Do you know the power distribution specifications for fire smoke exhaust fans?

Fire smoke exhaust fans are a measure to promptly exhaust smoke after a fire occurs in a building. They are of great significance to people's survival and safety. However, the power distribution of fire smoke exhaust fans often does not meet the requirements. Next, let me learn its power distribution specifications together. 1. The power supply and distribution of fire smoke exhaust fans cannot meet the load level requirements of high-rise civil buildings. Some power supply lines are not connected to fire detectors, but to floor lighting distribution boxes. Some designs use single-circuit power distribution lines, and some designs do not have terminal power automatic switching devices, and they all fail to meet the first and second levels. Dedicated dual circuits required for power supply loads. Requirements for the installation of terminal automatic switching devices.
Second, the installation of exposed distribution lines does not meet the requirements. Some fire smoke exhaust fan power distribution lines pass through plastic pipes, and some wear metal pipes that are not coated with fire retardant paint, which does not meet the fire protection performance requirements of the pipes.
In the smoke-proof stairwells and front rooms of high-rise civil buildings, the front rooms of fire elevators or shared front rooms, the exterior windows above the podium can be opened for natural smoke exhaust. The podium part does not have natural smoke exhaust conditions. At that time, the front room or shared front room was not equipped with a positive pressure air supply system as required by the regulations.
For an inner walkway without natural smoke exhaust, some designers believe that it has the conditions for natural smoke exhaust due to the natural smoke exhaust in the front room of the smoke-proof stairwell connected to it, and do not install mechanical smoke exhaust as required by the specification. facility.
The above is the knowledge introduced to you about the power distribution specifications of fire smoke exhaust fans. For our own safety, we should be more standardized to avoid personal injury to us.
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