Mains electricity by country
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Mains electricity by country 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. Every country has differing rules regarding distribution of electricity for portable appliances and lighting. Voltage, frequency, and plug type vary widely, but large regions may use common standards. Physical compatibility of receptacles may not ensure compatibility of voltage, frequency, or connection to earth ground.
This article lists the plug type, voltage and frequency commonly expected for many territories. In some areas, older standards may still exist. Foreign enclaves or buildings frequented by tourists may support plugs not otherwise used in a country, for the convenience of travellers.
- 1 Main reference source—IEC World Plugs
- 2 Plugs
- 3 Safety considerations
- 4 Voltages
- 5 History of similar guides
- 6 Table of mains voltages and frequencies
- 7 See also
- 8 References
- 9 External links
Main reference source—IEC World Plugs
The International Electrotechnical Commission publishes a web microsite World Plugs[unreliable source?] which provides the main source for this page, except where other sources are indicated. World Plugs includes some history, a description of plug types, and a list of countries giving the type(s) used and the mains voltage and frequency.
Although useful for quick reference, especially for travellers, IEC World Plugs may not be regarded as totally accurate, as illustrated by the examples in the plugs section below, and errors may exist, such as Indonesia being listed as using both 220 V and 110 V when the Indonesian Standard SPLN 1 clearly states the voltage as 230 V.
A plug is defined in IEC 60050 as an accessory having pins designed to engage with the contacts of a socket-outlet, also incorporating means for the electrical connection and mechanical retention of flexible cables or cords, a plug does not contain components which modify the electrical output from the electrical input (except where a switch and/or fuse is provided as a means of disconnecting the output from input). There is an erroneous tendency to refer to power conversion devices with incorporated plug pins as plugs, but IEC 60050 refers to these as 'direct plug-in equipment' defined as equipment in which the mains plug forms an integral part of the equipment enclosure so that the equipment is supported by the mains socket-outlet. In this article, the term 'plug' is used in the sense defined by IEC 60050.
The types used in each country are set by national standards, some of which are listed in the IEC technical report TR 60083, Plugs and socket-outlets for domestic and similar general use standardized in member countries of IEC.
The international standard IEC 60884-1 defines the general requirements for plugs and sockets intended for household and similar purposes, IEC 60884-1 does not define specific plug and socket types which are the subject of national standards in each country. IEC 60884-1 para 9.2 does stipulate that: it shall not be possible, within a given system, to engage a plug with a socket-outlet having a higher voltage rating or a lower current rating. IEC 60884-1 para 6.1 defines the preferred voltage ratings for single phase plugs and sockets as 130 V or 250 V. In the foreword of IEC 60884-1 it states: in order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
The lettering system used here is from World Plugs which defines the letter names and gives a (not always correct) list of what plug types are used where. Type A makes specific reference to American and Japanese plugs, as does Type B which is specifically rated at 15 A. Type C is specifically identified as the Europlug (which is defined in EN 50075) and described as a plug which fits into any socket that accepts 4.0–4.8 mm round contacts on 19 mm centres. Type D is specifically rated at 5 A. Type E (grounding pin in socket) and Type F (grounding clips on both sides) are specifically rated at 16 A and defined as having 4.8 mm pins on 19 mm centres. Type G is identified as the fused British plug. The Type H plug is described as unique to Israel. Type I (Australian) is described as having both 10 A and 15 A ratings. Type J (Swiss) is rated at 10 A and is differentiated from Type N. The Type K rating is not shown. The Type L (Italian) description includes both ratings and pin sizes. Type M is described as looking similar to Type D, but with much larger pins. The Type N description is of the two variations of Brazilian plug (Brazilian national standard NBR 14136); however, the original plug and socket is defined in IEC 60906-1 and has been adopted as a South African national Standard (SANS 164-2). The Brazilian version is non-compliant with the IEC standard. Not all plugs are included in the letter system; for example, there is no designation for the plug defined by the Thai National Standard TIS116-2549.
