Grouding for dedicatied lines?

I don't really think that BX, AC, MC cables, or conduit are probably any better than romex of reasonable gauge wire. #12 or #10 should be sufficient for most applications. Especially since the terminals for a 20 amp duplex receptacle are not designed to accept a conductor larger than #10. However, when entering the galaxy of the audiophile, anything is possible--as long as it is safe.

I don't really understand your comments about circuits being placed ahead of the "main". It must be a different definition of the word than what is common in the electrical industry. Nothing should be tapped ahead of the main circuit breaker (or fuse), unless it has its own main circ. breaker (or fuse) within the code approved distance per the tap rule. I am sure I am not discussing the same situation you are refering to.

I am not an expert on star grounding, but I believe it is a method of grounding electronic systems--audio, video, computers, etc.--that begins at one point in the system, and branches out to each piece of equipment in a star configuration. It can be very technical, and I am not well versed in its design criteria. However, I do know that the grounding point at where the "star" begins is itself grounded to the main grounding electrode (or mat in larger systems).

I hope this helps.

Alexander,
After re-reading your post, I think I totally misunderstood.

You must be refering to balancing the load by placing mono-blocks on opposite phases (A or B) of a 120/240volt system.

I don't really know about an improvement in sound--I've never owned mono-blocks! ;?)

The ground point for my house is a clamp around the copper water pipe that enters the house. I found that paint had covered the pipe. I removed the clamp and sanded the pipe down to the copper and sanded the paint off the ground cable. With regard to separate lines, I have two lines that share the same ground but if I use both outlets there still seems to exist a difference in ground potential. Hum is least when everything is connected to only one circuit.

I would recommend hiring an electrician to handle this type of work, lest you become a famous conducter.

Hi,
Thanks for all your helps. I'll call an electrician next week and print all the posts to him to see what he suggets.
Thanks again
DT