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<div class="moz-cite-prefix">On 13-Feb-17 10:25 AM, Tristan Anderson
wrote:<br>
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<p>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.</p>
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<p><font face="Times New Roman" size="+1">There will need to be very
careful wording of phases=2 to avoid American mappers misusing
this tag for 240v </font><font face="Times New Roman" size="+1">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.<br>
</font></p>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
Mike Thompson <a class="moz-txt-link-rfc2396E" href="mailto:miketho16@gmail.com"><miketho16@gmail.com></a><br>
<b>Sent:</b> February 12, 2017 6:07 PM<br>
<b>To:</b> Tag discussion, strategy and related tools<br>
<b>Subject:</b> Re: [Tagging] Feature Proposal - RFC -
Power pole extension</font>
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<div dir="ltr">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]
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<div>[1] <a moz-do-not-send="true"
href="https://en.wikipedia.org/wiki/Two-phase_electric_power"
id="LPlnk12043" previewremoved="true">https://en.wikipedia.org/wiki/Two-phase_electric_power</a></div>
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id="ImageCell_14869416102410.26996709528041074"
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style="background-color: rgb(255, 255, 255);
height: 120px; position: relative; margin:
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<a moz-do-not-send="true"
id="LPImageAnchor_14869416102430.5792358564418465"
href="https://en.wikipedia.org/wiki/Two-phase_electric_power"
target="_blank" style="display: table-cell;
text-align: center;"><img
moz-do-not-send="true" aria-label="Preview
image with link selected. Double-tap to
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id="LPThumbnailImageID_14869416102430.5467042398566202"
style="display: inline-block; max-width:
250px; max-height: 250px; height: 120px;
width: 250px; border-width: 0px;
vertical-align: bottom;"
src="http://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Elementary_Two_Phase_Alternator.jpg/400px-Elementary_Two_Phase_Alternator.jpg"
height="120" width="250"></a></div>
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<a moz-do-not-send="true"
id="LPUrlAnchor_14869416102460.37519261217101585"
href="https://en.wikipedia.org/wiki/Two-phase_electric_power"
target="_blank" style="text-decoration:
none;">Two-phase electric power - Wikipedia</a></div>
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id="LPMetadata_14869416102460.01865055497844814"
style="margin: 10px 0px 16px; color: rgb(102,
102, 102); font-weight: normal; font-family:
wf_segoe-ui_normal, "Segoe UI",
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en.wikipedia.org</div>
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id="LPDescription_14869416102480.04665906993072766"
style="display: block; color: rgb(102, 102,
102); font-weight: normal; font-family:
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20px; max-height: 100px; overflow: hidden;">
Two-phase electrical power was an early
20th-century polyphase alternating current
electric power distribution system. Two
circuits were used, with voltage phases ...</div>
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<div class="gmail_extra"><br>
<div class="gmail_quote">On Sun, Feb 12, 2017 at 2:14 PM,
Warin <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:61sundowner@gmail.com" target="_blank">61sundowner@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex; border-left:1px #ccc solid; padding-left:1ex">
<br>
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.
<div class="HOEnZb">
<div class="h5"><br>
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<br>
On 13-Feb-17 07:27 AM, <a moz-do-not-send="true"
href="mailto:ajt1047@gmail.com" target="_blank">ajt1047@gmail.com</a>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0
0 .8ex; border-left:1px #ccc solid;
padding-left:1ex">
On 12/02/2017 20:07, Mike Thompson wrote:<br>
<blockquote class="gmail_quote" style="margin:0
0 0 .8ex; border-left:1px #ccc solid;
padding-left:1ex">
Jherome,<br>
<br>
... 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.<br>
<br>
<br>
</blockquote>
<br>
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?<br>
<br>
Best Regards,<br>
<br>
Andy<br>
<br>
(who hasn't actually done any 3-phase wiring in
40 years, so it might have changed a bit since
then!)<br>
<br>
<br>
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