Smoke detectors

Posted by ransley on October 24, 2009, 8:59 am

> =A0 I have some 20 y/o hard-wired smoke detectors that I want to replace
> with newer hard-wired ones. How do I figure out which circuit breaker to
> trip or is this an issue with smoke detectors?
> --
> To find that place where the rats don't race
> and the phones don't ring at all.
> If once, you've slept on an island.
> =A0 =A0 Scott Kirby "If once you've slept on an island"

Just curious, why replace them, they still work right.

Posted by Tony Hwang on October 24, 2009, 11:03 am

ransley wrote:

>> I have some 20 y/o hard-wired smoke detectors that I want to replace
>> with newer hard-wired ones. How do I figure out which circuit breaker to
>> trip or is this an issue with smoke detectors?
>> --
>> To find that place where the rats don't race
>> and the phones don't ring at all.
>> If once, you've slept on an island.
>> Scott Kirby "If once you've slept on an island"

>
> Just curious, why replace them, they still work right.

Hmm,
Not after 20 years!!! Would you trust that old detector?

Posted by Stormin Mormon on October 24, 2009, 12:19 pm

The radioactive isotope goes flat after a while. Normal
decay, you know.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
.

ransley wrote:

> Just curious, why replace them, they still work right.

Hmm,
Not after 20 years!!! Would you trust that old detector?

Posted by ransley on October 24, 2009, 2:05 pm

On Oct 24, 11:19=A0am, "Stormin Mormon"

> The radioactive isotope goes flat after a while. Normal
> decay, you know.
> --
> Christopher A. Young
> Learn more about Jesus
> =A0www.lds.org
> .
> ransley wrote:

> > Just curious, why replace them, they still work right.

> Hmm,
> Not after 20 years!!! Would you trust that old detector?

Decay of isotope, isnt that for Co detectors? Who says 20 years, the
Manufacturers of course. I have heard of no independant saying 20
years.

Posted by RicodJour on October 24, 2009, 2:25 pm

> On Oct 24, 11:19=A0am, "Stormin Mormon"

> > The radioactive isotope goes flat after a while. Normal
> > decay, you know.
> > --
> > Christopher A. Young
> > Learn more about Jesus
> > =A0www.lds.org
> > .
> > ransley wrote:

> > > Just curious, why replace them, they still work right.

> > Hmm,
> > Not after 20 years!!! Would you trust that old detector?

> Decay of isotope, isnt that for Co detectors? =A0Who says 20 years, the
> Manufacturers of course. =A0I have heard of no independant saying 20
> years.

Is the NFPA independent enough for you?
http://www.nfpa.org/itemDetail.asp?categoryID=3D1647&itemID=3D39905
It's unwise to base advice on things that you haven't heard of - very
possibly because you just haven't looked.

The isotope decay is not the reason that the detectors need to be
replaced.
This Wiki article gives an overview:
http://en.wikipedia.org/wiki/Smoke_detector

As far as locating circuits, I find a circuit breaker tracer
invaluable.
http://cgi.ebay.com/BRAND-NEW-SPERRY-CIRCUIT-BREAKER-FINDER-CS-500A_W0QQite=
mZ250517283209
A useful addition is a six inch piece of Romex with alligator clips
on both ends of the black and white wires. It makes it easy to use
the tester on wires instead of receptacles. Clip one end on to the
wires you want to test, and the other onto the receptacle plug-in
tester.

R

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Smoke detectors - Page 2