2. Reduce material loss and save maintenance cost.
3. Reduce electric shock accidents and ensure the personal safety of power users.
Safe electricity use method:
It's unbearable hot in summer, and the air conditioning fans are all on. Fire and electric shock accidents caused by the use of these electrical appliances occur every year. How to make science of electricity safe is an important matter that every family must pay attention to.
First of all, the bearing capacity of watt-hour meter and low-voltage line should be considered. The electric power that the watt-hour meter can withstand is similar to the value of voltage multiplied by current, and the voltage of domestic electricity is 220 volts.
If a 2.5-amp watt-hour meter is installed at home, it can withstand 550 watts, but a 600-watt rice cooker cannot be used. In this way, the electric power that a 5-amp watt-hour meter can bear is 1 100 watt.
Secondly, it should be considered that a socket allows several appliances to be plugged in. If the sum of the maximum power of all electrical appliances does not exceed the power of the socket, there is generally no problem.
When using sockets with more than three pairs of jacks and using high-power appliances such as air conditioners, electric cookers, rice cookers and electric water heaters at the same time, the sum of the powers of these appliances should be calculated first.
If the limited power of the socket is exceeded, the socket will burn out due to excessive current. At this time, the number of electrical appliances used at the same time should be reduced to keep the total power within the allowable range of the socket.
In addition, the installed circuit breakers must use corresponding standard fuses (air switches are widely used and fuses have basically been eliminated). Do not use other metal wires instead, otherwise it will easily cause fire and damage electrical appliances. If the fire is caused by the fire of household appliances, you must cut off the power supply first and then put out the fire to avoid electric shock and personal injury.
When the voltage fluctuates greatly, use a protector. In daily life, there is often an instantaneous power failure or power supply voltage fluctuation, which is a threat to the refrigerator.
If the power supply is restored within a short time (3 ~ 5 minutes) after the power failure, the starting current of the refrigerator compressor is several times larger than the normal starting current, which may burn out the compressor.
Extended data:
First, the common sense of safe electricity use
1, the household power cord should not be overloaded, and the worn and aging power cord should be replaced in time to avoid accidents.
2. The total risk and home risk of household power supply should be reasonably configured to protect household appliances.
3, temporary power supply to use qualified power cord, power plug and socket to be safe and reliable. Damaged ones cannot be used, and the power cord connector should be wrapped with tape.
4. When the temporary power cord is close to the high-voltage transmission line, it should keep a sufficient safe distance from the high-voltage transmission line (10KV and below 0.7m; 35kV， 1m； 1 10kV， 1.5m； 220kv，3m； 500 kV, 5 meters).
5, it is forbidden to wiring from public lines.
6, line connector should ensure good contact and reliable connection.
7, room decoration, hidden in the wall of the power cord should be placed in a special flame retardant sheath, the power cord section should meet the load requirements.
8. Use electric tools such as electric drills. Insulating gloves must be worn.
9, in case of household appliances on fire, should first cut off the power supply, and then put out the fire.
10, the wiring of household appliances must be correct. Ask professionals if you have any questions.
1 1, household appliances should be equipped with qualified leakage protectors with overvoltage protection function to ensure personal safety when using household appliances.
12. When household appliances are used, they should have good shell grounding, and public grounding wires should be installed indoors.
13, wet hands can't touch live household appliances, can't use wet cloth to wipe household appliances in use, and power supply must be stopped before household appliances are repaired.
14, household electric heating equipment, heating equipment must be far away from gas tanks and gas pipelines. When the gas leaks, first open the window for ventilation, never turn on the power supply, and ask professionals to repair it in time.
15, using electric irons, soldering irons and other electric heating devices. Must stay away from flammable materials, cut off the power supply and unplug the bolt after use to prevent accidents.
Second, the principle of electricity consumption
1, not close to high-voltage charged bodies (outdoor high-voltage lines, beside transformers) and not touching low-voltage charged bodies.
2. Insert or unplug the plug without wet manual switch.
3, installation and maintenance of electrical appliances should wear insulating shoes, standing on the insulator, and cut off the power supply.
4, it is forbidden to use copper wire instead of fuse, it is forbidden to use rubber rubber instead of electrical insulation tape.
5, install electric shock protector in the circuit, and regularly check its sensitivity.
6. In thunderstorm weather, don't use the radio, video recorder and TV set, unplug the power plug and antenna plug of the TV set. Don't use the phone for the time being If you must use it, you can use the hands-free function.
7. It is forbidden to connect wires privately, and students are forbidden to use electric stoves, "quick heating" and other electrical appliances in the dormitory.
8. Don't fly kites and play ball under cables and wires.
References:
Baidu encyclopedia-safe use of electricity