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Old 11-19-2016, 03:24 PM   #1
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Default Smoke Detectors and combustible surfaces?

Just thinking why smoke detectors don't require a box that fully houses the unit?
Is it because the splice should be made in box? I guess some surface mount fixtures are even more to blame. ah I need to get back to work!

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Old 11-19-2016, 03:26 PM   #2
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The canopy of a typical wall sconce would have even more exposed wall surface and you are allowed to splice in the canopy.
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Old 11-19-2016, 03:38 PM   #3
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I hope you have that grounded properly zac
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Old 11-19-2016, 03:50 PM   #4
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Quote:
Originally Posted by HackWork View Post
I hope you have that grounded properly zac
Now you got me tripping!

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Old 11-19-2016, 03:56 PM   #5
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The smoke detector needs to be out in the air steam as much as possible, the new ones are much flatter than the original models.

As for the canopy of a fixture the area underneath is said to have limited air for combustion. Something I read a while back in an article.
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Old 11-19-2016, 04:02 PM   #6
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Before the 2014 code most light fixtures installed on combustible surfaces were not compliant

Quote:
Originally Posted by 2011
(B) Exposed CombustibleWall or Ceiling Finish. Where
a luminaire canopy or pan is used, any combustible wall or
ceiling finish exposed between the edge of the canopy or
pan and the outlet box shall be covered with noncombustible
material
The 2014 added a few words at the end

Quote:
(B) Exposed Combustible Wall or Ceiling Finish. Where
a luminaire canopy or pan is used, any combustible wall or
ceiling finish exposed between the edge of the canopy or
pan and the outlet box shall be covered with noncombustible
material if required by 410.23.
Quote:
410.23 Covering of Combustible Material at Outlet
Boxes. Any combustible wall or ceiling finish exposed between
the edge of a luminaire canopy or pan and an outlet
box having a surface area of 1160 mm2 (180 in.2) or more
shall be covered with noncombustible material.
That's a 13x13 box-- Not sure what kind of light that would be
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