I need to tie some wires into the buss bars of a gear. I have a 15.5 kv switch that powers a transformer that then powers the gear I need to work on. The 15.5 kv switch has 3 positions: open, closed, and ground. Do I need to ground this switch in order to safely work on the gear, or can I just put the switch to the "open" position? Is the "ground" position of the switch for bleeding residual voltage? If not, what is the "ground" position for? Thank you in advance.