The single core XLPE PVC insulated copper power cables involved in this article cover various specifications such as 70mm², 120mm², 150mm², and 240mm². With excellent performance, diverse size options, and competitive prices, they are widely used in the field of power transmission.​ In terms of specification parameters, the core of this series of cables lies in different conductor cross-sectional areas, namely 70mm², 120mm², 150mm², and 240mm². The size of the conductor cross-sectional area directly determines the current-carrying capacity of the cable. The larger the cross-sectional area, the higher the current-carrying capacity, and the more power can be transmitted. Tests show that at an ambient temperature of 25℃, the long-term allowable current-carrying capacity of the 70mm² cable is about 180A, which can meet the power transmission needs of equipment with a power of about 40kW; the long-term allowable current-carrying capacity of the 120mm² cable is about 240A, which can handle power transmission with a power of about 53kW; the long-term allowable current-carrying capacity of the 150mm² cable is about 280A, suitable for scenarios with a power of about 62kW; the long-term allowable current-carrying capacity of the 240mm² cable can reach 380A, which can meet the power demand of high-power equipment with a power of more than 84kW.​ In terms of materials, the cable uses high-quality pure copper as the conductor. Pure copper has excellent electrical conductivity with high conductivity, which can effectively reduce energy loss during power transmission and improve transmission efficiency. At the same time, pure copper has good ductility and mechanical strength, which can withstand a certain degree of stretching and bending during the production, laying, and use of the cable, and is not easy to break. The insulation layer is made of XLPE (cross-linked polyethylene) material. XLPE has excellent electrical performance, with high insulation resistance and good corona resistance, which can effectively prevent leakage and improve the safety performance of the cable. Its temperature resistance is excellent, and it can work stably in the temperature range of -40℃ to 90℃, adapting to temperature changes in different environments. The outer sheath is made of PVC (polyvinyl chloride) material. PVC has good mechanical strength and corrosion resistance, which can protect the insulation layer and conductor of the cable from external mechanical damage and chemical erosion, and prolong the service life of the cable.​ One of the characteristics of this series of cables is the diverse size options. Specifications such as 70mm², 120mm², 150mm², and 240mm² can meet the power transmission needs of different scenarios, providing great convenience for users. In the industrial field, 240mm² cables can be used for power transmission of large industrial equipment and production lines to ensure the stable operation of high-power equipment; 150mm² and 120mm² cables are suitable for small and medium-sized industrial equipment, workshop power distribution systems, etc.; 70mm² cables can be used for power supply of small motors, lighting systems, etc. In urban power distribution networks, these cables can be used for power transmission between substations and users. Appropriate specifications are selected according to different power loads to improve the rationality and efficiency of power distribution. In construction projects, they can be used for distribution trunks and branches according to the power demand of buildings to ensure power supply inside the buildings.​ In addition, this series of cables also has a very competitive price advantage. On the premise of ensuring product quality and performance, its price is more attractive than similar products, which can save costs for engineering projects. For large-scale power construction projects, industrial production enterprises, and construction projects, choosing such cables can not only meet the power transmission needs but also effectively control the project cost and improve the cost performance of the project.​ To sum up, the single core XLPE PVC insulated copper power cable, with its diverse specifications, excellent materials, outstanding performance, convenient size options, and competitive price, has become an ideal choice in the field of power transmission, providing reliable power support for various power transmission scenarios.