WDZN-YJY Fire-Resistant Power Cable 0.6/1kV LSZH for Heavy Infrastructure & Critical Circuit Integrity
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WDZN-YJY is a fire-resistant, low-smoke, zero-halogen (LSZH) power cable widely used in fixed installations for power transmission and distribution circuits. Featuring solid or tinned copper conductors, cross-linked polyethylene (XLPE) insulation, and an LSZH outer sheath, this cable meets the stringent fire safety requirements of densely populated public buildings and critical infrastructure.
In the event of a fire, the WDZN-YJY cable emits minimal toxic halogen gases and sparse smoke, helping to maintain visibility for safe evacuation while ensuring continuous power supply to emergency lighting, fire alarm systems, fire pumps, and critical control circuits. Electrical engineers, design institutes, general contractors, and bulk purchasers typically prioritize this cable model for projects involving fire-rating requirements, such as building tenders, public facility renovations, and municipal engineering works. Unlike standard YJY power cables, the WDZN-YJY utilizes an LSZH formulation and a fire-resistant structural design, engineered to comply with national and international fire safety standards for high-risk environments.
Class 1 solid copper conductor / Class 2 stranded copper conductor; made of high-purity oxygen-free copper, featuring low DC resistance, stable electrical conductivity, and excellent oxidation resistance during long-term continuous operation.
Cross-linked polyethylene (XLPE) insulation; offers excellent heat and aging resistance and high dielectric strength, maintaining stable insulation performance amidst long-term temperature fluctuations.
Special mica fire-resistant tape wrapped around the insulated cores; effectively inhibits flame propagation and ensures circuit integrity throughout the specified fire-resistance test duration.
Eco-friendly, halogen-free filling material; ensures a circular cable profile and provides good compressive strength, maintaining internal structural stability during installation and bending.
Low-smoke, halogen-free polyolefin sheath; features flame-retardant properties and low smoke density, emits no halogens during combustion, and offers excellent UV and weather resistance.
- Rated Voltage: 0.6/1 kV (most common specification for building power distribution systems; 1.8/3 kV and 3.6/6 kV specifications available upon request)
- Operating Temperature: Permissible long-term operating temperature 90°C; maximum short-circuit withstand temperature 250°C (duration up to 5 seconds)
- Fire Rating: Class A flame-retardant + fire-resistant
- Smoke Density: Low-smoke rating; light transmittance during combustion smoke test ≥60%
- Halogen Content: Zero halogen emissions; complies with toxic gas emission limits
- Conductor Cross-section Range: 1.5 mm² – 400 mm²
- Core Configuration Options: Single-core, 2-core, 3-core, 4-core, 5-core, and custom combinations such as 3+1, 3+2, and 4+1 cores
- Minimum Bending Radius: ≥15 times the cable outer diameter (for fixed installation)
- Installation Ambient Temperature: ≥0°C (during laying/installation)
- Complies with GB/T national standards for low-smoke, halogen-free, fire-resistant cables
- Fire safety product certification suitable for construction project tenders
- Third-party test reports covering fire performance, smoke toxicity, and halogen content
- Customized international test certificates available for overseas export projects upon request
Utilizes a mica tape fire-resistant layer structure to ensure the cable remains operational and energized for the required duration even when directly exposed to flames. This feature prevents sudden power loss in critical emergency circuits during building fires, meeting mandatory fire safety electrical design codes for high-rise and public buildings; in contrast, standard non-fire-resistant cables fail rapidly when exposed to flames, rendering them unable to maintain the operation of emergency systems.
When traditional PVC-sheathed cables burn, they release dense black smoke and corrosive halogen-based acidic gases, which can cause asphyxiation and damage electrical equipment. In contrast, WDZN-YJY cables emit minimal smoke and produce no toxic halogen gases during combustion; this aids in the visibility of escape routes, reduces the risk of secondary fire hazards, and meets environmental assessment criteria for green building certification.
The use of oxygen-free copper conductors minimizes electrical energy loss during long-distance transmission, while the XLPE insulation layer offers excellent resistance to thermal aging, ozone erosion, and partial discharge. These cables are designed for continuous full-load operation for up to 25 years, thereby reducing the frequency of post-installation maintenance and lowering the total lifecycle cost of the project.
The outer sheath offers excellent tensile strength, crush resistance, and abrasion resistance, while providing moderate moisture protection. Suitable for indoor concealed wiring, trench installation, vertical shaft mounting, and limited outdoor applications, the cable withstands temperature fluctuations and environments involving mild chemical corrosion—such as those found in building utility shafts.
This model is a specified cable type in electrical designs for numerous public infrastructure projects. It comes with comprehensive certification documentation, facilitating project filing, final acceptance inspections, and the submission of tender materials, thereby eliminating compliance-related hurdles for contractors.
Suitable for backbone power distribution, emergency lighting circuits, fire control cabinet wiring, elevator emergency power supplies, dedicated circuits for smoke exhaust fans, and power distribution lines in public corridors within high-rise apartments, office buildings, shopping centers, and mixed-use commercial complexes.
