Which of the following actions is essential to take before beginning work with electrical tools in wet conditions?

Before beginning work with electrical tools in wet conditions, it is crucial to cut the power supply. This action is essential for preventing electrical shock and ensuring safety because wet conditions increase the risk of electrical conductivity. When using electrical tools, water can create a path for electricity to travel through the body, amplifying the danger of serious injury or even death.

By ensuring that the power supply is cut, you effectively eliminate the risk of electricity flowing through the tools and into your body. This proactive measure creates a safe working environment, allowing other precautions, such as wearing protective gear or ensuring grounding systems, to be effective.

While protective gear and grounding are important safety practices, they do not address the immediate risk posed by the electrical power itself in a wet environment. Safety glasses, though useful in protecting your eyes, do not reduce the threat of electrical shock in wet conditions. Thus, cutting the power supply is the fundamental step that must be taken to safeguard against electric shock before any further safety measures can be effectively implemented.