Power adapter voltage knowledge in countries around the world

Issue Time:2006-05-30
There is no standard supply voltage and frequency in the world, that is, the number of times the current direction changes per second, which is different everywhere. In addition, plug shapes, plug holes, plug sizes and sockets are not the same in many countries. There are many inconveniences in the differences that are not important on the surface.

Most products are easy to buy abroad, but you can't connect to the power supply when you get home. There are two ways to solve this problem: you can cut off the original plug, replace it with a standard plug in your country, or buy an inconvenient and ugly power adapter.

Although it is easy to buy a plug adapter or a new local plug for your foreign product, in most cases, the problem is only half solved because the voltage may be inconsistent. The 110V electrical products designed for North America or Japan, if plugged into a European outlet, will showcase a beautiful fireworks show that produces sparks and smoke. Without a single voltage, frequency and global standard plugs, manufacturers will incur additional costs and increase external burdens, pure waste and unnecessary pollution!

Most countries in Europe and the world use twice as much voltage as the United States. That is between 220 and 240V, but the voltage is between 100 and 127V in most parts of Japan and the United States. The original European voltage was also 110V, the same as Japan and the United States today. Later, they believed that increasing the voltage with the same diameter of the copper wire would reduce the power loss. At that time, the United States also wanted to change, but because all electrical products required replacement costs, they decided not to do that.

Now all new American buildings divide the 230V voltage by 115V between the neutral and the live line. Larger products, such as ovens, are connected to a 230V power supply. Americans with European equipment connect their products to other outlets. There are now 175 countries worldwide that use 220-240V (50 or 60Hz). Other 39 countries use 100-127V.

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