Practical Significance
Cable laying is necessary for the electrical installation systems. Laying of the cable depends on the type of installation and whether the installation work is indoor or outdoor.
Competency and Practical Skills
This practical is expected to develop the following skills for the industry identified competency: ‘Plan wiring/cabling activities using relevant materials following safe practices’
i. Select cable laying method
ii. Demonstrate cable laying process
iii. Mark cable route
Practical Outcome
1. Perform cable laying from incoming bus to a machine installation.
Relevant Affective domain related Outcome(s)
i. Practice good housekeeping with safety measures.
ii. Demonstrate working as a leader/a team member.
iii. Maintain tools and equipment.
iv. Follow ethical practices.
Minimum Theoretical Background
v. There are different methods used to lay cable. Normally in the electrical system, most of the high voltage cables are laid under the ground. So many parameters are considered while laying of these cables. In a practical situation, three main Cable Laying Systems are commonly used for laying under ground cables which are.
vi. (i) Direct System, (ii) Draw in System and (iii) Solid System.
Practical set-up / Circuit diagram / Work Situation
Resources Required
Precautions to be followed
1 Avoid sharp bends while laying
2 Care about mechanical damage.
Procedure
1. Prepare a sand bed or fine riddled soil bed as per the measurements given in the drawing.
2. Lay the cable in the middle of the trench.
3. Provide sand bed on top of the cable.
4. Lay the protective tile just above the sand bed.
5. Backfill the excavated soil leaving 300 mm from the ground level.
6. Lay the Cable warning tape and again back-fill the remaining portion of the trench up—to the ground level.