twist lock pieces
I have found that commercial twist lock cords with 20 amp ends last a lot longer. I have a few 6 outlet spider construction boxes with 50 amp hart plugs for in and out. I have a few short adaptors that go from 110v twist to household straight blade w grd. I have found more problems with house hold connection cords. you can buy 110v 20 amp commercial recepticals. They have a t slot and last longer.