Protective covers for notification appliances may require ________?

Protective covers for notification appliances may require derating, which refers to the practice of reducing the number of devices that can be connected to a power supply or circuit due to additional power demands. When protective covers are installed, they can impact how sound or light is projected and distributed in an environment, necessitating adjustments to the design and layout of the notification system.

Derating is crucial to ensure that each notification appliance operates effectively and complies with safety standards, particularly when additional barriers may impede their function. This may involve using a greater number of appliances to ensure adequate coverage or adjusting the spacing between devices to maintain optimal performance while factoring in any thermal loading or power consumption changes due to the protective covers.

In this context, other options, such as increasing the power supply, wiring clearance, or enhanced visibility, while potentially relevant considerations, do not directly relate to the specific requirements for notification appliances equipped with protective covers and their operational efficacy in a fire alarm system. Thus, derating, along with any needed adjustments, stands out as the most pertinent requirement in this scenario.