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"Non-standard wire" is more cost-saving for cutting costs
It is understood that the wire used in the decoration is generally a single-stranded copper wire, and its cross-sectional area mainly has three specifications, which are 4.0 square millimeters and 2.5 square millimeters. Different types of wires are selected according to the use of electrical appliances. "Wire and Cable Products Compulsory Certification JB/T8734.1-6-2012" standard stipulates that all wires and cables sold in the market should meet or exceed the national standard, there should be no "non-standard wire." Then, where is the “non-standard wire†in the mouth of the business?
'Non-standard wire' refers mostly to the number of wires, wire diameters, and thickness of the outer covering insulating layer, which are not in line with national standards. Its price is relatively cheaper. The 'national standard wire' is produced in accordance with national standards, good quality, meters, wire diameter, etc. are up to the standard wire, the price must be more expensive. “The business owner exemplifies:†The length of the 'national standard wire' is usually 100 meters, while the length of the 'non-standard wire' is 100 meters, but the actual length is only 85 meters to 95 meters. "Non-standard wire" mostly reduces the actual cross-sectional area of ​​the copper core to reduce the cost, such as the nominal cross-sectional area of ​​2.5 square millimeters of double plastic copper core wire corresponding to the diameter of the copper core should be 1.78 millimeters, but some businesses produce wire copper core The diameter is only 1.6 millimeters or less, so that the actual cross-sectional area of ​​the copper core is less than 2.5 square millimeters at a time. In a store, a cable known as “2.5 square millimeters of wire†was found on-site and found on the copper core of the wire. With a diameter of less than 1.4 mm, the “non-standard wires†that cut corners and work items easily lead to short circuit trips or burn out of the power mains, potentially causing huge fire hazards.
"Non-standard wire" giant profits can be repeated
The reason why there are “non-standard wires†other than “national standard wires†on the market is closely related to the fact that some wire manufacturers and decoration constructors are cutting corners for reducing costs in pursuit of profits.
It is understood that for a cable with a length of 100 meters and a cross-sectional area of ​​2.5 square millimeters, the cables with basically no difference in the appearance of the two discs will be sold at prices ranging from 130 yuan to 170 yuan and the "non-standard wires". The selling price is only about RMB 90 to RMB 120, which is almost one-third cheaper. Few consumers nowadays buy this type of basic material themselves, and most rely on the introduction and recommendation of the business. Some decorated "guerrillas" and small-scale decoration companies, driven by profits, purchased large quantities of low-priced "non-standard wires" in large quantities, making inferior "non-standard wires" able to go down the production line with great fanfare and go to the counter. Entering the construction site has laid a huge hidden danger for future electricity safety.
“At present, China's wire and cable industry is low in concentration and the supply of high-end products is insufficient. In contrast, 'non-standard wires' are low in cost and more profitable.†This is also the main reason why “non-standard wires†continue to be banned. . "The price of 'non-standard wires' is about one-third cheaper than the price of 'national standard wires'. No matter whether it is a renovation contractor or a retailer, as long as low-priced purchases of 'non-standard wires' are sold at a higher price, the middle difference will be Broke into personal pockets."
Clearing "non-standard wires" still needs multiple efforts
At present, national standards "Cable GB" GB5023-1997, "Plane voltage 450/750V and below PVC insulated cables" GB/T5023-2008 standards for different specifications of the cable and wire in the "flag", "pre-insulation aging resistance "Strength", "Sheath tensile strength before aging", "Conductor resistance" and other items have strict requirements. The existence of “non-standard wires†is no longer a secret in the industry. There are many “non-standard wires†on the market and even posing as brand-name marks. Consumers are unaware of this. In order to standardize the market, as soon as possible to eradicate the inferior “non-standard wires†in the market, we must first strengthen industrial planning and government guidance, and we must manage and make good use of government investment. The competent departments should strengthen the supervision and supervision and inspection efforts and standardize the market competition order. In order to purify the market environment, wire and cable manufacturers must strengthen self-discipline, and construction companies must strictly control the quality of wire and cable. "Once there is no market and no market, naturally no one will come to fraud."
Distinguish between "national standard wire" and "non-standard wire" five steps
First, look at copper. High-quality copper core wire copper core should be purple, shiny. The shoddy copper core copper core is purple-black, yellowish or white, impurities are numerous, and the wire is often broken. At the time of inspection, consumers can peel off the wire by about 2 cm, and then use a piece of white paper to make a slight twist on the copper core. If there is a black material on the white paper, the copper core contains more impurities.
Second, check the information. Check whether there is quality system certification, whether the certificate is standardized, and whether the product information such as trademarks, specifications, voltage, factory name, site, inspection seal, and production date is complete.
Third, try to feel. It is desirable to repetitively bend a wire head by hand, which is generally a good product with soft hand feeling, good fatigue resistance, high elasticity of plastic or rubber feel, and no crack on the wire insulator.
Fourth, weigh. Good quality wires are generally within the weight limits specified by the national standard. For example, 2.5 square millimeters of plastic insulated single strand copper wire weight is 3.0-3.1 kilograms per 100 meters; 4.0 square millimeters of plastic insulated single strand copper wire weight is 4.4-4.6 kilograms per 100 meters.
Fifth, than the price. Because of the low production costs of "non-standard wires," some traders often sell cheap products at low prices for the sake of consumers. Consumers must not be petty and cheap.
Market "non-standard" wire unspoken rules ... recognized after the purchase
In recent years, with the continuous improvement of living standards, people's demands for home improvement have become higher and higher. Generally speaking, it is required that the home environment is comfortable, environmentally friendly, beautiful, artistic, and most importantly safe. This, of course, cannot be ignored. The root cable is hidden in the wall. However, many home building materials markets are now less formal, especially for most of the wire and cable stores. These stores sell “Guangzhou standard wire†and “non-standard wire†wires, and almost every store owner recommends products. , will ask consumers whether they need "national standard wire" or "non-standard wire", and frankly, if consumers buy "national standard wire", the store can provide test certificates or test reports; but if you buy "non-standard wire" is not only not detected Certificates or reports will not be responsible for product quality in the future.
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