# List of railway electrification systems

This is a list of the power supply systems that are, or have been, used for railway electrification.
Note that the voltages are nominal and vary depending on load and distance from the substation.
As of 2023 many trams and trains use on-board solid-state electronics to convert these supplies to run three-phase AC traction motors.
Tram electrification systems are listed here.

## Key to the tables below

* Volts: voltage or volt
* Current:
** DC = direct current
** # Hz = frequency in hertz (alternating current (AC))
*** AC supplies are usually single-phase (1φ) except where marked three-phase (3φ).
* Conductors:
** overhead line or
** conductor rail, usually a third rail to one side of the running rails. Conductor rail can be:
*** top contact: oldest, least safe, most affected by ice, snow, rain and leaves. Protection boards are installed on most top contact systems, which increases safety and reduces these affections.
*** side contact: newer, safer, less affected by ice, snow, rain and leaves
*** bottom contact: newest, safest, least affected by ice, snow, rain and leaves
* Red background indicates voltages no longer in use on the indicated location

## Systems using standard voltages

Voltages are defined by two standards: BS EN 50163 and IEC 60850.

### Overhead systems
#### 600 V DC

| Country | Location | Name of system | Notes |
| Worldwide | Worldwide | Many tram systems | This voltage is mostly used by older tram systems worldwide but by a few modern ones as well. See List of tram systems by gauge and electrification. |
| Germany | Trossingen | Trossingen Railway | |
| Hungary | Budapest | Budapest Metro | Line M1 |
| Japan | Chōshi, Chiba | Chōshi Electric Railway | |
| Japan | Kyoto, Kyoto | Eizan Electric Railway | |
| Japan | Kanagawa | Enoshima Electric Railway | |
| Japan | Matsuyama, Ehime | Iyotetsu Takahama Line | |
| Japan | Shizuoka, Shizuoka | Shizuoka Railway | |
| Romania | Sibiu county | Sibiu-Rășinari Narrow Gauge Railway | Part of the former Sibiu tram line |
| Spain | Madrid | Madrid Metro | Lines 1, 4, 5, 6 and 9. In process to be converted to 1500 V |
| United Kingdom | Crich, England | National Tramway Museum | |
| United States | Boston | MBTA subway | Green and Mattapan Lines, the at-grade section of Blue Line northeast of Airport station |
| United States | Cleveland | RTA Rapid Transit | Red Line |
| United States | San Diego | San Diego Trolley | |
| United States | Iowa | Iowa Traction Railway |

#### 750 V DC

| Country | Location | Name of system | Notes |
| Worldwide | Worldwide | Many tram systems | This voltage is used for most modern tram and light rail systems. See List of tram systems by gauge and electrification |
| Austria | Upper Austria | Local lines of Stern & Hafferl | Also listed as having 1500 V and 600 V lines |
| Austria Switzerland | Rhine / Lake Constance | Internationale Rheinregulierungsbahn | Construction railway for the regulation works of the river Rhine near its outfall into Lake Constance, now preserved. The river forms the border between Austria and Switzerland, and the railway operated in both countries. |
| Germany | Karlsruhe to Bad Herrenalb with a branch to Ittersbach | Albtalbahn | Railway of the Upper Rhine |
| Hong Kong | Hong Kong | MTR | MTR Light Rail |
| India | Bengaluru | Namma Metro | |
| India | Pune | Pune Metro Line 3 | |
| India | Kolkata | Kolkata Metro | |
| India | Ahmedabad | Ahmedabad Metro | |
| Japan | Hamamatsu, Shizuoka | Enshū Railway | |
| Japan | Hakone, Kanagawa | Hakone Tozan Railway Line | Between Hakone-Yumoto and Gōra |
| Japan | Ehime | Iyotetsu Yokogawara Line and Gunchū Line | |
| Japan | Yokkaichi, Mie | Yokkaichi Asunarou Railway Utsube Line, Hachiōji Line | |
| Japan | Mie | Sangi Railway Hokusei Line | |
| Mexico | Mexico City | STC | Line A |
| Netherlands | The Hague, Zoetermeer, Rotterdam and adjacent cities | Randstadrail | |
| Netherlands | Rotterdam | Rotterdam Metro | North of Capelsebrug station overhead wires |
| Philippines | Metro Manila | Manila LRT Line 1 (Manila Light Rail Transit System) | Between Dr. Santos and Fernando Poe Jr. |
| Philippines | Metro Manila | Manila MRT Line 3 (Manila Metro Rail Transit System) | Between North Avenue and Taft Avenue |
| Switzerland | Canton of Aargau | Menziken–Aarau–Schöftland railway line | |
| Republic of China (Taiwan) | New Taipei | New Taipei Metro: all Light Rail lines | |
| Turkey | Adana | Adana Metro | |
| Turkey | Eskişehir | EsTram | |
| Turkey | Istanbul | Istanbul Metro | Line M1 and M5 |
| United Kingdom | Manchester | Manchester Metrolink | All lines |

#### 1,200 V DC

| Country | Location | Name of system | Notes |
| Cuba | Havana – Matanzas and branches | Ferrocarriles Nacionales de Cuba | Originally (and still known as) the Hershey Electric Railway |
| Germany | Lusatia | | 900 mm (2 ft 11+7⁄16 in) gauge mining railways in the lignite district |
| Spain | Barcelona, Catalonia | Barcelona Metro | Uses an overhead conductor rail/beam system |
| Spain | Palma – Sóller, Majorca | Sóller Railway | |
| Switzerland | Canton of Bern / canton of Solothurn | Aare Seeland mobil (ASm) | |
| Switzerland | Dietikon, canton of Zürich – Wohlen, canton of Aargau | Bremgarten-Dietikon-Bahn | |
| Switzerland | Zürich – Esslingen, canton of Zürich | Forchbahn | Forchbahn proper only; Forchbahn trains access their Zürich terminus via the Zürich tram network, which is electrified at 600 V DC. The rolling stock is equipped to run off both voltages. |
| Switzerland | Frauenfeld, canton of Thurgau – Wil, canton of St. Gallen | Frauenfeld-Wil-Bahn | |
| Switzerland | Meiringen – Innertkirchen, canton of Bern | Meiringen–Innertkirchen Bahn | |
| United States | Baltimore–Annapolis, Maryland | Baltimore and Annapolis Railroad | 1914–1950 |
| United States | Los Angeles – Inland Empire, California | Pacific Electric Upland–San Bernardino | Operated 1914–1950. 600 V in city limits |
| United States | California | Sacramento Northern Railway | Operated 1910–1936. Converted to 1,500 V. The southern division was built by the Oakland, Antioch and Eastern Railway. |
| United States | East Bay, California | East Bay Electric Lines | 1911–1941 |
| United States | Oregon | Oregon Electric Railway | 1912–1945 |

