Circuit breaker connection scheme

Circuit breakers allow you to control lighting from two or more different places. In some situations this is not just an additional convenience, but an urgent necessity.

Three-way switch

Three-key switch

You are invited to familiarize yourself with the features of the circuit-breaker, the main options for their connection and direct installation instructions.

Why do I need pass-through switches?

Contents of the article

  • 1 Why are pass-through switches necessary?
  • 2 Circuit-breaker layouts
  • 3 Diagram for lighting control from two places
  • 4 Control of several groups of lighting from two places
  • 5 Three-place lighting control
    • 5.1 Installing switches for lighting control from three different locations
    • 5.2 Kit for operation
    • 5.3 Preparing the STBand niches
    • 5.4 Installing switches
    • 5.5 Video - Circuit diagram of the circuit-breaker
Installation of pass-through switches

Installation of pass-through switches

Most often such switchesSpruce is used in the following places:

  • on stairs. You can install switches on the 1st and 2nd floors. We turn on the light, climb the stairs, turn off at the top. For houses with a height of more than two floors, additional switches can be added to the circuit;
  • in the bedrooms. Install the switch at the entrance to the room, and another one or even two near the bed. They went into the bedroom, turned on the light, prepared for bed, lay down and switched off the lights with a device installed near the bed;
  • in the corridors. Set by the switch at the beginning and at the end of the corridor. We go in, turn on the light, go to the end, turn off.

The list can be continued for a very long time, because for almost every situation there is an option for using a pass-through switch system.

Diagrams for installing switches

There are several options for connecting the devices under consideration. Your attention is offered to the most popular and successful ones.

Diagram for lighting control from two places

This scheme is designed to control lighting from two locations

This scheme is designed to control lighting from two places

The system is assembled from two single-pass single-pass switches.

Each of these devices has one contact at the input and a pair of contacts at the output.

It uses 2 single-pass switches

It uses 2 single-pass switches



From the power source through the distribution box to the lighting device, connect the wire "zero".The phase cable, also passing through the box, is connected to the common contact of the first switch. Output contacts of this switch via the box are connected to the output contacts of the next device.

Scheme for monitoring lighting from two locations

Diagram for lighting control from two places

Finally, the wire from the common contact of the 2nd switch is connected to the lighting device via a junction box.

Control of multiple lighting groups from two locations

Managing multiple groups of lighting devices from two locations

Control of multiple lighting groups from two locations

There is an option that allows you to control two groups of different lighting groups. For example, we need to organize the possibility of controlling lighting in the room directly from the room itself and from the adjacent corridor. There is a chandelier for 5 light bulbs. We can install a pass-through switch system to turn on and off two groups of light bulbs in our chandelier.

Double switch

Double circuit breaker

Double switch

Double circuit breaker

The diagram shows the option of dividing the bulbs into 2 groups. In one of them 3, in the second - 2. The number of lighting devices in groups can vary at the discretion of the owner.

For the arrangement of such a system, we also use 2 pass-through switches, but they must be of a double type, and not a single one, as in the previous version.

How to connect 2 keyswitch

How to connect the 2

pushbutton switch The double switch design has 2 contacts at the input and 4 at the output. Otherwise, the connection order remains the same as the previous method, only the number of cables and controlled lighting devices change.

Three-place lighting control

Control lighting from three places

Three-place lighting control

From previous versions this connection method differs only in that a cross switch is added to the circuit. This device has 2 contacts at the input and a similar number of contacts at the output.

You have familiarized yourself with the most popular circuit diagrams for installing pass-through switches. However, the number of such devices need not necessarily be limited to two or three. If necessary, the circuit can be expanded, including the required number of devices. The principle of operation remains the same for all cases: at the beginning and at the end of the circuit, it is installed on a single three-contact switch, and cross devices with four contacts are used as intermediate elements.

We install switches for lighting control from three different places.

. If the installation of the system for controlling lighting from two different places usually does not cause any problems, becausethe circuit has the simplest form, the installation of three switches can cause certain difficulties for the unprepared installer.

We will consider how to install a system of two pass-throughs and one cross switch. By analogy, you can assemble a chain of more devices.

Disconnect the power supply before proceeding with any further work.

Turning off electricity

Turning off the electricity

To do this, search for the indoor switchboard or in the switchboard on the site( for the apartment owners) the appropriate switch. Additionally, make sure that there is no voltage in the switch wires using a special indicator screwdriver. Also perform a similar check in the places where the instruments are mounted.

The scheme


Set for operation

Set of tools

Tool set

  1. Flat and cross screwdriver.
  2. Stripping tool for wires. You can replace the usual knife.
  3. Side cutters or pliers.
  4. Level.
  5. Indicator screwdriver.
  6. Rotary hammer.
  7. Roulette.
Feedthrough switches

Circuit breakers

Preparation of shrouds and niches

To install switches, we must pre-prepare in the wall shrouds for the installation of electrical cables, power the wires and reach them to the location of installed devices.

