Re: Firestop For Plastic Electrical Boxes
I've only seen fire caulking required where the box is installed in a fire-rated wall, such as the wall between the garage and house. I think plastic boxes may be permitted when properly caulked.
Carlon (a maker of plastic electrical boxes and other devices) has an interesting white paper regarding the fire safety of PVC electrical conduit & raceways. They assert that a plastic device may provide greater protection than a metal one.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.