...and what about AC/DC? (not the Rock band!!) --RalpH himself 20:05, 10 April 2009 (UTC)
...or Hz on AC lines? --Skippern 16:53, 11 April 2009 (UTC)
...and what about 3-phase? This really matches nowhere, although I personally would make it part of the frequency (which is closest of all), like 50(3) for 50Hz 3-phase. Exact syntax has to be figured out, maybe a new tag introduced. --RalpH himself 08:15, 15 April 2009 (UTC)
Hello, what about lines which has been switched off in past and are not used currently? I propose the following tagging: voltage=0/former_voltage e.g. voltage=0/25000. The zero is supposed to mean, that there is no voltage any more on the line. What's your opinion? --DB1BMN 09:09, 22 May 2009 (UTC)
How about using voltage:primary voltage:secondary ?
Would it not be an idea to adopt this tagging for power lines with multiple circuits that have different voltage? It is not uncommon around here to see 66kV on top and 22kV below. The key is already in use for transformers.