On May 2, 10:11*am, wrote:
On Mon, 2 May 2011 04:45:43 -0700 (PDT), jamesgangnc

wrote:
Actually 10/2 with a three prong plug was acceptable for dyers for a
long time. *

Not really. The code called that 3d wire a "neutral" that was also
being used as a ground and the neutral was always required to be an
insulated conductor. I agree a lot of inspectors ignored this
violation but that did not make it right.

Millions of existing installations suggest that at some point the code
did not make that distinction. Or it was hugely ignored. Either way
there are a LOT of 10/2 dryer circuits.