Cable Joint Practical

Cable Joint Practical
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1 Answer

Answer :

Practical Significance

Cable joint is necessary for the different electrical installation systems. Joints are prepared when cable breaks due to fault for any type of installation (indoor or outdoor). Cable jointing is done using cable jointing kit.


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 proper water proofing tape for cable joint

ii. Perform compound filling process

iii. Prepare water proof taping for break/jointed cable.


Practical Outcome

1. Perform compound filling and water proof taping of cable joint.


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

Cable joints play an essential role in the electrical and electronic systems of any home or industry. They connect the power cables and ensure the flow of continuous electric current through them. Different types of heat shrink cable joints are used depending upon their intended application and accordingly the type of requirements will differ.

The heat shrinkable cable joints can be Straight Through for XLPE to XLPE or PILC to PILC Cable and can be Transition Cable Joint type for connection of XLPE to PILC Cable. The voltage grade is from 1.1 kV onwards.


Heat shrinkable cable joints are easy to install and once installed can be used in a trench that is to be immediately back-filled. Cable jointing kits includes Resin Joints, Heat Shrink Cable Joints, heat Shrink Cable Terminations etc.


Practical set-up / Circuit diagram / Work Situation

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Resources Required

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Precautions to be followed

1 Read instruction given with kit before preparing joint.

2 Take care to prevent cutting of wire conductors, uneven stripping length and insufficient cutting of the insulation.

3 Ensure compound prepared by proper stirring.

4 Fill the compound in kit in short time.

5 Use proper size tape and taping process.


Procedure


Compound filling

1. Select the cable of appropriate size for jointing.

2. Select the straight connector of the proper size for cable joint.

3. Remove the insulation of the cable as per the measured dimension.

4. Make the joint of cable using the crimping tool.

5. After preparing joint make the taping on the bare conductor.

6. Fixed the lower and upper PVC caps of jointing kit.

7. Prepare the resin compound solution

8. Pour the solution in to the PVC kit.


Water proof taping

1. Prepare cable joint by the said procedure in above practical

2. Take the water proof tape of appropriate width and length

3. Start wounding of tape 50-75 mm before joint and finish after joint at 50-75 mm.

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