Another update on Austria or Germany pre-1970s:
Wire colors for flexes:
black-grey
black-grey-red
black-grey-red-blue
black-grey-red-blue-white
Fixed wiring:
black-grey
black-grey-red
black-grey-red-blue
black-grey-red-blue-black
Most conductors have more than one acceptable use.
Black, white and blue are always phases.
Red is ground. Where no ground is/was required, red can be a phase conductor, switched phase or traveler.
Grey can be neutral (TT and TN-C-S systems), phase (TT or TN-C-S in 3ph circuits without neutral) or PEN. In conduit, phases can be any color, but if there is a ground in the conduit there must be no other red wire. Ground has to be red.
Since existing runs can be re-used and even re-purposed it is still important to know the old codes. As far as I know the new harmonised colors were introduced in 1967 with a transitional period until 1972.
The harmonised colors introduced the distinction between cables with a yellow/green conductor (-J types in both Austrian and German national designations) and without (-O types), I think in the harmonised scheme it's G or X (e.g. H05VV-F 3G1.5 or 3X1.5).
-J:
yellow/green
black - yellow/green
black - blue - yellow/green
black - blue - brown - yellow/green
black - blue - brown - black - yellow/green
-O
black
black - blue
black - brown - blue
black - brown - black - blue
black - brown - black - black - blue
All cables with more than 5 conductors (including the yellow/green) have a yellow/green conductor and 5 or more numbered black conductors, one of which can be re-identified blue for the neutral but does not have to (it can be left black).
I also found a document on previous Swiss color codes:
http://download.hager.com/hager-tehalit.ch/files_download/DocHager/Aderfarben-D.pdf
