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Acceptable Level Ground/Earth Noise

Hi Everyone
I have a dedicated earth for my audio system.  I was digging a bore for water and lost the rod so decided to dedicate that bore for Earth.  It is about 100 feet deep an is in water.  The line runs straight to my dedicated audio room and is shared among the various audio components.  
I am running a Clearaudio DC preformence through an Avid Phallus phone stage hooked up to a ML No.  38s pre.  The cartridge is a clear audio virtuoso MM.  The ML volume level goes to 92 and the hum appears at 60. Previously when the earth was shared the hum was almost unbearable at 60 but now is significantly reduced. 
My question is that is the hum just part of the analogue experience or should it be absolutely quite? 
srafi

Showing 3 responses by srafi

srafi OP
17 posts
 
Guys sorry did not mention I am not based in USA and laws are not the same and not as well enforced. How ever if this is a safety issue I could easily connect the new earth to the existing setup. 
My question remains. Is some level of hum part of an analogue setup or should it be absolutely quite?
Thanks for all the advice so far. 
srafi OP
17 posts
 
Here goes. I live in Pakistan and the earth supplied by our utility is useless. All houses have there own grounding sunk about 12-18 feet into the earth into a copper plate with bare copper wire coming out of the ground and providing earthing to the main distribution of the house from where this is run throughout the house. I have simply taken another connection point that is sunk further into the ground and which is not shared by the rest of the house. I do have a lightning rod connected to the main earthing system. What I have done may be harmful in some way that I am not aware of and would connect to the existing one.  
At the moment what I have done is takes the separate earth and connected it to the earth wire that is supplying the various resecptales that are being used in my set up. I have also taken another wire and connected it to a copper bus bar to which the analogue equipment is grounded through individual wires such as the earth wire attached to the RCA wire plug the earth plug at the bottom of the table as well as the earth on the phono stage. All the 3 pin sockets are also grounded in the sockets as they would be normally. 
This portion of the house is a new addition so it was easy enough to isolate the various wires to do this. 
srafi OP
17 posts
 
I have tried to disconnect the earth to worse results. The reason I have put in this separate earth is so that the audio equipment would be isolated from the rest of the house. It gets pretty hot here so we pretty much use AC year round and the load in the house is pretty high. I did forget to mention it gets louder when I touch the tone arm so could be something else. 
Genuinely looking for help not trying to invent a new system or any thing. I may have done things wrong and any help would be appreciated I wish I could post pics to give a better idea. 
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