Phase rotation

How can we tell the difference between say R Y B or Y B R or B R Y they are all say clockwise and anything else would be anticlockwise say. Is there a marker dip or something on perhaps Red to let us know it`s not yellow or blue? 

PS - I think it might have been Mapj1 or Graham Kenyon did a little sketch of a simple rotation check cct a while back. Could we see that again?

I emailed that circuit to you about ten years ago - I'll dig it up again;-)

As far as I know there is nothing special about first phase, just that as soon as you have chosen first phase, then the choice of second defines the rotation direction

Absolute timing is not maintained, indeed "red" in some districts is the same as the  phase called "blue" in another. This is done to counter the tendency to load up red 1st, so the DNOs cycle them to balance things up a bit. They are however very careful to retain the rotation sense.

Mike.

I emailed that circuit to you about ten years ago - I'll dig it up again;-)

As far as I know there is nothing special about first phase, just that as soon as you have chosen first phase, then the choice of second defines the rotation direction

Absolute timing is not maintained, indeed "red" in some districts is the same as the  phase called "blue" in another. This is done to counter the tendency to load up red 1st, so the DNOs cycle them to balance things up a bit. They are however very careful to retain the rotation sense.

Mike.