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#99579 - 08/17/06 10:01 PM multiwire circuits and tied breakers  
Niko  Offline
Member
Joined: Aug 2006
Posts: 356
Campbell, CA
My registeration expired or i could not use my existing ID and/or password so i had to register again.

My ispection was failed because the inspector said all multiwire branch circuit that share a neutral must be on a tied breaker.

In my situation i had two single breakers on two different busbars feeding two receptacles for garebage disposer and the washing machine.

My understanding is whenever there is a peotential difference between the ungrounded conductors on one device then the breaker has to be tied.

Is he correct in his statement?

Thanks
Edward


Be kind to your neighbor, he knows where you live


2017 / 2014 NEC & Related Books and Study Guides

#99580 - 08/17/06 10:11 PM Re: multiwire circuits and tied breakers  
macmikeman  Offline
Member
Joined: Jul 2002
Posts: 717
Honolulu, Hawaii
In my opinion he is incorrect. As long as the two breakers are on opposing poles of the panel buss there is no code violation until they are feeding a single yolk. If they are not feeding a single yolk device than they can be 1,3,5,7,9, etc spaces apart, but I would have them right next to each other.


#99581 - 08/17/06 11:19 PM Re: multiwire circuits and tied breakers  
Larry Fine  Offline
Member
Joined: Feb 2005
Posts: 693
Richmond, VA
Remember also that, when NOT using handle-tied breakers, that every neutral connection cannot depend on the receptacle screws, but must be joined, and terminals pigtailed.


Larry Fine
Fine Electric Co.
fineelectricco.com

#99582 - 08/18/06 12:22 AM Re: multiwire circuits and tied breakers  
Niko  Offline
Member
Joined: Aug 2006
Posts: 356
Campbell, CA
Larry, I ALWAYS- ALWAYS make pigtails.

If you think the inspector is right or has an argument please give me a code reference i can not find any NEC reference that supports his statement.

Thanks
Edward


Be kind to your neighbor, he knows where you live


#99583 - 08/18/06 12:42 AM Re: multiwire circuits and tied breakers  
caselec  Offline
Member
Joined: Apr 2002
Posts: 558
San Jose, CA
Edward

Did you mean disposal and dishwasher ? Are you feeding a single split wired duplex receptacle with this circuit? If you are feeding a split wired duplex with this circuit you need a handle tie or a 2 pole breaker. As long as both of these circuits do not connect to a single device (yoke) you don’t need a handle tie or 2 pole breaker.

What city is this in?

Curt


Curt Swartz

#99584 - 08/18/06 01:53 AM Re: multiwire circuits and tied breakers  
Niko  Offline
Member
Joined: Aug 2006
Posts: 356
Campbell, CA
Curt,

It is San Jose.

I always use two separate receptacles.
The inspector said everytime you have multiwire branch circuits and share a neutral, you must use tied breakers.

???????

Thankx
edward


Be kind to your neighbor, he knows where you live


#99585 - 08/18/06 02:01 AM Re: multiwire circuits and tied breakers  
caselec  Offline
Member
Joined: Apr 2002
Posts: 558
San Jose, CA
I'm sure this was a combo inspector. Call the city and ask to speak with the electrical supevisor for the area your project is in. Don't change the breaker just to make him happy.

Curt


Curt Swartz

#99586 - 08/18/06 01:36 PM Re: multiwire circuits and tied breakers  
trobb  Offline
Member
Joined: Jun 2006
Posts: 110
Iowa City, IA
The flat I just moved out of had this configuration- common duplex receptacle feeding a dishwasher and a disposal, two circuits, handle tied. For me, it makes sense because this way you won't run into a half-dead box assuming it's fully dead.


#99587 - 08/18/06 05:38 PM Re: multiwire circuits and tied breakers  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Quote
Remember also that, when NOT using handle-tied breakers, that every neutral connection cannot depend on the receptacle screws, but must be joined, and terminals pigtailed.


This applies handle ties or not.


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#99588 - 08/18/06 06:23 PM Re: multiwire circuits and tied breakers  
Larry Fine  Offline
Member
Joined: Feb 2005
Posts: 693
Richmond, VA
Right you are!

300.13 Mechanical and Electrical Continuity — Conductors.

(B) Device Removal. In multiwire branch circuits, the continuity of a grounded conductor shall not depend on device connections such as lampholders, receptacles, and so forth, where the removal of such devices would interrupt the continuity.

[This message has been edited by Larry Fine (edited 08-18-2006).]


Larry Fine
Fine Electric Co.
fineelectricco.com

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