NH-YJV Fire Resistant Crosslinked Polyethylene Insulated PVC Sheathed Power

The NH-YJV cable is a Class A fire-resistant power cable featuring cross-linked polyethylene (XLPE) insulation and a polyvinyl chloride (PVC) sheath; it is designed for fixed-installation power transmission and distribution systems subject to mandatory fire-resistance requirements. Its comprehensive structure comprises a copper conductor core, an XLPE insulation layer, a fire-resistant barrier wrapping layer, filler material, an inner bedding layer, and a PVC outer sheath, all manufactured in strict accordance with the GB/T 12706 and GB/T 19666 fire-resistance standards.

• Low voltage: 0.6/1kV (most widely used in civil and general industrial projects)
• Customized medium/low voltage specifications: 1.8/3kV, 3.6/6kV (used for auxiliary circuits in small power stations)

• Single-core: 1.5mm² – 630mm²
• Multi-core: 2-core / 3-core / 4-core / 5-core / 3+1 core / 3+2 core / 4+1 core

Conductor Material: T2-grade oxygen-free annealed copper, utilizing Class 2 stranded and compacted conductors; features low DC resistance and stable long-term electrical conductivity.

• XLPE Insulation: Permissible long-term operating temperature of 90°C; withstands instantaneous short-circuit temperatures up to 250°C (5-second duration); exhibits excellent resistance to aging and water-treeing breakdown.
• Fire-Resistant Mica Tape Layer: Features a double-layer wrap of high-temperature synthetic mica tape; maintains circuit integrity for over 90 minutes when exposed to 950°C flames.
• PVC Outer Sheath: ST2-grade weather-resistant PVC; offers resistance to UV radiation, oil, and mild acid/alkali corrosion; suitable for installation indoors, in cable trenches, and in conduits.

Maintains circuit continuity during exposure to open flames without short-circuit or open-circuit faults, ensuring emergency power supply for critical systems such as firefighting equipment, evacuation elevators, emergency lighting, and fire alarm linkage systems. The product has passed comprehensive third-party testing for fire resistance at the national level and comes with complete fire safety certification documentation, meeting requirements for project filing and acceptance.

Compared to traditional PVC-insulated cables, XLPE insulation reduces dielectric loss by 40%. During continuous full-load operation, the cable surface exhibits a lower temperature rise, thereby avoiding aging risks caused by overheating when cables are densely installed in vertical shafts. It supports long-distance power transmission with minimal voltage drop, helping to reduce overall line losses in the power distribution systems of large buildings.

• Bending performance: Multi-core cables feature a minimum bending radius of 12 times the outer diameter, facilitating installation around bends in cable trays, wall conduits, and basement cable shafts;
• Low-temperature performance: Installation can be performed at ambient temperatures as low as -15°C without the sheath cracking or the insulation layer suffering brittle failure;
• Moisture and mold resistance: The integrated, sealed cable structure eliminates the need for additional waterproofing modifications, making it suitable for environments such as direct underground burial, damp basements, and underground parking garages.

Under standard rated operating conditions, the cable boasts a design service life of up to 70 years, far exceeding that of standard non-fire-resistant YJV cables. Uniform insulation thickness and consistent fire-resistant wrapping ensure the absence of localized weak points; the cable requires no frequent maintenance throughout the building's lifecycle, effectively reducing labor and material costs for the property management team.

The product fully complies with China’s fire safety code GB 50016, the Standard for Electrical Design of Civil Buildings (GB 51348), and the code for construction and acceptance of electrical engineering in civil buildings. All product batches come with CCC mandatory certification, fire resistance test reports, factory inspection certificates, and material composition reports, fully meeting the documentation and approval requirements for government tenders, commercial real estate developments, and municipal infrastructure projects.

• High-rise residential and commercial complex buildings
  Emergency lighting, fire pump control circuits, fire elevator power supplies, smoke exhaust fan wiring, and fire alarm system trunk lines;
• Municipal public infrastructure
  Auxiliary power for metro stations, power distribution for hospital inpatient buildings, fire linkage circuits for school academic buildings, and public fire safety wiring for libraries and exhibition centers;
• Industrial plants and new energy projects
  Fire control circuits for non-explosion-proof areas in chemical plants, emergency power for centralized control rooms in photovoltaic power stations, and fire-resistant wiring for data center backup power systems;
• Underground space projects
  Underground utility tunnels, underground shopping malls, main power trunk lines for underground parking garages, and fire control cables for tunnel ventilation systems.

• Case 1: Municipal Utility Project for a 32-Story Central Commercial Complex
  The project electrical engineer selected NH-YJV 0.6/1kV 3×185+1×95 cables as the primary power supply for the basement fire pumps. During project acceptance, the cables successfully passed on-site flame tests conducted by the local fire department; their reliable, continuous power supply capability ensured the successful completion of a 3-hour simulated fire emergency test, allowing the project to pass the delivery audit without requiring any rectification.
• Case 2: Renovation and Expansion Project for a New Ward Building at an Urban General Hospital
  The procurement team selected a full range of NH-YJV multi-core cables for all circuits powering emergency medical equipment, fire alarms, and evacuation lighting. The availability of comprehensive CCC certifications and fire-resistance test reports facilitated "one-stop" documentation filing; compared to using smaller cable suppliers, this reduced the preparation time for fire safety acceptance by seven working days.
• Case 3: Power Distribution Project for Phase II of an Urban Underground Utility Tunnel
  Engineers selected NH-YJV low-voltage fire-resistant cables for the wiring of all fire linkage control and ventilation equipment within the utility tunnel. Featuring UV-resistant and moisture-proof sheathing, the cables are well-suited for the enclosed, humid, and long-term operating environment of the underground tunnel; assessments indicate no risk of insulation aging over the building's 50-year service life.

