WDZB-YJY Low Voltage 0.6/1kV LSZH Class B Flame Retardant Power Cable | Non-Armoured XLPE Building & Industrial Distribution Cable

WDZB-YJY is a widely used unarmored low-voltage fixed wiring cable with a rated voltage of 0.6/1kV. It is formulated with low-smoke halogen-free polymer compounds and has Class B flame retardant properties. It is specifically developed to meet the low-voltage backbone power distribution requirements of fire-resistant buildings.

WDZ:

Low-smoke halogen-free; all insulation layers, inner fillers, and outer sheaths are made of halogen-free environmentally friendly compounds without PVC halogen additives.

B:

Class B flame retardant; passes the international standard multi-core vertical burning test.

YJ:

Copper conductors use cross-linked polyethylene extruded insulation.

Y:

Modified low-smoke halogen-free extruded outer sheath.

Unlike armored medium-voltage cables and traditional halogen-containing YJV cables, this product eliminates the metal armor layer, featuring a compact outer diameter, light weight, and convenient field wiring. It is the standard cable type specified for green buildings, public infrastructure, and modern factory power distribution systems. The product range covers single-core, 3-core, 4-core, 5-core, and asymmetrical combination cores, including various core structures such as 3×N+1, 3×N+2, and 4×N+1, to match the diverse low-voltage power distribution circuit design schemes of electrical design institutes.

Rated Operating Voltage:

U0/U=0.6/1kV, suitable for 50Hz AC civil and industrial low-voltage power grids;

Permissible Long-Term Continuous Operating Temperature of Copper Conductor:

90℃ under full load;

Short-Circuit Thermal Resistance:

Maximum permissible instantaneous temperature reaches 250℃ within 5 seconds of short-circuit duration;

Factory Routine Withstand Voltage Test:

3.5kV power frequency withstand voltage for 5 minutes without insulation breakdown;

XLPE Insulation Performance:

Ultra-low dielectric loss factor, stable insulation resistance under high humidity and alternating temperature environments, effectively reducing active power consumption in long-distance lines.

Conductor Standards:

Class 2 tightly stranded annealed copper conductors conforming to IEC60228 and GB/T3956 standards. The tightly stranded structure ensures a smooth conductor surface, avoiding localized electric field concentration.

Standard Specifications:

Conductors with cross-sections ranging from 1.5mm² to 300mm² are available in stock. Custom-made conductors with cross-sections from 400mm² to 630mm² and non-standard special core layouts can be customized according to customer-provided electrical construction drawings.

DC Resistance Control:

The DC resistance of the finished conductor at 20℃ is strictly controlled below the standard upper limit, optimizing voltage drop in long-distance transmission lines.

XLPE Insulation Layer:

High-purity chemically cross-linked polyethylene material, produced using a continuous extrusion process, with uniform wall thickness and excellent resistance to electrical aging and puncture.

Halogen-Free Flame-Retardant Filler:

Environmentally friendly flame-retardant filler wraps around the cable profile, eliminating internal voids and improving overall fire-resistant bundling performance.

Modified Low-Smoke Halogen-Free Outer Sheath:

UV-resistant and hydrolysis-resistant modified halogen-free composite material, possessing good moisture resistance and indoor corrosion resistance.

Minimum ambient temperature for fixed installation:

≥0℃;

Minimum bending radius during installation:

≥12 times the outer diameter of the finished cable;

Applicable laying altitude:

≤3000m. No parameter reduction is required for normal use. Projects at altitudes above 3000m require a customized high-altitude enhancement formula.

• Class B Bundling Flame Retardant Performance: Passes IEC60332-3 and GB/T19666 Class B bundling combustion tests. When dozens of cables are densely laid in a cable tray, it effectively limits the spread of flames and slows the spread of fire along the wiring channel.
• High-Quality Low-Smoke Halogen-Free Safety Performance: Smoke penetration exceeds 68% in standard combustion tests. It does not produce corrosive halogen acid gases in a fire, effectively protecting precision electrical equipment inside buildings and ensuring escape visibility in enclosed basements and cable shafts.
• Stable Cross-linked Polyethylene Insulation Electrical Reliability: Minimal capacitance change under fluctuating grid loads ensures stable operation and long-term uninterrupted power supply to critical loads.
• Lightweight Unarmored Structure Advantages: The metal-free armored design reduces the overall size and unit weight of the cable, saving on the procurement costs of cable trays and ducts, and saving on installation space.
• Long lifespan and anti-aging performance: The optimized low-smoke halogen-free (LSZH) sheath formula resists indoor humid environments and mild chemical volatile corrosion, with a designed service life of up to 25 years under standard operating conditions.

• Full-layer halogen-free environmental upgrade: Traditional YJV cables use halogen-containing PVC sheaths, which produce toxic and corrosive fumes when burned; WDZB-YJY's all-non-conductive components use a halogen-free formula, complying with LEED green building standards and international fire protection certification;
• Optimized fire-resistant formula for dense installation: The specially formulated flame-retardant inner core filler improves the overall fire resistance under dense installation, making it ideal for dense wiring in large commercial complexes;
• Flexible customized production system: Supports small-batch trial orders, customized irregular core wire combinations, and mixed specification consolidated shipments, helping customers reduce inventory backlog costs;
• Full-process online quality monitoring: The automated continuous extrusion production line is equipped with real-time thickness detection equipment. Each batch of finished products undergoes smoke density and flame retardancy sampling tests before entering the warehouse to ensure batch consistency.

