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Electrical planning and electrical installation: More safety thanks to new cables
Electrical planning and electrical installation: More safety thanks to new cables
Video: Electrical planning and electrical installation: More safety thanks to new cables
Video: Never Before - Complete Electrical Wiring Of A Home - A2Z Construction 2023, February

Maybe the electrical installation in the house is neglected so often because you can neither hear nor see electricity. But at the latest when building - new construction, expansion, renovation - the copper pipes in the wall deserve increased attention. Because with thorough electrical planning, the quality of living depends on.

Many installations in the building stock are old = " and no longer meet today's standards. Around 10.6 million residential units that were built before 1949 are inhabited in Germany - most of the electrical systems from days long past still work here: protective conductors and residual current circuit breakers are rare.

There is hardly a layperson who is aware of how very modern household appliances burden the old electrical systems. The statistics clarify: smoldering lines and defective household appliances cause up to 15 percent of apartment fires. And there is a fatal relationship: the worse the electrical system in the building, the more often power strips and extensions are used. And they overload the small number of circuits, thus increasing the risk of fire.

Who does not know that: When the washing machine is running, ironing is no longer possible because the fuse will be blown out. What exactly happened? Since both devices are operated on a common circuit, this is overwhelmed. The circuit breaker (fuse) protected the circuit from overload and disconnected the circuit from the mains. With a new installation, multiple devices can easily work at the same time. Because: Each large device gets its own line and protection. Circuits in the more sensitive living areas such as bedrooms and children's rooms can be switched off automatically as soon as all connected devices are switched off - with a mains isolator.

Anyone who renovates or builds a new building has to ask two crucial questions. First, how do I want to use my apartment now? Second, how in the future? The motto here is: If you "save" something now, you can only do it later with great effort.


New devices are constantly coming into the house and you can help yourself with multiple sockets. They rarely look elegant, and improper installation often leads to damage. Better have the electrical professional lay the cables for you.

Photo: fotolia / Pixelmixel

Gone are the days when permanently installed sockets and the associated cable spaghetti restricted personal living ideas. Skirting board systems are increasingly moving into your home with their sophisticated design. A wide range of decors and colors are available, including gray and cream, pure white, brown and beige, beech and maple. Or a noble aluminum decor that fits modern design facilities.

Modern switches and plugs are available in a wide variety of designs. Made of wood, glass, porcelain or plastic, they fit into Mediterranean living spaces, complete the modern interior facade or emphasize the cozy country house style. Functionally, a lot has happened in recent years. For example, Schuko sockets offer special child protection, cut off the power supply before a fault current can become dangerous, and also protect expensive technology from overvoltage.

There are also a lot of electrical appliances in the kitchen: coffee maker, toaster, egg cooker, blender, stir bar and the radio. In order to fundamentally expand the existing electrical installation, the walls would have to be pried open and the cables laid again. Those who shy away from this effort can quickly and easily expand their installation with a sturdy aluminum profile strip. It is screwed onto the wall where there is a power connection. The installation can be vertical or horizontal, depending on your taste and space situation - possibly even barely visible under the top cabinets. Not only can additional sockets for the small appliances in the kitchen be used in the profile strip, but also push buttons and touch dimmers as well as radio wall transmitters.

In order to provide builders and renovators with a binding basis for their planning, the Association for Energy Marketing and Application (HEA) founded the initiative "ELEKTRO +" (Elektro Plus) together with the Central Association for the Electrical and Electronics Industry (ZVEI).. Its aim is to formulate the catalog of standards for electrical installation in apartments so that architects and electrical contractors can access neutral and understandable information. Even builders and buyers of condominiums and homes can have a better say when planning their electrical installation with the information from "ELEKTRO +".


Leave the planning of the electrical installation to the specialist. The more they know about your ideas, ideas and wishes, the more perfect and future-proof the installation will be.

Photo: iStock / frankoppermann

Floor plan as the basis for the electrical installation

The floor plans of a house or apartment form the basis for a new electrical installation. In dialogue with the architect or electrical engineer, the builder determines the scope of his electrical system in the future.

Depending on how a room is to be used and the furniture is to be placed, the concept for the electrical circuits and the arrangement of the switches, sockets, light outlets, communication devices and other comfort and safety functions are created. And if you like to change your seating group in the living room from time to time, it makes sense to install additional sockets and TV connections at suitable points. In the event that the children's room later becomes an office, additional connections should be considered in advance.

It is possible that the blinds will be automatically controlled at a later point in time or that the lighting will be regulated economically and as required using motion detectors. In this case, with good prior electrical planning, hardly anything needs to be changed on the installation. Because: Modern building system technology is a programmable system that only needs one control line. The electrician only has to "reprogram" for new and more extensive tasks.

The more proactively an electrical installation is planned, the more circuits are arranged. They take over the most important part of the power supply to all locations in the house. And what is this useful for? Because there are different supply, protection and security requirements in the respective rooms. One separates the starving artists like lamps and radios from the wolverines like stove and washing machine. Both are fed via different types of lines.

In the circuit distributor, also known as a fuse box, all individual circuits come together and are protected by circuit breakers or automatic devices. These modern automatic circuit breakers serve to protect people and property and can be easily switched on again with a toggle switch when the problem is solved. In old systems, screw locks still do this, which must be replaced every time they are blown.

In addition to the circuit breakers, so-called residual current circuit breakers are used (RCD protection, today also RCD, also called R esidual C urrent D evice). They protect cables and devices and switch off the power automatically as soon as you come into contact with live cables or touch a device with defective insulation. The installation of such residual current protective devices is mandatory for new installations and modernizations of socket outlet circuits.

The planning of the new electrical installation requires an early dialogue with the electrical specialist. The more he knows about the client's ideas, ideas and wishes, the more perfect and future-proof the installation will be.


In the circuit distributor, also known as a fuse box, all individual circuits of the electrical installation come together and are protected by circuit breakers or automatic devices.

Photo: MEV

15 tips for safety and convenience of electrical installation

  1. Specify the equipment value in writing to the architect or electrical contractor - establishes legally binding building performance.
  2. Determine the location of the house connection wall or niche in good time with the local network operator for electricity, telephone, gas, water, district heating.
  3. Consider communication field in the meter cabinet, so future communication technologies can also be used.
  4. Plan enough circuits so that the electrical system will not be overloaded in the future.
  5. Provide reserve spaces in circuit distributors so that expansion is possible.
  6. Plan RCDs for each floor so that the entire house is not in the dark in the event of a fault.
  7. Plan enough sockets, switches and lighting outlets so that flexible use of space is possible.
  8. Install surge protection for the antenna and telephone connections and the associated sockets.
  9. Use childproof sockets.
  10. Relocate separate conduits for TV and telephone from the communication field to the office, living room, bedroom and children's room as well as the office space in order to be prepared for the future world of communication.
  11. Consider junction boxes for hi-fi speakers so that the speaker cables do not trip over.
  12. Install motion detectors for outdoor lighting.
  13. Select intercom with video function for your entrance area.
  14. Smoke detectors for every room in the house.
  15. Install electrically controlled shutters at least for the large windows.

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