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.

The 450/750V 120mm², 150mm², and 240mm² green/yellow earth cables are a series of dedicated grounding cables that comply with international standards. They all adopt high-quality stranded copper conductors and polyvinyl chloride (PVC) insulation layers, designed for safe grounding in low-voltage electrical systems of different scales. Their core function is consistent: in the event of electric leakage, short circuits, or equipment failures in the circuit, they quickly conduct fault currents to the ground, preventing electric shock to personnel and damage to equipment, and serving as core components to ensure the safe operation of power systems.​ In terms of specifications, the main difference between these three cables lies in the conductor cross-sectional area, which are 120mm², 150mm², and 240mm² respectively, to meet the grounding needs of different current loads. All three use stranded copper conductors (usually Class 2 or Class 5 structures, in accordance with IEC 60228 standards), which are made by stranding multiple copper wires, combining flexibility and mechanical strength. The 120mm² cable is suitable for grounding of medium-sized industrial equipment and commercial buildings; the 150mm² is applicable to large industrial machinery and high-voltage distribution systems; the 240mm² is aimed at scenarios that need to carry huge fault currents, such as super-high-power equipment and large substations. The conductor material is high-purity electrolytic copper (purity ≥99.95%), with excellent conductivity, which can effectively reduce grounding resistance and ensure the rapid dissipation of fault currents.​ The insulation layers are all made of polyvinyl chloride (PVC) material, which has good electrical insulation performance and can withstand the rated voltage of 450/750V (450V is phase-to-earth voltage, 750V is phase-to-phase voltage). The PVC insulation layer also has excellent wear resistance, chemical corrosion resistance, and moisture resistance, which can resist erosion from environmental factors such as oil stains, dust, and moisture. The insulation layers of the three cables all adopt the internationally 通用 green-yellow color identification, and the color distribution complies with IEC 60446 standards (each color accounts for 30%-70%). The eye-catching identification can quickly identify its grounding function, avoid misconnection, and ensure the correctness of the grounding system.​ In terms of performance, the three earth cables perform excellently and consistently. The long-term operating temperature range is -15℃ to 70℃, which can adapt to most indoor and outdoor environments; the short-term overload temperature can reach 105℃, which can maintain structural stability when fault currents pass through instantly. The flame retardancy of the PVC insulation layer meets relevant standards (such as IEC 60332-1-2), which can delay combustion and reduce the risk of fire spread in case of fire. The insulation resistance is all ≥100MΩ·km, and the leakage current is small, effectively preventing electric leakage accidents. The bending radius varies slightly according to specifications, usually 12 times the outer diameter for fixed laying and 15 times the outer diameter for flexible laying, which is convenient for installation in narrow spaces.​ Application scenarios differ according to specifications: the 120mm² cable is often used in the total grounding loop of commercial buildings, grounding of medium-sized industrial equipment (such as injection molding machines, CNC machine tools), and grounding of server rooms in data centers; the 150mm² is suitable for heavy machinery in large industrial plants (such as metallurgical blast furnaces, chemical reactors) and grounding main lines of high-voltage distribution systems; the 240mm² is mainly used in grounding networks of super-high-power systems such as large substations, thermal power plants, wind farms, and grounding of traction substations in urban rail transit. Together, the three cover the full range of grounding needs from commercial to industrial, from small and medium power to super-high power.​ In terms of production process, all three cables strictly follow international 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 copper wires and reduce the skin effect during current transmission; during insulation extrusion, 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.​ In terms of installation and maintenance, the operation specifications of the three earth cables are similar. Due to the use of stranded conductors, they can be laid in various ways such as open laying, concealed laying, and pipe threading. During installation, excessive bending and stretching should be avoided. Special grounding terminals (select appropriate models according to specifications) 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 unobstructed and the grounding resistance meets the standard (usually required to be <4Ω).​ To sum up, the 450/750V 120mm², 150mm², and 240mm² green/yellow earth cable series, with their different conductor cross-sectional areas, reliable performance, clear identification, and wide applicability, provide comprehensive grounding solutions from small and medium to super-high power for various electrical systems, and are indispensable key components in the electrical safety system.

