A wall socket , or also WCD, is a facility to which equipment that requires electrical energy can be connected. There are also wall sockets that have a different application, such as data transmission or the discharge of vapors and gases from the connected equipment.

When connecting a wall socket in a home installation, it is important to work without tension. You do this by first removing the plug of the relevant group. Or, in the case of an automatic fuse, by converting this fuse. Then check with a voltage tester or multimeter whether you are really working without voltage.

Connect wall socket:


You can connect a wall socket in two different ways: Pulling wires from an existing wall socket or from a so-called junction box. You can see a junction box as a kind of intersection where several wires come together and split. This is where you can get power from your wall socket. For this you need three wires with a thickness of at least 2.5mm��:

• Blue, the neutral wire, which ensures the current discharge.
• Brown, the phase wire, which provides the power supply
• Yellow/Green, earth wire, this is important for the earth leakage circuit breaker to work properly.

Strip these wires with stripping pliers , taking care not to damage the copper core. Then place the wires under the terminals of the wall socket. The earth wire always comes in the middle and is indicated with an earth sign:

Then do the same with the end of the cables at another wall socket or splice them off at a junction box.

What is a switched wall socket

A switched wall socket is a power point with a switch behind it. You often see this in system ceilings to which, for example, fluorescent tubes are connected. This gives you flexibility and allows you to move the light points in the ceiling over time. It is wise to label the wall sockets with ���Switched WCD���.

What is an earthed socket?

An earthed socket is connected to an earth leakage circuit breaker in the distribution box with an earth wire. An earth leakage circuit breaker measures the leakage current and if it exceeds a certain value, the current is cut off. An earth leakage circuit breaker works as follows: If an electrical installation absorbs more current than what it leaves, there is leakage current. This may be due to tension on the housing. With grounded equipment, this current flows away via the earth and the earth leakage circuit breaker will operate. It therefore protects against electrocution and prevents fire in the event of a short circuit.