Good Grief, what could have been! We were noticing some flickering in our work lights and the AC units were working kind of funcky. Noticing that some lights were OK and others not, I figured "maybe we've lost a phase". Since we moved into and renovated this old bus garage 13 years ago, we never had cause to open the main input switch box. I mean, who wants to get cozy to 3 phase 400 amps? So I opened it and found this!! Someone had flattened the ends of some conduit and put it in place of fuses. And you'll notice I was able to open the panel without turning everything off because the switch blades only went part way into their slots so the lock wasn't engaged. What mind thinks that was an OK thing to do?