1. Why must the lighting switch be connected to the live wire?

Guizhou Yike electric power reminds you that if you install the lighting switch on the zero line, although the light is not on when it is disconnected, the phase line of the lamp head is still connected. If people think that the light is not on, they will mistakenly think that it is in the power-off state. In fact, the voltage to the ground of each point on the lamp is still a dangerous voltage of 220 v. If people touch these parts which are actually electrified when the lamp is off, it will cause electric shock accident. Therefore, all kinds of lighting switches or switches of single-phase small capacity electrical equipment must be connected in series on the fire line to ensure safety.

2. How to install single phase three hole socket correctly? Why?

Generally, single-phase electrical equipment, especially mobile electrical equipment, should use three core plug and its matching three hole socket. There is a special protective zero (ground) Jack on the three hole socket. When using the zero connection protection, some people often connect the connection pile head of this hole with the zero line leading into the socket directly in the socket bottom, which is extremely dangerous. Because if the zero line of the power supply is disconnected, or the fire (phase) line and zero line of the power supply are reversed, the metal parts such as the shell will also carry the same voltage as the power supply, which will lead to electric shock.

Therefore, the special grounding Jack should be connected with the special protective grounding wire. When using the zero line protection, the neutral line should be introduced from the power supply terminal, instead of the nearest zero line leading into the socket.

3. Why is it strictly forbidden to bury plastic insulated wire in the wall?

(1) After long-term use of plastic insulated wire, the plastic will be aged and cracked, and the insulation level will be greatly reduced. When the line is overloaded or short-circuit for a short time, the insulation damage will be accelerated.

(2) Once the wall is damp, it will cause a large area of electric leakage, endangering personal safety.

(3) The plastic insulated wire is directly buried, which is not conducive to the maintenance and repair of the line.

4. Why use leakage protector

Leakage protector, also known as leakage protection switch, is a new type of electrical safety device

(1) Prevent electric shock accidents caused by electric equipment and electric circuit leakage.

(2) Prevent single-phase electric shock accident in the process of using electricity.

(3) Cut off the single-phase grounding fault in the operation of electrical equipment in time to prevent electrical fire caused by leakage.

(4) With the improvement of people's living standards and the continuous increase of household appliances, in the process of using electricity, personal electric shock and fire accidents caused by the defects of electrical equipment itself, improper use and adverse safety technical measures have brought undue loss to people's lives and property. The appearance of leakage protector can prevent all kinds of accidents and cut off the power supply in time It provides reliable and effective technical means to protect equipment and personal safety.

5. What are the main causes of electric shock?

Statistical data show that the main causes of electric shock accidents are as follows:

(1) Lack of electrical safety knowledge, flying kites near high-voltage lines, climbing high-voltage poles and pulling out bird's nest; picking up the fire wire by hand without power failure after the low-voltage overhead line is broken; touching the electrified body by hand in the dark; touching the damaged rubber covered knife switch with hands.

(2) In violation of operation regulations, live line or electrical equipment is connected without taking necessary safety measures; damaged equipment or wire is touched; live equipment is mistakenly boarded; live lighting is connected; electric tools are repaired on line; electrical equipment is moved on line; bulb is twisted by wet hand.

(3) The equipment is unqualified and the safety distance is not enough; the grounding resistance of two wire one grounding system is too large; the grounding wire is unqualified or the grounding wire is disconnected; the insulation is damaged and the wire is exposed.

(4) The equipment was in disrepair, the line was broken by strong wind or the pole was not repaired in time; the rubber wood damage of the rubber cover knife brake was not changed in time; the motor wire was damaged, which made the shell live for a long time; the porcelain bottle was damaged, so that the phase line and the stay wire were short circuited, and the equipment shell was charged.

(5) Other accidental reasons, when walking at night, touch and break the live wire falling on the ground.

6. What rescue measures should be taken in case of electric shock?

In case of electric shock accident, while ensuring the safety of rescuers, we must first try to make the person get rid of the power supply quickly, and then carry out the following repair work.

(1) Unfasten tight clothing that prevents the person from breathing.

(2) Check the mouth of the person with electric shock, clean the mucus in the mouth, and remove the denture if any.

(3) Rescue immediately on the spot. If breathing stops, mouth-to-mouth artificial respiration should be used. If the heart stops beating or irregular fibrillation, artificial chest compression method can be used. Never interrupt for no reason.

If there is a second person on the scene besides the rescuer, the following work should be carried out immediately:

(1) Provide first aid tools and equipment.

(2) Advise the staff to leave the site.

(3) Maintain adequate lighting and ventilation on site.

(4) Report to the leader and ask the doctor to come to rescue.

Guizhou Yike electric power shared the experimental research and statistics that 90% of the patients could be saved if the treatment was started 1 minute after the electric shock; only 10% of the patients could be saved if the rescue started 6 minutes after the electric shock; and the possibility of survival was very small if the rescue started 12 minutes after the electric shock. Therefore, when someone is found to be electrocuted, every possible means should be taken.