1, the height of the ground should be lower than 2.50M when the cable tray is installed horizontally, and the metal cover shall be added to the 1.80m below.

　　2、在电缆桥架布线时，其电缆不应有黄麻或其他易延燃材料外护层。

　　2. When cable bridge cabling is used indoors, the cable should not have jute or other easy - to - burn material outer protective layer.

　　3、电缆桥架与各种管道平行或交叉时，其小净距应符合表DQ4-1的规定，电缆桥架不宜安装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。

　　3, when the cable bridge is parallel or crossing with all kinds of pipelines, its minimum net distance should comply with the regulation of table DQ4-1. The cable bridge shall not be installed below the corrosive gas pipeline and the heating pipeline and below the corro
sive liquid pipeline, otherwise, the corrosion protection and heat insulation measures shall be taken.

　　4、在有腐蚀或特别潮湿的场所采用电缆桥架布线时，应根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。

　　4, when there are corrosive or especially wet places for cabling, the corresponding protective measures should be taken according to the different corrosive media, and plastic sheathed cables should be chosen.

　　5、在电缆桥架上可以无间距敷设电缆，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％。

　　5, on the cable bridge, the cable can be laid at no distance, and the filling rate of the cable in the cross section of the bridge shall not be greater than 40%, and the control cable should not be greater than 50%.

　　6、电缆桥架水平安装时，宜按荷载曲线选取佳跨距进行支撑，跨距一般为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安装时，各相邻电缆桥架间应考虑维护、检修距离。

　　6. When the cable bridge is installed horizontally, the best span should be selected according to the load curve, and the span is generally 1.5 ~ 3M. The spacing of the fixed point should not be greater than 2m when vertical laying.  When several groups of cable bridges are installed at the same height, the distance between the adjacent cables should be considered for maintenance and maintenance.

　　7、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。水平敷设时，电缆的首、尾两端、转弯及每隔5～10m处。

　　7. The cable in the cable bridge shall be fixed in the following parts. When vertical laying, the upper end of the cable and every 1.50 to 2m. At the time of horizontal laying, the head and tail ends of the cable, the turn and every 5 to 10m.

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