Which type of conduit is least likely to be affected by corrosion?

PVC conduit is widely regarded as the least likely type to be affected by corrosion due to its chemical resistance properties. Unlike metal conduits, which can corrode when exposed to moisture, salts, and other environmental factors, PVC is made from plastic, which does not easily rust or deteriorate in the same way.

This makes PVC particularly suitable for outdoor environments or areas subject to harsh conditions, where other types of conduit might fail over time due to corrosion. Additionally, PVC is resistant to many chemicals, further extending its lifespan and utility in various applications.

In contrast, metal conduits, including aluminum, are more susceptible to corrosion, especially in moist or chemically aggressive environments. Fiber conduit is also not as versatile in terms of exposure and can face issues related to its structural integrity when subjected to the elements. Thus, PVC conduit stands out as the most resilient option against corrosion.