In a previous video i showed how a two way. Intermediate to advanced electrical repairs and circuit wiring is best performed by a certified electrician or licensed electrical contractor.

Multiway Switching Wikipedia
Intermediate wiring circuit. The first circuit we will look at is the simplest method and the easiest to understand. Basic electricians pouch of hand tools a voltage tester and a multi meter. Unfortunately this is usually encounted in stairwells with the line from the downstairs lighting circuit and the neutral connected to the upstairs lighting circuit. The diagram shows the common method of wiring an intermediate switch into a two way light switch circuit. Hope it will helps in your home projects. This type of circuit uses two of the two way switches and one or more of the intermediate switches.
Such an arrangement is not permitted as isolating only one of the circuits leaves live wiring depending on the position of the light switches. This page shows it wired in the old cable colours if your house has the new colours you want to go here. In this video im showing wiring connection between 2 way switches and intermediate switch in a lighting circuit. Follow this link if you are looking for a comprehensive step by step guide on two way and intermediate lighting circuit wiring. This video also shows how an intermediate switch works. Below is a given schematic circuit to control a light point from three different places by using two 2 way switches and intermediate switch in the middle of stairs.
There is more than one way to do this depending of the type of cable available and on the installation requirements. If replacing an existing switch note the location of the terminals and the colour and position of cable connections. The single circuit may have one or more lights in it. An intermediate lighting circuit is used when one circuit is to be turned on or off by three or more switches. As a part of the am2 exam you will have to wire up a 2 way and intermediate lighting circuit with one light. Its typically used for a new installation.
Here we have a 3 way switching lighting circuit sometimes called two way switching with intermediate. To wire a three way lighting circuit you will need 2 two way switches and an intermediate switch. Otherwise continue with the am2 exam guide. Please subscribe for more videos. We have our two way switches at either end and then an intermediate switch in the middle. This allows a single light to be turned on or off from any of the switches.
Staircase wiring using intermediate switch. Two way switching 3 wires. A wiring and circuit diagram is shown below. It should be fitted between the first and the last switches on the circuit.