XLPE insulated 310mm² and 38mm² copper power cables are high-performance electrical transmission cables. With the high conductivity of copper conductors and the excellent performance of XLPE insulation layers, they play an important role in various electrical systems, providing stable and reliable guarantees for power transmission.​ The conductor is made of high-purity oxygen-free copper with a purity of ≥99.95%, manufactured through multi-strand precision stranding process. The DC resistance of the single-core conductor of 38mm² cable at 20℃ is ≤0.209Ω/km, and that of 310mm² is ≤0.168Ω/km, which is much lower than the industry standard. It can minimize energy loss during power transmission and ensure efficient power transmission. Copper conductors have excellent conductivity, with a conductivity of up to 100% IACS (International Annealed Copper Standard), far exceeding other common conductor materials such as aluminum, and are very suitable for scenarios with high requirements for conductivity. At the same time, copper has high mechanical strength, with a tensile strength of ≥200MPa, which can withstand a certain amount of tension and bending stress, facilitating laying and installation in different environments.​ The insulation layer is made of high-quality XLPE (cross-linked polyethylene) material. After special processing, its temperature resistance level reaches 90℃, and it can work stably for a long time in the ambient temperature range of -40℃ to 90℃. In case of short circuit (lasting 5 seconds), it can withstand a high temperature of 250℃, effectively ensuring insulation reliability under extreme working conditions. The volume resistivity of XLPE material is ≥10¹⁴Ω·cm, and the dielectric loss tangent is ≤0.002 (at 90℃), with excellent insulation performance, which can effectively isolate current, prevent leakage, and ensure the safety of power transmission. In addition, the insulation layer also has good chemical corrosion resistance, which can resist the erosion of acids, alkalis, oils and other chemical substances, and prolong the service life of the cable.​ The overall structure design of the cable takes into account both stability and safety. In addition to conductors and insulation layers, some models are also equipped with copper tape shielding layers. The shielding layers have uniform thickness, which can effectively suppress electromagnetic interference, reduce the impact of external signals on cable transmission, and also prevent internal signals of the cable from interfering with the outside world, especially suitable for occasions with high requirements for electromagnetic compatibility. The sheath layer is made of weather-resistant PVC (polyvinyl chloride) or PE (polyethylene) materials. PVC sheath has a tensile strength of ≥12MPa and an elongation at break of ≥150%, with good wear resistance and impact resistance; PE sheath has more excellent flexibility and low-temperature resistance, and is not easy to embrittle in low-temperature environments. Suitable sheath materials can be selected according to different use environments.​ In terms of current-carrying capacity, the 38mm² cable has a current-carrying capacity of about 55A when laid in air and about 70A when laid underground; the 310mm² cable has a current-carrying capacity of about 65A in air and about 85A when buried, which can meet the power supply needs of electrical equipment with different powers. Its minimum bending radius is 10 times the cable outer diameter (static). The outer diameter of 38mm² cable is about 15mm, with a static bending radius of 150mm; the outer diameter of 310mm² cable is about 17mm, with a static bending radius of 170mm, which is convenient for flexible laying in narrow spaces and complex terrains.​ In practical applications, the cable is widely used in building electrical wiring, such as the connection of lighting and power systems in residential and commercial buildings; in the industrial field, it can be used as the power connection line for small and medium-sized motors, machine tools and other equipment; in communication base stations, data centers and other places, it is used for power transmission in low-voltage distribution systems; it is also suitable for power supply lines of outdoor electrical equipment such as agricultural irrigation equipment and outdoor advertising facilities. Its excellent performance and wide adaptability make it an indispensable part of various electrical systems.