电缆桥架作为布线工程的一个配套项目，目前尚无专门的规范指导，各生产厂家的规格程式缺乏通用性，因此，设计选型过程应根据弱电各个系统电缆的类型、数量，合理选定适用的桥架。下面 山东电缆桥架厂家给您讲讲在施工中桥架安装的一般规定吧。

As a supporting project of wiring engineering, there is no special specification guidance for cable tray at present, and the specifications and programs of various manufacturers lack generality. Therefore, the design and selection process should reasonably select the applicable cable tray according to the type and quantity of cables in each weak current system. Next, Shandong cable bridge manufacturer will tell you about the general regulations for bridge installation during construction.

(1)、确定方向：根据建筑平面布置图，结合空调管线和电气管线等设置情况、方便维修，以及电缆路由的疏密来确定电缆桥架的佳路由。在室内，尽可能沿建筑物的墙、柱、梁及楼板架设。

(1) Determine the direction: determine the best route of cable tray according to the building layout plan, in combination with the setting of air conditioning pipelines and electrical pipelines, the convenience of maintenance, and the density of cable routes. Indoors, it shall be erected along the walls, columns, beams and floors of the building as far as possible.

(2)、荷载计算：计算电缆桥架主干线纵断面上单位长度的电缆重量。

(2) Load calculation: calculate the cable weight per unit length on the longitudinal section of the main line of the cable bridge.

(3)、确定桥架的宽度：根据布放电缆条数、电缆直径及电缆的间距来确定电缆桥架的型号、规格,托臂的长度,支柱的长度、间距、桥架的宽度和层数。

(3) Determine the width of the cable tray: determine the model and specification of the cable tray, the length of the bracket, the length and spacing of the pillars, the width and number of layers of the cable tray according to the number of cables laid, the cable diameter and the cable spacing.

(4)、确定安装方式：根据场所的设置条件确定桥架的固定方式，选择悬吊式、直立式、侧壁式或是混合式，连接件和紧固件一般是配套供应的，此外，根据桥架结构选择相应的盖板。

(4) . determine the installation method: determine the fixing method of the bridge according to the setting conditions of the site, and select the hanging type, vertical type, side wall type or mixed type. The connectors and fasteners are generally supplied together. In addition, select the corresponding cover plate according to the bridge structure.

(5)、绘出电缆桥架平、剖面图,局部部位还应绘出空间图，开列材料表。

(5) Plan and section drawings of cable tray shall be drawn, and space drawings and material lists shall be drawn for local parts.

金属电缆桥架及其支架和引入或引出的金属电缆导管须接地（PE）或接零（PEN）可靠，且须符合下列规定:

The metal cable tray and its support as well as the incoming or outgoing metal cable conduit shall be reliably grounded (PE) or connected to neutral (pen), and shall meet the following requirements:

金属电缆桥架及支架全长应不少于2处与接地（PE）或接零（PEN）干线相连接；

The total length of the metal cable tray and support shall be connected to the grounding (PE) or neutral (pen) trunk line at no less than 2 places;

非镀锌电缆桥架间连接板的两端跨接线铜芯接地线，接地线小允许截面积不小于4mm2；

The copper core grounding wire shall be jumper connected at both ends of the connecting plate between non galvanized cable trays, and the allowable cross-sectional area of the small grounding wire shall not be less than 4mm2;

镀锌电缆桥架间连接板的两端不跨接接地线，但连接板两端不少于2个有防松螺帽或防松垫圈的连接固定螺栓。

The two ends of the connecting plate between galvanized cable trays shall not be bridged with grounding wires, but there shall be at least two connecting fixing bolts with lock nuts or lock washers at both ends of the connecting plate.

电缆敷设严禁有绞拧、铠装压扁、护层断裂和表面严重划伤等缺陷。

The cable laying shall be free from twisting, flattening of armour, breakage of protective layer and serious scratch on the surface.

电缆桥架处如有防火要求的场所，应采取防火隔离措施。

Fire isolation measures shall be taken for places with fire protection requirements at cable trays.

此外要注意，弱电电缆与其它低电压电缆合用桥架时，应严格执行选择具有外屏蔽层的弱电系统的弱电电缆，避免相互间的干扰。更多注意事项就来我们网站 //www.comprepyme.com咨询了解吧！

In addition, it should be noted that when the weak current cable and other low-voltage cables share the bridge, the weak current cable of the weak current system with external shielding layer should be strictly selected to avoid mutual interference. More precautions come to our website //www.comprepyme.com Consult and understand!