3 way switch at stairways.

[Matthew Barnicle]

Can anyone quote me the NEC code regarding 3 way switch at the top and bottom of stairs. Is there any limitation on that, such as 3 or more risers, etc?

[Matthew Barnicle]

I think I got my answer.

(c) Where one or more lighting outlet(s) are installed for interior stairways, there shall be a wall switch at each floor level, and landing level that includes an entry way, to control the lighting outlet(s) where the stairway between floor levels has six risers or more.

[Jerry Peck]

Yep, you got it.