Practical Significance
Fluorescent tubes are widely used in residential, commercial and industrial installation for illumination. Therefore, wiring, testing and fault finding of fluorescent tube is important.
Competency and Practical Skills
This practical is expected to develop the following skills for the industry identified competency: ‘Plan wiring/cabling activities using relevant materials following safe practices’
i. Prepare fluorescent tube light wiring.
ii. Test tube light components.
iii. Repair faults in fluorescent tube.
Practical Outcome
1. Prepare fluorescent tube light fixture wiring and test it.
Relevant Affective domain related Outcome(s)
i. Practice good housekeeping with safety measures.
ii. Demonstrate working as a leader/a team member.
iii. Maintain tools and equipment.
iv. Follow ethical practices.
Minimum Theoretical Background
Fluorescent tube consists of following main components:
1. Fluorescent light bulb / tube
2. Ballast or Choke
3. Starter
Troubleshooting chart of Fluorescent tube:
Practical set-up / Circuit diagram / Work Situation
Resources Required
Precautions to be followed
1 Use 100 W incandescent lamp for testing.
2 Make sure all connection should be tight.
Procedure
1. Check the choke for its short and open circuit by using test lamp as shown in figure 2 and record the result in table 1.
2. Check the starter by using test lamp as shown in figure 3 and record the result in table 2.
3. Test the filament on the both sides of the fluorescent tube for its continuity as shown in fig 4. Discard the fluorescent tube with open or fused filament in either side.
4. Replace the faulty components (if any) & assemble all accessories & connect as per circuit shown in Fig.1
5. Fix the tube rod in the holder.
6. Make sure that the slot in the inner parts of the holder is turned to the proper position.
7. Fix starter properly
8. Connect the tube assembly to the supply & switch on the supply. If tube does not glow, turn the rod properly and fix the starter properly in holder.