Please search the web or visit Wikipedia for definitions, functions, and uses of the following:
1. Magnetic Contactor or Magnetic Starter
2. Overload Relays
3. Pilot Lamps or Lights
4. Push Button Station or Switch
5. Alarm Bell or Buzzer
6. Timer or Timer Relays
7. Circuit Breaker or Fuse
You will have a quiz on the above for the first hour; discussions on the next hour; laboratory work on the other two hours.
Check or look for traffic light control diagrams and study its wiring, also study how the circuit works.
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