Power and plug standards around the world

There is no standard power supply voltage and frequency in the world, that is, the number of times the current direction changes per second, and it varies from place to place.

Also, plug shapes, plug holes, plug sizes and sockets vary in many countries. Those differences that are not superficially important

However, there are many inconveniences.

Most products are easy to buy abroad, but can't be connected to the power supply when you take them home. There are two ways to solve this problem: you can

Cut the original plug and replace it with your country's standard plug, or buy an inconvenient and ugly adapter.

While it's easy to get a plug adapter or a new local plug for your foreign product, in most cases the problem is only

Half of the solution, because the voltage may be inconsistent. 110V electrical products designed for North America or Japan if plugged into a European socket

There will be a beautiful firework show - sparks and smoke.

Needless to say, the absence of a single voltage, frequency, and global standard plug would incur additional costs and burdens on manufacturers.

Pure waste and unnecessary pollution!

voltage and frequency

Europe and most countries in the world use twice the voltage of the US. That is between 220 and 240V, but in Japan and the US

The voltage in most areas is between 100 and 127V.

The three-phase alternating current generation and distribution system was invented by nineteenth century inventor Nicola Tesla. He did many

Calculated and measured and found that 60Hz (Hertz, cycles per second) was the best frequency produced by AC power. He chose 240V, and

Thomas Edison's opinion that the DC system voltage is 110V is divided. Perhaps Edison is based on safety

Factors consider low voltage, but DC cannot provide the long-distance power that AC can.

When the German company AEG built the first European power supply, its engineers chose a frequency of 50Hz because 60 can't

Meets the standard unit order of measurement (1, 2, 5), at which time AEG was patented and their standards extended to the rest of the continent

In the UK, different frequencies proliferated and the 50Hz standard was not established until after World War II, which was a big mistake.

50Hz power supply will not only lose 20% in the process of production, but also lose 10-15% in the process of transmission, it needs to be in the transformer.

Large coil and core material can be improved by 30% in medium setting. Electric motors have less losses at low frequencies, but because of electrical losses and

The extra heat requires a sturdy grip. Today, only a few countries (Peru, Ecuador, Guyana, Philippines and Southern Dynasties

Fresh) using Tesla equipment, frequency 60Hz, voltage 220-240V.

The original voltage in Europe was also 110V, which is the same as today's Japan and the United States. Later, they thought that the copper wire diameter would increase with the same diameter.

Adding voltage can reduce power loss. At that time, the United States wanted to change, but because of the cost of replacing all electrical products, they decided to

Definitely don't do that. And in the 50s-60s, the average American household has refrigerators, washing machines, and other products, but Europe does not.

The final result is that it seems that the United States has not evolved since the 50s and 60s, and is still dealing with some problems, such as when the transformer

When the device is very close (too high voltage), the bulb will burn out quickly, or vice versa: the line terminal voltage is not enough (127V to the end

Only 105V!).

Note that all new US buildings now split 230V between neutral and live to 115V each. Larger products,

For example, the oven, connect to the 230V power supply. For Americans with European equipment, connect the product to another outlet.

214 countries are listed below.

175 countries are using 220-240V(50 or 60Hz).

39 other countries use 100-127V.

