Some home electrical systems include a dedicated disconnect switch that is mounted on an outside wall of the home near the electric meter. In the event of a fire or flash flood, or if work needs to be done on the system, a disconnect switch allows you to shut off the power from outside the home so you don’t have to enter the home to turn off the power. If an electrical system does not include a separate disconnect switch (and most do not), the main circuit breaker in the home’s main service panel (breaker box) serves as the system disconnect.