Fire-protective signaling systems installed in homes use circuits that are limited by what?

Fire-protective signaling systems, such as smoke detectors and alarm systems, utilize circuits that must adhere to specific limitations to ensure their effective and safe operation. The correct answer indicates that these circuits are limited by the listed power supply for the system. This is significant because every fire signaling system is designed to function optimally within a certain voltage and current range as specified by its manufacturer.

Using a supply that exceeds these specifications could lead to malfunctions or even pose safety hazards, such as fire risks. The listed power supply ensures that the components of the fire signaling system operate as intended, maintaining the reliability and effectiveness of the alarm.

Understanding this limitation is crucial for compliance with safety regulations and maintaining the integrity of fire safety systems in residential settings, ensuring they can perform their life-saving roles during emergencies.