The NEMA 11 are not locking while NEMA L15 are. The locking type are more common & I think are easier to use & don't come unplugged easily. So for a 30A cord, you'd use L15-30. The 'L' denotes locking, a suffix 'P' indicates a male plug, a suffix 'R' means wall receptacle, and a suffix 'C' is a female cord connector.
Thanks, Jim. Very nice of you.
- After I ask a stranger if I can pet their dog and they say yes, I like to respond, "I'll keep that in mind" and walk off
- It's above my pay grade. Mongo only pawn in game of life.