Re: fire alarm devices
Unfortunately, doing fire alarm work is not always as clear cut as we'd like it to be. You're usually at the mercy of the AHJ (as others have pointed out)and if he/she wants one in the break room........you'll put one in "just because" they want one there.
But, if you want some really good opinions on this I suggest you log onto the AFAA website and join in their fire alarm discussion group. There are many really sharp individuals that are extremely knowledgeable on NFPA 72 and will set you in the right direction.