WDZB-YJY Class B Low Smoke Zero Halogen Flame Retardant XLPE Insulated LSZH Sheathed Power Cable for General Commercial, Residential Public Zones & Standard Public Facilities
製品概要
商品の説明
WDZB-YJY is a standard model within the LSZH flame-retardant power cable series, positioned as a cost-effective LSZH cabling solution. It is suitable for building projects that require basic fire safety and halogen-free properties but do not necessitate enhanced flame retardancy (Class N) or ultra-low smoke emission (Class A) performance. This product fills the market gap between standard halogen-containing PVC cables (Type VV) and high-end WDZBN/WDZA series cables. It meets basic fire safety acceptance criteria for low-rise office buildings, residential public areas, shopping malls, and general public service facilities while effectively controlling overall electrical material costs. It is widely regarded as a standard cable for general public works that complies with mandatory halogen-free requirements.
Mandatory domestic standards:
- GB/T 12706.1
- GB/T 19666 (General requirements for low-smoke, halogen-free cables)
- GB 31247 (Test methods for low-smoke, halogen-free cables)
- GB 50016 (Code for fire protection design of buildings)
- GB 50217 (Code for design of electrical installations of civil buildings)
Corresponding international test standards:
- IEC 60228 (Conductor standards)
- IEC 60332-3 (Vertical flame spread test for bunched cables)
- IEC 61034 (Smoke density measurement)
- IEC 60754 (Halogen gas emission test)
|
Cable Model |
Flame Retardant & Smoke Grade |
Core Applicable Projects |
Relative Material Cost |
|
WDZB-YJY |
Basic Class B LSZH flame retardant |
Low-rise office, residential public zone, retail mall, ordinary community supporting facilities |
Low-Medium |
|
WDZBN-YJY |
Class B enhanced bundle flame retardant |
School, mid-rise commercial complex with strict shaft fire control requirements |
Medium |
|
WDZA-YJY |
Class A ultra-low smoke LSZH |
Super high-rise, subway, large hospital, airport terminal |
High |
|
VV / VLV |
Halogen-containing PVC insulation |
Non-fire-critical ordinary wiring, toxic smoke released when burning |
Low |
- Main universal voltage grade: 0.6/1kV (covers more than 99% indoor fixed distribution engineering of general public buildings)
- Custom special low voltage variant: 0.3/0.5kV, dedicated to small control cabinets, weak current matching auxiliary power supply circuits
- Single-core WDZB-YJY: 1.5mm² ~ 630mm²
- Multi-core WDZB-YJY: 2-core / 3-core / 4-core / 5-core, composite core specifications including 3+1 / 3+2 / 4+1, cross-section range 1.5mm² ~ 400mm² Conductor raw material standard: 99.99% virgin T2 oxygen-free copper, compact stranding process reduces internal conductor clearance, effectively improving actual ampacity under dense laying conditions
- Long-term continuous operating temperature: 90°C (20°C higher than PVC-insulated VV-type cables), supporting higher stable load operation for the same conductor cross-section.
- Short-circuit thermal withstand capability: Withstands a momentary temperature of 250°C for 5 seconds without melting or dielectric breakdown of the insulation layer.
- Class B vertical bunched-cable flame retardancy: Passes the IEC 60332-3B bunched-cable combustion test; flame propagation is controlled within specified limits when multiple cables are laid in a bundle.
- Low-smoke performance (Class B standard): Smoke light transmittance ≥60% during open-flame combustion, ensuring basic visibility for personnel evacuation.
- Halogen-free environmental performance: Total halogen emission <0.5%; does not produce corrosive hydrogen chloride gas that harms the human respiratory tract or firefighting equipment.
- Minimum installation bending radius: 12 times the outer diameter for multi-core cables; 15 times the outer diameter for large-cross-section single-core cables.
- Installation ambient temperature range: -20°C to +70°C; allows for normal pulling and bending installation without preheating in cold winter conditions.
