May. 13, 2026
In the rapidly evolving industrial landscape, the reliability of power distribution and control systems is non-negotiable. Whether it is a massive infrastructure project or a specialized industrial automation line, the "veins" of the system—the cables—must meet rigorous standards for safety, durability, and electrical efficiency.
The NYY Power Cable, particularly in the sophisticated 22×1.5 + 1×2.5 + 1×4 mm² (24-core) configuration, represents a pinnacle of hybrid cable engineering. When your project demands a high-volume installation—such as a 17,000-meter deployment—understanding the technical nuances and long-term benefits of this specific cable is crucial for procurement success.
The designation "NYY" follows a strict German VDE nomenclature that has become a global benchmark:
N: Standard cable with a copper conductor.
Y: Primary insulation made of Polyvinyl Chloride (PVC).
Y: Outer sheath also made of Polyvinyl Chloride (PVC).
This specific 24-core hybrid design is not a standard "off-the-shelf" wire. It is an integrated solution that combines three different cross-sectional areas (1.5mm², 2.5mm², and 4mm²) under a single, robust double-sheath. This allows for simultaneous control signaling and power delivery, significantly reducing installation complexity and tray-space requirements.
A cable is only as good as its materials. Let’s break down the layers of this engineering marvel based on its specific 17,000-meter production standards.
At the heart of this NYY cable are Solid Pure Copper Conductors (Class 1). Unlike stranded conductors, solid copper offers superior structural rigidity for fixed installations and maintains a more compact overall diameter.
22 Cores of 1.5 mm²: These cores, with a conductor diameter of 1.39 mm, are designed for precision control and signal transmission.
1 Core of 2.5 mm²: Featuring a 1.78 mm conductor diameter, this core provides auxiliary power or high-load signaling.
1 Core of 4 mm²: The largest core, with a 2.25 mm diameter, serves as a high-capacity power line or a dedicated safety earth.
Each conductor is encased in PVC TB-1 insulation, manufactured in strict accordance with the IS 473 standard. The insulation thickness is optimized for each core size:
1.5 mm²: 0.63 mm thickness (2.65 mm insulated diameter).
2.5 mm²: 0.74 mm thickness (3.25 mm insulated diameter).
4.0 mm²: 0.83 mm thickness (3.90 mm insulated diameter).
This calibrated thickness ensures that even when 24 cores are bundled together, there is zero risk of cross-talk or dielectric breakdown under standard operating loads.
One of the greatest challenges for technicians in large-scale projects (like a 17,000m install) is core identification. This NYY cable solves this with a multi-layered color coding system:
Outer Ring (14 Cores): Red, Blue, Orange, Black, White, Brown, Grey, Violet, Orange, Black, White, Brown, Grey, Violet.
Inner Ring (8 Cores): Red, Blue, Orange, Black, White, Brown, Grey, Violet.
Auxiliary Cores: The 2.5 mm² core is distinctively Blue, and the 4 mm² core follows the international safety standard of Yellow-Green.
This systematic layout prevents wiring errors, saves hours of testing time during commissioning, and ensures the safety of the maintenance crew for years to come.
The "NYY" designation implies double protection. This cable takes it a step further with specialized materials.
The 24 cores are stranded together into a circular formation and protected by a 1.2 mm Natural PVC Inner Sheath. This layer acts as a mechanical buffer, protecting the internal insulation from friction and ensuring the cable maintains its 22.3 mm outer diameter even under the tension of a long pull.
The final line of defense is the 1.8 mm Black Flame Retardant (FR-PVC) Outer Sheath.
Flame Retardancy: Essential for industrial safety, the FR-PVC prevents the spread of fire along cable runs.
UV Resistance: Engineered to survive the outdoors, this sheath is UV-stabilized to prevent the "cracking" commonly seen in lower-grade cables exposed to direct sunlight.
