The use of cables single-threaded (eg ) in cable structures feeding centers is prohibited. Allowed wiring of foreign production, produced by domestic Guests with a mandatory check technical characteristics of the cables. Cabling is allowed after the issuance of SIIiKL Protocol, which confirmed that the characteristics of the cable meet the requirements of gost or tu. New domestic brands cables designed vniikp can be installed in the iss, controlled SSIiKL in the presence of vniikp and manufacturer. Padded new brand of cables during pilot operation are under special control. Requirements for cable, routes before making excavation or construction work by the representatives of the installation company must submit to the district iss project to refine the route cables, because for period of time from design to installation could be changes in the territory on which to lay the cable.
Requirements for inspection trenches trenching done after confirmation that the track is made strictly according to the geodesic by compliance with the vertical marks the bottom of the trench, the trench with bindings to various landmarks. It should particularly pay attention to planning the mark on the entire length of the track. Depth trench from the planning notes should be 8m. When crossing streets, squares – 1,1 m. Less depth of the trench to 0.6 m allowed the cable entry into the building and also at the intersection with underground facilities subject to protection cables from mechanical damage in areas up to 5m. Immediately prior to laying cables in the trench by the representatives of the district, carrying out technical supervision, inspect the readiness of the trench:-powder sand or shallow ground (the thickness of padding should not be less than 100mm), stowage and (if necessary) pipes, pipe diameters and their conformity to the design grade cable-logging sand or shallow land across the highway to follow ing powder cables across the road, half-finished brick or plates for the mechanical protection of cables across the road (or the presence of the signal band), the lack of water in the trench, the absence of stones and other objects in the trench, the radii of the corners rotations trench-deep trench across the highway-sealed pipe penetrations through the issuance of building foundations and walls, spaced around the track linear and angular spots (angular curves rollers should be fixed).