Mains electricity by country explained

Mains electricity by country includes a list of countries and territories, with the plugs, voltages and frequencies they commonly use for providing electrical power to low voltage appliances, equipment, and lighting typically found in homes and offices. (For industrial machinery, see industrial and multiphase power plugs and sockets.) Some countries have more than one voltage available. For example, in North America, a unique split-phase system is used to supply to most premises that works by center tapping a 240 volts transformer. This system is able to concurrently provide 240 volts and 120 volts. Consequently, this allows homeowners to wire up both 240 V and 120 V circuits as they wish (as regulated by local building codes). Most sockets are connected to 120 V for the use of small appliances and electronic devices, while larger appliances such as dryers, electric ovens, ranges and EV chargers use dedicated 240 V sockets. Different sockets are mandated for different voltage or maximum current levels.

Voltage, frequency, and plug type vary, but large regions may use common standards. Physical compatibility of receptacles may not ensure compatibility of voltage, frequency, or connection to earth (ground), including plugs and cords. In some areas, older standards may still exist. Foreign enclaves, extraterritorial government installations, or buildings frequented by tourists may support plugs not otherwise used in a country, for the convenience of travellers.

Main reference sourceIEC World Plugs

The International Electrotechnical Commission (IEC) publishes a web microsite World Plugs[1] 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.

Voltages

Voltages in this article are the nominal single-phase supply voltages, or split-phase supply voltages. Three-phase and industrial loads may have other voltages.

All voltages are root mean square voltage; the peak AC voltage is greater by a factor of

\sqrt{2}

, and the peak-to-peak voltage greater by a factor of

2\sqrt{2}.

Plugs

See main article: AC power plugs and sockets.

The system of plug types using a single letter (from A to N) used here is from World Plugs, which defines the plug type letters in terms of a general description, without making reference to specific standards. Where a plug does not have a specific letter code assigned to it, then it may be defined by the style sheet number listed in IEC TR 60083. Not all plugs are included in the letter system; for example, there is no designation for the plugs defined by the Thai National Standard TIS 116-2549, though some web sites refer to the three-pin plug described in that standard as "Type O".

Identification guide

Table of mains voltages, frequencies, and plugs

Country or territoryPlug typeNational plug
standard[2]
VoltageFre­quen­cyNotes
Resi­dentialThree-phase[3]
AfghanistanC, F220 V380 V50 Hz
AlbaniaC, F230 V400 V50 Hz
AlgeriaC, F240 V400 V50 Hz
American SamoaA, B, F, I120 V208 V60 Hz
AndorraC, F230 V400 V50 Hz
AngolaC, F220 V380 V50 Hz
AnguillaA, B110 V120/208 V
127/220 V
240/415 V
60 Hz
Antigua and BarbudaA, B230 V400 V60 Hz
ArgentinaC, IIRAM 2073220 V[4] 380 V50 HzLine and neutral reversed compared to Chinese and Australian/NZ Type I.
ArmeniaC, F230 V400 V50 Hz
ArubaA, B, F127 V220 V60 Hz
AustraliaIAS/NZS 3112230 V
240 V
400 V
415 V
50 HzNominal voltage is 230/400 V, in practice 240/415 V is more commonly used.
AustriaC
F
ÖVE-IG/EN 50075
ÖVE/ÖNORM E 8620
230 V400 V50 Hz
AzerbaijanC, F220 V380 V50 Hz
BahamasA, B120 V208 V60 Hz
BahrainG230 V400 V50 Hz
BangladeshA, C, D, G, K220 V380 V50 Hz
BarbadosA, B115 V200 V50 Hz
BelarusC, F230 V400 V50 Hz
BelgiumC, E230 V230/400 V50 Hz
BelizeA, B, G110 V
220 V
190 V
380 V
60 Hz
BeninC, E220 V380 V50 Hz
BermudaA, B120 V208 V60 Hz
BhutanC, D, F, G, M230 V400 V50 Hz
A, B, C115 V
230 V
400 V50 Hz
,[5] [6] [7] [8]
and
A, B127 V220 V50 HzSockets for 220-240 V European type C plugs are typically available at hotels; some buildings modify voltage, so travellers are advised to check before plugging in. Type F are also available at some hotels.
Bosnia and HerzegovinaC, F230 V400 V50 Hz
BotswanaD, G, M230 V400 V50 Hz
BrazilC, NNBR 14136127 V
220 V
220 V
380 V
60 HzBefore standardization, socket types varied: C (very old installations), I (for air conditioners), and combinations like A/C and A/B/C.
A, B110 V190 V60 Hz
G240 V415 V50 Hz
BulgariaC, F230 V400 V50 Hz
Burkina FasoC, E220 V380 V50 Hz
BurundiC, E220 V380 V50 Hz
CambodiaA, C, G230 V400 V50 HzSockets for British type G plugs are mainly found at some hotels and never in households.
CameroonC, E220 V380 V50 Hz
CanadaA
B
NEMA 14-30 
NEMA 14-50
CSA C22.2 No. 42[9] 120 V
120 V[10]
240 V
240 V
120/208 V
240 V
277/480 V
347/600 V
60 HzHomes are typically provided with 120/240 V split-phase power; NEMA 14-30R and 14-50R receptacles are provided on 240 V circuits for clothes dryers and electric stoves.[11]
Cape VerdeC, F220 V400 V50 Hz
Cayman IslandsA, B120 V240 V60 Hz
Central African RepublicC, E220 V380 V50 Hz
ChadC, D, E, F220 V380 V50 Hz
ChileC, F, L220 V380 V50 HzL is the national official standard; C and F are compatible. Schuko or type F plugs are often used for high power appliances.
ChinaA, C, IGB/T 1002
GB/T 2099
220 V380 V50 HzType C was removed from GB/T 1002-2021, but A/C hybrid sockets still appear in old installations.
Line/neutral reversed compared to Argentinian Type I.
ColombiaA, B120 V120/208 V
277/480 V
120/240 V
240/208/120 V
240 V
480 V
60 HzNEMA 5-20R outlets, which are similar to type B but have a T-shaped neutral slot, are sometimes used for higher current 120 V commercial equipments (up to 20 A). On the other hand, NEMA 10-50P outlets are sometimes used for 208 V and 240 V industrial equipments (up to 50 A).
ComorosC, E220 V380 V50 Hz
C, E230 V400 V50 Hz

