What condition must be met before using an electric power tool?

For an electric power tool to be used safely, it is essential that the plug has a functional ground prong. The ground prong plays a crucial role in preventing electrical shocks by providing a safe path for electricity to flow in case of a fault. If the ground prong is missing or not functioning properly, there is a higher risk of electrical accidents, as the tool may become energized and pose a serious hazard to the user.

Ensuring that the plug has a functional ground prong is a key safety measure and generally mandated by electrical safety standards. This component helps to protect users by directing any stray electrical current to the ground, thereby reducing the risk of electric shock. It is a critical requirement that significantly contributes to the overall safety when handling electric power tools.