# LSZH CABLES URL: https://www.chinneelectric.com/products-types/lszh-cables/ Brand: Chinne Electric ## Summary Chinne Electric A trusted factory-direct supplier for all your Low Smoke Halogen Free (LSZH) fire retardant cable needs. Benefits of LSZH fire retardant cables. CHINNE LSZH is the best cable choice for enhanced fire safety in public places like hospitals, schools, and offices. They produce less smoke and no toxic halogen gases when burned, enhancing visibility and reducing the risk of toxic inhalation, facilitating the evacuation of people in the event of a fire. ## Key facts - CHINNE LSZH is the best cable choice for enhanced fire safety in public places like hospitals, schools, and offices. - They produce less smoke and no toxic halogen gases when burned, enhancing visibility and reducing the risk of toxic inhalation, facilitating the evacuation of people in the event of a fire. - Benefits of LSZH fire retardant cables - A trusted factory-direct supplier for all your Low Smoke Halogen Free (LSZH) fire retardant cable needs ## FAQ ### How do Chinese (GB) and International naming conventions for LSZH cables differ? In the international market, LSZH cables are typically categorized by harmonized codes (like the European <HAR> system) or specific material designations (e.g., H07Z-K). The Chinese system utilizes the GB (Guobiao) standard, which relies on Pinyin initials to denote smoke and halogen properties. Chinese System (GB/T): Common models use the prefix WDZ (Wuyan Dizhou - Low Smoke Low Halogen) or WDZN (Fire Resistant version). Examples include WDZ-YJY (XLPE insulation, LSZH sheath) and WDZ-BYJ (LSZH insulated wire). International System: Common designations include H05Z-K / H07Z-R (Harmonized single core), NHXH (Fire resistant LSZH), and SOOW (equivalent oil-resistant versions). In the North American market, they may be labeled as LS (Limited Smoke) according to UL standards. ### Why are different naming standards compatible for use in the international market? Compatibility is based on standardized testing protocols rather than the name itself. Regardless of whether a cable is called WDZ-YJY or H07Z-R, it must pass the same critical global tests: IEC 61034: Measurement of smoke density (ensuring visibility). IEC 60754-1/2: Determination of halogen acid gas content and acidity (ensuring non-toxicity). IEC 60332: Tests on flame propagation. As long as the cable meets these IEC (International Electrotechnical Commission) benchmarks, it is functionally compliant for global infrastructure projects. ### What exactly makes a cable "Low Smoke Zero Halogen"? LSZH cables are constructed using thermoplastic or thermoset compounds that do not contain halogens (such as Fluorine, Chlorine, Bromine, or Iodine). In standard PVC cables, these halogens release toxic, corrosive gases like Hydrogen Chloride (HCl) when burned. LSZH materials instead use mineral fillers like Aluminum Trihydrate (ATH), which release water vapor when heated to suppress smoke and heat. ### What is the difference between LSZH, LSOH, and LSHF? These terms are essentially interchangeable in the international market: LSZH: Low Smoke Zero Halogen (most common). LSOH / OHLS: Low Smoke Zero Halogen / Zero Halogen Low Smoke. LSHF / NHFR: Low Smoke Halogen Free / Non-Halogen Flame Retardant. All these designations point to the same safety goal: reducing toxic fumes and maximizing visibility during fire emergencies. ### In which applications is LSZH cabling mandatory? LSZH cables are mandated by building codes in the international market for areas with high concentrations of people or sensitive equipment, including: Public Infrastructure: Underground subways, tunnels, and airports. Commercial Buildings: Data centers, high-rise offices, and hospitals. Maritime: Offshore oil rigs and naval vessels (where evacuation is difficult). ### Does an LSZH jacket affect the electrical performance of the cable? The LSZH compound primarily affects the mechanical and fire-safety properties of the outer sheath. The electrical performance (voltage rating, capacitance, and conductivity) is determined by the internal conductor and primary insulation (like XLPE). Therefore, an LSZH power cable performs identically to a PVC version electrically but offers vastly superior safety in fire conditions. ### What are the mechanical limitations of LSZH cables compared to PVC? While LSZH is superior for safety, it can be slightly more rigid than PVC. Pros: Better UV resistance and higher environmental safety. Cons: LSZH jackets can be prone to "stress cracking" if installed incorrectly or exposed to specific harsh chemicals. It is vital to adhere to the minimum bending radius specified by the manufacturer during installation. ### How should LSZH cables be supported and laid in industrial facilities? To maintain the integrity of LSZH systems, high-quality support structures are required: Cable Trays: Perforated trays are ideal for heat dissipation. Wire Mesh Cable Trays: Excellent for light-duty data and control cables, allowing for easy routing and high visibility. Cable Ladders: Best for heavy-duty armored LSZH power cables that require maximum mechanical support over long spans. ### Can LSZH cables be used for outdoor or direct burial applications? Standard LSZH compounds are designed for indoor use. However, for the international market, we offer UV-stabilized LSZH or Steel Wire Armored (SWA) versions. For direct burial, a cable must have an additional water-resistant barrier or specialized jacket to prevent moisture from degrading the halogen-free compound. ### How does the "Bending Radius" impact the installation of LSZH cables in Trunking? When laying LSZH cables in Steel or PVC Trunking, installers must be careful. Because LSZH is less "forgiving" than PVC, exceeding the bending radius (typically 8x to 12x the Outer Diameter) can cause micro-fractures in the jacket. Using large-radius elbows and bends within the trunking system is recommended. ### What is the significance of the "Acidity Test" (IEC 60754-2)? This test measures the pH and conductivity of the gases produced during combustion. In data centers, this is critical because acidic gases from burning PVC can corrode expensive circuit boards and server components even if the fire itself is small. LSZH cables pass this test, ensuring your hardware is protected from corrosive damage. ### Are LSZH cables also Fire Resistant (Circuit Integrity)? Not necessarily. LSZH (Flame Retardant) prevents the spread of fire and smoke. Fire Resistant (Circuit Integrity) cables (tested to IEC 60331) are designed to keep the power on during a fire. However, most high-quality fire-resistant cables are also LSZH to ensure total safety. ### How do I calculate the "Cable Fill Ratio" for LSZH cables in Cable Trays? According to international standards like NEC or IEC 60364, you should generally not exceed a 40-50% fill ratio in cable trays or trunking. This ensures adequate airflow to prevent heat buildup, which is especially important for LSZH cables to maintain their physical properties over a 25-year service life. ### Is LSZH more expensive than standard PVC cabling? Historically, LSZH was significantly more expensive. However, due to increased production for the global market and stricter safety regulations, the price gap has narrowed. When considering the Life Cycle Cost (LCC) and the reduction in potential fire damage to equipment, LSZH is a more cost-effective choice for modern infrastructure. ### How do I verify the authenticity of an LSZH cable? Genuine LSZH cables will have the relevant standards (e.g., BS EN 50267 or IEC 61034) printed directly on the jacket. Professional buyers often request a Burn Test Report or a Certificate of Compliance (CoC) to verify that the halogen content is indeed below the 0.5% threshold required for a "Zero Halogen" rating. ### Can I buy CHINNE LSZH cables with black outer sheath? Yes, although in Chinese the standard outerh sheath for LSZH cables colour is green, in other countries this cable can be supplied with a black outer sheath. ### What are the benefits of a LSZH cable? Halogen free cables with reduced smoke production save lifes in the event of a fire: • Provide a smoke-free escape route • Protect the structure of the building • Limit the smoke damages to equipment • The smoke is less hot and non-corrosive • Facilitate the work of firefighters in the building