This copper ground wire, prominently marked with green and yellow two-color，offers three core specifications of 25mm², 50mm², and 95mm². It is specifically designed for lightning protection and fault protection in power systems, belonging to industrial - grade professional equipment. Its core advantage stems from the use of high - purity electrolytic copper, which not only has excellent conductivity (conductivity ≥ 98%), ensuring that current can be quickly and low - loss import the earth when a fault or lightning strike occurs, but also has excellent corrosion resistance and oxidation resistance. It can adapt to complex environments such as outdoors, humidity, and high temperatures, significantly extending the service life and reducing maintenance costs. In terms of structural design, the ground wire adopts a multi - strand stranding process, with the diameter of a single copper wire precisely controlled within the range of 0.1 - 0.3mm. This not only ensures the overall flexibility, facilitating construction in narrow spaces or complex wiring environments, but also improves heat dissipation efficiency by increasing the conductor surface area, avoiding overheating caused by short - term large current passing through. The outer insulating sheath is made of weather - resistant PVC material, which has the characteristics of acid and alkali resistance, ultraviolet resistance, and mechanical damage prevention. It can effectively protect the internal copper conductor from external environmental erosion. At the same time, the internationally universal green and yellow dual-color marking can clearly distinguish the ground wire from other cables, reducing the risk of misoperation during construction. From the perspective of application scenarios, the 25mm² specification is suitable for grounding protection of small power distribution equipment, household circuits, and weak current systems, such as lightning protection grounding of household appliances and communication base stations; The 50mm² specification is widely used in fault grounding of medium - sized industrial equipment, factory power distribution systems, and building power main lines, and can meet the safety protection needs under medium current load; As a high - current carrying model, the 95mm² specification is mainly used in key power facilities such as high - voltage substations, large industrial plants, and power stations. It can effectively divert the huge pulse current generated by lightning strikes or the fault current during line short circuits, avoiding equipment damage or casualties. In addition, the ground wire is produced in strict accordance with the International Electrotechnical Commission (IEC) and national GB standards. Each batch of products has undergone multiple quality inspections such as conductivity testing, high - voltage resistance testing, and mechanical strength testing to ensure reliability in extreme situations. Its professional - grade positioning not only meets the safety requirements of conventional power engineering, but also can provide stable grounding protection for precision equipment in special environments. It is an indispensable key component in the safe operation of power systems, building a solid defense line for power safety in industrial production, public facilities, commercial buildings and other fields.

The 16mm² and 25mm² green-yellow copper earth cables are core components of electrical safety systems, specifically designed for grounding protection. They use high-purity electrolytic copper as conductors, coated with weather-resistant PVC insulation, and adopt internationally recognized green-yellow dual-color marking. Widely applied in grounding circuits of construction, industry, and power sectors, they provide reliable leakage protection for equipment and personnel.​ In terms of specifications, the key differences between the two earth cables lie in conductor cross-section and current-carrying capacity. The 16mm² earth cable’s conductor is stranded by multiple fine copper wires, with a total cross-sectional area precisely controlled at 16±0.8mm². At room temperature (20℃), the conductor’s DC resistance is ≤1.15Ω/km, and the short-time withstand current can reach 1500A (for 1 second). It is suitable for small and medium-sized power distribution systems, main grounding terminals in civil buildings, and grounding of industrial equipment with power ≤50kW. The 25mm² earth cable has a conductor cross-sectional area of 25±1.2mm², DC resistance ≤0.74Ω/km, and short-time withstand current of 2500A (for 1 second), adapting to large factories, substation grounding grids, and safety grounding of high-power equipment (above 50kW).​ In terms of materials, the conductor is made of electrolytic copper with purity ≥99.95%, formed through multi-strand stranding technology, which combines excellent conductivity and flexibility. The stranded structure allows the earth cable to be bent and laid in narrow spaces (minimum bending radius is 6 times the outer diameter), while high-purity copper ensures that leakage current can be quickly conducted into the ground, reducing the risk of electric shock. The insulation layer is PVC material resistant to temperatures from -20℃ to 70℃, with insulation resistance ≥100MΩ. It has acid and alkali resistance, UV resistance, and mechanical wear resistance, maintaining stable performance even in humid and dusty industrial environments. The green-yellow two-color insulation strictly complies with IEC 60446 standards, intuitively identifying the grounding function to avoid confusion with phase lines and neutral lines, reducing wiring errors.​ In application scenarios, 16mm² earth cables are often used for safety grounding of residential distribution box grounding bars, air conditioner outdoor units, water heaters and other household appliances, as well as floor grounding trunks in commercial buildings. 25mm² earth cables are mainly used for grounding of large motors and transformer enclosures in factory workshops, main lines of substation grounding grids, and grounding systems of new energy charging piles. Both earth cables have passed the inspection of GB 50169 "Code for Construction and Acceptance of Grounding Devices" and need to be reliably connected to grounding bodies (such as galvanized angle steel, copper rods) to form a low-impedance grounding loop (grounding resistance ≤4Ω). With a service life of over 20 years, they can effectively cope with long-term current impact and environmental erosion, serving as the "lifeline" to ensure the safe operation of electrical systems.

This article introduces the yellow-green earth cable RV-K, a flexible stranded copper conductor specifically designed for safe grounding in electrical systems. Its core function is to reliably connect the metal enclosures of electrical equipment to the earth, forming a safe loop. In the event of equipment leakage or short circuit, it quickly conducts current into the ground, thereby preventing electric shock accidents and equipment damage, and is a key component ensuring the safe operation of electrical systems. This series of cables offers various cross-sectional specifications, including 16mm², 25mm², 35mm², 50mm², 70mm², etc., which can meet the grounding needs of electrical equipment with different powers and different scenarios. For example, the 16mm² specification is suitable for grounding low-power equipment such as small motors and household appliances; 25mm² and 35mm² can be used for medium-sized industrial machinery and distribution boxes; 50mm² and 70mm² specifications are more suitable for grounding systems of high-power equipment such as large industrial equipment and high-voltage distribution cabinets, ensuring effective grounding even under high current conditions. In terms of structure, the RV-K earth cable uses multi-stranded copper conductors. This design endows the cable with excellent flexibility, enabling it to easily adapt to complex installation environments. Whether bending, threading through pipes, or arranging in narrow spaces, it can maintain good performance, greatly reducing installation difficulty. At the same time, copper, as a conductor material, has extremely high conductivity, which can quickly conduct current, ensure the smoothness of the grounding loop, and guarantee the timely response of the grounding protection function. The insulation layer and sheath of the cable are made of materials that meet industry standards, which not only have good insulation performance to prevent leakage, but also can resist certain mechanical wear, chemical corrosion, and environmental factors (such as temperature changes, humidity, etc.), ensuring the stability and service life of the cable in various harsh environments. In addition, the rated voltage of the cable is 450/750V, which makes it suitable for low-voltage electrical systems. It is widely used in grounding projects in various fields such as industrial plants, commercial buildings, residential buildings, power facilities, and communication base stations, providing reliable grounding protection for various electrical equipment and personnel safety. To sum up, the yellow-green earth cable RV-K, with its various specification options, excellent conductivity, outstanding flexibility, and stable durability, has become an ideal choice in the field of electrical safety grounding, providing a solid foundation for the safe operation of electrical systems in different scenarios.