@molingus Ahem. In what 3rd world country do you all live where shorting a fuse in an audio amp starts your hovel on fire? Move into the modern world, where our buildings have code, and our breaker boxes have, uhhh, breakers installed.
It is a mis conception that a faulty component that takes damage when its fuse does not blow, will instantly trip a 15A or 20A circuit breaker before enough damage is done to start a fire in the component. In most cases it will not. If your faulty component doesn't blow a 10A fuse (where there should have been a 3A or 5A fuse) before causing damage or fire, don't expect it to trip a 20A circuit breaker.......Jim
It is a mis conception that a faulty component that takes damage when its fuse does not blow, will instantly trip a 15A or 20A circuit breaker before enough damage is done to start a fire in the component. In most cases it will not. If your faulty component doesn't blow a 10A fuse (where there should have been a 3A or 5A fuse) before causing damage or fire, don't expect it to trip a 20A circuit breaker.......Jim

