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Mains power systems

This article includes a list of countries and territories, with the plugs, voltages and frequencies they use for providing electrical power to small appliances and some major appliances. For definitions of terms and further information on each plug, see the article AC power plugs and sockets. For a discussion of the different voltages and frequencies used and some of the history of the different power systems see Mains electricity.

Wall sockets

The lettering system used here is from a U.S. government document, which defines the letter names and gives a (not always correct) list of what plug types are used where. Although useful for quick reference, the document is ambiguous in some areas. A plug and socket that are classified here under the same letter will usually mate, but there is no guarantee of this. A more up-to-date and authoritative reference on plugs and sockets is IEC Technical Report 60083.

Voltage ranges

Distinction should be made between the voltage at the point of supply (nominal system voltage) and the voltage rating of the equipment (utilization voltage). Typically the utilization voltage is 3 to 5% lower than the nominal system voltage; for example, a nominal 208 V supply system will be connected to motors with "200 V" on their nameplates. This allows for the voltage drop between equipment and supply. Voltages in this article are the nominal supply voltages and equipment used on these systems will carry slightly lower nameplate voltages.

Table of mains voltages and frequencies

Region Type(s) of plug / socket Voltage Frequency Comments
Afghanistan C, D, F 240 V 50 Hz Voltage may vary from 160 to 280.
Albania C, F 220 V 50 Hz
Algeria C, F 230 V 50 Hz
American Samoa A, B, F, I 120 V 60 Hz
Andorra C, F 220 V 50 Hz
Angola C 220 V 50 Hz
Anguilla A (maybe B) 110 V 60 Hz
Antigua A, B 230 V 60 Hz Airport power is reportedly 110 V.
Argentina C, I 220 V 50 Hz Live and neutral are reversed for socket outlet type I in comparison to most other countries.
Armenia C, F 220 V 50 Hz
Aruba A, B, F 127 V 60 Hz Lago Colony 115 V.
Australia I 230 V 50 Hz As of 2000, the mains supply voltage specified in AS 60038 is 230 V with a tolerance of +10% -6%. This was done for voltage harmonisation - however 240 V is within tolerance and is commonly found. Mains voltage is still popularly referred to as being "two-forty volts".
Austria C, F 230 V 50 Hz
Azerbaijan C 220 V 50 Hz
Azores C, F 220 V 50 Hz
Bahamas A, B 120 V 60 Hz along with 50 Hz in some outlying areas
Bahrain G 230 V 50 Hz Awali 110 V, 60 Hz.
Balearic Islands C, F 220 V 50 Hz
Bangladesh A, C, D, G, K 220 V 50 Hz
Barbados A, B 115 V 50 Hz
Belarus C 220 V 50 Hz
Belgium C, E 230 V 50 Hz
Belize A, B, G 110 V
and
220 V
60 Hz
Benin C, E 220 V 50 Hz
Bermuda A, B 120 V 60 Hz
Bhutan D, F, G, M 230 V 50 Hz
Bolivia A, C 220 V 50 Hz La Paz & Viacha 115 V.
Bonaire 127 V 50 Hz Receptacle is combination of B&C without ground connector.
Bosnia C, F 220 V 50 Hz
Botswana D, G, M 231 V 50 Hz
Brazil A, B, C, I 127 V
and
220 V
60 Hz Type I is becoming common for 220 V outlets and appliances in 127 V areas. Dual-voltage wiring is rather common for high-powered appliances, such as clothes dryers and electric showers which tend to be 220 V even in 127 V areas. Depending on the area, the exact voltage might be 115 V, 127 V, or 220 V. The A, B and C types are sometimes together (flat with rounder ends and ground pin) so that an A, B or C types can be used. Also note that by 2009, Brazil will be converting to the IEC 60906-1 international plug which looks similar to type J but is not compatible.
Brunei G 240 V 50 Hz
Bulgaria C, F 220 V 50 Hz
Burkina Faso C, E 220 V 50 Hz
Burundi C, E 220 V 50 Hz
Cambodia A, C, G 230 V 50 Hz
Cameroon C, E 220 V 50 Hz
