We make an instrument that is powered from a three phase supply. The instrument power is supplied down a flexible conduit with individual wires which the customer wires into (his) wall mounted isolator. The colours used are red-blue-yellow for the phases, black for neutral and green/yellow for earth. I have been told that it is a European-wide requirement that the colours should be brown for all phases, blue for neutral and green/yellow for earth.
Can anyone confirm this and perhaps point me to the appropriate regulations. Thanks for any help. Phil Tatterton Micromass UK
