When wiring a 2 way switch circuit all we want to do is to control the black wire hot wire to turn on and off the load. An intermediate switch is a three way light switch it is used when you have three or more switches controlling one light the middle switch needs to be an intermediate light switch.

Apnt 159 Standard 3 Way Lighting Circuit With Intermediate
How to wire intermediate switch diagram. By using these switches controlling light can be done from 3 different places. In some countries the four way is called an intermediate switch. You would just continue from one 3 way switch box with the 143 three conductor cable two colored traveler wires a white neutral and a bare or green ground wire in and out of each four way switch box. Construction working of intermediate switch. Featuring wiring diagrams for single pole wall switches commonly used in the home. This simple diagram below will give you a better understanding of what this circuit is accomplishing.
Notice that the wire connected to the com terminals is looped straight through the intermediate switch using a cable connector. In an intermediate switch there are four terminals by which it changes the flowing of electric current from one circuit to another see fig 1 2 and also known as three way switchit has the ability to on and off the electric supply by two ways. Explanation of wiring diagram 1. 3 way light switch schematic diagram using a two wire control. Notice that the wire connected to the com terminals is looped straight through the intermediate switch using a cable connector. The white wires get spliced through.
In that an intermediate switch is used in the middle of the 2 two way switches. Switch wiring shows the power source power in starts at the switch box. Intermediate switch wiringwiring diagram. In this updated diagram 3 wire cable runs between the receptacle and switch and the red cable wire is used to carry the hot source to the switch. Three way light switching wiring diagram all earth wires should connect to the earth terminal in the switch back boxes and if you are using metal switches there must be a loop from this earth terminal to the one. How to wire a single switch.
The neutral from the source is spliced through to the switch box using the white wire and in this diagram the white wire is capped with a wire nut. The four terminals of intermediate switch construction and its operation are shown in fig below. Circuit electrical wiring enters the switch box. 3 way lighting circuit 3 way switch. Three way light switching wiring diagram. Black wire power or hot wire white wire neutral bare copper ground.
The intermediate switch includes four terminals where these terminals will change the flow of current from circuit to circuit.