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

@jea48Wrote:

Probably the biggest reason for installing more than one Dedicated Branch Circuit is to decouple the power supplies of audio equipment from one another. Example digital source(s) equipment from analog equipment.

I agree!

That was one of the reasons I ran four 60’ runs of galvanized steel armored MC cable 10AWG. That’s four true dedicated branch circuits, one for each mono block amp, one for analog and one for digital. It helps to reduce noise on the AC lines, by reducing the amount of transformers and power supplies on each circuit. Also, the MC helps to reduce hashing noise EMI, and electric fields, on the dedicated branch circuits feeding your audio equipment. You don’t realize how much hashing noise is on the AC lines, until it’s gone. No ground loop hum. No noise. System is dead quiet with ear against speaker horn, I have tube and SS amps. (speaker efficiency is 2.7%). 😎

@emergingsoul Wrote:

Keep in mind this is a 70 foot run for a romex wire.

Will two 70’ runs of 10AWG NM cable aka Romex break the bank?

See below:

Mike

You can get 10-4 romex now if you only want to pull one wire or for whatever reason you want to do that , gives you four conductors and a neutral. Still have to share the ground.

Oops , correction 4 conductors total giving you you second neutral.

Jea48

The comments you make are probably clear to some but not me.

Are you saying that the neutral sharing back to the panel is a problem? And if so maybe it's unclear to me why this is.  Not sure I follow the rationale about Power supplies of components sharing in this situation.  Where is the Sharing coming from?

Truth be known, I specifically directed the electrician to create two dedicated lines on the same leg, and then he pulled this crap and I had to live with it.  And having considered what he did, I'm trying to understand whether I should rip it all out and have it redone by someone else. His proposal was unclear but we discussed it and then he comes and starts doing the work and I see one wire coming out of the wall and I ask what the heck is going on. The project didn't go very well. They did manage to install one dedicated circuit elsewhere.  I couldn't get a second dedicated in the elsewhere room because I ran out of room on the panel.  

@emergingsoul said:

Are you saying that the neutral sharing back to the panel is a problem?

It’s more than that. It’s the way a multiwire branch circuit works.

I have been trying to find this Web Link for the last couple of days. It was in my Bookmarks but I must of accidentally deleted over the years. Anyway try to follow what is said. Stop when you reach "Three Phase Power Systems" ...

A multiwire branch circuit is merely an extension of the split phase winding of the utility power transformer.

https://www.ibiblio.org/kuphaldt/electricCircuits/AC/AC_10.html

Truth be known, I specifically directed the electrician to create two dedicated lines on the same leg, and then he pulled this crap and I had to live with it.

I believe it... Some electricians just don’t listen.

I couldn’t get a second dedicated in the elsewhere room because I ran out of room on the panel.

You could install a Tandem breaker.

Tandem Breakers - Circuit Breakers - The Home Depot

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