Nyy and Nyy-J 5-core power cables include specifications such as 5X6mm², 5X25mm², and 5X50mm². With copper conductors as the core and XLPE as the insulation layer, they are power transmission carriers that balance safety and stability, widely applicable to industrial and civil scenarios.​ In terms of materials, high-purity copper conductors are the core advantage. They have high conductivity and low resistance loss, maintaining efficient power transmission during long-term use. The XLPE insulation layer has dual properties: its temperature resistance can adapt to a long-term working environment of 90℃, and it is not easy to age during summer electricity peaks or short-term overload of equipment; its insulation resistance is far higher than the standard value, which can isolate the risk of electric leakage. The 5-core structure accurately matches the three-phase five-wire circuit, among which 3 cores transmit three-phase current, 1 core serves as the neutral wire, and 1 core is used for grounding, eliminating the hidden danger of electric shock from the wiring logic. Nyy-J optimizes the structure on the basis of the basic Nyy, possibly enhancing the stranding density of the wire core or the sheath tightness, with better stability.​ Specification differences determine the subdivision of application scenarios. 5X6mm² has moderate current-carrying capacity, suitable for low-power scenarios such as office building socket clusters and small conference room equipment (such as projectors and printers); 5X25mm² has improved current-carrying capacity and can be adapted to medium-sized equipment such as workshop assembly line motors and shopping mall central air-conditioning external units; 5X50mm² has strong bearing capacity and can meet the power supply needs of high-power equipment such as factory transformer outgoing lines and large cold storage hosts. Both models have passed power transmission standard certification, providing continuous and stable power support for various electrical equipment in factory workshops, commercial complexes, high-rise office buildings and other scenarios.​