When a trench is to be dug, it should be sufficient to allow the installer to install the cables and ducting at the correct depth for the cable being used. The cable should be installed within the specified pulling dimensions and without damaging the cable sheaths.
When laying a cable into an open trench, there are 8 key components within the typical equipment layout used excluding the trench and the cable. Duct rods provide a strong, lightweight, labour saving solution for installing cables into ducts or pipes with or without draw ropes. All cables and ducts laid into cable trrench should be over-protected by a cable protection cover or tape depending upon the highest voltage cable to be protected within the cable duct — typically in the UK the following cable protection tapes and covers are used for LV, MV and HV cables.
Marker tile tapes or Stokbord covers are installed over the cable in the appropriate trench drawings — usually there is no requirement to install either above approved cable ducts installed using trenchless techniques i.
Where electricity, pilot and telephone cables are installed into electricity cable ducts the utility engineering standard would normally recommend all cable ducts entering substations and buildings to be duct sealed to prevent the ingress of water and gas — this also applies to 33kV, 66kV and kV high voltage substation cables where cable transits are required. View product.
By entering your details you give consent to receive free courses and tutorials through email. The engineer should approve the materials to be used. The routes routing as well as the sizes will follow the approved shop drawing. Make sure there is the availability of the approved materials so that the work can be carried out.
The certificate for area handover will be signed for clearance before the cable pulling activity begins. Inspection of the entire route will take place to ensure the completeness of the routing, the appropriateness of the used bends and the lack of sharp edges.
While preparing cable termination, arrangements will be made so that proper spare length is left available at the termination point inside the panels or equipment. Before laying the cable on the pipe rack, scaffolding and platforms will be provided wherever required along the route of the cable tray. Personnel working on cable pulling will be equipped at all times with safety harnesses fixed steadily to the overhead support.
Before Cable pulling commences, the actual length of the route will be measured and checked to ensure the adequacy of provided cable length.
Ensure the cable pulling winch is placed at a suitable position according to the length of the cable and the condition of the site. Placement of cable rollers every meters or as required will ensure that the cable will not be in contact with the tray.
The drum schedule will be used to identify the cable drum that will be used for cable pulling. Prior to cable cutting, an inspection of both ends shall take place to make sure there is sufficient length for proper dressing and end termination. When cable laying is completed, insulation test will take place according to attached format. When more than one wires are installed in the same raceway, they should be pulled in the raceway at the same time. Use guide wires and similar equipment when wire pulling, to support the tension and avoid possible damage.
The purpose of this method statement is to provide general guidelines for cable laying and cable termination for control and signal cables. Supervisor will check cable routing as per project drawings and specifications, all cables, control and instrument to be laid and installed as per above standard details.
Site engineer is to ensure that all activities mentioned above comply with project drawings, specifications and standard details. PTW Holder: Work permit system will be followed.
The material received from client shall be stored in designated area of store. Cable drum is to be shifted to site and jacked up for laying out.
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