<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Any thoughts on how to flash a copper pipe roof penetration on a metal roof. The brazed copper flashing we typically use would cause corrosion with the steel roof I'm afraid. WHat have others used in this situation?</div><br><div apple-content-edited="true"> <span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><div>Troy Harvey</div><div>---------------------</div><div>Heliocentric</div><div>801-453-9434</div><div><a href="mailto:taharvey@heliocentric.org">taharvey@heliocentric.org</a></div></div><br class="Apple-interchange-newline"></span> </div><br><div><div>On Dec 10, 2008, at 11:07 AM, R. Walters wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "> I have a volt drop spreadsheet on our website as well at <a href="http://www.solarray.com/TechGuides/TGmain_T.php">http://www.solarray.com/TechGuides/TGmain_T.php</a> <div>It uses NEC temp correction for resistance, and another temp correction for ampacity. One is based on ambient air temp, and one is wire temp. All calculations are taken directly from the 2005 NEC( don't think wire changed in 2008) Also, it lets you look at various wires at the same time like William's. I don't currently have AC on it, but it's getting cold here, so maybe I'll add that this winter.<div>I hid the ampacity stuff I attempted, since NEC has so many factors to consider, but its still on there, if you unhide all the rows. I also tried to do a sizing based on wire cost thing, but when wire pricing shot up, it threw all that off too. </div><div>You can still use that, you just have to enter your per ft cost for each wire size. The idea was to not spend $1000 putting in 4/0 cable to save $100 worth of solar power.</div><div><br></div><div><br></div><div>Ray</div><div><br></div><div><div><div>On Dec 10, 2008, at 8:16 AM, Wind-sun.com wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">The NEC values are for 75C, but not everything operates at that temperature (167F), nor or all uses of wire under NEC codes. I understand why the spreadsheet is set up for NEC since that covers probably 98% of all uses.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">At room temperature (25C), the resistance values are almost 20% less - the "standard" physics value of #10 AWG is almost exactly 1 ohm per 1000 feet at 26C.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="http://en.wikipedia.org/wiki/American_wire_gauge">http://en.wikipedia.org/wiki/American_wire_gauge</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">..................................................................................................</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Northern Arizona Wind & Sun - Electricity From The Sun</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">..................................................................................................</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">----- Original Message ----- From: "William Miller" <<a href="mailto:wrmiller@charter.net">wrmiller@charter.net</a>></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">To: "RE-wrenches" <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Sent: Tuesday, December 09, 2008 11:48 PM</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Subject: Re: [RE-wrenches] voltage drop</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div> <blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Dear Wind & Sun:</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">What "standard" are you referring to?<span class="Apple-converted-space"> </span>We are using the 75C values from the NEC in order to assure code compliance.<span class="Apple-converted-space"> </span>We need to have a direct link to the NEC in case of compliance or liability issues.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Thanks for asking.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">William Miller</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div> </blockquote><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">List sponsored by Home Power magazine</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; 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Walters</div><div>Solarray.com<span class="Apple-tab-span" style="white-space:pre"></span></div><div>NABCEP # 04170442<span class="Apple-tab-span" style="white-space:pre"><span class="Apple-style-span" style="white-space: pre; "> </span></span></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span> </div><br></div></div></div>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out participant bios:<br>www.members.re-wrenches.org<br><br></blockquote></div><br></body></html>