What must be buried at a specified depth to prevent damage according to Article 230?

The correct choice, which pertains to underground service conductors, reflects the requirements set forth in the National Electrical Code (NEC) regarding the installation of electrical systems. Article 230 outlines specific provisions to ensure that underground service conductors are adequately protected from potential damage due to external factors, such as environmental conditions and accidental contact.

Underground service conductors must be buried at a specified minimum depth to safeguard them from physical damage. This depth is determined based on various factors, including the type of conductors used and their insulation ratings. Adhering to these depth requirements is essential for the longevity and safety of the electrical installation, helping to prevent issues that might arise from environmental exposure or mechanical impacts.

Understanding these code requirements is crucial for electrical professionals to ensure compliance with safety standards and to protect both the electrical infrastructure and the property being serviced. This concept reinforces the importance of proper installation practices in the electrical trade.