Electrical wiring diagram for two way switch


In this tutorial, we will learn about a simple yet interesting concept called the 2 Way Switch. It is also called as a Staircase Switch, as you can control a single load, like a light bulb, from two different places, like either end of a staircase.

It is not a user guide on how to install or wire a 2-way switch. If you are planning to implement a similar setup in your home, then definitely consult a professional as the process involves working with V AC Supply or V AC, depending on where you live.

As I have already mentioned in the introduction paragraph, a two way switch is very useful in staircase lighting as you can turn on the light just before you start to climb the stairs and once you reach upstairs, you can turn off the light simply by toggling the switch placed near the top of the staircase.

There are a couple of ways in which you can make a two-way switch connection. One is an older method, which is not often used now-a-days and the other is a more modern and safer version which is being implemented in industrial as well as residential applications. Let us take a look at both these wirings. Before proceeding, an important component called a Two-Way Light Switch is the main element of the 2 Way Switching, irrespective of the type of wiring used.

It is a standard single pole switch with three terminals. The following image shows the front and back view of a typical household two-way switch. The first way of wiring uses a couple of Two-Way Light Switches with a 3-wire control.

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The following is the simple schematic of a three wire 2-way switch wiring. You can observe in the schematic that both the COM terminals are connected together. The L1 terminals of both the switches are connected to line or phase or live of the AC Supply. The L2 terminals of both the switches are connected to one terminal of the light bulb while the other terminal of the light bulb is connected to neutral of the AC power supply.

From the schematic, you can easily visualize how the wiring works. In the state shown in the above image, the light is off. If either of the switches is toggled, the light turns on. To turn off the light, you can toggle the other switch.

When we compare this setup with digital electronics, then this is similar to an Ex-OR Gate, where the status of the light on or off depends on the COM terminals of terminals of both the switches connected to respective L1 and L2 terminals.

Switch 1 COM. This method is recommended as both the line and neutral wires come from the same lighting circuit or breaker even though it uses more wire. The next wiring design is an old system which you might find in some older homes and industrial settings. It is also called as two wire control wiring.

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This wiring system is not recommended for modern implementations and if you are planning to install a new setup or replace an older one, then the previous wiring must be used. I have included the alternative wiring method just as a reference and I will also explain its drawbacks. Coming to the actual wiring, the following schematic shows the implementation of a two-wire control two-way switch. L1 terminals of both the switches are connected together and L2 terminals of both the switches are also connected together.Wiring Diagram for A Two Way Switch — wiring diagram is a simplified customary pictorial representation of an electrical circuit.

It shows the components of the circuit as simplified shapes, and the capacity and signal connections amongst the devices. A wiring diagram usually gives suggestion virtually the relative tilt and accord of devices and terminals upon the devices, to encourage in building or servicing the device. A pictorial diagram would behave more detail of the innate appearance, whereas a wiring diagram uses a more figurative notation to put the accent on interconnections higher than mammal appearance.

A wiring diagram is often used to troubleshoot problems and to make clear that every the friends have been made and that anything is present. Architectural wiring diagrams statute the approximate locations and interconnections of receptacles, lighting, and unshakable electrical services in a building. Interconnecting wire routes may be shown approximately, where particular receptacles or fixtures must be on a common circuit. Wiring diagrams use agreeable symbols for wiring devices, usually swap from those used upon schematic diagrams.

The electrical symbols not only acquit yourself where something is to be installed, but plus what type of device is mammal installed. For example, a surface ceiling lighthearted is shown by one symbol, a recessed ceiling spacious has a substitute symbol, and a surface fluorescent well-ventilated has choice symbol.

Each type of switch has a stand-in tale and so pull off the various outlets. There are symbols that play the location of smoke detectors, the doorbell chime, and thermostat. A set of wiring diagrams may be required by the electrical inspection authority to accept connection of the address to the public electrical supply system. Wiring diagrams will in addition to enhance panel schedules for circuit breaker panelboards, and riser diagrams for special facilities such as blaze alarm or closed circuit television or extra special services.

