Odd Multiwire Circuit

[George Stolz]

Consider the attached picture.

Assuming the circuit breaker handles are tied together, could you legally use a pair of 12-2 NM cables to go to different points in a kitchen, and then combine them back together to come into, say, an island with a single 12-3 NM cable?

 

[Dennis Alwon]

No-- you created parallel neutrals and that is not allow for #12 in that condition.

 

[iwire]

No-- you created parallel neutrals and that is not allow for #12 in that condition.

I agree with Dennis.


But now we get into the ring circuit debate.

 

[roger]

But now we get into the ring circuit debate.

Oh Boy, this will be fun.


Roger

 

[al hildenbrand]

But now we get into the ring circuit debate.

:?

I missed that one (or those). Does any one have a handy link to one?

 

[chris kennedy]

:?

I missed that one (or those). Does any one have a handy link to one?

Here you go.

 

[Little Bill]

:?

I missed that one (or those). Does any one have a handy link to one?

Have you got a couple of days to read it?:roll:

 

[al hildenbrand]

Have you got a couple of days to read it?:roll:

Have you got the link?

 

[al hildenbrand]

Here you go.

:thumbsup:

 

[iwire]

Oh Boy, this will be fun.

I am running away from this like a little girl.

 

[roger]

I am running away from this like a little girl.

Truth be known, so am I. :bye:

Roger

 

[Little Bill]

Truth be known, so am I. :bye:

Roger

Need any help mowing your fields?:lol:

 

[ActionDave]

So you want to combine a MWBC with a ring circuit. Cool.
I wonder what happens to the neutral current divided up portion of the circuit? Do you get some of that EMF that is being discussed in the 12-2 Travelers thread?

 

[roger]

Need any help mowing your fields?:lol:

Sure, come on.

Roger

 

[jeremysterling]

So you want to combine a MWBC with a ring circuit. Cool.
I wonder what happens to the neutral current divided up portion of the circuit? Do you get some of that EMF that is being discussed in the 12-2 Travelers thread?

Right on! Can we put a GFCI in there, too!:happyno:

 

[al hildenbrand]

Right on! Can we put a GFCI in there, too!:happyno:

A GFCI receptacle will work just fine.

 

[John120/240]

George, what is the intended application or is this just theoritcal ? At # 4 you would have

240V. Handles are tied together so thats kosher. So as to the ring circuit issues..........IDK

 

[jeremysterling]

A GFCI receptacle will work just fine.

By that, I hope you mean the recept will trip and not provide any power.

If you have a GFCI wired line/load at outlet "1" and a load on circuit "A" at outlet "4", a portion of the neutral current will run on the circuit "B" neutral homerun. That portion should be enough to trip the GFCI.

 

[al hildenbrand]

By that, I hope you mean the recept will trip and not provide any power.

If you have a GFCI wired line/load at outlet "1" and a load on circuit "A" at outlet "4", a portion of the neutral current will run on the circuit "B" neutral homerun. That portion should be enough to trip the GFCI.

Its much simpler than that. Just don't try to use the load side terminals of any GFCI receptacle that has line connections at #1, #2, #3, or #4.

 

[jeremysterling]

Its much simpler than that. Just don't try to use the load side terminals of any GFCI receptacle that has line connections at #1, #2, #3, or #4.

Agreed.

However, I was contributing to the line of furthering the complicated nature of the OP circuit. What could be simpler than a SABC? Finding a circuit with parallel #12 neutrals, non-grouped MWBC, ActionDave's problematic EMF(!), and GFCI's crammed into every outlet.

Of course, we could plan ahead and put a 1900 box at outlet #3 to make room for your joints.