Low-smoke, halogen-free, flame-retardant and fire-resistant cable options for public buildings, transit systems, data centers and critical power circuits.
Representative cable image for LSZH and fire-safe specification review. Final construction is confirmed according to project voltage, route and fire performance requirements.
LSZH and fire-safe requirements are reviewed together with the base cable design, such as low voltage power cables, medium voltage power cables, control cables and building wires. They are not a separate cable system outside the conductor, insulation, screen, armour and sheath structure.
Low-smoke materials, flame-retardant performance and fire-resistant circuit integrity describe different project requirements. Huanyu Cable reviews the requested cable type, installation route, test scope and documentation before confirming availability.
Low-smoke, halogen-free sheath or compound options help reduce smoke density and acidic gas release in occupied or smoke-sensitive spaces. LSZH is a material characteristic, not the same as fire-resistant circuit integrity.
Flame-retardant cable designs are reviewed to limit flame spread along a cable route. Single-cable or bunched-cable test requirements depend on the project specification and confirmed cable construction.
Fire-resistant cable designs focus on maintaining circuit integrity under specified fire conditions. Fire barrier layers, mica tape or other details are confirmed according to the required test scope.
Representative families are shown for initial selection. Exact voltage, construction, sheath compound and fire performance scope are confirmed by project specification.
Low-smoke, halogen-free sheath options for low voltage power distribution cables where project routes require smoke and halogen control.
Unarmoured, STA or SWA designs can be reviewed separately according to the base cable structure and installation route.
Fire-resistant power cable options for critical circuits where circuit integrity is specified and tested by the project requirement.
Building wire options can be reviewed when indoor distribution, lighting or panel wiring requires low-smoke materials.
Control and instrumentation cable requirements can be reviewed where signal or control routes require LSZH or flame-retardant sheath options.
Medium voltage LSZH or fire-safe requirements can be reviewed per project, with screening, armour, sheath and test scope confirmed separately.
| Reference | General meaning | Project review note |
|---|---|---|
| WDZ | Low smoke zero halogen reference | Usually indicates low-smoke, halogen-free material requirements in the Chinese model system, subject to cable construction. |
| ZR | Flame-retardant reference | Usually indicates flame-retardant performance requirements. Test method and flame category are confirmed by project specification. |
| NH | Fire-resistant reference | Usually indicates a fire-resistant design for circuit integrity under specified test conditions. |
| WDZN | LSZH fire-resistant reference | A combined low-smoke, halogen-free and fire-resistant reference, confirmed against the actual cable structure. |
| WDZB / WDZBN | Combined performance references | Can indicate LSZH with flame-retardant or combined LSZH, flame-retardant and fire-resistant requirements where specified. |
| Layer | Specification review scope |
|---|---|
| Conductor | Copper or aluminum conductor according to the base cable design. |
| Insulation | PVC, XLPE or other confirmed insulation material depending on the product family. |
| Fire-resistant layer | Applied where fire-resistant circuit integrity is required, with material and layer design confirmed by test scope. |
| Filling / bedding | Used for multi-core or armoured construction where required by the cable design. |
| Armour | Unarmoured, steel tape armour or steel wire armour selected according to installation requirements. |
| LSZH outer sheath | Low-smoke, halogen-free sheath compound reviewed where the project requires LSZH / LSOH performance. |
Cable requirements reviewed for transit stations, platforms, service routes and equipment rooms.
Low-smoke or fire-resistant cable options for public building power and control routes.
Cable routes where smoke control, power continuity or technical room requirements may apply.
Public infrastructure routes where low-smoke or flame-retardant materials may be specified.
Building power distribution routes with occupant safety and evacuation considerations.
Routes where smoke accumulation and evacuation conditions require careful cable selection.
Fire-resistant circuit requirements reviewed according to the specified system design.
Power and control routes where circuit integrity or low-smoke performance is requested.
No. LSZH or LSOH describes low-smoke, halogen-free material behaviour. Fire-resistant cable focuses on circuit integrity under specified fire conditions.
No. Flame-retardant cable is reviewed to limit flame spread. Fire-resistant cable is reviewed to maintain circuit function under defined fire test conditions.
Armoured cable designs can be reviewed with LSZH sheath requirements. Unarmoured, STA and SWA constructions should be confirmed separately.
They are Chinese model or performance references. Exact meaning depends on the base cable structure, material design and project testing requirements.
Project requirements for metro, healthcare, data center and public building routes can be reviewed against the required cable structure, performance and document scope.
Please send voltage, cable type, conductor, cores, cross-section, LSZH, flame-retardant or fire-resistant requirement, armour, standard, route, quantity and destination.
Medium voltage LSZH or fire-safe requirements can be reviewed per project. MV screening, armour, sheath and test scope must be confirmed separately.
Please include voltage, cable type, conductor material, core number, cross-section, LSZH, flame-retardant or fire-resistant requirement, armour, sheath, project specification, installation route, quantity and destination.
