I am trying to rewire my house. I have one red wire that only shows up in a few boxes. What do i do with that?
I can't, in good conscience, recommend or condone NDBoiler's advice. Can't trust those BoilerMakerBoyz.
Over the years I've installed many a dimmer switch in apartments I've inhabited. As a homeowner (since 1983) I've not only come to be known as "The Dimmer Switch King" I've also done my reading on wiring do's and dont's as well as electrical codes. I've wired my garage (built in 1989), parts of my kitchen, bedrooms and basement. Nothing's caught fire (yet), everything works and no one has been electrocuted.
If you're at all close to serious, the red wire denotes, in the parlance, a "three" way switch which actually has two, separate, controlling switch points. The red wire is a pass-through of the "hot" black wire.
If you were just pulling legs ... Eff You, you palmetto bug bastage!!!