I'm studying the subject Electrical Safety in Engineering and a special term really drew my attention. When I tried to google it, no any option was suggested but hull protection.
In the presentation slide, the definition of the term is explained in a such way.
Hull voltage: voltage that occurs when the insulation between accessible contacting parts usually not under voltage and a sufficiently distant point on the Earth's surface, is damaged or between such parts and other conductive parts with zero potential;
Could anyone explain the exact meaning of the term hull voltage?