Which type of 2-inch raceway has the smallest cross-sectional area?

The choice of Schedule 80 PVC as the type of 2-inch raceway with the smallest cross-sectional area is based on its construction and design characteristics. Schedule 80 PVC conduit is thicker-walled and specifically designed for protection in environments that may experience mechanical damage.

In comparison to other types, Schedule 80 PVC has a smooth internal surface, which allows for efficient wire pulling while still lending itself to a more compact cross-sectional area than metal conduits like RMC and EMT. Rigid metal conduit tends to have a heavier-gauge metal construction, leading to a larger overall diameter due to the required wall thickness for strength and grounding. Similarly, EMT, while lighter than RMC, still maintains a certain wall thickness that contributes to a larger cross-sectional area compared to Schedule 80 PVC.

Liquidtight flexible conduit, on the other hand, is designed for flexibility and moisture protection, often leading to internal design features that can also increase its cross-sectional area. It is important to recognize that while all these conduits serve different purposes, the specific design and dimensions of Schedule 80 PVC allow it to occupy the least amount of space while still meeting the necessary protective requirements for electrical wiring.