11 梯架、托盤和槽盒安裝11.1 主控項目（強制條文，必須嚴格執行）11.1.1金屬梯架、托盤或槽盒本體之間的連接應牢固可靠，與保護導體的連接應符合下列規定:1、梯架、托盤和槽盒全長不大于30m時，不應少于2處與保護導體可靠連接;全長大于30m時，每隔20m~30m應增加一個連接點。起始端和終點端均應可靠接地。2、非鍍鋅梯架、托盤和槽盒本體之間連接板的兩端應跨接保護聯結導體，保護聯結導體的截面積應符合設計要求。3、鍍鋅梯架、托盤和槽盒本體之間不跨接保護聯結導體時，連接板每端不應少于2個有防松螺帽或防松墊圈的連接固定螺栓。《T/CECS 31-2017 鋼制電纜橋架工程技術規程》4.8接 地4.8.1 鋼制電纜橋架系統的起始端和終端應與建筑物接地裝置可靠連接，全長大于30m時，每隔20m?30m應增加一個接地連接點。4.8.2 在伸縮縫或連續鉸鏈連接處應采用銅軟導線或編織銅線連接，其截面積不應小于16mm2。

　　11 Installation of Ladders, Trays, and Troughs 11.1 Main Control Items (Mandatory Provisions, Must be Strictly Implemented) 11.1.1 The connection between metal ladders, trays, or trough boxes should be firm and reliable, and the connection with the protective conductor should comply with the following regulations: 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. 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. 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. 4.8 Grounding 4.8.1 The starting and ending points of the steel cable tray system should be reliably connected to the building grounding device. When the total length is greater than 30m, an additional grounding connection point should be added every 20m × 30m. 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 鋼制電纜橋架在岀入建筑物時，應就近與總等電位接地裝置進行聯結。GB50169-2016《 電氣裝置安裝工程接地裝置施工及驗收規范?》3.0.4??電氣裝置的下列金屬部分，均必須接地：(強制條文，必須嚴格執行)7??電纜橋架、支架和井架。GB51348-2019《民用建筑電氣設計標準》8.5??電纜橋架布線8.5.18??金屬電纜橋架應與保護聯結導體可靠連接，且全長不應少于2處接地。高分子合金電纜橋架、玻璃鋼橋架可不接地。GB50606-2010 《 智能建筑工程施工規范?》13.2??設備安.2.1??橋架、管線敷設除應執行現行標準《火災自動報警系統施工及驗收規范》GB?50166—2007第3.2節的規定和本規范第4章的規定外，尚應符合下列規定：3??橋架、金屬線管應作保護接地。

　　4.8.3 When steel cable trays enter or exit buildings, they should be connected to the nearest main equipotential grounding device. GB50169-2016 Code for Construction and Acceptance of Grounding Devices in Electrical Equipment Installation Engineering? 》3.0.4?? The following metal parts of electrical devices must be grounded: (mandatory provisions must be strictly enforced) 7?? Cable trays, brackets, and derricks. GB51348-2019 "Electrical Design Standard for Civil Buildings" 8.5?? Cable tray wiring 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 "Code for Construction of Intelligent Building Engineering"? 》13.2?? Equipment installation 13.2.1?? In addition to complying with the provisions of Section 3.2 of the current national standard "Code for Construction and Acceptance of Automatic Fire Alarm Systems" GB 50166-2007 and the provisions of Chapter 4 of this specification, the laying of cable trays and pipelines should also comply with the following regulations: 3?? Cable trays and metal conduits should be protected by grounding.

　　4.5??質量控制4.5.1??主控項目應符合下列規定：4??橋架、線管及接線盒應可靠接地；當采用聯合接地時，接地電阻不應大于1Ω。GB50168-2018《 電氣裝置安裝工程電纜線路施工及驗收標準?》

　　4.5?? Quality Control 4.5.1?? The main control project should comply with the following regulations: 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 "Construction and Acceptance Standards for Cable Lines in Electrical Equipment Installation Engineering"?

