Knowledge of flame retardant cables and fire resistant cables.

Fireproof wire and cable is a general term for wire and cable with fireproof performance, which is usually divided into fire-retardant wire and cable and fire-resistant wire and cable. It is easy for ordinary people to confuse the concept of flame retardant cable and fire-resistant cable. Although flame retardant cable has many advantages suitable for chemical enterprises, such as low halogen, low smoke and flame retardant, in general, fire-resistant cable can replace flame retardant cable, while flame retardant cable cannot replace fire-resistant cable. Let me take you a brief understanding of their differences and characteristics.

Knowledge of flame retardant cables and fire resistant cables

1. Differences in principles:

Refractory cable depends on the characteristics of fire resistance and heat resistance of mica material in refractory layer to ensure that the cable works normally in fire. Now, the typical cable, fire-resistant cable in ceramics as an emerging technology, it is the principle of this kind of cable in flames can form self supporting ceramic body, have a certain strength, thermal shock and performance is good, in 650 ~ 1000 ℃ high temperature of flame, a certain period of time (0.5 ~ 2 h) can maintain the integrity of the structure, It can play the role of "passive fire prevention" well, and buy valuable time for fire safety. And has no halogen, low smoke, low toxicity, self-extinguishing, environmental protection, easy processing and other characteristics.

2. The structure and materials of fire-resistant cables are different from those of flame-retardant cables. The structure of the flame retardant cable is basically the same as that of the ordinary cable, but the difference is that the insulation layer, sheath, outer sheath and auxiliary materials (wrapping and filling) are all or partially flame retardant materials.Therefore, 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. There is no need for this. Because of the fire-resistant layer of the fire-resistant cable, a multi-layer mica tape is usually used to wrap the wire directly.It can withstand long periods of combustion, even if the polymer at the flame site is destroyed, the wiring will still work.