April 4, 2024
Category: Education and 3 others
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Many electric plugs often have 2 small holes in the 2 pins because they create functions to help protect users.
Electric plugs usually have flat or round pins. These pins usually have round holes at the top of the pin. Many consumers do not pay attention to these small details, and even when they look at them, they do not understand their meaning.
In fact, these two round holes will help the plug stay fixed and more secure. Inside a standard electrical outlet there is usually a raised part that fits neatly into this round hole, helping the plug base to contact more firmly with the two metal bars inside the outlet. That helps minimize the risk of exposed legs and electrical leakage. Therefore, flat plugs are one of the ideal choices for families with young children to prevent electric shock.
Previously, people designed stamped indentations on the socket pins. However, this method can easily cause friction when inserting the plug into the socket and cause a short circuit of sparks. Therefore, using perforated holes will help minimize friction when first plugged in, avoid short circuits, and be safer for users.
Round holes on the power plug pins make it safer for users
Manufacturers also take advantage of the two holes at the plug's base to attach seals, helping consumers distinguish between new and used goods.
In addition, these two round holes, although small, still help manufacturers save a significant amount of steel, especially in large-volume production lines.
Origin of this round hole: This is the creation of Harvey Hubbell Jr., who worked hard to find a way to make the plug easier to enter the socket. His initial solution was to add small indentations inside the plug pins; they will come into contact with protrusions inside the socket. Eventually, the indentations were replaced by holes, although the basic idea remained the same.
Basically, there are only two types of flat-pin electrical plugs that use perforated pins: Type-A plug with two flat pins; Type-B plug with flat pins and a round anti-shock ground pin. These types of plugs are popular in the US, Canada, Japan and some other countries. This standard is also known as the NEMA standard.
Meanwhile, in many other European and Asian countries, round pin plugs are still more popular and this type of plug does not need to have holes, because the round pin and round socket design provides better grip. .
Therefore, when buying a power plug, you should pay attention, especially if your family has young children.
Round pins do not require holes
How to choose and buy a safe socket
Many people, when buying plugs and electrical outlets, often think that they are electrical equipment, so they do not have the skills to choose carefully and also think that there is no need to be careful. But did you know that if you buy the wrong low-quality socket, many problems will arise such as: electric arc phenomenon (self-powered generation) leading to explosions, short circuits, and shortening the life of refrigerator machines. , washing machine, TV... The device melts plastic during use, thereby causing a fire, dangerous to human life. Therefore, when buying electrical outlets and power plugs, you need to pay special attention to:
- Consumers should choose to buy sockets and plugs at genuine stores. Regarding materials, priority is given to fire-resistant and heat-resistant plastics such as ABS, PVC...
- Before choosing a plug socket, you need to consider the capacity of the socket. If the demand is high, you should choose to buy high-capacity sockets with a breaker switch to help cut off the electric current when the socket's capacity is exceeded. The larger the number of devices and the higher the capacity, which will easily lead to unwanted electrical fires.
- When purchasing, check the product for cracks, broken wires, open wires or other defects. It is best to choose to buy a product with an insurance and warranty package to ensure your purchasing rights.
- It is necessary to follow the instructions for use from the supplier on how to use sockets and plugs; Check plugs and electrical outlets regularly. Note, do not hold the power cord of the plug when removing it from the electrical outlet, and do not place the outlet in wet areas.
