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What are the differences between fire-resistant cables and flame-retardant cables

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What are the differences between fire-resistant cables and flame-retardant cables

作者: Release Date: 2019-12-13 Author: Click:

What are the differences between fire-resistant cables and flame-retardant cables


The difference between the principle of wire and cable manufacturers: The principle of fire-resistant cable is different from that of flame-retardant cable. The halogen-containing cable flame retardant principle is based on the flame retardant effect of halogen, and the halogen-free cable flame retardant principle is based on the precipitation of water to reduce the temperature to extinguish the fire. It also works fine in a fire.


The difference between structure and material: The structure and material of the refractory cable are not the same as the flame retardant cable.


The basic knotting tree of the flame-retardant cable is: (1) the flame retardant material is used for the insulation layer; (2) the flame retardant material is used for the sheath and the outer sheath; (3) the flame retardant material is used for the wrapping and filling.

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Wire and cable manufacturers fire-resistant cables usually add a fire-resistant layer (mica tape) between the conductor and the insulation layer, so in theory, you can add a fire-resistant layer to the structure of the flame-retardant cable to form a flame-retardant fork. Fire-resistant cables, but this is not really necessary. Because the refractory layer of the fire-resistant cable is usually wrapped with a multilayer mica tape directly on the wire. It can withstand long-term burning, even if the outer insulation of the cable is burned, it can ensure the normal operation of the line.


How to distinguish the pros and cons of wires and cables: see whether there is a "Great Wall Mark" and production license number of the China Electrotechnical Product Certification Commission on the rolled wire packaging label; see if there is a quality system certification; see if the certification is standardized; see Is there a factory name, site, inspection stamp, production date; see if there are trademarks, specifications, voltages, etc. printed on the wires. Also look at the cross section of the copper core of the wire. The superior copper is bright in color and soft in color. The copper core is reddish in yellow, indicating that the copper used is of good quality, while the yellow in white is a reflection of low quality copper. Take a section of the insulation layer to see if its core is in the middle of the insulation layer. What is not centered is the phenomenon of core deviation caused by the low technology. When the power is small, it can still work well. Once the power consumption is large, the thin side is likely to be penetrated by the current. It is advisable to repeatedly bend a wire end by hand. Anything that is soft to the touch, has good fatigue strength, plastic or rubber has a high elasticity, and has no cracks on the wire insulator is a superior product. The outer plastic sheath of the wire should be bright in color and fine in texture. There should be no open flame when ignited with a lighter. Be sure to check whether the length and core thickness are tampered with. It is stipulated in the relevant standards that the error of the wire length cannot exceed 5%, and the cross-section wire diameter cannot exceed 0.02%, but there are a large number of short and short two in the length and fraud on the cross section (such as the 2.5 mm square cross section). Line, in fact, only 2 square millimeters thick).

URL of this article: http://herzheart.com/news/535.html

Keywords: fire resistant cable , flame retardant cable , flame retardant cable price

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