To use a three-pin plug, the three-pin plug has a ground wire in addition to the neutral wire and the live wire. This is a separate metal head. Everyone knows that we have a zero potential in the earth, that is, the earth is a good conductor of electricity. Equivalent to the wire, and in some electrical appliances with a metal shell, the metal shell is easy to have leakage, with a three-pin plug can let the leakage flow away from the ground! This principle is similar to the principle of lightning rods. So it will be safer.
The following gives a point of information: male plug three-pin plug, including ground, fire, zero three metal female socket, located in the three plug holes 3 plug body made of insulating material, from the back of the socket hole The leads are led out, and the cross-section of the plug body is an embossed stepped structure. The socket holes 3 are arranged as an upper part and one lower part is left and right. A flange 1 is formed on the rear end of the plug body and made of ceramic. Compared with the prior art, the convex step structure adopted by the utility model facilitates the heat dissipation of the socket and prolongs the service life. The flange of the socket can be easily inserted and removed. The socket is made of ceramic material, which is heat-resistant, leak-proof and protects the user's safety.
Home safety knowledge
(1) Every family must have some necessary electrical appliances such as electroscopes, screwdrivers, and glue clamps, as well as various types of fuses and fuses that are suitable for the use of household appliances.
(2) Each household meter must be equipped with general insurance before it. The meter should be equipped with a total knife gate and leakage protection switch.
(3) In any case, it is forbidden to use copper or iron wires instead of fuses. The size of the fuse must match the capacity used. When replacing the fuse, remove the porcelain cover and replace it. Do not lap the fuse directly in the porcelain case. Do not replace the fuse in the live condition (without opening the knife).
(4) After the fuse or leakage switch is blown, the cause must be ascertained before switching on the switching power supply. Under no circumstances shall the conductors be short-circuited or pressed against the leakage switch tripping mechanism for forced transmission.
(5) When purchasing home appliances, you should carefully check whether the technical parameters (such as frequency, voltage, etc.) of the product specification are in line with local electricity requirements. It is necessary to know how much power is consumed and whether the existing power supply capability of the family satisfies the requirements, in particular whether the wiring capacity, plugs, sockets, fuses, and meters meet the requirements.
(6) When the household power distribution equipment cannot meet the capacity requirements of the household appliances, it should be replaced and modified. It is forbidden to make use of it. Otherwise, overloaded operation can damage electrical equipment and may cause electrical fire.
(7) It is also necessary to understand the insulation performance of household appliances: whether it is general insulation, reinforced insulation or double insulation. If it is grounded for leakage protection, the grounding line is essential. Even for reinforced or double-insulated electrical equipment, it is beneficial to provide protective grounding or zero protection.
(8) Household appliances with electric motors (such as electric fans, etc.) should also be aware of the heat-resistant level and whether they should be operated continuously for a long time. Pay attention to the heat dissipation conditions of household appliances.
(9) Before installing household appliances, check the requirements of the product specification for the installation environment. Pay particular attention to the possibility of not installing the household appliances in a hot, dusty or flammable, explosive, corrosive gas environment under possible conditions. .
(10) When laying indoor wiring, the connection lines and neutral lines shall be clearly marked and consistent with the wiring of household appliances.
(11) If the household appliance is connected to a power source, a switch or plug connector that can be switched off must be used. It is forbidden to insert the wire directly into the socket hole.
(12) For household appliances that require protective earthing or zero-crossing protection, three-pin plugs and three-eye sockets shall be used. Do not use two-pin plugs and double-eye sockets instead, resulting in grounding (or zeroing) of the line.
(13) It is best not to have a connector in the middle of the home appliance wiring. When there must be a connector, it should be in firm contact and wrapped with insulating tape, or a porcelain junction box. Standard medical tape instead of electrical tape dressing joints.
(14) The connection between the wire and switch, knife gate, fuse box, lamp cap, etc. shall be firm and reliable, and the contact is good. The soft plastic copper wire connector shall be twisted and then placed under the joint screw gasket to prevent the thin strands from being scattered and causing a short circuit on the other joint.
