Purpose And Installation Of The Two-Way Switch

Saving on electricity in pass-through rooms, a two-way switch (DSB) can help. This device allows the equal control of lights from several locations, making the process more comfortable.

When installing the DST it is important to plan the wiring correctly, based on the geometry of the room. Let's get into the specifics of wiring two-way switches together

The contents of this article:

  • Purpose and Types of Pass-through Switches
  • Places of Preferred Placement
  • Design and Operating Diagram of DPW
    • Option #1 - two-zone placement
    • Option #2 - three-zone placement
  • Mounting the junction box
  • Sequence Installation of the ALS
  • Summary and useful video on the subject

Purpose and types of Loop Switches

The essence of the Loop Switches (LO) is the possibility to switch on and off the light bulbs independently from several places. Therefore, the operating scheme of this equipment implies a minimum of two switches.

Functionality of the house-wide switches can have from 1 to 3 keys, each key being an independent regulating mechanism from the others.

Purpose and installation of the two-way switch

The front panel of the feed-through switch can be equipped with LED backlights for better visibility of the keys in the dark

The different toggle switches control different light circuits, so specifically DPVs are designed for chandeliers or lamps with two electric circuits.

The number of wires involved in the circuit increases dramatically with increasing lighting control points. Because of this two or three light switches per luminaire are the rule in domestic installations.

The SP interface can be divided into:

  • mechanical;
  • sensor;
  • remote.

The last are rarely used because of impracticality, but can be found in the stores. The good thing about the touch-sensitive switches is that any touch triggers a switch on and off alternately. But the mechanical keys are more familiar to a person and allow a tactile experience of changing the position of the rocker switch.

Purpose and installation of the two-way switch

The rear panel of the rocker switch has a wiring scheme that allows you to connect the wires correctly without getting mixed up

The visual design of the DIP switch could be very different. In electrical equipment stores, you can choose the right color, shape and design for your needs. The functionality is not influenced by the appearance of the device.

Preferred locations

The feed-through switches can be installed in any handy location. It is not necessary to use both devices to control the light at all times. One can be the main switch and the other only used if necessary.

Purpose and installation of the two-way switch

If conventional light switches have been installed in a corrugated cable, it is possible to replace them with light switches without damaging the walls

Broadway switches are preferably installed in these places:

  1. In opposite ends of a long corridor. If there is an extra door in the middle you can also place an end switch near it.
  2. In the big bedrooms. One DPW can be placed classically on the wall near the door and another by the bed.
  3. On stairways.
  4. On paths and walkways of houses, cottages, cottages. It is convenient to leave the house in the evening, walk through the illuminated alley and turn off the light near the front gate.
  5. In large halls with several entrance doors on opposite sides.

The pass-through switch both saves electricity and ensures the safety of human movement. The only disadvantage of this device is the increased complexity and expense of the initial installation.

Break switch design and operating diagram

Break switch is more correctly called a switch because it has no defined position at which the voltage to the lighting fixture is applied. Key markings do not have the standard on/off inscriptions or stick and oval icons. Usually there are only two arrows on the switch, which indicate the dual purpose of the toggle switch.

Purpose and installation of the two-way switch

If in doubt about the correct wiring, it can be checked with a multimeter by connecting an ordinary battery to the input of the distribution box

Unlike the standard two push-button switch with one input and two outputs, the DPW is a symbiosis of two independent single push-button circuits in one housing. The dual pass-through switch provides separate control of two lighting circuits. Each electrical circuit can be closed independently from any of the 2 or 3 devices.

The dual-positioned circuit of the DPW is convenient to consider using one pair of toggle switches as an example. One supply wire comes to the switch from the junction box, and two supply wires come out of it. Depending on the position of the key, one of the wires will be energized. Both wires go to a second switch, and one wire goes out to the light fixture.

In this way, switching any key causes one circuit to open and the other to close. As a result of this action, the light that is turned off is turned on and the light that is on is turned off.

Purpose and installation of the two-way switch

The complexity of the circuitry of a pass-through switch does not affect its reliability. The probability of breakdown of such a system is minimal if safety is respected

The example given shows that three wires should run from each toggle switch to the junction box, that is, a total of six wires from each DPW. And as many as eight wires go to the central transfer switch for three-zone control. All of this must be considered when planning the wiring in the house.

Option #1 - two-zone layout

The installation of the tap changers should preferably be done before the interior finish of the room.

Because the installation and wiring diagram of the two-way switch requires four strips:

  1. One from the power source to the junction box.
  2. Two from the distribution box to the SP.
  3. One from the box to the light sources.

After drilling the walls it is necessary to determine the number of cables and the number of wires required.

Purpose and installation of the two-way switch

After plastering the walls, it is important to remember the location of all wires so that when drilling holes in the walls you do not bump into them

Two three-core or three two-core wires must be laid between the junction box and the first FDR. Two wires will be used to energize the switch and the other four will follow through the junction box to the second switchgear.

To the second DPW, three two-core wires are laid in a grommet. Two wires go to the lighting fixtures and the other four to the first switch.

