Smoke alarm location

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jetlag said:
Thank to all for replies, one more question, Is there any thing in code about a seperate circuit must be ran to smoke alarms, I have heard this but never found it in the code, as far as i know you can tie into the nearest circuit .
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NEC 210.12 - I believe this says all 120v circuits in bedrooms must be AFCI protected and that would include smoke detector circuits. What do you think?
 
jxofaltrds said:
Got a link for that?
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Sorry, I don't have a link. The ICC Electric Code can be adopted as a stand alone or as our jurisdiction did; It is also Appendix K in the 2006 IBC, so we adopted the appendix.

I don't have anything to back this up because I can't remember where I found it (probably an age thing) but, I read where the interconnectig wire shall be part of the same cable assembly. Maybe someone sharper than me can post the source of that last statement.
 
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acrwc10 said:
It is not required to have them on a single or separate circuit. If you have 11 smoke detectors they can be fed from 11 deferent circuits (with lighting, receptacle, etc.) the only thing is they need to be inter connected, this can be done by wired or wireless means. Remember also the lead that interconnects them is not at line voltage, they are battery backed up so the voltage would not exceed the battery voltage, and I believe they are on a signal/frequency anyhow.
I have used a Kiddie brand wireless in a house where one of the hardwired ones was missed and it worked great.
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the instructions say the interconnection and the power supply must be in the same cable , there is no way to do that connecting each alarm to a different circuit , the supply and interconnection must come from the next alarm :confused:
 
jetlag said:
the instructions say the interconnection and the power supply must be in the same cable , there is no way to do that connecting each alarm to a different circuit , the supply and interconnection must come from the next alarm :confused:
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Don't forget, this is one company's instructions. As far as the NEC, there is no requirement they be on the same circuit. It would not surprise me if the majority of them say the same thing.
 
K8MHZ said:
I read that as to be not more than one circuit, not a dedicated circuit. If all the interconnected smokes in the house are powered off the same bedroom lighting circuit, that would still be a single circuit.
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Yes that is correct. I was addressing multiple feeds not the dedicated question.
 
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