deepfat

Is there anything that helps explain the RAVE wiring diagrams for example the main feed from the battery to the fuse box starts at C0192-1 (batt) and ends at C0632-1 (F box) what do these letter/numbers signify. The wire itself is N, 6.0 which I presume is N (colour?) and 6.0 (dia in mm?) if I'm right so far what does LGS,05D or NW,2.0D mean on a wire. The colour codes seem to be different from when I last looked (the 80's prob) is there a list of these somewhere and, are they universal or manufacture specific.