How high must conductors and cables be protected when they emerge from grade?

When conductors and cables emerge from grade, they are required to be protected to a height of 8 feet. This height is mandated by the National Electrical Code (NEC) to prevent accidental contact or damage from vehicles or other objects that might come into contact with the conductors or cables.

The 8-foot height is significant because it ensures that the conductors are elevated above typical human activity and vehicular traffic. This requirement is essential for maintaining safety in areas where the risk of inadvertent contact is higher. The NEC emphasizes physical protection for electrical equipment and installations, particularly in locations where they could be exposed to mechanical injury or interference.

This clear standard is established to enhance safety for both individuals and the integrity of the electrical system, reflecting the NEC’s commitment to reducing hazards in electrical installations. In contrast, the other height options do not meet the NEC's requirement for protecting conductors and cables at grade level.