Article 410.16(C)

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lcunit81

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when installing 2-foot by 4-foot fluorescent lay-in luminaires in suspended ceilings, how many corners of any one of the luminaires require an independent support wire to support it?
 
I think that depends on your jurisdition. It is not an NEC requirement. Its a building code issue. But most areas around here lets us catty corner most lights. And correct me if I am wrong but I think it doesnt apply to a light under 5 pounds.
 
tonyou812 said:
I think that depends on your jurisdition. It is not an NEC requirement. Its a building code issue. But most areas around here lets us catty corner most lights. And correct me if I am wrong but I think it doesnt apply to a light under 5 pounds.
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I'm not correcting you :)D) because I don't know your jurisdiction, but we support everything - exit signs, receptacles and all.

As far as 2' x 4's, some places are opposite corners, some require all 4 corners.
 
I agree it is a building code issue.
I am not a building codes expert. I have read through 3 of the building code documents for NYS, and I could not find the requirement for fixtures in suspended/drop ceilings to be supported to the structure.
The City of White Plains NY has a MRLS that states the fixtures in suspended/drop ceilings have to be supported to the structure. This lends some credibility to my search that it is not a State Code requirement in NYS.
 
In Mass any fixture with a ballast must be supported directly to the building structure. Chain attatched at diagonal corners does the job.

Not in the building code, it is a code amendment to the NEC.
 
Pierre C Belarge said:
I agree it is a building code issue.
I am not a building codes expert. I have read through 3 of the building code documents for NYS, and I could not find the requirement for fixtures in suspended/drop ceilings to be supported to the structure.
The City of White Plains NY has a MRLS that states the fixtures in suspended/drop ceilings have to be supported to the structure. This lends some credibility to my search that it is not a State Code requirement in NYS.
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I don't know if this is what you're looking for, but, the 96 NEC was amended for '99 at 410-16(c) to require that clips used to secure the fixture to the ceiling framing members were to be listed. This was done so that they would have to meet the minimum performance criteria as per NRTL's. :smile:
 
wbalsam1 said:
I don't know if this is what you're looking for, but, the 96 NEC was amended for '99 at 410-16(c) to require that clips used to secure the fixture to the ceiling framing members were to be listed. This was done so that they would have to meet the minimum performance criteria as per NRTL's. :smile:
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Fred
You are just the person who may be able to help me.

I have myself spent countless hours looking through the Building, Fire and Mechanical codes of NYS (2007 versions). I could not find a reference in regards to supporting fixtures to the building structure for suspended/drop type ceilings.

Would you/could you, if you have the time, be able to help me? I would like someone like yourself, who has a lot of experience with NYS codes to assist me in my search. Maybe you know someone in the state who is willing to help.

Thanks
Pierre
 
Pierre C Belarge said:
Fred
You are just the person who may be able to help me.

I have myself spent countless hours looking through the Building, Fire and Mechanical codes of NYS (2007 versions). I could not find a reference in regards to supporting fixtures to the building structure for suspended/drop type ceilings.

Would you/could you, if you have the time, be able to help me? I would like someone like yourself, who has a lot of experience with NYS codes to assist me in my search. Maybe you know someone in the state who is willing to help.

Thanks
Pierre
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I just casually looked through the list of referenced standards within the Building Code at Chapter 35 and didn't readily find a lighting standard. I would imagine that the way to get to it would be like this:
  • Enter the BCNYS at 103.1 Approved Materials and Equipment. Material approved by testing labs, etc....
  • See 103.5 on Workmanship and installation in accordance with listing.
  • Chapter 27 refers to Chapter 35 and the NFPA 70, 2005
  • Enter 2005 NEC at 410.16(C)
  • Refer to 110.3(B)
  • Find appropriate (UL?) standard or at least the Manufacturer's installation instructions and any listing by a NRTL that would be included with the clips, rivets, etc,.
  • Install/Inspect as per listing.
When I'm in Albany again, I'll try to remember to have a go at this. :smile:
 
Pierre C Belarge said:
Scott
That is a state wide code?
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Yep, here it is.

410.36(B) Add a second paragraph as follows:

In addtion to, or in lieu of, the mechanical fastening means, electric luminaires containing ballasts, other than simple fluorescent reactance ballasts, shall be supported directly to the building structure by wire, chain, or threaded rod of sufficient strength to carry the luminaire. Fluorescent luminaires shall be supported at each end of a diagonla axis of the luminaire.
 
electricmanscott said:
Yep, here it is.

410.36(B) Add a second paragraph as follows:

In addtion to, or in lieu of, the mechanical fastening means, electric luminaires containing ballasts, other than simple fluorescent reactance ballasts, shall be supported directly to the building structure by wire, chain, or threaded rod of sufficient strength to carry the luminaire. Fluorescent luminaires shall be supported at each end of a diagonla axis of the luminaire.
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Nice. I like. :smile:
 
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