World Voltage

[mauiboy81]

Hello friends,

If I was building an amp that was to be used around the world what voltage PT primaries would I need? Suppose it was to be used in: US, UK, Europe, Japan, Indonesia, Australia, India, Africa, Israel, etc.

Thanks be to all

Nick

[tubeswell]

A PT that has 110, 120, 220, 240 primaries. Given you'll be using it in 50Hz mains countries as well, you'll also want something that has a generous amount of iron in the core (otherwise it won't last as long in those countries).

[VacuumVoodoo]

You forgot 100V (Japan) and 230V (EU).
Mains frequency worldwide can vary 47-63Hz, design for 47Hz
2 primary winding with taps:
0-100-110-120V
0-100-110-120-130V
Connecting different sections ni series alt parallel covers almost any voltage from 100V to 250V
The norm to comply with is IEC/EN 61558-2-4 (& ROHS for EU)

[husky]

Hello friends,

If I was building an amp that was to be used around the world what voltage PT primaries would I need? Suppose it was to be used in: US, UK, Europe, Japan, Indonesia, Australia, India, Africa, Israel, etc.

Thanks be to all

Nick

230 is important since it is becoming the standard in EU 220 is legacy but still needed, 240,100 and 115, Almost no US states really have 110 more like 120. YOu can look up the world wide charts but it is funny how many people swear they are getting getting different readings from their actual sockets

[VacuumVoodoo]

Hi John,
230V is de facto EU standard since long ago, +/-10% allowed variation.
240V will become standard across EU in 2013 IIRC. We already see over 235-237V at the wall a lot more often than below.

[husky]

Hi John,
230V is de facto EU standard since long ago, +/-10% allowed variation.
240V will become standard across EU in 2013 IIRC. We already see over 235-237V at the wall a lot more often than below.

Wow I thought everything was going to 230, 240 is better for me
Cant you guys make up your minds ! LOL
I still see people measuring 220 as well
I have a tap that works perfect at 235 so I guess I'm in the ball park

[VacuumVoodoo]

We're still sitting on the fence regarding allowed deviation from 240V. +-10% or +5/-10%. +10% might make a lot of equipment obsolete.
Time to make sure our amps don't leak blue smoke at 264V in the wall socket. IMO +5/-10% makes more sense as it will bring 230 and 240 within same tolerance bracket requiring only raising the lower limit on 230V lines from 207 to 216V. Of course now it's the french who are opposing the whole thing of adopting UK norm (which they originally pushed for) because UK wants a new referendum to decide whether to stay in or leave EU altogether.
BTW some don't call EU European Union anymore but Eurosoviet.

[Structo]

I have wondered before why different countries have different standards for power distribution.

America was 110v 60Hz for years and years then it crept up to 117vac.

It's been 120vac (or higher) for a lot of years now.

I think I have read before that with a higher voltage there is less lost energy when transmitted over distances.

Isn't Japan 100v @ 50Hz?

I remember working in Brazil a few years ago, I had to drag around this huge transformer converter to use my power saw and other USA tools that ran on 120vac.

Why wasn't there ever a consortium to standardize transmitted AC?

[paulster]

Wow I thought everything was going to 230, 240 is better for me
Cant you guys make up your minds ! LOL
I still see people measuring 220 as well
I have a tap that works perfect at 235 so I guess I'm in the ball park

John

Despite Europe deciding to harmonise on 230V, certain countries (like the UK) didn't actually change their wall voltage at all since 240V at the regulation limits already specified fell within the new 230V range.

Certain countries stayed on 220V too. For the most part it hasn't made any difference since nearly all consumer electronics goods step the voltage down and regulate it for anything critical, but it has actually made it more of a minefield for applications such as ours where the voltage is stepped up!

So, in 230V harmonised Europe you actually get 220V, 230V or 240V nominal depending on where you happen to be. Only it'll be labelled 230V. And this is progress!

[katopan]

Same in Australia, where all our standards changed over to 230V but if anything the supply companies have raised the voltage to offset the extra losses from more and more load on an ageing network. For an ex-240V, now 230V country, I regularly measure at or sometime above the allowed 253V maximum at my home and my amps can be running their heaters outside the 10% generally acceptable limit, not to mention a higher B+.

[renshen1957]

I have wondered before why different countries have different standards for power distribution.

America was 110v 60Hz for years and years then it crept up to 117vac.

It's been 120vac (or higher) for a lot of years now.

I think I have read before that with a higher voltage there is less lost energy when transmitted over distances.

Isn't Japan 100v @ 50Hz?

I remember working in Brazil a few years ago, I had to drag around this huge transformer converter to use my power saw and other USA tools that ran on 120vac.

Why wasn't there ever a consortium to standardize transmitted AC?

Hi

The European Standard does not require as large a wire (less copper) as the US standard one does for mains wire to homes.

