Q1: How to deal with the inconsistency between the requirements of Article 3.3.8 and 3.2 of GB51309 and Article 10.1.6 of GB50016-2014?  

   

Chen Zhongli: Generally speaking, basic standards (the so-called "parent standards") set general principles, and specific standards and project standards set specific rules. Basic standards have a wide coverage and wide application, so it is inevitable that  there will be omissions and  discomfort in the face of specific projects.

 

 Therefore, in addition to major  principled provisions, specific technical rules can be implemented according to special standards and project standards. From the point of view of this question, if GB50016 does not clearly stipulate, it should be implemented according to GB51309.  

   

 

  

Q2: Can a public building without an automatic fire alarm system use its own power supply type B lamps? In addition, some small projects do not need to be equipped with a fire alarm system.

 According to the specification, "residential buildings without fire control rooms, evacuation corridors, stairwells and other places can choose to bring their own power supply B-type lamps", then whether this kind of small project is only a centralized The power supply is enough, no need to set up the controller? 

 

Chen Zhongli: If the installation height of the lamps exceeds 8 meters, it is ok, otherwise, type A should be used. Residential can.   

 

     

 

Q3: Contents of Article 3.6.5-2 of GB51309-2018: All non-continuous lighting lamps in the centralized control system under non-fire conditions should be kept off, and the light sources of continuous lighting lamps should be kept in a power-saving lighting mode.

Can it be understood that the fire emergency lighting in the building using the centralized control system fire emergency lighting and the evacuation indication system cannot be used for daily lighting, that is, the emergency lighting cannot use human body induction or sound and light control lamps?

 

Chen Zhongli: "Can it be understood that the fire emergency lighting in the building that adopts the centralized control system's fire emergency lighting and evacuation indication system cannot be used for daily lighting, that is, the emergency lighting cannot use human body induction or sound and light control lamps?" Before and after are not a concept. In the first question, the specification does not prohibit the use of emergency lighting and general lighting lamps, but the selection of shared lamps and lanterns must meet the requirements of emergency lighting; the latter question, emergency lighting should not use human body induction or sound and light control lamps, because fire may hinder evacuation

 

   

 

 

Q4: GB51309 is laid through pipes, can B1 grade rigid plastic pipes be used? 

 

Chen Zhongli: It can be used if it is concealed in the non-combustible body and the thickness of the protective layer is not less  than 3cm, otherwise it will not work. 

 

 

 

Q5: 3.2.9.3 of GB 51309-2018 is a problem with the setting position of the direction indicator lights that maintain visual continuity. Is it only the floor of the passageway of the commercial business hall, and does it include the corridor area? (For commercial projects, from the business hall to the stair evacuation exit through the corridor, whether the corridor needs to be set). The shops on both sides of the pedestrian street are evacuated by the logistics corridor. Is it necessary to add direction signs to maintain visual continuity on the ground of the logistics corridor?

 

Chen Zhongli: Visually continuous ground direction signs are suitable for tall spaces. When there are solid walls on both sides of the corridor, the evacuation direction indicator lamps installed along the walls can be used, and floor lamps are not suitable.

 

 

 

 

Q6: In the national standard atlas for emergency lighting of stadiums, type B lamps can be used, and they can also be used as safety lighting for the venue. The illuminance is required to be 20lx. Can the venue lighting lamps be used for this part of the function, and whether it must be set up for special purpose If it can be used for both, how can the emergency lighting controller be linked with the venue lighting control?

 

Chen Zhongli: It can be used both, but the lamps must meet the requirements of emergency lighting lamps. The emergency lighting controller shall realize logical control with the site lighting control cabinet, and shall have priority in case of fire.

 

 

 

 

Q7: In 3.2.1.6 of GB51309, the specification and selection of marking lights, for places with an indoor height greater than 4.5 meters, extra-large or large marking lights should be selected. Only for high mounted marker lights? In a building where only emergency lighting is a secondary load, can the storage battery of the centralized power source be regarded as the secondary power source?

 

Chen Zhongli: Extra-large or large sign lights are only for high-mounted sign lights. Only buildings with secondary load for emergency lighting can regard the battery of the centralized power supply as the second power source, but the precondition is that the power supply time of the battery pack meets the requirements.

 

 

 

 

Q8: Can the standby lighting described in other specifications except GB 50016 and GB51309 be understood as non-fire standby lighting? That is, to cut off the power supply in a fire alarm state?

 

Chen Zhongli: Emergency lighting in other specifications may also include fire-fighting backup lighting, which cannot be generalized.

