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Posted By: Frank Cinker Voltage Drop - 08/13/02 12:09 PM
An existing aerial feeder consists of 800 feet of 6AWG and 100 feet of 10AWG. It's 120 volts, single phase. 15amp. load. What is the proper method of determining voltage drop when there are two different size conductors on the same feeder.
I use VD=2KLI/CM
Posted By: Bob Re: Voltage Drop - 08/13/02 10:07 PM
Use the formula the caculate 800 ft of #6 with 15 amps. Do the same for the #10 at 100 ft with 15 amps and add the two together for the total VD.
Posted By: pauluk Re: Voltage Drop - 08/13/02 10:14 PM
I'll second that.

Quote

VD=2KLI/CM

Huh??? [Linked Image]
Posted By: Frank Cinker Re: Voltage Drop - 08/14/02 10:17 AM
pauluk-

VD= Voltage drop
2= length of circuit x "2"
K= K-factor. 12.9 for copper conductor
L= Length of circuit
I= Amps
CM= Circular mill
Posted By: pauluk Re: Voltage Drop - 08/14/02 11:54 AM
Thanks. It was getting late and the CM part just didn't register in my mind for some reason (we don't measure in circular mils here).
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