WORKING OF TWO WAY SWITCHES
To control the light with two switches we need two switches with three terminals on back. The one terminal is common line one and other terminal line two.Get More Electrical Concept And Interview Questions By Using This Link
How two way switches work?
Let’s control the light fitting by using the two way switch. We have electricity coming from consuming unit and feeding the light fitting. Take live wire and connect to the common terminal of switch1 and run another wire from common terminal from switch2 and connect to lamp. Now its need to connect two switches connect terminal L1 in switch1 and L2 in switch2. Place a brown sleeve on both ends of the wire L1 and L2 to worn out heat in live. Run another wire from terminal L2 in switch1 to connect in terminal L1 in switch2. Again place a brown sleeve on both ends. At this moment electricity make through switch1 and switch2 but the circuit is broken at switch2. Flip the switch2 the circuit is complete and electricity will runs through entire circuit and lamp is ON.
Flip switch1 circuit is broken again so the lamp turns OFF but electricity still flow switch2 even circuit is broken flip switch1 to again to complete circuit or flip switch2 and circuit is complete and light switch ON.
Therefore flip switch1 and switch2 to make to operate the circuit and control the light fitting with two switches.
There are different types of two way circuits, let’s see
Circuit 1: Convert one way to two way
The second common way to control the light with two switches convert one way swathe in to two way again we need two switches and to check backside with three terminals on each with common, line 1 and line 2.
In one switch has two terminals and need to replace we can’t able to feed the live wire direct to the light. Connect the live wire in terminal L1 in switch1. Then run a grey wire from terminal L1 in switch1 to terminal L1 of switch2. Place the brown sleeve for worn cable indicates the live wire. Run the brown cable between the switch1 and switch2 in common terminal. Then run the black wire from terminal L2 of switch1 to terminal L1 of swicth2. Place brown sleeve on both ends indicating live. Finally complete the circuit connect terminal L2 of switch1 to the light fitting.
The electricity is switched ON the electricity flows from switch1 to swicth2 with circuit but the circuit is broken. Flip switch2 to complete the circuits and electricity can flow through the common and out to the lamp.
Flip switch1 we break the circuit light fitting and lamp gets OFF.
Flip swicth2 we make circuit again electricity will flow to the light fitting.
Circuit 2: convert one way to two way
It works almost identically as shown as circuit 1. Run the live wire connect in terminal L2 of switch1. Run the brown cable from terminal L2 of switch1 to terminal L1 of switch2. Then run the grey wire from the terminal L2 of switch2 to terminal L1 of switch1. Then place the brown sleeve at the both ends of wire to indicate the hot live. Run the black wire of common terminal between switch1 and switch2. Place the brown sleeve at both the ends. Finally connect the blue wire from terminal L1 of switch1 to back to light fitting again placing brown sleeve at each end.
When electricity starts the circuit is broken electricity passes through switch1 and switch2 it reaches the dead end.
If we flip switch1 we complete the circuit electricity flow through switch1 into switch2 then back to switch1 and up into the lamp.
Flip switch2 we break the circuit the electricity flows between the switches and doesn’t reach the light.
Flip switch1 electricity will flow through switch1 over to switch2 across the switch and back over the switch1 and flow to light fitting.
Circuit 3: convert one way to two way
Run the live brown wire and connect to terminal L1 in switch1 and again the run wire from L1 terminal of switch1 and connect to terminal L1 to switch2. Run the grey cable between the terminal L2 of switch1 to terminal L2 to swicth2. Place the brown sleeve at the both ends of the wire to indicate live. Connect the black cable from between the two common terminals of switch1 and switch2. Finally run the blue wire from terminal L2 of switch1 from to light fitting.
When electricity flow through the circuit it flow from switch1 through switch2 circuit is broken so the electricity flows to the dead end. So no light will ON.
Flip switch1 the electricity flows from switch1 over to switch2 and return back to switch1 and light gets turned ON.
When flip swicth2 the circuit gets broken and electricity flows in between the switches itself.
Flip switch1 and circuit gets closed and light gets ON. Flip switch2 again circuit will broken and light will switched OFF.