Questions tagged [smoke-detectors]

Device for detecting smoke and/or fire.

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0answers
40 views

What could cause smoke detector false alarms in different rooms, a few days apart?

We purchased a 17-year-old home in Florida (USA) a few months ago, that has seven smoke detectors (one in each of its four bedrooms, two in hallways, and one in the main living space). A few days ago,...
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3answers
58 views

How can I lift the latch of the battery compartment in this smoke alarm detector?

First of all, I'm a bit embarrassed I cannot figure this out myself. I have looked up Youtube videos, Google searched but I didn't find any exact video. Plus I have tried pressing it hard, lifting ...
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2answers
34 views

Wiring smokes in series: one smoke beeps a lot

We wired three smokes. However, every so often (but always in the middle of the night) one of them starts beeping. I suspect that it is not actually being powered by electricity, but off the battery. ...
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0answers
291 views

Can a smoke alarm with cut wires cause a fire?

Can a smoke alarm with cut wires cause a fire? Not, that it might not detect a fire (I don't expect it to any more), but that the smoke detector itself may cause a fire. For my specific case, I cut ...
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0answers
99 views

How do i replace the battery in this smoke detector? It wont stop beeping

Its been beeping for ages and im sick of it, ive tried sliding as it says to but ive had no luck...
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4answers
2k views

Should lintels above wall portals be considered for smoke alarm placement?

I need to place a smoke alarm on my first floor (no sleeping areas). There is a wall portal with a 15" lintel (see image) between the living room and the dining room. I am unsure whether one alarm is ...
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4answers
114 views

Should my carbon monoxide detector be reporting zero PPM?

I've got a Carbon monoxide detector hanging in my kitchen for a few years now. Lately I've noticed it reads a PPM of 0 (zero). Is this right? Doesn't the air contains around 400 ppm? In other words, ...
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1answer
123 views

What is this electrical device?

At 3:30 am a couple days ago, the smoke detectors went off. Not the 'low battery' noise, but full alarm triggering the others to sound off as well. I checked around, and with no actual issue, pulled ...
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1answer
87 views

one-too-many smoke detector cavities?

There are two cavities in the wall. I want to replace the old smoke detector. Questions: (1) What's the big metal square thing on the right in the lower cavity, and did the lower cavity once house a ...
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1answer
12k views

What on earth is this small wall-mounted computer?

I live in a rented apartment, and there is this little plastic box on the wall that I had been ignoring. Here is what it looks like: There are no markings or holes on the casing. I got curious and ...
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2answers
97 views

Smoke detectors are on dedicated circuit, how can I add a light to that circuit?

The smoke detectors are currently wired to each other (2 wire) on a dedicated circuit. We want to add something that gets used often, so that we'll notice if the circuit has tripped. We would like ...
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2answers
859 views

Is this smoke detector safely connected?

I recently bought this house (built in 2000), so it went through inspection. I assumed everything was fine. I realized the smoke detector in one of the rooms was not showing the green light that the ...
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1answer
35 views

Smoke detectors (wired/wireless) - how much is enough

Our house is fairly new (2013 build year). We moved in 2016. On the second floor we have 3 wireless smoke detectors and 1 wired and on the first floor we have 1 wired smoke detector and 2 wireless. ...
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2answers
87 views

Do there exist smoke detectors with detached silencers?

I'm looking to replace a smoke detector for my kitchen, and I was wondering whether anyone had designed a smoke detector with a remote silence feature. The traditional method of keeping a stool or a ...
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3answers
84 views

Two identical fire alarms- different pitch

I recently purchased a twin pack of Kidde smoke detectors. One thing I noticed is that one sounds off at a slightly higher pitch than the other. A friend purchased two detectors of the same mode as ...
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0answers
61 views

Replacing an interconnected fire detector triggers the fire detectors in the rest of the house

I bought a Kidde KN-COSM-IBA to replace a 6 years old Firex i4618A detector that won't quit chirping even after battery replaced. Both the old and new detectors has the same wire quick connector that ...
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1answer
1k views

