2

Today I installed some new Kidde PI2010 Hardwired Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup smoke alarms. I am interconnecting 5 of them in my home. When I hooked up the third one the other two went into alarm. I measured 120V on the red interconnect wire. Is this correct? I'm reading here that it should be 9V?

Any help would be appreciated.

4
  • Hello, and welcome to Home Improvement. Doesn't sound right to me, but you probably should contact Kidde's tech support to be sure. And, you should probably take our tour so you'll know the details of contributing here. Sep 11 '20 at 17:56
  • white is 0V (neutral) , Blk is hot AC and Red is alarm , yes Red to White is DC , probably 0V for alarm (relay closed) Sep 11 '20 at 18:15
  • Can you provide a picture of the wiring?
    – MonkeyZeus
    Sep 11 '20 at 19:09
  • Can you post photos of the wiring at all alarms please? Sep 12 '20 at 1:12
3

Thank you all for comments. I was able to figure out the problem. Apparently the smoke alarm is polarity sensitive. Because of a wire change in the associated junction box, standard USA black and white was changed to British blue and brown. The brown is supposed to be connected to the black and white to blue, but they were reversed. Correcting this solved the problem. Now when the alarm is in "alarm mode" (test) it sends 18V on the red wire to the other alarms. and NOT have a constant 120V

6
  • Why do you have black/white (NEC) and blue/brown (IEC) colors in the same building? Where are you on this planet? Sep 19 '20 at 20:49
  • 2
    I am in The Caribbean on an island that is traditionally the British system and 220V. However my house is wired like an USA system and is 110V. While I can get most American fixtures and wires to purchase NO hardware store or electrical supplier on Island has American (black/white) romex type wire only the British brown/blue. So any exposed wire (surface mount) is British brown/blue. I plan to order this to have on hand for the next project. Southwire 28827421 25' 12/2 with ground Romex brand SIMpull residential indoor electrical wire type NM-B, White
    – Sean
    Sep 24 '20 at 1:33
  • 1
    Fascinating -- what do your local authorities use for wiring standards? Sep 24 '20 at 1:36
  • Good Question. I guessing a combination of both British and American depending on the application. I will ask.
    – Sean
    Sep 24 '20 at 1:39
  • I think uk power would not be split phase, but I assume that's what you must have? Ie 220 or 240 mains but then a panel with a neutral? Nov 5 '20 at 19:46

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.