I found a switch box containing 2 black wires wire nutted together, 2 red wires nutted together, 2 white wires wire nutted together. This box was covered with wallpaper and when stripping the room I found this box. There is one ground wire connected to the metal switch box.The black and white wires are hot, the red not.

The box is being used as a junction box. Was probably a 3 way switch at on time.

Chuck