- Routine factory withstand voltage test: All finished cables pass a 3.5kV AC withstand voltage test (duration: 5 minutes), ensuring no insulation breakdown prior to shipment.
- Outer sheath aging resistance: Features long-term UV and mold resistance; suitable for long-term installation in enclosed cable shafts, damp basements, and indoor cable trays.
- Small cross-sections (1.5 mm² – 10 mm²): Corridor emergency lighting, evacuation signage branch circuits, fire alarm control signal lines, and power distribution for sockets in public areas.
- Medium cross-sections (16 mm² – 185 mm²): Main distribution feeders for office floors, standard power supply for retail units in shopping malls, and main circuits for property management equipment in residential complexes.
- Large cross-sections (240 mm² – 630 mm²): Main incoming cables for building distribution rooms and centralized power supply feeders for underground parking garages in residential complexes.
As an entry-level, standardized Low-Smoke Zero-Halogen (LSZH) cable, the WDZB-YJY model omits the high-cost ultra-low-smoke masterbatches and enhanced flame-retardant additives found in the WDZA/WDZBN series, while retaining the fundamental LSZH properties and Class B flame-retardant performance required by national fire safety standards. For low-rise office buildings, residential public areas, and standard retail malls—where strict vertical shaft fire-spread controls are not mandated—selecting WDZB-YJY instead of WDZBN-YJY can reduce cable procurement costs by 25%–35%, helping purchasers optimize the overall electrical material budget for small-to-medium-sized projects while ensuring successful fire safety inspection compliance.
XLPE insulation supports a long-term stable operating temperature of up to 90°C; for a given conductor cross-section, its effective current-carrying capacity is 15% to 22% higher than that of traditional 70°C PVC-insulated (VV-type) cables. When multiple cables are densely installed in indoor cable trays or electrical shafts, this material significantly mitigates the risk of heat accumulation associated with long-term full-load operation. Its design service life of 70 years aligns with the full lifecycle of typical civil buildings, thereby avoiding the additional investment required for mid-term cable replacement or system retrofitting.
Compared to cables featuring heavy PVC sheathing, Low-Smoke Zero-Halogen (LSZH) polyolefin outer sheaths are lighter, moderately flexible, and have less stringent minimum bending radius requirements. Installers can more efficiently handle tasks such as routing cables through wall conduits, navigating turns in cable trays, and performing multi-layer installations. This effectively shortens the electrical installation schedule for large-scale residential complexes and shopping mall renovation projects while reducing labor requirements for the general contractor.
The cable contains no halogenated PVC materials. In the event of an indoor fire, it produces only a small amount of non-toxic white smoke; it does not release corrosive acidic gases that could cause respiratory distress to trapped individuals, nor does it cause permanent corrosive damage to fire alarm systems, smoke exhaust systems, or other fire-linked equipment. It fully meets the basic fire safety design requirements for densely populated public areas.
The WDZB-YJY cable features a low-smoke, zero-halogen (LSZH) outer sheath that offers excellent resistance to moisture, mold, and mild acids or alkalis. It can be installed directly in enclosed indoor cable shafts, basement cable trenches, conduits embedded in walls, or surface-mounted indoor cable trays, eliminating the need for heavy-duty anti-corrosion protective conduits. For electrical infrastructure projects in large residential complexes, this significantly reduces the costs associated with procuring and installing auxiliary protective piping.
WDZB-YJY is a cable model featuring mature low-smoke zero-halogen (LSZH) mass-production technology; its manufacturing process utilizes a standardized LSZH flame-retardant formula and an automated XLPE co-extrusion process. For critical metrics such as smoke density, halogen content, and flame-retardant performance, variations between production batches are strictly controlled within the tolerance limits permitted by national standards, thereby eliminating the risk of failing fire safety inspections due to inconsistent cable quality across batches.
