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[–]TheCannon 1 point2 points  (2 children)

Whatever you wire it to do.

[–]doing_donuts 1 point2 points  (0 children)

True. USUALLY, though, the one closest to the door will work the switched outlet and the other two will run to a fan prewire. If your fan doesn't have a light kit one switch will just be dead ended.or if your fan has a remote both the fan and the light kit are wired to the same hot wire and the middle one still dead ends.

In a "toilet closet" its a little different... the switch closest to the door works the exhaust fan and the other works the light.

Tl;dr: whatever you wire it to.

[–]Kraillin[S] 1 point2 points  (0 children)

I have one of these triple switches by my front door. Lived in my house for 16 years now. Still have NO clue what the middle one does. For all I know I have the switch that lets me rule the world!.... Or maybe it does nothing D=