What Are The Different Characteristics of Various Fireproof Cables?

Fire rated cables have always been a very popular product type in the cable industry. Fire-resistant cable, that is, under the specified test conditions, the sample is burned. After the test fire source is removed, the flame spread is only limited, and the residual flame or residual burn is a cable that can extinguish itself within a limited time. In the event of a fire, it may burn out and become inoperable, but it can prevent the fire from spreading and avoid greater losses. At present, the cable industry is used to refer to cables with certain fire resistance, such as flame retardant, low smoke halogen free (LSOH) or low smoke halogen free (LSF), fire-resistant and other fire-resistant cables.

Fire rated cables have always been a very popular product type in the cable industry. Fire-resistant cable, that is, under the specified test conditions, the sample is burned. After the test fire source is removed, the flame spread is only limited, and the residual flame or residual burn is a cable that can extinguish itself within a limited time. In the event of a fire, it may burn out and become inoperable, but it can prevent the fire from spreading and avoid greater losses. At present, the cable industry is used to refer to cables with certain fire resistance, such as flame retardant, low smoke halogen free (LSOH) or low smoke halogen free (LSF), fire-resistant and other fire-resistant cables.

1. The feature of flame retardant cable is to delay the spread of flame along the cable, so that the fire will not expand.

Due to its low cost, it is a variety of cables widely used in fire-resistant cables. Whether it is a single cable or laid in bundles, the spread of the flame can be controlled within a certain range when the cable is burned, so it can avoid major disasters caused by cable fire and extension, thereby improving the fire rating of the cable.

2. Halogen-free low-smoke flame-retardant cable (LSOH)

The halogen-free and low-smoke cable not only has excellent flame retardant properties, but also the material that constitutes the low-smoke halogen-free cable has low corrosiveness and toxicity when burning, and produces a very small amount of smoke, thus Reduce the damage to the human body, instruments and equipment, which is conducive to timely rescue in the event of a fire. Although halogen-free low-smoke flame-retardant cables have excellent flame retardancy, corrosion resistance and low smoke concentration, their mechanical and electrical properties are slightly worse than ordinary cables.

3. Low-halogen and low-smoke flame-retardant cables (LSF)

The hydrogen chloride emission and smoke concentration index of low-halogen and low-smoke flame-retardant cables are between those of flame-retardant cables and halogen-free low-smoke flame-retardant cables. Low halogen cable stock will also contain halogen, but at a lower level. The characteristics of this cable are not only flame retardant properties, but also less smoke and hydrogen chloride when burned. This low-halogen low-smoke flame-retardant cable is generally made of polyvinyl chloride (PVC) as the base material, which is processed by high-efficiency flame-retardant, absorbent and smoke suppressant. Therefore, the flame retardant material significantly improves the combustion performance of common flame retardant polyvinyl chloride materials.

Fire-resistant cables; fire-resistant cables can maintain normal operation for a certain period of time under the condition of flame burning, and can maintain the integrity of the circuit. Fire-resistant and flame-retardant cables produce less acid gas and smoke when burning, and their flame-retardant properties are greatly improved. Especially when they are burnt out, the cables can keep the lines running safely under water spray and mechanical shock vibration.

Summarize

The above types of cables are all fire-resistant. During use, you don’t have to worry about the cable catching fire. Even if it really catches fire, it will reduce the spread of the flame and reduce the loss of property. If you need to use a cable and are afraid that overloading the cable will cause a fire, it must be one of the above.