Yep, yet another once universal test that's probably been dropped completely for entry into the electrical industry. Why is it that everything seems to revolve around simple domestic installations, when there is a big world out there of high end industrial and commercial installations.
So what do these new colour blind electricians do when they are confronted with and old installation, or multi coloured control cable wiring et,c etc, etc?? There is/was a reason behind colour blindness testing, and it still holds today!!
Someone mentioned that some cables have washed out colours, these will normally be XLPE insulated cables, where quite often the colours are near transparent compared with PVC insulated conductors, especially in SWA cables...
