The identification of wires depends on the number of cores and the presence of a protective ground (green-yellow): 3 Cores : Green-Yellow, Blue (Neutral), Brown (Phase). 4 Cores : Green-Yellow, Brown, Black, Grey. 5 Cores : Green-Yellow, Blue, Brown, Black, Grey. Without Green-Yellow Ground (-O cables): 2 Cores : Blue, Brown. 3 Cores : Brown, Black, Grey. 4 Cores : Blue, Brown, Black, Grey.
The standard is a critical European regulation that governs the color identification of cores in low-voltage electrical cables. It was introduced to harmonize wiring standards across Europe, ensuring safety and consistency for electricians and technicians working on international projects. The Evolution of Electrical Identification VDE 0293 308 DIN VDE 0293 308 2003 01 pdf
For cables with , the standard typically mandates black cores with white numbering, with the green-yellow ground always placed in the outer layer. Impact on Safety and Industry Color Code to VDE 0293-308 | Mueller Group The identification of wires depends on the number