What type of conduit should be used for direct burial cable emerging from the ground when it is subject to physical damage?

When direct burial cable is coming up from the ground and is at risk of physical damage, the use of Schedule 80 PVC conduit is appropriate. This type of conduit is designed with thicker walls compared to Schedule 40 PVC, making it more robust and resistant to impacts and physical stresses that can occur in environments where the cable may be exposed to potential damage. The added strength of Schedule 80 PVC is critical in ensuring the integrity of the electrical installation, as it provides additional protection against crushing forces, impacts, and other mechanical stresses.

In contrast, other types of conduit may not provide the same level of protection. For instance, while rigid metal conduit is a strong option, it may not be necessary for all applications and involves additional considerations regarding corrosion and electrical grounding. Flexible conduit, while useful in certain scenarios where movement or adjustments are required, generally does not offer the same durability against physical damage as Schedule 80 PVC. Understanding the specific environmental conditions and the level of potential physical damage is crucial when choosing the right conduit for electrical installations.