5-10 shocks per year caused deaths, mostly due to improper installation, leakage of plugs and sockets
Water heater installation, not so simple
Is your home's water heater safe? Yesterday morning, the Guizhou Provincial Product Quality Inspection Institute, the Provincial Mechanical and Electrical Quality Inspection Institute, and the Xihu Road Community Service Center in Nanming District held a 3.15 quality safety community service activity.
The reporter learned from the activity that since 2011, due to unlicensed or irregular installations, water heaters have leaked electricity. In the province, 5-10 water heater electric shocks have occurred every year.
Case
The water heater leaked and the couple died
On the same day, the staff publicized the relevant knowledge of jewellery, food, electrical appliances, etc. to the citizens, and on the spot identified the real and fake wine and jewellery. The staff of the Electronic and Electrical Department of the Provincial Electromechanical Quality Inspection Institute also came to the residents' homes to check whether the installation of the water heaters used by the residents was free of charge and whether there was any leakage.
Yang Yong, deputy director of the Electronic and Electrical Department of the Provincial Electromechanical Quality Inspection Institute, said that the installation of the water heater should pay special attention. Only plastic hoses can be connected to the water heater. Do not use metal hoses to connect directly to the water heater. This is easy to leak electricity and cause damage to the human body. hurt.
He told reporters that in June 2015, when a young woman in the Jinsha County of Bijie took a shower at home, her husband who was watching TV in the living room suddenly heard the cry for help. When he immediately opened the door of the bathroom and rushed in to save people, unexpectedly, due to the leakage of the water heater, the husband and wife were electrocuted.
Yang Yong said that after the identification, the accident was caused by improper installation of water heaters and leakage. It is understood that after the homeowner buys the water heater, he will install it himself to save the installation fee of 150 yuan. However, because the parties did not understand the electricity, the fire line was connected to the ground wire, causing the water heater casing to be directly charged.
"More importantly, because the male owner did not understand the electricity, he did not turn off the power before saving the person, but directly rushed in, so the two men died together." Yang Yong said that since 2011, the annual mechanical and electrical quality inspection The hospital will receive 5-10 identifications of deaths caused by water heater electric shocks, and most of them are caused by improper installation and leakage of plugs and sockets.
market
Most of the merchant installers are not qualified
Electric water heaters are an essential household appliance in the home. Since 2011, China's annual sales volume has reached 17 million units, with an annual growth rate of 10%.
It is understood that at present, there are no electric water heater manufacturers in our province, all of which come from outside the province. The consumer groups mainly come from domestic households, and a small number of hotel guest houses, student dormitory, etc. After purchase, the dealers or manufacturing companies are responsible for the installation. Qualified personnel are installed and individual users are installed for themselves.
How about the installation of Guiyang water heater? Yesterday, the reporter went to the major shopping malls in Guiyang and found that there are many merchants selling water heaters. Each has one or two fixed installers, but these installers are all found in the market. A water heater costs 100-200 yuan.
Spot check
There are 16 batches of 30 household installation conditions at risk
Yang Yong said that the water heater is a live working product, so the installation of the water heater can not be ignored, must be installed by qualified personnel, and can not buy cheap inferior water heaters, socket boards.
Be sure to ground the wire during the installation process. In this way, once the water heater leaks, it can be released in time.
"But in reality, many residential buildings, especially old residential buildings, have no ground wire. Once the water heater cannot leak, it will cause electric shock and casualties." Yang Yong said that the most important thing is that the water heater installer is required. Must be certified to work, but in order to save costs, many dealers are unqualified personnel who are randomly found in the market, thus laying a big safety hazard for the water heater.
Most of the electricians found in the market use inferior wires and cables. Once the contact temperature is too high, the wires and cables will deteriorate.
In May 2015, the Provincial Bureau of Quality and Technical Supervision organized and implemented the provincial-level risk monitoring of the installation and use of electric water heaters, and inspected and tested the installation and use of 30 batches of 30 households. situation. Among them, 16 batches of households are at risk of installation and use, and the problem detection rate is 53.3%. The risk indicators are mainly connected directly to the water heater and the mixing valve, no protective grounding measures, the plug and socket are not tightly coupled, the phase and neutral lines are not installed correctly, and the mobile socket is used.
Yang Yong said that it is not clear which department is supervising the workers who install water heaters. He hopes that the relevant departments will clearly define the supervision units and regulate the installation of water heaters as soon as possible. At the same time, relevant departments should regularly supervise and inspect the protection and grounding measures for residential houses, and find problems in time for rectification and improvement, thereby reducing casualties caused by improper installation.
Tips
Water heater installation precautions
1. The water heater is connected to the mixing valve. When the electric water heater leaks or the outer casing is charged and there is no grounding protection, the water heater and the mixing valve are connected by a metal pipe, and the person touching the mixing valve current will quickly cause fatal injury through the human body.
2. Protection grounding measures. The lack of protective grounding measures has caused major hidden dangers in the installation and use of electric water heaters.
3. Plug and socket insertion condition. If the plug and socket are not tightly inserted, heat will be generated, which may cause short circuit, electric leakage and fire.
4. Phase and neutral installation. The misalignment of the phase line and the neutral line may cause the grounding pole to be charged. If it is used in an environment without grounding measures, it may cause electric shock and death.
5. Power supply mode. The installation of electric water heaters must have independent sockets. It is easy to cause line and power mismatch through the transfer of mobile sockets, which is prone to heat generation, leakage short circuit and combustion.
6. Do not connect the metal hose directly to the water heater, otherwise leakage will occur.
7. The inner center pole of the socket and the grounding pole cannot be connected together. If they are connected together, when the phase line and the neutral line of the external power supply line change (ie, the phase line changes to the neutral line and the neutral line), the water heater plug and the socket are inserted, and the water heater housing is caused by the protective grounding wire in the water heater power line. Charged, and due to the lack of protective grounding, an electric shock accident.
8. When handing over the house, check whether there is a grounding pole and ask the developer to issue a report on the grounding resistance test of the community.
9. The electric water heater should not be installed by yourself. It must be installed by an installation qualified professional.
10. For users of storage-type electric water heaters who cannot confirm whether there is any risk or risk prevention measures, they can be heated and then pulled out of the plug and then used.
11. When using the booster pump, always check whether the insulation is damaged. If it is damaged, it should be treated or replaced in time. Otherwise, the water heater casing, mixing valve and shower connected to the metal pipe will form an electrical connection. The power supply socket is not protected from grounding, resulting in an electric shock during use.
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