What type of conduit is commonly used for outdoor installations?

Rigid PVC conduit is often used for outdoor installations due to its robust nature and resistance to moisture and corrosion. This conduit material is lightweight, easy to handle, and provides excellent insulation against electrical conductivity, making it ideal for protection of wiring in outdoor environments where exposure to the elements is a concern.

Additionally, rigid PVC conduit can be buried underground and withstands various environmental conditions, which makes it highly suitable for outdoor wiring applications. It also effectively prevents damage from direct sunlight and does not rust or deteriorate easily compared to metal conduits, making it a preferred choice for long-term outdoor installations.

In contrast, rigid metal conduit may be more durable in terms of physical protection but can be prone to corrosion when exposed to moisture unless properly coated or treated. Flexible conduit, while adaptable and often used in various applications, does not provide the same level of protection for situations where long-term outdoor exposure is expected. Non-metallic conduit can refer to other materials, but rigid PVC specifically addresses outdoor needs more effectively.