Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [smoke-detectors]

Device for detecting smoke and/or fire.

1
vote
1answer
59 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 ...
6
votes
7answers
22k views

Should a smoke alarm be installed in the attic?

I installed hard-wired and interconnected smoke alarms through the house. I wondered, though, if a fire spread through my attic I might not know about it until the ceiling or roof collapsed. Should I ...
5
votes
4answers
3k views

What's the signalling voltage on hardwire smoke detectors? Mix and match?

What is the signalling voltage on hardwire smoke detectors? Is it acceptable to mix brands? Is it acceptable to have detectors on different electrical circuits, connected only with an interconnect ...
4
votes
6answers
40k views

How to open this smoke detector in order to change battery?

I need to change battery for my home smoke detector, but I have no idea how to open this model. I found many video tutorial on google, but have not seen any model similar to this one. Does anyone ...
2
votes
1answer
69 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. ...
4
votes
5answers
55k views

What besides smoke might trigger a hardwired smoke detector?

Sometimes my hardwired smoke alarm goes off for a few seconds for no apparent reason. For example I am not cooking or burning any substance. It is 3 years old and has a new battery. Other than ...
0
votes
1answer
24 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 ...
0
votes
1answer
37 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....
1
vote
1answer
59 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! ...
1
vote
1answer
53 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 ...
0
votes
1answer
43 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"...
0
votes
1answer
45 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/...
24
votes
3answers
6k 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 ...
1
vote
2answers
63 views

install smoke/fire detector in basement

I would like to install smoke detector in the basement, which has the following layout: +----------------------------------------+ | | Small ...
15
votes
5answers
7k 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 ...
9
votes
4answers
6k views

Can I replace an electric smoke detector with a combined smoke and carbon monoxide (CO) detector?

My house has electric smoke detectors wired into an ADT alarm system. I'm not using the alarm system but the smoke detectors seem to work anyway. I'd like to have carbon monoxide detectors too. ...
12
votes
4answers
3k 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 ...
4
votes
3answers
7k views

What could cause the battery in a smoke detector to heat up?

One of my smoke detectors was chirping and when I removed the 9V battery, I found it was hot. In fact, it was making a 'cooking' sound. Was it the smoke detector causing the battery to cook itself ...
11
votes
7answers
9k views

How to PROPERLY test that your smoke detectors work?

I installed two new smoke detectors in my house a few months ago and have been testing them using the 'test' buttons. Today I decided to give them a more realistic test by placing a burning and then ...
17
votes
5answers
16k views

How do I choose between ionization and photoelectric smoke alarms?

I need to change my smoke detectors but I don't know how to choose between ionization and photoelectric smoke alarms. I guess that there are pros and cons to choose one or the other. Should I buy a ...
2
votes
1answer
383 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 ...
8
votes
2answers
29k views

If I do not have any fuel burning devices, do I need a carbon monoxide detector?

Is there any reason that a home without any fuel burning devices would need a carbon-monoxide detector?
1
vote
3answers
3k 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, ...
0
votes
2answers
52 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 ...
0
votes
3answers
213 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 ...
0
votes
1answer
89 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?
4
votes
2answers
143 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 ...
1
vote
3answers
102 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, ...
1
vote
3answers
262 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 ...
1
vote
2answers
1k 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 ...
1
vote
3answers
362 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 ...
7
votes
1answer
7k views

Is it OK to mount a smoke detector vertically?

In my basement I have several lolly columns attached to wooden beams that are supporting the floor joists. On one of these wooden beams I have attached a smoke detector vertically on the side of the ...
0
votes
1answer
116 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 ...
0
votes
1answer
943 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 ...
2
votes
2answers
131 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 ...
0
votes
1answer
118 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 ...
3
votes
2answers
125 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, ...
2
votes
0answers
338 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 ...
3
votes
3answers
184 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 &...
1
vote
0answers
501 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 ...
1
vote
1answer
714 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)...
2
votes
1answer
84 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 ...
6
votes
9answers
13k views

Why does my smoke detector chirp when my bathroom lights are turned on?

We have an wired smoke detector that is right outside a bathroom. Often, when we turn on the lights in the bathroom, the smoke alarm will chirp. The bathroom used to have a fixture with 4 40-watt ...
2
votes
3answers
6k views

What to do with these tiny exposed wires?

We discovered a non-functional smoke detector that's hard-wired into the electrical system of the house we recently bought. I removed the smoke detector and am replacing it with a battery operated one....
0
votes
2answers
957 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 ...
1
vote
1answer
132 views

4-Wire smoke detectors with home runs

Our house has 10 wired smoke detectors. They are currently 2-wire sensors - but each is on a separate home run back to the panel...each has an EOL resistor at the detector. The old panel (a DMP I ...
1
vote
1answer
2k views

Smoke Detector Alarm keeps on beeping

I have 6 inter-connected smoke alarms and one of them won't stop beeping. I replaced 4 of these alarms. The 2 I haven't replaced were newer ones installed by the previous owner in 2008. I have ...
6
votes
2answers
2k views

What should I do about this smoke detector that beeps constantly?

My smoke detector beeps constantly when connected. Looks like I need to change the battery. But I have no clue where to put in the battery or how to change. Your help will be appreciated. The unit ...
0
votes
2answers
425 views

Using FPL (18/4 ) cable for 120v Smoke detectors

Currently have 18 smoke detectors inter-connected to a Vista 20 panel with 18/4 FPL cable. We are selling (sold) the house, but have to replace all detectors since they are more than 10 years (...
2
votes
2answers
3k views

Need help with correct wiring when replacing a hardwired smoke detector

I was wondering if someone with some electrical experience or experience with these particular smoke detectors can assist with the replacement process. I have a home security alarm system that has ...