Country VOLTA Voltage FREQU Frequency

Afghanistan 220 V 50 Hz

Albania 230 V 50 Hz

Algeria 230 V 50 Hz

American Samoa 120 V 60 Hz

Andorra 230 V 50 Hz

Angola 220 V 50 Hz

Anguilla 110 V 60Hz

Antigua 230 V 60 Hz

Argentina 220 V 50 Hz

Armenia 230 V 50 Hz

Aruba 127 V 60 Hz

Australia 230 V 50 Hz

Austria 230 V 50 Hz

Azerbaijan 220 V 50 Hz

Azores 230 V 50 Hz

Bahamas 120 V 60 Hz

Bahrain 230 V 50 Hz

Balearic Islands 230 V 50 Hz

Bangladesh 220 V 50 Hz

Barbados 115 V 50 Hz

Bellao 230 V 50 Hz

Belgium 230 V 50 Hz

Belize City 110/220 V 60 Hz

Benin 220 V 50 Hz

Bermuda 120 V 60 Hz

Bhutan 230 V 50 Hz

Bolivia 230 V 50 Hz

Bosnia 230 V 50 Hz

Botswana 230 V 50 Hz

Brazil 110/220 V* 60 Hz

Brunei 240 V 50 Hz

Bulgaria 230 V 50 Hz

Burkina Faso 220 V 50 Hz

Burundi 220 V 50 Hz

Cambodia 230 V 50 Hz

Cameroon 220 V 50 Hz

Canada 120 V 60 Hz

Canary Islands 230 V 50 Hz

Cape Verde 230 V 50 Hz

Central and South American Islands 120 V 60 Hz

Central African Republic 220 V 50 Hz

Lake Chad 220 V 50Hz

channel islands

(Native to Guernsey & Jersey, English Channel) 230 V 50 Hz

Chile 220 V 50 Hz

People's Republic of China 220 V 50 Hz

Columbia 110 V 60Hz

Comoros 220 V 50 Hz

People's Republic of Congo 230 V 50 Hz

Democratic Republic of Congo (formerly Zaire) 220 V 50 Hz

Cook Islands 240 V 50 Hz

Costa Rica 120 V 60 Hz

Ivory Coast 220 V 50 Hz

Croatia 230 V 50Hz

Cuba 110/220 V 60Hz

Cyprus 230 V 50 Hz

Czechoslovak Republic 230 V 50 Hz

Denmark 230 V 50 Hz

Djibouti 220 V 50 Hz

Dominica 230 V 50 Hz

Dominican Republic 110 V 60 Hz

East Timor 220 V 50 Hz

Ecuador 127 V 60 Hz

Egypt 220 V 50 Hz

El Salvador 115 V 60 Hz

Equatorial Guinea 220 V 50 Hz

Eritrea 230 V 50 Hz

Estonia 230 V 50 Hz

Ethiopia 220 V 50 Hz

Faroe Islands 230 V 50 Hz

Falkland Islands 240 V 50 Hz

Fiji 240 V 50 Hz

Finland 230 V 50 Hz

France 230 V 50 Hz

French Guyana 220 V 50 Hz

Gaza 230 V 50 Hz

Gabon 220 V 50 Hz

Gambia 230 V 50 Hz

Germany 230 V 50 Hz

Ghana 230 V 50 Hz

Gibraltar 230 V 50 Hz

Greece 230 V 50 Hz

Greenland 230 V 50 Hz

Grenada (Windward Island) 230 V 50 Hz

Guadeloupe 230 V 50 Hz

Guam 110 V 60Hz

Guatemala 120 V 60 Hz

Guinea 220 V 50 Hz

Guinea-Bissau 220 V 50 Hz

Guyana 240 V 60 Hz

Haiti 110 V 60 Hz

Honduras 110 V 60 Hz

Hong Kong SAR, China 220 V 50 Hz

Hungary 230 V 50 Hz

Iceland 230 V 50 Hz

India 240 V 50 Hz

Indonesia 230 V 50 Hz

Iran 230 V 50 Hz

Iraq 230 V 50 Hz

Ireland 230 V 50 Hz

Isle of Wight 230 V 50 Hz

Israel 230 V 50 Hz

Italy 230 V 50 Hz

Jamaica 110 V 50 Hz

Japan 100 V 50/60 Hz**

Jordan 230 V 50 Hz

Kenya 240 V 50 Hz

Kazakh 220 V 50 Hz

Kiribati 240 V 50 Hz

South Korea 220 V 60 Hz

Kuwait 240 V 50 Hz

Republic of the Cayman Islands 220 V 50 Hz

Laos 230 V 50 Hz

Latvia 230 V 50 Hz

Lebanon 230 V 50 Hz

Lesotho 220 V 50 Hz

Liberia 120 V 60 Hz

Libya 127/230 V 50 Hz

Lithuania 230 V 50 Hz

Liechtenstein 230 V 50 Hz

Principality of Luxembourg 230 V 50 Hz

Macau 220 V 50 Hz

Macedonia 230 V 50 Hz

Madagascar 127/220 V 50 Hz

Madeira 230 V 50 Hz

Malawi 230 V 50 Hz

Malaysia 240 V 50 Hz

Maldives (Islands) 230 V 50 Hz

Mali 220 V 50 Hz

Malta 230 V 50 Hz

Martinique 220 V 50 Hz

Mauritania 220 V 50 Hz

Mauritius 230 V 50 Hz

Mexico 127 V 60 Hz

Micronesia UN 120 V 60 Hz

Moldova 230 V 50 Hz

Monaco 230 V 50 Hz

Mongolia 230 V 50 Hz

Montserrat (wind down island) 230 V 60 Hz

Morocco 220 V 50 Hz

Mozambique 220 V 50 Hz

Myanmar (formerly Myanmar) 230 V 50 Hz

Namibia 220 V 50 Hz

Nauru 240 V 50 Hz

Nepal 230 V 50 Hz

Netherlands 230 V 50 Hz

Netherlands Antilles 127/220 V 50 Hz

New Scotland 220 V 50 Hz

New Zealand Island 230 V 50 Hz

Nicaragua 120 V 60 Hz

Niger 220 V 50 Hz

Nigeria 240 V 50 Hz

Norway 230 V 50 Hz

Okinawa 100 V 60 Hz

Oman 240 V 50 Hz

Pakistan 230 V 50 Hz

Fanleaf Coral Island 120 V 60Hz

Panama 110 V 60 Hz

Papua New Guinea 240 V 50 Hz

Paraguay 220 V 50 Hz

Peru 220 V 60 Hz

Philippines 220 V 60 Hz

Poland 230 V 50 Hz

Portugal 230 V 50 Hz

Puerto Rico 120 V 60 Hz

Qatar 240 V 50 Hz

Réunion Island 230 V 50 Hz

Romania 230 V 50 Hz

Russian Union 230 V 50 Hz

Rwanda 230 V 50 Hz

St. Kitts and Nevis (Leewind) 230 V 60 Hz

St. Lucia (windward island) 240 V 50 Hz

St. Vincent (windward island) 230 V 50 Hz

Saudi Arabia 127/220 V 60 Hz

Senegal 230 V 50 Hz

Southwest Serbia 230 V 50 Hz

Seychelles 240 V 50 Hz

Sierra Leone 230 V 50 Hz

Singapore 230 V 50 Hz

Slovakia 230 V 50 Hz

Slovenia 230 V 50 Hz

Somalia 220 V 50 Hz

South Africa 230 V 50 Hz

Spain 230 V 50 Hz

Sri Lanka 230 V 50 Hz

Sudan 230 V 50 Hz

Suriname 127 V 60 Hz

Swaziland 230 V 50 Hz

Sweden 230 V 50 Hz

Switzerland 230 V 50 Hz

Syrian Republic 220 V 50 Hz

Tahiti 110/220 V 60 Hz

Tajikistan 220 V 50 Hz

Taiwan 110 V 60 Hz

Tanzania 230 V 50 Hz

Thailand 220 V 50 Hz

Togo 220 V 50