[12]
C, D, E220 V380 V50 Hz
Cook IslandsIAS/NZS 3112240 V415 V50 Hz
Costa RicaA, B120 V208 V
240 V
480 V
60 Hz
Cote d'IvoireC, E230 V380 V50 Hz
CroatiaC, F230 V400 V50 Hz
CubaA, B, C, L110 V190 V60 HzSome modern hotels have 220 V sockets for European 2-pin plugs (Type C).[13]
A,[14] B127 V[15] 220 V
380 V
50 HzSome hotels and apartments have 220 V European sockets.[16]
CyprusG240 V400 V50 Hz
Czech RepublicC, EČSN 35 4516230 V400 V50 Hz
DenmarkC
E, F, K
DS/EN 50075
DS 60884-2-D1[17]
230 V400 V50 HzType E and F sockets are rare but legal, type E, F and 7/7 plugs work as type C (unearthed).
DjiboutiC, E220 V380 V50 Hz
DominicaD, G230 V400 V50 Hz
Dominican RepublicA, B, C110 V120/208 V
277/480 V
60 Hz
EcuadorA, B120 V208 V
480 V
60 Hz
EgyptC, F220 V380 V50 Hz
El SalvadorA, B115 V208 V
220 V
440 V
480 V
60 Hz
Equatorial GuineaC, E220 V380 V50 Hz
EritreaC, L230 V400 V50 Hz
EstoniaC, F230 V400 V50 Hz
M230 V400 V50 Hz
EthiopiaC, E, F, L220 V380 V50 HzType E is very rare because Ethiopia never had French influences.
G240 V415 V50 Hz
Faroe IslandsC, E, F, K230 V400 V50 HzSame as in Denmark.
FijiIAS/NZS 3112240 V415 V50 HzSame as in Australia.
FinlandC
F
SFS-EN 50075
SFS 5610
230 V400 V50 Hz
FranceC
E
NF EN 50075
NF C 61-314
230 V400 V50 Hz
French GuianaC, E220 V380 V50 Hz
French PolynesiaA, B, C, E, F110 V
220 V
380 V60 Hz[18]
50 Hz
GabonC, E220 V380 V50 Hz
GambiaG230 V400 V50 Hz
GeorgiaC, F220 V380 V50 Hz
GermanyC
F
IEC 60309
DIN VDE 0620
DIN 49441
DIN EN 60309
230 V400 V50 Hz
GhanaD, G230 V400 V50 Hz
GibraltarC, G240 V400 V50 Hz
GreeceC, F230 V400 V50 Hz
GreenlandC, E, F, K230 V400 V50 Hz
GrenadaG230 V400 V50 Hz
GuadeloupeC, D, E230 V400 V50 Hz
GuamA, B110 V190 V60 Hz
GuatemalaA, B120 V208 V60 Hz
G230 V400 V50 Hz
GuineaC, F, K220 V380 V50 Hz
Guinea-BissauC, E, F220 V380 V50 Hz
GuyanaA, B, D, G110 V
220 V[19]
190 V60 Hz
50 Hz
Conversion of 50 Hz distribution to 60 Hz is ongoing.[20]
HaitiA, B110 V220/380 V
110/220 V
60 Hz
HondurasA, B110 V208 V
230 V
240 V
460 V
480 V
60 Hz
Hong KongG
D, M[21]
BS 1363
BS 546
220 V380 V50 HzType G is most common.
HungaryC
F
MSZ EN 50075
MSZ 9781-2
230 V400 V50 Hz
IcelandC, F230 V400 V50 Hz
IndiaC, D, MIS 1293[22] 230 V[23] 400 V[24] 50 Hz

