If equipment is supplied by a Class 1 power-limited circuit that is grounded, what is required for the equipment?

When equipment is supplied by a Class 1 power-limited circuit that is grounded, grounding of the equipment itself is necessary for safety purposes. Grounding reduces the risk of electric shock and ensures that any fault current has a safe pathway to the ground, which helps prevent electrical accidents. The grounded circuit provides a reference point for the system, enhancing both the effective operation and safety of the equipment.

In this context, choosing the option that states the equipment must also be grounded aligns with the principles of electrical safety and system reliability. Grounding the equipment helps protect personnel and equipment by minimizing the risks associated with electrical faults, such as short circuits or insulation failures, which can lead to dangerous situations if left ungrounded.

Other options do not adequately address safety concerns or electrical standards. For instance, while double insulation can be a safety method, relying solely on it without grounding can leave some scenarios unprotected. Non-metal equipment does not inherently negate the requirement for grounding, and the suggestion that grounding is unnecessary contradicts established safety protocols.