This method statement explains the site installation & Laying of Low Voltage Cables & Wires associated materials and the requirements of the checks to be carried out.
Method Statement for Laying of Low Voltage Cables and Wires
Purpose and Scope
The purpose of this method is to describe the measures and ways of proper installation of Low Voltage Cables and Wires in this project. Works shall be carried out in compliance with the drawings, project specifications, and materials.
This scope of this method of statement is to specify the detailed requirements and procedures for the installation of Low Voltage Armored Cables & Wires requirement for MEP services of the above Areas / Buildings.
1. The engineer should approve the materials to be used. The routes routing as well as the sizes will follow the approved shop drawing.
2. Make sure there is the availability of the approved materials so that the work can be carried out.
3. Materials will be physically inspected before leaving stores to ensure no damage is present.
4. Site Supervisor / Foremen will evaluate drawings and Materials to ensure they are relevant before work starts.
5. The Site Engineer will give appropriate instructions to the Supervisor / Foremen. The Site Engineer will also offer valid construction/shop Drawings.
6. Site Supervisor/Foremen will make sure that available equipment and tools are compliant with required regulations.
7. The Site Supervisor also informs the tradesmen about the required safety precautions.
8. The certificate for area handover will be signed for clearance before the cable pulling activity begins.
9. 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.
10. Make sure that only the last revision drawings are used.
11. Identify where the panels/equipment are located.
12. 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. The maximum spare length will equal the sum of the panel’s depth, width, and height.
13. Before laying the cable on the pipe rack, scaffolding and platforms will be provided wherever required along the route of the cable tray.
14. Ladders shall be used to provide access for roller placement.
15. Personnel working on cable pulling will be equipped at all times with safety harnesses fixed steadily to the overhead support.
16. Before Cable pulling commences, the actual length of the route will be measured and checked to ensure the adequacy of provided cable length.
17. Ensure the cable pulling winch is placed at a suitable position according to the length of the cable and the condition of the site.
18. Cable shall be tested both before removal from cable drums and on-site with a 1 KV insulation tester (5KV for MV Cables).
Method of Installation / Laying of Low Voltage Cable
1. Cables placement will take place mainly above ground in perforated, ladder-type cable trays.
2. Placement of cable rollers every 6-12 meters or as required will ensure that the cable will not be in contact with the tray.
3. If a cable winch is used, it will be installed properly for cable pulling.
4. The drum schedule will be used to identify the cable drum that will be used for cable pulling.
5. Unpack the cable drum.
6. A gripper or a cable shock will be used to fix the cable to the winch.
7. Cable laying will begin from one end of the route or any other suitable point if needed
8. The cables’ bending radius will conform to the cable manufacturer’s recommendation.
9. 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.
10. Right after every cable is finished, all cables shall be tested for insulation resistance
11. Installation of cable tags.
12. Update the cable and drum schedules with cable pulling information.
13. Following completion of all same route cables, cable dressing and clamping will take place.
14. Trefoil (three-foil formation) laying shall be used with single-core cables.
15. Punch list and installation shall be inspected.
16. When cable laying is completed, insulation test will take place according to attached format.
Method of Installation / Laying of Wires
1. Raceways’ inspection will make sure that wires are compliant with the installation
2. When more than one wires are installed in the same raceway, they should be pulled in the raceway at the same time.
3. Use guide wires and similar equipment when wire pulling, to support the tension and avoid possible damage.
20. Wherever the Engineer approves, use lubricant or wire pulling compound if necessary. Ensure that the pulling compound used is chemically compatible with any insulations or conductors it touches.
21. Conductor splices must be enclosed in junction boxes
22. Use a minimum of 300mm of slack conductors inside DB and at each outlet as needed.
23. Ensure proper wire installation in all boxes.
24. Following installation, the Wires Insulation Test should be conducted according to the attached format.
1. Quality control Engineer accompanied by the site supervisor will see that material installation follows the Shop drawing, the specifications outlined in the contract as well as the approved submittals.
2. The consultant will receive a work inspection report (WIR) after the completion of the installation.
1. All works shall comply with safety procedure or instruction set out in project safety plan and Municipality rules and regulations.
2. Basic PPE to be worn by all staff or laborers.
3. All operatives involve in this work shall be inducted before entering the site.
4. Toolbox talk shall be conducted regularly.
Equipments & Tools
1. Electrical toolbox
2. Drilling Machine
3. Mobile Scaffolding
4. Telehandler or wheel borrow
Materials & Reference
1. Cables – Material ref. no. —-
2. Wires – Material ref. no. —-
What method or procedure do you use in installing cables and wires? Do you follow the same method statement as above?