In a corridor 20 ft wide or less, visible notification appliances must be spaced no more than what distance?

• A. 50 ft.
• B. 100 ft.
• C. 150 ft.
• D. 200 ft.

Answer: (B)

Visible notification appliances (strobes) must be placed so occupants can see at least one within their line of sight as they move down a corridor. For corridors that are 20 feet wide or less, codes set the maximum spacing at 100 feet. This distance balances keeping strobes within easy view along the length of a narrow corridor while avoiding unnecessary device placement or clutter. Distances like 150 feet or 200 feet would risk sections of the corridor having no visible notification in sight, and 50 feet would be more protective than required, not reflecting the standard maximum for this specific width.