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AMD 2 - changes to conductor colour coding

AJJewsbury
It seems that AMD 2 is introducing yet another big change to colour coding - albeit only for DC systems. +ve is changing from brown to red and -ve from grey to white.


Also functional earths are changing from Cream to Pink.


Anyone know


a) why the change?

b) why the "old" (i.e. brown/blue) colours aren't permitted as an alternative?


(the 2nd question is about being able to comply with two different versions of BS 7671 at the same time - e.g. where legislation demands compliance with an older version but customer requirements are for compliance with the latest version - DC systems being increasingly common in domestic installations - e.g. PV systems.)


   - Andy.
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    That will be interesting - another change of colour for the DC in telecom type installations. Since I started with the Electricity Supply Industry, we have had: 

    red and black (red earthed positive)

    black and blue (black earthed positive) 

    blue and grey (blue earthed positive) 


    and now the proposed blue and white, with blue as the earthed positive.


    We have also recently had European kit with red and blue conductors, where red is the earthed positive. In the past, I have also had white and grey, but can’t remember which way round that was! 


    Regards,


    Alan.
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  • 0
    That will be interesting - another change of colour for the DC in telecom type installations. Since I started with the Electricity Supply Industry, we have had: 

    red and black (red earthed positive)

    black and blue (black earthed positive) 

    blue and grey (blue earthed positive) 


    and now the proposed blue and white, with blue as the earthed positive.


    We have also recently had European kit with red and blue conductors, where red is the earthed positive. In the past, I have also had white and grey, but can’t remember which way round that was! 


    Regards,


    Alan.
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