I used to work in a manufacturing plant, and now work in a food processing plant. Flexible cord is often used (wrongly) as a substitute for a fixed wiring method. If the equipment is frequently moved, that's one thing...
In these pics we see fittigs that are intended for armored or metal-clad cable used with flex cord. Unfortunately, I was taught to do this. I now use prpoer fittings for cords.
The 4sq. handy box hanging in mid-air is listed to be mounted permanently.
Some strain reliefs and cord grips, but, some of the wiring methods and uses of cords look real low-budget.