- Low-rise commercial and office buildings (height under 24m)
Standard power distribution risers, emergency lighting circuits for public corridors, power supply for office equipment, and non-critical fire safety circuits in underground equipment rooms - Public amenity areas in residential complexes
Lighting for public corridors in residential buildings, standard power distribution for underground garages, power lines for property management office equipment, and evacuation lighting for community activity rooms - Retail Malls and Dining Establishments
Main power lines for individual retail units; lighting for mall common areas; non-emergency fire-linkage control circuits in basements - General Public Service Facilities
Community health service stations; district-level libraries; municipal public sports arenas; sub-district comprehensive service centers - Electrical Renovation Projects for Older Residential Communities
Replacement of aging cables in common areas; outgoing circuits for basement power distribution boxes; renewal of emergency evacuation lighting circuits in stairwells
The electrical design firm specified WDZB-YJY 0.6/1kV multi-core cables as the main feeders for individual shop power supplies and public area lighting distribution. As the project involved a low-rise commercial building without requirements for ultra-high fire-resistance ratings, the WDZA-YJY (Class A flame-retardant) model was ruled out due to excessive cost, while the WDZBN-YJY (enhanced flame-retardant) model exceeded design specifications, which would have resulted in unnecessary expense. Our company provided comprehensive test certifications confirming Class B flame-retardancy and low-smoke, zero-halogen (LSZH) performance, ensuring the project passed the fire safety authority's inspection on the first attempt without requiring any remedial work. The high current-carrying capacity of the XLPE (cross-linked polyethylene) insulation effectively mitigated heat accumulation issues arising from the dense installation of stacked cable trays in the electrical equipment room; after two years of continuous operation, no overheating or leakage faults have occurred.
The general contractor’s procurement team selected the full range of WDZB-YJY cables for the standard power distribution circuits in the public areas and underground parking garages of all residential buildings. Thanks to the cost-effectiveness of the WDZB-YJY series, total expenditure on electrical materials for the project was 29% lower than it would have been using the WDZBN-YJY alternative. By providing customized, pre-cut cable lengths tailored to the standardized wiring layouts of each building unit, we reduced cable waste by 10%, further optimizing the project budget. Additionally, the cable's lightweight and flexible design significantly improved the efficiency of pulling cables through conduits embedded in the walls of the new structures, accelerating the overall electrical installation schedule by seven working days.
The municipal tender documents for this project explicitly stipulated a basic cabling requirement of "Class B low-smoke, zero-halogen, flame-retardant" specifications; consequently, the design team designated the WDZB-YJY cable model. Our professional electrical engineers assisted the procurement department in compiling the necessary documentation—including CCC mandatory certification, IEC fire safety test reports, and a compliance table for tender specifications—ensuring that all technical parameters fully aligned with the government's evaluation criteria and thereby effectively boosting the bidder's evaluation score. Following project delivery, the fire and rescue authorities conducted on-site combustion spot checks; all metrics—including smoke density, halogen emission levels, and flame-retardant performance—met national standard limits, and the project successfully passed final acceptance.
- Voltage Rating Selection: Standard 0.6/1kV WDZB-YJY cables are to be used for routine indoor fixed installations in low-rise commercial buildings and residential public areas; custom 0.3/0.5kV specifications may be selected for small-scale low-voltage control branch circuits.
- Conductor Cross-Section Calculation: Calculate the required conductor cross-section based on the total equipment load power, incorporating a 10%–15% margin for future load expansion; leverage the high current-carrying capacity of XLPE (cross-linked polyethylene) to avoid the need for oversizing the cross-section (a practice often required for aluminum-core VLV cables).
- Core Configuration Standards: Use 3-core WDZB-YJY cables for single-phase lighting and emergency evacuation indicator circuits; use 4-core cables for balanced three-phase general power feeders; use 3+1 or 4+1 composite-core cables for public equipment requiring independent grounding protection.
- Application-Specific Guidance and Exclusions: WDZB-YJY offers the best cost-performance ratio for standard halogen-free, flame-retardant fire safety installations; Class A WDZA-YJY cables are mandatory for critical evacuation circuits in super-high-rise buildings, metro stations, and large hospitals; WDZBN-YJY (enhanced flame-retardant) cables are recommended for school buildings with dense vertical cable shaft installations; fully enclosed steel conduit isolation is required for installations in highly corrosive chemical workshops.
