BTTZ Mineral Insulated Fire-Resistant Cable Product Details The "Flexible Fire Barrier Flame Retardant Fire-Resistant Wire and Cable," independently developed by the group in 2009, received an exclusive invention patent certificate from the National Intellectual Property Administration in 2013. Since its full promotion and market launch in 2013, the product has been widely acclaimed by users. Applications: 1. Power supply for firefighting equipment and fire elevators in various buildings; 2. Power supply for equipment and lighting systems in important or densely populated buildings, such as convention centers, exhibition centers, hotels, airports, hospitals, shopping malls, parking lots, and other urban complexes; 3. Power supply for equipment in environments with high temperatures, such as steel plants, smelters, and glass factories; 4. Power supply for equipment in flammable and explosive critical locations, such as petrochemical plants and coal mines; 5. Power supply for equipment in places requiring high cleanliness and hygiene, such as hospitals and food factories; 6. Power supply for critical military, defense, aerospace, and satellite base equipment; 7. Power supply for essential equipment in power plants and nuclear power stations; 8. Power supply for modern rail transit lines, such as subways, high-speed rails, and light rails. Key Features and Advantages: 1. Flexibility: The cable conductors use mature stranding technology, and the sheath is made of specially processed soft copper, providing resistance to mechanical impact and flexible bending. This avoids the common issues of terminal connections and delivery lengths encountered with rigid mineral insulated cables like BTTZ. 2. Fire Resistance: Both the conductor and sheath are made of copper, with a melting point of 1080°C. The insulation and other auxiliary materials use minerals with a melting point as high as 1375°C or above, enabling the product to meet GB12666.6 and BS6387 standards. 3. Low Smoke: Smoke emission tests according to IEC1034 and GB/T17651.2-1998 show that the light transmittance exceeds 80% (standard is 60%) when measuring smoke density under specific conditions. 4. Halogen-Free: As the mineral cable insulation and sheath are made of inorganic materials without typical PVC, no acidic gases are produced even under fire conditions. Tests according to GB/T17650.2-1998 show a pH value above 5.0 (standard requirement ≥4.3) and conductivity around 1.0 (standard requirement ≤10.0). 5. High Temperature Resistance: The cable can operate long-term in environments up to 125°C, replacing low-smoke, halogen-free flame-retardant cables rated for 125°C. It can also operate short-term at 1080°C in emergencies. 6. Corrosion Resistance: The cable insulation uses inorganic mineral materials, requiring no additional measures during installation. 7. High Current-Carrying Capacity: Compared to cables of the same cross-section, conventional cables often short-circuit due to insulation issues under overload, where conductors heat up and insulation degrades. Mineral insulated fire-resistant cables use insulation with a melting point of 1375°C, resisting aging or delaying it, allowing higher current transmission and greater overload tolerance. 8. High Mechanical Strength: YTTW (BTTE)/NG-A and BTLY (BTLE) metal-sheathed mineral insulated fire-resistant cables have metal sheaths with high melting points, offering strong resistance to mechanical impact under fire. BBTRZ non-metallic flexible fire-resistant cables feature a unique barrier layer that forms a honeycomb hard structure when burned, effectively resisting external mechanical impact. 9. Customizable Length: As all products in this series are flexible mineral insulated fire-resistant cables, they can be coiled onto reels, allowing virtually unlimited manufacturing lengths. Factories can supply cables based on customer-designated lengths. 10. Stable Insulation Performance: The unlimited length eliminates the need for joints due to insufficient length, reducing the number of joints and enhancing insulation performance and moisture resistance. Traditional BTTZ joints are prone to moisture. Product Specifications Model: BTTZ Voltage Rating: 750V Specifications: 1×6~1×400mm2 2×1.0~2×25mm2 3×1.0~3×25mm2 4×1.0~4×25mm2