2. amps-preamps
  3. 181519-150037

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

Here's an idea (and it is code compliant), using one 10/3 romex electrical wire (three insulated conductors, and a bare ground wire - 10 gauge), you can wire two outlets to a double pole breaker (and yes the legs would not be the same, which on a quiet electrical system is not a big deal).
 

In this situation, 2 hot wires from the outlets would be wired directly to each of the circuit breakers, the neutral would be bridged between the two outlets and then connected to the appropriate spot on the panel, and the grounds for each outlet would be attached to the single ground wire that goes back to the panel.  This would all appear within a quad outlet wall panel (ie. Two 20 amp outlets side-by-side)

For a long 70 foot run this seems prudent thing to do, less costly and kosher.

emergingsoul
jea48
4,453 posts
 

@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

.

 

jea48
4,453 posts
 

@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.

.

ronboco
847 posts
 

@jea48 

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

 

jea48
4,453 posts
 

EDIT:

  ()   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.

.

emergingsoul OP
1,171 posts
 

In this case each circuit does have a separate breaker. The voltage is being sent to the outlet from separate starting points on the panel.

The issue i see is the neutral going back to the panel. And here the neutral wires are joined between the outlets and then directly wired back to the appropriate spot on the panel. Further, the ground similarly is being handled the same way and routed back to the panel. The two hot conductors are separate, from their own breaker, in support of the outlets.

It's crystal clear this is not a true dedicated circuit.  But that's not the issue. The issue is trying to clarify why noise somehow is affecting the outlet in a manner that impacts performance of a system.

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