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24.5.17 Visible Appliances
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Visible notification appliances shall be of a sufficient quantity and intensity and located so as to meet the intent of the design and be in compliance with Section 18.5.
Strobes used in combination systems where the same strobe is used for both mass notification and fire notification shall comply with the following:
- Be clear or nominal white, meeting the listing requirements of ANSI/UL 1971, Standard for Signaling Devices for the Hearing Impaired
- Have no marking or be marked with the word "ALERT" stamped or imprinted on the appliance
- Be visible to the public
In situations where existing notification appliances previously used exclusively for fire alarm applications, and are marked with the word "FIRE," and are to be used for other emergency notification purposes, field modification to the marking shall be permitted, provided that it is accomplished by one of the following methods:
- Replacement of the manufacturer's approved escutcheon or trim plate
- Covering of, or removal of, the word "FIRE" using a manufacturer's approved method
- Installation of a permanent sign directly adjacent or below the notification appliance indicating that it is multipurpose and will operate for fire and other emergency conditions
Strobes with colored lenses shall be marked with the listed effective intensity using the lens color installed.
Where strobes are used solely for mass notification, the word "ALERT" shall be stamped or imprinted on the appliance and be visible to the public.
Where colored strobes are used solely for mass notification, they shall be listed to an applicable standard such as ANSI/UL 1638, Visual Signaling Appliances — Private Mode Emergency and General Utility Signaling.
Strobes used for mass notification shall meet the synchronization requirements of Section 18.5.
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