<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span><span class="Apple-style-span" style="color: rgb(69, 69, 69); font-family: Arial, Helvetica, sans-serif; font-size: 12px; ">Wrenches,</span></span></div><div><span><span class="Apple-style-span" style="color: rgb(69, 69, 69); font-family: Arial, Helvetica, sans-serif; font-size: 12px; "><br></span></span></div><div><span><span class="Apple-style-span" style="color: rgb(69, 69, 69); font-family: Arial, Helvetica, sans-serif; font-size: 12px; ">I'm looking at a potential battery backup system wtih a 200 AH @48V flooded battery bank in the basement electrical room of a 3 story building. There is a window in the electrical room. The batteries will be located about 10' from an outdoor wall. The building is all reinforced concrete, so I can not run a vent pipe vertically from the batteries. Does anyone have a rule of thumb
for how much the vent pipes can be angled from the batteries? Would it be more lenient for short sections of pipe (say <2') versus one long angled piece from the batteries? My instinct would be to keep the pipe no more than 45˚ from plumb.</span></span></div><div><span><span class="Apple-style-span" style="color: rgb(69, 69, 69); font-family: Arial, Helvetica, sans-serif; font-size: 12px; "><br></span></span></div><div><span><span class="Apple-style-span" style="color: rgb(69, 69, 69); font-family: Arial, Helvetica, sans-serif; font-size: 12px; ">Or with bending the vent pipe: does anyone have a best-practice rule for the sum of the angles of bends?</span></span></div><div><span><span class="Apple-style-span" style="color: rgb(69, 69, 69); font-family: Arial, Helvetica, sans-serif; font-size: 12px; "><br></span></span></div><div><span><span class="Apple-style-span" style="color: rgb(69, 69, 69); font-family: Arial, Helvetica, sans-serif;
font-size: 12px; ">Thanks,</span></span></div><div><span><span class="Apple-style-span" style="color: rgb(69, 69, 69); font-family: Arial, Helvetica, sans-serif; font-size: 12px; ">Jeffrey Quackenbush</span></span></div><div><span><span class="Apple-style-span" style="color: rgb(69, 69, 69); font-family: Arial, Helvetica, sans-serif; font-size: 12px; ">NABCEP Certified PV Installer</span></span></div><div><span><span class="Apple-style-span" style="color: rgb(69, 69, 69); font-family: Arial, Helvetica, sans-serif; font-size: 12px; ">Peripatetic Solar Technician</span></span></div><div><br></div> <div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "> <div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Drake <drake.chamberlin@redwoodalliance.org><br> <b><span style="font-weight:
bold;">To:</span></b> re-wrenches@lists.re-wrenches.org <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, December 31, 2011 8:08 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> [RE-wrenches] Pole Mount PVC<br> </font> <br>
<div id="yiv727220883">
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Hello Wrenches,<br><br>
With pole mount systems, It looks cleaner and is safer to run the PVC
conduit down the pole into the concrete, and use a 90 degree elbow to
come out through the side of the anchor underground. This way, the
pipe is protected from mechanical damage, and there is nothing to trip
over when adjusting the array for seasonal tilt. <br><br>
I was told that some building departments will not allow this. Has
anyone had a problem with using this method, either technical or
legal? How do you like to route your conduits?<br><br>
Thank you,<br><br>
Drake <br>
<div>
<font size="2">Drake
Chamberlin
<br>
ATHENS ELECTRIC LLC<br>
OH License
44810 <br>
CO license 3773<br>
NABCEP Certified PV<br>
</font></div></div>
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