dana1028
Senior Member
- Location
- San Francisco Bay area
Are there any AFCI breakers [2-pole] yet available for multiwire branch circuits?
Thank you,
Thank you,
AFCI - Multiwire branch circuits
- Thread starter dana1028
- Start date
- Status
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Rumor has it that GE and Siemens make them.
gotmud
Senior Member
- Location
- some place cold
yup....
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Ge uses 2 single poles with breaker tie. That is exclusive to GE. I don't believe sq. D QO panels make them or so a member has been told.
bobserrano
Member
- Location
- Silicon Valley, California
The info I got from the field is that 2 single pole arc faults with handle ties will not work with shared neutrals. I heard that Square D makes a 2 pole arc fault that is made for shared neutrals.
- Occupation
- Licensed Electrician
That is correct, with this exception.
Nope. But these guys make one, i.e. what Jumper and Dennis said.
al hildenbrand
Senior Member
- Location
- Minnesota
- Occupation
- Electrical Contractor, Electrical Consultant, Electrical Engineer
If GE and its MOD 3 Combination-type single pole AFCI are any indication of what other manufacturer's will copy and make for us to install, then, in the future, providing AFCI protection for part or all of a multiwire branch circuit will be no big deal.
Look carefully at the wiriing diagram in the GE tech article about their handle tied single pole MOD 3 combination AFCI.
Click HERE.
Note that one AFCI has no neutral connected to it! This GE AFCI is a whole new generation of product, in that the ground fault sensitivity has been removed.
These breakers have been sold since the middle of last year. No additional price.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I have not needed this as I never use mwbc in a residence but it is convenient in that you don't need to stock different parts. I posted that exact hookup awhile ago and the product was available then. FWIW, these are not special single pole afci. They are the standard afci put together with ties.
al hildenbrand
Senior Member
- Location
- Minnesota
- Occupation
- Electrical Contractor, Electrical Consultant, Electrical Engineer
As enforcement of the 2011 NEC is phased in, the value of this type of AFCI will increase. Many existing dwellings contain MWBC homeruns to the service, and they may well be serving parts of the dwelling that are included in the list of areas / rooms in 2011 NEC 210.12. Repair, replacement and / or extension of these circuits become somewhat simpler with the capabilities of the GE MOD 3 combination AFCI (as we all wait for the receptacle type AFCI to arrive.)
- Status