Re: "The power lead approached the PC..."
Had the same issue... made it part of our installation process/checklist to set the switch to 230V and apply a dollop of hot glue in the now vacant cavity on the 115V side to prevent moving the switch back easily.
Still could be done by poking the glue out with a small screwdriver if ever needed but as that took several minutes to do no idiot ever tried.
Biting the hand that feeds IT
