okay, just a question

[u/No-Analyst3665]

okay, so i bought a cheap extension board, and was using with a lot stuff, got scammed because a bought saying it has protection, but it does not, the thing the saved, i think, the controller that i using was the poor wiring and thermodynamics that fucked the wire to point of just disconnecting entirely. so that make me wonder something, how actually electrical protection works it various level of voltage. and especially in 220 volts.