There are several types of plugs, and there are several models of plugs

Usually electricians are divided into: external line electricians, internal line electricians, installation electricians, maintenance electricians, operation duty electricians, instrument electricians, etc., and they are independent and interconnected.

1. External line electrician.

External line electricians refer to electricians engaged in the installation of overhead lines, outdoor substation and distribution devices, and cable lines. Generally, large-scale substations have more external electricians.

2. Internal line electrician.

An internal electrician is an electrician engaged in the installation of indoor substation and distribution devices, indoor lighting and power electrical circuits, indoor electrical equipment and components. Such as the installation of high and low voltage switchgear and distribution cabinet in the distribution room.

3. Adjust the test electrician.

Adjustment test electrician refers to the electrician who is engaged in the adjustment test of electrical equipment components and circuits, and conducts power transmission test run and trial operation.

4. Maintenance electrician.

Maintenance electrician refers to an electrician who is engaged in the repair, maintenance, overhaul, and repair of electrical equipment, components, and lines, as well as general fault judgment and treatment, and replacement of equipment, components, and lines. That is, the repair and maintenance of electrical equipment such as high and low voltage switchgears and distribution boxes.

5. Electrician on duty.

The electrician on duty refers to the electrician who monitors, controls, adjusts, and records the operation status and technical parameters of the substation and distribution devices and lines.

6. Motor repair electrician.

Motor repairer or fitter refers to the electrician who repairs damaged electrical equipment and components to restore them to their original good state and performance, maintain the original technical parameters and can be used and operated safely.

7. Electrician and instrumenter.

Electrician instrument worker refers to the electrician who is engaged in the calibration, verification, repair and installation of various electrical instruments.

8. Radioworker.

A radiologist refers to an electrician who is engaged in the installation, commissioning, maintenance, and repair of wireless transmitting and receiving systems.

9. Instrument electrician.

Instrument electrician or instrument worker refers to an electrician engaged in the measurement, regulation, control equipment and line installation, commissioning, operation, maintenance, repair and calibration of temperature, pressure, flow, level, mechanical quantity and other non-electric quantities.

There are 3 types of power plugs according to the number of jacks: 2-core power plug: that is, the plug has two plugs or two pins, and the specific plugs or pins are different in each country, for example, China's is two plugs, and Europe's is two round pins.

3-pin power plug: The plug has 3 tabs or 3 pins or 2 tabs or 2 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.

Multi-core power plug: 4-core power plug and 5-core power plug are in accordance with customer requirements, and the specific equipment used in which should be considered according to the actual situation. There are 10 amps, 15 amps, 20 amps, and 50 amps.

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.

Summary. At present, the wall switch and wall socket on the market are divided into specifications according to size, and the main specifications are 120 series, 118 series, 86 series, etc. (1) 120 series refers to the switch socket product with a length of 120 mm and a width of 78 mm.

2) 86 series refers to the switch socket product with a length of 86 mm and a width of 86 mm. (3) 118 series refers to the switch socket product with a length of 118 mm and a width of 78 mm.

At present, the wall switch and wall socket on the market are divided into specifications according to size, and the main specifications are 120 series, 118 series, 86 series, etc. (1) 120 series refers to the switch socket product with a length of 120 mm and a width of 78 mm. 2) 86 series refers to the switch socket product with a length of 86 mm and a width of 86 mm.

(3) 118 series refers to the switch socket product with a length of 118 mm and a width of 78 mm.

At present, the common panel switch socket in China can be divided into three types, 86 type, 120 type, 118 type, all three of which have corresponding standards. The front of the 86 type switch socket is generally 86mm 86mm square (the size of individual products varies slightly due to the appearance design). On the basis of the 86 type switch, the 146 type (146mm 86mm) and the switch socket installed by the multi-position confederation are derived.

The Type 120 switch socket originated from and is currently the most common in China and Zhejiang Province. The front is 120mm 74mm and has a vertical rectangular shape. On the basis of the 120 type, a 120mm 120mm large panel is derived to combine more functional parts.

The 118 type switch socket is produced by domestic manufacturers according to the habits of Chinese after the 120 type standard entered China.

1. Conversion socket: In fact, the conversion socket is the type of socket that we usually use when we go abroad for business trips or tourism, which is a socket that can combine multiple plugs and multiple sockets in one, and different countries have different standards for this socket. 2. Socket row:

Also known as a strip or drag strip, this kind of socket is composed of two parts, the plug and the socket of the power cord, and can often be seen in our lives. The biggest feature of this type of socket is that it can move a certain distance, and it can also insert many plugs, both two-pin plugs and three-pin plugs. 3. Industrial sockets:

Literally understood, this is a socket for industrial use. According to the national standard, industrial sockets include national standard sockets and multi-functional sockets. Hope the above is helpful to you.

1. What are the types of plugs?

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

1. Conversion power plug: The power plug standard of each country is different, for example, China's power plug to the United States, it cannot be used, and a conversion plug must be needed to complete the conversion. This requires a power plug change.

Switching power plug is to convert a national standard plug into another national standard power plug.

2. Injection 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. More than 80% of the power plugs in circulation on the market are this kind of power plug.

3. Assembling the power plug: The assembly plug is that the power cord and the plug are fixed together through screws, etc., but they can be assembled and disassembled during use, which proves the flexibility of the power plug. In the UK, for example, a large proportion of the market uses this type of power plug.

What is the difference between two, three plugs and two plugs.

1. The wires connected are different, the three-end plug is connected to the live wire, the ground wire and the neutral wire, and the two-end plug is connected to the live wire and the neutral wire.

2. The pins are different, the three-ended plug is three pins, and the two-ended plug is two pins.

3. The safety factor is not the same, and one of the pins of the three-ended plug is connected to the bottom line to prevent leakage and electrical burnout, but the two-ended plug does not.

4. The output current is not the same, and the output current of the three-pronged plug is a little higher than that of the two-pronged plug.

5. The use is different, the three-end plug is mainly used in high-power electrical appliances, while the two-end plug is mainly used in small-power service and content electrical appliances.