ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
twh 3
Recent Posts
Nec circuit protection
by gfretwell. 11/21/17 11:01 PM
FPE in Germany
by Texas_Ranger. 11/19/17 07:30 AM
Ceiling fan distance from outdoor hot tub
by gfretwell. 11/16/17 02:18 AM
diazed fuses
by Texas_Ranger. 11/13/17 03:02 PM
Theft deterrent alarm
by gfretwell. 11/12/17 01:39 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
242,614 Are you busy
178,812 Re: Forum
170,051 Need opinion
Who's Online Now
0 registered members (), 22 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#195538 - 08/09/10 07:52 PM False Alarm Smoke Detectors....  
site351  Offline
Member
Joined: Jun 2007
Posts: 19
Tennessee

O.K.... Every once in awhile I get these call backs
for Residential interconnected 120 V. battery back-up
Smoke Detectors. Its bad enough with Arc faults and
Ground Faults so I always try to include several
Manuals so the Customer and Builder are aware of Reset
buttons and what proper procedures need to be taken.
If I have 10 or 12 Interconnected Smoke Detectors and
"Phantom Nuisance" False Alarms...whats the best way to
find out which one is the offending Alarm ?
Sometimes these things will work correctly and then at
2 in the morning one will mysteriously trip ?

Is there quick way to narrow this down ? thanks



Work Gear for Electricians and the Trades

#195545 - 08/10/10 11:16 AM Re: False Alarm Smoke Detectors.... [Re: site351]  
sabrown  Offline
Member
Joined: Dec 2002
Posts: 302
Ogden, Utah, USA
I have found that the 2 am nuisance alarms are typically just beeeping saying the battery is dead. The batteries as the building cools down drop below the low battery threshold (though not exactly the same, a lead calcuim battery will drop 3.75 mV per degree C). Then the building warms back up and the beeping stops. As I am cheap and won't replace the batteries until death, my wife or kids are a lot better at finding these than myself. But this may not address the issue you brought up.

Phantom alarms always seem to happen at night, and those typically for me have been the neighborhood spider crawling in and sometimes setting up home in photoelectric types. The offending unit usually blinks red while alarming if memory serves. That is the only way I know of short of opening them all up.

Sad thing is, my wife is the only one who gets up for these problems. I barely come to, and my kids never miss a moment of sleep.

Shane


#195551 - 08/10/10 01:33 PM Re: False Alarm Smoke Detectors.... [Re: sabrown]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,136
Estero,Fl,usa
Quote
Sad thing is, my wife is the only one who gets up for these problems. I barely come to, and my kids never miss a moment of sleep.


That sort of defeats the purpose doesn't it wink

Fortunately/unfortunately I have a dog that goes nuts when any beeper goes off so nobody will sleep through it.
If it is a fire alarm, good dog!
If it is a UPS (or 3) complaining about a switching transient, not so much.
I have disconnected the beeper on most of them.


Greg Fretwell

#195552 - 08/10/10 01:43 PM Re: False Alarm Smoke Detectors.... [Re: gfretwell]  
mikesh  Offline
Member
Joined: Jun 2006
Posts: 613
Victoria, BC, Canada
Apparently smoke alarms are less effective in waking kids. Some models have voice alarms in addition to the irritating beeps. I think there is one coming or maybe available that can record the wake up (Insert name of person) there is a fire message in your own voice which is much more effective at waking kids. I know my sister (not a kid) could probably sleep through and earthquake accompanied with a flood and explosions. She wakes for the alarm clock however.


#195554 - 08/10/10 01:53 PM Re: False Alarm Smoke Detectors.... [Re: mikesh]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,136
Estero,Fl,usa
Make a noise like the ice cream truck wink

... or am I just showing my age?


Greg Fretwell

#195653 - 08/16/10 10:55 PM Re: False Alarm Smoke Detectors.... [Re: site351]  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,223
SI,New Zealand
351,
That's a really interesting question you ask.

I've had problems like this in the past and wished to God that smoke detector manufacturers would at least put a "tripped" LED and a reset button on their units, it would make fault-finding these systems a heck of a lot easier and faster.
For something as important as a smoke detection system, you'd think that this would be a given thing with inter-connected type detectors?


#195658 - 08/17/10 12:23 AM Re: False Alarm Smoke Detectors.... [Re: Trumpy]  
noderaser  Offline
Member
Joined: Mar 2007
Posts: 404
Portland, Oregon, United State...
Reminds me of a comical scene where I forgot to open the damper on the fireplace, and had to go around the house with a ladder ripping the stupid smoke detectors off the ceiling so they would shut up. Fortunately, nuisance alarms (ones not involving smoke) haven't been a problem.

If the standard residential smoke alarms aren't loud enough for you, suppose you could go with the commercial ear-shattering type. I'm surprised there haven't been any lawsuits for hearing loss with those things. I've also lived in a building where they had alarms with a klaxon and audible warning; "Attention! Attention! An emergency has been declared. Please exit the building via the nearest available stairwell." Not exactly fun to wake up in the middle of the night with a strange voice screaming in your ear.


#195660 - 08/17/10 12:57 AM Re: False Alarm Smoke Detectors.... [Re: noderaser]  
leland  Offline
Member
Joined: Aug 2007
Posts: 853
Lowell area, Ma. USA
Fire-EX- Known for this problem. bad QC.

As far as annoying- thats by design- made to make you want to exit the area.

Complain all you want- they really do SAVE LIVES- (When operable)



Member Spotlight
Joe Tedesco
Joe Tedesco
Boston, Massachusetts USA
Posts: 2,749
Joined: October 2000
Show All Member Profiles 
Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.015s Queries: 15 (0.003s) Memory: 0.7961 MB (Peak: 0.9582 MB) Zlib enabled. Server Time: 2017-11-22 12:48:06 UTC