I understand Romex (NM) can be used inside wall cavities, etc. and can be exposed in the crawl attic area. My electrical box is inside the garage which also has a partial dummy ceiling which is used for small storage. Can I run the Romex from the attic into the garage ceiling and down the stud of the un-drywalled wall to the breaker box (behind the water heater which is next to the box)? Can the Romex be visible in the garage?