Page 57 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

EXERCISE 21 : To carry out Electrical wiring on PVC

casing capping & PVC conduit pipe

Objectives

At the end of this exercise you shall be able to
• make layout diagram & draw wiring diagram
• selection of electrical wiring accessories and protective devices
• carry out electrical wiring, fixing of electrical accessories & termination
• testing of electrical wiring installation and connecting to main supply.

Requirements

Tools/Equipments
• Combination Plier 165mm, insulated - 1 No. • DP switch 16 A, 250V - 1 No.
• Screw Driver 150mm, insulated stem - 1 No. • SP switch 6 A, 250V, Non modular - 3 Nos.
• Connector screw driver 150mm, • 2 way switch 6 A, 250V, Non
insulated stem - 1 No. modular - 3 Nos.
• Neon Tester 75mm, 500 V - 1 No. • Lamp holder 6 A, 250V,
• Electrician knife Insulated - 1 No. batten type - 3 Nos.
• Ball peen hammer 0.5 Kg - 1 No. • PVC gang box 1 way, Non modular - 3 Nos.
• Bradawl Steel, 150mm - 1 No. • PVC round block 25mm - 3 Nos.
• Steel rule 30cm - 1 No. • PVC conduit pipe & accessories
• Try square - 1 No. 19mm - as reqd.
• Hacksaw with frame 250mm - 1 No. • PVC casing capping &
• Multimeter Digital, 3 digit - 1 No. accessories 1 inch - as reqd.
1/2
• Megger 500 V - 1 No. • Teak wood wiring board 4’ x 4’ - 1 No.
• GI saddle with base 19 mm - as reqd.
Materials • Wood screws Assorted size - as reqd.
• PVC copper wire 1.5 sq.mm - 1 Coil

Procedure

TASK 1: Carry out PVC conduit pipe wiring

1 Make the wiring layout on teak wood wiring board and draw the wiring diagram.
2 Fix the PVC conduit pipes with saddles on wiring board as per wiring layout
3 Fix the PVC round blocks and gang box as per No. of switch & light points of wiring diagram.
4 Draw / insert the wires into the PVC conduit pipe with GI fish wire as per wiring diagram.
5 Fix the electrical accessories viz- DP switch, SP switches and lamp holders after making end connections as
per wiring diagram.

TASK 2: Carry out PVC casing & capping wiring
1 Make the wiring layout on teak wood wiring board and draw the wiring diagram.
2 Fix the PVC casing capping with wood screws on wiring board as per wiring layout.
3 Fix the PVC round blocks and gang box as per switch & light points of wiring diagram.
4. Draw the wires in the PVC casing as per wiring diagram.

5 Once all wires are drawn, close the casing with capping by gently tapping.
6 Fix the electrical accessories viz- DP switch, SP switches and lamp holders after making end connections as
per wiring diagram.

40