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.

This 95mm² green/yellow earth cable is a high-performance cable specially designed for the safety grounding of electrical systems. It has excellent conductivity, heat resistance and durable structure, and is widely used in grounding protection systems in various scenarios such as industrial, commercial and civil buildings.​ In terms of core structure, the cable uses stranded copper conductor as the conductive core. The cross-sectional area of 95mm² ensures that it has a strong current-carrying capacity, which can efficiently conduct fault current and quickly introduce leakage or short-circuit current into the ground, thereby ensuring the safety of electrical equipment and personnel. The application of the stranded technology not only enhances the flexibility of the conductor, making it easy to bend and lay in complex environments, but also improves the mechanical strength of the conductor, reducing the risk of fracture caused by external pulling or vibration, and prolonging the service life of the cable.​ The insulation layer of the cable is made of PVC material resistant to 90°C high temperature. This characteristic enables it to maintain stable insulation performance in higher temperature environments, effectively resisting the aging effect of temperature changes on the insulation layer and reducing the hidden danger of electric leakage. At the same time, the PVC insulation layer also has good chemical corrosion resistance, weather resistance and wear resistance, which can adapt to different working environments such as humidity, dust and slight chemical erosion, providing a reliable protective barrier for the conductor.​ The green and yellow outer layer design is a significant identifier of this earth cable, which conforms to the international general color standard for earth cables. It can be intuitively distinguished from cables with other functions, facilitating installers to quickly identify and operate, reducing the risk of misconnection, and improving construction efficiency and safety. This color identification not only plays an important role in the installation stage, but also helps staff quickly locate the grounding system during later maintenance and repair, improving the convenience of maintenance work.​ In terms of application scenarios, this cable is suitable for grounding systems in various industrial plants, commercial complexes, high-rise buildings, power facilities and other places. In industrial environments, its excellent temperature resistance and mechanical strength can adapt to the high temperature and vibration generated by equipment operation; in commercial and civil buildings, the reliable insulation performance and clear identification can ensure the safety and stability of the grounding system, providing a safe electricity environment for residents and users.​ In addition, the cable is produced in strict accordance with relevant industry standards and quality specifications to ensure that each section of the cable has consistent performance and reliability. Corresponding measures are taken both in the quality inspection before leaving the factory and in the transportation and storage process to avoid damage to the cable, ensuring that it can perform at its best during installation and use.​ To sum up, the 95mm² green/yellow earth cable (stranded copper, 90°C PVC insulated) has become a safe, reliable and practical choice in electrical grounding systems due to its reasonable structural design, excellent performance characteristics and clear identification, which can effectively ensure the electricity safety in various places.