(1) It is worth noting that the combination of a Type C, E or F plug with a Type D socket may often be workable; but it is unsafe to use.[25] Type C, E & F plugs/sockets are not accepted in the IS 1293 standard. The standard uses Type D sockets for 6 A current and Type M sockets for 16 A current.[26] [27] [28] [29]

(2) From August 2015, the Bureau of Indian Standards (BIS) began clamping down on the sale in the country of imported products with the Type C/E/F plug by pushing manufacturers and importers to comply with the IS 1293 standard.[30] In June 2022, BIS began enforcing the standard through mandatory certification of both imported and domestic products.[31]

IndonesiaA
C, F
G
-
SNI 04-3892
-
220 V
230 V
380 V
400 V
50 Hz

(1) Nominal grid voltage according to regulation is 230/400 V,[32] but in practice, equipment with 220/380 V is more commonly used.

(2) Types C and F plugs are officially recognized by SNI 04-3892.1.1-2003.

(3) British Type G sockets are common in Riau Islands due to their close proximity to Singapore. British Type G sockets are often used as dedicated sockets for air conditioners as well.April 2024.

(4) Wall sockets in most homes in North Sumatra (in cities such as in Medan and Pematangsiantar) generally accept both Type A and Type C plugs.

C, F220 V400 V50 Hz
IraqC, D, G230 V400 V50 Hz
IrelandGI.S. 401[33] 230 V400 V50 HzType G is the only general purpose outlet type in use in Ireland. Bathrooms may have shaver sockets. These accept 2.5 amp Europlug CEE 7/16 and UK type BS4573 plugs, which used on shavers and toothbrushes. They do not accept larger Type C plugs and general purpose outlets are generally banned in bathrooms / wet areas. Some hotels may also provide a Type F (Schuko) socket as a convenience for European visitors.
G230 V400 V50 HzSelf-governing British crown dependency, but generally uses UK technical standards.
IsraelC, H230 V400 V50 Hz
ItalyC
F, L
CEI 23-34
CEI 23-50
230 V400 V50 HzType L uses two gauges of plug and socket. The 10 Amp version has pin spacing that is compatible with Europlug. The 16 Amp version uses wider pin spacing and larger pins. Hybrid outlets that accept both types are common and some also accept type F. NB: 16 Amp Type C plugs, such as CEE 7/17 commonly found on hairdryers, will not fit Type L outlets and need an adapter, or should be used with a Type F or hybrid Type L/F outlet.
JamaicaA, B110 V190 V50 Hz
JapanA, BJIS C 8303100 V
200 V
200 V
415 V
50 Hz
60 Hz
East Japan 50 Hz (Tokyo, Kawasaki, Sapporo, Yokohama, and Sendai); West Japan 60 Hz (Okinawa, Osaka, Kyoto, Kobe, Nagoya, Hiroshima). 120 V in military facilities in Okinawa.[34] Majority of sockets accept only type A plugs. See Energy in Japan for more.
G230 V400 V50 Hz
JordanB, C, D, F, G, J230 V400 V50 Hz
KazakhstanC, F230 V400 V50 Hz230/400 V voltage is defined in "GOST 29322-2014 Mezhgosudarstvennyi Standart Napryazheniya Standartnye".
KenyaG240 V415 V50 Hz
KiribatiIAS/NZS 3112230 V400 V50 Hz

C, F230 V400 V50 Hz
KuwaitC, G240 V415 V50 Hz
KyrgyzstanC, F220 V380 V50 Hz
A, B, C, E, F230 V400 V50 HzSome buildings and households have hybrid sockets compatible with type A, B and C.
LatviaC, F230 V400 V50 Hz
LebanonA, B, C, D, G220 V400 V50 HzType C sockets are the most frequent. Many buildings and households have double use sockets compatible with type A and C.
LesothoM220 V380 V50 Hz
LiberiaA, B, C, E, F120 V
220 V
208 V60 Hz
50 Hz
LibyaC, D, F, L127 V
230 V
400 V50 HzBarca, Benghazi, Derna, Sabha & Tobruk 230 V.
LiechtensteinC, J230 V400 V50 Hz
LithuaniaC, F230 V400 V50 Hz
LuxembourgC, F230 V400 V50 Hz
D, F, G, M230 V[35] 400 V50 Hz
MadagascarC, D, E, J, K127 V
220 V
380 V50 Hz
MalawiG230 V400 V50 Hz
MalaysiaC[36]
G
M[37]
MS 1578:2003
MS 589:PT.1:1997
MS 1577:2003
230 V[38] 400 V50 Hz

Type C requires adaptor. Bathrooms may have shaver supply units.[39]

Type M is used mainly for air conditioners and boilers.

