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E.L.V. Colour Identification.

Zoomup

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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  • 0
    Zoomup said:
    P.S. Edit. Add. I have just found this..........

    The colour coding is out of date.

    EU harmonized standard BS EN IEC 60445 (and also the one in IEC 60445) has the following preferred colours (requirement in BS 7671:2018+A2:2022 for the installations in the scope of the standard):

    2-wire DC

    L+ Red (RD)
    L- White (WH)

    2-wire positive earth DC

    M Blue (BU)
    L- White (WH)

    2-wire negative earth DC

    L+ Red (RD)
    M Blue (BU)

    3-wire DC

    L+ Red (RD)
    M Blue (BU)
    L- White (WH)
  • 0 in reply to gkenyon

    The list colours might be out of date but are still actuality found in real life. There are just too many changes and reasons for confusion. Consistency is sadly lacking. For vehicle wiring to a 12 Volt battery I still prefer the age old established colours as found on car batteries, RED = + and BLACK = -.

  • 0 in reply to Zoomup

    Hi , even this has changed now ... Brown L+

    www.gomog.com/.../LucasColours.html

  • 0 in reply to gkenyon

    Hello Graham, I have just been helping a neighbour with his new camper van and connecting up a solar panel and 12V T.V. and aerial amplifier. I do not really follow any colour coding any more, and test for polarity with a continuity tester with a bleep mode. Most stuff is centre pin positive with the 12 Volt plugs and cigar sockets and plugs. I can not afford to get things wrong.

    But with anything in a camper van, I alwas ensure adequate local fusing to prevent overloading or fire in the case of a short circuit or faulty appliance.

    Z.

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  • 0 in reply to gkenyon

    Hello Graham, I have just been helping a neighbour with his new camper van and connecting up a solar panel and 12V T.V. and aerial amplifier. I do not really follow any colour coding any more, and test for polarity with a continuity tester with a bleep mode. Most stuff is centre pin positive with the 12 Volt plugs and cigar sockets and plugs. I can not afford to get things wrong.

    But with anything in a camper van, I alwas ensure adequate local fusing to prevent overloading or fire in the case of a short circuit or faulty appliance.

    Z.

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