How should sirens typically be wired?

Wiring sirens in parallel is the optimal choice because this configuration allows each siren to operate independently. When sirens are wired in parallel, each unit receives the same voltage from the power source, ensuring consistent performance across all devices. If one siren fails or is disconnected for maintenance, the others will continue to function without interruption, maintaining the overall integrity of the system.

In contrast, wiring sirens in series would mean that they share the same current path. If one siren fails, the entire circuit could be disrupted, causing all sirens to go silent. This makes series wiring unsuitable for emergency alarms where reliability is essential. While transformers and backup batteries can serve specific purposes in alarm systems or power management, they are not the standard method for wiring multiple sirens in a consistent and reliable manner.