Cross switch: wiring diagram, mounting features. Legrand Switches

In narrow long corridors and on stairs in oneThe place to turn on the light is inconvenient, since it takes half way to pass in the dark. A simple solution is the inclusion of two pass-through switches (SW). When this number is not enough, use a cross switch, the circuitry of which is presented below.

In contrast to the checkpoints, it has four contacts, not three. With it, one of the two lines closes.

Operating principle

A cross device can only work whenswitching polarity of the power supply, for example, when it is necessary to reverse the motor. Here the principle of operation is extremely simple: if you apply voltage to the input, when you switch the key on the output, they will change places "plus" and "minus".

In fact, the device is a switchlines - one turns off one at a time and another one turns on. It is always set between PV. The device contains a pair of input and output contacts. In one position, the first input and output wires are closed. Accordingly, the second ones are also closed. When switching the key, the first input wire closes to the second output, and the second input one to the first output. It is important to connect the contacts correctly, otherwise the system will not work properly.

Cross switch, wiring diagram

The switch is set up with two pass-throughs, as it is not used on the home network alone. Most of the connections are made through the junction box.

The cross-pass-through switch is the connecting part between the two-way switches: it consists of 2 cores with one and the same output on the second one.

On the reverse side of the cross device on each pair of terminals, the arrows indicate the input and output.

Features of the cross switch

How the device works:

• connection is via a four-wire cable;
• if several switches are used, all of them are connected in the same chain with each other, where the outputs of the previous one are connected to the inputs of the subsequent one;
• when creating complex contact groups, a cable with a large number of cores is used;
• Electricians prefer to apply a few simple circuits instead of one complicated.

Selecting a cross switch

In the store, the buyer may have problemswith the choice of pass-through and cross switches. Outwardly they look like a device of the usual type, and they are easily confused with each other. The main difference is the number of contacts: for a simple switch there are two, for a through switch - three, and for a cross switch - four. If a two-key model is selected, in each case the number of terminals is doubled.

For open wiring, a waybill is purchasedmodel, and for the hidden - with a recessed box. The junkets are selected for the switches at the store. Pass and cross devices are chosen the same in appearance and type: rotary, key, lever or sensor. The power of the contacts must not be lower than that of the load.

As for the choice of the manufacturer, the Legrand switches proved to work well, although many may not be able to arrange high prices.

Devices are the best solution for lighting control from several locations.

Instructions for connecting a cross switch

The work is carried out in several stages:

1. Development of electrical circuit connections.
2. Shroud laying.
3. Mounting in the wall of the junction box. Its dimensions should ensure the creation of at least 7 connections, as well as the passage of other wires.
4. Disconnection of the current supply to the place of installation by the automatic device in the electrical control panel.
5. Laying the cable from the junction box to the switchboard, switches and lights.
6. Connect the zero conductor to the contacts of the lamps.
7. Connecting the phase conductor to the contact of the first pass-through switch, and then according to the scheme. Wires between switches should be connected in pairs.
8. Connect the contacts from the last PV to the lamps through the junction box.

If the connections were made without marking,you can find paired wire PT. To do this, first the outermost PVs are connected to the network first, and then, by switching each key, the indicator screwdriver finds phases on two of the four wires that go to the output. The remaining two wires should be connected to its other pair of terminals.

Double switch

A double cross switch, as well as a pass-through switch, contains two independent contact groups. They are designed to control lighting on two separate lines, not connected to each other.

In fact, a two-key cross switchis a pair of devices, combined in a common housing. Connection of each line is made in a manner similar to the previously stated instruction. It is advisable to first make the wiring to one luminaire, and then - to the other. In this case, the connection chains should not be connected to each other. The control system of the two light sources becomes complicated when a double cross switch is used. The connection scheme is not particularly complicated, but there are many contacts, and they can create confusion. If some electricians mount it, then during subsequent repairs, others are unlikely to deal with this scheme.

Number of junctions in junction boxsignificantly increases, and a problem arises - to hide everything inside it. In addition, the marking of the cable is also complicated. On sale it is possible to find two-key switches Legrand. The model is quite rare and not always available. Electricians usually try to divide such a scheme into two simple ones.

Conclusion

When it is necessary to increase the number of control pointslighting more than two, a cross switch is used. The wiring diagram must necessarily contain a passing device, except when it is necessary to change the polarity of the power supply. The switching system of lighting from several places is not difficult. It is important to correctly mark the wiring and not get confused in the connections.