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Lightbulb Clearance #96542
12/05/05 08:39 PM
12/05/05 08:39 PM
S
shortcircuit  Offline OP
Member
Joined: Jun 2004
Posts: 609
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

2017 / 2014 NEC & Related Books and Study Guides
Re: Lightbulb Clearance #96543
12/05/05 09:35 PM
12/05/05 09:35 PM
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.

Re: Lightbulb Clearance #96544
12/05/05 10:17 PM
12/05/05 10:17 PM
E
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
Re: Lightbulb Clearance #96545
12/05/05 11:00 PM
12/05/05 11:00 PM
J
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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