[RE-wrenches] voltag drop

[Michael Gullo]

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
mgullo at solarsolutionsnj.com

  ----- Original Message ----- 
  From: Marco 
  To: re-wrenches at lists.re-wrenches.org 
  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

   
















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