figure out voltage drop for a parallel run.

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msilva

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figure out voltage drop for a parallel run.

I am running parallel 500 MCM copper run 624 feet in lenght ...Need to figure out the voltage drop with a 120/208 volt 3 phase system ..Please give the formula or where I can find it....thank you
 
Re: figure out voltage drop for a parallel run.

Re: figure out voltage drop for a parallel run.

You will need to know the expected load that will be on these conductors before a voltage drop can be figured.
 
Re: figure out voltage drop for a parallel run.

Re: figure out voltage drop for a parallel run.

it will be a 600amps main circuit breaker....
 
Re: figure out voltage drop for a parallel run.

Re: figure out voltage drop for a parallel run.

Vd = 1.732 x I x D x Rf

Rf = Resistance per foot (From chapter 9, table 8, ohms/kFT devided by 1000)
D = distance
I = Current
Vd = Voltage drop

Divide Vd by 2 for equal size parallel conductors.

I get 8.6 volts or 4.1%.
 
Re: figure out voltage drop for a parallel run.

Re: figure out voltage drop for a parallel run.

Cool toy. I book marked it.

Edit: No mention of parallel though.

And it's not as accurate as what I posted. (At least based on table 8)

[ March 18, 2005, 02:46 AM: Message edited by: physis ]
 
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