I'm putting a subpanel in the outside wall of my attached garage, which I'm also insulating so I can work out there in the winter. I'm wondering what steps are worthwhile to air seal and insulate around the subpanel. The wall is 2x4 framing, so there isn't really any room for insulation behind the box.
- Would it be beneficial to try fitting insulation in the rest of the bay (above/below panel) or should I just focus on air sealing?
- Can/should I use caulk to seal the cable clamp penetrations?
- Should I do something to block airflow through the conduit which will connect the subpanel to the main panel?