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<div class="moz-cite-prefix">Hey Carl;<br>
<br>
That's my spread sheet! Glad it was useful on the other side of
the world. William and I have discussed the development of these
wire sizing spread sheets for years, including adding temp
compensation. I recently did a full blown upgrade with current
calculations that corresponded to NEC 2011, alas that computer was
taken, before I ever backed it up. Maybe I should take another
stab at it. I'll incorporate your metric info too. I guess this
is what they call "open source" development.<br>
<br>
Ray Walters<br>
Solarray, Inc. (now in Denver)<br>
<br>
On 2/3/2013 9:48 PM, Carl Emerson wrote:<br>
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<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue">Hi William,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue">I am unsure what
others refer to, I have
used the attached spreadsheet in the past, I think it
originates from New
Mexico. I have added a reference to cross sectional area.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue">On the issue if
resistance, I wonder how
much cable is pure copper these days, we see a lot of
cheap cable out of Asia
that very likely has additives. I am guessing that one
might need to go back to
the supplier to be sure of resistance if that were
possible.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue">You will see in the
spreadsheet reference
to NEC 2005, chapter 9, table 8 – this is very
comprehensive and includes
resistance – among other places, it can be found nicely
laid out here…<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><a
moz-do-not-send="true"
href="http://www.buildmyowncabin.com/nec/nec2005_chap9_table8.html">http://www.buildmyowncabin.com/nec/nec2005_chap9_table8.html</a><o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue">This is good for DC
only I believe.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue">I could ask contacts
I have in Germany
what they use, I would guess they have it tied down to the
last ohm…<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue">Hope this helps<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="black"><span
style="font-size:
12.0pt;font-family:Arial;color:black">Regards<br>
Carl Emerson</span></font><font face="Arial"><span
style="font-family:Arial"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size:
12.0pt">Carl:<br>
<br>
You are very welcome. <br>
<br>
I'd be willing to provide a metric chart. I need some
information to get
started. In the US, practices are dictated by our NEC
which provides the
resistance values for standard wire gauges. By putting
the values in the
Code, it gives all parties a reference and (hopefully)
avoids arguments about
conflicting data.<br>
<br>
I downloaded the New Zealand Electrical Code of Practice
(NZECP 51:2004) and
did not find in it any resistance values. Is this the
correct document to
look in? Are resistance values in there and I am just not
finding
them? If the values are not in the NZECP, where do
professionals in New
Zealand look for the resistance values?<br>
<br>
There is a slight difference in resistance (impedance)
between AC and DC
circuits as listed in the NEC. I used the higher values
to allow
conformity in all cases. Let me know if there is a
different
consideration for AC versus DC in New Zealand.<br>
<br>
Do you know what other Metric based nations use for
determining wire resistance
values?<br>
<br>
Thanks in advance.<br>
<br>
William Miller<br>
<br>
<br>
At 04:32 PM 2/3/2013, Carl Emerson wrote:<br>
<br>
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="3" color="blue"><span
style="font-size:
12.0pt;font-family:Arial;color:blue">Hi William,<br>
<br>
Just a comment on the spreadsheet.<br>
<br>
You have made provision for Centigrade, being friendly to
those outside USA.<br>
<br>
It would be nice to have reference to wire cross sectional
area in mm² as AWG
is foreign to lots of folks from outside the US who
reference your site.<br>
<br>
I must say that your making information freely available
over the years has
assisted many.<br>
<br>
</span></font><font face="Arial"><span
style="font-family:Arial">Regards<br>
Carl Emerson<br>
</span></font><font face="Arial" size="1" color="white"><span
style="font-size:7.5pt;
font-family:Arial;color:white"> <br>
<img id="_x0000_i1025"
src="cid:part2.05000807.00040706@solarray.com"
alt="fcb06a.jpg" height="112" width="628" border="0"></span></font><br>
<font face="Arial" size="2" color="white"><span
style="font-size:10.0pt;font-family:
Arial;color:white"> 022 630 9689<br>
<a moz-do-not-send="true"
href="mailto:carl@solarking.net.nz">carl@solarking.net.nz</a><br>
solarking.net.nz<br>
PO Box 305-130,<br>
Triton Plaza,<br>
Auckland 0757 <br>
</span></font><font face="Arial" color="blue"><span
style="font-family:Arial;
color:blue"> <o:p></o:p></span></font></p>
<div class="MsoNormal" style="text-align:center" align="center"><font
face="Arial" size="3" color="blue"><span
style="font-size:12.0pt;font-family:Arial;
color:blue">
<hr size="2" width="100%" align="center">
</span></font></div>
<p class="MsoNormal"><b><font face="Tahoma" size="2"><span
style="font-size:10.0pt;
font-family:Tahoma;font-weight:bold">From:</span></font></b><font
face="Tahoma" size="2"><span
style="font-size:10.0pt;font-family:Tahoma">
<a class="moz-txt-link-abbreviated" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a> [<a
moz-do-not-send="true"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org"
eudora="autourl">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>]
<b><span style="font-weight:bold">On Behalf Of </span></b>William
Miller<br>
<b><span style="font-weight:bold">Sent:</span></b> 4
February 2013 12:06 p.m.<br>
<b><span style="font-weight:bold">To:</span></b>
RE-wrenches<br>
<b><span style="font-weight:bold">Subject:</span></b> Re:
[RE-wrenches] Wire
sizing calculator online<br>
</span></font> <br>
Todd:<br>
<br>
Thanks for the plug. The copy you have is outdated. Here is
where
you will find the new and improved version: <a
moz-do-not-send="true"
href="http://millersolar.com/MillerSolar/Resources/_Resources.html"
eudora="autourl">http://millersolar.com/MillerSolar/Resources/_Resources.html</a><br>
<br>
What we created in the Miller Solar wire sizing spreadsheet is
an opportunity
to compare the voltage drop for all common wire sizes in one
view so you can
evaluate the tradeoffs for various scenarios.<br>
<br>
Questions or comments are appreciated.<br>
<br>
William Miller<br>
<br>
<br>
<br>
At 09:54 PM 2/1/2013, <a class="moz-txt-link-abbreviated" href="mailto:toddcory@finestplanet.com">toddcory@finestplanet.com</a> wrote:<br>
<br>
<br>
<font face="Arial" size="2"><span
style="font-size:10.0pt;font-family:Arial">thank
you... this is useful. do you have william millers
calculator too? its attached
in case you dont.<br>
<br>
<br>
<br>
todd<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
On Friday, February 1, 2013 5:23pm, "Solarguy"
<a class="moz-txt-link-rfc2396E" href="mailto:ntrei@1scom.net"><ntrei@1scom.net></a> said:<br>
<br>
I stumbled onto this wire sizing calculator that gives NEC
qualified data. <br>
Wikipedia had a link to it.<br>
<a moz-do-not-send="true"
href="http://www.cablesizer.com/">http://www.cablesizer.com/</a><br>
Jim Duncan<br>
North Texas Renewable Energy Inc<br>
<a moz-do-not-send="true" href="http://www.ntrei.com/">www.ntrei.com</a>
<br>
NABCEP PV 031310-57<br>
TECL-27398<br>
<a moz-do-not-send="true" href="mailto:ntrei@1scom.net">ntrei@1scom.net</a>
<br>
817.917.0527<br>
<img moz-do-not-send="true" id="_x0000_i1027"
src="cid:image002.jpg@1359784444.2116" alt="NABCEP Logo"
height="32" width="32" border="0"><br>
</span></font><br>
<br>
<br>
Sent from Finest Planet WebMail.<br>
<br>
<br>
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