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What is the difference between flame retardant cable and fire resistant cable?
Release Time:
Jun 02,2023
Ordinary people are very easy to confuse the concepts between flame-retardant cables and fire-resistant cables. Even flame-retardant cables have many advantages that are more suitable for use in chemical companies, such as low-halogen and low-smoke flame-retardant. But in general, fire-resistant cables can replace flame-retardant cables, but flame-retardant cables cannot replace fire-resistant cables.
Ordinary people are very easy to confuse the concepts between flame-retardant cables and fire-resistant cables. Even flame-retardant cables have many advantages that are more suitable for use in chemical companies, such as low-halogen and low-smoke flame-retardant. But in general, fire-resistant cables can replace flame-retardant cables, but flame-retardant cables cannot replace fire-resistant cables. Their main thing is to:
1. The difference in principle
The principle between fire-resistant cables and flame-retardant cables is different. The flame retardant principle of the halogen cable is mainly based on the halogen flame retardant effect, and the flame retardant principle of the non-halogen cable is to rely on the precipitated water to lower the temperature to extinguish the fire. The fire-resistant cable relies on the fire-resistant and heat-resistant performance of the mica material in the fire-resistant layer, so it can ensure that the cable can work normally in the event of a fire.
Second, the difference between structure and material
The structure and material of fire-resistant cables are also different from those of flame-retardant cables. The basic structure of the flame retardant cable is:
(1) The insulating layer is made of flame retardant material.
(2) The sheath and outer sheath are made of flame retardant materials.
(3) Taping and filling are made of flame retardant materials.
Fire-resistant cables usually add a fire-resistant layer between the conductor and the insulating layer, so in theory, a fire-resistant layer can be added to the structure of the flame-retardant cable to form a cable that is both flame-retardant and fire-resistant, but it is not practical. There is no need for this. Because of the refractory layer of the fire-resistant cable, multi-layer mica tape is usually used to wrap directly on the wire. It can withstand long-term burning, even if the high polymer where the flame is applied is burned, it can also ensure the normal operation of the circuit.
flame retardant cable
3. The clear concepts and advantages and disadvantages of flame-retardant cables, halogen-free cables, and fire-resistant cables
The characteristic of flame retardant cable is to delay the flame along the cable so that the fire will not expand. Because of its low cost, it is a cable variety widely used in fireproof cables. Whether it is a single cable or laid in bundles, the flame can be controlled within a certain range when the cable burns, so it can avoid major disasters caused by fire and delay, thereby improving the fire protection level of the cable line.
The feature of the halogen-free low-smoke flame-retardant cable is that it not only has good flame-retardant properties, but also does not contain halogen, which is less corrosive and toxic when burned, and produces a very small amount of smoke, thereby reducing Damage to personal instruments and equipment is conducive to timely rescue in case of fire. Although it has good flame retardancy, corrosion resistance, and very little smoke concentration. But its mechanical and electrical properties are slightly worse than ordinary cables.
The fire-resistant cable is mainly able to maintain normal use for a certain period of time under the condition of flame burning, and can ensure the integrity of the line. When the fire-resistant and flame-retardant cable burns, there is less acid gas smoke, and the fire-resistant and flame-retardant performance can be greatly improved. Especially when burning, accompanied by water spray and mechanical shock, the cable can still maintain the integrity of the line.
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