- Layered installation in cable trays and electrical shafts: A 20% heat dissipation gap must be maintained between bundled WDZB-YJY cables to prevent temperature rise and a reduction in actual current-carrying capacity caused by dense stacking. For vertical installation in shafts, fixing supports must be installed every 1.5 meters to prevent the cable's own weight from stretching and damaging the Low-Smoke Zero-Halogen (LSZH) outer sheath.
- Bending control: Minimum bending radius standards must be strictly observed; excessive bending can cause permanent creases in the LSZH outer sheath, compromising the flame-retardant structure and reducing long-term insulation safety performance.
- Wall penetration protection: Plastic protective bushings must be installed at conduit entry and exit points to prevent sharp metal edges from scratching the outer sheath; excessive tensioning must be avoided during the pulling process to prevent friction-induced damage to the internal insulation layer.
- Low-temperature installation guidelines: The LSZH outer sheath of WDZB-YJY cables retains good toughness at -20°C, requiring no pre-heating before pulling or bending, making it suitable for electrical installation in residential and commercial projects in northern regions during winter.
- Pre-order Qualification Verification: Verify that the supplier can provide the CCC mandatory certification, a third-party test report confirming Class B vertical bunched-cable flame-retardant characteristics, and a test certificate for low-smoke, zero-halogen (LSZH) properties.
- Goods Receipt Spot Checks: Inspect the outer sheath for complete laser-printed markings (e.g., "WDZB-YJY 0.6/1kV + cross-section specification"); check the compactness of the copper core and the uniformity of the XLPE insulation layer thickness. For government tenders and large-scale real estate projects, samples must be taken for third-party spot checks regarding smoke density and flame-retardant performance.
- Delivery Schedule Planning: For large-volume orders—such as those for large residential complexes or commercial complex renovations—orders should be placed 8 to 13 working days in advance. This lead time accounts for raw material production, finished product spot checks, and packaging/shipping, thereby preventing construction delays caused by cable supply shortages.
- Full compliance with domestic standards: All WDZB-YJY cables fully meet the mandatory testing standards for Low-Smoke Zero-Halogen (LSZH) cables (GB 31247) and the requirements of the Code for Fire Protection Design of Buildings (GB 50016); all performance indicators satisfy the review criteria set by construction quality supervision stations and fire rescue agencies.
- International testing qualifications: The products have passed international fire safety tests such as IEC 60332, IEC 61034, and IEC 60754; official test reports are valid for tender submissions for overseas low-rise commercial and residential projects.
- Comprehensive batch documentation provided with delivery: Includes CCC certification, Class B bunched cable combustion (vertical) test reports, LSZH performance inspection sheets, factory batch inspection reports, quality certificates for T2 copper and LSZH flame-retardant plastic raw materials, technical parameter compliance tables for tenders, and special VAT invoices.
- Batch quality consistency control: Each batch utilizes a fixed LSZH flame-retardant masterbatch formula and a standardized XLPE cross-linking production process; batch-to-batch variation in key fire safety indicators is minimal, eliminating the risk of acceptance failure due to non-compliant cable batches.
- We offer a complete product range, spanning from small-gauge 1.5mm² branch cables for evacuation systems to large-cross-section 630mm² trunk cables, while maintaining ample inventory of standard models used in residential and low-rise commercial projects to ensure rapid delivery. Services include on-demand cut-to-length processing, laser printing of project-specific identifiers on the outer sheath, and fire-resistance upgrades using double-layer mica tape for specialized fire safety circuits; this enables one-stop, centralized procurement of standard Low-Smoke Zero-Halogen (LSZH) flame-retardant cables without the need to coordinate with multiple suppliers.
