1. Why does the lighting switch have to be connected to the live wire? If the lighting switch is installed on the zero line, although the light is not on when it is turned off, the phase line of the lamp holder is still on, and people will think that the light is not on and will mistakenly think that it is in a power-off state.
In fact, the ground voltage of each point on the lamp is still a dangerous voltage of 220 volts. If people touch these actually charged parts when turning off the lights, it will cause an electric shock accident.
Therefore, all kinds of lighting switches or switches of single-phase small-capacity electrical equipment can only be connected in series on the live line to ensure safety. 2. How to correctly install the single-phase three hole socket? Why? Usually, single-phase electrical equipment, especially mobile electrical equipment, should use three-core plug and its supporting three hole socket.
There is a special protective zero (grounding) jack in three hole socket. When using zero protection, it is very dangerous for someone to directly connect the wiring pile head of this hole with the zero line that only leads into the socket at the bottom of the socket. Because in case the zero line of the power supply is disconnected, or the fire (phase) line and the zero line of the power supply are connected reversely, its shell and other metal parts will also bring the same voltage as the power supply, resulting in electric shock.
Therefore, when wiring, the special grounding jack should be connected with the special protective grounding wire. When zero protection is adopted, the zero line should be led out from the power supply side, and the zero line introduced into the socket should not be used nearby.
3. Why is it forbidden to bury plastic insulated wires directly in the wall? (1) Plastic insulated conductor will age and crack after long-term use, and the insulation level will be greatly reduced. When the line is overloaded or short-circuited, it is easier to accelerate the insulation damage. (2) Once the wall is damp, it will cause a large area of leakage and endanger personal safety.
(3) Plastic insulated wires are directly buried, which is not conducive to line maintenance and repair. 4. Why should I use a leakage protector? Leakage protector, also known as leakage protection switch, is a new type of electrical safety device. Its main purpose is: (1) to prevent electric shock accidents caused by leakage of electrical equipment and electrical lines.
(2) To prevent single-phase electric shock accidents in the process of electricity utilization. (3) Cut off the single-phase grounding fault in the operation of electrical equipment in time to prevent electrical fire accidents caused by leakage.
(4) With the improvement of people's living standards, the number of household appliances is increasing. In the process of using electricity, personal electric shock and fire accidents caused by defects in electrical equipment, improper use and unfavorable safety technical measures have brought undue losses to people's lives and property. The appearance of leakage protector provides a reliable and effective technical means for preventing all kinds of accidents, cutting off power supply in time and protecting equipment and personal safety. 5. What is the main cause of electric shock accident? Statistics show that the main causes of electric shock accidents are: (1) lack of knowledge about electricity safety, flying kites near high-voltage lines and climbing high-voltage poles to dig nests; After the low-voltage overhead line is disconnected, connect the fire line by hand without power failure; Touch the charged body by hand for live wiring at night; Touch the broken rubber knife switch with your hand.
(two) in violation of the operating rules, without taking necessary safety measures, unauthorized connection of lines or electrical equipment; Touch damaged equipment or wires; Wrong installation of live equipment; Electrified lighting; Online maintenance of power tools; Live mobile electrical equipment; Twist a light bulb, etc with wet hands. (3) The equipment is unqualified and the safety distance is not enough; The grounding resistance of two-wire and one-ground system is too large; The grounding wire is unqualified or disconnected; Insulation damage to wires, etc.
(4) The equipment is in disrepair, the line is blown off by strong wind or the pole is not repaired in time; Rubber breaker bakelite is damaged and not replaced in time; The damage of the motor lead makes the shell charged for a long time; The porcelain bottle is damaged, which makes the phase wire and the pull wire short-circuited, and the equipment shell is charged. (5) Due to other accidental reasons, I walked at night and ran into a broken live wire on the ground.
6. What rescue measures should be taken in case of electric shock? When an electric shock accident occurs, while ensuring the rescuer's own safety, we must first try to make the electric shock victim quickly get rid of the power supply, and then carry out the following emergency repair work. (1) Untie the tight clothes that hinder the breathing of the electrocuted person.
(2) Check the mouth of the person who gets an electric shock and clean up the mucus in the mouth. If there are any dentures, remove them. (3) immediately on-site rescue. If breathing stops, rescue with mouth-to-mouth artificial respiration. If the heart stops beating or vibrates irregularly, use artificial chest compression to rescue it.
Never interrupt for no reason. If there is a second person besides the rescuer at the scene, the following work should be done immediately: 1) Provide first aid tools and equipment.
2) convince others at the scene. 3) Keep sufficient lighting and air circulation at the site.
4) Report to the leader and ask the doctor to come to the rescue. Experimental research and statistics show that 90% patients can be saved if treatment is started from 1 min after electric shock. Only 10% chance can save lives if rescue is started 6 minutes after electric shock; But from 12 minutes after electric shock, the possibility of saving lives is extremely small.
So if you find someone getting an electric shock, you should race against time and take all possible measures. 7. What measures are there to use electricity safely at home? With the popularization and application of household appliances, it is very important to correctly master the knowledge of safe electricity use and ensure the safety of electricity use.
(1) Don't buy fake and shoddy "three noes" household products. (2) When using household appliances, there should be a complete and reliable power cord plug.
Household appliances with metal shell should be protected by grounding. (3) Switches and fuses cannot be installed on the ground wire and zero wire.
It is forbidden to connect the ground wire to the tap water and gas pipeline. (4) Don't touch the live equipment with wet hands, and don't wipe the live equipment with wet cloth.
(5) Don't connect wires privately, and don't move live equipment casually. (6) When repairing household appliances, you must first disconnect the power supply.
(7) When the power cord of household appliances is damaged, it should be replaced immediately or wrapped with insulating cloth. (8) When household appliances or wires catch fire, disconnect the power supply first, and then put out the fire.
