How frequently should switchgear for underground electric distribution circuits be inspected?

Switchgear for underground electric distribution circuits should be inspected on an annual basis to ensure safety and operational reliability. This frequency allows for a thorough examination of both the physical components and the electrical systems, identifying any potential issues that could lead to failures or unsafe conditions.

Annual inspections help in detecting wear and tear, ensuring that maintenance can be scheduled effectively. Additionally, this timeline aligns with standard maintenance practices and regulations in the industry, which emphasize the importance of regular assessments to maintain functionality and compliance with safety standards.

Inspections more frequent than annually can be overly burdensome and may not be necessary if the switchgear is in good working condition, while inspections less frequent than annual could risk undetected issues that might escalate into significant problems. Thus, an annual inspection strikes a balance between thoroughness and efficiency, making it the appropriate choice.