What is the purpose of end-of-line testing in fire alarm systems?

End-of-line testing in fire alarm systems serves the essential purpose of verifying circuit functionality and the operation of devices. When a fire alarm system is installed, it's crucial to ensure that all components, such as detectors, pull stations, and notification devices, are properly communicating and functioning as intended. The end-of-line test helps confirm that the system responds appropriately to alarm signals and that each device is correctly connected to the circuit.

During this testing phase, a resistor or test device is placed at the end of each circuit, allowing technicians to determine if the circuit is complete and capable of detecting faults such as short circuits or open circuits. The functionality of alarm devices, including their activation in response to simulated conditions, can be evaluated as part of this process. This step is vital to ensure the reliability of the fire alarm system, which is critical for ensuring the safety of occupants and property in the event of a fire.

The focus on verifying circuit functionality underlines the importance of a well-tested fire alarm system, ensuring that it will operate efficiently when needed most.