# Three-phase electric power (industrial applications only) Although single-phase power is more prevalent today, three-phase is still chosen as the power of choice for many different types of applications. Generators at power stations supply three-phase electricity. This is a way of supplying three times as much electricity along three wires as can be supplied through two, without having to increase the thickness of the wires. It is usually used in industry to drive motors and other devices. ![A three-phase electric motor](https://2999784448-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MBlD-pGvqUEQDs9SdgH%2F-MBpyxYf5ERi_6X3o0nL%2F-MBpz7jHx3DB3Cr8ZN8Z%2Fimage.png?alt=media\&token=11398d6c-a94c-4b8d-9ff5-47cbb989127e) Three-phase electricity is by its very nature a much smoother form of electricity than single-phase or two-phase power. It is this more consistent electrical power that allows machines to run more efficiently and last many years longer than their relative machines running on the other phases. Some applications are able to work with three-phase power in ways that would not work on single phase at all. Mind you, since three-phase electricity is rarely used for domestic purposes, the table below is only relevant to electricians, electrical engineers and other technically skilled people. Travellers and laymen should take a look at the [single-phase voltage table](https://docs.ifreeq.com/general-knowledge/electricity/plug-socket-and-voltage-by-country). | Country | Three-phase voltage (volts) | Frequency (hertz) | Number of wires (not including the ground wire) | | ----------------------------------------------------------------------------------- | ------------------------------------------------- | ----------------- | ----------------------------------------------- | | Abu Dhabi (not a country, but a state (an emirate) within the United Arab Emirates) | 400 V | 50 Hz | 3, 4 | | Afghanistan | 380 V | 50 Hz | 4 | | Albania | 400 V | 50 Hz | 4 | | Algeria | 400 V | 50 Hz | 4 | | American Samoa | 208 V | 60 Hz | 3, 4 | | Andorra | 400 V | 50 Hz | 3, 4 | | Angola | 380 V | 50 Hz | 4 | | Anguilla | 120/208 V / 127/220 V / 240/415 V | 60 Hz | 3, 4 | | Antigua and Barbuda | 400 V | 60 Hz | 3, 4 | | Argentina | 380 V | 50 Hz | 3, 4 | | Armenia | 400 V | 50 Hz | 4 | | Aruba | 220 V | 60 Hz | 3, 4 | | Australia | 400 V (officially, but in practice often 415 V) | 50 Hz | 3, 4 | | Austria | 400 V | 50 Hz | 3, 4 | | Azerbaijan | 380 V | 50 Hz | 4 | | Azores | 400 V | 50 Hz | 3, 4 | | Bahamas | 208 V | 60 Hz | 3, 4 | | Bahrain | 400 V | 50 Hz | 3, 4 | | Balearic Islands | 400 V | 50 Hz | 3, 4 | | Bangladesh | 400 V | 50 Hz | 3, 4 | | Barbados | 200 V | 50 Hz | 3, 4 | | Belarus | 380 V | 50 Hz | 4 | | Belgium | 400 V | 50 Hz | 3, 4 | | Belize | 190 V / 380 V | 60 Hz | 3, 4 | | Benin | 380 V | 50 Hz | 4 | | Bermuda | 208 V | 60 Hz | 3, 4 | | Bhutan | 400 V | 50 Hz | 4 | | Bolivia | 400 V | 50 Hz | 4 | | Bonaire | 220 V | 50 Hz | 3, 4 | | Bosnia & Herzegovina | 400 V | 