What is the maximum diameter for flexible metal conduit usage?

The maximum diameter for flexible metal conduit, also known as FMC, is indeed 2 inches. This limit is established to maintain the integrity and flexibility of the conduit while ensuring it can serve its intended purpose of protecting wiring in a variety of environments.

Flexible metal conduit is commonly used in situations where flexibility is required for installation or when the conduit needs to navigate around obstacles. If the conduit were to exceed this diameter, its flexibility would diminish, which could lead to difficulties during installation and potentially increase the risk of damage to the wiring inside.

Using smaller diameters under 2 inches is common for most standard applications, which helps to ensure that the conduit remains manageable and suitable for the routing of electrical cabling without compromising safety or functionality. Therefore, understanding the constraints on the size of flexible metal conduit is crucial for ensuring compliance with electrical codes and standards.