Page 130 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

EXERCISE 55 : To connect single & twin tube light fitting

Objectives

At the end of this exercise you shall be able to:
• identify the parts of fluorescent tube light fitting
• test the ballast, starter, capacitor and tube light
• make the connection of single & twin tube light and test.

Requirements

Tools/Equipments/Instruments
• Combination Plier 165mm, • Tube light fitting- single & twin
insulated - 1 No. With choke, starter, capacitor
• Screw Driver 150mm, 4’ 40 watts, 230 V - 1 No. each
insulated stem - 1 No. Materials/Components
• Connector screw driver 150mm,
insulated stem - 1 No. • PVC copper wire 1.0 sq.mm - 2 m
• Neon Tester 75mm, 500 V - 1 No. • Hook up wire Single strand - 2 m
• Electrician knife Insulated - 1 No. • Test lamp 100 W, 230V - 1 No.
• Multi meter Digital, 3 digit - 1 No. • Fluorescent tube light 4’ 40 W, 230 V - 3 Nos.
1/2
• Insulation tape PVC, 19mm - 1 role

Procedure

TASK 1:Testing of ballast starter and tubelight
1 Draw the circuit diagram of single tube light connection.
2 Take the single tube light fitting and identify the ballast, starter, capacitor and side holders.
3 Test the ballast by connecting it to the supply in series with test lamp.

Observation: 1. The lamp should glow dim for good condition.
2. If lamp glows bright OR does not glow, ballast is defective.
4 Test the starter by connecting it to the supply in series with test lamp.
Observation: 1. The lamp should glow with flickering for good condition.
2. If lamp glows constantly OR does not glow, starter is defective.
5 Make the connections of single fluorescent tube light as per circuit diagram.

6 Check the connections and connect to 1 ph. AC supply, observe the intensity of light.
7 Switch OFF the supply and disconnect the fluorescent lamp.

TASK 2: Connecting & Testing of twin fluorescent lamp fitting
1 Draw the circuit diagram of twin tube light connection.
2 Take the twin tube light fitting and identify the ballast, starter, capacitor and side holders.
(Twin tube light fitting has each 2 No’s of ballast, starter, capacitor and tube light)

3 Test the ballast and starter before making connections.
4 Make the connections of twin fluorescent tube light as per circuit diagram.
5 Check the connections and connect to 1 ph. AC supply, observe the light intensity of both tubes.
6 Switch OFF the supply and disconnect the fluorescent lamp.

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