ECN Forum Forums Code Related Discussion NEC & other Code issues 2012 NEC 2012(A)

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If that is a dedicated circuit or a circuit that also only serves one of the exempt rooms, it will not need an AFCI

That air handler with a cord/plug seems to be getting more popular; I thought it was just a Florida thing?

Hard wired (our way) it would not even be a thought.

Pardon me, but I thougt that the true purpose of the AFCI was to protect sleepers from the consequence of plug connected appliances.

There are a lot of embedded assumptions:

Bedroom appliances get physically abused -- as in stepped on or otherwise crunched...

They are very, very, reluctantly retired by the owners -- because the worst offenders are those that provide auxiliary space heating. AFCIs don't provide meaningful protection for corded vacuum cleaners and such.

In which case, the AFCI circuit should've been a NEMA mandate for space heaters. Yes, it'd double their cost, but they're the devices that are implicated in bedroom fires.

The notion that an AFCI circuit will actually protect against a field wiring fault -- an extremely rare mechanism for a bedroom associated fatality -- seems a reach, for me.

Anything that sensitive is going to trip out over an endless number of universal-motor circuit issues. And, universal-motors are everywhere in home appliances.

Just the arcing at a worn commutator would h a v e to stimulate any trip circuit. Arcs are arcs.

This kind of false positive is going to have users all over the nation bypassing the AFCI breakers -- probably by pulling them off the bus and installing a conventional breaker.

Tesla:
I agree on some of your points. The mfg literature, available video clips, and other forms of advertising that I have seen, and have leaned toward the nail in the NM arc.

Back in first look at AFCI, I questioned the issues of abused 'cords' on appliances, extension cords, lamps, etc. The AFCI evolved into the 'combo' for series & parallel arcs, and supposedly protected the utilization equipment & branch circuit.

Be all that as it may, the states that adopted the various editions of the NEC, have to live with the code, unless there are local or stste amendments. Here in NJ, AFCI was mandated with the 2008 NEC (in mid 2009). We all learned to 'live with it'. ECs complained, Inspectors complained, homeowners complained, builders complained....and in the end, we all live with it.

I have not heard of anyone removing, or bypassing an AFCI.

Now, I'm looking forward to the still elusive AFCI device. It's here, somewhere & I requested a 'sample' from a Leviton Rep, & haven't heard a word back.

BTW, In my EC days, I stayed as far from resi as I could!

Tesla, it was the sleeping babies that got the camel's nose under the tent. Now the usage has expanded to virtually every circuit in the house for some ambiguous problem they have not really spelled out ... other than they were not making enough money on a $5 breaker so they found a way to sell $50 breakers.