Have you ever imagined how much adversity is there in electricity around the world? All countries follow some electrical standards and their electrical equipments are designed as per their electrical standards. It is why we should know about the electricity around the world.

Almost all electrical equipments are designed to work with minor voltage deviation depending on various aspects like demand and availability. There are many countries who are still using 220/110/127 Volt. However, they are now converting to 230 volt standard of EU. Normally, such disparity in the rated voltage is irrelevant because almost all the electrical equipments are designed to endure minor deviation of the rated voltage. Yet, it should be noted that so many deviations of voltage/current may harm components of the system.

The below mentioned table indicates the electricity standards adopted by most countries. This information is useful for travellers as well as my fellow electrical engineers. While this would be relevant for those moving to another country, it will be wise to keep their clothes dryers, air conditioners and arc welders at home. The voltages and frequencies mentioned here are approx values as reported to be used as residential as well as commercial supply. All of the electrical systems quoted in this article are considered to be using alternating current (AC).

Electrical supplies

Frequency has been displayed in Hz. Frequency is also important as even if voltage is kept constant, a 60 Hz equipment may not operate as desired on a frequency of 50 Hz.

Afghanistan220 V50 Hz
Albania220 V50 Hz
Algeria230 V50 Hz
American Samoa120 V60 Hz
Andorra230 V50 Hz
Angola220 V50 Hz
Anguilla110 V60 Hz
Antigua230 V60 Hz
Argentina220 V50 Hz
Armenia220 V50 Hz
Aruba127 V60 Hz
Australia240 V50 Hz
Austria230 V50 Hz
Azerbaijan220 V50 Hz
Azores220 V50 Hz
Bahamas120 V60 Hz
Bahrain230 V50 Hz
Balearic Islands220 V50 Hz
Bangladesh220 V50 Hz
Barbados115V50 Hz
Belarus220 V50 Hz
Belgium230 V50 Hz
Belize110/220 V60 Hz
Benin220 V50 Hz
Bermuda120 V60 Hz
Bhutan230 V50 Hz
Bolivia220/230 V50 Hz
Bosnia220 V50 Hz
Botswana231V50 Hz
Brazil110/220 V60 Hz
Brunei240 V50 Hz
Bulgaria230 V50 Hz
Burkina Faso220 V50 Hz
Burundi220 V50 Hz
Cambodia230 V50 Hz
Cameroon220 V50 Hz
Canada120 V60 Hz
Canary Islands220 V50 Hz
Cape Verde220 V50 Hz
Cayman Islands120 V60 Hz
Central African Republic220 V50 Hz
Chad220 V50 Hz
Channel Islands230 V50 Hz
Chile220 V50 Hz
China, People’s Republic of220 V50 Hz
Colombia110 V60 Hz
Comoros220 V50 Hz
Congo, People’s Rep.230 V50 Hz
Congo, Dem. Rep. of (former Zaire)220 V50 Hz
Cook Islands240 V50 Hz
Costa Rica120 V60 Hz
Côte d’Ivoire
(Ivory Coast)
220 V50 Hz
Croatia230 V50 Hz
Cuba110/220 V60 Hz
Cyprus240 V50 Hz
Czech Republic230 V50 Hz
Denmark230 V50 Hz
Djibouti220 V50 Hz
Dominica230 V50 Hz
Dominican Republic110 V60 Hz
East Timor220 V50 Hz
Ecuador120-127 V60 Hz
Egypt220 V50 Hz
El Salvador115V60 Hz
England (See United Kingdom)
Equatorial Guinea220 V50 Hz
Eritrea230 V50 Hz
Estonia230 V50 Hz
Ethiopia220 V50 Hz
Faeroe Islands220 V50 Hz
Falkland Islands240 V50 Hz
Fiji240 V50 Hz
Finland230 V50 Hz
