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#96542 - 12/05/05 08:39 PM Lightbulb Clearance  
shortcircuit  Offline
Member
Joined: Jun 2004
Posts: 608
massachusetts
Is there a code requirement for the distance that a incandescent type A-lamp would be required to maintain from combustible surfaces such as wood?

For instance, if a 60watt A-lamp, screwed into a keyless lampholder in a basement of a dwelling, was within an inch of a wooden rafter, this would seem to be a hazard.

410.5 gives me some guidance, but is there any other clear guideline that would specify distances from combustible material for type A-lamps?

shortcircuit


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#96543 - 12/05/05 09:35 PM Re: Lightbulb Clearance  
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
Depends on the bulb used...do you have a thermocouple handy?

If I remember correctly, industry standards set 140 degrees F as the maximum temperature a fixture can cause on a "flamable" surface.


#96544 - 12/05/05 10:17 PM Re: Lightbulb Clearance  
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
"within an inch of a wooden rafter, this would seem to be a hazard." - Yep....bulb to the side or below, I think it would be too close.


Mark Heller
"Well - I oughta....." -Jackie Gleason

#96545 - 12/05/05 11:00 PM Re: Lightbulb Clearance  
jwhite  Offline
Member
Joined: Dec 2005
Posts: 64
Trenton, NC, USA
410.5 Luminaires (Fixtures) Near Combustible Material.
Luminaires (fixtures) shall be constructed, installed, or
equipped with shades or guards so that combustible material
is not subjected to temperatures in excess of 90°C
(194°F).



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