Why are there two holes in the header? What exactly is it used for?

In my life at home, I will find that many designs are useless and cannot be used in daily life. Although these small details are actually good "knowledge", there are certain industry norms, but such professional knowledge cannot be applied to daily life, so I don't care about it. Also, the two small holes designed for the plug are useless, but there are actually many uses.

Why are there two holes in the header? What exactly is it used for? Let's talk about it.

For the production of plugs, it cannot be carried out arbitrarily, and the relevant industry standards must be implemented. At the same time, since many enterprises are currently engaged in the export business of plugs, the production of plugs will be carried out in accordance with foreign standards, so there are no plugs of different shapes on the market. In basic industry, there is no provision that holes should be designed in plugs, but in the form of flattening.

Therefore, the two holes designed on the plug are not required from the relevant domestic regulations. In fact, the plug is designed with two small holes, which do not affect the quality of the plug itself, but add many safety advantages. In this way, the plug can be in better contact with the socket, safer to use, more assured to use, and at the same time avoid the safety problems caused by poor contact between the plug and the socket.

The plug is designed with two holes, and the plug is a male connector with protruding pins, which matches the opening and female contact on the socket, so that the chip protrusion in the socket coincides, so that the "lock" is naturally formed, so that the connection between the plug and the socket is increased. At the same time, when using electrical appliances to connect the socket, when the socket needs to be raised, the plug can be well connected to the socket without the need to separate the plug from the socket. When working at height, the connection between the plug and the socket should be firm.

The two holes in the plug are well connected with the bumps in the socket, which ensures the safety of the plug connection to the socket and the safety of the baby. This design is very user-friendly and attentive. After designing two small holes in the plug, whether it is connecting the two holes with a rope or locking one of the holes with a small lock, it can ensure that the plug cannot be inserted into the socket, ensure the safety of children playing, and avoid electric shock accidents.

Many sockets are designed with two holes. More convenient to use, design two holes, one hole will be grounded more safely.

After adding these two small holes, the contact will be clamped by two metal pieces inside, so that it can fit well with the protrusion on the metal sheet, so that the plug is not easy to fall.

The two small holes in the plug can be used to hold the plug in addition to other small uses. We sometimes see some special sockets

Because of different electrical appliances, some use three-pin sockets, and some use two-pin sockets. The enclosure of televisions, induction cookers, etc., is a two-pin plug for non-metallic electrical appliances. Washing machines, refrigerators, air conditioners, electric water heaters, range hoods, rice cookers, soybean milk makers, etc., are shells with metal three-pin plugs for electrical appliances.

For electrical appliances with metal shells, under normal circumstances, the shells are not electrified, and it is safe for people to come into contact with the shells. Once the shell is electrified, if it is not grounded, and the person touches the shell, the current will flow through the human body to the earth, causing an electric shock accident; If the enclosure is grounded, the current flows to the ground through the ground wire, and there is no danger for a person to come into contact with the enclosure.

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Can a two-hole plug be used on a three-hole socket, the answer is as follows: it can't be plugged in, because of the big safety hazard.

First of all, the prong design of the two plugs is different, the prongs of the two-hole plug are generally in a parallel state, and the three-hole plug has an additional ground prong, and the two prongs below are not horizontal, so the two-hole plug cannot be used on the three-pin socket. If you have to use a two-pin plug in a three-prong position, it is advisable to purchase a new socket panel to avoid leaving hidden dangers. Additional Information:

The metal pieces of the two-pronged plugs should be broken at an angle to fit the angle of the two holes at the bottom of the triangle socket. Although the two-pin plug can be plugged into a triangular socket, it is strongly discouraged for safety reasons. Because of this use, the grounding function is lost, and it is extremely unsafe for the human body.

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Can a two-pin plug be used on a three-pin socket?

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Can a two-hole plug be used on a three-hole socket, the answer is as follows: it can't be plugged in, because of the big safety hazard.

First of all, the prong design of the two plugs is different, the prongs of the two-hole plug are generally in a parallel state, and the three-hole plug has an additional ground prong, and the two prongs below are not horizontal, so the two-hole plug cannot be used on the three-pin socket. If you have to use a two-pin plug in a three-prong position, it is advisable to purchase a new socket panel to avoid leaving hidden dangers. Additional Information:

The metal pieces of the two-pronged plugs should be broken at an angle to fit the angle of the two holes at the bottom of the triangle socket. Although the two-pin plug can be plugged into a triangular socket, it is strongly discouraged for safety reasons. Because of this use, the grounding function is lost, and it is extremely unsafe for the human body.

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This kind of three-pin socket, can you plug in a two-pin plug, the plug is like this.

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Pro-can, the three-hole socket can be plugged into a two-hole plug, the two-hole plug is generally not a big hidden danger to static electricity, it can be used with confidence, the circuit is in parallel, the voltage must be the same, of course enough. However, it is better not to plug in a two-pin socket than a three-pin plug; Electrical appliances are three-pin plugs, and the static electricity generated by the electrical appliances reaches a certain amount, which will cause electric shock to the human body. It is very useful to understand what switch is installed on the zero line, left zero right fire, red fire blue zero and other basic common sense.

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Because sometimes my home appliances bought from the mall have 3 heads, some have 2 heads, oneGenerally, the electrical appliances with large power consumption are 3 heads, and the relatively small power consumption is 2 heads.

The three-hole socket has a neutral wire and a live wire in addition to it. There is also a grounding wire, which is mainly to prevent power leakage and injure people. The general standard of household appliances is that all need to have a grounding wire, that is, to use a socket with 3 holes, but some manufacturers produce such as foreign companies or unqualified electrical appliances or electrical appliances that are not easy to leakage, usually only use two holes and ignore the grounding wire, if the plug has three holes, we should not change it to two holes to prevent leakage.

Especially large appliances such as induction cookers, electric heaters, televisions, air conditioners, refrigerators, etc.

In the intermediate point non-grounding power supply measures, it is necessary to protect the correct wiring method of the three-hole plug board. In neutral grounding systems, the device enclosure can be used for zero protection. But these two protections cannot be shared in a low-voltage grid at the same time.

There is a feature that uses protection zero connections. The "phase" to "zero" short-circuit currents generated by neutral grounding protection electrical equipment, such as insulation damage, are higher than "phase".

In fact, I know a lot of people didn't notice the issue before I said it, but now you pretty much understand the stuff! In this case, I think you also have your own ideas, whether it is a three-pin socket or a two-pin socket, or the connection method, you have already mastered it.

The general standard of household appliances is that all of them need to have a grounding wire, that is, they need to use a three-pin socket, which is also divided into power consumption.

Because the power is 3 jacks, and the power consumption is 2 holes.

In addition to a neutral wire, a live wire, and a ground wire, the socket of each hole has a grounding wire.

The three jacks generally have a large power consumption, and the two jacks have a small power consumption.

Generally, the high-power ones are three-jack, and the low-power ones are two-jacks.