This article introduces low - voltage aluminum cables covering two 4 - core cross - section specifications: 4×50mm² and 4×70mm². They use aluminum as the conductor and adopt a steel tape armored structure, which is suitable for low - voltage power transmission scenarios.​ This series of cables has significant advantages in structure and performance: The aluminum conductor has good conductivity and low cost, meeting the economic requirements of low - voltage transmission; The steel tape armored layer provides excellent mechanical protection for the cable, which can resist external impacts such as extrusion and collision, and prolong the service life of the cable; The overall design is suitable for low - voltage environments and can transmit electricity stably.​ In terms of application, 4×50mm² cables are suitable for small - load scenarios such as small shop power distribution and household incoming main lines, and can supply power to equipment such as lighting and small household appliances; 4×70mm² cables can meet medium - load needs such as total power distribution of multi - storey residential buildings and power supply for small industrial equipment. Both specifications, due to their armored structure, perform stably in laying environments that are prone to external forces such as underground direct burial and wall concealed laying, and are suitable for various low - voltage power transmission scenarios.​