锌镁铝电缆桥架安装核心注意事项：做好防腐防护、保证连接牢固接地、适配环境规避损伤，避免影响耐蚀性和使用寿命。

　　Core precautions for the installation of zinc magnesium aluminum cable trays: do a good job of anti-corrosion protection, ensure a firm connection and grounding, adapt to the environment to avoid damage, and avoid affecting corrosion resistance and service life.

　　具体要点：

　　Specific points:

　　1. 防腐保护：安装时避免划伤表面锌镁铝涂层，划伤处需及时补涂专用防腐漆；户外/腐蚀环境中，支架与墙体、桥架连接处需加防腐垫片，沿海/化工区需额外做密封处理（如接缝打防腐胶）。

　　1. Anti corrosion protection: Avoid scratching the surface zinc magnesium aluminum coating during installation, and timely apply special anti-corrosion paint to the scratched area; In outdoor/corrosive environments, anti-corrosion gaskets need to be added to the connections between brackets, walls, and cable trays. In coastal/chemical areas, additional sealing treatment (such as applying anti-corrosion glue to joints) is required.

　　2. 连接与固定：必须用配套专用连接件，螺栓紧固时加防松垫圈，拼接缝隙≤1mm；水平桥架支架间距1.5-3米，垂直段≤2米，转弯/端部位置需增设防晃支架，防止变形松动。

　　2. Connection and fixation: Special matching connectors must be used, and anti loosening washers should be added when tightening bolts. The splicing gap should be ≤ 1mm; the spacing between horizontal bridge brackets should be 1.5-3 meters, and the vertical section should be ≤ 2 meters. Anti sway brackets should be added at turning/end positions to prevent deformation and loosening.

　　3. 接地规范：桥架本体需用铜排或编织带跨接（每段少1处），两端与接地干线可靠连接，接地电阻≤4Ω，防爆场景需≤1Ω，避免静电或漏电风险。

　　3. Grounding specifications: The bridge body needs to be bridged with copper bars or woven tapes (at least one per section), and both ends should be reliably connected to the grounding main line. The grounding resistance should be ≤ 4 Ω, and in explosion-proof scenarios, it should be ≤ 1 Ω to avoid static electricity or leakage risks.

　　4. 环境与布局：避开强电干扰、高温热源（如锅炉、排气管）及尖锐物体碰撞区域；敷设坡度需符合要求（水平≤2‰，垂直段需有防滑措施），电缆敷设后避免桥架过载。

　　4. Environment and layout: Avoid strong electrical interference, high-temperature heat sources (such as boilers and exhaust pipes), and areas where sharp objects collide; The laying slope must meet the requirements (horizontal ≤ 2 ‰, anti slip measures must be taken for vertical sections), and overloading of cable trays should be avoided after cable laying.

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