Application and Selection of Mineral-Insulated Fireproof Cables in Modern Construction
Release date:
2022-06-16 15:27
Source:
As Mineral-insulated fire-resistant cable The widespread application of these products in fire protection facilities, critical areas, and electrical systems within hazardous zones has drawn increasing attention due to their superior technical and safety performance. By examining real-world cases from high-rise buildings, this study proposes practical solutions for cable selection and installation methods, providing valuable guidance for electrical designers, building owners, and construction teams.
The Composition of Mineral-Insulated Fireproof Cables
Compared to traditional rigid mineral-insulated cables, flexible mineral-insulated fire-resistant cables consist of copper stranded wires, a mineral composite insulation layer, and a mineral composite sheath. Featuring a flexible structure and made primarily of inorganic materials, these cables effectively address the drawbacks of rigidity, flammability, and toxicity found in conventional designs. As a result, they offer several advantages that other cables lack, such as fire resistance, high current-carrying capacity, ability to withstand impulse voltages, resistance to mechanical damage, halogen-free and non-toxic properties, explosion-proof performance, waterproofing, corrosion resistance, long service life, enhanced safety, tolerance to overload conditions, superior heat resistance, and cost-effectiveness.
Performance comparisons typically show that all wire and cable products rely on organic polymer materials for insulation, making them prone to carbonization under flame conditions and ultimately losing their insulating properties. In contrast, mineral-insulated fire-resistant cables use primarily inorganic minerals or mineral compounds as their key materials, which not only prevent fires but also eliminate the risk of combustion or even supporting combustion. Moreover, these materials generally have melting points exceeding 1,500°C, ensuring that even when exposed to flames, fire-resistant cables can maintain their normal electrical conductivity—making them truly fireproof cables.
The process and structure of mineral-insulated fire-resistant cable products are entirely identical to those of conventional cables, successfully addressing many of the inherent drawbacks that have long plagued magnesium oxide-copper-tube mineral-insulated cable production. The introduction of this innovative product marks a milestone in the history of fire-resistant cable development, while also accelerating the pace at which China’s cable technology R&D capabilities align with international standards. Moreover, it enhances insulation stability by not only preserving the fire-resistant properties of rigid mineral-insulated cables but also introducing features such as resistance to moisture absorption, resulting in even more reliable insulation performance.
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