What type of fire alarm method activates all devices in response to a fire?

The method that activates all devices in response to a fire is known as the general fire alarm method. This approach ensures that when a fire is detected, every device in the system responds simultaneously to alert occupants and initiate a prompt evacuation. This is crucial in larger buildings or facilities where the risk of smoke or fire spreading quickly can jeopardize safety.

General fire alarm systems are designed for comprehensive coverage, ensuring that everyone in the vicinity is made aware of the fire threat without relying on specific activation points. By activating all devices, such as horns, strobes, and other audible or visual alarms, it maximizes the likelihood that individuals will respond appropriately to evacuate the premises and seek safety.

In contrast, selective methods may activate only specific devices based on zone or location, which could delay response time, especially if individuals are located far from the triggered units. Local systems are only focused on alarms within a designated area or room, which can be insufficient in a larger environment. Manual systems depend on human activation, which may introduce delays in alerting occupants. Therefore, the general method is the most effective for widespread, immediate awareness in fire situations.