Additional thought:
Interior side of an outside block wall IMHO is dry, under normal conditions.
Any wiring 'within'/'inside' basement walls in direct contact with earth, by definition is a wet location. Wiring methods on the interior surface should comply with dry locations; or in some instances possibly 'damp locations' due to condensation moisture.
As to a 'free standing' masonry wall, that's a 'judgement' call. George said block is not mentioned in the NEC. Reading ('08) wet locations, I now have to differ with him. 'Block' is IMHO opinion understood to be made of masonry/concrete.
Sorry George, I now only agree with you in one thread.