#### 1,500 V DC

| Country | Location | Name of system | Notes |
| Argentina | Buenos Aires | Buenos Aires Metro | Lines A, C, D, E and H |
| Argentina | Buenos Aires | Tren de la Costa | Suburban line |
| Australia | Melbourne | Melbourne Suburban Railways | |
| Australia | Regional New South Wales | NSW TrainLink Intercity | Newcastle and Central Coast, Blue Mountains to Lithgow and South Coast to Kiama |
| Australia | Sydney | Sydney Trains | |
| Australia | Sydney | Sydney Metro | Lines partially converted from Sydney Trains only, completely new lines will use 25 kV 50 Hz AC |
| Bangladesh | Dhaka | Dhaka Metro Rail | MRT Line 6 (Dhaka Metro) |
| Brazil | São Paulo | São Paulo Metro | Lines 4 and 5 |
| Bulgaria | Sofia | Sofia Metro | Line 3 Gorna Banya – Hadzhi Dimitar |
| Canada | Montreal | Réseau express métropolitain | Incl. Deux-Montagnes line that was built by CNoR in 1918 as 2400 V DC, converted to 3000 V DC in the 1980s, converted to 25 kV 60 Hz in 1995 by the MTQ, being converted to light-metro standard and 1500 V DC |
| Canada | Ottawa | O-Train | Confederation Line only; the Trillium Line is diesel LRT. |
| China | Beijing | Beijing Subway | Lines 6, 14 and 16 |
| China | Changchun | Changchun Rail Transit | Lines 1 and 2 |
| China | Changsha | Changsha Metro | |
| China | Changzhou | Changzhou Metro | |
| China | Chengdu | Chengdu Metro | Except lines 17, 18 and 19 |
| China | Chongqing | Chongqing Rail Transit | Lines 1, 4, 5, 6, 10 and Loop Line |
| China | Dalian | Dalian Metro | |
| China | Dongguan | Dongguan Rail Transit | |
| China | Fushun | Fushun Electric Railway | |
| China | Fuzhou | Fuzhou Metro | |
| China | Guangzhou | Guangzhou Metro | Except Lines 4, 5, 6, 14 and 21, but overhead wires installed in depots. |
| China | Guiyang | Guiyang Metro | |
| China | Haining | Hangzhou-Haining Intercity Rail | |
| China | Hangzhou | Hangzhou Metro | |
| China | Harbin | Harbin Metro | |
| China | Hefei | Hefei Metro | |
| China | Hohhot | Hohhot Metro | |
| China | Jinan | Jinan Metro | |
| China | Lanzhou | Lanzhou Metro | |
| China | Nanchang | Nanchang Metro | |
| China | Nanjing | Nanjing Metro | |
| China | Nanning | Nanning Metro | |
| China | Ningbo | Ningbo Rail Transit | Line 4 uses third rail for returning current |
| China | Shanghai | Shanghai Metro | Except Lines 16 and 17, but overhead wires installed in the depot for line 16. |
| China | Shaoxing | Shaoxing Metro | |
| China | Shenyang | Shenyang Metro | |
| China | Shenzhen | Shenzhen Metro | Except Lines 3 and 6, but overhead wires installed in the depot for line 6. |
| China | Shijiazhuang | Shijiazhuang Metro | |
| China | Suzhou | Suzhou Metro | |
| China | Tianjin | Tianjin Metro | Lines 5, 6 and 9 only |
| China | Ürümqi | Ürümqi Metro | |
| China | Wuhan | Wuhan Metro | Line 6 only |
| China | Xi’an | Xi'an Metro | |
| China | Xiamen | Xiamen Metro | |
| China | Xuzhou | Xuzhou Metro | |
| China | Zhengzhou | Zhengzhou Metro | |
| Colombia | Medellín | Medellín Metro | Lines A and B |
| Peru | Lima | Lima Metro |
| Czech Republic | Tábor – Bechyně | Správa železnic | Tábor – Bechyně line only (24 km, built in 1903) |
| Dominican Republic | Santo Domingo | Santo Domingo Metro | |
| Egypt | Cairo | Cairo Metro | Line 1 |
| France | Société Nationale des Chemins de fer (SNCF) | Société Nationale des Chemins de fer (SNCF) | 25 kV AC used on new high speed lines (TGV) and in the north (see below) |
| Hong Kong | Hong Kong | Mass Transit Railway | Except East Rail line and Tuen Ma line which use 25 kV 50 Hz AC (see below) and the light rail which uses 750 V DC |
| Hungary | Budapest | Budapest Cog-wheel Railway | Converted from 550 V DC (city trams nominal voltage at that time) during the 1973 reconstruction. |
| Indonesia | Jakarta | KRL Jabodetabek Jakarta MRT | |
| Indonesia | Yogyakarta-Solo | KRL Commuterline Yogyakarta–Solo | |
| Ireland | Dublin | Dublin Area Rapid Transit | |
| Israel | Tel Aviv | Tel Aviv Light Rail | Red Line runs partially as a premetro |
| Italy | Rome | Rome Metro | Line A, Line B, Line Roma-Ostia Lido |
| Japan | Japan Railways (JR) lines | Japan Railways (JR) lines | Most electrified lines in Kantō, Chūbu, Kansai, Chūgoku, and Shikoku (except Shinkansen and Hokuriku region) |
| Japan | Most private railway lines | Most private railway lines | See Railway electrification in Japan for more details including exceptions |
| See Railway electrification in Japan for more details including exceptions ||
| South Korea | Seoul National Capital Area | Seoul Subway | Except Korail Subway Line (except Line 3) (see below) |
| South Korea | Busan | Busan Subway | |
| South Korea | Daegu | Daegu Subway | |
| South Korea | Daejeon | Daejeon Subway | |
| South Korea | Gwangju | Gwangju Subway | |
| South Korea | Incheon | Incheon Subway Line 1 | |
| Mexico | Guadalajara | SITEUR | Line 3 |
| Mexico | Mexico City | STC | Line 12 |
| Mexico | Monterrey | Sistema de Transporte Colectivo Metrorrey | |
| Netherlands | Nederlandse Spoorwegen – Dutch Railways (NS) | Nederlandse Spoorwegen – Dutch Railways (NS) | 25 kV AC used on high speed lines and freight line Betuweroute (see below); The existing 1500V DC lines might be converted to 3kV DC. |
| New Zealand | Wellington | Wellington suburban | Except Wairarapa Line beyond Upper Hutt. Since 2011, the nominal voltage was 1600 V but with the same tolerances as 1500 V (i.e. 1300–1800 V), making it backwards-compatible with 1500 V rolling stock. Since May 2016 the operating voltage was increased to 1700 V DC following the full introduction of the Matangi EMUs. |
| Philippines | Metro Manila | Manila MRT | Makati Intra-city Subway (Line 5) and Metro Manila Subway (Line 9) only. Line 7 uses 750 V DC third rail. |
| Philippines | Metro Manila Rizal | Manila LRT | Line 2 only. Line 1 uses 750 V DC. |
| Philippines | Metro Manila Central Luzon Laguna | Philippine National Railways | North–South Commuter Railway |
| Portugal | Lisbon, Oeiras and Cascais | Linha de Cascais | To be converted to 25kV AC. |
| Singapore | Singapore | Mass Rapid Transit | North East Line, operated by SBS Transit |
| Slovakia | Tatra Mountains in the area of Poprad | Tatra Electric Railway | |
| Spain | Catalonia | Ferrocarrils de la Generalitat de Catalunya | |
| Spain | Madrid | ADIF | Only Cercedilla-Cotos line |
| Spain | Mallorca | Serveis Ferroviaris de Mallorca | |
| Spain | North coast (Asturias-Leon-Cantabria-Basque Country) | FEVE | |
| Spain | Basque Country | Euskotren Trena | |
| Spain | Valencian Community | Ferrocarrils de la Generalitat Valenciana | |
| Sweden | Stockholm | Roslagsbanan | |
| Switzerland | Aigle – Leysin, canton of Vaud | Chemin de fer Aigle–Leysin (AL) | |
| Switzerland | Aigle, Vaud – Champéry, canton of Valais | Chemin de fer Aigle–Ollon–Monthey–Champéry (AOMC) | |
| Switzerland | Aigle – Les Diablerets, canton of Vaud | Chemin de fer Aigle–Sépey–Diablerets (ASD) | |
| Switzerland | Interlaken – Lauterbrunnen / Grindelwald, canton of Bern | Berner Oberland Bahn (BOB) | |
| Switzerland | Canton of Jura | Chemins de fer du Jura (CJ) | Metre gauge lines only |
| Switzerland | Lausanne – Bercher, canton of Vaud | Chemin de fer Lausanne–Échallens–Bercher (LEB) | |
| Switzerland | Nyon – La Cure, canton of Vaud | Chemin de fer Nyon-St-Cergue-Morez (NStCNM) | Converted in the 1980s from 2200 V DC |
| Switzerland | Vitznau / Goldau – Rigi | Rigi Bahnen (VRB/ARB) | |
| Switzerland | Wilderswil – Schynige Platte, canton of Bern | Schynige Platte Bahn (SPB) | |
| Switzerland | Liestal – Waldenburg, canton of Basel-Country | Waldenburgerbahn (WB) | |
| Switzerland | Lauterbrunnen – Grindelwald, canton of Bern | Wengernalpbahn (WAB) | |
| Turkey | Bursa | Bursaray | |
| Turkey | Istanbul | Istanbul Metro | Line M3, M4, M7, M8, M9 and M11 |
| United Kingdom | Newcastle, Sunderland, Gateshead and Tyneside | Tyne & Wear Metro | Light rail |
| United States | Chicago | Metra Electric District | |
| United States | California | Sacramento Northern Railway | operated 1936–c. 1960s |
| United States | Maryland | Purple Line | Light rail under construction |
| United States | Northern Indiana & Chicago | South Shore Line | |
| United States | Oregon | Southern Pacific Red Electric Lines | 1914–1929 |
| United States | Seattle | Central Link | Light rail |