50 Hz | 4 | | Botswana | 400 V | 50 Hz | 4 | | Brazil | 220/380 V | 60 Hz | 3, 4 | | British Virgin Islands | 190 V | 60 Hz | 3, 4 | | Brunei | 415 V | 50 Hz | 4 | | Bulgaria | 400 V | 50 Hz | 4 | | Burkina Faso | 380 V | 50 Hz | 4 | | Burma *(officially Myanmar)* | 400 V | 50 Hz | 4 | | Burundi | 380 V | 50 Hz | 4 | | Cambodia | 400 V | 50 Hz | 4 | | Cameroon | 380 V | 50 Hz | 4 | | Canada | 120/208 V / 240 V / 480 V / 347/600 V | 60 Hz | 3, 4 | | Canary Islands | 400 V | 50 Hz | 3, 4 | | Cape Verde *(in Portuguese: Cabo Verde)* | 400 V | 50 Hz | 3, 4 | | Cayman Islands | 240 V | 60 Hz | 3 | | Central African Republic | 380 V | 50 Hz | 4 | | Chad | 380 V | 50 Hz | 4 | | Channel Islands (Guernsey & Jersey) | 400 V | 50 Hz | 4 | | Chile | 380 V | 50 Hz | 3, 4 | | China, People’s Republic of | 380 V | 50 Hz | 3, 4 | | Colombia | 220 V / 440 V | 60 Hz | 3, 4 | | Comoros | 380 V | 50 Hz | 4 | | Congo, Democratic Republic of the (Congo-Kinshasa) | 380 V | 50 Hz | 3, 4 | | Congo, Republic of the (Congo-Brazzaville) | 400 V | 50 Hz | 3, 4 | | Cook Islands | 415 V | 50 Hz | 3, 4 | | Costa Rica | 240 V | 60 Hz | 3, 4 | | Croatia | 400 V | 50 Hz | 4 | | Cuba | 190 V / 440 V | 60 Hz | 3 | | Curaçao | 220 V / 380 V | 50 Hz | 3, 4 | | Cyprus | 400 V | 50 Hz | 4 | | Czechia (Czech Republic) | 400 V | 50 Hz | 3, 4 | | Côte d’Ivoire (Ivory Coast) | 380 V | 50 Hz | 3, 4 | | Denmark | 400 V | 50 Hz | 3, 4 | | Djibouti | 380 V | 50 Hz | 4 | | Dominica | 400 V | 50 Hz | 4 | | Dominican Republic | 120/208 V / 277/480 V | 60 Hz | 3, 4 | | Dubai (not a country, but a state (an emirate) within the United Arab Emirates) | 400 V | 50 Hz | 3, 4 | | East Timor (Timor-Leste) | 380 V | 50 Hz | 4 | | Ecuador | 208 V | 60 Hz | 3, 4 | | Egypt | 380 V | 50 Hz | 3, 4 | | El Salvador | 200 V | 60 Hz | 3 | | England | 400 V | 50 Hz | 4 | | Equatorial Guinea | \[unavailable] | \[unavailable] | \[unavailable] | | Eritrea | 400 V | 50 Hz | 4 | | Estonia | 400 V | 50 Hz | 4 | | Ethiopia | 380 V | 50 Hz | 4 | | Faeroe Islands | 400 V | 50 Hz | 3, 4 | | Falkland Islands | 415 V | 50 Hz | 4 | | Fiji | 415 V | 50 Hz | 3, 4 | | Finland | 400 V | 50 Hz | 3, 4 | | France | 400 V | 50 Hz | 4 | | French Guiana | 380 V | 50 Hz | 3, 4 | | Gabon (Gabonese Republic) | 380 V | 50 Hz | 4 | | Gambia | 400 V | 50 Hz | 4 | | Gaza | 400 V | 50 Hz | 4 | | Georgia | 380 V | 50 Hz | 4 | | Germany | 400 V | 50 Hz | 4 | | Ghana | 400 V | 50 Hz | 3, 4 | | Gibraltar | 400 V | 50 Hz | 4 | | Great Britain (GB) | 400 V | 50 Hz | 4 | | Greece | 400 V | 50 Hz | 4 | | Greenland | 400 V | 50 Hz | 3, 4 | | Grenada | 400 V | 50 Hz | 4 | | Guadeloupe | 400 V | 50 Hz | 3, 4 | | Guam | 190 V | 60 Hz | 3, 4 | | Guatemala | 208 V | 60 Hz | 3, 4 | | Guinea | 380 V | 50 Hz | 3, 4 | | Guinea-Bissau | 380 V | 50 Hz | 3, 4 | | Guyana | 190 V | 60 Hz | 3, 4 | | Haiti | 190 V | 60 Hz | 3, 4 | | Holland *(officially the Netherlands)* | 400 V | 50 Hz | 3, 4 | | Honduras | 208 V / 230 V / 240 V / 460 V / 480 V | 60 Hz | 3, 4 | | Hong Kong | 380 V | 50 Hz | 