US would use lower ohm speaker impedances than UK cabs; the UK cabs can conserve on costs with smaller wire.

World wide standards? Television (NTSE, PAL, Secam), Railroad Gauges (all over the map), which side of the road to drive on, etc can nations agree on anything?

Best Regards,

Steve

[renshen1957]

Hello friends,

If I was building an amp that was to be used around the world what voltage PT primaries would I need? Suppose it was to be used in: US, UK, Europe, Japan, Indonesia, Australia, India, Africa, Israel, etc.

Thanks be to all

Nick

Hi

If you think your amps are going to Africa, recommend a line conditioner or build in over voltage detection/protection. 240V AC can get as high as 327 V AC.

Table of mains voltages and Region Type(s) of plug / socket[3] Voltage[3] Frequency[3] Comments
Afghanistan C, D, F 240 V 50 Hz Voltage may vary from 160 to 280.
Albania C, F, L 220 V 50 Hz Socket types F and L are the norm. Type L sockets accept type C plugs (Europlug)
Algeria C, F 230 V 50 Hz
American Samoa A, B, F, I 120 V 60 Hz
Andorra C, F 230 V 50 Hz
Angola C 220 V 50 Hz
Anguilla A, 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 230 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%.[4] 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". Bathrooms in hotels will often have a type I, C and A socket marked "for shavers only" as pictured on the right.
Austria C, F 230 V 50 Hz
Azerbaijan C, F 230 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 C, G 230 V 50 Hz 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.
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
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 230 V 50 Hz
Brazil A, B, C, I - Older C, NBR14136:2002 / IEC 60906-1 - Newer devices 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 Jan 1st 2010, Brazil converted to the IEC 60906-1 international plug which looks similar to type J but is not compatible. Since then, all devices and new buildings must comply with the new standard.
Brunei G 240 V 50 Hz
Bulgaria C, F 230 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 Smaller buildings (like houses) are supplied with 240/120V split-single-phase with 240V being used for large loads only and 120V for everything else. Type A outlets are for repairs only (house from the 1950s or older), type B are required for new construction and renovation. A 20-Amp type B but with a T-slot can be used in kitchens in new construction.[5]. Larger buildings are supplied with three phase power of either 208/120V or 600/347V.
Canary Islands C, E, F, 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, People's Republic of A, C, I 220 V 50 Hz Most wall outlets simultaneously support Types A and I. Some outlets support Type C as well (the holes in the outlets are flat in the middle and round on the sides) so that either a Type A, a Type C or a Type I (Unearthed) plug can be used. A second outlet only type I (Earthed) is next to the unearthed multi Type A\C\I 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 similar to the USA National Electric Code.
Comoros C, E 220 V 50 Hz
Republic of the Congo C, E 230 V 50 Hz
Democratic Republic of the Congo 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 Type F wall sockets countrywide standard. Type C wall sockets are very uncommon, and exist only in very old installations.
Cuba A, B 110 V 60 Hz
Cyprus G 240 V 50 Hz
Czech Republic C, E 230 V 50 Hz Type C Plugs are common, especially for low-power devices. Type C wall sockets are very uncommon, and exist only in very old installations.
Denmark C, E, K 230 V 50 Hz Type E is added from July 2008.[6]
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 (formerly 220 V) 50 Hz
France C, E 230 V (formerly 220 V) 50 Hz Type C wall sockets have been prohibited in new installations for more than 10 years.
French Guiana C, D, E 220 V 50 Hz
Gaza Strip C, H 230 V 50 Hz (see Israel in this list)
Gabon C 220 V 50 Hz
Gambia G 230 V 50 Hz
Georgia C 220 V 50 Hz
Germany C, F 230 V (formerly 220 V) 50 Hz Type F ("Schuko", short for "Schutzkontakt") is standard. Type C Plugs 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, (older)"Tripoliko" similar to type J and post-1989 type H 230 V (formerly 220 V) 50 Hz Type F ("Schuko", Greek: Σούκο) 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. Corfu still only uses C 220 V at 50 Hz.
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 Mixture of 50 Hz and 60 Hz distribution according to Guyana Power and Light[7] Conversion of 50 Hz distribution to 60 Hz is ongoing[8]
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. There was a smaller 2 A version of type D, now obsolete.
