on video Two way switches connection with one led blub.

 Two way switching for lighting.

The two way switching used to control a load, like lighting system from two different locations.

In this case, this person is going upstairs, and need to switch on the light, he will switch on from downside, and when reaching upside, he had to keep the light on, until going down again.

The two way switching allowing this person to control the lighting from the two ends, which will save energy and efforts.

Also two way switching, could be used when more than one entrance and exit are available in the same room.

Normally the bulb lights up when electrical current passes throw it.

And the main function of any switch is to control the current flow, so it will control when the bulb will be on and when it will be off.

For a normal switching process.

In the normal switch, you will find two terminals on the backside.

It's normally open contact, if you checked with multimeter, it will show open loop.

If you flipped the switch, and made it on, the contact will be close.

That means, if we connected the neutral wire to the bulb, and the line connected to the switch input, the switch output will be connected to the other bulb terminal.

The bulb will not light up unless someone flips the switch.

And to switch off the bulb again you need to go back to the same switch, and flip it again.

The two way switch from the front side, it looks the same as the normal switch, but from the back side you will find three terminals, one is called common, and the others are called L1 and L2.

We can consider the common as an input, L1 and L2 as an output.

If you check with your multimeter, you will find that the common one is always closed with one side, and open with the other side.

By flipping the switch, the status of the two contacts will be changed.

The common will be closed with the other side, which will allow you to change the current flow passing each time you are switching.

To wire the circuit.

We have 2 different ways to make the connection.

Method one, and it is the simplest way.

We have the bulb, its first terminal connected directly to the neutral wire, and waiting for the line to light up.

These are our two switches.

Connect the line to the common of the first switch.

Connect the bulb second terminal to the common of switch number two.

To make the connection between the two switches.

Connect L1 from switch number one to L2 from switch number two.

Connect L2 from switch number one to L1 from switch number two.

For safety, the connections between the two switches must be done with the same cable color as used in the line connections, follow the standard color code used in your area.

For example, if in your area the brown cable is used for the line connections, the connections between the two switches also must be done with brown cables, because it could be live anytime.

At the moment the electricity can pass through switch one, but switch two breaks the circuit.

Now flip switch two, the circuit is completed and the bulb will light up.

Flip switch one, the bulb turns off because the circuit is broken again.

At the moment the switch one common is connected to L2.

Electricity available at switch two L1.

If we flipped again any switch, one or two the bulb will light up.

Each time you will flip a switch the bulb status will be changed, from off to light up and vice versa.

Method number two.

Connect the line to switch one L1.

Connect switch one L2 with Switch two L2.

Connect both common terminals together.

Connect switch one L2 with switch two L1.

And to complete the circuit, connect switch one L2 to the bulb.

If you flipped any switch the bulb will light up.

After that each time you will flip a switch, the bulb status will be changed.

 Two way switching for lighting.

The two way switching used to control a load, like lighting system from two different locations.

In this case, this person is going upstairs, and need to switch on the light, he will switch on from downside, and when reaching upside, he had to keep the light on, until going down again.

The two way switching allowing this person to control the lighting from the two ends, which will save energy and efforts.

Also two way switching, could be used when more than one entrance and exit are available in the same room.

Normally the bulb lights up when electrical current passes throw it.

And the main function of any switch is to control the current flow, so it will control when the bulb will be on and when it will be off.

For a normal switching process.

In the normal switch, you will find two terminals on the backside.

It's normally open contact, if you checked with multimeter, it will show open loop.

If you flipped the switch, and made it on, the contact will be close.

That means, if we connected the neutral wire to the bulb, and the line connected to the switch input, the switch output will be connected to the other bulb terminal.

The bulb will not light up unless someone flips the switch.

And to switch off the bulb again you need to go back to the same switch, and flip it again.

The two way switch from the front side, it looks the same as the normal switch, but from the back side you will find three terminals, one is called common, and the others are called L1 and L2.

We can consider the common as an input, L1 and L2 as an output.

If you check with your multimeter, you will find that the common one is always closed with one side, and open with the other side.

By flipping the switch, the status of the two contacts will be changed.

The common will be closed with the other side, which will allow you to change the current flow passing each time you are switching.

To wire the circuit.

We have 2 different ways to make the connection.

Method one, and it is the simplest way.

We have the bulb, its first terminal connected directly to the neutral wire, and waiting for the line to light up.

These are our two switches.

Connect the line to the common of the first switch.

Connect the bulb second terminal to the common of switch number two.

To make the connection between the two switches.

Connect L1 from switch number one to L2 from switch number two.

Connect L2 from switch number one to L1 from switch number two.

For safety, the connections between the two switches must be done with the same cable color as used in the line connections, follow the standard color code used in your area.

For example, if in your area the brown cable is used for the line connections, the connections between the two switches also must be done with brown cables, because it could be live anytime.

At the moment the electricity can pass through switch one, but switch two breaks the circuit.

Now flip switch two, the circuit is completed and the bulb will light up.

Flip switch one, the bulb turns off because the circuit is broken again.

At the moment the switch one common is connected to L2.

Electricity available at switch two L1.

If we flipped again any switch, one or two the bulb will light up.

Each time you will flip a switch the bulb status will be changed, from off to light up and vice versa.

Method number two.

Connect the line to switch one L1.

Connect switch one L2 with Switch two L2.

Connect both common terminals together.

Connect switch one L2 with switch two L1.

And to complete the circuit, connect switch one L2 to the bulb.

If you flipped any switch the bulb will light up.

After that each time you will flip a switch, the bulb status will be changed.