Nest Protect Expiration Date

I just bought a set of Nest Protects and after opening the first one I noticed that its manufacture date was almost a year ago and that the expiration date was 10 years from the manufacture date, not ...
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1answer
281 views

Counting Smoke Detector Wires In Junction Box

I want to connect a wire to get power for for a ceiling fan to an existing junction box in the attic that is used right now only for a smoke detector. Box currently has a 12-3 wire coming in, and the ...
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1answer
50 views

Trigger an alarm with wired smoke detector

I am looking for a solution that would make the wired smoke detector in the apartment downstairs trigger an alarm. The purpose is to be alerted if there is smoke while the tenant is away/in the shower....
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1answer
69 views

Combine Lights on one switch and remove smoke detector from switch

Experts, I've got a weird wiring situation in my kitchen (just bought the house). "A" (a dimmer) in the picture controls both a light (let's call it light "X") and (wait for it) the smoke detector! ...
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1answer
83 views

Smoke detector at highest point of pitched ceiling - good or bad?

I have several smoke detectors in my house - all of which I can reach with a ladder - except one. It is at the highest point of the pitched ceiling in the entry way of my house. A person that is 6'5"...
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1answer
87 views

Over-enthusiastic smoke detector

The hard-wired smoke detectors in my house all were well beyond their rated expiration. So I replaced them all. I now need to keep a broom handy whenever I use my oven or broiler -- the smoke detector ...
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1answer
71 views

Testing a wired smoke detector system, with in-ceiling fire suppression - how to test detectors

...without setting off the sprinklers? I'm not sure wired detectors (on 3 floors of a condo) are connected to the in-ceiling fire sprinklers, so... How do I determine the detectors are all working/...
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1answer
94 views

How to interconnect Kidde smoke/co combo detectors Mod# KN-cope_IC with Edwards Heat detectors Mod# CR-135-2 using relay SM120X

How do you wire the above units so the smoke/co detectors will all ring when heat detectors are activated. The heat detectors are a two wire hook-up. Existing wiring to heat detectors is existing and ...
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1answer
437 views

Wired fire/smoke alarms not communicating with each other

After replacing the wired fire alarms in my house with new ones, when testing any of them, that one beeps but not the others. Model is BRK First Alert 9120B6CP. Each alarm came with three cables. ...
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2answers
233 views

install smoke/fire detector in basement

I would like to install smoke detector in the basement, which has the following layout: +----------------------------------------+ | | Small ...
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4answers
4k views

Are rechargeable 9-volt batteries suitable for use in smoke detectors?

Lithium-Ion rechargeable 9V batteries are now readily available. Are they appropriate for use with hardwired smoke detectors, which typically use 9V batteries as battery backups? What about for use ...
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5answers
11k views

CO detector starts beeping every morning at 6am

My 2-years old CO detector (small, wall-mounted device with battery, no other power source) started beeping every morning for at least few minutes, sending sharp chirps once every 10 sec. It starts ...
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1answer
783 views

How can I open this smoke detector to change the battery?

I don't know the model of this smoke detector, but it's beeping from low battery and needs to be changed. I can't figure out how to open it, so hoping someone can help! Here are some photos of it: If ...
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3answers
482 views

Can I mount a smoke alarm using magnets?

I am installing smoke alarms in my 1930s house. I'd rather not drill into the plaster at this time, but I want to get them mounted. I have drywall beads along the top of all my walls, so I was ...
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1answer
117 views

How can we disable an unused smoke detector?

We have wired ADT smoke detectors now. Our old free standing detector is chirping. How can we disable it without taking it off the wall?
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2answers
205 views

Can central alarm smoke detectors be used instead of 120v smoke detectors in a new residence?

Code requires that new residential construction have a smoke alarm in each bedroom and outside of each bedroom, and that the smoke alarms be interconnected. (They all go off at once). If you plan to ...
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2answers
54 views

Does home security system only link to wire-powered smoke detector but not the battery-powered ones?

Currently my home has battery-powered smoke/CO detectors, I wonder if in the future I am setting up a home monitoring security system with commercial company for the whole house (to detect things like ...
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3answers
7k views

Why should we replace smoke alarms every 10 years?

