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#54701 - 08/04/05 08:22 PM 12V vs 24V Fire Alarm
cgw Offline

Registered: 07/29/04
Posts: 133
Loc: Rochester NY
Can someone give me the practical difference(s) between 12V and 24V fire alarm systems?

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#54702 - 08/05/05 10:51 AM Re: 12V vs 24V Fire Alarm
Ron Offline

Registered: 03/13/02
Posts: 577
Loc: White Plains, NY
I'm not aware of any major manufacturer of fire alarm systems that use 12V.

#54703 - 08/05/05 03:34 PM Re: 12V vs 24V Fire Alarm
luckyshadow Offline

Registered: 01/04/05
Posts: 305
Loc: Maryland USA
I've never seen a 12 volt system. I have only dealt with two voltages on F/A.
Did repair work on an "old school" 120 volt system and install lots of 24 volt.

#54704 - 08/05/05 04:52 PM Re: 12V vs 24V Fire Alarm
JCooper Offline

Registered: 12/30/02
Posts: 229
Loc: Kendall Park, NJ USA
I don't think I have ever seen a true fire panel with 12vdc output, most of the time a 12vdc panel is a residential burg panel with a fire zone. It is a bit easier to get parts for a 24vdc system, there are very few companies that make a 12vdc horn/strobe, System Sensor is the only one that I can think of off the top of my head. It is also easier to get 24vdc smokes. Is this a residential or commercial installation?

#54705 - 08/05/05 05:07 PM Re: 12V vs 24V Fire Alarm
LK Offline


Registered: 01/21/03
Posts: 1721
Loc: New Jersey
24V system will allow a greater selection of devices, and also allow more devices on each zone.


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