Building Design Fire Code Fire Power Distribution Code Standards
Building Design Fire Code of Fire Power Distribution Standards? In recent years. Due to the high temperature in the summer, fires occur in many places. Below I have carefully organized for you building design fire code fire power distribution specification standards, welcome to read, I hope to help you~
The following buildings, tanks (areas) and yards of fire power should be supplied with electricity according to the first class load: (the first class load power supply back-up, line back-up)
1 building height Greater than 50m B, C class plant and C class warehouse;
2 a high-rise civil buildings.
The following buildings, storage tanks (areas) and yards of fire fighting electricity should be supplied by the secondary load: (secondary load power supply does not require backup, line backup)
1 outdoor fire fighting water consumption is greater than 30L / s of the plant (warehouse);
2 outdoor fire fighting water consumption is greater than 35L / s of combustible materials yards, combustible gases storage tanks (areas) and liquid A, B Storage tanks (areas);
3 grain warehouses and grain silos;
4 two types of high-rise civil buildings;
5 seats more than 1500 movie theaters, theaters, stadiums with more than 3,000 seats, any floor area of more than 3,000m2 stores and exhibition buildings, provincial (municipal) level and above, broadcasting and television, telecommunications and trade and financial buildings, the amount of outdoor water for firefighting is more than 25L/s. The water consumption of more than 25Ls of combustible materials, combustible gases, and A and B liquids, and the amount of water for firefighting is more than 35Ls of water. Outdoor fire water consumption is greater than 25L/s of other public **** building.
In addition to the "Building Design and Fire Prevention Code," Article 10.1.1 and 10.1.2 of the buildings, storage tanks (areas) and yards, etc., the electricity for firefighting, can be supplied at the third level of load.
Buildings supplied with electricity for firefighting under primary and secondary loads, when self-contained power generating equipment is used as a back-up power source, the self-contained power generating equipment shall be equipped with automatic and manual starting devices. When the automatic start mode is adopted, the power supply should be guaranteed within 30s.
Different levels of load power supply should be consistent with the current national standard "Power Supply and Distribution System Design Code" GB 50052.
(Non-fire load dual power supply in the short term (generally 20min) can close the gate can be used to manually switch, reliable and economical.)
(Three-level fire load does not require automatic switching at the end, generally is a power supply a circuit can be, such as outdoor fire fighting water is not greater than 25L / s.)
(Residential neighborhoods within the domestic water pumping room, regional domestic water pumping room, not less than the second level of load power supply.)
Building fire emergency lighting and lighted evacuation indicator signs of the backup power supply continuous power supply time should be in accordance with the following provisions: (evacuation lighting time to increase)
1 building height of more than 100m civil buildings, should not be less than 1.5h; (based on the refuge floor into the refuge floor is not necessarily safe to consider, the conditions as far as possible to run out of the Building)
2 medical buildings, buildings for the elderly, the total floor area of more than 100000m2 of public **** building and the total floor area of more than 20000 m2 of the underground, semi-underground buildings, should not be less than 1.0h;
3 other buildings, should not be less than 0.5h.
(general fire emergency lighting and lighting evacuation signs with batteries) The quality of domestic batteries is estimated to ensure that three years, which also has a battery attenuation and other issues, so generally in accordance with the 3 times the capacity of the battery, such as the need for 0.5h time, equipped with batteries for at least 1.5h time to do so. For building height greater than 100m civil buildings, the specification requirement is not less than 1.5h. It is recommended that the front end or add dual power supply or EPS it. There are Chai Fa when the battery pack can be considered as double, only a transition.)
(Escape to meet the visual evacuation path, low smoke concentration on the evacuation channel, low smoke temperature, so under the condition of meeting the time requirements of fire emergency lighting and lighted evacuation signs should also meet the latter two requirements, which requires us to smoke exhaust fans, exhaust fans and other equipment power supply time and reliability can also meet the fire emergency lighting and lighted evacuation signs requirements.)
Firefighting power equipment should use a dedicated power supply circuit, when the building's production and living electricity is cut off, it should still be able to ensure that firefighting power.
