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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>We always fill any conduit at the point of
building penetrations for air sealing. Otherwise in winter, not only will the
conduit get house moisture condensing inside of it, but it will act a a nice thermo
siphon for pulling warm air out of the house…..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Wind-sun.com<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, August 25, 2009
11:49 AM<br>
<b><span style='font-weight:bold'>To:</span></b> jryago@netscape.com; <st1:PersonName
w:st="on">RE-wrenches</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [<st1:PersonName
w:st="on">RE-wrenches</st1:PersonName>] raintite box mounting angle</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>It is almost impossible in a normal installation to get a
totally waterproof enclosure.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>What you describe with the flooded box is more common
than people might think. </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>What causes most of that is condensation. Humid air gets
sucked into the enclosure at night or whenever else it cools off. The water
then condenses inside. Next day, the box heats up again and the air expands a
bit again, but the water has already condensed and cannot get out.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>That is why the weep hole as you noted is mandatory,
especially in areas with high humidity. But we have seen this even in the
desert regions of <st1:State w:st="on"><st1:place w:st="on">Arizona</st1:place></st1:State>
and CA, so it can happen anyplace over long periods of time.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>..................................................................................................<br>
<st1:place w:st="on">Northern Arizona</st1:place> Wind & Sun - Electricity
>From The Sun Since 1979<br>
Solar Discussion Forum: <a href="http://www.wind-sun.com/ForumVB/">http://www.wind-sun.com/ForumVB/</a><br>
..................................................................................................</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>----- Original Message ----- <o:p></o:p></span></font></p>
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<p class=MsoNormal style='background:#E4E4E4'><b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span></font></b><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:jryago@netscape.com" title="jryago@netscape.com">Jeff Yago</a> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:kirk@vtsolar.com" title="kirk@vtsolar.com">kirk@vtsolar.com</a> ; <a
href="mailto:re-wrenches@lists.re-wrenches.org"
title="re-wrenches@lists.re-wrenches.org">RE-wrenches</a> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Tuesday, August
25, 2009 8:40 AM<o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Re: [<st1:PersonName
w:st="on">RE-wrenches</st1:PersonName>] raintite box mounting angle<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><br>
I am getting more convinced that there is no such thing as a water-tight
electrical enclosure, regardless of gasket covers and sealed openings. We
always drill a very small "weep-hole" in the bot<st1:PersonName
w:st="on">tom</st1:PersonName> of an enclosure. We have found this
is too small to allow insects to enter, but will drain any leaks or moisture that
gets condensed into a liquid. I was recently called by the owner
of a large pole mounted array (that was installed by another firm ) when
the system stopped working and the originally installer was long
gone. I absolutely swear to you that when I pulled the covers off
several electrical junctions boxes, water POURED out of the
enclosures! I am not talking about wet, I am saying about a quart
of water was being held inside each enclosure by their water-proof
gasketed covers. Needless to say, all of the electrical terminals and
wire connectors inside these junction boxes were badly corroded.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I know they make totally water-proof electrical
equipment for under-water applications, but have found most outdoor rated
electical enclosures will get some water inside and that includes under-ground
conduit. Take some advice and regardless of mounting orientation,
drill a small weep-hole in the bot<st1:PersonName w:st="on">tom</st1:PersonName>
if there is not one provided by the manufacturer.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Jeff Yago<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>DTI Solar<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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