Halogen-Free Low-Smoke Mica Tape Fire Resistant Power Cable
LSZH Fire Resistant Cable (WDZN)
Factory-direct WDZN halogen-free low-smoke fire resistant cable for metro, hospital and high-occupancy buildings
WDZN series combines a mica tape fire barrier with a halogen-free low-smoke sheath, so the circuit stays energised during a fire while releasing very little smoke and no corrosive acid gas. This matters in enclosed, high-occupancy spaces where smoke inhalation and equipment corrosion cause more damage than the flame itself — metro tunnels, hospital operating theatres, airport terminals and underground car parks. Available with XLPE insulation (WDZN-YJV / WDZN-YJY) or PVC insulation (WDZN-VV), 0.6/1 kV through 26/35 kV.
Key features
- Mica tape fire barrier over the conductor
- Halogen-free low-smoke sheath — no corrosive acid gas when burning
- XLPE (WDZN-YJV / WDZN-YJY) or PVC (WDZN-VV) insulation
- Flame retardant to IEC 60332-3 grade A/B/C
- Available 0.6/1 kV through 26/35 kV
- Copper or aluminium conductor, class 1 / 2 / 5
Typical applications
- Metro and rail tunnel emergency circuits
- Hospital operating theatres and ICU distribution
- Airport terminal and station concourse wiring
- Underground car park and basement plant rooms
- Data centre and control room supplies
- Shopping centre and stadium distribution
WDZN-VV — 0.6/1 kV, Copper, Mica Tape + PVC, Five-Core, Unarmoured
Source: Huanghe factory technical data sheet (enquiry TDS “2026.04.23 0.6kV WDZN-VV”) — values as supplied
These figures come from a stamped factory data sheet, not from the printed catalogue. Mica barrier 0.14 mm (0.1 mm on 5×2.5). 70 °C conductor temperature — this is the PVC insulated build; see the XLPE table below for 90 °C.
Custom sizes available on request — send us your project specification.
| Cores × Section (mm²) | Overall Dia. (mm) | Weight (kg/km) | Current — In Ground (A) | Current — In Air (A) | Max. DC Resistance at 20 °C (Ω/km) |
|---|---|---|---|---|---|
| 5×2.5 | 12.5 | 225 | 35 | 30 | 7.41 |
| 5×4 | 15 | 310 | 50 | 40 | 4.61 |
| 5×6 | 16.4 | 410 | 60 | 50 | 3.08 |
| 5×10 | 20.3 | 640 | 80 | 65 | 1.83 |
| 5×16 | 23 | 950 | 100 | 85 | 1.15 |
| 5×25 | 27.3 | 1450 | 130 | 115 | 0.727 |
| 5×35 | 29.9 | 1880 | 155 | 145 | 0.524 |
| 5×50 | 32 | 2509 | 185 | 175 | 0.387 |
| 5×70 | 36 | 3570 | 225 | 220 | 0.268 |
| 5×95 | 40 | 4802 | 270 | 270 | 0.193 |
| 5×120 | 43 | 6162 | 305 | 315 | 0.153 |
WDZN-YJV — 0.6/1 kV, Copper, Mica Tape + XLPE, Solid Class 1 Conductor
Source: Huanghe factory technical data sheet (enquiry TDS “12.1 WDZN-YJV”) — values as supplied
Quoted against a solid class 1 conductor at the customer's request. Mica barrier 0.14 mm. Stranded class 2 gives different overall diameter — confirm conductor class on your order.
