How to Prevent Electric Shock, How to Prevent Electric Shock10 Ways

The insulator material is protected against electric shock. 1. Solids: such as plastic, rubber, glass, ceramics, etc.

2. Liquid: all kinds of natural mineral oil, edible oil, alcohol, silicone oil, trichlorobiphenyl, etc.

3. Gas: such as air, carbon dioxide, sulfur hexaoxide, etc.

Common technical measures to prevent electric shock are: insulation, screen protection, spacing, grounding, zeroing, installation of leakage protection devices and the use of safety voltage. On the premise of improving technical measures, it is necessary to strictly abide by the safety operation procedures, so as to avoid the occurrence of electric shock accidents to the greatest extent.

1.Conscientiously study the knowledge of safe electricity use and improve your ability to prevent electric shock. Pay attention to the electrical safety distance and do not enter the premises that have been marked with electrical hazard signs. Do not move or touch electrical equipment, especially when the human body is sweating or the hands and feet are wet, do not operate electrical equipment.

2.In the event of a malfunction of electrical equipment, do not disassemble it by yourself, and ask an electrician with an electrician operation certificate to repair it. When there is a fault in the public electrical equipment or high-voltage line, call the police** and ask the power department to deal with it.

3.Construction according to the design specifications and operation specifications to ensure the installation quality. Do not use low-quality, worn-out and damaged wires and electrical equipment.

4.Electrical equipment must have protective zero and protective grounding devices. And check it frequently to make sure it's safe and secure.

5.Configure equipment and wires according to the safe ampacity of the line, do not arbitrarily increase the load, and prevent short circuit and leakage caused by overcurrent heating. When replacing the line fuse, do not arbitrarily increase the specification, and do not replace it with other metal wires.

6.When repairing electrical equipment and moving electrical equipment, the power should be completely cut off, and the safety sign "No closing, someone working" should be hung in a conspicuous position. Equipment and lines that have not experienced electricity are considered to have electricity.

Equipment with capacitors should be discharged first, and movable equipment should be prevented from pulling off wires.

7.The distribution box, switchboard, switchboard, buttons, sockets, wires, etc. that are often in contact during use should be intact. If the insulation is aging or damaged, it should be replaced in time.

8.The working lights of machine tools and portable temporary lights should use a safe voltage of no more than 36 volts.

9.Stay away from high-voltage poles, towers and lightning rods during thunderstorms. The lightning rod should be intact and regularly inspected.

10.In all constructions, the protection distance of the high-voltage line should be avoided. On April 8, 2004, more than 20 people from a company in Jieyangshi, Guangdong Province, were carrying an iron frame when they touched a 10,000-volt high-voltage power line in the air, resulting in the death of 12 people. The lessons of such blood must be kept in mind.

11.When the high-voltage line lands, it should be at least 20 meters away from the grounding point, and if it is within 20 meters, it should be jumped away from 20 meters with one foot or one foot to prevent electric shock from the stepping voltage.

12.In the event of an electrical fire, the power supply should be cut off immediately, and the fire should be extinguished with yellow sand and carbon dioxide fire extinguishers, and the fire should not be extinguished with water or foam fire extinguishers.

What are the measures to prevent electric shock? Star Awareness Project

1. Before using electrical equipment, the equipment should be inspected or observed, and the power supply can be turned on when the equipment is in good condition.

2. Do not turn on or off the power switch without purpose or at will, and do not turn on the power supply in the state of unclear circuit or equipment.

3. Before operating electrical equipment, it is necessary to keep the operating part of the equipment dry and clean, otherwise it is very easy to be dangerous.

4. If the mobile electrical appliances need to be moved in use, the safety of the line and the safety of the equipment must be ensured, so as to prevent the line from being long enough or the movable line from pulling, knotting and twisting that affect the safety.

5. The equipment should be effectively and well protected during use, and the heat that may be generated during the operation of the equipment should be effectively ventilated and dissipated.

