Page 34 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

EXERCISE 9 : To make bare conductor joint

Objectives

At the end of this exercise you shall be able to:
• measure the gauge of bare conductor with SWG
• cut the required length of bare conductor to make the joint
• prepare the straight joint of bare conductor.

Requirements

Tools/Equipments/Instruments

• Combination plier 165mm, • Rubber mallet 0.5 Kg - 1 No.
insulated - 1 No. • Standard wire gauge 1 - 38 SWG - 1 No.
• Flat Nose plier 150mm,
insulated - 1 No. Materials/Components
• Electrician Knife Insulated - 1 No. • Bare copper conductor 10 SWG - 50 cm.
• Snip straight 200 mm - 1 No. • Emery paper - 1 piece.
• Bench vice - 1 No. • Cotton waste - as reqd.
• Steel rule 30 cm - 1 No.

Procedure

TASK 1: Cuts & straight the bare conductor
1 Take the bare copper conductor of 50 cm length and clean it with emery paper.
2 Cut the bare copper conductor in two equal pieces by snip straight.
3 Straighten the both pieces of copper conductor with rubber mallet.

TASK 2: Preparation of bare conductor joint.

1 Hold both bare conductors tightly in bench vice.
(Wrap the conductors with cotton cloth to avoid
scratches / damage to conductors)
2 Twist the first conductor tightly over second
conductor in one direction as shown in fig.

3 Twist second conductor tightly over first conductor
in opposite direction as shown in fig.
4 Twist and bend the end portion of conductors with
combination plier.
5 Take out the completed joint from bench vice and
clean and remove the wrapped cotton cloth.
Safety precautions
• Don not over tight the bench vice to avoid damage
to conductors.
• Do not make overlaps & gaps in the joint.
• Take care to avoid injury while cutting & bending
the conductors.

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