MaldivesD, G, J, K, L230 V400 V50 Hz
MaliC, E220 V380 V50 Hz
MaltaG230 V400 V50 Hz
MartiniqueC, D, E220 V380 V50 Hz
MauritaniaC, E, F220 V220 V50 Hz
MauritiusC, E, G230 V400 V50 Hz
MexicoA, BNMX-J-163-ANCE120 V
127 V
240 V
220 V
60 HzBoth 120/240 V split-phase and 127/220 V three-phase are used.
A, B120 V208 V60 Hz
C, F220 V400 V50 Hz
MonacoC, D, E, F230 V400 V50 Hz
MongoliaC, E, F220 V400 V50 Hz
MontenegroC, F230 V400 V50 Hz
MontserratA, B230 V400 V60 Hz
MoroccoC, E127 V
220 V
380 V50 Hz
MozambiqueC, F, M220 V380 V50 Hz
MyanmarA, C, D, F, G, I230 V400 V50 Hz
NamibiaD, M220 V380 V50 Hz
NauruIAS/NZS 3112240 V415 V50 Hz
NepalC, D, M230 V400 V50 Hz
NetherlandsC
F
EN 50075
NEN 1020
230 V400 V50 Hz
New CaledoniaC, F220 V380 V50 HzDespite that New Caledonia is a French territory, German Schuko Type F sockets are used instead of French Type E sockets.
New ZealandIAS/NZS 3112230 V400 V50 HzLine and neutral reversed compared to Argentinian Type I.
NicaraguaA, B120 V208 V60 Hz
NigerA, B, C, D, E, F220 V380 V50 Hz
NigeriaD, G230 V415 V50 Hz
NiueIAS/NZS 3112230 V400 V50 Hz
A, C, F110 V
220 V
380 V60 Hz
50 Hz
C, F230 V400 V50 Hz
NorwayC
F
NEK EN 50075
NEK 502
230 V230 V
400 V
50 Hz230 V on IT grid, and 400 V on TN grid.
OmanG240 V415 V50 Hz
PakistanC, D, G, M230 V400 V50 Hz
PalauA, B120 V208 V60 Hz
C, H230 V400 V50 Hz
PanamaA, B110 V240 V60 Hz
Papua New GuineaIAS/NZS 3112240 V415 V50 Hz
ParaguayA, B, C, N220 V380 V50 Hz
PeruA, B, C
F, L[40]
220 V380 V
440 V
60 Hz
PhilippinesA, B, C115 V
230 V[41]
220 V
380 V
440 V
60 Hz50 Hz used in some establishments such as malls.
PolandC, EBN-88/3064230 V400 V50 Hz
PortugalC, E, FNP 1260230 V400 V50 HzType E is very rare, used only in very old installations.
Puerto RicoA, B120 V480 V60 Hz
QatarD, F, G, L240 V415 V50 Hz
ReunionC, E220 V400 V50 Hz
RomaniaC, F230 V400 V50 Hz
C, F230 V[42] 400 V50 HzUSSR (along with much of Eastern Europe) used GOST sockets with 4.0 mm pins similar to Type C plugs and the 4.8 mm standard used by Type E & F.[43]
RwandaC, E, F, G, J230 V400 V50 Hz
Saint Helena, Ascension and Tristan da Cunha
G220 V
240 V
400 V50 Hz
(French)C, E220 V380 V60 Hz
(Dutch)A, B120 V
127 V
220 V60 Hz127/220 V AC 60 Hz 3 phase service.
A, B, D, G230 V400 V60 Hz
A, B, G240 V400 V50 Hz
Saint Pierre and MiquelonC, E, F[44] 230 V400 V50 Hz
A, B, C, E, G, I, K230 V400 V50 Hz
SamoaIAS/NZS 3112230 V400 V50 Hz
San MarinoC, F, L230 V400 V50 Hz
C, F220 V400 V50 Hz
Saudi ArabiaGSASO 2203230 V400 V50 Hz
60 Hz
SenegalC, D, E, K230 V400 V50 Hz
SerbiaC
F
JUS N.E3.552
JUS N.E3.553
230 V400 V50 Hz
SeychellesG240 V240 V50 Hz
Sierra LeoneD, G230 V400 V50 Hz
SingaporeC
G
M
-
SS 145
SS 472
230 V400 V50 Hz

Type C requires adaptor. Hotel bathrooms may have shaver supply units (but usually not in homes).

