Earlier I wrote:
...I'm convinced enough that for my new headphone setup I'm going to run two dedicated circuits with audiophile grade 12 gauge wire from my breaker box, terminating with Furutech outlets - and ground wires for each new receptacle not going to my breaker box but out the crawl space vent (the run is short) to their own dedicated copper ground rods...
Upon FUTHER REVIEW, and as my younger sister used to occasionally tell her children (and me for that matter),
"DON'T DO IT!"
I finally read just a little more about isolating the ground from your one or two dedicated circuits and your circuit breaker box. A couple of points were made that others might elaborate upon, but here is enough partial understanding for me to continue to pursue running dedicated circuits utilizing a "specially formulated" 12-2 plus ground wire (for example, DH Labs makes one which sells for $8/LF), terminating with Furutech, or similar, receptacles. BUT, I feel I must abandon the idea of isolating my receptacle's ground from the main common ground in my circuit breaker box (the one to which every other noise-introducing circuit in my whole house is connected). (I don't understand all of this, but "common" seems to be the imperative term here.)
1) I don't always do what the authorities recommend, sometimes they know little about what they are telling me to do. In this case, in America it seems to be against the electrical code in probably every state and municipality to not have all the power receptacles (and everything else) fed by one's circuit breaker box grounded to the common ground for the whole house, contained in that same circuit breaker box.
1b) Sometimes I "do it anyway." In this case, IF lightning struck my mid-priced suburban house and IF it burned down and IF the insurance company balked at paying because the cause of the fire might have been attributed to having two separate grounds for the electrical system in my house - I'll take a risk now and again, but, even in the pursuit of better sound, perhaps not for the entire value of my home.
2) I didn't spend enough time learning enough to write a doctoral dissertation about this, but it seems if the ground for a dedicated power supply for one's headphone system is not grounded back to the circuit breaker box -
the circuit breaker for your dedicated line won't trip as it should. Under extreme loads it might trip, but by then you've fried between $1000 and $10,000 worth of electronics.
3) Kind of the way I understand it: if lightning does strike your house and a large (usually colossal) current runs through your house's wiring, and the dedicated line is not grounded to the same grounding location in your circuit breaker box as all the other wiring in the house, to "close the loop" the current will try and travel between the two ground rods (which may be 30' or 100' apart) - without success. No effective common ground, large electrical malfunction, some have written it is statistically not a bad way to accidentally get one's self killed, or like I said before, at the least burn down your house.
Point three is probably not 100% technically correct, but I did get the idea that having a power supply coming from one location and not grounding it back to that same location introduces a statistically significant - as opposed to one in a million - risk to both your life and your pocketbook.
SO! I didn't read on about this possible work-around as I'm pushed for time (not that it shows here):
Perhaps one could run an
additional ground wire from their dedicated duplex receptacle to a
new ground rod, in addition to leaving the existing ground wire to my breaker box in place. Before I install my dedicated line I'll read more. Seemingly though, the simple solution in hi-fi audio is never viable; actually workable solutions are almost always more complicated and a lot more expensive.
CONCLUSION: If you are considering ways to "better" ground your dedicated duplex outlet, grounding the receptacle to its own copper ground rod instead of the breaker box introduces risks you really need to understand, and overcome (
if that is even possible), before proceeding.
Here is a link to an article that I found interesting - even the author, and Nordost, seem to have backed away from installing a separate ground ONLY for a dedicated circuit. The sad part, like all other "tweaks" for high-end audio, there does seem to be something "there" relating to improving your system's sound by finding and implementing ($$) a better way to ground your system.
http://nordost.com/blog/the-well-gr...arned-to-improve-my-sound-and-love-the-earth/
Nordost makes a QBase and QCore product that might address some of this; but right now I'm too depressed to look to see what they might cost. I'm saying closer to the $10K I predict than the $0.10K I estimate my isolated ground solution would have cost.