Hungary C, F 230 V 50 Hz
Iceland C, F 230 V 50 Hz
India C, D, M 230 V 50 Hz Residential power supplied in India is two wire 240 volts, permitted variation 6%, and maximum load 40 amperes. Frequency 50 Hz. Most power outlets are universal and accept many plugs without adapter. A combination receptacle for types C, D and G is usually present.
Indonesia C, F, G 220 V 50 Hz Type G socket/plug is not 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 (obsolete or specialist installations may be D and M (as in the UK) or F) 230 V (formerly 220 V) 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. Type M plugs are permitted for applications where the power draw does not exceed 5 Amps; this power limitation allows type M sockets to be powered from domestic 10 Amp circuits and to be controlled by domestic lighting switches.
Isle of Man G 240 V 50 Hz
Israel C, H, M 230 V 50 Hz The standard for H plugs and sockets was recently modified to use round pins, so 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)[9] 50 Hz The common socket has 8-shaped holes to accept both 16A and 10A version of L plug, but in hotels are still common 10A sockets, schuko socket are very unusual. C sockets are not used in modern installations.
Jamaica A, B 110 V and 220 V 50 Hz
Japan A, B 100 V 50 Hz
and
60 Hz East Japan 50 Hz (Tokyo, Kawasaki, Sapporo, Yokohama, and Sendai); West 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
Kuwait C, G 240 V 50 Hz
Kyrgyzstan C 220 V 50 Hz
Laos A, B, C, E, F 230 V 50 Hz
Latvia C, F 220 V 50 Hz
Lebanon A, B, C, D, G 240 V 50 Hz
Lesotho M 220 V 50 Hz
Liberia A, B, C, E, F 120 V
and
240 V 50 Hz Previously 60 Hz, now officially 50 Hz. Many private power plants are still 60 Hz. A & B are used for 110 V; C & F are used for 230/240 V. Much of the centralized power system was destroyed during the civil wars starting in 1990, and public power supplies are still limited. Local supplies may vary and may not match the usual voltage for a particular wall socket.[10]
Libya D, L 127 V 50 Hz Barca, Benghazi, Derna, Sabha & Tobruk 230 V.
Lithuania C, F 220 V 50 Hz Villa Monarchy uses 127 V 50Hz and type GOST sockets with 4.0 mm pins similar to West European C type plugs
Liechtenstein C, J 230 V 50 Hz Swiss Norm, C only in the form CEE 7/16.
Luxembourg C, F 230 V (formerly 220 V) 50 Hz
Macau, 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. Before 1980s, 110 V was found in Macau but now obsolete.
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 C, G (but M for air conditioners and clothes dryers) 240 V (although officially ratified as 230 V) 50 Hz The official mains power voltage is AC 230 V with the tolerance of +10%,-6%.[11] However, the supplied voltage remains at 240 V, as the supplied voltage is within the allowed tolerance. Areas that rely on private power companies, like some parts of Penang and Kedah, receive a true 230 V supply. Remote villages which rely on off-grid localized diesel generators (i.e. small villages and/or isolated holiday resorts on islands too far away from the mainland to have viable underwater cabling) may receive unstable power with higher voltages, with some areas recorded to be as high as 260 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. Since the late 90s, dedicated Type C sockets can also be found on some power strips sold in the country for convenience given the wide proliferation of devices with Type C plugs. Type C sockets can also be found on dedicated shaver sockets in bathrooms of many hotels. Type M sockets are normally used for air conditioning (especially if the air conditioner requires a magnetic starter), heavy industrial equipment, spotlights, and less commonly, washers and clothes driers. This is because most modern washers sold in the country are also fitted with Type G plugs and are two-in-one compact units which uses the same tub for washing and drying.
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 127 V 60 Hz Type B is becoming more common. Voltage can legally vary by +/- 10% (giving a range of 114 to 140 volts). 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 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 220 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 220 V) 50 Hz
Netherlands Antilles[dated info] 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 (Safety) Regulations 2010 state 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
North Korea C 220 V 60 Hz[12]
Norway C, F 230 V 50 Hz IT earthing system (most widespread)
TN earthing system (new installations)
TT earthing system (used in some installations in Bergen)
Sockets lacking earth are prohibited in new installations.

