I must admit that, as a data geek, we often forget things, however, the school I am in (MATC, Madison, Wisconsin) has as part of it's CCNA/Networking Degree program a course that has a week on fire-stopping, etc. Covers cable penetrations and conduit penetrations. Also includes a brief note on the firestops used in wood homes. One of the main things my prof drilled into our heads? When in doubt, ask. I'm not saying that makes us kings of fire ratings, but it at least makes us note them.