Which tool is essential for ensuring safety while working on electrical systems?

Insulated gloves are essential for ensuring safety while working on electrical systems because they are specifically designed to protect the user from electrical shocks and potential injuries. When working with or near live electrical components, it is critical to prevent any direct contact with conductive materials that can cause electric currents to pass through the body, which can lead to serious injuries or fatal accidents. Insulated gloves provide a barrier that isolates the user from electrical energy, ensuring that they can work safely without the risk of electric shock.

In contrast, while tools like wrenches, screwdrivers, and measuring tapes have their own specific uses in electrical maintenance and repair, they do not provide the same level of protection against electrical hazards. Wrenches and screwdrivers are essential for fastening or loosening connections, and measuring tape is useful for measuring distances, but none of these tools offers the electrical insulation that is critical when handling or working around live circuits.