If in the office or the house there is a need to switch on and off the same lamp from different locations, then you need to consider how to connect the pass button.
This problem occurs if you have a long dark corridor in your house.
If you come into the house from the street, then you need to turn on the light at the entrance door, and turn off the light would be convenient with another switch that is located near the hall, stairs or kitchen.
For the simplest, but also the most inconvenient solution, you can connect an additional light source at the end of the corridor.
Thus, you connect the light near the door, walk along the illuminated corridor, connect another light source, return to the door, turn off the light, go through the corridor already illuminated by the second lamp, and now turn it off.
As you can see, this is an extremely inconvenient situation.
A similar problem occurs in office premises, where there is a corridor without windows, two staircases from different ends of the corridor, the offices are located on the right and left.
Using an ordinary switch in this case is extremely inconvenient, because if a person ascends the staircase near which it is impossible to connect the lighting, then the entire corridor will have to pass in the dark.
If you install a pass-through switch in such a room, you can turn on the light by going up one ladder, and turn it off before descending on the other.
In this case, another person can climb any of the stairs and turn on the light.
Video:
Actually, you can turn on and off the light from any of the passing devices in the circuit, while reconnecting the lighting and turning off the light you have the opportunity from anywhere.
The switch, which allows you to connect and turn off lighting from two or more places, is called the gateway. Let's consider the operation principle of a simple and a transition switch.
Contents:
- Electrical circuit - from simple to through-flow
- Connection of a pass-through switch
- Control of light from three or more places
Electric circuit - from simple to continuous
The most common simple switch closes and opens an electric circuit. The scheme of its connection is quite simple.
Two wires refer to it, referred to as phase and zero, they are fixed by terminals inside the switch.
When the position is "on"( most often to move to this position you need to press the top of the key), the electrical circuit is closed, the current is connected and the light comes on.
Pressing the bottom of the key, the circuit opens and the power supply stops.
The circuit for the correct connection of a simple circuit breaker opens and closes the phase wiring.
This allows you to be sure that when the position is off, there is no current key in the circuit and it is possible, for example, to replace the chandelier. Sometimes management is put on zero postings.
This is entirely acceptable, but then when repairing electrical appliances connected to the network via a switch, you will have to disconnect the automatic devices on the electrical panel.
A simple switch can be a two-key, the essence of it does not change, each of its keys connects and turns off one of the two circuits.
If the wiring diagram uses two simple switches and one light source, then the way we turn on the light, the same we must turn it off, otherwise there will be no light.
It is simply impossible to construct a power supply to a normal switch otherwise.
The feedthrough switch will allow this circuit to be implemented.
As well as normal, the pass-through can be a keyboard and touch, with one, two and three keys.
The key difference between the pass-through and the simple is that the simple one has one input and one output, and the gateway has one input and two outputs.
That is, the breaker does not break the current, but gives it either to one output or to the other.
The wiring diagram does not provide its neutral position and is assembled in such a way that the "off" position of one switch corresponds to the "on" position of the other.
Video:
Similarly, three or more switches can be connected to the system. Only in this case they will be called not pass-through, but change-over.
In video and printed instructions, this fact is often overlooked, and the chain in which the three switches are still called the gateway.
Connection of the pass-through switch
In the video instruction you can see the scheme in which lighting control is carried out from two points in which one-key through-gates switching devices are installed.
From the junction box, zero and ground are sent directly to the light bulb, one phase wire is output to the input of the first switch( the first we call it conditionally, it can be any of the switches, since they work autonomously), the phases of its two outputs through the box are connected totwo outputs of the second switch and the input of the second switch, the phase is output to the light bulb.
The video shows that such a connection scheme allows the circuit to be kept closed when both switches are in the same position( conditionally say, "on" or "off").
The circuit is opened when either switch switches to the opposite of the remaining one.
How to do it practically. The video shows that the installation starts from the junction box. We put into it wires from the shield, the lamp and both switches.
There must be three wires from each input - zero, ground and phase. If you do not have a ground wire, just ignore the mention of it.
However, the wiring coming from the podzheetnikov in the box must be three-core. Zero and ground wire from the box immediately screwed on a light bulb.
Connect the brown power wire to the brown wire of the first pass through the input, and connect the brown wire from the bulb to the brown wire of the second pass through the input.
We use terminals for connecting wires. Blue and yellow-green wiring from the through switches we collect in the box and connect them together.
The junction box is assembled.
Now it remains to make the installation of the pass-through devices among themselves, and the connection scheme will be realized.
Each control switch has a control contact( paired) and two actuators. We bring the phase to the first, as shown in the video.
To do this, we have to connect the brown wires from the box to the control contact, and blue and yellow-green to the executive and insert the switch into the jar.
Similarly, we collect the second pass-through. The work is finished, we check how the connection scheme works.
As a result, you must be able to connect and turn off the light of both the first and second devices in the circuit and be able to turn on first, and turn off the second, and vice versa, turn on the second and turn off first.
We remind you that the names of the first and second in the chain of pass-throughs are conditional names, these are absolutely equal and independent from each other devices.
Control of light from three or more places
This connection scheme includes two pass-through switches, and the remaining ones in the circuit will be flip-flops, essentially being modified two-key ones.
To them from the box will fit a four-wire. Consider how to modify and connect the two-key.
Video:
Let's start by collecting the box and supplying power to the junket. To do this, the blue and yellow-green wire of the first device is connected to the same wiring of the second one.
White-blue and white-black second dual-key connect to the blue and yellow-green of the latter.
Now finalize the two-key, for this from two micro-switches and a pair of segments of white-blue and white-gray wiring, we will collect two plugs.
Now connect the actuating contacts with the forks so that the first plug connects the two executive contacts closest to each other, and the second one connects the two remote ones.
Now you need to mount the switch into the junction box and connect the blue and yellow-green wires to the control contacts.
Connect the blue and white wires to the blue and white plug, and the white-black wires to the white and black plug. Now we put on the connecting strip for the keys to ensure their synchronous operation and check.
All devices in the circuit must turn the light on and off autonomously. Similarly, the fourth switch is connected, if necessary.
The electrical wiring is laid at the initial stage of finishing works.
Video:
In the process of finishing all the electrical wiring will be closed by ceiling or wall plasterboard, and proceed to install lighting only after the wallpaper is pasted.
You can say that you have to connect the system long before you can make sure it works correctly.
If there is no light when the key is on, the connection circuit is not assembled correctly.
Any mistake made leads to the need to cut off the wallpaper, remove the sheets of drywall and do other things to get directly to the wires.
A clear understanding of how correctly to connect the circuit breaker connection is a guarantee that you do not have to redo the repair in search of an error.
