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、沿电缆桥架全长另敷设接地干线时，每段（包含非直线段）电缆桥架应起码有一点与接地干线可靠连接。

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、电缆桥架系统应具有可靠的电气连接并接地（只对金属桥架）。

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

3、当允许利用电缆桥架系统构成接地干线回路时应符合以下要求。电缆桥架端部之间连接电阻应不大于0.00033欧姆，接地孔应绝缘涂层。在1KV及以下中性点直接接地系统中，受电设备的接地与系统中性线接地相连。装有处动切断供电装轩时，电缆桥架的级长方向金属横截面积应不小于规定值。

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.

综上所述就是对电缆桥架接地要注意什么的介绍，希望能够帮到大家。电缆桥架接地是非常重要的，不仅仅是为了我们的生命财产，也是为了避免火灾的发生。

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.