Robustness: With a meter weight of 0.79 kg/m, this cable is heavy-duty enough for direct burial while remaining flexible enough for standard industrial conduits.
When calculating the ROI of a 17,000-meter cable order, electrical efficiency is paramount. This cable is designed to minimize voltage drop and maximize safety.
Low resistance equals low heat and high efficiency. This cable guarantees:
1.5 mm²: 12.1 Ω/km max.
2.5 mm²: 7.41 Ω/km max.
4.0 mm²: 4.56 Ω/km max.
Rated at 600/1000V (0.6/1kV), this is a true power-grade cable. During quality control, it must pass a Dielectric Strength test of 3400V for 10 minutes without breakdown. This high safety margin ensures the cable can withstand temporary over-voltage surges common in industrial environments.
The cable operates comfortably between -15 °C and 70 °C. This makes it suitable for underground burial (where temperatures remain stable) as well as indoor factory environments where machinery heat might be a factor.
Ordering 17,000 meters of a specialized 24-core cable is a significant logistics and engineering undertaking. It represents approximately 13.43 tons of high-purity copper and specialized PVC.
Substation Control: Managing dozens of interlocking signals and providing auxiliary power for lighting or cooling systems.
Renewable Energy Plants: Connecting wind turbine control systems or solar farm monitoring stations to a central hub.
Industrial Automation: Serving as the primary trunk for PLC (Programmable Logic Controller) systems where multiple sensors and actuators need a single-path cable solution.
Public Infrastructure: Ideal for tunnel lighting and control systems where UV resistance and flame retardancy are mandatory for safety.
Engineers often choose this 22+1+1 configuration over separate cables for three main reasons:
Reduced Conduit Costs: Instead of running three separate conduits (one for control, one for auxiliary power, one for earth/main power), you only run one 22.3mm cable.
Space Efficiency: In cable trays, space is a premium. The compact circular stranding of this 24-core cable maximizes the "fill ratio" of your infrastructure.
Labor Efficiency: Pulling 17,000 meters of a single cable is significantly faster than pulling multiple lines, potentially saving thousands in labor costs on large-scale projects.
When you purchase NYY cable at this scale, you are not just buying wire; you are buying a guarantee of performance. Every meter of the 17,000-meter production run undergoes:
Spark Testing: To ensure the integrity of the PVC insulation.
Dimensional Checks: Ensuring the 1.2mm inner and 1.8mm outer sheaths meet the exact 22.3mm OD specification.
Conductivity Verification: Ensuring the solid pure copper meets the max Ω/km standards at 20°C.
A: Yes. NYY cables are specifically designed for direct burial. The double PVC sheath provides the necessary chemical and mechanical resistance to withstand soil moisture and pressure.
A: Flame Retardant (FR) PVC contains specialized additives that raise the oxygen index required for the material to burn. This means the cable will self-extinguish when the source of a flame is removed, preventing it from acting as a "wick" during a fire.
A: This "hybrid" design allows the cable to perform two roles. While the 22 cores of 1.5mm² handle signals, the 4mm² core can handle a significant power load or serve as a robust grounding path, eliminating the need for a separate power cable.
A: Many industrial facilities have high-intensity UV lighting or large windows. Standard PVC can become brittle and crack over 5–10 years under these conditions. A UV-resistant sheath ensures the cable's lifespan matches the 25–30 year lifespan of the facility.
The 22×1.5 + 1×2.5 + 1×4 mm² NYY Power Cable is a specialized tool for high-demand environments. From its solid pure copper core to its flame-retardant, UV-resistant outer jacket, every aspect of this cable is engineered for longevity.
For large-scale projects requiring 17,000 meters of consistent quality, this 24-core configuration offers the best balance of signal density, power capacity, and mechanical protection. Invest in a cable that doesn't just meet standards but exceeds them.
Contact our technical sales team today for bulk pricing and logistics planning for your 17,000-meter NYY cable requirement. Build with confidence, build with the best.
