Flame Retardant XLPE Insulated Steel Tape Armoured Power Cable For Fire-Critical Municipal, Commercial & Industrial Underground Distribution
Product Summary
Product Details
Flame retardant XLPE power cable
,Steel tape armoured electrical cable
,Underground power distribution cable
Product Description
ZR-YJV22 flame-retardant cross-linked polyethylene steel-tape armored cable conforms to the national standard GB/T 12706.1~12706.4-2020 "Cross-linked Polyethylene Insulated Power Cables". Its flame-retardant performance strictly complies with the GB/T 19666 standard, is consistent with the international IEC 60502 series standards, and complies with EU CE LVD and EMC directives. It also meets domestic fire safety regulatory filing and cross-border public infrastructure bidding and customs clearance standards.
All finished cable reels undergo third-party type testing in a nationally accredited electrical laboratory and are equipped with ZR series-specific flame-retardant professional testing items:
- bundled vertical flame spread test
- high-temperature thermal cycling aging test
- smoke density identification
- power frequency withstand voltage test
- partial discharge long-cycle stability test
- heavy mechanical extrusion impact test
- long-term damp heat immersion aging test
Each large-scale fire protection project order comes with a complete set of official filing documents stamped by the factory, provided free of charge:
- National Power Industry Full-Type Test Report
- ZR Flame Retardant Special Performance Inspection Certificate
- Batch Factory Inspection Records
- T2 Oxygen-Free Copper Raw Material Inspection Certificate
- CE Certificate
- Independent Full-Batch Traceability Archive
- a dedicated ZR-YJV22 pipe gallery and underground fire-resistant zone laying and terminal production operation manual
All documents fully comply with fire safety supervision filing, construction supervision review, municipal pipe gallery acceptance, hospital/airport public building fire safety inspection, and overseas EPC tender document review requirements.
Voltage Coverage: Low voltage 0.6/1kV, medium voltage 8.7/10kV, 8.7/15kV, high voltage 26/35kV
Customizable Conductor Layout: Single-core/Double-core/Three-core/Four-core/Five-core Category 2 T2 oxygen-free copper core cable, cross-section range 16mm²～630mm², suitable for small branch lighting circuits to large substation main feeders.
High-density circular stranded pure copper core, with DC resistance strictly controlled below the national standard upper limit. Ultra-low resistivity suppresses voltage drop in long-distance underground pipelines, maintaining stable continuous current carrying capacity under 24-hour full-load operation in commercial central air conditioning, heavy industrial equipment, and hospital power supply systems. High density reduces cable outer diameter, saving construction teams space in pipeline corridors and cable trenches. 100% new oxygen-free copper raw materials, without recycled copper, ensuring consistent conductivity across all production batches.
Utilizing a special halogen-containing flame-retardant cross-linked polyethylene composite material, fundamentally different from ordinary non-flame-retardant YJV22 cables. Long-term allowable continuous operating temperature up to 90°C; short-circuit instantaneous heat resistance temperature up to 250°C within 5 seconds, capable of resisting severe overcurrent impacts during power grid short-circuit faults. Its internal flame-retardant molecular structure can form a dense carbonized protective layer under high-temperature combustion, blocking heat conduction and vertical flame spread, which is the core safety guarantee for the wiring of enclosed pipe corridors and underground shopping malls.
Elastic, moisture-proof, and flame-retardant filler fills the gaps between multi-core insulated wires, forming a neat, circular cable profile. In a fire, it eliminates air convection channels within the bundled cable, further suppressing the lateral spread of flames in densely laid cable environments.
A one-piece, seamless PVC inner sheath wraps around the insulated wire assembly, isolating the internal insulation shielding layer from the external steel tape armor layer. This prevents groundwater, soil salt ions, weak acids, and weak alkalis from corroding the internal metal shielding layer and XLPE insulated wires.
A wide, overlapping soft copper tape shielding layer completely covers each insulated core wire, effectively conducting induced high-voltage currents and large short-circuit ground fault currents in medium and high voltage power grids. It also isolates internal high-frequency electromagnetic radiation, preventing signal distortion and interference from adjacent monitoring, communication, and fiber optic cables laid side-by-side in integrated utility tunnels.
