2) According to the laying direction of cable tray and trunking, the reserved wall hole, floor hole and hanger are proposed to the civil engineering specialty and structural specialty.
Position and load of steel plate to be embedded. And it should be coordinated with technology specialty, plumbing specialty and power specialty.
3) The wiring of underground dark metal trunking should be closely coordinated with the civil engineering specialty in design, and the route and equipment selection should be reasonably determined according to different structural types and building layouts.
4) Cables with different voltages and uses should not be laid in the same cable trough;
(1)/cables above kloc-0/kv and below kloc-0/kv;
(2) Double-loop cable supplying power to main load on the same path;
(3) Emergency lighting and other lighting cables;
(4) Power, control and communication cables. If cables of different grades are laid in the same cable trough, a partition should be added in the middle.
5) When additional concentrated load is not needed for installation or maintenance under engineering conditions, the work uniform load of cable ladder and bridge frame should be based on the cable weight.
Uniform distribution calculation.
6) The requirement for bridge installation in engineering design is that cable bridge shall not be laid in parallel with the following pipelines. When unavoidable, the cable tray shall
Location should meet the following requirements, or take corresponding protective measures.
(1) The cable tray shall be above the corrosive liquid pipeline.
(2) The cable tray should be below the thermal pipeline.
(3) When flammable and explosive gas is heavier than air, the cable tray should be above the pipeline.
(4) When flammable and explosive gas is lighter than air, the cable tray should be below the pipeline.
7) See relevant standards for the minimum distance between cable tray and pipeline.
8) A necessary distance should be kept between the integrated wiring cable and electrical equipment such as motors and power transformers that may generate strong electromagnetic interference nearby. The spacing between the integrated wiring cable and the power cable shall conform to the provisions in Article1-2000 of GB/T 503 1.0.2.
9) The spacing between the integrated wiring cables, optical cables, pipelines and other pipelines laid on the wall shall comply with the provisions in Article1-2000 of GB/T 503 1.0.2.