Thread Content
The new standard for fire pumps, GB50116—2013, came into effect on July 1, 2016, and several years have passed since then. During this time, various new issues encountered during the inspection of fire pumps have led to rejections of those pumps. The following 10 changes represent key aspects to consider when inspecting fire pumps. 1. For the host, whether domestic or imported, the total number of probes, buttons, and modules it can have must not exceed 3200; if this limit is exceeded, an additional host is required. 2. Water pumps and fans are not allowed to be started using frequency conversion; they must be started directly in one step, and frequency converters are not permitted to be installed in their control cabinets. 3. For circuits, the maximum number allowed in the code cannot exceed 200; if this limit is exceeded, an additional circuit must be added. Moreover, an isolator should be added to the circuit; one isolator can handle only 32 points. 4. Modules shall not be installed inside high-voltage distribution cabinets (boxes); they should be placed in dedicated module boxes. 5. In a building, no matter how many sound and light alarms there are or how many announcements are made, all of them should be activated in the event of a fire. This ensures that every area and corner is aware of the fire at the same time, allowing for rapid evacuation. 6. The fire pump is connected to a 24V power supply; regardless of the distance, when measured with a multimeter on site, the voltage must not be lower than 22.8V. If it is lower than this value, an additional 24V power supply should be installed on site. 7. For construction workers, when using 24V power cables in the future, they should use fire-resistant copper-core cables, namely those starting with the letter NH, with a cross-sectional area of not less than 1.5 square millimeters. Lower requirements can apply to signal cables, which can be flame-retardant types, those starting with the letter ZR. 8. In case of a fire, ordinary power supply, escalators, sewage pumps, recreational facilities, and kitchen electricity should be cut off immediately ； As for other normal lighting systems, domestic water pumps, security systems, passenger elevators, etc., their power supply should be cut off at a later time or manually and selectively, to facilitate evacuation of people. 9. When the manufacturer establishes the interconnection relationships, one probe should no longer be used to activate the fire pump system; instead, any two probes in that area, or one probe combined with any manual alarm, can be used to initiate its operation. 10. In future residential buildings, independent household alarm systems should be installed at a height of 1.3 to 1.5 meters at the entrance inside each unit; smoke detectors and combustible gas detectors should be installed in bedrooms and kitchens. All of the above are aspects that are particularly emphasized in the new regulations, and they are all items that will be subject to close inspection by the fire pump department during future construction work.