Doug Miller wrote:

As long as those pigtails don't make it possible to do something like plugging
a 30A tool into a 20A receptacle on a 20A circuit, that's fine.

If they *do* make that possible, you have a *serious* hazard.

Why? Wouldn't the 20A circuit have a 20A breaker, which would trip due
to the 30A load? You say "Doh!", reset the breaker, and plug it into
the correct outlet and go on...

-j