A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the power and signal connections between the devices.
Iec Wire Color Code 24vdc. The protective ground must be bare green or green yellow striped. This created a lot of problem. Uk started using the iec code from march 2014.
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In the old iec color code all the lines in three phase supply are either brown or black. Hence the new color code is introduced. The colours green and yellow on their own are only permitted where confusion with the colouring of the green yellow protective conductor is unlikely. Hot active wires may be any other colors except these.
The wiring color codes as per iec may be divided in following two categories.
Wire color codes in europe iec for dc supply. Before that it had its own code for electrical wiring. The mandatory colors for power wiring in national electric codes nec are green bare or green yellow yellow strip or band on green for protective ground pg and white alternatively grey for neutral wire. It states that dc power wire colours are to be brown and blue. The en codes supersede the old british standards for the time being at least and the international standard en 60204 1 specifically governs control panel wire colour codes.
