Code Q&A

What is the minimum burial depth requirement for residential service lateral conductors installed in rigid nonmetallic conduit?

Q. What is the minimum burial depth requirement for residential service lateral conductors installed in rigid nonmetallic conduit?

A. Cables and raceways run underground must have a minimum “cover” in accordance with Table 300.5. This table requires a minimum of 18 inches of cover. According to Note 1 to Table 300.5, “Cover” is defined as the distance from the top of the underground cable or raceway to the surface of finish grade.

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