(The fire department calls for the separation of fire loads and non-fire loads from the substation. Put out the fire quickly and accurately cut non-. Because like some relatively old buildings, cut non-control module may be faulty failure, fire cut non-signal although issued, but non-firefighting equipment may not be cut off. Fire with rising temperatures, non-fire fighting equipment cable insulation deterioration, coupled with fire fighting spray water and other factors may occur ground faults, and the usual practice of the secondary side of the transformer is only a master switch, a long time may make this master switch tripped, resulting in fire fighting equipment power outage. So from the firefighter's point of view, it is hoped that fire loads and non-fire loads are controlled by two switches. Load is not grouped design program, fire load reliability by non-fire load impact; load grouping design program, wiring is more complex, the investment is larger).
Standby fire-fighting power supply time and capacity, should meet the requirements of the building fire continuation time of the fire-fighting power equipment.
1, commercial buildings, exhibition buildings, complex buildings, a class of buildings. Finance and trade and financial buildings, libraries, bookstores, important archives building, scientific research buildings and high-level hotel fire pumps fire duration of 3h; other high-rise buildings for 2h.
2, used for fire shutter curtain water curtain pumps fire duration of 3h; fire elevators should be greater than the fire pumps, water curtain pumps fire duration of time;
3, pressurized fan, smoke exhaust Machine should be greater than the evacuation time of 30min.
4, sprinkler pumps 1h. (from the substation out only with fire loads, dedicated power supply circuit, awareness should not be biased, such as fire pumps and sprinkler pumps can be shared with a circuit) (twelve-storey residential to set up a fire elevator, generally 8KW, 4mm2 conductor directly from the distribution room lead, from the technically irrational, can be shared with other fire loads, switching
Fire distribution trunk line should be divided by fire partition , fire distribution branch line should not cross the fire partition.
The power supply of fire control room, fire pump room, smoke and smoke exhaust fan room of fire fighting equipment and fire elevator, etc., should be set up in the distribution line of the last level of the distribution box at the automatic switching device.
(Requirements for the power supply of fire-fighting equipment at the end of the distribution box switching, not control box switching. Can be radiated from a distribution box to a number of control box power supply, control box and then to the equipment power supply, do not need each control box are equipped with dual power transfer switch. It is said that the civil regulations will be placed in the dual power distribution box location to be fixed, such as fire control room, fire pump room, fire elevator room, fire protection sub-district of the distribution of small rooms, because the distribution box is far from the fire fighting equipment, or a single-loop power supply, not very reliable, you can look at the provisions of the civil regulations.)
According to one or two loads powered by fire equipment, its distribution box should be set up independently; according to three loads powered by fire equipment, its distribution box is appropriate (to a small number of small engineering emergency lighting openings) set up independently.
Fire distribution equipment should be clearly marked.
Fire distribution lines should meet the need for continuous power supply in case of fire, and its laying should comply with the following provisions:
1 open laying (including laying in the ceiling), should be through the metal conduit or closed metal groove box protection, the metal conduit or closed metal groove box should be protected from fire; when the use of fire-retardant or fire-resistant cable and Laying in cable wells, ditches (building internal cable wells and ditches), may not wear metal conduit or closed metal groove box protection; when the use of mineral-insulated non-combustible (not only refers to the magnesium oxide cable (750 degrees, 3 hours), as well as flexible mineral-insulated cables, magnesium oxide and mica, copper, aluminum, stainless steel with a sheath) cables, can be directly laid;
(flame-retardant, automatic fire alarm system alarm buses, evacuation lighting concealed) cable;
(flame-retardant, fire alarm system alarm buses, evacuation lighting concealed) (fire-retardant, automatic fire alarm system alarm bus, evacuation lighting concealed)
(fireproof paint, fireproof paint three years on the failure)
2 dark laying, should be threaded through the pipe and should be laid in a non-combustible structure and the thickness of the protective layer should not be less than 30mm;
(dark laying, the distribution line through the metal conduit and laid in the structure of the thickness of the protective layer of 30mm or more, is to take into account that the laying of this kind of The way is safer, more economical, and tests show that this laying can ensure that the line continues to supply power in a fire, so the code makes relevant provisions for the thickness of the dark laying).
3 fire distribution lines and other distribution lines should be laid separately in different cable wells, ditches; there are difficulties to be laid in the same cable wells, ditches, should be arranged on both sides of the cable wells, ditches, and fire distribution lines should be mineral-insulated non-combustible cable. (New article, the electrical shaft fire, ordinary cable fire fire to the fire line cable burned)
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