Circuit breakers protect you ... The electricity coming into your home starts out at the transformer, either outside in a green transformer box or on a power pole. From the transformer, it ...

Here's what to know about so-called “circuit breakers" and when they're used to halt trading on stock markets.

The single stock circuit breakers, or Limit Up-Limit Down (LULD) prevent extreme price swings in individual stocks by pausing trading if prices move outside set "bands" for more than 15 seconds.

Even if you aren’t an electronics person, you probably have a working knowledge of circuit breakers. When the lights go out, you find the circuit breaker and flip it back to the on position.