ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

Topic Options
Rate This Topic
#128152 - 08/03/02 05:18 AM Metal Ceiling Boxes
johngeorge Offline
Member
Registered: 09/08/01
Posts: 26
Plastic ceiling boxes in fire rated ceilings have to be spaced certain distances apart depending on the manufactured product. What about metal ceiling boxes? I have never seen any restrictions on their installations. Looked all over, called UL, no one semms to know - but I'm sure its out there someplace.
Top
Tools for Electricians:
#128153 - 08/03/02 09:02 AM Re: Metal Ceiling Boxes
jes Offline
Member
Registered: 07/12/02
Posts: 103
Loc: CT
I believe you need to refer to the UL listing book that deals with fire rated assemblies (I'm sorry I cannot recall the proper title now and I'm not in my office). That is where the info is on the permitted penetrations for each rated assembly. You may be able to get some of the info on their website but I think for a specific assembly (construction and fire resistance time)you will have to go to the actual listing.
Top
#128154 - 08/04/02 04:49 AM Re: Metal Ceiling Boxes
johngeorge Offline
Member
Registered: 09/08/01
Posts: 26
I have looked through the UL fire resistance directories and they contain ceiling penetrations for recessed and fluoresent lighting but no surface mounted fixtures that would require fixture boxes. The general descriptions in the front of Vol 1 cover metal wall boxes but not ceiling metal boxes.
Top

Member Spotlight
Member Since: 12/24/00
Posts: 4259
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
0 registered (), 55 Guests and 12 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
Scotto, Freecrowder, clee512, Jdscott2005, FAIZAN

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals