I had the backbone (all wiring from road to the box of the building, including about 1/2 of the boxes) of my farm rewired to the 10 buildings with underground last summer by long-time electricians. Inspector came while I was doing stuff, but I tagged along. He inspected 4 outbuildings, the main box at the transformer, and the house.
I had cattle, including my bull, grazing around 3 of my outbuildings with temp fencing, so I know for pretty darn sure he never went near those buildings.....
--->Paul