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bouws

EN 60204 DC Com wire color

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Hello, I've read a lot of posts regarding wire colors according to EN60204 (for European machinery) but the one thing that is not discussed is the wire color for DC COM (grounded current carrying DC circuit conductor). The standard states the neutral wire is Lt Blue which I assume to be AC neutral. DC control circuits are blue but what is used for DC COM in Europe?

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The standard states (I have it right in front of me) that whenever a color-coding is used it is advised to use blue wires for DC control circuits, not mentioning any differences between +V and -V. At my workplace we simply use the same, dark blue color for the DC control circuits (that is when a customer does not require different color-coding).

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