- We exclusively utilize compliant low-smoke, zero-halogen (LSZH) flame-retardant masterbatches and Grade 1 T2 virgin oxygen-free copper, strictly prohibiting the use of substandard recycled halogen-free plastics that fail to meet smoke emission and flame-retardancy standards. We implement a comprehensive four-stage inspection process: halogen and flame-retardancy testing upon raw material arrival; real-time online monitoring of copper conductor stranding; automated thickness measurement during XLPE insulation extrusion; and batch-based vertical bundle burn testing of finished cables. This approach effectively eliminates common quality defects found in products from smaller manufacturers—such as inadequate flame retardancy, excessive smoke generation, and uneven insulation thickness.
- By eliminating intermediaries, we offer tiered volume discounts for bulk orders destined for large residential complexes and commercial developments. Our senior in-house electrical engineers provide complimentary services—including load current calculations, cable cross-section optimization, and indoor cable tray heat-dissipation layouts—to help purchasers select the most cost-effective WDZB-YJY cable specifications while fully meeting essential fire-safety standards, thereby reducing the total investment in electrical materials for public infrastructure projects.
- Our team of engineers, boasting over a decade of experience in electrical design for civil buildings, provides comprehensive technical support to design institutes and general contractors. Services range from consulting on power distribution circuit design for public areas in low-rise mixed-use buildings and providing downloadable current-carrying capacity reference tables for WDZB-YJY cables, to compiling technical compliance documentation for fire safety tenders and offering guidance on preparing materials for fire safety acceptance inspections. For government projects such as libraries and community service centers, we assist in drafting technical specification comparison charts that align with tender requirements, thereby enhancing the competitiveness of contractors' bids.
- Multiple automated continuous XLPE (cross-linked polyethylene) co-extrusion production lines ensure a high daily output of WDZB-YJY cables, supported by extensive on-site warehousing for raw materials, including LSZH (low-smoke, zero-halogen) plastics and copper. Even when handling bulk orders for massive new residential developments or large-scale commercial renovation projects, we guarantee strict adherence to delivery schedules, effectively eliminating the risk of electrical installation work stoppages caused by supply chain shortages.
- All delivered WDZB-YJY cables come with a 15-year manufacturer’s quality warranty covering core fire safety specifications. Should technical challenges arise during indoor installation, a professional technical team is available to provide remote video guidance within 24 hours; furthermore, complimentary hands-on indoor cable installation training can be arranged for long-term real estate developer and commercial contractor partners. Dedicated profiles are established for stable bulk-procurement clients, and raw materials are stockpiled in advance based on project schedules to shorten delivery times for subsequent reorders.
The WDZB-YJY Class B Low-Smoke Zero-Halogen (LSZH) flame-retardant XLPE-insulated power cable is a cost-effective, foundational LSZH cabling solution suitable for low-rise office buildings, public areas in residential complexes, commercial shopping centers, and general public service facilities. This product combines three core competitive advantages: Class B bunched-cable flame retardancy for fire safety, halogen-free and low-toxicity environmental characteristics, and the high current-carrying capacity and heat resistance afforded by XLPE insulation. It strikes a perfect balance between meeting essential halogen-free fire safety compliance standards for civil construction projects and satisfying procurement requirements for overall budget control, while effectively preventing secondary casualties and equipment corrosion caused by toxic smoke during indoor building fires.
As a specialized manufacturer of the WDZB-YJY cable series—certified by China’s CCC and backed by international IEC fire-safety test reports—we provide a comprehensive range of standardized Low-Smoke Zero-Halogen (LSZH) flame-retardant cables, along with complete documentation packages for acceptance and certification, and dedicated technical consulting for civil electrical engineering. We serve global residential developers, commercial building contractors, regional public infrastructure design institutes, and bulk-purchasing teams for small-to-medium-scale projects. Our solutions help public building projects meet essential fire-safety standards, ensuring successful regulatory inspections and construction quality acceptance, while guaranteeing that indoor public power distribution circuits operate safely, cost-effectively, and with minimal maintenance throughout the building's entire lifecycle.
