PVC Stromkabel Nyy-O, Nyy-J, and Nyy Yer Alti Kao are 4-core high-current earthed power cables, covering specifications such as 4X10mm², 4X16mm², and 4X25mm², suitable for scenarios requiring stable grounding and high-current transmission.​ In terms of materials, the conductor is made of high-quality copper, which has excellent conductivity and can transmit high current efficiently; the insulation layer and sheath are made of PVC material, which has good insulation, corrosion resistance, and mechanical strength, and can adapt to complex environments such as underground (the Yer Alti Kao model is especially suitable for underground laying). The 4-core design includes an earthed core, which meets safety specifications and can effectively prevent the risk of electric leakage.​ In terms of specifications, 4X10mm² is suitable for grounding and power supply of small industrial equipment, such as small machine tools in workshops; 4X16mm² can meet the needs of medium-sized equipment, such as central air-conditioning units in shopping malls; 4X25mm² is suitable for large equipment, such as the main power supply of factory production lines. They are widely used in underground and ground wiring of industrial plants and commercial buildings, providing stable power and safe grounding protection for high-current equipment.