prot
ection of cables of low and high voltage installation directly into the soil through water obstacles, as well as in tubing, blocks, bridges and viaducts.
Highways and Railways
street light control signals, cable system, signaling and control traffic lights.
COMMUNICATION LINES
telephone, television and computer cable lines.
Classification by color protective double-walled tubing PEX cable
red – for electric cables
blue – for communications and telecommunications systems
black – for the cable lines of general purpose
1. The diameter of the protective tube is determined by the type of cable and the number of cable lines. Possibility of laying a protective tube of large diameter of several protective tube of smaller diameter.
2. Dug a trench depth of 70 cm (in the green zone is allowed penetration of 40 cm, in the hard ground and under the sections of road – up to 1 m). The width of the trench is calculated from the diameter of the tubing and laid to the number of lines. In the case of stacking two or more lines of horizontal tubing arrangement, in short segments in special cases can be vertical stacking.
3. Under roads, in bridges and overpasses laid additional backup line. The tubing is placed on the sand.
4. tubing connection is made through the couplings of PEX with O-rings.
5. The sequence of operations: first, to lay tubing and installed inspection pits, and then through the tube is pulled the cable, then installed cable boxes and the line put into operation, then sealed the points of entry tubing in wells and cover the wells, then the route set route information boards indicating the purpose and the depth Bookmark cable.
6. In private switchboards and telephone stations, indoor laying tubing in mines and tunnels, use additional accessories: clip-on earrings with snap fasteners for fixing the tubing on vertical surfaces, and the holders of the distance to align the multiple tubing.