电缆桥架的使用在户外一些区域使用比较频繁，主要用于电缆的架设，它的使用有利于保护电缆，发挥的作用较大，因其使用比较广泛，且使用场合不固定，出现了很多不同样式的桥架类型，其中包括大跨距式、镀锌桥架、防火桥架等。多种样式存在，后期在安装时相对比较简单，那么，电缆桥架在建设时应该从哪几个方面入手呢?让我们来一起看一下吧。

The use of cable tray is more frequent in some outdoor areas, which is mainly used for cable erection. Its use is conducive to the protection of the cable and plays a greater role. Because of its wide use and unfixed use, there are many different types of cable tray, including long-span, galvanized cable tray, fireproof cable tray, etc. There are many styles, and the later installation is relatively simple. So, which aspects should we start from when building the cable tray? Let's have a look.

一、支、吊架的配置

1、 Configuration of supports and hangers

1、户内支、吊短跨距一般采取1.5-3m。户外立柱中跨距一般采取6m。

1. The short span of indoor support and hoisting is generally 1.5-3m. The middle span of outdoor column is generally 6m.

2、非直线段的支、吊架配置就遵循以下原则。当桥架宽度300mm时，应在距非直线段与直线结合处300-600m的直线段侧设置一个支、吊架。当桥架宽度300mm时，除符合下述条件外，在非直线段中部还应增设一个支、吊架。

2. The support and hanger configuration of non-linear section follows the following principles. When the bridge width is 300 mm, a support and hanger shall be set at the side of the straight section 300-600 m away from the joint of the non-linear section and the straight section. When the bridge width is 300 mm, in addition to the following conditions, a support and hanger shall be added in the middle of the non-linear section.

3、桥架多层设置时层间的距离为200，250，300，350mm。

3. When the cable tray is set in multiple layers, the distance between layers is 200250300350mm.

4、电缆桥架直线段每隔50m应予留伸缩缝20-30mm(金属桥架)。

4. 20-30mm expansion joint (metal bridge) shall be reserved for the straight section of cable bridge every 50m.

二、防火

2、 Fire prevention

要求桥架防火的区段，需要采用钢制或不燃、阻燃材料。

Steel or non combustible and flame retardant materials shall be used in the section where the bridge is required to be fireproof.

三、接地

3、 Grounding

1、桥架系统应具有可靠的电气连接并接地(只对金属桥架)。

1. The bridge system shall have reliable electrical connection and grounding (only for metal bridge).
            

2、当允许利用桥架系统构成接地干线回路时应符合下列要求。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，桥架的级长方向金属横截面积应不小于规定值。

2. When the bridge system is allowed to form the grounding trunk circuit, the following requirements shall be met. The connection resistance between bridge ends shall not be greater than 0.00033 ohm, and the insulation coating shall be removed from the grounding hole. In the 1kV and below neutral point direct grounding system, the grounding of the receiving equipment is connected with the neutral line of the system. When installing the dynamic cut-off power supply installation, the metal cross-sectional area in the direction of the bridge length shall not be less than the specified value.

3、沿桥架全长另敷设接地干线时，每段(包括非直线段)桥架应少有一点与接地干线可靠连接。

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

4、对于振动场所，在接地部位的连接处应装置弹簧圈。

4. For vibration place, spring coil should be installed at the connection of grounding part.

以上就是电缆桥架在建设时应该注意的几个方面，其中桥架在安装时需要设置支架或者吊架，从而可以保证桥架的正确安装，此外在进行接地工作时也要注意接地的连接，防止影响到桥架的使用。

The above are several aspects that should be paid attention to in the construction of cable tray. The bracket or hanger should be set when the cable tray is installed, so as to ensure the correct installation of the cable tray. In addition, the grounding connection should also be paid attention to when carrying out the grounding work, so as to prevent affecting the use of the cable tray.