Canada A, B 120 V 60 Hz Standardized at 120 V. 240 V used for applications such as clothes driers, air conditioning, electric cook-stoves and machinery. Buildings with more than one branch circuit must have both voltages. Type A outlets are for repairs only, type B now required for new construction and renovation. A 20-Amp type B but with a T-slot is used in kitchens in new construction.
Canary Islands C, E, L 220 V 50 Hz
Cape Verde C, F 220 V 50 Hz
Cayman Islands A, B 120 V 60 Hz
Central African Republic C, E 220 V 50 Hz
Chad D, E, F 220 V 50 Hz
Channel Islands C, G 230 V 50 Hz
Chile C, L 220 V 50 Hz
China (mainland only) A, C, I 220 V 50 Hz Most wall outlets simultaneously support Types A, I, and C. Some outlets support both Type A and Type C (the holes in the outlets are flat in the middle and round on the sides) so that either a Type A or a Type C plug can be used. The Type I outlet is next to the Type A & C outlet. Type A outlets only fit plugs with pins of the same width -- a polarized Type A plug requires an adapter. NOTE: no matter the type of plug the socket will accept, voltage in china is always 220 volts. See photo at right.
Colombia A, B 120 V 60 Hz High-power air conditioners, restaurant equipment, cookstoves and ovens use 240 volt supplies. Wiring conventions, practices and standards follow the Colombian Electrical Code (Codigo Electrico Colombiano) which is essentially a translation of the USA National Electric Code.
Comoros C, E 220 V 50 Hz
Congo-Brazzaville C, E 230 V 50 Hz
Congo-Kinshasa C, D 220 V 50 Hz
Cook Islands I 240 V 50 Hz
Costa Rica A, B 120 V 60 Hz
Côte d'Ivoire C, E 230 V 50 Hz
Croatia C, F 230 V 50 Hz
Cuba A, B 110 V 60 Hz
Cyprus G 240 V 50 Hz
Czech Republic C, E 230 V 50 Hz
Denmark C, K 230 V 50 Hz Type E is added from July 2008.
Djibouti C, E 220 V 50 Hz
Dominica D, G 230 V 50 Hz
Dominican Republic A, B 110 V 60 Hz
East Timor C, E, F, I 220 V 50 Hz
Ecuador A, B 120 V 60 Hz
Egypt C 220 V 50 Hz
El Salvador A, B 115 V 60 Hz
Equatorial Guinea C, E 220 V 50 Hz
Eritrea C 230 V 50 Hz
Estonia C, F 230 V 50 Hz
Ethiopia C, E, F, L 220 V 50 Hz
Faroe Islands C, K 220 V 50 Hz
Falkland Islands G 240 V 50 Hz
Fiji I 240 V 50 Hz
Finland C, F 230 V 50 Hz
France C, E 230 V (formerly 220v) 50 Hz
French Guiana C, D, E 220 V 50 Hz
Gaza Strip C, H, M 230 V 50 Hz (see Israel in this list)
Gabon C 220 V 50 Hz
Gambia G 230 V 50 Hz
Germany C, F 230 V (formerly 220v) 50 Hz Type F ("Schuko", short for "Schutzkontakt") is standard. Type C Plugs ("Euro-Stecker") are common, especially for low-power devices. Type C wall sockets are very uncommon, and exist only in very old installations.
Ghana D, G 230 V 50 Hz
Gibraltar G, K 240 V 50 Hz Type K was used in the Europort development by the Danish builders. Otherwise the United Kingdom fittings are used.
Greece C, F 230 V (formerly 220v) 50 Hz Type F is the de-facto standard for new installations' sockets. Type C sockets exist only in old installations. Light appliances use type C plug while more electricity-consuming ones use type E&F or F plugs.
Greenland C, K 220 V 50 Hz
Grenada G 230 V 50 Hz
Guadeloupe C, D, E 230 V 50 Hz
Guam A, B 110 V 60 Hz
Guatemala A, B 120 V 60 Hz
Guinea C, F, K 220 V 50 Hz
Guinea-Bissau C 220 V 50 Hz
Guyana A, B, D, G 240 V 60 Hz
Haiti A, B 110 V 60 Hz
Honduras A, B 110 V 60 Hz
Hong Kong G is used in almost all products, while M is (rarely) used when required current rating is between 13~15A. D is now obsolete in Hong Kong. 220 V 50 Hz Largely based on UK system. Occasionally, a 'shaver' socket (similar to Type C) is found in some bathrooms that provides low current to some other plug types. These almost always have a 110 V socket and a 220 V socket in the same unit, or a switch to select voltage, which are sometimes labelled as 110 V and 220 V. This duo installation is not as common in HK as in the UK.
Hungary C, F 230 V (formerly 220V) 50 Hz
Iceland C, F 230 V 50 Hz
India C, D, M 230 V 50 Hz The standardardised voltage used in India is 230V/50 Hz with a tolerance varying from 216V to 253V. Some hotels provide dual receptacles for foreign appliances giving both 120V and 230V.
Indonesia C, F, G 127 V
and
230 V
50 Hz Type G socket/plug is less common.
