What works with mineral cables? Are there any mineral insulated fire cables in the basement?
At present, most large engineering projects need to use mineral cables, or fire acceptance will not pass.
1. According to the fire protection design code of civil construction, mineral cables are required for underground construction projects, including mining, underground transportation, municipal, industrial and hydraulic construction projects, such as mines and tunnels, underground railways, underground warehouses and oil depots, as well as water conveyance for various purposes and other hydraulic tunnels.
What works with mineral cables? Are there any mineral insulated fire cables in the basement?
2. Super-high-rise basement fire fighting equipment must use mineral insulated cable, otherwise it may fail to pass the fire fighting acceptance. Underground building cable selection requirements:
A. Cables should be used to avoid mechanical, vibration, chemical, underground current, water corrosion, heat, bee, ant and rat damage.
B. Set an alarm device. Since there is no one on duty in the underground building and there are few patrols, it is necessary to install the self-alarm and fire control system.
C. due to the limited underground space, there is no spare space for laying large fireproof cable tray, so it is necessary to choose clear application or directly buried fireproof cable.
D. there is a lot of water in the air in the underground building. Water is a conductive substance. If the insulation material used in the electrical equipment absorbs water internally, it will reduce the insulation performance and produce "leakage" phenomenon, which is easy to cause inflammable and combustible nearby. Accordingly, when choosing electric wire and cable, should use jacket protection moistureproof, mildew proof the mineral insulation cable with good performance.
What works with mineral cables? Are there any mineral insulated fire cables in the basement?
3. Specification for parking cable selection of underground buildings: according to relevant national documents and regulations, emergency lighting, communication equipment power supply, fire fan and fire power in underground parking lots are relatively important loads, so they can be divided into primary loads. General lighting and other three loads. Therefore, two power lines should be selected, and the two power sources are drawn from different distribution stations respectively, in case one distribution station loses power due to maintenance and other reasons, the parking lot electrical equipment can get electricity from the other distribution station, so as to ensure the normal operation of the equipment. Choose mineral insulated cable in the case of fault or fire can normally maintain a period of power, and mineral insulated cable later basically do not need how to maintain, with long service life, high mechanical strength, stable electrical performance and other characteristics.