1. According to the laying trend of cable tray and cable groove, the position and load of embedded steel plate should be reserved for wall hole, floor hole and hanger installation for civil engineering and structural engineering majors. And should be in harmony with the craft profession, the water heating profession and the power profession.
2. Cable tray and cable groove laying should be laid along the wall, column or beam as far as possible.
3. Cables of different voltages and USES should not be laid in the same layer of cable tray:
1. Double circuit cables supplying power to the first-level load with the same path; Power, control and telecommunication cables.
2.1kv above and 1kV and below cables;
3. Cables for emergency lighting and other lighting;
4. If cables of different grades are laid on the same cable tray, partitions should be added in the middle to isolate them.
4. The ground shall be equipped with dark metal groove wiring, which shall be designed in close cooperation with civil engineering, so as to reasonably determine the route path and equipment type selection according to different structural types and building layout.