To wire a three way lighting circuit you will need 2 two way switches and an intermediate switch. This allows a single light to be turned on or off from any of the switches.
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Intermediate switch diagram uk. A two way switch and an intermediate switch. Intermediate switch diagram. 60 day return policy on all orders 2 years warranty on all products. This video also shows how an intermediate switch works. This page shows it wired in the old cable colours if your house has the new colours you want to go here. Notice that the wire connected to the com terminals is looped straight through the intermediate switch using a cable connector.
An intermediate switch can be used as a one way or two way switch but is more expensive so would not normally be used for this. The two way and intermediate switch will look the same on the front. To make this circuit work we require two different types of switches. In a previous video i showed how a two way. If replacing an existing switch note the location of the terminals and the colour and position of cable connections. Here we have a 3 way switching lighting circuit sometimes called two way switching with intermediate.
Again the names of the type of switches depends where in the world you live. Were going to focus on the euuk method and colour coding. The hierarchy of switches. The circuit consists of a two way switch at each end top and bottom switches in fig 2 and an intermediate switch in the middle. All three switches are connected together by a three core and earth control cable. Intermediate switches can be used for 1 and 2 way switching.
The diagram shows the common method of wiring an intermediate switch into a two way light switch circuit.
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