Visible notification appliances shall be installed within 15 feet of the end of the corridor with a separation of no greater than 100 feet.

Visible notification appliances shall be installed within 15 feet of the end of the corridor with a separation of no greater than 100 feet.

• A. 15 feet from the end; 100 feet apart
• B. 10 feet from the end; 50 feet apart
• C. 20 feet from the end; 80 feet apart
• D. 25 feet from the end; 120 feet apart

Answer: (A)

Visible notification devices in corridors are placed to ensure every occupant can quickly see the alarm signal, even when sightlines are limited by turns and doors. To achieve reliable coverage, a device must be within 15 feet of the end of the corridor so the far end is within sightline, and devices should be spaced no more than 100 feet apart to prevent gaps in visibility along the length of the corridor. The option that satisfies both conditions—15 feet from the end and 100 feet apart—provides continuous, recognizable coverage for people moving through the corridor. If a pattern places the end-device further than 15 feet from the terminus or spaces devices beyond 100 feet, portions of the corridor could lack a visible cue.

Visible notification devices in corridors are placed to ensure every occupant can quickly see the alarm signal, even when sightlines are limited by turns and doors. To achieve reliable coverage, a device must be within 15 feet of the end of the corridor so the far end is within sightline, and devices should be spaced no more than 100 feet apart to prevent gaps in visibility along the length of the corridor. The option that satisfies both conditions—15 feet from the end and 100 feet apart—provides continuous, recognizable coverage for people moving through the corridor. If a pattern places the end-device further than 15 feet from the terminus or spaces devices beyond 100 feet, portions of the corridor could lack a visible cue.