(15) Home wiring shall not be laid directly on the flammable building materials. For the wiring on wood, porcelain beads or porcelain clips must be used; through the wood, porcelain casing must be used. Do not use flammable plastics and other flammable materials as decorative materials.
(16), grounding or connecting the zero line is not charged when normal, but leakage in case of leakage will cause energized electrical enclosure shell; in the event of a short circuit, the grounding line also passes a large current. For its safety, the grounding (connected to zero) wire shall not be less than the phase conductor, and no switches or fuses may be installed on it, nor may there be joints.
(17) The grounding wire should not be connected to the water pipe (because the plugging of the tap water pipe is used for insulation, and there is no grounding effect); it must not be connected to the gas pipe (to prevent the gas explosion caused by spark); On the ground of the telephone line (in order to prevent strong electricity); also must not be connected to the lead line of the lightning conductor (to prevent counterattack when lightning).
(18) All switches, switches and fuse boxes must have a cover. Aging and incomplete parts of the bakelite cover must be replaced. Dirty and damp persons must be wiped clean after use.
(19) Do not drag and drop the power cord on the ground to prevent the power cord from coming off and prevent damage to the insulation.
(20), before the trial of household appliances should be compared with the instructions, all switches, buttons are placed in the original stop position, and then follow the instructions to open and stop the operation sequence. If there are moving parts such as a moving head fan, consider sufficient space for movement in advance.
(21) If an abnormal condition such as spark, smoke, or burnt smell is found after the household electrical appliance is energized, it shall immediately stop and cut off the power supply for inspection.
(22) When moving home appliances, be sure to cut off the power supply to prevent electric shock.
(23) Heat-emitting appliances must be kept away from flammable materials. Electric stoves, heating appliances such as heaters, irons, etc. must not be placed directly on the boards to avoid fire.
(24) Do not touch live switches with wet hands; do not pull or plug the power plug with wet hands; do not touch the metal part of the contacts when pulling or plugging in the power plug; or replace the electrical components or bulbs with wet hands.
(25) For household appliances (such as hair dryers, electric irons, etc.) that are frequently used by hands, do not use wires wrapped around your hands.
(26) For household appliances that are in contact with the human body, such as electric blankets, electric oil caps, and electric heating shoes, electric test should be conducted before use. It is only after contact with the human body that there is no leakage of electricity.
(27) It is forbidden to move the household appliances by dragging the wires; it is forbidden to use the method of dragging the wires to pull the plug.
(28) When using household electrical appliances, first insert the unpowered side socket, and finally close the knife or plug in the live side socket; on the contrary, if you disable the home appliance, first open the charged side knife or pull out the charged side. Socket, and then unplug the uncharged side of the outlet (if you need to pull out).
(29) In the event of an emergency requiring the power cable to be cut off, an insulated electrician's pliers or a knife with an insulated handle must be used.
(30) When rescuing a person with electric shock, first disconnect the power supply or use a wooden board or insulation rod to pick up the power cord. Do not pull the electric shocker directly by hand to avoid electric shock.
(31) In addition to household appliances such as refrigerators, household appliances should be turned off, especially electric heating appliances, to prevent long-term heating caused by fire.
(32) It is forbidden to use the bed switch. In addition to electric blankets, do not lead charged electrical equipment to the bed and stay close to the sleeping body. Even if the electric blanket is used, if it is not necessary to keep it warm for the whole night, it is recommended to use it after heating to ensure safety.
(33) Household appliances should be burned, smoked, and caught on fire. They must be disconnected immediately and must not be sprayed with water or a foam fire extinguisher.
(34) Conduct regular insulation inspections on indoor wiring and electrical equipment and find that the damage is timely wrapped with electrical tape.
(35) Household appliances that are not used again before the rainy season or for a long period of time shall have a insulation resistance of not less than 1 MΩ measured with a 500V megger so that the insulation can be considered good. If there is no shaking, at least the electroscope is also used to check whether there is leakage.
