Which rule pertains to the installation of fire alarm devices regarding ambient conditions?

The rule that pertains to the installation of fire alarm devices regarding ambient conditions states that equipment must not be located where conditions exceed the manufacturer's recommendations. This is important because fire alarm devices are designed and tested under specific environmental conditions defined by the manufacturer. Exceeding these conditions—whether they relate to temperature, humidity, or other factors—could impair the functionality and reliability of the devices.

Fire alarm systems must ensure that they operate effectively in the environment in which they are installed; otherwise, the risk of malfunction or failure increases, which could jeopardize safety. This is why adherence to manufacturer's specifications is critical in the installation process. Proper placement according to these guidelines helps ensure that the fire alarm system remains operational and effective in a real emergency.