Can PVC raceways be concealed in walls, floors, and ceilings?

PVC raceways are indeed permitted to be concealed within walls, floors, and ceilings when installed according to the National Electrical Code (NEC) guidelines. This method of installation is commonly adopted to protect electrical wiring and maintain a clean and organized appearance in buildings.

When PVC raceways are concealed, they must be installed in a manner that ensures they can be accessed for maintenance, and the materials used need to be suitable for the location, considering factors such as fire safety and environmental exposure. Additionally, the raceways must adhere to code specifications regarding support, fittings, and overall suitability for the electrical devices or wiring contained within them.

The other options suggest limitations or constraints on the installation of PVC raceways. However, as long as the installation follows the established code rules and local regulations, concealing them is permissible, which aligns with why the choice indicating they can be concealed is the accurate response.