What precaution should be taken when working on live circuits?

When working on live circuits, using insulated tools and wearing rubber gloves is essential for ensuring safety. Insulated tools are specifically designed to prevent electrical current from passing through them, reducing the risk of electric shock to the worker. Rubber gloves add an additional layer of protection by providing a non-conductive barrier that isolates the user from the electrical current. This combination is critical in maintaining safety standards and preventing accidents in environments where live wires are present.

Using metal gloves would be incredibly dangerous, as they can conduct electricity, leading to severe injuries or fatalities. Relying on one hand while working may limit maneuverability and is not a recommended safety practice. Turning off the main power switch is also a highly advisable step, but in scenarios where circuits must be worked on live, insulated tools and proper personal protective equipment become paramount to worker safety.