Type M is used mainly for air conditioners, ovens, clothes dryers and some high-powered industrial/office equipment.

SlovakiaC, E, FSTN 34 4516230 V400 V50 Hz
SloveniaC, F230 V400 V50 Hz
Solomon IslandsG, IAS/NZS 3112230 V400 V50 Hz
SomaliaC, G220 V380 V50 Hz
South AfricaC, M, NSANS 164230 V400 V50 Hz
C, FKS C 8305220 V380 V60 Hz
SpainC, FUNE 20315230 V400 V50 HzType E is extremely rare, but it may appear in some buildings, such as the University Carlos III of Madrid. Almost every Spanish plug would work on Type E sockets.
Sri LankaD, G, MSLS 734230 V400 V50 HzOnly Type G permitted to be manufactured or imported from August 2017.[45]
SudanC, D, F, G230 V400 V50 Hz
SurinameA, B, C, F127 V220 V
400 V
60 HzType A and B tend to be very common because standard sockets can't accommodate such voltage.
SwedenC
F
IEC 60309
SS-EN 50075
SS 428 08 34
SS-EN 60309
230 V400 V50 HzBathrooms may have shaver supply units.
SwitzerlandC, JSN SEV 1011:2009[46] [47] 230 V400 V50 Hz
C, E, L220 V380 V50 Hz
A
B
CNS 690
CNS 15767
110 V220 V
380 V
60 HzSockets in older buildings are often unearthed and accept only Type A plugs.
TajikistanC, F, I220 V380 V50 Hz
D, G230 V415 V50 Hz
ThailandA, B, C, F220 V400 V50 HzThere is also a Thai national standard, TIS 166-2549 (sometimes known as Type O) which may not yet be in common use.[48] [49]
Timor-Leste (East Timor)C, E, F, I220 V380 V50 Hz
TogoC, E220 V380 V50 Hz
TongaIAS/NZS 3112230 V400 V50 Hz
Trinidad and TobagoA, B115 V115/230 V
230/400 V
60 Hz
TunisiaC, E230 V400 V50 Hz
TurkeyC, F230 V[50] 400 V50 Hz
TurkmenistanB, C, F220 V380 V50 Hz
TuvaluIAS/NZS 3112230 V400 V50 Hz
UgandaG240 V415 V50 Hz
UkraineC, F230 V[51] [52] 400 V50 Hz
United Arab EmiratesG[53] BS 1363230 V[54] 400 V50 HzBathrooms may have shaver supply units.
United KingdomG[55]
D, M[56]
BS 1363
BS 546
230 V415 V50 HzD mostly historical, nowadays used only for remotely switched lighting and similar. M historically used in domestic installations, now only for stage lighting (and there increasingly replaced with Ceeform). Bathrooms may have shaver supply units.
United StatesA
B
NEMA 14-30
NEMA 14-50
NEMA 1-15
NEMA 5-15
NEMA 14-30
NEMA 14-50
120 V
120 V
240 V
240 V
120/208 V
277/480 V
120/240 V
240 V
480 V
60 HzNEMA 5-20R outlets, which are similar to type B but have a T-shaped neutral slot, are sometimes used for higher current 120 V equipment (up to 20 A).
A
B
NEMA 1-15 P
NEMA 5-15 P
110 V190 V60 Hz
UruguayC, F, I, L230 V380 V50 HzType I was the main standard until the 1990s, and still appears in old installations.
UzbekistanC, E, F220 V380 V50 Hz
VanuatuC, G, IAS/NZS 3112230 V400 V50 Hz
A, B120 V
208 V
240 V
115/220 V
220/440 V
230/460 V[57]
60 Hz
A, B, C, D, F, GTCVN 6188-1220 V380 V50 HzMajority of households use unearthed hybrid sockets that accept type A and C plugs. Hybrid sockets that accept type A, B and C plugs are sometimes used in commercial installations. Type F plugs are frequently plugged into hybrid sockets, even though no earth contact is made.
YemenA, D, G240 V400 V50 Hz
ZambiaC, D, G230 V400 V50 Hz
ZimbabweD, G220 V415 V50 Hz

