【 Weak current College 】 emergency broadcast design requirements

⑴ fire radio speaker settings should meet the following requirements:
Emergency broadcast speaker settings? in the corridors, halls, restaurants and other public places, the number should be able to guarantee any part from the floor to the most recent one speaker in walking distance of no more than 25 meters. The intersection in the aisle, the corner should set speakers. Sidewalk ends last cry out from the wall is not more than 12 metres. Each speaker rated power should not be less than 3w.
? In-room speakers power should not be less than 1w.
Estate located in the air conditioning room, ventilation room, a laundry, a civic space and parking, and other background noise at the speaker, in its broadcast range of playback sound pressure level should be higher than background noise identification 15db, speaker of power.
⑵ fire broadcasting should not be greater than 100v voltage feeder. Each floor of the feeder isolation voltage regulator to ensure that when any of the tap has a fault, should not affect other tap of a normal radio.
⑶ fire broadcasting output branch should be evacuated sequence control, playback evacuation instructions floor control procedures are as follows:
? N-tier and n-tier or above the floors of a fire, you should connect the fire floor is adjacent to and below.
? The first floor there is a fire, you should reach this layer, layer 2 and underground floors.
? The basement there is a fire, you should connect the underground floors and first floor.
⑷ fire broadcasting and service broadcasting or operational radio combination, should meet the following requirements:
Fire should be can't fire control room will fire evacuation floor speakers and amplifier forced to fire the broadcasting State.
? Fire control rooms should be able to monitor fire radio power amplifier for operation.
Set within the guest room bedside Cabinet building speakers, should have the fire broadcasting function.
If fire broadcasting and service broadcasting or operational radio and speaker with volume switch, the system should be used in third-line wiring cables forced open the fire so broadcasts.