(2) Multifamily dwellings permitted to be of Types III, IV, and V construction. (3) Other structures permitted to be of Types III, IV, and V construction. Cables must be concealed within walls, floors ...
This answer is based on the 2017 NEC. A. Insulated conductors typically used in dry and damp locations include Types THHN, THHW, THWN, or THWN‑2. Other conductor insulations that can be used are Types ...