Multiway switching

The AC circuit, hall or hotel circuit circuit is in electrical installation to " consumers ", usually one or more lamps from two positions on or off. It is used in small corridors, hallways and rooms with two entrances. For the circuit requires two -way switch, available commercially under the designation off toggle switch (pure breaker are produced by most manufacturers only for the Eastern European and Asian markets ).

General

The outer conductor (L ) is connected to one of the two way switch at terminal L (for older switches P). Often this contact is in a different color (eg red). (Shown in the drawing white) The same applies to the wire that goes from the second toggle switch to the luminaire. This vein is often called " lamp wire ", but this is technically not entirely correct. The colors used in the drawing for the wires are not mandatory. The protective conductor (PE ) has green-yellow in Germany according to the valid VDE standards and the neutral conductor (N) be light blue.

By separating the two corresponding one ( in the drawing, the purple veins ) and connect the four wire ends to an intermediate switch can extend the AC circuit to a cross connection ( three switching points or more).

Circuit

The four possible combinations of the changeover switches A and B in a circuit:

More versions of the AC circuit

• AC circuit with indicator lights
• Saving switch schemes: Saving circuit: If one or more sockets are mounted under the switches, one core is saved.
• Hamburger circuit is not allowed according to VDE 0100: Here the neutral conductor is connected in order to save a vein.

According to VDE unacceptable variations

Depending on the structure, there is a alternating arrangement of two corresponding outer conductor and a switched or a continuous current leading outer conductor. So if you want to install at various points between the two switching points, lighting and outlets within the AC circuit, you would need - counting neutral conductor and protective conductor - six cores. Usually, however, only five-core cables are laid. If you were to now still install an electrical outlet, would be possible only on the L1 ( outer conductor ) side, otherwise it would only be possible with the classic zeroing ( PEN conductor ). This is not allowed under the VDE.