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Old 11-06-2008   #9 (permalink)
Moog
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Join Date: May 2008
Location: midlands
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Default Re: Problem: Voltage Drop...?

Yeah im confused too are you saying voltage =120volts Current =16Amps length of cable = 600ft = 600*12*25.4 =182880mm = 182.88m resistance of cable =pl / a where p=resistance of Copper l=length of run a=CSA of conductor and using V=IR? What was that about ground? why not just type the whole question as it was posed. All the UK tables are metric and hence the resistance of Cu vairable that we use is based upon this scale. i.e. R of 1 metre of Cu is different to 1ft of Cu even if CSA the same. Ignoring reactance the resistance equation should work but you would have to use your own tables for the specific resistance of copper per unit length. Stranded wire has higher resistance than solid as lower usable CSA. Also ask whomever posed this question whether the borg effect is being taken into account as this will make the resistance futile

Last edited by Moog; 11-06-2008 at 05:19 AM.
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