that feeding other lights on the same storey). The first example given in each case is the preferred connection method, as it ensures the light is powered from the expected circuit (i.e. This is an alternative deprecated form (see above for the reasons) of the multi way switch wiring: Any number of intermediate crossover switches may be added to give three or more switching positions.Īlternative method of Three Way Switching.The switches at each end are 1 pole 2 way switches.In fact any number of intermediate switches can be added, to add as many extra switching positions as required.Īn application of above using multiple switching positions to switch multiple lamps: The addition of an "intermediate" cross over switch allows a two way switched lamp to be controlled from a third position. This can cause interference with inductive loop hearing aid systems for example. This is not only dangerous, but often incompatible with RCD protected circuits.Īnother failing of this layout is that it may generate additional electrical interference and "noise" since the current flow in the link cable between switches is unidirectional (most circuit cables have currents flowing in opposing directions in their separate wires). One potential problem here is where the two switches are in locations covered by different circuits, you may end up with a live feed on one circuit connected to a neutral on a different circuit. This method is also sometimes seen, although its use is deprecated since live and neutral are connected at two different locations. In the above diagram, the black core of the 3&E has been connected to the COM terminal, and the Brown to L1 and the Grey to L2. Two way switches usually have terminals marked COM, L1 and L2. (in the above example the landing light would be switched off, and the hall light would be on) An implementation that allows both lights to be controlled from both locations could look like this: To achieve two way control the usual single switch is replaced with one of the following circuits:Ī typical application is that of being able to switch the hall and landing lights on and off from both upstairs and downstairs. Some manufacturers (especially Hager) put an additional, insulated terminal in the switch, which can be used for looping through the Neutral. NOTE many single way switches will have a space for the L2 terminal, even though it is not fitted since the same plastic casing is usually used for both types. Thanks for any advice available.The terminals on a dual gang two way switch Should I connect the red wire with one of the black wires on the smart switch and then connect the two black house wires together with the remaining black wire on the smart switch? Or do I need a different smart switch? I also have two switches in the kitchen that I expect the same issues with. I have not tried to hook up to Wi-Fi because I can't get the switch to work yet. The switch does not turn the lights on or off manually. So I hooked up the red wire to one black wire on the smart switch and I combined the two black wires from the house with the other black wire from my smart switch. On my old switch there are two black wires connected on one side and a red wire on the other. I hooked up the mew smart switch connecting the green to ground and the white common wires. One switch is located downstairs and and the other two are located upstairs at each end of the hall. I'm trying to install a Kasa HS200P3 smart light switch in my home hallway which currently has three manual switches to control the lights.
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