I'd like to hear your experiences with them when you do. Apparently Old Hat went so far as to put one in a vise, landed our typical #10 THHN, then proceeded to fail at ripping the wire out with a pair of channel locks. That seems to have been what sealed the deal for him.
I never had much issue when I had that one in left and middle with connections. The one on right seems to be pretty common anymore, I used to have connection problems with it all the time, until I coated contact surfaces with dielectric grease. Can't recall ever having a connection issue with the plug/connector since doing that usually something wrong with trailer wiring if it isn't working now.I could never figure this out either.
There are several competing style of trailer connector. 6 pin round going out of fashion. 7 pin round used on semi trucks and stuff. And 7 pin flat called RV style. The flat pin style is known to be problematic with pin contact, while the round ones are known to be reliable.
They also make all kinds of round connectors for power like the MC4 and certain Molex ones.
Yet, they can't get a round wire copper of a known diameter to work reliably in a receptacle after 40 years experience.
View attachment 2577263View attachment 2577262
I've seen supply house had some sample Leviton devices that were lever lock style. Never tried them, doesn't sound like many been purchasing them talking to counter guys either, so not sure how good they are or what kind of contacts they have for connecting to cords that get plugged in. Something tells me similar to the cheap residential receptacles which if so that would be a bigger deterrent for me than how they connect to premises wiring.
Had Hubbell send me a free made in cheating china lever lock duplex receptacle. I pushed in one of the lever locks without inserting a wire and could not get flimsy lever to unlock. Tried three different size screwdrivers, needle nose pliers and a pair of side cutters. Best place for it was in my trash can.
