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Analysis on how to improve the passing rate of fire resistance experiment of fire-resistant cable
Time:
2019-08-08
In recent years, more and more fire-resistant cables have been used, mainly because the performance of the cable has been recognized by users.
In recent years, more and more fire-resistant cables have been used, mainly because the performance of the cable has been recognized by users. At the same time, the number of manufacturers producing the cable is also increasing. It is very important whether the quality of the fire-resistant cable is guaranteed and stable for a long time. In general, when developing fire-resistant cable products, some companies first trial produce a section of products, submit it to relevant national detection agencies, obtain detection reports, and then conduct batch production. A few cable manufacturers have created their own fire-resistant test detection rooms. The fire-resistant test is to inspect the process results of the cables produced. The same process scheme and the performance of cables produced in different periods have certain differences, For enterprises producing fire-resistant cables, if the fire resistance test pass rate of fire-resistant cables is 99%, the fire-resistant cables will have a risk of 1% of potential safety hazards, which is 100% of the risk for users. For the above problems, how to improve the fire resistance test pass rate of fire-resistant cables is described as follows from the aspects of raw materials, conductor selection, production process control, etc.:
1. Copper conductor
Some manufacturers use copper clad aluminum conductor as the cable conductor core, but copper conductor can not be used as the conductor of fire-resistant cable.
2. Circular compact conductor should be used
For the round core with axial symmetry, the mica tape is wrapped tightly in all directions, so the round compact conductor should be used for the conductor structure of fire-resistant cable.
Keword:
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