Which of these practices is essential for safety when performing electrical installations?

Following established safety protocols is essential for safety when performing electrical installations because these protocols are designed to minimize the risks associated with electrical work. They provide guidelines that help ensure both the worker's safety and the integrity of the electrical installation. Safety protocols include proper use of personal protective equipment (PPE), correct handling of tools and materials, understanding electrical codes, and adhering to safe practices regarding voltage levels, insulation, and grounding.

By sticking to these guidelines, electricians can avoid accidents such as electric shocks, falls, or equipment damage, which can lead to serious injuries or fatalities. Safety protocols are typically developed from industry standards and regulations, ensuring that all safety measures are based on best practices.

The other options highlight practices that compromise safety. Working quickly to save time can lead to mistakes and oversights; using outdated equipment may fail to meet current safety standards, leading to hazards; and working without supervision eliminates an important layer of safety oversight that can catch potentially dangerous situations before they escalate. Therefore, following established safety protocols not only protects the workers but also ensures compliance with regulatory requirements and enhances the overall quality of the electrical work.