IEC World Plugs is ambiguous in some areas: it does not reference national technical standards that define the dimensions and tolerances of devices. Plugs will usually mate with sockets which are intended to accept plugs classified under the same letter type, but there is no guarantee of this. There is also an issue relating to Type C, the EN 50075 Europlug which has no dedicated socket in the standard and is designed to fit sockets accepting "4.0–4.8 mm round contacts on 19 mm centres", implying that there must be usage of such sockets in the territories listed as using Type C plugs. Despite this, World Plugs lists seven territories as using only Type C (i.e., no mention of specific plug types whose mating sockets also accept Type C) and twenty-one territories using Type C with no compatible types. This may be for a number of reasons, for instance the Thai standard TIS 166-2549 includes a socket which will also accept Types A, B and C plugs as well as the Thai plug (which does not have an IEC classification letter). Another possible reason is the use of so-called "universal sockets" in use in some countries, these accept multiple plug types but meet no standards and are not classified by the IEC.
Multi-standard sockets and adapters
Multi-standard sockets are sometimes used in China and some other Asian countries; these are intended to accommodate plugs conforming to various different standards. They do not normally have earthing (grounding) connections for either CEE 7/4 "Schuko", or CEE 7/5 (French), or their combination CEE 7/7. In multi-standard sockets, the aperture size for NEMA plugs is often the same for both Line (Hot) and Neutral, which allows a polarized plug to be inserted in either orientation, thus defeating the safety feature. Also, in a socket designed to accept both NEMA and BS 1363 plugs, the polarization can only be correct for one type of plug, so only appliances which do not require specific polarization should be connected. Multi-standard sockets made by Lengon are amongst those classified as serious safety risks, because they allow the user to come into contact with live parts.
Adapters that allow insertion of otherwise mechanically incompatible plugs into sockets are useful for travellers, but, as with multi-standard sockets, may not ensure the grounding and polarization intended by a compatible system of plugs and sockets.
Voltage rating of plugs and power cords
Plugs and power cords have a rated voltage (V) and rated current (A) assigned to them by the manufacturer, and these values are required to be marked on the plug. For a plug, the values are normally those specified in the relevant standard sheet. The international preferred rating for household plugs and sockets is either 130 V or 250 V; these are the values for normal use, and at which they are tested. (Plugs and power cords are also required to be tested at higher voltage for a brief period of 1 minute to test their electrical strength in case of fault conditions.) The NEMA 1–15 U.S. 2 pin (Type A) and NEMA 5–15 U.S. 3 pin (Type B) plugs are rated at 125 V. Similar plugs used in countries with higher mains voltages in the range 220–250 V are rated at 250 V. Using an appliance, plug or power cord which is not appropriate for the territory (e.g. one rated for 125 V with a 230 V supply) may constitute a safety hazard.
Type A and Type B sockets at greater than 125 V
Sockets connected to mains voltages above 125 V and which accept Type A or B plugs may be suitable for chargers and power supplies incorporating Type A pins, providing they have a suitable voltage rating.
Differences in standards for those plugs classified as Type I
Type I plugs also have differences in characteristics such as pin length. This means that the uninsulated pins of a Chinese plug may become live while there is still a large enough gap between the faces of the plug and socket to allow a finger to touch the pin. Argentinean connectors have the opposite polarity to those of other Type I countries.
National wiring regulations sometimes prohibit the use of sockets within certain areas adjacent to water taps etc. In such cases shaver supply units meeting IEC 61558-2-5 may be permissible. These include an isolation transformer and usually accept multiple two-pin plug types including Europlug (Type C), Australian (Type I) and BS 4573. The isolation transformer often includes a 115 V output accepting two-pin US plugs (Type A). Shaver supply units must also be current limited, IEC 61558-2-5 specifies a minimum rating of 20 VA and maximum of 50 VA. IEC 61558-2-5 requires sockets to be marked with the shaver symbol defined in IEC 60417-5225, the words "shavers only" are also often used but not required. IEC 61558-2-5 has been adopted as a European CENELEC standard EN 61558-2-5 and also as a national standard in some countries, e.g. UK (BS EN 61558-2-5) and Malaysia (MS IEC 61558-2-5).