#### 3 kV DC

| Country | Location | Name of system | Note |
| Belgium | Belgium National Railways (SNCB) | Belgium National Railways (SNCB) | National standard. 25 kV AC used on high speed lines and some lines in the south (see below). |
| Brazil | Rio de Janeiro | SuperVia Trens Urbanos | |
| Brazil | São Paulo | São Paulo Metropolitan Trains | |
| Chile | Empresa de los Ferrocarriles del Estado | Empresa de los Ferrocarriles del Estado | |
| Czech Republic | Správa železnic | Správa železnic | Northern part of network only (approx. the Děčín – Praha – Ostrava route). The system change stations are Kadaň-Prunéřov, Beroun, Benešov u Prahy, Kutná Hora hl.n., Svitavy, Nezamyslice, Nedakonice. The southern part uses 25 kV 50 Hz (see below). The 3 kV system is to be phased out in favour of 25 kV AC. |
| Estonia | Tallinn | Elron | Commuter rail only |
| Georgia | Georgian Railways | Georgian Railways | In fact 3,300 V |
| Italy | Rete Ferroviaria Italiana | Rete Ferroviaria Italiana | 25 kV AC used on new high speed lines (see below) |
| North Korea | Korean State Railway | Korean State Railway | National standard |
| Latvia | Latvian Railways | Latvian Railways | Commuter rail only. |
| Morocco | ONCF | ONCF | National standard |
| Netherlands | ProRail | ProRail | Planned |
| Poland | Polish State Railways | Polish State Railways | National standard. Planned high speed lines in Poland will use 25 kV AC |
| Poland | Warsaw and suburbs | Warszawska Kolej Dojazdowa | 600 V DC until 27 May 2016 |
| Russia | Russian Railways | Russian Railways | New electrification use only 25 kV AC (see below), except Moscow Central Circle and other interconnection lines in Moscow, and 2 interconnection lines (Veymarn line and Kamennogorsk line) in St. Petersburg. Sverdlovsk railway and West Siberian railway to be converted to 25 kV AC. |
| Slovakia | Slovak Republic Railways (ŽSR) | Slovak Republic Railways (ŽSR) | Northern main line (connected to Czech Republic and Poland) and eastern lines (around Košice and Prešov), conversion to 25 kV AC planned, and the broad gauge line between Košice and the Ukraine border (it will remain 3 kV until new broad gauge line construction, then convert to 25 kV AC), planned new broad gauge line is supposed to use 25 kV AC. Currently, the part north and east of the station Púchov uses 3 kV DC, the rest uses 25 kV 50 Hz (see below). |
| Slovenia | Slovenian Railways | Slovenian Railways | National standard |
| South Africa | Transnet Freight Rail; Metrorail | Transnet Freight Rail; Metrorail | National standard; also 25 kV AC (see below) and 50 kV AC used |
| Spain | Administrador de Infraestructuras Ferroviarias | Administrador de Infraestructuras Ferroviarias | 25 kV AC used on high speed lines (AVE) (see below) |
| Ukraine | Ukrainian Railways | Ukrainian Railways | In east (Donetsk industrial zone), in west (west from L'viv – connecting to Slovakia and Poland), to be converted to 25 kV AC (see below) |

#### 15 kV AC, 16+2⁄3 Hz / 16.7 Hz

| Country | Location | Name of system | Notes |
| Austria | ÖBB | ÖBB | National standard. Planned new high speed lines will near the border use 25 kV AC: Innsbruck-Italy and broad gauge to Ukraine. Austrian National Railways also operate in the small country of Liechtenstein, which also uses 15 kV AC. |
| Czech Republic | Znojmo - Retz | Správa železnic | Isolated section near border with Austria |
| Germany | Deutsche Bahn - German National Railways (DB) | Deutsche Bahn - German National Railways (DB) | National standard |
| Norway | Norwegian National Rail Administration | Norwegian National Rail Administration | | National standard |
| Sweden | Swedish Transport Administration | Swedish Transport Administration | | National standard |
| Switzerland | Canton of Bern | BLS | |
| Switzerland | Central Switzerland and Bernese Highlands | Zentralbahn | |
| Switzerland | Canton of Vaud | Chemin de fer Bière-Apples-Morges (BAM) | |
| Switzerland | Canton of Zürich | Sihltal Zürich Uetliberg Bahn | |
| Switzerland | Swiss Federal Railways (SBB CFF FFS) | Swiss Federal Railways (SBB CFF FFS) | |

#### 25 kV AC, 50 Hz

| Country | Location | Name of system | Notes |
| Argentina | Buenos Aires | Roca Line | Constitución – Ezeiza Constitución – Alejandro Korn Constitución – Bosques Constitución – La Plata |
| Australia | Brisbane, North Coast line, Blackwater and Goonyella coal railways | Queensland Rail | |
| Australia | Perth | Transperth | |
| Australia | Adelaide | Adelaide Metro | Seaford/Flinders and Gawler lines electrified |
| Australia | Sydney | Sydney Metro | Completely new lines (Western Sydney Airport and Sydney Metro West) converted lines use 1500V DC |
| Belarus | | | National standard |
| Belgium | Belgium National Railways (NMBS/SNCB) | Belgium National Railways (NMBS/SNCB) | High-speed lines and some other lines. The rest of the network is 3 kV DC (see above) |
| Bosnia and Herzegovina | | | |
| Botswana | | | Proposed line to Namibia |
| Bulgaria | Bulgarian State Railways | Bulgarian State Railways | |
| China | China Railway | China Railway | National standard |
| China | Beijing | Beijing Subway | Daxing Airport Line only |
| China | Chengdu | Chengdu Metro | Lines 17, 18 and 19 only |
| China | Wenzhou | Wenzhou Rail Transit | |
| Croatia | Croatian Railways | Croatian Railways | Lines Zagreb-Rijeka and Rijeka-Šapjane formerly used 3kv DC traction |
| Czech Republic | Správa železnic | Správa železnic | Southern lines only (linking Karlovy Vary – Cheb – Plzeň – České Budějovice – Tábor – Jihlava – Brno – Břeclav – Slovakia), northern lines use 3 kV DC (see above) |
| Denmark | | Banedanmark | National standard, excluding Copenhagen S-train |
| Djibouti | Addis Ababa–Djibouti Railway | Ethiopian Railway Corporation | |
| Ethiopia | Addis Ababa–Djibouti Railway | Ethiopian Railway Corporation | |
| Finland | | | National standard |
| France | North and new lines | SNCF | A number of lines also electrified with 1.5 kV (see above) |
| Germany | Harz | Rübelandbahn | |
| Greece | Hellenic Railways Organisation | Hellenic Railways Organisation | National standard |
| Hong Kong | Kowloon, New Territories | MTR | East Rail and Tuen Ma lines |
| Hungary | Hungarian State Railways and Raaberbahn | Hungarian State Railways and Raaberbahn | |
| India | Indian Railways | Indian Railways | Entire IR network uses the current system since 2016. |
| India | Mumbai | Mumbai Suburban Railway | Conversion from 1.5 kV DC to the current system was completed in 2012 (for Western line) and 2016 (for Central line) respectively |
| India | Mumbai | Mumbai Metro (Line 1) | |
| India | Chennai (Madras) | Chennai Metro | |
| India | Delhi | Delhi Metro | |
| India | Hyderabad | Hyderabad Metro | |
| India | Pune | Pune Metro | |
| India | Nagpur | Nagpur Metro | |
| India | Jaipur | Jaipur Metro | |
| India | Lucknow | Lucknow Metro | |
| Iran | | | Planned |
| Israel | Israel Railways | Israel Railways | Construction contract awarded in December 2015. Initial test runs began December 2017. |
| Italy | Rete Ferroviaria Italiana (Italian Railways Network) | Rete Ferroviaria Italiana (Italian Railways Network) | New high-speed lines only, other lines use 3 kV DC (see above) |
| Japan | Kantō (northeast of Tokyo), Tōhoku, and Hokkaido regions | JR East Tohoku Shinkansen, Joetsu Shinkansen, and Hokuriku Shinkansen (sections between Tokyo – Karuizawa, and between Jōetsumyōkō – Itoigawa) JR Hokkaido Hokkaido Shinkansen | 25 kV AC 60 Hz in some areas (see below). |
| Kazakhstan | | | |
| Laos | Boten–Vientiane railway | | |
| Latvia | Latvian Railways | Latvian Railways | Eastern lines only (planned) |
| Lithuania | Kena — Kaunas and Lentvaris — Trakai | Lithuanian Railways (LG) | Electrification of Naujoji Vilnia – Kena — Gudogai (BCh) route for Vilnius – Minsk (Belarus) services is established on 2017. Further Kaunas – Klaipeda and Kaunas – Kybartai corridors electrification will follow projects. |
| Luxembourg | Chemins de fer luxembourgeois (CFL) | Chemins de fer luxembourgeois (CFL) | National standard |
| Malaysia | Padang Besar – KL Sentral – Gemas | KTM ETS (run through West Coast railway line), Keretapi Tanah Melayu Berhad | Under construction: Hat Yai (in Thailand) – Padang Besar (to be opened by 2020) and Gemas – Johor Bahru (to be opened by 2022) |
| Malaysia | Bukit Mertajam – Padang Regas and Butterworth – Padang Besar | KTM Komuter Northern Sector, Keretapi Tanah Melayu Berhad | |
| Malaysia | Batu Caves – Pulau Sebang/Tampin, Tanjung Malim – Port Klang and KL Sentral – Terminal Skypark | KTM Komuter Central Sector (Seremban Line, Port Klang Line and Skypark Link), Keretapi Tanah Melayu Berhad | |
| Malaysia | KL Sentral – KLIA2 | Express Rail Link (KLIA Ekspres and KLIA Transit) | |
| Montenegro | Belgrade–Bar railway and Nikšić–Podgorica railway | Railways of Montenegro | |
| Morocco | Kenitra–Tangier high-speed rail line | ONCF | Casablanca–Kenitra section of high-speed rail remains at 3 kV DC |
| Namibia | | | Proposed line to Botswana |
| Netherlands | HSL-Zuid high speed line and Betuweroute freight line | Nederlandse Spoorwegen | 1.5 kV DC used on the rest of the network (see above) |
| New Zealand | Auckland | Auckland suburban | 77 km between Swanson and Papakura; first service 28 April 2014 |
| New Zealand | Central North Island | North Island Main Trunk | 411 km between Palmerston North and Hamilton |
| North Macedonia | Makedonski Železnici | Makedonski Železnici | |
| Poland | Hrubieszów | Broad Gauge Metallurgy Line (LHS) | A section from the border to Hrubieszów will be electrified in conjunction with the electrification of the connecting border – Izov – Kovel line in Ukraine. The reminder sections will follow. |
| Portugal | Portuguese Railways (CP) | Portuguese Railways (CP) | Except the Linha de Cascais (1500 V DC) |
| Romania | Caile Ferate Romane | Caile Ferate Romane | |
| Russia | Russian Railways | Russian Railways | National standard used for new electrification; some areas still use 3 kV DC (see above) |
| Serbia | Serbian Railways | Serbian Railways | |
| Slovakia | Slovak Republic Railways (ŽSR) | Slovak Republic Railways (ŽSR) | South-western lines only (around Bratislava, Kuty, Trencin, Trnava, Nove Zamky, Zvolen) and the rest of the network (except narrow gauge lines), currently 3 kV DC, to follow (see above) |
| South Africa | Transnet Freight Rail, Gautrain | Transnet Freight Rail, Gautrain | Also 3 kV DC (see above) and 50 kV 50 Hz used. |
| Spain | ADIF Alta Velocidad | ADIF Alta Velocidad | High-speed lines only, other lines use 3 kV DC (see above) |
| Sweden | Malmö | Öresund Line | On the Öresund Bridge and short part of land. |
| Sweden | Haparanda | Haparanda Line broad gauge track | Only at the station near the border to Finland (with 1524mm gauge) |
| Turkey | Turkish State Railways (TCDD) | Turkish State Railways (TCDD) | National standard |
| Thailand | Bangkok | Suvarnabhumi Airport Link | |
| Tunisia | | | |
| Turkey | Turkish State Railways (TCDD) | Turkish State Railways (TCDD) | National standard |
| United Kingdom | Network Rail | Network Rail | Except Southern region and Merseyrail and Northern Ireland |
| Ukraine | Ukrainian Railways | Ukrainian Railways | National standard, in most of the west; also 3 kV DC in the east (see above) |
| Uzbekistan | | | |
| Zimbabwe | Gweru – Harare | National Railways of Zimbabwe (NRZ) | De-energised in 2008. May be renewed in the future. |