Iran C, F 220 V 50 Hz Type C wall sockets are less common, and exist only in older installations. Type F is used for new installations. Type C Plugs are common for low-power devices.
Iraq C, D, G 230 V 50 Hz
Ireland G found in all normal installations - Legacy systems (rare/extinct): (D and M (as in the UK); and type F (Schuko) ) 230 V (formerly 220v) 50 Hz G Sockets and plugs standard as defined by NSAI I.S. 401 (Plug) I.S. 411 (Socket outlet). Type F ("Side Earth") plugs occasionally seen in old installations probably because much of the early Irish electrical network was heavily influenced by Siemens. ' A 'shaver' socket (similar to Type C) is sometimes found in bathrooms that will provide low current to some other plug types. These almost always have a 110 V socket and a 230 V socket in the same unit, or a switch to select voltage, which are sometimes labelled as 115 V and 230 V. The G type socket often has a on-off switch on the socket. 110 V centre point earthed transformers are often used for industrial portable tools.
Isle of Man C, G 240 V 50 Hz
Israel C, H, M 230 V 50 Hz Most modern sockets accept both type C and type H plugs. Type M sockets are used for air conditioners. Identical plugs and sockets also used in the Palestinian National Authority areas.
Italy C, F, L 230 V (formerly 220 V) 50 Hz
Jamaica A, B 110 V 50 Hz
Japan A, B 100 V 50 Hz
and
60 Hz
Eastern Japan 50 Hz (Tokyo, Kawasaki, Sapporo, Yokohama, and Sendai); Western Japan 60 Hz (Okinawa, Osaka, Kyoto, Kobe, Nagoya, Hiroshima). Older buildings have nonpolarized sockets, in which case American polarized plugs (one prong wider than the other) would not fit. Many buildings do not have the ground pin. Sockets and switches fit in American-sized standard boxes.
Jordan B, C, D, F, G, J 230 V 50 Hz
Kazakhstan C, E, F 220 V 50 Hz No official standard. Voltage tolerance is 220 V ±10%. Actual voltage may vary (usually 150-200 V) because of unstable electrical system.
Kenya G 240 V 50 Hz
Kiribati I 240 V 50 Hz
Korea, North C 220 V 50 Hz
Korea, South A, B, C, F (Types A & B are used for 110-volt installations and/or found in very old buildings. Types C & F are used for 220 Volts.) 220 V 60 Hz Type F is normally found in offices, airports, hotels and some upscale homes; while Type C (type CEE 7/17) is the norm in most households. 220 volt power is distributed by using both "live" poles of a 110 volt system (neutral is not used). 110 V/60 Hz power with plugs A & B (under Japanese colonial influence) was previously used but has already been phased out. Some residents install their own step-down transformers and dedicated circuits, so that they can use 110 V appliances imported from Japan or North America. Most hotels only have 220 V outlets, but some hotels offer both 110 V (Type A or B) and 220 V (Type C or F) outlets. Switches and outlets fit American-sized boxes.
Kuwait C, G 240 V 50 Hz
Kyrgyzstan C
Laos A, B, C, E, F 230 V 50 Hz
Latvia C, F 220 V 50 Hz
Lebanon A, B, C, D, G 110
and
200 V
50 Hz
Lesotho M 220 V 50 Hz
Liberia A, B, C, E, F 120/240 V 50 Hz Previously 60 Hz, now officially 50 Hz. Many private power plants are still 60 Hz A & B are used for 110v; C & F are used for 230/240v. It is highly recommended to verify the voltage with a tester before plugging appliances in, no matter the outlet. (There has been no centralized power company in Liberia since the war begin in 1990. All electricity is privately generated.)
Libya D, L 127 V 50 Hz Barce, Benghazi, Derna, Sebha & Tobruk 230 V.
Lithuania C, F 230 V (formerly 220v) 50 Hz
Liechtenstein C, J 230 V 50 Hz Swiss Norm, C only in the form CEE 7/16.
Luxembourg C, F 230 V (formerly 220v) 50 Hz
Macau S.A.R. of China D, M, G, a small number of F 220 V 50 Hz No official standards there. However, in the Macao-HK Ferry Pier built by Portuguese Government before handover the standard was E & F. After handover, Macau adopted G in both government and private buildings.
Macedonia C, F 220 V 50 Hz
Madagascar C, D, E, J, K 127 V
and
220 V
