With the development of society, the requirements for wires and cables are increasing. The classification of UL halogen-free electronic wires and cables is becoming more and more detailed, such as fire-resistant, flame-retardant, low-smoke and halogen-free wires and cables. In our daily life, how to distinguish these wires and cables? Then, let me tell you about the identification method of low smoke ul halogen-free electronic wire and cable.

It can be identified by the following aspects:

1. Product name identification method for identification method of low smoke ul halogen-free electronic 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 cables and so on.

2. The method of identification of low-smoke ul halogen-free electronic wires is the burn-in method. Use an electric soldering iron to iron the insulation layer without obvious depressions. If there are large depressions, it means that the materials or processes used for the insulation layer are defective. Or use a lighter to grill. It should not be easy to ignite under normal circumstances. After a long period of burning, the insulation of the cable is still complete, there is no dense smoke and irritating odor, and the diameter has increased. If it is easy to ignite, you can determine that the cable's insulation layer is not using low-smoke halogen-free materials (most likely polyethylene or cross-linked polyethylene materials). If heavy smoke appears, the insulating layer is made of halogen-containing material. If the insulation surface is severely detached after a long period of burning, and the diameter does not increase significantly, it means that the appropriate radiation crosslinking process has not been performed.

3. Low-smoke ul halogen-free electronic wire identification method: hot water immersion method. Immerse the core or cable in hot water at 90 ° C. Under normal circumstances, the insulation resistance will not drop sharply and remain above 0.1MΩ / Km. If the insulation resistance drops rapidly even below 0.009MΩ / Km, it means that it has not been treated with a suitable radiation crosslinking process. (Polyethylene or cross-linked polyethylene insulation materials are not suitable for identification by this method, and can be identified by the method of the second item above).

Density comparison method for the identification method of low smoke ul halogen-free electron wire. The low-smoke halogen-free material has a higher density than water, and you can peel off a little insulation layer and put it in water. If it floats above the water surface, it is definitely not a low-smoke halogen-free material.