The green-yellow single core earth cable (10-35mm²) is an international standard-compliant flexible grounding cable, featuring multi-stranded copper core (IEC 60228 Class 5) and a green-yellow Two-color insulation layer. It is compatible with H05V-K/H07V-K models, with a rated voltage of 300-750V, and is widely used in safety grounding systems of building electrical, industrial equipment, new energy facilities and other scenarios, providing a reliable path for fault current 导出 of electrical equipment and personnel.​ This series of cables covers four common specifications: 10mm², 16mm², 25mm², and 35mm². The conductors are all stranded by ultra-fine copper wires: 10mm² contains 34 strands of 0.6mm copper wires, 16mm² contains 49 strands of 0.64mm copper wires, 25mm² contains 60 strands of 0.73mm copper wires, and 35mm² contains 70 strands of 0.8mm copper wires. The multi-stranded fine copper wire stranded structure endows the cable with excellent flexibility (minimum bending radius is 6 times the outer diameter), which can easily pass through narrow spaces such as equipment gaps and bridge corners, especially suitable for grounding wiring in complex environments such as automated production lines and switch cabinets. The conductor purity is over 99.95%, and the conductivity is ≥100% IACS. At 30℃, the current-carrying capacity of 10mm² is 85A, and that of 35mm² is 135A, which can quickly conduct fault current into the ground, reducing the risk of electrification of the equipment shell.​ The insulation layer is made of polyvinyl chloride (PVC) materials with different temperature resistance levels: H05V-K type is resistant to -25℃ to 70℃, H07V-K type is resistant to -25℃ to 90℃, and the insulation thickness increases with the specification (10mm² is 0.8mm, 35mm² is 1.2mm). The volume resistivity of the insulation layer is ≥1×10¹⁴Ω・cm, and it passes the 2500V/5min voltage withstand test without breakdown, effectively blocking current leakage. The green-yellow two-color insulation strictly follows the international grounding identification standards, which can be quickly distinguished from phase wires and neutral wires, avoiding misconnection during construction. At the same time, the insulation material has oil resistance and weather resistance, which can resist industrial oil pollution, ultraviolet rays and humid environment erosion. The flame retardant performance reaches UL 94 V-2 level, and the self-extinguishing speed after encountering an open flame is ≤60 seconds, reducing the risk of fire spread.​ The stranded structure conforming to IEC 60228 Class 5 standard enables the cable to have both flexibility and mechanical strength, with a tensile strength of ≥12MPa and an elongation at break of ≥150%, which can withstand frequent bending and vibration (in line with IEC 60228 vibration test standards). The difference between H05V-K and H07V-K models lies in the temperature resistance range: H05V-K is suitable for normal temperature environments (such as commercial buildings), and H07V-K is suitable for high-temperature scenarios (such as boiler rooms, photovoltaic inverter cabins).​ In practical applications, 10-16mm² specifications are often used for residential distribution boxes and small motor grounding; 25-35mm² are suitable for high-power equipment such as large transformers, wind turbine towers, and charging pile groups. In new energy vehicle charging stations, 35mm² cables can connect the metal shell of the charging pile to the grounding grid to ensure that leakage current is quickly export during charging; in data centers, 16mm² cables are used to connect server cabinets to grounding busbars to ensure the safe operation of IT equipment.​ The production process follows the ISO 9001 quality management system throughout. From copper wire drawing, stranding to insulation extrusion, all are automated. Each batch of products passes more than 20 tests such as conductor resistance, insulation resistance, and aging resistance, with CE certification and factory reports, ensuring compliance with EU and domestic grounding system specifications. As a core component of electrical safety, this series of cables has become the preferred solution for various grounding projects due to its precise specification adaptation, reliable performance and clear identification.

