How to wire an outlet?

Instructions on how to connect an electrical outlet!

What is the maximum number of sockets on a circuit ? Which cable is required to connect a socket ? How do you connect an electrical outlet? With step-by-step instructions, this article will tell you how to make a secure connection. If you have any doubts despite the instructions, have the work on the electrical system done by a specialist.

How many sockets on a circuit?

In the past, it was not uncommon for a total of two to three light and socket outlets to be provided for an entire residential building. This is unthinkable today with the large number of household appliances.


When installing the house , care should therefore be taken not to have too many sockets on the same circuit. The guideline is a maximum of 4 to 5 double sockets or 6 to 7 single sockets. Each room should (if possible) be extra secured. Of course, this also depends on the power that will be connected later. If this is not yet known, it is better to plan one more circuit.

Devices such as washing machines, dishwashers or microwaves should also be laid separately and secured.


Also read this article how to sharpen scissors

Which line or which cable is required?

Each 230V Schuko socket must have at least 3 wires (NYM cable 3 × 1.5 mm² or wires in the pipe). A protective conductor ( green yellow ) must be carried along. The cable cross-section should be at least 1.5 mm². The line should be protected by means of a B10A circuit breaker. With a feed line cross-section of 2.5 mm² for the socket, the line should be protected by means of a circuit breaker B16A.


  • Protective earth conductor must be “ green yellow ”.

  • The outer conductor, also called “phase”, should be black or brown .

  • The “neutral conductor” has the color blue .


Connect the socket:

Important - once again de-energized using a voltage tester  measure up.

The connection wires should be prepared in the switch box so that they are still 12-16 cm long.


Today there are almost only sockets with plug-in connection terminals. In the past, however, the sockets had screw terminals and had to be tightened with a screwdriver. The plug-in terminals have proven themselves today because you can connect them much faster.


Before stripping the wires, the wires should be very straight at the terminal point and not have any bends. If a wire is slightly bent, the terminal point may not hold or be unsafe, which could result in scalding (risk of fire).

Carefully strip the three wires ( green, yellow , blue , black ) to 10 mm with the wire stripper and be careful not to damage the inner copper wire (a small notch on the wire through the wire stripper is enough to break it).


First plug the protective conductor (green-yellow) onto the protective conductor terminal in the middle.

Extra tip: Before connecting the sockets, make a straight line with a pencil and a spirit level, 4 mm above the flush-mounted socket. This gives you an exact orientation when attaching the socket * and it sits perfectly straight the first time.

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