建筑電氣設計和施工中，電纜橋架是要做接地的，這點是比較明確的，但是電纜橋架的支架是否也要做接地？電纜橋架接地標準又是什么呢？下面就讓濟南電纜橋架廠家給大家簡單分析一下吧！

In the electrical design and construction of buildings, it is clear that the cable tray should be grounded, but should the support of the cable tray also be grounded? What is the grounding standard of cable tray? Now let Jinan cable bridge manufacturer give you a brief analysis!

我們所說的電纜橋架接地，更明確一點是指電纜橋架與保護導體相連接，其目的是在橋架內部的電纜發生絕緣破損而使相線與橋架接觸時（發生單相接地故障），接地故障電流能通過保護導體（PE線）返回變壓器的中性點，使得發生絕緣破損的電纜回路的保護電器能及時切除該接地故障，從而消除安全隱患，所以電纜橋架需要做接地。

The grounding of the cable bridge we mentioned more clearly refers to the connection between the cable bridge and the protective conductor. Its purpose is to ensure that the grounding fault current can return to the neutral point of the transformer through the protective conductor (PE line) when the insulation of the cable inside the bridge is damaged and the phase line is in contact with the bridge (single-phase grounding fault occurs), so that the protective apparatus of the cable circuit with the insulation damage can remove the grounding fault in time, Therefore, the cable bridge needs to be grounded.

在施工時必須采取以下措施來確保電纜橋架安全接地：

During construction, the following measures must be taken to ensure the safe grounding of cable tray:

（1）熟悉施工設計文件中關于接地干線設置、連接位置，以及接地干線截面、跨接接地線截面選擇等內容。

(1) Be familiar with the setting and connection position of grounding main line, as well as the selection of grounding main line section and jumper grounding wire section in the construction design document.

（2）接地點可在電氣預埋階段預留引出，以滿足電纜橋架的始端、末端及中間部位的接地要求。接地干線材質、截面應符合設計要求。當設計未作要求時，可參照《驗收規范》中保護導體（PE線導體）截面的規定選擇截面。當接地干線采用型鋼（如扁鋼或圓鋼），其截面應符合設計要求或按相應電導值進行換算。

(2) The grounding point can be reserved and led out at the electrical embedding stage to meet the grounding requirements at the beginning, end and middle of the cable tray. The material and section of grounding main line shall meet the design requirements. If there is no requirement in the design, the section can be selected according to the provisions of the section of the protective conductor (PE line conductor) in the Acceptance Code. When the grounding main line adopts section steel (such as flat steel or round steel), its section shall meet the design requirements or be converted according to the corresponding conductivity value.

（3）跨接接地線應采用銅芯軟導線或鍍錫銅編織線，不應采用單股銅芯導線，其截面應符合設計要求。當設計未作要求時，跨接線允許截面應不小于4平方毫米（銅質）、不大于25平方毫米（銅質）。

(3) The jumper grounding wire shall be copper core flexible wire or tinned copper braided wire, instead of single stranded copper core wire, and its section shall meet the design requirements. When there is no requirement in the design, the allowable cross section of jumper wire shall be no less than 4 mm2 (copper) and no more than 25 mm2 (copper).

（4）跨接接地宜采用焊接在電纜橋架本體上的專用接地螺栓作為跨接接地線連接點，不宜采用連接板連接螺栓作為跨接接地線的連接點；若產品未帶有專用接地螺栓，而施工中用連接板的螺栓進行跨接接地連接時，應將跨接接地連接處的不導電涂層進行處理，以保證跨接接地線的可靠電氣連通。

(4) The special grounding bolt welded on the cable bridge body should be used as the connection point of the jumper grounding wire, and the connecting plate connecting bolt should not be used as the connection point of the jumper grounding wire; If the product is not equipped with a special grounding bolt, and the bolt of the connecting plate is used for the jumper grounding connection during construction, the non-conductive coating at the jumper grounding connection shall be treated to ensure the reliable electrical connection of the jumper grounding wire.

（5）跨接接地可采用每節電纜橋架之間的跨接接地線進行跨接連接，也可采用沿電纜橋架全長敷設一根銅排或銅芯導線或鍍鋅型鋼（扁鋼或圓鋼）作為接地干線，每節（包括直通、彎通等等電纜橋架應至少有1處與其進行可靠連接。連接處的連接螺栓應配置彈簧墊圈，保證連接緊固可靠。

(5) The jumper grounding wire between each section of cable bridge can be used for jumper connection, or a copper bar or copper core wire or galvanized steel (flat steel or round steel) can be laid along the full length of the cable bridge as the grounding main line. Each section of cable bridge (including straight-through, bend-through, etc.) should have at least one reliable connection with it. The connecting bolts at the connection should be equipped with spring washers to ensure that the connection is tight and reliable.

（6）對于鍍鋅電纜橋架可利用其鍍鋅的連接板進行跨接，而不必采用跨接線進行跨接，但連接板的兩端應不少于2個有防松螺帽或防松墊圈的螺栓進行連接固定，避免出現連接松動、脫開等現象，保證跨接接地的可靠連接。

(6) Galvanized cable tray can be bridged by its galvanized connection plate instead of jumper wire, but the two ends of the connection plate shall be connected and fixed by not less than 2 bolts with locking nuts or washers to avoid loosening and disconnection of the connection and ensure reliable connection of the jumper grounding.

（7）支、托、吊架應與電纜橋架可靠連接并接地，可與沿電纜橋架全長敷設的一根銅排或銅芯導線或鍍鋅扁鋼作為PE線的接地線相連接，也可與已有接地電纜橋架進行跨接連接，如可用銅芯軟導線或鍍錫銅編織線進行跨接連接，或不少于2處用爪型螺母與電纜橋架進行連按固定，使其與電纜橋架形成可靠的電氣連通。

(7) The support, bracket and hanger shall be reliably connected and grounded with the cable tray, and can be connected with a copper bar or copper core wire or galvanized flat steel laid along the full length of the cable tray as the grounding wire of PE line, or can be connected with the existing grounding cable tray by jumper connection, such as copper core flexible wire or tinned copper braided wire, or at least 2 places can be connected and fixed with the cable tray by claw nut, Make it form a reliable electrical connection with the cable tray.

針對以上的問題，我們再次做出了解答，您對此有怎樣的疑惑點可以隨時來我們網站http://www.yeeones.com進行咨詢了解！

We have answered the above questions again. If you have any doubts about this, please come to our website at any time http://www.yeeones.com Consult and understand!