Questions tagged [smoke-detectors]

Device for detecting smoke and/or fire.

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65 views

Does my smoke alarm battery need replacing?

I live in a flat in the UK. The flat is about 6 years old, and I moved in 4 years ago. The flat has a built in smoke-detector, and over the past few days, it has started 'going off' for about 10 ...
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2answers
11k views

How did a circuit that was shut off at the breaker almost kill me?

I just had a near-disaster while trying to install new smoke detectors. My house has AC hardwire connections for the smoke detectors. I wasn't sure which circuit the smoke detector AC connection was ...
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1answer
43 views

FIVE hardwired smoke/CO2 detectors, 4 on one floor in close proximity, PLUS ADT smoke/CO2 detector separately

Moved into a "new to us" home a few months ago. Made a small renovation (halved the kitchen and created a spare room). Four usable rooms total and a furnace/hot water heater utility room ...
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3answers
71 views

Photoelectric smoke detector, AC refrigerant, and a false alarm

I purchased a house about 7 months ago and found it had interconnected AC smoke/CO detectors that were all unplugged. Not knowing the age of them I replaced them all using photoelectric smoke/CO ...
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0answers
72 views

Smoke/CO Detector Location Within A Bedroom

This question concerns smoke/CO detector placement within a bedroom (the code is pretty clear regarding outside-of-bathroom & distance-from-kitchen-appliances). Given a 12x10ft bedroom, with the ...
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1answer
78 views

Are smoke/CO detectors required to be interconnected with wire?

I am planning on hardwiring 6 combination smoke/CO detectors on various levels of the house (2nd flr, 1st flr, basement) using 12/2 wire branching off from permitted sources (standalone 20a outlets). ...
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2answers
148 views

A spark while installing a smoke alarm

Short story: the black wire sparked when installing a hardwired smoke detector as I had left the power on. After properly turning off the power, I completed the installation and now everything works ...
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2answers
2k views

What is this electrical fixture above a natural gas fired forced air furnace?

While visiting my mother-in-law, we wanted to get the smoke detector situation in her house up to par (this is in Massachusetts, we're from Europe, though). She has a natural gas fired forced air ...
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1answer
44 views

Will most battery-powered smoke detectors attach to other back plates?

Need to replace a battery powered detector. Do most of them have the same sort of back plate or will I generally have to attach a new back plate? Do they usually come with a back plate?
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2answers
104 views

Can I wire a smoke detector so that it disables my furnace if smoke is present?

I have a standard Johnson Controls Unitary Products TM9V*MP board in my furnace wired to a nest thermostat. Can I wire my duct smoke detector so that it splices the R wire going from my furnace to my ...
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33 views

What smoke detector fits this bracket

There is an empty bracket for a smoke detector in the hallway. See picture. What brand/model of detector uses that kind of bracket?
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1answer
59 views

Hard-wired smoke detector chirps when light switch flipped

I have a hard wired smoke detector that is connected to the same circuit breaker as the two hallway lights. The two switches at the end of the hallway do not turn the smoke detector on and off, ...
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4answers
148 views

Why is a smoke alarm chirping at specific times of the day?

I have a smoke alarm (Kiddie) that is beeping regularly (every 30 seconds or so), what I would typically associate with a low battery. The strange thing is that the beeping is only happening between 5 ...
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1answer
71 views

Signalling a smoke alarm from interconnected (hardwired) detectors to an alarm panel

IMPORTANT NOTE: When reading the question below, keep in mind that Maryland law defines a "smoke alarm" as "single or multiple station device ... including a built-in internal alarm [...
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26 views

What do I do if some of my smoke alarms ac power doesn't work?

I have 5 smoke detectors in my home, 2 of them have the green ac power light on and are interconnected. Those 2 are on opposite sides of my home from each other but I have 3 on 1 side but those don't ...
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1answer
47 views

Apartment Fire Code [closed]

Recently had a main transformer blow in my apartment building, whole place was without power, but we did discover that the fire alarms had no backup power source to allow the alarm pulls to still ...
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1answer
32 views

Where should I put the Google Nest smoke alarm in this room?

I have a large open plan kitchen dining and living area with a high vaulted ceiling. The ceiling meets two separate one-sided peaks in two places on the wall. I'd like to put a single Google Nest ...
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2answers
84 views

Is there a technical reason why there are seemingly no smoke detectors that are battery operated, dual sensor, and interconnected?

I've viewed dozens of "top X smoke detectors of 2020" sites, and scoured the leading brands' sites (Kidde, First Alert, and Nest), but I can't find any that are battery operated, dual sensor ...
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1answer
86 views

Hardwired Smoke Detectors, go with sealed battery units or unlocked with lithium 10 year batteries

Not sure if this is the right place to discuss and can't find an exact answer in the other discussions. My smoke detectors were manufactured in 2009 so its time to replace. They are hardwired and ...
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1answer
268 views

Smoke detector wiring - black wire in 3 wire appears to be damaged. Can I use power from AFCI circuit to power but use red wire to interconnect?

