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Unqualified quality of wires, switches, and sockets will not only cause fires, but may even endanger the life of the moon and consumers. In the third quarter of this year, the Consumer Protection Office of Changzhou Industrial and Commercial Bureau conducted quality inspections on the wires, switches and sockets in the circulation area of ​​the city. Among them, the pass rate of wire and cable was 52%, and the pass rate of switch sockets was only 20%.
This time, a total of 25 batches of wire and cable were inspected, and 13 batches were qualified, and the pass rate was only 52%. The main quality problems exposed during testing are:
The thinnest thickness of the insulation. The insulation of the wire and cable is uneven in thickness. Over time or in the sun and rain, the insulator is easily broken, the conductor is exposed, the electric shock is extremely likely to occur, and the short circuit, power failure, and damage to the electrical equipment are caused.
Conductor resistance. If this indicator is unqualified, it will cause serious heat generation during the use of wires and cables, and accelerate the aging of insulation. It is a major fire hazard for accidents such as fires.
Insulation and sheath mechanical properties. If this indicator is unqualified, the insulator will be broken during installation, and the live conductor will be exposed, which will endanger the user's personal safety.
Withstand voltage test and insulation resistance test. Failure of this project will reduce the product's safety rating and will not withstand the withstand voltage and insulation resistance tests.
Sign. The failure of this indicator will be misleading to consumers to a certain extent, posing a potential danger to the use of consumers.
This test fully demonstrates that some of the wire and cable products sold in the circulation area of ​​the city are of inferior quality and have many problems, and the problem of conductor resistance is particularly serious. The direct consequence of the failure of the project is that the wire overheats during use, damaging the insulation plastic, causing a short-circuit fire and causing a fire. This is mainly because some enterprises have shrunk copper conductors, which account for nearly 80% of the cost of raw materials, to reduce the actual cross-sectional area, or use impurity copper and copper. In order to ensure the safety of citizens' consumption, the city's industrial and commercial departments will increase the intensity of market use and vigorously crack down on counterfeit and shoddy goods. At the same time, consumers are also reminded that when purchasing electric wires, they should see the product packaging certificate and the mark on the wire. All wires and cables that implement GB5013, JB/T8734, GB5023, JB/T8735 standards should have CCC mark and certification number. The certification number can be checked online. In addition, the certificate should also have the relevant information such as model, specification, rated voltage, length, manufacturing period, certification number, inspection, implementation standard, factory name, factory address, etc., and pay attention to the model number on the certificate and the model number on the line. Is it consistent?
In the third quarter of this year, the Consumer Protection Department of Changzhou Industrial and Commercial Bureau conducted a sample inspection of the low-voltage electrical appliances used in the construction site. A total of 5 batches of switch sockets were obtained, and 1 batch was qualified, and the pass rate was only 20%. In this sampling, the unqualified items are mainly concentrated on the heat resistance test, the flame resistance of the insulating material, and the force required to pull out the plug. Among them, four batches of samples were planted in the heat resistance test due to the use of low-grade raw materials of low quality and low quality recycled plastic. If a consumer purchases such a product, a safety accident such as a short circuit or a leakage may occur. This test also found that some manufacturers deliberately use recycled materials or untreated raw materials instead of normal materials in order to reduce production costs, so that the insulating parts of fixed live parts can not withstand 850 ° C, the panel can not withstand the 650 ° C glow wire Flame resistance test. This type of non-combustible socket can cause serious fire hazards once it is used. Such problems reflect that some developers ignore the safety of people's lives and property, and use inferior appliances in large quantities in engineering to reduce costs.
In this regard, the industry and commerce department reminds consumers that the purchase of switches should be kept in mind five: look at the signs. Check whether the product indicates the company name, specification model, rated voltage, rated current value, power supply property symbol and related warnings, and whether there is a 3C certification mark. Look at the appearance. The surface of the socket should be smooth and should not be inclined or uneven when fastened to the wall. Selected use. It is best to use a socket with a slightly larger current and less than five sets of sockets. Try to tighten. The socket should be plugged and unplugged smoothly, preferably with a protective door. Test flame retardant. Do a burning test on the core components to see if the insulation is flame retardant. If there is no condition, from the appearance, the good material is generally hard and hard to scratch, and the structure is tight and the weight is heavy after forming. In addition, the use of the socket is too high or there is a fire in the tiger, the plug and the socket are not in good contact, and when the plug is too loose or too tight, it should be stopped and replaced in time.
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