The H07V-K 35mm² and 25mm² green-yellow earth cables are key cables specially designed for the safe grounding of electrical systems. With their reliable conductive performance, clear identification, and stable mechanical properties, they play an irreplaceable role in the grounding circuits of various industrial, commercial, and civil buildings.​ In terms of specification parameters, both cables adopt a multi-strand copper stranded structure, complying with the H07V-K model standard. The 25mm² cable conductor is composed of multiple strands of fine copper wires with a diameter of approximately 0.25mm, with a total number of strands exceeding 400. The overall conductor diameter is about 6.5mm, and the DC resistance at 20°C is not greater than 0.727Ω/km, which can quickly conduct fault current into the ground. The 35mm² cable has a single copper wire diameter of about 0.28mm, with more than 560 strands, a conductor diameter of about 8mm, and a DC resistance of no more than 0.524Ω/km, suitable for grounding requirements with larger currents. Both cables have a rated voltage of 450/750V, meeting the voltage requirements of grounding circuits in low-voltage electrical systems, and can work stably in AC 50Hz or 60Hz circuits.​ The insulation layer is made of high-quality PVC material. The insulation thickness of the 25mm² cable is about 1.2mm, and that of the 35mm² is about 1.4mm. Both have excellent insulation performance, with a dielectric strength exceeding 20kV/mm, and an insulation resistance of not less than 100MΩ·km at 20°C, effectively avoiding the risk of leakage between the grounding circuit and other live parts. The long-term operating temperature range of the cables is -15°C to 70°C, and they can withstand high temperatures of 90°C for a short time, adapting to temperature fluctuations in different environments. In addition, the minimum bending radius of both cables is 4 times the outer diameter of the cable. The static bending radius of the 25mm² cable is not less than 26mm, and that of the 35mm² is not less than 32mm, facilitating laying in complex electrical cabinets or wall interlayers.​ In terms of characteristic uses, the eye-catching green-yellow color identification is its most prominent feature. This internationally accepted standard color for grounding can quickly distinguish the grounding circuit, avoid misconnection, and ensure the accuracy of the grounding system. The 25mm² cable is often used for grounding of small and medium-sized electrical equipment, such as motors in industrial production lines, control cabinets, and distribution boxes in commercial buildings. It can connect the metal 外壳 of equipment to the grounding electrode, and when the equipment leaks, it can quickly conduct the current into the ground, protecting personnel and equipment safety. The 35mm² cable is suitable for the main grounding circuits of large electrical systems, such as transformer grounding in factories, high-voltage switchgear grounding, and main grounding trunks in large buildings. It can carry larger fault currents and ensure the grounding reliability of the entire electrical system.​ In the construction field, both cables are widely used in lightning protection grounding, protective grounding, and working grounding of new buildings. For example, in commercial complexes, 25mm² cables can be used for connecting local grounding grids in each floor's distribution room, while 35mm² cables serve as the main grounding trunks of the building, connecting the grounding grids of each floor to outdoor grounding electrodes to form a complete grounding system, effectively resisting safety hazards caused by lightning strikes and equipment leakage. In industrial plants, they are often used for grounding metal frames, pipes, and metal components of production line equipment to prevent static accumulation and leakage accidents.​ In terms of materials and performance, the conductor is made of high-purity electrolytic copper with a purity of more than 99.95%, ensuring excellent conductivity, reducing grounding resistance, and improving the conduction efficiency of fault current. The stranding process of the copper stranded wire has been optimized, giving the cable good flexibility, which can withstand multiple bendings and vibrations without breaking easily, meeting the installation requirements in complex environments. The PVC insulation layer not only has reliable insulation performance but also has oil resistance, wear resistance, and certain flame retardancy. When in contact with industrial oils such as engine oil and diesel, the volume change rate within 24 hours does not exceed 5%, and the wear amount after the wear test (load 500g, 1000 revolutions) is less than 8mg, prolonging the service life of the cable.​ In addition, the green-yellow color identification of the cable uses special temperature-resistant ink, which is integrally formed with the insulation layer through an extrusion process. The color is uniform and not easy to fade, and can still be clearly identified even in long-term use or harsh environments, complying with the grounding identification standards of the International Electrotechnical Commission (IEC). Both cables have passed strict quality inspections, including voltage withstand test (withstanding 2500V voltage for 1 minute without breakdown), tensile test (tensile strength not less than 12MPa), and bending test (no cracks after 1000 bendings), ensuring safety and reliability under various working conditions.​ In conclusion, the H07V-K 35mm² and 25mm² green-yellow earth cables, with their precise specification design, clear identification, and stable performance, provide a solid guarantee for the safe grounding of electrical systems, and are ideal choices for various low-voltage electrical equipment and building grounding projects.

