Just helped do an installation of a tankless water heater for a customer. My part of it was wiring the heater (it's got electric ignition). It's wired to a switch inside the house. The customer is concerned that the switch could be mistaken for a light switch and turned off, as am I, so I looked for some kind of cover for it with no luck. I was hoping to find something like the little rectangular metal box covers that one sees on furnace switches; you know, the ones that flip up to. The only ones I could find, however, have a switch and a fuse mounted in a duplex box, with the cover over the fuse, not the switch (I don't need a fuse anyhow).
These little covers would be perfect. Are these available anywhere for use with switches? I'm thinking either a cover plate that has the safety cover built into it, or a cover that could be screwed over an exisiting switch plate.
I did find some interesting switch covers on line. These ones
The other alternative that I'm going to use in the meantime are those little plastic tabs you can screw onto a switch to keep it in one position or the other. Also not ideal, since you then need a tool to flip the switch.