So do I read that as saying that you would use black as neutral for smokies; iaw bs5839, and grey for neutral in other cases?from memory if single phase, the use of colours is dependant on what it is being used for. If 2way strappers, all cores are sleaved brown. If used as swa, grey becomes blue & black becomes earth & smoke alarms as colours mentioned as above. This is the recommendations for NICEIC contractors as given by them, got the info somewhere but no time to look at moment. Don't think it mentions it in the 7671 though so I assume it is not gospel but it would be good if all installs were identified in the same way.
Or are we actually saying that BS5839 is less important than BS7671?