I'm doing some remodeling in our basement, and came across the following (see pictures). It looks like the contractor simply wrapped tape around the conduit to secure the box to the wall.
How are exterior boxes usually secured to an exterior wall? What is the "correct" way to prevent weather and/or critters from accessing the hole in the siding? I saw a similar post that mentioned caulking the box to the exterior wall, but is that how it's usually done? Are there any IBC codes that apply in this situation?
Best Answer
The IRC or the NEC doesn't apply here, common sense does. What you need to do is apply a paintable silicone acrylic or silicone caulk to the back of the box and around the entry hole before you screw the box to the wall. There should be holes inside the box or external ears for mounting. The idea is to stop water from going behind the box and around the conduit into the wall. Don't be afraid to use it, you can wipe off the excess with a damp cloth. Good luck.