As you can see, placing a small metal bracket over the switch can prevent any accidental changes. Best of all, with the screws in such a location, it’s possible to avoid drilling into your walls. This small metal bracket could be the difference between an expensive electrical repair and a practical solution. Have a light switch that has to stay on or off, and it is always getting bumped? [Imgur]

Keeping a Permanent Switch in the Right Position - 87