Choice of Wire for Dedicated Line

Lak, thanks for your work as recall when I tested various duplexes over a decade ago it was like watching paint dry......10ga Romex is highly inductive and best to just install it and use all that inductance to separate digital from analog gear using separate lines on the same phase. RF is best treated externally with a box of caps across the line.....

I agree with Lak and Rcrump. Having dedicated lines of around 30A (for the 230V supply here) appears from my experience to be all that is required in the wall - OFC etc makes no discernable difference. Using 5 to 10 feet of good power cord seems to do the rest. Note that having dedicated lines will accentuate the differences between good PCs and stock PCs. Using significantly longer lengths of power cord or more costly cable in the wall have no great effect. One often overlooked issue is that even the standard Romex is VERY directional. Try it both directions before you put it in the wall. The difference is large - so don't gamble. A further overlooked issue is the mains fuse. A poor mains fuse will do more damage than any noise the cable will pick up. The best in my opinion are the ceramic fuses. The glass ones are hopeless. The breakers sound OK until they get 6 months or more old. One of the big advantages of the ceramic fuses is also you can take them out and clean and tighten the contacts. This makes a big difference, as does getting you electricity supplier out to clean and tighten the contacts where your drop feeder is joined. An then there is the grounding arrangement...

I would use 10 gauge romex.

Chuck

I recall reading here on Audiogon about an "industrial grade" cable that is superior to Romex and designed for industrial/commercial settings. (Actually, I read about it soon after I ran 10-gauge Romex for my dedicated lines, and have stayed with the Romex.)

Redkiwi:
You raise several points that I do not recall having seen in previous threads, or that..speaking for myself..I would like to hear you elaborate upon....
..having dedicated lines will accentuate the differences between stock and good PCs
..Romex is VERY directional
..your experience with and selection of grounding arrangements
Thank You