that is not ok. They should be using something listed to UL 1640 such as a 'spider box'
It would be acceptable if set up on a stand that the panel was mounted too.
I made something similar out of an 800 amp panel board, I welded up a stand on wheels so I could roll it around. I would say the hole thing with the portable power cable was 800 to a 1000 lbs.
Why do old electricians talk about things in the middle of the night?!
'Cause we're happy just being old electricians.Why do old electricians talk about things in the middle of the night?