WDZB1-BYJ Fire resistance WDZB1N-BYJ Building Wire

WDZB1-BYJ/WDZB1N-BYJ Cable Advantages  
EU-Standard Flame Retardancy: Class B1 flame retardant performance meets EU CPR Regulation Class B1ca level, satisfying requirements for high-end international projects  
High Environmental Safety Level: Halogen-free, low-smoke characteristics effectively reduce secondary fire hazards and ensure personnel escape safety  
Excellent Electrical Performance: Cross-linked polyethylene insulation offers high temperature resistance, high current-carrying capacity, and long service life  
Strong Fire Resistance Reliability: Type N maintains circuit integrity during fires, buying valuable time for critical equipment power supply  
High Adaptability: Class B1 flame retardant is suitable for most medium- to high-risk building locations  

WDZB1-BYJ/WDZB1N-BYJ Cable Selling Points  
High-End Flame-Retardant Cable Meeting International Standards: Class B1 flame retardant complies with EU CPR regulations and can be directly used in high-end foreign-related projects  
Preferred Cable Material for Green Buildings: Halogen-free, low-smoke characteristics meet international green building certification requirements such as LEED and BREEAM  
Comprehensive Safety Solution for All Scenarios: Class B1 flame retardant plus fire-resistant type covers various building scenarios including commercial, public, and transportation facilities  
Long-Lifespan and Economical Choice: Cross-linked polyethylene insulation resists aging, with a design lifespan of over 30 years, reducing full-cycle costs  
Complete Compliance Assurance: Passes domestic CCC and international CPR-related tests, with complete supporting reports  

WDZB1-BYJ/WDZB1N-BYJ Cable Application Scope  
High-End Commercial Buildings: Power distribution lines for five-star hotels, Class A office buildings, and luxury commercial complexes  
Public Transportation Hubs: Power distribution in public areas of international airports, high-speed rail stations, and subway stations  
Cultural and Educational Facilities: Power distribution systems for museums, libraries, and university research buildings  
Medical and Elderly Care Institutions: Power distribution in ward areas of top-tier hospitals and public areas of nursing homes  
Foreign-Related Engineering Projects: Power distribution for foreign-funded factories, international schools, and embassy district buildings  
Compliance Certifications: CCC/ROHS; Class B1 flame retardant passes GB 31247 test (equivalent to EN 50399); fire-resistant type passes GB/T 19666 test

Conductor:Annealed copper conductor (Class 1 or 2), with a cross-sectional range of 1.5 mm² to 400 mm².
Insulation Material:  Cross-linked polyethylene (XLPE), formulated to be halogen-free, low-smoke, and flame-retardant.
Rated Voltage:450/750V
Long-Term Allowable Operating Temperature: 90°C
Combustion Performance Rating: Class B1 – This is its core identifier, and it must pass all stringent tests specified in GB 31247.
Flame Retardant Characteristics:  Passes the severe condition tests of IEC 60332-3 (bundle flame test), equivalent to or exceeding traditional Class A flame retardancy.
Halogen-Free Characteristics: Complies with GB/T 17650.2; combustion products exhibit a pH ≥ 4.3, conductivity ≤ 10 μS/mm, and extremely low corrosiveness.
Low-Smoke Characteristics: Complies with GB/T 17651.2; smoke density (light transmittance) ≥ 80% (exceeding the 60% requirement for ordinary WDZ cables).
Heat Release Rate: Total heat release (THR) and peak heat release rate (pHRR) must remain below the Class B1 limits, which are critical for controlling fire spread.
Burning Dripping: No burning droplets that ignite filter paper (i.e., "no dripping"), preventing the ignition of items below.
Smoke Toxicity:  Must achieve the safety level (Class t1) specified in GB 31247, ensuring that smoke toxicity does not incapacitate personnel within a short period.
Minimum Bending Radius:  During installation: ≥ 6×D (cable outer diameter)
WDZB1N-BYJ: Fire Resistance