#### 25 kV AC, 60 Hz

| Country | Location | Name of system | Notes |
| Japan | Kantō (west of Tokyo), Chūbu, Kansai, Chūgoku, and Kyushu regions | Tōkaidō-Sanyō Shinkansen Hokuriku Shinkansen (sections between Karuizawa – Jōetsumyōkō, and between Itoigawa – Kanazawa) Kyushu Shinkansen Nishi Kyushu Shinkansen | 25 kV AC 50 Hz in eastern Japan (see above) |
| South Korea | Korail | Korail | All Korail freight/passenger lines except Seoul subway Line 3 which is 1.5 kV DC (see above) |
| South Korea | Seoul | Shinbundang line | |
| South Korea | Incheon, Seoul | A'REX | |
| Mexico | Greater Mexico City | Ferrocarril Suburbano de la Zona Metropolitana del Valle de México | |
| Mexico | Mexico Valley, Toluca Valley | El Insurgente | First section operating on 2023. Rest expected mid of 2024 |
| Mexico | Yucatán Peninsula | Tren Maya | Under construction. About 40% of the route to be electrified |
| Saudi Arabia | Hejaz region | Haramain High-Speed Railway | |
| Republic of China (Taiwan) | Taiwan Railways Administration | Taiwan Railways Administration | National standard |
| Republic of China (Taiwan) | Western Taiwan | Taiwan High Speed Rail | |
| United States | New Jersey | Morris & Essex Lines, New Jersey Transit | Converted from 3,000 V DC to 25 kV 60 Hz in 1984. |
| United States | Aberdeen-Matawan to Long Branch, New Jersey | North Jersey Coast Line, New Jersey Transit | Converted in 1978 from Pennsylvania Railroad 11 kV 25 Hz system to the 12.5 kV 25 Hz on the Rahway-Matawan ROW and 12.5 kV 60 Hz electrification extended to Long Branch in 1988. The Matawan-Long Branch voltage converted from 12.5 kV 60 Hz system to the 25 kV 60 Hz in 2002. |
| United States | New Haven to Boston | Northeast Corridor (NEC), Amtrak | Electrified in 2000; see Amtrak's 60 Hz traction power system |
| United States | Denver | Denver RTD | Opened in 2016; separate 750 V DC system for light rail |
| United States | Rancho Cucamonga to Las Vegas | Brightline West | Under construction, expected to be operational by 2027–28. |
| United States | California | California High-Speed Rail | Under construction between Merced and Bakersfield, set to begin operation in 2029–30. |
| United States | San Francisco Peninsula | Caltrain | Completed in 2024; see Caltrain Modernization Program |
| United States | New Mexico | Navajo Mine Railroad | |
| United States | Texas | Texas Utilities, Monticello & Martin Lake | see E25B and Internet reference |

### Conductor rail systems
#### 600 V DC conductor

All systems are third rail unless stated otherwise. Used by some older metros.
| Country | Location | Name of system | Notes |
| Argentina | Buenos Aires | Urquiza Line | Federico Lacroze-General Lemos |
| Canada | Toronto | Toronto subway | Only on subway lines |
| Greece | Athens | EIS/ISAP | used between 1904 and 1985 |
| Italy | Turin | Superga Rack Railway | |
| Japan | Tokyo | Tokyo Metro Ginza Line and Marunouchi Line | |
| Japan | Nagoya, Aichi | Nagoya Municipal Subway Higashiyama Line and Meijō Line | |
| Sweden | Stockholm | Stockholm Metro | 650 V, Green and Red Lines |
| United Kingdom | Glasgow | Glasgow Subway | |
| United States | Anaheim, California | Disneyland Monorail | |
| United States | Boston | Massachusetts Bay Transportation Authority | Red and Orange Lines, the subway part of the Blue Line southwest of Airport station |
| United States | Chicago | Chicago "L" | elevated and subway lines |
| United States | Staten Island | Staten Island Railway | |
| United States | New York City metro area | PATH | |
| United States | Philadelphia | Southeastern Pennsylvania Transportation Authority | Broad Street Line |
| United States | Bay Lake, Florida | Walt Disney World Monorail System | |
| United States | California | Sacramento Northern Railway | Used 1906–c. 1960s. The Northern subdivision was built by the Northern Electric Railway and operated with overhead wires in towns. |

#### 750 V DC conductor

Conductor rail systems have been separated into tables based on whether they are top, side or bottom contact. Used by most metros outside Asia and the former Eastern bloc.

