As we all know, cable trays are mainly used for cable laying, especially in petrochemical enterprises. Most of them are flammable and explosive places, so it is also necessary to do a good job in grounding when selecting cable trays for power transmission. Let's see what we should pay attention to when grounding cable trays.

1、沿電纜橋架全長另敷設(shè)接地干線時，每段（包含非直線段）電纜橋架應(yīng)起碼有一點(diǎn)與接地干線可靠連接。

1. When another grounding main line is laid along the whole length of the cable tray, each section (including non-linear section) of the cable tray shall be reliably connected with the grounding main line at least at one point.

2、電纜橋架系統(tǒng)應(yīng)具有可靠的電氣連接并接地（只對金屬橋架）。

2. The cable tray system shall have reliable electrical connection and grounding (only for metal tray).

3、當(dāng)允許利用電纜橋架系統(tǒng)構(gòu)成接地干線回路時應(yīng)符合以下要求。電纜橋架端部之間連接電阻應(yīng)不大于0.00033歐姆，接地孔應(yīng)絕緣涂層。在1KV及以下中性點(diǎn)直接接地系統(tǒng)中，受電設(shè)備的接地與系統(tǒng)中性線接地相連。裝有處動切斷供電裝軒時，電纜橋架的級長方向金屬橫截面積應(yīng)不小于規(guī)定值。

3. When it is allowed to use the cable tray system to form the grounding trunk circuit, the following requirements shall be met. The connection resistance between the ends of the cable tray shall not be greater than 0.00033 ohm, and the insulating coating shall be removed from the grounding hole. In the neutral point direct grounding system of 1kV and below, the grounding of power receiving equipment is connected with the neutral line grounding of the system. When a power cut-off device is installed, the metal cross-sectional area of the cable tray in the level direction shall not be less than the specified value.

綜上所述就是對電纜橋架接地要注意什么的介紹，希望能夠幫到大家。電纜橋架接地是非常重要的，不僅僅是為了我們的生命財產(chǎn)，也是為了避免火災(zāi)的發(fā)生。

To sum up, it is an introduction to what should be paid attention to in cable bridge grounding. I hope it can help you. Cable bridge grounding is very important, not only for the safety of our lives and property, but also to avoid fire.