Commentary for primary school students on basic knowledge about safe use of electricity

1. Questions on safe use of electricity for primary school students

1. Do not touch power switches and electrical appliances with wet hands to avoid causing ( ).

2. Do not connect too many plugs to the same socket, because when the wire socket is overloaded, it is easy to cause wires ( ).

3. Do not touch the electrical switch when taking a bath, because water is easy to conduct electricity, so in case of electric leakage, it is easy to cause ( ).

4. When you want to check or repair electrical appliances, please turn on the power supply ( ) first.

5. Do not insert metal objects into sockets at will, because metal objects are easy to conduct electricity, and the current will be transmitted to your body along the metal, causing ( ) danger.

6. If there are children at home, please do not let them use the socket as a toy or insert their fingers into the socket jack to avoid causing ( ).

7. Household electrical appliances and wires should be avoided in wet places, and do not stand in ( ) when starting electrical appliances.

8. The plug must be completely inserted into the socket before use, because if the contact is poor, it will cause ( ).

9. When the electric heater or electric iron is not in use, the plug should be pulled out and the power supply should be cut off to avoid fire caused by ( ).

10. When purchasing electrical appliances, you should choose electrical appliances that are energy-saving and meet the standards; before using new electrical appliances, you must read the ( ) book carefully to understand the correct use method. The voltage and current of the new electrical appliances must be consistent with the power supply. consistent with each other.

2. True or False Question (3*10=30 points)

1. Contact the power supply with a certain part of the human body. ------------------------( )

2. Use wet hands to plug in the power plug.

3. Various electrical appliances, plugs and sockets, wires, and lights can be used even if they are damaged or aged. -------------------------------------------------- --------( )

4. Primary school students can play electronic games privately. ----------------------------------( )

5. Metal products can be used to directly contact the power supply . -------------( )

6. If the wires on the roadside have fallen off, you don’t have to avoid them when you see them. -------( )

7. Do not bake clothes on electric heating equipment. ------------------( )

8. Take good care of electrical facilities and do not fly kites near overhead wires and distribution transformers.

-----------------------( )

9. Do not place the clothes drying pole on the wire . ----------------------------( )

10. It is strictly prohibited to set up private power grids to prevent theft, hunting, rat-catching and Fishing with electricity. ----( )

3. Short answer questions (10*4=40 points)

1. Why can’t you touch a live switch with wet hands?

2What to do if an electrical fire occurs?

2. Common sense of safe electricity use for primary school students

1. Do not touch power switches and electrical appliances with wet hands to avoid causing ( ).

2. Do not connect too many plugs to the same socket, because when the wire socket is overloaded, it is easy to cause wires ( ).

3. Do not touch the electrical switch when taking a bath, because water easily conducts electricity, so if there is an electric leakage, it is easy to cause ( ).

4. When you want to check or repair electrical appliances, please turn on the power supply ( ) first.

5. Do not insert metal objects into sockets at will, because metal objects are easy to conduct electricity, and the current will be transmitted to your body along the metal, causing () danger.

6. If there are children at home, please do not let them use the socket as a toy or insert their fingers into the socket jack to avoid causing ( ).

7. Household electrical appliances and wires should be avoided in wet places, and do not stand in ( ) when starting electrical appliances.

8. The plug must be completely inserted into the socket before use, because if the contact is poor, it will cause ( ).

9. When the electric heater or electric iron is not in use, the plug should be pulled out and the power supply should be cut off to avoid fire caused by ( ).

10. When purchasing electrical appliances, you should choose electrical appliances that are energy-saving and meet the standards; before using new electrical appliances, you must read the ( ) book carefully to understand the correct use method. The voltage and current of the new electrical appliances must be consistent with the power supply. consistent with each other.

