Stairway Lighting Control Requirements

How many risers separate floor levels to control stairway lighting?

a. 5 risers
b. 8 risers
c. 10 risers
d. 12 risers

Final answer:

Answer:

In electrical engineering or building regulation, a wall switch is required at each level when there are 6 or more steps, which translates to 5 risers separating the floor levels.

Explanation: The requirements for stairway lighting control is a topic in the field of electrical engineering or building code regulation. To answer your question, a wall switch is required at each level when there are 6 or more steps, which translates to 5 risers separating the floor levels. The rule originates from the National Electric Code (NEC) NEC 210.70(A)(2)(c) that states: "For stairways, installed lighting fixtures controlled by a switch located at each floor level where the stairway between floor levels has six risers or more." So the correct answer to your question would be option a) 5 risers.