Suitable for power distribution systems in subway stations, tunnel ventilation and monitoring circuits, wiring for underground pedestrian passages, auxiliary power lines in airport terminals, and fire-resistant electrical circuits in public areas of railway stations; in these scenarios, fire evacuation capabilities and low-smoke characteristics are mandatory design requirements.
Power supply systems for hospital inpatient buildings; cabling for school teaching buildings; and facilities such as libraries, museums, exhibition centers, sports venues, nursing homes, and densely populated public areas. Electrical design standards impose strict regulatory requirements on these facilities regarding fire safety and the control of toxic gases.
Urban integrated cable trench installations; power distribution trunk lines for underground utility tunnels; electrical upgrades for municipal renovation projects; and modifications to dedicated fire-safety circuits in underground parking garages.
Suitable for fire alarm linkage circuits, UPS backup power wiring, fire control loops in light-duty chemical production workshops, and emergency power branch circuits in server rooms; meets design requirements for fire-resistant isolation in industrial electrical systems.
A general contractor procured a large quantity of WDZN-YJY multi-core cables to retrofit the emergency power system of an office building in a central business district. The existing standard PVC cables no longer met the updated fire safety code requirements identified during the annual fire safety inspection. By utilizing WDZN-YJY cables for fire pump, emergency lighting, and fire alarm circuits, the project successfully passed the fire safety acceptance inspection, and comprehensive test reports were submitted for project filing. Our team provided on-site technical parameter verification, Bill of Materials (BOM) optimization, and delivery scheduling aligned with the construction timeline.
A municipal electrical engineering company selected our WDZN-YJY (3*185mm² + 1*95mm²) cables as the primary power distribution cabling for a new subway station project. The product’s low-smoke, halogen-free, and fire-resistant properties fully complied with subway design standards. We provided comprehensive services—including custom batch production, compilation of third-party test documentation, containerized export packaging, and phased delivery to the construction site—thereby meeting the client's requirements for large-scale bulk procurement and multi-stage installation across projects.
The electrical design institute specified the exclusive use of WDZN-YJY cables for emergency power circuits in patient wards, backup power supplies for operating rooms, and fire safety system wiring. Given the high occupancy density of medical facilities, low-smoke and non-toxic characteristics during combustion were critical design requirements. We assisted the procurement team in compiling a complete set of certification documents, provided sample testing prior to bulk ordering, and arranged phased deliveries aligned with the construction schedule, effectively alleviating the client's on-site inventory pressure.
Avoid laying cables when the ambient temperature is below 0°C; if installation in low-temperature environments is unavoidable, the cables should be appropriately preheated to prevent sheath cracking during bending.
Strictly adhere to minimum bending radius requirements during operations such as conduit pulling, tray installation, and routing around corners; excessive bending can damage the internal insulation structure and compromise long-term insulation safety.
When routing alongside non-fire-resistant cables in the same cable tray, install isolation barriers to prevent flame spread during a fire and to comply with electrical design standards regarding separation.
For cables installed in damp cable shafts or underground conduits, use compatible waterproof sealing accessories at terminations; select appropriate cable glands to prevent moisture ingress into the conductor cores.
Use compatible cable terminals for crimping, and ensure reliable insulation wrapping and fire-resistant sealing at the connection points; poor terminal connections can lead to overheating risks during long-term operation under load.
Store finished cables in a dry, well-ventilated warehouse; avoid prolonged exposure to direct sunlight or outdoor stacking to prevent premature aging or embrittlement of the cable sheath.
We manufacture WDZN-YJY cables across a wide range of cross-sections and core configurations. We support customization for non-standard lengths, special sheath colors, and tailored packaging and labeling based on specific drawings, fully meeting the unique design requirements of electrical engineers and project contractors.
We utilize high-purity copper (99.97% purity), premium XLPE insulation, and certified Low-Smoke Zero-Halogen (LSZH) sheath materials. Every batch undergoes internal testing for electrical performance (conductor and insulation resistance) and combustion characteristics (via sampling) prior to warehousing, ensuring consistent quality for large-scale project orders.
We provide a complete documentation package, including factory inspection reports, raw material certifications, combustion test reports, smoke toxicity test reports, and certificates of conformity. We can organize these documents to suit specific stages—such as tendering, project filing, and fire safety inspections—thereby saving procurement teams time on document preparation and qualification verification.
We cater to a wide range of requirements, from small-scale sample trials prior to bulk procurement and medium-batch production of semi-finished goods to large-scale, centralized deliveries for major projects. Partnering with reliable logistics and shipping providers, we arrange door-to-door delivery for domestic projects and offer services such as export packaging, container loading, and customs documentation coordination for overseas orders.
Our technical engineers assist clients with cable selection calculations, current-carrying capacity verification, optimization of installation layouts, preparation of bills of quantities, and technical coordination with design institutes. Additionally, we provide technical consultancy on installation and laying, offering timely support to project teams and helping to resolve technical challenges encountered on-site.
For engineering companies, electrical distributors, and general contractors with ongoing bulk procurement needs, we offer long-term framework pricing, volume discount policies, and quarterly price-locking schemes. These measures help effectively control overall procurement costs and safeguard project budgets against raw material price fluctuations.
