How to carry out cable bridge wiring? We need to know what is the FRP cable bridge, which is assembled by extruded FRP profiles. It is suitable for power cables, control cables, lighting cables and accessories. Compared with the iron bridge, the FRP cable bridge has the advantages of long service life (common design life is 20 years), convenient installation and low cost (the proportion is only 1/4 of carbon steel, no fire is needed in construction, the length of a single bridge can reach 6 meters or even longer), convenient cutting, no maintenance and other advantages, high strength and insulation performance. Good, chemical corrosion resistance and other advantages.

　　假如我们是在复合环氧树脂电缆桥架布线时，其电缆不应有黄麻或其他易延燃资料外护层。在有腐蚀或特别湿润的场所采用电缆桥架布线时，应依据腐蚀介质的不同采取相应的防护措施，并宜选用塑料护套电缆。电缆桥架（托盘）程度装置时的距地高度普通不宜低于2．50m，垂直装置时距地1．80m以下局部应加金属盖板维护，但敷设在电气专用房间（如配电室，电气竖井、技术层等）内时除外。电缆桥架程度装置时，宜按荷载曲线选取佳跨距进行支撑，跨距普通为1．5～3m。垂直敷设时，其固定点间距不宜大于2m。几组电缆桥架在同一高度平行装置时，各相邻电缆桥架间应思索维护、检修间隔。在电缆桥架上能够无间距敷设电缆，电缆在桥架内横断面的填充率：电力电缆不应大于40％；控制电缆不应大于50％。下列不同电压，不同用处的电缆，不宜敷设在同一层桥架上：lkV以上和1kV以下的电缆。同一途径向一级负荷供电的双路电源电缆。应急照明和其他照明的电缆。强电和弱电电缆。如受条件限制需装置在同一层桥架上时，应用隔板隔开。

　　If we use composite epoxy resin cable bridge in the indoor, the cable should not have jute or other flammable material outer protective layer. When cables are used in corrosive or especially wet places, corresponding protective measures should be taken according to different corrosive media, and plastic sheathed cables should be selected. The distance between cable tray and ground should not be less than 2.50m, while the distance between vertical device and ground should be less than 1.80m. The metal cover should be maintained, except when it is laid in special electrical rooms (such as distribution room, electric shaft, technical layer, etc.). When installing the degree of cable bridge, the optimum span should be selected according to the load curve, and the span is usually 1.5-3 M. When laying vertically, the distance between fixed points should not be more than 2m. When several groups of cable bridges are installed in parallel at the same height, the maintenance and repair intervals between adjacent cable bridges should be considered. Cables can be laid on the cable bridge without spacing. The filling rate of the cross section of the cable in the bridge frame should not be greater than 40% for power cables and 50% for control cables. The following cables with different voltages and different uses should not be laid on the same bridge deck: cables above lkV and below 1kV. Two-way power supply cables that supply power to primary load in the same way. Cables for emergency lighting and other lighting. Strong and weak electric cables. If conditions restrict the installation on the same deck of bridge, the partition shall be applied.

　　电缆桥架与各种管道平行或穿插时，其小净距应契合表DQ4-1的规则。电缆桥架不宜装置在腐蚀性气体管道和热力管道的上方及腐蚀性液体管道的下方，否则应采取防腐、隔热措施。电缆桥架内的电缆应在下列部位进行固定。垂直敷设时，电缆的上端及每隔1．50～2m处。程度敷设时，电缆的首、尾两端、转弯及每隔5～10m处。 电缆桥架与各种管道的小净距 表DQ4-1管道类别平行净距(m)穿插净距（m）普通工艺管道 0.40.3 具有腐蚀性液体（或气体）管道0.50.5 热力管道有保温层 0.50.5 无保温层1.01.0电缆桥架内的电缆应在首端、尾端、转弯及每隔50m处，没有编号、型号及起、止点等标志。电缆桥架在穿过防火墙及防火楼板时，应采取防火隔离措施。

　　When a cable bridge is parallel to or intersected with various pipelines, its minimum net distance shall conform to the rules of Table DQ4-1. Cable bridge should not be installed above corrosive gas pipeline and thermal pipeline and below corrosive liquid pipeline. Otherwise, anti-corrosion and heat insulation measures should be taken. The cables in the cable bridge shall be fixed at the following parts. When the cable is laid vertically, the upper end of the cable and every 1.50-2 m place. When the cable is laid to a certain extent, the first and last ends, turning and every 5-10 m of the cable are arranged. Minimum Clean Distance Table DQ4-1 Pipeline Class Parallel Clean Distance (m) Interlacing Clean Distance (m) General Process Pipeline 0.40.3 Corrosive Liquid (or Gas) Pipeline 0.50.5 Thermal Pipeline 0.50.5 Thermal Pipeline with insulation layer 0.50.5 without insulation layer 1.01.0 Cable in cable bridge should be at the head, tail end, turning and every 50 m, No. There are numbers, models, starting and ending points and other signs. Fire-proof isolation measures should be taken when cable bridge traverses firewalls and fire-proof floors.

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