(36) For household appliances that are frequently used, they should be kept dry and clean. Do not wipe the surfaces of household appliances with corrosive or conductive liquids such as gasoline, alcohol, soapy water, and decontamination powder.
(37) Professionals or repairs are required after damage to household appliances
The following gives a point of information: male plug three-pin plug, including ground, fire, zero three metal female socket, located in the three plug holes 3 plug body made of insulating material, from the back of the socket hole The leads are led out, and the cross-section of the plug body is an embossed stepped structure. The socket holes 3 are arranged as an upper part and one lower part is left and right. A flange 1 is formed on the rear end of the plug body and made of ceramic. Compared with the prior art, the convex step structure adopted by the utility model facilitates the heat dissipation of the socket and prolongs the service life. The flange of the socket can be easily inserted and removed. The socket is made of ceramic material, which is heat-resistant, leak-proof and protects the user's safety.
Home safety knowledge
(1) Every family must have some necessary electrical appliances such as electroscopes, screwdrivers, and glue clamps, as well as various types of fuses and fuses that are suitable for the use of household appliances.
(2) Each household meter must be equipped with general insurance before it. The meter should be equipped with a total knife gate and leakage protection switch.
(3) In any case, it is forbidden to use copper or iron wires instead of fuses. The size of the fuse must match the capacity used. When replacing the fuse, remove the porcelain cover and replace it. Do not lap the fuse directly in the porcelain case. Do not replace the fuse in the live condition (without opening the knife).
(4) After the fuse or leakage switch is blown, the cause must be ascertained before switching on the switching power supply. Under no circumstances shall the conductors be short-circuited or pressed against the leakage switch tripping mechanism for forced transmission.
(5) When purchasing home appliances, you should carefully check whether the technical parameters (such as frequency, voltage, etc.) of the product specification are in line with local electricity requirements. It is necessary to know how much power is consumed and whether the existing power supply capability of the family satisfies the requirements, in particular whether the wiring capacity, plugs, sockets, fuses, and meters meet the requirements.
(6) When the household power distribution equipment cannot meet the capacity requirements of the household appliances, it should be replaced and modified. It is forbidden to make use of it. Otherwise, overloaded operation can damage electrical equipment and may cause electrical fire.
(7) It is also necessary to understand the insulation performance of household appliances: whether it is general insulation, reinforced insulation or double insulation. If it is grounded for leakage protection, the grounding line is essential. Even for reinforced or double-insulated electrical equipment, it is beneficial to provide protective grounding or zero protection.
(8) Household appliances with electric motors (such as electric fans, etc.) should also be aware of the heat-resistant level and whether they should be operated continuously for a long time. Pay attention to the heat dissipation conditions of household appliances.
(9) Before installing household appliances, check the requirements of the product specification for the installation environment. Pay particular attention to the possibility of not installing the household appliances in a hot, dusty or flammable, explosive, corrosive gas environment under possible conditions. .
(10) When laying indoor wiring, the connection lines and neutral lines shall be clearly marked and consistent with the wiring of household appliances.
(11) If the household appliance is connected to a power source, a switch or plug connector that can be switched off must be used. It is forbidden to insert the wire directly into the socket hole.
(12) For household appliances that require protective earthing or zero-crossing protection, three-pin plugs and three-eye sockets shall be used. Do not use two-pin plugs and double-eye sockets instead, resulting in grounding (or zeroing) of the line.
(13) It is best not to have a connector in the middle of the home appliance wiring. When there must be a connector, it should be in firm contact and wrapped with insulating tape, or a porcelain junction box. Standard medical tape instead of electrical tape dressing joints.
(14) The connection between the wire and switch, knife gate, fuse box, lamp cap, etc. shall be firm and reliable, and the contact is good. The soft plastic copper wire connector shall be twisted and then placed under the joint screw gasket to prevent the thin strands from being scattered and causing a short circuit on the other joint.
(15) Home wiring shall not be laid directly on the flammable building materials. For the wiring on wood, porcelain beads or porcelain clips must be used; through the wood, porcelain casing must be used. Do not use flammable plastics and other flammable materials as decorative materials.
