Nowadays, cables have become essential items in our daily life and production, followed by accidents caused by wires and cables, especially the explosion of wires and cables after burning, which is easy to cause casualties. Every year, there are many fire accidents caused by various wires and cables, and the outer sheath of ordinary wires and cables is mostly plastic rubber products, These materials will release a lot of smoke and toxic gases after they are burned in the fire. Once the cable burns and explodes, it will also cause serious harm to the surrounding residents and the environment.
Why do some cables catch fire or even explode? There are many reasons for cable fire, and the most common five are summarized as follows: short circuit, overload, breakdown, cable head burning, and external fire source. Generally, the insulation layer of the cable is damaged, which leads to short circuit and causes the burning of the outer sheath material of the cable. If the cable is overloaded for a long time, serious heating phenomenon will occur, If it is an old cable running at this time, it is easy to break down and cause a fire.
Another common reason is the burning of the cable head. If the surface of the ACSR Cable head is damp or dirty, the porcelain bushing of the cable head is broken and the distance between the outgoing lines is too small, which leads to flashover and fire, causing the surface insulation of the cable head and the insulation of the outgoing line to burn. Of course, another reason is that the external fire source burns the cable, causing the cable burning or even explosion.
So in order to reduce the loss caused by cable burning, fire-resistant cable is designed. Fire resistant cable is the general name for the characteristics of flame-retardant cable and fire-resistant cable. They all have certain fire-resistant characteristics, but many people can’t distinguish the concepts of flame-retardant cable and fire-resistant cable. From its use characteristics, fire-resistant cable can replace flame-retardant cable, But flame retardant cable can not replace fire resistant cable. This is because the working principles of the two are different.
The working principle of flame retardant cable depends on the flame retardant effect of halogen. There is also a halogen-free flame retardant cable. It uses water to reduce the temperature, but the working principle of fire-resistant cable is different from that of flame-retardant cable. The material of fire-resistant cable contains a kind of mica material, which has very high fire resistance and can ensure normal use in the fire.
Understanding the difference between the two working principles, it can be seen that flame-retardant cable is also afraid of fire, just because there are flame-retardant materials, which can strangle the fire in the cradle, while fire-resistant cable is different, its own fire-resistant layer structure, can also maintain normal work in the fire, so in many cases, fire-resistant cable can be used to replace flame-retardant cable.
So the flame-retardant cable and fire-resistant cable will not burn? The flame-retardant cable has a high degree of non combustion characteristics, small combustion range, and can automatically extinguish after the fire disappears. But the flame-retardant cable itself will burn, not completely non combustion. Similarly, fire-resistant cable is the same, and it will burn. Flame retardant cable reduces the temperature through the flame-retardant effect of special materials, while fire-resistant cable relies on its unique fire-resistant layer to ensure that it can work normally in the fire, so fire-resistant cable is better than flame-retardant cable in some occasions.