According to which scheme are the cables to switches and sockets laid?
The electrical installation in homes or offices usually follows simple patterns. The pattern in one's own four walls depends, among other things, on whether one lives in an old or a new building and when the power cables were possibly renewed. In old buildings, you will often find so-called junction boxes below the ceilings. In new buildings, on the other hand, there are hardly any of these and the installation is clearer. Thus, a general distinction is made between these three basic forms:
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