Wiring 2 outlets to 2 dedicated 20 amp circuits with a single 10/3 electrical wire.

Most all of us are at the mercy of a 240 V system, that involves step down transformer’s,etc.

We all have a panel in our house with busbars that feed the individual circuits. And there are two legs of 120v power distribution along the bus bars alternating between the circuit breaker’s.

Now is the issue here, jea48, that the Multi branch circuit involves two legs?? Versus the same leg, which isn't allowed with a multi branch circuit.

It seems you’re being more profound by raising issues with the overall power in flow into a house. By design we all live with that.

I am focused on 2 hot wires coming from the panel to support 2 outlets and then the shared returns related to a neutral wire and a ground wire. To this point I haven’t heard any direct problems with this issue. Only in a very broad context dealing with the overall power supply into the house.

So the question becomes, dedicated versus multi branch circuit, is this a problem? To say it’s not isolated is not answering the question as to why it’s a problem. Each of the outlets receives dedicated power off the bus bar. This is a fact.

My question focused on noise which is the issue. And if there’s no noise coming from the neutral, and the ground, assuming these are connected correctly at the panel, and the panel secures the ground via a stake in the dirt, what is the problem??

@emergingsoul , your above question(s) have been answered more than once by @jea48.  Please re-read his posts. 

1. I agree jea48 has gone out his way. Since you don’t see a problem with a multi branch circuit go ahead and install it then.Problem solved. Or you could use some noise filters. http://v2.stereotimes.com/post/puron-ac-power-conditioner-by-greg-voth/

@emergingsoul said:

My question focused on noise which is the issue. And if there’s no noise coming from the neutral, and the ground, assuming these are connected correctly at the panel, and the panel secures the ground via a stake in the dirt, what is the problem??

I have answered your question(s) several times throughout this thread. In about every variation I can think of that gives the same answer to your question(s).

You keep talking about noise on the neutral and the ground conductor. I don’t know where you are getting that from... The problem with audio equipment fed from a MWBC, (Multi Wire Branch Circuit), is not caused from the shared neutral or EGC, (Equipment Grounding Conductor). It caused by the Balanced L1 120V loads being connected in series with the L2 120V loads. You couldn’t find a better way to couple the 120V power supplies of your audio equipment together than using a MWBC to feed them.

JMHO, you would probably be better off just using one of the circuits, (turn the other one off at the panel), and power all your audio equipment just off the one. Pick up a good quality power strip for more outlets if needed.

As I have said several times in this thread the 120V L1 and 120V L2 Balanced loads (current) are in series with one another. The Noise you speak of comes from the power supplies of digital equipment, as well as any cheap made SMPS. There is your noise... The use of a MWBC dumps it right onto the primary winding(s) of the power supplies of the analog equipment. (Preamp, Power Amp, ect)

Maybe you don’t have any digital equipment or equipment with SMPS. Then there is a good chance a MWBC works fine for you. Or if you do have digital front equipment and SMPS maybe the designers/manufacturer spent the extra money to add filtering to prevent digital hash from going back out onto the mains. And maybe the designer/manufacturer of SMPS(s) spent the extra money on the build quality of the SMPS(s) and filtering to prevent bad harmonics from going back out on the mains.

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FWIW, If your audio system sounds good to you that’s all that maters.

FWIW, you could have a new dedicated circuit installed, (10/2 Romex), and then have the electrician change the MWBC to just a two wire Hot & neurtral + grd dedicated branch circuit. Make sure the electrician feeds the two dedicated branch circuits from the same Line, Leg. Both from L1 or both from L2...

Any Electrician worth his salt can rework the panel circuits to free up two breakers that are both on the same Line, Leg.

I strongly suggest you don’t use the last electrician the installed the MWBC...

I get the conversation for intellectual reasons, just not practical ones.....but thank you for the education!

My electrician does work for two audio installers, and has plenty of experience with 2 channel and home theater wiring. He charged me $300 plus parts to install 1 dedicated circuit, and $100 plus parts for the second dedicated line.....and highly recommended pulling 2 completely separate lines. The extra $150 made it a simple decision.