smoke alarms

Discussion in 'The Projects Forum' started by kio, Apr 25, 2009.

  1. kio

    Thread Starter New Member

    Dec 15, 2007
    1
    0
    Friend is having problem with interconnecting alarms,all alarms are connected with ac power but they only go off individually she would like them to go off all together,When she presses the test button the one she presses goes off only,they are all interconnected with 14 3 wire with red connected to the smoke alarms yellow interconnecting wire the red wire was powered,then she found out the red wire did not have to be powered because it should be isolated for battery back up usage so she says.So she stopped power going into the red wire and it still does not work the way she wants.The smoke alarms still do not go off all together when the test button is pressed.What does she need to do?
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Can you post the datasheet of the alarms?
     
  3. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Typically, such alarms have one wire for "hot," one for "neutral," and one to connect the detectors together.

    For "Kidde" or other systems in North America, wire white to white, black to black, and whatever is left over to red. Note well the red wire goes only between detectors and NOT back to the electric panel! Only the black and white wires should go back to the panel.

    If outside North America, consult your local expert.
     
  4. mariachristin

    New Member

    Mar 18, 2014
    3
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    I also facing the same problem...As i go through the comments its really helpful..
     
  5. inwo

    Well-Known Member

    Nov 7, 2013
    2,433
    315
    If I understand. Interconnecting wire was initially connected to power.

    I don't know the internal connections, but that can't be good.:eek:

    Suspect alarms are damaged.
     
  6. #12

    Expert

    Nov 30, 2010
    16,278
    6,790
    Right. Putting house power on the interconnect wire will burn out the circuits.
     
  7. mariachristin

    New Member

    Mar 18, 2014
    3
    0
    Can i change smoke alarm?
     
  8. #12

    Expert

    Nov 30, 2010
    16,278
    6,790
    Sure. Somebody installed them in the first place and you can install a different smoke alarm if you want to.
     
  9. mariachristin

    New Member

    Mar 18, 2014
    3
    0
    Hey thanks for your opinion.

    Is there any simple methods for maintenance of smoke alarm on daily basic?
     
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