Residential electrical branch circuit breakers incorporate electronic and electrical technology in Arc Fault Circuit Interrupters that can turn off power to prevent fires if arcing occurs.

However, smart circuit breakers can now operate with real-time data, automatically isolating faults and rerouting power where possible, often before the fault becomes catastrophic.

The United States' National Electrical Code (NEC) recently expanded Arc-Fault Circuit Interrupter (AFCI) requirements (see "Arc-Detecting Circuit Breakers Will See Wider Use" at www ...

We asked an expert to explain all the problems that can cause tripped circuits, how to check your circuit breaker, and when to call a professional.