Grounding the system

Hello,
We have 2 different grounding systems we are talking about. One is the power (AC) ground and then the chassis ground. Your AC grounds should go back to your AC panel or approved equal. Most AC grounds come from the transformer to your service panel and then maybe tied to your cold water pipe, depends on the codes in your area. My house is on a well system with the pipe casing going down over 200ft. A great grounding system.Your chassis ground or bonding can go to a properly installed ground rod (earthing rod) or water pipe.
Ground rods need to have the soil tested and be in the ground X amount of feet to be effective.
A good book to get on the subject is " the art of grounding and shielding". Grounding can be accomplished in many different ways.
Hope this helps.
Joe Nies

I have grounded all 7 of my components' chassis together. This has been sufficient to reduce the differential chassis voltages from a maximum of 35mV to about 2mV. Both of my preamps have a particularly low resistance between their chassis and AC ground so an additional external ground to the outlet is not necessary. I also have dedicated wiring back to my breaker box which eliminates the temptation of running a risky separate ground, as Gs5556 points out above.

Joe - keep in mind that for many components, AC ground and chassis ground are tied together. Floating components have become rather rare these days.

As far as sound quality resulting from the grounding, it clearly improved, pun intended. I was very impressed with the improvement I got from grounding my Koras in particular and it virtually eliminated the tiny amount of ground hum I had in my MC240. I highly recommend doing this in any system so long as it doesn't create a hum problem of its own.

Arthur

Thanks for your attention and response.

Gs5556 - I will keep your warning in mind, but can't stop tweaking. I won't be in the middle, will i, between the radiator and my independent chassis and elements grounding - so the chance of hazard is not big, is it? Copper bar - I already have audiograde fuses, but will consider it.

I had an electrician install a dedicated thick copper cable to my amp and other equipment. The circuit breaker sits on the wall next to my amp (not in the main breaker box). It is split into two 230 volts / 16 ampere lines and one 10A, and one of the 16A lines is direct-coupled to the amp. This is probably good for any amp and system, and with my big s-state amp, you really notice the difference - more authority, bigger and deeper musical picture. The installation was costly (ca 4k usd), but well worth it - i have never looked back.

Joenies - i have never had a hum problem. The idea with the independent grounding is simply to improve the sound. A "little bit" of independent grounding, from record player to phono amp, is just what i have been using for years, also - now i wanted to experiment some more. I will try to get the book - thanks for advice.

Underdog - yes, i am going in the same direction. Sonics improve don't they.

Aball - agree, we seem to have the same experience about this subject . If you can make the system "feel" like a system electrically, the sound improves. I have a Caltek Cm2701 multimeter, and will try to check out the chassis and element voltages, like you suggest. I am an amateur (social researcher) and no expert in this area, using my ears only, but i've found good advice on the web.

Oystein