Dry goods sharing, a minute to take you to understand the purchase of wire and cable points

What are the main points of purchasing wires and cables? Let's take a look. As the main carrier of power transmission, wire and cable are widely used in electrical equipment, lighting circuits, household appliances, etc. Its quality directly affects the quality of the project and the safety of consumers' lives and property. There are many wire varieties on the market, and appropriate wires should be used according to their own power load.

The wires sold on the market are cheap, and some people are cheap first, but cheap wires often fail to achieve the performance he describes, which will bring many security risks to himself. The technical content of the wire production will not be too high, and the raw materials are not much different. If it is too cheap, you cannot remove the work, nor can you give enough quantity. So how do you identify it? Let me show you some easier ways to identify it. 1. Please show me the packing. The national standard front is often better, neat, and has a sense of quality when held in hand. 2. To open the package to see the inside of the wire. The national standard wire 1.5-6 square wire requires a leather thickness (insulation thickness) of 0.7mm, and too thick is not a sign. The corresponding his heart is certainly not enough. The thread skin can be pulled hard. Not easy to tear is generally the national standard 3. This is a national standard line that is extinguished within 5s after burning once with fire and has a certain flame retardant function. 4. Please look inside. The higher the gloss of the inner material (copper), the better the copper, the uniform the luminosity, the luster, and the lack of layering. National standards require that the core must use oxygen-free copper. Signs such as black bar copper may be at risk of accident. The thickness of the internal core has certain requirements, but it is not very strict. But not much can go wrong. Just something small. This is an error that the ordinary eye cannot see. 6, length, the state does not have a mandatory requirement to play rice, but many manufacturers also play rice, playing rice is not necessarily the national standard, but the general national standard generally does not play rice. Not a cover, Tamina's just a ploy. 7. The state stipulates that the front must bear certain signs. If the maximum value does not exceed 500mm, the following signs will appear. The above generally has the product's trademark, manufacturer's name, executive standard, etc.

What is the service scope of wire and cable? Let's take a look. Power system: The wire and cable products used in the power system mainly include overhead bare wires, passenger cars (buses), power cables (plastic cables, oil-paper power cables (basically replaced by plastic power cables), rubber sleeve cables, overhead insulated cables), branch cables (partial bus replacement), electromagnetic wires and electrical equipment wires and cables for electrical equipment, etc. Information transmission system: The wires and cables used in the information transmission system mainly include municipal cables, TV cables, electronic cables, wireless cables, optical cables, data cables, electromagnetic wires, power communication or other composite cables. Mechanical instrument system: This part is applicable to almost all products except overhead exposed wires, but mainly includes power wires, magnet wires, data wires, instrument cables, etc.