cable selection

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Anonymous Poster	cable selection 07/31/2008 5:32 AM
	please give me formular to use in determining the voltage drop of a cable
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TVP45 Guru Join Date: Jul 2007 Posts: 4448 Good Answers: 143	#1 Re: cable selection 07/31/2008 5:55 AM
	V=IZ where V is the Voltage drop, I is the current, and Z is the impedance. __________________ "Well, I've wrestled with reality for 35 years, Doctor, and I'm happy to state I finally won out over it." Elwood P. Dowd
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#2 Re: cable selection 07/31/2008 6:06 AM
	British Standard 7671. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Epke Guru Join Date: Sep 2007 Location: Japan Posts: 2703 Good Answers: 38	#3 Re: cable selection 08/01/2008 12:02 AM
	R = length * Rho / diameter (ρ (rho) = resistance per meter per square millimeter of copper wire (0,0175) so V_drop= I*R_cableThen V_source - V_drop = Voltage at end of the cable oh and i also usually forget to count returning cable __________________ From the Movie "The Big Lebowski" Don't pee on the carpet man!
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44mEurope Power-User Join Date: Nov 2006 Location: antwerp/belgium/europe Posts: 160 Good Answers: 5	#4 In reply to #3 Re: cable selection 08/01/2008 2:16 AM
	Yes, I totally agree, Epke. Our American brothers will have to convert to feet, arm-thickness, stone-throws, battery-bags, etc... but the formula is absolutely right ! __________________ 44mEurope
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Noorirm Active Contributor Join Date: Jun 2008 Posts: 24	#5 Re: cable selection 08/01/2008 7:29 AM
	Dear Guest. It is necessary to read the British standard 7671. Normaly the value of the applied voltage and the type of the cable and the distance with the value of Z are effected the voltage droop in cable so that I agree with EPKE in his idea. Noori
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44mEurope (1); Epke (1); Noorirm (1); PWSlack (1); TVP45 (1)

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