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.