Pass-through switch: appointment, scheme and video connection of the two-key device

To create maximum comfort, the device to turn off or on the lights in the house must have not only functionality, but also practicality. Compared to pass-through devices with one key, two-button switches due to their versatility are more convenient.

The through design of the two-key model of the switch is nothing else, as two single devices combined in one case, which operate on the principle of contact group switch. Usually such devices have 2 input and 4 weekend contact. There is a pointer on the body of the product, which helps to understand, in which position the device is - on or off.

The main purpose of the circuit breaker

Pass-through device for lighting control in the house on its principle completely repeats the usual stationary analogue and is therefore available with one, two or three independent keys. It's hard to disagree, that the usual design of the switch, installed at the beginning of the flight of stairs or a long corridor and control panel, located at the other end of the room are very convenient for solving the problem of lighting a specific area of ​​the house.

The choice of pass-through design of the switch is primarily based on the number of keys of the device, as it allows to control several light sources at once, connected to such a device. In turn, the possibility of a remote control system or a touch sensor are additional elements, which increase comfort in light control in the house.

Multi-key circuit breakers are best installed in large rooms, in which there are several inputs and different light sources, which need to be included at the same time. In other situations, it is advisable to install single-key through devices, which are more convenient to use and have the simplest connection scheme.

Varieties of circuit breakers

In the market of electrical engineering and related accessories, there are many models of circuit breakers and switches from foreign and domestic manufacturers as the simplest one-button, and multifunction models. The most popular are two-key devices, which can control several lighting devices at once, located in different rooms or in one lamp. Not so popular, but no less efficient are the three-button switches, although the scheme of their connection is much more complicated.

Thanks to the principle of operation of the switch it is possible to organize the control of one lamp from different parts of the house or apartment. But for its implementation requires several one-button devices and a cross switch. And when using several cross devices, you can control the lamp from four points in the apartment.

I want to note, that each additional control point of the light source significantly complicates the connection scheme of circuit-breakers, which can lead to difficulties in maintenance and repair of lighting fixtures in the house. The intricacies of wires can be misleading even to an experienced electrician.

Features of the scheme of connection of through switches from two places

With the correct assembly of the wiring diagram of the double circuit breakers, it is possible to control several qualification groups from two places independently of each other.. At the same time both switches with two keys of through type will operate in two directions., but this requires such work.

1. Two-button switches in the amount of two pieces are installed on pre-selected places in sockets.
2. Lamps are mounted or multi-lamp light sources, such as a chandelier. A three-core phase cable is connected to the lighting fixtures, working zero and ground.
3. Given that, that on each switch on 3 contact, then you will need two three-core cables of appropriate length.
4. The wires are connected in a junction box according to the diagram.

The embodiment of such a scheme, perhaps, and with four one-button circuit breakers, but this is not rational in terms of the cost of additional cables and distribution boxes.

If necessary, a double circuit breaker can be used as a crossover with one key. To do this, switch the corresponding contacts, and the keys are connected to each other for simultaneous operation.

Features of control of the lamp from three places

Two-key push-button switches, as well as analogs with one key can work as cross devices. The principle of switching contact groups has a similar scheme with the control of the lamp from two places. That is, as in the previous case, you need to connect two dual devices and a cross analog in accordance with certain steps.

1. The first step will be to install switches in the sockets, fixed to the wall. This scheme provides a connection 12 wires in the junction box.
2. At the next stage installation of two separate light sources and laying to them cables with the involved zero is carried out.
3. The cable is cut to the required length, while using a three-core wire. It is supplied to the limit switches 6 alive, and a two-button crossover switch has 8 contacts.
4. The phase is fed to the first switch with two pass-through keys, and then following the scheme to other devices.
5. The connection of the second limit switch will be made directly from the luminaire.
6. It is very important to mark all cables and individual cores correctly when laying high-complexity circuits. In order not to make a mistake in the intricacies of wiring, you need to perform step-by-step marking starting from the first wire and continuing from contact to contact. You need to label even seemingly easy to connect cables.
7. As it became known from practice, installation of such a scheme requires the use of an enlarged box or a paired counterpart. This is primarily due to the fact, that in a standard distribution box there is simply not enough space for high-quality connection of wires or because of a large number of connecting blocks it will not be possible to close a cover.

Also, any two-button circuit breakers can be used as conventional analogues. For this purpose, one contact group or not used at all, or through it connect one more separate lighting device. After reading the above methods of controlling the fixtures from different places you can understand, what is a wiring diagram or, as electricians say, circuit diagram of the circuit breaker.

How to connect a circuit breaker to two groups of lamps

Before proceeding to the installation work, it is necessary to understand features of a design of the two-key through switch. As mentioned earlier constructively, these two devices with one key are assembled in one case. Having dealt with this feature, everyone will be able to understand the principle of its operation and methods of connection, performed by analogy with a conventional one-button switch, except for a couple of nuances:

• On the first part of the switch, a, more precisely, electric wire is supplied to both identical halves. On the second device, from which the light source will be connected, each of the output phases will power its own lamp.
• In the case of the design of a single bushing device, a three-core cable is laid to each device. If it is a two-key analogue, then pull five conductors to the first and one more to the second device. The difference in the number of conductors is due to the total phase wire.

Based on the above options for connecting circuit breakers with different numbers of keys and the ability to use their combinations, it is possible to lay out various schemes, which allow you to control lighting fixtures from different parts of the house. Although based on practice, in everyday life it is rare to need to control the lights from more than three different points in the apartment.