在安装电缆桥架时，需要遵守一系列常见的规范以确保电缆桥架的、稳定及合规性。以下是一些主要的规范要点：

　　When installing cable trays, a series of common specifications need to be followed to ensure the safety, stability, and compliance of the cable trays. Here are some main regulatory points:

　　1、设计与规划：绘制综合管线BIM图，优化管线排布，确定电缆桥架安装位置及标高。根据电缆数量、规格及路由环境选择合适的桥架类型、材质及尺寸。

　　1. Design and Planning: Draw a comprehensive pipeline BIM diagram, optimize pipeline layout, and determine the installation position and elevation of cable trays. Select the appropriate cable tray type, material, and size based on the number, specifications, and routing environment of the cables.

　　2、安装位置与间距：电缆桥架应尽可能在建筑物（如墙、柱、梁、楼板等）上安装，与土建密切配合。电缆桥架与各种管道平行架设时，净间隔不小于500mm；交织时，净间隔不小于300mm。电缆桥架与空调管道平行或交叉时，间隔不小于300mm，并可能需采取隔热防腐措施。敷设10kV及以上电缆的电缆桥架多层安装时，层间距一般不小于300mm。电缆桥架到楼板、梁或其他障碍物的底部间隔不小于300mm。两组电缆桥在同一横梁上安装时，净间隔不小于50mm。

　　2. Installation position and spacing: Cable trays should be installed on buildings (such as walls, columns, beams, floors, etc.) as much as possible, in close coordination with the civil engineering profession. When cable trays are installed parallel to various pipelines, the clear spacing should not be less than 500mm; when interwoven, the clear spacing should not be less than 300mm. When cable trays are installed parallel or intersecting with air conditioning pipelines, the spacing should not be less than 300mm, and insulation and anti-corrosion measures may need to be taken. When installing multiple layers of cable trays for laying 10kV and above cables, the interlayer spacing is generally not less than 300mm. The distance between cable trays and the bottom of floors, beams, or other obstacles is not less than 300mm. When two sets of cable bridges are installed on the same crossbeam, the net spacing is not less than 50mm.

　　3、安装牢固与支撑：电缆桥架应有足够的刚度及强度，对电缆提供可靠的支撑。支架安装应牢固可靠，连接紧固无遗漏。水平安装的支架间距一般为1.5~3m；垂直安装的支架间距不大于2m。吊杆直径不应小于8mm，且需在过梁处设置固定支架。电缆桥架转弯处两边各设一组吊架，且两组吊架对称布置，间距不大于1.5米；否则转弯中间位置需增设一组吊架。

　　3. Installation firmness and support: Cable trays should have sufficient rigidity and strength to provide reliable support for cables. The bracket installation should be firm and reliable, with no missing connections. The spacing between horizontally installed brackets is generally 1.5-3m; the spacing between vertically installed brackets is not more than 2m. The diameter of the suspension rod should not be less than 8mm, and fixed brackets should be installed at the beam crossing point. A set of hangers shall be installed on both sides of the cable tray turning point, and the two sets of hangers shall be symmetrically arranged with a spacing of no more than 1.5 meters; Otherwise, a set of hangers needs to be added in the middle of the turn.

　　4、接地与连接：金属电缆桥架及其支架全长应不少于2处与接地干线相连接；电缆桥架首位两端需与配电柜外壳或地线排可靠连接。非镀锌电缆桥架间连接板的两端跨接铜芯接地线，跨接地线小允许截面积不小于4mm?；镀锌电缆桥架间连接板两端不跨接接地线，但连接板两端应有不少于2个有防松螺帽或防松垫圈的连接固定螺栓。

　　4. Grounding and connection: The metal cable tray and its support should be connected to the grounding main line at no less than 2 points along its entire length; The first two ends of the cable tray should be reliably connected to the outer shell of the distribution cabinet or the grounding wire. The two ends of the connecting plate between non galvanized cable trays shall be bridged with copper core grounding wires, and the minimum allowable cross-sectional area of the bridging grounding wire shall not be less than 4mm?; The connection plate between galvanized cable trays shall not have a grounding wire across both ends, but there shall be no less than 2 connection fixing bolts with anti loosening nuts or anti loosening washers at both ends of the connection plate.

　　5、防火与封堵：电缆桥架穿越墙体、楼板及防火分区时，需做好防火封堵处理，确保电缆桥架在火灾时具有一定的耐火时间。封堵材料应选用不燃或难燃材料，确保封堵效果。

　　5. Fire prevention and sealing: When cable trays pass through walls, floors, and fire compartments, fireproof sealing treatment should be done to ensure that cable trays have a certain fire resistance time in case of a fire. The sealing material should be non combustible or flame-retardant to ensure the sealing effect.

　　6、其他注意事项：电缆桥架安装完成后，应喷涂正确、清晰的标识，便于后续的维护与管理。在特殊环境（如多粉尘、易受机械损伤等场所）下，需采取相应的保护措施，如加装保护罩等。电缆桥架安装时应预留一定的空间，便于电缆的敷设、检修及未来可能的扩展。

　　6. Other precautions: After the installation of cable trays is completed, correct and clear markings should be sprayed to facilitate subsequent maintenance and management. In special environments (such as places with high dust and susceptible to mechanical damage), corresponding protective measures should be taken, such as installing protective covers. When installing cable trays, a certain amount of space should be reserved for cable laying, maintenance, and possible future expansion.

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