04. 3-WAY SWITCHING ELECTRICAL INSTALLATION.pptx

USED BY SENIOR HIGHSCHOOL STUDENTS FOR ELECTRICAL INSTALLATION

1. OBJECTIVES At the end of the lesson the students will be able to: A. Identify the purpose of connecting 3-way switch. B. Performed 3-way connection in two location C. Value the importance of safety precaution in connecting the 3-way switch in two different location.

2. *Precautions and Reminders* In any electrical works, safety precautions come first. That’s why we also need to discuss some safety precautions in order to achieve a safer and better result of works. So, what are the reminders:

3. Safety Precautions 1. Always wear personal protective equipment (PPE) 2. Always have presence of mind while working. 3. Do not connect directly to the source current. 4. Make sure that the two opposite lines not be contact With each other. 5. Used appropriate tools in joining two wires. 6. Test the circuit before connecting it to the source current

4. Steps in wiring 3-way switch 1. Prepare the diagram of the 3-way switch connection in two different location. 2. Connect the ground wire to the one terminal of the receptacle. 3. Connect the live wire to the common terminal of the 1st3-way switch. 4. Connect the n0.1 terminal of the 1st3-way switch to the #1 terminal of the 2nd3-way switch. 5. Connect the no.3 terminal of the 1st3-way switch to the #3 terminal of the 2nd3-way switch. 6. Connect the common terminal of the 2nd3-way switch to the one terminal of the receptacle. 7. Test the connection using multi-tester. 8. Energized.

5. B. Multiple choice 1. How many switches do you need to construct a three-way switch. A. 1 B. 2 C. 3 D. 4 2. What is the purpose of three-way light switch. A. it allows you to dim the light B. it allows you to control the light from two switches C. it allows you to control three switches D. it allows you to stop the flow of current 3. What does a “three” in a three-way switch refer to? A. three terminal in the switch C. three position each switch can be set to. B. three switches in the circuit D. three lamp in two 4. What you must do in testing the electrical current. A. turn of the switch C. turn off power B. remove all the light bulb D. cut the wires 5. What is the most common type of personal of personal protective equipment used. A. hard hat C. gloves B. safety shoes D. safety switch

6. A 3-way switch is one that allows you to control a ceiling light (or other electrical fixture) from two separate locations. The black "hot" wire enters the switch on the left. Three-way wire(which includes red, black and white wires) runs from the switch on the left to the switch on the right, with the white wire carrying ground and the red and black wires carrying the output from terminals in the left switch. 1. B 2. B 3. A 4. C 5. A

7. ASSIGNMENT Draw the Schematic diagram of 3-way switch connection