Why should all electrical work be performed with the power turned off?

The primary reason for performing all electrical work with the power turned off is the prevention of electrical shock and ensuring safety during installation or repair. When working on electrical systems, live circuits pose a significant risk of electric shock, which can lead to serious injury or even fatality. By turning off the power, you eliminate the risk of accidentally touching live wires or components.

In addition to protecting individuals from harm, turning off the power allows for a more controlled and safe working environment. It enables electricians and technicians to handle wires, devices, and connections without the added stress of potential electrical hazards. This cautious approach is a best practice in electrical safety protocols and is emphasized in training to ensure that all workers are aware of the risks associated with live electrical work.

While the other options may pertain to electrical work in specific contexts, they do not address the paramount concern for safety that the correct answer highlights.