A picture is worth a thousand words! That special adapter with sliding lock looks like it ends in a NEMA 6-20 plug.PV1 wrote:Here are the pictures from Sandange:
https://www.dropbox.com/sh/04jon0xlx6m1 ... ruQ0a?dl=0
I'd be inclined to now make a few short pigtail adapters for use on the road, for example:
NEMA 14-50P --> 6-20R for RV parks and new ovens
NEMA 10-30P --> 6-20R for older dryer outlets
NEMA 14-30P --> 6-20R for newer dryer outlets
Also, maybe some 10-50 (old ovens) and 6-50 (old welder) to give you more options.
For years I had standardized all my EV extensions using locking NEMA L6-30 connectors with a zillion adapters for that 30A connector, but now I have the Tesla UMC which can comfortably draw 40A out of a 50A circuit (and even 80A if I hardwire the HPWC), thus obsoleting my collection...