What are the color codes for the wiring

Colors of cables and wires

Color coding for cables and wires

In January 2003 the wire color "gray" was introduced and has been binding for electrical installations since 2006 according to DIN VDE 0100-510. But don't panic! Anyone who renovates or refurbishes does not have to completely renew or change the existing electrical installation! Every renovator of his electrical installation has to determine the function of the individual wire colors in an initial test. Use this to make the other connections.

IMPORTANT It is not without reason that the installation of electrical systems is one of the master crafts in Germany. This means that the electrical installation must be carried out by a master company. Anyone who, as an experienced do-it-yourselfer, would still like to carry out some of the work from the electrician trade should definitely coordinate this with a specialist company in advance.

Basically: the assignment of colors according to DIN VDE 0100-510 must be adhered to as far as possible. When expanding existing electrical systems, the new standard is to be applied from the point of expansion. This standard does not specify which color is to be assigned to which conductor marking (L1, L2, L3). However, the most common assignment used so far is: L1 = black / L2 = brown / L3 = gray.


For all versions, according to DIN VDE 0100-510, the protective conductor (PE) must be continuously green-yellow without exception! The neutral conductor (N) has the color coding light blue throughout.

From the extension point of the electrical installation, different colors may have to be connected to one another. There is no specification as to which color is to be associated with which.

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Color coding

The cores of cables or lines with two to five cores must have a color coding according to DIN VDE 0293-308. This applies to all cables or lines in electrical installations, such as sheathed cables such as NYM or cables such as NYY or flat cables such as NYIFY - also in flexible designs.

Furthermore, DIN VDE 0100-510 stipulates that the cores of cables and lines with more than five cores must be identified by numerical characters or colors. According to DIN EN 60446 (VDE 0198) the following colors are allowed: black, brown, red, orange, yellow, green, blue, violet, gray, white, pink and turquoise.

For core cables of type H07V-U or H07V-K, the same requirements as listed above apply according to DIN EN 50525-2-31. Core lines that are used as outer conductors, such as in electrical installation pipes, wiring ducts or distribution boxes, may be marked in brown, black or gray. For a three-phase circuit, however, all three conductors may be marked with the same color, i.e. all three conductors may be black or all conductors brown or all conductors gray. Black wire leads are preferably used in distribution boxes.

According to DIN VDE 0100-510, the cores of single-core cables or lines that serve as outer conductors must be brown, black or gray over the entire length.

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Tags:Electrical installation