On 08/02/2012 14:18, Mortimer wrote:
"Mike Tomlinson" wrote in message
...
Three-phase wiring has been harmonised from red, blue and yellow for the
phases and black neutral to brown, black, black and blue neutral. Yeah,
I know...

You mean that two of the phases are the *same* colour? Surely not: how
do you know whether it's safe to connect two wires if they could be on
different phases? And if you connect brown, black and black to a three
phase motor and get the two blacks the wrong way round it will run
backwards.

It's brown, black. grey, blue. Still stupid and difficult for those with
colour blindness or working in low light.

Ron