Page 61 - CITS - Electrician - Trade Practical
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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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