# Odd Multiwire Circuit

#### George Stolz

##### Moderator
Staff member
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?

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#### Dennis Alwon

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

#### iwire

##### Moderator
Staff member
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

##### Moderator
Staff member
But now we get into the ring circuit debate.
Oh Boy, this will be fun.

Roger

#### al hildenbrand

##### Senior Member
But now we get into the ring circuit debate.
:?

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

#### Little Bill

##### Moderator
Staff member
:?

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

##### Senior Member
Have you got a couple of days to read it?:roll:
Have you got the link?

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:thumbsup:

#### iwire

##### Moderator
Staff member
Oh Boy, this will be fun.
I am running away from this like a little girl.

#### roger

##### Moderator
Staff member
I am running away from this like a little girl.
Truth be known, so am I. :bye:

Roger

#### Little Bill

##### Moderator
Staff member
Truth be known, so am I. :bye:

Roger
Need any help mowing your fields?:lol:

#### ActionDave

##### Moderator
Staff member
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?

Staff member

#### jeremysterling

##### Senior Member
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

##### Senior Member
Right on! Can we put a GFCI in there, too!:happyno:
A GFCI receptacle will work just fine.

#### John120/240

##### Senior Member
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

##### Senior Member
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.

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#### al hildenbrand

##### Senior Member
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

##### Senior Member
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.