Arc-fault recepptacles will not satisfy the requirement of 210.12 to protect the entire branch circuit. If you are refering to breakers, I believe that no one makes a breaker for this. Some NM cable manufacturers have began making a cable with two grounded conductors and two ungrounded conductors for this purpose.
Ryan Jackson, Salt Lake City
Re: Arc Faults for two wire?#29713 09/23/0302:48 PM09/23/0302:48 PM
I'm under the impression that the question pertains to 2-wire, ungrounded circuits, in which the GFCI component of the AFCI will not function. Which brings up the whole issue of how AFCI protection is actually acheived at lower levels of current. Is that it, watthead?
Re: Arc Faults for two wire?#29717 09/24/0310:27 AM09/24/0310:27 AM
Yes this is a retrofit of an old two wire, no ground installation. I had not read the entire branch circuit requirement in the code. I guess that eliminates the possibility of receptacles. The entire branch circuit may be an excellent idea in this instance because the panel is in the clothes closet. New question- " are arc fault breakers listed for use on two wire circuits? " Redsey I thought that GFCI's worked when installed on this type of two wire system, but then again I thought an arc fault receptacle might exist, and I have never been on TV explaining what the UFO looked and sounded like, believe it or not.
Re: Arc Faults for two wire?#29718 09/24/0303:09 PM09/24/0303:09 PM
The [b][i]UL AFCI Test Scenarios[/i][/b] document gives a mixed answer. Parallel arcing, UL says YES. Series arcing, however, in ungrounded NonMetallic is a NO. Look at the table on page five on the linked document.
Re: Arc Faults for two wire?#29719 09/24/0304:04 PM09/24/0304:04 PM
I'm under the impression that the question pertains to 2-wire, ungrounded circuits, in which the GFCI component of the AFCI will not function
A GFCI will work fine on a two wire circuit, a GFCI outlet or breaker does not need a ground to operate.
The original question had to do with the availability of AFCI outlets, I do not know if there are available.
I do know that the use of a AFCI outlet would be fairly limited as the AFCI code requirement requires the entire branch circuit in the bedroom to be protected not just the load plugged into an outlet.
210.12(B) Dwelling Unit Bedrooms. All branch circuits that supply 125-volt, single-phase, 15- and 20-ampere outlets installed in dwelling unit bedrooms shall be protected by an arc-fault circuit interrupter listed to provide protection of the entire branch circuit.
Bob Badger Construction & Maintenance Electrician Massachusetts
Re: Arc Faults for two wire?#29720 09/24/0305:55 PM09/24/0305:55 PM
One of the ways work on old houses has progressed here in Minnesota, when adding new wiring in bedrooms, is to keep the old and the new seperate. Any new work in a bed must have AFCI from the breaker. . .we do that with new wiring including a new branch circuit. The old wiring that is still in the bedroom that is undisturbed by the construction is grandfathered in and left alone on its original overcurrent protection.
On service upgrades, only new wiring added in a bed is required to be AFCI protected.
It's a hassle to run the circuit all the way back to the panel, but it side steps this very problem that you are struggling with.