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AFCI rules in the 2014 NEC #212390
01/04/14 05:51 AM
01/04/14 05:51 AM
Joe Tedesco  Offline OP
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA

210.12 Arc-Fault Circuit-Interrupter Protection
Arc-fault circuit-interrupter protection shall be provided as required in 210.12(A) (B), and (C). The arc-fault circuit inter- rupter shall be installed in a readily accessible location.
(A) Dwelling Units. All 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlets or devices installed in dwelling unit kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry areas, or similar rooms or areas shall be protected by any of the means described in 210.12(A) (1) through (6):
(1) A listed combination-type arc-fault circuit interrupter, installed to provide protection of the entire branch circuit
(2) A listed branch/feeder-type AFCI installed at the origin of the branch-circuit in combination with a listed outlet branch-circuit type arc-fault circuit interrupter installed at the first outlet box on the branch circuit. The first outlet box in the branch circuit shall be marked to indicate that it is the first outlet of the circuit.
(3) A listed supplemental arc protection circuit breaker installed at the origin of the branch circuit in combination with a listed outlet branch-circuit type arc-fault circuit interrupter installed at the first outlet box on the branch circuit where all of the following conditions are met:
a. The branch-circuit wiring shall be continuous from the branch-circuit overcurrent device to the outlet branch- circuit arc-fault circuit interrupter.
b. The maximum length of the branch-circuit wiring from the branch-circuit overcurrent device to the first outlet shall not exceed 15.2 m (50 ft) for a 14 AWG conductor or 21.3 m (70 ft) for a 12 AWG conductor.
c. The first outlet box in the branch circuit shall be marked to indicate that it is the first outlet of the circuit.


Joe Tedesco, NEC Consultant
2017 / 2014 NEC & Related Books and Study Guides
Re: AFCI rules in the 2014 NEC [Re: Joe Tedesco] #212391
01/04/14 06:04 AM
01/04/14 06:04 AM
Joe Tedesco  Offline OP
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
Video explaining an AFCI

http://youtu.be/OWJQqWjlQyo


Joe Tedesco, NEC Consultant
Re: AFCI rules in the 2014 NEC [Re: Joe Tedesco] #212392
01/04/14 06:40 AM
01/04/14 06:40 AM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,225
Estero,Fl,usa
Siemens has a fairly good overall description of AFCIs

http://w3.usa.siemens.com/us/SiteCo...AFCI-Technical-Overview-Presentation.pdf

I am still not sure I understand all I know about 210.12(A)(3)

Why a arc fault breaker and a device type on the same circuit?
What is a "supplemental arc protection circuit breaker"?
Leviton talks about their device but the breaker is just alluded to.
http://www.bobselectricco.com/bob-s...itarc-faultcircuitinterrupterreceptacle.


Greg Fretwell
Re: AFCI rules in the 2014 NEC [Re: Joe Tedesco] #212395
01/04/14 01:49 PM
01/04/14 01:49 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,967
Brick, NJ USA
A tag line from bobselectricco.com link above, seems like another 'new' item is mandatory with the '14 changes.

"AFCI receptacles must be UL listed for compatibility with specific magnetic circuit breakers that are commonly found on the market today or used downstream from a new type of breaker called an SAP (Supplemental Arc Protection) breaker."

Reading thru the entire text, some text alludes that the AF device works with 'standard mainstream breakers'; yet the above quote is deeper within the text??


John
Re: AFCI rules in the 2014 NEC [Re: Joe Tedesco] #212399
01/04/14 03:06 PM
01/04/14 03:06 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,225
Estero,Fl,usa
I just wonder why you would want the inline device if you are replacing the breaker anyway.
I doubt there is going to be a Zinsco SAP breaker anytime soon.


Greg Fretwell
Re: AFCI rules in the 2014 NEC [Re: Joe Tedesco] #212400
01/04/14 04:42 PM
01/04/14 04:42 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,967
Brick, NJ USA
Greg:
Existing old "FPE" 150 amp panel. EC adding three (3) new 2 wire circuits. He installs a 60 amp, 2 pole FPE CB, 1" EMT raceway (3'6"), 5' +/- conductor length. into a 100 amp MLO new sub panel. Three compliant AFCI CBs in new sub panel. Normal TR devices.

IMHO, that is compliant, and the AFCI receptacles are not required. Agree??


John
Re: AFCI rules in the 2014 NEC [Re: Joe Tedesco] #212401
01/04/14 05:08 PM
01/04/14 05:08 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,225
Estero,Fl,usa
Agree, that is the most elegant solution. Just about any modern panel will work for the sub. They make AFCIs for just about anything still in production.

I am still not sure what a SAP is and why you would use one.


Greg Fretwell
Re: AFCI rules in the 2014 NEC [Re: Joe Tedesco] #212402
01/04/14 09:00 PM
01/04/14 09:00 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,967
Brick, NJ USA
Now, I can think of a few definitions for 'SAP'.

Seriously, I have to find time to read the '14 Changes!


John
Re: AFCI rules in the 2014 NEC [Re: Joe Tedesco] #212409
01/05/14 12:16 AM
01/05/14 12:16 AM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,225
Estero,Fl,usa
From the cite Joe posted
"listed Supplemental Arc Protection circuit breaker"


Greg Fretwell
Re: AFCI rules in the 2014 NEC [Re: Joe Tedesco] #212414
01/05/14 04:56 PM
01/05/14 04:56 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,967
Brick, NJ USA
I believe you and I still do not know what it exactly is??


John
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