well i agree with that, i would, personally, not describe 5 to 10% as rare, minority perhaps, rare i might include 1% or less or thereabouts, it depends upon your context and of course what you have seen where you have seen it so we might all have a slightly differing opinion certainly the works i have undertaken red was the "true L" and black the "switched L".
Mind you for strappers if using the old ryb a lot would use red on the com connection for two way switching whereas i am unusual in using red for L1, i suppose its to put both reds (either on T & E or 3 C & E) in a terminal and designating them both as "True L" and the remaining colours as switchable. copied thru of course to the new colours Br Bk Gr & Br Blu combinations, of course i always sleeve but leave a snippet of the original colour showing underneath for easy reference.
but just because i do that it does make me right and anyone else wrong though
Mind you for strappers if using the old ryb a lot would use red on the com connection for two way switching whereas i am unusual in using red for L1, i suppose its to put both reds (either on T & E or 3 C & E) in a terminal and designating them both as "True L" and the remaining colours as switchable. copied thru of course to the new colours Br Bk Gr & Br Blu combinations, of course i always sleeve but leave a snippet of the original colour showing underneath for easy reference.
but just because i do that it does make me right and anyone else wrong though