Countries around the world operate with different voltages and electric power frequency commonly know as Hertz after Heinrich Hertz, who worked from 1889 until his early death in 1894 as a professor at the University of Bonn. Before coming to Bonn, Hertz had already demonstrated the existence of electromagnetic waves experimentally and therewith proved the “Maxwell equations” of electromagnetic theory.
These equations, unchanged to this day, are known as the basics of the description of all electrical and magnetical phenomena.
One fundamental parameter of waves is their frequency, the number of oscillations per second. Honoring Heinrich Hertz, this unit is named after him (1 Hertz = 1 cycle per second).
Here is a list for your convenience listing the most used electrical power systems.
COUNTRY VOLTAGE FREQUENCY(HERTZ)
Afghanistan 220 V 50 Hz
Albania 220 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 60 Hz
Antigua 230 V* 60 Hz
Argentina 220 V 50 Hz
Armenia 220 V 50 Hz
Aruba 127 V* 60 Hz
Australia 240 V 50 Hz
Austria 230 V 50 Hz
Azerbaijan 220 V 50 Hz
Azores 220 V* 50 Hz
Bahamas 120 V 60 Hz
Bahrain 230 V* 50 Hz*
Balearic Islands 220 V 50 Hz
Bangladesh 220 V 50 Hz
Barbados 115V 50 Hz
Belarus 220 V 50 Hz
Belgium 230 V 50 Hz
Belize 110/220 V 60 Hz
Benin 220 V 50 Hz
Bermuda 120 V 60 Hz
Bhutan 230 V 50 Hz
Bolivia 220/230 V* 50 Hz
Bosnia 220 V 50 Hz
Botswana 231V 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 220 V 50 Hz
Cape Verde 220 V 50 Hz
Cayman Islands 120 V 60 Hz
Central African Republic 220 V 50 Hz
Chad 220 V 50 Hz
Channel Islands 230 V 50 Hz
Chile 220 V 50 Hz
China, People’s Republic of 220 V 50 Hz
Colombia 110 V 60 Hz
Comoros 220 V 50 Hz
Congo, People’s Rep. of 230 V 50 Hz
Congo, Dem. Rep. of (former Zaire) 220 V 50 Hz
Cook Islands 240 V 50 Hz
Costa Rica 120 V 60 Hz
Côte d’Ivoire 220 V 50 Hz
(Ivory Coast)
Croatia 230 V 50 Hz
Cuba 110/220 V 60 Hz
Cyprus 240 V 50 Hz
Czech 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 120-127 V 60 Hz
Egypt 220 V 50 Hz
El Salvador 115V 60 Hz
England (See United Kingdom)
Equatorial Guinea 220 V* 50 Hz
Eritrea 230 V 50 Hz
Estonia 230 V 50 Hz
Ethiopia 220 V 50 Hz
Faeroe Islands 220 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 Guiana 220 V 50 Hz
Gaza 230 V 50 Hz
Gabon 220 V 50 Hz
Gambia 230 V 50 Hz
Georgia 220 V 50 Hz
Germany 230 V 50 Hz
Ghana 230 V 50 Hz
Gibraltar 240 V 50 Hz
Great Britain (See United Kingdom)
Greece 220 V 50 Hz
Greenland 220 V 50 Hz
Grenada (Windward Is.) 230 V 50 Hz
Guadeloupe 230 V 50 Hz
Guam 110 V 60 Hz
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 220 V* 50 Hz
Hungary 230 V 50 Hz
Iceland 220 V 50 Hz
India 230 V 50 Hz
Indonesia 127/230 V* 50 Hz
Iran 230 V 50 Hz
Iraq 230 V 50 Hz
Ireland (Eire) 230 50 Hz
Isle of Man 240 V 50 Hz
Israel 220 V 50 Hz
Italy 230 V 50 Hz
Ivory Coast (See Côte d’Ivoire)
Jamaica 110 V 50 Hz
Japan 100 V 50/60 Hz*
Jordan 230 V 50 Hz
Kenya 240 V 50 Hz
Kazakhstan 220 V 50 Hz
Kiribati 240 V 50 Hz
Korea, South 220 V 60 Hz
Korea, North 220V 50Hz
Kuwait 240 V 50 Hz
Laos 230 V 50 Hz
Latvia 220 V 50 Hz
Lebanon 110/220 V 50 Hz
Lesotho 220 V 50 Hz
Liberia 120 V 60 Hz
Libya 127 V* 50 Hz
Lithuania 220 V 50 Hz
Liechtenstein 230 V 50 Hz
Luxembourg 220 V 50 Hz
Macau 220 V 50 Hz
Macedonia 220 V 50 Hz
Madagascar 220 V 50 Hz
Madeira 220 V 50 Hz
Malawi 230 V 50 Hz
Malaysia 240 V 50 Hz
Maldives 230 V 50 Hz
Mali 220 V 50 Hz
Malta 240 V 50 Hz
Martinique 220 V 50 Hz
Mauritania 220 V 50 Hz
Mauritius 230 V 50 Hz
Mexico 127 V 60 Hz
Micronesia (Federal States of) 120 V 60 Hz
Monaco 127/220 V 50 Hz
Mongolia 220 V 50 Hz
Montenegro 220 V 50 Hz
Montserrat (Leeward Is.) 230 V 60 Hz
Morocco 127/220 V* 50 Hz
Mozambique 220 V 50 Hz
Myanmar (formerly Burma) 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 Caledonia 220 V 50 Hz
New Zealand 230 V 50 Hz
Nicaragua 120 V 60 Hz
Niger 220 V 50 Hz
Nigeria 240 V 50 Hz
Northern Ireland (see United Kingdom)
Norway 230 V 50 Hz
Okinawa 100 V* 60 Hz
Oman 240 V* 50 Hz
Pakistan 220 V 50 Hz
Palmyra Atoll 120 V 60 Hz
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 220 V 50 Hz
Romania 230 V 50 Hz
Russia 220 V 50 Hz
Rwanda 230 V 50 Hz
St. Kitts and Nevis (Leeward Is.) 230 V 60 Hz
St. Lucia (Windward Is.) 240 V 50 Hz
St. Vincent (Windward Is.) 230 V 50 Hz
Samoa 230 V 50 Hz
Saudi Arabia 127/220 V 60 Hz
Scotland (See United Kingdom)
Senegal 230 V 50 Hz
Serbia 220 V 50 Hz
Seychelles 240 V 50 Hz
Sierra Leone 230 V 50 Hz
Singapore 230 V 50 Hz
Slovak Republic 230 V 50 Hz
Slovenia 220 V 50 Hz
Somalia 220 V* 50 Hz
South Africa 220/230 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
Syria 220 V 50 Hz
Tahiti 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 Hz
Tonga 240 V 50 Hz
Trinidad & Tobago 115V 60 Hz
Tunisia 230 V 50 Hz
Turkey 230 V 50 Hz
Turkmenistan 220 V 50 Hz
Uganda 240 V 50 Hz
Ukraine 220 V 50 Hz
United Arab Emirates 220 V* 50 Hz
United Kingdom 230 V* 50 Hz
United States of America 120 V 60 Hz
Uruguay 220 V 50 Hz
Uzbekistan 220 V 50 Hz
Vanuatu 230 V 50 Hz
Venezuela 120 V 60 Hz
Vietnam 127/220 V* 50 Hz
Virgin Islands (British and U.S.) 115V 60 Hz
Wales (See United Kingdom)
Yemen, Rep. of 220/230 V 50 Hz
Zambia 230 V 50 Hz
Zimbabwe 220 V 50 Hz
*Voltage variations are common
