How long is the emergency emergency power supply for emergency lighting suitable?
First, the specification requirements
Many specifications relate to the continuous power supply of emergency lighting. The following two main specifications are introduced, representing the fire protection industry and the construction industry.
(1) "Code for Design of Building Fire Protection"
Article 10.1.5 of the Code for Building Fire Protection Design GB 50016-2014 stipulates that the continuous power supply time of the standby power supply for fire emergency lighting and light evacuation indication signs in buildings shall meet the following requirements:
1 The civil building with a building height greater than 100m shall not be less than 1.5h;
2 Medical buildings, elderly buildings, public buildings with a total construction area of ​​more than 100,000 m2, should not be less than 1.0 h;
3 Other buildings should not be less than 0.5h.
[Explanation] For the convenience of use, the requirements for continuous power supply for emergency lighting are shown in Table 1.
Table 1 Continuous power supply time for emergency lighting specified in GB 50016
(II) "Code for Electrical Design of Civil Buildings" JGJ 16 -2008
Article 13.8.6 of JGJ 16-2008 stipulates that the minimum continuous power supply time and minimum illumination of standby lighting and evacuation lighting shall comply with the requirements of Table 2.
Table 2 Fire emergency lighting minimum continuous power supply time, illuminance table
The provisions of Article 13.8.3 of this specification mentioned in the table are as follows: For the following parts of public buildings and residential buildings, evacuation lighting shall be provided:
1 Evacuation stairwells in public buildings (including the front room of the smoke-proof stairwell), evacuation passages, fire elevators and their front rooms, and combined front rooms.
2 High-rise public buildings in the audience hall, exhibition hall, multi-purpose hall, restaurant, banquet hall, conference hall, waiting (machine) hall, business hall, office hall and refuge floor (such as).
Second, the normative analysis
The above two are sorted out to give Table 3.
Table 3 Integrated emergency lighting continuous power supply time
It is not difficult to see from Table 3 that the requirements of the two specifications are inconsistent, and some of them are quite different, causing many confusions for users and no choice.
Question 1: What is the meaning of emergency lighting and light evacuation indicators?
From GB 50016, emergency lighting and light evacuation indicators are in a side-by-side relationship;
From the perspective of JGJ 16, the emergency lighting range is large. Article 13.8.1 of the Code stipulates that fire emergency lighting includes standby lighting and evacuation lighting. Therefore, emergency lighting includes evacuation lighting, and the light evacuation indicator is one of evacuation lighting. The definition of emergency lighting for JGJ16 is consistent with the “Design Standard for Architectural Lighting†GB 50034-2013. Article 2.0.1 of GB 50034 defines emergency lighting as lighting that is activated due to power failure of normal lighting. Emergency lighting includes evacuation lighting, safety lighting, and standby lighting. Evacuation illumination is defined as emergency lighting used to ensure that evacuation channels are effectively identified and used. The definitions of emergency lighting for GB 50034 and JGJG 16 are derived from the International Commission on Illumination CIE, and their requirements are basically the same as those in the international arena.
Figure 1 Emergency lighting structure
Question 2: What is fire emergency lighting?
Fire emergency lighting has been proposed many times in GB 50016. The terminology is not defined in the terminology. However, the provisions in the article indicate that fire emergency lighting refers to evacuation lighting and standby lighting in case of fire. It can be understood from the description of the article that fire emergency lighting is a special case in the emergency lighting application scenario. Then the problem arises. When designing, design a fire emergency lighting system and a non-fire emergency lighting system, or just design a set. Shared emergency lighting system? This requires everyone to take it seriously and discuss it!
Third, the conclusion
It is recommended to strengthen communication and coordination between different norms to avoid conflicts and conflicts!
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