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Logo. Feature : Power
One example for Feature : Power
Used for describe power lines and associated infrastructure.

The power=* tag is used to identify a wide range of facilities and features that relate to the generation and distribution of electrical power including power lines, power generation, pylons and sub-stations. WikiProject Power networks gives more details of the project to map electricity distribution.


Key Value Element Comment Rendering Photo
power plant area relation A place/industrial facility where power is generated (electricity, heat, cold water, biogas...). Individual generating units within the facility should be tagged as power=generator.
Huntly Power Station.JPG
power cable way A way following the path of underground cables, such as the local 0.4 kV network between transformer stations, distribution boxes and cable connection points, or sea cables. Not to be confused with non-power supply cables such as cables for telecommunication. May be combined with voltage=*, circuits=* and location=*.
Power to the People - geograph.org.uk - 560240.jpg
power catenary_mast node A catenary mast supports system of overhead wires used to supply electricity to electricaly powered vehicle equipped with a pantograph.
Stahl-Oberleitungsmast Deutsche Bahn.jpg
power compensator node area Several kind of power devices used to insure of power quality and network resilience.
Static VAR Compensator 2a.png
power connection node A freestanding electrical connection between two or more overhead wires
Dülmen, Umspannstation -- 2014 -- 0005.jpg
power converter node area An HVDC converter converts electric power from high voltage alternating current (AC) to high-voltage direct current (HVDC), or vice-versa.
Pole 2 Thyristor Valve.jpg
power generator node area A device used to convert power from one form to another. Use in combination with generator:source=*, generator:method=* and generator:output=*. Depends on generator type
Eoliennes Gaspesie.jpg
power heliostat node A mirror of a heliostat device.
power insulator node way A device to protect a power line from grounding on supports
Power insulator.png
power line way A way following the path of (overground) power cables. For minor power lines with poles and not towers, you may want to use power=minor_line. Useful combinations: voltage=*, cables=* and wires=*. Please see the respective feature pages for details.
Power line.png
Electric transmission lines.jpg
power marker node Using this tag is discouraged, use Key:marker instead.
power minor_line way A way following the path of (overground) minor power cables, supported by poles and not towers/pylons. (This isn't quite so simple, as sometimes larger towers are replaced by smaller poles made with a stronger material; a better distinction might be based on voltage).
Power minor line.png
power pole node Poles supporting low to medium voltage lines (power=minor_line) and high voltage lines (power=line) up to 161,000 volts (161 kV).
Power pole.svg
power portal nodeway Power supporting structure composed of vertical legs with cables between them attached to a horizontal crossarm
Power substation portal.jpg
power substation node area A tag for electricity substations. These provide voltage step-up/step-down, switching, conditioning, etc. Substations may be large facilities (up to several acres) for very high voltage transmission lines or just small buildings or kiosks near the street for low voltage distribution lines. Useful combinations: voltage=*, substation=* and location=*, see the feature page for details.
power switch node A tag for electricity switches which are devices which allow operators to power up & down lines and transformer in substations or outside.
French overhead power switch pole.jpg
power switchgear area The switchgear comprises one or more busbar assemblies and a number of bays each connecting a circuit to the busbar assembly.
Kernkraftwerk Grafenrheinfeld 14.jpg
power terminal node Point of connection between overhead power lines to buildings or walls
power tower node For towers or pylons carrying high voltage electricity cables. Normally constructed from steel latticework but tubular or solid pylons are also commonly used. Should not be used for medium or low voltage electricity conductors carried on single wooden poles which might be tagged power=pole. See power=tower for detailed tagging of tower types.
Power-tower mapnik.png
Benkid77 Puddington-Shotwick footpath 24 110809.JPG
power transformer node A static device for transferring electric energy by inductive coupling between its windings. Large power transformers are typically located inside substations.
Trafostation Alter Hellweg IMGP4722.jpg
power User Defined node way area All commonly used values according to Taginfo
line busbar way Specifies that a power=line is a busbar in a substation.
line bay way Specifies a power=line is a bay which connects an incoming circuit to a busbar assembly.

This table is a wiki template with a default description in English. Editable here.


Very useful for navigation.

The number of wires in each cable can tagged using wires=single, wires=double or wires=quad. All towers also have one or more earth wires strung from the top.


