NM - Romex where can it be used???

[Sparky5150]

Does anyone have experience interpreting Article 334-10,12?

Is there a rule of thumb regarding what type buildings romex is permitted?

I'm currently working on a 4 story condo project with 45 units consrtucted with concrete structure.

Any help would be apprieciated!

 

[raider1]

Annex E of the 2005 NEC gives you some information on the different building types, it may be of some help to you in understanding the different types of building construction. Annex E is for informational purposes only and not adopted as code.

Chris

 

[bphgravity]

Annex E references the NFPA 220. Most jurisdications and states have adopted the International codes or a version of it which details construction types in Chapter 6 of the IBC for example. Just be aware that ICC terminology and classification does not exactly match that from the NFPA.

A project of the size and scope mentioned in your post will likely have this classification detailed...

 

[don_resqcapt19]

Also you have to remember that the use of NM is not based on the actual construction type of the building, but of the construction type that is permitted by the building code. If the building code only required Type I or II construction, but for some reason the building was build using Type IV construction, you could still use NM.
Don

 

[LarryFine]

Where does one find out what the construction types mean? In other words, what defines each type?

 

[eprice]

Larry,

If the IBC is the adopted building code, construction types are discussed in chapter 6. They are generaly defined by two things: 1) whether or not combustible materials are allowed to be used for structural elements, and 2) what is the fire-resistance rating (in hours) of the various building elements (roofs, floors, walls, beams, trusses, columns, etc.)

 

[e57]

You should also check your local codes as well, many around here differ on 'uses-permited' for NM.