The PVC insulated electrical wire introduced in this article is a grounding cable specially designed for house wiring. Its cross-sectional specifications range from 1.5mm² to 6mm², with green and yellow two-color as the grounding identifier, a rated voltage of 450/750V, and fully complies with the IEC 60227 standard, providing reliable grounding protection for household electrical safety.​ In terms of specification parameters, the cross-sectional range of 1.5mm² to 6mm² accurately matches the grounding needs of house wiring. The 1.5mm² wire is suitable for grounding small household appliances, such as table lamps and microwave ovens. These devices have low power and relatively low requirements for the conductivity of the grounding cable; the 2.5mm² wire can be used for grounding medium-power household appliances such as air conditioners and washing machines, which can stably carry the leakage current that may be generated during the operation of the equipment; the 4mm² and 6mm² wires are suitable for the main grounding lines of residential buildings or the grounding of high-power electrical appliances, such as electric water heaters and central air conditioners. They ensure that in case of sudden failures, large currents can be quickly conducted into the ground to avoid safety accidents. The design of rated voltage 450/750V is highly consistent with the voltage standard of the residential low-voltage distribution system, and can be directly compatible with distribution devices, sockets, etc. in the household circuit without additional voltage adaptation, simplifying the construction process of house wiring.​ In terms of material and design, the conductor of the wire is made of high-purity copper, which has excellent conductivity and can quickly conduct leakage current or static electricity into the ground to ensure electrical safety. High-purity copper not only has high conductivity, but also has good ductility and corrosion resistance. It can maintain stable performance for a long time in humid residential environments (such as kitchens and bathrooms), reducing the risk of grounding failure caused by conductor aging. The outer PVC insulation layer provides reliable electrical insulation protection. It has excellent insulation performance, which can effectively block current leakage and prevent short circuits between the grounding line and other phase lines and neutral lines. At the same time, PVC material is wear-resistant and anti-aging, which can resist friction, extrusion and other physical effects during house wiring, and prolong the service life of the wire. The green and yellow wire design is an internationally accepted grounding mark. In the complex wiring environment of residential buildings, it allows construction personnel to quickly identify the grounding cable, avoid wrong connection, and ensure the correct connection of the grounding system.​ The wire is produced in strict accordance with the IEC 60227 standard, which clearly stipulates the conductor material, insulation layer thickness, voltage resistance performance, mechanical strength, etc. of the wire, ensuring the quality stability and safety of the product. The characteristic of conforming to international standards makes the wire widely applicable in house wiring. Whether it is the circuit laying of new residential buildings or the transformation of grounding systems in old residential buildings, it can meet the specification requirements.​ In application scenarios, this wire is the core component of the residential grounding system. In the grounding main line of the household distribution box, it can connect the grounding lines of the entire residence into a whole to form a unified grounding network; in the socket circuits of each room, it forms a complete circuit together with phase lines and neutral lines. When an electrical appliance leaks, the leakage current is quickly conducted into the ground through the grounding cable, triggering the leakage protector to act and cut off the power supply, protecting personal safety. In addition, it can also play an important role in the lightning protection grounding branch of residential buildings, conducting the current generated by lightning induction into the grounding body, reducing the damage of lightning to household appliances.​ In general, this PVC insulated green and yellow two-color grounding cable, with its precise specification design, high-quality material selection, international standard-compliant quality and clear positioning in house wiring, has become an important guarantee for household electrical safety, providing a safe, stable and compliant solution for residential grounding systems.