• High-rise Commercial and Residential Building Projects: Main power lines, shaft cabling, and underground parking garage power distribution lines in central business district shopping malls, Grade A office buildings, and high-end residential communities must meet the mandatory low-smoke, halogen-free, and flame-retardant requirements of local fire departments;
• Medical and Public Service Infrastructure: Indoor low-voltage trunk cabling in general hospitals, disease control and prevention centers, and municipal comprehensive stadiums; centralized cabling in enclosed equipment rooms; priority cables designated for Class I fire protection construction;
• Modern Industrial Parks and Factory Renovation: Indoor power distribution lines in new energy manufacturing workshops and food processing industrial parks; dense cabling in factory cable bridges; adaptable to the slightly volatile chemical environment in production workshops;
• Transportation Support Construction: Auxiliary power distribution in high-speed rail stations; underground power cabling in urban comprehensive transportation hubs; fixed laying projects in enclosed passages that meet strict fire protection standards.

• Shaft Cabling Tips: For dense wiring in high-rise building shafts, prioritize WDZB-YJY Class B version to meet local fire inspection requirements for bundled flame-retardant technology;
• Basement Enclosed Space Laying Tips: Ordinary PVC cables are prohibited in underground parking lots and enclosed equipment rooms. Select full LSZH WDZB-YJY to meet fire safety acceptance requirements;
• Factory Workshop Environment Tips: When trace amounts of acidic or alkaline volatile gases are present in the workshop, select upgraded anti-corrosion sheaths to extend cable life;
• High Altitude Construction Tips: For projects in high-altitude areas, use customized low-voltage resistant insulation formulas to avoid insulation performance degradation caused by thin air.

Multi-dimensional audit focus for EPC procurement managers, local electrical distributors, and construction contractors:

• Raw Material Source Verification: Suppliers are required to provide factory testing certificates for low-smoke halogen-free (LSZH) raw materials before signing bulk orders, confirming that the cables contain no recycled or inferior mixed materials.
• Pre-shipment Third-Party Testing Agreement: Sampling inspection clauses are included in the sales contract, supporting random sampling tests for flame retardancy and smoke density by a designated third-party laboratory before container shipment.
• Specification Matching Confirmation: Project electrical drawings and installation environment descriptions are submitted to our technical department in advance. Our senior electrical engineers will optimize the cross-section and core wire layout to avoid on-site rework due to incorrect procurement models.
• Delivery Cycle Planning: Standard mainstream specifications are readily available from the factory, enabling rapid delivery within 5-7 working days. For non-standard customized products, the production cycle is confirmed during the pre-purchase negotiation stage to coordinate with the overall project construction schedule.
• Export Packaging Optimization: Export-specification cables are packaged in moisture-proof wooden rolls. Our logistics team optimizes container loading layout to improve space utilization and reduce unit sea freight costs for bulk importers.

WDZB-YJY series products have all passed authoritative standard testing and can provide complete certification documents for overseas bidding and customs clearance at the port of destination:

• Domestic Standard Compliance: Complies with GB/T12706 Low-voltage Power Cable Standard and GB/T19666 Flame-retardant Cable Specification;
• International Standard Compliance: Complies with the core clauses of IEC60502, IEC60332, and IEC61034, matching the electrical access standards of major countries in Southeast Asia, the Middle East, and Africa;
• Complete Qualification Documents: CCC mandatory certification, fire-resistant product type approval certificate, CNAS authorized laboratory test report, ISO9001 quality management system certification, and ISO14001 environmental management system certification. Complete English versions of certification documents are available for overseas bidding;
• Customs Support Services: Assists buyers in issuing certificates of origin and customs clearance support documents, shortening customs clearance time at the port of destination.

• Professional Pre-sales and After-sales Technical Support: A team of senior low- and medium-voltage electrical engineers provides free pre-order specification selection consultation, customized wiring suggestions based on project drawings, and remote online technical communication for construction teams;
• Strict Full-Process Quality Traceability: Each production reel has a unique batch number, covering raw material inspection, production monitoring, and finished product testing, facilitating full-process quality traceability after project acceptance;
• Diverse International Trade Terms Support: Accepts various trade terms such as FOB/CIF/CFR, supports a dual cooperation model of small trial orders + annual long-term framework contracts, and long-term cooperative clients enjoy tiered bulk purchase discount policies;
• Stable production and logistics arrangements: Maintaining real-time inventory of core standard sizes at the factory, and collaborating with multiple globally renowned freight forwarders to develop cost-effective transportation solutions, avoiding delivery delays caused by port congestion;
• Supplementary order reserves: Reserving some production capacity for cooperative engineering clients to quickly respond to temporary and urgent additional order needs during the later stages of project construction.