be used in heavy-load grounding scenarios such as large industrial equipment, substations, and high-rise buildings. It ensures that in the event of a short circuit and other faults, large currents can be quickly conducted into the earth, protecting equipment and personnel safety.​ In the field of application, this copper earth cable has become an important part of the electrical grounding system due to its reliable performance. In the construction field, it is used for lightning protection grounding and protective grounding of buildings, conducting lightning current or equipment leakage into the earth to ensure the safety of buildings and internal facilities; in the industrial field, it is often used for grounding of factory production line equipment and large machinery to prevent accidents caused by equipment leakage; in the power system, places such as substations and distribution rooms are also inseparable from it, providing grounding guarantee for the stable operation of power equipment.​ The design of rated voltage 450/750V enables it to meet the grounding requirements of most low-voltage electrical systems, and is compatible with common electrical equipment and grounding devices, simplifying the design and installation process of the system. Whether it is the laying of grounding systems in new projects or the transformation and upgrading of old systems, this copper earth cable can provide a safe, stable and efficient grounding solution, and is a key component to ensure the safe operation of electrical systems.

PVC Insulation Copper Electrical Wiring Earth Wire Cable: Essential Safety for Electrical Systems​ This range of PVC-insulated copper earth wire cables, available in 2.0mm, 5.5mm, 8mm, and 50mm, serves as a critical safety backbone for electrical systems, designed to divert fault currents safely to the ground. Crafted with high-purity copper conductors, they ensure low resistance and efficient conductivity—vital for rapid dissipation of electrical surges, minimizing risks of electric shock, equipment damage, or fires.​ The PVC insulation layer, engineered for durability, offers robust protection against moisture, abrasion, and temperature extremes (-15°C to 70°C), making it suitable for both indoor and outdoor installations. Its flame-retardant properties add an extra safety barrier, slowing fire spread during electrical faults. The insulation also features clear color coding (typically green/yellow) for instant identification, complying with global safety standards (IEC, UL) to prevent misconnection.​ Each 规格 (specification) targets specific applications: 2.0mm for residential grounding (appliances, lighting); 5.5mm and 8mm for commercial use (distribution panels, HVAC systems); and 50mm for heavy-industrial settings (power plants, renewable energy facilities). All variants balance flexibility and strength, facilitating easy routing through conduits or tight spaces.​ Compliant with international codes, these earth wires deliver reliability across residential, commercial, and industrial projects. Their combination of high-conductivity copper, durable PVC, and tailored sizing makes them an indispensable choice for ensuring electrical system integrity and safety.

As a professional manufacturer of electrical safety cables, we are committed to providing high-performance 70mm² Electrical Earthing Cable—a critical component designed to safeguard electrical systems, equipment, and personnel by diverting fault currents to the earth. This cable stands out in industrial, commercial, and large-scale residential projects for its excellent current-carrying capacity, robust mechanical strength, and reliable conductivity, making it an indispensable choice for high-demand earthing applications.​ The 70mm² cross-sectional area is the core advantage of this earthing cable, enabling it to handle large fault currents (up to 2000A under short-circuit conditions) efficiently. Unlike smaller-gauge earthing cables (such as 25mm² or 50mm²), the 70mm² variant minimizes resistance during fault current diversion, ensuring rapid dissipation of dangerous currents to the ground—this is crucial for preventing electrical shocks, equipment damage, and fire hazards in high-power systems (e.g., industrial machinery, commercial building main switchboards, and renewable energy installations like solar farms).​ Constructed with high-purity stranded copper conductors (99.95% oxygen-free copper), the cable delivers exceptional conductivity and flexibility. The stranded design, composed of multiple thin copper strands twisted together, allows easy installation in tight spaces, around equipment corners, or across long distances without compromising conductor integrity—solving the rigidity issue of solid-core cables and adapting to complex on-site environments. The cable is also coated with a durable, corrosion-resistant PVC or XLPE (cross-linked polyethylene) insulation layer: PVC insulation offers excellent moisture resistance for indoor or mild outdoor use, while XLPE insulation provides enhanced high-temperature tolerance (up to 90°C continuous use) and UV resistance, making it suitable for harsh outdoor conditions like power transmission towers or outdoor substation earthing systems.​ Our 70mm² Electrical Earthing Cable complies with international standards such as IEC 60446 (for earthing conductors) and GB 50169 (China’s national standard for earthing engineering), undergoing strict quality testing including resistance measurement, tensile strength verification, and corrosion resistance assessment. These certifications ensure the cable meets the highest safety requirements for long-term, stable operation.​ As a customer-centric supplier, we offer flexible customization (e.g., adjusting cable length, choosing insulation materials based on application environments) and professional technical support—our team assists clients in calculating earthing system requirements, selecting matching accessories (like earthing clamps and lugs), and providing on-site installation guidance. Whether for new project construction, electrical system upgrades, or safety compliance renovations, our 70mm² Electrical Earthing Cable delivers the safety, reliability, and performance needed to protect electrical infrastructure.