What is the required depth for underground feeder cable?

The required depth for underground feeder cable, which is essential for ensuring safety and protecting the cable from potential damage, is indeed 24 inches. This depth is stipulated by the National Electrical Code (NEC) to minimize the risk of accidental damage from surface activities like landscaping, vehicle traffic, and other typical outdoor activities. Trenching too shallow can expose the cable to risks from digging or other disturbances over time.

Choosing the correct depth is crucial for compliance with safety regulations and preventing electrical hazards. Depths of 12 inches, 18 inches, and 30 inches do not align with standard practice for underground feeder cable installation. While these depths may pertain to other types of wiring or specific conditions, the established requirement for underground feeder cable ensures it remains sufficiently protected from environmental factors and potential physical contact.