[js2]

The US NEC now requires arc fault circuit interrupters which are pretty darn expensive circuit breakers with built-in electronics to detect an arcing situation that wouldn't trigger a normal circuit breaker but can cause a fire.

[Gibbon1]

I keep hearing electricians say that they can't detect bad splices which how most residential electrical fires start.

[yrro]

I've seen videos of these on YouTube and they seem useless!