[RFI] Apartment complex RFI associated with Fire Alarm Control Panel circuit

Don Kirk wd8dsb at gmail.com
Fri Mar 8 13:30:18 EST 2019

Hi Steve,

Yes, I'm very suspicious of the AC power supply (also wonder if the battery
is OK, but I would think the system would alarm if battery was sick), and
can't wait to see what we find out.  I'm not really sure who the apartment
complex called to notify them that we were working on the system and alarms
needed to be ignored during that time period.  There is definitely a fire
alarm monitoring service (be it a service or central fire department
dispatch), and recall them telling me in early conversations on the phone
that their system communicated via RF to whomever is monitoring the alarms
(be it a service, or the actual fire department dispatch center).

The process of gaining access and information is a very slow one, but we
will figure it out.  I was surprised that the apartment complex "service
supervisor" did not know where the FACP was actually located (not really
sure he did not know, or if he was tired of working with me for the day and
therefore just did not want to tell me).

Don (wd8dsb)

On Fri, Mar 8, 2019 at 1:06 PM Steve Kurtzman <stevew7sjk at gmail.com> wrote:

> Fire alarm panels are required to have battery backup that keeps them
> running normally for 24 hours.  So the noise must be coming from the AC
> power supply itself.
> The entity to notify would be the fire alarm monitoring service, if any.
> They would receive a "trouble" signal when the AC power is turned off.
> Circuit breakers feeding fire alarm control panels are normally required to
> have their handles painted red, but it is rarely done.  The CB handle lock
> is optional but used quite often.
> Steve W7SJK
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