Several ways to identify low smoke halogen free shielded cables?

I. Identification of low smoke halogen-free shielded cable several methods?1, low smoke halogen-free shielded cable identification methods of product name identification method. 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 cables. Imitation products in general, the name will have a little different, such as polyethylene insulated low-smoke halogen-free sheathed flame retardant power cables, etc. 2, low-smoke halogen-free shielded cable identification method of the skin burning method. With a soldering iron hot insulation should not be obvious depression, if there is a large depression is that the insulation layer of the material used or defective process. Or barbecue with a lighter, under normal circumstances should not be easy to ignite, after a long time to burn the cable insulation layer is still relatively intact, no smoke and irritating odor, while the diameter increased. If it is easy to ignite, it can be determined that the cable insulation layer does not use low-smoke halogen-free materials (most likely polyethylene or cross-linked polyethylene materials). If there is a large amount of smoke, the insulation is made of a halogenated material. If a long time after burning, the insulation surface shedding serious, no significant increase in diameter, it is not suitable for irradiation crosslinking process. 3, low smoke halogen-free shielded cable identification method of hot water immersion method. The core or cable in 90 ℃ hot water immersion, under normal circumstances, the insulation resistance will not drop rapidly and remain above 0.1MΩ/Km. If the insulation resistance drops rapidly even below 0.009MΩ/Km, it means that there is no suitable irradiation crosslinking process. (Polyethylene or cross-linked polyethylene insulation does not apply to this method of identification, you can use the method of identification of the second article above). 4, low-smoke halogen-free shielded cable identification method of density comparison method. Low-smoke halogen-free materials are denser than water, you can peel off a small amount of insulation into the water, if floating above the surface of the water, it is certainly not low-smoke halogen-free materials.