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Yes, beautiful. But I am still trying to figure out if it is NEC
compliant. At first pass, it seems like it is missing a few
disconnecting means.<br>
<br>
<div class="moz-cite-prefix">On 1/3/2015 10:48 AM, Larry wrote:<br>
</div>
<blockquote cite="mid:54A8399B.3030709@starlightsolar.com"
type="cite">
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<div class="moz-cite-prefix">Wow, Jarmo! That is some incredible
workmanship and a great way to interconnect multiple inverters
and chargers. You can tell they have done this a few times.
Thanks for sharing those photos.<br>
<pre class="moz-signature" cols="72">Larry Crutcher
Starlight Solar Power Systems
</pre>
On 1/3/15 9:16 AM, <a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:Jarmo.Venalainen@schneider-electric.com">Jarmo.Venalainen@schneider-electric.com</a>
wrote:<br>
</div>
<blockquote
cite="mid:OFFB5D11E6.3900E959-ON88257DC2.0057DA64-88257DC2.00595E94@US.Schneider-Electric.com"
type="cite"><font face="sans-serif" size="2">Hi:</font> <br>
<br>
<font face="sans-serif" size="2">This link takes you to a site
in Romania so you (likely) wont be able to read the text, but
it does have a lot of good pictures.</font> <br>
<br>
<font face="sans-serif" size="2">This installer has been using
XW since about 2007 and has a tons of experience. I like what
he does with the DC wiring/busbars. The breakers are in the
box below the inverters and charge controllers.</font> <br>
<br>
<a moz-do-not-send="true"
href="http://customer.lpelectric.ro/doc/sibiu2/sibiu2_28kw_fotovoltaic.html"><font
color="blue" face="sans-serif" size="2">http://customer.lpelectric.ro/doc/sibiu2/sibiu2_28kw_fotovoltaic.html</font></a>
<br>
<br>
<font face="sans-serif" size="2">JARMO<br>
</font><font color="#008000" size="3">_____________________________________________________________________________________</font><font
size="3"> <br>
</font><font face="Arial" size="1"><b><br>
Jarmo Venalainen</b> | </font><font color="#008000"
face="Arial" size="1"><b> Schneider Electric </b></font><font
face="Arial" size="1"><b> | Solar Business</b> | <b>CANADA</b>
| <b>Training & Development Specialist - Senior</b> <b><br>
Phone:</b> +604-422-2528 | <b>Fax:</b> +604-420-1591 |
<b>Mobile:</b> +604-505-0291 <b><br>
Email:</b> </font><a moz-do-not-send="true"
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target="_blank"><font color="blue" face="Arial" size="1"><u>
www.SEsolar.com</u></font></a><font face="Arial" size="1">
| <b>Address:</b> 3700 Gilmore Way, Burnaby, BC V5G4M1 <br>
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<br>
<br>
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<tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">From:</font>
</td>
<td><font face="sans-serif" size="1"><a
moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:drake.chamberlin@redwoodalliance.org">drake.chamberlin@redwoodalliance.org</a></font>
</td>
</tr>
<tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">To:</font>
</td>
<td><font face="sans-serif" size="1">"RE-wrenches" <a
moz-do-not-send="true" 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 color="#5f5f5f" face="sans-serif" size="1">Date:</font>
</td>
<td><font face="sans-serif" size="1">01/02/2015 05:18 PM</font>
</td>
</tr>
<tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">Subject:</font>
</td>
<td><font face="sans-serif" size="1">Re: [RE-wrenches]
wire sizing question</font> </td>
</tr>
<tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">Sent
by:</font> </td>
<td><font face="sans-serif" size="1">"RE-wrenches" <a
moz-do-not-send="true" class="moz-txt-link-rfc2396E"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org"><re-wrenches-bounces@lists.re-wrenches.org></a></font></td>
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<br>
<hr noshade="noshade"> <br>
<br>
<br>
<tt><font size="2">4/0 copper is good for a 24V, 4000 W
inverter. What is being used for<br>
multiple inverters?<br>
<br>
I've paralleled 4/0 into outback boxes using 2, 2" PVC
conduits. It gets<br>
pretty messy trying to put 4 sets of 4/0s into enclosures
and battery<br>
boxes (although I have worked on such systems). Does anyone
have clean<br>
solutions for these systems?<br>
<br>
Thanks,<br>
<br>
Drake<br>
<br>
<br>
<br>
<br>
<br>
> Some other things: If you keep the conduit less than
24" long, which is<br>
> recommended anyway for main battery connections, the
conduit fill<br>
> requirements don't apply. (see exception: 310.15(B)3a2)<br>
> Using table 310.15(B)16 yeilds 230 amps for 4/0 at 75
C. Then 240.6<br>
> lists 250 amp as the next standard size of OCPD which
is allowed to be<br>
> used by 240.4(B) So you can just justify 4/0.<br>
> Further, many manufacturers (like Midnite) use the open
air ampacity<br>
> table: 310.15(B)17, since the cable is not "in conduit"
and 4/0 cable at<br>
> 75 C is rated to 360 amps.<br>
> The Free Air interpretation is not completely
substantiated in the code<br>
> from my read of it though. Maybe someone more
knowledgable could cite<br>
> the chapter and verse that defines when the free air
rating can and<br>
> cannot be used.<br>
> Also remember those breakers are 100% duty cycle rated,
and that the<br>
> inverter usually can't run any where close to 250 amps
continuously.<br>
> Bottomline is we've been using 4/0 with 250 amp
breakers for almost 20<br>
> years, and I've never seen or heard of a problem.<br>
><br>
> R.Ray Walters<br>
> CTO, Solarray, Inc<br>
> Nabcep Certified PV Installer,<br>
> Licensed Master Electrician<br>
> Solar Design Engineer<br>
> 303 505-8760<br>
><br>
> On 1/1/2015 7:23 PM, jay peltz wrote:<br>
>> Happy new year all.<br>
>><br>
>> I have a question on wire sizing for the following.<br>
>><br>
>> 250 amp breaker, in a UL enclosure ( say midnite or
outback etc)<br>
>> conduit from battery box to enclosure<br>
>><br>
>> I'm wondering how folks size this for ampacity not
voltage drop.<br>
>><br>
>> thanks<br>
>><br>
>> jay<br>
>><br>
>> peltz power<br>
>><br>
>><br>
>><br>
>><br>
>><br>
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