See WikiProject Power networks/France


See WikiProject Power networks/Germany. The transmission network usually uses steel lattice pylons. There are three voltages:

  • 380 kV: mostly triple or quadruple wires, historic lines may have double wires
  • 220 kV: mostly double wires, historic lines may have single wires
  • 110 kV subtransmission: single wires

Frequently, pylons carry multiple lines even at different voltages to save space.

The distribution network lines operate at 20 kV in most rural regions and are installed on wooden, concrete or small metal poles. 3 or 6 single wires, usually no ground wire. Single remote houses or farmyards may be supplied by 950 V lines of similar appearance.

Power lines showing 4 or 8 cables belong to the railway traction power network operated by DB Energie independently (110 kV two-phase, 16.7 Hz). Mostly single wires, rarely double or quadruple (at same voltage, increasing the possible current load).


In Japan, see User:Nahainec/PowerLine.


Further information at WikiProject Power networks/Philippines

Power lines in the Philippines are operated by various companies and cooperatives. The National Grid Corporation of the Philippines (NGCP) operates both subtransmission (69 and 115 kV) and transmission lines (115 kV, 138 kV, 230 kV, 350 kV DC, and 500 kV), but utilities (e.g. Meralco, Visayas Electric Company, Davao Light) and electric cooperatives may operate subtransmission lines (69 or 115 kV) and distribution lines (usually 7.97/13.8 kV, or 20/34.5 kV). Some electric cooperatives only operate distribution lines, and depend on NGCP (or NAPOCOR-SPUG in areas not yet connected to NGCP grids) for subtransmission lines to feed their substations.

Power line locations may be on allocated right of way or along roads or railroads. Transmission lines usually run on separate right of way, but a few partially or completely running along roads or railroads. Subtransmission lines by NGCP typically run on separate right of way and some segments follow roads, but utility or cooperative-owned subtransmission lines are usually roadside, for easier access by work vehicles. Distribution lines are almost roadside and areas served by the lines are usually served by multiple distribution transformers (single-phase), like the common practice in most of Asia and the Americas. Smaller distribution substations (substation=minor_distribution) are primarily used on large users, like some government offices, malls, or condominiums, instead of a larger area, like residential areas, where multiple distribution transformers are used instead.

Voltages used are like those used in the United States, and the frequency is 60 Hz. The household voltage is 220 volts, 60 Hz, somehow double the 110/220 volts lines once used in the US, before it is raised to 115/230 volts and the current 120/240 volts, though people still refer them as 110 V volts. Standard voltages for power lines, follow this hierarchy, from low to high voltage, and further information can be seen in WikiProject Power networks/Philippines and User:TagaSanPedroAko/Philippines Tagging/Power lines.

Common grid voltages, with usual characteristics, are:

