Pass-through switches - light in the house

As it may seem, controlling the light is not so difficult. All that is needed is to connect a switch to the mains with a light load. And complete order! A more difficult task is to control lighting in a room from two places at once. But this task can be solved by using single pass-through switches. So, what exactly are they?

First of all, they differ from simple switches in which there is quite an ordinary interruption of the circuit by the fact that three contacts are built in the circuit breakers and there is a mechanism for switching between them. Their main advantage is that the pass-through switches provide the ability to turn off or turn on not only one luminaire, but also a whole group of lighting devices from two points (or more) of the dwelling. Often, these devices are popularly called throw-over or backup switches.

The places for the application of this device are actually not so few, but it is necessary to know thoroughly how to connect the pass-through switch. For example, you can install it in a hall that has a large area - you can, on the one hand, at the entrance, turn on the light, on the other hand, at the output, turn it off. After you have climbed the stairs, there will always be an opportunity to turn off the lighting on it. A through-switch can provide similar convenience and comfort. Such a scheme is able to work not only with lighting, but also with other electrical devices. Nevertheless, even at the stage of construction of the house or during the repair of the apartment, it is necessary to determine exactly where the door switches will be located, so that it is possible for them to qualitatively lay electrical wiring. This is due to the fact that at the end of construction / repair work this will not be so easy, since it will take another additional cable.

In order to prevent confusion, it is worthwhile to understand what kind of difference exists between two-pole and single-pole switches. In two-pole switches, two conductors are closed / disconnected simultaneously - zero and phase, and in single-pole switches - only one. Two-pole bushing switches are mainly used for switching off complex devices that may require increased electrical safety, for example, electric heating boilers. It should be noted that such switches can have more than two keys.

Since speech in this article is about switches, it is useful to know that there are devices using which you can simultaneously control the light and, for example, a fan located in the kitchen. Since when the light is turned off in the kitchen, the fan in the kitchen continues to work, you can always set the time and it will turn itself off. Such devices have a certain name - timers. They can be of several types: for installation directly under the switch in a junction box, for mounting in a cabinet. In any case, you need to make sure that the chosen equipment is completely suitable for your premises.