I have ~10 smoke alarms (one per bedroom, one per hall). Somehow the last one isn't working. The green light didn't go on. I've done some troubleshooting - swapped the connectors and swapped the ...
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1answer
322 views

What should I do with the wires before I put a cap over the hole left by my (broken) electric smoke alarm?

We have a wired smoke alarm system. We've lived here 9 years and I have no idea if they work or not, so I installed battery-operated ones in pretty much every room. One day the wired one upstairs was ...
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1answer
45 views

How to connect fire (smoke or thermal difference), gas and CO alarms wirelessly?

There're detectors for smoke and thermal differences matching the characteristics of fire, carbon monoxide (CO) as well as natural gas. For some reason only some are combined (in the room where the ...
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1answer
58 views

Can Hardwired Smoke Alarms beep without power? [closed]

I have a hardwired smoke alarm that beeps even when I take the batteries out, unplug it from the outlet, and remove its cellularies. I was wondering if this is possible and if so, how long can they ...
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1answer
43 views

Is there a smoke alarm which can be hushed in DENSE smoke? [closed]

Every smoke alarm I've ever owned has a "hush" feature allowing you to push a button and stop a false alarm, for instance one caused by cooking. However, they all state a caveat in the owner'...
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2answers
138 views

Do Smoke Alarms have timers in them?

In my old residence, we had a smoke alarm that would always go off at 7 AM every Sunday. But whenever the power would go out it would go out at another random time, the first time was 3 PM every ...
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68 views

Could induced voltage cause interconnected fire alarms to activate?

After several weeks of the interconnected smoke alarms, I have had two momentary false alarms. I am yet to figure out why or what is causing this. Strangely they have both occurred at night causing me ...
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36 views

What type of wire to use for an overhead drop. For Fire Alarm system?

Type of wire needed? It seems to be a #14, 3 wire SO cord which was not the correct wire to use it has broken down in the sunlight. The insulation is brittle and it some places removed.
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1answer
57 views

Make-up Air intake tripping smoke alarm

I have the MUA intake vent on the patio of my condo, located on the ground floor, so the patio has a ceiling. Frequently when I barbecue, smoke rises and moves to MUA intake, and gets into the ...
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1answer
88 views

How can I pick a smoke detector that only detects smoke and not heat?

Currently, my home's smoke detector is situated right outside our bathroom in the hall. Whenever someone takes a hot shower (usually me), the steam escaping the bathroom trips the detector, presumably ...
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1answer
815 views

Lights on same circuit don't work after replacing smoke detector

The big picture is that I replaced a smoke detector and now I can't get the light switches on the same circuit to work. I'm in an place that I recently moved to and don't have detailed electrical info ...
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1answer
288 views

Should the interconnect wire for smoke alarms read 120v?

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 ...
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1answer
4k views

What do I do with the ground wire in a smoke detector install?

The electrician ran 14/3 to a metal box. There is no grounding post on the Kiddie i12010s smoke detector. Can I just cap the ground and call it done? Doesn’t seem right but I’m not sure how to ...
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1answer
610 views

Should smoke detectors be on AFCI/GFCI breakers?

I've heard conflicting advice whether smoke detectors should be on a simple over-current breaker or a AFCI/GFCI breaker. On one hand you want the circuit to be as reliable as possible and since there ...
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1answer
441 views

Smoke detector placement in long open concept space

I've just moved into a new house and it doesn't have a smoke alarm on the main floor yet. The main floor is a long rectangular open concept design, with living room at the front near the front door, ...
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2answers
63 views

Sprinkler system & smoke detectors - Illinois code requirements when closing loft

I am looking to close a loft and turn it into bedroom. I live in Illinois and house (built on 2007) has fire sprinkle system and smoke detectors through all the floors. After closing loft there will ...
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1answer
107 views

Remove CO detector From wired alarm system

My house has a wired smoke alarm system, three smoke detectors and one CO detector. These are all old firex detectors, I am replacing them with three kiddie smoke alarms where one is combo CO + smoke ...
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1answer
24 views

Smoke detector position vs air register

Are there regulations about positioning a smoke detector in the vicinity of an air register? I would like to position it within 3 ft aerial distance but I'm concerned the air flow might be blowing ...
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0answers
93 views

Repurposing smoke detector power as fixture power

I removed a wired smoke detector and replaced it with a popular wifi-enabled battery-powered model. I'm left with a box that has: a black wire a white wire a red wire a ground I'm assuming the ...
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0answers
49 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
162 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
39 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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3k 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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1answer
367 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
971 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
145 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
95 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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2answers
13k 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
1k 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
943 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 ...