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

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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@bikeboy52 

Bad Idea...

A true dedicated branch circuit has a dedicated, Hot conductor, neutral conductor, and equipment grounding conductor. A true dedicated branch circuit does not share a raceway, (conduit), or cable with other branch circuits.

An Overview of Audio System Grounding and Interfacing

Se page 16. Read pages 31 thru 37.

/   /   /   /

A true dedicated branch circuit does not share a raceway, (conduit), or cable with other branch circuits.

Current carrying conductors from one branch circuit can induce a voltage on the conductors of the other circuit.  Therein if there is noise on one circuit it could be induced onto the other circuit.

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@jea48 

So the bottom line is each circuit should have its own breaker in the panel right? 

EDIT:

  (12-20-2022 at 10:08pm post)   jea48 said:     

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

Replace the word merely  with the word basically.

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

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