What type of conduit is described as a metal thin-walled conduit?

The type of conduit that is classified as a metal thin-walled conduit is EMT conduit, or Electrical Metallic Tubing. EMT is designed specifically for use in electrical applications where a light-weight and thin-walled metal conduit is required. This type of conduit is often used in indoor installations, as it is easy to handle and install, providing both protection to the wires inside and a neat appearance to the overall installation.

EMT is non-threaded and is typically used with connectors and fittings that are clamped or pressed onto the conduit, making it a popular choice among contractors. Its lightweight nature does not compromise its structural integrity, and it is relatively resistant to external damage compared to other conduit types.

In contrast, rigid conduit is heavier and thicker, intended for heavier duty installations, while PVC conduit is made from plastic and typically used in underground or wet locations. Intermediate metal conduit is also heavier than EMT, providing additional durability but not fitting the thin-walled description. This understanding highlights why EMT conduit is the correct answer for the type of metal thin-walled conduit being referred to.