See also

Notes and References

  1. https://www.iec.ch/world-plugs World Plugs
  2. IEC/TR 60083 ed7.0: Plugs and socket-outlets for domestic and similar general use standardized in member countries of IEC. International Electrotechnical Commission, October 2015. This 421-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 was published on 29 October 2015.
  3. Web site: Three-phase electric power (industrial applications only) . Archived copy . 20 December 2022 . 20 December 2022 . https://web.archive.org/web/20221220100250/https://www.worldstandards.eu/electricity/three-phase-electric-power/ . live.
  4. Reglamentado por AEA 90364, IRAM 2001 & IEC 60083
  5. Web site: Electrical Plug/Outlet and Voltage Information for Bonaire. Adaptelec.com . 25 May 2018 . 12 June 2018 . https://web.archive.org/web/20180612142000/https://adaptelec.com/Country-Specific-Answers/Electrical-Plug-Outlet-and-Voltage-Information-for-Bonaire . live.
  6. Web site: F.A.Q. . CaribbeanClubBonaire.com . 25 May 2018 . 26 May 2018 . https://web.archive.org/web/20180526042027/http://www.caribbeanclubbonaire.com/faq/ . live.
  7. Web site: Technology on Bonaire . InfoBonaire.com . 25 May 2018 . 26 May 2018 . https://web.archive.org/web/20180526112756/https://www.infobonaire.com/technology/ . live.
  8. Web site: Electricity . CaribInn.com . 25 May 2018 . 12 June 2018 . https://web.archive.org/web/20180612142000/https://adaptelec.com/Country-Specific-Answers/Electrical-Plug-Outlet-and-Voltage-Information-for-Bonaire . dead.
  9. Book: . CSA Standard C22.2 No. 42-10: General use receptacles, attachment plugs, and similar wiring devices . Canadian Standards Association . Mississauga, Ontario . 2010 . 1.
  10. Book: . CAN3-C235-83: Preferred Voltage Levels for AC Systems, 0 to 50 000 V . Canadian Standards Association . Rexdale (Toronto), Ontario . 1983 . 9.
  11. Book: . C22.1-18: Canadian Electrical Code, Part 1 . Canadian Standards Association . Toronto, Ontario . 2018 . 243.
  12. Web site: List of Voltages & Frequencies (Hz) Around the World . Archived copy . 20 December 2022 . 23 November 2022 . https://web.archive.org/web/20221123023304/https://www.generatorsource.com/Voltages_and_Hz_by_Country.aspx . live.
  13. Web site: Cuba: Electricity - TripAdvisor . 10 June 2018 . 12 June 2018 . https://web.archive.org/web/20180612141914/https://www.tripadvisor.ca/Travel-g147270-c104286/Cuba:Caribbean:Electricity.html . live.
  14. Web site: Curaçao Utilities . Curaçao Tourist Board . 28 June 2017 . 12 June 2018 . https://web.archive.org/web/20180612163436/https://www.curacao.com/en/directory/plan/local-services/utilities/ . live.
  15. Confirmed 127V by looking at Aqualetric residential electricity meter
  16. Web site: Do I need special plugs/adaptors for my devices in Curaçao? . 17 September 2021 . 17 September 2021 . https://web.archive.org/web/20210917191123/https://www.curacao.com/en/questions/electricity/do-i-need-special-plugs-adaptors-for-my-devices-in-curacao . live.
  17. Web site: DS 60884-2-D1:2011 - Plugs and socket-outlets for household and similar purposes - Requirements for Danish systems . webshop.ds.dk . Dansk Standard . 8 January 2014 . 8 January 2014 . https://web.archive.org/web/20140108220745/http://webshop.ds.dk/groupproduct/18331/M256855/29-electrical-engineering-29-120-electrical-accessories-29-120-30-plugs-socket-outlets-couplers/ds-60884-2-d12011.aspx . live.
  18. Web site: Calculez votre consommation . fr . EDT ENGIE . https://web.archive.org/web/20200202000627/https://www.edt.pf/?uuid=1a11fad7-a98f-4899-bb0c-e382d432848d&groupId=10156 . 2 February 2020 . page 10, article 9.
  19. http://www.gplinc.net/about/history History of Guyana Power and Light
  20. http://www.stabroeknews.com/2009/news/local/07/10/gpl-converting-parts-of-city-to-60-hz/ GPL Converting Parts of the City to 60 Hz, retrieved 2009 July 31
  21. Web site: Code of Practice for the Electricity (Wiring) Regulations . . 28 May 2016 . 221 . 25 October 2018 . https://web.archive.org/web/20181025114906/https://www.emsd.gov.hk/filemanager/en/content_443/COP_E_2015.pdf . live.
  22. October 2005. IS 1293 - Indian Standard - Plugs and socket-outlets of related voltage up to and including 250 volts and rated current up to and including 16 Amperes -- Specification . Bureau of Indian Standards.
