Hi, Thank you Jherome for this clarification attempt. No objection against mixing poles and tower on any lines.
Regarding the phase=2 discussion, phases=* have a clear definition. Occidental countries usualy have 3-phases power grids, but sometimes, 2 phases lines are used to feed train traction substations or heavy industries. It's not about a single phase line with neutral pole + 1 live cable, it's 2 live cables often taken from 3-phases substation or line. According to the picture used, this is the correct value : the transformer has 2 cables from a 3-phases line (without neutral pole) connected to its primary side. https://upload.wikimedia.org/wikipedia/commons/e/e3/Bridleway%2C_Atwick_-_geograph.org.uk_-_386117.jpg Furthermore, I'm wondering what's the best tagging regarding transformers or switches installed on top of power poles/towers : power=pole transformer=distribution voltage=... phases=... or power=pole transformer=distribution transformer:phases=... transformer:voltage=... Looking forward to your comments All the best *François Lacombe* fl dot infosreseaux At gmail dot com www.infos-reseaux.com @InfosReseaux <http://www.twitter.com/InfosReseaux> 2017-02-13 1:39 GMT+01:00 Tristan Anderson <andersontris...@hotmail.com>: > There's an intersting discussion about this here: > > > https://wiki.openstreetmap.org/wiki/Talk:Tag:power%3Dtransformer > > > Here it is suggested that split single-phase power be tagged as phases=2. > I disagree with this, and instead advocate tagging it as phases=1 > voltage=240. In North America at least, this implies split single-phase > power. The tag phases=2 should be reserved for the rare instances (maybe > not so rare in some parts of the world?) where actual two-phase power is > present. > > > Either way, this needs to be standardized and whatever decision we come to > needs to be made clear on the wiki pages for power=transformer and the new > power pole extension proposal. > ------------------------------ > *From:* Kevin Kenny <kevin.b.kenny+...@gmail.com> > *Sent:* February 12, 2017 7:14 PM > *To:* Tag discussion, strategy and related tools > *Subject:* Re: [Tagging] Feature Proposal - RFC - Power pole extension > > I think I've seen two-phase power once, in a commercial building in > Philadelphia, built around 1905. All the high-power uses (HVAC, mostly) in > the building were actually driven off 208 or 480 volt three-phase, provided > by phase-converting transformers and switch gear. There were a handful > 240-volt circuits that were stepped down (or tapped?) from the 480, and a > lot of the lighting was run off the 277-volt phase-to-neutral of the 480 > circuits. The building electricians regarded the two-phase four-wire power > as a damned nuisance. > > Two-phase is surely uncommon in the US, while split-single-phase is > ubiquitous. > > On Sun, Feb 12, 2017 at 6:41 PM, Mike Thompson <miketh...@gmail.com> > wrote: > >> >> >> On Sun, Feb 12, 2017 at 4:34 PM, Warin <61sundow...@gmail.com> wrote: >> >>> On 13-Feb-17 10:25 AM, Tristan Anderson wrote: >>> >>> If two-phase power isn't currently in use anywhere, it simply means we >>> won't see any instances of the tag phases=2, just like how we'll never see >>> phases=17. It doesn't make anything fundamentally wrong with the tagging >>> scheme. I believe this is a good proposal that should be voted on. >>> >>> >>> There will need to be very careful wording of phases=2 to avoid American >>> mappers misusing this tag for 240v split single phase. >>> >> That is my concern. This is a typical mistake. >> >>> I think there will be instances of phase=2 occurring in the USA, >>> possibly many instances. >>> >> Do you mean instances of the tag phase=2, or actual two phase power? >> >> >> _______________________________________________ >> Tagging mailing list >> Tagging@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/tagging >> >> > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > >
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