What must exposed noncurrent-carrying metal parts of an information technology system be?

Exposed noncurrent-carrying metal parts of an information technology system need to meet specific safety requirements to prevent electrical hazards. Grounding these parts ensures that in the event of a fault, any stray electrical current is directed safely away, helping to prevent electric shock or fire. Therefore, they must be grounded to provide a reliable path for fault currents to discharge.

On the other hand, insulation from all sources can also prevent potential contact with live electrical parts and thereby reduce the risk of electric shock. This means that while grounding provides a direct safety aspect during faults, insulation serves as a preventative measure, keeping users safe from incidental contact with metal parts that could become energized.

Both grounding and insulation serve critical safety functions in protecting users and equipment in an information technology environment, thereby justifying the choice that states either condition suffices to ensure safety. Thus, selecting an option that includes both grounding and insulation aligns with best practices for equipment safety standards.