What is a fire-resistant cable?

Fire-resistant cables refer to cables that can maintain safe operation for a certain period of time under flame burning conditions.

Application of fire-resistant cables

Fire-resistant cables are widely used in high-rise buildings, subways, underground streets, large power stations, and important industrial and mining enterprises, among other places related to fire safety and fire rescue.

What is the difference between flame-retardant wire and cable and fire-resistant wire and cable?

Flame retardant wires and cables. Its flame retardancy refers to the ability to block and delay the spread and extension of flames along wires and cables in the event of a fire accident, minimizing the expansion of the fire range of wires and cables. This type of cable has the characteristic of self extinguishing after ignition. Generally speaking, it can be understood that when the wire and cable product catches fire due to its own fire or external heat source, after the fire source subsides, the wire and cable product no longer burns, or the combustion time is very short. In the category of wires and cables, the symbol - ZR is commonly used to indicate this type. Meanwhile, flame retardant wires and cables are divided into halogen-free flame retardant wires and cables and halogen-containing flame retardant wires and cables. Halogen free flame retardant wires and cables have the advantages of low toxicity and low smoke compared to halogen containing flame retardant wires and cables. The product model is represented as - WDZR. Fire resistant wires and cables. Fire resistant wire and cable refers to the Shandong wire and cable manufacturer's product that can maintain normal operation for a certain period of time, maintain the integrity of the wire and cable line, and maintain the normal operation of the line equipment in the event of a wire and cable fire accident. Fire resistant wires and cables can be divided into two levels according to national standards: Class A and Class B. Usually represented as NHA class and NHB class. Determining whether a wire and cable product belongs to fire-resistant wire and cable is not related to whether the wire and cable product itself has self extinguishing properties. The biggest function of flame-retardant wire and cable is the flame retardancy of the wire and cable product itself. Fire-resistant wires and cables are usually able to maintain normal operation for at least 180 minutes at a flame temperature of 750-800 ℃. There is also a special type of fire-resistant cable called fire-resistant wire and cable. It is manufactured with seamless copper tube as the sheath and magnesium oxide as the insulation material. Due to the unique nature of its materials, fire-resistant wires and cables neither burn nor spread. Experiments have shown that fire-resistant wires and cables continue to operate normally for 2 hours at 800~900 ℃, and continue to operate normally for 30 minutes at 1000 ℃.