The Cr1 C1 Fire Resistant Cable 2X0.9mm² / 2X1.5mm² is a special-purpose cable designed for scenarios with high safety requirements, whose core advantages lie in its excellent fire resistance and stable electrical transmission capacity. It is widely applicable to fields with strict requirements for emergency power supply in case of fire, such as building fire protection, emergency lighting, and industrial control. The "Cr1 C1" in its model indicates that the cable has passed specific fire resistance certification, enabling it to maintain normal power supply for a certain period when a fire breaks out. This buys crucial time for personnel evacuation and emergency equipment operation, making it an important electrical supporting product for safeguarding lives and property safety.​ In terms of structural design, this cable adopts a 2-conductor configuration, with conductor cross-sectional areas of 0.9mm² and 1.5mm² respectively. These two specifications can be flexibly selected according to different power load requirements. The conductors are made of high-purity oxygen-free copper with a copper content of ≥99.97%, which not only has excellent electrical conductivity (DC resistance ≤20.0Ω/km at 20℃ for the 0.9mm² specification and ≤13.3Ω/km for the 1.5mm² specification) but also possesses good flexibility and fatigue resistance. This facilitates wiring in complex environments such as building walls, suspended ceilings, and pipeline interlayers, reducing construction difficulty. The surface of the conductor is tinned to effectively prevent oxidation and corrosion, extending the service life of the cable, especially suitable for scenarios that are in humid or semi-humid environments for a long time (such as underground garages and basement fire protection systems).​ Fire resistance is the core highlight of this cable. It has passed the Cr1 C1 fire resistance grade test, meaning that within the specified flame temperature (usually not lower than 750℃) and burning time (generally 90 minutes), the cable can maintain circuit integrity without short circuit or open circuit, and the insulation layer will not fall off or burn. To achieve this performance, the cable adopts a multi-layer fire-resistant structure design: the conductor is wrapped with a layer of mica tape fire-resistant layer. Mica tape has extremely high high-temperature resistance and insulation properties, and can form a hard inorganic insulation layer at high temperatures to block the invasion of flames; outside the fire-resistant layer, a flame-retardant polyvinyl chloride (PVC) or low-smoke halogen-free polyolefin insulation layer is extruded. This not only further enhances the fire resistance effect but also reduces the release of toxic and harmful gases and smoke during a fire, meeting the dual requirements of modern buildings for environmental protection and safety. Among them, the insulation layer of the low-smoke halogen-free version has a smoke density rating (SDR) of ≤60 and a halogen gas release amount of ≤5mg/g when burned, which can effectively reduce the impact of visibility in the fire site and the risk of personnel poisoning.​ In terms of electrical performance, the rated voltage of this cable is 450/750V, which meets the voltage requirements of most low-voltage emergency power supply systems. It can stably transmit electrical energy, avoiding the situation where emergency equipment (such as fire pumps, emergency indicator lights, and smoke exhaust fans) cannot work normally due to voltage fluctuations. At the same time, the cable has good aging resistance and mechanical strength, and can operate normally within a temperature range of -40℃ to 70℃. After 1000 hours of thermal aging testing, the insulation layer has a tensile strength retention rate of ≥80% and an elongation at break retention rate of ≥70%, which can adapt to different climate environments and usage conditions. In addition, the cable also has outstanding anti-interference performance. The 2-conductor structure adopts a twisted pair process, which can effectively reduce the impact of electromagnetic interference on signal transmission and ensure the stable transmission of emergency control signals, especially suitable for emergency circuits in industrial automation control.​ In terms of application scenarios, the Cr1 C1 Fire Resistant Cable 2X0.9mm² / 2X1.5mm² covers a wide range of fields. In civil buildings, it is often used in fire emergency lighting circuits, fire elevator power supply circuits, and fire alarm system lines of high-rise buildings to ensure that these key systems do not stop operating when a fire occurs; in industrial scenarios, it can be used in emergency control circuits of industries such as petrochemical, metallurgy, and electric power, such as the emergency shut-off valve control lines in chemical plants and the emergency cooling system power supply lines in power plants, to cope with potential high-temperature and fire risks; in public facilities, it is also suitable for emergency broadcasting systems and evacuation indication system lines in crowded places such as subways, tunnels, and airports, providing guarantees for large-scale personnel evacuation.​ Overall, the Cr1 C1 Fire Resistant Cable 2X0.9mm² / 2X1.5mm² has become an indispensable cable product in scenarios with high safety standards due to its reliable fire resistance, stable electrical transmission, flexible specification selection, and wide applicability. Its material selection, structural design, and performance testing all strictly comply with relevant national standards (such as GB/T 19666-2019 "General Rules for Flame Retardant and Fire Resistant Wires, Cables or Optical Cables"). It can not only meet the emergency power supply needs but also ensure the safe and stable operation of the electrical system in daily use, building a solid line of defense for the safe operation of various scenarios.