I recently had a distribution rep give me a one on one class. We focused on the technical side of things. We spent a good bit of time on figuring voltage drop, do's and dont's, correct install procedures, etc. There are a few things that I forgot to ask until he left. I had a question about drive-ways and sidewalks. How exactly do you cross sidewalks and driveways? If you install the transformer in the garage, what is the best way to safely get everything outside. We talked about boring/drilling through an exterior wall, is that correct? If so, what's the safest way to do this and what do you seal it with? (Caulk, expanding foam, etc)? Thanks in advance.