2. True or False Question (3*10=30 points)

1. Contact the power supply with a certain part of the human body. ------------------------( )

2. Use wet hands to plug in the power plug.

3. Various electrical appliances, including plugs and sockets, wires, and lights, can be used even if they are damaged or aged. -------------------------------------------------- --------( )

4. Primary school students can play electronic games privately. ----------------------------------( )

5. Metal products can be used to directly contact the power supply. . -------------( )

6. If the power line on the roadside has fallen off, you don’t have to avoid it when you see it. -------( )

7. Do not bake clothes on electric heating equipment. ------------------( )

8. Take good care of electrical facilities and do not fly kites near overhead wires and distribution transformers.

-----------------------( )

9. Do not place the clothes drying pole on the wire . ----------------------------( )

10. It is strictly prohibited to set up private power grids to prevent theft, hunting, rat-catching and Fishing with electricity. ----( )

3. Short answer questions (10*4=40 points)

1. Why can’t you touch a live switch with wet hands?

2What to do if an electrical fire occurs?

3. Electricity safety knowledge for primary school students

How to use electrical appliances safely? Nowadays, more and more household appliances such as televisions, refrigerators, washing machines, electric irons, hair dryers, and electric fans have entered homes.

When using household appliances, in addition to paying attention to the safe use of electricity, you should also pay attention to the following points: 1. Various household appliances have different uses and different methods of use, and some are more complicated. General household appliances should be learned to use under the guidance of parents, but dangerous appliances should not be used alone.

2. If you find that the appliance emits smoke, sparks, or a burnt smell during use, you should immediately turn off the power switch and stop using it. 3. Hair dryers, rice cookers, electric irons, electric heaters and other electrical appliances will emit high heat during use. Care should be taken to keep them away from flammable items such as paper and cotton to prevent fires. At the same time, care should be taken to avoid burns when using them.

4. Avoid using electrical appliances in humid environments (such as bathrooms), and do not let electrical appliances get wet or damp. This will not only damage the electrical appliances, but also cause the risk of electric shock. 5. The blades of electric fans and the dehydration barrel of washing machines rotate at high speed during operation. Do not touch them with hands or other objects to prevent injury.

6. In the event of a thunderstorm, stop using the TV and unplug the outdoor antenna to prevent lightning strikes. 7. If electrical appliances are left unused for a long time, they are easily damaged by moisture and corrosion. They need to be carefully inspected before reuse.

8. When purchasing household appliances, choose qualified products with reliable quality.

4. Messages for safe use of electricity for primary and secondary school students

Slogans for safe use of electricity

1. Although electricity has a wide range of uses, it still has shortcomings.

It’s not safe to touch something dangerous. It can be said that it’s half good and half bad.

2. Understand the convenience of using electricity, and disobeying it will cause disaster.

Cable fires can spread easily and can be avoided by working carefully.

3. Don’t act recklessly if you don’t understand the operation. If you act recklessly, things will happen.

It is not shameful to ask questions without shame, but it is frowned upon to look fat.

4. Don’t be careless when connecting the switch to the fire. If the power is turned on, connect it first.

Although it is said that you should not rush to remove the battery, and do not be bold when testing the power of the battery.

5. Insert the ground wire into the cable, and do not short-connect the two live wires.

Don’t connect the ground and fire wires backwards, and reconnect the power after finishing the work.

6. When closing, it must be done three times, one long and two short first.

Don’t be annoyed if you insist on doing it regularly, and you will regret it later if something goes wrong.

7. If the cable leaks, replace it in time, do it resolutely and don’t delay.

If the cables are dragged on the floor or messy, they must be tied up to maintain the suspension.

8. Roll the car away and try to turn, shout loudly, and ask the person to move aside before turning.

It is not enough to be careless when working carefully.

9. Check the safety list to avoid electric shock and keep yourself healthy.

10. You only live once, and safety is with you throughout your life.

11. Safety is connected to you, me and him, and peace and happiness depend on everyone.

12. If you show mercy to traffic violations, accidents will show no mercy to you.

13. Safety comes from long-term vigilance, and accidents come from inspection paralysis.

14. No matter how busy you are with production, safety should never be forgotten; human life is at stake, safety comes first.

