Several years ago our IAEI lunch group had a guy from (USG?) who explained a lot about fire rated assemblies. I think everyone should see that show. The main lesson we took away is that squirting red caulk around a penetration does not make a fire wall whole again. These things are all assemblies that must be built or modified in the compliant way. There is a book and a web site that describes the various assemblies that comprise a penetration seal.
Bryan probably has more on this. He probably got the guy for us
