Do you understand these weak common sense?
Fan Assy,Cooling Fan Assy System,Radiator Fan Assy,Radiator Fan Motor System Chengdu Huachuan Electric Parts Co., Ltd. , https://www.chcd-global.com
February 05 14:10:28, 2020
Why should the lighting switch be connected to the fire line? How to install a single-phase three-hole socket? why? Why use a leakage protector? What ambulance measures should be taken in the event of an electric shock? What are the measures for household safety? How to prevent burning of household appliances? How to choose the fuse for households? Do you understand these weak common sense? If you don't understand, you can follow the small series to understand:
1. Why should the lighting switch be connected to the fire line?
If the lighting switch is installed on the zero line, although the light is not turned off when the light is off, the phase line of the light head is still turned on, and people think that the light is not bright, it is mistakenly considered to be in a power-off state. In fact, the ground voltage at each point on the luminaire is still a dangerous voltage of 220 volts. If people touch these actually charged parts when the light is off, it will cause an electric shock. Therefore, the switches of various lighting switches or single-phase small-capacity electrical equipment can only be secured if they are connected in series on the fire line.
2. How to install a single-phase three-hole socket? why?
Generally, single-phase electrical equipment, especially mobile electrical equipment, should use a three-pin plug and a three-hole socket. There is a special protective zero (ground) jack on the three-hole socket. When using zero-connection protection, it is often only directly connected to the hole terminal in the socket bottom and the zero wire that is introduced into the socket. Extremely dangerous. Because if the neutral line of the power supply is disconnected, or the fire (phase) line and the neutral line of the power supply are reversed, the metal part such as the outer casing will also carry the same voltage as the power supply, which will result in electric shock.
Therefore, the dedicated grounding jack for wiring should be connected to a dedicated protective grounding wire. When using zero-connection protection, the zero line should be specifically drawn from the power supply terminal, and should not be used near the neutral line of the socket.
3. Why use a leakage protector?
Leakage protector, also known as leakage protection switch, is a new type of electrical safety device whose main uses are:
(1) Prevent electric shock accidents caused by electric equipment and electrical line leakage.
(2) Prevent single-phase electric shock accidents during power consumption.
(3) Cut off the single-phase ground 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, due to defects in electrical equipment, improper use and unfavorable safety technical measures, personal electric shock and fire accidents give life to the people. And the property has brought undue losses, and the appearance of leakage protectors provides reliable and effective technical means for preventing the occurrence of various accidents, cutting off the power supply in time, protecting equipment and personal safety.
4. What ambulance measures should be taken when an electric shock occurs?
In the event of an electric shock, while ensuring the safety of the rescuer, you must first try to get the electric shocker out of the power supply quickly, and then carry out the following repair work.
(1) Untie the tight clothes that hinder the breathing of the electric shock.
(2) Check the mouth of the electric shocker and clean the mucus in the mouth. If there is a denture, remove it.
(3) Immediately carry out the rescue on the spot, such as breathing stop, using mouth-to-mouth artificial respiration to rescue, if the heart stops beating or irregular vibration, artificial chest extrusion method can be used to rescue. It must not be interrupted without cause.
If there is a second person present in addition to the rescuer on site, you should immediately do the following:
(1) Provide tools and equipment for first aid.
(2) Dismiss the on-site staff.
(3) Keep enough lighting on the site and keep the air flowing.
(4) Report to the leader and ask the doctor to come to the rescue.
Experimental studies and statistics show that if treatment is started 1 minute after the electric shock, 90% can be saved; if rescue is started 6 minutes after the electric shock, only 10% of the rescue opportunities will be available; and 12 minutes after the electric shock, the rescue will be started. The possibility of saving is extremely small. Therefore, when someone is found to have an electric shock, they should race against time and adopt all possible methods.
5. What are the measures for household safety?
With the popularization and application of household appliances, it is of vital importance to correctly grasp the knowledge of safe electricity use and ensure the safety of electricity use.
(1) Do not buy "three no" fake household products.
(2) When using home appliances, there should be a complete and reliable power cord plug. Grounding protection is required for household appliances in metal enclosures.
(3) Switches and fuses cannot be installed on the ground and neutral lines. Do not connect the ground wire to the tap water or gas pipe.
(4) Do not touch live equipment with wet hands. Do not wipe the live equipment with a damp cloth.
(5) Do not pull the wires randomly, do not move the live equipment.
(6) When inspecting and repairing household appliances, the power must be disconnected first.
(7) When the power cord of the household appliance is damaged, replace it immediately or wrap it with insulating cloth.
(8) When a household appliance or electric wire is involved in a fire, the power should be disconnected before the fire is extinguished.
6. How to prevent burning of household appliances?
The commonly used household appliances are rated at 220 volts and the normal supply voltage is around 220 volts. When the power supply line is instantaneously increased due to natural disasters such as lightning strikes, the three-phase load unbalanced household line is in disrepair, the voltage is increased due to the phase voltage rise caused by human error wiring, etc. This will increase the current and cause the household appliance to burn out due to overheating. To prevent burning of household appliances, we must start from the following aspects: First, the electrical equipment should be disconnected from the power supply when not in use; second, the old and damaged repair line should be modified; third, the over-voltage protection leakage switch should be installed.
7. How to choose the fuse for households?
The fuses used by households should be selected according to the size of the electricity used. If using a meter with a capacity of 5 amps, the fuse should be greater than 6 amps and less than 10 amps; if using a meter with a capacity of 10 amps, the fuse should be greater than 12 amps and less than 20 amps, that is, the fuse should be 1.2~ of the meter capacity. 2 times. The fuses to be used should be one that meets the requirements, and cannot be used in combination with a small-capacity fuse.