Jeremy W. Sherman

@BMitch I didn't think to check meta. Thanks! That explains it.

I didn't see anything obvious on the blog.

So what is Project Update Thursday?

@KarlKatzke Necromancer comment, but: Gray and white are both standard colors for identifying the grounded conductor. NEC 2011 200.6(A) also gives a third option of 3 white stripes along the entire length over some color other than green. They probably used gray rather than white because there are 2 systems run together in the same raceway or box, and the grounded conductors need to be separately identified per 200.6(D).