The two layers of staggered, overlapping galvanized steel strip spiral winding structure provide strong radial compressive strength, resisting abrasion from underground rocks, long-term vehicle pressure on municipal roads, collisions with construction machinery, and gnawing by underground rodents. Precisely controlled winding gaps prevent the steel strip edges from scratching the inner PVC sheath during long-distance cable traction and multi-angle bending construction.
Utilizing a modified flame-retardant composite outer sheath, this sheath features an anti-aging and ozone-resistant formula, providing additional carbonization self-protection under open flame conditions. Suitable for direct underground burial, integrated pipe gallery installation, basement cable trenches, and semi-outdoor wall pipe installation; exhibits stable corrosion resistance in urban neutral soils and industrial light chemical residue soils.
- ZA-YJV22 / ZB-YJV22 / ZC-YJV22: Offers high, medium, and low flame retardant grades based on different building fire risk standards.
- WDZ-YJV22: A low-smoke, halogen-free flame-retardant upgraded product suitable for enclosed underground rail transit and large medical complexes.
- Enhanced Corrosion-Resistant Flame-Retardant Sheath: Customized for underground pipeline laying in chemical industrial parks.
- Low-Temperature Resistant Flame-Retardant Sheath: Suitable for municipal power grid renovation projects in northern mountainous areas.
3. Flame Retardant Performance, Electrical Performance, and Long-Term Environmental Durability Indicators
- Rated AC Operating Voltage: 0.6/1kV, 8.7/10kV, 8.7/15kV, 26/35kV Three-phase Power Distribution System
- Power frequency withstand voltage, lightning impulse withstand voltage, and partial discharge indicators fully comply with GB/IEC standard thresholds. Heat resistance and load-bearing capacity are superior to PVC insulated ZC-VV22 cables.
- Ultra-low dielectric loss design reduces cable self-heating loss during long-term continuous heavy-load operation in large commercial complexes and industrial parks.
- Cable Bundle Vertical Flame Spread Test Compliance: Complies with GB/T 19666 ZR General Flame Retardant Standard; after the cable bundle is ignited, the flame cannot spread vertically along the cable length and self-extinguishes within the specified test time.
- High-temperature carbonization self-protection: The XLPE insulation layer forms a dense carbonized isolation layer under open flame, preventing rapid oxidation of the internal copper core and circuit breakdown, and providing a longer safety power-off response window for the fire alarm linkage system.
- Thermal Aging Stability: After thousands of hours of cyclic aging tests at 90℃, the insulation layer showed no cracking, powdering, or sharp decrease in insulation resistance, making it suitable for installation in enclosed, high-temperature environments such as pipe corridors.
- Minimum Allowable Bending Radius: 15 times the cable's outer diameter
- Static Heavy-Load Compressive Strength: Passed the national standard compression destructive test; the XLPE insulation layer showed no cracking, delamination, or permanent deformation.
- Installation Environment Temperature Standard: Standard installation environment ≥0℃; Low-temperature customized version supports installation at -20℃ without preheating.
- Design Service Life under Standard Buried and Pipe Corridor Installation Conditions: Over 35 years, longer than PVC insulated flame-retardant cables.
- Damp Heat Resistance: Passed long-term continuous damp heat immersion aging tests, suitable for installation in water-rich basements and riverbank cable trenches.
- Chemical Corrosion Resistance: Resistant to long-term corrosion from weak soil acids, weak alkalis, and chloride ions.
When ordinary non-flame-retardant YJV22 cables are bundled and laid in underground shopping malls, integrated utility tunnels, and hospital basements, they create continuous fire spread paths, failing fire safety inspections. ZR-YJV22 employs a flame-retardant modified XLPE insulation + flame-retardant outer sheath double-layer fire protection system, passing national bundle-shaped flame-retardant tests. It is a basic mandatory cable type required by fire safety regulations for all public buildings and industrial enclosed cable trenches with fire risks. Electrical design engineers prioritize ZR-YJV22 in large commercial, medical, and municipal utility tunnel projects to avoid rework and cable replacement due to failed fire safety inspections.