8. How to prevent burning household appliances? The rated voltage of common household appliances is 220 volts, and the normal power supply voltage is around 220 volts. If the power supply voltage in the power supply line rises instantly due to natural disasters such as lightning strike, the zero line of the three-phase unbalanced household line is broken due to years of disrepair, or the phase voltage rises due to human misconnection, the current will increase, and household appliances will burn out due to overheating.
To prevent the burning of household appliances, we should start from the following aspects: First, try to disconnect the power supply when the electrical equipment is not in use; The second is to transform the old and disrepair.
2. What is the common sense of safe electricity use in rural areas?
(1) Consciously abide by the rules and regulations on safe electricity use, apply for electricity use, find an electrician for installation and maintenance, and do not connect electricity without permission.
(2) No private power grid can be set up to guard against theft, fishing, hunting or catching rats. (3) Hook wires, broken wires, underground climbing wires and wires with unqualified insulation shall not be used to connect electricity. (4) The light wire should not be too long, and the lamp holder should be fixed, and it should not be pulled around as a flashlight.
(5) Do not climb or cross the fence or fence of power facilities. (6) Don't throw objects at power lines and transformers, and don't shoot, quarry, repair houses, erect derricks or cut down trees near power lines.
(seven) do not build houses, dig wells, pile firewood and plant trees under power lines.
3. How to use electricity safely in rural areas
In rural areas, the knowledge of electricity safety has not been well popularized, and sometimes accidents will happen if you are too careless.
Therefore, everyone must pay attention to electricity safety and improve their knowledge of electricity safety. It is very dangerous to set up a private power grid, which may happen if others or themselves do not pay attention.
It is also forbidden to connect lights, wires and electrical appliances without authorization, and there is no professional safety guarantee. If there is a * * * line or a wrong socket, it is easy to have an accident. Sometimes people like to catch fish with electricity, which is also very dangerous. Don't take it lightly.
It is forbidden to use electricity as a hook to illuminate a line, and to use unqualified wires and electrical equipment to connect with electricity. In order to use electricity safely, we must first apply for rural electricity, find an electrician to install and maintain it, and consciously abide by the rules and regulations for safe electricity use.
It's best not to build houses, drill wells, plant trees or pile firewood under power lines, dig holes and collect soil near poles, and don't damage stay wires to avoid hanging upside down and disconnection of poles, so as to avoid electric shock accidents. Don't go near the broken wire, assign special personnel to guard it, and notify the electrician in time to deal with it.
In household appliances, the iron wire and the wire for drying clothes should be kept at a sufficient distance, and they should not be intertwined, and clothes should not be hung or hung on the wire. Don't touch the metal shell of household appliances such as lamp holders and sockets with your hands. If it is damaged, aged or leaked, please find an electrician to repair and replace it.
The metal shell of household equipment should be reliably grounded. If you find someone getting an electric shock, quickly pull down the switch, disconnect the power supply, or connect the wires with a dry wooden stick or bamboo pole.
Immediately after that, use proper artificial respiration or chest compressions for on-site first aid, and do not give cardiotonic.
4. What is rural electricity safety knowledge?
Electricity is a magical natural phenomenon and an important energy source in today's society. It was first discovered by American scientist Franklin.
The discovery of electricity is legendary, which is the well-known story of flying kites in rainy days. Franklin was inspired by lightning in rainy days. He flew a kite with a key in the thunderstorm, and then connected the other end of the kite line to a Wright bottle to get the charge, thus proving the existence of electricity.
Edison, Faraday, Siemens and others have made outstanding contributions to the application and development of electric energy. Edison invented the electric light, which further introduced electric energy into human daily life. Faraday discovered the phenomenon of electromagnetic induction, proved that the magnetic field can generate current, and predicted the birth of the generator. Siemens improved the generator by electromagnet, and made a new type of generator that can generate strong current, which accelerated the popularization of generators and created a new era of electrification.
The invention of the generator directly contributed to the second scientific and technological revolution, brought mankind into the "electrical age" and made social life more colorful. Electricity has penetrated into every aspect of people's lives, and people are dealing with it almost anytime and anywhere.
However, the temper of electricity is hard to ponder. Sometimes it is as gentle as a sheep, and sometimes it is as fierce as a tiger. Due to the carelessness of human beings, they are often taken lightly and ignored, resulting in countless deaths every year, causing very serious casualties and economic losses.
Therefore, only the rational and safe use of electric energy can ensure the safety and comfort of people's lives. In any case, the safe use of electricity is a major event.
5. Who has a documentary about rural electricity safety (preferably with a story)?
Safe electricity use in rural areas-Video-Youku Video
Video Download of Rural Safe Electricity Use /243/4_24396
6. What are the regulations for rural electricity installation?
Are you installing a household electricity meter? For the convenience of management and beauty, the electric power department has regulations, and it is not how to install it. Just like building a house in a city, it is not built according to your own wishes, but also in line with the planning and requirements of relevant departments such as urban construction.
The electric power department has regulations on the technology and function of the switch, and the installed household meters are all tested, and the wiring also has relevant requirements. After installation, it can be used only after it is qualified. If you buy the switch yourself, you can, but the manufacturing process and function of the switch must meet the requirements of the power sector, and the testing cost of the household electric meter should be paid by yourself. After installation, you may not pass the acceptance test, and you will have a lot of trouble and the price will not be much cheaper.
And you are not qualified to go to Ann in person (power work requires relevant qualifications and certificates). Do you feel dizzy after talking so much? Generally speaking, if it is an individual user, it is best to find an electrician to avoid a lot of trouble and save a lot of time.
If you are a big user or a multi-user, you can consider looking for something else.