| Cores × Section (mm²) | Overall Dia. (mm) | Weight (kg/km) | Current — In Ground (A) | Current — In Air (A) | Max. DC Resistance at 20 °C (Ω/km) |
|---|---|---|---|---|---|
| 2×1.5 | 8.6 | 75 | 25 | 30 | 12.1 |
| 3×1.5 | 9 | 88 | 25 | 30 | 12.1 |
| 2×2.5 | 9 | 110 | 30 | 35 | 7.41 |
| 3×4 | 11 | 183 | 40 | 50 | 4.61 |
WDZN-YJV — 0.6/1 kV, Copper, Mica Tape + XLPE, Four-Core Plus Neutral
Source: Huanghe factory technical data sheet (enquiry TDS “7.24 WDZN-YJV 5+1类型”) — values as supplied
| Cores × Section (mm²) | Overall Dia. (mm) | Weight (kg/km) | Current — In Ground (A) | Current — In Air (A) | Max. DC Resistance at 20 °C (Ω/km) |
|---|---|---|---|---|---|
| 4×80+1×50 | 35.0 | 3800 | 225 | 220 | 0.215/0.387 |
| 4×100+1×70 | 37.0 | 4450 | 270 | 270 | 0.183/0.268 |
| 4×240+1×120 | 55.5 | 10670 | 500 | 455 | 0.0754/0.153 |
WDZN-YJY23 — 0.6/1 kV, Copper, Mica Tape + XLPE, Steel Tape Armoured, LSZH Sheath
Source: Huanghe factory technical data sheet (enquiry TDS “9.30 0.6/1kV WDZN-YJY23”) — values as supplied
Single-core armoured build with halogen-free polyethylene outer sheath (23).
| Cores × Section (mm²) | Overall Dia. (mm) | Weight (kg/km) | Current — In Ground (A) | Current — In Air (A) | Max. DC Resistance at 20 °C (Ω/km) |
|---|---|---|---|---|---|
| 1×120 | 22.4 | 1810 | 360 | 335 | 0.153 |
| 1×240 | 28.9 | 3030 | 535 | 535 | 0.0754 |
Need a voltage class, core count or sheath not listed above?
The WDZN range covers 0.5–1000 mm² at 0.6/1 kV and 35–1000 mm² for medium voltage (3.6/6, 6/10, 8.7/15, 12/20, 18/30, 26/35 kV), in 1, 2, 3, 4, 5, 3+1, 3+2 and 4+1 core builds, unarmoured / steel tape armoured (22) / steel wire armoured (32), with LSZH or PE sheath. Send us the cores, cross-section, voltage, armour type and destination port for a stamped data sheet.
LSZH Fire Resistant Cable (WDZN) gallery
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Frequently asked questions about LSZH Fire Resistant Cable (WDZN)
Q.What does WDZN stand for?
It is a stacked Chinese type code: WD is halogen-free (无卤), Z is flame retardant (阻燃), N is fire resistant (耐火). So WDZN-YJV is a halogen-free, flame retardant, fire resistant XLPE cable. WDZ without the N is halogen-free flame retardant only — it limits flame spread but does not keep the circuit alive.
Q.What is the difference between WDZN-VV and WDZN-YJV?
Insulation. VV is PVC insulated with a 70 °C conductor rating; YJV is XLPE insulated with a 90 °C rating, so it carries more current at the same cross-section. Both use the same mica tape fire barrier and halogen-free sheath.
Q.Is LSZH the same as fire resistant?
No, and they are often confused. LSZH describes what the sheath emits when it burns — little smoke, no halogen acid gas. Fire resistant (the N in WDZN) describes whether the circuit keeps working during the fire, which comes from the mica tape barrier. A cable can be LSZH without being fire resistant, and vice versa.
Q.Do you supply medium voltage LSZH fire resistant cable?
Yes. WDZN-YJY and WDZN-YJLY cover 3.6/6, 6/10, 8.7/15, 12/20, 18/30 and 26/35 kV in 35–1000 mm², single-core and three-core, with copper tape screen and optional armour. Send your voltage and cross-section for a data sheet.
Q.What are the MOQ and lead time?
MOQ is 500-1,000 metres per size for standard constructions, or 2,000-5,000 metres for custom specifications. Lead time is 10-15 days depending on drum quantity and stock. LSZH compound is made to order for larger volumes, so send your cable schedule early for a firm date.
Q.What packaging do you use for export?
Wooden drums for export, marked with cable type, cross-section, length and your shipping marks. Typical drum lengths are 100 m, 200 m, 500 m or 1000 m.
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Read guide →Ready to source LSZH Fire Resistant Cable (WDZN) from the factory?
Send your specs — voltage rating / conductor size / cores / armour / length / destination port. Quote within 24 hours.