Strapping Requirments for Plenum Cable

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ITO

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I failed an inspection today, the inspector said that NEC requires strapping of plenum run cable every 18".

After pouring over the 2008 and 2011, I could not find anything on this, and have never had to do this before.

Has anyone else heard of this?
 
Yes, I am already doing that. I am believe he is mistaken about his comments but I need to not rub his nose in it.
 
ITO said:
I failed an inspection today, the inspector said that NEC requires strapping of plenum run cable every 18".

After pouring over the 2008 and 2011, I could not find anything on this, and have never had to do this before.

Has anyone else heard of this?
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No, its BS unless there is a local amendment. I have heard of zip ties being required to be plenum rated, make sure you get that right though.
 
I don't know of any requirement for supporting LV cables in the NEC other than "workman like manner" and "building fabric". If the cable is something like a hybrid style cable, like an AC or MC based fire alarm cable, then the appropriate article could be referenced, otherwise it's nowhere in the NEC.

I would ask the AHJ what section or article he was referencing for your failure, assuming your cabling is supported by building structure.
 
he may be pulling something out of context. see section 760.130(B)(1), the last sentence says "Where located with in 7 feet of the floor, cables shall be securly fastened in an apporoved manner at intervals of not more than 18 inches." its out of context to just flaty apply it to all installs. the requirement only falls into this specific situation as discussed in the paragraph. we find the same sentence in 760.53 (A)(1). specifically,securing and supporting cables is in 300.4, and 300.11
 
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