Underground service conductors that are not encased in concrete and that are buried 18 inches 457 mm or more below grade shall have their location identified by a warning ribbon that is placed in the trench not less than 12 inches 305 mm above the underground installation.
Underground cable installation procedures.
Underground cable installation cable pre installation procedures the following items are key considerations in preparation for installing the fiber optic cable when the construction is ready for cable placement.
Standardisedcable installation depth to minimum cover of750 mm and maximum depth of 1500mm section 14 9 added section 14 10 clarified marker tape and protective cover requirements section 14 11 clarified cable sealing exposed cables and terminated cables requirements section 14 13 14 14 and 14 15.
Added section on live end.
Underground cable installation equipment procedures when the decision is made to go underground on a new distribution system there are many different areas to consider prior to construction.
Underground cable maintenance procedures routine maintenance can help minimize the frequency of cable faults and these procedures are classified as follows.
These three methods are explained below with their advantages and.
The reliability of underground cable network highly depends upon proper laying of cables quality of cable joints and branch connections etc.
There are three main methods of laying underground cables which are i direct laying ii draw in system and iii solid system.