Wires and cables with fire-resistant functions are collectively called fire-resistant wires and cables, which are generally divided into flame-retardant wires and cables and fire-resistant wires and cables. It is easy for ordinary people to confuse the concept of flame-retardant cables and fire-resistant cables. Although flame-retardant cables have many advantages that are more suitable for chemical companies, such as low halogen, low-smoke and flame-retardant, in general, fire-resistant cables can replace flame-retardant cables. , And flame-retardant cables cannot replace fire-resistant cables. So what is the specific difference between the two?

Fire-resistant cables refer to cables that can maintain safe operation for a certain period of time under flame burning. Fire-resistant cables are widely used in high-rise buildings, underground railways, underground streets, large power stations and important industrial and mining enterprises and other places related to fire safety and fire protection, such as power supply lines and control lines of emergency facilities such as fire fighting equipment and emergency guide lights.

Flame-retardant cable refers to a cable whose sample is burned under specified test conditions, and after the test fire source is removed, the flame spreads only within a limited range, and the residual flame or residual burn can be extinguished by itself within a limited time. Its fundamental feature is: it may be burnt out and cannot operate in a fire situation, but it can prevent the spread of fire. In layman's terms, if a cable catches a fire, it can limit the combustion to a local area without spreading, so as to protect other equipment and avoid greater losses.

The principle of fire-resistant cables is different from that of flame-retardant cables. The flame-retardant principle of halogen-containing cable is based on the flame-retardant effect of halogen, and the flame-retardant principle of halogen-free cable is to extinguish the live baking by lowering the temperature of the precipitated water. Fire-resistant cables rely on the fire-resistant and heat-resistant characteristics of the mica material in the fire-resistant layer to ensure that the cable can operate normally even in the event of a fire.

As a new technology, ceramic cables, which are now representative of fire-resistant cables, are based on the principle that such cables can form a self-supporting ceramic body in the flame, with certain strength, thermal shock resistance and excellent electrical functions. The integrity of the structure can be maintained within a certain time (0.5~2h) in a flame at a high temperature of 650~1000℃, which can give full play to the effect of "forced fire prevention" and win precious moments for fire safety. And it has the characteristics of halogen-free, low smoke, low toxicity, self-extinguishing, environmental protection, and easy processing.

The basic structure of a flame-retardant cable is: flame-retardant materials are selected for the insulation layer, flame-retardant materials for the sheath and outer sheath, and flame-retardant materials for the wrapping and filling. The fire-resistant cable generally adds a fire-resistant layer between the conductor and the insulating layer, so theoretically, a fire-resistant layer can be added to the structure of the flame-retardant cable to form a flame-retardant and fire-resistant cable.