What is the minimum burial depth for direct burial cable without GFCI protection?

The minimum burial depth for direct burial cable without Ground Fault Circuit Interrupter (GFCI) protection is 18 inches. This requirement is set to ensure that the cable is adequately protected from potential physical damage and environmental factors that could compromise its integrity.

When buried at this depth, the cable is less likely to be disturbed by surface activity, such as digging or gardening, and is also safeguarded from exposure to moisture and other elements that can cause degradation or failure of the insulation. The 18-inch depth strikes a balance between safety, accessibility, and practicality in electrical installations.

In situations where additional protection methods are used, such as utilizing GFCI devices, different burial depths might be applicable, but for bare direct burial cable without GFCI, adhering to the 18-inch minimum is essential for compliance with safety standards.