Marco, I use the following formulas:
single-phase Vd = (I x L x R x 2)/1000 3-phase Vd = (1.73 x I x L x R)/1000 L = one-way length R = resistance of conductor from Table 8 (usually from uncoated copper ohm/kFT column) Mike Michael Gullo Solar Solutions LLC Marlton, NJ NABCEP Certified PV Installer T [EMAIL PROTECTED] ----- Original Message ----- From: Marco To: [email protected] Sent: Monday, December 08, 2008 5:12 PM Subject: [RE-wrenches] voltag drop 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? thanks, marco Marco Mangelsdorf, Ph.D., President Electrical Contractor License C-26351 69 Railroad Avenue, Suite A-7 Hilo, Hawaii 96720 USA (808) 969-3281, fax 934-7462 www.provisiontechnologies.com ------------------------------------------------------------------------------ _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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