My EE course did include safety training as a prequisite to using advanced lab equipment. Some really did not pay attention. "What's this [left] terminal in the [Euro Type F] socket?" − "Umm... phase?"
"And the other one?" − "The other phase?"
"And we have TN-C-S, which means the pin is neutral?" − "Yes"
"Go read it again" (He passed in the next round)