I really do feel bad for you. I wonder what's going on back at the panel to be causing this. Then again, it could be a bad connection right at the receptacle.

This is a long shot (really long) but try swapping ADA power cables.


A-LFR/1000-8 & 2/500v4x2
1000-3,1500-3
100,160,QS10x2,800,M5x2,M2/3/50v4
Air Force, Freedom
had v2