Re: Why I Don't Do Service for Other Companies

[Nomen Nescio <nobody@xxxxxxxxx>]

Jim said:

>So then it follows ...... that (in my area), all newly built homes are
>required to have  smoke detectors, inside and outside sleeping areas
>and on each level ...... always installed by the electrician.  But, in
>newer homes where that requirement has been met, there is no
>requirement that an after market installation by an alarm company would
>have to meet and therefore one system smoke detector could be
>installed, if that's all the homeowner wanted.

Yes, that's the way I read it:  if there already is a system that complies
with NFPA 72 by using 120 VAC smoke alarms, it's perfectly okay to use only
one system smoke if that's all the owner wants.  That also applies to older
homes that have 120 VAC smoke alarms in the hallways, but not in the
bedrooms.

This is mentioned in the appendix to NFPA 72, section A11.3.2, which says
in part:

"Though a combination (of 120VAC smoke alarms and system smoke detectors)
is allowed, one type of equipment must independently meet the requirements
of the Code."

However, if a house has old battery-powered smokes, that is not a compliant
system, and I would say you would have to install enough system smokes to
meet current code requirements, not just one at the top of the stairs.

It does go on to say:  "Similarly, if a monitored household fire alarm
system is added to a house that has compliant multiple-station smoke
alarms, monitored smoke detectors should be installed to replace the
multiple-station alarms or be installed to provide the same required
coverage."

However, the appendix is not part of the code, and besides, it says
"should," not "shall." :-)

- badenov