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　　5.2電纜支架的配制與安裝5.2.10??本條文為強制性條文，必須嚴格執行。為避免電纜發生故障時危及人身，金屬電纜支架、橋架、電纜豎井均必須可靠接地，較長時還應根據設計進行多點接地。根據上面的標準相關條文,可將電纜橋架接地的要求總結如下:1、鋼制電纜橋架的起始端和終端必須與建筑物的接地裝置可靠連接。2、當鋼制電纜橋架全長大于30m時,每隔20~30m應設置一個接地連接點。3、在伸縮縫或連續鉸鏈連接處,應使用小截面積為16mm2的銅軟導線或編織銅線連接。4、鋼制電纜橋架應與保護聯結導體可靠連接,全長不應少于2處接地。5、高分子合金電纜橋架、玻璃鋼橋架可以不接地。6、為避免電纜故障時危及人身,鋼制電纜橋架必須進行可靠接地,長距離橋架還應進行多點接地。7、接地電阻不應大于1Ω。電纜橋架需要接地的主要原因是為了確保和可靠的電力傳輸。接地系統在電纜橋架中具有以下幾個重要作用：1、保護：接地系統能夠將電纜橋架上的電荷或電流通過接地導體釋放到地面，避免觸電事故的發生。2、防止電磁干擾：電纜橋架可能會經過電力設備或其他電磁干擾源附近。在這種情況下，沒有接地的電纜橋架可能會成為電磁干擾的傳導路徑，導致電纜信號的干擾和失真。通過接地，可以將干擾電流引導到地下，減少對電纜信號的干擾，確保信號傳輸的可靠性。3、靜電控制：當電纜橋架經過干燥的環境或有靜電積聚的情況下，沒有接地的電纜橋架可能會產生靜電放電。這些靜電放電可能對敏感設備或人員造成損害。通過接地，可以有效地將靜電放電到地下，降低靜電對設備和人員的影響。4、電磁兼容性：電纜橋架作為電力和通信線纜的承載結構，其電磁輻射和敏感性對于其他設備和系統的正常運行可能具有影響。通過接地，可以減少電纜橋架本身的電磁輻射，并提高其與其他設備之間的電磁兼容性。總而言之，接地是為了確保電纜橋架的運行，減少觸電風險，保護設備和人員免受電氣故障、電磁干擾和靜電等不良影響。一般情況下,電纜橋架都需要接地,只有在特殊情況下可以考慮不進行接地:

　　5.2 Configuration and installation of cable supports 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. According to the relevant provisions of the national standards above, the requirements for grounding cable trays can be summarized as follows: 1. The starting and ending ends of steel cable trays must be reliably connected to the grounding device of the building. 2. When the total length of the steel cable tray is greater than 30m, a grounding connection point should be set every 20-30m. 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. 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. Polymer alloy cable trays and fiberglass cable trays may not be grounded. 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. The grounding resistance should not exceed 1 Ω. The main reason why cable trays need to be grounded is to ensure safe and reliable power transmission. The grounding system plays several important roles in cable trays: 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. 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. 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. 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. 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. In general, cable trays need to be grounded, and only in special circumstances can grounding be considered:

　　1. 橋架為完全的絕緣材質制作如果電纜橋架的主體和其它零部件均采用絕緣材料制作,如玻璃鋼、塑料、高分子材料等,確保其絕緣性能良好,可以考慮不接地。

　　1. The cable tray is made of completely insulated material. If the main body and other components of the cable tray are made of insulated materials such as fiberglass, plastic, polymer materials, etc., to ensure good insulation performance, it can be considered not to be grounded.

　　2. 橋架處于性斷電狀態如果電纜橋架所在的供電系統長期處于斷電狀態,不會有電壓通過,也可以考慮暫時不接地。

　　2. The cable tray is in a permanent power-off state. If the power supply system where the cable tray is located is in a power-off state for a long time and there will be no voltage passing through, it is also possible to consider temporarily not grounding.

　　3. 橋架短時用于低壓設備如果電纜橋架僅用于臨時支撐一些低壓的照明電纜等,使用時間很短,也可以考慮不接地。

　　3. Short term use of cable trays for low-voltage equipment. If the cable tray is only used to temporarily support some low-voltage lighting cables and has a short usage time, it can also be considered not to be grounded.

　　4. 橋架處于完全隔離環境如果電纜橋架及電纜系統完全處于一個封閉的隔離環境,與其它系統絕緣,也可以考慮不接地。5. 根據電磁兼容要求在一些對電磁干擾要求極高的場所,接地可能對信號產生影響,可以考慮不接地。除上述特殊情況外,大多數電纜橋架都需要按規范要求進行可靠的接地,這是的基本保障。不接地可能存在隱患。

　　4. The cable tray is in a completely isolated environment. If the cable tray and cable system are completely in a closed isolated environment and insulated from other systems, it is also possible to consider not grounding. 5. According to electromagnetic compatibility requirements, in some places with extremely high requirements for electromagnetic interference, grounding may have an impact on the signal, and it is possible to consider not grounding. Except for the special circumstances mentioned above, most cable trays require reliable grounding according to regulatory requirements, which is the basic guarantee of safety. Not grounding may pose a safety hazard.

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