The green-yellow grounding wire (also known as earth cable) is a professional-grade product focused on electrical safety protection, covering a full range of specifications from 10mm² to 70mm². Its core advantage lies in excellent heat and moisture resistance, making it widely applicable to various power systems, industrial equipment, and building facilities that require stable grounding.​ In terms of specification design, the grounding wire includes multiple models such as 10mm², 16mm², 25mm², 35mm², 50mm², and 70mm², which can accurately match different current load requirements. The 10-25mm² specifications are suitable for grounding protection of household circuits, small distribution boxes, and weak current equipment, such as smart home systems and security equipment; the 35-50mm² specifications are adapted to the grounding loops of medium-sized industrial machinery and commercial building power distribution trunk lines; the 70mm² specification is aimed at high-voltage equipment, large factories, and outdoor power facilities, which can effectively divert short-circuit current or lightning pulse, providing safety protection for high-power scenarios.​ Materials and craftsmanship are the core supports for its performance. The conductor is made of high-purity electrolytic copper, manufactured through multi-strand precision stranding technology, with a conductivity of over 98%, ensuring efficient and low-loss current conduction. The outer insulating sheath is made of special PVC composite material with heat and moisture resistance, which can withstand extreme temperature changes from -40℃ to 105℃. It can still maintain stable insulation performance in humid, rainy, or high-temperature environments (such as basements, kitchens, and outdoor distribution boxes), with an insulation resistance of ≥1000MΩ. It also has ultraviolet resistance and acid-alkali corrosion resistance, with a service life much longer than ordinary grounding wires.​ The product strictly complies with the International Electrotechnical Commission (IEC) grounding standards and GB 50169 standards. The green-yellow color identification meets the globally recognized grounding safety certification, facilitating quick identification and standardized wiring. Its structural design takes into account both flexibility and mechanical strength. The diameter of a single copper wire is controlled at 0.12-0.28mm, and the overall bending radius is ≥6 times the cable diameter, which can easily pass through narrow pipes or complex wiring environments. At the same time, the tensile strength is ≥15MPa, which can withstand mechanical stress during laying.​ In addition, the grounding wire has passed a number of rigorous tests: after working continuously at 105℃ for 72 hours, the insulation performance does not significantly decay; after the 95% humidity environment aging test, the conductor corrosion rate is less than 0.01mm/year, ensuring long-term reliability in humid environments such as bathrooms, swimming pools, and chemical workshops. Whether as equipment protective grounding, lightning protection grounding, or anti-static grounding, this green-yellow grounding wire can build a solid safety barrier for the electrical system with its full specification adaptability and environmental tolerance.

Twin and Earth Cable LSZH Flat TPS 2X2.5+E2.5mm² is a flat-type cable designed specifically for indoor electrical wiring, featuring safety, environmental friendliness, and practicality. It is widely used in lighting and power distribution systems of residential buildings, commercial buildings, and public facilities.​ The cable adopts a core structure of "two live wires and one earth wire": 2 phase wires (live wires) of 2.5mm² and 1 earth wire (E wire) of 2.5mm² are arranged in parallel, wrapped in an LSZH (Low Smoke Zero Halogen) insulating sheath, and the whole is flat (TPS design). This structure not only saves installation space, facilitating laying in narrow environments such as wall trunking and floor interlayers, but also reduces the risk of wiring misoperation through clear distinction of core functions (usually phase wires are brown/blue, and earth wire is yellow-green 双色).​ In terms of materials, the conductor is made of high-purity electrolytic copper, which has excellent conductivity, ensuring stable current transmission and reducing line loss; the insulation layer and sheath are made of LSZH materials, which have significant environmental advantages - in high temperature or combustion situations, they will not release toxic halogen gases and a large amount of smoke, which can effectively delay the spread of fire, gain time for personnel evacuation and equipment protection, and are especially suitable for places with strict fire safety requirements, such as hospitals, schools, high-rise buildings, etc. At the same time, LSZH materials have excellent aging resistance and UV resistance, and can adapt to long-term indoor dry or humid environments, with a service life of more than 15 years.​ As a flat TPS cable, its flexibility is better than traditional round cables, with a small bending radius, which can flexibly turn in complex wiring paths, reducing construction difficulty. In addition, the cable has passed strict mechanical performance tests, with strong tensile and wear resistance, and can withstand slight external impact during installation and use.​ In terms of electrical performance, the cable has a rated voltage of 450/750V, meeting the voltage requirements of household and small commercial equipment, with a continuous current-carrying capacity of up to 24A (at an ambient temperature of 30℃), suitable for air conditioners, refrigerators, washing machines and other common household appliances. The setting of the earth wire further strengthens safety protection, which can quickly conduct the leakage current of the equipment into the ground, avoiding electric shock accidents.​ The product is manufactured in strict accordance with international standards such as IEC 60228 and BS 6004, and has passed multiple tests such as insulation resistance, voltage resistance, and combustion performance to ensure the quality consistency of each meter of cable. Whether it is the circuit laying of new buildings or the upgrading of old lines, this cable can provide a reliable wiring solution for indoor electrical systems with its characteristics of safety, environmental protection, convenient installation and stable performance.

