What is the trade size range for Intermediate Metal Conduit (IMC)?

The trade size range for Intermediate Metal Conduit (IMC) is accurately identified as 1/2" to 4". IMC is designed to provide protection for electrical wiring in environments where additional mechanical protection is needed, and its size range is suitable for a broad array of conduit needs in various installations.

The 1/2" to 4" range allows for flexibility in the types of electrical systems protected, accommodating different wire sizes and cable configurations. This size range is relevant in both residential and commercial applications, ensuring compliance with electrical codes and safety standards.

The other options either extend the maximum size beyond what is standard for IMC or do not cover the full range of typical sizes, making them incorrect. Therefore, the choice that aligns with the established industry standard is indeed the one that specifies the trade size range from 1/2" to 4".