电缆槽盒和电缆桥架有以下区别：

　　There are the following differences between cable tray boxes and cable trays:

　　1.规格尺寸：电缆槽盒的尺寸较小，通常在200×100到600×200之间，而电缆桥架的尺寸较大，通常在100×50到1000×200之间。因此，对于电缆数量较多的情况，一般选用桥架。

　　1. Specification and size: The size of cable tray boxes is relatively small, usually between 200 × 100 and 600 × 200, while the size of cable trays is relatively large, usually between 100 × 50 and 1000 × 200. Therefore, for situations with a large number of cables, cable trays are generally selected.

　　2.板材厚度：根据《2008民用建筑电气设计规范》，金属线槽也称槽式桥架，一般由0.4-1.5mm厚的整张钢板弯制而成的槽型部件，而桥架比线槽更加结实，可以承受更多的电线电缆，常用在强电系统中。

　　2. Plate thickness: According to the "2008 Code for Electrical Design of Civil Buildings", metal cable trays, also known as trough type cable trays, are generally groove shaped components made by bending a 0.4-1.5mm thick steel plate. Cable trays are more sturdy than cable trays and can withstand more wires and cables. They are commonly used in high-voltage systems.

　　3.密封性：金属线槽密封性较好，不一定要支架支撑，可以在电缆沟和建筑夹层中敷设。而槽式桥架有些是半敞开式的，需要支架做支撑，通常在室内或室外进行架空建设。

　　3. Sealing: Metal cable trays have good sealing performance and do not necessarily require support brackets. They can be laid in cable trenches and building interlayers. Some trough type cable trays are semi open and require brackets for support, usually constructed overhead indoors or outdoors.

　　4.填充率：根据《2008民用建筑电气设计规范》8.5.3，因安装高度不同，线槽和桥架内的电线电缆总截面要求也是不一样的。线槽内电线电缆的总截面应小于等于线槽内截面的20%，载流导体要小于等于30根，而桥架是电缆的总截面应小于等于截面的40%。

　　4. Filling rate: According to section 8.5.3 of the "2008 Code for Electrical Design of Civil Buildings", the total cross-sectional requirements for wires and cables in cable trays and bridges vary depending on the installation height. The total cross-sectional area of wires and cables in the trunking should be less than or equal to 20% of the cross-sectional area inside the trunking, the number of current carrying conductors should be less than or equal to 30, and the total cross-sectional area of cable trays should be less than or equal to 40% of the cross-sectional area.

　　5.用途：桥架主要用在铺设电力电缆和控制电缆，而线槽的强度较低，通常用在铺设导线和通讯线缆，例如网络电话等。

　　5. Purpose: Cable trays are mainly used for laying power cables and control cables, while cable trays have lower strength and are usually used for laying wires and communication cables, such as network telephones.

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