A plug is a device that is connected to the AC power supply in a building. There are different types of plugs and sockets. Their main difference is in the voltage rate, amperage, the size of the two plugs, and the type of connections. Both plugs or sockets have standards in every country. based on which it is produced, sold and used.
Why does each country have its own standard?
At that time, some electrical companies and factories had a shared tariff system, in which the cost of electricity for lighting was lower than for other purposes and uses. which allowed low voltage devices to be connected to optical connectors. As the need for secure installation grew, the three-pin electrical outlet was developed. The third pin was a ground output pin that was effectively connected to ground. This is the neutral supply line. The idea behind this line was that if shorted to ground, the fuse could blow and thus cut off the power supply.
This is why in the world There are currently 15 different plug styles. Many countries prefer to develop plugs with their own standards instead of adopting the American standard. Of course, these countries were also right. The loose, trembling and inflexible forks of the Americans were almost old-fashioned in terms of design and disappointed one during work.