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About UsHongsheng Wire and Cable Co., Ltd. is a key enterprise in Zhejiang Province specializing in the production of wires and cables, integrating industry, commerce, trade, production, education, and research. Its main production, processes, and testing equipment are all designed and configured according to international standards.
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ProductsEmploy scientific management and quality assurance systems based on GB/T19001—IS09001 and GB/T24001—ISO14001 environmental management systems to organize production management.
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Contact UsWe believe: Great achievements depend on quality. Your satisfaction is our eternal pursuit!
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2021
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A one-minute overview of the selection of fire-resistant wires and cables for high-rise buildings
High-rise buildings contain numerous electrical wires and cables, resulting in a high risk of fire caused by them. The primary purpose of using fire-resistant electrical wires and cables in high-rise buildings is to reduce the incidence of fires and control losses.
High-rise buildings contain numerous wires and cables; therefore, fires caused by wires and cables are very common. Wires and cables The primary purpose of using fire-resistant wires and cables in high-rise buildings is to reduce the occurrence of fires and control losses.
I. Fire-resistant wire Wires and cables Classification and performance
Currently, there are many types of fire-resistant wires and cables on the market. According to their combustion characteristics, they are mainly divided into the following three types:
1. Fire-resistant wire Wires and cables
Fire-resistant wires and cables are characterized by a high-quality fire-resistant layer that can maintain the integrity of the circuit for a long time in a high-temperature flame of 500~800℃. The advantage is that, in the event of a fire, it can provide power for evacuation, rescue, and fire fighting for a certain period of time. Therefore, fire-resistant wires and cables are usually used in power plants, high-rise buildings, nuclear power plants, and enterprises with high power load requirements.
2. Mineral insulated cable Wires and cables
A mineral-insulated cable is composed of inorganic mineral magnesium oxide powder and uses a seamless copper tube as the sheath. It has the properties of high temperature resistance, radiation resistance, and mechanical wear resistance. However, it has many joints, high installation costs, and the insulation is easy to absorb moisture, making it difficult to produce multi-core cables and meter-long cables with specifications of 50mm or more. One type uses argon arc welding longitudinally wrapped mica tape, polymer insulation, polymer sheath or copper tape sheath, which is comparable to rigid mineral insulated cables in fire and combustion performance, and has advantages in production, installation and laying.
3. Flame-retardant wire and cable
It has the function of flame retardancy and flame spread retardation. It is a flame-retardant wire and cable that is not easy to catch fire. Compared with ordinary wires and cables, it has the same internal structure. The difference is that flame-retardant wires and cables use flame-retardant materials for the insulation layer and sheath, while flame-retardant materials are used as fillers, belts, and other auxiliary materials. Therefore, when a fire occurs, flame-retardant wires and cables can effectively ensure that the fire will not spread along the wires and cables, and can automatically extinguish internal and residual flames within an effective range and time, effectively controlling the fire range, reducing property losses, and buying more time for fire fighting.
4. Other fire-resistant wires Wires and cables
Due to different requirements for the use of wires and cables, in addition to the common fire-resistant wires and cables mentioned above, there are several types of wires and cables used in relatively special environments, including low halogen, halogen-free, low smoke, low toxicity, halogen-free low smoke flame-retardant, and halogen-free low smoke flame-retardant fire-resistant.
II. Use of fire-resistant wires and cables in high-rise buildings
According to relevant regulations, when selecting the power supply main line for fire-fighting facilities in high-rise buildings, different selections should be made based on the different heights of the high-rise building. When the building height reaches 10m or the number of floors reaches 53 or more, mineral insulated cables should be used. In addition, when selecting wires and cables in high-rise buildings, attention should be paid to selecting low-smoke and low-toxicity wires and cables. Wires and cables The main purpose is to ensure that people indoors can escape smoothly in the event of a fire.
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Guangzhou Baiyun International Airport
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2021-04-13
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Address: Central Industrial Park, Luqiao District, Taizhou City, Zhejiang Province
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