What are the advantages of mineral-insulated fire-resistant cables?
Release date:
2022-05-25 16:02
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Mineral-insulated fire-resistant cable Sometimes, it’s necessary to use either iron or plastic conduits. While plastic conduits are prone to aging, iron pipes easily rust. Fire-resistant cables, however, avoid using copper or aluminum tubes altogether—instead, they feature corrosion-resistant copper-aluminum sheaths. These cables not only deliver excellent fire protection but also withstand water mist and mechanical impacts during combustion. Importantly, they emit no smoke or toxic fumes when burned, and their insulation material is entirely inorganic, ensuring no harmful gases are produced during a fire. As a result, these cables cause no secondary pollution, making them a truly green and environmentally friendly product. Compared to cables with the same cross-sectional area, mineral-insulated fire-resistant cables boast significantly higher current-carrying capacity. Typically, the primary cause of cable overloads and short circuits lies in insulation failure. When conductors are subjected to excessive loads, they tend to heat up, leading to thermal degradation of the insulation and eventually triggering a short circuit. In contrast, the insulation used in mineral-insulated fire-resistant cables is crafted from mineral materials with a melting point as high as 1375°C. This unique composition effectively resists both short-term and long-term aging, enabling the cable to safely handle much higher currents and greater overloads without losing performance. Additionally, these cables are completely free from electromagnetic interference. When fire-resistant cables are installed alongside information and control lines within the same conduit, their copper sheaths provide natural shielding, preventing any interference with the signals and data transmitted by the control and power cables. This design ensures superior safety performance: even in the event of a fire, these cables can continue supplying power, allowing critical firefighting equipment to activate promptly and minimize fire-related losses. What’s more, their robust copper/aluminum sheaths serve as outstanding conductors, doubling as reliable grounding PE wires that extend seamlessly along the entire length of the cable. This enhances the overall sensitivity and reliability of ground protection, offering an added layer of safety for both people and property.
Mineral-insulated fire-resistant cables are widely used due to their flame retardancy, durability, high safety factor, stability, cost-effectiveness, and practicality—qualities that make them irreplaceable by conventional wires and cables.
The uniqueness of mineral-insulated fire-resistant cable application locations makes product quality particularly crucial when making a selection.
Mineral-insulated fire-resistant cables are used in multi-story buildings for general lighting, emergency lighting, fire alarm systems, electrical circuits of fire safety equipment, main busbar distribution system circuits, and dual-power switch control circuits. They are also suitable for general lighting, emergency lighting, and potentially hazardous explosive areas in the chemical industry. In subway systems, these cables are employed for ordinary lighting, emergency illumination, fire detection systems, wiring for fire-fighting electrical equipment, as well as smoke exhaust and natural ventilation circuits. In the metallurgical industry, they serve as power and control circuits under high-temperature, harsh environmental conditions, powering EPS emergency power supplies, high-power circuits, and critical uninterrupted power supply systems—specifically, the transmission and distribution circuits in generator rooms. Additionally, they are ideal for general lighting, emergency lighting, computer room control circuits, high-power drives, and power/control circuits designed for extreme temperature environments. These cables are also well-suited for use in potentially hazardous explosive zones within the aerospace manufacturing sector. Furthermore, they can be applied in shopping centers for general lighting, emergency illumination, fire alarm broadcasting systems, and emergency elevator car and station platform circuits.
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