Big Spanners and Too Tight Nylon Glands?

Is this an example of over tightening?

Also some E.V. charger point testing at the end. Very interesting.

https://www.bing.com/videos/search?q=you+tube+solo+smart+charger+jnstallation&view=detail&mid=40BD703FAF72E075DC3940BD703FAF72E075DC39&FORM=VIRE

Z.