The family of flexible twin and earth electric wires—encompassing BV, BVR, BVV, BVVB, and RVV variants—represents a versatile, cost-effective solution for low-voltage (0.45/0.75kV) residential, commercial, and light industrial electrical systems. Characterized by low-copper-content PVC insulation (optimized for balance between conductivity and affordability), conductor cross-sections ranging from 1mm² to 10mm², and a sleek black finish, these wires are engineered to deliver reliable power transmission while prioritizing flexibility, safety, and easy installation. Designed around the "twin and earth" structure (two current-carrying conductors + one protective earth conductor), they comply with global standards such as IEC 60227 and GB/T 5023, making them suitable for applications from household wiring and appliance connections to office power distribution and small-scale industrial machinery. Core Variants: Design Differences and Functional Adaptability Each wire variant is tailored to specific installation needs, with structural distinctions that define their flexibility, durability, and use cases: 1. BV (Solid Copper Core, Single PVC Insulation) BV wires feature a single solid low-copper conductor (purity ≥99.5%, optimized for cost efficiency) with a thin black PVC insulation layer (0.6-1.0mm thickness). The solid core delivers stability for fixed, linear wiring (e.g., wall-mounted lighting circuits), with a minimum bending radius of 10× the wire’s outer diameter. Available in 1mm² (rated current 6A) to 10mm² (rated current 32A), BV wires excel in scenarios where rigidity simplifies threading through wall cavities or conduit. Their black insulation offers UV resistance (via 0.5% carbon black additive), making them suitable for covered outdoor applications like patio lighting. 2. BVR (Stranded Copper Core, Single PVC Insulation) BVR wires replace the solid core with stranded low-copper conductors (7-49 fine strands, depending on cross-section), enhancing flexibility for tight, curved routes (e.g., behind furniture or in narrow commercial spaces). The stranded design reduces conductor fatigue during repeated bending (up to 10,000 cycles at 6× the bending radius) and improves heat dissipation—critical for high-load circuits like office printer stations. Sizes range from 1.5mm² (rated current 10A) to 10mm² (rated current 35A), with the black PVC insulation maintaining the same flame-retardant properties (per IEC 60332-1) as BV variants. 3. BVV/BVVB (Sheathed Variants for Enhanced Protection) BVV (Solid Core, PVC Insulation + Outer Sheath): Adds a thick black PVC outer sheath (0.8-1.2mm) over the insulated conductors, boosting abrasion resistance for exposed wiring (e.g., under-office floors or industrial workbenches). The solid core ensures stable termination to sockets, with sizes from 2.5mm² (rated current 16A) to 10mm² (rated current 32A). BVVB (Flat Twin and Earth, PVC Sheath): Features a flat, compact design (two insulated conductors + one earth conductor embedded in a single black PVC sheath) ideal for narrow spaces like skirting boards or ceiling voids. The flat profile prevents rolling during installation, making it a top choice for residential renovation projects. Sizes start at 1.5mm² (rated current 10A) and extend to 6mm² (rated current 25A). 4. RVV (Flexible Stranded Core, Double PVC Sheath) RVV wires are the most flexible in the family, with highly stranded low-copper conductors (19-127 strands) and a double-layer black PVC sheath (inner insulation + outer protective layer). This design enables extreme flexibility (minimum bending radius 4× the outer diameter) for dynamic applications like portable appliances (e.g., vacuum cleaners, power tools) or temporary event wiring. Sizes range from 1mm² (rated current 5A) to 6mm² (rated current 20A), with the double sheath providing resistance to oil, water, and mild chemicals (per IEC 60811-2-3). Low-Copper PVC Insulation: Balance of Performance and Affordability The "low copper" designation refers to a optimized conductor composition (99.5% copper + 0.5% trace metals) that reduces material costs without compromising essential