2 out of 3 switch guard

thingiverse

Light switch guard designed for two out of three switches found on a standard UK switch faceplate. The design includes holes that allow users to still operate the "locked" switches using a pen or skewer, while preventing accidental switching. This component is held in place by the same screw used to secure the faceplate, eliminating the need for additional parts. I use one of these guards on my garage door security lights to prevent accidental shut-offs.