In [a system] touching mains
or a user: where is galvanic
isolation genuinely required,
what standard drives it, and
what specific failure does it
exist to prevent?

Where Isolation Is Required

The failure each isolation requirement was written to prevent.

Prompt

In [a described system] touching mains or a user, explain where galvanic isolation is genuinely required, what standard drives it, and the specific failure the requirement exists to prevent.