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Why China with 220 volts, the United States with 110 volts? World countries voltage
Jun 20, 2018

Why China with 220 volts, the United States with 110 volts? World countries voltage

Often go abroad to walk a small partner will certainly find: some countries of the socket

 written 110V, rather than the Chinese socket on the 220V. Wow, is the voltage also borders, 

each country is not the same?


    So, the voltage of 220 volts is Chinese characteristics?

      Look at the voltage of a group of civil electricity

    100 volts

    Only 2 countries

    Japan, North Korea

    110 to 130 volts

    About 30 countries (regions)

    The United States, Canada, Panama, Cuba, Lebanon, Mexico and other countries and China Taiwan

    220 to 230 volts

    About 120 countries

    UK, Germany, France, China, Singapore, Hong Kong (200V), Italy, Spain, Greece, Austria, 

the Netherlands, Philippine, Thailand, Norway, Singapore, India, New Zealand, Australia

   (Of course, in countries with 220 to 230 volts, there are also areas requiring 110 to 130 volts

, such as Sweden, Russia.)

    Listen to the power grid Jun introduced finished, a small partner finally relieved, the 

original, the world with 220 volts AC country or a lot of. However, the problem is not finished:

 why China and the United States do not use the same as the 110-volt AC? Little partner naive idea

 is: the voltage is low, seemingly safe ah.

    This problem is more complex, listen to the grid Jun slowly Road to.


In 1879, Edison produced a relatively good effect of carbon wire incandescent, incandescent lamp

 at 110 volts DC voltage is running well, Edison that this is the safe and economical voltage 



    But later, another voltage level - 220 volts is also recommended in the low pressure field. 

In the two talented Edison, Tesla on the "strong or strong communication" problem arrogant, the 

United States began to generally use the 110-volt AC. Of course, the United States in the 

development of the power system in fact there have been a lot of voltage types, but the 110-volt

 and 220-volt-based, and in the development process 110V gradually win.

    With the progress of today's electrical, transmission means of development, 110 volts and 

220 volts in fact no difference between the use.

    So, why do not we learn the stars of the country, the use of 110 volts AC voltage?

    Because, in the United States after the use of 110 volts AC voltage, Europe that 110 volts 

is too low, in the transmission of a lot of loss (then, transformer and high voltage transmission

 is not very common), driving some electrical appliances are not enough to force Pushing 220 volts

, and was later inherited by most countries.

old china

We all know that the old China's productivity is low, the economy can not, can reduce a little loss, reduce the consumption of copper and other metals, of course, is very good, 220 volts easily accepted by the power supply operators. (1890) Shanghai began to use incandescent lamp, the voltage is 100 volts, Guangxu twenty-seven years (1901) Shanghai public concession began day and night power supply, the voltage changed to 200 volts.


     On September 12, 1930, the National Government published the first voltage frequency standard in China in the form of a construction committee, prescribing 220 volts and 50 hertz as the standard voltage and standard frequency of China.

     After the founding of new China to be abandoned, can save a little of course, is also very good. Therefore, many times to develop the "rated voltage and frequency standards" and "for electricity rules", are followed by 220 volts as a standard.


So what about the 110-volt electricity than the 220-volt electricity?

     In principle, the lower the voltage the higher the natural safety. It was calculated that

 110 V would take longer than 220 volts and a difference of about 100 milliseconds in the time

 when the physical response to the human body is fatal or even fatal, but actually 110 volts 

and 220 volts are much larger The range of safety voltage. In addition, when the electric shock,

 the real decision is the safety of the current through the size, so whether the danger, but also 

depends on the electric shock environment.

     Another small partner is very concerned about the problem is:

     Some commonly used appliances to bring abroad to use, will be due to voltage differences 

and problems?

heating element

Equivalent to a voltage system of ordinary electrical appliances to go abroad to use, the voltage

 is generally not a problem, because most of the electrical appliances have 20% of the voltage

 floating range such as electric stove, rice cooker, etc., even if the voltage in the country 

sometimes the highest Also up to 250 volts, so the voltage of 230 volts is just getting them to 

heat up faster and not much of a problem.

    For those who require strict voltage and more expensive electrical appliances, even if the 

same voltage system, if the voltage is different or recommended to use the tourism transformer,

 so as not to burn electrical appliances or affect the electrical life.

    If the high-voltage electrical appliances to low-voltage countries to go, such as China with

 220 volts of electrical appliances to the United States 110 volts environment, under normal 

circumstances can not be used, even if barely can often be used to linger or as cattle Use 

function greatly reduced.

    However, in the context of globalization, some clever international companies may have noted

 the differences in voltage across countries, so the design of a lot of electrical appliances have 

their own voltage, which can be suitable for 110 volts -240 volts, such as Haier Color TV floating

 range are marked: AC 90-260 volts, 50 Hz, so the voltage of 90 to 260 volts can be used as usual.

 Of course, if you often go abroad, the general travel agencies are advised to go abroad to bring 

their own travel conversion plugs and tourism transformers.

Add: No. 16, Road 3, Sanjiang Industry Zone, Shengzhou, Zhejiang, China

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