Grounding boxes in home wiring are totally safe for you?

[Jester]

Dang that must be some serious grounding there to use as a conductor.

I am guessing the one line operation is for backup or maintenance. Since id imagine sending DC trough the ground rods would not make them happy in the long term. The lucky side would have some nice corrosion protection from the DC current while the other side gets eaten away by corrosion at an accelerated rate.

Yes they use ground when doing maintenance. They also do a lot of live line maintenance as well where they fly the crew up on a helicopter, hover next to the line, briefly connect the helicopter to the live line, then the lineman hooks himself on the 500kV line. The helicopter then flys away while they do the work. Not sure if it’s true or not but the lineman claimed they got bonus pay for premature aging on top of their live line work bonus.

https://www.facebook.com/ManitobaHydro/videos/maintaining-live-transmission-lines-by-helicopter/226216302785748/