Dedicated Circuits/Isolated Grounds


I’m getting ready to run dedicated lines for a combination Home Theater/2channel setup. The question is how many. I know to run at least two, one for analog equipment and one for digital equipment. However some additional advice for my particular set-up would be greatly appreciated. My equipment presently consists of:

1. Samsumg DLP TV
2. Yamaha RXV1 Receiver for HT processing and rear channel amplification (I may get a processor and a separate amp for the rears in the future)
3. Plinius 9100 Integrated amp for 2 channel and HT fronts
4. Direct TV receiver
5. Sony 9000DVP for DVD and CD (I will be adding a dedicated CDP down the road)
6. Bel Canto DAC 2
7. Velodyne DD12 sub
8. Totem Model Ones (front) and Mites (rear). I probably will not run a center channel.

My current plan is to run three 20 amp 120 volt circuits with 12 guage wire and one 15 amp 220 volt circuit (for the Plinius) with 10 gauge wire. Each amp/sub on a dedicated line, all digital on a dedicated line, the receiver on a dedicated line, and the TV on a dedicated line. What do you think? Over kill, not enough?

Also I’ve heard talk about isolated grounds. Can someone clarify this? Does this mean burying a rod somewhere in your yard separate from the electrical box? Or is it sufficient to ground each circuit back to the box?
jaffeassc

Showing 2 responses by jadem6

Jaffeassc,
That was a great question. First off, any good electrician will laugh you off the face of the earth if you suggest using anything greater than 12ga. The use of such heavy gauge wire for audio goes against everything they have learned. Hell, it goes against everything I have learned.

Having said that, the heavier the wire, the better the sonics, at least from my experience. I just Google hospital grade electrical outlets and found a number of manufacturers home pages. I found two of two manufacturers who accept 10 ga. I only looked at a couple sites. I use the Wattgate (stupid expensive)after trying most of the high quality outlets. It was a clear improvement, but not until everything else in your system is addressed. This outlet does accept 8 ga. I have tried my Wattgate on a couple other systems and heard very little improvement, so I think your on the right track so fat.

I suggest you research the outlet you want and order it on line. You might talk to Albert Porter, an Audiogon friend who has cryo-treated a number of Hubble outlets and he sells them at cost to us A'gon members. He could tell you the maximum gauge wire they will accept.

jd
Jaffeassc, your description of what you intend to do is the correct "common" grounding process. What others are talking about here is a totally separate grounding system separate of the main panel. If this is done incorrectly you can end up creating additional noise if the entire house finds the new "separate" grounding the shorter route to earth.

What you had intended will work great, just wire your runs as they would be described in any self wiring book or publication you might be using as your guide.

I would avoid attempting the other "isolated grounding" being discussed, for it could cause problems, it might be illegal and it might void you home owners insurance if you had a fire.

So proceed with your Romex wiring as proposed. Ground the grounding wire to the outlet and back at the main panel as you intended. I would however strongly advise you use 8 ga. wire on all circuits. The cost is marginal, and despite this sounding like overkill, my experience has shown a subtle but noticeable improvement.

jd