Which device is used to switch from normal power to backup power during installation?

The transfer switch is the correct device used to switch from normal power to backup power during installation. This device plays a critical role in systems that rely on alternative sources of electricity, such as generators, especially in residential or commercial settings where ensuring an uninterrupted power supply is vital.

When there is a power outage, the transfer switch allows for the safe and orderly transition from the main power supply to a backup generator. It ensures that the generator powers critical loads without back-feeding into the grid, which can be dangerous for utility workers and can cause damage to the generator itself. The transfer switch can be either manual, where the user must physically operate the switch to change the source of energy, or automatic, which switches over immediately upon detecting a power failure.

In contrast, a circuit breaker is primarily a safety device designed to interrupt the flow of electricity in the circuit to prevent overloads and is not meant for switching between power sources. A fuse box protects electrical circuits by containing fuses that blow to interrupt power when an overload occurs, but it doesn’t have the capability to switch between power sources. A power inverter converts direct current (DC) to alternating current (AC) and may play a role in backup systems but is not specifically designed to manage the switch between