1. When the fire power load of the building is level I and the AC power supply is used, the main power supply and emergency power supply should provide dual power supply, and the tree dry or radial power supply should be used. The end dual power supply automatic switching emergency distribution box shall be set up according to the fire zone to provide the standby lighting and evacuation lighting power in the zone.

When the centralized battery or the battery pack attached to the lamp is used, the special circuit provided by the emergency power supply in the dual power supply should adopt the trunk type power supply, and the emergency distribution box should be set according to the fire compartment.

2. When the fire power load is level II and AC power supply is adopted, double circuit trunk power supply should be adopted, and automatic switching emergency distribution box should be set according to the fire compartment. When the centralized battery or the battery pack attached to the lamp is used, it can be powered by the trunk type of single circuit line, and the emergency lighting distribution box shall be set according to the fire compartment.

3. For emergency lighting of high-rise building stairwell, special circuit should be provided by emergency power supply, and trunk type power supply should be adopted. The emergency lighting distribution box should be set according to the specific situation of the project.

4 standby lighting and evacuation lighting should not be powered by the same branch circuit. It is forbidden to connect sockets in the output circuit of emergency lighting power.