Which of the following is critical in maintaining safe operations of electrical devices?

Regular inspections and maintenance are essential for ensuring the safe operation of electrical devices. These practices help identify potential hazards, wear, and tear, or defects in electrical equipment before they lead to failures or accidents. By conducting routine checks, one can ensure that safety features are functioning correctly, and any signs of damage or irregularities can be addressed promptly. This proactive approach not only enhances safety but also extends the lifespan and reliability of the equipment.

In contrast, infrequent testing may save time initially but can lead to significant risks if problems go unnoticed. Optimizing the number of electrical devices does not directly relate to their safe operation; rather, it focuses on efficiency or workload rather than safety management. While limiting access to trained professionals is important for safety and compliance, it does not directly address the ongoing requirement for regular inspections and maintenance to ensure that devices function safely over time.