Compared to ZC-VV22 PVC insulated flame-retardant cable, which has a long-term allowable temperature of only 70℃, ZR-YJV22 XLPE insulated cable can operate stably at 90℃ for extended periods, increasing its continuous current carrying capacity by 30% for the same cross-sectional dimensions. For applications with high peak power consumption and significant heat generation, such as large shopping malls, data center auxiliary power supplies, and heavy industrial backbone lines, this characteristic effectively avoids the risk of cable overheating during peak loads while maintaining complete flame-retardant safety performance, achieving the dual advantages of high transmission efficiency and fire resistance.
The double-steel-belt mechanical damage-resistant structure is suitable for high-risk laying scenarios such as municipal trunk road crossings, mountain rock foundation trenches, large underground utility tunnels, and dense cable trenches in the basements of commercial complexes. It effectively avoids insulation damage commonly caused by foundation settlement, temporary construction vehicle traffic, and friction from underground sharp rocks in urban power grid upgrades and commercial real estate projects, thereby reducing the general contractor's subsequent cable replacement and line maintenance costs.
The ZR-YJV22 series covers low-voltage, medium-voltage, and high-voltage levels, with diverse conductor structures from single-core to five-core, and cross-sectional specifications ranging from small branch lighting to large substation main feeders. It can simultaneously meet the application needs of low-voltage power distribution in underground shopping malls, medium-voltage trunk lines in chemical industrial parks, and high-voltage incoming lines in municipal central substations. EPC contractors can complete the procurement of all flame-retardant armored cables for an entire commercial or industrial park project with just one supplier, thereby simplifying procurement classification, incoming material inspection, and on-site temporary warehouse management.
The ZR dedicated flame-retardant XLPE cable automated production line is equipped with real-time online monitoring equipment to monitor the uniformity of flame-retardant raw material mixing, insulation layer thickness, and steel tape armor winding tightness. The flame-retardant performance and electrical parameters of each batch are strictly controlled within standard tolerances, eliminating the risk of inconsistent flame-retardant grades or unstable current carrying capacity between different cable reels, and avoiding delays in fire protection acceptance due to unqualified individual batches of cables.
5. Multiple Vertical Fire Protection Engineering Application Areas + Three Exclusive Real-World Construction Cases
- Large Commercial Real Estate Projects: Underground main cables for supermarkets and shopping centers, power supply circuits for underground commercial integrated pipe corridors, and power distribution lines in enclosed cable trenches of large logistics parks.
- Public Medical and Transportation Infrastructure: Flame-retardant cables for dedicated substations of Class A and Class III hospitals, underground power supply circuits for airports, and auxiliary medium-voltage power distribution cables for urban subways.
- Chemical and Light Industrial Parks: Underground power trunk lines for chemical production workshops, flame-retardant cables in utility tunnels around hazardous materials warehouses, and power supply circuits in dense cable trenches at manufacturing plants.
- Municipal Integrated Utility Tunnels and Urban Power Grid Renovation: Integrated low-voltage power cables in central city integrated utility tunnels, flame-retardant armored cables for power grid upgrades in old urban areas, and underground power distribution circuits crossing municipal roads.
The electrical design of a core commercial complex in a certain area adopted a large quantity of ZC-grade ZR-YJV22 four-core and three-core series flame-retardant armored cables as the main trunk lines buried in all basements for air conditioning, elevators, and lighting. The construction area was a fully enclosed underground parking lot and commercial activity area, belonging to a Class B fire hazard area, with dense cable laying. Double-layer steel tape armor can resist foundation settlement and mechanical impact from decoration construction; the flame-retardant performance of the ZR series cables has fully passed the third-party testing of the municipal fire department. Our factory provided a complete flame retardant test report and a full set of certification documents, which passed the acceptance tests of the fire and power departments on the first attempt, without the need for additional sampling tests. After four years of continuous full-load operation (including peak summer and winter seasons), no cable overheating or hidden faults occurred, reducing the daily electrical inspection labor costs for the property by 70%.
A fine chemical manufacturing park constructed a fully enclosed underground integrated utility tunnel, uniformly selecting ZB flame-retardant modified ZR-YJV22 8.7/15kV three-core cables as all medium-voltage buried trunk lines within the tunnel. Due to the enclosed space of the tunnel, natural heat dissipation is poor, and the surrounding soil contains residual weakly acidic chemical wastewater. A reinforced anti-corrosion and flame-retardant outer sheath and a full copper strip shielding structure were adopted to effectively resist internal high-temperature accumulation and underground chemical corrosion, while simultaneously suppressing electromagnetic interference to nearby chemical monitoring optical cables. Standardized, complete fire protection certification documents accelerated the park's safety supervision and review process, ensuring uninterrupted power supply to the synthesis production equipment 24 hours a day, year-round.
