Feeder Bus Duct Voltage Drop

[dmarchand73]

I am looking for a formula to calculate the voltage drop of a 1600Amp feeder bus duct from the main switchboard to meter stacks. I have a total distance of 150 feet of bus duct.

 

[bob]

Re: Feeder Bus Duct Voltage Drop

Check here
http://www.cda.org.uk/megab2/elecapps/pub22/index.htm

http://www.copper.org/applications/busbar/ampacity/busT4.htm

http://64.90.169.191/resources/pub_list/power-quality.html

[ December 13, 2005, 11:36 AM: Message edited by: bob ]

 

[gregsparky1]

Re: Feeder Bus Duct Voltage Drop

How about....

single phase: Voltage drop = K x L x 2 x I / CM

3 phase: Voltage drop = K x L x 1.732 x I / CM

K = 12.9 for CU and 21.2 for AL
L = length of run
I = amps
CM= cir mils (found in NEC table 8)