15. Everyone is responsible for safe production; abide by rules and disciplines to ensure safety.

16. Accidents are not difficult to prevent, the key is to abide by the rules.

17. Take one more look and you will be safe; take one more precaution and you will have fewer accidents.

18. Dangerous items should be placed in isolation; they should be clearly marked and pay attention to fire prevention.

19. Fire protection facilities should be inspected frequently to eliminate hidden dangers and prevent accidents.

20. Operate mechanical equipment in accordance with regulations and always pay attention to efficiency and safety.

21. Strengthen fire safety training and improve your and my safety awareness.

22. Everyone is responsible for safety in production, and hidden dangers of accidents are prevented at every turn

23. Safety in production is not left to chance, as illegal operations can cost lives

24. Eliminate all safety hazards , to ensure the safety of production work

25. Strictly abide by fire safety regulations and strive to do a good job in safe production

26. Implement safety responsibilities at all levels and improve safety management levels

< p> 27. Establish a corporate safety image, promote safe and civilized production, take responsibility for safety, and always contribute to the country.

5. How primary school students can use electricity safely

1. Learn to read signs for safe use of electricity

Clear and unified signs are an important measure to ensure safety in electricity use . Statistics show that many electrical accidents are entirely caused by inconsistent signs. For example, because the colors of the wires are inconsistent, the phase wires are mistakenly connected to the chassis of the equipment, causing the chassis to be electrified and causing casualties at the contacts.

Logo is divided into color logo and graphic logo. Color marks are often used to distinguish wires of different properties and uses, or to indicate the safety level of a place. Graphic signs are generally used to warn people not to approach dangerous places. To ensure safe use of electricity, color signs and graphic signs must be used strictly in accordance with relevant standards. The standards adopted by my country's safety color standards are basically the same as the International Standard Draft (ISD). The following safety colors are generally used:

1. Red: used to mark prohibition, stop and fire protection, such as signal lights, signal flags, emergency stop buttons on machines, etc. are all expressed in red. Prohibited" message.

2. Yellow: used to mark danger. Such as "beware of contacts", "pay attention to safety", etc.

3. Green: Used to indicate safety. Such as "work here", "grounded", etc.

4. Blue: used to mark enforcement, such as "must wear a safety helmet", etc.

5. Black: geometric figures used to mark images, text symbols and warning signs.

According to regulations, in order to facilitate identification, prevent misoperation, and ensure the safety of operation and maintenance personnel, different colors are used to distinguish equipment features. For example, for electrical busbars, phase A is yellow, phase B is green, phase C is red, and the exposed ground wire is painted black.

In secondary systems, yellow is used for AC voltage loops, green for AC current loops, and white for signal and warning loops.

2. Precautions for safe use of electricity:

With the continuous improvement of living standards, more and more places in life use electricity. Therefore, it is necessary for us to master the following basic knowledge of safe use of electricity:

l. Understand the main power switch and learn to turn off the main power supply in an emergency.

2. Do not touch or test the inside of the power socket with your hands or conductive objects (such as wire, nails, pins and other metal products).

3. Do not touch electrical appliances with wet hands or wipe them with wet cloth.

4. Unplug the power plug after using the electrical appliance; do not pull the wire hard when plugging or unplugging the power plug to prevent the insulation layer of the wire from being damaged and causing electric shock; if the insulation of the wire peels off, replace it in time New wires or wrap them with insulating tape.

5. If you find someone getting electric shock, you should try to turn off the power in time; or use dry wooden sticks and other objects to separate the electric shock person from the live electrical appliances; do not use your hands to save the person directly; if younger students encounter In this case, you should call an adult for help and do not handle it yourself to prevent electric shock.

6. Do not disassemble or install power lines, sockets, plugs, etc. at will. Even simple things such as installing light bulbs must be turned off first and done under the guidance of parents.

3. Common sense about safe use of electricity at home

1. Avoid overloading the power cord at home. Worn and aging power cords should be replaced in time to avoid accidents.

2. The general insurance and household insurance for household power supply should be reasonably configured so that they can protect household appliances.

3. When connecting to temporary power supply, qualified power cords, power plugs, and sockets must be safe and reliable. Damaged ones cannot be used, and the power cord connector must be wrapped with tape.

4. When temporary power lines are close to high-voltage transmission lines, they should maintain a sufficient safe distance from the high-voltage transmission lines (0.7 meters for 10KV and below; 1 meter for 35KV; 1.5 meters for 110KV; 3 meters for 220KV; 500KV, 5 meters).

