Page 35 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

EXERCISE 10 : To make PVC wire joint

Objectives

At the end of this exercise you shall be able to:
• mark and cut the required length of PVC copper wire
• Skin the insulation of PVC wire and measure the gauge of conductors
• perform the straight joint on PVC copper wire.

Requirements
Tools/Equipments/Instruments

• Combination plier 165mm, • Steel rule 30 cm -1 No.
insulated -1 No. • Rubber mallet 0.5 Kg -1 No.
• Flat Nose plier 150mm, • Standard wire gauge 1 - 38 SWG -1 No.
insulated -1 No. Materials/Components
• Side cutting plier 150mm,
insulated -1 No. • PVC copper wire 7/20 - 50 cm.
• Electrician Knife Insulated -1 No. • Cotton waste - as reqd.

Procedure

TASK 1: Cut & straight the PVC coppper wire
1 Take the PVC copper wire and cut into two equal pieces.
2 Straighten the both pieces of copper wire with rubber mallet.
3 Make a small U bend at one end of both pieces of copper wire.

TASK 2: Perform the straight joint on PVC copper wire
1 Remove the insulation of 12 cm on both pieces of PVC copper wire with Electrician knife.
2 Spread the 7 conductors of both pieces of PVC copper wire as shown in fig.
3 Cut the centre conductor of both pieces of PVC copper wire with side cutting plier.
4 Now make the straight joint by twisting the conductors uniformly as shown in fig.
5 Straighten the completed joint with rubber mallet.

Safety precautions
• Use proper and insulated tools.
• Don not damage the conductors while removing insulation.
• Ensure No gaps & overlap of conductors while making the joint.
• Take care to avoid injury while removing insulation by knife.

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