3, 4 | | Hungary | 400 V | 50 Hz | 3, 4 | | Iceland | 400 V | 50 Hz | 3, 4 | | India | 400 V | 50 Hz | 4 | | Indonesia | 400 V | 50 Hz | 4 | | Iran | 400 V | 50 Hz | 3, 4 | | Iraq | 400 V | 50 Hz | 4 | | Ireland, Northern | 400 V | 50 Hz | 4 | | Ireland, Republic of (Eire) | 400 V | 50 Hz | 4 | | Isle of Man | 400 V | 50 Hz | 4 | | Israel | 400 V | 50 Hz | 4 | | Italy | 400 V | 50 Hz | 4 | | Jamaica | 190 V | 50 Hz | 3, 4 | | Japan | 200 V | 50 Hz / 60 Hz | 3 | | Jordan | 400 V | 50 Hz | 3, 4 | | Kazakhstan | 380 V | 50 Hz | 3, 4 | | Kenya | 415 V | 50 Hz | 4 | | Kiribati | \[unavailable] | \[unavailable] | \[unavailable] | | Korea, North | 380 V | 50 Hz | 3, 4 | | Korea, South | 380 V | 60 Hz | 4 | | Kosovo | 230 V / 400 V | 50 Hz | 3 | | Kuwait | 415 V | 50 Hz | 4 | | Kyrgyzstan | 380 V | 50 Hz | 3, 4 | | Laos | 400 V | 50 Hz | 4 | | Latvia | 400 V | 50 Hz | 4 | | Lebanon | 400 V | 50 Hz | 4 | | Lesotho | 380 V | 50 Hz | 4 | | Liberia | 208 V | 60 Hz | 3, 4 | | Libya | 400 V | 50 Hz | 4 | | Liechtenstein | 400 V | 50 Hz | 4 | | Lithuania | 400 V | 50 Hz | 4 | | Luxembourg | 400 V | 50 Hz | 4 | | Macau | 380 V | 50 Hz | 3 | | Macedonia, North | 400 V | 50 Hz | 4 | | Madagascar | 380 V | 50 Hz | 3, 4 | | Madeira | 400 V | 50 Hz | 3, 4 | | Malawi | 400 V | 50 Hz | 3, 4 | | Malaysia | 415 V | 50 Hz | 4 | | Maldives | 400 V | 50 Hz | 4 | | Mali | 380 V | 50 Hz | 3, 4 | | Malta | 400 V | 50 Hz | 4 | | Marshall Islands | \[unavailable] | \[unavailable] | \[unavailable] | | Martinique | 380 V | 50 Hz | 3, 4 | | Mauritania | 380 V | 50 Hz | 3, 4 | | Mauritius | 400 V | 50 Hz | 4 | | Mayotte | \[unavailable] | \[unavailable] | \[unavailable] | | Mexico | 220 V / 480 V | 60 Hz | 3, 4 | | Micronesia, Federated States of | \[unavailable] | \[unavailable] | \[unavailable] | | Moldova | 400 V | 50 Hz | 4 | | Monaco | 400 V | 50 Hz | 4 | | Mongolia | 400 V | 50 Hz | 4 | | Montenegro | 400 V | 50 Hz | 3, 4 | | Montserrat | 400 V | 60 Hz | 4 | | Morocco | 380 V | 50 Hz | 4 | | Mozambique | 380 V | 50 Hz | 4 | | Myanmar *(formerly Burma)* | 400 V | 50 Hz | 4 | | Namibia | 380 V | 50 Hz | 4 | | Nauru | 415 V | 50 Hz | 4 | | Nepal | 400 V | 50 Hz | 4 | | Netherlands | 400 V | 50 Hz | 3, 4 | | New Caledonia | 380 V | 50 Hz | 3, 4 | | New Zealand | 400 V | 50 Hz | 3, 4 | | Nicaragua | 208 V | 60 Hz | 3, 4 | | Niger | 380 V | 50 Hz | 4 | | Nigeria | 415 V | 50 Hz | 4 | | North Korea | 380 V | 50 Hz | 3, 4 | | North Macedonia | 400 V | 50 Hz | 4 | | Northern Ireland | 400 V | 50 Hz | 4 | | Norway | 230 V / 400 V | 50 Hz | 3, 4 | | Oman | 415 V | 50 Hz | 4 | | Pakistan | 400 V | 50 Hz | 3 | | Palau | 208 V | 60 Hz | 3 | | Panama | 240 V | 60 Hz | 3 | | Papua New Guinea | 415 V | 50 Hz | 4 | | Paraguay | 380 V | 50 Hz | 4 | | Peru | 220 V | 60 Hz | 3 | | Philippines | 380 V | 60 Hz | 3 | | Pitcairn Islands | \[unavailable] | \[unavailable] | \[unavailable] | | Poland | 400 V | 50 Hz | 4 | | Portugal | 400 V | 50 Hz | 3, 4 | | Puerto Rico | 480 V | 60 Hz | 3, 4 | | Qatar | 415 V | 50 Hz | 3, 4 | | Romania | 400 V | 50 Hz | 4 | | Russia *(officially the Russian Federation)* | 380 V | 50 Hz | 4 | | Rwanda | 400 V | 50 Hz | 4 | | Réunion | 400 V | 50 Hz | 4 | | Saba | \[unavailable] | \[unavailable] | \[unavailable] | | Saint Barthélemy *(informally also referred to as Saint Barth’s or Saint Barts)* | \[unavailable] | \[unavailable] | \[unavailable] | | Saint Helena | \[unavailable] | \[unavailable] | \[unavailable] | | Saint Kitts and Nevis *(officially the Federation of Saint Christopher and Nevis)* | 400 V | 60 Hz | 4 | | Saint Lucia | 400 V | 50 Hz | 4 | | Saint Martin | \[unavailable] | \[unavailable] | \[unavailable] | | Saint Vincent and the Grenadines | 400 V | 50 Hz | 4 | | Samoa | 400 V | 50 Hz | 3, 4 | | San Marino | 400 V | 50 Hz | 4 | | Saudi Arabia | 400 V | 60 Hz | 4 | | Scotland | 400 V | 50 Hz | 4 | | Senegal | 400 V | 50 Hz | 3, 4 | | Serbia | 400 V | 50 Hz | 3, 4 | | Seychelles | 240 V | 50 Hz | 3 | | Sierra Leone | 400 V | 50 Hz | 4 | | Singapore | 400 V | 50 Hz | 4 | | Sint Eustatius | 220 V | 60 Hz | 3, 4 | | Sint Maarten | 220 V | 60 Hz | 3, 4 | | Slovakia | 400 V | 50 Hz | 4 | | Slovenia | 400 V | 50 Hz | 3, 4 | | Solomon Islands | \[unavailable] | \[unavailable] | \[unavailable] | | Somalia | 380 V | 50 Hz | 3, 4 | | Somaliland (unrecognised, self-declared state) | 380 V | 50 Hz | 3, 4 | | South Africa | 400 V | 50 Hz | 3, 4 | | South Korea | 380 V | 60 Hz | 4 | | South Sudan | 400 V | 50 Hz | 4 | | Spain | 400 V | 50 Hz | 3, 4 | | Sri Lanka | 400 V | 50 Hz | 4 | | Sudan | 400 V | 50 Hz | 4 | | Suriname | 220 V / 400 V | 60 Hz | 3, 4 | | Swaziland | 400 V | 50 Hz | 4 | | Sweden | 400 V | 50 Hz | 3, 4 | | Switzerland | 400 V | 50 Hz | 3, 4 | | Syria | 380 V | 50 Hz | 3 | | São Tomé and Príncipe | 400 V | 50 Hz | 3, 4 | | Tahiti | 380 V | 50 Hz / 60 Hz | 3, 4 | | Taiwan | 220 V | 60 Hz | 4 | | Tajikistan | 380 V | 50 Hz | 3 | | Tanzania | 415 V | 50 Hz | 3, 4 | | Thailand | 400 V | 50 Hz | 3, 4 | | Togo | 380 V | 50 Hz | 4 | | Tonga | 415 V | 50 Hz | 3, 4 | | Trinidad & Tobago | 115/230 V / 230/400 V | 60 Hz | 4 | | Tunisia | 400 V | 50 Hz | 4 | | Turkey | 400 V | 50 Hz | 3, 4 | | Turkmenistan | 380 V | 50 Hz | 3 | | Turks and Caicos Islands | 240 V | 60 Hz | 4 | | Uganda | 415 V | 50 Hz | 4 | | Ukraine | 400 V | 50 Hz | 4 | | United Arab Emirates (UAE) | 400 V | 50 Hz | 3, 4 | | United Kingdom (UK) | 400 V | 50 Hz | 4 | | United States of America (USA) | 120/208 V / 277/480 V / 120/240 V / 240 V / 480 V | 60 Hz | 3, 4 | | United States Virgin Islands | 190 V | 60 Hz | 3, 4 | | Uruguay | 380 V | 50 Hz | 3 | | Uzbekistan | 380 V | 50 Hz | 4 | | Vanuatu | 400 V | 50 Hz | 3, 4 | | Venezuela | 120 V | 60 Hz | 3, 4 | | Vietnam | 380 V | 50 Hz | 4 | | Virgin Islands (British) | 190 V | 60 Hz | 3, 4 | | Virgin Islands (USA) | 190 V | 60 Hz | 3, 4 | | Wales | 400 V | 50 Hz | 4 | | West Bank | 400 V | 50 Hz | 4 | | Western Sahara | 380 V | 50 Hz | 4 | | Yemen | 400 V | 50 Hz | 4 | | Zambia | 400 V | 50 Hz | 4 | | Zimbabwe | 415 V | 50 Hz | 3, 4 |