50 Hz
Madeira C, F 220 V 50 Hz
Malawi G 230 V 50 Hz
Malaysia G (but M for air conditioners and clothes dryers) 240 V 50 Hz Penang 230 V. Type C plugs are very common with audio/video equipment. Plugged into Type G outlets using widely-available adapters or forced in by pushing down the shutter. The latter is widely practised, although hazardous.
Maldives A, D, G, J, K, L 230 V 50 Hz
Mali C, E 220 V 50 Hz
Malta G 230 V 50 Hz
Martinique C, D, E 220 V 50 Hz
Mauritania C 220 V 50 Hz
Mauritius C, G 230 V 50 Hz
Mexico A, B 120 V 60 Hz Type B is becoming more common. Voltage can vary from 105 to 145 depending on local transformer. Split phase is commonly available and local electricians are apt to wire both to a type A/B socket to give 240 V for air conditioning or washing machine/dryers.
Micronesia A, B 120 V 60 Hz
Moldova C, F 220-230 V 50 Hz Compatible with European and former Soviet Union (GOST) standards.
Monaco C, D, E, F 127 V
and
220 V
50 Hz
Mongolia C, E 230 V 50 Hz
Montenegro C, F 220 V 50 Hz
Montserrat (Leeward Is.) A, B 230 V 60 Hz
Morocco C, E 127 V
and
220 V
50 Hz Conversion to 220 V only underway.
Mozambique C, F, M 220 V 50 Hz Type M found especially near the border with South Africa, including in the capital, Maputo.
Myanmar/Burma C, D, F, G 230 V 50 Hz Type G found primarily in better hotels. Also, many major hotels chains are said to have outlets that will take Type I plugs and perhaps other types.
Namibia D, M 220 V 50 Hz
Nauru I 240 V 50 Hz
Nepal C, D, M 230 V 50 Hz
Netherlands C, F 230 V (formerly 220v) 50 Hz
Netherlands Antilles A, B, F 127 V
and
220 V
50 Hz St. Martin 120 V, 60 Hz; Saba & St. Eustatius 110 V, 60 Hz, A, maybe B
New Caledonia E 220 V 50 Hz
New Zealand I 230 V 50 Hz Electricity Regulations 1997 states supply voltage is 230 V ±6%
Nicaragua A, B 120 V 60 Hz
Niger A, B, C, D, E, F 220 V 50 Hz
Nigeria D, G 240 V 50 Hz
Norway C, F 230 V 50 Hz IT earthing system
Okinawa A, B 100 V 60 Hz Military facilities 120 V.
Oman C, G 240 V 50 Hz Voltage variations common.
Pakistan C, D, M, G 230 V 50 Hz Official standard is 230 V / 50 Hz. Voltage tolerance is 230 V ±5% (218 V to 242 V). Frequency tolerance 50 Hz ±2% (49 Hz to 51 Hz) But Karachi Electric Supply Corporation (KESC) is 240 V / 50 Hz.
Type C and D Plug / Socket are common for low-power devices. Type M Plug / Socket is common for air conditioners and high-power devices. Type G Plug / Socket is less common.
Panama A, B 110 V 60 Hz Panama City 120 V.
Papua New Guinea I 240 V 50 Hz
Paraguay C 220 V 50 Hz
Peru A, B, C 220 V 60 Hz Talara 110/220 V; Arequipa 50 Hz
Philippines A, B 220 V 60 Hz Most plugs and outlets are Type A, but some are B. Sockets and switches are built to USA dimensions and fit USA sized wall boxes. Some areas have 110V as in Baguio.
Poland C, E 230 V 50 Hz
Portugal C, F 220 V 50 Hz
Puerto Rico A, B 120 V 60 Hz
Qatar D, G 240 V 50 Hz
Réunion E 220 V 50 Hz
Romania C, F 230 V (formerly 220 V) 50 Hz Virtually identical to German standards. Most household sockets still compatible with East European standards (4.0 mm pins).
Russian Federation C, F 220 V 50 Hz The former USSR (along with much of Eastern Europe) uses type GOST sockets with 4.0 mm pins instead of the 4.8mm standard used by West European (Schuko) Plugs. Obsolete standard 127 V/50 Hz AC is used in some peripheral villages. Elsewhere it was replaced in 1970s by the 220V standard. Industrial appliances use 3-phase 380V AC supply.
Rwanda C, J 230 V 50 Hz
St. Kitts and Nevis D, G 230 V 60 Hz
St. Lucia (Winward Is.) G 240 V 50 Hz
St. Vincent (Winward Is.) A, C, E, G, I, K 230 V 50 Hz
São Tomé and Príncipe C, F 220 V 50 Hz
Saudi Arabia A, B, F, G 127 V
and
220 V
60 Hz
Senegal C, D, E, K 230 V 50 Hz
Serbia C, F 220 V 50 Hz
Seychelles G 240 V 50 Hz
Sierra Leone D, G 230 V 50 Hz
Singapore G (but M for air conditioners and clothes dryers) 230 V 50 Hz Types A and C are used for audio/video equipment and plug adapters are widely available.
Slovakia C, E 230 V 50 Hz
Slovenia C, F 230 V 50 Hz 360 V used for heavy duty applications.