5. Private wiring from public lines is strictly prohibited.

6. The line connectors should ensure good contact and reliable connection.

7. During room decoration, the power cord hidden in the wall should be placed in a special flame-retardant sheath, and the cross-section of the power cord should meet the load requirements.

8. Wear insulating gloves when using power tools such as electric drills.

9. If a household appliance catches fire, you should cut off the power supply first and then put out the fire.

10. The wiring of household appliances must be ensured correctly. If you have any questions, you should consult a professional in time.

11. Household electricity should be equipped with qualified leakage protectors with over-voltage protection to ensure personal safety when using household appliances.

12. When household appliances are in use, their shells should be well grounded, and a public ground wire should be installed indoors.

13. Do not touch live household appliances with wet hands, and do not wipe household appliances in use with a wet cloth. The power supply must be turned off before repairing household appliances.

14. Household electric heating equipment and heating equipment must be kept away from gas tanks and gas pipes. When gas leakage is found, open windows for ventilation first. Do not turn off the power supply, and ask professionals to repair it in time.

15. Use electric irons, soldering irons and other electric heating devices. Must be kept away from flammable items. After use, the power supply should be cut off and the plug should be unplugged to prevent accidents.

6. Common sense about safe use of electricity

Common sense about safe use of electricity

1. Electrical circuits and electrical equipment must be well insulated, including lamp holders, sockets, switches, etc. The live parts must not be exposed to prevent electric shock.

2.

Do not connect wires randomly to prevent electric shock or fire.

3. Do not move charged objects while standing on wet ground or wipe live household appliances with a damp rag to prevent electric shock.

4.

The selection of fuses must be reasonable. Do not use copper wire, aluminum wire or iron wire instead to prevent fire.

5.

The household appliances used, such as refrigerators, freezers, washing machines, etc., should be equipped with grounded sockets according to the product usage requirements.

6.

When repairing or replacing the lamp holder, even if the switch is turned off, do not touch it directly with your hands to prevent electric shock.

7. If there is a fire in an electrical appliance, cut off the power first to rescue. Do not put it out directly with water to prevent electric shock.

8.

If you find someone getting an electric shock, you should first try to disconnect the power supply (if you get an electric shock at a high place, you should also take measures to prevent the electric shock victim from falling and being injured) and then provide first aid.

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7. I want I want a few short essays on electricity safety, 50 to 70 words

Essay 1: Safe use of electricity At night, I was about to start doing my homework, and my father came over to help me turn on the lamp.

As soon as Dad plugged in the power, he heard a "bang" sound. The wire connected to the base of the desk lamp exploded, and a cloud of sparks was emitted. I was shocked and quickly asked my dad what was going on. Why did the wire of the desk lamp explode? My father told me that computers, TVs, refrigerators, electric fans, etc. used at home all require energy to turn on, and this energy is transmitted by two wires.

One of these two wires is called the live wire and the other is called the neutral wire. Normally, these two wires are separated. If these two wires accidentally touch each other, they will short-circuit and explode.

The explosion just now was caused by the wire of the desk lamp being broken, and the two copper wires inside were connected together, causing a short circuit. A short circuit in a wire can cause an explosion, which is very dangerous.

Therefore, children must pay attention to safety when using electrical appliances at home. Children cannot unplug electrical cords by themselves, let alone touch live things with their hands.

My father also told me that water also conducts electricity. We cannot pour water on electrical appliances, which can easily short-circuit and explode. Composition 2: Safe use of electricity Electricity has many uses and is closely related to our lives. We should develop a good habit of using electricity safely.

When we use electricity at home, there are often many hidden safety hazards. For example: at night, after we go to the toilet, we often turn off the lights in a hurry and go out without drying our hands.

This can easily lead to electric shock. After receiving an electric shock, the power supply should be cut off immediately.

On Saturdays and Sundays, we often go out and fly kites. But you also need to know how to choose a good place to fly a kite.

Flying a kite near high-voltage lines will be very dangerous. It will not only damage the high-voltage lines and cause large-scale power outages, causing serious economic losses, but also cause electric shock and fire. So, before we have fun, we must remember to find an open place! At home, for the electrical appliances we usually use, such as rice cookers, electric woks, and induction cookers, in addition to turning off the switch after use, it is also very important to unplug the plug! If you do not do this, the appliance may be damaged due to being powered on for a long time, resulting in a fire.

