电缆桥架需要接地吗？

　　Do cable trays need to be grounded?

　　电缆桥架需要接地，看看截止2023年有关桥架接地的相关标准:

　　Cable trays need to be grounded. Please refer to the relevant national standards for tray grounding as of 2023

　　《GB?50303-2015 建筑电气工程施工质量验收规范》

　　GB 50303-2015 Code for Acceptance of Construction Quality of Building Electrical Engineering

　　11 梯架、托盘和槽盒安装

　　Installation of 11 ladder frames, trays, and trough boxes

　　11.1 主控项目（强制条文，必须严格执行）

　　11.1 Main control items (mandatory provisions, must be strictly enforced)

　　11.1.1金属梯架、托盘或槽盒本体之间的连接应牢固可靠，与保护导体的连接应符合下列规定:

　　11.1.1 The connection between metal ladder frames, trays or trough boxes should be firm and reliable, and the connection with protective conductors should comply with the following regulations:

　　1、梯架、托盘和槽盒全长不大于30m时，不应少于2处与保护导体可靠连接;全长大于30m时，每隔20m~30m应增加一个连接点。起始端和终点端均应可靠接地。

　　1. When the total length of the ladder, tray, and trough box is not more than 30m, there should be no less than 2 reliable connections with the protective conductor; When the total length is greater than 30m, a connection point should be added every 20m~30m. Both the starting and ending ends should be reliably grounded.

　　2、非镀锌梯架、托盘和槽盒本体之间连接板的两端应跨接保护联结导体，保护联结导体的截面积应符合设计要求。

　　2. The two ends of the connecting plate between the non galvanized ladder frame, tray, and trough box body should be bridged with protective connecting conductors, and the cross-sectional area of the protective connecting conductors should meet the design requirements.

　　3、镀锌梯架、托盘和槽盒本体之间不跨接保护联结导体时，连接板每端不应少于2个有防松螺帽或防松垫圈的连接固定螺栓。

　　3. When the galvanized ladder frame, tray, and trough box body do not cross connect the protective connecting conductor, there should be no less than 2 connection fixing bolts with anti loosening nuts or anti loosening washers at each end of the connecting plate.

　　《T/CECS 31-2017 钢制电缆桥架工程技术规程》

　　Technical Specification for Steel Cable Tray Engineering (T/CECS 31-2017)

　　4.8接 地

　　4.8 Grounding

　　4.8.1 钢制电缆桥架系统的起始端和终端应与建筑物接地装置可靠连接，全长大于30m时，每隔20m?30m应增加一个接地连接点。

　　4.8.1 The starting and ending ends of the steel cable tray system should be reliably connected to the building grounding device. When the total length is greater than 30m, every 20m? An additional grounding connection point should be added for 30m.

　　4.8.2 在伸缩缝或连续铰链连接处应采用铜软导线或编织铜线连接，其截面积不应小于16mm2

　　4.8.2 Copper flexible wires or braided copper wires should be used at expansion joints or continuous hinge connections, with a cross-sectional area of not less than 16mm2

　　4.8.3 钢制电缆桥架在岀入建筑物时，应就近与总等电位接地装 置进行联结。

　　4.8.3 When steel cable trays enter or exit buildings, they should be connected to the nearest main equipotential grounding device.

　　GB50169-2016《 电气装置安装工程接地装置施工及验收规范?》

　　GB50169-2016 Code for Construction and Acceptance of Grounding Devices in Electrical Equipment Installation Engineering

　　3.0.4??电气装置的下列金属部分，均必须接地：(强制条文，必须严格执行)

　　3.0.4?? The following metal parts of electrical devices must be grounded: (Mandatory provisions must be strictly enforced)

　　7??电缆桥架、支架和井架。

　　7. Cable trays, brackets, and derricks.

　　GB51348-2019《民用建筑电气设计标准》

　　GB51348-2019 "Electrical Design Standard for Civil Buildings"

　　8.5??电缆桥架布线

　　8.5?? Cable tray wiring

　　8.5.18??金属电缆桥架应与保护联结导体可靠连接，且全长不应少于2处接地。高分子合金电缆桥架、玻璃钢桥架可不接地

　　8.5.18?? The metal cable tray should be reliably connected to the protective bonding conductor, and the total length should not be less than 2 grounding points. Polymer alloy cable trays and fiberglass cable trays may not be grounded

　　GB50606-2010 《 智能建筑工程施工规范?》

　　GB50606-2010 "Code for Construction of Intelligent Building Engineering"

　　13.2??设备安装

　　13.2?? equipment installation

　　13.2.1??桥架、管线敷设除应执行现行标准《火灾自动报警系统施工及验收规范》GB?50166—2007第3.2节的规定和本规范第4章的规定外，尚应符合下列规定：

　　13.2.1?? The installation of cable trays and pipelines should comply with the current national standard "Code for Construction and Acceptance of Automatic Fire Alarm Systems" GB? In addition to the provisions of Section 3.2 of 50166-2007 and Chapter 4 of this specification, the following provisions shall also be complied with:

　　3??桥架、金属线管应作保护接地。

　　3. Cable trays and metal conduits should be protected by grounding.

　　4.5??质量控制

　　4.5?? Quality Control

　　4.5.1??主控项目应符合下列规定：

　　4.5.1?? The main control project shall comply with the following regulations:

　　4??桥架、线管及接线盒应可靠接地；当采用联合接地时，接地电阻不应大于1Ω

　　4. Cable trays, conduits, and junction boxes should be reliably grounded; When using joint grounding, the grounding resistance should not exceed 1 Ω

　　GB50168-2018《 电气装置安装工程电缆线路施工及验收标准?》

　　GB50168-2018 "Construction and Acceptance Standards for Cable Lines in Electrical Equipment Installation Engineering

　　5.2电缆支架的配制与安装

　　5.2 Preparation and installation of cable supports

　　5.2.10??本条文为强制性条文，必须严格执行。为避免电缆发生故障时危及人身，金属电缆支架、桥架、电缆竖井均必须可靠接地，较长时还应根据设计进行多点接地。

　　5.2.10?? This provision is mandatory and must be strictly enforced. To avoid endangering personal safety in case of cable failure, metal cable supports, cable trays, and cable shafts must be reliably grounded, and multiple grounding points should be carried out according to the design for longer periods of time.

　　根据上面的标准相关条文,可将电缆桥架接地的要求总结如下:

　　According to the relevant provisions of the national standards above, the requirements for grounding cable trays can be summarized as follows:

　　1、钢制电缆桥架的起始端和终端必须与建筑物的接地装置可靠连接。

　　1. The starting and ending ends of steel cable trays must be reliably connected to the grounding device of the building.

　　2、当钢制电缆桥架全长大于30米时,每隔20-30米应设置一个接地连接点。

　　2. When the total length of the steel cable tray is greater than 30 meters, a grounding connection point should be set every 20-30 meters.

　　3、在伸缩缝或连续铰链连接处,应使用小截面积为16mm2的铜软导线或编织铜线连接。

　　3. At expansion joints or continuous hinge connections, copper flexible wires or braided copper wires with a minimum cross-sectional area of 16mm2 should be used for connection.

　　4、钢制电缆桥架应与保护联结导体可靠连接,全长不应少于2处接地。

　　4. The steel cable tray should be reliably connected to the protective bonding conductor, and the total length should not be less than 2 grounding points.

　　5、高分子合金电缆桥架、玻璃钢桥架可以不接地。

　　5. Polymer alloy cable trays and fiberglass cable trays may not be grounded.

　　6、为避免电缆故障时危及人身,钢制电缆桥架必须进行可靠接地,长距离桥架还应进行多点接地。

　　6. To avoid endangering personal safety in case of cable failure, steel cable trays must be reliably grounded, and long-distance trays should also be grounded at multiple points.

　　7、接地电阻不应大于1欧姆。

　　7. The grounding resistance should not exceed 1 ohm.

　　PART 2

　　PART 2

　　桥架为什么要接地

　　Why do cable trays need to be grounded

　　电缆桥架需要接地的主要原因是为了确保和可靠的电力传输。接地系统在电缆桥架中具有以下几个重要作用：

　　The main reason why cable trays need to be grounded is to ensure safe and reliable power transmission. The grounding system plays the following important roles in cable trays:

　　1、保护：接地系统能够将电缆桥架上的电荷或电流通过接地导体释放到地面，避免触电事故的发生。

　　1. Safety protection: The grounding system can release the charge or current on the cable tray to the ground through the grounding conductor, avoiding the occurrence of electric shock accidents.

　　2、防止电磁干扰：电缆桥架可能会经过电力设备或其他电磁干扰源附近。在这种情况下，没有接地的电缆桥架可能会成为电磁干扰的传导路径，导致电缆信号的干扰和失真。通过接地，可以将干扰电流引导到地下，减少对电缆信号的干扰，确保信号传输的可靠性。

　　2. Preventing electromagnetic interference: Cable trays may pass near electrical equipment or other sources of electromagnetic interference. In this case, ungrounded cable trays may become a conductive path for electromagnetic interference, leading to interference and distortion of cable signals. By grounding, interference currents can be guided underground, reducing interference with cable signals and ensuring the reliability of signal transmission.

　　3、静电控制：当电缆桥架经过干燥的环境或有静电积聚的情况下，没有接地的电缆桥架可能会产生静电放电。这些静电放电可能对敏感设备或人员造成损害。通过接地，可以有效地将静电放电到地下，降低静电对设备和人员的影响。

　　3. Static control: When cable trays pass through dry environments or accumulate static electricity, ungrounded cable trays may generate static discharge. These electrostatic discharges may cause damage to sensitive equipment or personnel. By grounding, static electricity can be effectively discharged underground, reducing the impact of static electricity on equipment and personnel.

　　4、电磁兼容性：电缆桥架作为电力和通信线缆的承载结构，其电磁辐射和敏感性对于其他设备和系统的正常运行可能具有影响。通过接地，可以减少电缆桥架本身的电磁辐射，并提高其与其他设备之间的电磁兼容性。

　　4. Electromagnetic compatibility: As the load-bearing structure of power and communication cables, the electromagnetic radiation and sensitivity of cable trays may have an impact on the normal operation of other equipment and systems. By grounding, the electromagnetic radiation of the cable tray itself can be reduced, and its electromagnetic compatibility with other equipment can be improved.

　　总而言之，接地是为了确保电缆桥架的运行，减少触电风险，保护设备和人员免受电气故障、电磁干扰和静电等不良影响。

　　In summary, grounding is to ensure the safe operation of cable trays, reduce the risk of electric shock, and protect equipment and personnel from adverse effects such as electrical faults, electromagnetic interference, and static electricity.

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