What type of conduit is typically used for outdoor applications due to its durability?

The most appropriate choice for outdoor applications is typically PVC conduit. It is specifically designed to withstand environmental stressors such as moisture, UV exposure, and temperature fluctuations. PVC (Polyvinyl Chloride) is a non-metallic conduit that does not corrode, making it ideal for outdoor installations where it will be exposed to the elements. Its lightweight characteristics ease handling during installation, and it can handle a significant amount of mechanical impact, which is important for outdoor durability.

In contrast, while metallic conduit, such as EMT (Electrical Metallic Tubing) or rigid metal conduit, offers durability, it is not as resistant to corrosion as PVC and may require additional coatings or treatment when used outdoors. Flexible conduit, being intended mainly for applications that require bending and flexibility, is not primarily designed for harsh outdoor conditions. Rigid conduit is stronger than flexible conduit but may not provide the same level of corrosion resistance in outdoor applications as PVC.

Thus, PVC conduit stands out as the best option for outdoor durability, given its resistant properties and suitability for various conditions.