This cable is a 3-core Steel Wire Armoured (SWA) cable with a specification of 3X240mm². The conductor is available in copper or aluminum, offering high conductivity and lightweight advantages respectively. The copper conductor has a copper content of over 99.9%, with excellent conductivity, suitable for high-power transmission scenarios; the aluminum conductor weighs only 1/3 of the same specification copper conductor, with lower installation costs, suitable for medium and low-load circuits.​ The insulation layer adopts a composite structure of cross-linked polyethylene (XLPE) and polyvinyl chloride (PVC): XLPE has a temperature resistance range of -40℃ to 90℃ and an insulation resistance of ≥1000MΩ, which can resist high-voltage impact and temperature fluctuations; the outer PVC sheath has a tensile strength of ≥12MPa, wear-resistant and corrosion-resistant, and can adapt to complex environments such as humidity and dust. The steel wire armouring layer is made of high-carbon steel with an armouring density of ≥90%, which has excellent mechanical protection capabilities, can withstand external extrusion and stretching, and is suitable for harsh laying methods such as direct burial and pipe 穿.​ The cable has a rated current-carrying capacity of 420A (copper conductor)/320A (aluminum conductor) and a rated voltage of 10kV. It is widely used in industrial plant power distribution, main lines of high-rise buildings, outdoor overhead and underground transmission projects, providing stable and reliable guarantee for high-power equipment and long-distance power transmission.