I'm having a hard time understanding a requirement to replace smoke detectors every 10 years (or whatever the manufacturer suggests). With previous generations of ionization based detectors, I ...
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2answers
2k views

Red wire in ceiling box: traveler or smoke alarm interconnect?

I have an electrical box in the ceiling, currently with all the wires capped and a blank faceplate over it. Two cables coming in, both with four conductors (black, white, red, and bare). I don't know ...
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3answers
397 views

Are all of these smoke detectors required?

My house has eight smoke detectors; one in the basement, one in an upstairs bonus room, and six on the main floor. The main floor is "T" shaped; the bedroom area forms the top of the "T", and the ...
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3answers
609 views

Smoke detectors & backup generators

My home was built in 2014; California code requires hardwired smoke detectors. I also have a 10kW Generac whole-house standby generator. Whenever I lose power, every smoke alarm in the house gets ...
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3answers
181 views

Is it permissible to install a low-voltage fixture over an existing ceiling box?

I inherited an installation of several wired AC smoke detectors. They're three-wire units (AC hot/neutral, plus an interconnect wire). At some point a previous installer removed one of the detectors, ...
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1answer
171 views

How can I verify the integrity of smoke detector interconnect wires?

I inherited an existing installation of four smoke/CO detectors. They are all First Alert 3-wire AC-powered units. The test button on each detector produces some weird behaviors: Some detectors only ...
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3answers
4k views

Chirping from a hard-wired fire alarm

I know that when you hear a periodic chirping noise from smoke detectors, it means the battery needs to be replaced. I had been hearing such a chirping noise in my apartment building for a few hours, ...
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2answers
1k views

Can a smoke detector circuit be GFCI and CAFCI protected?

I purchased a dual GFCI/CAFCI circuit breaker to place on my circuit that contains only smoke, CO, and heat detectors inside my house. Is there anything wrong with this or can I install it to have ...
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2answers
159 views

Explain different type of fire detector?

I bought a house and just replaced 8 hardwired smoke alarms that were 10+ years old units like this. They had the typical high voltage red/white and red interconnect wires, with thick wires. However ...
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1answer
122 views

Is it possible to use a single wire smoke alarm with an alarm system?

I'm in the process of installing an alarm system that supports 2 or 4 wire low voltage fire alarms. The house is wired with high voltage single wire smoke alarms. As I understand it, there are ...
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2answers
140 views

Nuisance smoke alarms

Recently, four of the six battery-operated smoke alarms in our house have started going off every few days, for no obvious reason. The four that have been going off are of three different models, ...
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0answers
429 views

Smoke Detector wiring - impacted by 2 breakers?

dig if you will the picture of one of my smoke detectors and the curious (for me) wiring. Actually, I've taken many pictures, but each is just a mess and I think will make it harder. We have ~7 ...
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3answers
203 views

Continue to use hardwired smoke detectors?

I am going to replace all the old hardwired smoke detectors in my house. In my research I have found some of the features available include 10-year batteries and dual sensor types (photoelectric &...
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0answers
532 views

Smoke alarms start beeping after switching on the mains

I have two smoke alarms in my flat. Recently I had to change the battery for one of them, so I switched off the mains, disconnected the alarm, replaced the battery, tested it, and reconnected the ...
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1answer
1k views

electrical - preparing smoke detectors for rough inspection

To get past the rough inspection, should I have the wiring for smoke detectors just pulled through the ceiling box (and stripped, pigtailed etc) or should I have the mounting bracket (for the detector)...
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1answer
85 views

Removing 1 connected smoke detector ok?

We have a 2 story house that currently has the following interconnected Firex smoke detectors: Basement First Floor Second Floor Unfinished Attic We've been having issues with the one in the ...
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2answers
1k views

Help installing Nest Smoke/Co alarm to capped ceiling light wires

I am trying to install a Nest Protect (co/smoke alarm) and need to connect a black wire to the power line (which is the the one with the red cap after I used a voltage detector) and the white wire to ...