Which is better plug 2 or 3 plug?

Three plugs are good. Chinese standard power plug Power plug can generally be divided into 2-pin power plug, 3-pin power plug and multi-pin power plug. 2-pin power plug:

As the name suggests, the 2-core power plug is that the plug has two plugs or two pins, and the specific plugs or pins are different for each country, for example, China's is two plugs, and Europe's is two round pins. 3-pin power plug: As the name suggests, the 3-pin power plug has 3 tabs or 3 pins or two tabs or two pins plus a grounding hole.

Such a structure is more complex than a 2-pin power plug, and the size and diameter of the pins have great requirements, and the length and distance between the pins are all factors to consider. Injection power plug: The injection plug is that the plug and the wire are pressed together by high temperature and high pressure, once formed, it can not be assembled and disassembled, such a power plug has obvious characteristics, stable and safe.

More than 80% of the power plugs in circulation on the market are this kind of power plug. Assembling the power plug: The assembly plug is that the power cord and plug are fixed together through screws, etc., but they can be assembled and disassembled during use, so as to ensure the flexibility of the power plug.

In the UK, for example, a large proportion of the market uses this type of power plug. 2-pin power plug: 2-pin power plug, as the name suggests, is that the plug has two plugs or two pins, and the specific plugs or pins are different for each country, for example, China's is two plugs, and Europe's is two round pins.

3-pin power plug: As the name suggests, the 3-pin power plug has 3 tabs or 3 pins or two tabs or two pins plus a grounding hole. Such a structure is more complex than a 2-pin power plug, and the size and diameter of the pins have great requirements, and the length and distance between the pins are all factors to consider.

Three-pin power strip.

The safety performance is higher, and the three-pin power strip is set up because of the three-phase power supply, which is a simple device to provide convenient power supply for the three-phase electrical equipment.

The power supply provided by the tripod power strip is generally 380V AC power.

Compared with the two-corner plug-in board, the three-pin plug-in board has the advantages of changing the plug phase sequence, flexible and convenient use, arc isolation, rainproof and dust-proof, safe and reliable to use.

What is the difference between a two-pin plug and a three-prong plug.

1. The difference in power.

The two-pin socket is used for electrical equipment with two-pin plugs, and the internal current is about 10 amperes, which can meet the needs of low-power electrical appliances below 2200 watts.

The three-pin socket is connected to the ground wire.

There are 10 amp and 16 amp types, of which 16 amp sockets can be used for electrical appliances with a power of less than 3500 watts.

2. The difference between the objects of use.

The two-pin socket is generally used in low-power electrical appliances, the left wire is connected to the neutral wire, and the right wire is connected to the live wire.

The three-pin socket is used on high-power electrical appliances, there are three holes, the left wire is connected to the neutral wire, the right wire is connected to the live wire, and the other jack is the ground wire, which can avoid the live of the metal electrical shell.

3. The difference in security.

Compared with the two-pin socket, the three-pin socket has a ground wire and can be connected to the housing of a metal electrical appliance. When the electrical appliances are used in the later stage, if there is a leakage phenomenon, the user can be protected from the danger of electric shock.

What to pay attention to when connecting the socket.

1. Before connecting the socket, the power supply should be cut off, and the live wire and neutral wire should be distinguished clearly, so that there will be no danger of electric shock in the process of connection, and the normal use of the later stage is ensured.

2. The quality of the wire box should not be problematic, otherwise it will be easy to cause all kinds of troubles when it is used in the later stage. If the wire box is accidentally broken during installation, it needs to be replaced in time and cement mortar is used.

Secure the wire box.

The plug is well plugged in three times, and the premise is to have a commonly used grounding wire;

If there is no grounding wire, the two-pin and three-pin plugs are the same.

There are two holes and three holes in the socket plug at home, and the two are not the same, so what are the specific differences? Let's take a look.

The power is different The two-pin socket is used for two-pin plugs, which are usually 10A, and the electrical power is relatively small, and the power should be controlled below 2200 watts. Three-pin sockets are available in 10A and 16A, and the 16A three-pin socket can withstand electrical power up to 3500 watts.

The two-hole socket is mostly used for low-power electrical appliances, and according to the safety of electricians, it is the left zero and right fire wiring. Three-pin sockets are mostly used for high-power electrical appliances, two of which are parallel to the left zero and right fire, while the other jack is grounded in the socket, and the corresponding pin on the plug is connected to the shell of the electrical appliance.

The safety is different, compared with the three-pin socket, the two-pin socket is more likely to have a ground wire interface, which communicates with the metal shell of the electrical appliance. If there is leakage of electrical appliances, it can protect users from electric shock accidents.

In household appliances, all appliances with plastic shells that do not affect the shell and live are used at two ends. Such as induction cooker, hair dryer, electric fan, etc. Electrical appliances with metal shells, and three-phase (head) heads are used for the shells that are easy to be electrified, which is convenient for the shell to be grounded.

Such as refrigerator, washing machine. Oven, microwave, etc.

Two legs: all plastic shell appliances, plastic fans, TVs, video discs, set-top boxes, three legs: all metal shell appliances, iron case fans, rice cookers, induction cookers, electric baking phases, heaters, refrigerators, washing machines,

If there is a need for grounding, a three-pin plug should be used; Use a two-pin plug if there is no need for grounding.

There is no three-phase power plug for civil sockets, because civil electricity only uses single-phase alternating current.

Power plugs for household appliances are available in two-pin and three-pronged versions.

The two-legged ones are mainly used in low-power electrical appliances with plastic shells, such as pulverizers, small fans with plastic shells, color TVs, disc players, vacuum cleaners, etc., and the electrical appliances themselves are relatively safe and will not cause leakage and injury accidents.

Most household appliances, for safety, will be shell grounded, so the power supply must have a phase wire, neutral wire and ground wire, such as washing machines, air conditioners, microwave ovens, etc., to ensure the safety of users.

From the perspective of electrical appliances and personal safety, three ends are safer than two ends. In terms of portability and use, two heads are more convenient than three heads, especially some portable fans or charging shaving and chargers are tall.