What type of conduit does the Code now permit in wiring when rigid conduit is required?

Intermediate Metal Conduit (IMC) is a type of conduit that is recognized by the National Electrical Code (NEC) as an acceptable substitute when rigid conduit is required. IMC is constructed from steel, making it lighter and easier to handle compared to traditional rigid steel conduit, while still providing the necessary strength and protection for electrical wiring.

The use of IMC is preferred in many applications because it offers similar durability and can be installed with fewer supports due to its inherent strength. This provides electricians with a more versatile option, allowing for easier installation in various environments, while also ensuring compliance with safety standards.

Flexible conduit, plastic conduit, and Electrical Nonmetallic Tubing (ENT) are alternatives, but they do not meet the requirements where rigid conduit is mandated due to considerations of physical protection and suitability for certain environments. Therefore, IMC stands out as an appropriate choice in scenarios where the Code specifies the need for rigid conduit.