Voltages in this article are the nominal single-phase supply voltages. Three-phase and industrial loads will have other voltages.
All voltages are root mean square voltage; the peak AC voltage is greater by a factor of √2, and the peak to peak voltage greater by a factor of 2√2.
History of similar guides
In 1948 the US Government Printing Office published World electric current characteristics. This contained information on voltages used in the cities of many countries, but no information on plugs. The guide was republished by the US Department of commerce in 1954 as Electric Current Abroad. This was updated from time to time and the 1967 version includes some information on plugs, however only 3 types were designated: Type A, illustrated by a US style 2 pin plug, Type B, illustrated by a sketch of a BS 546 type, and Type C, illustrated by a sketch of a BS 1363 type. The 1984 edition uses the letters A to G in the same manner as they are used today. The last printed edition (listing plugs from A to H) was that of 1998, reprinted in 2002, it includes brief textual descriptions of each type illustrated by a sketch, only Type F (described as a Schuko) is specifically linked to a generally recognized type. The International Trade Administration of the US Department of Commerce now publishes a web version: Electric Current Worldwide which still does not include the full list of plug types; it does not describe Type M or type N. There are sketches and photographs of each type, but no textual description or references to actual standards. Examples of errors in the website include the failure to mention that Brazil uses Type N, although that has been the national standard in that country since 1998; stating that the UK uses type C, which is not permitted there; and claiming that China uses Type H (the Israeli plug) when the main Chinese plug is actually type I.
There are many web sites from unofficial sources which also purport to offer lists of voltages and plug types.
Table of mains voltages and frequencies
Entries in the plug standard column refer to the national standards pertaining to the relevant territory, and unless otherwise stated are sourced from IEC Technical Report 60083.
- World Plugs Retrieved on 2014-01-01.
- SPLN 1 : 1995, Standar PLN. "Tegangan-tegangan Standar". Retrieved 1 December 2013.
- IEC/TR 60083 ed6.0: Plugs and socket-outlets for domestic and similar general use standardized in member countries of IEC. International Electrotechnical Commission, February 2009. This 384-page technical report describes many national standards for domestic plugs and sockets. The first edition was published in January 1957. The 7th edition was approved in December 2012 and awaits publication as at 20th January 2015.
- IEC 60884-1 ed3.2, Plugs and socket-outlets for household and similar purposes - Part 1: General requirements, CH: International Electrotechnical Commission, 2013
- "IEC World Plugs" lists the following territories as using Type C only: Angola, Gabon, Guinea Bissau, Mauritania, Paraguay, Somalia, Togo. It also lists the following territories as using Type C without compatible socket types: Argentina, Bolivia, Cambodia, China, Gibraltar, India, Iraq, Isle of Man, Kuwait, Lebanon, Malaysia, Mauritius, Nepal, Oman, Pakistan, Peru, Singapore, Sudan, United Arab Emirates, Vietnam, Zambia. |World Plugs
- "Electric Current Abroad" (PDF). U.S. Department of Commerce, International Trade Administration. 2002.
- "Universal socket-outlets – friend or foe?" (PDF), SwitchedOn, United Kingdom: Electrical Safety Council (issue 29, Summer 2013): 14–15, 2013, retrieved 2015-01-23
- Notification Reference: A12/0135/13 (online report), Weekly overview report of RAPEX notifications Report 5 (Ref. 6 A12/0135/13), Brussels, Belgium: European Commission, 8 February 2013, retrieved 2016-04-08
- Plugs and socket-outlets for household and similar purposes – Part 1: General requirements (PDF) (Technical report) (3.2 Consol. with am1&2 ed.). Geneva, Switzerland: International Electrotechnical Commission IEC. 14 February 2013. pp. ???. IEC 60884-1. Retrieved 2015-01-23.