Somalia C 220 V 50 Hz
South Africa M 220 V 50 Hz Grahamstown & Port Elizabeth 250 V; also found in King Williams Town
Spain C, F 230 V (formerly 220v) 50 Hz
Sri Lanka D, M, G 230 V 50 Hz Increased use of type G in new houses/establishments. Mainly in Colombo and high end hotels.
Sudan C, D 230 V 50 Hz
Suriname C, F 127 V 60 Hz
Swaziland M 230 V 50 Hz
Sweden C, F 230 V 50 Hz
Switzerland C, J 230 V 50 Hz C only in the form CEE 7/16.
Syria C, E, L 220 V 50 Hz
Tahiti A, B, E 110 V
and
220 V
60 Hz/50 Hz Marquesas Islands 50 Hz
Taiwan A, B 110/220 V 60 Hz Most outlets are Type A. When an outlet is Type B, the ground (earth) holes are usually not connected to anything. Most appliances have Type A plugs, but some appliances have Type B plugs. Sockets and switches are built to USA dimensions and fit USA sized wall boxes. Dedicated sockets provide 220V for air conditioning units.
Tajikistan C, I 220 V 50 Hz
Tanzania D, G 230 V 50 Hz
Thailand A, B, C 220 V 50 Hz Outlets in hotels and newer buildings are usually a combination of types B and C which can accept plug types A, B and C. Outlets in older buildings are usually type A. An equal proportion of appliances have type A or C plugs, or B if it requires an Earth connection. Type F is also in wide use, but are mainly used with high-powered appliances such as air conditioners, tea kettles, and rice cookers. Types A, B and combination B/C sockets are designed to fit USA/Japanese sized wall boxes.
Togo C 220 V 50 Hz Lome 127 V.
Tonga I 240 V 50 Hz
Trinidad & Tobago A, B 115 V 60 Hz
Tunisia C, E 230 V 50 Hz
Turkey C, F 230 V 50 Hz
Turkmenistan B, F 220 V 50 Hz
Uganda G 240 V 50 Hz
Ukraine C, F 220 V 50 Hz
United Arab Emirates C, D, G 220 V 50 Hz
United Kingdom G (D and M seen in very old installs and specialist applications) 240v 50 Hz Voltage tolerance of 230 V +10%/−6% (216.2 V to 253 V), to be widened to 230 V ±10% (207 V to 253 V) in 2008. The system supply voltage will remain centered on 240v rms. A 'shaver' socket (similar to Type C) is sometimes found in bathrooms that will provide low current to some other plug types. These almost always have a 110 V socket and a 240 V socket in the same unit, or a switch to select voltage, which are sometimes labelled as 115 V and 230 V. The G type socket often has a on-off switch on the socket. 110 V centre point earthed transformers are often used for industrial portable tools. IEC 60309 plugs and connectors are used in industrial and construction locations as well as for outdoor use in domestic and other business premises.
United States of America A, B 120 V 60 Hz Standardized at 120 V. Electricity suppliers aim to keep most customers supplied between 114 and 126 V most of the time. 240 V/60 Hz used for heavy duty applications such as air conditioners, clothes dryers, stoves, ovens, and water heaters. Buildings with more than two branch circuits will have both 120 and 240 V available. Type B outlets are now required by code in new construction and renovation. A T-slot Type B is rated for 20 Amperes for use in kitchens or other areas using large 120 V appliances.
Uruguay C, F, I, L 230 V (formerly 220v) 50 Hz Type F becoming more common as a result of computer use. Neutral and live wires are reversed, as in Argentina.
Uzbekistan C, I 220 V 50 Hz
Vanuatu I 230 V 50 Hz
Venezuela A, B 120 V 60 Hz Type G found in household 220V service only for air conditioning and some high power appliances.
Vietnam A, C 220 V 50 Hz Type A is the norm in Southern Vietnam and Type C is the norm in Northern Vietnam (according to the pre-unification border at 17 degrees North). Type G is found only in some new luxury hotels, primarily those built by Singaporean and Hong Kong developers. But Type G is never found in homes, shops, or offices.
Virgin Islands A, B 110 V 60 Hz
Western Samoa I 230 V 50 Hz
Yemen A, D, G 230 V 50 Hz
Zambia C, D, G 230 V 50 Hz
Zimbabwe D, G 220 V 50 Hz

References

See also

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