Okinawa A, B 100 V 60 Hz Military facilities 120 V.
Oman C, G 240 V 50 Hz Voltage variations common.
Pakistan C, D, G, M 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; some areas 50 Hz[13]
Philippines A, B, C 220 V 60 Hz[14] Most plugs and outlets are Type A, but some are C. Type B are commonly found in high powered appliances and computers. Some buildings have sockets that accepts Types A, B and C. Sockets and switches are built to USA dimensions and fit USA sized wall boxes.
Poland C, E 230 V (formerly 220 V) 50 Hz Type C Plugs are common, especially for low-power devices. Type C ungrounded sockets could be seen in old houses and in countryside.
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 USSR (along with much of Eastern Europe) used type GOST sockets with 4.0 mm pins similar to West European C type plugs and the 4.8mm standard used by West European type E/F Plugs.[15] The former Soviet sockets could be seen mainly in old houses and in countryside. Obsolete standard 127 V/50 Hz AC is used in some remote villages. Elsewhere it was replaced in 1970s by the 220 V standard.
Rwanda C, J 230 V 50 Hz
St. Kitts and Nevis A, B, D, G 110 V
and
230 V 60 Hz Region plug is same as United States (2 pin) 110-120 V
St. Lucia (Windward Is.) G 240 V 50 Hz
Saint Pierre and Miquelon E 230 V 50 Hz
St. Vincent (Windward Is.) A, C, E, G, I, K 230 V 50 Hz
Samoa I 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 Saudi Arabia is one of the few countries in the world that still uses a dual-voltage system in different parts of the country. In an attempt to unify the low voltage system in the Kingdom, a decision was made by the Council of Ministers of Saudi Arabia in August 2010 to standardize the low voltage system as 230/400V. The decision took immediate effect for new subscribers and will be implemented in existing facilities in two phases over 25 years (10-year preparatory phase and 15-year executive phase).[16][17]
Senegal C, D, E, K 230 V 50 Hz
Serbia C, F 230 V[18] 50 Hz
Seychelles G 240 V 50 Hz
Sierra Leone D, G 230 V 50 Hz
Singapore C, G 230 V 50 Hz Type C is 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
Somalia C 220 V 50 Hz
South Africa C, M, IEC 60906-1 230 V 50 Hz Type C used for some appliances. Adapters are widely available.
South Korea C, F 220 V 60 Hz Type F is normally found in offices, airports, hotels and homes. Type C (type CEE 7/17) sockets are obsolete and manufacture was discontinued as of 2008, but examples are still found in a lot of places. In cases where a Type C socket was replaced with a Type F, the ground contact is often not connected to anything. 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 were 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.
Spain C, F 230 V (formerly 220 V) 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 (formerly 220 V) 50 Hz Non-grounded sockets are prohibited in new installations. 400 V for some washing machines and other fixed installations. In bathroom etc. 110-115 socket can be found and used for shavers and other "bathroom tools"
Switzerland C, J 230 V 50 Hz C only in the form CEE 7/16. In some very old installations, type E sockets or sockets that are compatible with type J and type E plugs are found.
Syria C, E, L 220 V 50 Hz
Taiwan A, B 110 V 60 Hz All outlets are Type A or Type B. When an outlet is Type B, the ground (earth) holes of the outlets are usually not connected to anything. Most appliances have Type A plugs, but computers and high-power appliances have Type B plugs. The ground prongs on Type B plugs are often cut off to make the plugs fit into Type A sockets. Sockets and switches are built to USA dimensions and fit USA sized wall boxes. Different outlets (which can not accept Type A or Type B plugs) provide 220 V for air conditioners.
Tahiti A, B, E 110 V
and
220 V 60 Hz/50 Hz Marquesas Islands 50 Hz[19]
Tajikistan C, I 220 V 50 Hz
Tanzania D, G 230 V 50 Hz
Thailand A, B, C, F, Unearthed I 220 V 50 Hz Outlets in hotels and most buildings are usually a combination of types B and C which will accept plug types A, B, C and I, while outlets in older buildings are usually type A. Only Unearthed Type I plugs can be used in these combination sockets, earthed type I plugs will not fit. An equal proportion of appliances have type A or C plugs, or B if an Earth connection is required. Type F is mainly for high-powered appliances such as air conditioners, kettles and cookers. A 3-pin plug that only fits in B/C sockets is also seeing increased use, it differs from type B by having all the pins round.[20] Receptacles and switches for in-wall use are built to USA dimensions and fit USA standard type 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) 230 V (formerly 240 V in mainland Britain and 220 V in Northern Ireland) 50 Hz Voltage tolerance of 230 V +10%/−6% (216.2 V to 253 V), widened to 230 V ±10% (207 V to 253 V) in 2008. The system supply voltage remains centred on 240 V.[21] A "shaver socket" (similar to Type C) is sometimes found in bathrooms that will provide low current to some other plug types. These sometimes have a ~110 V socket and a ~240 V socket in the same unit, or a switch to select voltage for a single socket. The G type socket usually has an on-off switch. IEC 60309 plugs and connectors are used in industrial and construction locations as well as for outdoor use in domestic and other business premises. Plug types D and M were used until the 1960s and are still in preferred use for theatre and TV stage lighting applications due to lack of internal fuse.
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 large appliances. Large residential buildings frequently have 120/208V 3-phase power, with large appliances being connected between two of the phases, giving a voltage of 208 volts. Since 1962, Type B outlets are 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, L (I only in very old installs) 230 V (formerly 220 V) 50 Hz Type L is the most common in modern homes and type F is the second 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 240 V service only for air conditioning and some high power appliances.
Vietnam A, C, G 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
Yemen A, D, G 230 V 50 Hz
Zambia C, D, G 230 V 50 Hz
Zimbabwe D, G 220 V 50 Hz

The US State department has info too

Best Regards

Steve