This article involves single-core aluminum cables and power cables, with specific specifications as follows: 50mm single-core aluminum cable: Aluminum is used as the conductor material. The single-core design makes it more flexible in wiring, suitable for medium and low-power power transmission scenarios, such as the connection of small electrical equipment and indoor local power supply lines. 300mm single-core aluminum cable: With a larger conductor cross-sectional area, the current-carrying capacity is correspondingly increased, which can meet the needs of larger power transmission. It can be used for power supply of industrial equipment, main power supply lines of medium-sized buildings, etc. 600mm² single-core aluminum cable: It is a large-section cable with excellent conductivity and current-carrying capacity, suitable for high-power power transmission scenarios, such as power supply systems of large factories and outgoing lines of substations. Nayy-O 1×400mm² power cable: It has a single-core structure with a conductor cross-sectional area of 400mm². "Nayy-O" may be a specific brand or model identifier. This cable has moderate current-carrying capacity, balancing transmission efficiency and installation convenience, and is often used in building distribution trunk lines, outdoor power transmission lines and other scenarios. These cables all use aluminum as the core conductor. Aluminum has the characteristics of light weight, relatively low cost, and good conductivity, and is widely used in various power transmission fields. The design of different cross-sectional specifications can meet the diversified power supply needs from low power to high power, and from small equipment to large systems.