桥架是电工工程中用于标准化敷设电缆的基础设施，主要功能包括保护线缆、规整走线以及固定于墙面或天花板。根据结构差异，桥架可分为槽式、托盘式、阶梯式、大跨度、网格式、组合式及带隔墙等多种类型，满足不同场景的承载需求。

Cable tray is a basic infrastructure used for standardized cable laying in electrical engineering. Its main functions include protecting cables, organizing wiring, and fixing them to walls or ceilings. According to structural differences, cable trays can be divided into various types such as trough type, tray type, stepped type, large-span, mesh type, combination type, and with partition walls, to meet the load-bearing requirements of different scenarios.

与之功能相似的线槽，则更专注于电源线、数据线等导线的分类敷设与防护。常见的线槽类型包括绝缘线槽、分隔线槽、迷你线槽、环形线槽、盖板式线槽等，材质涵盖金属与塑料，适用于室内装修、弱电系统等精细化布线场景。

Cable trays with similar functions are more focused on the classification, laying, and protection of wires such as power lines and data lines. Common types of cable trays include insulated cable trays, partitioned cable trays, mini cable trays, circular cable trays, and cover type cable trays. The materials used include metal and plastic, and are suitable for fine wiring scenarios such as indoor decoration and weak current systems.

尽管桥架与金属线槽外观相似，但二者存在显著差异：

Although the appearance of cable trays and metal trunking is similar, there are significant differences between the two:

尺寸标准：桥架宽度通常超过200mm，适用于大直径电缆；金属线槽宽度多小于200mm，专为导线设计。

Size standard: The width of the cable tray usually exceeds 200mm and is suitable for large-diameter cables; The width of metal trunking is mostly less than 200mm, designed specifically for wires.

结构特性：桥架多为开放式（如梯形、网格状），材质可选铝合金、镀锌钢板等；金属线槽则以封闭式热轧钢板结构为主。

Structural characteristics: Bridge frames are mostly open (such as trapezoidal or grid shaped), and materials such as aluminum alloy and galvanized steel plate can be selected; The metal trunking mainly adopts a closed hot-rolled steel plate structure.

工程规范：桥架敷设需计算荷载、挠度及填充率，而线槽需符合《民用建筑电气设计规范》的封闭性与接地要求。

Engineering specifications: The installation of cable trays requires calculation of load, deflection, and filling rate, while cable trays must comply with the enclosure and grounding requirements of the "Code for Electrical Design of Civil Buildings".

实际应用中，二者可协同工作——例如从桥架分支配电柜时，常通过金属线槽过渡。选型时需根据电缆规模、环境需求及标准综合考量，以确保布线系统的可靠性与经济性。

In practical applications, the two can work together - for example, when branching from a bridge to a distribution cabinet, they are often transitioned through metal wire trays. When selecting, it is necessary to comprehensively consider the cable size, environmental requirements, and safety standards to ensure the reliability and economy of the wiring system.

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