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E.L.V. Colour Identification.

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I have just been helping a neighbour with his new camper van. Long story short, I ran a cigar lighter extension lead from the cab to the under-vehicle leisure battery. The lead originally had a male plug at one end and a female socket at the other. I cut the male plug off for a connection to the leisure battery. The flex is a white figure of 8 with one conductor marked with a black stripe. After installation I decided to double check the polarity of the socket in the cab for polarity. Low and behold the centre pin was negative and the outer ring positive, thus back to front. Why do the Chinese use black as D.C. positive indicator?

P.S. Edit. Add. I have just found this..........

DC 12v Black and White Wire (12v Wiring Color Coding Guide) (thecampingadvisor.com)

Z.

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  • +1

    For USA and 110V far east black is a live colour - rather like red or brown here. White is a neutral colour rather as blue here.

    So it is a sort of re-use of the mains colours.

    Mike

  • 0 in reply to mapj1

    Thanks Mike.

    Z.

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