ECN Forum Forums General Topics of the Trade General Discussion Area 3 phase numbering

The rythym is Black, Black, Red, Red, Blue, Blue at 208Y120.

This is repeated seven times in the typical three phase panel of 42 circuits.

So...

1,2 Black
3,4 Red
5,6 Blue

The colors shift if we're talking 480Y277
But the rythym stays the same.