PConline Tips Last week, a colleague of Xiao Bian's electric water heater at home suspected that the water heater was on fire because of a short circuit in the wire. Fortunately, it was discovered in a timely manner that an accident was avoided. However, my colleagues are now still having a worry in retrospect. Faced with frequent water heater accidents in the society, Xiao Bian thinks it is necessary to share some misunderstandings about the use of electric water heaters with the majority of netizens, hoping to avoid as many electric water heater accidents as possible and attract the attention of netizens.
Speaking of some serious electrocution accidents, we will investigate the reasons, including the misleading misinformation of individual vendors and the misunderstanding of safety awareness among users. Because the use environment of electric water heaters is rather special, the user is not only in a relatively closed and narrow space, but when the user is in use, the whole body is wet. As long as there is a little leakage current, there may be danger of life. Therefore, fully recognize the electricity The misuse of water heaters is especially important!
Misunderstanding 1: Qualified electric water heater is equal to safe bathing
With the development of electric water heaters in the Chinese market becoming more and more mature, the entire electric water heater industry has claimed that the issue of electricity safety has been fully resolved, and consumers are also more convinced of this statement, including the majority of consumers within Xiao Bian. All believe that the product of the electric water heater is qualified, and the bath is safe. However, in recent years, there have been accidental electric water heater electric shocks that have occurred, and people can not help but rethink: “Is the qualified water heater really safe?â€
Qualified electric water heaters also have potential safety problems?
It is understood that the standard for electric water heaters in China is equivalent to the adoption of the European IEC (International Electrotechnical Commission) standards. This standard requires that the ground wire in the user's home must be good, but because of historical reasons and other factors, there are many buildings in our country that have a poor grounding system, and some buildings even lack a grounding system. Renovation of the wrong line, line aging, private cable, the use of low-quality switch sockets, water pipes when the grounding line, etc., may lead to ground live, causing electric shock accidents.
Therefore, many consumers may not be aware of this, and in this environment of use, even if the electric water heater product passes the IEC inspection, it cannot guarantee the safety of the bath.
Misunderstanding 2: Unplug the power plug, bathing is safe
In view of the electric water heater leakage accident, some safety-conscious users will unplug the power plug and then bath after the water heater is heated. These users' safety awareness is still worthy of recognition, but unfortunately, the user's practice There is also a misunderstanding.
Unplugging the power plug will not necessarily prevent electric shock.
Why is this? Because the water heater is not only connected to the circuit, it is also inevitably connected to the water pipe. In some buildings where the grounding system is not good or there is no grounding system, some people's homes will be connected to the grounding line, so that the water pipe acts as grounding for the building. In this case, if there is a leakage of electricity from a household's home, the entire building's water pipes will be energized. Among the electric water heaters that are being used, although the power plug has been unplugged, the current will still flow through the water pipe. Imported, causing user electric shock accidents.
Misunderstanding 3: There is a leakage protector is not afraid of electric shock accident
Some users may have this idea: "I have a home electric leakage protector, so do not worry about electric water heaters will leak!" To explain these user's errors, we must first understand how the leakage protector works: Power The live and neutral wires in the wire enter the water heater through the leakage protector. In the working state of the water heater, the leakage protector can cut off the power supply within 0.1 second once the internal electrical component of one of the electrical components leaks, preventing the current from continuing to enter the interior of the water heater.
leakage protector
However, the water heater's power cord also contains a ground wire that does not pass through the earth leakage protector. In theory, the ground wire is also installed to ensure the safety of the power supply. However, if the grounding is not reliable, the FireWire ground wire will be reversed during the renovation. Aging and other situations occur, because the ground does not pass the leakage protector, which is the current may be driven directly into the water heater through the ground line, electric shock accidents are still inevitable.
Electric water heater safety use points
After pointing out several misunderstandings about the use of electric water heaters, Xiao Bian felt that it was not complete, but also needed to provide some recommendations for safe use of electric water heaters. We might as well continue to look down.
1, the family of indoor wiring should be reliably grounded, and the grounding resistance value shall not exceed 4Ω. Household outlets, whether single-phase or three-phase, must be grounded to the ground of the power supply, and the grounding of the outlet must not be left empty. If the grounding cannot be connected because of the conditions, please use the product with the electric wall, use the long electric wall (50% longer than the normal electric wall), even if the leakage occurs, the current can be controlled. In the case of about two batteries connected to the dry battery, the danger of leakage is minimized.
2. The outlet of the electric water heater should have a special socket for fixing, and the mobile power supply terminal board cannot be used. The structure, capacity, and jack size of the socket should match that of the electric heater. The socket should be placed above the horizontal position of the outlet of the electric water heater. To avoid the risk of water splashing and creating a short circuit, it is best to use a socket with waterproof protection.
3. When using an electric water heater, do not turn off the power supply through the switch on the socket, because the leakage protection plug cannot work after the power supply of the outlet is turned off, and cannot provide protection in the event of a fault such as live charging of the ground wire.
4. Regularly (generally every week) check the “test†button of the breaker for leakage protection and confirm that the leakage protection plug can work normally.
5, maintenance of clean electric water heater outside, should first cut off the power, do not spray with water, wipe with a soft cloth.
6, if the power cord is damaged, in order to avoid danger, you must use a dedicated power cord provided by the manufacturer, and replaced by professional maintenance personnel.
7. The service life of an electric water heater should not exceed 6 years. If it continues to be used for more than one year, there will be safety hazards and it needs to be replaced in time.
Editor's summary: It is about to enter the winter, the frequency of use of electric water heaters will further increase, in the face of electric water heater electric shock accidents from time to time, we should establish a sense of safety hazards, fully understand the use of electric water heaters and safety Use points for the sake of yourself and your family, away from the relentless engulfing of the "electric tiger."
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