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AC Dedicated Line

Hello guys
I will run three (3) dedicated AC power lines: one for my stereo system (power amp, preamp, DAC, etc) and two for my stereo subwoofers (one line for each one).

These three circuits will be connected directly to the main AC board of the Electrical Comany wich provides me the service right at my door.

They will all share the same ground cable, wich I will connect to a dedicated ground bar, but I would like your opinion about sharing the "same neutral line" on these circuits. Could it affect the sound quality? 

If I have to send three different neutral cables, one for each circuit, I will need more cable to run through the house and it will be more expensive and complicated.

Please I would appreciate responses with real experiences. I don't want to start a technical discussion. I know at the end, in the main board, they all will share the same neutral line, so electrically it should be the same, but in this crazy audio world who knows for sure if soundwise it will be the same....

PS: by the way, I will run 4 or 6 mm2 cables (I guess about 11 to 9 AWG on the US scale). Here in Argentina we measure cables by square millimitres.
plga
plga OP
184 posts
 
Hi guys
Finally I will install tomorrow a 8/10 AWG (6 mm2) dedicated line for my system, using a 20 Amp breaker and plugging the line directly to the main breaker on the street. 

I will only connect my system to the line, not the subwoofers.

I will let you know the results ASAP.

PS: the system wich will be connnected to the line:

Holton DC Blocker
Bada LB-5600 Power Filter
Wyred4sound USB Reclocker
Gustard U16 USB converter to I2S
Audio-GD R8 DAC
Audio-GD Master 1 preamp
Nord Acoustics NC500 stereo power amp (class D)
Q Acoustics Concept 500 floorstanders
lowrider57's avatar
lowrider57
5,418 posts
 
I don't understand how you can connect to the AC line on the street. Is that how a residence receives power in your country?

plga OP
184 posts
 
I'm sorry, may be I expressed it in a wrong way.

I will connect the line to the main breaker of the Electrical Company who supplies me the service. Not the street!!!   I meant I will by pass my house's main breaker. 

I will connect a dedicated positive, a neutral and ground. The latest will be connected to a new copper bar, wich I will bury on the ground.
jea48
4,871 posts
 
plga said:
I will connect the line to the main breaker of the Electrical Company who supplies me the service. Not the street!!!  I meant I will by pass my house's main breaker.

I will connect a dedicated positive, a neutral and ground. The latest will be connected to a new copper bar, wich I will bury on the ground.
Total length, distance, of the new dedicated branch circuit wiring?

plga said:
I will only connect my system to the line, not the subwoofers.
Where will you feed the subs from?
How are the subs connected to the system?
From what you have described you are doing, (if I understand you correctly), you will more than likely end up with a ground loop, and subsequently a ground loop hum.

.

cleeds
6,596 posts
 
plga
I will connect the line to the main breaker of the Electrical Company who supplies me the service. Not the street!!!  I meant I will by pass my house's main breaker.
I do not think that complies with NEC - you'll also have to check your local code. That is definitely not allowed where I live.

I will connect a dedicated positive, a neutral and ground. The latest will be connected to a new copper bar, wich I will bury on the ground.
I'm not sure what you mean by "dedicated ground." All grounds and neutrals must be connected together inside the service panel. No exception - that's NEC. Also, some local codes require more than a single ground rod so again, so check local code.
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