NEC Article 647 History?

[DataCenterGuy]

I'm comparing Article 647 in prior NEC books, and see that it seems to have first appeared in 2002. However, only parts of it contain Revision Bars. Further, in a thread long ago, Mike Holt noted proposed changes in the 2002 edition. How was an Article changed that didn't previously exist? Can someone explain what I'm apparently missing here?
:?

 

[GoldDigger]

I'm comparing Article 647 in prior NEC books, and see that it seems to have first appeared in 2002. However, only parts of it contain Revision Bars. Further, in a thread long ago, Mike Holt noted proposed changes in the 2002 edition. How was an Article changed that didn't previously exist? Can someone explain what I'm apparently missing here?
:?

I would imagine that it could have appeared in part under a different number and then been moved to or consolidated as 647.
Often content is renumbered as part of a revision, intending to bring similar or related topics together.

 

[don_resqcapt19]

While the Article is new for 2002, most of it was transplanted from Part G of Article 530 in the 1999 code.

 

[DataCenterGuy]

Issue Resolved !

Issue Resolved !

Thanks. That answers it. But I guess I'm still a little surprised that wasn't noted or referenced some way.