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- 3 Feb 2005
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I know that around 2004/5 for twin and earth cable the new colours blue and brown came out just before part p came in but did this also happen for the wiring in consumer units on sale as well? I have noticed that the internal wiring from the neutral bar and rcd isolater etc has also changed in line with the new colours from previously black and red. Did the manufacterers change these colours before part P came in like they did with the twin and earth or did these change a short while afterwards?