How to connect the power plug What types of power plugs are there?

Now there are more and more electrical products, all of which need power supply. Therefore, every electrical appliance has a power plug, which is mainly used to connect electrical equipment. The specifications of power plugs in different countries are also different. For example, the size, specifications, grades and models of power plugs are different. The voltages of power outlets used in China are 250V, 125V and 36 V. And the current used is 16A, 13A, 10A, 5A? 2.5A The frequency is generally 50/60Hz. Then Bian Xiao will tell you about power sockets.

How to connect the power plug

The left pole of single-phase 2-hole socket is connected to N line (zero line) and the right pole is connected to L line (live line); The left pole of single-phase three hole socket is connected to N line, the right pole is connected to L line, and the middle pole is connected to E line (protective ground wire); The left pole of the three-phase four-hole socket is connected to L3 line (live wire 3), the right pole is connected to L 1 line (live wire 1), the upper pole is connected to E line, and the lower pole is connected to L2 line (live wire 2).

All household appliances with metal shells use single-phase three-wire power plugs. The three plugs are arranged orthogonally, and the longest and thickest copper plug on the top is Dadi (? Wire), the grounding wire has a special grounding symbol.

The two wires below the ground wire are live wires (the sign letter is "L"? Live broadcast? Wire), neutral line (the symbol letter is "n" neutral? Wire), the order is left zero and right fire.

If the wires are not connected according to the color of the standard specification, it is difficult to distinguish the neutral wire from the ground wire. If the power supply has a leakage protector, plug the socket into the appliance. If it trips, it means that the neutral wire is actually the ground wire; If you don't jump, you are right.

It is best to use standard conductor colors when applying: A line is yellow, B line is green, C line is red, N line is light blue, and PE line is yellow-green.

In a single-phase lighting circuit, generally yellow means live wire, blue means zero wire, and yellow and green means ground wire. In some places, red indicates the fire line, black indicates the zero line, and yellow and green indicates the ground line.

Firewire (live in English? Wire)L？ Usually red, yellow or green.

Neutral n (neutral line) is generally blue.

Ground wire (English EARTH)E? Generally yellow-green or black.

Three-pole power plug, the shell of electrical equipment is connected with the grounding end of three-core power plug through wires, and this plug needs to be inserted into a three-pole socket.

What types of power plugs are there?

Power plugs can be roughly divided into conversion power plugs, injection power plugs and assembly power plugs.

Switching power plug: the standard of power plug in each country is different. For example, the power plug in China can't be used in the United States, and a conversion plug is needed to complete the conversion. This requires replacing the power plug. Modifying the power plug is to modify one GB plug into another GB plug.

Injection-molded power plug: Injection-molded power plug means that the plug and wire are pressed together by high temperature and high pressure, and once molded, they cannot be assembled or disassembled. This power plug has obvious characteristics and is stable and safe. More than 80% universal power plugs on the market are of this kind.

Assembling the power plug: Assembling the plug means that the power cord and the plug are fixed together with screws, but they can be disassembled during use, thus ensuring the flexibility of the power plug. For example, a large part of the British market is using this assembled power plug.

The above is what Bian Xiao told you about the power socket. I hope you can better understand the power socket after reading it. Power socket is very important in our life, and it is also brought by many electrical appliances. There are many kinds of power sockets, the most common ones are switching power plugs, assembled power plugs and injection-molded power plugs. Moreover, power sockets are widely used in household appliances, communication fields and other industries. Power sockets are directly connected with electricity, and their safety performance is very important, so everyone must pay attention to safety when purchasing.