What is the distribution standard of fire power supply in Code for Fire Protection Design of Buildings? In recent years. Due to the high temperature in summer, fires broke out in many places. The following is my elaborate code for fire protection in architectural design. Welcome to read, I hope it will help you ~

The following buildings, storage tanks (areas) and storage yards are powered by the first-class load: (the first-class load power supply is standby, and the lines are standby).

1 Class B and C workshops and Class C warehouses with a building height greater than 50m;

A kind of high-rise civil building.

The fire power supply of the following buildings, storage tanks (areas) and storage yards shall be supplied according to the secondary load: (the secondary load power supply does not need to be reserved, and the lines are reserved).

1 workshop (warehouse) with outdoor fire water consumption greater than 30L/s;

2. Combustible material yards, flammable gas storage tanks (areas) and Class A and B liquid storage tanks (areas) with outdoor fire water consumption greater than 35L/s;

3. Grain warehouses and silos;

4. Class II high-rise civil buildings;

/kloc-cinemas and theaters with more than 0/500 seats, gymnasiums with more than 3,000 seats, shops and exhibition buildings with a building area of more than 3000m2, radio and television, telecommunications, finance and trade buildings at or above the provincial (city) level, and other public buildings with outdoor fire water consumption of more than 25l/s.

Except for Article 10. 1. 1 0. 10. 1.2 of the Code for Fire Protection Design of Buildings, the fire power consumption of buildings, storage tanks (areas) and storage yards can be supplied according to the three-level load.

In buildings where the fire power supply is supplied by primary and secondary loads, when the self-contained power generation equipment is used as the backup power supply, the self-contained power generation equipment should be equipped with automatic and manual starting devices. When the automatic start mode is adopted, the power supply shall be guaranteed within 30s.

The power supply of different grades of loads shall conform to the current national standard "Code for Design of Power Supply and Distribution Systems" GB 50052.

(Non-fire load dual power supply can be connected in a short time (generally 20min) and can be switched manually, which is reliable and economical. )

(Three-level fire-fighting load does not require automatic switching at the end. Generally, one power supply and one loop are enough. For example, the outdoor fire water consumption does not exceed 25L/s ...)

(The domestic water pump house in residential area and the regional domestic water pump house are not less than the secondary load for power supply. )

The continuous power supply time of standby power supply for fire emergency lighting and light evacuation indication signs in buildings shall meet the following requirements: (Increase the evacuation lighting time)

1 Civil buildings with a building height greater than 100m should not be less than1.5h; (Because it is not necessarily safe to enter the refuge floor, try to run out of the building if possible. )

2 Medical buildings, old-age buildings, public buildings and underground and semi-underground buildings with a total construction area of more than 100000m2 should not be less than1.0h;

3 other buildings should not be less than 0.5h

(Generally, fire emergency lighting and light evacuation instructions come standard with batteries, so the quality of domestic batteries is estimated to be guaranteed for three years, and there are also problems such as battery attenuation. So batteries are usually equipped with three times the capacity. If 0.5h is required, at least 1.5h is required. For civil buildings with a building height greater than 100m, the specification requires no less than1.5h. It is recommended to add dual power supplies or EPS to the front end. When there is firewood, the battery pack can be considered as double, and only one transition is made. )

(When you escape, you need to meet the visual evacuation path, low smoke concentration and low smoke temperature on the evacuation passage, so you should also meet the latter two requirements while meeting the time requirements of fire emergency lighting and light evacuation signs, which requires us to meet the requirements of fire emergency lighting and light evacuation signs for power supply time and reliability of smoke exhaust fans, exhaust fans and other equipment. )

Fire electrical equipment should use special power supply lines, and when the production and living electricity in the building is cut off, it should still be able to ensure fire electricity.

