Improper use of the socket can cause a fire. Fire experiments tell you why

With the increase in electrical appliances, sockets are often used in homes and office areas, but their safety issues are easily overlooked. Many people do not like to pull the plug from the power socket, which is very likely to cause potential safety hazards. According to statistics, about 30% of the fires in China in the past 10 years were caused by sockets, ranking among various causes of fires. Recently, the propaganda personnel of the fire brigade of Lianyungang City, Jiangsu Province and the experimental teachers of Huaihai Institute of Technology passed the experiment and told the public that some unhealthy habits such as plugging the socket in the life and not turning off the power for a long time often cause inestimable losses.

The socket is filled with electrical plugs.

Recently, firefighters discovered in some urban and college student dormitories in urban areas that many people do not take into account the load of the socket and turn off the power of the socket when not in use.

At the home of Mr. Liu, a firefighter saw that the socket on the computer desk was filled with electrical plugs, the eight socket jacks were filled with electrical appliances such as computers, stereos, printers, and wireless routers, and the power light of the socket was also lit.

"I usually use a computer, listen to music, and print some data, so the socket is full of electrical appliances such as printers and speakers. When I do n’t use a computer, I use my mobile phone to connect to the Internet through the wireless network, so the socket is not only full, but also 24 hours. No matter. "Mr. Liu said, he really did not pay attention, this will bring danger.

Firefighters saw a similar situation in a dormitory for a male student in a university in an urban area. In the four-person room, everyone has a socket on their desk, and the socket is al full of plugs. Above the desk is the student ’s bed.

"I really haven't paid attention to the problem of the socket. It is convenient to use it at the socket. You can use it at will." Xiao Wang said that he did not have the habit of turning off the power in time.

Firefighters questioned many citizens about whether they would pull out their plugs when they went out. citizens said that in addition to the habit of pulling out TV plugs, the plugs of other electrical appliances are generally "too lazy to pull out." Various chargers, such as mobile phones and computers at home, are always plugged in.

After 5 minutes of load, the socket wire warmed up quickly and was burnt

In a laboratory of Huaihai Institute of Technology, the experimenter teacher Yang and the firefighters prepared the equipment to be used in the experiment in advance, several sockets, a current test meter, two high-power varistor boxes, and also prepared fire extinguishers. In order to simulate the electrical appliances connected to the socket, what happens when the power connected to the socket is too large?

When the rated power of the socket is reached, there is no obvious abnormal phenomenon in the socket. When the connection power is increased and touched by hand, the wire of the socket begins to soften, the temperature rises significantly, and it feels hot. You can see through the thermometer that in just 5 minutes, the temperature of the socket wire From 31 degrees Celsius to 160 degrees Celsius rapidly, and then a clear smell of burnt smell can be heard, and the wire at one end of the socket begins to smoke. For safety reasons, the laboratory personnel immediately cut off the power. By looking at the socket wires, you can find that the socket wires have been scorched, exposing the copper wires inside.

"It seems that the power of the socket is too large, and it is indeed possible to cause a fire. If this happens in life, the consequences can be imagined, then why does this phenomenon occur?"

Experimenter Yang introduced that from the perspective of sockets, its plugs, wires, switches, one to several sockets are all current limited, "because it will heat, if we exceed the rated power, then its heat will be There will be more, and it will even burn down and catch fire. "

Teacher Yang said that as long as it exceeds the rated value, it will produce, for example, the wires become soft, fire, and some odor. If there are some flammable substances around the wiring board and its wires, then it is easy to cause a fire. Although a small socket is inconspicuous at home, we cannot ignore its danger. "In addition to paying attention to the rated power, we must also develop the good habit of turning off the power in time. Do n’t make it impossible because of the carelessness of the moment. The tragedy recovered. "

"Long-term standby" and "little horse-drawn cart" have big potential safety hazards

According to Director Wang Huahui of the Fire Prevention Supervision Department of the Municipal Fire Brigade, the socket has a main indicator, rated current. It is required that the rated current of the electrical appliance inserted in the socket should not be greater than the rated current of the socket, that is, the "pony to pull the cart" can not be used, otherwise the overload operation will not only cause the socket to heat, short circuit the wire, damage the electrical appliance or even cause a fire. The public should pay special attention to not using high-power household appliances such as air conditioners and microwave ovens in sockets with small rated currents.

Director Wang said that many people have become accustomed to charging equipment plugged into the socket 24 hours, this habit is very bad. Electrical appliances will always be in "standby", and the potential safety hazards are indeed great, especially in some old communities. "If there is no one at home, something is a big deal."

The fire department reminded the public that the quality of sockets and cables in the market is uneven, and there are many inferior products. Some citizens are greedy for small and cheap. They use plug-in boards without quality assurance and connect high-power electrical appliances. Standby state can easily cause fire accidents. Therefore, when using the socket, remember to keep away from the fire source, and pay more attention when charging, "The plug must be plugged with the plug, and the plug should be pulled out after use."

If there is an electrical fire, be sure to turn off the power before extinguishing

The fire department reminds that electrical fires include fires caused by faults in electrical systems; after the fire, electrical equipment and lines that have not yet had time to cut off the power supply or cannot be cut off due to production and living needs; other combustibles catch fire and ignite live electrical equipment, Fire on the line.

If the electrical fire is not handled properly, it may also cause electric shock accidents. Therefore, in order to protect the life safety of fire extinguishers and reduce the spread of fire, the principle of "power off, then fire extinguishing" should be adhered to when fighting electrical fires. If you need to extinguish the fire due to emergency, do not use water or foam fire extinguisher. You can use dry powder fire extinguisher or fireproof equipment such as cotton blanket to wrap the fire electrical appliance to let the fire extinguish. You can also use sand or earth to extinguish the fire. When using a fire extinguisher, it must be remembered that the fire extinguisher cannot be directed at the TV screen. After the screen is burned and cooled, it may explode if it is cold.