ARC Fault Breakers

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Creon

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I've been told since the 08 code came out that you can't use ARC Fault breakers on lights because when they burn out they create an arc that will trip them. Is that true? I've also been told ARC faults can't share a neutral (example using 14-3 to feed two circuits). Is that true?
 
Creon said:
I've been told since the 08 code came out that you can't use ARC Fault breakers on lights because when they burn out they create an arc that will trip them. Is that true?
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No, it could not be further from the truth.

If you are under the 2008 NEC you are required to AFCI protect almost all 'outlets' in a dwelling. Outlets are lighting outlets, receptacle outlets etc.

You should grab a 2008 NEC and take a look at the definition of 'outlet' in Article 100 and take a look at 210.12 for AFCI requirements.


I've also been told ARC faults can't share a neutral (example using 14-3 to feed two circuits). Is that true?
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That is true, at least if your using single pole AFCI breakers.
 
Thank you iwire. I've read the afci requirements but didn't think of lights being outlets. I'll look it up.
 
No Arc fault on 12-3 or 14-3

No Arc fault on 12-3 or 14-3

Yes, I've had to re-run 12-3's and change to 12-2's because there aren't 2-pole arc fault breakers and it was tripping the single pole arc fault one. (unless they just came out with 2-pole ones, that is, but they didn't have them last year)
 
wyreman said:
they sell a 12/4 w grnd now too i think
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Yes it is called 12-2-2 or 14-2-2. It comes in handy sometimes. I usually use it for condensing and fan unit runs . One set for condenser and one set for service receptacle all in one cable. Fan unit one set for fan unit one set for service receptacle and light . I saw a new coil hiding in my shed last week. It was a nice surprise.
 
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