Which type of fire alarm system requires additional power supply for the signaling devices?

In fire alarm systems, signaling devices such as horns, strobes, and bells need sufficient power to operate effectively. Conventional fire alarm systems require additional power supplies to ensure that these signaling devices can function without relying solely on the control panel. This is due to the wiring configuration and the way power is distributed within the system.

Conventional systems typically use a distributed wiring layout, meaning that each device may draw power from the panel but can also require supplemental power, especially in larger installations or when multiple devices are activated simultaneously. If the power demand exceeds what the panel can provide, an external power supply is necessary to support the signaling devices.

In contrast, addressable systems have more sophisticated ways of managing power and communication, allowing them to generally utilize the power provided by the control panel more efficiently. Class A systems, which include a looped wiring configuration for redundancy, also manage power distribution differently and may not require additional supplies in the same manner. Independent systems are standalone units that function autonomously and typically do not involve the same concerns regarding signaling device power needs as larger, interconnected setups.

Understanding these distinctions helps clarify why a conventional system is associated with the need for additional power supplies to ensure reliable operation of its signaling devices.