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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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    Well as the electronics world uses red and black for DC and blithely ignores much of this standards nonsense, following the de-facto trend and using red positive is perhaps not so foolish . Pity that white purple and pink are in use as "positive" colours, while black and green are earthy and blue is negative. (actually whole looms of every wire is pink in military avionics)


    I would be very surprised if car makers and telecom systems suddenly change their colour schemes to match this, and I fully expect to still find  power over ethernet using things like orange and white and white and orange as the two poles.

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  • 0
    Well as the electronics world uses red and black for DC and blithely ignores much of this standards nonsense, following the de-facto trend and using red positive is perhaps not so foolish . Pity that white purple and pink are in use as "positive" colours, while black and green are earthy and blue is negative. (actually whole looms of every wire is pink in military avionics)


    I would be very surprised if car makers and telecom systems suddenly change their colour schemes to match this, and I fully expect to still find  power over ethernet using things like orange and white and white and orange as the two poles.

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