jar546
Forum Coordinator
The code reads:
18.3.1 Listing.
All notification appliances installed in conformity with Chapter 18 shall be listed for the purpose for which they are used.
What it means is:
The listing of notification appliances must be use-specific. That is, the listing of an appliance must relate to the way it will be used. This requirement correlates with the requirements of 10.3.1 and 10.3.2, which also require fire alarm system components to be installed in accordance with the manufacturers’ published instructions. These instructions are considered by the listing organization. For example, visual notification appliances listed for wall mounting are not permitted to be installed on a ceiling (or horizontally suspended below the ceiling) because they are designed, tested, and listed for a specific vertical orientation to cover a specific area. If such appliances are mounted horizontally, such as on a ceiling, they will produce inadequate coverage. Appliances listed for ceiling mounting would be required for that application. Visual appliances listed for ceiling mounting can be suspended from the ceiling as permitted by 18.5.5.7.6.
18.3.1 Listing.
All notification appliances installed in conformity with Chapter 18 shall be listed for the purpose for which they are used.
What it means is:
The listing of notification appliances must be use-specific. That is, the listing of an appliance must relate to the way it will be used. This requirement correlates with the requirements of 10.3.1 and 10.3.2, which also require fire alarm system components to be installed in accordance with the manufacturers’ published instructions. These instructions are considered by the listing organization. For example, visual notification appliances listed for wall mounting are not permitted to be installed on a ceiling (or horizontally suspended below the ceiling) because they are designed, tested, and listed for a specific vertical orientation to cover a specific area. If such appliances are mounted horizontally, such as on a ceiling, they will produce inadequate coverage. Appliances listed for ceiling mounting would be required for that application. Visual appliances listed for ceiling mounting can be suspended from the ceiling as permitted by 18.5.5.7.6.