Smoke detectors

[trentonchristine]

What is NEC code for how far a smoke detector has to be off the wall ? Trying to keep it 3ft from the fart fan but not to close to the wall



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[Dennis Alwon]

What is NEC code for how far a smoke detector has to be off the wall ? Trying to keep it 3ft from the fart fan but not to close to the wall



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The manufacturers' info will have that data which is supplied inside the box. The NEC is silent on smoke alarms. I assume you mean alarms not detectors.

 

[gadfly56]

This is one of those cases where if you don't read the installation instructions for every product you install, then you could easily get it wrong. One brand smoke detector might require a box and another brand will not.

nhfire77 beat me to it, but I believe the System Sensor 2W-B's are the only detectors out there that allow this. Siemens, Silent Knight, Honeywell, EST, Simplex, Notifier, all require a box for any device.

 

[gadfly56]

110.3(B) Installation and Use. Listed or labeled equipment
shall be installed and used in accordance with any instructions
included in the listing or labeling.

How do you know that the instructions you are reading were "included in the listing or labeling". The mounting shown in the manufacturers instructions may be just what the manufacturer feel's is a good install.

Seriously? You think that a life safety device's installation instructions are optional? The fire alarm component installation instructions are always a part of the listing.

 

[gadfly56]

What is NEC code for how far a smoke detector has to be off the wall ? Trying to keep it 3ft from the fart fan but not to close to the wall



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Won't be NEC but NFPA 72. If 2007 or earlier, it's 4 inches. If 2010 or later it's 0 inches.