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VERY nice example, Jarmo !<br>
<br>
Hey, one day, probably after we are all gone, maybe everybody will
be using high temperatue<br>
superconductors and we won't have to worry about wire size any
more.<br>
<br>
If they can make them work well with AC....<br>
<br>
boB<br>
<br>
On 12/2/2014 4:26 PM, <a class="moz-txt-link-abbreviated" href="mailto:Jarmo.Venalainen@schneider-electric.com">Jarmo.Venalainen@schneider-electric.com</a>
wrote:<br>
</div>
<blockquote
cite="mid:OF499AA91E.171E9D71-ON88257DA3.00022874-88257DA3.000265FF@US.Schneider-Electric.com"
type="cite"><font size="2" face="sans-serif">Hi:</font>
<br>
<br>
<font size="2" face="sans-serif">Look at it this way,</font>
<br>
<br>
<font size="2" face="sans-serif">The three conductors in parallel
can
handle more current because they have more surface area with
which to dissipate
heat. Or to put it another way, the heat from the middle of the
thick
975 kCM cant get out and so the wire stays hotter.</font>
<br>
<br>
<font size="2" face="sans-serif">See picture,</font>
<br>
<br>
<img src="cid:part1.01090209.07050808@midnitesolar.com">
<br>
<br>
<font size="2" face="sans-serif">JARMO<br>
</font><font size="3" color="#008000">_____________________________________________________________________________________</font><font
size="3">
<br>
</font><font size="1" face="Arial"><b><br>
Jarmo Venalainen</b> | </font><font size="1" face="Arial"
color="#008000"><b>
Schneider Electric </b></font><font size="1" face="Arial"><b>
| Solar
Business</b> | <b>CANADA</b> | <b>Training &
Development Specialist - Senior</b> <b><br>
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<br>
<table width="100%">
<tbody>
<tr valign="top">
<td><font size="1" face="sans-serif" color="#5f5f5f">From:</font>
</td>
<td><font size="1" face="sans-serif">Larry
<a class="moz-txt-link-rfc2396E" href="mailto:larry@starlightsolar.com"><larry@starlightsolar.com></a></font>
</td>
</tr>
<tr valign="top">
<td><font size="1" face="sans-serif" color="#5f5f5f">To:</font>
</td>
<td><font size="1" face="sans-serif">RE-wrenches
<a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a>,
</font>
</td>
</tr>
<tr valign="top">
<td><font size="1" face="sans-serif" color="#5f5f5f">Date:</font>
</td>
<td><font size="1" face="sans-serif">12/02/2014 03:30 PM</font>
</td>
</tr>
<tr valign="top">
<td><font size="1" face="sans-serif" color="#5f5f5f">Subject:</font>
</td>
<td><font size="1" face="sans-serif">Re: [RE-wrenches]
Parallel Wire combining</font>
</td>
</tr>
<tr valign="top">
<td><font size="1" face="sans-serif" color="#5f5f5f">Sent
by:</font>
</td>
<td><font size="1" face="sans-serif">"RE-wrenches"
<a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches-bounces@lists.re-wrenches.org"><re-wrenches-bounces@lists.re-wrenches.org></a></font></td>
</tr>
</tbody>
</table>
<br>
<hr noshade="noshade">
<br>
<br>
<br>
<font size="3">Hey boB,<br>
<br>
This is the reference table I was using. They show 325 AWG and
325kCM refer
to the same diameter cable but I should have used kcm for
clarity. <br>
<br>
If all insulation/temp rating is the same we are back to my
original question.
Anyone else able to explain this? To be safe I am leaning toward
using
the combined CM number to size for current rather than 3 times
the ampacity
as that just makes no sense to me. <br>
<br>
</font><img src="cid:part6.09020004.00090504@midnitesolar.com"
width="753" height="658"><font size="3"><br>
On 12/2/14 3:54 PM, </font><a moz-do-not-send="true"
href="mailto:boB@midnitesolar.com"><font size="3" color="blue"><u>boB@midnitesolar.com</u></font></a><font
size="3">
wrote:</font>
<br>
<font size="3"><br>
The "area" of the conductor will be 3 times and you would think
that the NEC Ampacity would also be 3 times<br>
that of one conductor. But one LARGE conductor with the same
area might not be as high as you think<br>
because of insulation. I would think that ampacity of 3 cables
in
parallel would be 3 times. But probably<br>
not when you take a single cable of the 3X area out of the NEC
table.
(I haven't looked at this to verify)<br>
<br>
Also, Larry, 325 AWG 750 AWG (gauge) wire is a bit too small
for this, don't you think ?<br>
<br>
I know... You mean circular mils...<br>
boB<br>
<br>
</font>
<br>
<br>
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