"Non-standard wire" continues to be banned

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.

"Non-standard wire" for the cost of more than cutting corners It is understood that the wire used in the decoration is generally a single strand of copper wire, and its cross-sectional area mainly has three specifications, which are 4.0 square millimeters, 2.5 square millimeters and 1.5 square millimeters, according to use Different types of electric wires are selected for different electric 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?

A business owner, who declined to be named, stated: "The 'non-standard wire' refers mostly to the number of wires, caliber, and the thickness of the outer insulation layer that are not in line with the national standards. It is relatively cheaper. The 'national standard wire' It is produced in accordance with national standards, with good quality, wire that meets the standard for meters, wire diameter, etc. The price is also more expensive." The merchant example: "The length of the 'national standard wire' is usually 100 meters, and 'non-standard wire' The length of the label is 100 meters, but the actual length is only 85 meters to 95 meters."

In addition, the merchant also revealed that "non-standard wires" mostly reduce the actual cross-sectional area of ​​the copper core to reduce costs. For instance, the diameter of a copper core with a double-clad copper core with a nominal cross-sectional area of ​​2.5 mm2 should be 1.78 mm. However, some manufacturers produce wire copper cores with a diameter of 1.6 mm or less. This way, the actual cross-sectional area of ​​copper cores Not more than 2.5 square millimeters at all.

In a store, a so-called "2.5 mm2 wire", the reporter found on-site measurement, the copper wire diameter is less than 1.4 mm. Such “non-standard wires” that are cut corners and cuts can easily cause short-circuit trips or burn out of the power mains, potentially causing potential fire hazards.

"Non-standard wire" giant profits can not be repeated on the market why there will be "national standard wire" other than "non-standard wire", and some wire manufacturers and decoration construction to save money for the pursuit of profit-shaking and closely related.

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 are sold at prices ranging from 130 yuan to 170 yuan for "national standard wires", and "non-standard wires". The selling price is only about RMB 90 to RMB 120, which is almost one-third cheaper.

Cui Tao, currently the decoration engineering manager, said that few consumers nowadays buy this kind 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 their interests, 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." said Liu Chen, Secretary-General of the Beijing Marketing Association Household Branch, which is also " "Non-standard wire" is the main reason for repeated bans.

"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 Into the personal pockets." Liu Chen explained in detail.

Eliminating “non-standard wires” still requires multiple efforts At present, national standards “cable GB” GB5023-1997, “PVC insulated cables with rated voltage of 450/750V and below” GB/T5023-2008 and other standards for different specifications of cables and wires There are stringent requirements for such items as “signs”, “tensile strength before insulation aging”, “tensile strength before jacket aging”, and “conductor resistance”. Hu Zhongxin stated that the existence of "non-standard wires" has long been 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.

He pointed out that in order to standardize the market, to eradicate the inferior “non-standard wires” in the market as soon as possible, it is necessary to first strengthen industrial planning and government guidance, and to manage and make good use of government investment, the competent departments should strengthen the supervision and inspection and supervision, and regulate Market competition order, purify the market environment, wire and cable manufacturers themselves must strengthen self-discipline, construction units must also strictly control the quality of wire and cable. "Once there is no market and no market, naturally no one will come to fraud," he said.

Distinguish the "national standard wire" and "non-standard wire" five-step method 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, and wire breakage often occurs. 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 black material on the white paper, there is more impurity in the copper core.

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, a plastic insulated single stranded copper core with a cross-sectional area of ​​1.5 mm 2 weighs 1.8-1.9 kg per 100 m; a 2.5 mm 2 plastic insulated single stranded copper core weights 3.0-3.1 kg per 100 m; 4.0 Millimetres of plastic insulated single stranded copper wire weight of 4.4-4.6 kg 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 to make consumers gullible and consumers must not be petty and cheap.

Sixth, looking for monopoly. Due to the strong professionalism of cables, many people do not have a clear target brand when buying a cable, but rather follow the recommendation of the store. This gives "non-standard wires" an awkward opportunity, so ordinary consumers are advised to go to well-known cable manufacturers' stores when they purchase wires and cables, which can prevent bad businesses from shoddy.