<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML xmlns:v = "urn:schemas-microsoft-com:vml" xmlns:o =
"urn:schemas-microsoft-com:office:office"><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.6000.16757" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV>
<DIV><FONT face=Arial size=2>Marco,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I use the following formulas:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>single-phase Vd = (I x L x
R x 2)/1000</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial
size=2>3-phase
Vd = (1.73 x I x L x R)/1000</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>L = one-way length</FONT></DIV>
<DIV><FONT face=Arial size=2>R = resistance of conductor from Table 8 (usually
from uncoated copper ohm/kFT column)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Mike</FONT></DIV>
<DIV><FONT face=Arial size=2>Michael Gullo</FONT></DIV>
<DIV><FONT face=Arial size=2>Solar Solutions LLC</FONT></DIV>
<DIV><FONT face=Arial size=2>Marlton, NJ</FONT></DIV>
<DIV><FONT face=Arial size=2>NABCEP Certified PV Installer ™</FONT></DIV>
<DIV><FONT face=Arial size=2><A
href="mailto:mgullo@solarsolutionsnj.com">mgullo@solarsolutionsnj.com</A></FONT></DIV>
<DIV> </DIV></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=marco@pvthawaii.com href="mailto:marco@pvthawaii.com">Marco</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, December 08, 2008 5:12
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [RE-wrenches] voltag drop</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=950391022-08122008><FONT face=Arial size=2>I feel kinda
foolish in asking this.....but when calculating voltage drop in a conductor
over distance, do I use the one-way or round-trip
distance?</FONT></SPAN></DIV>
<DIV><SPAN class=950391022-08122008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=950391022-08122008><FONT face=Arial
size=2>thanks,</FONT></SPAN></DIV>
<DIV><SPAN class=950391022-08122008><FONT face=Arial
size=2>marco</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV class=Section1><IMG height=57
src="cid:DE1968DBF46E4274BA8CDC186ABE681B@Study" width=192
v:shapes="_x0000_i1025">
<P></P><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN>
<P align=left><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Marco
Mangelsdorf, Ph.D.</SPAN>, <SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">President</SPAN> <SPAN
style="mso-spacerun: yes"> </SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Electrical Contractor License
C-26351</SPAN> <BR><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">69
Railroad Avenue, Suite A-7</SPAN> <BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hilo, Hawaii 96720 USA</SPAN>
<BR><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">(808) 969-3281, fax
934-7462</SPAN></P>
<P align=left><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><A
href="http://www.provisiontechnologies.com">www.provisiontechnologies.com</A></SPAN></P>
<P align=left><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><v:shapetype
id=_x0000_t75 coordsize="21600,21600" o:preferrelative="t" o:spt="75"
filled="f" stroked="f" path=" m@4@5 l@4@11@9@11@9@5 xe"> <v:stroke
joinstyle="miter"></v:stroke><v:formulas><v:f
eqn="if lineDrawn pixelLineWidth 0 "></v:f><v:f eqn="sum @0 1 0 "></v:f><v:f
eqn="sum 0 0 @1 "></v:f><v:f eqn="prod @2 1 2 "></v:f><v:f
eqn="prod @3 21600 pixelWidth "></v:f><v:f
eqn="prod @3 21600 pixelHeight "></v:f><v:f eqn="sum @0 0 1 "></v:f><v:f
eqn="prod @6 1 2 "></v:f><v:f eqn="prod @7 21600 pixelWidth "></v:f><v:f
eqn="sum @8 21600 0 "></v:f><v:f eqn="prod @7 21600 pixelHeight "></v:f><v:f
eqn="sum @10 21600 0 "></v:f></v:formulas><v:path o:extrusionok="f"
gradientshapeok="t" o:connecttype="rect"></v:path><o:lock v:ext="edit"
aspectratio="t"></o:lock></v:shapetype></P></SPAN></SPAN>
<P align=left><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN> </P>
<P align=left><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN> </P>
<P align=left><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN> </P>
<P align=left><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN> </P>
<P align=left><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN> </P>
<P align=left><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"> </P><FONT
face=Arial size=2></FONT></SPAN></FONT></DIV>
<DIV> </DIV>
<P>
<HR>
<P></P>_______________________________________________<BR>List sponsored by
Home Power magazine<BR><BR>List Address:
RE-wrenches@lists.re-wrenches.org<BR><BR>Options &
settings:<BR>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<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></BODY></HTML>