Notice that the wire connected to the COM terminals is looped straight through the intermediate . Three core and earth cable is required to install two or three way switching and this should be run from the first light switch to the second ( intermediate ) and then to the third switch and then wired as shown in this diagram. Switch one is the switch that contains the live wire and switched live wire. Hope it will helps in your home project.
Showing my wiring of an intermediate switch working for college.
At this point you will have the Line wire of the supply cable still not connected.
Do NOT connect the Line wire to the Line terminal because then your light would be permanently ON.
What we need is to utilise the two-way and intermediate switching available . This was done in London using 2Volts. All you basically do is Bring you mains to Switches 1 . And so onto the intermediate switch. Short video explain how an intermediate operations in an electrical installation or electrical wiring. THIS VIDEO BASICALLY FOCUS ON HOW TO IDENTIFY INTERMEDIATE SWITCH AND ITS TERMINALS.
Tackling an electrical or wiring job? Be cautious when opening up multi-way switches. The lights they control should take power from the same circuit, but if yours are incorrectly wired and take power from different circuits, there will be live cables at each switch position when one circuit is isolated. There is more than one method of wiring multi-way lights. One minor issue, my lighting circuit goes from switch box to switch box.
Three way light switching wiring diagram (new cable colours). All earth wires should connect to the earth terminal in the switch . Connect the cables as shown in the wiring diagram. Wire each circuit to individual switches. It is effectively three single gang intermediate switches on one face plate.
Generic – Double-pole, Double Throw (DPDT) . Intermediate switch wiring diagram (new cable colours). Dotted lines show alternative switch positions. Two-way switching plus intermediate switching. All work carried out should comply with all applicable Wiring Regulations.
Read the instructions carefully before commencing installation. Incorrect installation will invalidate your guarantee. An intermediate switch is used if more than two switches . Make sure you always use the same size wire in your circuit.
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