NH-RVV/soft core refractory sheathed wire
NH-RVV
NH-RVV soft core refractory sheathed wire is a reliable choice in the field of electrical safety! "NH" highlights its fire resistance. In a high-temperature flame of 750-1000℃, with the internal double-layer gold mica belt wrap structure, it can provide stable power supply for more than 180 minutes, ensuring the smooth flow of important circuits such as fire protection and emergency lighting at critical moments. It is made of stranded thin copper wires, soft and easy to bend, and can flexibly deal with complex wiring environments and reduce construction difficulties. The high-purity copper core has excellent conductivity, effectively reducing power loss and ensuring stable current transmission. The insulation and sheath are made of polyvinyl chloride, the inner insulation is protected from leakage, the outer layer is wear-resistant, moisture-proof and corrosion-resistant, and the wire core is protected in all aspects. This wire is suitable for AC circuits of 450/750V and below. It is widely used in high-rise buildings, shopping malls, hospitals, subways and other places with extremely high fire protection requirements. From the connection of equipment to lighting wiring, it can ensure safe electricity use in extreme cases and build a solid safety line for your electrical system.
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NH-RVV Soft Core Refractory Sheathed Wire: Uncompromising Safety for High-Temperature Environments
The NH-RVV soft core refractory sheathed wire is a specialized wiring solution engineered to deliver reliability in extreme heat and fire-prone scenarios. As a"soft core refractory sheathed wire,"it combines a flexible copper conductor with refractory insulation and a flame-resistant sheath, ensuring continuous operation even in critical emergencies.
Core Structure and Fireproof Performance
NH-RVV features a stranded copper core ("soft core") that offers superior bendability, making it ideal for complex wiring layouts in industrial machinery, commercial buildings, or emergency systems. The refractory insulation (typically mica or ceramic-based) provides exceptional heat resistance, maintaining electrical integrity at temperatures up to 750–1000°C—far exceeding standard PVC-insulated wires. The outer flame-retardant sheath (NH designation) complies with rigorous fire standards (e.g., GB/T 19666), self-extinguishing within 60 seconds after flame removal and emitting low smoke to minimize hazards in enclosed spaces. This three-layer design ensures the wire remains functional during fires, powering critical circuits like fire alarms, emergency lighting, and control systems.
Applications in High-Risk Scenarios
- Industrial Furnaces & Power Plants: Reliably wires high-temperature equipment, such as boilers and turbines, where exposure to heat and flames is constant.
- Commercial High-Rises: Installed in elevators, stairwells, and fire command centers to ensure emergency systems operate during fires.
- Marine & Offshore Platforms: Resists moisture, salt corrosion, and heat in confined engine rooms or offshore installations.
- Renovation Projects: Upgrades older buildings to meet modern fire safety codes, particularly in kitchens or attic wiring.
Key Advantages Over Standard Wires
- Thermal Stability: Refractory insulation prevents melting or degradation, even under prolonged heat exposure.
- Flexible Installation: Stranded copper cores allow easy routing through tight conduits or around obstacles, reducing installation time.
- Multi-Hazard Protection: Combines fire resistance with mechanical durability (abrasion and moisture resistance), eliminating the need for dual-layer wiring.
- Compliance: Meets international fire standards (e.g., IEC 60331), ensuring regulatory approval for public and commercial projects.
Choosing NH-RVV for Your Needs
When specifying NH-RVV, consider conductor gauge (ranging from 1.5mm² to 35mm²) based on current load and installation environment. For example, 2.5mm² wires suit lighting circuits, while 10mm² variants are ideal for high-power emergency systems. Always source from reputable suppliers to ensure genuine refractory materials and proper sheath thickness (≥0.8mm for standard gauges).
Conclusion
The NH-RVV soft core refractory sheathed wire is a critical component for projects where safety cannot be compromised. By prioritizing heat resistance, flexibility, and fire compliance, it safeguards lives and assets in environments where traditional wires would fail. Whether retrofitting a commercial building or wiring a new industrial facility, NH-RVV ensures that electrical systems remain both functional and fireproof—proving that advanced refractory technology can deliver peace of mind in the most demanding conditions.