  • 220 volts - secondary distribution. Can be two-wire (line and neutral, common in most provinces served by electric cooperatives and other utilities) or three-wire (two 110 V lines with neutral, commonly in areas served by private utilities, especially Meralco).
  • 2,800/4,800 volts - one to three wires, carried on 9 meter and above poles. Transformers in these lines has primary bushings on the side of the transformers. This voltage, still used by Meralco, is being slowly phased out (through abandonment of lines or conversion of lines for the 34.5 kV level), to eliminate the need of additional substations or equipment to provide the voltage level to the end customers.
  • 7,620/13,200 volts (or 7970/13800 volts, by Meralco, in northern Bulacan, southern Cavite, parts of Laguna, and Batangas City and San Pascual in Batangas) - one to three wires, placed on poles 9 meters or above in height. Lines uses insulators of about 15 centimeters in length. Transformers on such lines usually feature two bushings, but the other bushing is rather part of the grounding mechanism, providing 220 volts directly on two-wire lines. Lines by Meralco, Cabanatuan Electric Corporation (CELCOR), and First Bay Power Corporation (in Bauan, Batangas) use both bushings, thus, they supply 110*2 split-phase voltage. This voltage is most used by most electric cooperatives in the Philippines, as well as by most utilities.
  • 20,000/34,500 volts - one to three wires, usually in poles 12 meters and above in height. Lines of these voltage uses transformers with only one bushing, and uses insulators of about 35 or 45 centimeters in length. This voltage is usually used by Meralco, but also used by Cagayan Electric Power and Light Company (CEPALCO) in Cagayan de Oro (though the common voltage used is 7.62/13.2 kV, fed by the 69 kV network).
  • 69,000 volts - three-wire system, usually without a neutral, that uses poles 15 meters and above in height, and uses 70 to 75 centimeter insulators (pole mounted, suspension-type, strain-type, and rarely, pin-type). 230,000 kV-designed steel poles, however, are rarely used. Considered a subtransmission voltage, and connects to larger customers and the primary distribution systems. Mostly used by the National Grid Corporation of the Philippines, but also used by some electric cooperatives and utilities.
  • 115,000 volts - three wire system, with or without neutral, either on poles or towers, and uses 1.2 meter insulators (pole mounted, suspension-type, and strain-type) Usually found in Meralco's coverage area, but also used by the National Grid Corporation of the Philippines, especially its transmission lines that connect to the wind farms in Ilocos Norte.
  • 138,000 volts - three wire systems (single or double circuit), on towers or steel poles with insulators of approximately 1.4 to 1.5 meters in length. Considered a regional transmission voltage in Visayas and Mindanao.
  • 230,000 volts - three wire systems (single or double circuit), on towers or steel poles with insulators of approximately 2.3 to 2.4 meters in length. Considered a regional transmission voltage in Luzon, but also used in Visayas and Mindanao as bulk transmission voltages (to complement the 138 kV systems there). Lines usually have one conductor, but may be bundled to two, three, or four for additional capacity or efficiency (to mitigate power loss from corona discharges)
  • 350,000 volts - two-wire systems (single circuit), on towers. Used on HVDC Leyte-Luzon transmission line, and has triple-bundle conductor (to mitigate power loss from corona discharges). On San Bernardino Strait between Cabacungan in Allen, Samar and Santa Magdalena in Sorsogon Province, Luzon, the line uses submarine cables.
  • 500,000 volts - three wire systems (single or double circuit), on towers, or rarely, steel poles with insulators of approximately 5 to 5.1 meters in length. Considered a bulk transmission voltage in Luzon, and has a high carrying capacity, through the use of quadruple-bundle conductor (to provide more capacity and mitigate corona discharges).

Transmission, subtransmission, and distribution grid voltages, however, differ by island group, region, and company/cooperative practice.

  • Metro Manila and nearby provinces in Luzon (Meralco):
    • Transmission: 500,000 volts, 230,000 volts,
    • Subtransmission 115,000 volts, 69,000 volts (northern Bulacan and Batangas City
    • Distribution: 34,500 volts/20,000 volts (most of Meralco's coverage area), 13,800 volts/7,970 volts (Batangas City and San Pascual, both in Batangas)
    • Household distribution: 110/220 volts (three wire split-phase)
  • Most of Luzon:
    • Transmission: 500,000 volts, 230,000 volts
    • Subtransmission: 69,000 volts
    • Distribution: 13,800 volts, 7970 volts
    • Household distribution: 220 volts (single phase)
  • Ilocos Region:
    • Transmission: 230,000 volts, 115,000 volts
    • Subtransmission: 69,000 volts
    • Distribution: 13,800 volts, 7970 volts
  • Visayas
    • Transmission: 230,000 volts, 138,000 volts
    • Subtransmission: 69,000 volts
    • Distribution: 13,800 volts, 7,970 volts
    • Household distribution: 220 volts (single phase)
  • Mindanao
    • Transmission: 230,000 volts (for implementation in the near future), 138,000 volts (current voltage, including the transmission backbone)
    • Subtransmission: 69,000 volts
    • Distribution: 34,500 volts/20,000 volts (Cagayan de Oro only), 13,800 volts, 7,970 volts
    • Household distribution: 220 volts (single phase) (110/220 volts use in Mindanao not known)

United Kingdom

See WikiProject Power networks/Great Britain.

United States

The number of conductors (i.e. single, double, triple) is simply relevant to the current handling capacity, and not more or less likely to be seen for any particular voltage. Similarly, the number of 3-phase circuits (groups of 3 cables) is simply a matter of capacity required, since single-circuit paths are (somewhat surprisingly) much cheaper to construct - the cost of the cables themselves apparently being the most significant factor.


OpenInfraMap renders electricity, telecommunications, water, petroleum, and microwave communications infrastructure, also features a similar rendering of power lines in one of its overlays, Names of substations and their highest voltage, and power plants are also indicated. Rendering of power lines and cables by voltage are similar to ITO Map's electricity overlay, now defunct.

The world on OpenInfraMap

Another visualization can be seen at Flosm.de.

Another visualization for part of Ukraine can be seen at nadoloni.com.

MapCSS style

A mapCSS stylesheet is available for josm.


See also