##### Bottom contact

| Country | Location | Name of system | Notes |
| Algeria | Algiers | Algiers Metro | |
| Austria | Vienna | Vienna U-Bahn | |
| Brazil | São Paulo | São Paulo Metro | Except Lines 4 and 5 |
| China | Beijing | Beijing Subway | Capital Airport Line only |
| China | Kunming | Kunming Metro | Except Line 4 |
| China | Tianjin | Tianjin Metro | Lines 2 and 3 only |
| China | Wuhan | Wuhan Metro | Lines 1, 2, 3 and 4 only |
| Czech Republic | Prague | Prague Metro | |
| Denmark | Copenhagen | Copenhagen Metro | |
| Egypt | Cairo | Cairo Metro | Line 2 and Line 3 |
| Finland | Helsinki | Helsinki Metro | |
| Germany | Berlin | Berlin U-Bahn and Berlin S-Bahn | Lines from U5 to U9 (large profile). Negative polarity. |
| Germany | Hamburg | Hamburg U-Bahn | |
| Germany | Munich | Munich U-Bahn | |
| Germany | Nuremberg | Nuremberg U-Bahn | |
| India | Bangalore | Namma Metro | |
| India | Kochi | Kochi Metro | |
| India | Ahmedabad | Ahmedabad Metro | |
| India | Kanpur | Kanpur Metro | |
| India | Gurgaon | Rapid Metro Gurgaon | |
| India | Kolkata | Kolkata Metro | |
| South Korea | Busan | Busan-Gimhae Light Rail Transit | |
| Malaysia | Klang Valley | Klang Valley Integrated Transit System LRT Ampang and Sri Petaling lines, MRT Kajang and Putrajaya lines, and KL Monorail | to be used on LRT Shah Alam Line |
| Netherlands | Amsterdam | Amsterdam Metro | including line 51 north of Station Zuid |
| Netherlands | Rotterdam | Rotterdam Metro | North of Capelsebrug station overhead wires |
| Norway | Oslo | Oslo T-bane | |
| Poland | Warsaw | Warsaw Metro | |
| Romania | Bucharest | Bucharest Metro | |
| Singapore | Singapore | Mass Rapid Transit | North–South, East–West, Circle and Thomson-East Coast lines operated by SMRT Trains Downtown line operated by SBS Transit |
| Republic of China (Taiwan) | Kaohsiung | Kaohsiung Metro | |
| Republic of China (Taiwan) | Taipei | Taipei Metro | |
| Republic of China (Taiwan) | Taoyuan–Taipei | Taoyuan Metro | |
| Turkey | Ankara | Ankara Metro | |
| Turkey | Istanbul | Istanbul Metro | Lines M2 and M6 only |
| Turkey | İzmir | İzmir Metro | |
| United Kingdom | London | Docklands Light Railway | |
| United States | New York City | Metro-North Railroad | |

##### Side contact

| Country | Location | Name of system | Notes |
| Canada | Montreal | Montreal Metro | (guide bars, see DC, four-rail below) |
| China | Shanghai | Shanghai Metro – Pujiang line | Central guide rail for rubber-tyred Bombardier Innovia APM 300 |
| Chile | Santiago | Santiago Metro | |
| France | Paris | Paris Métro (Rubber tired) | Positive (and sometimes negative) polarity on guide bars. See DC, four-rail below. |
| France | Lyon | Lyon Métro | Positive (and sometimes negative) polarity on guide bars. See DC, four-rail below. |
| France | Marseille | Marseille Métro | Positive (and sometimes negative) polarity on guide bars. See DC, four-rail below. |
| France | Lille | Lille Métro | Positive (and sometimes negative) polarity on guide bars. See DC, four-rail below. |
| France | Rennes | Rennes Métro | Positive (and sometimes negative) polarity on guide bars. See DC, four-rail below. |
| France | Toulouse | Toulouse Métro | Positive (and sometimes negative) polarity on guide bars. See DC, four-rail below. |
| Hong Kong | Hong Kong | Hong Kong International Airport Automated People Mover (APM) | Mitsubishi "Crystal Mover" system using two power rails (positive and negative) with side collection. |
| Indonesia | Palembang | Palembang Light Rail Transit | Palembang Light Rail Transit and Greater Jakarta Light Rail Transit are operated by Kereta Api Indonesia. Jakarta Light Rail Transit is operated by Jakarta Propertindo (Jakpro). |
| Indonesia | Jakarta | Jakarta Light Rail Transit | Palembang Light Rail Transit and Greater Jakarta Light Rail Transit are operated by Kereta Api Indonesia. Jakarta Light Rail Transit is operated by Jakarta Propertindo (Jakpro). |
| Indonesia | Jakarta | Greater Jakarta Light Rail Transit | Palembang Light Rail Transit and Greater Jakarta Light Rail Transit are operated by Kereta Api Indonesia. Jakarta Light Rail Transit is operated by Jakarta Propertindo (Jakpro). |
| Japan | Sapporo, Hokkaido | Sapporo Municipal Subway Namboku Line | |
| Singapore | Singapore | Light Rail Transit | Sengkang and Punggol lines operated by SBS Transit |
| Singapore | Singapore | Sentosa Express | Sentosa Express operated by SDC |
| Malaysia | Klang Valley | Klang Valley Integrated Transit System LRT Kelana Jaya line | Innovia Metro system using two power rails (positive and negative) with side collection. |
| United States | Las Vegas | Las Vegas Monorail | |

##### Top contact

| Country | Location | Name of system | Notes |
| Canada | Vancouver | Vancouver SkyTrain | Canada Line only |
| China | Beijing | Beijing Subway | Capital Airport Line use bottom contact |
| China | Tianjin | Tianjin Metro | Line 1 only |
| France | Paris | Paris Métro (Conventional metro) | |
| Germany | Berlin | Berlin U-Bahn | Lines from U1 to U4 (small profile) |
| Greece | Athens | Athens Metro | Line 1 was 600 V before 1985. |
| Hungary | Budapest | Budapest Metro | Except line M1, which is 600 V DC with overhead lines. |
| India | Kolkata | Kolkata Metro | |
| Japan | Osaka, Osaka | Osaka Metro | Except the Sakaisuji Line, Nagahori Tsurumi-ryokuchi Line, and the Imazatosuji Line, which are 1,500 V DC with overhead lines. |
| Japan | Suita, Osaka Toyonaka, Osaka | Kita-Osaka Kyuko Railway | |
| Japan | Higashiosaka, Osaka Ikoma, Nara Nara, Nara | Kintetsu Keihanna Line | |
| Japan | Yokohama, Kanagawa | Yokohama Municipal Subway | Blue Line (Line 1 and Line 3) only |
| North Korea | Pyongyang | Pyongyang Metro | based on fleet of cars from Beijing and Germany |
| South Korea | Yongin | Everline | |
| Portugal | Lisbon | Lisbon Metro | |
| Sweden | Stockholm | Stockholm Metro | Nominal voltage 650 V, subway 3 (blue line) 750 V. Subway 1 and 2 will change in the long term to 750 V. |
| United Kingdom | Liverpool | Merseyrail | |
| United Kingdom | London | Northern City Line | access to City (Moorgate) |
| United Kingdom | London | Suburban electrification of the LNWR Suburban Network | formerly four-rail out of Euston and Broad Street, curtailed, upgraded and standardised |
| United Kingdom | Southern England | Southern Region of British Railways and successors | 660 V system upgraded and expanded |
| United Kingdom | London | Waterloo and City line | Upgraded by British Rail to 750V prior to sale to London Underground |
| United States | Atlanta | MARTA | |
| United States | Los Angeles | Los Angeles Metro Rail | B and D Lines |
| United States | Miami | Metrorail | |
| United States | New York City and Long Island East River Tunnels shared with Amtrak | Long Island Rail Road | Central, Greenport, and Oyster Bay branches not electrified; Montauk Branch not electrified east of Babylon; Port Jefferson Branch not electrified east of Huntington |
| United States | Philadelphia | PATCO Speedline | |
| United States | Puerto Rico | Tren Urbano | |
| United States | Washington, D.C. | Washington Metro | |
| United States | within the Hudson and East River Tunnels as well as under Manhattan Northeast Corridor | Amtrak | |
| United States | within the Hudson Tunnel into Manhattan | New Jersey Transit | |

##### Mixed

| Type | Country | Location | Name of system | Notes |
| See note | China | Tianjin | Tianjin Metro | Top contact in Line 1, bottom contact in Lines 2 and 3 |

