Material Specifications/Layout for AC line

Beatlebum/Tim,

Looks like I might be too late in this thread but I'll put in my 2 cents FWIW:
I used 10AWG romex in-wall wire. After reading a # of threads on A'gon w/ really good info from people like Lak to name just 1 person, by 2nd-hand living what Hbrandt went thru about the same time as I did getting dedicated lines, I decided that boutique in-wall wire was not going to be my pancea hence my choice in romex.
Junction boxes are bakelite & there is no metal conduit carrying the wire to my room => no antenna putting crud on my ground wire! When the electrician was doing the wiring in the main panel, I found that ground & neutral are connected to the same bus! He said that this is normally how it done for homes everywhere in the USA & that only for commercial ops do they separate ground & neutral. I believe that older houses have a water pipe ground connection (which I don't as my house is newer. I must be having a copper-rod-stuck-in-the-Earth ground(?) ).
From Bob Crump's suggestion on AA, I decided to try out romex wire orientation! I found it to make a difference even though it was more on the subtle side. I found that romex run one way had a bigger & deeper soundstage vs. romex run the other way. Of course, this is system dependent so the orientation that works for me might/might not work for you. Anyway, orientation made a diff. for me (contrary to my disbelief when I read Crump's post) & I had the electrician run the wires my preferred way.
The RGPC 400S provides internal parallel AC filtering that benefits my source components & my pre (which doesn't seem to need it as much as Ken S. has put in parallel filtering of his own in the power supply box).
I'm using Pass & Seymour 5362A cryo's outlets from Chris Venhaus with excellent results. The "A" designator in the model # is paramount as that signifies an all-brass Olin #688 construction.
I would have loved to use an isolation xformer like many here are using but the Internal Affairs Secretary @ home would have raised 2 eye-brows @ the cost! W/o the isolation xformer, the cost slipped under her radar! ;-)

Tim,
If your circuit board is only 20' away from your system, you have the opportunity to run straight from the board into your monoblocks. I did this recently with a Krell, and it works great. I bought the parts for the CVH V4, including cryo'd cables, and bought a gold pin Wattgate IEC 20 amp. I then followed the CVH design, and ran the cable straight from the circuit breaker to the amp, without passing through an outlet. There is no circuit protection in a power outlet, so you are not doing anything 'unsafe'. It cuts out a potentially resistive connection, and provides the RFI protection all the way back to the circuit board, instead of just a short way from the outlet to the amp. Parts were quite expensive, since my run was 25', it came to around $300 with the $100 Wattgate. You would need two runs, since you have monoblocks. In this crazy world of audio hell, I can't think of anything that I've done in my system for $300 that sounded better.
As a tip, to get from the basement circuit board into the listening room, I removed the power outlet, and the back-box on the outlet and retained the outlet cover plate...then just passed the cable through the cover plate and into the basement.

Rooze

Um, 20A receptacle(s) on a 30A branch circuit is a violation. (1999 NEC 210-21(b)(1) & (3)). The device is unprotected; no diversity factor as on 20A, multiple receptacle circuits. You should change that 30A C.B. to a 20A, like yesterday.

Re: "noisy household appliances". Unsure about this, except for a cell phone charger and the vacuum cleaner, I don't have any visible (TV) or audible (radio, stereo) indications of such.

The big stuff - clothes dryer, A/C, and range, is 2-phase, so you have no choice on those. Disposall, dishwasher, clothes washer, and furnace is all on the famous Dedicated Circuits. Basic NEC Article 210 stuff. The vast majority of the time, all that stuff is O-F-F.

Loading all audio stuff on one phase or the other is much ado 'bout nothing. The downside is that you'll load up one phase much more than the other - another NEC violation - and you possibly may end up with a voltage drop problem on that phase.

I might experiment w/ digital & analog circuits on different phases, but I wouldn't hold my breath on that.