Fire Alarm Device

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mstrlucky74

Senior Member
Location
NJ
Just curious. Normal install conditions, flush mounted inhung ceiling. A speaker/strobe with backbox and support. How many hours?I say 1.2
A smoke detector with backbox and support?


 

nhfire77

Senior Member
Location
NH
Just curious. Normal install conditions, flush mounted inhung ceiling. A speaker/strobe with backbox and support. How many hours?I say 1.2
A smoke detector with backbox and support?



It will take longer than a smoke. It will be a 4 wire device and could be fed by two separate circuits and probably has a shield that has to be made up and isolated from ground. A smoke could be a 4 wire but most aren't now.
 
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