What is the identification method of LSZH wire?
1. Product name identification method for identification method of low-smoke halogen-free flame-retardant wire.
Wire-low-smoke halogen-free flame-retardant polyethylene insulated wire and cable; cable-low-smoke halogen-free flame-retardant polyethylene insulated low-smoke halogen-free flame-retardant polyethylene sheathed power cable. Imitation products generally have a slightly different name, such as polyethylene insulated low-smoke halogen-free sheathed flame-retardant power cable and so on.
2. The skin burn method is the identification method of low-smoke halogen-free flame-retardant wires.
There should be no obvious depression in the insulating layer with an electric soldering iron. If there is a large depression, it means that the material or process of the insulating layer is defective. Or use a lighter for barbecue. Normally, it should not be easy to ignite. After a long period of burning, the insulation layer of the cable is still relatively intact, without heavy smoke and pungent smell, and the diameter has increased. If it is easy to ignite, it can be determined that the insulation layer of the cable does not use low-smoke halogen-free materials (probably polyethylene or cross-linked polyethylene). If there is a lot of smoke, it means that the insulating layer uses halogen-containing materials. If the insulation surface falls off severely after burning for a long time, and the diameter does not increase significantly, it means that the appropriate irradiation cross-linking process has not been performed.
3. The hot water immersion method is the identification method of low-smoke halogen-free flame-retardant wires.
Soak the core or cable in hot water at 90℃, under normal circumstances, the insulation resistance will not drop rapidly and stay above 0.1MΩ/Km. If the insulation resistance drops rapidly or even lower than 0.009MΩ/Km, it means that it has not been treated by a suitable radiation crosslinking process. (Polyethylene or cross-linked polyethylene insulating materials are not suitable for this method of identification, and can be identified by the method described in Article 2 above).
4. Density contrast method for identification method of low-smoke halogen-free flame-retardant wire.
The density of low-smoke halogen-free materials is higher than that of water, so you can peel off a little insulation layer and put them in the water. If they float above the water surface, they are definitely not low-smoke halogen-free materials.