The power socket is a widely used device in household electrical appliances. Whether it is selected properly and whether it is installed reasonably is directly related to human safety and quality of use. The two jacks of the single-phase two-pole socket are the "phase" line and the "zero" line. The single-phase three-pole socket has three ring holes, which are "phase", "zero", and "ground" three wires. The ground wire should be reliably grounded. The three-phase four-pole socket is connected to the three-phase power supply and the ground wire, and the ground wire end is usually marked. Some sockets are marked with "E" (ground), "A", "B", "C" (phase wire), "L" (all refers to phase wire), and "N" (zero wire) beside the jack. .

When using a power socket, pay attention to choosing different capacities according to the power of the electrical appliance. At the same time, the insulation class, voltage resistance, heat resistance, temperature rise, rust resistance, and impact resistance of the socket should meet the requirements. In addition, the quality of the socket workmanship should be checked. The ground electrode should be in contact before the conductive electrode when plugged in, and should be separated from the conductive electrode when unplugged. Our national standards stipulate that the plug type of plugs and sockets is flat, round or Other types, such as the arc type, are not national standards and should not be used.

Pay attention to the following points when installing the power socket.

①The installation height of surface-mounted sockets should generally be 1.3-1.8m to prevent children from touching. If the height is less than 1.3m, a protective plate should be added when the wire is applied directly. However, under any circumstances, the distance between the socket and the ground shall not be less than 150mm, and the residential area and children's activity place shall not be less than 1.3m. The concealed installation is allowed to be 300mm above the ground.

②Each stand must be equipped with a fuse for protection. For electrical equipment of 1kW and above, a knife switch should be installed before the play stand.

③For different voltage levels, such as 220V, 127V, 36V, etc., different types should be adopted or obvious signs should be made.

④ The ground terminal should be directly connected to the ground wire reliably, and it is strictly forbidden to replace the ground wire with a neutral wire.

⑤Three-pole single-phase power ring, the left hole is the neutral wire, the right hole is the phase wire, and the upper hole is the ground wire. Two-pole single-phase socket, the two holes should be placed up and down, the upper hole is the phase line, and the lower hole is the neutral line.

Note: The installation height of electrical switches, sockets, etc. is different due to the climate environment and air humidity in various regions, and their implementation can be implemented in accordance with the relevant regulations of the power supply department of each province.