eli5 : Circuit breakers and how they protect your electronics, from the theoretical aspect.

Question

I have some very basic understanding of current, voltage, resistance and that circuit breakers have fuses which blow if a current threshold is surpassed. But I don’t understand how putting multiple devices connected to your wall outlets, especially if they’re connected to the same fuse, would trigger this. Isn’t the voltage allocated to each circuit the same?

In: 1

Answer 1

It’s load not voltage. If the circuit either has a leak to earth or has too much load (amps) then it’ll trip.