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Public-images-osm logo.svg power = minor_line
Minor power cables, supported by poles and not towers/pylons.
Used on these elements
should not be used on nodes
may be used on ways
should not be used on areas
use on relations unspecified
Useful combination
Status: Unspecified

High voltage electricity cables are tagged with power=line

Power lines carried on poles physically smaller than the high voltage pylons/towers, are tagged as power=minor_line. Mostly supported on single wooden poles, although sometimes the poles can have several supporting beams.

Draw a line following the path of the cables, adding a node at the location of poles. You can, additionally, then give each of those nodes the tag power=pole.

Minor_lines may be anything from a 20 kV line powering a small suburb, to a single cable running from a street lighting pole to the next one. Be careful not to mistake aerial telephone cables (or the like) for power lines.

There isn't yet any definitive criteria, but 45 kV (and higher voltage) lines are virtually always no longer minor. Also, if the cables are doubled (see wires=*), it is most likely big enough to be better tagged as power=line.


When known, you can also add at least these tags to further define the line:

  • voltage=* Nominal voltage (in Volts), for example 20000 or 400
  • cables=* Number of the cables carrying currect; Likely values are 1/3/6. The possible lightning protection / shield wire higher than the other cables is not included.
  • ref=*
  • name=*
  • operator=*


Mapnik renders these as a light gray line at high zooms. Osmarender uses a dashed line with a higher frequency of dashes than a normal power line, again only at high zooms.