Small knowledge of lightning protection and safety

There are all kinds of rain in nature, including gray rain, continuous rain and downpour in Mao Mao ... Rainstorm weather is dangerous, but not terrible. As long as all kinds of preventive work are done well, there will be no danger. Let's learn about lightning protection safety together.

1, how to use home appliances when it thunders?

Cut off the power supply and unplug the telephone. At the same time, don't touch gas pipes, water pipes and all kinds of charged devices, and don't shower with a shower when there is lightning, because huge lightning will attack the shower along the water flow. Don't use radios and televisions with external antennas, and don't answer the phone. Never use a mobile phone when there is thunder and lightning.

2. What should we do if we are outdoors when there is thunder and lightning?

1). Don't run, don't open your mouth, and get down immediately. At the same time, put your hands on your knees, keep your head as low as possible, and put your feet together to reduce the harm caused by stepping voltage.

2). Don't take shelter from the rain under the big tree. It's best to stay 5 meters away from the tree when it thunders.

3) Don't stay near water bodies (rivers, lakes, oceans, ponds, canals, etc.). ) and depressions, and quickly went to dry houses nearby to shelter from the rain. If you can't find a house in Shan Ye, you can take refuge under rocks or in caves.

4). Don't stay in the thunderstorm with metal objects. The metal objects carried with you should be temporarily placed 5 meters away, and then picked up after the lightning activity stops.

5). Don't touch or get close to lightning protection grounding wires, water pipes, electrical grounding wires, tree trunks and other objects that may be charged due to lightning strikes, so as to prevent contact with lightning strikes and side lightning strikes.

6). Don't answer your cell phone in thunderstorm weather.

7). It is best to wear rubber shoes when going out in thunderstorm weather, which can play the role of heat preservation.

8). If you can't find a suitable lightning protection place, find a low-lying place to squat down, try to lower the center of gravity and reduce the contact area between the human body and the ground. If you have more than one person, the distance between them should be at least 6 meters, because many people standing together are likely to be struck by lightning.

3. What things should not be held by hand and what sports should not be carried out in the wild?

You should not carry umbrellas, metal tools, badminton rackets, golf clubs and other items on your shoulders. Don't swim or engage in other water sports. Not suitable for outdoor ball games, mountain climbing, horse riding and other sports. Leave the open areas such as the water surface as soon as possible and find a place with lightning protection facilities to escape. It is not advisable to drive a motorcycle or ride a bicycle, and it is forbidden to rush when it thunders.

4. How to prevent lightning indoors?

Close doors and windows and try to stay away from doors and windows, balconies and external walls. Do not approach or touch any metal pipes in the room, including water pipes, heating pipes, gas pipes, etc. Try not to use household appliances, including TV, computer, wired telephone, active radio, refrigerator, washing machine, microwave oven, etc. In a room without lightning protection facilities. It is recommended to unplug all power plugs. Don't take a bath with a solar water heater in thunderstorm weather. In case of lightning fire, cut off the power supply quickly and give an alarm quickly.

5. How to give first aid to lightning burns?

When lightning strikes, the thermal effect of current will cause electric burns and carbonize the human body into coke. If the clothes of the person who is struck by lightning catch fire, you can splash water on the injured person, or wrap the injured person with a thick coat and blanket to put out the fire. For those who have stopped breathing and heartbeat, cardiopulmonary resuscitation should be performed first, and then the burn wound should be treated. Cool the wound with cold water and then cover it with dressing. If there is no dressing, wrap it with clean cloth, clothes and so on. Timely transfer to local hospital for treatment and take anti-shock measures.

Expand: Why do you turn off the computer when it thunders?

Because the computer network is wired, once the cable receives lightning, it will enter the computer through the line, and the computer will be damaged. If lightning strikes a section of electrical equipment in a residential area or outdoors, it will cause the voltage of this section to rise instantly, thus causing serious damage to household appliances. Lightning waves can also enter the TV through closed-circuit TV lines, thus damaging the TV. Therefore, it is suggested that when lightning strikes, it is best to turn off TV, computer, refrigerator, air conditioner and other electrical appliances. In order to prevent the voltage from being too high, unplug the power socket (be sure to unplug it, don't turn off the power casually! ! ), the TV should be unplugged from the closed wire socket.

Matters needing attention in using computer when it thunders.

1. It is safer to use household appliances when the building is equipped with corresponding lightning protection devices (the lightning rod leads the lightning underground) according to the requirements of the specification. Users can check whether the building where their house is located has a lightning protection device certificate or a lightning protection device test report to prevent accidents.

Generally speaking, high floors are easily struck by lightning. Pay attention to close the doors and windows to prevent lightning from hitting the room directly or preventing the invasion of side lightning and ball lightning. Disconnect the line and unplug the power plug. Don't let the TV and computer wait. Introduce lightning into the room. Don't use showers and solar water heaters, because the water pipes are connected with lightning protection and grounding, and the low floors are relatively safe.

3. Generally, when the thunder is relatively small, surfing the Internet is still very safe when it thunders, and the probability of being struck by lightning is quite high and very low; However, when thunder is rolling, outdoor high-voltage lines are very vulnerable to strong lightning strikes, and many power stations may lose power. At this time, if you still play computer, the probability of being struck by lightning is much higher. The editor strongly recommends turning off the computer power.

With the continuous development of science and technology, there are more and more electrical appliances in our lives. Electrical appliances are more dangerous in thunderstorm weather. Because electrical appliances can conduct electricity. Moreover, computers are also electrical appliances, so for safety reasons, people will turn off computers in thunderstorm weather. This is also good for computers, because computers are expensive, and if they are damaged by lightning, they will need a lot of money to repair them. So people should try not to use computers in thunderstorm weather.

Why is thunder harmful to computers?

When it thunders, lightning generates high-voltage electricity, which will be transmitted to the user's electrical appliances along with the wires. At this time, if the electrical appliance is in use, the high voltage generated by lightning will break through the electrical equipment.

There are two kinds of mines that can cause harm:

One is: ordinary thunder;

The other is the floor mine. Don't worry about ordinary thunder, it just shows off in the sky, which has little effect on electrical equipment.

There are two kinds of damages caused by ground lightning to computers:

First, the possibility of large current burning directly through the conductor is very small, which can be ignored, one in a million.

Second, lightning generates powerful electromagnetic waves and destroys computer hard disks. This possibility is also very small, but it cannot be ignored; If you love your computer, you'd better turn it off. Although the probability is small, maybe you will win the lottery.

Strong lightning voltage will make the semiconductor integrated circuit instantly break down and lose its original polarity, so the integrated circuit will be damaged. The computer is composed of a large number of integrated circuits. If all the integrated circuits are broken, the computer will be broken, and the navigation to this webpage has been cancelled. There is also the high voltage of lightning. Instantaneous high-voltage discharge will decompose and burn nitrogen in the air, releasing a lot of heat to burn computers and break down circuits. Moreover, the type of lightning belongs to static electricity, and everyone who knows the circuit knows that static electricity is the first killer of integrated circuits and does great harm to computers.

Lightning has the opportunity to generate instantaneous high voltage on the wire. At this time, high voltage may break through electrical components, which may lead to explosion in severe cases and burn out the safety tube in minor cases. Therefore, if it is an area with severe thunder, sometimes even the lights have to be turned off, because it may suddenly explode and hurt people nearby. Of course, if the thunderstorm cloud is high, it has no effect. Generally, thunder sounds scary and the clouds are very low. At this time, it is strongly recommended to turn it off, otherwise the probability of being struck by lightning is high, and the damage of lightning to the equipment is devastating. It is very expensive to replace bad parts for maintenance.