Locking, 250 volts, 30 amps

Take a look at
www.leviton.com/sections/techsupp/nema.htm (straight blade)
and
www.stayonline.com/reference-nema-locking.aspx (locking blade)

wrote:
I am new to this who Power calculation thing, what does the "L" stand
for in the notation "L6-30"??

Does it mean "Locking" or "Leviton" or something else.

And what does the "6" means as well? I asusme the "30" is Amps.


Any insight on this would be very helpful. I know this is an easy
question, but I need help.

Thanks all!