PPT-WIRING TWO 3-WAY SWITCHES (2).pptx

Electrical control devices are vital in every household dwellings. This PPT will give you a guide on how to wire a two three-switches that can control lightings.

1. PREPARED BY: MR. BERNABE C. BONTILAO, RME A SIMPLE PRESENTATION ABOUT ELECTRICAL LIGHTING CONTROLS

2. EYE OPENER ACTIVITY GUESSING A 4 PICTURES IN ONE WORD

3. _____ _____ _____ _____ _____

4. _____ _____ _____ _____ _____ _____

5. 3-WAY SWITCH

6. Activity Make a group of 5 members and list down your experiences relating to switching “on” and “off” a light bulb inside your household dwellings.

7. Objectives. At the end of the lesson, you are able to: Explain SPDT or 3-way switch; Describe its operating principle; Wire two 3-way switches; and Appreciate the usefulness of 3-way switches in building wiring installation.

8. Three-Way Switches It is a lighting control that can turn “OFF” or turn “ON” a lighting fixture in two different locations. It is called a 3-way switch because there are 3 conductors connecting the switches.

9. Parts (terminals) of a 3-way switch 1 traveler common 3 traveler

10. Operating Principle of 3-Way Switches Toggling two 3-way switches will cause a closed path to open, or an open path to close.

11. Closed path

12. Open path

13. Toggling Two 3-Way Switches When the contacts of both switches are up, the circuit is complete 1st stage(“on” state) L1 L2

14. 2nd stage (“on”state) When the contacts of both switches are down, the circuit is complete. L1 L2

15. 3rd stage (“off” state) When one contact of the switch is up and one is down, the current reaches a dead end, no current flows, and the bulb is off. L1 L2 L2 L1 4rth stage (“off” state)

16. 3-way switch application L2 L1

17. Steps in connecting two 3-way switches C TR3 TR1 TR1 TR3 C L2 L1 T1 T2 Connect the common terminal of the first 3-way switch to the power source L1.

18. Steps in connecting two 3-way switches C TR3 TR1 TR1 TR3 C L2 L1 T1 T2 2. Connect the pair of travelers of the first 3-way switch to the pair of travelers of the second 3-way switch.

19. Steps in connecting two 3-way switches C TR3 TR1 TR1 TR3 C L2 L1 T1 T2 3. Connect the common wire of the second 3-way switch to one of the terminals of the bulb.

20. Steps in connecting two 3-way switches C TR3 TR1 TR1 TR3 C L2 L1 T1 T2 4. Connect the second terminal of the bulb to the source L2.

21. THE END THANK YOU FOR LISTENING…

22. Summary A three-way switch is a lighting control that can turn “OFF” or turn “ON” a lighting fixture in two different locations. It is called a 3-way switch because there are 3 conductors connecting the switches. Parts (terminals) of a 3-way switch. Toggling two 3-way switches will cause a closed path to open, or an open path to close.

23. Short Quiz. In a ½ sheet of paper, answer the following. Describe briefly a 3-way switch. How does a 3-way switch operate? Draw a typical circuit showing the 4 possible states or stages of a 3-way switch .

24. Assignment. Write in a ½ sheet of paper. 1. What is a 4-way switch? 2. How 4-way switches operate?

25. Practice Task Look for your partner and perform the actual wiring of two 3-way switches using the demonstrator to familiarize the wiring connection.