(16), grounding or connecting the zero line is not charged when normal, but leakage in case of leakage will cause energized electrical enclosure shell; in the event of a short circuit, the grounding line also passes a large current. For its safety, the grounding (connected to zero) wire shall not be less than the phase conductor, and no switches or fuses may be installed on it, nor may there be joints.
(17) The grounding wire should not be connected to the water pipe (because the plugging of the tap water pipe is used for insulation, and there is no grounding effect); it must not be connected to the gas pipe (to prevent the gas explosion caused by spark); On the ground of the telephone line (in order to prevent strong electricity); also must not be connected to the lead line of the lightning conductor (to prevent counterattack when lightning).
(18) All switches, switches and fuse boxes must have a cover. Aging and incomplete parts of the bakelite cover must be replaced. Dirty and damp persons must be wiped clean after use.
(19) Do not drag and drop the power cord on the ground to prevent the power cord from coming off and prevent damage to the insulation.
(20), before the trial of household appliances should be compared with the instructions, all switches, buttons are placed in the original stop position, and then follow the instructions to open and stop the operation sequence. If there are moving parts such as a moving head fan, consider sufficient space for movement in advance.
(21) If an abnormal condition such as spark, smoke, or burnt smell is found after the household electrical appliance is energized, it shall immediately stop and cut off the power supply for inspection.
(22) When moving home appliances, be sure to cut off the power supply to prevent electric shock.
(23) Heat-emitting appliances must be kept away from flammable materials. Electric stoves, heating appliances such as heaters, irons, etc. must not be placed directly on the boards to avoid fire.
(24) Do not touch live switches with wet hands; do not pull or plug the power plug with wet hands; do not touch the metal part of the contacts when pulling or plugging in the power plug; or replace the electrical components or bulbs with wet hands.
(25) For household appliances (such as hair dryers, electric irons, etc.) that are frequently used by hands, do not use wires wrapped around your hands.
(26) For household appliances that are in contact with the human body, such as electric blankets, electric oil caps, and electric heating shoes, electric test should be conducted before use. It is only after contact with the human body that there is no leakage of electricity.
(27) It is forbidden to move the household appliances by dragging the wires; it is forbidden to use the method of dragging the wires to pull the plug.
(28) When using household electrical appliances, first insert the unpowered side socket, and finally close the knife or plug in the live side socket; on the contrary, if you disable the home appliance, first open the charged side knife or pull out the charged side. Socket, and then unplug the uncharged side of the outlet (if you need to pull out).
(29) In the event of an emergency requiring the power cable to be cut off, an insulated electrician's pliers or a knife with an insulated handle must be used.
(30) When rescuing a person with electric shock, first disconnect the power supply or use a wooden board or insulation rod to pick up the power cord. Do not pull the electric shocker directly by hand to avoid electric shock.
(31) In addition to household appliances such as refrigerators, household appliances should be turned off, especially electric heating appliances, to prevent long-term heating caused by fire.
(32) It is forbidden to use the bed switch. In addition to electric blankets, do not lead charged electrical equipment to the bed and stay close to the sleeping body. Even if the electric blanket is used, if it is not necessary to keep it warm for the whole night, it is recommended to use it after heating to ensure safety.
(33) Household appliances should be burned, smoked, and caught on fire. They must be disconnected immediately and must not be sprayed with water or a foam fire extinguisher.
(34) Conduct regular insulation inspections on indoor wiring and electrical equipment and find that the damage is timely wrapped with electrical tape.
(35) Household appliances that are not used again before the rainy season or for a long period of time shall have a insulation resistance of not less than 1 MΩ measured with a 500V megger so that the insulation can be considered good. If there is no shaking, at least the electroscope is also used to check whether there is leakage.
(36) For household appliances that are frequently used, they should be kept dry and clean. Do not wipe the surfaces of household appliances with corrosive or conductive liquids such as gasoline, alcohol, soapy water, and decontamination powder.
(37) Professionals or repairs are required after damage to household appliances