One or two wires with \"zero\" can be run to the lighting fixtures. The specific number of wires depends on the power consumption and the convenience of connecting the lights in parallel. A normal two-core supply wire fits to the junction box itself.

The main task when installing the PV is to connect the cables correctly in the junction box. It must be large enough to hold at least 16 wires. If you do the work slowly and test all connections with a multimeter, you will end up with a workable electrical circuit.

Option #2 - Three Zone Placement

Independent three zone control of two lighting circuits differs from the two zone above by having a special cross switch. It is placed exclusively in the middle of the circuit, although it has the same functionality as the other two DIPs.

Purpose and installation of the two-way switch

To ensure that the multilevel wiring does not interfere with further repairs, it is tried to be wired 15-20 cm below the ceiling

The double cross switch has an unusual design, containing a transit contact. One of the wires coming from the first switch is always connected to it, regardless of the position of the toggle switch. It closes at both positions of the crossover DPW, which makes the entire electrical circuit work.

The middle crossover switch is not interchangeable with the outermost devices. An infinite number of such intermediate devices can be added to the scheme in question, increasing the number of on/off control zones in the room. But increasing the complexity of the circuit entails increasing the number of necessary wires and wall conduits, which will not add to the joy of self-wiring.

Purpose and installation of the two-way switch

Wiring is not much more complicated if the number of control zones increases, but the number of switches must be considered when choosing the size of the distribution box

To install an additional DPW, another cable routing groove must be made from the distribution box. In this groove you need to put 8 wires: 4 going to the first switch and 4 to the second switch.

If the installation is done by a professional and it is financially possible to install all the switches, then using a three zone controlled expansion joint is an excellent choice.

Installing the junction box

All the wires used for the installation of the tap changer must be concentrated in the junction box. This reduces the number of conduits and facilitates maintenance of the wiring if the number of fixtures or the pattern of switching is changed.

It is advisable to place the junction box between the two limit switches at the level of the lighting fixture in the center of the room. However, the final choice of mounting location is based on the specific room configuration and electrical circuitry.

Purpose and installation of the two-way switch

Self-connecting terminals provide a tight connection whose strength does not change over time. They are safe and easy to use

The worst way to connect wires in a distribution box is the usual twisting with duct tape. This method can cause the insulation to heat up and then catch fire. The best way to connect the wires is to use special terminals because they allow for easy installation and maintenance.

Sequence of steps when installing a DCB

Self installation of a two-way switch requires not only prior theoretical preparation, but also knowledge of the installation process. It is important to do all the processes in one go, without having to rework anything due to missing a step. The following will be described step by step instructions for the installation of a double zone DPW.

Step #1: Design. This step involves the following steps:

  1. The general wiring diagram is drawn.
  2. The location of the junction box is determined with maximum savings on wire lengths.
  3. Calculates the meterage of the necessary electrical cables and their type.
  4. The choice of the place for the switches for user comfort.
  5. The choice of the flush or surface mounting.

Design the Wiring Department by yourself on a sheet of paper. There should be no problem, because detailed analogous schemes are available on the internet.

Step #2: purchasecables, switches, junction box elements. It is better to buy solid wires so that you can bend them easily in the sockets

Purpose and installation of the two-way switch

There should not be too many wires in the sockets so that they do not bend or squeeze when you fix the switch

Step #3: Installing the junction box. It is from this you must begin to lead the wire to the other devices. The junction box is located 15-30 cm from the ceiling in a visible place. It must be connected to the mains only after the complete assembly of the system.

Step #4: Installing wall sockets and preparation of fixtures for lighting equipment.

Step #5: Measuring cable lengths between electrical circuit points and cutting off necessary pieces. A reserve of 10-15cm must be made for each appliance. Wires are placed in corrugated or cable ducts so that they are not exposed to moisture during floods and wallpapering.

Purpose and installation of the two-way switch

Casing protects the wires from a short circuit if the unexpected flooding of the wall or rainfall eliminates the need to search for a break in the entire stove

Step #6: Connect the cables, switch box, switches and lamps into one system. A wiring diagram must be shown on the back of the DPA, which must be observed. When finished, use a multimeter to check that all system components are operational.

Metallic parts of the luminaires must be earthed. Failure to do so may result in an electric shock.

Step #7: Connecting to mains and testing.

When the system has been successfully tested it is possible to disconnect the apartment and start the renovation: patching, closing the distribution box.

According to the described algorithm, installation can be done quickly and without mistakes.

Summary and useful video on the subject

The above videos show the real environment in which the feed-through switches operate, allowing the user to appreciate their ease of use.

The video shows the wiring diagram of three-way switches:

Two-way switch wiring diagram:

Interactive two-way two-way switch operating diagram:

It is not difficult to connect two-way switches yourself in the house. It is important to clearly follow the connection scheme and follow the described algorithm of actions. The result of successful work will be money saved on electricity and the comfort of the tenants in the regulation of lighting.

You have personal experience in the installation of two-key loop switches? Please give some good advice to novice home handymen. Tell me the details of installation that only you know. Leave your comments in the box below the article.


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