Preparation of strobis and niches

Preparing the shtrob and niches

For punching concrete walls, it is most convenient to use a perforator. If the partitions are made of limestone, it is better to make depressions with the help of a a similar material from the puncher will remain too wide and deep shtroba that will make the fixation of the wire difficult and will require a greater consumption of cement or plaster in the future.

For punching brick walls, the perforator should not be used - it is possible to split the masonry. In such a situation, the only safe solution is to lay the cables in pre-fitted seams between the masonry elements.

Wooden walls do not shtrobyatsya - the wires are laid in special protective boxes. Most often, the cable stretches under the baseboard and is output directly under the installation location of the switch.

The first step. We start the work by connecting the wires to the switchboard. No complications at this stage should arise - modern devices allow you to start up to 8 or more wires at once.

Important point! Previously, we need to determine the optimal cable cross-section. Domestic electricity networks can hardly be called stable. The current strength in them constantly jumps, and at the moments of overloading it does increase to dangerous values. To avoid problems with wiring, use copper wires with a cross section of 2.5 mm2.

The second step. We choose the convenient height of the installation of switches. In this moment, we focus entirely on our preferences.

The third step. After determining the height of the installation of switches, proceed to strobleniu. By the width and depth of the stunt we make 1.5 times the diameter of the wire.

Important point! The wires are connected to the switches from below, so we adjust the bar to 5-10 cm below the installation points of the switches. This requirement is relevant purely from the practical side, becausein such conditions, it is easier and more convenient to work with cables.

The fourth step is .We put the wires in the strobes. Fix the wiring elements with small nails. We drive nails into the wall so that they prop up the cable and prevent it from falling out. Before fixing the wires, we need to bring them into the sub-switch( the box).This point will be considered in the main section of the instruction. Shtroby plastered after installing all the switches, making sure the system is working.

Nom.current, A Cable cross-section, mm2 Permissible cable current, A Cable outer diameter, mm
16 2x1,5 20 13
16 3х1,5 18 13,6
40 2x2,5 27 14,6
40 3х4 32 17,6
63 1х10 75 13, 2
63 2х10 60 21,6
63 3х16 70 24,9
100, 160 1х16 100 14,2
100, 160 2х25 100 27
100, 160 3х25 118 31,2

The fifth step. We make holes for the installation of switches according to the dimensions of the instruments used.

Let's move on to the main stage of the work.

Installing switches

Connection scheme for two pass-throughs and one cross switch

Wiring plan for two pass-through and one cross switch

First step. We put the wires from the junction box into the sub-switch. Cut the cables so that approximately 100 mm of their length remains in the mounting box. In this we will be helped by side cutters or pliers. From the ends of the wires we remove about 1-1.5 cm of insulation.

The second step is .Install the through switch. The phase cable( in our example it is white) is connected to the terminal labeled with the letter L. The remaining two cables are connected to the terminals marked with arrows.

Installation of a pass-through switch

Installing the pass-through switch

In your case, the color of the cables may be different. Do not know how the gasket and the connection of the wires in the junction box are made? Then do the following. Turn off the electricity and find the phase. The indicator screwdriver will help you. The phase is a live cable. That's it and connect to the terminal with the letter L, and the remaining wires are arbitrarily connected to the terminals marked with arrows.

The third step is .We are installing the cross switch. To it 4 wires are brought. We have a pair of cables, each of which has veins of blue and white.

Connect the cross switch

Connect the cross switch

We disassemble in the order of terminal markings on the switch. At the top, we see a pair of arrows pointing "inward" of the device, at the bottom they are rushing "from" it.

To the terminals at the top, we connect the first pair of cables from the previously installed pass-through switch. The remaining two cables are connected to the terminals at the bottom.

To find live cables, we turn on electricity and alternately find the phases. First determine the first, changing the position of the first pass button for this. The next phase is found on the cables of the cross switch. Next, we only need to connect the remaining wires to the terminals at the bottom.

Fourth step. We proceed to connect the last switch. We need to find in it the cables through which the voltage from the cross switch goes. At us these cables have a blue and yellow color. We connect them to the terminals marked with arrows. There remains a white cable. We connect it to the terminal marked with the letter L.

We proceed to the last switch in the circuit

We proceed to the last one in the circuit with the switch

We already know the procedure for determining the cables under voltage. In the case of the second switch, we need to connect a wire to which there is no voltage to the L-terminal. The fifth step. Carefully insert the gears into the installation boxes. Wires gently to the base. We fix the devices. In this we will help fasteners in the junction box or the "claw" of the clamping mechanisms.

Carefully install the switches in the installation boxes

Gently install the switch mechanisms in the

installation boxes. The sixth step. Apply the frame of each switch and secure it with the clasp from the kit.

Apply the frame of each switch and fix it with a clasp from the kit

Apply the frame of each switch and secure it with the buckle from the

kit. Seventh step. Mount the keys of the switches.

Mount switches

Mounting the switches of the switches

In the end, we need to connect the lighting devices with the wires coming from the distribution boxes, check the correct operation of the system and seal the strobes.

Successful work!

Video - Wiring diagram for the circuit breaker