Dagworth

Yes I still use red and black wire for my feeds - and yellow for the polarity switching for "common frog" feeds to the Peco SL-E's!  Actually doing mine right now as part of layout rebuilding!

@Hroth said "Red and Black date back to the pre-1977 mains cable colours, you really should start thinking in terms of Brown and Blue"

... but Blue doesn't rhyme with track!!!  That's why it's still Red and Black to the track. 😀

Mine are multicoloured. 😎