(The fire brigade requires that the fire-fighting load of the substation be separated from the non-fire-fighting load. Put out the fire quickly and accurately. Because, like some old buildings, non-fire protection modules may fail. Although the non-fire fighting signal is sent out during the fire, the non-fire fighting equipment may not be cut off. In case of fire, with the increase of temperature, the insulation layer of non-fire equipment cable deteriorates, and grounding fault may occur due to fire extinguishing, water spraying and other factors. There is only one main switch on the secondary side of the transformer, which may trip for a long time, resulting in power failure of the fire fighting equipment. Therefore, from the fireman's point of view, it is hoped that the fire-fighting load and non-fire-fighting load will be controlled by two switches. The loads are not grouped, so the reliability of fire fighting loads is greatly affected by non-fire fighting loads; The load grouping design scheme has complex wiring and large investment. )

The power supply time and capacity of standby fire-fighting power supply shall meet the requirements of all fire-fighting electrical equipment during building fire.

1, commercial buildings, exhibition buildings, comprehensive buildings, first-class buildings, finance and trade buildings, libraries, stacks, important archives buildings, scientific research buildings, high-class hotels, and the continuous running time of fire pumps is 3h; Other high-rise buildings are 2h.

2. In case of fire, the continuous running time of water curtain pump for fire shutter is 3h; Fire elevator should be longer than the continuous running time of fire pump and water curtain pump in case of fire;

3. The evacuation time of the pressurized fan and fume exhauster should be greater than 30min.

4. Spray pump1h. (coming out of the substation, you only need fire load and special power supply circuit, don't go to extremes. For example, the fire pump and the spray pump can share a loop. A fire elevator should be set up in a twelve-story house. Generally, 8KW and 4mm2 wires are led directly from the distribution room, which is technically unreasonable and can be shared with other fire fighting loads, and radiated after switching).

Fire protection distribution trunk lines should be divided into fire protection zones, and fire protection distribution branch lines should not cross the fire protection zones.

The fire control room, fire water pump room, fire-fighting electrical equipment in smoke control and exhaust fan room and the power supply of fire elevators shall be equipped with automatic switching devices at the last distribution box of their distribution lines.

(The power supply of fire fighting equipment requires switching at the terminal distribution box, not at the control box. A distribution box can radiate power to multiple control boxes, and then the control boxes supply power to the equipment, so that each control box does not need to be equipped with a dual power switch. It is said that the civil engineering regulations will fix the location of the dual-power distribution box, such as the fire control room, fire pump room, fire elevator room and various distribution cabinets in the fire protection area, because the distribution box is still single-circuit power supply if it is far from the fire protection equipment, which is not very reliable. Then you can look at the civil regulations. )

According to the primary and secondary load power supply of fire fighting equipment, its distribution box should be set independently; According to the three-level load of fire-fighting equipment, its distribution box should be set independently (a small number of emergency lighting openings for small projects).

Fire power distribution equipment should be clearly marked.

Fire power distribution lines shall meet the needs of continuous power supply in case of fire, and their laying shall meet the following requirements:

1 exposed (including laying in the ceiling) shall be protected by metal conduit or closed metal trough box, and fire prevention measures shall be taken for metal conduit or closed metal trough box; When flame-retardant or fire-resistant cables are laid in cable shafts and cable trenches (cable shafts and cable trenches in buildings), it is not necessary to wear metal conduits or use closed metal trunking boxes for protection; When using mineral insulated non-combustible cables (not only magnesium oxide cables (750 degrees, 3 hours), but also flexible mineral insulated cables, magnesium oxide and mica, copper, aluminum and stainless steel with sheaths), they can be directly exposed;

(Fire retardant, alarm bus of automatic fire alarm system, hidden application of evacuation lighting)

(Fire-retardant coatings and fire-retardant paints will expire within three years)

2 dark apply, should wear a tube and should be laid in incombustible structure, the protective layer thickness should not be less than 30 mm.

(When laying in the dark, the distribution line is laid in a structure with a protective layer thickness greater than 30 mm. Considering that this laying method is relatively safe and economical, and the test shows that this laying method can ensure the line to continue to supply power in the fire, the code has made relevant provisions on the thickness when laying in the dark. )

3 Fire power distribution lines should be laid separately from other distribution lines in different cable shafts and cable trenches; If it is really difficult to lay the same cable shaft and trench, it should be laid on both sides of the cable shaft and trench respectively, and the fire-fighting distribution line should use mineral insulated non-combustible cables. (New clause: Fire broke out in the electrical shaft, ordinary cables caught fire, and the fire-fighting line cables were burned. )

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