1) Snap line positioning: determine the direction of the bridge according to the design drawings, find the horizontal line or vertical line from the beginning to the end, snap the line outside the center of the line with a powder bag, find out the specific positions of the junction box, junction opening and support respectively according to the requirements of the design drawings and the provisions of the construction acceptance specifications, and mark them with pencils. Generally, the spacing between supports is 1.0-1.5m.
2) Cable tray laying: place the junction box and support according to the standard position, and then place the cable tray and outlet. At the same time, add various accessories as needed. The upward cable tray does not have to stand too long, otherwise it is easy to be broken. After the connection, adjust the bracket and plastic cover to make the outlet to a proper height. The position is correct, the fixation is firm, and the direction is reasonable. The allowable deviation of straightness and verticality of the horizontal or vertical laying part of the bridge shall not exceed 5mm. In order to prevent mortar from entering, the periphery of each connection is smeared with special glue, the covers of each junction box and outlet box are tightened, bound with iron wire, and the end is blocked with plastic. When pouring concrete, special personnel shall be assigned to take care of it, and problems found shall be handled in time.
3) Welding of jumper wire: determine the specification of jumper wire according to the construction specification. The welding surface at both ends of the ground wire shall not be less than 6 times the cross-section of the jumper wire, and the weld shall be uniform and firm.
4) Wiring in the groove: first clean the bridge, insert the belt line to the outlet, then tie the cloth strip to one end of the belt line, pull out the cloth strip from the middle end, and repeatedly clean up the sundries and ponding in Shandong bridge, or blow out the sundries and ponding in the bridge with air compressor. Before setting out, check whether the day protection at the connection of pipe and bridge is complete.
5) For line inspection and insulation telemetry, please refer to the relevant parts of the installation project of insulated conductor passing through the pipe.
6) Panel installation: cooperate with decoration and install corresponding panels according to the purpose of each outlet.
The process and technical requirements for the actual laying of cable tray are the contents explained above. If you have any problems during this period, please pay attention to our website http://www.sddlqj.cn Consult.