  23. Web site: IEC World Plugs . IEC World Plugs . International Electrotechnical Commission . 30 April 2021 . 10 October 2018 . https://web.archive.org/web/20181010204753/https://www.iec.ch/worldplugs/ . live.
  24. Web site: National Electrical Code 2011 . Bureau of Indian Standards . 30 December 2021 . 30 December 2021 . https://web.archive.org/web/20211230082443/https://law.resource.org/pub/in/bis/S05/is.sp.30.2011.pdf . live.
  25. Web site: Power plug & outlet Type D . 2023-05-09 . WorldStandards . en-GB.
  26. Book: Bureau of Indian Standards . IS 1293: Plugs and socket- outlets of rated voltage up to and including 250 volts and rated current up to 16 amperes . 2005 . Public.Resource.Org . English.
  27. Web site: Information to Industry regarding implementation of IS 1293 . Bureau of Indian Standards.
  28. Web site: 2020-12-23 . New version of IS standard for plugs and sockets . 2023-05-09 . India Certification – Your expert for India Certifications . en-US.
  29. Web site: IS 1293: What are the different kinds of Indian electrical sockets? · Sid Verma . 2023-05-09 . sidverma.io.
  30. News: 2015-04-21 . Department of Electronics and IT upset with BIS's abrupt enforcing of technical standards . The Economic Times . 2023-05-09 . 0013-0389.
  31. Web site: Agarwal . Anil . S.O. 2166(E) . DPIIT - Government of India.
  32. Web site: Persyaratan Umum Instalasi Listrik (PUIL) 2011, Amandemen 1, 2016 . . Jakarta, Indonesia . 21 September 2016 . 2024-06-12 . https://web.archive.org/web/20240612020608/https://gatrik.esdm.go.id/frontend/download_index/?kode_category=buku_puil . 12 June 2024 . live . id.
  33. I.S. 401, "Safety requirements for rewirable and non-rewirable 13A fused plugs for normal and rough use having insulating sleeves on line and neutral pins", NSAI (National Standards Authority of Ireland), (1997), Dublin
  34. Web site: MilitaryINSTALLATIONS - U.S. Department of Defense . MC&FP . Military Community Outreach . www.militaryinstallations.dod.mil . en-us . 2018-07-13 . 13 July 2018 . https://web.archive.org/web/20180713104730/http://www.militaryinstallations.dod.mil/MOS/f?p=132:CONTENT:0::NO::P4_INST_ID,P4_INST_TYPE:2530,INSTALLATION . dead.
  35. Web site: Standard Conditions of Supply of Electricity . 2022-12-20 . 21 December 2022 . https://web.archive.org/web/20221221132054/https://www.cem-macau.com/uploads/pdf_Supply_Elec2009_56f0d4116d.pdf . live.
  36. https://web.archive.org/web/20150107141425/http://www.st.gov.my/index.php/policies/standards/electrical-equipment/8-policies/155-plug-top-plug-15a-and-below.html Plug Top/Plug (15 A and below) -Energy Commission of Malaysia
  37. Web site: Guidelines For Electrical Wiring In Residential Buildings . 2008 . . 30 October 2013 . 10 October 2018 . https://web.archive.org/web/20181010204920/https://www.st.gov.my/images/article/polisi/guidelines/guidelines%20for%20electrical%20wiring%20in%20residential%20buildings%20.pdf . live.
  38. https://www.st.gov.my/ms/web/general/details/144 Voltan Nominal
  39. http://www.st.gov.my/index.php/policies/standards/electrical-equipment/8-policies/162-socket-outlet-15a-and-below.html Socket Outlet (15 A and below)
  40. Web site: MEM recomienda qué tipo de tomacorrientes se deben utilizar . 2016-01-24 . Diario Correo . es . 2019-08-26 . 29 March 2019 . https://web.archive.org/web/20190329002707/https://diariocorreo.pe/peru/mem-recomienda-que-tipo-de-tomacorrientes-se-deben-utilizar-648835/ . live.
  41. Web site: Philippine Electrical Code, section 2.20.1.5 (a) . 28 March 2017 . 29 March 2017 . https://web.archive.org/web/20170329140800/https://www.pdf-archive.com/2016/06/03/philippine-electrical-code/philippine-electrical-code.pdf . live.
  42. Web site: Standard Voltages . docs.cntd.ru . 11 August 2014 . 21 September 2018 . https://web.archive.org/web/20180921103941/http://docs.cntd.ru/document/gost-29322-92 . live. Document gost-29322-92 via Google Translate: "The nominal voltages of the existing 220/380 and 240/415 V networks should be gradually changed to the recommended value of 230/400 V. Until 2003, as a first stage, power supply companies in countries with a 220/380 V network should lead the voltage to The value of 230/400 V (GOST 29322-92 (IEC 38-83) Standard voltage%). Electricity supply companies in regions with 240/415 V network should also bring this voltage to the value 230/400 V (GOST 29322-92 (IEC 38-83) Standard voltage%). After 2003, the range of 230/400 V ± 10% should be reached. Then, the issue of reducing the limits will be considered."
