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#54701 - 08/04/05 11:22 PM 12V vs 24V Fire Alarm  
cgw  Offline
Member
Joined: Jul 2004
Posts: 133
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 01:51 PM Re: 12V vs 24V Fire Alarm  
Ron  Offline
Member
Joined: Mar 2002
Posts: 582
White Plains, NY
I'm not aware of any major manufacturer of fire alarm systems that use 12V.


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#54703 - 08/05/05 06:34 PM Re: 12V vs 24V Fire Alarm  
luckyshadow  Offline
Member
Joined: Jan 2005
Posts: 305
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 07:52 PM Re: 12V vs 24V Fire Alarm  
JCooper  Offline
Member
Joined: Dec 2002
Posts: 228
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 08:07 PM Re: 12V vs 24V Fire Alarm  
LK  Offline
Member
Joined: Jan 2003
Posts: 1,429
New Jersey
24V system will allow a greater selection of devices, and also allow more devices on each zone.



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