Davey submitted this idea :
Back when Ford built a brand new factory near Valencia for the new
Fiesta, I went out there to commission the paintshop bake ovens. The
electrical contractor had no idea about the importance of the correct
use of Thermocouple compensating cable, and the long runs were
connected randomly. The effect of this was that some zone burners were
running flat out, while others were idling, and there was a total lack
of control of oven temperature. Once this was sorted out, it worked
properly. Until then, it was chaos.

It must be an Italian thing...

When I was out there, a French guy whom I got friendly with, who was
staying in our hotel in Brescia, had exactly the same problems
commissioning a process oven, except they had been wired in copper.