Why all over the world are different rosettes

We do not think about such a common thing as an electrical outlet, until we go on a trip. And there, as well as at home, we have to regularly charge the smartphone or use a hairdryer.

Visa-support-to-russia.ru found out why not all countries have our gadgets and appliances compatible with local networks.

As far as the development of electrical networks in the world there were a variety of types of sockets. Various types of power generators were built, which also had an impact on the design of the connectors. Companies that were engaged in the installation of electrical networks, also supplied devices suitable for these networks — each company they had their own.
Some of the outlets created at the time (in a modernized form) are used today, and others were decided to abandon for security reasons. But until now in the world there is no single standard for all electric networks — in different parts of the world the voltage and frequency of the current can differ.
Voltage 100-127 V at a frequency of 60 Hz use the United States, Canada, Japan, Mexico, Cuba, Jamaica, in part Brazil and other countries.
Voltage 220-240 V with a frequency of 50 Hz is used in most other countries, but with the same parameters, the type of outlets can vary greatly.
There are 12 main types of outlets in the world (15 according to another classification). Here is a brief description of some of them.
Types A and B — American socket

Type B differs from A by the presence of a third hole — it is intended for a grounding pin. Such rosettes, as you can guess from the name, were invented in the US and distributed to the territories of North, Central and partly South America, as well as Japan and some other countries.
Types C and F — European outlet

Just like A and B, types C and F differ only by the presence of grounding — it is in F. The European outlet is used in most EU countries, as well as in Russia and the CIS, Algeria, Egypt and many other countries.
Type G — British outlet

In the UK, the socket has three flat holes, and this design has appeared for a reason. The fact is that during the Second World War, the country was experiencing copper deficiency. Therefore, a plug with a short copper fuse and three plugs was designed. In addition to the UK, the same outlet is used in Cyprus, Malta, Singapore and other countries that have experienced the influence of the British Empire.
Type I — Australian outlet

This type of outlet can be found not only in Australia, but also in New Zealand, Fiji, the Cook Islands, Kiribati, New Guinea, Samoa and sometimes in China, where types A and C are also common.
Type H — Israeli socket

Type H is used only in Israel and Palestine, and the fork pins can be both round and flat — this depends on when the device was manufactured. The flat form of the outlet was in the old technique, but the new sockets are suitable for two options.
Type K — Danish socket

This outlet can safely claim the title of «the most friendly» in the world — its design resembles a smiling face. In addition to Denmark and its constituent Greenland, type K is used in Bangladesh and Maldives — however, several types of sockets are common at once.
Fortunately, all these differences will not spoil your vacation or business trip — you just need to purchase a suitable adapter in advance.