Hi,
I was wondering if the NEC permits downsizing the neutral in a feeder on a 1 phase 120/240 system when it primarily feeds 240 v motors? I have ~35 amps @ 240v in motors going on a feeder of #6 copper on a 70A breaker. Does this mean that I could downsize the neutral (to a #8) to carry a load of the remaining 35 amps for 120v loads? Or is this not allowed?
I don't normally try to skimp on this sort of thing, but I am forced to pull a feeder through 1" PVC sch 80 for 125' that probably has 360 degrees of bends in it. Every little bit counts. I need to fit 3#6, 1#8 (EGC) and 4#12 (control wiring) in to this thing. Am I crazy? The calcs work out to less than 40% fill, but I am still worried that this will be tough. Any comments? This is for a pool, original installers 15 years ago pulled in 12 #12 instead of a feeder, ignoring derating, worked for a while, but now a subpanel is needed near pool equipment.
Thanks for any help, Mike
[This message has been edited by mhulbert (edited 01-05-2005).]
