No living room wall switches, these. The first depiction is the opening of a 400,000 volt 3 phase circuit, while it is still delivering it's electric power. I would have loved a job designing stuff like this, but wound up only doing "hobby" work. Note after the arcs extinguish in the first scene, there is a workman casually walking away, his truck parked pretty close! @Hal Pollner How much current is flowing would you say, when that first one opens? Frank (turn up volume!)