What is Two Way & Three-Way Switching Circuits?
Two-way switching or (three-way circuits in the US) connection is used to control electrical appliances and equipment like fan, lighting points etc. from different places using 2-way & 3-way switches. The most common use of 2-way switching connection is staircase wiring where a light point can be controlled from two, three or even many locations. No matter what is the position of flowing electric current in the two way switch (ON or OFF), the connected appliance like bulb can be switched ON / OFF by pressing the button.
Construction & Working of a 2-Way & 3-Way Switch
How to Wire a 2-Way Switch?
Below is a given schematic wiring diagram that shows how to wire a 2-way (or Three-Way – US) switch and control a light bulb from two different places.
How to Control Light from Two Places?
The following two way switching connection can be used for the same purpose as mentioned above in fig 1 i.e. to control a light point from two different places by using 2-way switches
The following wiring shows to control a light bulb from two different locations using SPDT switches also know as 3-Way switch in NEC and 2-Way switch
Additionally, you may use two 3-way combo devices (3-Way switch & outlet) to control a light bulb from two places (NEC – US) as follows where (both outlets are always on.)
Moreover, you may use a combination of Double three-way switches to control a single or two light bulbs from two locations as shown in the following diagram:
Two Way Switching to Control Light from Two Places in Staircase
As we discussed above, that the most common use of 2-way switches is to control a light point from different places like upper and downstairs i.e. lower entering door and upper door. This circuit is shown below:
What is Two Way & Three-Way Switching Circuits?
Two-way switching or (three-way circuits in the US) connection is used to control electrical appliances and equipment like fan, lighting points etc. from different places using 2-way & 3-way switches. The most common use of 2-way switching connection is staircase wiring where a light point can be controlled from two, three or even many locations. No matter what is the position of flowing electric current in the two way switch (ON or OFF), the connected appliance like bulb can be switched ON / OFF by pressing the button.
Construction & Working of a 2-Way & 3-Way Switch
How to Wire a 2-Way Switch?
Below is a given schematic wiring diagram that shows how to wire a 2-way (or Three-Way – US) switch and control a light bulb from two different places.
How to Control Light from Two Places?
The following two way switching connection can be used for the same purpose as mentioned above in fig 1 i.e. to control a light point from two different places by using 2-way switches
The following wiring shows to control a light bulb from two different locations using SPDT switches also know as 3-Way switch in NEC and 2-Way switch
Additionally, you may use two 3-way combo devices (3-Way switch & outlet) to control a light bulb from two places (NEC – US) as follows where (both outlets are always on.)
Moreover, you may use a combination of Double three-way switches to control a single or two light bulbs from two locations as shown in the following diagram:
Two Way Switching to Control Light from Two Places in Staircase
As we discussed above, that the most common use of 2-way switches is to control a light point from different places like upper and downstairs i.e. lower entering door and upper door. This circuit is shown below:
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