This article introduces aluminum - core cables that use aluminum (Al) as the conductor and cross - linked polyethylene (XLPE) as the insulation layer, covering multi - core cross - section specifications such as 4×35mm², 4×50mm², 4×70mm², 4×95mm², 4×120mm², 4×150mm², 4×185mm², 4×240mm², and 4×300mm².​ The structural design of this series of cables takes both performance and practicality into account: The aluminum conductor has good conductivity and economy, which can meet the basic needs of medium and low - voltage power transmission; The XLPE insulation layer has strong temperature resistance and stable insulation performance, which can ensure the safe operation of the cable under different working conditions and reduce risks such as electric leakage.​ In terms of application scenarios, small - section specifications (such as 4×35mm² and 4×50mm²) are suitable for small - load scenarios such as household incoming lines and power distribution for small shops; Medium - sized sections (such as 4×70mm² to 4×185mm²) can meet the needs of total power distribution in multi - storey buildings and power supply for small and medium - sized industrial equipment; Large sections (such as 4×240mm² and 4×300mm²) are applicable to medium and high - load power transmission scenarios such as main lines of large factories and regional distribution trunk lines. Overall, relying on its reasonable structure and diverse specifications, this series of cables can adapt to various medium and low - voltage power transmission needs.