• Voltage Rating Matching: The 0.6/1kV series is preferred for fixed indoor installations in civil buildings; custom 1.8/3kV NH-YJV cables should be selected for auxiliary power circuits in small industrial power stations.
• Conductor Cross-section Calculation: Calculate current-carrying capacity based on total load power and reserve a 15%–20% load margin to accommodate future capacity expansion for building electrical equipment, thereby preventing cable overheating caused by undersized specifications.
• Core Count Selection: Use 3+2 core cables for single-circuit main power feeders; use 3-core cables for small single-phase fire-safety equipment; use 4+1 core NH-YJV cables for main lines supplying centralized distribution cabinets serving multiple pieces of equipment.

• Environmental limitations: Not suitable for environments involving direct, prolonged exposure to highly corrosive chemical liquids; protective conduit must be installed when laying cables in workshops containing corrosive chemicals.
• Bending control: Minimum bending radius specifications must be strictly observed during installation; excessive bending can damage the internal mica fire-resistant tape layer, thereby compromising fire-resistance integrity.
• High-density cable shaft layout: A 30% heat dissipation gap must be maintained between parallel NH-YJV cables to prevent heat accumulation caused by dense stacking, which would otherwise reduce actual current-carrying capacity.
• Direct burial requirements: When using direct burial, HDPE protective conduit must be installed to prevent sharp stones in the soil from crushing or damaging the cable's outer sheath and insulation layer.

• Document verification prior to order placement: Confirm that the supplier can provide the original CCC certificate, third-party fire-resistance test reports, and batch factory inspection data sheets; for government tender projects, reject products with incomplete certification documentation.
• Inspection of delivered batches: Check the cable surface markings (specifications and fire-resistance designations such as NH-YJV), copper conductor thickness, and insulation layer uniformity; consider randomly sampling products and sending them to local testing agencies for fire-resistance verification.
• Supply schedule planning: For large-scale municipal and real estate projects involving bulk procurement, place orders 10–15 working days in advance to allow sufficient time for production and inspection, thereby preventing construction delays caused by cable supply shortages.
• After-sales technical support: Prioritize suppliers capable of providing on-site technical guidance to electrical installation teams, and require them to supply specification selection calculations and cable laying technical manuals for reference by engineering and technical personnel.

We maintain a full inventory of NH-YJV cables, ranging from small 1.5mm² branch cables to large-cross-section 630mm² trunk cables. We offer customization options—such as adjustable fire-resistance ratings, precision cutting to specific lengths, and project-specific markings on the outer sheath—to meet the unique requirements of various tender projects. Procurement teams can achieve one-stop, centralized purchasing for fire-resistant power cables without the need to source different models from multiple suppliers.

We utilize 99.99% high-purity T2 oxygen-free copper, imported high-temperature-resistant mica tape, and premium-brand XLPE insulation materials. A three-tier quality control system is in place, covering raw material incoming inspection, in-process monitoring of semi-finished products, and fire-resistance spot checks on finished cables. By keeping batch performance deviations within the industry's strictest limits, we eliminate issues with inconsistent fire-resistance performance often caused by the use of inferior raw materials (common among smaller manufacturers).

We provide a comprehensive documentation package that includes CCC certification, fire resistance test reports, factory test reports, material quality certificates, shipping manifests, tax invoices, and technical compliance sheets for tenders. Our dedicated documentation team organizes all certification materials in accordance with the acceptance standards of local housing and urban-rural development bureaus and fire safety authorities, thereby significantly reducing the time engineers and procurement staff spend on document preparation and revision during project filing and acceptance phases.

Our in-house team of senior electrical engineers provides complimentary pre-sales technical support, covering services such as load current calculations, cable cross-section selection recommendations, optimization of cable laying schemes, and consultation on fire safety circuit design. For large-scale tenders, we assist procurement teams in preparing technical compliance documentation to ensure the proposed solution precisely meets the tenderer's fire safety technical requirements, thereby increasing the probability of winning the bid.

Factory-direct sales eliminate intermediary distribution layers; bulk engineering orders benefit from tiered pricing, effectively reducing the overall cost of electrical material procurement for projects. Equipped with automated production lines, we achieve a daily output of tens of thousands of meters of NH-YJV cable. Ample raw material inventory ensures on-time delivery even for massive municipal or real-estate bulk orders, mitigating the risk of construction delays caused by supply chain shortages.

We provide a 15-year quality warranty for all delivered NH-YJV cables. Should technical challenges arise during on-site installation, our technical team offers remote video guidance or on-site support within 48 hours. For long-term engineering contractor partners, we maintain dedicated client profiles to track project demand cycles and stock inventory in advance, thereby shortening delivery times for subsequent orders.

NH-YJV fire-resistant XLPE-insulated power cable is the designated standard cabling product for construction projects subject to mandatory fire emergency power supply requirements. Featuring stable Class A fire resistance, high current-carrying capacity, broad environmental adaptability, and full regulatory compliance, this product effectively meets the rigorous electrical safety and fire protection design standards required for modern municipal, commercial, medical, industrial, and underground infrastructure projects.

As a professional NH-YJV cable manufacturer with comprehensive qualifications and a mature project support system, we provide global procurement teams, general contractors, and electrical design engineers with a standardized, full range of cable products, one-stop technical documentation support, and expert electrical technical consulting. We help ensure projects successfully pass fire safety inspections while effectively managing overall procurement and construction costs.