AFCI required uses
AFCIs are required in most rooms of residential units--bedrooms, kitchens etc, but not in bathrooms unless I ammissing something. Why not?
I read it is required in barhrooms.
Where do you read it is not ??
NEC. NFPA 30. And what year edition
I am not an electrician
see post in forum,. current 2017 NEC p63, sec.210.12 (A)
OHHH I am not an engineer, so you can discount my reply if you want
careful reading will show that I raised the bathroom issue in that thread
to no useful response. What I will say is that I have always accepted
continuing efforts at tightening the code in order to enhance safety. I
have long advocated GFI usage in more than the minimally required circuits,
and hoped AFCIs would be a similar improvement. Sadly, as the history
shows, when first required the actual products were "not yet ready for
prime time". We are more or less on the third generation of them with at
least one vendor unwilling or unable to engineer their own product simply
repackaging a competitor's breakers. (GE selling relabeled Siemens
products, but without the LED indicator feature)
As to the "push back wire" junk referred to in the thread, I stopped using
that stuff 4 decades ago. In my view they should have been outlawed.
Similarly I believe that aluminum bus bars should be outlawed because I
have over the years had to either completely replace or at a minimum move
breakers to unused spaces because the breaker to busbar connections had
loosened and both the breakers and that busbar "tooth" were no longer
Electrical work is a not a "finished product" but a recurring issue of
maintenance and upgrading. That said, being required to install inherently
failure prone products defeats our efforts.
page 63 NEC 2017 210.12 (A)
Correct, AFCI protection is not required because a bathroom is not considered a habitable room. A bathroom does not meet the "similar rooms or areas" in 210.12(A). However, many electricians will wire the lighting outlets of the bathroom with a circuit that also serves the outlets or receptacles of one of the rooms or areas that require AFCI protection. So the bathroom would be protected too. 210.8(A)(1) and (9) requires the bathroom receptacles to have GFCI protection.
According to NEC 210.12 (C) 3 Bathroom receptacle outlets are supposed to
be on a 20 A circuit not feeding any other room. Given that in small
apartments or SFDs, the vent fan which may well include the general
lighting is likely to be within 3' of the tub/shower, those items must be
GFI protected. Thus, in my view they should be on the required bathroom
circuit as explicitly permitted in the note in that section.
The 20A bathroom receptacle circuit is permitted to serve the lighting outlets in the same bathroom per the exception in 210.11(C)(3). Any 15A branch circuit is permitted to serve the lighting outlets or other equipment other than the receptacles required to be connected to the 20A branch circuit for the bathroom. That 15 A branch circuit will probably be protected with an AFCI circuit breaker.
The GFCI protection requirements for bathroom exhaust fans over the shower/tub space is actually from UL and part of the listing and installation instructions for the exhaust fan. However, UL requires the fan to be on a GFCI protected branch circuit, so the load side terminals of a GFCI receptacle cannot be used for that purpose. A GFCI protected branch circuit has the protection originating in the distribution panelboard.
Your question was why AFCI protection is not required in the 2017 NEC, so I don't understand why bathroom exhaust fans were now added to the discussion?
As to a GFCI protected circuit, if the circuit is home run to the bathroom
directly to the line side of a GFI receptacle how is that not protected?
BTW, the only time I had an inspector fail a bathroom was when I did use a
GFI breaker which confused him until pointed out. as he was looking for a
receptacle type within the bathroom.
Why I raised the exhaust fan/light unit issue, is that whether the GFI is
in the panel or at the first outlet on that circuit, it must be GFI
protected, thus not on some other random circuit which might be AFI
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