I was told that they changed the colors so that inspectors and others
would easily know the gauge of the wire without trying to read the
impossible-to-read writing on the side of the wire. So, they now see
yellow and know it's 12. To the OP, I had thought 14 was still always
white, but I guess not.
Yep, it doesn't... :)
I did a quick dags to see if I could find any reference to a new
standard for cable sheathing colors and it came up empty. I'm nearly
certain the color is simply a convenience for installer (keeping easier
track of multiple cables in a single run path, for example).
It's not a "standard", but from some manufactuers (for example,
Southwire) NM is:
White - 14 AWG
Yellow - 12 AWG
Orange - 10 AWG
Black - 8 AWG and 6 AWG
Paragon Home Inspection, LLC
Yeah, I just found another manufacturer's catalog has the codings as
Ya' larns sumthin' all the time... :)
I guess what threw me was old stock on the same shelf -- yellow and
white 12/2 from the same manufacturer were side-by-side last time I
bought a roll retail (which has been a while) so I just figured it was
a "users' choice" thingy...makes sense to have a code, however,
assuming everybody will either use the same one or stick w/ white. If
various manufactuers do other odd things (like, where's the blue come
from OP noted in the above chart?) then it's worse than everything one
color for the unexperienced average joe who can't recognize a 12 from a
10 or 14 simply from the size of the bare conductor...
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