Among the above three examples, I think everyone will know that no matter how small a thing is, if it is not done correctly, it will cause serious consequences, so we must use electricity safely! Composition 3: Students, do you know about safe use of electricity? Electric energy is an indispensable and important energy source for our residents' lives. If we do not pay attention to the safe and scientific use of electricity, it will bring inconvenience to our lives and even cause accidents or disasters. Therefore, the use of electricity must be scientific and safe.

At home we often see and must use some daily necessities, such as sockets. Refrigerator. Rice cooker. Induction cooker. Microwave oven. TV.

Computer. hair dryer.

Water dispenser. There are also small desk lamps for us to study and so on.

By the way, there is also an elevator, which also requires electricity for us to ride. My parents often teach me how to use electricity safely and save electricity at home, and I have also remembered some of them.

Let me tell you a few points below! (1) Do not use a damp rag to wipe live household appliances. Do not turn off the lights or pull out the plug when there is water on your hands. This can easily cause electric shock. (2) Do not pour water on electrical appliances.

This may cause a short circuit or explosion in the power supply.

If you accidentally spill water on a live electrical appliance, don't panic and unplug it immediately.

(3) Do not fill the socket with TV sets. Plugs for computers and other electrical appliances, which is a waste of electricity and may cause a fire hazard.

Before going to bed or when going out, it is best to unplug all unused sockets because this can save some electricity. This is what my mother taught me.

(4) When checking electrical appliances, the power supply must be disconnected first. (5) Be sure to close the door when you finish taking things out of the refrigerator.

This can protect the refrigerator and save electricity. Do not watch TV during thunderstorms and unplug the TV.

At school. I found a wire on the way to school.

Don’t get close to the cable and don’t pull it with your hands. Don't stand under trees or on top of mountains when you go out to play.

Because the teacher said it is towering. Protruding objects are susceptible to lightning strikes.

Safe use of electricity is not only the responsibility and obligation of each of us, but judging from the points I mentioned above, having some knowledge can also save a lot of electricity. Over time, we will save a lot of money for ourselves. The money saved can be used to ask my parents to buy me delicious food or some school supplies.

Kill three birds with one stone, why not? Composition 4: Safe use of electricity With the increasing development of science and technology, the use of electricity has become an extremely common thing. But do people know how to use electricity correctly? In winter, when the wind is biting, people will use heating appliances, but there are many hidden safety risks.

People will use electric blankets at night in winter. In order to keep them warm, they will turn them on to the maximum. If a baby wets the bed at night, the electric blanket will be stained with water. The current will be conducted to the baby along with the water, causing A tragic disaster. People also often use rechargeable handwarmers, but be careful: charging for too long can easily cause an explosion; people should not leave during the charging process, and do not squeeze hard during use; do not use them during the charging process.

The scorching summer is coming. In order to beat the heat, people will use refrigeration appliances. At this time, the electricity consumption will be much greater than in other seasons. The electricity consumption of almost every household increases greatly in summer. If you use other metals instead of fuses, it will be impossible to avoid the occurrence of fires. I once heard about one thing, which is because of electricity: One afternoon, a few friends were together. , very bored, looking for games to play.

I saw a small uninhabited house with all the sockets and everything. Outside, a brave boy said: "We might as well try touching the socket with an iron rod to feel the tiny current." , Numb, it’s so fun!” Several other people agreed, so they quickly found an iron rod. The suggested boy played it easily by himself. When the others saw that he was playing well and that nothing happened, they let go and were all eager to try.

But just as they were getting into playing, they heard bursts of thunder and saw streaks of lightning. Some of the timid ones said, "Stop playing! It's too dangerous. There's lightning outside." Lightning will cause electric shock! "What are you afraid of? If you don't dare to play, just go home!

8. Tips on electricity safety in daily life.

, Home circuit.

1. The main components of the home circuit are low-voltage power supply lines, voltmeters, knife switches, fuses, electrical appliances, sockets, and switches.

