Smoke detector

Discussion in 'Electrical Forum discussion & Blog' started by johnjh2o1, May 7, 2012.

  1. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

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    Location:
    South*East
    I am replacing two smoke detectors that are on the same breaker. I have three wires,one white one black and one red. How do I connect them?

    John
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

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    Location:
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    The third wire in the detector is often yellow...it is the lead that should be run between the two detectors so that if one goes off, it triggers the other one to sound as well. White and black are neutral and power, so it sounds like they expected the red to be that interconnecting lead. That's the normal thing, but yours could be different. With the power off and the detectors disconnected, if you turn it back on and measure from the red to ground or neutral, it should read zero. This assumes you feel safe about using a multimeter and won't hurt yourself. What brand and model?
  3. hollysurly

    hollysurly New Member

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    2
    Location:
    Scranton
    Safety tips

    Download these NFPA assurance tips on smoke alarms (PDF, 219 KB).

    Install smoke alarms in every bedroom, alfresco anniversary abstracted sleeping breadth and on every akin of the home, including the basement. Interconnect all smoke alarms throughout the home. If one sounds, they all sound.

    An ionization smoke anxiety is about added acknowledging to ablaze fires, and a photoelectric smoke anxiety is about added acknowledging to afire fires. For the best protection, both types of alarms or a aggregate anxiety (photoelectric and ionization) should be installed in homes.

    Test alarms at atomic account by blame the analysis button.

    Smoke rises; install smoke alarms afterward manufacturer's instructions top on a bank or on a ceiling. Save manufacturer's instructions for testing and maintenance.

    Replace batteries in all smoke alarms at atomic already a year. If an anxiety “chirps”, admonishing the array is low, alter the array appropriate away.

    Replace all smoke alarms, including alarms that use 10-year batteries and hard-wired alarms, if they are 10 year old or eventually if they do not acknowledge properly.

    Be abiding the smoke anxiety has the characterization of a accustomed testing laboratory.

    Alarms that are hard-wired (and cover array backup) have to be installed by a able electrician.

    If affable effluvium or beef sets off nuisance alarms, alter the anxiety with an anxiety that has a "hush" button. A "hush" button will abate the alarm’s acuteness for a abbreviate aeon of time.

    An ionization anxiety with a calm button or a photoelectric anxiety should be acclimated if the anxiety is aural 20 anxiety of a affable appliance.

    Smoke alarms that cover a recordable articulation advertisement in accession to the accepted anxiety sound, may be accessible in alive accouchement through the use of a accustomed voice.

    Smoke alarms are accessible for humans who are deafened or harder of hearing. These accessories use strobe lights. Vibration accessories can be added to these alarms

    Smoke alarms are an important allotment of a home blaze escape plan.
    ______________________________________________________________________________________

    “A woman is like a tea bag; you never know how strong it is until it's in hot water.”*
    Last edited by a moderator: May 18, 2012
  4. BobL43

    BobL43 DIY Senior Member

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    Location:
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    this needs to be tranlated to Engrish, then back to English, and then maybe I can make some sense of it; maybe not either.
    http://www.engrish.com/ WTF? Huh?
  5. Chad Schloss

    Chad Schloss Member

    Messages:
    329
    Location:
    USA
    the red wire is the interconnect wire that travels to the other detectors to set them off; if one goes off, they all go off. it is bad practice to intermix brands of smoke alarms (that are interconnected) if your other alarms are not interconnected, you can either tie the two new ones together, or cap off the red wire. you need to hook up the white and black wires to make the detector work.
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
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    Location:
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    This response is like the Microsoft one in my "Seattle" joke. Completely accurate and completely irrelvent to the question. How were the old detectors wired? If these are the only detectors they will probably work, but if there are others, then your new ones MUST be compatible with them to be interconnected and work properly. NOT interconnecting them is both unsafe and a code violation.
    Last edited: May 19, 2012
  7. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,626
    Location:
    Cave Creek, Arizona
    job

    quote; Don't pay someone to do a half-fast job when you can do a better job yourself with TerryLove.Com

    Have you EVER heard of a DIY job being "half fast" and not "half a**ed"? In fact, most of them are multiple "fast" as in "they take much longer than the professional would have".
  8. jimbo

    jimbo Plumber

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    Location:
    San Diego
    Is your last name LEMON?? Any relation:???
  9. Bowen

    Bowen New Member

    Messages:
    4
    Location:
    Pakistan
    Hi john, you have 3 wire black,red and white , I also have 3 wire but the colors are different I have white black and yellow,I think white and black is neutral and red one is interconnecting the lead. I think we have smoke detector of two different companies that's why the color of the wires are different.I think you need to mention the model of your smoke detector then may you get a correct answer.
    and thanks hollysurly for sharing such nice safety tips .
  10. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,626
    Location:
    Cave Creek, Arizona
    Hollysurly's reply is like asking someone how to get to the CircleK and they tell you the history of the city. If you are REPLACING smoke detectors, ALL of that "research" should have already been done, and if not it is probably too late to change it.
  11. Jim Port

    Jim Port Electrical Contractor

    Messages:
    156
    Location:
    Maryland
    Technical nitpick, those are smoke alarms, not detectors.
  12. DonL

    DonL Jack of all trades Master of one

    Messages:
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    Location:
    Houston, TX
    LOL.

    I have a clock that needs to be set, Can You please tell me how to build a new one ?
  13. BobL43

    BobL43 DIY Senior Member

    Messages:
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    Location:
    Long Island, NY
    for that you can ask a nut case
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