What should be done before checking for correct grounding in electrical work?

Turning off the power is a crucial step before checking for correct grounding in any electrical work. This action ensures the safety of the individual performing the inspection, as live wires can pose a serious risk of electrical shock or injury. By cutting off the power supply, the risk of accidentally coming into contact with energized components is eliminated, allowing for a safe environment in which to assess the grounding.

The other steps, while potentially useful in context, do not specifically address the immediate safety concerns that arise when dealing with electricity. Making sure all devices are unplugged, for example, may be part of a safety protocol, but it does not provide the comprehensive safety measure that disconnecting the power does. Checking the fuse box can also be relevant, particularly in diagnosing issues, but it does not directly prevent the hazards associated with live circuits. Insulating all wires is essential for preventing electrical shock and accidents but would not be the first step in ensuring safety prior to grounding verification. Prioritizing the power-off procedure establishes a foundation of safety for all subsequent electrical work.