A Grade A hospital in a certain region underwent expansion and power grid renovation. ZC flame-retardant ZR-YJV22 8.7/10kV three-core armored cables were laid underground for the incoming lines of two large-capacity dedicated transformers. The hospital's power system is a mandatory uninterruptible power supply system, and the underground cable trenches are adjacent to a medical waste storage area, posing a potential risk of open flame. The ZR flame-retardant cross-linked polyethylene (XLPE) structure forms a carbonized protective layer in the event of accidental ignition, extending the safe maintenance time for medical equipment; the double-layer steel tape armor prevents insulation damage caused by underground pipeline maintenance. Stable batch electrical parameters eliminated the risk of localized overheating during peak power consumption periods for medical equipment, reducing annual underground line maintenance and equipment downtime losses by more than 83%.
6. Fire Protection Standard Design Matching and On-site Laying Acceptance Manual
- Flame Retardant Rating Classification Matching Rules: ZC-grade ZR-YJV22 is selected for basements of ordinary residential buildings and small commercial buildings; ZB-grade is upgraded for large shopping malls, hospitals, chemical industrial parks, etc.; for fully enclosed long-distance integrated pipe gallery projects, ZA-grade high-grade flame-retardant cables are used according to local fire protection regulations.
- Load and Transmission Distance Matching Logic: XLPE cables are resistant to high temperatures up to 90℃ and are suitable for underground pipeline transmission over distances of 500 meters or more; when the transmission distance exceeds 800 meters, the transformer capacity, cable length, and peak load parameters must be submitted to our flame-retardant cable technical team for free voltage drop simulation calculation to avoid excessive terminal voltage deviation affecting equipment operation.
- Laying Environment Customization Matching: ZR-YJV22 is selected for neutral soil in ordinary cities; reinforced anti-corrosion and flame-retardant modified type is suitable for chemical industrial parks and industrial residual soil; low-temperature resistant type is suitable for municipal power grid renovation projects in northern high-altitude areas.
- Mandatory Shielding Structure Confirmation: Medium and high voltage ZR-YJV22 cables laid in enclosed pipeline corridors and chemical industrial parks must maintain a complete and continuous copper tape metal shielding layer to suppress strong electromagnetic interference to adjacent monitoring, communication, and fiber optic low-current cables.
- Ambient Temperature Control Requirements: The ambient temperature for laying standard ZR-YJV22 cables must not be lower than 0℃; in winter, low-temperature flame-retardant modified sheath models must be selected to avoid brittle cracking of the outer sheath during long-distance bending operations.
- Bending Radius Limitation Standards: The bending radius for all bends, conduit installations, and transformer/distribution cabinet terminal connections must be ≥ 15 times the cable's outer diameter; forced sharp-angle bends are prohibited to prevent cracking of the internal thick XLPE insulation layer and the risk of concealed partial discharge and fire.
- Heat dissipation and fire protection requirements for parallel cable bundling: In cable trenches and pipe corridors, sufficient heat dissipation gaps should be reserved between parallel ZR-YJV22 flame-retardant cables to avoid excessive dense stacking that leads to heat accumulation and current carrying capacity attenuation; fireproof isolation barriers should be used to separate medium-voltage, low-voltage and weak current cable laying areas to block the cross-spread of flames.
- Reinforcement and protection measures for municipal road intersections: Lay a thick reinforced concrete protective layer above the cable layer beneath the main motor vehicle lanes to withstand the rolling loads of heavy vehicles over long periods; reserve sufficient cable length at both ends of substations and distribution cabinets for future cable terminal replacement and circuit fault repair.
- Before the acceptance work begins, check the batch factory inspection certificate, the third-party ZR bundle flame retardant full-type test report, and the copper material raw material certificate.
- After cable laying and cable terminal manufacturing are completed, complete the power frequency withstand voltage test and long-term partial discharge test.
- Measure the insulation resistance value of each phase core wire to ensure that all test data meet the national flame-retardant power cable acceptance standards.