 

 

 

 

Q9: There are relevant regulations on the operating time of emergency lighting under non-fire conditions in the technical standards and specifications of fire emergency lighting and evacuation indication systems. Is the battery power supply time of the system considered based on non-fire power supply time and fire power supply time?

 

Chen Zhongli: The power supply time stipulated in the specification refers to the exclusive power supply time for fire protection. If the lamp is also lit at ordinary times, the battery should also add power consumption at ordinary times.

 

 

 

 

Q10: Type B lamps can be used in houses without fire control rooms in the specification. How do you understand them? High-rise residential areas are all a fire control room in a certain building. How is this article implemented?

 

Chen Zhongli: Choose A-type lamps.

 

 

 

 

Q11: Excuse me, does the input end of the centralized power supply use a non-fire-fighting mains power supply?

 

Chen Zhongli: No, fire-fighting equipment must be powered by a dedicated circuit.

 

 

 

 

Q12: In a large space (without fire control room and alarm system), there are both A-type lamps and B-type lamps, and A-type distribution boxes have been set up. For B-type lamps, special B-type lamps must be set up. Is it the electric box, can the B-type lamps be directly connected to the ordinary box?

 

Chen Zhongli: Type B lamps must be equipped with a special distribution box for type B lamps, and powered by a special circuit for fire protection.

 

 

 

 

Q13: The specification requires that the standby lighting takes electricity from one channel to normal lighting, and the other channel is used for emergency lighting. Does the standby lighting need to be set up with an independent distribution box? Is it possible to draw power from the emergency lighting box?

 

Chen Zhongli: If it is a fire-fighting backup lighting, of course, take the power from the emergency lighting box; if not, obviously not.

 

 

 

 

Q14: GB 51309-2018 "Technical Standard for Fire Emergency Lighting and Evacuation Indication System" stipulates that the continuous working time of emergency lighting backup power supply is 0.5h, 1.0h, 1.5h, and the backup time and initial installation capacity for use in non-fire conditions should also be considered Is it feasible to configure the battery capacity by 3 times the continuous working time? When there is a diesel generator set for power supply, how to configure the battery capacity? When the main power supply for emergency lighting is restored (after the engine is started), is it switched to the main power supply? If switching to mains power supply, does the battery power supply time only consider the power supply during engine start?

 

Chen Zhongli: This is also a question repeatedly discussed by the GB51309 preparation team. 1) As long as the installation space is large enough, the capacity and power supply time of the battery pack are not a problem, of course, the rationality problem must be considered. 2) If all emergency lighting lines except the terminal branch lines are compliant fire-resistant cables, and you can ensure that the generator set starts 100% automatically in the event of a fire, the battery pack only needs to solve the power supply needs of the generator set during the transition process of starting. Otherwise it won't work.

 

 

 

 

Q15: Which one has a higher safety level, self-contained power supply or centralized power supply, and is more recommended to use?

 

Chen Zhongli: Each has its advantages and disadvantages, and its reliability cannot be generalized. Generally speaking, centralized power supply (including distributed centralized power supply) emergency lighting system is more suitable for large and extra-large buildings, as well as high space such as stadiums.

 

 

 

 

Q16: A high-rise building used to be a non-centralized emergency system. Now, several floors are being renovated. The emergency lighting is implemented according to the new standard. Do you need to add a new system or use the old system?

 

Chen Zhongli: I do not know the specific situation of the project, so it is difficult to judge. Consultation with the local fire department is recommended.

 

 

 

 

Q17: Smoke-proof stairwells should be set up with separate power distribution circuits and 3.3.7.2 Smoke-proof stairwells should be set with independent emergency lighting distribution boxes. Can the emergency lighting distribution boxes only have one loop?

 

Chen Zhongli: An independent emergency lighting distribution box should be set up in the smoke-proof stairwell, and the number of circuits depends on the number of floors.

 

 

 

 

Q18: What kind of battery does the controller use, can lead-acid batteries be used? If lead-acid batteries are used, there is a conflict with the specification.

 

Chen Zhongli: The battery selection of the controller should be carried out according to the product standard.

 

 

 

 

Q19: Is GB51309 suitable for integrated pipe gallery projects?

 

Chen Zhongli: Applicable, some aspects can refer to the relevant provisions of the tunnel.

 

 

 

 

Q20: The power supply for the emergency lighting in the pump room is taken from the power distribution cabinet of the generator and has its own battery. Do you need to set up the emergency lighting power supply?

 

Chen Zhongli: The fire-fighting standby lighting in the pump room needs to be powered by the normal power supply and emergency standby power supply, and cannot be powered by the generator power distribution cabinet only.