When IMC is cut in the field, reaming is required to remove burrs and rough edges.

• A. True
• B. False
• C. Not required
• D. Only for large sizes

Answer: (A)

Field-cut IMC ends often come with sharp burrs and rough edges. Reaming or deburring removes these edges, creating a smooth interior and a clean exterior edge so conductors can be pulled through without nicking insulation, and so fittings and couplings seat properly. If burrs are left, they can damage insulation as the wire passes through and can interfere with the threads or seating of connectors, posing safety and reliability problems. This requirement applies to IMC of all sizes, not just large sizes, so the practice is a standard part of field installation. A simple reamer or deburring tool is typically used to achieve this.