施工現(xiàn)場(chǎng)采購(gòu)了噴塑橋架，應(yīng)該如何滿足規(guī)范，進(jìn)行可靠的接地措施呢？

　　How to meet the specifications and implement reliable grounding measures for the spray painted bridge purchased at the construction site?

　　丨一：基本規(guī)定?按目前現(xiàn)行非常新規(guī)范，GB 55024-2022 8.7.1條：本條規(guī)范規(guī)定了橋架的基本做法有2點(diǎn)：

　　丨 1: Basic regulations? According to the latest current standard, GB 55024-2022 8.7.1: This standard specifies two basic methods for cable trays:

　　1、橋架本體之間要做好可靠連接；（通常所謂的跨接）

　　1. Reliable connections should be made between the bridge bodies; (commonly referred to as a crossover)

　　2、金屬橋架與保護(hù)導(dǎo)體（通長(zhǎng)導(dǎo)體或接地端子）之間應(yīng)做好保護(hù)聯(lián)結(jié)。

　　2. A protective connection should be made between the metal bridge and the protective conductor (through conductor or grounding terminal).

　　丨二： 橋架本體連接按市場(chǎng)主流產(chǎn)品，金屬橋架目前主要為熱浸（鍍）鋅和非鍍鋅金屬橋架：

　　丨 2: The connection of the bridge body is based on mainstream products in the market. Currently, metal bridges are mainly hot-dip (galvanized) and non galvanized metal bridges

　　1、鍍鋅橋架本體之間可以不跨接保護(hù)聯(lián)結(jié)導(dǎo)體，但是聯(lián)結(jié)板每端應(yīng)有大于或等于2個(gè)連接點(diǎn)，連接方式可以采用防松螺帽或者墊圈，加上螺栓再進(jìn)行緊固；

　　1. Galvanized cable trays may not require cross protection between connecting conductors, but each end of the connecting plate should have at least 2 connection points. The connection method can use anti loosening nuts or washers, and then be tightened with bolts;

　　2、非鍍鋅橋架，應(yīng)做好跨接保護(hù)，如噴涂了防火涂料、噴塑的電纜橋架，無(wú)特殊要求情況下，一般采用4mm2銅芯電線進(jìn)行跨接。這里就會(huì)產(chǎn)生一些疑問(wèn)，通常這些外涂材料都是絕緣的，如何保證接地的有效性呢？

　　2. Non galvanized cable trays should be well protected for bridging, such as cable trays coated with fire-resistant paint or plastic. Unless otherwise specified, 4mm2 copper core wires are generally used for bridging. Here, some questions arise. Usually, these external coating materials are insulated. How can we ensure the effectiveness of grounding?

　　通?？梢圆扇∫韵聨追N措施：

　　Usually, the following measures can be taken:

　　1）接地孔處不進(jìn)行噴涂處理，預(yù)留接地線跨接位置。這種做法的好處就是導(dǎo)體接觸面十分可靠，但對(duì)采購(gòu)標(biāo)準(zhǔn)、制作工藝有一定要求，成本會(huì)略有增加，除非用戶有非常要求，否則普遍做法還是整體噴涂。

　　1) The grounding hole shall not be sprayed, and a grounding wire crossing position shall be reserved. The advantage of this approach is that the contact surface of the conductor is very reliable, but there are certain requirements for procurement standards and manufacturing processes, and the cost will slightly increase. Unless the user has special requirements, the common practice is still to spray the entire body.

　　2）接地處進(jìn)行小面積破漆面處理，18D802關(guān)于此種做法有了明確規(guī)定，24DX002刪除了（也許是漏掉了）刮掉絕緣層處理要求，但是筆者認(rèn)為，18D802想法比較多維度，作為電氣聯(lián)結(jié)措施，應(yīng)進(jìn)行連接處的內(nèi)外層絕緣層刮掉處理，保證聯(lián)結(jié)可靠性。

　　2) Small area paint surface treatment should be carried out at the grounding point. 18D802 has clear regulations on this practice, and 24DX002 has deleted (perhaps missed) the requirement for scraping off the insulation layer. However, the author believes that 18D802 has a comprehensive idea. As an electrical connection measure, the inner and outer insulation layers of the connection should be scraped off to ensure the reliability of the connection.

