When installed under metal-corrugated sheet roof decking, do the rules for spacing apply equally to rigid metal conduit and intermediate metal conduit?

The statement is indeed accurate because both rigid metal conduit (RMC) and intermediate metal conduit (IMC) are required to adhere to the same spacing rules when installed under metal-corrugated sheet roof decking. The National Electrical Code (NEC) provides guidelines that ensure the secure and safe installation of conduits, regardless of their type, to maintain structural integrity and protect the electrical wiring within them from potential hazards such as mechanical damage.

The spacing rules are designed to provide adequate support for the conduits, thereby preventing sagging or excessive movement that could lead to damage over time. Since both RMC and IMC are intended for similar applications and have comparable physical characteristics, it is essential that the same spacing criteria apply to both types of conduits in such installations. This uniformity helps streamline the installation process and ensures compliance with safety regulations.