Paul,
I've just waded and driven through 2-3foot of snow to come up with an answer to your Colour-Blindness question!.
Yes, another Fault Call-out, to repair a 3-phase Lathe, that kept on blowing HRC fuses.
R-class, they were and there was a dead short to earth.
Got my Avo-Megger on the case and found that there was a transposed Phase and Neutral, caused by the use of the Blue wire as a Neutral, in a Delta(mesh) connected system(it was hooked into a 3-pole MCB at the supplying board), I only found this because of the low reading to Earth, hooked it up the right way and he was turning like never before!
Turning Brass of all things!, but who am I to argue!. [Linked Image].
One of the easiest Faults calls I've done in a wee while, if you discount the snow!!!.
And if you're wondering why I mentioned two lots of Circuit Protection, that's because it was hooked up that way!!!!. [Linked Image]

[This message has been edited by Trumpy (edited 07-05-2003).]