1) the following building fire point should be powered by a load:
① building height greater than 50m B, C class plant and C class warehouses.
② A high-rise civil buildings.
2) the following buildings, storage tanks (areas) and yards of fire fighting electricity should be powered by the secondary load:
① outdoor fire fighting water consumption is greater than 30L/s plant (warehouse).
② outdoor fire water consumption greater than 35L / s combustible materials yard, combustible gas storage tanks (areas) and A, B liquid storage tanks (areas).
③ Grain warehouses and grain silos.
④ The second category of high-rise civil buildings.
⑤ Cinemas and theaters with a seating capacity of more than 1,500, gymnasiums with a seating capacity of more than 3,000, stores and exhibition buildings with a floor area of more than 3,000m2 on any one level, provincial (municipal) level and above, broadcasting, television, telecommunication, and finance and trade
financial buildings, and other public ****ing buildings with outdoor fire fighting water consumption of more than 25L/s.
3) In addition to articles 1) and 2) of the buildings, storage tanks (areas) and yards, etc., fire-fighting electricity, can be supplied at three levels of load.
4) the fire-fighting power supply according to the first and second level load of the building, when the use of self-powered generation equipment as a backup power supply, self-powered generation equipment should be set up automatically and manually start the device. When the automatic starting method, should be able to ensure that the power supply within 30s.
The power supply for different levels of loads should be in accordance with the provisions of the Code for the Design of Power Supply and Distribution Systems (GB 50052-2009).
5) building fire emergency lighting and lighting evacuation indicator signs of the backup power supply continuous power supply time should be consistent with the following provisions:
① building height greater than 100m civil buildings, should not be less than 1.5h.
② medical buildings, buildings for the elderly, the total floor area of more than 100,000m2 of the public **** building and the total floor area of more than 20000m2 of underground, semi-floor area. 20000m2 underground, semi-underground buildings, should not be less than 1.0h.
③ Other buildings, should not be less than 0.5h.
6) fire electrical equipment should be used in a dedicated power supply circuit, when the building's production and living electricity is cut off, it should still be able to ensure that the fire power.
The power supply time and capacity of the standby fire-fighting power supply shall meet the requirements of the fire-fighting power equipment in the fire continuation time of the building.
7) The fire-fighting power distribution trunk line should be divided according to the fire partition, and the fire-fighting power distribution branch line should not cross the fire partition.
8) fire control room, fire pump room, smoke and smoke exhaust fan room of the fire fighting equipment and fire elevator power supply, should be in the distribution line of the last level of distribution box set up at the automatic switching device.
9) According to the first and second load power supply of fire fighting equipment, its distribution box should be set up independently; according to the third load power supply of fire fighting equipment, its distribution box should be set up independently. Fire fighting distribution equipment should be set up obvious signs.
10) fire distribution lines should meet the needs of continuous power supply in case of fire, the laying of which should comply with the following provisions:
① open laying (including laying in the ceiling), should wear metal conduit or closed metal groove box for protection, metal conduit or closed metal groove box should be taken to protect against fire; when the use of fire-retardant or fire-resistant cables and cable wells and ditches, may not wear a metal conduit or closed metal groove box protection. Metal conduit or closed metal groove box protection; when the use of mineral-insulated non-combustible cable, can be directly laid.
② concealed, should be threaded and should be laid in a non-combustible structure and the thickness of the protective layer should not be less than 30mm.
③ fire distribution lines should be laid separately from other distribution lines in different cable wells, ditches; there are difficulties in laying in the same cable wells, ditches, should be arranged separately in the cable wells, ditches on either side, and the fire distribution lines should be mineral-insulated class non-combustible cable. Cable.