In corridors with visible notification appliances, how many are required to flash in sync?

In corridors equipped with visible notification appliances, the requirement is for all appliances to flash in synchronization. This is to ensure that the visual alerts are effective for individuals who may be visually impaired or those who need clear and direct guidance during an emergency. Having more than two appliances flashing in sync improves visibility and can help prevent confusion, as consistent signaling is crucial in high-stress situations where rapid response is necessary.

When multiple appliances flash simultaneously, it creates a stronger signal that is more readily noticed. This synchronized flashing can guide occupants towards exits and provide a clear indication of the emergency, thus enhancing the overall effectiveness of the fire alarm system. Consistency in signaling is vital, making it essential to have more than two appliances flash in unison in the corridor to meet safety standards and ensure safety compliance.