fbpx
Electrical Wiring InstallationHow To

2 Way Switch – How to Control One Lamp From Two or Three Places?

2-Way Switching Connection – Electrical Wiring Diagrams

What is Two Way Switching ?

Two way switching connection is used to control electrical appliances and equipment like fan, lighting points etc from different places by using 2-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 current position of two way switch (ON or OFF), the connected appliance like bulb can be switch ON / OFF by pressing the button.

Construction & Working of a 2-Way Swicth

2-Way switch is also know as Single Pole Double Through (SPDT). The basic construction and working principle of 2-way switch is illustrated in (fig 1) below.

Construction & operation of two way SPST (Single Pole Double Through) Switch
Construction & operation of two way SPDT (Single Pole Double Through) Switch

How to Wire a 2-Way Switch

Below is a given schematic wiring diagram (fig 2) that shows how to wire a 2-way switch and control a light bulb from two different places.

Staircase wiring diagram - How to control a lamp from two different places by two 2 way switches

Note:

  • The same purpose can be achieved by using the following two way switching connection in fig 3 as well.
  • Connect the Earth Wire to the connected electrical appliance as well as switches as per electrical regulation in your area.

How to Control Light from Two Places by using 2-Way Switch?

The following two way switching connection can be used for the same purpose as mention above in fig 1 i.e. to control a light point from two different places by using 2-way switches

2 way light switching

How to Control One Lamp From Three Places by 2-Way Switches?

In fig 4, the wiring diagram shows how to control a light point from three different places by using two 2-way switches and an intermediate switch.

How to Control a bulb from three places by using two 2 way switches and intermediate switch

Fig 5 shows the same connection to control a light point from three places by using different symbols.

How to Control a light point from three different places by using two 2 way switches and intermediate switch

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:

Staircase wiring circuit diagram - How to control a lamp from two different places by two 2-way switches?

How to Control a Light from Six Places

Below is a given wiring diagram which shows how to control a light point from six different places by using two 2-way switches and four intermediates switches. Note that you may control even more light bulbs by adding more intermediate switches in the middle of the circuit.

Applications of 2-Way Switching

  • It is used to control electrical equipment and appliances from two, three or even more different locations by adding more intermediate switches.
  • It is also used in staircase wiring connection where a light point can be control from two or more different places.
  • It is used in large area rooms having two or more entry and exit doors and gates.
  • The main purpose of 2-way switching is to control an AC or DC electrical appliance, device or equipment especially light points from two places.

You may Also read:

PCBJLCPCB - Prototype 10 PCBs for $2 + 2 days Lead Time
China's Largest PCB Prototype Enterprise, 300,000+ Customers & 10,000+ Online Orders Per Day
Inside a huge PCB factory

Tags
Show More

Electrical Technology

All about Electrical & Electronics Engineering & Technology. Follow , Facebook , Twitter , Instagram, Pinterest, YouTube, & Linkedin to get the latest updates or subscribe Here to get latest Engineering Articles in your mailbox.

9 Comments

Leave a Reply

Your email address will not be published. Required fields are marked *

Close
Close

Adblock Detected

Please consider supporting us by disabling your ad blocker