Which conduit type is a rigid metal option suitable for straight indoor runs?

• A. Electrical Metallic Tubing (EMT)
• B. Flexible conduit
• C. Rigid Metal Conduit (RMC)
• D. Polyvinyl chloride (PVC)

Answer: (A)

For straight indoor runs, you want a rigid metal conduit that is practical to install inside walls and ceilings. Electrical Metallic Tubing is a thin-walled rigid metal conduit designed for interior dry locations. It provides solid protection for the conductors while remaining light enough to install along straight, indoor paths with standard fittings and clamps. Flexible conduit isn’t rigid, so it wouldn’t fit the requirement for a straight rigid option. Rigid Metal Conduit is indeed rigid, but it’s heavier and generally used where extra protection or outdoor exposure is needed, not as common for typical indoor runs. PVC is nonmetallic and is usually chosen for different environments, such as underground or exposed moisture locations, not as the metal rigid option for indoor straight runs.