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Reject Read More. Necessary Necessary.In this tutorial, we will show you how to make 2-way switching connection. We have explained both the methods below and both the methods are demonstrated in the Video given at the end of this article.

This is the first method to make a 2-way switching connection, this is the old method. If you are going to install a new one then go for three wire control method. One end of the bulb is connected with the Common Terminal of second switch and other end of the Bulb is connected with Neutral line of AC power supply. The condition of getting Output in ON condition is same as the Ex-nor gate truth table which is given below:.

This is the new method to make a 2-way switching connection as it is slightly different from the two wire control method. This method is commonly used now days as it is efficient than the Two Wire control system. As you can see in the Schematic Diagram of 2 way switch circuit belowthe common of both the switches are short-circuited. The condition of getting Output in ON condition is same as the Ex-or gate truth table which is given below:.

It's a age old logic but still a mesmerizing thing to people who doesn't belong to this domain. Thanks for explaining it so clearly. In the electrician's trade, the two switch location load control is termed a '3-way' system. The wiring schematic conforming to the adopted International Code Council requires a different physical configuration for safety compliance than what is demonstrated in this article.

Thankyou so much. I like it. Thank you for this acticle. You solved a problem for me. Does anyone know how to do this with an led mech like the clipsal 30PBL? I'd like the mech led off when that switch is powering the light.

It is a good explaination thanks. Get Our Weekly Newsletter! Helena St. Related Content. What is Power Transformer and How does it work? Log in or register to post Comment.Thank you. Please keep Going. Are you scratching the head and stuck with your QuickBooks related issues, you're going to be just one click definately not our expert tech support team for your QuickBooks Support Phone Number USA related issues.

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Wiring Diagram for A Two Way Switch

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electrical wiring diagram for two way switch

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electrical wiring diagram for two way switch

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Even for small companies we operate. This technique is wonderful for a medium-sized company.How to wire a 2 way switch. Wiring a 2-way switch is about as simple as it gets when it comes to basic house wiring. First of all we need to go over a little terminology so you know exactly what is being discussed. It should also help in understanding the functions of each type of switch. The cable consist of a black wire, a white wire and a bare copper wire.

When wiring a 2-way switch circuit, all we want to do is to control the black wire hot wire to turn on and off the load.

How To Wire a 2 Way Switch

Now in the diagram above, The power source is coming in from the left. Notice the black wire is the only wire that we are controlling through the 2-way switch. You have an incoming hot wire black going to one screw it does not matter if you use the brass or silver screw on the side of the 2-way switch and a black wire from the other screw on the 2-way switch going to the load light, ceiling fan etc.

The white wires are wire nutted together so they can continue the circuit. Now as for the ground wire. It is very important to connect the ground wire to the switch as well.

The Green screw on the 2-way switch is for the ground so all ground wires should be connected as seen below.

electrical wiring diagram for two way switch

All ground wires bare copper are all now connected incoming ground, load ground and switch ground. This makes for a safe protected circuit by having all grounds intact. So what have we accomplished.

How a 2 Way Switch Wiring Works?

By wiring a 2-way switch, The circuit below shows the basic concept of electricity flow to the load. Let's assume the load you are controlling is a light. The electricity flows from the hot wire black through the 2-way switch shown in off position and then to the light and returns through the neutral wire white. This is a completed circuit. Now by understanding the diagram above, go up to the top diagram and by using the concept shown here, just use your mouse pointer on that diagram and follow the flow from black wire hot wire to the load and return through the white wire neutral.

This should give you a good basic understanding how the 2-way switch circuit works and will help you in adding or changing a 2-way switch. So now that you have a basic concept of wiring a 2-way switch, let's look at the following 2-way switch diagrams to see which type of circuit scenario you have.

After you have pulled your switch out from the wall, the wires in the box and connecting to the switch should look like one of the following. How To Wire It. Here's How.Read detailed information about index mutual funds with some of the lowest expense ratios in their categories, and learn about their pros and cons.

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electrical wiring diagram for two way switch

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