Safety: testing Electrical outlets

[Helmholtz]

Well, a good caution that even something that seems harmless enough due to low voltage, can still turn around and bite you!

Watch out for switched inductors!

[Helmholtz]

This is what I meant about 12V being dangerous if skin is pierced. Most of how we think about shock is under the assumption of normal dry skin resistance.

My points were referring to the safety difference between European and American (of course I consider Canada a part of Northern America, so maybe Trump will make also Canada great again ) mains voltage as indicated by x-pro.
Particularly regarding a typical band stage situation with some ground fault.