On 10/31/2013 11:21 AM, DerbyDad03 wrote:
wrote:

Maybe this will shed some light on it

http://upload.wikimedia.org/wikipedi...d_pins.svg.png

I could use a little more light to be shed...

Why do they use the text "Welder or Plasma Cutter" above the L6-20 and
L6-30 plugs?

Are there no other devices that use a locking 20A or 30A plug?

Welders operate on a duty cycle, so code allows you to "downgrade" the
wire size from the listed amps of the unit, since the unit cannot be run
continuously.

The outlet has to be labeled that it is specified for a welder, though,
so nobody plugs in a continuous-duty appliance.

Jon