I ran three separate lines using the magical Belden 83802 two years ago, and constructed PCs of the same. This 12AWG, fully shielded, all-Teflon stuff is VERY expensive by industrial standards ($1600/1000'), but cheap by ours (!).
Much quieter noisefloor yields more delicate detail, more-articulate bass, and hence better perceived "micro"dynamics, with a cleaner top end.
As Schurter recently redesigned they're affordable IEC320 connector to be one of the best, I decided to sell raw BBelden 83802 AND DIY PC Kits very cheaply to fellow Audiogoners ($35/ PC Kit; $2.50/ft raw, $200/100' spool).
I have to get to work, so call or write for detailed ideas about your dedicated lines. Note that this stuff is already code-approved WITHOUT conduit, and is semi-stranded (7x20AWG=12AWG), and of course fireproof (made for fire-alarm wiring), so it's a no-brainer in many ways!
Cheers.
Ernie 781 483-3922