#### 1,200 V DC conductor

All systems are third rail and side contact unless stated otherwise.
| Country | Location | Name of system | Notes |
| Germany | Hamburg | Hamburg S-Bahn | 15 kV  16.7 Hz AC with overhead line in part of network. |
| United Kingdom | Manchester | Bury Line | Dismantled 1991, converted to Manchester Metrolink tramway (750 V DC overhead) |
| United States | California | Central California Traction Company | 1908–1946, bottom contact |

#### 1,500 V DC conductor

All systems are third rail unless stated otherwise.
| Type | Country | Location | Name of system | Notes |
| Bottom contact | France | Paris | Paris Métro Line 18 | Currently under construction |
| Bottom contact | France | Toulouse | Line C (Toulouse Metro) [fr] | Currently under construction |
| Side contact | France | Chambéry – Modane | Culoz–Modane railway | used between 1925 and 1976, today overhead wire |
| Bottom contact | China | Beijing | Beijing Subway | Line 7 only |
| Bottom contact | China | Guangzhou | Guangzhou Metro | Lines 4, 5, 6, 14 and 21 only. Overhead wires in depots; all trains are equipped with pantographs |
| Bottom contact | China | Kunming | Kunming Metro | Line 4 only |
| Bottom contact | China | Qingdao | Qingdao Metro | |
| Bottom contact | China | Shanghai | Shanghai Metro | Lines 16 and 17 only. Overhead wires in depot of Line 16, all trains on Line 16 have pantographs for depot use. |
| Bottom contact | China | Shenzhen | Shenzhen Metro | Lines 3 and 6 only. Overhead wires in depot of Line 6, all trains on Line 6 have pantographs for depot use. |
| Bottom contact | China | Wuhan | Wuhan Metro | Lines 7, 8, 11 and Yangluo Line only |
| Bottom contact | China | Wuxi | Wuxi Metro | |

## Systems using non-standard voltages
### Overhead systems
#### DC voltage

| Voltage | Country | Location | Name of system | Notes |
| 120 | United Kingdom | Seaton, Devon | Seaton Tramway | Half scale trams. Operated 1969-now. Substations have battery banks for back up. |
| 250 | United States | Chicago | Chicago Tunnel Company | operated 1906–1959 |
| 370 | United States | Connecticut | Norwich and Westerly Railway | operated 1906–1922 |
| 525 | Switzerland | Lauterbrunnen | Bergbahn Lauterbrunnen-Mürren | |
| 550 | Hong Kong | Hong Kong Island | Hong Kong Tramways | |
| 550 | Isle of Man | Isle of Man | Manx Electric Railway | |
| 550 | Isle of Man | Isle of Man | Snaefell Mountain Railway | The third rail is for the Fell Brake and doesn't carry any power |
| 550 | India | Kolkata | Trams in Kolkata | |
| 550 | United States | Bakersfield, California | Bakersfield and Kern Electric Railway | operated 1888–1942 |
| 550 | United States | Fresno, California | Fresno Traction Company | operated 1903–1939 |
| 550 | United States | Monterey, California | Monterey and Pacific Grove Railway | operated 1905–1923 |
| 550 | United States | Phoenix, Arizona | Phoenix Street Railway | operated 1888–1948 |
| 550 | United States | Reno, Nevada | Reno Traction Company | operated 1904–1927, see Streetcars in Reno |
| 575 | United States | Birmingham, Alabama | Birmingham Railway, Light and Power Company | |
| 650 | United States | Buffalo, New York | Buffalo Metro Rail | |
| 650 | United States | El Paso, Texas | El Paso Streetcar | |
| 650 | United States | Pittsburgh | Pittsburgh Light Rail | |
| 650 | Switzerland | Basel | Basel Trams (BVB/BLT) | |
| 660 | Poland | Metropolis GZM | Silesian Interurbans | |
| 700 | Switzerland | Bex – Col de Bretaye, Vaud | Chemin de fer Bex-Villars-Bretaye | |
| 730 | United States | Pennsylvania | Philadelphia Suburban Transportation Company | purchased by Philadelphia and Western Railroad in 1953 and converted to 600 VDC |
| 800 | Poland | Tricity | Szybka Kolej Miejska (Tricity) | Operated 1951–1976. Converted to 3,000 V DC in 1976. |
| 825 | United States | Portland, Oregon | MAX, TriMet | Light rail sections west of NE 9th Avenue & Holladay Street utilize a 750 V system |
| 850 | Switzerland | Capolago – Monte Generoso, Ticino | Ferrovia Monte Generoso (MG) | |
| 900 | Switzerland | Fribourg | Gruyere – Fribourg – Morat | |
| 900 | Switzerland | Vaud | Montreux–Lenk im Simmental line | |
| 900 | Switzerland | Vaud | Vevey–Les Pléiades | |
| 1,000 | Italy Switzerland | St Moritz, canton of Graubünden – Tirano, Lombardy | Rhätische Bahn (RhB) | Bernina line only; remainder of system electrified at 11 kV AC, 16 2⁄3 Hz. The Bernina line is an international line linking Switzerland (St. Moritz) with Italy (Tirano) |
| 1,000 | Hungary | Budapest | Budapest Commuter Rail and Rapid Transit (BHÉV) | |
| 1,100 | Argentina | Buenos Aires | Buenos Aires Metro (Subterráneos de Buenos Aires) | Only Line A (converted to 1,500 V DC with La Brugeoise trains replaced by new rolling stock in 2013) |
| 1,250 | Switzerland | Canton of Bern | Regionalverkehr Bern-Solothurn (RBS) | All lines except tram line 6 between Bern and Worb, which is electrified at 600 V DC |
| 1,350 | Italy Switzerland | Domodossola, Piedmont – Locarno, canton of Ticino | Domodossola–Locarno railway line (FART / SSIF [de]) | International railway between Italy (Domodossola) and Switzerland (Locarno) |
| 1,350 | Switzerland | Lugano – Ponte Tresa, canton of Ticino | Ferrovia Lugano–Ponte Tresa (FLP) | |
| 1,650 | Denmark | Copenhagen | Copenhagen S-train | Suburban rail network in Copenhagen |
| 1,650 | Italy | Rome | Rome–Giardinetti railway | Isolated Italian metre gauge line. |
| 2,400 | Germany | Lausitzer | | work line of the Lausitzer Braunkohle coal company |
| 2,400 | Poland | Konin | Konin Coal Mine | |
| 2,400 | Poland | Turek | PAK KWB ADAMÓW | mine closed in February 2021, the railway will be dismantled |
| 2,400 | France | Grenoble | Chemin de fer de La Mure | −1,200 V, +1,200 V two wire system from 1903 to 1950. 2,400 V since 1950. |
| 2,400 | United States | Montana | Butte, Anaconda and Pacific Railway | electrified 1913–1967, dismantled in favor of diesel power |
| 3,500 | United Kingdom | Manchester | Bury – Holcombe Brook | operated 1913–1918 |
| 6,000 | Russia | | | experiments in the late 1970s (3,000 V DC lines) |

