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.