One could also look inside the boxes and in most cases it will have lettering that will say "2 HR W C". In that case it would be suitable for a 2 hour rating in a wall or ceiling. I would qualify my statment by saying that is what I typically see in a non-metalic box used for NM cable. There would possibly be other ratings for other boxes.
typo's
![[Linked Image]](https://www.electrical-contractor.net/ubb/smile.gif)
[This message has been edited by George Little (edited 06-07-2006).]
