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. This is common
household wiring for 'hi power' ... 115 v 10 a only gets you 1.15 kw ..
so for things like stoves 240 v is required. I think there will be
instances of phase=2 occurring in the USA, possibly many instances.
------------------------------------------------------------------------
*From:* Mike Thompson <miketh...@gmail.com>
*Sent:* February 12, 2017 6:07 PM
*To:* Tag discussion, strategy and related tools
*Subject:* Re: [Tagging] Feature Proposal - RFC - Power pole extension
After a little digging, it seems that there *was* at one time such a
thing as two phase electric power, with the phases 90 degrees apart[1]
[1] https://en.wikipedia.org/wiki/Two-phase_electric_power
<https://en.wikipedia.org/wiki/Two-phase_electric_power>
Two-phase electric power - Wikipedia
<https://en.wikipedia.org/wiki/Two-phase_electric_power>
en.wikipedia.org
Two-phase electrical power was an early 20th-century polyphase
alternating current electric power distribution system. Two circuits
were used, with voltage phases ...
On Sun, Feb 12, 2017 at 2:14 PM, Warin <61sundow...@gmail.com
<mailto:61sundow...@gmail.com>> wrote:
I think the incorrect term '2 phase' is the split single phase (or
single phase 3 wire) that the Americans use, 120 v from 'neutral'
to either line but 240 v from line to line and that 240 v is
termed '2 phase' despite the fact that it is a single phase. All
of these lines are supposed to float - no connection to earth is
supposed to be made.
On 13-Feb-17 07:27 AM, ajt1...@gmail.com
<mailto:ajt1...@gmail.com> wrote:
On 12/02/2017 20:07, Mike Thompson wrote:
Jherome,
... Having spent some time in the electrical industry (in
the U.S.) my understanding is there is no such thing as "2
phase", only single phase and three phase.
In terms of supply to premises, you're going to get single
phase or 3-phase, but I think that you can still get minor
power lines carrying just 2 phases (e.g. to 2 houses, each
single phase) can't you?
Best Regards,
Andy
(who hasn't actually done any 3-phase wiring in 40 years, so
it might have changed a bit since then!)
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