This is the on/off switch to the entire breaker panel. A 200-amp breaker is appropriate ... tied customers' surprise—their power can't be used. One solution: Store power in a battery backup ...

For example, the price of a single-pole (120-volt) 15-amp breaker ... can range from $50 up to $350. Each job's price can vary based on needs and complexity, though. Circuit breakers are one ...