6. When necessary, safety protective equipment should be used when operating, inspecting and overhauling the equipment, and it should be noted that it should never be operated in violation of regulations.

7. Even professional electrical staff should not operate in the case of unclear lines and equipment.

8. Safe and effective electric shock protection control equipment or devices that meet the requirements should be installed on the line as needed.

9. Single-phase electric shock: while a certain part of the human body contacts the charged body, the other part is connected with the earth or neutral wire, and the current flows from the charged body through the human body to the earth (or neutral wire) to form a loop.

10. Two-phase electric shock: electric shock caused by different parts of the human body when they contact the two-phase power supply at the same time, for this situation, regardless of whether the neutral point of the power grid is grounded, the line voltage borne by the human body will be higher than that of single-phase electric shock, and the danger is greater.

1. Understand the common sense of electricity use, and regularly overhaul the electrical appliances and lines used;

2. Avoid touching electrical shells, wires, plugs, etc. with wet hands or cloths;

3. In thunderstorms, outdoor workers should not stand on high places, walk around in fields or take shelter from rain under trees, and do not touch antennas, water pipes or metal devices.

Use special tools to confirm whether the equipment is live, electric detector, etc.

Wear insulated gloves.

Wear insulated shoes. Check the device number and name, and do not follow the wrong interval.

Operate on an insulating mat.

Abide by the "five defenses" rule.

Use insulating tools whenever possible.

Do not touch live equipment with wet hands.

Electrical products should be reliably grounded.

Use a leakage protector.

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<> main measures to prevent electric shock:

1. Protective grounding: Protective grounding is to prevent the human body from suffering the danger of electric shock when the insulation of electrical equipment is damaged, and the good connection between the metal shell or frame of the electrical equipment and the grounding body. Protective grounding is suitable for use in low power grids where the neutral point is not grounded.

The use of protective grounding can only reduce the risk of electric shock, but it cannot completely guarantee personal safety.

2. Protection zero: In order to prevent people from being electrocuted due to damage to the insulation of electrical equipment, the metal shell of the electrical equipment is connected with the zero line of the power grid, which is called protection zero. The protection zero connection is suitable for low-voltage power systems where the neutral point of the three-phase four-wire system is directly grounded.

After the implementation of protection zero, if the electrical equipment has a live part of the equipment to hit the shell or leakage, it constitutes a single-phase short circuit, and the short-circuit current is very large, so that the power supply of the shell phase is automatically cut off (the fuse fuse is blown or the automatic air switch trips), and when the person touches the equipment shell, there will be no electric shock.

3. Working grounding: A certain point in the power system is directly or connected to the ground by special equipment, which is called working grounding. Working grounding mainly refers to the neutral point or neutral wire grounding of the transformer. The n wire must be insulated with copper core.

In the power distribution, there are auxiliary equipotential terminals, which are generally in the cabinet. It must be noted that the terminal block must not be exposed; It cannot be mixed with other grounding systems, such as DC grounding, shielding grounding, anti-static grounding, etc.; It cannot be connected with PE wire.

Sogou asked. 4. Installation of leakage protector: the main use of current action type leakage protector, under normal circumstances, the phasor sum of the three-phase current of the main circuit is equal to zero, so the secondary coil of the zero-sequence current transformer has no voltage output.

However, when there is leakage or electric shock, the phasor sum of the three-phase current of the main circuit is not equal to zero At this time, the transformer has a voltage output, which is amplified by F and added to the action coil of the tripping device, and the tripping device acts, disconnects the main switch, and cuts off the faulty circuit. After the test, the button QA is pressed and tested, and the whole process is generally included, so it can effectively play a protective role. The principle of action of the leakage protector.

5. Insulated safety equipment: the metal shell of the insulated safety equipment is used to make people and the ground, or to make people and tools, including the connected metal conductors, isolated. This is a simple and feasible security measure at the moment. Commonly used for insulation safety has insulated gloves and insulated boots.

What are the measures to prevent electric shock? Star Awareness Project