334.10 (2) and (3) and annex E for building determination types. Here is what the 2005 Handbook commentary has -
A well- established means of codifying fire protection and fire safety requirements i to classify buildings by types of construction, based on materials used for the structural elements and degree of fire resistance afforded by each element. The five fundamental construction types used by the model building codes are Type 1 (fire resistive), Type II (non combustible), Type III (combination of combustible and noncombustible), Type IV (heavy timber), and Type V (wood frame). Types I and II require all structural elements to be noncombustible, whereas Types III, IV, and V allow some or all or all of the structural elements to be combustable (wood).
The selection of building construction types is regulated by the building code, based on the occupancy, height, and area of the building. The local code official or the architect for a building project can be consulted to determine the minimum allowable 9permitted) construction type under construction. When a building of a selected height (in feet of stories above grade) and area is permitted to be built of combustable material (i.e. Types III, IV, or V), the installation of nonmetallic sheathed cable is permitted). The common areas (corridors) and incidental and subordiante (laundry rooms, lounge rooms, etc.) that serve a multifamily dwelling occupancy are are also considered part of the multifamily occupancy, thereby allowing the use of nonmetallic-sheathed cable in those areas.
If a building is to be of noncombustable construction (i.e. Type I or II)by the owner's choice, even though the building code would permit combustable construction, the building is allowed to be wired with nonmetallic-sheathed cable. In such an instance, nonmetallic cable may be installed in the non combustable building because the code would have permitted the building to be of combustable material. Annes E provides charts and other explanatory information to assistthe user in understanding and catagorizing the exact types of constructionunder consideration. A table to cross referencebuilding types to the various building code types of constructionis also provided in Annes E.
In other words, if you interpet correctly out of Annex E great, if not, ask the AHJ.
Is that clear as mud?