France230 V50 Hz
French Guiana220 V50 Hz
Gaza230 V50 Hz
Gabon220 V50 Hz
Gambia230 V50 Hz
Georgia220 V50 Hz
Germany230 V50 Hz
Ghana230 V50 Hz
Gibraltar240 V50 Hz
Great Britain (See United Kingdom)
Greece220 V50 Hz
Greenland220 V50 Hz
Grenada (Windward Is.)230 V50 Hz
Guadeloupe230 V50 Hz
Guam110 V60 Hz
Guatemala120 V60 Hz
Guinea220 V50 Hz
Guinea-Bissau220 V50 Hz
Guyana240 V60 Hz
Haiti110 V60 Hz
Honduras110 V60 Hz
Hong Kong220 V50 Hz
Hungary230 V50 Hz
Iceland220 V50 Hz
India230 V50 Hz
Indonesia127/230 V50 Hz
Iran230 V50 Hz
Iraq230 V50 Hz
Ireland (Eire)23050 Hz
Isle of Man240 V50 Hz
Israel220 V50 Hz
Italy230 V50 Hz
Ivory Coast (See Côte d’Ivoire)
Jamaica110 V50 Hz
Japan100 V50/60 Hz
Jordan230 V50 Hz
Kenya240 V50 Hz
Kazakhstan220 V50 Hz
Kiribati240 V50 Hz
Korea, South220 V60 Hz
Kuwait240 V50 Hz
Laos230 V50 Hz
Latvia220 V50 Hz
Lebanon110/220 V50 Hz
Lesotho220 V50 Hz
Liberia120 V60 Hz
Libya127 V50 Hz
Lithuania220 V50 Hz
Liechtenstein230 V50 Hz
Luxembourg220 V50 Hz
Macau220 V50 Hz
Macedonia220 V50 Hz
Madagascar220 V50 Hz
Madeira220 V50 Hz
Malawi230 V50 Hz
Malaysia240 V50 Hz
Maldives230 V50 Hz
Mali220 V50 Hz
Malta240 V50 Hz
Martinique220 V50 Hz
Mauritania220 V50 Hz
Mauritius230 V50 Hz
Mexico127 V60 Hz
Micronesia (Federal States of)120 V60 Hz
Monaco127/220 V50 Hz
Mongolia220 V 50 Hz
Montenegro220 V50 Hz
Montserrat (Leeward Is.)230 V60 Hz
Morocco127/220 V50 Hz
Mozambique220 V50 Hz
Myanmar (formerly Burma)230 V50 Hz
Namibia220 V50 Hz
Nauru240 V50 Hz
Nepal230 V50 Hz
Netherlands230 V50 Hz
Netherlands Antilles127/220 V50 Hz
New Caledonia220 V50 Hz
New Zealand230 V50 Hz
Nicaragua120 V60 Hz
Niger220 V50 Hz
Nigeria240 V50 Hz
Northern Ireland (see United Kingdom)
Norway230 V50 Hz
Okinawa100 V60 Hz
Oman240 V50 Hz
Pakistan220 V50 Hz
Palmyra Atoll120 V60 Hz
Panama110 V60 Hz
Papua New Guinea240 V50 Hz
Paraguay220 V50 Hz
Peru220 V60 Hz
Philippines220 V60 Hz
Poland230 V50 Hz
Portugal230 V50 Hz
Puerto Rico120 V60 Hz
Qatar240 V50 Hz
Réunion Island220 V50 Hz
Romania230 V50 Hz
Russia220 V50 Hz
Rwanda230 V50 Hz
St. Kitts and Nevis (Leeward Is.)230 V60 Hz
St. Lucia (Windward Is.)240 V50 Hz
St. Vincent (Windward Is.)230 V50 Hz
Samoa230 V50 Hz
Saudi Arabia127/220 V60 Hz
Scotland (See United Kingdom)
Senegal230 V50 Hz
Serbia220 V50 Hz
Seychelles240 V50 Hz
Sierra Leone230 V50 Hz
Singapore230 V50 Hz
Slovak Republic230 V50 Hz
Slovenia220 V50 Hz
Somalia220 V50 Hz
South Africa220/230 V50 Hz
Spain230 V50 Hz
Sri Lanka230 V50 Hz
Sudan230 V50 Hz
Suriname127 V60 Hz
Swaziland230 V50 Hz
Sweden230 V50 Hz
Switzerland230 V50 Hz
Syria220 V50 Hz
Tahiti220 V60 Hz
Tajikistan220 V50 Hz
Taiwan110 V60 Hz
Tanzania230 V50 Hz
Thailand220 V50 Hz
Togo220 V50 Hz
Tonga240 V50 Hz
Trinidad & Tobago115V60 Hz
Tunisia230 V50 Hz
Turkey230 V50 Hz
Turkmenistan220 V50 Hz
Uganda240 V50 Hz
Ukraine220 V50 Hz
United Arab Emirates220 V50 Hz
United Kingdom230 V50 Hz
United States of America120 V60 Hz
Uruguay220 V50 Hz
Uzbekistan220 V50 Hz
Vanuatu230 V50 Hz
Venezuela120 V60 Hz
Vietnam127/220 V50 Hz
Virgin Islands (British and U.S.)115V60 Hz
Wales (See United Kingdom)
Yemen, Rep. of220/230 V50 Hz
Zambia230 V50 Hz
Zimbabwe220 V50 Hz