2. Connections. Method: All electrical appliances in the household circuit are connected in parallel to the circuit, and each electrical appliance is connected in series with an outlet. The switching on and off of one electrical appliance will not affect the normal operation of other electrical appliances. Each socket is connected in parallel to the circuit. . Whether there is any electrical appliance plugged in will not affect the normal use of other electrical appliances.

3. Distinguish the live wire, neutral wire and ground wire: the low-voltage power supply line is connected to the household circuit by two wires, one of which is connected to the household circuit. There is no voltage between the ground and the ground, which is called the neutral wire. There is 220V voltage between the other wire and the ground, which is called the live wire. There is 220V voltage between the live wire and the neutral wire. There is a wire in the three-hole socket that connects the household appliance shell to the earth. This wire is called the ground wire. Although the voltage between the ground wire or the live wire and the neutral wire is 220V, the ground wire and the neutral wire must not be connected, otherwise it will easily cause an electric shock accident. You can use a test pen to identify it. Live wire and neutral wire. Touch the metal body at the end of the pen with your hand, and the tip of the pen touches the wire (or the wire connected to the wire). If the neon tube glows, it means it is in contact with the live wire.

4. The electric energy meter is used to measure the amount of electric energy consumed by the user and is installed in front of the user's main switch. Use an electric energy meter to measure the power of electrical appliances. 5. The function of fuse: The fuse is used to protect the circuit. Household fuses are made of lead-antimony alloy with high resistivity and low melting point. When the current is too large, it will generate more heat, causing the temperature to reach the melting point and automatically fuse and cut off the circuit. Remember not to use other wires to replace the fuse. Selection of fuse: I amount is larger than I normally. The fusing current of a general fuse is about twice the rated current.

2. There are basically two reasons for excessive current in household circuits.

1. Short circuit occurs: A short circuit is when the current directly connects the neutral line and the live wire without passing through the electrical appliance. In order to avoid the short circuit phenomenon, it is necessary to check the line in time to see if there are any damaged wires or insulation layers, as well as the bonding of the wires. Touch or moisture, etc.

2. The total power of electrical appliances is too large: when the voltage U between the live wire and the neutral wire is constant, the main circuit current I=P/U. When more electrical appliances are connected in parallel, the total power P becomes larger, and the current I also becomes larger, which is the same as the result of a short circuit. When the current I reaches a certain level, the fuse will heat up and automatically cut off the circuit. If several high-power electrical appliances are connected to the home, remember to stagger their usage times.

3. Common sense of safe electricity use.

1. Causes of electric shock: The human body is a conductor with a resistance of about 1,000 ohms (just for people). When a person gets an electric shock, the current will flow into the earth through the human body. When the human body directly or indirectly encounters a live line, the person will An electric shock accident occurred. When the current flowing through the human body increases to 1 mA, people will feel "numb"; when the current exceeds 8~10 mA, it is difficult for the human hand to get rid of the charged body. The current passing through the human body reaches 100 mA, as long as it is very short Over time, breathing will become suffocating and the heart will stop. Therefore, the main cause of human electrocution death is large current passing through the human body. Practice has proven that it is safe only if the current is no higher than 30~40 mA and no higher than 36 volts.

2. Forms of electric shock:

(1) Single-line electric shock: A person standing on the ground touches a live wire or an object connected to the live wire.

(2) Double-wire electric shock: A person gets an electric shock when his hands touch the live wire and the ground wire respectively.

(3) High-voltage arc electric shock: When a person is close to a high-voltage line (or high-voltage charged object), air arc discharge is caused and electric shock occurs (lightning also occurs in this way).

(4) High-voltage step voltage and electric shock: When a person walks into a place where high-voltage power lines fall, the step voltage between the front and rear feet exceeds 36 volts and gets an electric shock.

3. Rules for safe use of electricity: Do not touch low-voltage charged objects (such as 220 volts), and do not approach high-voltage charged objects.

4. First aid for electric shock:

(1) Quickly cut off the power supply (open the main gate or main switch);

(2) Use dry wood Sticks or bamboo sticks can be used to open the power cord and quickly remove the person who was electrocuted from the power supply;

(3) When an electrical fire occurs, everyone must first cut off the power supply and then pour water to put out the fire;

( 4) Carry out artificial respiration and rescue