For non-metallic conduits, what is the safe minimum burial depth?

The safe minimum burial depth for non-metallic conduits is 24 inches. This requirement is established to protect the conduits from potential damage due to surface activities, such as landscaping or construction, which may inadvertently disturb or damage below-ground infrastructure. A deeper burial depth ensures that the conduit is shielded from impacts, avoids frost heave in colder climates, and provides sufficient coverage to safeguard the electrical system's integrity.

While other depths, such as 12 inches or 18 inches, may be considered for certain situations or for other types of wiring or materials, they do not meet the industry standard for non-metallic conduits to prevent damage effectively. The choice of 24 inches is particularly relevant in Michigan, where soil conditions and weather can significantly impact the durability and safety of buried electrical systems.