Identification and harm of true and false national standard wire and cable


introduction



Wire and cable believe that everyone is not strange, but you know how to buy wire and cable? Undoubtedly, the first choice must be national standard products! After all, national standard products are produced in strict accordance with national requirements, and after rigorous control, there is no need to worry about the quality of use.

The harm of non-standard wires?



01. The resistance exceeds the standard. If the conductor resistance exceeds the standard, for a long time or at the same time use induction cooker, TV, air conditioning, refrigerator, computer and other high-power household appliances, the wire will be hot, soft, hot, not only power consumption, but also prone to short circuit, and may even cause fire, resulting in a major disaster.

02. Insulation and sheath are not up to standard. The insulating layer of wire and cable mainly plays the role of preventing leakage and ensuring safety. If recycled or more impurities of rubber or plastic insulation layer, its tensile strength and elongation at break is difficult to meet the requirements of the standard.

03. If the insulation layer is not up to standard, the insulation of the wire and cable is easily cracked during installation, exposing the live conductor and threatening the safety of human life and property.

04. The production process is not up to standard. In order to reduce costs, some enterprises in production, cut corners, cut manufacturing processes at will, their products do not meet the required performance, do not meet the standard requirements, such as high temperature resistance, fire prevention, energy saving, corrosion prevention and so on.

Many cable factories in order to maximize cost savings, many cottage cable companies will make an effort in raw materials. Either cut corners on the conductors, or use recycled or high impurity content rubber or plastic as insulation. Wires and cables with substandard insulation layers are easy to show insulator cracking during installation, exposing the live conductor. In this way, once the cost of the wire and cable is run for a long time at full load, the conductor will heat, causing insulation deformation and melting, short circuit, and causing fire. On the surface, it seems that the insulation and sheath are burning, and the real reason is that the conductor carrying current caused by quality problems is too large, resulting in excessive heat and fire. Shanzhai cable not only endangers the personal safety of consumers, but also impacts the market, directly affecting the normal production and operation of regular enterprises.

Identifying counterfeit cables?



Over the years, with the continuous development and continuous innovation of the cable and cable industry, more and more non-national cables have entered the market, and there are also some inferior cables, that is, the cottage cable in people's mouth. Most of the counterfeit products greatly simplify the product design and development and testing and inspection process, the cost is greatly reduced, coupled with irregular management and tax evasion, then the market price may be greatly reduced. Therefore, the market price of shanzhai products will be much lower than the market price of regular production products, which will greatly impact the market of regular products, thereby seriously affecting the operation of regular enterprises and disrupting market order. If left to their own devices, who would be willing to spend a lot of energy on R&D and innovation?

The cottage cable is harmful but not beneficial, and should be the most powerful counterattack of the whole society. So how should we be able to identify the cottage cable, the following will give you to share some simple and practical tips, I hope to be useful to you.

01, with fire

Fake wires will burn quickly with fire, have an open flame and emit smoke. Real wires burn slowly, with a small amount of smoke or smoke-free, no open flame.

02, look at the packaging

There are marks on the real wire insulation cortex, such as wire specifications, 3C certification, etc., and the handwriting is clear. Generally can not be washed off, but can not wipe off, if you want to wash off its writing must be washed off with banana water.

There is a certificate in the electric coil, and the certificate has the manufacturer's address, telephone, 3C logo, quality system certification, voltage, wire model specifications, etc. False lines are absent or lacking.

03, look at the copper

The higher the brightness of copper, the better the copper, and the brightness is uniform, glossy, and there is no layer. Qualified copper wire copper core should be purple, shiny, soft. If you can cut off a small piece of plastic skin, carefully check the copper wire inside, and touch the top of the copper wire with the palm of your hand, it should feel smooth and non-stinging, and feel soft.

The shoddy copper core wire copper core is purplish black, yellow or white, many impurities, poor mechanical strength, poor toughness. A little force will break, and the wire is often broken. When checking, you just peel off one end of the wire 2CM, and then rub a piece of white paper on the copper core slightly, if there is black material on the white paper, it means that there are more impurities in the copper core.

In addition, the insulation layer of shoddy wire seems to be very thick, in fact, most of them are made of recycled plastic, and over time, the insulation layer will age and leak electricity.

04, measure the length

The state does not have to be forced to play rice, but there are many manufacturers also play rice, play the meter is not necessarily the national standard, but the general national standard generally does not play rice. It is just a means, the general length of the national standard line is 100 meters.

05, look at the feel

It is advisable to bend a wire head repeatedly by hand, and those with soft feel, good fatigue strength, plastic or rubber feel elasticity, and no crack on the wire insulator are excellent products.

Identify national standard wire and cable products?



01, see whether there is a quality system certificate, see whether the certificate is standardized, see whether there is a factory name, site, inspection seal, production date; See whether the wire is printed with trademarks, specifications, voltage and other marks; The key also depends on the copper core color of the wire, excellent copper color bright, soft color, and defective or put too long copper will be black.

02, it is advisable to bend a wire head repeatedly by hand, any soft feel, good fatigue strength, plastic or rubber feel elastic and no cracks on the wire insulator is excellent products.

03, look at the copper, qualified copper wire copper core should be purple, shiny, soft. The shoddy copper core wire is purplish black, yellow or white, many impurities, poor mechanical strength, poor toughness, a little force will break, and the wire is often broken. When checking, just peel off one end of the wire 2cm, and then rub a piece of white paper on the copper core slightly, if there is black material on the white paper, it means that there are more impurities in the copper core. In addition, although the insulation layer of shoddy wire looks very thick, it is actually mostly made of recycled plastic, and over time, the insulation layer will age and leak.

04, good quality wire, generally within the specified weight range. For example, the commonly used plastic insulated single strand copper core wire with a cross-sectional area of 1.5mm2 has a weight of 1.8 ~ 1.9 kg per 100 meters; 2.5mm2 plastic insulated single strand copper core wire, weight of 3 ~ 3.1kg per 100 meters; Poor quality wire weight is insufficient, either the length is not enough, or the wire copper core impurities are too much.

05, fake and shoddy wire production cost is low, often in the guise of low prices for sales, therefore, in the purchase of wire can not be excessive pursuit of price, electricity is about you and me, the purchase of cable, "national standard" is the starting point.

Qingdao Tianxing Cable Co., Ltd. is a technology enterprise specializing in the production of wire and cable in Shandong Province, with more than 150 sets of domestic excellent cable production equipment and testing equipment, excellent production technology, modern testing equipment, to ensure stable product quality and timely supply. The company's main products are power cable, mineral cable, high life wire and cable, radiation crosslinked cable, control cable, computer cable, photovoltaic cable, communication cable, data cable, low smoke halogen free cable, flame retardant series wire and cable.