　　3）采用接地爪墊（刺破墊圈），采用刺破墊圈，代替刮漆處理，墊圈在緊固過(guò)程中，破壞掉絕緣層，爪墊與金屬橋架進(jìn)行有效聯(lián)結(jié)，施工方便快捷（下圖為示例）。

　　3) Using grounding claw pads (puncture washers) instead of scraping paint, the insulation layer is damaged during the tightening process of the washers. The claw pads are effectively connected to the metal bridge, making construction convenient and fast (as shown in the example below).

　　三： 金屬橋架與保護(hù)導(dǎo)體聯(lián)結(jié)金屬橋架與保護(hù)導(dǎo)體直接進(jìn)行連接，此條不管是鍍鋅還是非鍍鋅，都要進(jìn)行相應(yīng)設(shè)置。目前通用做法有2種，一是橋架內(nèi)通常敷設(shè)扁鋼或扁銅（有些工業(yè)場(chǎng)合要求銅材質(zhì)，民用較少）；二是與臨近接地端子進(jìn)行連接。兩種方式都可以。

　　3： The metal bridge and protective conductor are directly connected, whether galvanized or non galvanized, and corresponding settings must be made. There are currently two common practices. One is to lay flat steel or flat copper inside the cable tray (some industrial applications require copper material, which is less common for civilian use); The second is to connect with the adjacent grounding terminal. Both ways are possible.

　　1）通長(zhǎng)敷設(shè)保護(hù)導(dǎo)體，圖集已經(jīng)有完善的做法，參考即可：

　　1) The complete method for laying protective conductors throughout the entire length is already available in the atlas, which can be referred to as follows:

　　2）與就近的保護(hù)導(dǎo)體可靠連接，圖集有做法，但是很容易讓部分設(shè)計(jì)師和施工人員看的迷糊，我前期還要沿線槽敷設(shè)路由預(yù)埋端子？有的畫，當(dāng)然可以了，但是留不準(zhǔn)怎么辦？其實(shí)也沒(méi)必要那么麻煩，由圖可見(jiàn)，水平橋架兩端均與電箱PE線連接，在地庫(kù)、或諸多大型綜合體等水平長(zhǎng)距離橋架時(shí)，中間必然經(jīng)過(guò)很多個(gè)配電箱或設(shè)備，隨便哪里都可以找到保護(hù)導(dǎo)體；如果是電井內(nèi)，那就更簡(jiǎn)單了，每層都有LEB。

　　2) Reliable connection with the nearest protective conductor, there are methods in the atlas, but it is easy for some designers and construction personnel to be confused. In the early stage, I also need to lay pre embedded terminals for routing along the trench? Some paintings, of course you can, but what if you can't keep them? There's actually no need to be so complicated. As shown in the picture, both ends of the horizontal bridge are connected to the PE line of the electrical box. When using a horizontal long-distance bridge in a basement or many large complexes, there must be many distribution boxes or equipment passing through the middle, and protective conductors can be found anywhere; If it's inside an electric well, it's even simpler, as each layer has a LEB.

　　所以不用糾結(jié)了。

　　So there's no need to worry.

　　本文由  山東電纜橋架 友情奉獻(xiàn).更多有關(guān)的知識(shí)請(qǐng)點(diǎn)擊  http://www.xinheli88.com/  真誠(chéng)的態(tài)度.為您提供為多維度的服務(wù).更多有關(guān)的知識(shí)我們將會(huì)陸續(xù)向大家奉獻(xiàn).敬請(qǐng)期待.

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