- ANSI/NEMA WD 6-2012 (Technical report). Wiring Devices—Dimensional Specifications. USA: NEMA. 31 July 2013. 100208. Retrieved 2015-01-23.
Covers dimensional requirements for plugs and receptacles rated up to 60 A and 600 V, including dimensions for wall plates.
- Plugs and socket-outlets for domestic and similar general use standardized in member countries of IEC (PDF) (Technical report) (6.0 ed.). Geneva, Switzerland: International Electrotechnical Commission IEC. 23 February 2009. p. ?. IEC/TR 60083. Retrieved 2015-01-23.
- IEC 61558-2-5 includes the following definitions: (3.1.101) Shaver transformer: isolating transformer for fixed installation and with a limited output, designed to supply electric shavers, toothbrushes, and similar appliances rated 50 VA or less used in a bathroom. It supplies only one shaver, or the like, at a time and (3.1.102) Shaver supply unit: accessory embodying a shaver transformer or a power supply unit incorporating a shaver transformer, and one or more socket outlets allowing the use of only one plug at a time.
- . Retrieved on 2013-12-14.
- . Retrieved on 2013-12-14.
- . Retrieved on 2013-12-14.
- AS60038-2012 Standards Australia – Standard Voltages
- When voltage varies. Electrical connection (2012-10-22). Retrieved on 2014-05-24.
- "Curaçao Electricity". Curaçao Tourist Board. Retrieved 13 May 2014.
- DS 60884-2-D1:2011
- History of Guyana Power and Light. Gplinc.com. Retrieved on 2014-01-01.
- GPL Converting Parts of the City to 60 Hz, retrieved 2009 July 31. Stabroeknews.com (2009-07-10). Retrieved on 2014-01-01.
- "Code of Practice for the Electricity (Wiring) Regulations" (PDF). Electrical and Mechanical Services Department. p. 221. Retrieved 28 May 2016.
- IS 1293
- I.S. 401, "Safety requirements for rewirable and non-rewirable 13A fused plugs for normal and rough use having insulating sleeves on live and neutral pins", NSAI (National Standards Authority of Ireland), (1997), Dublin
- . Standard Conditions of Supply of Electricity. (Macau) Retrieved on 2016-04-14
-  Plug Top/Plug (15 A and below) -Energy Commission of Malaysia.
-  Energy Commission of Malaysia.
- . Malaysian Energy Commission Notice (Nominal Voltage - undated). Retrieved on 2014-07-14
-  Socket Outlet (15 A and below) -Energy Commission of Malaysia. (MS 1579:2003 is adaptor for Europlugs.)
- Dilwyn Jenkins, The Rough Guide to Peru 2003 Rough Guides, ISBN 1-84353-074-0, p. 57
- ГОСТ 7396.1–89. Elec.ru (2013-01-30). Retrieved on 2013-02-05.
- "Information SEV 1011 – power socket/plug/connector" (PDF). esti.admin.ch (PDF). Federal Inspectorate for Heavy Current Installations ESTI, Swiss Confederation. 1 August 2011. Retrieved 2014-08-22.
- "New standard for plugs in Switzerland starting from 2013" (PDF) (PDF). Federal Inspectorate for Heavy Current Installations ESTI, Swiss Confederation. 13 May 2011. Retrieved 2014-08-22.
- TIS 166-2549 (2006): Plugs and socket-outlets for household and similar purposes : plugs and socket-outlets with rated voltage not exceeding 250 (English translation)
- TIS 166-2549 (2006) (Original Thai)
- ДСТУ ЕN 50160:2014
- Mullins, Malcolm (Spring 2006). "The Origin of the BS 1363 Plug and Socket-Outlet System". IEE Wiring Matters. Institute of Electrical Engineers. Retrieved 2016-10-16.
- The Electricity Safety, Quality and Continuity Regulations 2002 PART VII Regulation 27, UK: UK Government, 2002
- Electrical systems travel guide from Wikivoyage