#### AC voltage

| Voltage | Frequency | Country | Location | Name of system | Notes |
| 3,300 | 15 Hz | United States | Tulare County, California | Visalia Electric Railroad | 1904–1992 |
| 3,300 | 25 Hz | United States | Napa and Solano Counties, California | San Francisco, Napa and Calistoga Railway | 1905–1937 |
| 5,500 | 16+2⁄3 Hz | Germany | Murnau | Ammergau Railway | 1905–1955, after 1955 15 kV, 16.7 Hz |
| 6,250 | 50 Hz | United Kingdom | London, Essex, Herts | Great Eastern suburban lines | Great Eastern suburban lines from Liverpool Street London, 1950s–c1980 (converted to 25 kV) |
| 6,250 | 50 Hz | United Kingdom | Glasgow | Glasgow suburban lines | Sections of the North Clyde Line and Cathcart Circle Line from 1960-1970s |
| 6,300 | 25 Hz | Germany | Hamburg | Hamburg S-Bahn | Operated with AC 1907–1955. Used both AC and DC (1,200 V 3rd rail) 1940–1955. |
| 6,500 | 25 Hz | Austria | Sankt Pölten | Mariazellerbahn | |
| 6,600 | 25 Hz | Norway | Orkland | Thamshavnbanen | |
| 6,600 | 50 Hz | Germany | Cologne Lowland | Hambachbahn and Nord-Süd-Bahn | transports lignite from open-pit mines to powerplants. Owned by RWE. |
| 6,600 | | United States | Northern Indiana | Chicago, Lake Shore and South Bend Railway | 1908–1925 Converted to 1,500 V DC |
| 6,700 | 25 Hz | United Kingdom | Morecambe branch line | Lancaster to Heysham | 1908–1951 Converted to 25 kV 50 Hz as a test bed for the future main line electrification system |
| 6,700 | 25 Hz | United Kingdom | South London line | London Victoria to London Bridge | 1909–1928 Converted to 660 V (later 750 V) DC third-rail supply |
| 8 kV | 25 Hz | Germany | Karlsruhe | Alb Valley Railway | 1911–1966, today using 750 V DC |
| 10 kV | 25 Hz | Netherlands | The Hague – Rotterdam | Hofpleinlijn | from 1908, in 1926 converted to 1,500 DC, In 2006 replaced by 750 V DC light rail |
| 10 kV | 50 Hz | Russia | industrial railways at quarries | Russian Railways | operated from 1950s at coal and ore quarries |
| 10 kV | 50 Hz | Ukraine | industrial railways at quarries | Ukrainian Railways | operated from 1950s at coal and ore quarries |
| 10 kV | 50 Hz | Kazakhstan | industrial railways at quarries | some private industrial railways in Kazakhstan | operated from 1950s at coal and ore quarries |
| 11 kV | 16+2⁄3 Hz | Switzerland | Graubünden | Rhätische Bahn (RhB) | Except the Bernina line, which is electrified at 1,000 V DC |
| 11 kV | 16+2⁄3 Hz | Switzerland | | Matterhorn-Gotthard-Bahn (MGB) | formerly Furka Oberalp Bahn (FO) and BVZ Zermatt-Bahn |
| 11 kV | 50 Hz | France | Saint-Gervais-les-Bains | Mont Blanc Tramway | |
| 11 kV | 25 Hz | United States | | Pennsylvania Railroad Etc., | All lines now 12 kV 25 Hz or 12.5 kV 60 Hz See Railroad electrification in the United States |
| 11 kV | 25 Hz | United States | Washington | Cascade Tunnel | Converted from three-phase 6600 V 25 Hz in 1927, dismantled 1956 |
| 11 kV | 25 Hz | United States | Colorado | Denver and Intermountain Railroad | dismantled c. 1953 |
| 12 kV | 16+2⁄3 Hz | France | lines in Pyrenees | Chemin de fer du Midi | most converted to 1,500 V 1922–23; Villefranche-Perpignan diesel 1971, then 1,500 V 1984 |
| 12 kV | 25 Hz | United States | Washington, DC – New York City | Northeast Corridor (NEC), Amtrak | 11 kV until 1978 |
| 12 kV | 25 Hz | United States | Harrisburg, Pennsylvania to Philadelphia | Keystone Corridor, Amtrak | 11 kV until 1978 |
| 12 kV | 25 Hz | United States | Philadelphia | SEPTA | Regional Rail system only; 11 kV until 1978 |
| 12 kV | 25 Hz | United States | Rahway to Aberdeen-Matawan, New Jersey | North Jersey Coast Line, New Jersey Transit | 1978–2002 (11 kV until 1978). Converted to 25 kV 60 Hz |
| 12.5 kV | 60 Hz | United States | Pelham, NY-New Haven, CT | New Haven Line, Metro-North Railroad, Amtrak | 11 kV until 1985 |
| 16 kV | 50 Hz | Hungary | Budapest–Hegyeshalom railway | Budapest to Hegyeshalom | Kandó system 1931–1972, converted to 25 kV 50 Hz |
| 20 kV | 50 Hz | Germany | Freiburg | Höllentalbahn | Operated 1933–1960. Converted to 15 kV 16+2⁄3 Hz. |
| 20 kV | 50 Hz | France | Aix-les-Bains – La Roche-sur-Foron | Société Nationale des Chemins de fer (SNCF) | Operated 1950–1953. Converted to 25 kV 50 Hz. |
| 20 kV | 50 Hz | Japan | most electrified JR/the third sector lines in Hokkaidō and Tōhoku | JR East, JR Hokkaidō, and others | |
| 20 kV | 60 Hz | Japan | most electrified JR/the third sector lines in Kyūshū and Hokuriku region | JR Kyūshū and others | |
| 50 kV | 50 Hz | South Africa | Northern Cape, Western Cape | Sishen–Saldanha railway line | opened in 1976 and hauls iron ore |
| 50 kV | 60 Hz | Canada | British Columbia | Tumbler Ridge Subdivision of BC Rail (Now Canadian National Railway) | Opened in 1983 to serve a coal mine in the northern Rocky Mountains. No longer in use. |
| 50 kV | 60 Hz | United States | Arizona | Black Mesa and Lake Powell Railroad | First line to use 50 kV electrification when it opened in 1973. This was an isolated coal-hauling short line; no longer in use. |
| 50 kV | 60 Hz | United States | Utah | Deseret Power Railroad | Formerly Deseret Western Railway. This is an isolated coal-hauling short line. |

#### Three-phase AC voltage
##### Two wires

| Voltage | Current | Country | Location | Name of system | Notes |
| 725 | 50 Hz, 3φ | Switzerland | Zermatt – Gornergrat, canton of Valais | Gornergratbahn | |
| 750 | 40 Hz, 3φ | Switzerland | Burgdorf – Thun | Burgdorf-Thun Bahn | Operated 1899–1933 converted to 15 kV 16+2⁄3 Hz in 1933 |
| 900 | 60 Hz, 3φ | Brazil | Rio de Janeiro | Corcovado Rack Railway | |
| 1125 | 50 Hz, 3φ | Switzerland | Interlaken | Jungfraubahn | |
| 3600 | 15 Hz, 3φ | Italy | Northern Italy | Valtellina Electrification | 1902–1917 |
| 3600 | 50 Hz, 3φ | France | Saint-Jean-de-Luz to Larrun | Chemin de Fer de la Rhune | |
| 3600 | 16 Hz, 3φ | Italy Switzerland | Simplon Tunnel | | 1906–1930 |
| 3600 | 16+2⁄3 Hz, 3φ | Italy | | | operated 1912–1976 in Upper Italy (more info needed) |
| 3600 | 16+2⁄3 Hz, 3φ | Italy | Porrettana railway | FS | 1927–1935 |
| 3600 | 16+2⁄3 Hz, 3φ | Italy | Trento/Trient to Brenner | Brenner Railway | 1929–1965 |
| 5200 | 25 Hz, 3φ | Spain | Gérgal – Santa Fe | C.de H. Sur de España | 1911–1966? |
| 6600 | 25 Hz, 3φ | United States | Cascade Tunnel | Great Northern Railway (U.S.) | 1909–1929 |
| 10 kV | 45 Hz, 3φ | Italy | Roma – Sulmona | FS | 1929–1944 |

##### Three wires

| Voltage | Current | Country | Location | Name of system | Notes |
| 3000 V | 50 Hz | Germany | Kierberg | Zahnradbahn Tagebau Gruhlwerk | rack railway (0.7 km) operated 1927–1949 |
| 10000 V | 50 Hz | Germany | Berlin-Lichterfelde (de) | | test track (1.8 km); variable voltage and frequency; trial runs 1898–1901 |
| 14 kV (See notes) | 38 Hz – 48 Hz (See notes) | Germany | Zossen – Marienfelde | | test track (23.4 km); trial runs 1901–1904 variable voltage between 10 kV and 14 kV and frequency between 38 Hz and 48 Hz. |
| | 50 Hz | Russia | Ship elevator of Krasnoyarsk Reservoir | | length: 1.5 km, 9000 mm gauge |

### Conductor rail systems (DC voltage)

Conductor rail systems have been separated into tables based on whether they are top, side or bottom contact.

