K2X
Senior Member
- Location
- Colorado Springs
What is the smallest recommended thwn copper conductor to power an 80 amp single phase load located 360ft from a 240 volt service if all lugs are rated 60 degrees c?
So i use Vd =2KIL/ cma, then cma=2kil/vd..
The recomended vd on the feeder side is 3% and 12.9 seems to be K on most of these practice questions so cma=2x12.9x80x360/.03x240=743040/7.2=103200.
So it looks to me like 1/0 with a cma of 105600 would be the answer but the answer sheet says #2. Am I missing something???
Thanks for the help..
So i use Vd =2KIL/ cma, then cma=2kil/vd..
The recomended vd on the feeder side is 3% and 12.9 seems to be K on most of these practice questions so cma=2x12.9x80x360/.03x240=743040/7.2=103200.
So it looks to me like 1/0 with a cma of 105600 would be the answer but the answer sheet says #2. Am I missing something???
Thanks for the help..