Flame Retardant 4mm WDZ-BYJ Cable 450/750V Halogen Free Low Smoke

Low Smoke · Zero Halogen · Flame-Retardant · 90°C Rated — Safer wiring for modern buildings

When wiring runs through crowded public spaces, vertical shafts, tunnels, and equipment rooms, the biggest danger in a fire isn’t only flame—it’s smoke density and corrosive/toxic gases. WDZ-BYJ is designed for projects that want a safer evacuation environment and better protection for sensitive equipment, using LSZH (Low Smoke Zero Halogen) cross-linked polyolefin insulation plus flame-retardant performance for building wiring.

In a fire, LSZH materials are built to reduce smoke and avoid halogen acid gases, improving visibility and helping protect electronics and metal infrastructure from corrosive combustion products.

WDZ-BYJ is commonly supplied as a 90°C heat-resistant building wire (compared with many standard PVC building wires), supporting stable operation in warmer conduits, shafts, and high-load distribution zones.

Projects often specify different flame-retardant grades (commonly referenced as WDZA / WDZB / WDZC) depending on installation density and fire-safety requirements.

LSZH building wire is frequently selected for public buildings, transportation hubs, underground spaces, and high-occupancy projects where smoke/toxicity control is a priority.

Product name: WDZ-BYJ LSZH Flame-Retardant Building Wire
Typical voltage rating: 450/750V (AC) (project-dependent)
Typical conductor: annealed copper, single solid or stranded (selection by cross-section)
Insulation: cross-linked polyolefin LSZH compound
Key value: lower smoke + halogen-free + flame-retardant performance for safer building wiring

Notes for buyers: Actual compliance tests (smoke density, halogen acid gas, toxicity, bundling flame tests) should match your local code + project acceptance criteria. LSZH ≠ automatically “fire-resistant”—specify the exact flame/fire performance you need.

WDZ-BYJ naming is commonly explained as:

• WD = low-smoke, halogen-free (LSZH)
• Z = flame-retardant
• B = building wire
• YJ = cross-linked polyolefin insulation

• High-rise residential & commercial towers (shafts, risers, corridors)
• Hospitals, schools, malls, stadiums (high occupancy)
• Metro, tunnels, underground utility corridors (smoke control critical)
• Data rooms and equipment-heavy floors (reduced corrosive gas risk)

• Lighting and socket circuits
• Building distribution branches
• Control wiring for building automation (where LSZH is specified)

Send these details to get a precise quote:

1. Model: WDZA-BYJ / WDZB-BYJ / WDZC-BYJ
2. Voltage: 450/750V
3. Conductor size (mm²) + structure (solid/stranded)
4. Color requirements (phase ID)
5. Packaging: coils or reels + length per roll
6. Destination country + project type (to match documentation needs)

• Factory routine test report
• Flame-retardant grade test evidence (per specified class)
• LSZH-related test documentation as required for acceptance (smoke/halogen gas, etc.)

Q1: What is WDZ-BYJ used for?
It’s a LSZH flame-retardant building wire typically used for 450/750V building wiring in conduits, shafts, and indoor distribution where smoke/toxicity control is important.

Q2: Is LSZH the same as fire-resistant?
Not necessarily. LSZH focuses on low smoke + no halogen corrosive gases; fire resistance is a separate requirement. Specify the exact standard and test you need.

Q3: What does WDZA / WDZB / WDZC mean?
They are commonly used to indicate different flame-retardant performance levels. Choose based on route density and the project’s fire code.

Q4: What’s the operating temperature rating?
WDZ-BYJ is commonly supplied as a 90°C heat-resistant building wire type.

Q5: Why choose LSZH wire in public buildings?
Because lower smoke and reduced corrosive gas release can improve evacuation visibility and reduce secondary damage to equipment during a fire.

Q6: Can WDZ-BYJ be used in tunnels or metro projects?
It is commonly listed for use in facilities such as tunnels and transit-related infrastructure (subject to project code and acceptance tests).

Q7: What information do you need for an accurate quotation?
Flame-retardant grade (ZA/ZB/ZC), conductor size, insulation spec, color set, roll length, and destination country (for required documents).

Service of JinHong Company

Over Productions Service: 

JinHong has a wide range of cable and conductor products for you to choose from. We will provide caring services and professional project solutions for everyone who needs them.

Quality Certification Services:

 JinHong cable products are manufactured according to GB, IEC, BS, NFC, ASTM, DIN, and other international standards. Our technical team can customize cable products that meet your requirements according to your needs.

Profession Customer Service:

JinHong provides free professional consulting services to provide you with one-stop project solution services and rapid product delivery solutions.

Delivery And Shipping Services:

While we at JinHong provide high-quality cables, we also provide good delivery solutions. While ensuring the safe delivery of products, we provide the best packaging and transportation solutions, greatly reducing customers’ transportation costs.

Packaging of JinHong:

JinHong cable packaging is provided in the form of wooden reels, corrugated boxes, and coils. The cable ends are sealed with BOPP self-adhesive tape and a non-hygroscopic sealing cap to protect the cable ends from moisture. We can print the required marks on the outside of the barrel with waterproof material according to customer requirements.