Hi ,imagine a situation , we have a large tesla coil, a faraday cage , a man in it and he cage is grounded. Now we switch on the coil high frequency high voltage currents makes a breakdown of air and produces a path so that the current goes and strikes the cage.Now according to faradays law the charge resides on the outside of the cage so does the electric field and the current goes along the outside to ground. The man inside the cage is okay, as the electric field strength inside the cage is zero and no current flows there. Now we take an good enough insulator for the given tesla coil voltage and we insulate the cage from ground , then we attach a wire to the cage from the inside put a mechanical switch in series with that wire and then we let the wire through the cage so that it doesn't electrically touch it to the ground and ground it. Now we switch the coil on , the current goes to the cage once again but it has no path to go to ground this time , so it probably seeks other places with less resistance , now the man stands inside , he flips the switch on the wire so that it forms a path to ground , what happens? Is the electric field inside the cage still zero? If yes then how can current flow through that wire to ground and if it does what happens to the man standing inside the cage , both if he touches the wire (considering the wire isn't insulated) and if he doesn't touch the wire.?