On Saturday, March 25, 2017 at 8:55:53 PM UTC-4, wrote:
On Sat, 25 Mar 2017 20:26:29 -0400, wrote:

On Sat, 25 Mar 2017 13:23:20 -0700 (PDT), trader_4
wrote:

On Saturday, March 25, 2017 at 4:04:07 PM UTC-4, wrote:
On Sat, 25 Mar 2017 12:31:33 -0700 (PDT), noname
wrote:

Home built in 2005. These are interconnected Fireex smoke detectors (I believe because they have a yellow wire connected to the red wire). All the breakers are marked, but I don't see one for the smoke alarms.

Now I was away on business and my wife had an alarm chirping and couldn't get it to stop so she literally in wired it while it was hot! Could have killed herself.

Problem is I want to rewire it and I don't know how to cut the power to it since there is no breaker.

Thoughts?
There HAS to be a breaker. It will likely be shared with another
circuit

Agree. And it obviously can't be hard to figure out which breaker
it is.



- in USA the code required the smoke detectors to be on AFCI
breakers,

I don't believe that is correct, either then or now. AFCIs were
required for circuits in bedrooms, what year that went into effect,
IDK. But smoke detectors are not necessarily required to be in the
actual bedroom. Here I believe having them close to the bedroom
is sufficient. If the smoke detector is in a hallway right outside
a bedroom in an area not required to be AFCI protected, then I don't
think it has to be.



I believe.they are GENERALLY connected to a bedroom circuit
- which also requires AFCI protection.. This is NOT a code requirement
but is acceptable best practice..

I don't see why connecting smoke detectors to a bedroom circuit is
best practice.

For the last few cycles AFCIs have been everywhere. Even in 02 when
they first showed up in bedrooms the smokes had to be on the AFCI.

They have to be on an AFCI, but it does NOT have to be on a bedroom
circuit. THAT is what is "best practice" and not required by code.

I bet the smokes are on a breaker with one of the bedroom ceiling
lights,

Please cite for us the code section that requires AFCI to be on an AFCI. For starters, it makes no sense. As I said, it's my
understanding that the requirement for AFCI is tied to where
the outlet is, not to what's on it. Today because AFCI is
required in the living spaces, if the smoke detector is in a
hallway, it would need to be on an AFCI. But the poster's
home was built in 2005 when AFCI was only required in BEDROOMS.
If his smoke detector is in a hallway, AFAIK, there was no
requirement that it be on an AFCI. His house could be prefectly
code compliant with the NEC code when built and if so, it's still
code compliant today. If you have a cite for the code
section that says that smoke
detectors here in the USA must have been on an aFCI in 2005
or even today, I'd like to see it.