Page 61 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

EXERCISE 23 : To demonstrate multi-storied building

wiring

Objectives

At the end of this exercise you shall be able to
• draw the layout diagram & wiring diagram of building wiring
• make the estimation and costing of multi-storied building wiring
• selection of electrical accessories required for multi-storied building wiring
• erection of multi-storied building wiring and testing.

Requirements

Tools/Equipments Materials
• Combination Plier 165mm, insulated - 1 No. • PVC copper wire 1.5 sq.mm - as reqd.
• Screw driver 150mm - 1 No. • Electrical wiring accessories -
• Neon tester 75mm, 500 V - 1 No. Any rating - as reqd.
• Electrician Knife Insulated - 1 No. • Test lamp 100 W, 230V - 1 No.
• Ball peen hammer 500gm - 1 No. • DPST switch 16 A, 230 V - 1 No.
• Cold chisel 25 x 150mm - 1 No.
• Potable electric drill machine
2-10mm - 1 No.
• Bradawl 150mm - 1 No.
• Megger 500 V - 1 No.
• Multi meter Digital, 3 digit - 1 No.
1/2

Procedure

TASK 1 : Make the electrical wiring layout of building
1 Draw the layout diagram & circuit diagram of multi-storied building wiring.
2 Calculate the No. of lighting & power points and total power requirement for the building.

3 Calculate current rating of main switch fuse and main distribution board.
4 Make estimation and costing of electrical accessories, protective elements, wires & cables etc.
5 Select the electrical accessories, protective elements, wires & cables etc required for the wiring.

TASK 2 : Erection of building wiring
1 Mark the position of meter board, main distribution board & electrical points in all the floors of building as per
layout diagram.
2 Fix the PVC conduit pipes as per marked position of electrical points in all the floors of building.
3 Fix the flush type switch boxes, gang boxes, PVC junction boxes, ceiling rose as per No. of points.
4 Draw the PVC copper into the conduit pipes with the help of GI fish wire as per circuit diagram and No. of
points.
5 Fix the meter board and main distribution board with appropriate rating of fuse/MCB’s
6 Fix all electrical accessories viz - switches, sockets, lamp holders etc in lighting circuit and Power circuit.
7 Make the end connections with electrical accessories as per the circuit diagram.

8 Check all the connections, conduct short circuit test and earth leakage test.

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