conductivity. This design delivers a conductivity of ≥50MS/m at 20°C—sufficient for low-voltage applications—while lowering upfront costs by 15-20% compared to high-purity copper wires. The black PVC insulation further enhances value by integrating multiple functional additives: Flame Retardants (30% calcium carbonate + antimony trioxide): Ensures self-extinguishing within 60 seconds (per IEC 60332-1), minimizing fire risks in enclosed spaces like apartments or offices. UV Stabilizers (0.5% carbon black): Prevents insulation degradation from sunlight exposure, extending service life to 10-15 years for covered outdoor use. Plasticizers (5% DINP): Maintains flexibility at temperatures as low as -15°C, avoiding brittleness in cold environments (e.g., unheated garages). Cross-Section Sizes: Matching Loads to Applications The 1mm²-10mm² size range is carefully calibrated to cover diverse low-voltage loads: 1mm²-1.5mm²: Ideal for low-current applications like household lighting (1mm²: 6A, 1.5mm²: 10A) or small appliances (e.g., phone chargers, desk lamps). BVR and RVV variants in these sizes are popular for DIY projects due to their flexibility. 2.5mm²-4mm²: The workhorse size for power sockets (2.5mm²: 16A) and medium-load appliances (e.g., refrigerators, microwaves, 4mm²: 25A). BVVB’s flat design is widely used in residential kitchen and living room wiring. 6mm²-10mm²: Reserved for high-load scenarios like electric water heaters (6mm²: 25A) or small industrial machinery (10mm²: 32A). BV and BVV variants in these sizes are preferred for fixed, heavy-duty circuits due to their solid core stability. Key Applications: Versatility Across Sectors These black twin and earth wires excel in three primary sectors, leveraging their flexibility and safety features: Residential Wiring Household Circuits: BV (1.5mm²) for lighting, BVVB (2.5mm²) for socket circuits, and RVV (1.5mm²) for portable appliances. The black finish blends with wall and ceiling surfaces, reducing the need for additional concealment. Renovations: BVR (2.5mm²) and BVVB (1.5mm²) adapt to existing wall cavities and narrow spaces, avoiding the need for extensive demolition. Their flame-retardant insulation meets strict residential fire codes (e.g., NFPA 70 in the US). Commercial Spaces Office Power Distribution: BVV (4mm²) for cubicle socket clusters, RVV (2.5mm²) for flexible connections to printers and projectors. The oil-resistant PVC withstands accidental spills in breakrooms. Retail Stores: BVVB (6mm²) for display lighting and POS systems, with the flat design fitting under floor tiles or behind display cases. Light Industry Small Factories: BV (10mm²) for machinery power, RVV (4mm²) for temporary equipment connections. The low-copper design reduces long-term operational costs for budget-conscious small businesses. Warehouses: BVR (6mm²) for lighting and forklift charging stations, with UV-resistant insulation suitable for high-ceiling, sunlit spaces. Competitive Advantages Compared to high-purity copper wires or non-flexible alternatives, these wires offer distinct benefits: Cost Efficiency: Low-copper PVC insulation cuts material costs by 15-20% without sacrificing performance, making them ideal for large-scale projects. Flexibility: BVR, BVVB, and RVV variants adapt to complex routes, reducing installation time by 30% compared to rigid wires. Safety Compliance: Flame-retardant PVC and twin-and-earth structure meet global safety standards, ensuring compliance with residential, commercial, and industrial codes. Aesthetic Appeal: The sleek black finish minimizes visual disruption, eliminating the need for paint or covers in visible installations. In summary, the flexible BV/BVR/BVV/BVVB/RVV twin and earth wires (1mm²-10mm², black low-copper PVC insulated) fill a critical niche in low-voltage electrical systems. By balancing flexibility, affordability, and safety, they cater to diverse needs—from household DIY projects to commercial power distribution—while adhering to strict global standards. Their modular design, range of sizes, and durable black insulation make them a reliable choice for modern electrical infrastructure.