A _____________ device shall be permitted for more than one appliance when installed in accordance with the system's listing.

A _____________ device shall be permitted for more than one appliance when installed in accordance with the system's listing.

• A. Common alarm device
• B. Single listed detection
• C. Shared detection panel
• D. Multi-appliance control unit

Answer: (B)

Understanding how listing governs shared detection is key. A detection device is allowed to cover more than one appliance only if the system’s listing specifies that it can do so. When a device is described as single listed for this application, the listing confirms it may monitor multiple appliances, provided it’s installed exactly as the listing requires. This is what permits using one detector to serve more than one appliance, reducing the number of devices while still meeting the listing’s requirements. If a detector isn’t covered by the listing for shared use, you must not rely on it to protect multiple appliances, because the listing limits how and where the device can be used. The other options don’t address the specific permission granted by the listing to share a detector across appliances; they refer to different device types or configurations that don’t establish that shared-use allowance.

Understanding how listing governs shared detection is key. A detection device is allowed to cover more than one appliance only if the system’s listing specifies that it can do so. When a device is described as single listed for this application, the listing confirms it may monitor multiple appliances, provided it’s installed exactly as the listing requires. This is what permits using one detector to serve more than one appliance, reducing the number of devices while still meeting the listing’s requirements.

If a detector isn’t covered by the listing for shared use, you must not rely on it to protect multiple appliances, because the listing limits how and where the device can be used. The other options don’t address the specific permission granted by the listing to share a detector across appliances; they refer to different device types or configurations that don’t establish that shared-use allowance.