  43. http://elec.ru/library/gosts_e71/gost_7396_1-89.pdf ГОСТ 7396.1–89 - Plugs (Electrical) and socket-outlets for domestic and similar general use. Standards.
  44. Web site: Before your stay . live . 2022-03-01 . Tourism Office of Saint Pierre et Miquelon . 18 January 2022 . https://web.archive.org/web/20220118215551/http://www.spm-tourisme.fr/1/useful-info/before-your-stay/.
  45. New standards for 13A plugs and socket outlets manufactures & importers . 13 June 2018 . . 17 April 2019 . 31 March 2018 . https://web.archive.org/web/20180331182421/http://www.pucsl.gov.lk/english/news/press-release-new-standards-for-13a-plugs-and-socket-outlets-manufactures-importers/ . live.
  46. Web site: Information SEV 1011 – power socket/plug/connector . https://web.archive.org/web/20120425070657/http://www.esti.admin.ch/files/elektrische_erzeugnisse/Info_SEV1011_de-fr-it-en.pdf . dead . 25 April 2012 . Federal Inspectorate for Heavy Current Installations ESTI, Swiss Confederation . 1 August 2011 . PDF . esti.admin.ch . 2014-08-22.
  47. Web site: New standard for plugs in Switzerland starting from 2013 . Federal Inspectorate for Heavy Current Installations ESTI, Swiss Confederation . 13 May 2011 . PDF . 2014-08-22 . 26 May 2013 . https://web.archive.org/web/20130526053647/http://www.biaonline.com/catalog/pdfs/09/0911.pdf . live.
  48. https://web.archive.org/web/20160707011303/https://law.resource.org/pub/th/ibr/th.cs.166.e.2549.pdf TIS 166-2549 (2006): Thai Industrial Standards for Plugs and socket-outlets for household and similar purposes: plugs and socket-outlets with rated voltage not exceeding 250 V
  49. https://web.archive.org/web/20120426001040/http://app.tisi.go.th/notices/pdf/TIS166-2549.pdf TIS 166-2549 (2006): Thai Industrial Standard for Plugs and socket-outlets for household and similar purposes: plugs and socket-outlets with rated voltage not exceeding 250 V
  50. Web site: Elektronik Elektrik Sayaçlari Teknik Şartnamesi . live . 16 September 2021 . 16 September 2021 . https://web.archive.org/web/20210916131856/https://www.tedas.gov.tr/sx.web.docs/tedas/tedas_arge/docs/sartnameler/tedas_arge/TEDA%C5%9E-MLZ%202017-062%20Elektronik%20Elektrik%20Saya%C3%A7lar%C4%B1%20Teknik%20%C5%9Eartnamesi%20(2019).pdf.
  51. Web site: ДСТУ ЕN 50160:2014 . 11 March 2020 . 16 May 2021 . https://web.archive.org/web/20210516053837/https://www.en.lg.ua/images/stories/2019/standart-yakosti.pdf . live.
  52. Temporarily the nominal voltage in the low-voltage network is 220V
  53. Book: The Electricity Wiring Regulations (2020) . Abu Dhabi Department of Energy . 51 . https://web.archive.org/web/20221101155040/https://www.doe.gov.ae/-/media/Project/DOE/Department-Of-Energy/Media-Center-Publications/EWR-2020-EN-V8-B-Online.pdf . 1 November 2022.
  54. Book: The Electricity Supply Regulations (2020) . Abu Dhabi Department of Energy . 2020 . 18 . https://web.archive.org/web/20221101150908/https://www.doe.gov.ae/-/media/Project/DOE/Department-Of-Energy/Media-Center-Publications/Regulations/English/ESR2020EditionPublication.pdf . 1 November 2022.
  55. Web site: The Origin of the BS 1363 Plug and Socket-Outlet System . Malcolm . Mullins . IEE Wiring Matters . Spring 2006 . . 2016-10-16 . https://web.archive.org/web/20160303213209/http://electrical.theiet.org/wiring-matters/18/plug-origin.cfm?type=pdf . 3 March 2016 . dead.
  56. Web site: Museum of Plugs and Sockets: BS 546 plugs and sockets . 2023-01-06 . www.plugsocketmuseum.nl . 30 September 2022 . https://web.archive.org/web/20220930215252/https://plugsocketmuseum.nl/OldBritish1.html . live.
  57. Web site: International Mains Voltages . International Mains Voltages - Pooley Inc. . SEW Eurodrive . 15 January 2020 . 6 May 2020 . https://web.archive.org/web/20200506192743/https://www.pooleyinc.com/pdf/SEW%20Voltages%20of%20the%20World.pdf . live.