I have a 200 A main panel fed from an underground feed through 2" PVC.
There is a cold breeze coming through the PVC in the main panel between the (3) 3/0 copper feed cables.
What's the best way to stop this breeze from making its way through the PVC ? I was thinking about spraying some "good stuff" expandable foam between the cables, but thoughts I'd check here to make sure there isn't an issue with compatibility to the insulation.
I do realize that if I touch any main lugs, it would not make for a good day having this much unfused power flowing through my body.