I put it back and forth

I put it back and forth

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Used to turn on the light at the entrance of a room, the back-and-forth allows you to turn it off at another place in the same room. It is very useful or even essential in certain cases: at the bottom and at the top of a stairwell for example! Installing a back-and-forth does not require great electrical skills: a few tools and a little elbow grease are enough. No need to be a light!

Step 1 - I prepare my material

To install a back-and-forth, I need two switches, a wire cutter, wire stripper, a flat screwdriver and a Phillips screwdriver. Of course, you will need the cable needed to connect the two switches and the lamp.

Step 2 - I turn off the electrical installation

First of all, I must turn off the existing electrical installation. For safety, it is better to cut the general circuit breaker.

Step 3 - I locate the phase wire on the table

I need to find a location on the pre-wired electrical panel. I choose a wire start that we call plot. In general, we put a red wire for the phase. On the board, the neutral is on the left. The phase is therefore on the right at the output of the differential. On the disassembled switch, the phase is marked with the letter L.

Step 4 - I bring the phase of the table to switch 1

I pull the phase wire from the electrical panel to the first switch. Depending on the progress of my work and my immediate needs, I install ducts through which the wires will pass. If necessary, I can seal them. Here, the back and forth concerns a stair climb. The ducts pass through the floor, they will be hidden by the wood covering on the wall.

Step 5 - I connect the shuttle phases

Then connect the wires that correspond to the shuttles between the two switches. For your convenience, before passing the wires through the sheaths, I don't forget to strip the different wires, using the wire stripper, over 2 to 3 cm. This stripped part will be used for fixing in the switch housing.

Step 6 - I choose the color of the wires

The color of the wire does not matter for these shuttles, but I must avoid the red which serves as phase, and the yellow green which serves as earth connection for electrical appliances. However, I have to choose two separate colors to be able to spot them. I can for example choose black and orange.

Step 7 - I connect the phase wire to the lamp

On the second switch, I start a phase wire (on the pad marked L), to power the lamp. Here it is a "neon" tube.

Step 8 - I connect the lamp to the board

The lamp has two studs which correspond to an input and an output. Using the output terminal, I connect the lamp to the neutral of the switchboard.

Step 9 - I reassemble the switches

I can now clip the cover into the switch box
Then I put the final cover. This is a waterproof switch.

Step 10 - I fix the switches on the wall

Depending on the progress of the work and its nature, this phase is at the end of my work. If the housing is recessed at the start, this will not interfere, provided you have provided the passage of the wires.

Step 11 - I put back the circuit breaker and I test my installation

After completing the installation of the switches, I can turn on the power to verify that the back-and-forth works and I close the power panel. I switch on with switch 1 and I switch off with switch 2 and vice versa. If it works, I have successfully completed my circuit!


  1. Fonteyne

    Does distance learning work at all? is it recruited?

  2. Tas

    The fun information

  3. Mezisida


  4. Vozahn

    let's discuss it.

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