How much do you know about electrical safety？
2021-07-06
The operation of power cable is one of the important links in our daily life, work and production. The safety of cable line operation is related to the production of enterprises and the safety of people's lives and property. Therefore, the maintenance of cable is a crucial work. Next, Raines will analyze the relevant problems in the operation and maintenance of power cable.
1、 Understanding electric shock
1. What is electric shock
Electric shock refers to the current through the human body, light will feel numb or pain, serious will produce burns, convulsions, shock and even fatal situation.
2. Form of electric shock
How to get an electric shock? Electric shock can be divided into direct electric shock, indirect electric shock (high voltage) and other forms of electric shock (lightning, etc.). Among them, in our daily life, the most common one is direct electric shock.
If the lighting switch is installed on the zero line, the phase line of the lamp holder is still connected. Although the lamp is not on when it is turned off, people think that the lamp is not on and mistakenly think that it is in a power-off state. In fact, the voltage at each point of the lamp is still a dangerous voltage of 220 v. If someone touches these actual live parts when the light is off, 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 with live wire to ensure safety.
2. Correct installation of single phase three hole socket
General single-phase electrical equipment, especially mobile electrical equipment, should use three core plug and its supporting three hole socket. There is a special protective grounding jack on the three hole socket. Therefore, when wiring, the grounding Jack should be connected with the special protective grounding wire. When using zero line protection, the zero line should be led out from the power side, and the zero line leading into the socket should not be used nearby.
3. It is strictly forbidden to bury the plastic insulated conductor directly in the wall
After long-term use of plastic insulated wire, the plastic will age and crack, and the insulation level will be greatly reduced. When the line is overloaded or short circuited, it is easier to accelerate the insulation damage. Once the wall is wet, it will cause a large area of electric leakage and endanger personal safety. Therefore, we must use wires with guaranteed quality. If we want to improve safety, we can also use Zhujiang cable's low smoke halogen-free flame retardant cable. The main characteristics of this kind of cable are durable and nonflammable. In addition to short circuit leakage, it also greatly reduces the possibility of fire.
3、 How to avoid electric shock
1. Noncontact conductor
No direct contact with the conductor is the safest way to prevent electric shock. If you only touch the insulator in the circuit and absolutely do not touch the conductor, you will not get electric shock.
2. Power off maintenance
All forms of electric shock are based on the premise that there is electricity in the circuit, but no matter how insulation tools are used, they are not as thorough as power-off maintenance. For example, when repairing electric lights, many people only turn off the light switch, but in fact, only when the circuit breaker in the distribution box is turned off can the power be cut off.
3. Installation of protective equipment
Home common protection equipment is leakage protector, home voltage is low, generally 220 V, most electric shock situation will not instantly fatal, which gives the leakage protector start time, socket circuit must install leakage protector.
4. Right hand electric shock
From circuit maintenance to plug-in and plug-in, the right hand should be used for anything with the possibility of electric shock; Because when a single-phase electric shock occurs, the left hand and feet form a loop after the left hand is electrocuted, and the current will directly pass through the heart, causing fatal injury.
Check electrical equipment and circuit regularly
1、 Understanding electric shock
1. What is electric shock
Electric shock refers to the current through the human body, light will feel numb or pain, serious will produce burns, convulsions, shock and even fatal situation.
2. Form of electric shock
How to get an electric shock? Electric shock can be divided into direct electric shock, indirect electric shock (high voltage) and other forms of electric shock (lightning, etc.). Among them, in our daily life, the most common one is direct electric shock.
2、 Electricity safety tips
If the lighting switch is installed on the zero line, the phase line of the lamp holder is still connected. Although the lamp is not on when it is turned off, people think that the lamp is not on and mistakenly think that it is in a power-off state. In fact, the voltage at each point of the lamp is still a dangerous voltage of 220 v. If someone touches these actual live parts when the light is off, 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 with live wire to ensure safety.
2. Correct installation of single phase three hole socket
General single-phase electrical equipment, especially mobile electrical equipment, should use three core plug and its supporting three hole socket. There is a special protective grounding jack on the three hole socket. Therefore, when wiring, the grounding Jack should be connected with the special protective grounding wire. When using zero line protection, the zero line should be led out from the power side, and the zero line leading into the socket should not be used nearby.
3. It is strictly forbidden to bury the plastic insulated conductor directly in the wall
After long-term use of plastic insulated wire, the plastic will age and crack, and the insulation level will be greatly reduced. When the line is overloaded or short circuited, it is easier to accelerate the insulation damage. Once the wall is wet, it will cause a large area of electric leakage and endanger personal safety. Therefore, we must use wires with guaranteed quality. If we want to improve safety, we can also use Zhujiang cable's low smoke halogen-free flame retardant cable. The main characteristics of this kind of cable are durable and nonflammable. In addition to short circuit leakage, it also greatly reduces the possibility of fire.
3、 How to avoid electric shock
1. Noncontact conductor
No direct contact with the conductor is the safest way to prevent electric shock. If you only touch the insulator in the circuit and absolutely do not touch the conductor, you will not get electric shock.
2. Power off maintenance
All forms of electric shock are based on the premise that there is electricity in the circuit, but no matter how insulation tools are used, they are not as thorough as power-off maintenance. For example, when repairing electric lights, many people only turn off the light switch, but in fact, only when the circuit breaker in the distribution box is turned off can the power be cut off.
3. Installation of protective equipment
Home common protection equipment is leakage protector, home voltage is low, generally 220 V, most electric shock situation will not instantly fatal, which gives the leakage protector start time, socket circuit must install leakage protector.
4. Right hand electric shock
From circuit maintenance to plug-in and plug-in, the right hand should be used for anything with the possibility of electric shock; Because when a single-phase electric shock occurs, the left hand and feet form a loop after the left hand is electrocuted, and the current will directly pass through the heart, causing fatal injury.
Check electrical equipment and circuit regularly
We can't predict the occurrence of electric shock, so the best way to avoid electric shock is to prevent it. In daily life, we can regularly check the situation of electrical appliances and circuits, electrical problems should be repaired and replaced in time, so as to achieve the real safe use of electricity, which is responsible for themselves and their families.
Source: Zhujiang cable