SK53
(SK53)
2
The preset voltages undoubtedly reflect European usage. Suggestions for changes can be made on the trac.openstreetmap.org site, component “Potlatch2”. If you do this include a list of the most frequent voltages.
The offline editor JOSM also can has configurable pre-sets which are stored in XML format locally. You may find it easier to create your own “power-mapping” presets for JOSM, as you could use those immediately: see http://www.christeck.de/wp/2010/01/17/external-presets-in-josm/