- Complete the reliable grounding connection of the copper tape shielding layer and the double-layer steel tape armor layer, and test the grounding resistance to meet the requirements of fire prevention public and industrial power grid safety operation specifications.
Each delivery includes a complete set of officially certified materials stamped by the factory free of charge:
- Authoritative full-type test report from the national power industry
- GB/T 19666 ZR flame-retardant material special inspection certificate
- IEC certificate of conformity
- CE certification documents
- copper raw material certificate of origin
- batch production inspection records
- a professional ZR-YJV22 pipe gallery and underground laying guidance manual
These documents fully meet the requirements for fire safety supervision filing, construction supervision review, chemical industrial park safety acceptance, and overseas public infrastructure EPC customs clearance, avoiding delays in the construction cycle of large-scale industrial and commercial projects due to incomplete flame-retardant certification materials.
Our professional ZR flame-retardant cable R&D team provides free consultation services:
- full-load current carrying capacity calculation for public buildings
- voltage drop simulation for long-distance underground utility tunnels
- cable voltage rating and cross-section matching recommendations
- ZA/ZB/ZC flame retardant rating selection
- optimized design of overall fireproof laying schemes for enclosed utility tunnels
For bulk orders from large shopping malls, chemical industrial parks, and municipal integrated utility tunnels, professional engineers provide remote video on-site construction guidance, promptly helping construction teams solve technical problems suchs as cable bundling and laying, underground cable protection, and fire protection acceptance.
We have established long-term, exclusive strategic supply partnerships with top-tier T2 oxygen-free copper smelters and certified high-efficiency flame-retardant cross-linked polyethylene (XLPE) raw material manufacturers, completely eliminating the use of recycled copper and inferior non-flame-retardant plastic raw materials. Each batch of products undergoes full-bundle flame-retardant and high-voltage laboratory performance testing before delivery; the mixing ratio of flame-retardant materials, insulation layer thickness, and steel tape armor wrapping tightness are monitored online in real time throughout the process to ensure the flame-retardant safety and stable electrical performance of all cable reels, eliminating fire safety hazards in dense bundling projects.
Our specially designed intelligent automated production workshop for ZR-YJV22 cables maintains ample inventory of mainstream low-voltage/medium-voltage standard specifications, enabling immediate shipment. For key commercial real estate, chemical industrial parks, and municipal utility tunnel EPC projects, we prioritize the production of customized high-grade flame-retardant, corrosion-resistant, and low-temperature modified ZR-YJV22 cables to fully meet the urgent construction schedule requirements of fire protection engineering contractors.
Each cable reel is printed with a unique production batch number, production date, voltage rating, and core specifications, enabling full traceability from raw material supply to finished product delivery. Large orders from major commercial, medical, and chemical industrial parks are eligible for extended factory quality assurance. If, during the warranty period, non-human-caused damage results in defects in the manufacturing process such as flame retardant failure, insulation aging, or armor layer damage, we will provide free replacement and full cable replacement services to minimize the risk of large-scale power outages and reduce fire safety hazards for the purchaser and long-term EPC project partners.
ZR-YJV22 flame-retardant cross-linked polyethylene (XLPE) steel-tape armored power cable is the standard flame-retardant armored cable specified for commercial, medical, chemical, and municipal integrated pipeline power distribution projects with stringent fire safety requirements worldwide. It is widely recognized and recommended by fire protection design institutes, municipal power grid companies, and global public infrastructure EPC contractors. Its unique ZR bundled flame-retardant composite insulation structure, 90℃ high-temperature resistance and high current-carrying capacity, and all-around double-layer steel tape mechanical damage resistance enable this cable to adapt to various complex enclosed underground fire-resistant laying environments, reasonably balancing the initial project procurement investment and long-term fire safety maintenance costs for project owners and contractors.
Our factory integrates independent R&D of flame-retardant medium and low voltage cables, intelligent automated production, and a fully standardized flame-retardant high-voltage testing laboratory. We focus on providing stable, fully fire-compliant, and cost-effective ZR-YJV22 series armored cables to global commercial real estate, public healthcare, chemical, and municipal utility tunnel infrastructure users. We support long-term, stable, and bulk supply cooperation for various fire-sensitive underground power distribution projects.