#### Top contact systems

| Voltage | Type | Country | Location | Name of system | Notes |
| 50 | See notes | United Kingdom | Brighton | Volk's Electric Railway | Volk's Railway prior to 1884 (current fed through running rails) |
| 110 | third rail | United Kingdom | Brighton | Volk's Electric Railway | Claims to be the world's oldest operational electric railway |
| 160 | third rail | United Kingdom | Brighton | Volk's Electric Railway | Volk's Railway between 1884 and 1980s |
| 100 | fourth rail | United Kingdom | Beaulieu | Beaulieu Monorail (National Motor Museum – Beaulieu Palace House) | current fed by 2 contact wires |
| 180 | See notes | Germany | Berlin-Lichterfelde | Siemens streetcar | Current fed through the running rails Operated 1881–1891 |
| 200 | third rail | United Kingdom | Southend | Southend Pier Railway | Until 1902 |
| 250 | third rail | United Kingdom | Hythe, Hampshire | Hythe Pier Railway | |
| 250 | third rail | United States | Chicago, Illinois | Chicago Tunnel Company | Morgan Rack 1904, revenue service 1906–1908 |
| 300 | third rail | Georgia | New Athos Cave Railway | | |
| 400 | third rail | Germany | Berchtesgaden | Berchtesgaden Salt Mine Railway | |
| 440 | third rail | United Kingdom | London | Post Office Railway | Disused by post office since 2003 Now small section near Mount Pleasant operated as tourist attraction with battery powered stock 150 V was used in station areas to limit train speed |
| 550 | third rail | Argentina | Buenos Aires | Buenos Aires Metro (Subterráneos de Buenos Aires) | Only Line B |
| 625 | third rail | United States | New York City | New York City Subway | |
| 630 | third rail | United States | Philadelphia | SEPTA – Norristown High Speed Line | |
| 630 | fourth rail | United Kingdom | London | London Underground | Supplied at +420 V and −210 V (630 V total). |
| 650 | See notes | United Kingdom | London | Euston to Watford DC Line | Third rail with fourth rail bonded to running rail To enable London Underground trains to operate between Queen's Park and Harrow & Wealdstone. Similar bonding arrangements are used on the North London Line between Richmond and Gunnersbury and on the District Line between Putney Bridge and Wimbledon. |
| 660 | third rail | United Kingdom | | Southern Railway & London & South Western Railway | some areas up to 1939, original standard, mostly upgraded to 750 V (except for sections that operate with LUL stock). |
| 700 | third rail | United States | Baltimore, Maryland | Baltimore Metro SubwayLink | |
| 800 | third rail | Germany | Berlin | Berlin S-Bahn | discontinued, today 750 V |
| 825 | third rail | North Korea | Pyongyang | Pyongyang Metro | uses old 750 V Berlin U-Bahn rolling stock |
| 1000 | third rail | United States | San Francisco | Bay Area Rapid Transit | |

#### Side contact systems

All third rail unless otherwise stated.
| Voltage | Country | Location | Name of system | Notes |
| 650 | Canada | Vancouver | SkyTrain | Expo Line (1985) and Millennium Line (2006). Linear induction. |
| 850 | France | Martigny | Saint-Gervais–Vallorcine railway | |
| 1200 | Germany | Hamburg | Hamburg S-Bahn | Since 1940. Used both third rail DC (1200 V) and overhead line AC (6.3 kV 25 Hz) until 1955. Also uses German standard 15 kV AC 16 2/3 Hz overhead electrification on the section between Neugraben and Stade on line S3, opened in December 2007. |

#### Bottom contact systems

All third rail unless otherwise stated.
| Voltage | Country | Location | Name of system | Notes |
| 550 | United States | California | Central California Traction Company | 1907–1908, raised to 1,200 V |
| 700 | United States | New York | Metro-North Railroad | Hudson and Harlem Lines, southern part of New Haven Line. Original New York Central Railroad electrification scheme to Grand Central Terminal. |
| 700 | United States | Philadelphia | SEPTA – Market–Frankford Line | Originally 600 V, raised to 700 V |
| 825 | Belarus | Minsk | Minsk Metro | FSU underground system standard, 825V substation output, 750V in rail on average |
| 825 | Bulgaria | Sofia | Sofia Metro | Lines 1 and 2 |
| 825 | Russia | Moscow | Moscow Metro | Nominal voltage: 825 V; allowed range: 550 V – 975 V |
| 825 | Russia | Saint Petersburg | Saint Petersburg Metro | Nominal voltage: 825 V; allowed range: 550 V – 975 V |
| 825 | Russia | Kazan | Kazan Metro | Nominal voltage: 825 V; allowed range: 550 V – 975 V |
| 825 | Russia | Nizhny Novgorod | Nizhny Novgorod Metro | Nominal voltage: 825 V; allowed range: 550 V – 975 V |
| 825 | Russia | Novosibirsk | Novosibirsk Metro | Nominal voltage: 825 V; allowed range: 550 V – 975 V |
| 825 | Russia | Samara | Samara Metro | Nominal voltage: 825 V; allowed range: 550 V – 975 V |
| 825 | Russia | Yekaterinburg | Yekaterinburg Metro | Nominal voltage: 825 V; allowed range: 550 V – 975 V |
| 825 | Ukraine | Kyiv | Kyiv Metro | FSU underground systems share the same standard |
| 825 | Ukraine | Dnipro | Dnipro Metro | FSU underground systems share the same standard |
| 825 | Ukraine | Kharkiv | Kharkiv Metro | FSU underground systems share the same standard |
| 830 | Argentina | Buenos Aires | Mitre Line | Retiro – José León Suárez Retiro – Bartolomé Mitre Retiro – Tigre |
| 830 | Argentina | Buenos Aires | Once – Moreno | Sarmiento Line |
| 850 | France | Villefranche | Ligne de Cerdagne | Often referred to as the "Yellow Train" |
| 850 | Austria | Vienna | Wiener Lokalbahn | |
| 900 | Belgium | Brussels | Brussels Metro | |

### Conductor rail systems (AC voltage)

All systems are 3-phase unless otherwise noted.
| Voltage | Current | Contact | Country | Location | Name of system | Notes |
| 500 | 50 Hz | top/bottom | Australia | Gold Coast, Queensland | Sea World Monorail | Operated 1986–2021 |
| 500 | 50 Hz | top/bottom | Australia | Gold Coast, Queensland | Oasis Shopping Centre | Operated 1989–2017 |
| 500 | 50 Hz | top/bottom | Australia | Sydney, New South Wales | Sydney Monorail | Operated 1988–2013 |
| 600 | 50 Hz | side | China | Guangzhou | Guangzhou Metro – APM Line | |
| 600 | 50 Hz | side | Singapore | Singapore | LRT – Bukit Panjang line | |
| 600 | 50 Hz | side | Japan | Saitama | New Shuttle | |
| 600 | 50 Hz | side | Japan | Tokyo | Nippori-Toneri Liner | |
| 600 | 50 Hz | side | Japan | Tokyo | Yurikamome | |
| 600 | 60 Hz | side | Japan | Kobe, Hyōgo | Kobe New Transit | |
| 600 | 60 Hz | side | Japan | Osaka | Osaka Metro – Nankō Port Town Line | |
| 600 | 60 Hz | side | Japan | Osaka | Kansai International Airport – Wing Shuttle | |
| 600 | 60 Hz | side | Taiwan | Taoyuan | Taoyuan International Airport – Skytrain |

## Special or unusual types
### DC, plough collection from conductors in conduit below track

* London County Council Tramways, later operated by London Transport
* streetcars in New York City (Manhattan), New York
* Washington, D.C. streetcars
* Panama Canal locks' ship handlers (called mules)

### DC, one ground-level conductor

* Wolverhampton Corporation Tramways, England (stud contact) (1902–1921)
* Bordeaux Tramway, France (conductor rail)
* Sydney Light Rail (tramway)

### DC, two-wire

* Greenwich, England. Previously used by trams when in the vicinity of Greenwich Observatory; separate from trolleybus supply.
* Cincinnati, Ohio, US. Tram (streetcar) system used this arrangement throughout, probably due to legal constraints on ground return currents.
* Havana and Guanabacoa, Cuba. Tram (streetcar) systems in both cities used this arrangement.
* Lisbon, Portugal. Elevador da Bica, Elevador da Glória and Elevador da Lavra.

### DC, power from running rails

* Gross-Lichterfelde Tramway (1881–1893), 180 V
* Ungerer Tramway (1886–1895)
* transportable railways as a ride for children

### DC, four-rail

| Voltage | Type | Contact system | Name of system | Location | Country | Notes |
| 750 | Guide bars | Lateral to both guide bars (one guide connected to running rail) | Paris Metro | Paris | France | Rubber-tyred lines only |
| 750 | Guide bars | Lateral (positive) and top of running rails (negative) contact | Montreal Metro | Montreal | Canada | Rubber-tyred lines |
| 750 | Guide bars | Lateral (positive) and top of running rails (negative) contact | Mexico City Metro | Mexico City | Mexico | Rubber-tyred lines |
| 750 | Third and fourth rail | Lateral (positive) and top (negative) contact | Milan Transportation System | Milan | Italy | Metro (only line 1) |
| 630 | Third and fourth rail | Top contact | London Underground | London | United Kingdom | Transport for London |