NM in commercial drop ceilings

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betsy

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We are doing a job in which drop ceilings will be installed in a commercial building. Now I understand the code as saying that NM can not be used in OPEN RUNS. But above the drop ceiling are 2x12 trusses in which I was hoping to bore through and run the NM through with out violating code requirements. Has anyone done this and is it legel or should I stick to MC cable the whole way? By the way I was going to only use the NM for my feeder cables then branch off using a J box with MC cable to feed my lights.
Thanks!
 
Re: NM in commercial drop ceilings

334.12 (2) Uses not permitted seems clear to me. So I say no. There is an amendment in the Massachusetts code though.

Good luck romeo
 
Re: NM in commercial drop ceilings

If you can see it, it is an open run.
Don

corrected typo

[ January 11, 2006, 09:14 PM: Message edited by: don_resqcapt19 ]
 
Re: NM in commercial drop ceilings

Originally posted by websparky:
Not to mention...never drill or alter a truss! It is a building code violation.
Click to expand...
Is it a tgi truss then there isn`t a problem with holes.
 
Re: NM in commercial drop ceilings

Would it comply with 334.10(3)(provide a thermal barrier of material that has at least a 15-minute finish rating as identified in listings of fire-rated assemblies)
 
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