WD-YTTWY Cable
WD-YTTWY Cable: The High-Performance Fire-Resistant Solution
For demanding electrical installations where safety and reliability are paramount, the WD-YTTWY cable stands as a superior choice. Designed specifically for applications requiring exceptional fire resistance, this cable maintains circuit integrity during fire emergencies, ensuring critical systems remain operational. It is engineered for fixed installations in dry or damp environments, including conduits, trunking, and cable trays, making it ideal for power supply circuits in public buildings, transportation hubs, hospitals, and industrial complexes.
The WD-YTTWY cable is constructed with high-quality, bare copper conductors, ensuring excellent conductivity and durability. Each core is individually insulated with a special silicone rubber compound, renowned for its thermal stability and flexibility even at extreme temperatures. These insulated cores are then collectively sheathed in an extruded copper tube, which acts as a robust mechanical and protective layer. The final outer sheath is made from a halogen-free, flame-retardant material, minimizing smoke and corrosive gas emission in the event of a fire.
Key Features and Advantages
- Enhanced Fire Resistance: Withstands high temperatures and maintains functionality during fire conditions, crucial for emergency lighting, alarm systems, and fire pumps.
- Halogen-Free & Low Smoke: The outer sheath material does not emit dense smoke or corrosive halogen gases, improving visibility and reducing secondary damage during evacuation and firefighting.
- Excellent Thermal Stability: Silicone rubber insulation ensures performance is maintained across a wide temperature range.
- High Mechanical Strength: The unique copper tube sheath provides superior crush and impact resistance compared to traditional braided designs.
- Long Service Life: Resistant to aging, moisture, and many chemicals, ensuring reliable long-term operation.
Technical Specifications and Parameters
The following table outlines the standard construction and electrical parameters for WD-YTTWY cables:
| Conductor | Insulation | Sheath | Rated Voltage | Test Voltage | Min. Bending Radius |
|---|---|---|---|---|---|
| Bare copper, Class 1 or 2 per IEC 60228 | Silicone Rubber | Copper Tube + Halogen-Free Flame Retardant Compound | 300/500 V | 2000 V AC | 6 x Cable Diameter |
Detailed Product Data
| Core Number x Nominal Cross-Sectional Area (mm²) | Approx. Overall Diameter (mm) | Approx. Net Weight (kg/km) | Max. DC Resistance at 20°C (Ω/km) | Current Rating in Air (A) |
|---|---|---|---|---|
| 2 x 1.5 | 12.5 | 280 | 12.1 | 22 |
| 2 x 2.5 | 14.0 | 380 | 7.41 | 30 |
| 3 x 1.5 | 13.5 | 350 | 12.1 | 19 |
| 3 x 2.5 | 15.0 | 480 | 7.41 | 26 |
| 4 x 2.5 | 16.5 | 620 | 7.41 | 23 |
| 5 x 2.5 | 18.0 | 750 | 7.41 | 20 |
Standards and Certifications
The WD-YTTWY cable is manufactured in compliance with stringent international standards to guarantee performance and safety. It conforms to the requirements of BS 7846:2015 (Fired Performance) and is certified by relevant national approval bodies. The cable meets critical fire test classifications, including resistance to flame propagation (IEC 60332-1), low smoke density (IEC 61034), and absence of halogen acid gas emission (IEC 60754).
Application Guidelines
This cable is designed for fixed installations. When installing, ensure the minimum bending radius is not less than six times the overall cable diameter to prevent damage to the copper sheath and internal components. It is suitable for use in ambient temperatures ranging from -20°C to +70°C for extended periods, with a short-circuit conductor temperature not exceeding 250°C. Always refer to local electrical codes and regulations, and consult with a qualified electrical engineer for specific project requirements.
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