This underground cable covers multiple wire diameter specifications including 120mm², 185mm² and 400mm², adopting a 4-core with earth design, specially built for underground laying scenarios.​ The cable uses XLPE (cross-linked polyethylene) as the insulation layer, which has excellent temperature resistance and insulation performance. It can stably insulate current in underground environments with humidity and temperature changes, preventing the risk of electric leakage. The outer layer is made of PVC material, and the unarmoured design ensures flexibility while endowing the cable with good corrosion resistance and wear resistance, adapting to complex underground environments such as soil and gravel.​ In the 4-core with earth structure, the 4 cores are responsible for power transmission, and the earth wire provides safety protection, which can quickly conduct leakage current and improve electricity safety. Different wire diameters correspond to different current-carrying requirements: 120mm² is suitable for small and medium-power underground power distribution, 185mm² is adapted to medium and high-power equipment, and 400mm² can meet the transmission needs of large underground power main lines.​ The product is produced in strict accordance with underground cable standards, with outstanding performance in pressure resistance and anti-aging. It can withstand mechanical pressure and environmental erosion of underground laying for a long time, providing stable and reliable power support for scenarios such as underground power distribution systems, municipal engineering, and underground power supply in industrial plants.