1. Product Introduction
Fire-resistant cables are flame-retardant and fire-resistant cables. They generally refer to mineral-insulated cables (MI cables) with insulation made of inorganic materials such as magnesium oxide and mica, or cables with similar properties.
The 750V-rated flexible inorganic-insulated fire-resistant power cable is an upgrade to traditional mineral-insulated cables. It utilizes solid or stranded copper wire as the conductor, inorganic tapes such as mica and silica with excellent dielectric properties as the insulation, and a metallic sheath such as copper or stainless steel as the sealing sheath. This cable retains the high-temperature resistance, fire resistance, low smoke, non-toxicity, and aging resistance of traditional mineral-insulated cables, while overcoming their drawbacks, such as poor bending performance, moisture absorption, numerous joints, inconvenient installation, expensive manufacturing equipment, complex processes, low production output, high energy consumption, and limited manufacturing lengths. This creates a stronger foundation for the widespread application of fire-resistant cables.
This product is suitable for use in densely populated areas such as large shopping malls, hospitals, office buildings, and subways, as well as in critical facilities such as offshore oil platforms, chemical plants, refineries, museums, and computer centers. It offers high safety and reliability.
2. Implementation Standards
Q/ZL35-2009 "Flexible Inorganic Insulated Fire-Resistant Power Cable, Rated Voltage 750V"
Note: This standard is prepared in reference to national standards GB/T 13033.1-2007 "Mineral Insulated Cables and Terminals, Rated Voltage 750V and Below - Part 1: Cables" and GB/T 5023.3-2008 "Polyvinyl Chloride Insulated Cables, Rated Voltage 450/750V and Below - Part 3: Unsheathed Cables for Fixed Wiring."
3 Cable Models and Specifications
BWT(Z) Copper Core Flexible Inorganic Insulated (Corrugated) Copper Sheathed Fire-Resistant Power Cable
BWG(Z) Copper Core Flexible Inorganic Insulated (Corrugated) Stainless Steel Sheathed Fire-Resistant Power Cable
BWT(Z)V Copper Core Flexible Inorganic Insulated (Corrugated) Copper Sheathed PVC Sheathed Fire-Resistant Power Cable
BWG(Z)V Copper Core Flexible Inorganic Insulated (Corrugated) Stainless Steel Sheathed PVC Sheathed Fire-Resistant Power Cable
BWT(Z)Y Copper Core Flexible Inorganic Insulated (Corrugated) Copper Sheathed Polyolefin Sheathed Fire-Resistant Power Cable
BWG(Z)Y Copper Core Flexible Inorganic Insulated (Corrugated) Stainless Steel Sheathed Polyolefin Sheathed Fire-Resistant Power Cable
Note: If other flammability requirements apply to the cable, add the corresponding symbol before the model number in the table in accordance with GB/T 19666-2005, separated by a "-". For example: Class A flame-retardant, low-smoke, zero-halogen, copper-core, flexible, inorganically insulated, corrugated copper-sheathed fire-resistant power cable, designated as: WDZA-BWTZY
4 Product Characteristics
4.1 Rated voltage: 450/750 V.
4.2 Maximum rated temperature of cable conductor: Normal operation: 90°C, short circuit (maximum duration 5 seconds): 250°C
4.3 The cable is fire-resistant.
4.4 The stainless steel sheath is suitable for applications requiring corrosion resistance.
4.5 The minimum bending radius during cable installation is 25D (D is the cable outer diameter).
4.6 The cable is not restricted by any installation level difference. The ambient temperature during installation should be no less than 0°C.
